Assembly tool of load switch tripping mechanism

Abstract

The utility model discloses an assembly tool for a load switch tripping mechanism, and the assembly tool comprises a pedestal, the pedestal is provided with supporting plates at intervals, a rotating shaft is embedded into the supporting plates, the supporting plates located at the outer side are in embedded fit with a step surface, each supporting plate is attached to a corresponding crank arm, and the rotating shaft is inserted into the corresponding crank arm. And each support plate is also provided with a positioning pin for positioning the crank arm and the step surface at an included angle. The outer side of each positioning pin is sleeved with a centering cylinder in a threaded mode, and one side of the end face of each centering cylinder is of a conical surface structure capable of being embedded into a gap between the corresponding positioning pin and the corresponding penetrating hole. The assembling tool can accurately assemble and position the crank arm and the rotating shaft which are axially and relatively positioned and have relative included angles in the circumferential direction, and solves the problems that in the current manual assembling process, as the crank arm and the rotating shaft cannot be completely fixed, the matching hole has deviation, the three-phase crank arm is inconsistent, the tripping function of a certain phase fails and rework is caused, and the assembling efficiency is high. And the assembly efficiency is low.

Description

Technical Field

[0001] The present application relates to the technical field of load switches, and in particular to an assembly tool for a load switch tripping mechanism. Background Art

[0002] In the high-voltage switchgear industry, vacuum load switch-fuse combination devices (hereinafter referred to as combination devices) with fuses can divide short-circuit current for short-circuit protection. This product features a tripping mechanism, and the fuses are equipped with strikers. When an overload or short-circuit current flows through them, the fuse blows, and the striker strikes the tripping device, automatically tripping the load switch and preventing phase loss.

[0003] The working principle of the tripping mechanism is: when the fuse blows, the striker strikes the tripping plate, causing the crank arm connected to it to drive the rotating shaft to rotate (the overall structure diagram of the crank arm and the rotating shaft is shown in the figure). Figure 1-2 , 5), so that the load switch is tripped. Since the load switch has a three-phase fuse, the load switch must be tripped when each phase fuse is blown. Therefore, three crank arms are usually installed on the rotating shaft, and the rotation of each crank arm can achieve tripping. The three-phase crank arm is fixed to the rotating shaft by adjusting the position and angle, matching holes, and then fixing with expansion pins. There are step surfaces on both sides of the rotating shaft for assembly, that is, the center line of the crank arm and the step surface of the rotating shaft have a specific angle, such as Figure 5 shown.

[0004] Currently, when assembling the crank arm and the rotating shaft, the crank arm is marked at the rotating shaft position, and then the hole is drilled and the expansion pin is inserted. Because the crank arm and the shaft are not completely fixed during the hole matching, the hole matching is misaligned, resulting in inconsistent three-phase crank arms, causing the tripping function of one phase to fail, requiring rework, and reducing assembly efficiency. Summary of the Invention

[0005] In response to the above-mentioned problems, the present application aims to provide an assembly tool for a load switch tripping mechanism, which solves the current problems of manual assembly, such as the inability to completely fix the crank arm and the rotating shaft, resulting in deviation in the matching holes, failure of the tripping function of a certain phase, and rework.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in this application is as follows: an assembly tool for a load switch tripping mechanism, wherein the tripping mechanism includes a rotating shaft, on which crank arms are sleeved at unequal intervals, and both ends of the rotating shaft are provided with stepped surfaces parallel to the axis, wherein the center line of the crank arm forms a certain angle with the vertical line of the step surface, and the outer end of the crank arm is provided with a through hole, characterized in that:

[0007] The assembly tooling includes a base, on which support plates for embedding the rotating shaft are arranged at intervals. The support plates located on the outside are embedded in and matched with the step surface, and each of the support plates is attached to the corresponding crank arm. A positioning mechanism is also provided on each support plate for positioning the crank arm and the step surface at an angle.

[0008] Preferably, the positioning mechanism is a positioning pin which is provided on each of the support plates and can be embedded in the through hole.

[0009] Preferably, a centering cylinder is threadedly sleeved on the outer side of each positioning pin, and one side of the end face of the centering cylinder is configured as a conical structure that can be embedded in the gap between the positioning pin and the through hole.

[0010] Preferably, one of the side support plates near the end of the base is configured as a sliding locking structure.

[0011] The beneficial effect of the present application is that the assembly tool can achieve precise assembly positioning of the crank arm and the rotating shaft with axial relative positioning and circumferential relative angle, solving the problem of current manual assembly in which the crank arm and the rotating shaft cannot be completely fixed, resulting in deviation in the matching holes, inconsistency in the three-phase crank arms, failure of the tripping function of a certain phase, rework, and low assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram showing the assembly of the trip mechanism in the load switch.

[0013] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0014] Figure 3 This is a diagram of the rotating shaft structure.

[0015] Figure 4 This is a diagram of the crank arm structure (the upper side is the front view, and the lower side is the top view).

[0016] Figure 5 The diagram shows the angle between the crank arm and the vertical line of the step surface of the rotating axis.

[0017] Figure 6 This is a diagram of the assembly tooling structure of this application (the upper side is the front view, the right side is the left view, and the lower side is the top view).

[0018] Figure 7 This is a diagram showing the assembly of the rotating shaft and crank arm of this application on the assembly tool (the upper side is the front view, the right side is the left view, and the lower side is the top view).

[0019] Figure 8 For this application Figure 7 Enlarged view of the structure at point B in the middle.

[0020] Figure 9 The gap between the positioning pin and the through hole of the crank arm causes the up and down deflection shown in the figure.

[0021] Figure 10 Illustration of the centering cylinder and its assembly process for this application.

[0022] Figure 11 Illustration of the locking process of the support seat slidingly arranged in this application.

[0023] In the figure: 4a-groove; 7-slide rail; 8-locking screw; 9-matching hole. DETAILED DESCRIPTION

[0024] In order to enable ordinary technicians in this field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Refer to the attached Figures 1 to 11 An assembly tool for a load switch tripping mechanism as shown in FIG. Figure 1-5 As shown, the tripping mechanism includes a rotating shaft 1, on which crank arms 2 are sleeved at unequal intervals. Both ends of the rotating shaft 1 are provided with step surfaces 11 parallel to the axis. The step surfaces 11 are used for assembling the rotating shaft 1 in the vacuum load switch. The center line of the crank arm 2 forms a certain angle with the vertical line of the step surface 11. The outer end of the crank arm 2 is provided with a through hole 2a, as shown in FIG. Figure 1 As shown, the through hole 2a is also used for assembling the crank arm 2 and the internal component of the vacuum load switch.

[0026] In order to realize the precise assembly operation of the crank arms 2 with unequal spacing and the crank arms 2 at a specific angle on the rotating shaft 1, the present application provides an assembly tool, such as Figure 6-7 As shown, it includes a base 3, on which support plates 4 are arranged at intervals for embedding and placing the rotating shaft 1 (the support plates 4 are each provided with a groove 4a for embedding and placing the rotating shaft), and the support plates 4 located on the outside are embedded in the step surface 11, that is, the width of the groove provided on the outside support plate 4 is the width between the cross section of the rotating shaft 1 and the step surface 11. Figure 7 As shown, the rotating shaft 1 can be embedded in each support plate 4, and after the step surface 11 is embedded through the support plates 4 on both sides, the circumferential positioning and axial positioning of the rotating shaft 1 can be achieved.

[0027] Each of the support plates 4 is in contact with the corresponding crank arm 2, that is, after the crank arm 2 is sleeved on the rotating shaft 1, the rotating shaft 1 is positioned and embedded in the support plate 4 in the above manner, and then each crank arm 2 is driven to slide on the rotating shaft 1 and in contact with the side wall of the corresponding support plate 4. Through the pre-set position of the support plate 4, the crank arm 2 can be axially positioned on the rotating shaft 1, and the axial assembly position of the crank arm 2 and the rotating shaft 1 can be determined.

[0028] In order to further determine the angle between the crank arm 2 and the vertical line of the step surface 11 of the rotating shaft 1, the present application further provides a positioning mechanism on each support plate 4 for positioning the crank arm 2 and the step surface 11 at an angle. The positioning mechanism is used to rotate the crank arm 2 on the rotating shaft 1 to a designed angle (position) to achieve positioning, thereby completing the angle position of the crank arm 2 on the rotating shaft 1. On the basis of achieving accurate positioning of the crank arm 2 and the rotating shaft 1 in all directions, a matching hole can be made from the crank arm 2 to the rotating shaft 1 ( Figure 8 As shown), the crank arm 2 and the rotating shaft 1 can be precisely positioned and assembled by selecting a pin or the like in the matching hole.

[0029] Specifically, such as Figure 6-7 As shown, the positioning mechanism is a positioning pin 5 provided on each support plate 4 and capable of being inserted into the through-hole 2a. After the rotation axis 1 is assembled on the support plate 4 and each crank arm 2 is abutted against the support plate 4, the crank arm 2 is rotated so that its through-hole 2a is inserted into the positioning pin 5, thereby achieving the designed angle between the crank arm 2 and the rotation axis 1. The base 3 is then assembled on the drilling equipment to perform the hole matching operation.

[0030] When the positioning pin 5 is inserted into the through hole 2a of the crank arm 2, there is a through gap between the positioning pin 5 and the through hole 2a. The through gap may cause the following Figure 9 The crank arm 2 shown in the figure deflects up and down with the rotation axis 1 as the rotation base point. This deflection will cause the angle between the crank arm 2 and the vertical line of the step surface 11 to change, forming an angle error, which will affect the accuracy of the subsequent assembly and operation. Therefore, in order to solve this problem, Figure 10 As shown, each of the positioning pins 5 is threadedly sleeved with a centering cylinder 6 on its outer side, and one end face of the centering cylinder 6 is configured to be embedded in the gap between the positioning pin 5 and the through hole 2a. Figure 10 As shown, after the positioning pin 5 is inserted into the through hole 2a of the crank arm 2, the centering cylinder 6 is then threaded onto the end of the positioning pin 5, and the centering cylinder 6 is continuously tightened so that the conical surface of its outer circumference is embedded in the gap between the through hole 2a of the crank arm 2 and the positioning pin 5, and the outer end of the through hole 2a is gradually in circumferential contact with the conical surface of the centering cylinder 6. After the contact, the through hole 2a and the positioning pin 5 are concentric, thereby eliminating the influence of the assembly gap between the through hole 2a and the positioning pin 5 on the included angle, thereby ensuring the accuracy of the assembly of the crank arm 2 and the rotating shaft 1.

[0031] Similarly, when the rotating shaft 1 is embedded in the support plate 4, there is a gap between the groove of the outer support plate 4 and the step surface 11 of the rotating shaft 1, which facilitates the smooth embedding of the rotating shaft 1. However, this gap will cause axial deviation of the rotating shaft 1, and then the axial position deviation of the crank arm 2 on the rotating shaft 1 will also affect the accuracy of the subsequent assembly and movement. Therefore, in order to solve this problem, Figure 11 As shown, one of the support plates 4 near the end of the base 3 is set as a sliding locking structure. Preferably, the support plate 4 near the outer side of one end of the base 3 is set as a sliding structure (a slide rail 7 is provided at the bottom of the support plate 4). After the rotating shaft 1 is embedded in the groove of the support plate 4, the support plate 4 on this side is driven to slide toward the other side, as shown in FIG. Figure 11 As shown on the right side, the groove of the support plate 4 contacts the stepped surface 11 of the rotating shaft 1, and together with the support plate 4 on the other side, the rotating shaft is axially pressed, thereby eliminating the axial clearance problem that exists when the rotating shaft 1 is inserted into the support plate 4. Preferably, a locking screw 8 is provided on the outer support plate 4. By rotating the locking screw and contacting it with the surface of the base 3, the slidable support plate 4 can be locked.

[0032] The principle of this application is: when the assembly tool of this application is in use, first, multiple crank arms 2 are sleeved on the rotating shaft 1, and then the rotating shaft 1 is positioned and embedded in the groove of the support plate 4, and the step surface 11 of the rotating shaft 1 is embedded in the groove of the support plate 4 located at the outer end of the base 3, and then the support plate 4 on one side is driven to slide on the slide rail and contact the step surface 11 of the rotating shaft 1. By rotating the locking screw to contact the surface of the base 3, the axial positioning of the rotating shaft 1 can be achieved through the support plates 4 on both sides.

[0033] Then, each crank arm 2 is driven to slide on the rotating shaft 1 and fit against the side wall of the corresponding support plate 4. During the fitting process, the through hole 2a of the crank arm 2 is inserted into the positioning pin 5, and then the centering cylinder 6 is threaded onto the end of the positioning pin 5. The centering cylinder 6 is continuously tightened so that the conical surface of its outer circumference is embedded in the gap between the through hole 2a of the crank arm 2 and the positioning pin 5, and the outer end of the through hole 2a is gradually in circumferential contact with the conical surface of the centering cylinder 6, thereby eliminating the influence of the assembly gap between the through hole 2a and the positioning pin 5 on the angle, thereby achieving the designed angle between the crank arm 2 and the rotating shaft 1, and then the base 3 is assembled on the drilling equipment for the hole matching operation.

[0034] The above shows and describes the basic principles, main features and advantages of this application. Without departing from the spirit and scope of this application, this application will also have various changes and improvements, which fall within the scope of this application.

Claims

1. An assembly tool for a load switch tripping mechanism, the tripping mechanism comprising a rotating shaft (1), on which crank arms (2) are sleeved at unequal intervals, both ends of the rotating shaft (1) are provided with step surfaces (11) parallel to the axis, the center line of the crank arm (2) and the vertical line of the step surface (11) form a certain angle, and the outer end of the crank arm (2) is provided with a through hole (2a), characterized in that: The assembly tool comprises a base (3), on which support plates (4) for embedding and placing the rotating shaft (1) are arranged at intervals, the support plates (4) located on the outside are embedded and matched with the step surface (11), and each of the support plates (4) is attached to the corresponding crank arm (2), and a positioning mechanism for positioning the crank arm (2) and the step surface (11) at an angle is also provided on each support plate (4).

2. The assembly tool according to claim 1, characterized in that: The positioning mechanism is a positioning pin (5) which is provided on each support plate (4) and can be embedded in the through hole (2a).

3. The assembly tool according to claim 2, characterized in that: A centering cylinder (6) is threadedly sleeved on the outer side of each positioning pin (5), and one end surface of the centering cylinder (6) is configured as a conical structure that can be embedded in the gap between the positioning pin (5) and the through hole (2a).

4. The assembly tool according to claim 3, characterized in that: One of the side support plates (4) near the end of the base (3) is configured as a sliding locking structure.

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