Miniature commutator withstand voltage detection device

Abstract

The utility model discloses a miniature commutator withstand voltage detection device which comprises a workbench, the upper side of the workbench is provided with a commutator fixing device and a withstand voltage detection instrument, the commutator fixing device comprises a bottom plate arranged at the front part of the workbench, and the upper side of the bottom plate is fixedly provided with a fixing seat and a mounting bracket. An insulating seat is inserted into the upper part of the fixed seat, the insulating seat is provided with an inner cavity with an opening in the upper end, and a spring piece is mounted in the inner cavity; a product core shaft is inserted into the bottom of the insulating seat, and the bottom of the product core shaft is connected with a withstand voltage detection instrument through a wire; and the insulation material pressing head is arranged over the product mandrel in an up-down lifting mode, a guide sliding shaft is vertically arranged at the upper end of the insulation material pressing head, and a disc is fixedly arranged on the upper side of the guide sliding shaft. According to the utility model, the problems of low efficiency and inaccurate detection data caused by manual testing when the existing miniature commutator is in a research and development stage or the yield is low can be solved.

Description

Technical Field

[0001] This utility model relates to the field of commutator testing technology, specifically a miniature commutator withstand voltage testing device. Background Technology

[0002] As a key component in electric motors, the withstand voltage performance of miniature commutators directly affects the motor's operational stability and safety. With the widespread application of miniature motors in various fields, such as toys, home appliances, and medical equipment, the performance requirements for miniature commutators are becoming increasingly stringent. During the production process, withstand voltage testing of miniature commutators is a crucial step in ensuring product quality. When miniature commutators are in the research and development stage or in low-volume production, manual testing is typically used. Manual testing is cumbersome, prone to instability during operation leading to commutator displacement or shaking, resulting in inaccurate test data, and is also inefficient. Therefore, it is necessary to develop a withstand voltage testing device for miniature commutators to meet current application needs. Utility Model Content

[0003] This invention provides a micro commutator withstand voltage testing device, which can solve the problems of low efficiency and inaccurate test data caused by manual testing when micro commutators are in the research and development stage or have low production volume.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a miniature commutator withstand voltage testing device, comprising a workbench, a commutator fixing device and a withstand voltage testing instrument disposed on the upper side of the workbench, the commutator fixing device comprising a base plate disposed at the front of the workbench, a fixing seat and a mounting bracket fixedly disposed on the upper side of the base plate, an insulating seat inserted into the upper part of the fixing seat, the insulating seat having an inner cavity with an upper opening, a spring plate installed in the inner cavity, the bottom of the miniature commutator contacting the spring plate; the spring plate being connected to the withstand voltage testing instrument via a wire, a product mandrel for fixing the miniature commutator being inserted into the bottom of the insulating seat, the product mandrel being vertically arranged, its upper end passing through the spring plate, and the bottom of the product mandrel being connected to the withstand voltage testing instrument via a wire. The system includes: an insulating pressure head, which is vertically adjustable and positioned directly above the product mandrel; a guide shaft vertically mounted on the upper end of the insulating pressure head, which passes through the mounting bracket; a disc fixedly mounted on the upper side of the guide shaft, which is connected to a withstand voltage testing instrument via a wire; and a probe holder located on one side of the upper end of the mounting bracket, with a probe mounted on its upper part. The probe is connected to the withstand voltage testing instrument via a wire. When the disc contacts the probe, the circuit is activated and a signal is emitted. The withstand voltage testing instrument provides electrical conductivity to the product mandrel and spring plate to test the miniature commutator. The product mandrel, spring plate, and insulating pressure head can stably fix the miniature commutator, preventing shaking during testing and improving the accuracy and efficiency of the test results.

[0005] As a supplement to the technical solution described in this utility model, a positioning hole is provided at the center of the spring sheet, and multiple first slots are provided on the outer side of the positioning hole along the circumferential direction. The first slots are elongated. When the micro commutator is subjected to a downward force, the spring sheet can deform due to the first slots. The bottom of the micro commutator is located in the positioning hole, ensuring that each commutator segment of the micro commutator can contact the spring sheet.

[0006] As a supplement to the technical solution described in this utility model, a bearing that is slidably connected to the guide slide shaft is fixedly provided at the upper front part of the mounting bracket, and the bearing improves the stability of the guide slide shaft's up and down movement.

[0007] As a supplement to the technical solution described in this utility model, the probe holder is fixed on the mounting bracket by a mounting plate, which has a simple structure and is easy to install.

[0008] As a supplement to the technical solution described in this utility model, the mounting plate is provided with a long strip-shaped second slot, and bolts pass through the second slot to fix the mounting plate to the mounting bracket, which facilitates the up and down adjustment of the mounting plate.

[0009] As a supplement to the technical solution described in this utility model, a spring is sleeved on the guide shaft between the disc and the mounting bracket. The spring is used to provide a reset force for the insulating pressing head, so that it can automatically rise and reset after the test is completed.

[0010] As a supplement to the technical solution described in this utility model, a limit screw is provided on the upper front part of the mounting bracket, and the limit screw restricts the downward pressing stroke of the insulating pressing head.

[0011] As a supplement to the technical solution described in this utility model, the bottom of the fixing base is provided with a third slot, and the wire passes through the third slot and is connected to the bottom of the product spindle.

[0012] As a supplement to the technical solution described in this utility model, the upper side of the insulating pressing head is provided with a mounting hole that matches the guide slide shaft. The guide slide shaft is installed in the mounting hole. A pin hole is provided on the side of the mounting hole, and a connecting pin passes through the pin hole to fix the guide slide shaft. A clearance hole is provided on the lower side of the mounting hole. A protrusion is provided at the upper end of the insulating pressing head. When the insulating pressing head is pressed down, the clearance hole avoids the product mandrel. During testing, the operator presses the protrusion to make the insulating pressing head press down.

[0013] As a supplement to the technical solution described in this utility model, a step is provided in the inner cavity of the insulating base, and the spring sheet is fixed to the step by bolts.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The product's spindle, spring plates, and insulating pressure head stably secure the miniature commutator, preventing shaking during testing and improving the accuracy and efficiency of the test results. The spring provides a reset force for the insulating pressure head, allowing it to automatically rise and reset after testing, eliminating the need for manual operation, reducing labor intensity, minimizing testing errors caused by human factors, and facilitating operation. This solution addresses the problems of low efficiency and inaccurate test data caused by manual testing when miniature commutators are in the R&D stage or have low production volume. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the commutator fixing device of this utility model;

[0018] Figure 3 This is a cross-sectional view of the commutator fixing device of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the fixing base of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the spring sheet of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the insulating pressing head of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the miniature commutator of this utility model placed on a spring plate.

[0023] Figure label:

[0024] 1. Workbench, 2. Base plate, 3. Fixed seat, 31. Third slot, 4. Insulating seat, 5. Spring plate, 51. Positioning hole, 52. First slot, 6. Product mandrel, 7. Insulating pressing head, 71. Mounting hole, 72. Clearance hole, 73. Protrusion, 8. Bearing, 9. Spring, 10. Disc, 11. Withstand pressure testing instrument, 12. Probe, 13. Probe seat, 14. Guide slide shaft, 15. Mounting bracket, 16. Miniature commutator, 17. Mounting plate, 171. Second slot, 18. Limit screw, 20. Commutator fixing device. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0026] The embodiments of this utility model relate to a miniature commutator withstand voltage testing device, such as... Figure 1-7 As shown, the device includes a workbench 1. A commutator fixing device 20 and a withstand voltage testing instrument 11 are mounted on the upper side of the workbench 1. The withstand voltage testing instrument 11 is an externally purchased component, model CC2670A withstand voltage tester. The commutator fixing device 20 includes a base plate 2 located at the front of the workbench 1. The base plate 2 is made of bakelite. A fixing seat 3 and a mounting bracket 15 are bolted to the upper side of the base plate 2. An insulating seat 4 is inserted into the upper part of the fixing seat 3. Head bolts are provided on the side of the fixing seat 3 to fix the fixing seat 3 and the insulating seat 4. The insulating seat 4 is made of POM or nylon and has an inner cavity with an opening at the top. A stage is installed in the inner cavity of the insulating seat 4. Step 41, on which a spring plate 5 is fixed by bolts, is connected to a withstand voltage testing instrument 11 via a wire. A product spindle 6 for fixing a miniature commutator 16 is inserted into the bottom of the insulating base 4. The product spindle 6 is vertically arranged and has a stepped shaft shape. The lower part of the product spindle 6 is inserted into the center of the lower end of the insulating base 4, and the upper end of the product spindle 6 passes through the spring plate 5. The upper end dimension of the product spindle 6 matches the dimension of the miniature commutator 16. The miniature commutator 16 is fitted onto the product spindle 6, and the bottom of the miniature commutator 16 contacts the spring plate 5. The bottom of the product spindle 6 is connected to the withstand voltage testing instrument 11 via a wire; insulation pressure... The material head 7, which can be raised and lowered, is positioned directly above the product mandrel 6. The insulating material head 7 is made of POM or nylon. A guide shaft 14 is vertically mounted on the upper end of the insulating material head 7, passing through the mounting bracket 15. A disc 10 is fixedly mounted on the upper side of the guide shaft 14, and the disc 10 is connected to the withstand voltage testing instrument 11 via a wire. A probe holder 13 is located on one side of the upper end of the mounting bracket 15. A probe 12 is mounted on the upper part of the probe holder 13. An elastic element is installed at the bottom of the probe 12 within the probe holder 13 to prevent damage to the probe 12. The probe 12 is connected to the withstand voltage testing instrument 11 via a wire. When the disc 1... When probe 12 contacts the product spindle 6, the circuit is connected and a signal is emitted. The withstand voltage testing instrument 11 conducts electricity to the product spindle 6 and spring plate 5 to test the miniature commutator 16. A spring 9 is sleeved on the guide shaft 14 between the disc 10 and the mounting bracket 15. The spring 9 is used to provide a reset force for the insulating pressure head 7, so that it can automatically rise and reset after the test is completed. The product spindle 6, spring plate 5 and insulating pressure head 7 can stably fix the miniature commutator 16, avoid shaking during the test, and improve the accuracy and efficiency of the test results. The insulating seat 4, insulating pressure head 7, mounting plate 17 and base plate 2 have insulating properties, which can prevent current leakage during the test and ensure test safety.

[0027] like Figure 5 and Figure 7 As shown, the spring sheet 5 is a sheet-like body, and a positioning hole 51 is provided at the center of the spring sheet 5. Four first slots 52 are provided on the outer side of the positioning hole 51 along the circumferential direction. The first slots 52 are elongated and divide the spring sheet 5 into multiple petal-like bodies along the positioning hole 51. The bottom of the micro commutator 16 is located inside the positioning hole 51. When the micro commutator 16 is subjected to a downward force, the multiple petal-like bodies of the spring sheet 5 can generate deformation, ensuring that each commutator segment of the micro commutator 16 can contact the spring sheet 5.

[0028] like Figure 2 As shown, a bearing 8 is fixedly provided at the upper front of the mounting bracket 15 and is slidably connected to the guide slide shaft 14. The bearing 8 improves the stability of the guide slide shaft 14 in its up and down movement.

[0029] like Figure 2 As shown, the probe holder 13 is fixed to the mounting bracket 15 by the mounting plate 17. The mounting plate 17 is made of PVC and has a long strip-shaped second slot 171. Bolts pass through the second slot 171 to fix the mounting plate 17 to the mounting bracket 15, so that the mounting plate 17 can drive the probe holder 13 and probe 12 located on the mounting plate 17 to adjust up and down.

[0030] like Figure 2 As shown, a limiting screw 18 is provided on the upper front part of the mounting bracket 15, and the limiting screw 18 restricts the downward pressing stroke of the insulating pressing head 7.

[0031] like Figure 4 As shown, the bottom of the fixed base 3 is provided with a third slot 31, and the wire of the pressure testing instrument 11 passes through the third slot 31 and is connected to the bottom of the product spindle 6.

[0032] like Figure 6 As shown, the upper side of the insulating pressing head 7 is provided with a mounting hole 71 that matches the guide slide shaft 14. The guide slide shaft 14 is installed in the mounting hole 71. The side of the mounting hole 71 is provided with a pin hole, through which a connecting pin passes to fix the guide slide shaft 14. The lower side of the mounting hole 71 is provided with a clearance hole 72. The upper end of the insulating pressing head 7 is provided with a protrusion 73. When the insulating pressing head 7 is pressed down, the clearance hole 72 avoids the product mandrel 6. During testing, the operator presses the protrusion 73 to make the insulating pressing head 7 perform a pressing operation.

[0033] In the operation of the testing device in this embodiment, the operator wears insulating gloves and places the miniature commutator 16 to be tested on the product spindle 6, ensuring that the bottom of the miniature commutator 16 is in the positioning hole 51. Initial positioning is achieved through the positioning hole 51 of the spring plate 5. The operator presses the protrusion 73 of the insulating pressure head 7, controlling its descent. The insulating pressure head 7 drives the guide shaft 14 and the disc 10 to descend together. The upper end of the product spindle 6 is inserted into the clearance hole 72. The lower surface of the insulating pressure head 7 presses against the miniature commutator 16. When the miniature commutator 16 is subjected to a downward force, the multiple lobes of the spring plate 5 can deform, ensuring that each of the miniature commutator 16... All commutator segments can contact the spring plate 5; when the disk 10 contacts the elastic probe 12, the circuit is connected, and the withstand voltage tester 11 starts to conduct electricity to the product spindle 6 and the spring plate 5 to perform withstand voltage test on the miniature commutator 16; the withstand voltage tester 11 monitors and analyzes the voltage, current and other parameters in real time during the test, and determines whether the inter-segment test of the product is qualified; after the test is completed, the insulating pressure head 7 is released, and the insulating pressure head 7 is reset under the action of the spring 9, the disk 10 is separated from the elastic probe 12, the withstand voltage tester 11 disconnects the power to the product spindle 6 and the spring plate 5, the miniature commutator 16 that has completed the test is taken out, and it is classified and processed according to the test results.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A miniature commutator withstand voltage testing device, comprising a workbench (1), wherein a commutator fixing device (20) and a withstand voltage testing instrument (11) are disposed on the upper side of the workbench (1), characterized in that: The commutator fixing device (20) includes a base plate (2) set at the front of the workbench (1). A fixing seat (3) and a mounting bracket (15) are fixedly set on the upper side of the base plate (2). An insulating seat (4) is inserted into the upper part of the fixing seat (3). The insulating seat (4) is provided with an inner cavity with an opening at the upper end. A spring plate (5) is installed in the inner cavity. The spring plate (5) is connected to a withstand voltage testing instrument (11) through a wire. A product spindle (6) for fixing a miniature commutator (16) is inserted into the bottom of the insulating seat (4). The product spindle (6) is arranged vertically, and its upper end passes through the spring plate (5). The bottom of the product spindle (6) is connected to the withstand voltage testing instrument (11) through a wire. An insulating pressing head (7) is installed above the product spindle (6) and can be raised and lowered. A guide slide (14) is vertically installed at the upper end of the insulating pressing head (7). The guide slide (14) passes through the mounting bracket (15). A disc (10) is fixedly installed on the upper side of the guide slide (14). The disc (10) is connected to the withstand voltage test instrument (11) through a wire. A probe holder (13) is provided on the upper side of the mounting bracket (15). A probe (12) is provided on the upper part of the probe holder (13). The probe (12) is connected to the withstand voltage tester (11) through a wire. When the disk (10) contacts the probe (12), the circuit is connected and a signal is emitted. The withstand voltage tester (11) conducts electricity to the product spindle (6) and spring plate (5) to test the miniature commutator (16).

2. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The spring sheet (5) has a positioning hole (51) at its center, and a plurality of first slots (52) are provided on the outer side of the positioning hole (51) along the circumferential direction.

3. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The upper front part of the mounting bracket (15) is fixedly provided with a bearing (8) that is slidably connected to the guide slide shaft (14).

4. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The probe holder (13) is fixed on the mounting bracket (15) by the mounting plate (17).

5. The miniature commutator withstand voltage testing device according to claim 4, characterized in that: The mounting plate (17) is provided with a long strip-shaped second slot (171), and bolts pass through the second slot (171) to fix the mounting plate (17) to the mounting bracket (15).

6. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: A spring (9) is fitted on the guide slide (14) between the disc (10) and the mounting bracket (15).

7. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The mounting bracket (15) is provided with a limit screw (18) on the upper front side.

8. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The bottom of the fixing base (3) is provided with a third slot (31).

9. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The upper side of the insulating pressing head (7) is provided with a mounting hole (71) that matches the guide slide shaft (14), the lower side of the mounting hole (71) is provided with a clearance hole (72), and the upper end of the insulating pressing head (7) is provided with a protrusion (73).

10. The miniature commutator withstand voltage testing device according to claim 1, characterized in that: The insulating base (4) has a step (41) in its inner cavity, and the spring sheet (5) is fixed to the step (41) by bolts.

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