Valve rod assembly with endless sensor and piston pinning tool

Abstract

The utility model relates to a kind of poleless sensing valve ejector rod assembly and piston riveting pin tool, including bottom plate, V-shaped base and piston positioning seat, its technical key points are: the positioning shoulder corresponding to the outer edge of piston is equipped in piston positioning seat, the center line of the piston supported in piston positioning seat coincides with the center line of ejector rod assembly, tool another including the variable-diameter inner rod being passed in piston and with its concentric, the front end of variable-diameter inner rod is equipped with the U-shaped clip opening corresponding to the position of the pinhole of ejector rod assembly, the rear end of variable-diameter inner rod is equipped with the positioning circular table being cooperated with piston, bottom plate another fixed with the air cylinder being concentrically arranged with variable-diameter inner rod, the cylinder rod end of air cylinder points to the rear end face of variable-diameter inner rod.This tool solves the problem that the thin rod position of ejector rod assembly is easy to produce bending when riveting, ensure that elastic pin is riveted into correct position, save time and effort.

Description

Technical Field

[0001] This utility model relates to the technical field of tooling for stepless sensor valves, specifically to a tooling for a push rod assembly and piston riveting pin of a stepless sensor valve, applicable to WG-1G(C) type stepless sensor valves. Background Technology

[0002] Currently, the assembly of the push rod and the piston riveting of the WG-1G(C) type stepless sensor valve is a critical and troublesome step in the assembly process. Before riveting, the end of the push rod assembly with the φ3 hole needs to be inserted into the piston. By rotating the push rod assembly, the end face of the φ3 hole is aligned with the empty groove on the piston surface. Then, the riveting operation is performed using a riveting punch. During riveting, the V-shaped fixing base can be used to bear the force on the thick rod part of the push rod assembly outside the piston.

[0003] However, the following problems exist during operation: the gap between the inner peripheral wall of the piston and the outer peripheral wall of the push rod assembly with the φ3 hole is large. The inner peripheral wall of the piston cannot serve as a support surface for the thin rod position where the φ3 hole is located. Due to the lack of a support surface, the thin rod position of the push rod assembly is prone to bending, and the elastic pin position is not easy to rivet. Therefore, the rivet operation is time-consuming and laborious. Utility Model Content

[0004] The purpose of this invention is to provide a reasonably structured and reliable stepless sensor valve push rod assembly and piston riveting fixture, which solves the problem that the thin rod of the push rod assembly is prone to bending during riveting, ensuring that the elastic pin is riveted into the correct position, saving time and effort.

[0005] The technical solution of this utility model is: A stepless sensor valve push rod assembly and piston riveting fixture includes a base plate, a V-shaped base disposed above the base plate for supporting the push rod assembly, and a piston positioning seat spaced apart from the V-shaped base. The key technical features are: the piston positioning seat has a positioning shoulder corresponding to the outer edge of the piston; the centerline of the piston supported within the piston positioning seat coincides with the centerline of the push rod assembly; the fixture further includes a variable-diameter inner rod passing through and concentrically disposed within the piston; the front end of the variable-diameter inner rod has a U-shaped clamp corresponding to the pin hole of the push rod assembly; the rear end of the variable-diameter inner rod has a positioning frustum that mates with the piston; and a cylinder concentrically disposed on the base plate, with the cylinder rod end pointing towards the rear end face of the variable-diameter inner rod.

[0006] The aforementioned stepless sensor valve push rod assembly and piston riveting fixture have a horizontal limiting block at the rear of the V-shaped base.

[0007] The aforementioned stepless sensor valve push rod assembly and piston riveting fixture have the main body of the variable diameter inner rod closely attached to the inner wall of the piston, and the rear end of the inner wall of the piston is provided with a positioning cavity that mates with the positioning frustum.

[0008] The beneficial effects of this utility model are: The cylinder pushes the variable-diameter inner rod, causing its U-shaped clamp at the front end to hold the pin hole on both sides of the push rod assembly. At the same time, the bottom surface of the U-shaped clamp is in close contact with the front surface of the pin hole. The cylinder's thrust prevents the thin rod of the push rod assembly from bending during riveting, ensuring that the elastic pin is riveted into the correct position, saving time and effort. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a diagram showing the working state of this utility model; Figure 3 This is a schematic diagram of the piston structure; Figure 4 This is a structural schematic diagram of the pushrod assembly.

[0010] In the diagram: 1. Cylinder, 2. Variable diameter inner rod, 3. Piston, 4. Push rod spring, 5. Position, 6. Push rod assembly, 7. Horizontal limit block, 8. V-shaped base, 9. Base plate, 10. Hole, 11. U-shaped clamp, 12. Piston positioning seat, 13. Pin hole, 14. Positioning frustum. Detailed Implementation

[0011] The present invention will be described in detail with reference to the accompanying drawings.

[0012] like Figures 1-4 As shown, the stepless sensor valve push rod assembly and piston riveting fixture include a base plate 9, a V-shaped base 8 located above the base plate 9 for supporting the push rod assembly 6, and piston positioning seats 12 spaced apart from the V-shaped base 8. A horizontal limiting block 7 is provided at the rear of the V-shaped base 8.

[0013] The piston positioning seat 12 has a positioning shoulder corresponding to the outer edge of the piston 3 for axial positioning. The centerline of the piston 3 supported in the piston positioning seat 12 coincides with the centerline of the push rod assembly 6.

[0014] The tooling further includes a variable-diameter inner rod 2 that passes through and is concentric with the piston 3. The front end of the variable-diameter inner rod 2 is provided with a U-shaped clamp 11 corresponding to the pin hole 13 of the push rod assembly 6, and the rear end of the variable-diameter inner rod 2 is provided with a positioning frustum 14 that mates with the piston 3. The main body of the variable-diameter inner rod 2 is in close contact with the inner wall of the piston 3, and the rear end of the inner wall of the piston 3 is provided with a positioning cavity that mates with the positioning frustum 14.

[0015] A cylinder 1, which is concentrically arranged with the variable diameter inner rod 2, is fixed on the base plate 9. The end of the cylinder rod of the cylinder 1 points to the rear end face of the variable diameter inner rod 2.

[0016] Working principle: Insert the variable-diameter inner rod 2 into the piston 3 from the large-diameter end of the piston 3. Insert the end of the push rod assembly 6 with the φ3 hole through the push rod spring 4 into the small-diameter end of the piston 3. Rotate the push rod assembly 6 so that the φ3 pin hole 13 aligns with the empty groove 10 on the surface of the piston 3. Place the piston 3 and the push rod assembly 6 on the piston positioning seat 12 and the V-shaped base 8 respectively, with the φ3 pin hole 13 and the empty groove 10 on the surface of the piston 3 both facing upwards. The push rod assembly 6 rests against the horizontal limiting block 7.

[0017] When cylinder 1 is activated, the inner rod extends and presses against the variable-diameter inner rod 2, pushing the variable-diameter inner rod 2 and piston 3 to move axially. Piston positioning seat 12 uses a positioning shoulder to horizontally limit piston 3. The U-shaped clamp 11 at the front end of the variable-diameter inner rod 2 is tightly connected to the pin hole 13 of the push rod assembly 6 at position 5. Specifically, the U-shaped clamp 11 clamps both sides of the pin hole 13 of the push rod assembly, while the bottom surface of the U-shaped clamp 11 is tightly connected to the front surface of the pin hole 13, allowing the thrust of cylinder 1 to be transmitted to the push rod assembly, preventing displacement and bending during riveting. At this time, the positioning cavity of piston 3 is connected to the positioning frustum 14 of the variable-diameter inner rod 2, and the thrust of cylinder 1 is also transmitted to piston 3, preventing circumferential displacement of piston 3.

[0018] The riveting punch is inserted into the elastic cylindrical pin, and riveting is performed at the φ3 pin hole 13. After riveting is completed, the riveting punch is lowered, the cylinder is reset, and the variable diameter inner rod 14 is removed for the next riveting process.

[0019] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this utility model.

Claims

1. A stepless sensor valve push rod assembly and piston riveting fixture, comprising a base plate, a V-shaped base disposed above the base plate for supporting the push rod assembly, and a piston positioning seat spaced apart from the V-shaped base, characterized in that: The piston positioning seat has a positioning shoulder corresponding to the outer edge of the piston. The center line of the piston supported in the piston positioning seat coincides with the center line of the push rod assembly. The tooling also includes a variable diameter inner rod that passes through the piston and is concentric with it. The front end of the variable diameter inner rod has a U-shaped clamp corresponding to the pin hole of the push rod assembly. The rear end of the variable diameter inner rod has a positioning frustum that cooperates with the piston. A cylinder arranged concentrically with the variable diameter inner rod is fixed on the base plate. The end of the cylinder rod points to the rear end face of the variable diameter inner rod.

2. The stepless sensor valve push rod assembly and piston riveting fixture according to claim 1, characterized in that: The V-shaped base is provided with a horizontal limiting block at the rear.

3. The stepless sensor valve push rod assembly and piston riveting fixture according to claim 1, characterized in that: The main body of the variable-diameter inner rod is in close contact with the inner wall of the piston, and the rear end of the inner wall of the piston is provided with a positioning cavity that mates with the positioning frustum.

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