阅读说明：本技术 一种高精度多楔槽皮带轮快速测量仪 (High-precision quick measuring instrument for poly-wedge groove belt pulley ) 是由 王伶俐 李金星 徐红梅 吴江华 于 2019-10-17 设计创作，主要内容包括：本发明公开了一种高精度多楔槽皮带轮快速测量仪,它涉及机械加工在线快速测量仪器技术领域。它包括升降机构、测量机构、台板、移动机构；所述升降机构通过螺母固定在台板上,所述测量机构通过螺钉固定在升降机构上,所述移动机构设在台板下方,移动机构上安装有供工件安放的定位轴,所述定位轴上方设有相应的定位座,所述定位轴穿过台板上的腰型孔连接在移动机构的上方,所述台板上设有限制定位轴的V型挡块,所述V型挡块通过螺钉固定在台板上。本发明的优点在于：能够降低人为的不稳定因素实现高精度测量,稳定性好,同时,可以减少人工工作量,实现快速测量。(The invention discloses a high-precision quick measuring instrument for a poly-wedge groove belt pulley, and relates to the technical field of machining online quick measuring instruments. The device comprises a lifting mechanism, a measuring mechanism, a bedplate and a moving mechanism; the lifting mechanism is fixed on the bedplate through a nut, the measuring mechanism is fixed on the lifting mechanism through a screw, the moving mechanism is arranged below the bedplate, a positioning shaft for placing a workpiece is arranged on the moving mechanism, a corresponding positioning seat is arranged above the positioning shaft, the positioning shaft penetrates through a waist-shaped hole in the bedplate to be connected above the moving mechanism, a V-shaped stop block for limiting the positioning shaft is arranged on the bedplate, and the V-shaped stop block is fixed on the bedplate through a screw. The invention has the advantages that: the high-precision measurement can be realized by reducing artificial unstable factors, the stability is good, meanwhile, the manual workload can be reduced, and the rapid measurement is realized.)

1. The utility model provides a high accuracy polywedge groove belt pulley rapid survey appearance which characterized in that: comprises a lifting mechanism, a measuring mechanism, a bedplate and a moving mechanism; the lifting mechanism is fixed on the bedplate through a nut, the measuring mechanism is fixed on the lifting mechanism through a screw, the moving mechanism is arranged below the bedplate, a positioning shaft for placing a workpiece is arranged on the moving mechanism, a corresponding positioning seat is arranged above the positioning shaft, the positioning shaft penetrates through a waist-shaped hole in the bedplate to be connected above the moving mechanism, a V-shaped stop block for limiting the positioning shaft is arranged on the bedplate, and the V-shaped stop block is fixed on the bedplate through a screw;

the lifting mechanism is provided with a rotating knob, a screw rod, a driving plate and a measuring mechanism mounting seat; the rotating knob is arranged at the top of the screw rod to drive the screw rod to rotate, the driving plate is matched and connected with the screw rod through a screw nut hole, the screw rod rotates to drive the driving plate to move up and down, the driving plate is locked by a locking nut, the measuring mechanism mounting seat is connected to the bottom of the driving plate through a crossed roller guide rail, and the driving plate drives the measuring mechanism mounting seat to move up and down;

the measuring mechanism comprises a shoulder plate, mounting arms, measuring arms, a measuring hand and a measuring meter, wherein the shoulder plate is mounted on a measuring mechanism mounting seat through screws, the two mounting arms are transversely and slidably mounted at two ends of the shoulder plate, the shoulder plate and the mounting arms are locked through locking screws, a locking column is arranged at the top of the end part of each locking screw to lock the mounting arms, the measuring arms are arranged in the radial direction of the end part of each mounting arm, the peripheries of the measuring arms penetrate through the inside of the measuring arms through sheaths, the measuring arms and the sheaths are locked through the locking screws, one end of each measuring arm, which is positioned on the inner side of the mounting arm, is connected with the measuring hand, one end of one measuring arm, which is positioned on the outer side of the mounting arm, is connected with the measuring meter;

the inside of the measuring hand is provided with a top finger, the measuring arm and the top finger clamp the measuring hand, the measuring arm and the top finger are connected together through a connecting screw, a rotating gap is formed between the measuring hand and the top finger, a measuring rod is arranged between the end parts of the measuring hand, a pull rope penetrates through the measuring rod, the pull rope is tightly wound on the measuring hand, the pull rope is extruded on the measuring hand through a screw, and the diameter of the pull rope is smaller than the inner aperture of the measuring rod;

the moving mechanism is provided with a driving and reversing guide rail, a supporting plate, a lifting mounting plate, a lifting guide rail sliding seat, a hand wheel and a cam; the utility model discloses a lifting guide rail, including layer board, lifting guide rail, cam and hand wheel, advance and retreat guide rail establishes at the layer board top, the vertical outside that sets up at the layer board both ends of lifting mounting panel, and the inboard of lifting mounting panel is equipped with lifting guide rail, be equipped with corresponding lifting guide rail slide on the lifting guide rail, be connected through the chain connection board between layer board and the lifting guide rail slide, lifting guide rail slide drives the layer board and reciprocates the regulation on lifting guide rail, the bottom of layer board is equipped with the cam, and the cam runs through by the connecting axle with the hand wheel, the connecting axle passes through the axle bed and supports, be equipped with corresponding advance and retreat guide rail slide on.

2. The high-precision quick measuring instrument for the poly-wedge groove pulley according to claim 1, wherein: the screw rod is installed on the cross rod, two ends of the cross rod are installed on the bedplate through guide pillars, the guide pillars are fixed with the bedplate through nuts, the guide pillars are arranged inside the driving plate in a penetrating mode through linear bearings and bearing seats, and the bearing seats are installed on the driving plate.

3. The high-precision quick measuring instrument for the poly-wedge groove pulley according to claim 1, wherein: and a swinging force spring and an adjustable swinging force screw are arranged on the side edge of the measuring mechanism mounting seat.

4. The high-precision quick measuring instrument for the poly-wedge groove pulley according to claim 1, wherein: the measuring rod is provided with a gap between the axial direction of the stay cord and the measuring hand, a gap between the radial direction and the top finger, the measuring rod moves between the measuring hand and the top finger, the measuring hand is in clearance fit with the top finger in the axial direction and the radial direction, the measuring hand is provided with a threaded hole, a top screw is installed in the threaded hole, and a gap is formed between the top screw and the upper plane of the top finger.

5. The high-precision quick measuring instrument for the poly-wedge groove pulley according to claim 1, wherein: the safety clamping seat is arranged at the bottom of the bedplate and connected with the bottom of the bedplate through a connecting bent plate, one surface of the safety clamping seat, close to the installation shaft seat, is provided with a tooth-shaped profile concave tooth, the installation shaft seat is provided with a tooth-shaped structure corresponding to the tooth-shaped profile concave tooth of the safety clamping seat, and the tooth-shaped profile concave tooth on the safety clamping seat is the same as the groove number and the groove distance of the measured multi-wedge groove belt pulley.

Technical Field

The invention relates to the technical field of machining online rapid measuring instruments, in particular to a high-precision rapid measuring instrument for a poly-wedge groove belt pulley.

Background

The pitch diameter of the belt pulley is an important technical parameter, and the pitch diameter is a numerical value which cannot be directly measured and can only be indirectly measured through the cylindrical rods, so that two cylindrical rods are required to be clamped in grooves with opposite diameters of the belt pulley in the measurement, and the outer diameters of the two cylindrical rods are measured by using a caliper or a dial indicator to obtain an actual machining error value. The pitch diameter of the multi-wedge groove belt pulley is a plurality of grooves, so the measurement is more complicated, in addition, the conventional measuring tool is mastered by a person, a single person needs to put two cylindrical rods in the belt groove, and a ruler needs to be used for measurement, so the efficiency is obviously extremely low, the conventional measuring tool is used for measurement by a person, and the existence of artificial unstable factors is obviously caused. The high-precision quick measuring instrument for the poly-wedge groove belt pulley is required to be provided, artificial unstable factors are reduced, workload is reduced, and measuring efficiency is improved.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a high-precision quick measuring instrument for a multi-wedge groove belt pulley, which overcomes the defects in the process inspection of the belt pulley in the groove processing process, can reduce artificial unstable factors to realize high-precision measurement, has good stability, and can reduce the manual workload to realize quick measurement.

In order to solve the technical problems, the technical scheme of the invention is as follows: comprises a lifting mechanism, a measuring mechanism, a bedplate and a moving mechanism; the lifting mechanism is fixed on the bedplate through a nut, the measuring mechanism is fixed on the lifting mechanism through a screw, the moving mechanism is arranged below the bedplate, a positioning shaft for placing a workpiece is arranged on the moving mechanism, a corresponding positioning seat is arranged above the positioning shaft, the positioning shaft penetrates through a waist-shaped hole in the bedplate to be connected above the moving mechanism, a V-shaped stop block for limiting the positioning shaft is arranged on the bedplate, and the V-shaped stop block is fixed on the bedplate through a screw;

the lifting mechanism is provided with a rotating knob, a screw rod, a driving plate and a measuring mechanism mounting seat; the rotating knob is arranged at the top of the screw rod to drive the screw rod to rotate, the driving plate is matched and connected with the screw rod through a screw nut hole, the screw rod rotates to drive the driving plate to move up and down, the driving plate is locked by a locking nut, the measuring mechanism mounting seat is connected to the bottom of the driving plate through a crossed roller guide rail, and the driving plate drives the measuring mechanism mounting seat to move up and down;

the measuring mechanism comprises a shoulder plate, mounting arms, measuring arms, a measuring hand and a measuring meter, wherein the shoulder plate is mounted on a measuring mechanism mounting seat through screws, the two mounting arms are transversely and slidably mounted at two ends of the shoulder plate, the shoulder plate and the mounting arms are locked through locking screws, a locking column is arranged at the top of the end part of each locking screw to lock the mounting arms, the measuring arms are arranged in the radial direction of the end part of each mounting arm, the peripheries of the measuring arms penetrate through the inside of the measuring arms through sheaths, the measuring arms and the sheaths are locked through the locking screws, one end of each measuring arm, which is positioned on the inner side of the mounting arm, is connected with the measuring hand, one end of one measuring arm, which is positioned on the outer side of the mounting arm, is connected with the measuring meter;

the inside of the measuring hand is provided with a top finger, the measuring arm and the top finger clamp the measuring hand, the measuring arm and the top finger are connected together through a connecting screw, a rotating gap is formed between the measuring hand and the top finger, a measuring rod is arranged between the end parts of the measuring hand, a pull rope penetrates through the measuring rod, the pull rope is tightly wound on the measuring hand, the pull rope is extruded on the measuring hand through a screw, and the diameter of the pull rope is smaller than the inner aperture of the measuring rod;

the moving mechanism is provided with a driving and reversing guide rail, a supporting plate, a lifting mounting plate, a lifting guide rail sliding seat, a hand wheel and a cam; the utility model discloses a lifting guide rail, including layer board, lifting guide rail, cam and hand wheel, advance and retreat guide rail establishes at the layer board top, the vertical outside that sets up at the layer board both ends of lifting mounting panel, and the inboard of lifting mounting panel is equipped with lifting guide rail, be equipped with corresponding lifting guide rail slide on the lifting guide rail, be connected through the chain connection board between layer board and the lifting guide rail slide, lifting guide rail slide drives the layer board and reciprocates the regulation on lifting guide rail, the bottom of layer board is equipped with the cam, and the cam runs through by the connecting axle with the hand wheel, the connecting axle passes through the axle bed and supports, be equipped with corresponding advance and retreat guide rail slide on.

Furthermore, the screw rod is installed on the cross rod, two ends of the cross rod are installed on the bedplate through guide pillars, the guide pillars are fixed with the bedplate through nuts, the guide pillars are arranged inside the driving plate in a penetrating mode through linear bearings and bearing seats, and the bearing seats are installed on the driving plate.

Furthermore, a swinging force spring and an adjustable swinging force screw are arranged on the side edge of the measuring mechanism mounting seat.

Furthermore, survey the stick and survey the clearance between the hand at the axial of stay cord and survey, it is gapped between radial direction and top finger, survey the stick and survey the hand, push up the finger and move about between, survey the hand and point clearance fit between axial and radial direction and top finger, survey and be equipped with the screw hole on the hand, the downthehole top screw that installs of screw hole, be equipped with the clearance between the last plane of top screw and top finger.

Furthermore, a safety clamping seat is arranged at the bottom of the bedplate, the safety clamping seat is connected with the bottom of the bedplate through a connecting bent plate, one surface of the safety clamping seat, which is close to the installation shaft seat, is provided with a tooth-shaped profile concave tooth, the installation shaft seat is provided with a tooth-shaped structure corresponding to the tooth-shaped profile concave tooth of the safety clamping seat, and the tooth-shaped profile concave tooth on the safety clamping seat is the same as the groove number and the groove distance of the measured poly-wedge-groove belt pulley.

After adopting the structure, the invention has the advantages that:

1. the measuring rod is arranged on the measuring arm, the measuring arm is arranged on the mounting arm through the measuring arm, the two measuring rods can be placed in the belt pulley groove for measurement, the operation that two cylindrical rods are placed in the belt pulley groove manually and then the ruler is taken for measurement is replaced, the artificial unstable factors can be reduced, and the stability is good;

2. the lifting mechanism can adjust the height according to the specific specification of the belt pulley, so that the measuring arm corresponds to the position of the belt pulley, the moving mechanism can realize the advance and retreat of a workpiece to be measured and the replacement of the position of the groove to be measured, and the measuring mechanism can measure the belt pulley by putting the measuring rod into the groove of the belt pulley, thereby realizing high-precision and rapid measurement.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the measurement state of the present invention;

FIG. 3 is a schematic structural diagram of the lifting mechanism of the present invention;

FIG. 4 is a schematic view of the measuring mechanism of the present invention;

FIG. 5 is a schematic view of the structure of the measuring arm and the measuring hand of the present invention;

FIG. 6 is a schematic view of the connection between the measuring arm and the measuring gauge according to the present invention;

FIG. 7 is a cross-sectional view of a measuring arm of the present invention;

FIG. 8 is a schematic view A-A of FIG. 7;

FIG. 9 is a schematic view of C-C of FIG. 8;

FIG. 10 is a schematic view B-B of FIG. 8;

FIG. 11 is an enlarged schematic view of E of FIG. 9;

FIG. 12 is a schematic view of the moving mechanism of the present invention;

FIG. 13 is an enlarged view of C of FIG. 12;

FIG. 14 is a top view of the platen and moving mechanism of the present invention;

fig. 15 is a schematic view of fig. 14D-D.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and the detailed description. The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.

As shown in fig. 1 to 15, the following technical solutions are adopted in the present embodiment: comprises a lifting mechanism 1, a measuring mechanism 2, a moving mechanism 3 and a bedplate 4; the lifting mechanism 1 is fixed on a bedplate 4 through a nut, the measuring mechanism 2 is fixed on the lifting mechanism 1 through a screw, the moving mechanism 3 is arranged below the bedplate 4, a positioning shaft 5 for placing a workpiece 7 is arranged on the moving mechanism 3, a corresponding positioning seat is arranged above the positioning shaft 5, the workpiece 7 to be measured is placed on the positioning seat, belt pulleys of different specifications only need to be replaced by the positioning seat without one specification of equipment, the positioning shaft 5 passes through a waist-shaped hole on the bedplate 4 and is connected above the moving mechanism 3, a V-shaped stop block 6 for limiting the positioning shaft 5 is arranged on the bedplate 4, the position of the positioning shaft 5 can be limited by the V-shaped stop block 6, and the V-shaped stop block 6 is fixed on the bedplate 4 through a screw;

as shown in fig. 2, when the workpiece 7 is in a measuring state, the workpiece 7 is placed on the positioning seat and then pushed into the measuring mechanism 2, and then a pitch diameter measurement can be completed, the workpiece 7 is pulled out after the measurement, the hand wheel 36 is rotated again to enable the workpiece 7 to be measured to ascend or descend, the adjacent grooves of the multi-wedge belt pulley are continuously measured, and the whole measurement of the multi-wedge grooves is completed by the analogy;

as shown in fig. 3, the lifting mechanism 1 has a rotary knob 11, a screw rod 12, a driving plate 13, and a measuring mechanism mounting base 14; the rotary knob 11 is arranged at the top of the screw rod 12 to drive the screw rod 12 to rotate, the driving plate 13 is connected with the screw rod 12 through a screw nut hole in a matched manner, the screw rod 12 rotates to drive the driving plate 13 to move up and down, the main purpose of the rotary knob is to adjust according to the heights of different wedge groove belt wheel specifications so that the measuring arm 23 corresponds to the position of a workpiece 7, the driving plate 13 is locked by a locking nut, the measuring mechanism mounting seat 14 is connected to the bottom of the driving plate 13 through a crossed roller guide rail 15, the roller guide rail 15 enables the driving plate 13 and the measuring mechanism mounting seat 14 to move relatively at high precision, the driving plate 13 drives the measuring mechanism mounting seat 14 to move up and down at high precision, meanwhile, the measuring mechanism mounting seat 14 can horizontally swing at high precision relative to the driving plate 13, the main purpose is that the measuring mechanism 2 can swing along with the driving plate 13, and a certain pre-pressure must be provided for a multi-wedge groove belt wheel of a measured workpiece 7, the gauge 25 opposite to the measuring arm 23 also has elastic force measurement, so that two opposite axial forces can push the measuring rod 28 into the belt groove of the poly-wedge groove belt pulley for measurement;

as shown in fig. 4, the measuring mechanism 2 is composed of a shoulder plate 21, mounting arms 22, measuring arms 23, measuring hands 24 and a measuring meter 25, the shoulder plate 21 is mounted on the measuring mechanism mounting seat 14 through screws, the two mounting arms 22 are transversely slidably mounted at two ends of the shoulder plate 21, the mounting arms 22 can transversely slide on the shoulder plate 21, the distance between the two mounting arms 22 can be adjusted according to the diameter of the belt wheel, the shoulder plate 21 and the mounting arms 22 are locked through locking screws, locking columns are arranged at the end portions of the locking screws to lock the mounting arms 22, the measuring arms 23 are arranged at the end portions of the mounting arms 22 in the radial direction, the outer peripheries of the measuring arms 23 penetrate through the inner portions of the measuring arms 23 through sheaths 26, the measuring arms 23 and the sheaths 26 are locked through the locking screws, one end of the measuring arm 23 located on the inner side of the mounting arm 22 is connected with the measuring hand 24, one end of the measuring arm 23 located on the outer side of the mounting arm 22 is, the measuring arm 23 is arranged on a measuring rod of the measuring meter 25, and the measuring meter 25 can replace a required high-precision electric sensing head or a higher-precision grating length meter according to the precision requirement of the poly-wedge groove belt pulley so as to meet the requirement of different precision of the belt pulley;

as shown in fig. 5 and 6, a top finger 27 is arranged inside the measuring hand 24, the measuring arm 23 and the top finger 27 clamp the measuring hand 24 therebetween, the measuring arm 23 and the top finger 27 are connected together through a connecting screw, a rotating gap is arranged between the measuring hand 24 and the top finger 27, a measuring rod 28 is arranged between the end parts of the measuring hand 24, a pull rope 29 penetrates through the measuring rod 28, the pull rope 29 is tightly wound on the measuring hand 24, the pull rope 29 is extruded on the measuring hand 24 through a screw, and the diameter of the pull rope 29 is smaller than the inner bore diameter of the measuring rod 28;

as shown in fig. 12 to 15, the moving mechanism 3 includes an advance/retreat rail 31, a pallet 32, a lift mounting plate 33, a lift rail 34, a lift rail slider 35, a hand wheel 36, and a cam 37; the advancing and retreating guide rail 31 is arranged at the top of the supporting plate 32, the lifting mounting plate 33 is vertically arranged at the outer sides of two ends of the supporting plate 32, the lifting guide rail 34 is arranged at the inner side of the lifting mounting plate 33, a corresponding lifting guide rail sliding seat 35 is arranged on the lifting guide rail 34, the supporting plate 32 is connected with the lifting guide rail sliding seat 35 through a linking plate, the lifting guide rail sliding seat 35 drives the supporting plate 32 to move up and down on the lifting guide rail 34 for adjustment, a cam 37 is arranged at the bottom of the supporting plate 32, the cam 37 and a hand wheel 36 are penetrated through by a connecting shaft 38, the connecting shaft 38 is supported through a shaft seat 39, a corresponding advancing and retreating guide rail sliding seat 310 is arranged on the advancing and retreating guide rail sliding seat 31, an installing shaft seat 311 is arranged on the advancing;

the bottom of the bedplate 4 is provided with a safety clamping seat 312, the safety clamping seat 312 is connected with the bottom of the bedplate 4 through a connecting bent plate 313, one surface of the safety clamping seat 312, which is close to the mounting shaft seat 311, is provided with a tooth profile concave tooth, the mounting shaft seat 311 is provided with a tooth profile structure corresponding to the tooth profile concave tooth of the safety clamping seat 312, and the number and the distance of the tooth profile concave tooth on the safety clamping seat 312 are the same as those of a tested multi-wedge groove belt pulley;

the working principle of the moving mechanism 3 is as follows: the workpiece 7 poly wedge groove belt pulley is placed on the positioning seat on the positioning shaft 5, the two parts are in clearance fit without fastening, the workpiece poly wedge groove belt pulley is pushed, thereby the installation shaft seat 311 and the advancing and retreating guide rail sliding seat 310 below can be driven to slide forwards in the advancing and retreating guide rail 31 together, when the measurement position is entered, the measurement data can be read, the advancing and retreating guide rail 31 can not move up and down under the state, because the installation shaft seat 311 is structurally provided with a tooth-shaped structure corresponding to the tooth-shaped profile concave teeth of the safety clamping seat 312, when the measurement state is entered, the tooth-shaped structure simultaneously enters the tooth-shaped profile concave teeth of the safety clamping seat 312, thus the installation shaft seat 311 is restrained and can not move up and down any more, the main purpose is to protect the measuring hand 24 from being damaged by the up and down wrong movement of the workpiece poly wedge groove belt pulley, when the measurement data is read, the workpiece 7 is withdrawn, therefore, the connecting shaft 38 and the cam 37 are driven to move up and down at a fixed distance and are converted to the next groove of the workpiece poly-wedge groove belt pulley, the number and the groove distance of the tooth profile concave teeth on the safety clamping seat 312 are the same as those of the groove of the measured poly-wedge groove belt pulley, and when the tooth profile concave teeth on the safety clamping seat 312 are converted to the next groove of the workpiece poly-wedge groove belt pulley for measurement, the mounting shaft seat 311 can still be clamped to ensure the stability during measurement;

as shown in fig. 15, for the schematic diagram of the fixed distance movement of the rotating hand wheel 36, a general v-ribbed pulley is divided into 4pk, 5pk and 6pk, in the diagram, the cam 37 is designed with 6 grooves, the cam 37 is divided into six sides, the distance from each side to the center is set according to the groove distance of the pulley, for example, the minimum size from the center is set as H, the distance from the second side to the center is 2 × H, the distances from the six sides to the center and the like guarantee that the lifting distances are equal, the hand wheel 36, the connecting shaft 38 and the cam 37 are connected together by keys, the workpiece 7 can be driven to lift once the cam 37 rotates, and the middle diameter measurement of the next pulley groove can be performed.

The screw rod 12 is installed on a cross rod, two ends of the cross rod are installed on the bedplate 4 through guide pillars 16, the guide pillars 16 are fixed with the bedplate 4 through nuts, the guide pillars 16 penetrate through the inside of the driving plate 13 through linear bearings 17 and bearing seats 18, and the bearing seats 18 are installed on the driving plate 13.

The side edge of the measuring mechanism mounting seat 14 is provided with a swing spring 19 and an adjustable swing screw 110, and the swing spring 19 and the adjustable swing screw 110 can limit the middle position of the measuring mechanism mounting seat 14 on the driving plate 13 and can also adjust the swing force and the relative distance.

As shown in fig. 7-11, the design of the measuring arm 23 and the measuring hand 24 mainly allows the measuring bar 28 to be completely flexible as the human hand, the measuring bar 28 is placed in the designated position of the pulley groove along with the position of the pulley, because the v-groove pulley has certain shape and position errors in the machining process, the v-groove pulley and the positioning shaft 5 must have geometric position errors, so the measuring bar 28 is designed to be matched with the position change of the v-groove pulley, the measuring bar 28 has a gap S between the axial direction of the pull rope 29 and the measuring hand 24, and has a gap S1 between the radial direction and the top finger 27, the measuring bar 28 moves between the measuring hand 24 and the top finger 27, so the measuring bar 28 can have a certain amount of movement, when the measuring arm 23 is subjected to the axial force from the swinging force spring 19, the measuring bar 28 is pushed, and at this time, there is no gap S1 between the measuring bar 28 and the top finger 27, the measuring bar 28 is completely pressed to a measured point of the belt wheel by the top finger 27, the measuring hand 24 is matched with gaps S3 and S2 between the top finger 27 in the axial direction and the radial direction, so the measuring hand 24 can rotate around the top finger 27, if the rotating angle of the measuring hand 24 is too large and the transverse end surface of the middle diameter of the belt wheel is not parallel and has too large difference, the multi-wedge groove belt wheel can be influenced to be smoothly pushed into a measuring position and even can not reach the measuring position, and part of the measuring hand 24 is damaged, a threaded hole is arranged on the measuring hand 24, a top screw 210 is arranged in the threaded hole, a gap S is arranged between the top screw 210 and the upper plane of the top finger 27, the top screw 210 can not completely push the measuring hand 24 and the top finger 27, but a certain gap S is reserved, so that the measuring hand 24 has only a small rotating amount on the top finger 27, the design aim is to ensure that the measuring bar 28 is more flexibly attached to the measuring position, and completely achieves the same, the main purpose of designing the measuring bar 28 into a small dynamic quantity is to make the measuring bar 28 be attached in the groove of the poly-wedge groove belt pulley, and the small dynamic quantity can eliminate the inevitable errors in various aspects such as parallelism and perpendicularity caused by processing of each part.

According to the specific embodiment, the measuring rod is arranged on the measuring arm, the measuring arm is arranged on the mounting arm through the measuring arm, the two measuring rods can be placed in the belt pulley groove for measurement, the operation that two cylindrical rods are placed in the belt pulley groove manually and then the measuring rod is taken for measurement is replaced, the artificial unstable factors can be reduced, and the stability is good; the lifting mechanism can adjust the height according to the specific specification of the belt pulley, so that the measuring arm corresponds to the position of the belt pulley, the moving mechanism can realize the advance and retreat of a workpiece to be measured and the replacement of the position of a groove to be measured, the measuring mechanism can measure the belt pulley by putting the measuring rod into the groove of the belt pulley, the high-precision and quick measurement is realized, and the efficiency is about 4 times that of the original measuring method.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.