An eccentric positioning tool clamp for a movable contact

Abstract

This utility model relates to the field of machining technology, and in particular to a moving contact eccentric positioning fixture, which alleviates the problem that traditional three-jaw chucks and other general-purpose fixtures are difficult to use to achieve accurate positioning, reliable clamping, and convenient disassembly and assembly of workpieces, thus affecting machining quality and efficiency. The fixture includes a main body, a locking ring, and a stripper ring; the main body is cylindrical with a cavity extending through both ends, and the cavity is offset to one side; the moving contact can be assembled into the cavity; the eccentric dimension of the cavity matches the eccentric dimension of the moving contact; the locking ring can lock the moving contact; the stripper ring can drive the moving contact to move away from the main body; after the moving contact is inserted into the main body, it is locked by the locking ring to facilitate the machining of the eccentric hole; after machining, pulling the stripper ring pushes the moving contact out of the main body, facilitating disassembly and assembly and avoiding the risk of personal injury from directly pulling out the moving contact.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to an eccentric positioning fixture for a moving contact. Background Technology

[0002] Moving contacts are one of the key components in electrical switchgear, widely used in power equipment such as circuit breakers, disconnectors, and load switches. Their main function is to connect and disconnect current during circuit operation. By contacting or separating from the stationary contact, the moving contact can effectively control the conduction state of the circuit, ensuring the safe and stable operation of the power system.

[0003] In the manufacturing process of moving contacts, deep holes are typically machined in the axial direction to meet assembly and usage requirements. However, the design position of these deep holes often deviates from the geometric axis of the workpiece, forming an eccentric structure. This special structure makes it difficult for traditional general-purpose clamping fixtures such as three-jaw chucks to achieve accurate positioning and reliable clamping of the workpiece. If conventional clamping methods are used, problems such as workpiece offset and unstable clamping can easily occur, thereby affecting machining accuracy and even causing parts to be scrapped.

[0004] Therefore, for moving contacts with eccentric deep hole structures, specialized fixtures must be used during machining to ensure machining quality and production efficiency. Currently, there is a lack of a specialized fixture with a reasonable structure, accurate positioning, stable clamping, and convenient assembly / disassembly to meet the high-precision machining requirements of such moving contacts. Utility Model Content

[0005] To alleviate the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] This utility model provides a moving contact eccentric positioning fixture, including a main body, a locking ring and a unloading ring;

[0007] The main body is cylindrical, with a cavity that extends through both ends, and the cavity is offset to one side.

[0008] The moving contact can be assembled into the cavity;

[0009] The eccentric dimension of the cavity matches the eccentric dimension of the moving contact;

[0010] The locking ring can lock the moving contact;

[0011] The unloading ring can drive the moving contact to move away from the main body.

[0012] Furthermore,

[0013] The cavity is provided with protrusions;

[0014] The protrusion engages with the recess of the moving contact.

[0015] Furthermore,

[0016] The locking ring is inserted into the feed end of the main body.

[0017] Furthermore,

[0018] The feed end of the main body is provided with three long grooves arranged in a ring array along the axis of the main body;

[0019] The long groove connects the inside and outside of the main body.

[0020] Furthermore,

[0021] The outer wall of the feed end of the main body is provided with a boss;

[0022] The outer wall of the boss slopes outward from the feed end toward the side opposite to the feed end.

[0023] Furthermore,

[0024] The locking ring is threadedly connected to the outer wall of the boss.

[0025] Furthermore,

[0026] The main body has a long groove that runs through both the inside and outside on the side opposite to the feed end.

[0027] Furthermore,

[0028] The three long grooves are arranged in a circular array along the axis of the body.

[0029] Furthermore,

[0030] The unloading ring includes a collar, a pusher ring, and a connecting block;

[0031] The sleeve is inserted into the main body and has a certain gap between it and the inner wall of the main body;

[0032] The pusher ring is sleeved with the main body and has a certain gap between it and the outer wall of the main body;

[0033] The collar and the pusher ring are fixedly connected by a connecting block;

[0034] The connecting block is slidably connected to the long groove.

[0035] The beneficial effects of this utility model's eccentric positioning fixture for the moving contact are analyzed as follows:

[0036] This fixture includes a main body, a locking ring, and a discharge ring; the main body is cylindrical with a cavity that extends through both ends, and the cavity is offset to one side; a moving contact can be fitted into the cavity; the eccentricity of the cavity matches the eccentricity of the moving contact; the locking ring can lock the moving contact; the discharge ring can drive the moving contact to move away from the main body.

[0037] After the moving contact is inserted into the main body, it is locked by a locking ring to facilitate the machining of the eccentric hole. After machining is completed, the moving contact can be pushed out of the main body by pulling the unloading ring, which is convenient for disassembly and assembly and avoids the problem of personal injury caused by directly pulling out the moving contact. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 A schematic diagram of the structure of the eccentric positioning fixture for the moving contact provided in this embodiment of the utility model;

[0040] Figure 2 A cross-sectional schematic diagram of the eccentric positioning fixture for the moving contact provided in this embodiment of the utility model;

[0041] Figure 3 A structural diagram of the main body;

[0042] Figure 4 This is a schematic diagram of the moving contact.

[0043] Figure 5 This is a schematic diagram of the unloading ring.

[0044] icon:

[0045] 100 - Main body; 110 - Protrusion; 120 - Long groove; 130 - Boss; 140 - Long groove;

[0046] 200-Locking ring;

[0047] 300 - Unloading ring; 310 - Collar ring; 320 - Pushing ring; 330 - Connecting block;

[0048] 400 - Moving contact; 410 - Recessed. Detailed Implementation

[0049] In the manufacturing process of moving contacts, deep holes are usually required to be machined in the axial direction to meet assembly and use requirements. Using traditional three-jaw chucks and other general-purpose fixtures makes it difficult to achieve accurate positioning, reliable clamping and convenient assembly and disassembly of the workpiece, which affects the processing quality and efficiency.

[0050] In view of this, such as Figures 1 to 5 As shown, this solution provides an eccentric positioning fixture for the moving contact to alleviate the above problems;

[0051] This device includes a main body 100, a locking ring 200, and a discharge ring 300;

[0052] The main body 100 is cylindrical, with a cavity that extends through both ends, and the cavity is offset to one side.

[0053] The moving contact 400 can be assembled into the cavity;

[0054] The eccentric dimension of the cavity matches the eccentric dimension of the moving contact 400;

[0055] The locking ring 200 can lock the moving contact 400;

[0056] The unloading ring 300 can drive the moving contact 400 to move away from the main body 100;

[0057] A protrusion 110 is provided inside the cavity;

[0058] The protrusion 110 engages with the recess 410 of the moving contact 400.

[0059] Specifically, such as Figure 3 and Figure 4 As shown, the cavity of the main body 100 is offset to one side, making the annular inner wall of the main body 100 thin on one side and thick on the other. The protrusion 110 is located at the thinnest position of the annular inner wall of the main body 100 and extends from one end to the other end.

[0060] The moving contact 400 has a recess 410 that runs through both ends as required by the design. The size of the protrusion 110 matches the recess 410, so that after the moving contact 400 is assembled into the body 100, a sliding fit is formed between the recess 410 and the protrusion 110. The deep hole machined by the moving contact 400 is offset away from the recess 410, so that the deep hole after assembly is located at the center of the body 100, which facilitates machining.

[0061] like Figure 1 and Figure 2 As shown, the locking ring 200 is inserted into the feed end of the main body 100;

[0062] The feed end of the main body 100 is provided with three long grooves 120 arranged in a ring array along the axis of the main body 100;

[0063] The elongated groove 120 connects the inside and outside of the main body 100;

[0064] The outer wall of the feed end of the main body 100 is provided with a boss 130;

[0065] The outer wall of the boss 130 slopes outward from the feed end toward the side away from the feed end;

[0066] The locking ring 200 is threadedly connected to the outer wall of the boss 130.

[0067] Specifically, when the locking ring 200 is located at the feed end of the main body 100, it does not affect the sliding of the moving contact 400 within the main body 100. After the moving contact 400 is assembled into the main body 100, by rotating the locking ring 200, it moves away from the feed end of the main body 100 through the thread. Since the outer wall of the boss 130 is inclined, the feed end of the main body 100 is squeezed inward and shifted, eventually engaging with the moving contact 400, thus locking the moving contact 400 and facilitating the processing of the eccentric deep hole.

[0068] like Figure 1 , Figure 2 and Figure 5 As shown, the main body 100 has an inner and outer through groove 140 on the side opposite to the feed end;

[0069] The three elongated grooves 140 are arranged in a ring array along the axis of the main body 100;

[0070] The unloading ring 300 includes a collar 310, a pusher ring 320, and a connecting block 330;

[0071] The sleeve is inserted into the main body 100 and has a certain gap between it and the inner wall of the main body 100;

[0072] The pusher ring 320 is sleeved with the main body 100 and has a certain gap with the outer wall of the main body 100;

[0073] The collar 310 and the pusher ring 320 are fixedly connected by a connecting block 330;

[0074] The connecting block 330 is slidably connected to the long groove 140.

[0075] Specifically, since this device can be clamped by a three-jaw chuck after positioning the eccentric hole of the moving contact 400, and this clamping method is simple and convenient, three connecting blocks 330 arranged in a ring array and a matching long groove 140 are set to avoid the clamping of the three-jaw chuck. After the main body 100 is clamped by the three-jaw chuck, it does not need to be removed. Only the moving contact 400 to be processed needs to be replaced to complete the batch processing. Because the moving contact 400 needs to be locked during processing, there is still a large static friction between the moving contact 400 and the main body 100 after processing is completed and unlocked, and the workpiece surface may have grease to make it relatively smooth. The material is slippery, but the edges have burrs, making it difficult for workers to grip. Forcibly removing it may cause scratches. Therefore, a material unloading ring 300 is provided. When the moving contact 400 is inserted into the main body 100, the moving contact 400 pushes the pusher ring 320 to move away from the material inlet end of the main body 100. After the moving contact 400 is assembled in place, the connecting block 330 moves along the long groove 140 to the initial position. When it is necessary to remove the moving contact 400, pull the collar 310 to move it towards the material inlet end of the main body 100, and the moving contact 400 can be pushed out. To facilitate the use of workers, anti-slip pads can also be provided on the surfaces of the locking ring 200 and the collar 310.

[0076] This solution has at least the following beneficial effects:

[0077] This solution provides a solution to the challenge of machining deep axial holes in the manufacturing process of moving contacts, significantly improving machining quality and efficiency. Traditional general-purpose fixtures such as three-jaw chucks are insufficient in accurately positioning, reliably clamping, and facilitating easy assembly and disassembly of moving contacts, making it difficult to meet assembly and usage requirements. This solution, however, designs a novel eccentric positioning fixture that effectively solves these problems through the coordinated operation of three components: the main body 100, the locking ring 200, and the unloading ring 300.

[0078] First, the main body 100 has an eccentric cavity inside, which can precisely match the eccentric structure of the moving contact 400. The precise positioning of the moving contact is achieved through the cooperation of the protrusion 110 and the recess 410, ensuring the accuracy requirements of subsequent processing. Second, the design of the locking ring 200 not only facilitates the installation of the moving contact 400, but also enhances the stability of the moving contact 400 during processing through rotational locking, avoiding quality problems caused by vibration or positional misalignment. Furthermore, the introduction of the unloading ring 300 greatly simplifies the removal process of the moving contact 400 after processing, reducing operational difficulty and safety risks. This design is particularly important for improving work efficiency and ensuring worker safety, especially considering that the surface of the moving contact 400 may have grease and potential burrs on its edges.

[0079] Furthermore, this device is also compatible with three-jaw chuck clamping, making it more flexible and adaptable in actual production. This not only improves clamping speed but also facilitates rapid changeover and adjustment during mass production. In summary, this solution, through a series of meticulously designed functional modules, successfully achieves an efficient, accurate, and safe processing method in the manufacturing of the moving contact 400.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A moving contact eccentric positioning fixture, characterized in that: It includes a main body (100), a locking ring (200), and a discharge ring (300); The main body (100) is cylindrical, with a cavity that extends through both ends, and the cavity is offset to one side; The moving contact (400) can be fitted into the cavity; The eccentric dimension of the cavity matches the eccentric dimension of the moving contact (400); The locking ring (200) can lock the moving contact (400); The unloading ring (300) can drive the moving contact (400) to move away from the main body (100).

2. The eccentric positioning fixture for the moving contact according to claim 1, characterized in that: A protrusion (110) is provided inside the cavity. The protrusion (110) engages with the recess (410) of the moving contact (400).

3. The eccentric positioning fixture for the moving contact according to claim 2, characterized in that: The locking ring (200) is inserted into the feed end of the body (100).

4. The eccentric positioning fixture for the moving contact according to claim 3, characterized in that: The feed end of the main body (100) is provided with three long grooves (120) arranged in a ring array along the axis of the main body (100). The long groove (120) connects the inside and outside of the main body (100).

5. The eccentric positioning fixture for the moving contact according to claim 4, characterized in that: The outer wall of the feed end of the main body (100) is provided with a boss (130). The outer wall of the boss (130) slopes outward from the feed end toward the side opposite to the feed end.

6. The eccentric positioning fixture for the moving contact according to claim 5, characterized in that: The locking ring (200) is threaded to the outer wall of the boss (130).

7. The eccentric positioning fixture for the moving contact according to claim 6, characterized in that: The main body (100) has a long groove (140) that runs through the inside and outside on the side opposite to the feed end.

8. The eccentric positioning fixture for the moving contact according to claim 7, characterized in that: The three long grooves (140) are arranged in a ring array along the axis of the body (100).

9. The eccentric positioning fixture for the moving contact according to claim 8, characterized in that: The unloading ring (300) includes a collar (310), a pusher ring (320), and a connecting block (330); The collar (310) is inserted into the body (100) and has a certain gap between it and the inner wall of the body (100); The pusher ring (320) is sleeved with the main body (100) and has a certain gap with the outer wall of the main body (100); The collar (310) and the pusher ring (320) are fixedly connected by a connecting block (330); The connecting block (330) is slidably connected to the long groove (140).

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