A commutator detection mechanism

Abstract

The application relates to the technical field of commutator detection devices, in particular to a commutator detection mechanism which comprises a hook abutting column and a carbon sheet abutting column, the hook abutting column comprises an abutting part for abutting with a hook of a commutator, the carbon sheet abutting column comprises an abutting part for abutting with a carbon sheet of the commutator, and the size of the abutting part is greater than that of the abutting part. The application can increase the contact areas of the abutting part and the abutting part with the hook and the carbon sheet as much as possible, effectively avoid pressing out the pressure marks on the carbon sheet, better protect the structural integrity of the commutator in the detection process, and improve the safety and reliability of the detection process.

Description

Technical Field

[0001] This application relates to the field of commutator testing devices, and more particularly to a commutator testing mechanism. Background Technology

[0002] The commutator is a crucial component of the armature of DC motors and AC commutator motors. Its core function is to automatically change the direction of current in the rotor windings as the motor rotates. Commutators are primarily used in brushed DC motors and are applied in fields such as toy motors and power tools.

[0003] Before leaving the factory, commutators need to undergo resistance testing. Existing testing methods often rely on manual methods, which are inefficient. Automated testing methods, on the other hand, suffer from problems such as inaccurate positioning and damage to the commutator. Utility Model Content

[0004] In order to reduce damage to the commutator, this application provides a commutator testing mechanism.

[0005] This application provides a commutator testing mechanism, which adopts the following technical solution: A commutator detection mechanism includes a hook contact post and a carbon sheet contact post. The hook contact post includes a contact portion for contacting the hook of the commutator. The end faces of the contact portion and the pressing portion are both arc surfaces. The size of the contact portion is larger than the size of the pressing portion.

[0006] By adopting the above technical solution, during commutator testing, the hook contact post achieves electrical connection with the commutator's hook, and the carbon sheet contact post achieves electrical connection with the commutator's carbon sheet, thereby achieving circuit continuity and enabling resistance testing. The hook contact post has a larger contact area, resulting in a larger contact area between the contact area and the hook, while the carbon sheet contact post has a smaller pressing area, effectively preventing indentations on the carbon sheet. This better protects the commutator's structural integrity during testing, improving the safety and reliability of the testing process.

[0007] Optionally, both the hook-shaped contact post and the carbon sheet contact post are provided in two sets.

[0008] By adopting the above technical solution, two sets of bent hook contact posts and carbon sheet contact posts are set up, and a four-wire detection resistor is used. Through independent measurement of current and voltage lines, the influence of wire resistance and contact resistance on the measurement results is eliminated, the error introduced by wire resistance is reduced, and the accuracy and consistency of the detection results are improved.

[0009] Optionally, the two sets of hook-shaped contact posts are arranged along the axial direction of the commutator, and the two sets of hook-shaped contact posts are located on both sides of the hook in the axial direction of the commutator.

[0010] If the two sets of hook contact posts are arranged radially along the commutator using the above technical solution, there may be insufficient contact space. In such cases, the size of the hook contact posts needs to be set smaller to prevent the two sets of hook contact posts from contacting each other and affecting the detection. The design of this application can maximize the size of the contact part of the hook contact posts, ensuring a sufficiently large contact surface and guaranteeing detection accuracy. Furthermore, arranging the two sets of hook contact posts axially along the commutator and located on both sides of the hook can achieve bidirectional limiting and uniform force application on the hook, preventing axial movement of the commutator during the detection process, and further improving positioning accuracy and detection stability.

[0011] Optionally, the two sets of carbon sheet contact posts are arranged radially along the commutator.

[0012] If the two sets of carbon sheet contact posts are arranged around the central axis of the commutator using the above technical solution, there may be insufficient contact space. In this case, the size of the carbon sheet contact posts needs to be set smaller to prevent the two sets of hook contact posts from contacting each other and affecting the detection. The design of this application can maximize the size of the pressing part of the carbon sheet contact posts, ensuring a sufficiently large contact surface and ensuring detection accuracy.

[0013] Optionally, it also includes a positioning seat for placing the commutator, the positioning seat having multiple positioning blocks for insertion between two adjacent hooks.

[0014] By adopting the above technical solution, a positioning seat with multiple positioning blocks is set up, and the positioning blocks are inserted between two adjacent hooks, so as to achieve precise positioning and fixation of the commutator, prevent it from rotating or shifting during the testing process, and thus ensure the accuracy of the testing process.

[0015] Optionally, two positioning blocks are provided, and the two positioning blocks are arranged radially along the commutator.

[0016] By adopting the above technical solution, the two positioning blocks are arranged radially along the commutator, enabling clamping and positioning of the commutator from two radial directions, further enhancing the stability of the commutator. This is particularly suitable for commutator types with multiple hooks, improving the versatility and adaptability of the mechanism. Only two positioning blocks are needed to achieve complete commutator positioning on the horizontal plane, minimizing the number of positioning blocks while ensuring effective positioning and simplifying the structure.

[0017] Optionally, the surface of the positioning block near the commutator is a limiting surface, the limiting surface is an arc surface, and an inclined guide surface is formed on the limiting surface. The distance between the guide surface and the central axis of the commutator increases along the direction in which the positioning block is inserted between two adjacent hooks.

[0018] By adopting the above technical solution, the limiting surface of the positioning block is an arc surface, which can adapt to the circumferential sidewall of the commutator. The limiting surface of the positioning block has an inclined guide surface, so even if the positioning block deviates slightly when it is placed in the positioning seat, it can enter the correct position under the guidance of the guide surface, ensuring that the commutator is accurately positioned before testing and improving the testing accuracy.

[0019] Optionally, the positioning block has inclined guide slopes formed on both surfaces near the two adjacent hooks, and the distance between the two guide slopes decreases along the direction in which the positioning block is inserted between the two adjacent hooks.

[0020] By adopting the above technical solution, guide ramps are set on both sides of the positioning block. Even if the commutator deviates slightly when it is placed into the positioning seat, it can enter the correct position under the guidance of the guide ramps, ensuring that the positioning block can be smoothly inserted between two adjacent hooks, thereby positioning the commutator.

[0021] Optionally, the positioning seat is further provided with a positioning post, which is used to insert into the through hole of the commutator.

[0022] By adopting the above technical solution, and by adding a positioning post and inserting it into the through hole of the commutator, the commutator is positioned radially, which significantly improves the positioning accuracy of the commutator and the positional consistency during testing, thereby improving the accuracy of testing.

[0023] Optionally, it also includes a detection drive source, a detection seat, an adjustment drive source, and a positioning seat for placing the commutator. Two sets of carbon sheet contact posts and one set of hook contact posts are disposed on the detection seat, and the other set of hook contact posts are disposed on the positioning seat. The detection drive source is used to drive the detection seat to move in a direction closer to or farther from the positioning seat, and the adjustment drive source is used to drive the positioning seat to move in a direction closer to or farther from the detection seat.

[0024] By adopting the above technical solution and controlling the movement of the detection seat by setting a detection drive source, the controllability of the automatic detection process of the commutator is achieved. This improves detection efficiency while reducing human intervention and potential damage to the commutator, making it suitable for applications in automated production lines. Furthermore, adjusting the drive source can move the positioning seat, allowing adjustment of the distance between the positioning seat and the detection seat to accommodate commutators of different heights, thus improving the applicability of the mechanism.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Maximize the contact area between the contacting and pressing parts and the hooks and carbon sheets, while effectively avoiding indentations on the carbon sheets. This better protects the structural integrity of the commutator during testing and improves the safety and reliability of the testing process. 2. It achieves precise positioning and fixation of the commutator, preventing it from rotating or shifting during the testing process, thereby ensuring the accuracy of the testing process; 3. Adjusting the drive source can drive the positioning seat to move, and the distance between the positioning seat and the detection seat can be adjusted to adapt to commutators of different heights, thus improving the applicability of the mechanism. Attached Figure Description

[0026] Figure 1 This is a structural diagram of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Figure 3 This is a schematic diagram of the positioning seat in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Hook-shaped contact post; 11. Contact part; 2. Carbon sheet contact post; 21. Pressing part; 3. Positioning seat; 31. Positioning block; 311. Limiting surface; 312. Guide surface; 313. Guide slope; 32. Positioning post; 321. Guide arc surface; 4. Detection drive source; 5. Detection seat; 6. Adjustment drive source; 7. Buffer elastic element. Detailed Implementation

[0030] The following combination Figures 1-3 This application will be described in further detail.

[0031] This application discloses a commutator detection mechanism. (Refer to...) Figure 1 and Figure 2 The commutator detection mechanism includes a hook contact post 1 and a carbon sheet contact post 2. The hook contact post 1 includes a contact portion 11 for contacting the hook of the commutator, and the carbon sheet contact post 2 includes a pressing portion 21 for contacting the carbon sheet of the commutator. The size of the contact portion 11 is larger than the size of the pressing portion 21.

[0032] Reference Figure 1 The commutator detection mechanism also includes a detection drive source 4 and a detection base 5. The detection drive source 4 is a cylinder, and the telescopic rod of the detection drive source 4 is fixedly connected to the detection base 5, thereby driving the detection base 5 to move. In other embodiments, the detection drive source 4 can be a hydraulic cylinder, an electric push rod, or a motor, etc., as long as it can drive the detection base 5 to move.

[0033] Reference Figure 1 and Figure 2The commutator testing mechanism also includes a positioning seat 3, located directly below the testing seat 5. A testing drive source 4 drives the testing seat 5 to move towards or away from the positioning seat 3. The commutator testing mechanism also includes an adjustment drive source 6, which is a cylinder. The telescopic rod of the adjustment drive source 6 is fixedly connected to the positioning seat 3, thereby enabling the positioning seat 3 to move towards or away from the testing seat 5, adjusting its height. During testing, the positioning seat 3 remains stationary. In other embodiments, the adjustment drive source 6 can be a hydraulic cylinder, an electric push rod, or a motor, etc.—any method capable of driving the positioning seat 3 to move is acceptable.

[0034] Reference Figure 2 Both the hook contact post 1 and the carbon sheet contact post 2 are provided in two sets. The multiple hook contact posts 1 in each set correspond one-to-one with each hook of the commutator, and the multiple carbon sheet contact posts 2 in each set correspond one-to-one with each carbon sheet of the commutator.

[0035] Reference Figure 2 and Figure 3 One set of hook-shaped contact posts 1 is fixedly installed on the detection seat 5, while the other set of hook-shaped contact posts 1 is slidably installed on the positioning seat 3 along the arrangement direction of the detection seat 5 and the positioning seat 3. The end face of the contact portion 11 of the hook-shaped contact post 1 on the detection seat 5 is an arc surface, while the contact portion 11 of the hook-shaped contact post 1 on the positioning seat 3 is a cylinder. A buffer elastic element 7 is connected between the hook-shaped contact post 1 on the positioning seat 3 and the positioning seat 3, allowing the positioning seat 3 to move in a direction closer to the detection seat 5. The buffer elastic element 7 is sleeved on the hook-shaped contact post 1. The two sets of hook-shaped contact posts 1 are arranged along the axial direction of the commutator. During testing, the two sets of hook-shaped contact posts 1 are located on both sides of the hook along the axial direction of the commutator.

[0036] Reference Figure 2 Both sets of carbon sheet contact posts 2 are fixedly installed on the detection base 5, and the two sets of carbon sheet contact posts 2 are arranged radially along the commutator. The end face of the pressing part 21 of the carbon sheet contact post 2 is an arc surface.

[0037] Reference Figure 2 and Figure 3 The positioning base 3 has multiple positioning blocks 31 integrally formed on it. Each positioning block 31 is arranged around the central axis of the commutator and is used to insert between two adjacent hooks. In this embodiment, there are two positioning blocks 31, which are arranged radially along the commutator and are located on the outer side of the circumferential sidewall of the commutator.

[0038] Reference Figure 3The surface of the positioning block 31 near the commutator is a limiting surface 311. The limiting surface 311 is an arc surface. An inclined guide surface 312 is formed on the limiting surface 311. The distance between the guide surface 312 and the central axis of the commutator increases along the direction between the two adjacent hooks of the positioning block 31.

[0039] Reference Figure 3 The positioning block 31 has inclined guide slopes 313 on both surfaces near the two adjacent hooks. The distance between the two guide slopes 313 decreases along the direction in which the positioning block 31 is inserted between the two adjacent hooks.

[0040] Reference Figure 3 The positioning base 3 also has an integrally formed positioning post 32, which is a cylinder and is used to insert into the through hole of the commutator. A guide arc surface 321 is formed on the circumferential side wall of the end of the positioning post 32 near the detection base 5. The guide arc surface 321 is bent in a direction away from the central axis of the positioning post 32.

[0041] The implementation principle of a commutator testing mechanism according to an embodiment of this application is as follows: Before testing, the commutator is placed on the positioning seat 3, so that the positioning pin 32 is inserted into the through hole of the commutator, the positioning block 31 is located between two adjacent hooks, and the hooks of the commutator are located on the hook abutment pin 1 on the positioning seat 3 and abut against the hook abutment pin 1. The drive source 6 is adjusted to drive the positioning seat 3 to move to a suitable height to accommodate the commutator at a certain height. During testing, the testing drive source 4 drives the testing seat 5 to descend, the hook abutment pin 1 on the testing seat 5 abuts against the hook, and the two sets of carbon sheet abutment pins 2 abut against the carbon sheet. The commutator overcomes the elastic force of the buffer elastic element 7 and descends slightly to buffer the pressure of the testing seat 5 and ensure that the commutator maintains stable contact with the hook abutment pin 1 and the carbon sheet abutment pin 2 on the testing seat 5. One set of hook abutment pins 1 is connected to one set of carbon sheet abutment pins 2, and the other set of hook abutment pins 1 is connected to the other set of carbon sheet abutment pins 2.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A commutator detection mechanism, characterized in that: It includes a hook abutment post (1) and a carbon sheet abutment post (2). The hook abutment post (1) includes an abutment part (11) for abutting against the hook of the commutator, and the carbon sheet abutment post (2) includes a pressing part (21) for abutting against the carbon sheet of the commutator. The size of the abutment part (11) is larger than the size of the pressing part (21).

2. The commutator detection mechanism according to claim 1, characterized in that: Both the hook-shaped contact post (1) and the carbon sheet contact post (2) are provided in two sets.

3. The commutator detection mechanism according to claim 2, characterized in that: The two sets of hook abutment posts (1) are arranged along the axial direction of the commutator, and the two sets of hook abutment posts (1) are located on both sides of the hook in the axial direction of the commutator.

4. The commutator detection mechanism according to claim 2, characterized in that: The two sets of carbon sheet contact posts (2) are arranged radially along the commutator.

5. A commutator detection mechanism according to claim 1, characterized in that: It also includes a positioning seat (3) for placing the commutator, the positioning seat (3) having a plurality of positioning blocks (31) for inserting between two adjacent hooks.

6. A commutator detection mechanism according to claim 5, characterized in that: Two positioning blocks (31) are provided, and the two positioning blocks (31) are arranged radially along the commutator.

7. A commutator detection mechanism according to claim 5, characterized in that: The positioning block (31) is used to limit the surface of the commutator. The limiting surface (311) is an arc surface. An inclined guide surface (312) is formed on the limiting surface (311). The distance between the guide surface (312) and the central axis of the commutator increases along the direction between the two adjacent hooks when the positioning block (31) is inserted.

8. A commutator detection mechanism according to claim 5, characterized in that: The positioning block (31) has inclined guide slopes (313) formed on both surfaces near the two adjacent hooks. The distance between the two guide slopes (313) decreases along the direction in which the positioning block (31) is inserted between the two adjacent hooks.

9. A commutator detection mechanism according to claim 5, characterized in that: The positioning seat (3) is also provided with a positioning post (32), which is used to insert the through hole of the commutator.

10. A commutator detection mechanism according to claim 2, characterized in that: It also includes a detection drive source (4), a detection seat (5), an adjustment drive source (6), and a positioning seat (3) for placing the commutator. Two sets of carbon sheet contact posts (2) and one set of hook contact posts (1) are provided on the detection seat (5), and the other set of hook contact posts (1) is provided on the positioning seat (3). The detection drive source (4) is used to drive the detection seat (5) to move in a direction closer to or away from the positioning seat (3), and the adjustment drive source (6) is used to drive the positioning seat (3) to move in a direction closer to or away from the detection seat (5).

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