Fixing tool for assembling moving contact

Abstract

The utility model relates to the technical field of three-position switches, in particular to a fixing tool for assembling a moving contact. The fixing tool for moving contact assembly comprises a base, a containing groove is formed in the base and used for containing a moving contact body, and the two side groove walls, extending in the length direction of the base, of the containing groove are used for supporting the moving contact body so as to prevent the moving contact body from rolling. A positioning surface which is matched with a corresponding end surface of the moving contact main body to axially position the moving contact main body is arranged at one end of the accommodating groove on the base, the other end of the accommodating groove penetrates through a corresponding end of the base, and avoiding grooves are formed in positions, close to two ends of the accommodating groove, on the base in a transition manner and are used for avoiding watchband contact fingers at two ends of the moving contact main body. As the moving contact main body is kept stable, the mounting tool is ensured not to scratch a watchband contact finger due to rolling of the moving contact main body, meanwhile, the mounting precision of the elastic cylindrical pin can be ensured, a sharp edge left due to improper mounting is avoided, and the operation smoothness of the three-position switch is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-position switches, in particular to a fixing tool for assembling a moving contact. Background Art

[0002] The moving contact of a direct-acting three-position switch is the dynamic contact part of the three-position disconnector, responsible for moving between the closing, opening and grounding positions to achieve circuit connection, disconnection and grounding protection. The moving contact is mostly cylindrical in shape to facilitate smooth movement, such as Figure 1 As shown, the cylindrical moving contact body 1 of the movable contact has a guide block mounting groove reserved along its cross-section midline. A guide block 4 is mounted via an elastic cylindrical pin 5, ensuring that the movable contact maintains linear motion during movement and avoids deviation or shaking. The moving contact body 1 has watchband finger mounting grooves reserved at both ends, and the watchband finger 2 is anchored and mounted via a round pin 3, ensuring that the movable contact can reliably connect the circuit in the closed position and realize power transmission.

[0003] However, during the assembly process, when the cylindrical moving contact body 1 is installing the guide block 4 and the strap contact finger 2, since the cylindrical moving contact body 1 has a certain rolling property, it may not only cause the installation tool for installing the strap contact finger 2 to slip and scratch the strap contact finger, causing damage to the strap contact finger, affecting the stability and reliability of the electrical connection; it may also make the elastic cylindrical pin 5 unable to be installed in place, leaving a pointed tip. These pointed tips affect the smoothness of the closing, opening and grounding operations of the three-position switch in subsequent operations, and in severe cases may cause equipment failure, reducing the safety and stability of the overall system. Utility Model Content

[0004] The purpose of the utility model is to provide a fixing tool for assembling a moving contact, so as to solve the problems in the prior art of damaging the contact fingers of the strap due to the rolling of the moving contact body during the assembly process of the moving contact, and the problems of leaving a pointed end due to improper installation of the elastic cylindrical pin, which affects the smooth operation of the three-position switch.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the fixing tool for assembling the moving contact provided by the utility model is: the fixing tool for assembling the moving contact includes a base, and a receiving groove is provided on the base for accommodating the moving contact body. The groove walls on both sides of the receiving groove extending along the length direction of the base are used to support the moving contact body to prevent the moving contact body from rolling. A positioning surface is provided at one end of the receiving groove on the base for cooperating with the corresponding end face of the moving contact body to axially position the moving contact body. The other end of the receiving groove passes through the corresponding end of the base. The base is provided with an avoidance groove at a transition position near the two ends of the receiving groove for avoiding the strap contact fingers at the two ends of the moving contact body.

[0006] As a further improvement, the cross section of the receiving groove is V-shaped.

[0007] As a further improvement, the depth of the receiving groove is less than 1 / 2 of the corresponding moving contact body.

[0008] As a further improvement, the length of the receiving groove is smaller than the length of the corresponding moving contact body.

[0009] As a further improvement, the cross section of the avoidance groove is rectangular.

[0010] As a further improvement, the base is a polyformaldehyde engineering plastic base.

[0011] As a further improvement, the base is a rectangular body.

[0012] The beneficial effect is that the utility model provides a new fixing tool for assembling moving contacts. When the moving contact body is placed on the base, the strap contact fingers are in the avoidance groove to avoid squeezing or collision. The receiving groove on the base extends along the length direction of the base, and the groove walls on both sides thereof support the moving contact body from both axial sides. One end of the moving contact body is against the positioning surface for axial positioning, which can provide stable support and positioning for the moving contact, ensuring that the moving contact body can remain stable without rolling when installing the guide block and the strap contact fingers, and ensuring that the installation tool will not slip due to the rolling of the moving contact body and scratch the strap contact fingers. At the same time, it can also ensure the installation accuracy of the elastic cylindrical pin, avoid sharp edges left due to improper installation, and thereby improve the operation smoothness and overall performance of the three-position switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the moving contact to which the present utility model is applicable;

[0014] Figure 2 A three-dimensional structural diagram of an embodiment of a fixing tool for assembling a moving contact provided by the present utility model;

[0015] Figure 3 A side view of an embodiment of a fixing tool for assembling a moving contact provided by the present invention;

[0016] Figure 4 A top view of an embodiment of a fixing tool for assembling a moving contact provided by the present invention;

[0017] Figure 5 for Figure 4 Cross-sectional view along the AA axis.

[0018] In the figure: 1. Moving contact body; 2. Watchband contact finger; 3. Round head pin; 4. Guide block; 5. Elastic cylindrical pin; 6. Base; 7. First section receiving groove; 8. First section avoidance groove; 9. Middle receiving groove; 10. Second section avoidance groove; 11. Last section receiving groove. DETAILED DESCRIPTION

[0019] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0020] The moving contact of a direct-acting three-position switch is a key component for realizing the circuit on-off and grounding functions, and its assembly quality is particularly important. Existing moving contacts are mostly cylindrical moving contact bodies, which are prone to rolling under the action of external forces when assembling and fixing the strap contact fingers and guide blocks. This rolling may not only directly cause the installation tools to damage the strap contact fingers, resulting in unstable or failed electrical connections, but may also interfere with the correct installation position of the cylindrical pin, resulting in loose installation or leaving sharp edges. These problems may become a source of failure in the subsequent closing, opening and grounding operations of the switch, causing operation jams, and in severe cases, affecting the safe and stable operation of the entire power system. Based on this, the utility model provides a new fixing tool for assembling moving contacts to solve the problems existing in the above-mentioned prior art.

[0021] The overall design concept of the fixing tool for assembling the moving contact provided by the utility model is: supporting both sides of the moving contact body through the receiving groove on the base, effectively limiting the rolling of the moving contact body during the assembly process, thereby ensuring the accuracy and stability of the assembly, and improving the assembly efficiency and quality.

[0022] Specifically, as a basic technical solution, Figure 1-5 As shown, a fixture for assembling a movable contact includes a base 6 having a receiving groove formed therein. A positioning surface is provided at one end of the receiving groove on the base. The positioning surface is used to cooperate with the corresponding end surface of the movable contact body 1 to axially position the movable contact body 1. The other end of the receiving groove extends through the corresponding end of the base 6. Avoidance grooves are provided at both ends of the receiving groove. The movable contact body 1 is placed within the receiving groove. The groove walls extending along the length of the base 6 support the movable contact body 1 from both sides. One end of the movable contact body 1 abuts the positioning surface, preventing the movable contact body 1 from sliding off one end of the base. This provides stable support and positioning for the movable contact body, effectively preventing the movable contact body from rolling and shaking during assembly, thereby preventing the watchband contact finger 2 from being damaged by the installation tool. Furthermore, this prevents the elastic cylindrical pin 5 from being unable to be pressed into the reserved hole due to rolling of the movable contact body 1, or from being deflected or loosened even after being pressed in, thereby leaving a sharp tip. This ensures accurate assembly of the movable contact. During the entire process of assembling the moving contact, the watchband contact fingers 2 at both ends of the moving contact body 1 are exactly in the avoidance grooves, ensuring that the watchband contact fingers 2 do not have to be squeezed and collided during the assembly process, thereby ensuring the integrity of the watchband contact fingers 2.

[0023] Furthermore, when assembling the moving contact, the operator only needs to place the moving contact body 1 into the receiving groove in the base 6 to complete the constraint on the moving contact body 1, which is simple to operate, shortens the assembly time, and improves the assembly efficiency of the moving contact.

[0024] Based on the above overall introduction to the fixing fixture for assembling the movable contact of the present invention, a more specific embodiment is provided below based on the overall introduction:

[0025] This embodiment focuses on a detailed description of how the receiving groove and the avoidance groove are specifically provided on the base.

[0026] like Figure 2-5 As shown, a positioning surface is provided at one end of the receiving groove, and the other end passes through the corresponding end of the base 6. The receiving groove is opened along the axial direction of the base 6 and extends continuously. Just for the sake of distinction, the two ends of the receiving groove are defined as avoidance grooves. In fact, the avoidance groove is part of the receiving groove. The specific structure of the receiving groove is described in detail below with reference to the accompanying drawings. In this embodiment, as shown in FIG. Figure 2 、 Figure 4 、 Figure 5 As shown, one end of the receiving groove passes through the end of the base 6, and the other end extends to a position close to the end of the base 6, combined with Figure 1 Regarding the specific shape of the movable contact body 1 shown, the base 6 is arranged in the order of a first receiving groove 7, a first relief groove 8, an intermediate receiving groove 9, a second relief groove 10, and a final receiving groove 11. This arrangement allows the receiving grooves to support the movable contact body 1 while protecting the watchband contact fingers 2 from damage. The final receiving groove 11 is a through-type groove, extending directly from the end of the second relief groove 10 to the end of the base 6. This facilitates operation and adjustment during assembly, improving the flexibility and convenience of the tooling. Furthermore, to facilitate the installation of the guide block 4 within the guide block mounting groove, the receiving groove at the other end, namely the first receiving groove 7, is a non-through-type groove. This groove originates from the first relief groove 8 but does not extend to the end of the base, terminating at a distance from the end. To install the guide block 4 into the guide block mounting groove on the movable contact body 1, the operator must pull one end of the guide block 4 from one end of the guide block mounting groove to the other. During this process, the groove wall of the unthrough first-section receiving groove 7 facing the last-section receiving groove 11 constitutes a positioning surface, which can be used for the moving contact body 1 to resist, thereby effectively stopping the moving contact body 1 from moving in the axial direction of the base 6, ensuring the smooth installation of the guide block, avoiding assembly errors caused by the moving contact body being driven to move when pulling the guide block for installation, and improving the assembly efficiency and quality of the moving contact.

[0027] Based on the above overall introduction to the fixing fixture for assembling the movable contact of the present invention, a more specific embodiment is provided below based on the overall introduction:

[0028] This embodiment focuses on the detailed description of the specific shapes of the receiving groove and the avoidance groove.

[0029] like Figure 1-3 As shown, the receiving groove has a V-shaped cross-section. After the movable contact body 1 is placed in the base 6, the two side walls of the V-shaped groove provide support and restraint for the movable contact body 1, effectively preventing it from rolling during installation and improving assembly accuracy. When the elastic cylindrical pin 5 is used to secure the guide block 4 to the movable contact body 1 constrained by the V-shaped groove, the elastic cylindrical pin 5 is ensured to be properly installed, avoiding any sharp points that would affect the smooth movement of the movable contact. Furthermore, when anchoring the watchband contact finger 2 via the round pin 3, damage to the watchband contact finger 2 caused by rolling of the movable contact body 1 by the installation tool is prevented. Furthermore, the V-shaped groove is relatively simple and inexpensive to manufacture, and its design makes the tooling easy to clean and maintain during use, extending its service life. Alternatively, in other embodiments, the receiving groove may have a U-shaped cross-section. Similar to the V-shaped groove, the U-shaped groove provides a certain guiding and positioning function, helping to prevent the movable contact body from rolling.

[0030] More preferably, the depth of the receiving groove is less than 1 / 2 of the corresponding movable contact body 1, thereby facilitating the operator to remove and place the movable contact body 1 from the base 6, thereby improving the assembly efficiency of the movable contact body. In addition, the thickness of the base can be relatively reduced during manufacturing, and the lighter base is more convenient for operators to move and store.

[0031] In this embodiment, the length of the receiving groove is smaller than the length of the corresponding moving contact body 1. When the operator places the corresponding moving contact body 1 on the base 6, one end of the moving contact body 1 is against the positioning surface, and the other end passes through the end of the through receiving groove and exposes one end of the base. While ensuring the positioning effect of the moving contact body, the volume of the base can be further reduced, and it is beneficial for the operator to quickly place the moving contact body 1 at the corresponding position on the base 6, thereby helping to save time and improve the assembly efficiency of the moving contact body.

[0032] To protect the watchband contact finger, the cross-section of the avoidance groove is rectangular. When the moving contact body 1 is placed on the base 6, the rectangular avoidance groove can accommodate the watchband contact finger 2. In addition, the processing technology of the rectangular avoidance groove is mature, the processing is relatively simple and the cost is low.

[0033] Based on the above overall introduction to the fixing fixture for assembling the movable contact of the present invention, a more specific embodiment is provided below based on the overall introduction:

[0034] This embodiment focuses on the detailed description of the base.

[0035] like Figure 2-5As shown, both the watchband contact fingers 2 and the movable contact body 1 are silver-plated. The base 6 is made of polyoxymethylene engineering plastic. Because polyoxymethylene engineering plastic has a low coefficient of friction and excellent wear resistance, when the movable contact body 1 is placed on the base 6, friction and wear between the silver-plated watchband contact fingers 2 and the movable contact body 1 are significantly reduced, thereby protecting the silver-plated layer from damage. The polyoxymethylene engineering plastic base is also highly durable due to its wear resistance, extending the service life of the tooling and reducing the cost and time wasted associated with base replacement.

[0036] In this embodiment, if Figure 1-5 As shown, the base 6 is a rectangular body, and a receiving groove and an avoidance groove are provided on one side surface of the rectangular body. Since the processing technology of the rectangular body is mature, it is conducive to the mass production of tooling, and the rectangular body has a regular shape, which is convenient for operators to carry and facilitate the storage of tooling after the assembly work of the moving contact body is completed.

[0037] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0038] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A fixture for assembling a moving contact, characterized in that: It includes a base, which is provided with a receiving groove for accommodating a moving contact body. The groove walls on both sides of the receiving groove extending along the length direction of the base are used to support the moving contact body to prevent the moving contact body from rolling. The base is provided with a positioning surface at one end of the receiving groove for cooperating with the corresponding end face of the moving contact body to axially position the moving contact body. The other end of the receiving groove passes through the corresponding end of the base. The base is provided with an avoidance groove at a transition position near the two ends of the receiving groove for avoiding the strap contact fingers at the two ends of the moving contact body.

2. The fixing fixture for assembling the moving contact according to claim 1, characterized in that: The cross section of the receiving groove is V-shaped.

3. The fixture for assembling the moving contact according to claim 1, characterized in that: The depth of the receiving groove is less than 1 / 2 of the corresponding moving contact body.

4. The fixture for assembling the moving contact according to claim 1, characterized in that: The length of the receiving groove is smaller than the length of the corresponding moving contact body.

5. The fixing fixture for assembling the moving contact according to any one of claims 1 to 4, characterized in that: The cross section of the avoidance groove is rectangular.

6. The fixing fixture for assembling the moving contact according to any one of claims 1 to 4, characterized in that: The base is made of polyoxymethylene engineering plastic.

7. The fixing fixture for assembling the moving contact according to any one of claims 1 to 4, characterized in that: The base is a rectangular body.

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