Motor terminal pull-off force detection device

Abstract

The invention discloses a motor terminal pulling-off force detection device, and relates to the technical field of pulling force measurement, the motor terminal pulling-off force detection device comprises a test machine and a first assembly installed on the test machine, the first assembly comprises a positioning shell arranged on the test machine; through the arrangement of the second assembly, under the driving of the driving motor, the second assembly is matched with the transmission shaft to drive the two groups of transmission shafts with opposite thread rotating directions to synchronously rotate, the rubber chuck is controlled to move in a centering manner to approach the terminal, the centering clamping is realized through the centering movement of the rubber chuck, the force value conduction deviation caused by clamping deviation is avoided, and meanwhile, the clamping precision is improved. Under the shape of the rubber chuck and the flexible rubber material, the rubber chuck has certain deformation redundancy, and when the rubber chuck is in contact with the terminal and continuously applies clamping force, gaps in the surface of the terminal can be tightly filled to form wrapping type clamping, so that the damage of rigid clamping to the terminal is avoided, the motor terminals with different sizes and shapes can be adapted, the clamp does not need to be frequently replaced, and the working efficiency is improved. And the detection efficiency and the adaptation range are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of tensile force measurement technology, specifically to a device for detecting the pull-out force of motor terminals. Background Technology

[0002] In the motor manufacturing process, the motor terminals are key components connecting the motor to the external circuit. Their connection reliability directly determines the overall operational stability and service life of the motor. The terminal pull-out force is one of the core indicators for measuring the reliability of the terminal connection. Therefore, the pull-out force test of the motor terminals is an indispensable and important process in the quality control of motor production.

[0003] Currently, the motor terminal pull-out force testing devices used in the industry are gradually revealing many technical defects in actual testing operations, making it difficult to meet the testing requirements of high precision, high efficiency, and stable reliability. Specific problems are as follows:

[0004] Firstly, the clamping adaptability is poor, making it incompatible with the testing of terminals of different specifications. Existing testing devices mostly use fixed-structure clamps with relatively limited clamping dimensions and surface shapes, only suitable for specific motor terminal specifications. When faced with motor terminals of different models, sizes, or shapes, frequent clamp replacements are necessary, increasing equipment setup time, reducing testing efficiency, and affecting testing accuracy due to installation errors during clamp replacement. Furthermore, some clamps use rigid clamping surfaces, which can easily scratch and damage the terminal surface during clamping, compromising the terminal's appearance and structural integrity, and even affecting its original connection performance, resulting in test results that do not accurately reflect the actual pull-out force. Moreover, most clamps lack a centering clamping design, easily causing terminal misalignment during clamping, resulting in the subsequent pull force not aligning with the terminal axis, further exacerbating testing errors.

[0005] Secondly, the clamping force adjustment lacks flexibility and is difficult to adapt to the clamping requirements of different terminals. Motor terminals vary in material and structural strength, resulting in different clamping force requirements. Existing testing devices mostly use mechanical rigid clamping mechanisms, relying on manual adjustment of bolts or replacement of springs for clamping force adjustment. This method has low precision, is cumbersome, and cannot adjust the clamping force in real time according to the actual condition of the terminals. When the clamping force is too small, the terminals are prone to loosening during tensile testing, leading to test interruption; when the clamping force is too large, it will directly cause terminal deformation or damage, similarly affecting the accuracy and effectiveness of the test.

[0006] Third, the anti-detachment performance is weak, and the terminal is prone to detaching from the clamp during the testing process. During the pull-out force test, as the pull force gradually increases, the pulling force on the terminal continuously increases, and the single clamp structure of the existing testing device is difficult to maintain a stable grip on the terminal. Especially when the pull force approaches the terminal's pull-out limit, the terminal is very likely to detach from the clamp, which not only leads to the failure of the test and requires retesting, wasting time and manpower, but also damages the components of the testing device due to the impact force at the moment of terminal detachment, and may even cause safety hazards.

[0007] Therefore, this invention proposes a motor terminal pull-out force detection device to solve the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a motor terminal pull-out force detection device to solve the problems mentioned in the background section.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a motor terminal pull-out force detection device, comprising: a testing machine and a first component mounted thereon, the first component comprising: a positioning shell disposed on the testing machine, radial grooves fixedly connected to both sides of the inner cavity of the positioning shell, an axial groove disposed in the middle of the radial grooves, the axial grooves being fixedly connected to the positioning shell, an axial rack being slidably connected in the axial grooves, the axial rack extending downward through and slidably connected in the positioning shell, the end of the axial rack near the positioning shell being U-shaped, and one inner wall being rack-shaped;

[0010] The first component also includes: a gear rotatably connected to the axial groove, the gear meshing with the rack on the inner wall of the axial rack, a return spring fixedly connected to the bottom of the inner wall of the axial rack, and the end of the return spring away from the axial rack fixedly connected to the axial groove.

[0011] The second component is used to adapt to different terminals for elastic clamping.

[0012] Preferably, a single-column frame is fixedly connected to the testing machine, and a transmission group is provided inside the single-column frame. The transmission group consists of a drive screw, symmetrical guide columns, and a transmission beam. A drive fixture is provided at the lower end of the transmission group and is connected to it for transmission.

[0013] Preferably, two radial grooves are symmetrically arranged around the central axis of the positioning shell. One radial groove has a radial rack A slidably connected to it, and the other radial groove has a radial rack B slidably connected to it. The ends of the radial racks A and B away from the axial groove are fixedly connected to a connecting body. The connecting body is L-shaped, and the end of the connecting body away from the radial groove is fixedly connected to an auxiliary chuck.

[0014] Preferably, the radial rack A is U-shaped at one end near the axial groove, and a rack is provided on the upper end of its inner wall. The rack meshes with a gear. The radial rack B is U-shaped at one end near the axial groove, and a rack is provided on the lower end of its inner wall. The rack meshes with a gear. The radial rack A and radial rack B are staggered. The auxiliary chuck is semi-circular at one end away from the connecting body.

[0015] Preferably, the second component includes: a base frame fixedly connected to the axial groove extension end, a drive motor fixedly connected inside the base frame, the drive motor being controlled by an external controller, a drive wheel fixedly connected to the output shaft of the drive motor, a transmission belt engaged with the outer ring of the drive wheel, a driven wheel disposed directly above the drive wheel, the outer ring of the driven wheel being synchronously engaged with the transmission belt, and transmission shafts fixedly connected to both sides of the driven wheel.

[0016] Preferably, the drive wheel and the driven wheel are on a vertical line, and the threads of the two drive shafts are opposite to each other.

[0017] Preferably, both sets of drive shafts are connected to a drive body on their outer rings. The drive body is U-shaped, and a guide block is fixedly connected to the inner surface of the drive body on the side away from the drive shaft. A guide rail is fixedly connected to the center of the base frame on the side away from the axial rack, and the two guide blocks are slidably connected to both sides of the guide rail.

[0018] Preferably, an auxiliary frame is fixedly connected to the side of the transmission body away from the guide block, a slider is slidably connected inside the auxiliary frame, an auxiliary spring is provided between the slider and the auxiliary frame, the two ends of the auxiliary spring are fixedly connected to the auxiliary frame and the slider respectively, and a rubber clamp is fixedly connected to the side of the slider away from the auxiliary frame.

[0019] Preferably, the inner cavity of the auxiliary frame contains magnetorheological fluid, and the inner wall is provided with an electromagnetic coil controlled by an external controller, and the side of the rubber clamp away from the slider is serrated.

[0020] Compared with the prior art, the present invention provides a motor terminal pull-out force detection device, which has the following beneficial effects:

[0021] 1. Through the setting of the second component, driven by the drive motor, and in coordination with the transmission, the two sets of drive shafts with opposite screw directions rotate synchronously, controlling the rubber chuck to move towards the terminal. The centering movement of the rubber chuck achieves centered clamping, avoiding force transmission deviation caused by clamping offset. At the same time, the shape of the rubber chuck and the flexible rubber material itself have a certain deformation redundancy. When in contact with the terminal and continuously applying clamping force, it can tightly fill the gaps on the terminal surface, forming a wrap-around clamping. This avoids damage to the terminal caused by rigid clamping and can adapt to motor terminals of different sizes and shapes. There is no need to frequently change the clamps, which significantly improves the detection efficiency and the range of adaptation.

[0022] 2. Through the cooperation of the magnetorheological fluid and the electromagnetic coil inside the auxiliary frame, a dual clamping guarantee of elastic clamping and rigid limiting is formed. After the rubber clamp and the terminal are initially attached, the external controller can adjust the magnetic field strength of the electromagnetic coil to change the solidification state of the magnetorheological fluid in the auxiliary frame, thereby adjusting the movement limit of the slider to ensure the stability of the slider position and clamping force. When it is necessary to adjust the clamping force, the magnetic field can be weakened to change the state of the magnetorheological fluid. Combined with the elastic reset effect of the auxiliary spring, the rubber clamp can be finely adjusted. This avoids the problems of uncontrollable clamping force and easy loosening due to vibration in traditional mechanical clamping. It can also flexibly adjust the clamping force according to the material characteristics of the terminal to prevent the terminal from being damaged by excessive clamping or the terminal from being displaced during testing due to excessive clamping. This ensures the tension stability and controllability of the terminal wire during the testing process.

[0023] 3. Through the setting of the first component, with the auxiliary clamp and rubber clamp, a double clamping structure is formed, which has a dynamic anti-drop function. Before testing, the terminal head is clamped in the semi-circular groove of the auxiliary clamp to achieve initial positioning. During the test, when the driving clamp pulls down the wire to apply the terminal pull force, the end of the terminal is fixed by the rubber clamp. The pull force will drive the second component to move down as a whole, thereby driving the axial rack to move down. The cooperation of the axial rack and multiple components such as radial rack A and radial rack B makes the two rubber clamps move further in center, forming the effect that the more pull force is applied to the bottom of the terminal head, the tighter the terminal clamping part clamps. This effectively avoids the problem of the terminal falling off the clamp due to excessive force in the traditional single clamping structure. Even under extreme tensile conditions, the double clamping structure can still fix the terminal through two redundant force points to prevent test interruption or data loss, and ensure the continuity of the testing process and the accuracy of the data.

[0024] 4. Through the coordinated operation of the first and second components, a force transmission path is formed between the auxiliary chuck, the rubber chuck, and the drive fixture. The transmission group drives the drive fixture to move linearly upwards and downwards, ensuring that the pulling force direction when pulling down the wire is vertically downwards. At the same time, the rubber chuck moves in alignment with the terminal axis through the transmission shaft and the transmission body. The auxiliary chuck's clamping of the terminal head is always synchronously along the terminal axis. Together, they ensure that the terminal is always in a centered position on the axis during the testing process, effectively avoiding the "off-center load" problem caused by the deviation of the pulling force direction and the tilt of the terminal clamping in traditional devices. This ensures that the applied pull-out force is transmitted completely along the connection axis between the terminal and the wire, ensuring that the maximum pull-out force, holding force, and other data obtained by the test are consistent with the actual working conditions, and significantly improving the testing accuracy. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a partial structural diagram of the present invention;

[0027] Figure 3 This is a partial cross-sectional internal view of the present invention;

[0028] Figure 4 This is an internal structural view of the positioning shell of the present invention;

[0029] Figure 5 This is a partial structural diagram of the first component of the present invention;

[0030] Figure 6 This is a structural diagram of the second component of the present invention;

[0031] Figure 7 This is a structural diagram of the second component of the present invention from another angle;

[0032] Figure 8 This is a disassembled structural diagram of the second component of the present invention;

[0033] Figure 9 This is a partial front view of the structure of the present invention.

[0034] In the picture:

[0035] 11. Testing machine; 12. Single-column frame; 13. Transmission assembly; 14. Drive fixture;

[0036] First Component

[0037] 21. Positioning shell; 22. Radial groove; 23. Axial groove; 24. Axial rack; 25. Gear; 26. Return spring; 27. Radial rack A; 28. Radial rack B; 29. ​​Integrated unit; 210. Auxiliary chuck;

[0038] Second component

[0039] 31. Base frame; 32. Drive motor; 33. Drive wheel; 34. Transmission belt; 35. Driven wheel; 36. Transmission shaft; 37. Transmission body; 38. Guide rail; 39. Guide block; 310. Auxiliary frame; 311. Auxiliary spring; 312. Slider; 313. Rubber clamp. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0042] Example

[0043] Please refer to Figures 1 to 5 As shown:

[0044] To address the problems mentioned in the technical solutions, this application provides a motor terminal pull-out force detection device, including: a testing machine 11 and a first component mounted thereon. The first component includes: a positioning shell 21 disposed on the testing machine 11, radial grooves 22 fixedly connected to both sides of the inner cavity of the positioning shell 21, an axial groove 23 disposed in the middle of the radial grooves 22, the axial groove 23 fixedly connected to the positioning shell 21, and an axial rack 24 slidably connected in the axial groove 23. The axial rack 24 is used to trigger the radial racks A27 and B28 to move towards the middle of the positioning shell 21 when it moves downward to further assist in the fastening of the terminal. The axial rack 24 extends downward through and is slidably connected in the positioning shell 21. The end of the axial rack 24 near the positioning shell 21 is U-shaped, and one inner wall is rack-shaped.

[0045] The first component also includes: a gear 25 rotatably connected in the axial groove 23, the gear 25 meshing with the rack on the inner wall of the axial rack 24, and a return spring 26 fixedly connected to the bottom of the inner wall of the axial rack 24, with one end of the return spring 26 away from the axial rack 24 fixedly connected to the axial groove 23.

[0046] The second component is used to adapt to different terminals for elastic clamping.

[0047] A single-column frame 12 is fixedly connected to the testing machine 11. A transmission group 13 is installed inside the single-column frame 12. The transmission group 13 is driven by an external controller to adjust the lifting of the first component and the second component. The transmission group 13 consists of a drive screw, symmetrical guide columns and a transmission beam. A drive clamp 14 is installed at the lower end of the transmission group 13 and is connected to it. The drive clamp 14 is used to apply tension evenly and cooperates with the testing machine 11 to monitor the change of force value in real time until the terminal is disconnected, the wire is broken or the preset force value is reached.

[0048] Two radial grooves 22 are symmetrically arranged around the central axis of the positioning shell 21. One radial groove 22 is slidably connected to a radial rack A27, and the other radial groove 22 is slidably connected to a radial rack B28. The ends of the radial racks A27 and B28 away from the axial groove 23 are fixedly connected to a connecting body 29. The connecting body 29 is L-shaped. The end of the connecting body 29 away from the radial groove 22 is fixedly connected to an auxiliary chuck 210, which is used to assist in positioning the terminal head.

[0049] The radial rack A27 is U-shaped at one end near the axial groove 23, and a rack is provided on the upper end of the inner wall. The rack meshes with the gear 25. The radial rack B28 is U-shaped at one end near the axial groove 23, and a rack is provided on the lower end of the inner wall. The rack meshes with the gear 25. The radial racks A27 and B28 are staggered. The auxiliary chuck 210 is semi-circular at one end away from the connecting body 29.

[0050] A further embodiment: Please refer to Figures 6 to 9 As shown:

[0051] The second component includes: a base frame 31 fixedly connected to the extended end of the axial groove 23; a drive motor 32 fixedly connected inside the base frame 31; the drive motor 32 being controlled by an external controller; a drive wheel 33 fixedly connected to the output shaft of the drive motor 32; a transmission belt 34 meshing with the outer ring of the drive wheel 33; the transmission belt 34 synchronizing the drive wheel 33 with the driven wheel 35 and the transmission shaft 36; a driven wheel 35 positioned directly above the drive wheel 33; the outer ring of the driven wheel 35 synchronizing with the transmission belt 34; and transmission shafts 36 fixedly connected to both sides of the driven wheel 35.

[0052] The drive wheel 33 and the driven wheel 35 are on a vertical line, and the threads of the two drive shafts 36 are opposite to each other.

[0053] Both sets of drive shafts 36 have drive bodies 37 connected to their outer rings. The drive bodies 37 are U-shaped. A guide block 39 is fixedly connected to the inner surface of the side of the drive body 37 away from the drive shaft 36. A guide rail 38 is fixedly connected to the middle of the side of the base frame 31 away from the axial rack 24. The two guide blocks 39 are slidably connected to both sides of the guide rail 38.

[0054] An auxiliary frame 310 is fixedly connected to the side of the transmission body 37 away from the guide block 39. An electromagnetic coil inside the auxiliary frame 310 is connected to an external controller to control the solidification state of the magnetorheological fluid. A slider 312 is slidably connected inside the auxiliary frame 310. An auxiliary spring 311 is provided between the slider 312 and the auxiliary frame 310. The two ends of the auxiliary spring 311 are fixedly connected to the auxiliary frame 310 and the slider 312, respectively. A rubber chuck 313 is fixedly connected to the side of the slider 312 away from the auxiliary frame 310. The rubber chuck 313 is used to position the end of the terminal for pull-out force detection. The material of the rubber chuck 313 provides a certain redundancy when clamping the terminal, so that it can fit tightly with terminals of different shapes.

[0055] The inner cavity of the auxiliary frame 310 contains magnetorheological fluid, and the inner wall is equipped with an electromagnetic coil controlled by an external controller. The side of the rubber chuck 313 away from the slider 312 is serrated.

[0056] The working principle of all the content in the above embodiments is as follows:

[0057] The following is the working process of the second component:

[0058] In use, the operator places the end of the terminal connected to the wire in the middle of the two rubber clamps 313, starts the drive motor 32, and drives the drive wheel 33 to rotate forward. During the forward rotation of the drive wheel 33, the transmission belt 34 meshing with it synchronously drives the driven wheel 35 to rotate forward under the transmission force. Indirectly, the rotation of the driven wheel 35 drives the transmission shaft 36 to rotate forward within the base frame 31. Since the threads of the two sets of transmission shafts 36 are opposite, when the transmission shaft 36 rotates, the transmission body 37 connected to it moves towards the driven wheel 35 under the transmission action, thereby driving the auxiliary frame 310 fixedly connected to the transmission body 37 to move in the center, and further moving the guide rail 38 and Under the constraint of guide block 39, the auxiliary transmission body 37 and auxiliary frame 310 move in a straight and stable manner. When the auxiliary frame 310 moves to the center until it clamps the terminal in the middle, the auxiliary frame 310 continues to exert a centering force, which makes the surface of the rubber chuck 313 further fit with the terminal. Since the rubber material has redundancy, when the rubber chuck 313 is tightly fitted with the terminal, under the action of the shape and material of the rubber chuck 313, it tightly fills the gap of the terminal and limits its movement. The external controller controls the magnetic field of the electromagnetic coil to solidify the magnetorheological fluid filled in the auxiliary frame 310, which limits the movement of the rubber chuck 313 and the slider 312, and helps stabilize the clamping force of the two rubber chucks 313 on the terminal.

[0059] With the second component, driven by the drive motor 32 and in conjunction with the transmission, the two sets of transmission shafts 36 with opposite thread directions rotate synchronously, controlling the rubber chuck 313 to move towards the terminal. The centering movement of the rubber chuck 313 achieves centered clamping, avoiding force transmission deviation caused by clamping offset. At the same time, the shape and flexible rubber material of the rubber chuck 313 have a certain deformation redundancy. When in contact with the terminal and continuously applying clamping force, it can tightly fill the gaps on the terminal surface, forming a wrap-around clamping. This avoids damage to the terminal caused by rigid clamping and can adapt to motor terminals of different sizes and shapes. It eliminates the need for frequent clamp replacements, significantly improving detection efficiency and adaptability.

[0060] The combination of magnetorheological fluid and electromagnetic coil inside the auxiliary frame 310 forms a dual clamping guarantee of elastic clamping and rigid limiting. After the rubber clamp 313 is initially attached to the terminal, the external controller can adjust the magnetic field strength of the electromagnetic coil to change the solidification state of the magnetorheological fluid inside the auxiliary frame 310, thereby adjusting the movement limit of the slider 312 to ensure the stability of the position of the slider 312 and the clamping force. When it is necessary to adjust the clamping force, the magnetic field can be weakened to change the state of the magnetorheological fluid. Combined with the elastic reset effect of the auxiliary spring 311, the rubber clamp 313 can be finely adjusted. This avoids the problems of uncontrollable clamping force and easy loosening due to vibration in traditional mechanical clamping. It can also flexibly adjust the clamping force according to the material characteristics of the terminal to prevent damage to the terminal due to excessive clamping or displacement of the terminal during testing due to excessive clamping. This ensures the tension stability and controllability of the terminal wire during the testing process.

[0061] Please refer to the above work process. Figures 6 to 9 .

[0062] The following is the working process of the first component:

[0063] In use, the terminal head is engaged in two sets of auxiliary clamps 210 for initial auxiliary positioning of the terminal. During the pulling force test, the drive clamp 14 pulls one end of the wire downwards, while the terminal is held and fixed by the second component through the rubber clamp 313. The pulling force applied to the wire by the drive clamp 14 is transmitted to the second component, causing it to move downwards as a whole. Through the fixed connection between the base frame 31 and the axial rack 24, the downward movement of the base frame 31 pulls the axial rack 24 downwards synchronously. When the axial rack 24 moves downwards, the return spring 26 connected to it is stretched to store elastic potential energy. Subsequently, the downward movement of the axial rack 24 causes the gear 25 meshing with it to reverse. The rotation of gear 25 in the opposite direction drives the radial racks A27 and B28 on both sides of its meshing to move towards the center. The movement of radial racks A27 and B28 causes the connecting body 29 and the auxiliary chuck 210, which are fixedly connected to it, to move towards the center of the positioning shell 21. During the centering movement, the auxiliary chuck 210 further clamps the terminal head to assist in the stability of the terminal during the pull force test, and avoids the terminal from falling off due to excessive force during the pull force test. The auxiliary chuck 210 assists in keeping the terminal from falling off the fixture during the test, and avoids test interruption or data loss due to falling off. The double clamping forms a redundant force point.

[0064] With the first component set up, and the auxiliary clamp 210 set up in conjunction with the rubber clamp 313, a double clamping structure is formed, which has a dynamic anti-drop function. Before testing, the terminal head is snapped into the semi-circular groove of the auxiliary clamp 210 to achieve initial positioning. During the test, when the driving clamp 14 pulls down the wire to apply the terminal pull force, the end of the terminal is fixed by the rubber clamp 313. The pull force will drive the second component to move down as a whole, thereby driving the axial rack 24 to move down. The cooperation of the axial rack 24 with multiple components such as the radial rack A27 and the radial rack B28 makes the two rubber clamps 313 move further in center, forming the effect that the more pull force is applied to the bottom of the terminal head, the tighter the terminal clamping part clamps. This effectively avoids the problem of the terminal falling off the clamp due to excessive force in the traditional single clamping structure. Even under extreme tensile conditions, the double clamping structure can still fix the terminal through two redundant force points to prevent test interruption or data loss, and ensure the continuity of the testing process and the accuracy of the data.

[0065] Through the coordinated operation of the first and second components, a force transmission path is formed between the auxiliary chuck 210, the rubber chuck 313, and the drive clamp 14. The transmission group 13 drives the drive clamp 14 to move linearly, ensuring that the pulling force direction when pulling down the wire is vertically downward. At the same time, the rubber chuck 313 moves in alignment with the transmission body 37 through the transmission shaft 36, keeping it aligned with the terminal axis. The auxiliary chuck 210 clamps the terminal head synchronously along the terminal axis. Together, they ensure that the terminal is always centered on the axis during the testing process, effectively avoiding the "off-center load" problem caused by the deviation of the pulling force direction and the tilt of the terminal clamp in traditional devices. This ensures that the applied pull-out force is transmitted completely along the connection axis between the terminal and the wire, ensuring that the maximum pull-out force, holding force, and other data obtained by the test are consistent with the actual working conditions, and significantly improving the testing accuracy.

[0066] Please refer to the above work process. Figures 1 to 5 .

[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the pull-out force of motor terminals, comprising: The testing machine (11) and the first component mounted thereon are characterized in that: the first component includes: a positioning shell (21) disposed on the testing machine (11), a radial groove (22) fixedly connected to both sides of the inner cavity of the positioning shell (21), an axial groove (23) disposed in the middle of the radial groove (22), the axial groove (23) fixedly connected to the positioning shell (21), an axial rack (24) slidably connected to the axial groove (23), the axial rack (24) extending downward through and slidably connected to the positioning shell (21), the end of the axial rack (24) near the positioning shell (21) being U-shaped, and one inner wall being rack-shaped; The first component also includes: a gear (25) rotatably connected in the axial groove (23), the gear (25) meshing with the rack on the inner wall of the axial rack (24), a return spring (26) fixedly connected to the bottom of the inner wall of the axial rack (24), and the end of the return spring (26) away from the axial rack (24) fixedly connected to the axial groove (23); The second component is used to adapt to different terminals for elastic clamping.

2. The motor terminal pull-out force detection device according to claim 1, characterized in that: A single-column frame (12) is fixedly connected to the testing machine (11). A transmission group (13) is provided inside the single-column frame (12). The transmission group (13) consists of a drive screw, symmetrical guide columns and a transmission beam. A drive fixture (14) is provided at the lower end of the transmission group (13) and is connected to it for transmission.

3. The motor terminal pull-out force detection device according to claim 1, characterized in that: Two radial grooves (22) are symmetrically arranged around the central axis of the positioning shell (21). One radial groove (22) is slidably connected to a radial rack A (27), and the other radial groove (22) is slidably connected to a radial rack B (28). The ends of the radial racks A (27) and B (28) away from the axial groove (23) are fixedly connected to a connecting body (29). The connecting body (29) is L-shaped, and the end of the connecting body (29) away from the radial groove (22) is fixedly connected to an auxiliary chuck (210).

4. The motor terminal pull-out force detection device according to claim 3, characterized in that: The radial rack A (27) is U-shaped at one end near the axial groove (23), and a rack is provided on the upper end of the inner wall. The rack meshes with the gear (25). The radial rack B (28) is U-shaped at one end near the axial groove (23), and a rack is provided on the lower end of the inner wall. The rack meshes with the gear (25). The radial rack A (27) and the radial rack B (28) are staggered. The auxiliary chuck (210) is semi-circular at one end away from the connecting body (29).

5. The motor terminal pull-out force detection device according to claim 1, characterized in that: The second component includes: a base frame (31) fixedly connected to the extended end of the axial groove (23), a drive motor (32) fixedly connected inside the base frame (31), the drive motor (32) being controlled by an external controller, a drive wheel (33) fixedly connected to the output shaft of the drive motor (32), a drive belt (34) being engaged with the outer ring of the drive wheel (33), a driven wheel (35) being arranged directly above the drive wheel (33), the outer ring of the driven wheel (35) being engaged with the drive belt (34) synchronously, and a drive shaft (36) being fixedly connected to both sides of the driven wheel (35).

6. The motor terminal pull-out force detection device according to claim 5, characterized in that: The drive wheel (33) and the driven wheel (35) are on a vertical line, and the threads of the two drive shafts (36) are opposite to each other.

7. The motor terminal pull-out force detection device according to claim 5, characterized in that: Both sets of drive shafts (36) are connected to a drive body (37) on their outer rings. The drive body (37) is U-shaped. A guide block (39) is fixedly connected to the inner surface of the drive body (37) away from the drive shaft (36). A guide rail (38) is fixedly connected to the middle of the side of the base frame (31) away from the axial rack (24). The two guide blocks (39) are slidably connected to both sides of the guide rail (38).

8. The motor terminal pull-out force detection device according to claim 7, characterized in that: An auxiliary frame (310) is fixedly connected to the side of the transmission body (37) away from the guide block (39). A slider (312) is slidably connected inside the auxiliary frame (310). An auxiliary spring (311) is provided between the slider (312) and the auxiliary frame (310). The two ends of the auxiliary spring (311) are fixedly connected to the auxiliary frame (310) and the slider (312) respectively. A rubber clamp (313) is fixedly connected to the side of the slider (312) away from the auxiliary frame (310).

9. The motor terminal pull-out force detection device according to claim 8, characterized in that: The inner cavity of the auxiliary frame (310) contains magnetorheological fluid, and the inner wall is provided with an electromagnetic coil controlled by an external controller. The side of the rubber clamp (313) away from the slider (312) is set in a sawtooth shape.

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