Measuring device for the determination of the thickness of a sheet of paper

Abstract

The utility model belongs to the field of circuit breaker trolley switch overhauling equipment, concretely relates to a plum blossom contact dismounting tool. Including support spare and the even distribution of a plurality of support bars in the periphery of support spare, the one side of support spare sets up connecting rod, and the outer contour of support spare is greater than connecting rod, and the movable element is sleeved on connecting rod, and one end of support bar is hinged with movable element, still include the collection mechanism that the support bar is restricted, the support bar is tied to close to connecting rod, and the whole tool becomes compact from loose. Avoid the swing when carrying, and more convenient to extend into the plum blossom contact and do the outside expansion support.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker trolley switch maintenance equipment, specifically relating to a tool for disassembling and assembling plum blossom contacts. Background Technology

[0002] A plum blossom contact disassembly and assembly tool is a tool used for disassembling and installing plum blossom contacts. It achieves disassembly and assembly through nested installation using outwardly expanding contact fingers. For specific structure details, please refer to the publicly available prior art, Chinese utility model CN202222472114.9, "A plum blossom contact disassembly and assembly tool" (see reference). Figure 1 , Figure 2 ),

[0003] In the aforementioned prior art, the tool includes a handle, a guide rod, and a support mechanism. The handle is connected to one end of the guide rod, and the support mechanism includes:

[0004] The central body is fitted onto the guide rod and can move along the axial direction of the guide rod;

[0005] Support rods are evenly distributed on the central body, and their upper ends are hinged to the central body.

[0006] The bottom support is connected to the other end of the guide rod, and the distance between its outer edge contour and the guide rod is greater than the distance between the support rod and the hinge position of the central body and the guide rod.

[0007] When the support end extends into the finger piece, the side wall of the guide rod is tangent to the outer contour of the bottom support. By shortening the distance between the hinge position and the bottom support, the end of the support rod expands outward to support the bound finger piece.

[0008] However, because the tool's various support rods are hinged to the central body, each support rod needs to be gripped and retracted when stored or used. Furthermore, the support rods tend to swing freely when carried, causing unnecessary wear and tear on parts and even reducing their lifespan. Utility Model Content

[0009] Technical problem: The technical problem to be solved by this application is to provide elastic reset constraint for the support rod to prevent it from swinging during carrying, and to increase the convenience of its insertion into the plum blossom contact during use.

[0010] Technical Solution: To address the aforementioned technical problems, this application provides a new technical solution, as follows:

[0011] A tool for disassembling and assembling a Phillips-shaped contact includes a support member and several support rods evenly distributed around the support member. A connecting rod is provided on one side of the support member. The outer contour of the support member is larger than that of the connecting rod. A movable part is sleeved on the connecting rod. One end of the support rod is hinged to the movable part. The tool also includes a constriction mechanism to restrain the support rods, binding them close to the connecting rod, making the entire tool more compact. This prevents swaying during carrying and makes it easier to extend into the Phillips-shaped contact for external support.

[0012] Furthermore, the converging mechanism is a spring connected between the support rods, with lugs on both sides of the support rod for attaching the spring. The springs converge the support rods. Compared to existing technologies, the bottom support member has a rounded end face. This is because, in actual implementation, positioning the spring near the end of the support rod provides a better converging effect. Continuing with the existing flat or concave end face would cause the support member to move backward relative to the support rod end face when the support rod expands outward. Upon completion of the expansion, the spring might extend beyond the end face, and during retraction, the middle of the spring would interfere with the end face, preventing the spring from moving backward relative to the support member.

[0013] Furthermore, the convergence mechanism comprises a plurality of guide rings disposed on the support member, through which the support rods pass. The number of guide rings is the same as the number of support rods, and they are disposed around the support member. The diameter of the guide rings is larger than the cross-sectional profile of the support rods.

[0014] Furthermore, the moving part is sleeved onto the connecting rod and can reciprocate in a linear constrained direction.

[0015] Furthermore, hinge seats corresponding to the number of support rods are provided around the moving parts for hinged connection of the front ends of the support rods.

[0016] Furthermore, a support plate is provided at the end of the support rod, the middle of the support plate is connected to the support rod, and both ends of the support plate are bent toward the central axis of the connecting rod.

[0017] Furthermore, the support plate is an arc-shaped plate.

[0018] Furthermore, the movable component includes a main body and a connecting seat that are connected to each other, a hinge seat is disposed on the connecting seat, and the movable component is provided with a connecting hole that passes through the main body and the connecting seat for cooperating with the connecting rod.

[0019] Furthermore, the connecting hole has an internal thread, and the connecting rod has an external thread. When the connecting rod rotates forward / backward relative to the moving part, the moving part can reciprocate, changing the position of the starting end of the support rod relative to the support part.

[0020] Furthermore, the outer side of the main body is provided with a multi-faceted structure, which is more convenient to hold and grip than the cylindrical central body shape in the prior art.

[0021] Furthermore, a handle is provided on the connecting rod. The handle is located at the outer end of the connecting rod. When disassembling or assembling, after inserting one end of the support rod into the plum blossom contact, while keeping the relative position of the moving parts unchanged, turn the handle outward to make the support part gradually move outward, and at the same time squeeze the support rod outward to make the support plate at the end of the support rod expand outward and support the contact finger plate.

[0022] The beneficial effects of this application are as follows:

[0023] 1. By incorporating a spring on the support rod or a guide ring on the support component as a constriction mechanism, the support rod is bound close to the connecting rod, transforming the tool's structure from loose to compact. This prevents the support rod from swinging freely during carrying or walking, reduces wear on components, and thus extends the tool's service life.

[0024] 2. The retraction mechanism allows the support rod to automatically align with the connecting rod during storage, facilitating the insertion of tools into the plum blossom contact for external support, simplifying the operation process and improving assembly and disassembly efficiency.

[0025] 3. The support component's end face is designed as a circle, which, compared to the flat or concave end faces of existing technologies, avoids the problem of interference between the middle of the spring and the end face when the support rod expands outward. The circular end face ensures smooth movement of the spring during the contraction and expansion of the support rod.

[0026] 4. The outer side of the moving part adopts a multi-faceted structure, which is easier to hold and grip than the cylindrical central body of the existing technology, improving stability and comfort during operation.

[0027] 5. Through the threaded connection between the connecting rod and the moving part, the forward / reverse rotation of the connecting rod can drive the moving part to reciprocate along the connecting rod, precisely adjusting the position of the starting end of the support rod relative to the support part, thereby realizing the flexible expansion of the support plate at the end of the support rod to adapt to different disassembly and assembly needs.

[0028] 6. An arc-shaped support plate is added to the end of the support rod, and both ends of the support plate are bent towards the central axis to enhance the contact area with the finger piece and the support stability, thereby improving the reliability of the outward expansion support. Attached Figure Description

[0029] Figure 1 This is a front view diagram of the prior art;

[0030] Figure 2 This is a three-dimensional schematic diagram of existing technology;

[0031] Figure 3 This is a front view schematic diagram of Embodiment 1 of this application;

[0032] Figure 4 , 5 This is a perspective view of Embodiment 1 of this application;

[0033] Figure 6 This is a front view schematic diagram of the threaded rod according to Embodiment 2 of this application;

[0034] Figure 7 This is a three-dimensional schematic diagram of the threaded rod according to Embodiment 2 of this application;

[0035] Figure 8 This is a schematic diagram of the overall embodiment of this application.

[0036] In the diagram: 1. Threaded rod; 2. Tightening handle; 3. Support component; 4. Nut sleeve; 5. Connecting seat; 6. Hinge seat; 7. Support rod; 8. Spring; 9. Lug; 10. S-shaped bend; 11. Support plate; 12. Guide ring. Detailed Implementation

[0037] Example 1:

[0038] like Figure 3-5 As shown, a tool for disassembling and assembling a plum blossom contact includes a threaded rod 1, and a screw handle 2 is provided at the upper end of the threaded rod 1. The screw handle 2 is cylindrical or polygonal. In this embodiment, the processing method of opening anti-slip grooves on the outer wall of the cylinder is adopted.

[0039] A spherical support 3 is provided at the lower end of the threaded rod 1. The central axis of the threaded rod 1 and the center of the spherical support 3 are close to coincide with each other, and the diameter of the sphere is larger than the diameter of the threaded rod 1.

[0040] A movable part with a threaded hole is provided between the screw handle 2 and the spherical support 3, and the threaded hole is threadedly connected to the threaded rod 1.

[0041] The movable part near the screw handle 2 has a multi-faceted structure, similar to a nut sleeve 4. A connecting seat 5 with a triangular prism shape extends from below the nut sleeve 4. A hinge seat 6 is provided in the middle of the three side walls of the connecting seat 5 for hinged connection of three support rods 7.

[0042] The support rod 7 is cylindrical or polygonal. To provide a stronger end support effect, it is advisable to use a triangular prism or "T" shaped cross section with one edge pointing inward. In this embodiment, a square column is used, and the width in the circular direction pointing to the threaded rod 1 is greater than the width in the tangential direction, which can also provide a better support effect.

[0043] Two lugs 9 are provided on both sides of the support rod 7 for hanging the spring 8. The spring 8 is hung between two adjacent support rods 7, which serves to tighten the support rod 7.

[0044] In some embodiments, positioning the ear 9 near the lower end of the support rod 7 provides a better tightening effect. Therefore, the bottom support 3 needs to be set as a spherical support 3 to prevent the spring 8 from moving upward and encountering the obstruction of the flat end face of the support 3 during the tightening process of the support rod 7.

[0045] The S-shaped bend at the end of the support rod 7 provides a better converging effect, reducing the size of the end support plate 11 to its smallest contour, making it easier to insert into the plum blossom contact.

[0046] The support plate 11 is made into an inward arc shape (inward here means pointing towards the central axis of the threaded rod 1), which allows it to fit the contact finger piece better during support. It is also wider than existing technology.

[0047] Example 2:

[0048] like Figure 6-8 As shown, in Embodiment 2, this application still uses most of the structure of the prior art. Compared with the prior art, its distinguishing technical feature is that a guide ring 12 is provided around the bottom support 3, and the setting angle of the guide ring 12 is close to the tangent line at the middle position of the entire tangential stroke.

[0049] The size of the guide ring 12 should be such that it can be smoothly passed through during the entire process of the support rod 7 running tangentially to the support member 3.

[0050] In this embodiment, the nut sleeve 4 and the connecting seat 5, or the threaded rod 1 and the support member 3, are connected by a relatively rotatable movable connection. Those skilled in the art can refer to other disclosed prior art and implement this connection using methods such as bearing sleeves. The connecting hole on the connecting seat 5 is larger than the connecting hole on the nut sleeve 4.

Claims

1. A tool for disassembling and assembling a plum blossom contact, comprising a support member (3) and a plurality of support rods (7) evenly distributed around the support member (3), wherein a connecting rod is provided on one side of the support member (3), the outer contour of the support member (3) is larger than the connecting rod, a movable part is sleeved on the connecting rod, and one end of the support rod (7) is hinged to the movable part. Its features are, It also includes a converging mechanism for constraining the support rod (7); The converging mechanism is a spring (8) connected between the support rods (7). The support rods (7) have lugs (9) on both sides for attaching the spring (8). The bottom end face of the support member (3) is circular.

2. The tool for disassembling and assembling a plum blossom contact as described in claim 1, characterized in that, The convergence mechanism consists of several guide rings (12) disposed on the support member (3), and the support rod (7) passes through the guide rings (12).

3. A tool for disassembling and assembling a plum blossom contact as described in claim 1 or 2, characterized in that, The movable part is sleeved on the connecting rod and the connecting rod direction is constrained to reciprocate; the movable part is provided with hinge seats (6) corresponding to the number of the support rods (7) for hinged connection of the front end of the support rods (7).

4. The tool for disassembling and assembling a plum blossom contact as described in claim 3, characterized in that, The support rod (7) is provided with a support plate (11) at its end. The support plate (11) is connected to the support rod (7) at its middle part. Both ends of the support plate (11) are bent toward the central axis of the connecting rod.

5. The tool for disassembling and assembling a plum blossom contact as described in claim 4, characterized in that, The support plate (11) is an arc-shaped plate.

6. The tool for disassembling and assembling a plum blossom contact as described in claim 3, characterized in that, The movable component includes a main body and a connecting seat (5) that are connected to each other. The hinge seat (6) is disposed on the connecting seat (5). The movable component is provided with a connecting hole that passes through the main body and the connecting seat (5) for connecting the connecting rod.

7. A tool for disassembling and assembling a plum blossom contact as described in claim 6, characterized in that, The connecting hole has an internal thread, and the connecting rod has an external thread.

8. A tool for disassembling and assembling a plum blossom contact as described in claim 7, characterized in that, The outer side of the main body is provided with a multi-faceted structure.

9. A tool for disassembling and assembling a plum blossom contact as described in any one of claims 4-8, characterized in that, A handle is provided on the connecting rod.

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