A performance testing bench for magnetic yoke coil assembly

Abstract

The present application relates to the field of yoke coil assemblies, and specifically discloses a yoke coil assembly performance test bench. The yoke coil assembly performance test bench includes: a frame; a positioning seat for placing the yoke coil assembly and plugging it into the inner ring of the bearing; a motor for driving the positioning seat to rotate; a torque meter installed on the frame and connected between the motor and the positioning seat; a limiter for limiting the rotation of the insulating shell; a probe for contacting the upper bracket; a driving mechanism installed on the frame and used to drive the probe close to the upper bracket; a safety measuring instrument having a first input terminal and a second input terminal, wherein the first input terminal is electrically connected to the probe, and the second input terminal is used to connect the wire. The test bench of the present application can perform comprehensive tests on multiple performances of the yoke coil assembly, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of yoke coil assemblies, and in particular to a yoke coil assembly performance testing platform. Background Art

[0002] The yoke coil assembly is the control unit of the electronically controlled silicone oil fan clutch. It receives square wave signals of different duty cycles from the engine ECU and generates magnetism during the high-level period of the signal to affect the switching of the valve plate in the fan clutch, thereby affecting the amount of silicone oil in the clutch working chamber, thereby achieving stepless speed change of the fan and significantly reducing energy consumption.

[0003] like Figure 1 As shown, the related art discloses a yoke coil assembly 1, which includes an insulating housing 101, a metal housing 102, a yoke coil 103, a coil frame 104, a bearing 105, a junction box 106, and a wire 107. Among them, the metal housing 102 includes an upper bracket 1021 and a lower bracket 1022, the upper bracket 1021 and the lower bracket 1022 are both connected to the inner side of the insulating housing 101, the bearing 105 is connected to the inner side of the upper bracket 1021, the coil frame 104 is arranged between the upper bracket 1021 and the lower bracket 1022, and the yoke coil 103 is arranged inside the coil frame 104. The junction box 106 is connected to the outer side of the insulating housing 101, and the wire 107 is connected to the junction box 106 and is used to connect to the ECU port of the engine.

[0004] In order to ensure the working stability of the yoke coil assembly, it is necessary to carry out a number of performance tests such as safety testing and bearing resistance torque testing. In the past, different types of performance tests often needed to be carried out multiple times with the help of different tools, resulting in low testing efficiency and room for improvement. Summary of the invention

[0005] In order to improve the efficiency of detecting the performance of a yoke coil assembly, the present application provides a yoke coil assembly performance detection station.

[0006] The yoke coil assembly performance test bench provided in this application adopts the following technical solution:

[0007] A yoke coil assembly performance testing platform, comprising:

[0008] frame;

[0009] The positioning seat is used for placing the yoke coil assembly and plugging it into the inner ring of the bearing;

[0010] A motor, used for driving the positioning seat to rotate;

[0011] The torque meter is mounted on the frame and connected between the motor and the positioning seat;

[0012] A limiting member, used to limit the rotation of the insulating housing;

[0013] a probe for contacting the upper bracket;

[0014] A driving mechanism, mounted on the frame and used to drive the probe to approach the upper bracket;

[0015] A safety measuring instrument comprises a first input terminal and a second input terminal, wherein the first input terminal is electrically connected to a probe, and the second input terminal is used to connect a wire.

[0016] By adopting the above technical solution, the yoke coil assembly is first placed on the positioning seat, and then the driving mechanism is started to make the probe approach and press against the upper bracket. The safety measuring instrument can detect the insulation resistance between the electrical circuit inside the yoke coil assembly and the metal shell, and at the same time detect the voltage resistance performance of the electrical circuit, and then detect the current and resistance value of the yoke coil. After the probe is reset, the motor is started to drive the positioning seat to rotate, and the bearing resistance torque of the yoke coil assembly can be detected by the torque meter.

[0017] The testing platform of the present application can perform comprehensive testing on multiple performances of the yoke coil assembly, and the testing efficiency is greatly improved.

[0018] Optionally, the limiting member includes a base and two limiting plates connected to the upper side of the base, a junction box is inserted between the two limiting plates, and the base is connected to the frame by fastening bolts.

[0019] By adopting the above technical solution, the limiter can limit the insulating housing of the yoke coil assembly, so that the resistance torque detection of the bearing can be carried out smoothly. In addition, the limiter has a simple structure and is easy to disassemble and assemble.

[0020] Optionally, the base is provided with a waist-shaped hole through which a fastening bolt passes, and the frame is provided with a slide groove for the base to be inserted into, and the slide groove enables the base to slide toward or away from the positioning seat.

[0021] By adopting the above technical solution, on the one hand, the base is inserted into the slide groove, so that the position of the limiting member will not shift after being subjected to force, thereby ensuring the limiting effect on the insulating shell; on the other hand, the position of the limiting member can be adjusted to increase the scope of application.

[0022] Optionally, the driving mechanism includes a pressure head for fixing the probe, a first driving member for driving the pressure head to move up and down, a bracket for fixing the first driving member, and a second driving member for driving the bracket to slide horizontally.

[0023] By adopting the above technical solution, before or after testing, the pressure head is displaced relative to the positioning seat, which facilitates the placement of the yoke coil assembly.

[0024] Optionally, at least three probes are arranged at circumferential intervals around the axis of the pressure head.

[0025] By adopting the above technical solution, on the one hand, it is ensured that the probes are in full contact with the metal shell, and on the other hand, if one of the probes is damaged during long-term use, the other two can still be used normally, thereby ensuring the redundant contact capability.

[0026] Optionally, it also includes:

[0027] Hall element, for mounting inside the junction box and with a back magnet;

[0028] The induction coil is fixedly connected to the positioning seat;

[0029] The induction coil comprises a fixing plate and a plurality of convex pieces arranged at intervals on the outer side of the fixing plate, and the convex pieces are used to extend between the lower bracket and the insulating shell.

[0030] By adopting the above technical solution, during the bearing resistance torque detection process, the convex piece passes through the Hall element, which will interfere with the magnetic field, thereby generating a corresponding square wave electrical signal. After reading the electrical signal and calculating it, the rotation speed of the convex piece, that is, the Hall speed, can be obtained. Compare the Hall speed and the motor speed. If they are consistent, it means that the resistance torque detection is normal.

[0031] Optionally, the protrusion is slidably connected to a fixed plate, the fixed plate is provided with a through hole for the protrusion to slide up and down, one side of the protrusion is connected to a limit block abutting against the upper side of the fixed plate, and a lifting mechanism is provided at the bottom of the protrusion, and the lifting mechanism is used to drive the protrusion to move upward so that the bearing is separated from the positioning seat.

[0032] By adopting the above technical solution, after the inspection is completed, the lifting mechanism can push the convex piece upward to facilitate the rapid removal of the yoke coil assembly and the convenience of the staff to take it.

[0033] Since the protrusions extend between the lower bracket and the insulating shell and are evenly distributed in plurality, they can act as ejectors to apply a uniform ejection force to the yoke coil assembly, making it easier for the yoke coil assembly to be removed without causing damage to the yoke coil assembly.

[0034] Optionally, the lifting mechanism comprises:

[0035] A fixed frame, fixedly connected to the frame;

[0036] A lifting ring is vertically slidably connected to the fixing frame and is located at the lower side of the protruding piece;

[0037] A rotating ring is arranged at the lower side of the lifting ring and is rotatably connected to the frame;

[0038] A gear ring, fixedly connected to the outer side of the rotating ring;

[0039] a rack, meshing with the gear ring;

[0040] A third driving member is used to drive the rack to move so as to drive the gear ring to rotate;

[0041] A plurality of lifting blocks are arranged at intervals in the circumferential direction on the lower side of the lifting ring, and the lifting blocks are provided with a first inclined surface;

[0042] A plurality of rotating blocks corresponding to the lifting blocks are arranged at intervals in the circumferential direction on the upper side of the rotating ring, and the rotating blocks are provided with a second inclined surface matched with the first inclined surface.

[0043] By adopting the above technical solution, after the detection is completed, the third driving member is started to drive the rack to move, so that the gear ring rotates, and then drives the rotating block to approach the lifting block, and the first inclined surface and the second inclined surface contact to generate an extrusion force, thereby generating an upward thrust on the lifting ring, so that the protrusion is lifted.

[0044] The lifting mechanism will not contact the convex piece during the detection process, and will not hinder the rotation of the positioning seat.

[0045] Optionally, the limiting member includes a connecting shaft fixedly connected to the fixing frame, two sliding plates slidably sleeved on the connecting shaft, a limiting plate fixedly connected to both ends of the connecting shaft, and a limiting spring arranged between the sliding plates and the limiting plates, the junction box is inserted between the two sliding plates, and a third inclined surface is arranged at the lower ends of the two sliding plates facing each other;

[0046] The upper side of the lifting ring is connected with a support seat, and both sides of the upper end of the support seat are provided with a fourth inclined surface matched with the third inclined surface.

[0047] By adopting the above technical solution, the two sliding plates can be close to the junction box, thereby preventing the junction box from colliding with the limiter during the detection process and causing damage. After the detection is completed, the lifting ring moves up to drive the support seat to be stuck between the two sliding plates, and then the two sliding plates are separated, thereby eliminating the resistance of the sliding plates to the yoke coil assembly. In addition, when placing the yoke coil assembly, the two sliding plates can be opened by hand.

[0048] Optionally, a V-shaped notch is provided on the side of the protruding piece, and when the limiting block abuts against the fixing plate, the notch is directly opposite to the inner wall of the through hole, the opening width of the notch is greater than the depth of the through hole, and a weight-adding block is fixedly connected to the lower end of the protruding piece.

[0049] By adopting the above technical solution, on the one hand, during the rotation of the positioning seat, the inner edge of the through hole of the fixed plate is stuck in the notch under the action of centrifugal force, and cooperates with the weight block to maintain the position stability of the protrusion, so that the protrusion is not easy to shake up and down; on the other hand, the weight block can limit the upward movement position of the protrusion to prevent the protrusion from accidentally falling off the fixed plate.

[0050] In summary, this application has the following beneficial effects:

[0051] 1. The test bench of the present application can conduct comprehensive tests on multiple properties of the yoke coil assembly with high testing efficiency;

[0052] 2. Through the setting of the induction coil and the Hall element, the Hall speed is obtained and compared with the motor speed to ensure that the bearing resistance torque detection process is normal;

[0053] 3. The jacking mechanism is set up to facilitate the quick removal of the yoke coil assembly, making it easier for workers to take it and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of a yoke coil assembly of the background technology;

[0055] Figure 2 yes Figure 1 Schematic cross-sectional view along line AA;

[0056] Figure 3 It is a structural schematic diagram of a yoke coil assembly performance test bench according to Example 1 of the present application, and is used to show the front side;

[0057] Figure 4 It is a structural schematic diagram of a yoke coil assembly performance test bench according to Example 1 of the present application, and is used to show the back side;

[0058] Figure 5 It is a schematic front view of the partial structure of the yoke coil assembly performance testing platform of Example 1 of the present application;

[0059] Figure 6 is a cross-sectional schematic diagram of a yoke coil assembly performance testing station of Example 1 of the present application;

[0060] Figure 7 yes Figure 6 A magnified schematic diagram of the middle B area;

[0061] Figure 8 It is a structural schematic diagram of the positioning seat, the induction coil, the limiter and the connecting plate of Example 1 of the present application;

[0062] Fig. 9 is an exploded schematic diagram of the indenter and the probe of Example 1 of the present application;

[0063] Fig.10 It is a structural schematic diagram of a yoke coil assembly performance testing station according to Example 2 of the present application;

[0064] Fig.11 It is a structural schematic diagram of the positioning seat, the induction coil and the lifting mechanism of Example 2 of the present application;

[0065] Fig.12 yes Fig.11 Enlarged schematic diagram of the middle C area;

[0066] Fig.13 is a schematic diagram of the structure of the convex piece in Example 2 of the present application;

[0067] Fig.14 It is an exploded schematic diagram of the jacking mechanism of Example 2 of the present application.

[0068] Description of reference numerals: 1. yoke coil assembly; 101. insulating housing; 102. metal housing; 1021. upper bracket; 1022. lower bracket; 103. yoke coil; 104. coil frame; 105. bearing; 106. junction box; 107. wire;

[0069] 2. Frame; 21. Slide; 22. Table; 23. Connecting plate; 3. Positioning seat; 4. Motor; 5. Torque meter; 6. Stopper; 61. Base; 611. Waist-shaped hole; 62. Stopper plate; 63. Fastening bolt; 64. Connecting shaft; 65. Sliding plate; 651. Third inclined plane; 66. Stopper plate; 67. Stopper spring; 7. Probe; 8. Driving mechanism; 81. Press head; 811. Annular groove; 812. Wire outlet hole; 82. First driving member; 83. Second driving member; 84. Bracket; 85. Gland; 9. Safety measuring instrument; 91. First input terminal; 92. Second input terminal; 10. Hall element; 11. Induction coil; 111. Fixing plate; 1111. Through hole; 112. Lug; 1121. Notch; 113. Stopper block; 114. Weight-adding block;

[0070] 12. Lifting mechanism; 121. Fixed frame; 122. Lifting ring; 123. Rotating ring; 124. Gear ring; 125. Rack; 126. Third driving member; 127. Lifting block; 1271. First inclined plane; 128. Rotating block; 1281. Second inclined plane; 129. Spreading seat; 1291. Fourth inclined plane; 13. Controller; 14. Display screen;. DETAILED DESCRIPTION

[0071] The following is combined with Figure 3-14 This application is described in further detail.

[0072] An embodiment of the present application discloses a yoke coil assembly performance testing platform.

[0073] Embodiment 1:

[0074] Reference Figure 3 , Figure 4The performance testing platform of the yoke coil assembly 1 includes a frame 2, a positioning seat 3, a safety measuring instrument 9, a controller 13 and a display screen 14. The safety measuring instrument 9, the controller 13 and the display screen 14 are all fixedly mounted on the frame 2. The positioning seat 3 is used for placing the yoke coil assembly 1, the safety measuring instrument 9 is used for testing the safety performance of the yoke coil assembly 1, the controller 13 is used for receiving the electrical signal of the yoke coil assembly 1 and controlling the actions of various components, and the display screen 14 is used for displaying the test results.

[0075] Reference Figure 4 , Figure 5 The frame 2 includes a table 22 for performing a detection operation, and the positioning seat 3 is arranged on the upper side of the table 22. A probe 7 and a driving mechanism 8 for driving the probe 7 to approach the upper end of the yoke coil assembly 1 are arranged on one side of the positioning seat 3. The probe 7 is used to contact the upper bracket 1021 for safety performance detection.

[0076] Reference Figure 5 The driving mechanism 8 includes a pressure head 81 for fixing the probe 7, a first driving member 82 for driving the pressure head 81 to move up and down, a bracket 84 for fixing the first driving member 82, and a second driving member 83 for driving the bracket 84 to slide horizontally. In the embodiment of the present application, the first driving member 82 and the second driving member 83 are both cylinders; in other embodiments, the first driving member 82 and the second driving member 83 can also be other types of reciprocating driving structures, such as electric cylinders, motor screw components, etc.

[0077] The first driving member 82 is fixedly connected to the table 22, and its slide is fixedly connected to the bracket 84. Therefore, the first driving member 82 can drive the bracket 84 to approach or move away from the positioning seat 3 in the horizontal direction, so that the pressure head 81 is located directly above the positioning seat 3. The bracket 84 is Z-shaped, and the second driving member 83 is fixedly connected to the upper side of one end of the bracket 84 close to the positioning seat 3. The piston rod of the second driving member 83 vertically passes through the bracket 84 downward and is fixedly connected to the pressure head 81. Therefore, after the first driving member 82 drives the pressure head 81 to move horizontally to directly above the positioning seat 3, the second driving member 83 is driven to drive the pressure head 81 downward, so that the probe 7 is pressed against the upper bracket 1021, so as to facilitate safety performance testing.

[0078] Reference Figure 4 , Figure 5 The safety measuring instrument 9 has a first input terminal 91 and a second input terminal 92, wherein the first input terminal 91 is electrically connected to the probe 7, and the second input terminal 92 is used to connect the wire 107. The safety measuring instrument 9 can detect the insulation resistance between the electrical circuit inside the yoke coil assembly 1 and the metal shell, and detect the withstand voltage performance of the electrical circuit, the current and resistance value of the yoke coil 103.

[0079] Reference Figure 5 , Figure 6The cross section of the positioning seat 3 is convex, so that the smaller diameter portion of the upper end of the positioning seat 3 is inserted into the inner ring of the bearing 105, and the larger diameter portion of the lower end of the positioning seat 3 abuts against the lower end surface of the bearing 105. The lower end of the positioning seat 3 is connected to the torque meter 5 through a coupling, and the lower end of the torque meter 5 is connected to the motor 4, and the motor 4 is a servo motor. The table 22 is provided with a perforation, and a connecting plate 23 is provided at the perforation. The outer end of the connecting plate 23 is fixedly connected to the upper end surface of the table 22, and the inner end of the connecting plate 23 is rotatably connected to the coupling, and the upper end of the torque meter 5 is fixedly connected to the connecting plate 23. Starting the motor 4 can drive the positioning seat 3 to rotate, and then cooperate with the torque meter 5 to detect the resistance torque of the bearing 105.

[0080] Reference Figure 7 , Figure 8 In order to ensure the accuracy of the resistance torque detection, the lower end of the positioning seat 3 is fixedly connected with an induction coil 11, and the induction coil 11 includes a fixing plate 111 fixedly connected to the positioning seat 3. Six convex pieces 112 are fixedly connected to the upper side of the outer end of the fixing plate 111 at equal intervals around its axis. The convex pieces 112 are used to extend between the lower bracket 1022 and the insulating shell 101. The thickness of the convex piece 112 is less than the width of the cavity between the outer wall of the lower bracket 1022 and the inner wall of the insulating shell 101, so that during the rotation of the positioning seat 3, the convex piece 112 will not contact the yoke coil assembly 1, and thus will not cause wear to the yoke coil assembly 1.

[0081] The yoke coil assembly 1 itself has a Hall element 10, which is fixedly mounted on the bottom of the junction box 106 and has a back magnet. Since the position of the Hall element 10 corresponds to that of the convex piece 112, each convex piece 112 will interfere with the magnetic field when it rotates through the Hall element 10, thereby generating a corresponding square wave electrical signal. After the controller 13 reads the electrical signal and performs calculation, the rotation speed of the convex piece 112, i.e., the Hall rotation speed, can be obtained. Compare the Hall rotation speed with the rotation speed of the motor 4. If they are consistent, it means that the resistance torque detection is normal.

[0082] Reference Figure 6 , Figure 8 In order to prevent the insulating housing 101 from rotating to ensure the smooth detection of the resistance torque, a limiting member 6 is provided on one side of the positioning seat 3. The limiting member 6 includes a base 61 and two limiting plates 62 respectively fixedly connected to both sides of the upper end of the base 61. The two limiting plates 62 are arranged in parallel and the junction box 106 can be inserted between them. The base 61 is connected to the frame 2 by a fastening bolt 63. The base 61 is provided with a waist-shaped hole 611 through which the fastening bolt 63 passes. The frame 2 is provided with a slide groove 21 for the base 61 to be inserted. The slide groove 21 can allow the base 61 to slide close to or away from the positioning seat 3. By limiting the junction box 106 through the limiting member 6, the insulating housing 101 can be limited.

[0083] Reference Fig. 9In the embodiment of the present application, three probes 7 are arranged at equal intervals around the axis of the pressure head 81. In other embodiments, the number of probes 7 can also be four, five, etc. On the one hand, it ensures that the probes 7 are in full contact with the metal shell. On the other hand, if one of the probes is damaged during long-term use, the other two can still be used normally, ensuring the ability of redundant contact. The pressure head 81 is provided with a mounting hole for installing the probe 7. The upper end of the pressure head 81 is provided with an annular groove 811, which is connected to the mounting hole, and a wire outlet hole 812 is connected between the annular groove 811 and the outer wall of the pressure head 81. The annular groove 811 and the wire outlet hole 812 are used for wiring between the probe 7 and the safety measuring instrument 9.

[0084] The implementation principle of Example 1 of the present application is:

[0085] First, place the yoke coil assembly 1 on the positioning seat 3, and insert the junction box 106 into the limiter 6, then start the driving mechanism 8, make the probe 7 approach and press against the upper bracket 1021, and the safety measuring instrument 9 can detect the insulation resistance between the electrical circuit inside the yoke coil assembly 1 and the metal shell, and at the same time detect the withstand voltage performance of the electrical circuit, and then detect the current and resistance value of the yoke coil 103, then the driving mechanism 8 drives the probe 7 to reset, and then starts the motor 4 to drive the positioning seat 3 to rotate, and detects the resistance torque of the bearing 105 of the yoke coil assembly 1 through the torque meter 5, and obtains the Hall speed and the speed of the motor 4, and finally, by judging whether the test results meet the standards, it can be determined whether the quality of the yoke coil assembly 1 is qualified.

[0086] Embodiment 2:

[0087] Reference Fig.10 , Fig.11 , which is different from Example 1, is that, in order to facilitate the upward movement and disengagement of the yoke coil assembly 1 after the detection is completed, the protruding piece 112 is slidably connected with the fixing plate 111, so that the protruding piece 112 is used as a pin for automatic material removal. A lifting mechanism 12 is provided at the bottom of the induction coil 11, and the lifting mechanism 12 is used to drive the protruding piece 112 to move upward so that the bearing 105 is separated from the positioning seat 3. In order to make room for the lifting mechanism 12, the distance between the induction coil 11 and the table 22 is increased, and the connecting plate 23 is installed on the lower side of the table 22.

[0088] Reference Fig.11The fixed plate 111 is provided with a through hole 1111 for the lug 112 to slide up and down. A limit block 113 abutting against the upper side of the fixed plate 111 is fixedly connected to one side of the lug 112, and a weight block 114 is fixedly connected to the bottom of the lug 112. And the limit block 113 will not contact the yoke coil assembly 1 during the up and down sliding of the lug 112. When the lug 112 moves up to the weight block 114 abutting against the lower side of the fixed plate 111, the lug 112 cannot continue to move up; when the lug 112 moves down to the limit block 113 abutting against the upper side of the fixed plate 111, the lug 112 cannot continue to move up. The movable distance of the lug 112 is greater than the thickness of the bearing 105, so the lug 112 can push the yoke coil assembly 1 to move until the bearing 105 is separated from the positioning seat 3. The weight block 114 can lower the center of gravity of the lug 112, which is conducive to keeping the position of the lug 112 stable.

[0089] Reference Fig.13 , V-shaped notches 1121 are provided on opposite sides of the protruding piece 112, and when the stop block 113 abuts against the fixing plate 111, the notches 1121 are aligned with the inner wall of the through hole 1111, and the opening width of the notches 1121 is greater than the depth of the through hole 1111. Therefore, during the rotation of the positioning seat 3, the inner edge of the through hole 1111 of the fixing plate 111 will be stuck in the notches 1121 under the action of centrifugal force, so that the protruding piece 112 is not easy to shake up and down.

[0090] Reference Fig.11 , Fig.14 The lifting mechanism 12 includes a fixed frame 121, a lifting ring 122, a rotating ring 123, a gear ring 124, a rack 125 and a third driving member 126. The fixed frame 121 includes a ring body, a plurality of fixed rods fixedly connected to the lower side of the outer end of the ring body, and a plurality of guide rods fixedly connected to the upper side of the outer end of the ring body. The lower ends of the fixed rods are fixedly connected to the frame 2. The guide rods are arranged vertically and are all located outside the induction coil 11, so they will not affect the rotation of the positioning seat 3. The lifting ring 122 is provided with a guide hole for the guide rod to pass through, so that the lifting ring 122 is vertically slidably connected relative to the fixed frame 121. The lifting ring 122 is located at the lower side of the protruding piece 112, and the lifting ring 122 can push the protruding piece 112 to move after moving up. When the lifting ring 122 is attached to the fixed frame 121, there is a gap between the lifting ring 122 and the lower end surface of the protruding piece 112, so the lifting ring 122 will not affect the rotation of the positioning seat 3.

[0091] Reference Fig.14 The rotating ring 123 is arranged at the lower side of the lifting ring 122 and is rotatably connected to the frame 2. The gear ring 124 is fixedly connected to the outer side of the rotating ring 123. The rack 125 is meshed with the gear ring 124 and is connected to the frame.

[0092] 2 sliding connection. The third driving member 126 is used to drive the rack 125 to move so as to drive the gear ring 124 to rotate. In the embodiment of the present application, the third driving member 126 is a cylinder. Four lifting blocks 127 are fixedly connected to the lower side of the lifting ring 122 at equal intervals in the circumferential direction, and four rotating blocks 128 corresponding to the lifting blocks 127 are fixedly connected to the upper side of the rotating ring 123 at equal intervals in the circumferential direction. The lifting block 127 is provided with a first inclined surface 1271, and the rotating block 128 is provided with a second inclined surface 1281 that matches the first inclined surface 1271. After the detection is completed, the third driving member 126 is started to drive the rack 125 to move, so that the gear ring 124 rotates, and then drives the rotating block 128 to approach the lifting block 127, and the first inclined surface 1271 and the second inclined surface 1281 contact to generate a squeezing force, thereby generating an upward thrust on the lifting ring 122, so that the protruding piece 112 can be lifted until the weight-added block 114 abuts against the fixed plate 111.

[0093] Reference Fig.11 , Fig.12 , which is different from Embodiment 1, in that the structure of the limiting member 6 is different.

[0094] The limiting member 6 includes a connecting shaft 64 fixedly connected to the fixing frame 121, two sliding plates 65 slidably sleeved on the connecting shaft 64, a limiting plate 66 fixedly connected to both ends of the connecting shaft 64, and a limiting spring 67 arranged between the sliding plate 65 and the limiting plate 66. The connecting shaft 64 has a square cross-section, so that the sliding plate 65 can only slide along the connecting shaft 64 but cannot rotate. The junction box 106 is inserted between the two sliding plates 65, and the limiting spring 67 applies a force to the two sliding plates 65 to move toward each other, so that the sliding plates 65 are pressed against the junction box 106. Therefore, the limiting member 6 not only plays a role in limiting the insulating housing 101, but also prevents the junction box 106 from colliding with the limiting member 6 and causing damage.

[0095] A third inclined surface 651 is provided at the lower end of the two sliding plates 65 facing each other, a support seat 129 is fixedly connected to the upper side of the lifting ring 122, and fourth inclined surfaces 1291 cooperating with the third inclined surface 651 are provided on both sides of the upper end of the support seat 129. After the detection is completed, the lifting ring 122 moves upward to drive the support seat 129 to be stuck between the two sliding plates 65, and then separate the two sliding plates 65, thereby eliminating the resistance of the sliding plates 65 to the yoke coil assembly 1. In addition, when placing the yoke coil assembly 1, the two sliding plates 65 can be opened by hand.

[0096] In other embodiments, the limiting member 6 may also adopt the structure of embodiment 1, and the base 61 is fixedly connected to the fixing frame 121 .

[0097] The implementation principle of Example 2 of the present application is:

[0098] After the performance test of the yoke coil assembly 1 is completed, the third driving member 126 is started to drive the rotating ring 123 to rotate, and the rotating block 128 is used to squeeze the lifting block 127 to generate an upward thrust on the lifting ring 122. The lifting ring 122 lifts the protruding piece 112 until the weight block 114 abuts against the fixed plate 111. At this time, the bearing 105 is separated from the positioning seat 3, and the staff can easily take the yoke coil assembly 1 that has been tested.

[0099] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A yoke coil assembly performance test bench, characterized in that: include: Rack (2); A positioning seat (3) for placing the yoke coil assembly and plugging into the inner ring of the bearing (105) of the yoke coil assembly; A motor (4) for driving the positioning seat (3) to rotate; A torque meter (5) is mounted on the frame (2) and connected between the motor (4) and the positioning seat (3); A limiting member (6) for limiting the rotation of the insulating housing (101) of the yoke coil assembly; A probe (7) for contacting an upper bracket (1021) of the yoke coil assembly; A driving mechanism (8) mounted on the frame (2) and used to drive the probe (7) to approach an upper bracket (1021) of the yoke coil assembly; A safety measuring instrument (9) having a first input end (91) and a second input end (92), wherein the first input end (91) is electrically connected to a probe (7), and the second input end (92) is used to connect to a wire (107) of a yoke coil assembly; Also includes: A Hall element (10) is used to be installed inside a junction box (106) of a yoke coil assembly and is provided with a back magnet; The induction coil (11) is fixedly connected to the positioning seat (3); The induction coil (11) comprises a fixing plate (111) and a plurality of protruding pieces (112) arranged at intervals on the outside of the fixing plate (111); the protruding pieces (112) are used to extend between a lower bracket (1022) of the yoke coil assembly and an insulating housing (101) of the yoke coil assembly.

2. The yoke coil assembly performance testing platform according to claim 1 is characterized in that: The limiting member (6) comprises a base (61) and two limiting plates (62) connected to the upper side of the base (61); a junction box (106) of the yoke coil assembly is inserted between the two limiting plates (62); and the base (61) is connected to the frame (2) via fastening bolts (63).

3. The yoke coil assembly performance testing platform according to claim 2 is characterized in that: The base (61) is provided with a waist-shaped hole (611) through which a fastening bolt (63) passes, and the frame (2) is provided with a slide groove (21) for the base (61) to be inserted into, and the slide groove (21) can allow the base (61) to slide towards or away from the positioning seat (3).

4. The yoke coil assembly performance testing platform according to claim 1 is characterized in that: The driving mechanism (8) comprises a pressure head (81) for fixing the probe (7), a first driving member (82) for driving the pressure head (81) to move up and down, a bracket (84) for fixing the first driving member (82), and a second driving member (83) for driving the bracket (84) to slide horizontally.

5. The yoke coil assembly performance testing platform according to claim 4 is characterized in that: At least three probes (7) are arranged at intervals in the circumferential direction around the axis of the pressure head (81).

6. The yoke coil assembly performance testing platform according to claim 1 is characterized in that: The protruding piece (112) is slidably connected to the fixing plate (111); the fixing plate (111) is provided with a through hole (1111) for the protruding piece (112) to slide up and down; one side of the protruding piece (112) is connected with a limit block (113) abutting against the upper side of the fixing plate (111); a lifting mechanism (12) is provided at the bottom of the protruding piece (112); the lifting mechanism (12) is used to drive the protruding piece (112) to move upward so that the bearing (105) is separated from the positioning seat (3).

7. The yoke coil assembly performance testing platform according to claim 6, characterized in that: The lifting mechanism (12) comprises: A fixed frame (121) fixedly connected to the frame (2); A lifting ring (122) is vertically slidably connected to the fixing frame (121) and is located at the lower side of the protruding piece (112); A rotating ring (123) is arranged on the lower side of the lifting ring (122) and is rotatably connected to the frame (2); A gear ring (124) fixedly connected to the outer side of the rotating ring (123); A rack (125) meshing with the gear ring (124); A third driving member (126) is used to drive the rack (125) to move so as to drive the gear ring (124) to rotate; A plurality of lifting blocks (127) are arranged at intervals in the circumferential direction on the lower side of the lifting ring (122), and the lifting blocks (127) are provided with a first inclined surface (1271); A plurality of rotating blocks (128) corresponding to the lifting blocks (127) are arranged at intervals in the circumferential direction on the upper side of the rotating ring (123); the rotating blocks (128) are provided with a second inclined surface (1281) matched with the first inclined surface (1271).

8. The yoke coil assembly performance testing platform according to claim 7, characterized in that: The limiting member (6) comprises a connecting shaft (64) fixedly connected to a fixing frame (121), two sliding plates (65) slidably sleeved on the connecting shaft (64), a limiting plate (66) fixedly connected to both ends of the connecting shaft (64), and a limiting spring (67) arranged between the sliding plate (65) and the limiting plate (66); a terminal box (106) of a yoke coil assembly is inserted between the two sliding plates (65); and a third inclined surface (651) is arranged at the lower ends of the two sliding plates (65) facing each other. The upper side of the lifting ring (122) is connected to a support seat (129), and both sides of the upper end of the support seat (129) are provided with fourth inclined surfaces (1291) that match the third inclined surface (651).

9. The yoke coil assembly performance testing platform according to claim 6, characterized in that: A V-shaped notch (1121) is provided on the side of the protruding piece (112); when the limiting block (113) is in contact with the fixing plate (111), the notch (1121) is directly opposite to the inner wall of the through hole (1111); the opening width of the notch (1121) is greater than the depth of the through hole (1111); and a weight-increasing block (114) is fixedly connected to the lower end of the protruding piece (112).

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