阅读说明：本技术 钢卷尺可靠性试验装置 (Steel tape reliability test device ) 是由 李洪洲 张爽 钟梓楠 阴子昊 邢钟元 卢杰 于 2019-09-20 设计创作，主要内容包括：本发明属于测量工具可靠性技术领域,尤其涉及一种钢卷尺可靠性试验装置,克服了目前可靠性试验装置无法对钢卷尺进行可靠性试验的问题,包括支撑架、扭矩检测装置、钢卷尺开启装置、拉尺装置、钢卷尺回卷速度检测装置和控制台；所述支撑架、扭矩检测装置、钢卷尺开启装置、拉尺装置、钢卷尺回卷速度检测装置均安装在支撑架的上表面；所述钢卷尺开启装置位于扭矩检测装置的一侧；所述拉尺装置位于扭矩检测装置的另一侧；所述钢卷尺回卷速度检测装置位于拉尺装置的上侧。(The invention belongs to the technical field of measuring tool reliability, and particularly relates to a steel tape reliability test device which solves the problem that the conventional reliability test device cannot perform reliability test on a steel tape, and comprises a support frame, a torque detection device, a steel tape opening device, a pull tape device, a steel tape rewinding speed detection device and a control console; the support frame, the torque detection device, the steel tape opening device, the pull tape device and the steel tape rewinding speed detection device are all arranged on the upper surface of the support frame; the steel tape opening device is positioned on one side of the torque detection device; the pull rule device is positioned on the other side of the torque detection device; the steel tape rewinding speed detection device is positioned on the upper side of the pull tape device.)

1. The utility model provides a steel tape reliability test device which characterized in that: comprises a support frame (1), a torque detection device, a steel tape opening device, a pull tape device, a steel tape rewinding speed detection device and a control console (20);

the torque detection device comprises a torque sensor (15), a No. 3 coupler (14), a support unit (13), a photoelectric rotating speed sensor (12), a U-shaped frame (17) and an adjusting locking bolt (18);

the shaft of the torque sensor (15) is connected with the left end of a shaft (1308) No. 1 of the support unit (13) through a shaft coupler (14) No. 3; the detection head of the photoelectric rotating speed sensor (12) is fixed on the support frame (1) through a bracket, and the detection wheel of the photoelectric rotating speed sensor (12) is fixedly arranged on a No. 1 shaft (1308); the right end of the No. 1 shaft (1308) is fixedly connected with the left end of the U-shaped frame (17); an adjusting locking bolt (18) is arranged at the right end of the U-shaped frame (17);

the steel tape opening device comprises a No. 1 bracket (11) and an opening mechanism (9); the No. 1 support (11) is fixed on the upper surface of the support frame (1) through a bolt and is positioned on one side of the torque detection device; the opening mechanism (9) is fixed on the No. 1 bracket (11) through a bolt;

the pull rod device comprises a guide rail (2), a pull rod mechanism (3), a rack (4), a laser speed sensor (5) and a No. 1 laser displacement sensor (8);

the guide rail (2) is fixed on the upper surface of the support frame (1) through bolts; a sliding block (324) of the pull rule mechanism (3) is installed with the guide rail (2) in a matching way; the rack (4) is fixed on the upper surface of the support frame (1) through a bolt; a gear (309) of the pull rod mechanism (3) is meshed with the rack (4); the laser speed sensor (5) and the No. 1 laser displacement sensor (8) are arranged at one end of the guide rail (2); the laser speed sensor (5) and the No. 1 laser displacement sensor (8) are respectively connected with the console (20) through electric wires;

the steel tape rewinding speed detection device comprises a No. 1 photoelectric sensor (6), a No. 2 photoelectric sensor (7) and a photoelectric sensor bracket (19); the photoelectric sensor support (19) is fixed on the upper surface of the support frame (1) through bolts, and the No. 1 photoelectric sensor (6) and the No. 2 photoelectric sensor (7) are fixed on the photoelectric sensor support (19) through bolts; the shaft axes of the No. 1 photoelectric sensor (6) and the No. 2 photoelectric sensor (7) are in the same vertical plane with the symmetrical center line (1701) of the U-shaped frame (17); the axis of the No. 1 photoelectric sensor (6) is parallel to the axis of the No. 2 photoelectric sensor (7) and is perpendicular to the axis of the No. 1 shaft (1308).

2. The steel tape reliability testing device of claim 1, wherein:

the torque detection device further comprises a torque sensor support (16); the lower end of the torque sensor bracket (16) is fixed on the upper surface of the support frame (1) through a bolt; the torque sensor (15) is fixed on the torque sensor bracket (16) through a bolt.

3. The steel tape reliability testing device of claim 1, wherein:

the No. 1 support (11) comprises a fixed cylinder (1101), an expansion rod (1102), an upper plate (1103), a lower plate (1104) and a locking bolt (1105); the lower end of the fixed cylinder (1101) is welded with the lower plate (1104), and the axis of the fixed cylinder (1101) is vertical to the upper surface of the lower plate (1104); the lower plate (1104) is fixed at one end of the upper surface of the support frame (1) through a bolt; the telescopic rod (1102) can be stretched in an inner hole of the fixed cylinder (1101); the upper end of the telescopic rod (1102) is welded with the upper plate (1103), and the central line of the telescopic rod (1102) is vertical to the lower surface of the upper plate (1103); after the height of the telescopic rod (1102) is adjusted, the telescopic rod (1102) is fixed on the fixed cylinder (1101) by screwing the locking bolt (1105).

4. The steel tape reliability testing device of claim 1, wherein:

the support unit (13) comprises an adjusting nut (1301), a sleeve (1302), a right end cover (1303), a right deep groove ball bearing (1304), an outer sleeve (1305), a left deep groove ball bearing (1306), a left end cover (1307), a No. 1 shaft (1308) and a No. 2 support (1309);

the No. 2 bracket (1309) is fixed at one end of the upper surface of the support frame (1) through a bolt; the right end cover (1303) is fixed on the right end face of the No. 2 bracket (1309) through a bolt; the right end face of the right deep groove ball bearing (1304) is in contact with the left end face of the right end cover (1303); the left end face of the right deep groove ball bearing (1304) is in contact with the right end face of the outer sleeve (1305); the left end surface of the outer sleeve (1305) is in contact with the right end surface of the left deep groove ball bearing (1306); the left end surface of the left deep groove ball bearing (1306) is in contact with the right end surface of the left end cover (1307); the left end cover (1307) is fixed on the left end face of the No. 2 bracket (1309) through a bolt; the left end surface of the inner ring of the left deep groove ball bearing (1306) is in contact with the left end surface of a shaft shoulder of the shaft No. 1 (1308); the left end surface of the sleeve (1302) is in contact with the right end surface of the inner ring of the right deep groove ball bearing (1304); the right end face of the sleeve (1302) is in contact with the left end face of the adjusting nut (1301); the adjusting nut (1301) is screwed on a No. 1 shaft (1308).

5. The steel tape reliability testing device of claim 1, wherein:

the opening mechanism (9) comprises an electric push rod (901), a No. 1 pull pressure sensor (902), a No. 1 hinge (903), a No. 2 hinge (904), a rotating frame (905), an inclination angle sensor (906), a No. 1 lead screw (907), a guide rod (908), a pull rod (909), a screw nut (910), a No. 2 laser displacement sensor (911), a left guide rod frame (912), a support (913), a No. 1 stepping motor (914) and a right guide rod frame (915);

the lower surface of the support (913) is fixed on the upper plate (1103) through bolts;

the upper right end of the support (913) is of a U-shaped structure, and one end of the rotating frame (905) is hinged with the U-shaped structure at the upper right end of the support (913) through a hinge (904); the lower end of the electric push rod (901) is hinged with the step surface at the upper left end of the support (913) through a hinge; an extending shaft of the electric push rod (901) is connected with the lower end of a No. 1 pull pressure sensor (902); the upper end of the No. 1 pull pressure sensor (902) is hinged with the left end of the rotating frame (905) through a No. 1 hinge (903);

the inclination angle sensor (906) is fixed on the upper surface of the rotating frame (905) through a bolt and used for detecting the rotating angle of the rotating frame (905); the right guide rod frame (915) is fixed at the right end of the lower surface of the rotating frame (905) through a bolt; the left guide rod frame (912) is fixed at the left end of the lower surface of the rotating frame (905) through a bolt; two ends of the two guide rods 908 are respectively fixed on a left guide rod frame (912) and a right guide rod frame (915), and the axes of the two guide rods (908) are parallel; the No. 1 stepping motor (914) is fixed on the left side surface of the left guide rod frame (912) through a bolt; the left end of the No. 1 lead screw (907) is connected with a motor shaft of a No. 1 stepping motor (914) through a coupler, and the axis of the No. 1 lead screw (907) is parallel to the axes of the two guide rods (908); through holes are formed in the two sides of the nut (910) and are respectively used for penetrating through the optical axis sections of the two guide rods (908), and the through holes are in clearance fit; the middle of the nut (910) is provided with a threaded hole for screwing the threaded section of the No. 1 lead screw (907); the axes of the two guide rods (908) are perpendicular to the axis of the No. 1 shaft (1308);

the left end of the pull rod (909) is fixed on the lower surface of the nut (910); the right end of the pull rod (909) is of a V-shaped structure, and the lower surface of the V-shaped structure is in contact with a locking switch (1001) of the steel tape (10); the No. 2 laser displacement sensor (911) is fixed on the front side surface of the right guide rod frame (915) through a bolt.

6. The steel tape reliability testing device of claim 1, wherein:

the pull rule mechanism (3) comprises a pull plate (301), a press buckle (302), a No. 2 stepping motor (303), a No. 2 pull pressure sensor (304), a walking frame (305), a vertical adjusting shaft (306), a No. 3 stepping motor (307), a No. 4 stepping motor (308), a gear (309), a No. 1 coupling (310), an upper nut (311), a double-head screw rod (312), a lower nut (313), a lower adjusting rod (314), a lower adjusting plate (315) and a No. 1 belt pulley (316), the device comprises a belt (317), a No. 5 stepping motor (318), an upper adjusting rod (319), a No. 2 coupling (320), a vertical adjusting screw nut (321), a No. 2 lead screw (322), a No. 1 base (323), a sliding block (324), a No. 2 base (325), a No. 2 guide plate (326), a No. 1 guide plate (327), a connecting rod (328), a pull rule frame (329), a rotating shaft (330) and a No. 2 belt pulley (331);

the No. 4 stepping motor (308) is fixed on the upper surface of the right side of the sliding block (324) through a bolt; the gear (309) is fixedly arranged on a motor shaft of the No. 4 stepping motor (308), and the axis of the motor shaft of the No. 4 stepping motor (308) is vertical to the central line of the rack 4; the walking frame (305) is fixed on the upper surface of the left side of the sliding block (324) through a bolt;

the No. 3 stepping motor (307) is fixed on the upper surface of the walking frame (305) through a bolt; the upper end of the No. 2 lead screw (322) is connected with a motor shaft of the No. 3 stepping motor (307) through a No. 2 coupler (320); the lower end of the No. 2 lead screw (322) is in clearance fit with a hole of the No. 1 base (323); the No. 1 base (323) is fixed on the lower bottom surface of the cavity of the walking frame (305); the motor axis of the No. 3 stepping motor (307) is coaxial with the axis of the No. 2 lead screw (322);

the right end of the vertical adjusting shaft (306) is provided with a threaded hole which is matched with the No. 2 lead screw (322);

the No. 2 guide plate (326) is fixed on the left end face of the walking frame (305) through bolts; the middle of the No. 2 guide plate (326) is provided with a long hole for penetrating through the vertical adjusting shaft (306), and the vertical adjusting shaft (306) is in clearance fit with the long hole of the No. 2 guide plate (326);

the left end of the vertical adjusting shaft (306) is connected with the right end of the No. 2 pulling pressure sensor (304) through threads; the left end of the No. 2 pull pressure sensor (304) is connected with the right end of a connecting rod (328);

the left end of the connecting rod (328) is fixed on the right end face of the ruler frame (329) through a bolt; the upper surface of the pull rule frame (329) is vertical to the right end surface;

the No. 2 stepping motor (303) is fixed on the upper end face of the pull rule frame (329) through a bolt;

the upper end of the double-head lead screw (312) is connected with a No. 2 stepping motor (303) through a No. 1 coupler (310);

the No. 2 base (325) is fixed on the bottom surface of an inner cavity of the pull rule frame (329) through bolts; the axis of the double-head lead screw (312) is coaxial with the motor axis of the No. 2 stepping motor (303);

a threaded hole at the right end of the upper adjusting rod (319) is sleeved on a right-handed thread section of the double-ended lead screw (312); the axis of the upper adjusting rod (319) is vertical to the axis of the double-head lead screw (312); the pressing buckle (302) is fixed at the left end of the upper adjusting rod (319); the lower surface of the press buckle (302) is coplanar with the axis of the upper adjusting rod (319), and is perpendicular to the axis of the double-head screw rod (312); the threaded hole at the right end of the lower adjusting rod (314) is sleeved on the left-handed thread section of the double-head screw rod (312); the right end of the lower adjusting plate (315) is fixed at the left end of the lower adjusting rod (314); the axis of the lower adjusting rod (314) is perpendicular to the axis of the double-end lead screw (312); the No. 1 guide plate (327) is fixed on the left end face of the pull rule frame (329) through bolts; the middle of the No. 1 guide plate (327) is provided with a long hole with a vertical center line, and the long hole is used for penetrating through the upper adjusting rod (319) and the lower adjusting rod (314);

one end of the pulling plate (301) is fixedly connected with the rotating shaft (330); the rotating shaft (330) is in clearance fit with a hole at the left end of the lower adjusting plate (315); the No. 1 belt pulley (316) is fixedly arranged at one end of the rotating shaft (330);

the No. 5 stepping motor (318) is fixed on the lower surface of the lower adjusting plate (315) through bolts; the axis of the motor shaft of the No. 5 stepping motor (318) is parallel to the axis of the rotating shaft (330); a No. 2 belt pulley (331) is arranged on a motor shaft of the No. 5 stepping motor (318); the belt (317) is sleeved on the No. 1 belt pulley (316) and the No. 2 belt pulley (331).

Technical Field

The invention relates to the technical field of measuring tool reliability, in particular to a steel tape reliability testing device.

Background

The steel tape is widely applied to daily life of people or production occasions such as buildings. Due to the influence of the use environment and improper operation of a user, the tape can be twisted, broken, rusted or damaged, and the normal work of people is influenced. The reliability test of the steel tape is carried out to obtain the reliability test data, and the basis is provided for the reliability improvement design of the steel tape. At present, the reliability test of the steel tape is usually a field reliability test, and a reliability test device specially aiming at the steel tape is almost blank in China. Aiming at the problems, the invention provides a steel tape reliability test device.

Disclosure of Invention

The invention aims to solve the technical problem that the existing reliability test device cannot carry out reliability test on a steel tape, and provides the reliability test device for the steel tape.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme, which is described by combining the accompanying drawings as follows:

a steel tape reliability test device comprises a support frame (1), a torque detection device, a steel tape opening device, a pull tape device, a steel tape rewinding speed detection device and a control console (20);

the torque detection device comprises a torque sensor (15), a No. 3 coupler (14), a support unit (13), a photoelectric rotating speed sensor (12), a U-shaped frame (17) and an adjusting locking bolt (18);

the shaft of the torque sensor (15) is connected with the left end of a shaft (1308) No. 1 of the support unit (13) through a shaft coupler (14) No. 3; the detection head of the photoelectric rotating speed sensor (12) is fixed on the support frame (1) through a bracket, and the detection wheel of the photoelectric rotating speed sensor (12) is fixedly arranged on a No. 1 shaft (1308); the right end of the No. 1 shaft (1308) is fixedly connected with the left end of the U-shaped frame (17); an adjusting locking bolt (18) is arranged at the right end of the U-shaped frame (17);

the steel tape opening device comprises a No. 1 bracket (11) and an opening mechanism (9); the No. 1 support (11) is fixed on the upper surface of the support frame (1) through a bolt and is positioned on one side of the torque detection device; the opening mechanism (9) is fixed on the No. 1 bracket (11) through a bolt;

the pull rod device comprises a guide rail (2), a pull rod mechanism (3), a rack (4), a laser speed sensor (5) and a No. 1 laser displacement sensor (8);

the guide rail (2) is fixed on the upper surface of the support frame (1) through bolts; a sliding block (324) of the pull rule mechanism (3) is installed with the guide rail (2) in a matching way; the rack (4) is fixed on the upper surface of the support frame (1) through a bolt; a gear (309) of the pull rod mechanism (3) is meshed with the rack (4); the laser speed sensor (5) and the No. 1 laser displacement sensor (8) are arranged at one end of the guide rail (2); the laser speed sensor (5) and the No. 1 laser displacement sensor (8) are respectively connected with the console (20) through electric wires;

the steel tape rewinding speed detection device comprises a No. 1 photoelectric sensor (6), a No. 2 photoelectric sensor (7) and a photoelectric sensor bracket (19); the photoelectric sensor support (19) is fixed on the upper surface of the support frame (1) through bolts, and the No. 1 photoelectric sensor (6) and the No. 2 photoelectric sensor (7) are fixed on the photoelectric sensor support (19) through bolts; the shaft axes of the No. 1 photoelectric sensor (6) and the No. 2 photoelectric sensor (7) are in the same vertical plane with the symmetrical center line (1701) of the U-shaped frame (17); the axis of the No. 1 photoelectric sensor (6) is parallel to the axis of the No. 2 photoelectric sensor (7) and is perpendicular to the axis of the No. 1 shaft (1308);

the torque detection device in the technical scheme further comprises a torque sensor bracket (16); the lower end of the torque sensor bracket (16) is fixed on the upper surface of the support frame (1) through a bolt; the torque sensor (15) is fixed on the torque sensor bracket (16) through a bolt;

in the technical scheme, the No. 1 support (11) comprises a fixing cylinder (1101), an expansion rod (1102), an upper plate (1103), a lower plate (1104) and a locking bolt (1105); the lower end of the fixed cylinder (1101) is welded with the lower plate (1104), and the axis of the fixed cylinder (1101) is vertical to the upper surface of the lower plate (1104); the lower plate (1104) is fixed at one end of the upper surface of the support frame (1) through a bolt; the telescopic rod (1102) can be stretched in an inner hole of the fixed cylinder (1101); the upper end of the telescopic rod (1102) is welded with the upper plate (1103), and the central line of the telescopic rod (1102) is vertical to the lower surface of the upper plate (1103); after the height of the telescopic rod (1102) is adjusted, the telescopic rod (1102) is fixed on the fixed cylinder (1101) by screwing the locking bolt (1105);

in the technical scheme, the support unit (13) comprises an adjusting nut (1301), a sleeve (1302), a right end cover (1303), a right deep groove ball bearing (1304), an outer sleeve (1305), a left deep groove ball bearing (1306), a left end cover (1307), a No. 1 shaft (1308) and a No. 2 support (1309);

the No. 2 bracket (1309) is fixed at one end of the upper surface of the support frame (1) through a bolt; the right end cover (1303) is fixed on the right end face of the No. 2 bracket (1309) through a bolt; the right end face of the right deep groove ball bearing (1304) is in contact with the left end face of the right end cover (1303); the left end face of the right deep groove ball bearing (1304) is in contact with the right end face of the outer sleeve (1305); the left end surface of the outer sleeve (1305) is in contact with the right end surface of the left deep groove ball bearing (1306); the left end surface of the left deep groove ball bearing (1306) is in contact with the right end surface of the left end cover (1307); the left end cover (1307) is fixed on the left end face of the No. 2 bracket (1309) through a bolt; the left end surface of the inner ring of the left deep groove ball bearing (1306) is in contact with the left end surface of a shaft shoulder of the shaft No. 1 (1308); the left end surface of the sleeve (1302) is in contact with the right end surface of the inner ring of the right deep groove ball bearing (1304); the right end face of the sleeve (1302) is in contact with the left end face of the adjusting nut (1301); the adjusting nut (1301) is screwed on a No. 1 shaft (1308);

in the technical scheme, the opening mechanism (9) comprises an electric push rod (901), a No. 1 pull pressure sensor (902), a No. 1 hinge (903), a No. 2 hinge (904), a rotating frame (905), an inclination angle sensor (906), a No. 1 lead screw (907), a guide rod (908), a pull rod (909), a screw (910), a No. 2 laser displacement sensor (911), a left guide rod frame (912), a support (913), a No. 1 stepping motor (914) and a right guide rod frame (915);

the lower surface of the support (913) is fixed on the upper plate (1103) through bolts;

the upper right end of the support (913) is of a U-shaped structure, and one end of the rotating frame (905) is hinged with the U-shaped structure at the upper right end of the support (913) through a hinge (904); the lower end of the electric push rod (901) is hinged with the step surface at the upper left end of the support (913) through a hinge; an extending shaft of the electric push rod (901) is connected with the lower end of a No. 1 pull pressure sensor (902); the upper end of the No. 1 pull pressure sensor (902) is hinged with the left end of the rotating frame (905) through a No. 1 hinge (903);

the inclination angle sensor (906) is fixed on the upper surface of the rotating frame (905) through a bolt and used for detecting the rotating angle of the rotating frame (905); the right guide rod frame (915) is fixed at the right end of the lower surface of the rotating frame (905) through a bolt; the left guide rod frame (912) is fixed at the left end of the lower surface of the rotating frame (905) through a bolt; two ends of the two guide rods 908 are respectively fixed on a left guide rod frame (912) and a right guide rod frame (915), and the axes of the two guide rods (908) are parallel; the No. 1 stepping motor (914) is fixed on the left side surface of the left guide rod frame (912) through a bolt; the left end of the No. 1 lead screw (907) is connected with a motor shaft of a No. 1 stepping motor (914) through a coupler, and the axis of the No. 1 lead screw (907) is parallel to the axes of the two guide rods (908); through holes are formed in the two sides of the nut (910) and are respectively used for penetrating through the optical axis sections of the two guide rods (908), and the through holes are in clearance fit; the middle of the nut (910) is provided with a threaded hole for screwing the threaded section of the No. 1 lead screw (907); the axes of the two guide rods (908) are perpendicular to the axis of the No. 1 shaft (1308);

the left end of the pull rod (909) is fixed on the lower surface of the nut (910); the right end of the pull rod (909) is of a V-shaped structure, and the lower surface of the V-shaped structure is in contact with a locking switch (1001) of the steel tape (10); the No. 2 laser displacement sensor (911) is fixed on the front side surface of the right guide rod frame (915) through a bolt;

in the technical scheme, the pull rule mechanism (3) comprises a pull plate (301), a press buckle (302), a No. 2 stepping motor (303), a No. 2 pull pressure sensor (304), a walking frame (305), a vertical adjusting shaft (306), a No. 3 stepping motor (307), a No. 4 stepping motor (308), a gear (309), a No. 1 coupling (310), an upper nut (311), a double-head screw (312), a lower nut (313), a lower adjusting rod (314), a lower adjusting plate (315) and a No. 1 belt pulley (316), the device comprises a belt (317), a No. 5 stepping motor (318), an upper adjusting rod (319), a No. 2 coupling (320), a vertical adjusting screw nut (321), a No. 2 lead screw (322), a No. 1 base (323), a sliding block (324), a No. 2 base (325), a No. 2 guide plate (326), a No. 1 guide plate (327), a connecting rod (328), a pull rule frame (329), a rotating shaft (330) and a No. 2 belt pulley (331);

the No. 4 stepping motor (308) is fixed on the upper surface of the right side of the sliding block (324) through a bolt; the gear (309) is fixedly arranged on a motor shaft of the No. 4 stepping motor (308), and the axis of the motor shaft of the No. 4 stepping motor (308) is vertical to the central line of the rack 4; the walking frame (305) is fixed on the upper surface of the left side of the sliding block (324) through a bolt;

the No. 3 stepping motor (307) is fixed on the upper surface of the walking frame (305) through a bolt; the upper end of the No. 2 lead screw (322) is connected with a motor shaft of the No. 3 stepping motor (307) through a No. 2 coupler (320); the lower end of the No. 2 lead screw (322) is in clearance fit with a hole of the No. 1 base (323); the No. 1 base (323) is fixed on the lower bottom surface of the cavity of the walking frame (305); the motor axis of the No. 3 stepping motor (307) is coaxial with the axis of the No. 2 lead screw (322);

the right end of the vertical adjusting shaft (306) is provided with a threaded hole which is matched with the No. 2 lead screw (322);

the No. 2 guide plate (326) is fixed on the left end face of the walking frame (305) through bolts; the middle of the No. 2 guide plate (326) is provided with a long hole for penetrating through the vertical adjusting shaft (306), and the vertical adjusting shaft (306) is in clearance fit with the long hole of the No. 2 guide plate (326);

the left end of the vertical adjusting shaft (306) is connected with the right end of the No. 2 pulling pressure sensor (304) through threads; the left end of the No. 2 pull pressure sensor (304) is connected with the right end of a connecting rod (328);

the left end of the connecting rod (328) is fixed on the right end face of the ruler frame (329) through a bolt; the upper surface of the pull rule frame (329) is vertical to the right end surface;

the No. 2 stepping motor (303) is fixed on the upper end face of the pull rule frame (329) through a bolt;

the upper end of the double-head lead screw (312) is connected with a No. 2 stepping motor (303) through a No. 1 coupler (310);

the No. 2 base (325) is fixed on the bottom surface of an inner cavity of the pull rule frame (329) through bolts; the axis of the double-head lead screw (312) is coaxial with the motor axis of the No. 2 stepping motor (303);

a threaded hole at the right end of the upper adjusting rod (319) is sleeved on a right-handed thread section of the double-ended lead screw (312); the axis of the upper adjusting rod (319) is vertical to the axis of the double-head lead screw (312); the pressing buckle (302) is fixed at the left end of the upper adjusting rod (319); the lower surface of the press buckle (302) is coplanar with the axis of the upper adjusting rod (319), and is perpendicular to the axis of the double-head screw rod (312); the threaded hole at the right end of the lower adjusting rod (314) is sleeved on the left-handed thread section of the double-head screw rod (312); the right end of the lower adjusting plate (315) is fixed at the left end of the lower adjusting rod (314); the axis of the lower adjusting rod (314) is perpendicular to the axis of the double-end lead screw (312); the No. 1 guide plate (327) is fixed on the left end face of the pull rule frame (329) through bolts; the middle of the No. 1 guide plate (327) is provided with a long hole with a vertical center line, and the long hole is used for penetrating through the upper adjusting rod (319) and the lower adjusting rod (314);

one end of the pulling plate (301) is fixedly connected with the rotating shaft (330); the rotating shaft (330) is in clearance fit with a hole at the left end of the lower adjusting plate (315); the No. 1 belt pulley (316) is fixedly arranged at one end of the rotating shaft (330);

the No. 5 stepping motor (318) is fixed on the lower surface of the lower adjusting plate (315) through bolts; the axis of the motor shaft of the No. 5 stepping motor (318) is parallel to the axis of the rotating shaft (330); a No. 2 belt pulley (331) is arranged on a motor shaft of the No. 5 stepping motor (318); the belt (317) is sleeved on the No. 1 belt pulley (316) and the No. 2 belt pulley (331).

The invention has the beneficial effects that:

1. the steel tape reliability test device provided by the invention adopts the stepping motor and the electric push rod as power, the actual use process of a steel tape user using the steel tape is simulated through the steel tape opening device, the torque detection device and the pull tape device, the reliability test of simulating actual real working conditions is carried out on the steel tape, real-time fault data acquisition is carried out, practical basic data are provided for reliability evaluation, reliability modeling and reliability prediction in the later period, and the data acquisition time is greatly shortened.

2. The steel tape reliability test device provided by the invention adopts the pull tape device to realize the pull-out simulation of the steel tape. Meanwhile, the pulling force, the speed and the displacement value of the corresponding steel tape are detected through the pulling pressure sensor, the speed sensor and the displacement sensor, and the pulling simulation loading of a user on the steel tape is realized.

3. The steel tape reliability test device provided by the invention adopts the torque detection device to simulate the state that a user holds the tape, detects the impact force and the speed when the tape returns to the interior of the steel tape through the torque sensor and the angle sensor, and simultaneously stores test parameters so as to facilitate subsequent inquiry and analysis.

4. The steel tape reliability test device provided by the invention adopts the steel tape opening device to simulate the operation of a human hand, so that the loading of the locking switch of the steel tape is realized. The pressure value and the displacement value of the locking switch of the steel tape are detected through the tension pressure sensor and the displacement sensor, and meanwhile, the test parameters are stored, so that subsequent query and analysis are facilitated.

5. The steel tape reliability test device provided by the invention adopts the steel tape rewinding speed detection device to realize speed value detection when the tape is retracted into the steel tape, so that the influence of the steel tape head on the steel tape body can be analyzed conveniently.

6. The reliability test device for the steel tape can be adjusted and installed according to the specific size of the steel tape, and the flexibility and the universality of the test device are reflected.

Drawings

FIG. 1 is a schematic axial side projection of the overall structure of the steel tape reliability testing apparatus of the present invention;

FIG. 2 is a schematic sectional view showing the assembly of the holder unit of the steel tape reliability testing apparatus according to the present invention;

FIG. 3 is a schematic axial side projection of an opening mechanism of the steel tape reliability testing apparatus of the present invention;

FIG. 4 is a schematic axial side projection of bracket No. 1 of the steel tape reliability testing device of the present invention;

FIG. 5 is a schematic view of the steel tape installation of the steel tape reliability testing apparatus of the present invention;

FIG. 6 is a schematic axial side projection of a tape-pulling mechanism of the steel tape reliability testing apparatus of the present invention;

FIG. 7 is a cross-sectional view of the tape holder of FIG. 6 of the steel tape reliability testing apparatus of the present invention;

FIG. 8 is a sectional view of the slider of FIG. 6 mounted on the steel tape reliability testing apparatus of the present invention;

FIG. 9 is a schematic view of the mounting of the pull plate of FIG. 6 of the steel tape reliability testing apparatus of the present invention;

fig. 10 is a schematic diagram of the speed detection principle of the steel tape rewinding speed detection device of the steel tape reliability test device according to the present invention.

In the figure:

1. the device comprises a support frame, 1101, a fixed cylinder, 1102, a telescopic rod, 1103, an upper plate, 1104, a lower plate, 1105, a locking bolt, 2, a guide rail, 3, a pull rod mechanism, 301, a pull plate, 302, a press buckle, 303.2 stepping motors, 304.2 pull pressure sensors, 305, a walking frame, 306, a vertical adjusting shaft, 307.3 stepping motors, 308.4 stepping motors, 309 gears, 310.1 couplers, 311, upper nuts, 312 double-head screws, 313, lower nuts, 314, lower adjusting rods, 315, lower adjusting plates, 316.1 belt pulleys, 317, a belt, 318.5 stepping motors, 319, upper adjusting rods, 320.2 couplers, 321, vertical adjusting nuts, 322.2 lead screws, 323.1 bases, 324, sliders, 325.2 bases, 326.2 guide plates, 1 guide plates, 328, connecting rods, 329 pull rod frames, 330, rotating shafts, 331.2 belt pulleys, 4, 5 racks, 6.6 photoelectric sensors, no. 7.2 photoelectric sensor, No. 8.1 laser displacement sensor, No. 9 opening mechanism, 901 electric push rod, No. 902.1 pull pressure sensor, No. 903.1 hinge, No. 904.2 hinge, 905 revolving rack, 906 tilt angle sensor, No. 907.1 lead screw, 908 guide rod, 909 pull rod, 910 screw nut, No. 911.2 laser displacement sensor, 912 left guide rod rack, 913 support, No. 914.1 stepping motor, 915, right guide rod rack, 916, A surface, 10 steel tape, 1001 locking switch, 1002 drag hook, 1003 symmetrical center line, No. 11.1 bracket, 1101 fixing cylinder, 1102 telescopic rod, 1103, upper plate, 1104 lower plate, 1105 locking bolt, 12 photoelectric rotation speed sensor, 13 bracket unit, 1301 adjusting nut, 1302 sleeve, 1303 right end cap, 1304, right deep groove ball bearing, 1305, 1306 outer sleeve, 1306 left deep groove, 1307 left end cap, 1308.1 shaft, No. 1309.2 shaft coupling, 14.3 bracket, 15. torque sensor, 16 torque sensor support, 17U type frame, 1701 symmetrical center line, 18 adjusting locking bolt, 19 photoelectric sensor support, 20 control panel.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 9, the steel tape reliability testing device according to the present invention includes a supporting frame 1, a torque detecting device, a steel tape opening device, a tape pulling device, a steel tape rewinding speed detecting device, and a console 20.

Referring to fig. 1, the support frame 1 is formed by welding a top plate and four upright posts, a T-shaped groove is formed in the middle of the top plate along the longitudinal direction, and a T-shaped groove is formed in one end of the top plate along the transverse direction.

Torque detector

Referring to fig. 1 and 5, the torque detection device includes a torque sensor 15, a torque sensor support 16, a coupler No. 314, a support unit 13, a photoelectric rotation speed sensor 12, a U-shaped frame 17, and an adjusting locking bolt 18.

Referring to fig. 1, the lower end of the torque sensor bracket 16 is fixed to the upper surface of the support frame 1 by bolts. The torque sensor 15 is fixed to a torque sensor holder 16 by bolts. The torque sensor 15 is wired to the console 20.

Referring to fig. 2, the bracket unit 13 includes an adjusting nut 1301, a sleeve 1302, a right end cover 1303, a right deep groove ball bearing 1304, an outer sleeve 1305, a left deep groove ball bearing 1306, a left end cover 1307, a No. 1 shaft 1308, and a No. 2 bracket 1309.

Referring to fig. 2, the No. 2 bracket 1309 is fixed at one end of the upper surface of the support frame 1 by bolts. The right end cover 1303 is fixed on the right end face of the No. 2 bracket 1309 through a bolt; the right end face of the right deep groove ball bearing 1304 is in contact with the left end face of the right end cover 1303; the left end face of the right deep groove ball bearing 1304 is in contact with the right end face of the outer sleeve 1305; the left end surface of the outer sleeve 1305 is in contact with the right end surface of the left deep groove ball bearing 1306; the left end surface of the left deep groove ball bearing 1306 is in contact with the right end surface of the left end cover 1307; the left end cover 1307 is fixed on the left end face of the No. 2 bracket 1309 through a bolt. The left end surface of the inner ring of the left deep groove ball bearing 1306 is in contact with the left end surface of the shaft shoulder of the shaft No. 1 1308; the left end surface of the sleeve 1302 is in contact with the right end surface of the inner ring of the right deep groove ball bearing 1304; the right end face of the sleeve 1302 is in contact with the left end face of the adjusting nut 1301; the adjusting nut 1301 is screwed on the shaft 1308 No. 1. During installation, the fit clearance of the right deep groove ball bearing 1304 and the left deep groove ball bearing 1306 is adjusted by adjusting the position of the adjusting nut 1301 on the No. 1 shaft 1308.

Referring to fig. 1 and 2, the shaft of the torque sensor 15 is coupled to the left end of the shaft 1308 of the number 1 through the number 3 coupler 14. The detection head of the photoelectric rotating speed sensor 12 is fixed on the support frame 1 through a bracket, and the detection wheel of the photoelectric rotating speed sensor 12 is fixedly installed on the shaft 1308 No. 1. The photoelectric rotation speed sensor 12 is connected to a console 20 by an electric wire. When the detection wheel of the photoelectric rotation speed sensor 12 rotates along with the shaft 1308 of No. 1, the detection head of the photoelectric rotation speed sensor 12 obtains a reflection signal, and further obtains the rotation speed of the shaft 1308 of No. 1.

Referring to fig. 5, the right end of the shaft 1308 of the number 1 is fixedly connected with the left end of the U-shaped frame 17; an adjusting locking bolt 18 is arranged at the right end of the U-shaped frame 17; during testing, the steel tape 10 is placed in the U-shaped frame 17, and the position of the steel tape 10 in the U-shaped frame 17 is adjusted by adding a gasket between the left side of the steel tape 10 and the U-shaped frame 17, so that the symmetrical center line 1003 of the steel tape 10 is adjusted to be overlapped with the symmetrical center line of the U-shaped frame 17.

Meanwhile, the center of rotation of the adjustable steel tape 10 is coaxial with the axis of the No. 1 shaft 1308. The steel tape 10 is pressed into the U-shaped frame 17 by adjusting the locking bolt 18.

Referring to fig. 1, 2, and 5, the axis of the torque sensor 15 is coaxial with the axis of the shaft 1308 No. 1.

Referring to fig. 1, 2 and 5, when the draw hook 1002 of the steel tape 10 is pulled out, the draw hook 1002 is suddenly released after the tape is used for measuring the size. At this time, the draw hook 1002 can quickly return to the steel tape under the action of the coil spring inside the steel tape 10, and the draw hook 1002 has an impact force on the edge of the tape outlet of the steel tape 10. This impact force causes the steel tape 10 to rotate. The photoelectric rotating speed sensor 12 detects the rotating speed of the steel tape 10; the torque sensor 12 detects the torque of the steel tape 10, and then the impact force applied to the steel tape 10 can be obtained.

Second, steel tape opening device

Referring to fig. 1 and 3, the steel tape opening device includes a bracket 11 No. 1 and an opening mechanism 9. The No. 1 support 11 is fixed on the upper surface of the support frame 1 through bolts and is positioned on one side of the torque detection device; the opening mechanism 9 is fixed on the No. 1 bracket 11 through bolts.

Referring to fig. 1 and 4, the bracket 11 # 1 includes a fixing barrel 1101, a telescopic rod 1102, an upper plate 1103, a lower plate 1104 and a locking bolt 1105; the lower end of the fixed cylinder 1101 is welded with the lower plate 1104, and the axis of the fixed cylinder 1101 is vertical to the upper surface of the lower plate 1104; the lower plate 1104 is fixed at one end of the upper surface of the support frame 1 through bolts; the telescopic rod 1102 can be stretched in an inner hole of the fixed barrel 1101; the upper end of the telescopic rod 1102 is welded with the upper plate 1103, and the central line of the telescopic rod 1102 is perpendicular to the lower surface of the upper plate 1103; after the height of the extension rod 1102 is adjusted, the locking bolt 1105 is tightened to fix the extension rod 1102 to the fixed cylinder 1101.

Referring to fig. 1 and 3, the opening mechanism 9 includes an electric push rod 901, a pull pressure sensor 902 No. 1, a hinge 903 No. 1, a hinge 904 No. 2, a rotating frame 905, a tilt angle sensor 906, a lead screw 907 No. 1, a guide rod 908, a pull rod 909, a nut 910, a laser displacement sensor 911 No. 2, a left guide rod frame 912, a support 913, a stepping motor 914 No. 1, and a right guide rod frame 915.

Referring to fig. 1 and 3, the lower surface of the support 913 is fixed to the upper plate 1103 by bolts.

Referring to fig. 3, the upper right end of the support 913 is a U-shaped structure, and one end of the rotating frame 905 is hinged to the U-shaped structure at the upper right end of the support 913 through a hinge 904. The lower end of the electric push rod 901 is hinged with the step surface at the upper left end of the support 913 through a hinge; an extending shaft of the electric push rod 901 is connected with the lower end of a No. 1 pull pressure sensor 902; the upper end of the No. 1 pull pressure sensor 902 is hinged with the left end of the rotating frame 905 through a No. 1 hinge 903.

Referring to fig. 3, the tilt sensor 906 is fixed to the upper surface of the rotating frame 905 by a bolt, and is configured to detect the rotation angle of the rotating frame 905. The right guide rod frame 915 is fixed at the right end of the lower surface of the rotating frame 905 through a bolt; the left guide rod frame 912 is fixed at the left end of the lower surface of the rotating frame 905 through a bolt; two ends of the two guide rods 908 are respectively fixed on the left guide rod frame 912 and the right guide rod frame 915, and the axes of the two guide rods 908 are parallel. The No. 1 stepping motor 914 is fixed on the left side surface of the left guide rod frame 912 through a bolt; the left end of the No. 1 lead screw 907 is connected with the motor shaft of the No. 1 stepping motor 914 through a coupler, and the axis of the No. 1 lead screw 907 is parallel to the axes of the two guide rods 908. Through holes are formed in the two sides of the nut 910 and are used for penetrating through the optical axis sections of the two guide rods 908 respectively, and the through holes and the optical axis sections are in clearance fit; the middle of the nut 910 is provided with a threaded hole for screwing the threaded section of the No. 1 lead screw 907. The axes of the two guide rods 908 are perpendicular to the axis of the shaft 1308 number 1.

Referring to fig. 3, the left end of the pull rod 909 is fixed on the lower surface of the nut 910; the right end of the pull rod 909 is of a V-shaped configuration, and the lower surface of the V-shaped configuration contacts the lock switch 1001 of the steel tape measure 10. The No. 2 laser displacement sensor 911 is fixed on the front side surface of the right guide rod frame 915 through a bolt, the No. 2 laser displacement sensor 911 transmits a signal to the surface A916 of the pull rod 909, the signal is reflected back to the No. 2 laser displacement sensor 911, and then the No. 2 laser displacement sensor 911 obtains the displacement of the pull rod 909.

Referring to fig. 3, in operation, when the stepping motor 914 No. 1 rotates, the screw 907 No. 1, the nut 910 and the pull rod 909 drive the locking switch 1001 to operate, so as to loosen the blade of the steel tape 10. When the stepping motor 914 No. 1 rotates reversely, the locking switch 1001 is driven to act through the lead screw 907 No. 1, the nut 910 and the pull rod 909, so that the body of the steel tape 10 is locked.

Referring to fig. 3, when the extending shaft of the electric push rod 901 extends, the rotating frame 905 drives the pull rod 909 to rotate clockwise, so that the lower surface of the pull rod 909 contacts the locking switch 1001; when the extending shaft of the electric push rod 901 retracts, the rotating frame 905 drives the pull rod 909 to rotate anticlockwise, so that the pull rod 909 is far away from the locking switch 1001.

The No. 1 pull pressure sensor 902 is wired to the console 20. The tilt sensor 906 is electrically connected to the console 20. The No. 2 laser displacement sensor 911 is connected with the console 20 through an electric wire. The No. 1 stepping motor 914 is connected to the console 20 by an electric wire. The electric push rod 901 is connected with the console 20 through an electric wire.

Three, pull rule device

Referring to fig. 1, 6, 7 and 8, the pull rule device includes a guide rail 2, a pull rule mechanism 3, a rack 4, a laser speed sensor 5 and a laser displacement sensor No. 18.

Referring to fig. 1, 6, 7, 8, and 9, the pull rule mechanism 3 includes a pull plate 301, a press buckle 302, a No. 2 stepping motor 303, a No. 2 pull pressure sensor 304, a traveling frame 305, a vertical adjusting shaft 306, a No. 3 stepping motor 307, a No. 4 stepping motor 308, a gear 309, a No. 1 coupling 310, an upper nut 311, a double-headed screw 312, a lower nut 313, a lower adjusting rod 314, a lower adjusting plate 315, a No. 1 belt pulley 316, a belt 317, a No. 5 stepping motor 318, an upper adjusting rod 319, a No. 2 coupling 320, a vertical adjusting nut 321, a No. 2 screw 322, a No. 1 base 323, a slider 324, a No. 2 base 325, a No. 2 guide plate 326, a No. 1 guide plate 327, a connecting rod 328, a pull rule guide plate holder 329, a rotating shaft 330, and a No. 2 belt pulley 331.

Referring to fig. 1 and 6, the guide rail 2 is fixed on the upper surface of the support frame 1 by bolts. The sliding block 324 is installed in cooperation with the guide rail 2, and the sliding block 324 slides on the guide rail 2; the rack 4 is fixed on the upper surface of the support frame 1 through bolts. The central line of the rack 4 is parallel to the central axis of the guide rail 2. The axes of the rack 4 and the guide rail 2 are perpendicular to the axis of the shaft 1308 No. 1.

Referring to fig. 6, the No. 4 stepping motor 308 is fixed on the upper surface of the right side of the slider 324 by bolts; the gear 309 is fixedly installed on a motor shaft of the No. 4 stepping motor 308, and an axis of the motor shaft of the No. 4 stepping motor 308 is perpendicular to a center line of the rack 4. The No. 4 stepping motor 308 is connected to the console 20 by an electric wire.

The walking frame 305 is fixed on the upper surface of the left side of the sliding block 324 through a bolt;

referring to fig. 1 and 6, the gear 309 is engaged with the rack 4;

referring to fig. 6 and 8, the No. 3 stepping motor 307 is fixed on the upper surface of the walking frame 305 by bolts; the upper end of the No. 2 lead screw 322 is connected with a motor shaft of the No. 3 stepping motor 307 through a No. 2 coupler 320; the lower end of the No. 2 lead screw 322 is in clearance fit with the hole of the No. 1 base 323. The No. 1 base 323 is fixed on the lower bottom surface of the cavity of the walking frame 305; the motor axis of the No. 3 stepping motor 307 is coaxial with the axis of the No. 2 lead screw 322. The No. 3 stepping motor 307 is connected to the console 20 by an electric wire.

Referring to fig. 6 and 8, a threaded hole matched with the number 2 lead screw 322 is formed at the right end of the vertical adjusting shaft 306. The axial lead of the vertical adjusting shaft 306 is perpendicular to the axial lead of the No. 2 lead screw 322.

Referring to fig. 6 and 8, the No. 2 guide plate 326 is fixed to the left end surface of the traveling frame 305 by bolts. The middle of the No. 2 guide plate 326 is provided with a strip hole for penetrating through the vertical adjusting shaft 306, and the vertical adjusting shaft 306 is in clearance fit with the strip hole of the No. 2 guide plate 326, namely, the vertical adjusting shaft 306 can slide in the strip hole of the No. 2 guide plate 326.

Referring to fig. 6, 7 and 8, the left end of the vertical adjusting shaft 306 is coupled to the right end of the No. 2 pull pressure sensor 304 through a screw thread. The left end of the No. 2 pull pressure sensor 304 is connected with the right end of the connecting rod 328. The No. 2 pull pressure sensor 304 is used for detecting the pull force value of the pull plate 301 on the steel tape body. The left end of the connecting rod 328 is fixed on the right end surface of the pull rule frame 329 through a bolt. The upper surface of the pull rule frame 329 is perpendicular to the right end surface. The No. 2 pull pressure sensor 304 is electrically connected to the console 20.

Referring to fig. 7, the No. 2 stepping motor 303 is fixed to the upper end surface of the scale frame 329 by bolts. The No. 2 stepping motor 303 is connected to the console 20 by an electric wire.

Referring to fig. 1 and 7, the upper end of the double-headed lead screw 312 is connected with a No. 2 stepping motor 303 through a No. 1 coupler 310. The lower end of the double-head lead screw 312 is in clearance fit with the inner hole of the No. 2 base 325. The upper section of the double-head screw 312 is a right-handed thread, and the lower section is a left-handed thread. The No. 2 base 325 is fixed on the bottom surface of the inner cavity of the pull rule frame 329 through bolts. The axis of the double-end lead screw 312 is coaxial with the motor axis of the No. 2 stepping motor 303. The threaded hole at the right end of the upper adjusting rod 319 is sleeved on the right-handed thread section of the double-ended lead screw 312. The axis of the upper adjustment rod 319 is perpendicular to the axis of the double-ended lead screw 312. The press button 302 is fixed to the left end of the upper adjustment rod 319. The lower surface of the press button 302 is coplanar with the axis of the upper adjustment rod 319 and perpendicular to the axis of the double-ended lead screw 312. The threaded hole at the right end of the lower adjusting rod 314 is sleeved on the left-handed thread section of the double-ended lead screw 312. The right end of the lower adjustment plate 315 is fixed to the left end of the lower adjustment lever 314. The axis of the lower adjustment rod 314 is perpendicular to the axis of the double-ended lead screw 312. The No. 1 guide plate 327 is fixed on the left end face of the pull rule frame 329 through bolts. The number 1 guide plate 327 has a long hole with a vertical center line in the middle, and the long hole is used for passing through the upper adjusting rod 319 and the lower adjusting rod 314. The upper adjusting rod 319 is in clearance fit with the strip hole of the No. 1 guide plate 327; the lower adjustment rod 314 is a clearance fit with the elongated hole of guide plate 327 # 1. The upper surface of the lower adjustment plate 315 is coplanar with the axis of the lower adjustment rod 314 and perpendicular to the axis of the double-ended lead screw 312.

Referring to fig. 7, the No. 5 stepping motor 318 is fixed to the lower surface of the lower adjustment plate 315 by bolts.

Referring to fig. 7 and 9, one end of the pulling plate 301 is fixedly connected to the rotating shaft 330; the rotating shaft 330 is in clearance fit with the hole at the left end of the lower adjusting plate 315, that is, the rotating shaft 330 can rotate in the hole at the left end of the lower adjusting plate 315. The No. 1 belt pulley 316 is fixedly arranged at one end of the rotating shaft 330.

Referring to fig. 6, 7 and 9, the No. 5 stepping motor 318 is fixed to the lower surface of the lower adjustment plate 315 by bolts; the axis of the motor shaft of the No. 5 stepping motor 318 is parallel to the axis of the rotating shaft 330; and a No. 2 belt pulley 331 is arranged on a motor shaft of the No. 5 stepping motor 318. The belt 317 is sleeved on the No. 1 belt pulley 316 and the No. 2 belt pulley 331. The No. 5 stepping motor 318 is electrically connected to the console 20.

Referring to fig. 6 and 7, when the stepping motor 5 318 drives the pulling plate 301 to rotate clockwise to the vertical state through the belt pulley 2 331, the belt 317 and the belt pulley 1 316, the left end of the pressing buckle 302 is 1-3mm longer than the pulling plate 301 in the horizontal direction.

Referring to fig. 1, 6 and 7, when the pulling plate 301 is installed, the central line 3161 of the pulling plate 301 and the symmetrical central line of the U-shaped frame 17 are in the same vertical plane.

Referring to fig. 1, the laser speed sensor 5 and the laser displacement sensor No. 18 are mounted at one end of the guide rail 2. And the laser speed sensor 5 and the No. 1 laser displacement sensor 8 are respectively connected with the console 20 through electric wires. The axes of the laser speed sensor 5 and the laser displacement sensor No. 18 are parallel to the axis of the guide rail 2. The laser speed sensor 5 transmits a signal to the left end surface of the traveling frame 305, and receives a reflected signal, thereby obtaining a speed value of the traveling frame 305. The No. 1 laser displacement sensor 8 transmits a signal to the left end surface of the traveling frame 305, and receives a reflected signal, thereby obtaining a displacement value of the traveling frame 305.

The No. 2 pull pressure sensor 304 is used for detecting the pull force value of the pull plate 301 on the blade of the steel tape 10.

Fourth, steel tape backrush speed detection device

Referring to fig. 1, the steel tape rewinding speed detecting device comprises a photoelectric sensor No. 16, a photoelectric sensor No. 2 and a photoelectric sensor support 19. The photoelectric sensor support 19 is fixed on the upper surface of the support frame 1 through bolts, and the No. 1 photoelectric sensor 6 and the No. 2 photoelectric sensor 7 are fixed on the photoelectric sensor support 19 through bolts. The axial lines of the photoelectric sensors No. 1 and No. 27 are in the same vertical plane with the symmetrical center line 1701 of the U-shaped frame 17. The axis of the photoelectric sensor No. 16 and the axis of the photoelectric sensor No. 2 are parallel and perpendicular to the axis of the shaft No. 1 1308. The No. 1 photoelectric sensor 6 and the No. 2 photoelectric sensor 7 are respectively in electric wire connection with the console 20. The emitting device of the photoelectric sensor 6 No. 1 sends out a signal to detect whether a ruler head exists or not, and the receiving device of the photoelectric sensor 6 No. 1 receives a reflected signal. The emitting device of the No. 2 photoelectric sensor 7 sends out signals to detect whether the ruler head is available or not, and the receiving device of the No. 2 photoelectric sensor 7 receives the reflected signals and records time.

Referring to fig. 1, 7 and 10, during detection, when the pulling plate 301 rotates counterclockwise, the tape head 1002 is separated from the pulling plate 301, the pulling plate 301 moves towards the inside of the steel tape 10 under the action of the spring inside the steel tape 10, and when the tape head 1002 passes through the detection point a of the photoelectric sensor No. 1 and the detection point B of the photoelectric sensor No. 2 respectively, the photoelectric sensor No. 1 and the photoelectric sensor No. 2 detect that the tape head 1002 passes through the time interval t between the point a and the point B respectively. If the distance L between the detection point a of the photoelectric sensor No. 16 and the detection point B of the photoelectric sensor No. 2 is known, the speed of the tape head 1002 is the distance L divided by the time t.

The working principle of the steel tape reliability testing device is as follows:

firstly, the installation parts are described according to the above specific embodiment, so that the axis of the torque sensor 15 and the axis of the shaft 1308 1 are coaxial, the axes of the two guide rods 908 are perpendicular to the axis of the shaft 1308 1, the axes of the rack 4 and the guide rail 2 are perpendicular to the axis of the shaft 1308 1, the central line 3161 of the pulling plate 301 and the symmetrical central line of the U-shaped frame 17 are in the same vertical plane, the axes of the laser speed sensor 5 and the laser displacement sensor 8 1 are parallel to the axis of the guide rail 2, the axes of the photoelectric sensors 6 and 7 1 and the symmetrical central line 1701 of the U-shaped frame 17 are in the same vertical plane, and the axis of the photoelectric sensor 6 and the axis of the photoelectric sensor 7 2 are parallel and perpendicular to the axis of the shaft 1308 1.

Next, the adjustment is made so that the symmetrical centerline 1003 of the steel tape 10 coincides with the symmetrical centerline of the U-shaped frame 17.

Then, relevant parameters such as the drawing frequency, the drawing speed, the drawing length and the like of the steel tape head are set through the control interface of the control console 20, and a reliability test is started. In the test process, the arranged sensors for tension, speed, displacement and the like transmit relevant signals back to the control console in real time and control corresponding actions of the stepping motor or the electric push rod and the like, closed-loop control is realized, and relevant test data are stored at the same time, so that a basis is provided for subsequent reliability analysis.

The embodiments of the present invention are described in order to facilitate those skilled in the art to understand and apply the present invention, and the present invention is only an optimized embodiment or a preferred embodiment, so the present invention is not limited to the description of the embodiment. If the related technical personnel make equivalent structural changes or various modifications without creative efforts while adhering to the basic technical solution of the present invention, the protection scope of the present invention is covered.