Gear adjusting device in electric tool torque testing equipment

Abstract

The utility model relates to a gear adjusting device in electric tool torque testing equipment, and relates to the technical field of electric tool torque testing equipment. The gear adjusting device comprises a mounting plate which is transversely arranged; a first synchronous belt and a second synchronous belt are mounted on the mounting plate, are positioned at the same horizontal height and are oppositely arranged at an interval; a first driving assembly for driving the first synchronous belt and the second synchronous belt to rotate synchronously is arranged on the mounting plate; the mounting plate is further provided with a second driving assembly used for driving the first synchronous belt and the second synchronous belt to move relatively. And the first synchronous belt and the second synchronous belt can clamp a torque adjusting ring of the electric tool after relatively moving. The gear adjusting device clamps the torque adjusting ring of the electric tool through the first synchronous belt and the second synchronous belt and drives the torque adjusting ring to rotate, so that different output torque gears of the electric tool are adjusted, the automation degree is high, and actions are accurate and reliable.

Description

Technical Field

[0001] The present application relates to the technical field of torque testing equipment, and in particular to a gear adjustment device in a torque testing equipment for an electric tool. Background Art

[0002] Power tools are mechanized tools that use electric motors or electromagnets as power and drive the working head through a transmission mechanism. They are usually made into handheld and portable tools with a light structure and are easy to carry and use. Because they can improve production efficiency by several to dozens of times compared to hand tools, power tools have been widely used in various fields of the national economy and have entered household use. Common power tools include electric drills, electric grinders, electric wrenches, and electric screwdrivers.

[0003] Torque is one of the most important parameter indicators of power tools, including electric screwdrivers. Torque standards are usually expressed as maximum torque values ​​or adjustable torque ranges. The maximum torque value refers to the maximum torque that an electric screwdriver can generate when working; the adjustable torque range refers to the torque value range that can be adjusted as needed. Torque standards are generally set by product manufacturers based on different usage requirements and application scenarios. When choosing power tools such as electric screwdrivers, it is necessary to determine the torque standard based on specific work requirements and usage scenarios. For example, when tightening screws with an electric screwdriver, different screw sizes and materials require different torques. Too low torque may cause the screws to fail to tighten, and too high torque may damage the screws or related parts. Therefore, it is very important to choose the right torque standard.

[0004] In order to improve the versatility and adaptability of the electric screwdriver, a torque adjustment ring is also provided to adjust different torque output gears of the electric screwdriver.

[0005] In order to improve the reliability of electric tools such as electric screwdrivers, it is also necessary to test the torque output value of the electric tools before leaving the factory or after long-term use to determine whether the product is qualified. In the related art, handheld electric tools are usually tested on a torque tester, and the torque adjustment ring needs to be manually rotated frequently to adjust the torque gear, which is labor-intensive and inefficient for the tester. Utility Model Content

[0006] In order to improve the automation and efficiency of power tool torque testing, the present application provides a gear adjustment device in a power tool torque testing device.

[0007] The gear adjustment device in the electric tool torque testing device provided in this application adopts the following technical solution:

[0008] A gear adjustment device in an electric tool torque testing device comprises a transversely arranged mounting plate; a first synchronous belt and a second synchronous belt are mounted on the mounting plate, the first synchronous belt and the second synchronous belt are located at the same horizontal height and are arranged opposite to each other with a spacing; a first driving component for driving the first synchronous belt and the second synchronous belt to rotate synchronously is arranged on the mounting plate; a second driving component for driving the first synchronous belt and the second synchronous belt to move relative to each other is also arranged on the mounting plate; the first synchronous belt and the second synchronous belt can clamp the torque adjustment ring of the electric tool after the relative movement.

[0009] The torque adjustment ring of the power tool in the present application is used to set and control the output torque of the rotating working head of the power tool. It is usually an annular structure located in the handle part of the power tool and can be rotated to change the internal setting. Inside it can be a ratchet or friction disk with scales or marks, which is connected to the transmission system of the main drive of the power tool. When the set torque is reached, the ratchet will slip or the resistance of the friction disk will increase, thereby interrupting the power transmission; a locking structure can also be set inside it to ensure that the set torque will not change accidentally during use. The user turns the torque adjustment ring to set the required torque value by changing the contact point position of the ratchet or friction disk.

[0010] When it is necessary to detect the torque output value of the electric tool, the electric tool is placed between the first synchronous belt and the second synchronous belt, and the torque adjustment ring of the electric tool is at the same horizontal height as the first synchronous belt and the second synchronous belt; the two sides of the torque adjustment ring are respectively opposite to the ends of the first synchronous belt and the second synchronous belt, and the rotating working head of the electric tool is inserted into the torque tester below; the second driving component drives the first synchronous belt and the second synchronous belt to move relative to each other, so that the ends of the first synchronous belt and the second synchronous belt are relatively close to each other and clamp the torque adjustment ring of the electric tool, and the torque size of the electric tool at this gear is measured by the torque tester; then the first driving component drives the first synchronous belt and the second synchronous belt to run in the same direction for a certain distance, and the ends of the first synchronous belt and the second synchronous belt can drive the torque adjustment ring to rotate a certain angle through friction, thereby realizing automatic adjustment of the gear of the electric tool, and then realizing torque measurement under all gears of the electric tool.

[0011] By adopting the above technical solution, the electric tool in this application is clamped between the first synchronous belt and the second synchronous belt during detection, and is fixed and limited, so that no shaking occurs, and the test torque is stable, thereby ensuring the accuracy and reliability of the detection data. In this application, the automatic adjustment of the gear position of the electric tool is realized through the operation of the first synchronous belt and the second synchronous belt. The action is accurate and efficient, saving time and effort, avoiding labor injuries caused by large reaction forces caused by long-term operation of operators, and greatly improving the test efficiency and production efficiency of electric tools, reducing production costs.

[0012] Optionally, a notch is provided on one side of the middle portion of the mounting plate, and the notch is located between the first synchronous belt and the second synchronous belt. An arc-shaped groove is provided on the mounting plate at the bottom of the notch. A fixing strip is detachably connected to the notch on the mounting plate, and a clamping hole for clamping a power tool is formed between the side of the fixing strip and the side wall of the arc-shaped groove.

[0013] By adopting the above technical solution, the installation and placement of the electric tool to be tested is facilitated, and the electric tool is clamped and fixed by the fixing bar to prevent it from rotating in the circumferential direction, thereby ensuring the accuracy and reliability of the first synchronous belt and the second synchronous belt when driving the torque adjustment ring to rotate and adjust.

[0014] Optionally, a first movable frame and a second movable frame are respectively provided on the mounting plate, the first movable frame and the second movable frame are arranged opposite to each other and can move relative to each other under the drive of the second driving component, one end of the first synchronous belt is connected to the first movable frame, and one end of the second synchronous belt is connected to the second movable frame.

[0015] By adopting the above technical solution, the first movable frame and the second movable frame are used to drive the first synchronous belt and the second synchronous belt to move horizontally, which is convenient for assembly and has stable and reliable operation.

[0016] Optionally, the first drive assembly includes a first motor and a second motor, both of which are vertically fixed on the mounting plate, a first drive wheel is fixed on the output shaft of the first motor, the other end of the first synchronous belt is sleeved on the first drive wheel, a second drive wheel is fixed on the output shaft of the second motor, and the other end of the second synchronous belt is sleeved on the second drive wheel.

[0017] The first motor and the second motor can both be servo motors; by adopting the above technical solution, the first motor controls the first synchronous belt to operate independently, and the second motor controls the second synchronous belt to operate independently, which can improve the accuracy and reliability of the first synchronous belt and the second synchronous belt when driving the torque adjustment ring to rotate and shift gears. One end of the first synchronous belt and the second synchronous belt is fixed relative to the mounting plate, and the second drive assembly drives the first movable frame and the second movable frame to move and drives the other end of the first synchronous belt and the second synchronous belt to move. In this process, the first synchronous belt and the second synchronous belt can be tightened to better fit the torque adjustment ring of the power tool, thereby accurately and reliably adjusting the gear position of the power tool.

[0018] Optionally, the second driving assembly includes a first cylinder and a second cylinder; the piston rod of the first cylinder is fixedly connected to one end of the first movable frame, and vertical first supporting rollers are provided on both sides of the other end of the first movable frame, and the end of the first synchronous belt is sleeved on two spaced first supporting rollers; the piston rod of the second cylinder is fixedly connected to one end of the second movable frame, and vertical second supporting rollers are provided on both sides of the other end of the second movable frame, and the end of the second synchronous belt is sleeved on two spaced second supporting rollers.

[0019] By adopting the above technical solution, the end of the first synchronous belt passes around the two spaced first support rollers, and the end of the second synchronous belt passes around the two spaced second support rollers. The first synchronous belt between the two spaced first support rollers and the second synchronous belt between the two spaced second support rollers respectively clamp the torque adjustment ring from both sides of the torque adjustment ring, so that the first synchronous belt and the second synchronous belt have sufficient contact area with the torque adjustment ring to generate stable and reliable friction force. When the first support roller and the second support roller on the same side approach each other, the first synchronous belt and the second synchronous belt that clamp the torque adjustment ring are deformed into a semicircular arc shape, and the torque adjustment ring is driven to rotate stably and reliably.

[0020] Optionally, the first motor and the second motor are both vertically fixed downward on the upper side of the mounting plate, the first synchronous belt and the first driving wheel are located on the lower side of the mounting plate, and the output shaft of the first motor passes through the mounting plate and is fixedly connected to the first driving wheel; the second synchronous belt and the second driving wheel are located on the lower side of the mounting plate, and the output shaft of the second motor passes through the mounting plate and is fixedly connected to the second driving wheel;

[0021] The first cylinder and the second cylinder are respectively fixedly connected to the two ends of the lower side of the mounting plate, the piston rods of the first cylinder and the second cylinder are arranged oppositely, and the first movable frame and the second movable frame are both located between the first cylinder and the second cylinder.

[0022] By adopting the above technical solution, the overall structural layout is reasonable, the structure is compact, and the action is precise and reliable.

[0023] Optionally, the first movable frame and the second movable frame each include an end plate and a first side plate and a second side plate fixedly mounted at both ends of the end plate, the first side plate and the second side plate are arranged parallel to each other, one end of the first side plate and the second side plate are fixedly connected to the end plate, and the other ends of the first side plate and the second side plate are each provided with a clearance groove that is recessed from the end surface in the length direction of the two sides, and the clearance grooves of the first side plate and the second side plate are provided with connecting parts that are bent and extended in the direction between the first side plate and the second side plate at both upper and lower sides of the grooves, and the upper and lower ends of the first support roller and the second support roller are rotatably mounted on the corresponding connecting parts;

[0024] The first synchronous belt and the first driving wheel are both located between the first side plate and the second side plate of the first movable frame, and the second synchronous belt and the second driving wheel are both located between the first side plate and the second side plate of the second movable frame.

[0025] By adopting the above technical solution, the end of the first synchronous belt and the end of the second synchronous belt have sufficient area to contact the outer peripheral surface of the torque adjustment ring of the power tool. At the same time, the first support roller and the second support roller will not interfere with the power tool and will not affect the normal operation of the first synchronous belt and the second synchronous belt.

[0026] Optionally, the inner walls of the first side plate and the second side plate both have a relief slope extending obliquely from the inner wall toward the bottom of the relief groove.

[0027] The first synchronous belt and the second synchronous belt are in an inclined state, that is, the width of one end of the first synchronous belt and the second synchronous belt close to the power tool is greater than the width of the other end. By adopting the above technical solution, the mutual interference and friction between the first synchronous belt and the second synchronous belt and the first side plate and the inner wall of the second side plate is effectively avoided, thereby reducing wear and improving the stability and reliability of the operation of the first synchronous belt and the second synchronous belt.

[0028] Optionally, the first synchronous belt and the second synchronous belt are both gauge belts, and the first driving wheel and the second driving wheel both have teeth on their outer circumferential surfaces.

[0029] By adopting the above technical solution, the gauge belt cooperates with the teeth on the first drive wheel and the second drive wheel, effectively preventing the first synchronous belt and the second synchronous belt from slipping, thereby improving the accuracy of the operation of the first synchronous belt and the second synchronous belt.

[0030] Optionally, the gear adjustment device also includes a column frame, a vertical guide rail is fixedly provided on the column frame, a connecting plate is fixedly connected to the mounting plate, a sliding block is fixedly provided on one side of the connecting plate, and the sliding block is slidably connected to the guide rail.

[0031] Two parallel and spaced guide rails can be provided, and two corresponding sliders are also provided on the connecting plate. By adopting the above technical solution, it is convenient to place the electric tool to be tested and move it up and down, so that the rotating working head of the electric tool can be efficiently inserted into the torque tester for testing, and it is also convenient to remove the electric tool after testing.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. In the present application, the electric tool is clamped between the first synchronous belt and the second synchronous belt during testing, and is fixed in position with the help of a fixing strip, so that no shaking occurs and the test is stable, thereby ensuring the accuracy and reliability of the test data.

[0034] 2. In the present application, the gear position of the electric tool is automatically adjusted through the operation of the first synchronous belt and the second synchronous belt. The action is precise and efficient, saving time and effort, and avoiding labor injuries caused by large reaction forces during long-term operation of operators.

[0035] 3. The gear adjustment device in this application has a high degree of automation and high working efficiency, which greatly improves the testing efficiency and production efficiency of power tools and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional structural schematic diagram of the gear adjustment device in this application.

[0037] Figure 2 It is a schematic diagram of the use status structure of the gear adjustment device in this application.

[0038] Figure 3 It is a schematic diagram of the exploded structure of the gear adjustment device in the present application in the use state.

[0039] Figure 4 It is a schematic diagram of the partial explosion structure of the gear adjustment device in this application.

[0040] In the figure:

[0041] 10. Mounting plate; 11. Notch; 12. Arc groove; 13. Column frame; 14. Guide rail; 15. Connecting plate; 16. Slider;

[0042] 20. The first synchronous belt;

[0043] 30. Second synchronous belt;

[0044] 40. First drive assembly; 41. First motor; 42. Second motor; 43. First drive wheel; 44. Second drive wheel;

[0045] 50. Second drive assembly; 51. First cylinder; 52. Second cylinder;

[0046] 60. Power tools; 61. Torque adjustment ring;

[0047] 70. Fixing strip;

[0048] 80. first movable frame; 81. first supporting roller; 82. end plate; 83. first side plate; 84. second side plate; 85. clearance groove; 86. connecting part; 87. clearance slope;

[0049] 90. second movable frame; 91. second supporting roller;

[0050] 100. Torque tester. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0052] Reference Figure 1 and Figure 2 As shown, the gear adjustment device in the torque testing device of the electric tool 60 in the present application is used in conjunction with the torque tester 100, which includes a column frame 13 and a mounting plate 10. The column frame 13 includes two vertical columns, which are arranged in parallel and spaced apart. Vertical guide rails 14 are fixed on the sides of the two columns. The mounting plate 10 is arranged horizontally, and a connecting plate 15 is fixedly connected to one side of the mounting plate 10. Two sliders 16 are fixedly provided on one side of the connecting plate 15. The two sliders 16 are respectively slidably connected to the two guide rails 14. In this way, the entire mounting plate 10 can move up and down, the torque tester 100 is installed below the mounting plate 10, and the electric tool 60 to be tested is installed on the mounting plate 10. The mounting plate 10 is lifted and lowered to facilitate the insertion of the rotating working head of the electric tool 60 into the torque tester 100 for testing, and also to facilitate the removal of the electric tool 60 after the test.

[0053] Reference Figure 3 and Figure 4 As shown, a first synchronous belt 20 and a second synchronous belt 30 are provided on the lower side of the mounting plate 10, and the first synchronous belt 20 and the second synchronous belt 30 are located at the same horizontal height and are arranged opposite to each other with a gap; a first driving assembly 40 for driving the first synchronous belt 20 and the second synchronous belt 30 to rotate synchronously is provided on the mounting plate 10; a second driving assembly 50 for driving the first synchronous belt 20 and the second synchronous belt 30 to move relative to each other is also provided on the mounting plate 10; a torque adjustment ring 61 that can clamp an electric tool 60 after the first synchronous belt 20 and the second synchronous belt 30 move relative to each other.

[0054] Reference Figure 3 and Figure 4 As shown, a notch 11 is provided on one side of the middle portion of the mounting plate 10, and the notch 11 is located between the first synchronous belt 20 and the second synchronous belt 30. An arc-shaped groove 12 is provided on the mounting plate 10 at the bottom of the notch 11. A fixing strip 70 is detachably connected to the notch 11 on the mounting plate 10, and a clamping hole for clamping the power tool 60 is formed between the side surface of the fixing strip 70 and the side wall of the arc-shaped groove 12.

[0055] Reference Figure 3 and Figure 4 As shown, a first movable frame 80 and a second movable frame 90 are respectively provided on the lower side of the mounting plate 10. The first movable frame 80 and the second movable frame 90 are arranged opposite to each other and can move relative to each other under the drive of the second driving assembly 50. One end of the first synchronous belt 20 is connected to the first movable frame 80, and one end of the second synchronous belt 30 is connected to the second movable frame 90.

[0056] The first drive assembly 40 includes a first motor 41 and a second motor 42, and the first motor 41 and the second motor 42 can both be servo motors; the first motor 41 and the second motor 42 are both vertically fixed downward on the upper side of the mounting plate 10, and a first driving wheel 43 is fixedly arranged on the output shaft of the first motor 41, the first synchronous belt 20 and the first driving wheel 43 are located on the lower side of the mounting plate 10, and the output shaft of the first motor 41 passes through the mounting plate 10 and is fixedly connected to the first driving wheel 43; a second driving wheel 44 is fixedly arranged on the output shaft of the second motor 42, the second synchronous belt 30 and the second driving wheel 44 are located on the lower side of the mounting plate 10, and the output shaft of the second motor 42 passes through the mounting plate 10 and is fixedly connected to the second driving wheel 44; the other end of the first synchronous belt 20 is sleeved on the first driving wheel 43, and the other end of the second synchronous belt 30 is sleeved on the second driving wheel 44. The first motor 41 controls the first synchronous belt 20 to operate independently through the first driving wheel 43, and the second motor 42 controls the second synchronous belt 30 to operate independently through the second driving wheel 44. The first synchronous belt 20 and the second synchronous belt 30 can both be gauge belts, and the outer circumferences of the first driving wheel 43 and the second driving wheel 44 both have teeth.

[0057] The second driving assembly 50 includes a first cylinder 51 and a second cylinder 52, which are respectively fixedly connected to the two end positions of the lower side of the mounting plate 10 by bolts, and the piston rods of the first cylinder 51 and the second cylinder 52 are arranged opposite to each other, and the first movable frame 80 and the second movable frame 90 are both located between the first cylinder 51 and the second cylinder 52; the piston rod of the first cylinder 51 is fixedly connected to one end of the first movable frame 80, and vertical first support rollers 81 are arranged on both sides of the other end of the first movable frame 80, and the end of the first synchronous belt 20 is sleeved on two spaced first support rollers 81; the piston rod of the second cylinder 52 is fixedly connected to one end of the second movable frame 90, and vertical second support rollers 91 are arranged on both sides of the other end of the second movable frame 90, and the end of the second synchronous belt 30 is sleeved on two spaced second support rollers 91. The end of the first synchronous belt 20 passes around two spaced first support rollers 81, and the end of the second synchronous belt 30 passes around two spaced second support rollers 91. The first synchronous belt 20 between the two spaced first support rollers 81 and the second synchronous belt 30 between the two spaced second support rollers 91 respectively clamp the torque adjustment ring 61 from both sides of the torque adjustment ring 61, so that the first synchronous belt 20 and the second synchronous belt 30 have sufficient contact area with the torque adjustment ring 61 to generate stable and reliable friction force. When the first support roller 81 and the second support roller 91 on the same side get close to each other, the first synchronous belt 20 and the second synchronous belt 30 that clamp the torque adjustment ring 61 are deformed into a semicircular arc shape, so that the torque adjustment ring 61 is driven to rotate stably and reliably.

[0058] Further, see Figure 4As shown, the first movable frame 80 and the second movable frame 90 both include an end plate 82 and a first side plate 83 and a second side plate 84 fixedly arranged at both ends of the end plate 82, the first side plate 83 and the second side plate 84 are arranged parallel to each other, one end of the first side plate 83 and the second side plate 84 is fixedly connected to the end plate 82, and the other ends of the first side plate 83 and the second side plate 84 are both provided with a makeshift groove 85 which is recessed from the end surface to the length direction of both, and the makeshift groove 85 of the first side plate 83 and the second side plate 84 has a connecting portion 86 bent and extended in the direction between the first side plate 83 and the second side plate 84 at the upper and lower sides of the notch, and the upper and lower ends of the first support roller 81 and the second support roller 91 are rotatably mounted on the corresponding connecting portion 86; the first synchronous belt 20 and the first driving wheel 43 are both located between the first side plate 83 and the second side plate 84 of the first movable frame 80, and the second synchronous belt 30 and the second driving wheel 44 are both located between the first side plate 83 and the second side plate 84 of the second movable frame 90. The first synchronous belt 20 and the second synchronous belt 30 are in an inclined state, that is, the width of one end of the first synchronous belt 20 and the second synchronous belt 30 close to the power tool 60 is greater than the width of the other end, and the inner walls of the first side plate 83 and the second side plate 84 both have a yield slope 87 extending obliquely from the inner wall toward the bottom of the yield groove 85, thereby effectively avoiding mutual interference and friction between the first synchronous belt 20 and the second synchronous belt 30 and the inner walls of the first side plate 83 and the second side plate 84.

[0059] The implementation principle is as follows: the torque adjustment ring 61 of the power tool 60 in the present application is used to set and control the output torque of the rotating working head of the power tool 60. It is usually an annular structure located in the handle part of the power tool 60 and can be rotated to change the internal settings. Inside it can be a ratchet or friction disc with scales or marks, which is connected to the transmission system of the main drive of the power tool 60. When the set torque is reached, the ratchet will slip or the resistance of the friction disc will increase, thereby interrupting the power transmission; a locking structure can also be set inside it to ensure that the set torque will not change accidentally during use. The user turns the torque adjustment ring 61 to set the required torque value by changing the contact point position of the ratchet or friction disc.

[0060] When the torque output value of the electric tool 60 needs to be detected, the electric tool 60 is placed between the first synchronous belt 20 and the second synchronous belt 30, and the torque adjustment ring 61 of the electric tool 60 is at the same level as the first synchronous belt 20 and the second synchronous belt 30; the two sides of the torque adjustment ring 61 are respectively opposite to the ends of the first synchronous belt 20 and the second synchronous belt 30, and the rotating working head of the electric tool 60 is inserted into the torque tester 100 below; the second driving assembly 50 drives the first synchronous belt 20 and the second synchronous belt 30 to move relative to each other, so that the first synchronous belt 20 0 and the end of the second synchronous belt 30 are relatively close to each other and clamp the torque adjustment ring 61 of the power tool 60, and the torque of the power tool 60 in this gear is measured by the torque tester 100; then the first driving component 40 drives the first synchronous belt 20 and the second synchronous belt 30 to rotate in the same direction for a certain distance, and the end of the first synchronous belt 20 and the end of the second synchronous belt 30 can drive the torque adjustment ring 61 to rotate a certain angle through friction, thereby realizing automatic adjustment of the gear of the power tool 60, and then realizing the torque measurement of the power tool 60 in all gears.

[0061] In the present application, the electric tool 60 is clamped between the first synchronous belt 20 and the second synchronous belt 30 during the test, and is fixed and limited, so that no shaking occurs, and the test torque is stable, thereby ensuring the accuracy and reliability of the test data. In the present application, the automatic adjustment of the gear position of the electric tool 60 is achieved through the operation of the first synchronous belt 20 and the second synchronous belt 30, and the action is accurate and efficient, saving time and effort, avoiding labor injuries caused by large reaction forces caused by long-term operation of operators, and greatly improving the test efficiency and production efficiency of the electric tool 60, reducing production costs.

[0062] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A gear adjustment device in a torque testing device for an electric tool, comprising a transversely arranged mounting plate (10); characterized in that: The mounting plate (10) is provided with a first synchronous belt (20) and a second synchronous belt (30), the first synchronous belt (20) and the second synchronous belt (30) are located at the same horizontal height and are arranged opposite to each other with a spacing; the mounting plate (10) is provided with a first driving component (40) for driving the first synchronous belt (20) and the second synchronous belt (30) to rotate synchronously; the mounting plate (10) is also provided with a second driving component (50) for driving the first synchronous belt (20) and the second synchronous belt (30) to move relative to each other; and the first synchronous belt (20) and the second synchronous belt (30) can clamp a torque adjustment ring (61) of an electric tool (60) after the first synchronous belt (20) and the second synchronous belt (30) move relative to each other.

2. The gear adjustment device in the electric tool torque testing device according to claim 1, characterized in that: A notch (11) is provided on one side of the middle of the mounting plate (10), and the notch (11) is located between the first synchronous belt (20) and the second synchronous belt (30). An arc-shaped groove (12) is provided on the mounting plate (10) at the bottom of the notch (11). A fixing strip (70) is detachably connected to the notch (11) on the mounting plate (10), and a clamping hole for clamping the electric tool (60) is formed between the side surface of the fixing strip (70) and the side wall of the arc-shaped groove (12).

3. The gear adjustment device in the electric tool torque testing device according to claim 1 or 2, characterized in that: A first movable frame (80) and a second movable frame (90) are respectively provided on the mounting plate (10); the first movable frame (80) and the second movable frame (90) are arranged opposite to each other and can move relative to each other under the drive of the second driving assembly (50); one end of the first synchronous belt (20) is connected to the first movable frame (80), and one end of the second synchronous belt (30) is connected to the second movable frame (90).

4. The gear adjustment device in the electric tool torque testing device according to claim 3, characterized in that: The first driving assembly (40) comprises a first motor (41) and a second motor (42), the first motor (41) and the second motor (42) are both vertically fixed on the mounting plate (10), a first driving wheel (43) is fixed on the output shaft of the first motor (41), the other end of the first synchronous belt (20) is sleeved on the first driving wheel (43), a second driving wheel (44) is fixed on the output shaft of the second motor (42), and the other end of the second synchronous belt (30) is sleeved on the second driving wheel (44).

5. The gear adjustment device in the electric tool torque testing device according to claim 4, characterized in that: The second driving assembly (50) comprises a first cylinder (51) and a second cylinder (52); the piston rod of the first cylinder (51) is fixedly connected to one end of the first movable frame (80), and vertical first supporting rollers (81) are arranged on both sides of the other end of the first movable frame (80), and the end of the first synchronous belt (20) is sleeved on two spaced first supporting rollers (81); the piston rod of the second cylinder (52) is fixedly connected to one end of the second movable frame (90), and vertical second supporting rollers (91) are arranged on both sides of the other end of the second movable frame (90), and the end of the second synchronous belt (30) is sleeved on two spaced second supporting rollers (91).

6. The gear adjustment device in the electric tool torque testing device according to claim 5, characterized in that: The first motor (41) and the second motor (42) are both vertically fixed downward on the upper side of the mounting plate (10); the first synchronous belt (20) and the first driving wheel (43) are located on the lower side of the mounting plate (10); the output shaft of the first motor (41) passes through the mounting plate (10) and is fixedly connected to the first driving wheel (43); the second synchronous belt (30) and the second driving wheel (44) are located on the lower side of the mounting plate (10); the output shaft of the second motor (42) passes through the mounting plate (10) and is fixedly connected to the second driving wheel (44); The first cylinder (51) and the second cylinder (52) are respectively fixedly connected to the two ends of the lower side of the mounting plate (10); the piston rods of the first cylinder (51) and the second cylinder (52) are arranged opposite to each other; and the first movable frame (80) and the second movable frame (90) are both located between the first cylinder (51) and the second cylinder (52).

7. The gear adjustment device in the electric tool torque testing device according to claim 5, characterized in that: The first movable frame (80) and the second movable frame (90) both comprise an end plate (82) and a first side plate (83) and a second side plate (84) fixedly arranged at both ends of the end plate (82); the first side plate (83) and the second side plate (84) are arranged parallel to each other; one end of the first side plate (83) and the second side plate (84) are fixedly connected to the end plate (82); the other ends of the first side plate (83) and the second side plate (84) are both provided with a clearance groove (85) which is recessed from the end surface in the length direction of the two sides; the clearance groove (85) of the first side plate (83) and the second side plate (84) has a connecting portion (86) bent and extended in the direction between the first side plate (83) and the second side plate (84) at both upper and lower sides of the notch; the upper and lower ends of the first supporting roller (81) and the second supporting roller (91) are rotatably mounted on the corresponding connecting portion (86); The first synchronous belt (20) and the first driving wheel (43) are both located between a first side plate (83) and a second side plate (84) of the first movable frame (80), and the second synchronous belt (30) and the second driving wheel (44) are both located between a first side plate (83) and a second side plate (84) of the second movable frame (90).

8. The gear adjustment device in the electric tool torque testing device according to claim 7, characterized in that: The inner walls of the first side plate (83) and the second side plate (84) are both provided with a relief inclined surface (87) extending obliquely from the inner wall toward the bottom of the relief groove (85).

9. The gear adjustment device in the electric tool torque testing device according to claim 4, characterized in that: The first synchronous belt (20) and the second synchronous belt (30) are both gauge belts, and the first driving wheel (43) and the second driving wheel (44) both have teeth on their outer circumferential surfaces.

10. The gear adjustment device in the electric tool torque testing equipment according to claim 1 or 2, characterized in that: The gear adjustment device also includes a column frame (13), a vertical guide rail (14) is fixedly provided on the column frame (13), a connecting plate (15) is fixedly connected to the mounting plate (10), a sliding block (16) is fixedly provided on one side of the connecting plate (15), and the sliding block (16) is slidably connected to the guide rail (14).

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