A dynamic calibration device and calibration method for pneumatic electric torque wrench

Abstract

The present invention discloses a pneumatic electric torque wrench dynamic calibration device and calibration method, which relates to the field of torque wrench detection technology, including a mounting mechanism, a dynamic calibration mechanism is arranged at the top center of the mounting mechanism, a nut and bolt carrying mechanism is arranged at the top left end of the mounting mechanism, a torque wrench carrying mechanism is arranged at the top right end of the mounting mechanism, a torque wrench limiting mechanism is arranged on the torque wrench carrying mechanism, and a pushing and pulling mechanism is arranged on the inner side of the mounting mechanism; the nut and bolt carrying mechanism carries nuts and bolts for calibration, and the torque wrench carrying mechanism carries the torque wrench to be calibrated. The present invention has a higher degree of automation, simplifies the manual operation process and reduces the difficulty of operation, which can not only improve the detection efficiency, but also be more convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of torque wrench detection, and in particular to a pneumatic electric torque wrench dynamic calibration device and a calibration method. Background Art

[0002] The torque tester is an instrument used to calibrate various manual, electric and pneumatic torque wrenches. It is an important measuring instrument for controlling product quality. Traditional pneumatic and electric torque wrench calibration methods mostly use static calibration methods, that is, the torque wrench is connected to a static torque sensor through a simulated bolt.

[0003] The invention patent with application publication number CN107588881A discloses a torque wrench detection device, including a frame, a dynamic torque sensor and a bolt clamping component, one end of the rotating shaft of the dynamic torque sensor is used to install the torque wrench, and the other end is connected to the bolt clamping component, and the frame is provided with a positioning bracket for installing the dynamic torque sensor, and the housing of the dynamic torque sensor is supported on the positioning bracket so that the rotating shaft of the dynamic torque sensor can rotate with the torque wrench.

[0004] However, after actual application by technical personnel in this field, it was found that the above-mentioned detection equipment still has some shortcomings. The most obvious one is that in order to ensure that the torque wrench to be tested effectively drives the dynamic torque sensor shaft to rotate, and at the same time prevents it from rotating on its own during the detection process, before the start of the calibration, the operator needs to manually put the limit assembly that cooperates with the reaction force support part on the outside of the torque wrench to be tested, and then manually complete the connection between the torque wrench to be tested and the dynamic torque sensor shaft, and finally adjust and lock the reaction force support part. There are too many overall operation processes, which leads to the pre-operation before the start of the calibration and the post-operation after the end of the calibration being too cumbersome. The application is too inconvenient and has a great impact on the calibration efficiency of the torque wrench.

[0005] Therefore, it is necessary to invent a pneumatic electric torque wrench dynamic calibration device and a calibration method to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a pneumatic electric torque wrench dynamic calibration device and calibration method, which have a higher degree of automation, simplify the manual operation process and reduce the difficulty of operation, which can not only improve the detection efficiency, but also be more convenient to use, so as to solve the problem proposed in the above background technology that in order to ensure that the torque wrench to be tested effectively drives the dynamic torque sensor shaft to rotate, and at the same time prevents it from rotating during the detection process, before the calibration begins, the operator needs to manually sleeve the limit assembly that cooperates with the reaction force support part on the outside of the torque wrench to be tested, and then manually complete the connection between the torque wrench to be tested and the dynamic torque sensor shaft, and finally adjust and lock the reaction force support part. There are too many overall operation processes, which leads to the pre-operation before the calibration starts and the post-operation after the calibration is completed. It is too inconvenient to use and has a great impact on the calibration efficiency of the torque wrench.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pneumatic electric torque wrench dynamic calibration device, comprising a mounting mechanism, a dynamic calibration mechanism is arranged at the center of the top of the mounting mechanism, a nut and bolt carrying mechanism is arranged at the left end of the top of the mounting mechanism, a torque wrench carrying mechanism is arranged at the right end of the top of the mounting mechanism, a torque wrench limiting mechanism is arranged on the torque wrench carrying mechanism, and a pushing and pulling mechanism is arranged inside the mounting mechanism;

[0008] The nut and bolt carrying mechanism carries nuts and bolts for inspection, the torque wrench carrying mechanism carries the torque wrench to be inspected, the pushing and pulling mechanism pushes the torque wrench limiting mechanism to realize the clamping and limiting of the torque wrench by the torque wrench limiting mechanism, the pushing and pulling mechanism pulls the nut and bolt carrying mechanism to realize the connection between the bolts and the dynamic inspection mechanism, and the torque wrench carrying mechanism is driven during the pulling process of the nut and bolt carrying mechanism to realize the connection between the torque wrench and the dynamic inspection mechanism.

[0009] Preferably, the mounting mechanism comprises a C-shaped base, a limiting guide rail and a mounting plate;

[0010] There are four limit guide rails, which are respectively arranged at the four corners of the top of the C-shaped base. Limit blocks are fixedly arranged at both ends of the top of the limit guide rails, and the mounting plate is fixedly arranged at the middle part of the inner side of the C-shaped base.

[0011] Preferably, the dynamic verification mechanism comprises a U-shaped base, a shaft sleeve, a dynamic torque sensor and a connecting shaft;

[0012] The U-shaped base is fixedly arranged at the top center of the C-shaped base, two sleeves are arranged, and the two sleeves are respectively arranged on both sides of the U-shaped base and are rotatably connected to the U-shaped base through bearings. The dynamic torque sensor is fixedly arranged on the inner side of the U-shaped base, and the output end of the dynamic torque sensor is connected to the torque measuring instrument through a signal cable. The connecting shaft is arranged inside the dynamic torque sensor and is fixedly connected to the two sleeves respectively.

[0013] Preferably, the nut and bolt mounting mechanism comprises a first mounting plate, a hexagonal positioning groove, a pulling rod and a bidirectional screw;

[0014] The first carrying plate is slidably sleeved on the outside of two adjacent limit guide rails, an avoidance channel is opened on the left top of the first carrying plate, the hexagonal positioning groove is opened on the right top of the first carrying plate and is connected with the avoidance channel, two pulling rods are provided, both of the two pulling rods slide through the mounting plate and are fixedly connected to the first carrying plate, the bidirectional screw penetrates the mounting plate and is rotatably connected to the mounting plate through a bearing, and the first carrying plate is sleeved on the left end of the outer side of the bidirectional screw and is transmission connected to the bidirectional screw.

[0015] Preferably, the torque wrench carrying mechanism comprises a second carrying plate, a positioning sleeve and an avoidance groove;

[0016] The second mounting plate is slidably sleeved on the outside of two adjacent limiting guide rails and the transmission sleeve is arranged on the right end of the outside of the bidirectional screw. A guide channel is arranged through the bottom right side of the second mounting plate. The positioning sleeve is fixedly arranged through the top right side of the second mounting plate, and the avoidance groove is opened on the right side of the bottom of the positioning sleeve.

[0017] Preferably, the torque wrench limiting mechanism comprises a guide rod, a return spring, a moving plate, a limiting sleeve, a moving block and a guide groove;

[0018] The guide rod is fixedly arranged on the inner side of the guide channel, the return spring is sleeved on the outer side of the guide rod and is located between the two movable plates, two movable plates and two limit sleeves are provided, the two movable plates are relatively slidably sleeved on the outer side of the guide rod and slidably fit on the inner side of the guide channel, the two limit sleeves are relatively fixedly arranged on the right ends of the two movable plates, the movable block is fixedly arranged on the right end of the sliding sleeve, and the guide groove is opened on the right side of the movable block.

[0019] Preferably, the pushing and pulling mechanism comprises a driving motor, a reciprocating screw, a moving frame, a pulling plate, a sliding sleeve and an avoidance spring;

[0020] The driving motor is fixedly arranged on the left side of the mounting plate and is transmission-connected with the reciprocating screw, the reciprocating screw penetrates the mounting plate and is rotationally connected with the mounting plate through a bearing, the moving frame is located on the right side of the mounting plate and is transmission-sleeved on the outside of the reciprocating screw, two pulling plates are provided, the two pulling plates are respectively fixedly arranged on the front and back sides of the moving frame and are respectively slidingly sleeved on the outsides of the two pulling rods, the sliding sleeve is slidingly sleeved on the outside of the reciprocating screw and slidably penetrates the right end of the moving frame, and the avoidance spring is fixedly connected between the inner wall of the moving frame and the left end of the sliding sleeve and is sleeved on the outside of the reciprocating screw.

[0021] The present invention also discloses a pneumatic electric torque wrench dynamic verification method, the method specifically comprising the following steps:

[0022] S1. Insert the bolt for verification into the inner side of the hexagonal positioning groove, pass through the avoidance channel and extend until the nut on the outer side of the bolt enters the inner side of the hexagonal positioning groove and is limited. Insert the torque wrench to be verified from the right opening of the positioning sleeve into the inner side of the positioning sleeve for positioning. At this time, the handle of the torque wrench is located inside the avoidance groove;

[0023] S2, power the driving motor, the driving motor drives the reciprocating screw to rotate, and then the pulling plate moves rightward along the reciprocating screw. During the rightward movement of the reciprocating screw, the pulling plate is driven to slide outside the pulling rod, and at the same time, the sliding sleeve is pushed by the avoidance spring, and the sliding sleeve is pushed to drive the moving block to move rightward;

[0024] S3, as the moving block continues to move, the inner wall of the guide groove fits with the inclined surface of the left end of the two moving plates, and then as the moving block continues to move right, the inner wall of the guide groove pushes the two moving plates, so that the two moving plates compress the reset springs, and at the same time drive the two limit jackets to approach each other;

[0025] S4, after the right end of the moving block is fitted with the left side of the second mounting plate, the two limiting sleeves are clamped on the outside of the handle of the torque wrench, thereby limiting the handle of the torque wrench. At the same time, due to the obstruction of the second mounting plate, the moving block and the reciprocating screw cannot continue to move to the right;

[0026] S5. The pulling plate fits with the right end of the pulling rod due to the continuous movement of the moving frame. At this time, as the pulling plate continues to move right, the pulling plate drives the first carrying plate to move right along the limiting guide rail through the pulling rod. During the rightward movement of the first carrying plate, the bolt is driven to approach the adjacent shaft sleeve through the hexagonal positioning groove, and the bidirectional screw is driven to rotate. When the bidirectional screw rotates, it drives the second carrying plate to move left synchronously. When the second carrying plate moves left, it drives the torque wrench to approach the adjacent shaft sleeve. In this process, the second carrying plate pushes the moving block and the sliding sleeve to move left synchronously, and the avoidance spring is compressed by the sliding sleeve to form an avoidance.

[0027] S6, after the moving frame moves to the rightmost end of the reciprocating thread outside the reciprocating screw, the bolt enters the deepest part inside the left sleeve, and at the same time, the driving end of the torque wrench enters the right sleeve, and the power supply of the driving motor is stopped at this time;

[0028] S7, start the torque wrench, the torque wrench drives the connecting shaft inside the dynamic torque sensor to rotate through the adjacent shaft sleeve, and the connecting shaft drives the bolt to rotate through another shaft sleeve, thereby simulating the state of the torque wrench tightening the bolt and nut assembly. During this process, the dynamic torque sensor detects the output torque of the torque wrench in real time and displays the torque value through the torque measuring instrument;

[0029] S8. Power is supplied to the drive motor again. At this time, the reciprocating screw drives the moving frame to move left and reset. After the moving frame reaches the leftmost end of the reciprocating thread on the outside of the reciprocating screw, the power supply to the drive motor is stopped. Then, the nut is removed from the inside of the hexagonal positioning groove through the bolt, and the torque wrench is pulled out from the inside of the positioning sleeve through the handle of the torque wrench.

[0030] Technical effects and advantages of the present invention:

[0031] The present invention is provided with a nut and bolt carrying mechanism, a torque wrench carrying mechanism, a torque wrench limiting mechanism and a pushing and pulling mechanism, so that the nut and bolt carrying mechanism can be used to carry the test nuts and bolts. After the torque wrench to be tested is carried by the torque wrench carrying mechanism, the pushing and pulling mechanism pushes the torque wrench limiting mechanism, thereby limiting the torque wrench and preventing it from rotating during the subsequent testing process. Subsequently, the pushing and pulling mechanism pulls the nut and bolt carrying mechanism, thereby connecting the bolt with the dynamic testing mechanism. At the same time, the torque wrench carrying mechanism is driven during the pulling of the nut and bolt carrying mechanism, thereby connecting the torque wrench with the dynamic testing mechanism, thereby completing the pre-test operation. Compared with the existing devices of the same type, the present invention has a higher degree of automation, simplifies the manual operation process and reduces the difficulty of operation, which can not only improve the detection efficiency, but also be more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of the installation mechanism and the dynamic verification mechanism of the present invention.

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of the nut and bolt carrying mechanism of the present invention.

[0035] Figure 4 It is a three-dimensional structural schematic diagram of the torque wrench carrying mechanism and the torque wrench limiting mechanism of the present invention.

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of the pushing and pulling mechanism of the present invention.

[0037] In the figure: 1. Installation mechanism; 11. C-shaped base; 12. Limiting guide rail; 13. Mounting plate; 2. Dynamic verification mechanism; 21. U-shaped base; 22. Bushing; 23. Dynamic torque sensor; 24. Connecting shaft; 3. Nut and bolt carrying mechanism; 31. First carrying plate; 32. Hexagonal positioning groove; 33. Pull rod; 34. Bidirectional screw; 4. Torque wrench carrying mechanism; 41. Second carrying plate; 42. Positioning sleeve; 43. Avoidance groove; 5. Torque wrench limiting mechanism; 51. Guide rod; 52. Reset spring; 53. Moving plate; 54. Limiting sleeve; 55. Moving block; 56. Guide groove; 6. Pushing and pulling mechanism; 61. Driving motor; 62. Reciprocating screw; 63. Moving frame; 64. Pulling plate; 65. Sliding sleeve; 66. Avoidance spring. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1

[0040] The present invention provides Figure 1-Figure 5 A pneumatic electric torque wrench dynamic verification device shown in the figure comprises a mounting mechanism 1, a dynamic verification mechanism 2 is arranged at the center of the top of the mounting mechanism 1, a nut and bolt carrying mechanism 3 is arranged at the left end of the top of the mounting mechanism 1, a torque wrench carrying mechanism 4 is arranged at the right end of the top of the mounting mechanism 1, a torque wrench limiting mechanism 5 is arranged on the torque wrench carrying mechanism 4, and a pushing and pulling mechanism 6 is arranged inside the mounting mechanism 1;

[0041] The nut and bolt carrying mechanism 3 carries nuts and bolts for inspection, the torque wrench carrying mechanism 4 carries the torque wrench to be inspected, the pushing and pulling mechanism 6 pushes the torque wrench limiting mechanism 5 to realize the clamping and limiting of the torque wrench by the torque wrench limiting mechanism 5, the pushing and pulling mechanism 6 pulls the nut and bolt carrying mechanism 3 to realize the connection between the bolts and the dynamic inspection mechanism 2, and the torque wrench carrying mechanism 4 is driven during the pulling process of the nut and bolt carrying mechanism 3 to realize the connection between the torque wrench and the dynamic inspection mechanism 2.

[0042] like Figure 2As shown, the mounting mechanism 1 includes a C-shaped base 11, a limiting guide rail 12 and a mounting plate 13, wherein four limiting guide rails 12 are provided, and the four limiting guide rails 12 are respectively provided at the four corners of the top of the C-shaped base 11, and limiting blocks are fixedly provided at both ends of the top of the limiting guide rails 12, and the mounting plate 13 is fixedly provided in the middle of the inner side of the C-shaped base 11.

[0043] By setting the above structure, the limiting guide rail 12 can guide the first mounting plate 31 and the second mounting plate 41 during the movement, and the limiting block at the top of the limiting guide rail 12 can prevent the first mounting plate 31 and the second mounting plate 41 from detaching from the top of the limiting guide rail 12.

[0044] like Figure 2 As shown, the dynamic verification mechanism 2 includes a U-shaped base 21, a sleeve 22, a dynamic torque sensor 23 and a connecting shaft 24, wherein the U-shaped base 21 is fixedly arranged at the top center of the C-shaped base 11, two sleeves 22 are provided, and the two sleeves 22 are respectively arranged on both sides of the U-shaped base 21 and are rotatably connected to the U-shaped base 21 through bearings, the dynamic torque sensor 23 is fixedly arranged on the inner side of the U-shaped base 21, and the output end of the dynamic torque sensor 23 is connected to the torque measuring instrument through a signal cable, and the connecting shaft 24 is arranged inside the dynamic torque sensor 23 and is respectively fixedly connected to the two sleeves 22.

[0045] By setting the above structure, after the torque wrench is started, the connecting shaft 24 on the inner side of the dynamic torque sensor 23 is driven to rotate through the adjacent sleeve 22, and the connecting shaft 24 drives the bolt to rotate through another sleeve 22, thereby simulating the state of the torque wrench tightening the bolt and nut assembly. During this process, the dynamic torque sensor 23 detects the output torque of the torque wrench in real time and displays the torque value through the torque meter.

[0046] like Figure 3 As shown, the nut and bolt carrying mechanism 3 includes a first carrying plate 31, a hexagonal positioning groove 32, a pulling rod 33 and a bidirectional screw 34, wherein the first carrying plate 31 is slidably sleeved on the outside of two adjacent limiting guide rails 12, an avoidance channel is opened at the left top of the first carrying plate 31, the hexagonal positioning groove 32 is opened at the right top of the first carrying plate 31 and is connected to the avoidance channel, two pulling rods 33 are provided, both of the two pulling rods 33 slide through the mounting plate 13 and are fixedly connected to the first carrying plate 31, the bidirectional screw 34 penetrates the mounting plate 13 and is rotatably connected to the mounting plate 13 through a bearing, and the first carrying plate 31 is sleeved on the left end of the outer side of the bidirectional screw 34 and is transmission-connected to the bidirectional screw 34.

[0047] By setting the above structure, after the pulling plate 64 is fitted with the right end of the pulling rod 33 due to the continuous movement of the moving frame 63, as the pulling plate 64 continues to move to the right, the pulling plate 64 drives the first mounting plate 31 to move to the right along the limiting guide rail 12 through the pulling rod 33. During the rightward movement of the first mounting plate 31, the bolt is driven to approach the adjacent shaft sleeve 22 through the hexagonal positioning groove 32.

[0048] like Figure 4 As shown, the torque wrench mounting mechanism 4 includes a second mounting plate 41, a positioning sleeve 42 and an avoidance groove 43, wherein the second mounting plate 41 is slidably sleeved on the outside of two adjacent limiting guide rails 12 and transmission sleeved on the right end of the outside of the bidirectional screw 34, a guide channel is penetrated at the bottom right side of the second mounting plate 41, the positioning sleeve 42 is fixedly penetrated at the top right side of the second mounting plate 41, and the avoidance groove 43 is opened on the right side of the bottom of the positioning sleeve 42.

[0049] By setting the above structure, it is convenient to insert the torque wrench to be tested into the inner side of the positioning sleeve 42 from the right side opening of the positioning sleeve 42 for positioning. At this time, the handle of the torque wrench is located on the inner side of the avoidance groove 43. When the subsequent two-way screw 34 rotates, it drives the second mounting plate 41 to move left synchronously. When the second mounting plate 41 moves left, it drives the torque wrench to approach the adjacent shaft sleeve 22. During this process, the second mounting plate 41 pushes the moving block 55 and the sliding sleeve 65 to move left synchronously, and the avoidance spring 66 is compressed by the sliding sleeve 65 to form an avoidance until the bolt enters the deepest part of the left shaft sleeve 22, and at the same time, the driving end of the torque wrench enters the right shaft sleeve 22.

[0050] like Figure 4 and Figure 5 As shown, the torque wrench limiting mechanism 5 includes a guide rod 51, a reset spring 52, a movable plate 53, a limiting sleeve 54, a movable block 55 and a guide groove 56, wherein the guide rod 51 is fixedly arranged on the inner side of the guide channel, the reset spring 52 is sleeved on the outer side of the guide rod 51 and is located between the two movable plates 53, two movable plates 53 and two limiting sleeves 54 are each provided, the two movable plates 53 are relatively slidably sleeved on the outer side of the guide rod 51 and slidably fit on the inner side of the guide channel, the two limiting sleeves 54 are relatively fixedly arranged on the right ends of the two movable plates 53, the movable block 55 is fixedly arranged on the right end of the sliding sleeve 65, and the guide groove 56 is opened on the right side of the movable block 55.

[0051] By setting the above structure, as the moving block 55 continues to move, the inner wall of the guide groove 56 fits with the inclined surface of the left end of the two moving plates 53. Subsequently, as the moving block 55 continues to move right, the inner wall of the guide groove 56 pushes the two moving plates 53, thereby causing the two moving plates 53 to compress the reset spring 52, and at the same time drive the two limiting sleeves 54 to approach each other. After the right end of the moving block 55 fits with the left side of the second mounting plate 41, the two limiting sleeves 54 are clamped on the outside of the handle of the torque wrench, thereby achieving the limitation of the torque wrench handle.

[0052] like Figure 5 As shown, the pushing and pulling mechanism 6 includes a driving motor 61, a reciprocating screw 62, a moving frame 63, a pulling plate 64, a sliding sleeve 65 and an avoidance spring 66, wherein the driving motor 61 is fixedly arranged on the left side of the mounting plate 13 and is transmission-connected to the reciprocating screw 62, the reciprocating screw 62 penetrates the mounting plate 13 and is rotationally connected to the mounting plate 13 through a bearing, the moving frame 63 is located on the right side of the mounting plate 13 and is transmission-sleeved on the outside of the reciprocating screw 62, two pulling plates 64 are provided, the two pulling plates 64 are respectively fixedly arranged on the front and back sides of the moving frame 63 and are respectively slidingly sleeved on the outsides of the two pulling rods 33, the sliding sleeve 65 is slidingly sleeved on the outside of the reciprocating screw 62 and slidingly penetrates the right end of the moving frame 63, and the avoidance spring 66 is fixedly connected between the inner wall of the moving frame 63 and the left end of the sliding sleeve 65 and is sleeved on the outside of the reciprocating screw 62.

[0053] By setting the above structure, the driving motor 61 can drive the reciprocating screw 62 to rotate after power is supplied, thereby causing the pulling plate 64 to move rightward along the reciprocating screw 62. During the rightward movement of the reciprocating screw 62, the pulling plate 64 is driven to slide on the outside of the pulling rod 33. At the same time, the sliding sleeve 65 is pushed by the avoidance spring 66. After the sliding sleeve 65 is pushed, it drives the moving block 55 to move rightward, thereby causing the torque wrench limiting mechanism 5 to realize the limiting operation of the torque wrench handle.

[0054] Example 2

[0055] The present invention also discloses a pneumatic electric torque wrench dynamic verification method, the method specifically comprising the following steps:

[0056] S1. Insert the bolt for verification into the inner side of the hexagonal positioning groove 32, pass through the avoidance channel and extend until the nut on the outer side of the bolt enters the inner side of the hexagonal positioning groove 32 and is limited. Insert the torque wrench to be verified from the right opening of the positioning sleeve 42 into the inner side of the positioning sleeve 42 for positioning. At this time, the handle of the torque wrench is located inside the avoidance groove 43.

[0057] S2. Power is supplied to the driving motor 61, which drives the reciprocating screw 62 to rotate, thereby causing the pulling plate 64 to move rightward along the reciprocating screw 62. During the rightward movement of the reciprocating screw 62, the pulling plate 64 is driven to slide outside the pulling rod 33. At the same time, the sliding sleeve 65 is pushed by the avoidance spring 66. After being pushed, the sliding sleeve 65 drives the moving block 55 to move rightward.

[0058] S3, as the moving block 55 continues to move, the inner wall of the guide groove 56 fits with the inclined surface of the left end of the two moving plates 53, and then as the moving block 55 continues to move right, the inner wall of the guide groove 56 pushes the two moving plates 53, so that the two moving plates 53 compress the return spring 52, and at the same time drive the two limit jackets 54 to move closer to each other;

[0059] S4, after the right end of the moving block 55 is attached to the left side of the second mounting plate 41, the two limiting sleeves 54 are clamped on the outside of the handle of the torque wrench, thereby limiting the torque wrench handle. At the same time, due to the obstruction of the second mounting plate 41, the moving block 55 and the reciprocating screw 62 cannot continue to move to the right;

[0060] S5. The pulling plate 64 is fitted with the right end of the pulling rod 33 due to the continuous movement of the moving frame 63. At this time, as the pulling plate 64 continues to move right, the pulling plate 64 drives the first carrying plate 31 to move right along the limiting guide rail 12 through the pulling rod 33. During the rightward movement of the first carrying plate 31, the bolt is driven to approach the adjacent shaft sleeve 22 through the hexagonal positioning groove 32, and the bidirectional screw 34 is driven to rotate. When the bidirectional screw 34 rotates, it drives the second carrying plate 41 to move left synchronously. When the second carrying plate 41 moves left, it drives the torque wrench to approach the adjacent shaft sleeve 22. In this process, the second carrying plate 41 pushes the moving block 55 and the sliding sleeve 65 to move left synchronously, and the avoidance spring 66 is compressed by the sliding sleeve 65 to form an avoidance.

[0061] S6, after the moving frame 63 moves to the rightmost end of the reciprocating thread outside the reciprocating screw 62, the bolt enters the deepest part of the left sleeve 22, and the driving end of the torque wrench enters the right sleeve 22, and the power supply of the driving motor 61 is stopped;

[0062] S7, start the torque wrench, the torque wrench drives the connecting shaft 24 inside the dynamic torque sensor 23 to rotate through the adjacent shaft sleeve 22, and the connecting shaft 24 drives the bolt to rotate through the other shaft sleeve 22, thereby simulating the state of the torque wrench tightening the bolt and nut assembly. During this process, the dynamic torque sensor 23 detects the output torque of the torque wrench in real time and displays the torque value through the torque measuring instrument;

[0063] S8. Power is supplied to the drive motor 61 again. At this time, the reciprocating screw 62 drives the moving frame 63 to move left and reset. After the moving frame 63 reaches the leftmost end of the reciprocating thread on the outside of the reciprocating screw 62, the power supply to the drive motor 61 is stopped. Then, the nut is removed from the inside of the hexagonal positioning groove 32 by the bolt, and the torque wrench is pulled out from the inside of the positioning sleeve 42 by the handle of the torque wrench.

[0064] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic electric torque wrench dynamic calibration device, characterized in that: It includes an installation mechanism, a dynamic verification mechanism is arranged at the center of the top of the installation mechanism, a nut and bolt carrying mechanism is arranged at the left end of the top of the installation mechanism, a torque wrench carrying mechanism is arranged at the right end of the top of the installation mechanism, a torque wrench limiting mechanism is arranged on the torque wrench carrying mechanism, and a pushing and pulling mechanism is arranged inside the installation mechanism; The nut and bolt carrying mechanism carries the nuts and bolts for inspection, the torque wrench carrying mechanism carries the torque wrench to be inspected, the pushing and pulling mechanism pushes the torque wrench limiting mechanism, so that the torque wrench limiting mechanism clamps and limits the torque wrench, and the pushing and pulling mechanism pulls the nut and bolt carrying mechanism to realize the connection between the bolt and the dynamic inspection mechanism. When the nut and bolt carrying mechanism is pulled, the torque wrench carrying mechanism is driven to realize the connection between the torque wrench and the dynamic inspection mechanism; The nut and bolt carrying mechanism comprises a first carrying plate, a hexagonal positioning groove, a pulling rod and a bidirectional screw; The first carrying plate is slidably sleeved on the outside of two adjacent limit guide rails, an avoidance channel is provided on the left top of the first carrying plate, a hexagonal positioning groove is provided on the right top of the first carrying plate and is connected to the avoidance channel, two pulling rods are provided, both of which slide through the mounting plate and are fixedly connected to the first carrying plate, the bidirectional screw penetrates the mounting plate and is rotatably connected to the mounting plate through a bearing, the first carrying plate is sleeved on the left end of the outer side of the bidirectional screw and is transmission-connected to the bidirectional screw; The torque wrench limiting mechanism includes a guide rod, a return spring, a moving plate, a limiting sleeve, a moving block and a guide groove; The guide rod is fixedly arranged on the inner side of the guide channel, the return spring is sleeved on the outer side of the guide rod and is located between the two moving plates, two moving plates and two limit sleeves are provided, the two moving plates are relatively slidably sleeved on the outer side of the guide rod and slidably fit on the inner side of the guide channel, the two limit sleeves are relatively fixedly arranged on the right ends of the two moving plates, the moving block is fixedly arranged on the right end of the sliding sleeve, and the guide groove is opened on the right side of the moving block; The pushing and pulling mechanism includes a driving motor, a reciprocating screw, a moving frame, a pulling plate, a sliding sleeve and an avoidance spring; The driving motor is fixedly arranged on the left side of the mounting plate and is transmission-connected to the reciprocating screw. The reciprocating screw penetrates the mounting plate and is rotationally connected to the mounting plate through a bearing. The moving frame is located on the right side of the mounting plate and the transmission sleeve is arranged on the outside of the reciprocating screw. Two pulling plates are arranged, and the two pulling plates are respectively fixedly arranged on the front and back sides of the moving frame and are respectively slidingly sleeved on the outsides of the two pulling rods. The sliding sleeve is slidingly sleeved on the outside of the reciprocating screw and slidingly penetrates the right end of the moving frame. The avoidance spring is fixedly connected between the inner wall of the moving frame and the left end of the sliding sleeve and is sleeved on the outside of the reciprocating screw.

2. The pneumatic electric torque wrench dynamic calibration device according to claim 1, characterized in that: The mounting mechanism includes a C-shaped base, a limiting guide rail and a mounting plate; There are four limit guide rails, which are respectively arranged at the four corners of the top of the C-shaped base. Limit blocks are fixedly arranged at both ends of the top of the limit guide rails, and the mounting plate is fixedly arranged in the middle of the inner side of the C-shaped base.

3. The pneumatic electric torque wrench dynamic calibration device according to claim 2, characterized in that: The dynamic verification mechanism includes a U-shaped base, a shaft sleeve, a dynamic torque sensor and a connecting shaft; The U-shaped base is fixedly arranged at the top center of the C-shaped base, two sleeves are arranged, and the two sleeves are respectively arranged on both sides of the U-shaped base and are rotatably connected to the U-shaped base through bearings. The dynamic torque sensor is fixedly arranged on the inner side of the U-shaped base, and the output end of the dynamic torque sensor is connected to the torque measuring instrument through a signal cable. The connecting shaft is arranged inside the dynamic torque sensor and is respectively fixedly connected to the two sleeves.

4. The pneumatic electric torque wrench dynamic calibration device according to claim 3 is characterized by: The torque wrench carrying mechanism includes a second carrying plate, a positioning sleeve and an avoidance groove; The second mounting plate is slidingly sleeved on the outside of two adjacent limiting guide rails and the transmission sleeve is arranged on the right end of the outside of the bidirectional screw. A guide channel is arranged through the bottom right side of the second mounting plate, and a positioning sleeve is fixedly arranged through the top right side of the second mounting plate, and an avoidance groove is opened on the right side of the bottom of the positioning sleeve.

5. A pneumatic electric torque wrench dynamic verification method, characterized in that: The method is implemented using a pneumatic electric torque wrench dynamic verification device as claimed in claim 4, and the method specifically comprises the following steps: S1. Insert the bolt for verification into the inner side of the hexagonal positioning groove, pass through the avoidance channel and extend until the nut on the outer side of the bolt enters the inner side of the hexagonal positioning groove and is limited. Insert the torque wrench to be verified from the right opening of the positioning sleeve into the inner side of the positioning sleeve for positioning. At this time, the handle of the torque wrench is located inside the avoidance groove; S2, power the driving motor, the driving motor drives the reciprocating screw to rotate, and then the pulling plate moves rightward along the reciprocating screw. During the rightward movement of the reciprocating screw, the pulling plate is driven to slide outside the pulling rod, and at the same time, the sliding sleeve is pushed by the avoidance spring, and the sliding sleeve is pushed to drive the moving block to move rightward; S3, as the moving block continues to move, the inner wall of the guide groove fits with the inclined surface of the left end of the two moving plates, and then as the moving block continues to move right, the inner wall of the guide groove pushes the two moving plates, so that the two moving plates compress the reset springs, and at the same time drive the two limit jackets to approach each other; S4, after the right end of the moving block is fitted with the left side of the second mounting plate, the two limiting sleeves are clamped on the outside of the handle of the torque wrench, thereby limiting the handle of the torque wrench. At the same time, due to the obstruction of the second mounting plate, the moving block and the reciprocating screw cannot continue to move to the right; S5. The pulling plate fits with the right end of the pulling rod due to the continuous movement of the moving frame. At this time, as the pulling plate continues to move right, the pulling plate drives the first carrying plate to move right along the limiting guide rail through the pulling rod. During the rightward movement of the first carrying plate, the bolt is driven to approach the adjacent shaft sleeve through the hexagonal positioning groove, and the bidirectional screw is driven to rotate. When the bidirectional screw rotates, it drives the second carrying plate to move left synchronously. When the second carrying plate moves left, it drives the torque wrench to approach the adjacent shaft sleeve. In this process, the second carrying plate pushes the moving block and the sliding sleeve to move left synchronously, and the avoidance spring is compressed by the sliding sleeve to form an avoidance. S6, after the moving frame moves to the rightmost end of the reciprocating thread outside the reciprocating screw, the bolt enters the deepest part inside the left sleeve, and at the same time, the driving end of the torque wrench enters the right sleeve, and the power supply of the driving motor is stopped at this time; S7, start the torque wrench, the torque wrench drives the connecting shaft inside the dynamic torque sensor to rotate through the adjacent shaft sleeve, and the connecting shaft drives the bolt to rotate through another shaft sleeve, thereby simulating the state of the torque wrench tightening the bolt and nut assembly. During this process, the dynamic torque sensor detects the output torque of the torque wrench in real time and displays the torque value through the torque measuring instrument; S8. Power is supplied to the drive motor again. At this time, the reciprocating screw drives the moving frame to move left and reset. After the moving frame reaches the leftmost end of the reciprocating thread on the outside of the reciprocating screw, the power supply to the drive motor is stopped. Then, the nut is removed from the inside of the hexagonal positioning groove through the bolt, and the torque wrench is pulled out from the inside of the positioning sleeve through the handle of the torque wrench.

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