Tool for machining crank arm in high-voltage switch

Abstract

The utility model provides a tool for machining a crank arm in a high-voltage switch, which relates to the field of fixing tools and comprises a disc base, a first limiting nail, a second limiting nail and a pressing piece. If the disc base is horizontally arranged, the first limiting nail and the second limiting nail are fixed to the upper surface of the disc base and located on the two sides of the circle center of the disc base respectively. The pressing piece comprises a stud, a sleeve, a spring, a pressing plate and a fixing bolt; the stud is fixed with the upper surface of the disc base; the sleeve and the spring sleeve the outer side of the stud; the sleeve is positioned above the spring; the pressing plate is horizontally arranged and fixed to the top of the sleeve. The pressing plate is provided with a through hole for the fixing bolt to penetrate through. And the leading-in part of the fixing bolt penetrates through the through hole and is fixed in the screw hole of the stud. According to the utility model, the problem that when the output hole is processed in the prior art, if the driving crank arm is not stably fixed, the processing equipment deviates from the position to be processed of the driving crank arm is solved; the crank arm is in a stable state in the machining process.

Description

Technical Field

[0001] This utility model relates to the field of fixed tooling, and in particular to a tooling for machining crank arms in high-voltage switches. Background Technology

[0002] A high-voltage switch is a device used to open and close conductive circuits. The operating mechanism is used in grounding switches and disconnecting switches. For example, Chinese patent application number 201220479724.5 discloses an operating mechanism for a high-voltage switch, including a transmission assembly, a crank arm assembly, and a spring assembly. The transmission assembly consists of an output shaft and a bushing, and the transmission assembly and the crank arm assembly are orthogonally coupled. The crank arm assembly includes a driving crank arm, a driven crank arm, a movable pin sleeve, a connecting pin, and a connecting bolt. Two identical driving crank arms, two connecting pins, and an L-shaped driven crank arm constitute a combined cam crank arm. The spring assembly includes a pressure spring and a guide rod.

[0003] Among them, active crutches such as Figure 3 As shown, the crank arm 0 is plate-shaped; the crank arm 0 has a first connecting hole 01, a second connecting hole 02, an output hole 03, and a fixing hole 04; the first connecting hole 01, the second connecting hole 02, the output hole 03, and the fixing hole 04 are located on the same straight line; the first connecting hole 01, the output hole 03, the second connecting hole 02, and the fixing hole 04 are arranged sequentially; the edge of the crank arm 0 includes a first straight edge 001, a second straight edge 002, a third straight edge 003, a fourth straight edge 004, a first arc edge 005, a second arc edge 006, a third arc edge 007, and a fourth arc edge 008; the first straight edge 001, the second straight edge 002, the third straight edge 003, and the fourth straight edge 004 are connected end to end; the first straight edge... 001 and the second straight edge 002 form an acute angle, and the first arc edge 005 connects the first straight edge 001 and the second straight edge 002; the second straight edge 002 and the third straight edge 003 form an obtuse angle, and the second arc edge 006 connects the second straight edge 002 and the third straight edge 003; the third straight edge 003 and the fourth straight edge 004 form an acute angle, and the third arc edge 007 connects the third straight edge 003 and the fourth straight edge 004; the fourth straight edge 004 and the first straight edge 001 form an obtuse angle, and the fourth arc edge 008 connects the fourth straight edge 004 and the first straight edge 001; the first connecting hole 01 is close to the first arc edge 005; the fixing hole 04 is close to the third arc edge 007.

[0004] When using the active crank arm, the bushing needs to be fitted into the output hole, and then the output shaft needs to be fitted into the bushing. Therefore, the accuracy of the output hole affects whether the output shaft can drive the active crank arm. Thus, when machining the output hole, if the active crank arm is not fixed securely, and the machining equipment deviates from the position required for machining the active crank arm, the accuracy of the output hole will be deviated, which will affect the subsequent assembly and use of the active crank arm. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a tooling for machining crank arms in high-voltage switches. This tooling solves the problem that, in the prior art, if the active crank arm is not securely fixed during the machining of the output hole, the machining equipment may deviate from the required machining position of the active crank arm, leading to a deviation in the accuracy of the output hole and affecting the subsequent assembly and use of the active crank arm. This tooling ensures that the crank arm remains stable during the machining process.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a tooling for processing crank arms in high-voltage switches, including a disc base, a first limiting pin, a second limiting pin, and a clamping component; if the disc base is horizontally arranged, the first limiting pin and the second limiting pin are fixed to the upper surface of the disc base; the first limiting pin and the second limiting pin are respectively located on both sides of the center of the disc base;

[0008] The clamping component includes a stud, a sleeve, a spring, a pressure plate, and a fixing bolt; the stud is fixed to the upper surface of the disc base; the sleeve is sleeved on the outside of the stud; the spring is sleeved on the outside of the stud; the sleeve is located above the spring; the pressure plate is horizontally arranged and fixed to the top of the sleeve; the pressure plate has a through hole for the fixing bolt to pass through; the guide portion of the fixing bolt passes through the through hole and is fixed in the threaded hole of the stud;

[0009] When the crank arm is fixedly installed on the tooling, the first limiting pin is sleeved in the first connecting hole, the second limiting pin is sleeved in the second connecting hole, the fixing bolt is tightened in the stud, the sleeve compresses the spring, and the pressure plate presses the crank arm tightly onto the disc base.

[0010] The tooling for machining the crank arm in a high-voltage switch provided by this utility model preferably has a boss at the bottom end of both the first limiting pin and the second limiting pin.

[0011] The tooling for machining crank arms in high-voltage switches provided by this utility model preferably further includes a positioning component; the positioning component has a first positioning groove; the first positioning groove is located between the first limiting pin and the second limiting pin; the opening of the first positioning groove faces the center of the disc base; the first positioning groove extends vertically to the edge of the clamping component;

[0012] When the crank arm is fixedly installed on the tooling, the fourth arc edge of the crank arm is in contact with the first positioning groove.

[0013] The tooling for machining crank arms in high-voltage switches provided by this utility model preferably has one end of the pressure plate near the center of the disc base as the front end of the pressure plate, and a second positioning groove is provided on the front end surface of the pressure plate; the second positioning groove extends downward to the bottom of the pressure plate;

[0014] When the crank arm is fixedly installed on the tooling, the second arc edge of the crank arm is in contact with the second positioning groove.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] The tooling for machining crank arms in high-voltage switches provided by this utility model includes a disc base, a first limiting pin, and a second limiting pin. If the disc base is horizontally set, the first limiting pin and the second limiting pin are fixed to the upper surface of the disc base. When the first limiting pin is sleeved in the first connecting hole and the second limiting pin is sleeved in the second connecting hole, the side wall of the first limiting pin is in close contact with the side wall of the first connecting hole, and the side wall of the second limiting pin is in close contact with the side wall of the second connecting hole. The first limiting pin and the second limiting pin limit the crank arm in the horizontal direction.

[0017] It also includes a clamping component, which comprises a stud, a sleeve, a spring, a pressure plate, and a fixing bolt. The stud is fixed to the upper surface of the disc base, and the sleeve is fitted onto the outside of the stud, allowing partial overlap between the sleeve and the stud to control the height of the sleeve. Furthermore, the pressure plate is horizontally positioned and fixed to the top of the sleeve. The height of the pressure plate is controlled by the sleeve. As the sleeve moves downward, the stud gradually extends into the sleeve, lowering the height of the pressure plate. This allows the pressure plate to contact the crank arm placed on the disc base, thus pressing the crank arm firmly against the disc base. Further, a spring is fitted onto the outside of the stud, and the sleeve is positioned above the spring. The spring can raise the sleeve relative to the stud. The height of the disc base, which in turn raises the height of the pressure plate, creates a gap between the pressure plate and the crank arm, reducing interference to the crank arm during installation and removal. Simultaneously, during crank arm installation and removal, the sleeve can rotate relative to the stud, changing the orientation of the pressure plate and moving its edge away from the crank arm. This allows installers to remove the crank arm from the limiting pin from bottom to top, preventing obstruction during installation and removal, thus facilitating the process. Furthermore, the pressure plate has through holes for the fixing bolts to pass through. The bolt's guide portion passes through the through hole and is fixed in the stud's threaded hole. At this point, the bottom of the pressure plate contacts the crank arm, and the pressure plate is pressed against the stud by the fixing bolt, thus limiting the crank arm in the vertical direction.

[0018] The horizontal and vertical directions mentioned above refer to the directions when the disc base is set horizontally;

[0019] In existing technologies, if the active crank arm is not securely fixed during the processing of output holes, the processing equipment may deviate from the required processing position of the active crank arm, resulting in a deviation in the accuracy of the output hole and affecting the subsequent assembly and use of the active crank arm. The tooling for processing crank arms in high-voltage switches provided by this utility model uses a first and a second limiting pin to limit the crank arm in the horizontal direction, and a pressure plate and components that fix the pressure plate to limit the crank arm in the vertical direction, thereby achieving stable fixing of the crank arm on the disc base. When the disc base is fixed to the machine tool spindle, the crank arm is kept in a stable state during the processing. Attached Figure Description

[0020] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the tooling for machining the crank arm in a high-voltage switch provided in Embodiment 1 of this utility model.

[0022] Figure 2This is a schematic diagram of the main structure of the tooling for machining the crank arm in a high-voltage switch provided in Embodiment 1 of this utility model.

[0023] Figure 3 This is a top view of the crank arm structure in the background technology. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0025] Example 1:

[0026] like Figure 1 As shown, Embodiment 1 of this utility model provides a tooling for processing crank arms in high-voltage switches, including a disc base 1, a first limiting pin 2, a second limiting pin 3, and a clamping member 4; if the disc base 1 is horizontally arranged, the first limiting pin 2 and the second limiting pin 3 are fixed to the upper surface of the disc base 1; the first limiting pin 2 and the second limiting pin 3 are respectively located on both sides of the center of the disc base 1;

[0027] The clamping component 4 includes a stud 41, a sleeve 42, a spring 43, a pressure plate 44, and a fixing bolt 45; the stud 41 is fixed to the upper surface of the disc base 1; the sleeve 42 is sleeved on the outside of the stud 41; the spring 43 is sleeved on the outside of the stud 41; the sleeve 42 is located above the spring 43; the pressure plate 44 is horizontally arranged and fixed to the top of the sleeve 42; the pressure plate 44 has a through hole 441 for the fixing bolt 45 to pass through; the guide part of the fixing bolt 45 passes through the through hole 441 and is fixed in the screw hole of the stud 41;

[0028] When the crank arm 0 is fixedly installed on the tooling, the first limiting pin 2 is sleeved in the first connecting hole 01, the second limiting pin 3 is sleeved in the second connecting hole 02, the fixing bolt 45 is tightened in the stud 41, the sleeve 42 compresses the spring 43, and the pressure plate 44 presses the crank arm 0 onto the disc base 1.

[0029] When using the tooling provided in Embodiment 1 of this utility model for machining the crank arm in a high-voltage switch, the first limiting pin 2 is sleeved in the first connecting hole 01, and the second limiting pin 3 is sleeved in the second connecting hole 02. At this time, the center of the output hole 03 coincides with the center of the disc base 1. Rotate the sleeve 42 so that the edge of the pressure plate 44 stays above the crank arm 0. Press down the pressure plate 44 so that the bottom of the pressure plate 44 presses the crank arm 0. At this time, the stud 41 extends into the sleeve 42, the spring 43 is compressed, and the guide part of the fixing bolt 45 passes through the through hole 441 and is tightened into the screw hole of the stud 41. Fix the disc base 1 to the machine tool spindle so that the axis of the disc base 1 coincides with the axis of the machine tool spindle. Face the side with the crank arm 0 to the tool. Rotate the machine tool spindle so that the disc base 1 rotates, thereby driving the crank arm 0 to rotate, so that the tool can turn the output hole.

[0030] The tooling for machining the crank arm in a high-voltage switch provided in Embodiment 1 of this utility model includes a disc base 1, a first limiting pin 2, and a second limiting pin 3. If the disc base 1 is horizontally set, the first limiting pin 2 and the second limiting pin 3 are fixed to the upper surface of the disc base 1. When the first limiting pin 2 is sleeved in the first connecting hole 01 and the second limiting pin 3 is sleeved in the second connecting hole 02, the side wall of the first limiting pin 2 is in close contact with the side wall of the first connecting hole 01, and the side wall of the second limiting pin 3 is in close contact with the side wall of the second connecting hole 02. The first limiting pin 2 and the second limiting pin 3 limit the crank arm 0 in the horizontal direction.

[0031] It also includes a clamping component 4, which includes a stud 41, a sleeve 42, a spring 43, a pressure plate 44, and a fixing bolt 45. The stud 41 is fixed to the upper surface of the disc base 1, and the sleeve 42 is sleeved on the outside of the stud 41, so that the sleeve 42 can partially overlap with the stud 41, thereby controlling the height of the sleeve 42. On this basis, the pressure plate 44 is set horizontally and fixed to the top of the sleeve 42. The height of the pressure plate 44 can be controlled by the sleeve 42. When the sleeve 42 moves downward, the stud 41 gradually extends into the sleeve 42, and the height of the pressure plate 44 decreases, so that the pressure plate 44 can contact the crank arm 0 placed on the disc base 1, thereby pressing the crank arm 0 against the disc base 1. Furthermore, the spring 43 is sleeved on the outside of the stud 41, and the sleeve 42 is located above the spring 43. The spring 43 can... Raising the height of the sleeve 42 relative to the disc base 1 increases the height of the pressure plate 44, creating a gap between the pressure plate 44 and the crank arm 0. This reduces interference to the crank arm 0 during installation and removal. Simultaneously, during installation and removal of the crank arm 0, the sleeve 42 can rotate relative to the stud 41, changing the orientation of the pressure plate 44 and moving its edge away from the crank arm 0. This allows installers to remove the crank arm 0 from the limiting pin from bottom to top, preventing obstruction during installation and removal, thus facilitating the process. Furthermore, the pressure plate 44 has a through hole 441 for the fixing bolt 45 to pass through. The guide portion of the fixing bolt 45 passes through the through hole 441 and is fixed in the screw hole of the stud 41. At this time, the bottom of the pressure plate 44 contacts the crank arm 0, and the pressure plate 44 is pressed against the stud 41 by the fixing bolt 45, thus limiting the crank arm 0 in the vertical direction.

[0032] The horizontal and vertical directions mentioned above refer to the directions when the disc base 1 is set horizontally;

[0033] In existing technologies, if the active crank arm is not securely fixed during the processing of the output hole, the processing equipment may deviate from the required processing position of the active crank arm, resulting in a deviation in the accuracy of the output hole and affecting the subsequent assembly and use of the active crank arm. The tooling for processing the crank arm in the high-voltage switch provided in Embodiment 1 of this utility model limits the crank arm 0 in the horizontal direction through the first limiting pin 2 and the second limiting pin 3, and limits the crank arm 0 in the vertical direction through the pressure plate 44 and the components that fix the pressure plate 44, thereby achieving stable fixing of the crank arm 0 on the disc base 1. When the disc base 1 is fixed to the machine tool spindle, the crank arm 0 is kept in a stable state during the processing.

[0034] like Figure 1 As shown in Embodiment 1 of this utility model, the tooling for machining the crank arm in a high-voltage switch preferably has a boss 230 at the bottom end of both the first limiting pin 2 and the second limiting pin 3. When the crank arm 0 is fixedly installed on the tooling, the crank arm 0 contacts the boss 230, and the crank arm 0 is raised by the boss 230. A gap is generated between the crank arm 0 and the disc base 1. This gap can ensure that the tool avoids damaging the disc base 1 when grinding the output hole, thereby extending the service life of the tooling.

[0035] like Figure 1 As shown, the tooling for processing the crank arm in a high-voltage switch provided in Embodiment 1 of this utility model preferably includes a positioning component 5. Since the first positioning pin 2 needs to be in close contact with the first connecting hole 01 and the second positioning pin 3 needs to be in close contact with the second connecting hole 02, it is difficult for the first connecting hole 01 to pass through, and the second connecting hole 02 to pass through. To facilitate the installation of the crank arm 0 onto the tooling, a positioning groove 5 is specifically included. A first positioning groove 51 is provided on the positioning component 5. The first positioning groove 51 is located between the first limiting pin 2 and the second limiting pin 3, and the opening of the first positioning groove 51 faces the center of the disc base 1. When the crank arm 0 is fixedly installed on the tooling, due to the crank arm 0's... The four curved edges are all different. The fourth curved edge 008 of the crank arm 0 is attached to the first positioning groove 51, so that the placement direction and position of the crank arm 0 can be determined. When the crank arm 0 is in this position, the first connecting hole 01 is exactly above the first positioning pin 2, and the second connecting hole 02 is exactly above the second positioning pin 3, thus forming an effective positioning and saving the time required for the installer to find the position and angle alignment. Furthermore, the first positioning groove 51 extends vertically to the edge of the clamping part 4. If the fourth curved edge 008 is attached to the first positioning groove 51, the installer can slide along the first positioning groove 51 in the vertical direction for loading and unloading, thus realizing convenient installation of the crank arm 0 onto the tooling.

[0036] like Figure 2As shown, the tooling for machining the crank arm in a high-voltage switch provided in Embodiment 1 of this utility model preferably utilizes a design where the sleeve 42 can rotate, and the fixing bolt 45 can only exert vertical pressure on the pressure plate 44, making it impossible to guarantee whether the pressure plate 44 will rotate. When the machine tool spindle rotates, the high speed may cause the pressure plate 44 to rotate, causing the crank arm 0 to lose the pressure of the pressure plate 44 and thus failing to form an effective fixation. Therefore, the end of the pressure plate 44 closest to the center of the disc base 1 is designated as the front end of the pressure plate 44, and a second positioning groove 442 is provided on the front end surface of the pressure plate 44. 42 extends downward to the bottom of the pressure plate 44, allowing the crank arm 0 to contact the second positioning groove 442. When the crank arm 0 is fixedly installed on the tooling, the second arc edge 006 of the crank arm 0 is in contact with the second positioning groove 442. Since the crank arm 0 is limited by the first positioning pin 2 and the second positioning pin 3, the crank arm 0 cannot rotate or shift. The pressure plate 44 is rotated and limited by the second positioning groove 442. Furthermore, by cooperating with the second arc edge 006, the orientation of the pressure plate 44 can be quickly adjusted, thereby saving the time required for the installer to install the crank arm 0 onto the tooling.

[0037] In summary, the tooling provided by this utility model for machining crank arms in high-voltage switches can solve the problem that when machining output holes in the prior art, if the active crank arm is not fixed securely, the machining equipment may deviate from the required machining position of the active crank arm, which will cause deviations in the accuracy of the output hole and thus affect the subsequent assembly and use of the active crank arm; thus, it can ensure that the crank arm is in a stable state during the machining process.

[0038] Those skilled in the art should understand that variations can be implemented by combining existing technology and the above embodiments, and will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0039] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of this utility model, or equivalent embodiments with equivalent changes, do not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model, shall still fall within the protection scope of the technical solution of this utility model.

Claims

1. A tooling for machining a bell crank in a high voltage switch, characterized in that, It includes a disc base, a first limiting pin, a second limiting pin, and a clamping element; if the disc base is horizontally positioned, the first limiting pin and the second limiting pin are fixed to the upper surface of the disc base; the first limiting pin and the second limiting pin are respectively located on both sides of the center of the disc base; The clamping component includes a stud, a sleeve, a spring, a pressure plate, and a fixing bolt; the stud is fixed to the upper surface of the disc base; the sleeve is sleeved on the outside of the stud; the spring is sleeved on the outside of the stud; the sleeve is located above the spring; the pressure plate is horizontally arranged and fixed to the top of the sleeve; the pressure plate has a through hole for the fixing bolt to pass through; the guide portion of the fixing bolt passes through the through hole and is fixed in the threaded hole of the stud; When the crank arm is fixedly installed on the tooling, the first limiting pin is sleeved in the first connecting hole, the second limiting pin is sleeved in the second connecting hole, the fixing bolt is tightened in the stud, the sleeve compresses the spring, and the pressure plate presses the crank arm tightly onto the disc base.

2. The tooling for machining a hinged arm in a high voltage switch as claimed in claim 1, characterized in that, Both the first limiting pin and the second limiting pin have a boss at their bottom ends.

3. The tooling for machining a hinged arm in a high voltage switch as claimed in claim 2, characterized in that, It also includes a positioning component; the positioning component has a first positioning groove; the first positioning groove is located between the first limiting pin and the second limiting pin; the opening of the first positioning groove faces the center of the disc base; the first positioning groove extends vertically to the edge of the clamping component; When the crank arm is fixedly installed on the tooling, the fourth arc edge of the crank arm is in contact with the first positioning groove.

4. The tooling for machining a hinged arm in a high voltage switch as claimed in claim 3, characterized in that, The end of the pressure plate closest to the center of the disc base is designated as the front end of the pressure plate, and a second positioning groove is formed on the front end surface of the pressure plate; the second positioning groove extends downward to the bottom of the pressure plate; When the crank arm is fixedly installed on the tooling, the second arc edge of the crank arm is in contact with the second positioning groove.

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