CN221833831U - Clamp for machining center insert of insulator - Google Patents

Abstract

The utility model relates to the manufacturing field of power equipment accessories, and in particular to a clamp for processing the center insert of an insulator. The clamp for processing the center insert of an insulator comprises a fixing plate, a receiving hole is provided on the fixing plate, and the receiving hole is also provided with a limiting structure for cooperating with the protrusion of the center insert, and the clamp also comprises a pressing plate arranged on the plate surface of the fixing plate. By arranging the limiting structure and the pressing plate for cooperating with the protrusion on the receiving hole, it is convenient to fix the center insert, and since only the protrusion of the center insert is limited, the end face of the center insert will not be blocked after the clamping is completed, thereby solving the problem in the prior art that the center insert of the insulator is clamped by a chuck during processing, and the chuck clamping will block one of the end faces, resulting in the need for two clampings, which causes cumbersome operation, and the silver-plated layer of the end face is easily scratched during the second clamping.

Description

A clamp for machining the center insert of an insulator

Technical Field

The utility model relates to the manufacturing field of power equipment accessories, in particular to a clamp for processing a central insert of an insulator.

Background Art

Gas Insulated Metal-enclosed Switchgear (GIS) is often manufactured and used in a modular setting. Usually, GIS is divided into multiple cylinders, each of which is equipped with a conductive rod, and an insulator is arranged at the end of the cylinder. The insulator can separate the multiple cylinders and support the conductive rod at the same time.

The insulator includes an insulating part for docking with the end of the cylinder and a central insert located in the center for fixing the conductive rod. In order to facilitate the conductive connection between the conductive rods, the central insert is made of metal, thereby serving the purpose of connecting the current of the conductive rods on both sides. For example, a Chinese invention patent application with application publication number CN109243728A and application publication date January 18, 2019 discloses a DC gas-insulated metal-enclosed transmission line insulator, which includes an insulating part and a central insert (i.e., a central insert). The central insert is generally cylindrical, and a protrusion is provided on the outer peripheral surface of the central insert to facilitate integral molding with the insulating part. The two end faces of the central insert are to be electrically connected to the conductive rod, so threaded holes are provided on the two end faces of the central insert, which are directly connected to the conductive rod through the threaded holes or connected to the conductive rod by installing a static contact. A positioning pin hole or a light hole such as a vent hole is also provided on the end face. In addition, a silver-plated surface is often provided on the end face.

In the prior art, the processing of the threaded hole on the center insert is often done by clamping the outer circumference of the center insert with a chuck, and then processing the end face of the center insert to form the threaded hole and the pin shaft hole. Since the chuck blocks the other surface at this time, it needs to be disassembled and clamped again. During the secondary clamping process, it is necessary to ensure that the threaded holes on both sides are facing each other, so it is necessary to first position them, and complete the positioning through the cooperation of the pin shaft and the pin shaft hole, and then clamp the outer circumference of the center insert for processing.

In the above processing scheme, since a chuck is used for clamping, and the chuck will block one of the faces when clamping, it is necessary to clamp twice, and the processing process is relatively cumbersome. In addition, when processing the second end face, in order to ensure the centering with the first end face, it is necessary to use a pin for positioning. During the positioning process, the pin is easy to rub against the end face, causing damage to the silver-plated layer of the end face.

Utility Model Content

The purpose of the utility model is to provide a clamp for processing the center insert of an insulator, which is used to solve the problem that in the prior art, the center insert of the insulator is clamped by a chuck during processing, and the chuck clamping will block one of the end faces, resulting in cumbersome operation due to the need for clamping twice, and the silver-plated layer of the end face is easily scratched during the second clamping.

In order to achieve the above-mentioned purpose, the clamp for processing the center insert of the insulator in the utility model adopts the following technical solution:

A clamp for processing a center insert of an insulator comprises a fixing plate, on which is provided a receiving hole for accommodating the center insert, the receiving hole penetrates the fixing plate in the thickness direction of the fixing plate so that both end faces of the center insert are exposed when the center insert is clamped, the receiving hole is also provided with a limiting structure for cooperating with a stopper of a protrusion of the center insert, the clamp also comprises a pressing plate arranged on the plate surface of the fixing plate for pressing the protrusion of the center insert on a side away from the limiting structure.

Furthermore, a step structure is provided in the accommodating hole, the step structure constitutes the limiting structure, and a large diameter section and a small diameter section are formed on both sides of the accommodating hole located at the step structure.

Furthermore, the step surface is a fitting surface that fits and limits the position of one side of the protruding portion of the central insert.

Furthermore, fixing structures for being fixed by a machine tool are also provided on the side surfaces of the opposite sides of the fixing plate.

Furthermore, the fixed structure on one side surface is a positioning shaft, and the fixed structure on the other side surface is a positioning hole, and the axes of the positioning shaft and the positioning hole are collinear.

Furthermore, threaded holes for fixing a pressure plate are arranged on the plate surface of the fixing plate, and the pressure plate is pressed against the center insert to be machined by bolts assembled in the threaded holes.

Furthermore, at least two pressing plates are provided, and the plurality of pressing plates are arranged at intervals along the outer circumference of the accommodating hole.

Furthermore, the pressure plate includes a self-adjusting pressure plate, which is provided with a clamping portion for clamping the center insert to be machined and a mounting hole corresponding to the threaded hole on the fixed plate for the bolt to pass through, and a top supporting portion protruding from the plate surface of the self-adjusting pressure plate is also provided at one end of the self-adjusting pressure plate located away from the clamping portion in the mounting hole.

Furthermore, the supporting portion includes an adjusting bolt, and the adjusting bolt is used to abut against the plate surface of the fixing plate when clamping the center insert to be machined.

Furthermore, there are two accommodating holes and at least three pressure plates, at least one of the multiple pressure plates is a common pressure plate, which is located in the middle of the two accommodating holes for simultaneously pressing two center inserts to be machined, and the other pressure plates are arranged on the periphery of the accommodating holes for pressing one of the center inserts to be machined.

The beneficial effects of the clamp for processing the center insert of an insulator in the utility model are as follows: the utility model pioneers a clamp for processing the center insert of an insulator, and by providing a fixing plate with a receiving hole, it is convenient to accommodate and place the center insert to be processed, and because the receiving hole penetrates the fixing plate, it is convenient to expose the two end faces of the center insert after clamping is completed; by providing a limiting structure and a pressing plate on the receiving hole for stopping the protrusion, it is convenient to fix the center insert, and because only the protrusion of the center insert is limited, the end face of the center insert will not be blocked after clamping is completed, that is, when the center insert is clamped, the end face of the center insert is not blocked, and thus there is no need to clamp twice, and only one clamping is needed to complete the processing of the two end faces, thereby solving the problem that the center insert of the insulator in the prior art is clamped by a chuck during processing, and the chuck clamping will block one of the end faces, resulting in cumbersome operation caused by the need for two clampings, and the silver-plated layer of the end face is easily scratched during the second clamping.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional view of an embodiment of a fixture for machining a center insert of an insulator in the utility model;

FIG. 2 is a top view of an embodiment of a fixture for machining a center insert of an insulator in the utility model.

In the figure: 1, fixing plate; 11, positioning shaft; 12, positioning hole; 13, receiving hole; 14, fitting surface; 15, threaded hole.

DETAILED DESCRIPTION

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

In the utility model, the center insert is limited and fixed by arranging a fixing plate and a pressing plate for pressing the protruding portion of the center insert. Since only the protruding portion of the center insert is limited, the two end faces of the center insert can be exposed, thereby facilitating one-time clamping and processing of the two end faces respectively.

In the embodiment 1 of the clamp for processing the center insert of the insulator (hereinafter referred to as the clamp for the center insert) of the utility model:

As shown in Figures 1 and 2, the center insert clamp in this embodiment includes a fixing plate 1 and a pressure plate (not shown in the figures), wherein the fixing plate 1 is provided with a receiving hole 13 for accommodating the center insert, and the receiving hole 13 penetrates the fixing plate 1 in the thickness direction of the fixing plate 1 so that both end surfaces of the center insert are exposed when the center insert is clamped. In order to facilitate the limiting and fixing of the center insert placed in the receiving hole 13, a limiting structure for cooperating with the protruding stop of the center insert is also provided in the receiving hole 13. Specifically, the receiving hole 13 is a stepped hole, and the stepped surface of the stepped hole constitutes a limiting structure, wherein a large diameter section and a small diameter section are formed on both sides of the stepped surface of the receiving hole 13, respectively. For limiting, the diameter of the large diameter section is not less than the diameter of the protruding portion of the center insert, and the diameter of the small diameter section is greater than the diameter of the end of the center insert but smaller than the diameter of the protruding portion of the center insert. That is to say, when the center insert is placed in the receiving hole 13, the protruding portion of the center insert is located in the large diameter section, and one of the end faces of the center insert passes through the small diameter section or is located in the small diameter section, thereby not affecting the processing of the end face. Of course, in other embodiments, it is also possible not to set a step structure in the receiving hole 13, but to set the diameter of the receiving hole 13 to be greater than the diameter of the end of the center insert but smaller than the diameter of the protruding portion of the center insert, and use the edges of the receiving hole 13 to limit the protruding portion of the center insert. It is worth noting that the thickness of the fixing plate 1 is preferably smaller than the height of the central insert. In this embodiment, the thickness of the fixing plate 1 is set to 60 mm. If the thickness of the central insert changes, other thickness dimensions may also be used.

As shown in FIG1 , when the step faces the protrusion of the center insert, in order to better limit the position and avoid damaging the protrusion, the step surface is a fitting surface 14 that fits and limits the side of the protrusion of the center insert. The fitting surface 14 can maintain a large contact area when in contact with the protrusion, thereby facilitating the dispersion of the force on the protrusion during the clamping process. At the same time, since the fitting surface 14 fits the protrusion, the position of the center insert can be better fixed when placed. Of course, in other embodiments, the fitting surface 14 may no longer be provided, but only a flush stop surface may be provided, and the stop surface may be used to stop and limit the side of the protrusion.

The accommodating hole 13 can only stop and limit one side of the center insert. In order to limit and fix both sides of the center insert at the same time to facilitate processing, a pressure plate connected to the plate surface of the fixing plate 1 is provided to press the protrusion of the center insert away from the limiting structure.

In order to improve the processing efficiency, two receiving holes 13 are provided on the fixed plate 1, so as to facilitate the processing of two center inserts at the same time. In order to press the two center inserts at the same time, three pressing plates are provided, one of which is a common pressing plate and the other two are self-adjusting pressing plates. The common pressing plate is located in the middle of the two receiving holes 13 for simultaneously pressing the two center inserts to be processed, and the self-adjusting pressing plate is arranged on the periphery of the receiving holes 13 for pressing one of the center inserts to be processed. Of course, in other embodiments, only one pressing plate may be provided, and a perforation is provided on the pressing plate for exposing the end face of the center insert. In this case, whether there are one or two receiving holes 13, only this one pressing plate may be used for pressing. Alternatively, in other embodiments, four pressing plates, five pressing plates or other numbers of pressing plates may be provided. Alternatively, in other embodiments, a common pressing plate is no longer provided, but at least four self-adjusting pressing plates are provided, and the two center inserts are respectively pressed by the four self-adjusting pressing plates. Alternatively, in other embodiments, only one accommodating hole 13 may be provided, and at least two pressing plates are provided around the accommodating hole 13, so that the central insert is pressed by the multiple pressing plates.

As shown in FIG2 , in order to set the pressing plate on the fixed plate 1, a threaded hole 15 is also provided on the fixed plate 1, and a mounting hole for the bolt to pass through is provided on the pressing plate, that is, the pressing plate is connected to the fixed plate 1 by bolts, and the pressing plate is pressed against the protruding portion of the central insert by tightening the bolts. Of course, in other embodiments, if there is only one pressing plate, buckles can also be provided at both ends of the pressing plate and the fixed plate 1 to clamp the pressing plate and the fixed plate 1. There are three threaded holes 15 in total, one of which is provided on the line connecting the centers of the two receiving holes 13, and the threaded hole 15 is used to install a common pressing plate. In addition, a threaded hole 15 is provided on the line connecting the two receiving holes 13, and the two threaded holes 15 are respectively used to install a self-adjusting pressing plate. The common pressing plate is a rectangular plate, and when the common pressing plate is in use, its two sides respectively press one of the central inserts, thereby achieving balance on both sides. The self-adjusting pressing plate has only one side for pressing the central insert to be processed, so an additional structure needs to be provided for clamping. It is worth noting that, in the present embodiment, in order to have sufficient torque when the bolts are pressing the pressure plate, M12 bolt holes are used. Of course, bolt holes of other specifications may also be used as long as the torque requirements are met.

Specifically, the self-adjusting pressure plate is provided with a clamping portion for clamping the center insert to be machined and a mounting hole for corresponding to the threaded hole 15 on the fixed plate 1 for the bolt to pass through. The end of the self-adjusting pressure plate located at the mounting hole away from the clamping portion is also provided with a top support portion protruding from the plate surface of the self-adjusting pressure plate. The top support portion includes an adjustment bolt and an adjustment threaded hole for the adjustment bolt to pass through. One end of the adjustment bolt passes through the plate surface of the self-adjusting pressure plate and the plate surface of the fixed plate 1 to abut against each other. By adjusting the different tightening degrees of the adjustment bolt, the length of the adjustment bolt extending on the self-adjusting pressure plate is different. That is to say, when the self-adjusting pressure plate clamps the protruding portion of the center insert to be machined, the clamping portion abuts against the protruding portion. At this time, the end of the adjustment bolt abuts against the fixed plate 1. The clamping portion and the top support portion are respectively located on both sides of the mounting hole, so that the torque on both sides of the mounting hole can be balanced, which is convenient for clamping the protruding portion of the center insert. Of course, in other embodiments, the supporting part on the self-adjusting platen can be set as a fixed block protruding from the plate surface of the self-adjusting platen, and the fixed block is supported by abutting against the plate surface of the fixed plate 1. Alternatively, the supporting part may not be set, but a gasket may be placed between the fixed plate 1 and the self-adjusting platen during use to support the self-adjusting platen.

In the embodiment 2 of the clamp for processing the center insert of the insulator (hereinafter referred to as the clamp for the center insert) in the utility model:

This embodiment is improved on the basis of the embodiment 1, and fixing structures are provided on both sides of the fixing plate 1 to facilitate clamping by a machine tool, thereby facilitating processing.

As shown in Figures 1 and 2, since the center insert needs to be processed on both its end faces, during the processing, the receiving hole 13 can be kept vertically arranged so that one of the end faces of the center insert to be processed faces upward, and the end face is processed first, and then the center insert to be processed is turned 180 degrees together with the center insert with a fixture so that the other face faces upward, which is convenient for processing the other end face. Of course, in other embodiments, tools can also be set at the upper and lower ends of the machine tool for processing, and in this case, the center insert does not need to be turned over by the fixture during the processing.

Specifically, fixed structures for being fixed by a machine tool are provided on the side surfaces on opposite sides of the fixed plate 1, that is, there are two fixed structures. In the present embodiment, one of the fixed structures is a positioning shaft, and the other fixed structure is a positioning hole 12. Specifically, the positioning shaft 11 is cylindrical, so that it is convenient to fix it with a three-jaw chuck on a machine tool, and the positioning hole 12 is a conical blind hole, so that it is convenient to tighten it with the tailstock on the machine tool, and the axes of the positioning shaft 11 and the positioning hole 12 are colinear. During processing, the three-jaw chuck can be used to lock the positioning shaft 11, and the tailstock can be used to tighten the positioning hole 12, so that one of the end faces of the center insert is arranged upward. After the end face is processed, the three-jaw chuck is controlled to rotate 180 degrees so that the other end face of the center insert is facing upward, and then the other end face is processed.

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

Claims (10)

1. A clamp for processing the center insert of an insulator, characterized in that it includes a fixing plate, a receiving hole for receiving the center insert is provided on the fixing plate, the receiving hole penetrates the fixing plate in the thickness direction of the fixing plate so that both end faces of the center insert are exposed when the center insert is clamped, the receiving hole is also provided with a limiting structure for cooperating with the protrusion of the center insert, and the clamp also includes a pressing plate provided on the plate surface of the fixing plate for pressing the protrusion of the center insert on the side away from the limiting structure. 2. The clamp for processing the center insert of an insulator according to claim 1 is characterized in that: the accommodating hole is a stepped hole, the stepped surface of the stepped hole constitutes the limiting structure, and the large diameter section and the small diameter section are formed on both sides of the stepped surface of the accommodating hole respectively. 3. The fixture for processing the center insert of an insulator according to claim 2, wherein the step surface is a fitting surface that fits and limits the position of one side of the protruding portion of the center insert. 4. The fixture for machining the center insert of an insulator according to any one of claims 1 to 3, characterized in that fixing structures for being fixed by a machine tool are also provided on the side surfaces on opposite sides of the fixing plate. 5. The fixture for processing the center insert of an insulator according to claim 4 is characterized in that the fixed structure on one side is a positioning shaft, the fixed structure on the other side is a positioning hole, and the axes of the positioning shaft and the positioning hole are collinear. 6. The fixture for machining the center insert of an insulator according to any one of claims 1-3, characterized in that: a threaded hole for fixing a pressure plate is provided on the plate surface of the fixing plate, and the pressure plate presses the center insert to be machined by bolts assembled in the threaded holes. 7. The fixture for processing the center insert of an insulator according to claim 6, characterized in that: at least two pressing plates are provided, and the plurality of pressing plates are arranged at intervals along the outer circumference of the accommodating hole. 8. The clamp for processing the center insert of an insulator according to claim 7 is characterized in that: the pressure plate includes a self-adjusting pressure plate, and the self-adjusting pressure plate is provided with a clamping portion for clamping the center insert to be processed and a mounting hole for corresponding to the threaded hole on the fixing plate for the bolt to pass through, and the end of the self-adjusting pressure plate located at the mounting hole away from the clamping portion is also provided with a top support portion protruding from the plate surface of the self-adjusting pressure plate. 9. The clamp for machining the center insert of an insulator according to claim 8, characterized in that the supporting portion comprises an adjusting bolt, and the adjusting bolt is used to abut against the plate surface of the fixing plate when clamping the center insert to be machined. 10. The clamp for processing the center insert of an insulator according to claim 6 is characterized in that: there are two receiving holes, at least three pressure plates, at least one of the multiple pressure plates is a common pressure plate, the common pressure plate is located in the middle of the two receiving holes to simultaneously press the two center inserts to be processed, and the other pressure plates are arranged on the periphery of the receiving holes to press one of the center inserts to be processed.