A carbon brush holder spring force testing device

Abstract

This utility model relates to the field of carbon brush holder technology and discloses a carbon brush holder spring force testing device, including a worktable. A bracket and a pressure sensor are fixedly connected to the surface of the worktable. A cylinder is fixedly connected to the top of the bracket. The output end of the cylinder passes through and is slidably connected to the bottom surface of the bracket. A support plate is fixedly connected to the output end of the cylinder. A mounting groove is formed on the bottom surface of the support plate. The carbon brush holder body is arranged inside the mounting groove. The carbon brush holder body includes a metal sheet, a detection spring, and a carbon brush head. A guide assembly is provided on the bottom surface of the support plate. This carbon brush holder spring force testing device uses the insertion of the insert plate in the positioning assembly and the C-shaped groove of the metal sheet for positioning, which avoids lateral displacement of the carbon brush holder during testing. The clamping plate in the guide assembly clamps and fixes the carbon brush head, which can prevent the carbon brush head from tilting under force, thus improving the accuracy and reliability of the spring force test data.

Description

Technical Field

[0001] This utility model relates to the field of carbon brush holder technology, specifically a carbon brush holder spring force testing device. Background Technology

[0002] The function of the brush holder is to apply pressure to the carbon brushes, which slide in contact with the commutator or slip ring surface, using springs to stably conduct current between the stationary and rotating components. For motors, both the brush holder and the carbon brushes are crucial components. No matter how good the carbon brush characteristics are, if the brush holder is unsuitable, the carbon brushes will not only fail to fully utilize their excellent characteristics, but it will also significantly impact the performance and lifespan of the motor itself. The brush holder structure consists of a brush box that holds the carbon brushes in a specified position, a pressure-applying part that presses the carbon brushes with appropriate pressure to prevent vibration, a frame part that connects the brush box and the pressure-applying part, and a fixing part that secures the brush holder to the motor.

[0003] According to a published carbon brush holder spring force testing device (publication number: CN213600269U), the above application uses a motor output to drive a bidirectional lead screw transmission, thereby driving two extrusion plates to move in opposite directions or towards each other. This facilitates spring force testing of carbon brush holders of different sizes and is quite flexible in use. The baffle provides protection. By pressing down on the pressing plate, the pressure plate can be moved downwards, allowing one side of the carbon brush holder to approach the pressure sensor for spring force testing. The downward movement of the three connecting blocks allows for simultaneous spring force testing of three carbon brush holders, improving work efficiency.

[0004] However, springs are prone to bending under pressure, causing the end in contact with the pressure sensor to shift, thus affecting the results of the spring force test. Utility Model Content

[0005] The purpose of this invention is to provide a carbon brush holder spring force testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a carbon brush holder spring force testing device, comprising a workbench, a support and a pressure sensor fixedly connected to the surface of the workbench, a cylinder fixedly connected to the top of the support, the output end of the cylinder penetrating and slidably connected to the bottom surface of the support, a bearing plate fixedly connected to the output end of the cylinder, an installation groove provided on the bottom surface of the bearing plate, a carbon brush holder body disposed inside the installation groove, the carbon brush holder body comprising a metal sheet, a detection spring and a carbon brush head, a guide assembly provided on the bottom surface of the bearing plate, the guide assembly comprising two sets of side plates, both sets of side plates penetrating and slidably connected to the surface of the bearing plate, a through hole provided on the side wall of the side plate, and a threaded rod slidably connected in the through hole, a rotating wheel fixedly connected to one end of the threaded rod, a clamping plate rotatably connected to the other end of the threaded rod, and a telescopic rod fixedly connected to the clamping plate and the side plate.

[0007] Preferably, the mounting groove is provided with a positioning component, which includes an insert plate that is inserted into the C-shaped groove of the metal sheet. A second lead screw is rotatably connected to the surface of the insert plate. The second lead screw passes through and is threadedly connected to the surface of the bearing plate. A second rotating wheel is fixedly connected to the top end of the second lead screw.

[0008] Preferably, the metal sheet is C-shaped with the opening facing upwards, and the detection spring is fixedly connected between the metal sheet and the carbon brush head.

[0009] Preferably, the two sets of side plates are symmetrically arranged about the central axis of the mounting groove, and a connecting plate is fixedly connected between the top ends of the two sets of side plates.

[0010] Preferably, a guide rod is fixedly connected to the surface of the insert plate, and the guide rod is slidably connected to the surface of the support plate.

[0011] Preferably, the bottom surface of the workbench is fixedly connected to four sets of symmetrically arranged support legs.

[0012] Compared with the prior art, this utility model provides a carbon brush holder spring force testing device, which has the following beneficial effects:

[0013] 1. This carbon brush holder spring force testing device uses the insertion plate in the positioning assembly and the C-shaped groove of the metal plate for positioning, which can prevent the carbon brush holder from shifting laterally during testing; the clamping plate in the guide assembly clamps and fixes the carbon brush head, which can prevent the carbon brush head from tilting under force. Together, they ensure that the carbon brush holder is always in the preset test posture during the test, effectively reducing the test error caused by unstable workpiece fixation, and improving the accuracy and reliability of spring force test data.

[0014] 2. This carbon brush holder spring force testing device can provide a stable and controllable downward driving force through a cylinder, eliminating the need for continuous manual force application; the pressure sensor can collect and convert pressure signals in real time, directly outputting the spring force value, saving the steps of manual reading and conversion, which not only reduces the workload of the staff, but also shortens the time of a single test, making it more suitable for the spring force testing of batch carbon brush holders. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the guide component structure of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model.

[0018] In the diagram: 1. Workbench; 11. Support leg; 12. Pressure sensor; 2. Bracket; 3. Cylinder; 4. Bearing plate; 41. Mounting slot; 5. Carbon brush holder body; 51. Metal sheet; 52. Detection spring; 53. Carbon brush head; 6. Guide assembly; 61. Side plate; 62. Connecting plate; 63. Threaded rod one; 64. Rotary wheel one; 65. Clamping plate; 66. Telescopic rod; 7. Positioning assembly; 71. Insert plate; 72. Lead screw two; 73. Rotary wheel two; 74. Guide rod. Detailed Implementation

[0019] like Figures 1-3 As shown, this utility model provides a technical solution: a carbon brush holder spring force testing device, including a workbench 1, with four sets of symmetrically arranged support legs 11 fixedly connected to the bottom surface of the workbench 1. The four sets of support legs 11 are used to support the workbench 1, so that the entire device remains stable.

[0020] The surface of the workbench 1 is fixedly connected to a bracket 2 and a pressure sensor 12. A cylinder 3 is fixedly connected to the top of the bracket 2. The output end of the cylinder 3 passes through and is slidably connected to the bottom surface of the bracket 2. A support plate 4 is fixedly connected to the output end of the cylinder 3. The bracket 2, the cylinder 3 and the support plate 4 are the driving structure of the device. The support plate 4 can be driven to move up and down by extending and retracting the output end of the cylinder 3.

[0021] The bottom surface of the support plate 4 is provided with an installation groove 41. The carbon brush holder body 5 is arranged inside the installation groove 41. The carbon brush holder body 5 includes a metal sheet 51, a detection spring 52, and a carbon brush head 53. The metal sheet 51 is C-shaped and the opening is facing upward. The detection spring 52 is fixedly connected between the metal sheet 51 and the carbon brush head 53. When the cylinder 3 drives the support plate 4 to move downward, the detection spring 52 in the carbon brush holder body 5 is subjected to pressure. The pressure is transmitted to the pressure sensor 12 through the carbon brush head 53. The pressure sensor 12 can measure the magnitude of the spring force.

[0022] A guide assembly 6 is provided on the bottom surface of the support plate 4. The guide assembly 6 includes two sets of side plates 61, both of which are slidably connected to the surface of the support plate 4. The two sets of side plates 61 are symmetrically arranged about the central axis of the mounting groove 41. A connecting plate 62 is fixedly connected between the top ends of the two sets of side plates 61. The side plates 61 can move vertically on the surface of the support plate 4. The connecting plate 62 keeps the two sets of connecting plates 62 moving synchronously. A through hole is opened on the side wall of the side plate 61, and a threaded rod 63 is slidably connected in the through hole. One end of the threaded rod 63 is fixedly connected to a rotating wheel 64, and the other end of the threaded rod 63 is rotatably connected to a clamping plate 65. A telescopic rod 66 is fixedly connected to the clamping plate 65 and the side plate 61. Rotating the rotating wheel 64 can drive the threaded rod 63 to rotate, causing the clamping plate 65 to move and clamp the carbon brush head 53. The telescopic rod 66 plays an auxiliary support and guiding role, thereby preventing the carbon brush head 53 from shifting its contact position with the pressure sensor 12, which would affect the spring force test results.

[0023] The mounting slot 41 is internally equipped with a positioning component 7, which includes an insert plate 71. The insert plate 71 is inserted into the C-shaped groove of the metal sheet 51. A lead screw 72 is rotatably connected to the surface of the insert plate 71. The lead screw 72 passes through and is threadedly connected to the surface of the support plate 4. A rotating wheel 73 is fixedly connected to the top of the lead screw 72. A guide rod 74 is fixedly connected to the surface of the insert plate 71. The guide rod 74 passes through and is slidably connected to the surface of the support plate 4. The mounting slot 41 on the bottom surface of the support plate 4 is used to place the carbon brush holder body 5. During the placement of the carbon brush holder body 5, the insert plate 71 is inserted into the C-shaped groove of the metal sheet 51. By rotating the rotating wheel 73, the lead screw 72 can be rotated, thereby moving the insert plate 71 upward and positioning the metal sheet 51.

[0024] In this utility model, during use, the carbon brush holder body 5 is placed in the mounting groove 41 on the bottom surface of the support plate 4, ensuring that the C-shaped groove of the metal piece 51 is aligned with the insertion plate 71 of the positioning component 7; then, the rotating wheel 73 is rotated, driving the lead screw 72 to rotate along the threaded hole of the support plate 4. Due to the limiting effect of the guide rod 74 on the insertion plate 71, the insertion plate 71 will move vertically upward with the rotation of the lead screw 72 until the insertion plate 71 is tightly inserted into the C-shaped groove of the metal piece 51, thus completing the positioning of the metal piece 51 and preventing the carbon brush holder body 5 from shifting laterally during the test.

[0025] Next, rotate the first wheel 64 in the guide assembly 6 to drive the first threaded rod 63 to rotate along the through hole of the side plate 61. Since the clamping plate 65 is connected to the side plate 61 through the telescopic rod 66, the telescopic rod 66 restricts the rotation of the clamping plate 65, so that the clamping plate 65 moves horizontally with the rotation of the first threaded rod 63 until the two sets of clamping plates 65 tightly adhere to and clamp the carbon brush head 53 from both sides, ensuring that the carbon brush head 53 remains stable when under force and avoiding tilting or displacement.

[0026] Finally, cylinder 3 is activated, and the output end of cylinder 3 extends downward, driving the support plate 4 and the pre-positioned and clamped carbon brush holder body 5 to move downward synchronously. As the support plate 4 moves downward, the carbon brush head 53 in the carbon brush holder body 5 gradually contacts the pressure sensor 12 on the surface of the workbench 1 and generates compression. The detection spring 52 is compressed due to the reaction force of the carbon brush head 53. At this time, the pressure sensor 12 will collect the pressure signal transmitted by the carbon brush head 53 in real time and convert the signal into a specific value, that is, the elastic force of the detection spring 52. The operator can read the test data through the display terminal of the pressure sensor 12 to complete a test of the carbon brush holder spring force.

[0027] After the test, first retract the output end of the cylinder 3 upwards to reset the bearing plate 4 and the carbon brush holder body 5; then rotate the first rotating wheel 64 and the second rotating wheel 73 in the opposite direction to loosen the clamping plate 65 from the carbon brush head 53 and disengage the insert plate 71 from the C-shaped groove of the metal plate 51. Finally, remove the carbon brush holder body 5, which has been tested, from the mounting groove 41.

[0028] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A carbon brush holder spring force testing device comprising a workbench (1), characterized in that: A bracket (2) and a pressure sensor (12) are fixedly connected to the surface of the workbench (1). A cylinder (3) is fixedly connected to the top of the bracket (2). The output end of the cylinder (3) passes through and is slidably connected to the bottom surface of the bracket (2). A support plate (4) is fixedly connected to the output end of the cylinder (3). An installation groove (41) is provided on the bottom surface of the support plate (4). A carbon brush holder body (5) is provided inside the installation groove (41). The carbon brush holder body (5) includes a metal sheet (51), a detection spring (52), and a carbon brush head (53). The bottom surface of the bearing plate (4) is provided with a guide assembly (6). The guide assembly (6) includes two sets of side plates (61). Both sets of side plates (61) are slidably connected to the surface of the bearing plate (4). The side wall of the side plate (61) is provided with a through hole, and a threaded rod (63) is slidably connected in the through hole. One end of the threaded rod (63) is fixedly connected to a rotating wheel (64), and the other end of the threaded rod (63) is rotatably connected to a clamping plate (65). The clamping plate (65) and the side plate (61) are fixedly connected to a telescopic rod (66).

2. A carbon brush holder spring force testing device according to claim 1, characterized in that: The mounting slot (41) is provided with a positioning component (7). The positioning component (7) includes a insert plate (71). The insert plate (71) is inserted into the C-shaped groove of the metal sheet (51). A screw rod (72) is rotatably connected to the surface of the insert plate (71). The screw rod (72) passes through and is threadedly connected to the surface of the bearing plate (4). A rotating wheel (73) is fixedly connected to the top end of the screw rod (72).

3. A carbon brush holder spring force testing device according to claim 1, characterized in that: The metal sheet (51) is C-shaped with its opening facing upwards, and the detection spring (52) is fixedly connected between the metal sheet (51) and the carbon brush head (53).

4. A carbon brush holder spring force testing device according to claim 1, characterized in that: The two sets of side plates (61) are symmetrically arranged about the central axis of the mounting groove (41), and a connecting plate (62) is fixedly connected between the top ends of the two sets of side plates (61).

5. A carbon brush holder spring force testing device according to claim 2, characterized in that: A guide rod (74) is fixedly connected to the surface of the insert plate (71), and the guide rod (74) is slidably connected to the surface of the support plate (4).

6. A carbon brush holder spring force testing device as claimed in claim 1, characterized in that: The bottom surface of the workbench (1) is fixedly connected to four sets of symmetrically arranged support legs (11).

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