A gasket flanging tool

Abstract

The utility model relates to motor terminal block terminal, concretely relates to a gasket flanging tool, including with the sleeve of the outer end of terminal plug -in cooperation, the barrel mouth of sleeve is arranged downward and is provided with the connecting arm of radial outward extension in the upper end, the vertically hanging shape's swing bar is hinged and connected on the connecting arm and swing bar is arranged with the outer circumferential surface of sleeve interval, the lower end of swing bar has hook flat shovel. Utilize sleeve and the outer end of terminal plug -in cooperation, the effective positioning of whole frock, swing bar is placed between the inherent enclosure wall of terminal and terminal block bottom plate with the attitude of vertically hanging, through the swing of swing bar to the side of sleeve, the hook flat shovel of swing bar lower end can insert below the stop gasket of waiting for flanging and will wait for gasket's outer circle side upward pry, implement gasket flanging operation, whole operation process whether sleeve or swing bar, all will not have the interference with enclosure wall.

Description

Technical Field

[0001] This utility model relates to the wiring terminals of motor junction boxes, specifically to a gasket flanging fixture. Background Technology

[0002] The explosion-proof motor junction box mainly consists of a box body, a cover, and wiring terminals, such as... Figure 1 , 2 As shown, the junction box base plate 1 has mounting holes for the terminal block 2 to pass through. The terminal block 2 includes a connecting sleeve 2a, an insulating sleeve 2b, and a terminal post 2c, which are sequentially fitted from the outside in. The connecting sleeve 2a is inserted into the mounting hole on the junction box base plate 1 and threadedly connected to it, thereby achieving the installation and fixation between the terminal block 2 and the junction box base plate 1. In order to prevent the terminal block 2 from loosening and falling off from the junction box base plate 1, the outer end of the connecting sleeve 2 is generally provided with a ring-shaped hexagonal head 2a1. A stop washer 3 is added between the hexagonal head 2a1 and the junction box base plate 1. By rotating the connecting sleeve 2a, the hexagonal head 2a1, the stop washer 3, and the junction box base plate 1 are axially pressed together, and the friction between them is used to suppress the rotation and loosening of the connecting sleeve 2a.

[0003] In practical use, since the terminal block 2 is a precision-machined part, the side of the hexagonal head 2a1 facing the stop washer 3 is relatively smooth. The friction between the hexagonal head 2a1 and the stop washer 3 is relatively small compared to the friction between the stop washer 3 and the box bottom plate 1. The possibility of relative sliding between the hexagonal head 2a1 and the stop washer 3, which could lead to the loosening of the connecting sleeve 2a, is also relatively high. Therefore, a flat chisel is usually used to apply torque to the stop washer 3, so that the stop washer 3 forms a flange that fits against the straight edge of the outer peripheral surface of the hexagonal head 2a1, in order to restrict the relative rotation between the hexagonal head 2a1 and the stop washer 3.

[0004] In the above technical solution, because the back of the retaining washer 3 is tightly arranged with the junction box base plate, it is very difficult for the blade of the flat spade to insert into the gap between the back of the retaining washer 3 and the junction box base plate 1. Therefore, on the same day, the applicant filed a patent application entitled "Terminal Gasket Anti-Loosening Structure and Gasket Flanging Fixture", which discloses a terminal gasket anti-loosening structure, such as... Figure 3 As shown, the outer end of the connecting sleeve is provided with a radially outward protruding ring. Annular first and second stop washers are fitted onto the tube of the connecting sleeve located between the ring and the junction box base plate. The first stop washer is located between the second stop washer and the junction box base plate. The ring, first stop washer, second stop washer, and junction box base plate are axially pressed together. The outer edge of the second stop washer has a flange extending towards the side of the ring. The sum of the flange's extension length and the outer diameter of the second stop washer is greater than the outer diameter of the first stop washer. This creates an annular groove below the second stop washer to be flanged, facilitating the insertion of a flat spatula. However, in a motor junction box, such as... Figure 1As shown, the bottom plate 1 of the box is usually provided with a wall 4 surrounding the terminal 2. The space between the terminal 2 and the wall 4 is narrow. When using a traditional chisel or flat chisel to fold the second stop washer, it will interfere with the protruding wall 4, thus making it impossible to fold the stop washer 3. Summary of the Invention

[0005] This utility model provides a gasket flanging fixture. When flanging the stop gasket, the fixture will not interfere with the enclosure on the bottom plate of the junction box, which facilitates the gasket flanging operation on the terminal block.

[0006] To achieve the above objectives, the technical solution adopted is as follows: a gasket flanging fixture, including a sleeve that is inserted into the outer end of a terminal block. The sleeve has its opening facing downwards and a connecting arm extending radially outwards at its upper end. A pendant-shaped rocker arm is hinged to the connecting arm and is spaced apart from the outer circumferential surface of the sleeve. The lower end of the rocker arm has a hook-shaped flat chisel. The cutting edge of the hook-shaped flat chisel is located on the side of the chisel body adjacent to the sleeve, and the thickness of the cutting edge is less than the thickness of the first stop washer. When the lower opening of the sleeve is inserted into the terminal block, the second stop washer is located outside the sleeve cavity, and a space is left at the opening of the sleeve for flanging insertion.

[0007] Compared with the prior art, the technical effect of this utility model is as follows: by using the sleeve and the outer end of the terminal block to fit together, the entire tooling is effectively positioned. The swing rod is placed in a hanging position between the terminal block and the inherent wall on the bottom plate of the junction box. By controlling the swing rod to swing to the side where the sleeve is located, the hook-shaped flat shovel at the lower end of the swing rod can be inserted under the stop washer to be turned and pry the outer edge of the washer upward to carry out the washer turning operation. In the entire operation process, neither the sleeve nor the swing rod will interfere with the wall. In the narrow space between the wall and the terminal block, not only can the turning operation of the stop washer be effectively carried out, but it is also very convenient to operate. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the assembly of wiring terminals and junction boxes in the prior art;

[0009] Figure 2 This is a schematic diagram of a wiring terminal block in the prior art;

[0010] Figure 3 Schematic diagram of the anti-loosening structure for terminal blocks;

[0011] Figure 4 This is a schematic diagram of the usage state of this utility model;

[0012] Figure 5 A schematic diagram showing the usage state of the first embodiment of the gasket flanging fixture;

[0013] Figure 6 This is a schematic diagram of the first embodiment of the gasket flanging fixture;

[0014] Figure 7 A schematic diagram of the sleeve opening end face in the first embodiment of the gasket flange tooling;

[0015] Figure 8 A schematic diagram showing the usage state of the second embodiment of the gasket flanging fixture;

[0016] Figure 9 This is a schematic diagram of the second embodiment of the gasket flanging fixture;

[0017] Figure 10 A schematic diagram of the sleeve opening end face in the second embodiment of the gasket flange tooling;

[0018] Figure 11 This is a schematic diagram of a hook-shaped flat shovel structure. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-11 The present invention will be further described in detail below, including related content:

[0020] A gasket flanging fixture includes a sleeve 10 that is inserted into the outer end of a terminal A. The sleeve 10 has its opening facing downwards and a connecting arm 20 extending radially outwards at its upper end. A pendant-shaped rocker arm 30 is hinged to the connecting arm 20 and is spaced apart from the outer circumferential surface of the sleeve 10. The lower end of the rocker arm 30 has a hook-shaped flat chisel 31. The blade 311 of the hook-shaped flat chisel 31 is located on the side of the chisel body adjacent to the sleeve 10, and the thickness of the blade 311 is less than the thickness of the first stop gasket B1. When the lower opening of the sleeve 10 is inserted into the terminal A, the second stop gasket B2 is located outside the cavity of the sleeve 10, and a space is left at the opening of the sleeve 10 for flanging insertion.

[0021] It should be noted that the applicant submitted a document on the same day entitled "Terminal Gasket Anti-Loosening Structure and Gasket Flanging Fixture," in which the disclosed terminal gasket anti-loosening structure is as follows: Figure 3 As shown, the connecting sleeve between the connecting sleeve convex ring A1 and the junction box base plate C has annular first stop washer B1 and second stop washer B2 fitted on its tube. The first stop washer B1 is located between the second stop washer B2 and the junction box base plate C. The connecting sleeve convex ring A1, the first stop washer B1, the second stop washer B2 and the junction box base plate C are axially pressed together. The outer diameter of the second stop washer B2 is larger than the outer diameter of the first stop washer B1, thus forming an annular groove between the second stop washer B2 to be flipped and the junction box base plate C.

[0022] In the above situation, when performing the flanging operation on the second stop washer B2, this solution first inserts the lower end of the sleeve 10 onto the outer end of the terminal A, such as... Figure 4 As shown, this allows for effective positioning of the entire fixture. The swing arm 30 is positioned vertically between the terminal A and the inherent enclosure on the junction box base plate C. By controlling the swing arm 30 to swing towards the sleeve 10, the blade 311 of the hook-shaped flat chisel 31 at the lower end of the swing arm 30 can be inserted into the annular groove below the second stop washer B2 to be flanged. Under the swinging motion of the hook-shaped flat chisel 31, the outer edge of the second stop washer B2 can be pried upwards to form a flange. Throughout the entire operation, neither the sleeve 10 nor the swing arm 30 interferes with the inherent enclosure on the junction box base plate C. The narrow space between the enclosure and the terminal A not only allows for effective flangering of the second stop washer B2 but also makes the operation very convenient.

[0023] It should be noted that in the above scheme, the thickness of the blade 311 is less than the thickness of the first stop washer B1. This setting is to ensure that the thickness of the blade 311 meets the requirement of being able to enter the annular groove below the second stop washer B2. If the blade 311 is too thick, it cannot be inserted below the second stop washer B2. In addition, when the lower end of the sleeve 10 is inserted into the terminal A, the second stop washer B2 is located outside the cavity of the sleeve 10, and there is a space at the opening of the sleeve 10 for the flange to be inserted. The space is set so that the flange subsequently formed on the second stop washer B2 will not interfere with the body of the sleeve 10, thereby ensuring that the flange can abut against the outer circumferential surface of the connecting sleeve ring A1.

[0024] Furthermore, combined Figure 11 As shown, the bottom back surface 312 of the hook-shaped flat shovel 31 is arranged at an angle with the top surface 313 on the opposite side to form a wedge-shaped shovel head. The cutting edge 311 is formed at the intersection of the back surface 312 and the top surface 313. When the hook-shaped flat shovel 31 swings toward the side where the sleeve 10 is located, the cutting edge 311 of the hook-shaped flat shovel 31 will insert into the annular groove below the second stop washer B2. Then, by the upward swinging motion of the cutting edge 311 and the pushing of the top surface 313 against the outer edge of the second stop washer B2, the outer edge of the second stop washer B2 is folded upward to form a flange that abuts against the outer peripheral surface of the connecting sleeve protrusion A1.

[0025] The angle between the back surface 312 and the top surface 313 of the shovel should ideally be between 40° and 50°. This ensures that the top surface 313 of the shovel can contact the second stop pad B2 when the shovel blade 311 is initially swinging at a small angle with the swing arm 30. When the swing arm 30 continues to swing, the edge of the second stop pad B2 can be quickly pried up and folded over. This also ensures the strength of the hook-shaped flat shovel 31 itself. In addition, it should be noted that the distance that the top surface 313 extends away from the shovel blade 311 should match the width of the flange, or in other words, the distance that the top surface 313 extends away from the shovel blade 311 should be slightly greater than the width of the flange, to ensure that the edge of the second stop pad B2 is folded into a flange.

[0026] Furthermore, to avoid motion interference between the hook-shaped flat shovel 31 and the junction box bottom plate C when the swing arm 30 swings, in this solution, when the sleeve 10 is inserted into the outer end of the terminal A, the swing path of the shovel blade 311 is located at a position that avoids the junction box bottom plate C, and the radius of curvature of the swing path of the bottom shovel back 312 is less than or equal to the radius of curvature of the swing path of the shovel blade 311.

[0027] In addition, during the process of the blade 311 swinging from the low position to the high position of the sleeve 10, when the blade 311 is in the low position, the height difference between the blade 311 and the upper plate of the junction box bottom plate C is less than the thickness of the first stop washer B1. This avoids the blade 311 being higher than the annular groove below the second stop washer B2 due to an excessive height difference between the blade 311 and the upper plate of the junction box bottom plate C, thus ensuring that the blade 311 can be inserted into the annular groove below the second stop washer B2.

[0028] It should be noted that the blade 311 is formed by the intersection of the back surface 312 and the top surface 313 of the blade, which is actually an edge line with almost zero thickness. Therefore, the thickness of the blade 311 can be ignored here.

[0029] As a preferred embodiment, the shape of the lower end of the sleeve 10 matches the shape and size of the connecting sleeve protrusion A1 at the outer end of the terminal A. In this embodiment, the lower end of the sleeve 10 can be fitted onto the connecting sleeve protrusion A1, and the matching shape and size of the two can improve the relative stability after the sleeve 10 and the terminal A are inserted and mated.

[0030] To avoid interference between the flange formed on the second stop washer B2 and the sleeve 10, which would prevent the flange from abutting against the outer circumferential surface of the connecting sleeve ring A1, this solution provides the following two design schemes, which are essentially design schemes for the space at the opening of the sleeve 10 for inserting the flange:

[0031] Firstly, combining Figure 5-7As shown, a notch 12 extending upward along the cylinder wall is provided on the end face of the sleeve 10. The notch 12 is arranged on the side of the sleeve 10 near the hook-shaped flat shovel 31 and the notch 12 and the hook-shaped flat shovel 31 are arranged opposite to each other in the radial direction of the sleeve 10.

[0032] In this design, after the opening of the sleeve 10 is fitted onto the connecting sleeve convex ring A1, when the hook-shaped flat spatula 31 prys the outer edge of the second stop washer B2, the flange formed on the second stop washer B2 will be inserted into the notch 12, which is opposite to the hook-shaped flat spatula 31 and extends upward along the sleeve wall, because the opening of the sleeve 10 has a notch 12 that is opposite to the hook-shaped flat spatula 31 and extends upward along the sleeve wall. This allows the flange to effectively abut against the outer circumferential surface of the connecting sleeve convex ring A1 without being blocked by the sleeve wall. At the same time, it will not have a significant impact on the insertion stability between the sleeve 10 and the connecting sleeve convex ring A1.

[0033] Secondly, in combination Figure 8-10 As shown, the lower end of the sleeve 10 has a stepped opening with a smaller inner diameter and a larger outer diameter. The distance between the stepped surface 11 and the lower end face of the sleeve opening is less than the thickness of the connecting sleeve convex ring A1.

[0034] In this design, the lower end of the sleeve 10 is stepped. After the sleeve 10 is placed on the connecting sleeve ring A1, the stepped surface 11 abuts against the upper surface of the connecting sleeve ring A1. A gap exists between the lower surface of the sleeve 10's opening and the second stop washer B2 located below the connecting sleeve ring A1. This allows the flange subsequently formed on the second stop washer B2 to fit within this gap, with the flange positioned below the lower surface of the sleeve 10's opening without interfering with the sleeve 10's wall. The distance between the stepped surface 11 and the lower surface of the opening needs to be specifically considered based on the thickness of the connecting sleeve ring A1 and the height of the flange.

[0035] As a preferred option, in order to facilitate the assembly and disassembly of the connecting arm 20 and the sleeve 10, the end of the connecting arm 20 away from the swing rod 30 is connected to the upper end of the sleeve 10 by bolt 40.

[0036] As a preferred embodiment, the middle section of the swing arm 30 is hinged via a hinge shaft 21, with the shaft axis of the hinge shaft 21 oriented horizontally and perpendicular to the connecting arm 20. In this embodiment, the swing arm 30 has a section above the hinge shaft 21. During the flanging operation, the hook-shaped flat shovel 31 at the lower end of the swing arm 30 can be swung by pushing and pulling the upper section of the swing arm 30. The upper section of the swing arm 30 can be appropriately extended to increase the lever arm, making the operation more labor-saving.

[0037] Furthermore, a pressure rod 32 is connected to the upper end of the swing arm 30. The length of the pressure rod 32 is perpendicular to the axis of the hinge shaft 21, and the pressure rod 32 extends outward from the sleeve 10. In this design, by connecting the pressure rod 32 to the upper end of the swing arm 30, the lever arm is extended. During use, the hook-shaped flat shovel 31 at the lower end of the swing arm 30 can be controlled to swing by pressing down or raising the pressure rod 32.

[0038] Finally, it should be noted that in the prior art, the connecting sleeve convex ring A1 is generally a hexagonal head in the shape of a ring. This application has not changed its shape, so the shape of the connecting sleeve convex ring A1 has not been described in detail. Secondly, regarding the technical idea of ​​using the flange to abut against the outer circumferential surface of the connecting sleeve convex ring A1 to limit the rotational loosening of the connecting sleeve, the flange does not need to be completely attached to the outer circumferential surface of the connecting sleeve convex ring A1. As long as the second stop washer B2 is folded upward at a certain angle with the lower outer edge of the connecting sleeve convex ring A1 as the folding edge, the relative rotation between the washer and the connecting sleeve convex ring A1 can be limited. This is because the radius of the corner of the hexagonal head is larger than the radius of the straight edge.

Claims

1. A gasket flanging fixture, characterized in that: The sleeve (10) is inserted into the outer end of the terminal (A). The sleeve (10) is arranged with its opening facing downward and has a connecting arm (20) extending radially outward at its upper end. A pendant-shaped swing rod (30) is hinged to the connecting arm (20) and is spaced apart from the outer circumferential surface of the sleeve (10). The lower end of the swing rod (30) has a hook-shaped flat shovel (31). The blade (311) of the hook-shaped flat shovel (31) is located on the side of the shovel body near the sleeve (10) and the thickness of the blade (311) is less than the thickness of the first stop washer (B1). When the lower end of the sleeve (10) is inserted into the terminal (A), the second stop washer (B2) is located outside the cavity of the sleeve (10) and there is a space left at the opening of the sleeve (10) for the flange to be inserted.

2. The gasket flanging fixture according to claim 1, characterized in that: The bottom back (312) of the hook-shaped flat shovel (31) is arranged at an angle with the top surface (313) of the shovel on the opposite side and forms a wedge-shaped shovel head. The shovel blade (311) is formed at the intersection of the back (312) and the top surface (313).

3. The gasket flanging fixture according to claim 2, characterized in that: When the sleeve (10) is inserted into the outer end of the terminal (A), the swing path of the blade (311) is in a position that avoids the junction box bottom plate (C), and the radius of curvature of the swing path of the bottom back of the blade (312) is less than or equal to the radius of curvature of the swing path of the blade (311).

4. The gasket flanging fixture according to claim 3, characterized in that: When the blade (311) is in a low position, the height difference between the blade (311) and the upper surface of the junction box base plate (C) is less than the thickness of the first stop washer (B1).

5. The gasket flanging fixture according to claim 1, characterized in that: The shape of the lower end of the sleeve (10) matches the shape and size of the connecting sleeve protrusion (A1) at the outer end of the terminal (A).

6. The gasket flanging fixture according to claim 5, characterized in that: The sleeve (10) has a notch (12) extending upward along the sleeve wall on the end face of the sleeve opening. The notch (12) is arranged on the side of the sleeve (10) near the hook-shaped flat shovel (31) and the notch (12) and the hook-shaped flat shovel (31) are arranged opposite to each other in the radial direction of the sleeve (10).

7. The gasket flanging fixture according to claim 5, characterized in that: The lower end of the sleeve (10) is a stepped opening with a small inner diameter and a large outer diameter. The distance between the stepped surface (11) of the stepped opening and the lower end face of the opening is less than the thickness of the connecting sleeve convex ring (A1).

8. The gasket flanging fixture according to claim 1, characterized in that: The end of the connecting arm (20) away from the swing arm (30) is connected to the upper end of the sleeve (10) by a bolt (40).

9. The gasket flanging fixture according to claim 1, characterized in that: The middle part of the swing arm (30) is hinged to the hinge shaft (21), the axis of the hinge shaft (21) is horizontal and the hinge shaft (21) is perpendicular to the connecting arm (20).

10. The gasket flanging fixture according to claim 9, characterized in that: The upper end of the swing arm (30) is connected to a pressure rod (32). The length of the pressure rod (32) is perpendicular to the axis of the hinge shaft (21), and the pressure rod (32) extends outward from the sleeve (10).

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