Device for testing welding strength of lead of rotary transformer

Abstract

The rotary transformer lead welding strength testing device comprises a base, a lifting mechanism, a lifting head, a tension sensor, a control unit and clamping assemblies, and the clamping assemblies comprise a first clamping assembly connected to the bottom of the tension sensor and a second clamping assembly fixed to the base through a clamping base table. The second clamping assembly comprises a positioning plate and a positioning bolt, the positioning plate is a vertical plate in the left-right direction, the upper end face of the positioning plate is provided with a middle plane and inclined faces connected to the two sides of the middle plane, and the left side face of the positioning plate is provided with a circular groove for containing the stator framework and a rectangular groove for containing the connector. The rectangular groove is located right above the circular groove and penetrates through the middle plane upwards, the threaded hole communicated with the circular groove is vertically formed in the inclined plane, the positioning bolt is arranged in the threaded hole in a penetrating mode and is in threaded connection with the threaded hole, and the stator framework can be fixed in the radial direction through cooperation of the circular groove and the positioning bolt. Therefore, deformation or damage of the stator winding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of resolver testing, and particularly relates to a device for testing the welding strength of resolver leads. Background Art

[0002] A resolver (resolver / transformer) is an electromagnetic sensor, also known as a synchro resolver, which is a small AC motor used to measure the angular displacement and angular velocity of the rotating shaft of a rotating object. It consists of a stator and a rotor. The stator includes an annular stator skeleton, a stator core wrapped inside the stator skeleton, and a stator winding wound around the stator skeleton. To facilitate connection with external devices, leads are mostly welded to the connector pads of the stator skeleton, and then test data is transmitted through the leads. After welding, it is necessary to test the welding strength to ensure the stability of subsequent data transmission.

[0003] The existing welding strength test is mainly achieved by pulling. Before the test, clips are used to clamp the stator skeleton and the leads respectively, and then the two clips are separated. Since the leads extend along the radial direction of the stator skeleton along the welding part, when clamping the stator skeleton, it can only be clamped from the two end faces in the axial direction of the stator skeleton, which easily causes deformation or damage to the stator winding wound around the stator skeleton. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome one or more shortcomings in the prior art and provide a device for testing the welding strength of resolver leads.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is that a device for testing the welding strength of resolver leads includes:

[0006] A base;

[0007] A lifting mechanism, which is connected to the base and extends upward;

[0008] A lifting head, which extends in the front-rear direction and is movably connected to the front surface of the lifting mechanism in the up-and-down direction;

[0009] A tension sensor, which is connected to the bottom of the lifting head and extends downward;

[0010] A control unit, which is arranged on the base and is located on the right side of the lifting mechanism. The control unit is electrically connected to the lifting mechanism and the tension sensor;

[0011] The clamping assembly, the clamping assembly includes a first clamping assembly for clamping the lead wire and a second clamping assembly for clamping the stator skeleton. The first clamping assembly is connected to the bottom of the tensile sensor. The second clamping assembly is fixed on the base through a clamping base. The second clamping assembly is correspondingly arranged with the first clamping assembly and is located below the first clamping assembly;

[0012] The second clamping assembly includes a positioning plate and a positioning bolt. The positioning plate is a vertical plate in the left-right direction. The upper end surface of the positioning plate has a middle plane and inclined surfaces connected to both sides of the middle plane and extending downward and outward. A circular groove for accommodating the stator skeleton and a rectangular groove for accommodating the connector on the stator skeleton are provided on the left side surface of the positioning plate. The rectangular groove is located directly above the circular groove and extends along the radial direction of the circular groove. The rectangular groove penetrates the middle plane upward. A threaded hole communicating with the circular groove is vertically opened on the inclined surface. The positioning bolt is inserted into the threaded hole and is threadedly connected therewith. When the positioning bolt is tightened, the end of the positioning bolt extends into the circular groove and abuts against the stator skeleton, so that the position of the connector in the rectangular groove is kept fixed.

[0013] Preferably, the length of the rectangular groove in the up-down direction is less than that of the connector. When the positioning bolt is tightened, the upper end of the connector protrudes upward from the rectangular groove by 3 to 5 mm.

[0014] Preferably, the inclination angle of the inclined surface is 30 to 60°, and further preferably, the inclination angle of the inclined surface is 45°.

[0015] Preferably, the resolver lead wire welding strength testing device further includes a spherical joint for connecting the tensile sensor and the first clamping assembly. The axis line of the spherical joint extends in the up-down direction, so that the first clamping assembly can rotate relative to the tensile sensor along the axis line of the spherical joint.

[0016] Preferably, the first clamping assembly includes a clamping block and a clamping plate. The top of the clamping block is connected to the tensile sensor. The clamping plate is located on one side of the clamping block. The gap between the clamping plate and the clamping block is used for threading the lead wire. The clamping plate can move in a direction close to or away from the clamping block to clamp or loosen the lead wire.

[0017] Further preferably, a receiving groove for accommodating the clamping plate is provided on the side surface of the clamping block. The receiving groove penetrates the clamping block downward. The length of the receiving groove in the up-down direction is greater than the height of the clamping plate in the up-down direction. The bottom opening of the receiving groove and the bottom surface of the clamping plate are located on the same plane.

[0018] Further preferably, the first clamping assembly further includes a locking bolt. One end of the locking bolt is located outside the clamping block, and the other end sequentially penetrates through the side wall of the receiving groove and the clamping plate. The end of the locking bolt penetrating through the clamping plate is threadedly connected to the clamping plate. When the locking bolt is turned, the clamping plate can be driven to move in a direction close to or away from the clamping block.

[0019] Further preferably, a guide rod is vertically connected to the groove wall of the receiving groove. The extending direction of the guide rod is parallel to the moving direction of the clamping plate, and the end of the guide rod away from the side wall of the receiving groove is slidably inserted into a mating hole on the clamping plate.

[0020] Further preferably, there are two guide rods, and the distance between the two guide rods is greater than the width of the connector in the left-right direction.

[0021] Preferably, the lifting mechanism includes a frame-shaped support frame, a lead screw pair disposed within the frame-shaped support frame, and a bellows cover connected to the front surface of the frame-shaped support frame. The nut of the lead screw pair is fixedly connected to the lifting head.

[0022] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0023] The resolver lead wire welding strength testing device provided by the present utility model includes a base, a lifting mechanism connected to the base, a lifting head connected to the front surface of the lifting mechanism, a tensile sensor connected to the bottom of the lifting head, a control unit electrically connected to the lifting mechanism and the tensile sensor, and a clamping assembly. The clamping assembly includes a first clamping assembly connected to the bottom of the tensile sensor for clamping the lead wire and a second clamping assembly fixed to the base through a clamping base for clamping the stator skeleton. By making the second clamping assembly include a positioning plate and a positioning bolt, making the positioning plate a vertical plate in the left-right direction, making the upper end surface of the positioning plate have a middle plane and inclined surfaces connected to both sides of the middle plane, providing a circular groove for accommodating the stator skeleton and a rectangular groove for accommodating the connector on the left side surface of the positioning plate, making the rectangular groove located directly above the circular groove and extending along the radial direction of the circular groove, making the rectangular groove penetrate the middle plane upward, vertically opening a threaded hole communicating with the circular groove on the inclined surface, making the positioning bolt penetrate through the threaded hole and be threadedly connected thereto, when the positioning bolt is tightened, the end of the positioning bolt extends into the circular groove and presses against the stator skeleton, so that the position of the connector in the rectangular groove is kept fixed, and the stator skeleton can be fixed from the radial direction through the cooperation of the circular groove and the positioning bolt, thereby avoiding deformation or damage of the stator winding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the front view schematic diagram of the preferred embodiment of the present utility model.

[0025] Figure 2 is Figure 1 the left-side view schematic diagram of

[0026] Figure 3 is Figure 2 the partial enlarged schematic diagram at position A in

[0027] Figure 4 is Figure 1 the three-dimensional schematic diagram of the positioning plate in

[0028] Wherein: 1. lead wire; 2. stator skeleton; 3. connector; 10. base; 11. clamping base; 20. lifting mechanism; 21. frame support; 22. bellows; 30. lifting head; 40. tension sensor; 50. control unit; 51. support rod; 52. display screen; 53. button; 611. clamping block; 612. clamping plate; 613. receiving groove; 614. notch; 615. locking bolt; 616. guide rod; 621. positioning plate; 622. positioning bolt; 623. middle plane; 624. inclined plane; 625. circular groove; 626. rectangular groove; 627. threaded hole; 70. spherical joint. Specific embodiments

[0029] Such as Figures 1 to 4As shown in the figure, the resolver lead welding strength testing device provided by the present utility model includes: a base 10, a lifting mechanism 20, a lifting head 30, a tension sensor 40, a control unit 50, and a clamping assembly. Among them, the lifting mechanism 20 is connected to the base 10 and extends upward. The lifting mechanism 20 includes a frame-shaped support 21, a lead screw pair (not shown in the figure) provided inside the frame-shaped support 21, a bellows 22 connected to the front surface of the frame-shaped support 21, and a servo motor (not shown in the figure) for driving the rotation of the lead screw of the lead screw pair. The servo motor is preferably arranged inside the base 10. The lifting head 30 extends in the front-rear direction and is connected to the front surface of the lifting mechanism 20 in a vertically movable manner. Specifically, the rear end of the lifting head 30 penetrates through the bellows 22 and is fixedly connected to the nut of the lead screw pair. The tension sensor 40 is in an S shape and is connected to the bottom of the lifting head 30 and extends downward. The control unit 50 is supported on the base 10 by a support rod 51 and is located on the right side of the lifting mechanism 20. The control unit 50 includes a controller (not shown in the figure) electrically connected to the servo motor of the lifting mechanism and the tension sensor 40, a display screen 52 for feedback controller information, and a plurality of buttons 53 for sending instructions to the controller. The clamping assembly includes a first clamping assembly for clamping the lead 1 and a second clamping assembly for clamping the stator skeleton 2. The first clamping assembly is connected to the bottom of the tension sensor 40. The second clamping assembly is fixed to the base 10 through a clamping base 11. The second clamping assembly is arranged corresponding to the first clamping assembly (corresponding in position in the horizontal direction) and is located below the first clamping assembly. The second clamping assembly includes a positioning plate 621 and a positioning bolt 622. The positioning plate 621 is a vertical plate in the left-right direction (the plane where the positioning plate 621 is located extends in the left-right direction). The upper end surface of the positioning plate 621 has a middle plane 623 and inclined surfaces 624 connected to both sides of the middle plane 623 and extending downward and outward. The left side surface of the positioning plate 621 is provided with a circular groove 625 for accommodating the stator skeleton 2 and a rectangular groove 626 for accommodating the connector 3 on the stator skeleton 2. The rectangular groove 626 is located directly above the circular groove 625 and extends in the radial direction of the circular groove 625. The rectangular groove 626 penetrates upward through the middle plane 623. A threaded hole 627 communicating with the circular groove 625 is vertically opened on the inclined surface 624. The positioning bolt 622 is inserted into the threaded hole 627 and is threadedly connected thereto. When the positioning bolt 622 is tightened, the end of the positioning bolt 622 extends into the circular groove 625 and abuts against the stator skeleton 2, so that the position of the connector 3 in the rectangular groove 626 is kept fixed.

[0030] The advantage of such a setting is that the stator skeleton can be fixed in the radial direction through the cooperation of the circular groove and the positioning bolt, thereby avoiding the deformation or damage of the stator winding. At the same time, the clamping and disassembly operations are convenient and easy to implement.

[0031] In this embodiment, the length of the rectangular groove 626 in the vertical direction is less than the length of the connector 3 in the vertical direction. When the positioning bolt 622 is tightened, the upper end portion of the connector 3 protrudes upward from the rectangular groove 3 to 5 mm. The advantage of such a setting is that the end portion of the lead wire 1 close to the connector 3 can be exposed, facilitating the control of the length of the clamping portion when clamping the lead wire 1.

[0032] To facilitate operation and improve the pressing effect on the stator skeleton 2, the inclination angle of the inclined surface 624 is preferably 30 to 60°. In this embodiment, the inclination angle of the inclined surface 624 is 45°, and a threaded hole 627 is provided only on the inclined surface 624 in front of the middle plane 623.

[0033] In this embodiment, the resolver lead wire welding strength testing device further includes a spherical joint 70 for connecting the tension sensor 40 and the first clamping assembly. The axis line of the spherical joint 70 extends in the vertical direction, enabling the first clamping assembly to rotate relative to the tension sensor 40 along the axis line of the spherical joint 70. The advantage of such a setting is that during the test, the attitude of the first clamping assembly can be automatically adjusted to prevent the lead wire 1 clamped by it from being twisted (so that all the lead wires 1 clamped by the first clamping assembly and the connector 3 are in the same plane), improving the accuracy of the test results.

[0034] To facilitate clamping the lead wire 1, in this embodiment, the first clamping assembly includes a clamping block 611 and a clamping plate 612. The top of the clamping block 611 is connected to the tension sensor 40. The clamping plate 612 is located on one side of the clamping block 611. The gap between the clamping plate 612 and the clamping block 611 is used for passing the lead wire 1 through. The clamping plate 612 can move in a direction close to or away from the clamping block 611 to clamp or loosen the lead wire 1.

[0035] Furthermore, a receiving groove 613 for accommodating the clamping plate 612 is provided on the side surface of the clamping block 611. The receiving groove 613 penetrates the clamping block 611 downward. The length of the receiving groove 613 in the vertical direction is greater than the height of the clamping plate 612 in the vertical direction. The bottom opening of the receiving groove 613 and the bottom surface of the clamping plate 612 are in the same plane. The advantage of such a setting is that a notch 614 can be formed between the upper end portion of the clamping plate 612 and the top wall of the receiving groove 613. When clamping the lead wire 1, the excessive part of the lead wire 1 can be led out from the notch 614 to facilitate adjusting the clamping position of the lead wire 1.

[0036] For the convenience of clamping the lead 1, further, the first clamping assembly further includes a locking bolt 615. One end of the locking bolt 615 is located outside the clamping block 611, and the other end sequentially penetrates through the side wall of the receiving groove 613 and the clamping plate 612. The end of the locking bolt 615 penetrating through the clamping plate 612 is threadedly connected to the clamping plate 612. When the locking bolt 615 is turned, the clamping plate 612 can be driven to move in a direction close to or away from the clamping block 611.

[0037] To prevent the clamping plate 612 from shaking in the receiving groove 613 and affecting the clamping effect, further, a guide rod 616 is vertically connected to the groove wall of the receiving groove 613. The extending direction of the guide rod 616 is parallel to the moving direction of the clamping plate 612. The end of the guide rod 616 away from the side wall of the receiving groove 613 is slidably inserted into the fitting hole on the clamping plate 612.

[0038] To improve the guiding effect, further, there are two guide rods 616, and the distance between the two guide rods 616 is greater than the width of the connector 3 in the left-right direction, so as to adapt to clamping all the leads 1 at the same time.

[0039] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A rotary transformer lead welding strength testing device, comprising: Base; A lifting mechanism, the lifting mechanism is connected to the base and extends upward; A lifting head, the lifting head extending in the front-to-back direction, the lifting head being connected to the front surface of the lifting mechanism so as to be movable up and down; A tension sensor, the tension sensor is connected to the bottom of the lifting head and extends downward; A control unit, the control unit is arranged on the base and located on the right side of the lifting mechanism, and the control unit is electrically connected to the lifting mechanism and the tension sensor; A clamping assembly, the clamping assembly comprising a first clamping assembly for clamping a lead wire and a second clamping assembly for clamping a stator frame, the first clamping assembly being connected to the bottom of the tension sensor, the second clamping assembly being fixed to the base through a clamping base, the second clamping assembly being arranged corresponding to the first clamping assembly and being located below the first clamping assembly; Features: The second clamping assembly includes a positioning plate and a positioning bolt. The positioning plate is a vertical plate in the left and right directions. The upper end surface of the positioning plate has a middle plane and an inclined surface connected to both sides of the middle plane and extending downward and outward. The left side surface of the positioning plate is provided with a circular groove for accommodating the stator frame and a rectangular groove for accommodating a connector on the stator frame. The rectangular groove is located directly above the circular groove and extends in the radial direction of the circular groove. The rectangular groove penetrates the middle plane upward. A threaded hole that intersects the circular groove is vertically opened on the inclined surface. The positioning bolt is penetrated in the threaded hole and threadedly connected thereto. When the positioning bolt is tightened, the end of the positioning bolt extends into the circular groove and presses against the stator frame to keep the position of the connector in the rectangular groove fixed.

2. The rotary transformer lead welding strength testing device according to claim 1, characterized in that: The length of the rectangular groove in the up-down direction is smaller than that of the connector, and when the positioning bolt is tightened, the upper end of the connector protrudes upward from the rectangular groove by 3 to 5 mm.

3. The rotary transformer lead welding strength testing device according to claim 1, characterized in that: The inclination angle of the inclined surface is 30 to 60 degrees.

4. The rotary transformer lead welding strength testing device according to claim 1, characterized in that: The rotary transformer lead welding strength testing device also includes a spherical joint for connecting the tension sensor and the first clamping assembly, and the axis of the spherical joint extends in the up and down directions, so that the first clamping assembly can rotate along the axis of the spherical joint relative to the tension sensor.

5. The rotary transformer lead welding strength testing device according to claim 1, characterized in that: The first clamping assembly includes a clamping block and a clamping plate, the top of the clamping block is connected to the tension sensor, the clamping plate is located on one side of the clamping block, the gap between the clamping plate and the clamping block is used to pass the lead, and the clamping plate can move toward or away from the clamping block to clamp or loosen the lead.

6. The rotary transformer lead welding strength testing device according to claim 5, characterized in that: The side of the clamping block is provided with a receiving groove for receiving the clamping plate, the receiving groove passes downward through the clamping block, the length of the receiving groove in the up and down direction is greater than the height of the clamping plate in the up and down direction, and the bottom opening of the receiving groove is located in the same plane as the bottom surface of the clamping plate.

7. The rotary transformer lead welding strength testing device according to claim 6, characterized in that: The first clamping assembly also includes a locking bolt, one end of which is located on the outside of the clamping block, and the other end passes through the side wall of the accommodating groove and the clamping plate in sequence. The end of the locking bolt passes through the clamping plate and is threadedly connected to the clamping plate. When the locking bolt is turned, the clamping plate can be driven to move toward or away from the clamping block.

8. The rotary transformer lead welding strength testing device according to claim 6, characterized in that: A guide rod is vertically connected to the groove wall of the accommodating groove, and the extension direction of the guide rod is parallel to the moving direction of the clamping plate. The end of the guide rod away from the side wall of the accommodating groove is slidably inserted into the matching hole on the clamping plate.

9. The rotary transformer lead welding strength testing device according to claim 8, characterized in that: There are two guide rods, and the distance between the two guide rods is greater than the width of the connector in the left-right direction.

10. The rotary transformer lead welding strength testing device according to claim 1, characterized in that: The lifting mechanism comprises a frame-type support frame, a screw rod pair arranged in the frame-type support frame, and an accordion cover connected to the front surface of the frame-type support frame. The nut of the screw rod pair is fixedly connected to the lifting head.

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