阅读说明：本技术 自动式无级对中夹紧装置 (Automatic stepless centering and clamping device ) 是由 卜凡送 任玉树 徐建 杜望 于 2021-09-27 设计创作，主要内容包括：本发明属于夹持工装技术领域,具体涉及一种自动式无级对中夹紧装置,包括左连接箱体和右连接箱体,左连接箱体的底部和右连接箱体的底部均与直线传动装置连接；左连接箱体和右连接箱体彼此面对面的一侧均设有用于配合夹持工件的夹爪装置,夹爪装置包括驱动元件Ⅱ、固定式溜板、可调式溜板和夹紧头,驱动元件Ⅱ通过双输出式减速机分别与左旋丝杠Ⅱ和右旋丝杠Ⅱ传动连接,左旋丝杠Ⅱ通过左旋螺母Ⅱ与固定式溜板传动连接,右旋丝杠Ⅱ通过右旋螺母Ⅱ与可调式溜板传动连接,固定式溜板和可调式溜板还与滑道滑动连接；固定式溜板和可调式溜板上各设置有一个夹紧头。本申请可以对不同法兰圆孔的孔距,不同厚度的工件实现无级调节夹紧,适用范围广。(The invention belongs to the technical field of clamping tools, and particularly relates to an automatic stepless centering and clamping device which comprises a left connecting box body and a right connecting box body, wherein the bottom of the left connecting box body and the bottom of the right connecting box body are both connected with a linear transmission device; the clamping jaw devices used for clamping workpieces in a matched mode are arranged on one sides, facing each other, of the left connecting box body and the right connecting box body, each clamping jaw device comprises a driving element II, a fixed slide carriage, an adjustable slide carriage and a clamping head, the driving element II is in transmission connection with a left-handed screw II and a right-handed screw II through double-output speed reducers respectively, the left-handed screw II is in transmission connection with the fixed slide carriage through a left-handed nut II, the right-handed screw II is in transmission connection with the adjustable slide carriage through a right-handed nut II, and the fixed slide carriage and the adjustable slide carriage are further in sliding connection with a slide way; the fixed slide carriage and the adjustable slide carriage are respectively provided with a clamping head. This application can be to the pitch-row of different flange round holes, and the work piece of different thickness realizes that infinitely variable control presss from both sides tightly, and application scope is wide.)

1. An automatic stepless centering clamping device, its characterized in that: the device comprises a left connecting box body (12) and a right connecting box body (11), wherein the bottom of the left connecting box body (12) and the bottom of the right connecting box body (11) are connected with a linear transmission device; one sides of the left connecting box body (12) and the right connecting box body (11) facing each other are provided with clamping jaw devices used for clamping workpieces in a matched mode, each clamping jaw device comprises a driving element II (14), a fixed slide carriage (20), an adjustable slide carriage (21) and a clamping head, the driving element II (14) is in transmission connection with a left-handed screw II (16) and a right-handed screw II (17) through a double-output type speed reducer (15), the left-handed screw II (16) is in transmission connection with the fixed slide carriage (20) through a left-handed nut II (18), the right-handed screw II (17) is in transmission connection with the adjustable slide carriage (21) through a right-handed nut II (19), and the fixed slide carriage (20) and the adjustable slide carriage (21) are further in sliding connection with a slide way; the fixed slide carriage (20) and the adjustable slide carriage (21) are respectively provided with a clamping head.

2. The automatic stepless centering and clamping device according to claim 1, characterized in that: press from both sides tight head and include casing (27), press from both sides tight conical head (22), guiding axle (23), spring (24) and sleeve (26), guiding axle (23) are many step shafts, and guiding axle (23) are passed sleeve (26) of fixing on casing (27) by the outside of casing (27) and are extended the inside of casing (27), and guiding axle (23) that are located the casing (27) outside with press from both sides tight conical head (22) swing joint, spring (24) suit is on guiding axle (23), and spring (24) clamp between the shoulder of guiding axle (23) and the shoulder of sleeve (26), be located and be equipped with on guiding axle (23) of casing (27) inboard and carry out axial spacing lock nut (28) to guiding axle (23).

3. The automatic stepless centering and clamping device according to claim 2, characterized in that: a detection switch (25) which triggers a signal by the displacement of the guide shaft (23) is arranged in the shell (27).

4. The automatic stepless centering and clamping device according to claim 1, characterized in that: the adjustable slide carriage (21) is provided with a slide rail, and the clamping head is connected with the slide rail on the adjustable slide carriage (21) in a sliding way.

5. The automatic stepless centering and clamping device according to claim 1, characterized in that: the linear transmission device comprises a left-handed screw I (2), a right-handed screw I (3) and a transmission shaft (6), two ends of the transmission shaft (6) are in transmission connection with the left-handed screw I (2) and the right-handed screw I (3) respectively through corresponding couplers (5), the left-handed screw I (2) is in transmission connection with a driving element I (1), a left-handed nut I (7) on the left-handed screw I (2) is in transmission connection with a slide carriage I (9), a right connecting box body (11) is fixed on the slide carriage I (9), a right-handed nut I (8) on the right-handed screw I (3) is in transmission connection with a slide carriage II (10), and a left connecting box body (12) is fixed on the slide carriage II (10); the slide carriage I (9) and the slide carriage II (10) are also connected on the guide rail in a sliding way.

6. The automatic stepless centering and clamping device according to claim 1, characterized in that: the right-handed screw I (3) is far away from one end of the transmission shaft (6) and is connected with an encoder (4).

7. The automatic stepless centering and clamping device according to claim 1, characterized in that: and one sides of the left connecting box body (12) and the right connecting box body (11) which face each other are respectively provided with a rotary table (29) driven by a driving element III to rotate circumferentially, and the corresponding clamping jaw devices are arranged on the rotary tables (29) matched with the clamping jaw devices.

Technical Field

The invention belongs to the technical field of clamping tools, and particularly relates to an automatic stepless centering and clamping device.

Background

Aiming at a workpiece containing a plurality of groups of flange circular holes, a device for positioning and clamping the workpiece is needed under the conditions of welding or assembling and the like. At present, the common tool clamp has the following defects: manual adjustment and low adaptability.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides an automatic stepless centering and clamping device which is suitable for clamping and positioning workpieces containing multiple groups of flange circular holes with different thicknesses and different diameters and has a wide application range.

The invention is realized by the following technical scheme: an automatic stepless centering and clamping device comprises a left connecting box body and a right connecting box body, wherein the bottom of the left connecting box body and the bottom of the right connecting box body are both connected with a linear transmission device; the clamping jaw devices used for clamping workpieces in a matched mode are arranged on one sides, facing each other, of the left connecting box body and the right connecting box body, each clamping jaw device comprises a driving element II, a fixed slide carriage, an adjustable slide carriage and a clamping head, the driving element II is in transmission connection with a left-handed screw II and a right-handed screw II through double-output speed reducers respectively, the left-handed screw II is in transmission connection with the fixed slide carriage through a left-handed nut II, the right-handed screw II is in transmission connection with the adjustable slide carriage through a right-handed nut II, and the fixed slide carriage and the adjustable slide carriage are further in sliding connection with a slide way; the fixed slide carriage and the adjustable slide carriage are respectively provided with a clamping head.

Further, press from both sides tight head and include the casing, press from both sides tight conical head, guiding axle, spring and sleeve, the guiding axle is many step shafts, and the guiding axle passes the sleeve of fixing on the casing by the outside of casing and extends the inside of casing, is located the guiding axle in the casing outside and presss from both sides tight conical head swing joint, and the spring suit is on the guiding axle, and the spring clamp at the guiding axle the shoulder and with telescopic shaft shoulder between, be located to be equipped with on the guiding axle of casing inboard and carry out axial spacing lock nut to the guiding axle.

Further, a detection switch which triggers a signal by the displacement of the guide shaft is arranged in the shell.

Furthermore, a sliding rail is arranged on the adjustable slide carriage, and the clamping head is connected with the sliding rail on the adjustable slide carriage in a sliding manner.

Furthermore, the linear transmission device comprises a left-handed screw I, a right-handed screw I and a transmission shaft, two ends of the transmission shaft are respectively in transmission connection with the left-handed screw I and the right-handed screw I through corresponding couplers, the left-handed screw I is in transmission connection with a driving element I, a left-handed nut I on the left-handed screw I is in transmission connection with a slide carriage I, a right connecting box body is fixed on the slide carriage I, a right-handed nut I on the right-handed screw I is in transmission connection with a slide carriage II, and a left connecting box body is fixed on the slide carriage II; the slide carriage I and the slide carriage II are further connected to the guide rail in a sliding mode.

Furthermore, one end, far away from the transmission shaft, of the right-handed screw I is connected with an encoder.

Furthermore, the side, facing each other, of the left connecting box body and the right connecting box body are respectively provided with a rotary table driven by a driving element III to rotate circumferentially, and the corresponding clamping jaw devices are arranged on the rotary tables matched with the clamping jaw devices.

The invention has the beneficial effects that: to the work piece of multiunit flange round hole, this application can be to the pitch-row of different flange round holes, and the work piece of different thickness realizes that infinitely variable control presss from both sides tightly, and application scope is wide. Simultaneously, the lead screw and the nut of this application cooperate and to realize mechanical auto-lock, press from both sides tight safe and reliable.

Drawings

FIG. 1 is a structural cross-sectional view of the present invention;

FIG. 2 is a schematic view of the jaw apparatus of the present invention;

FIG. 3 is a partial schematic view of FIG. 2;

FIG. 4 is a perspective view of the present invention;

in the figure, 1, driving elements I and 2, left-handed screws I and 3, right-handed screws I and 4, encoders, 5, couplers, 6, transmission shafts, 7, left-handed nuts I and 8, right-handed nuts I and 9, slide carriages I and 10, slide carriages II and 11, right connecting boxes, 12, left connecting boxes, 13, connecting frames, 14, driving elements II and 15, double-output speed reducers, 16, left-handed screws II and 17, right-handed screws II and 18, left-handed nuts II and 19, right-handed nuts II and 20, fixed slide carriages, 21, adjustable slide carriages, 22, clamping cones, 23, guide shafts, 24, springs, 25, detection switches, 26, sleeves, 27, shells, 28, locking nuts, 29 and turntables.

Detailed Description

The invention is further illustrated below with reference to the figures and examples.

As shown in FIGS. 1 and 4, an automatic stepless centering and clamping device comprises a left connecting box 12 and a right connecting box 11, wherein the bottom of the left connecting box 12 and the bottom of the right connecting box 11 are both connected with a linear transmission device. Linear transmission includes levogyration lead screw I2, dextrorotation lead screw I3 and transmission shaft 6, and levogyration lead screw I2 is located the one end in the stepless centering clamping device outside and is connected with drive element I1 transmission, and drive element I1 can select for use hydraulic motor. The one end that drive element I1 was kept away from to levogyration lead screw I2 then is connected with the transmission of transmission shaft 6 through shaft coupling 5, and the one end that levogyration lead screw I2 was kept away from to transmission shaft 6 then is connected with dextrorotation lead screw I3 transmission through another shaft coupling 5. Levogyration lead screw I2 constitutes screw drive assembly with levogyration nut I7, levogyration nut I7's upper end and carriage apron I9 fixed connection, levogyration lead screw I2's both sides still are equipped with the guide rail, carriage apron I9 is sliding connection on the guide rail still, levogyration lead screw I2, levogyration nut I7 constitutes linear drive assembly with the guide rail, the rotation through levogyration lead screw I2 drives levogyration nut I7 action and then drives carriage apron I9 motion, carriage apron I9 is linear motion under the restriction of guide rail. Dextrorotation lead screw I3 constitutes screw drive assembly with dextrorotation nut I8, dextrorotation nut I8's upper end and II 10 fixed connection of carriage apron, dextrorotation lead screw I3's both sides still are equipped with the guide rail, carriage apron II 10 and guide rail sliding connection, dextrorotation lead screw I3, dextrorotation nut I8 and guide rail constitute linear drive assembly, the rotation through dextrorotation lead screw I3 drives dextrorotation nut I8 and moves and then drive II 10 motions of carriage apron, carriage apron II 10 is linear motion under the restriction of guide rail. Preferably, the carriage I9 and the carriage II 10 are slidably connected to the same set of guide rails. The right connecting box body 11 is fixed on the slide carriage I9, and the left connecting box body 12 is fixed on the slide carriage II 10; when the left-handed lead screw I2 is driven to rotate by the driving element I1, the left-handed lead screw I2 drives the right-handed lead screw I3 to rotate through the transmission shaft 6, and the left-handed lead screw I2 and the right-handed lead screw I3 rotate in opposite directions, so that the left-handed nut I7 and the right-handed nut I8 move in opposite directions or move away from each other (the left-handed nut I7 and the right-handed nut I8 move away from each other) simultaneously when moving, and the slide carriage I9 and the slide carriage II 10 realize simultaneous opposite movement or simultaneous opposite movement of the right connecting box body 11 and the left connecting box body 12. For the purpose of realizing the simultaneous opposite movement or the simultaneous opposite movement of the right connection box 11 and the left connection box 12, a set of linear moving devices may be respectively disposed on the right connection box 11 and the left connection box 12 to control the right connection box 11 and the left connection box 12 to realize the above movement. The screw rod and the nut are matched to form mechanical self-locking.

As shown in fig. 1 to 4, the side of the left connecting box 12 facing the side of the right connecting box 11 is provided with a clamping jaw device for clamping a workpiece in a matching manner, and the clamping jaw device is arranged on the connecting frame 13 and fixed with the corresponding connecting box through the connecting frame 13. The clamping jaw device comprises a driving element II 14, a fixed slide carriage 20, an adjustable slide carriage 21 and a clamping head. The driving element II 14 can adopt a servo motor, the driving element II 14 is in transmission connection with a double-output speed reducer 15, and the double-output speed reducer 15 is in transmission connection with a left-handed screw II 16 and a right-handed screw II 17 respectively. Levogyration lead screw II 16 is connected with fixed carriage apron 20 transmission through levogyration nut II 18, dextrorotation lead screw II 17 is connected with adjustable carriage apron 21 transmission through dextrorotation nut II 19, fixed carriage apron 20 and adjustable carriage apron 21 still with slide sliding connection, because the restriction of slide makes levogyration lead screw II 16 when rotating, drive fixed carriage apron 20 through levogyration nut II 18 and be rectilinear motion, simultaneously, when the restriction of slide makes dextrorotation lead screw II 17 rotate, drive adjustable carriage apron 21 through dextrorotation nut II 19 and be rectilinear motion. The driving element II 14 drives the double-output speed reducer 15, the double-output speed reducer 15 transmits power to the left-handed screw II 16 and the right-handed screw II 17, and the fixed slide carriage 20 and the adjustable slide carriage 21 can move in the same direction or move back to back by the rotation of the left-handed screw II 16 and the rotation of the right-handed screw II 17. The fixed carriage plate 20 and the adjustable carriage plate 21 are respectively provided with a clamping head. Specifically, the clamping head comprises a shell 27, a clamping conical head 22, a guide shaft 23, a spring 24 and a sleeve 26, wherein the guide shaft 23 is a multi-step shaft, the guide shaft 23 penetrates through the sleeve 26 fixed on the shell 27 from the outer side of the shell 27 to extend into the shell 27, the guide shaft 23 positioned on the outer side of the shell 27 is connected with the clamping conical head 22 through a screw, the spring 24 is sleeved on the guide shaft 23, the spring 24 is clamped between a shaft shoulder of the guide shaft 23 and a shaft shoulder of the sleeve 26, and a locking nut 28 for axially limiting the guide shaft 23 is arranged on the guide shaft 23 positioned on the inner side of the shell 27. When the clamping cone head 22 contacts the flange circular hole of the workpiece, the clamping cone head is pressed to press the spring 24 towards the shell 27 through the shaft shoulder of the guide shaft 23, and then the guide shaft 23 overcomes the elastic force of the spring 24 to move towards the shell 27 and carries the clamping cone head 22 to act together. After the clamping cone head 22 is separated from the flange round hole of the workpiece, the guide shaft 23 carries the clamping cone head 22 to return to the initial position under the action of the spring 24. The conical configuration of the clamping cone 22 can be used to accommodate different sized flange holes in a workpiece.

The flow of the automatic stepless centering and clamping device for clamping the workpiece is as follows: the center distance of two flange circular holes of a clamped workpiece is measured in advance, according to the obtained data, the driving element II 14 drives the double-output type speed reducer 15 to drive the left-handed screw II 16 and the right-handed screw II 17 to rotate, and then the fixed slide carriage 20 and the adjustable slide carriage 21 are driven to adjust the distance between the two clamping heads (namely, the distance between the clamping conical head 22 on the fixed slide carriage 20 and the clamping conical head 22 on the adjustable slide carriage 21) through the opposite movement or the back-to-back movement of the left-handed nut II 18 and the right-handed nut II 19 so as to adapt to the flange circular holes with different positions on different workpieces. After the distance adjustment is completed, the workpiece is hoisted between the right connecting box body 11 and the left connecting box body 12 (if the distance between the right connecting box body 11 and the left connecting box body 12 is insufficient, the left-handed screw I2 is driven by the driving element I1 in advance, so that the distance between the right connecting box body 11 and the left connecting box body 12 is increased by back-to-back movement of the left-handed nut I7 and the right-handed nut I8), then the driving element I1 drives the left-handed screw I2 to rotate, the left-handed screw I2 also drives the right-handed screw I3 to rotate through the transmission shaft 6, so that the left-handed nut I7 and the right-handed nut I8 move in the same direction, then the slide carriage I9 and the slide carriage II 10 realize the simultaneous opposite movement of the right connecting box body 11 and the left connecting box body 12, and the workpiece is centered and clamped by the four clamping conical heads 22. As an improvement of the embodiment, the adjustable slide carriage 21 is provided with a slide rail, and the clamping head is connected with the slide rail on the adjustable slide carriage 21 in a sliding manner. In the clamping process, if the positions of the flange round holes of the workpieces of the same type have deviation, the conical surface of the clamping conical head 22 and the flange round hole of the workpiece are extruded to push the clamping head to automatically slide along the slide rail on the adjustable slide carriage 21, so that the distance between the clamping conical head 22 on the fixed slide carriage 20 and the clamping conical head 22 on the adjustable slide carriage 21 meets the positioning requirement.

As shown in fig. 2 and 3, a detection switch 25 for triggering a signal by the displacement of the guide shaft 23 is arranged in the housing 27, and in the process of positioning the workpiece, when the guide shaft 23 is displaced to a certain distance, the detection switch 25 detects the guide shaft 23, and the workpiece can be considered to have been positioned.

As shown in FIG. 1, one end of the right-handed lead screw I3, which is far away from the transmission shaft 6, is connected with an encoder 4. The encoder 4 feeds back the number of turns of the right-handed lead screw I3 to the control system, the control system calculates the movement distance between the right connecting box body 11 and the left connecting box body 12, and a technician judges whether the workpiece is clamped or not according to the movement distance.

As shown in fig. 4, the sides of the left and right connecting boxes 12 and 11 facing each other are provided with a rotary table 29 driven by the driving element iii to rotate circularly, and the corresponding clamping jaw device is arranged on the rotary table 29 matched with the clamping jaw device. The angle of the clamping jaw device can be adjusted by rotating the turntable 29, so that the workpiece can be clamped at multiple angles, and the clamping operation is convenient.

To the work piece of multiunit flange round hole, this application can be to the pitch-row of different flange round holes, and the work piece of different thickness realizes that infinitely variable control presss from both sides tightly, and application scope is wide. Simultaneously, the lead screw and the nut of this application cooperate and to realize mechanical auto-lock, press from both sides tight safe and reliable.