Tool for interference press fitting of valve seat of electromagnetic valve

Abstract

A tool for interference press fitting of a valve seat of an electromagnetic valve comprises a pressing head, a base is arranged below the pressing head, a sleeve is arranged on the upper end face of the base, a movable positioning cylinder is arranged in a hole of the sleeve in a clearance fit mode, a compression spring is arranged between the lower end of the movable positioning cylinder and the base, and the compression spring is used for enabling the upper end of the movable positioning cylinder to stretch out of the sleeve. A valve seat positioning mandrel is arranged at the upper end of the movable positioning cylinder, a via hole is formed in one side of the wall of the sleeve, a threaded hole is formed in the other side of the wall of the sleeve, a strip-shaped through hole penetrating through the cylinder is formed in the movable positioning cylinder in the radial direction, and the long axis of the strip-shaped through hole extends in the axial direction of the movable positioning cylinder. A limiting bolt sequentially penetrates through the via hole in the wall of the sleeve and the strip-shaped through hole of the movable positioning cylinder and is in threaded connection with the threaded hole in the wall of the sleeve, and the lifting stroke of the movable positioning cylinder is limited. According to the press-fitting tool, the valve seat of the electromagnetic valve can be rapidly positioned, it is guaranteed that the valve seat of the electromagnetic valve does not incline, and the electromagnetic valve is pressed in place.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic valves of automobile shock absorbers, in particular to a tooling for interference-fitting a valve seat of an electromagnetic valve. Background Art

[0002] The solenoid valve is a very important component in the automobile shock absorber. During the manufacturing process of the solenoid valve, according to the assembly requirements of the valve seat and the valve sleeve, the valve seat needs to be pressed into the valve sleeve countersunk platform with interference fit and ensure the size requirements after assembly. At present, the press-fitting method of the solenoid valve is to manually put the valve seat into the valve sleeve, and then put the pressure head on for press-fitting. Although the existing solenoid valve press-fitting tool can assemble the valve seat and the valve sleeve together, it is necessary to manually align the valve seat and the valve sleeve after putting the valve seat into the valve sleeve during processing. In order to ensure that the valve seat does not tilt inside the valve sleeve, it takes a long time of manual work. After the valve seat is manually placed horizontally, the vibration generated by the press during the downward pressing process may cause the valve seat to be tilted by the vibration, resulting in the valve seat not being vertical when pressed into the valve sleeve, resulting in a large pressing force, severe trimming of the valve seat parts after press-fitting, and the valve seat and valve sleeve are deformed and cannot be used, which ultimately leads to unqualified products after press-fitting. Therefore, a press-fitting tool that can position the valve seat of the solenoid valve is needed. Summary of the invention

[0003] The utility model aims to provide a tool for press-fitting the solenoid valve seat with interference fit in view of the corresponding deficiencies of the prior art. The press-fitting tool can realize the rapid positioning of the solenoid valve seat, ensure that the solenoid valve seat does not tilt, and press-fit the solenoid valve in place.

[0004] The purpose of the utility model is achieved by adopting the following scheme: a tool for interference fit of a solenoid valve seat, comprising a pressure head, a base is arranged below the pressure head, a sleeve is arranged on the upper end surface of the base, a movable positioning cylinder is clearance-fitted in the hole of the sleeve, a compression spring is arranged between the lower end of the movable positioning cylinder and the base, the compression spring is used to make the upper end of the movable positioning cylinder extend out of the sleeve, a valve seat positioning core shaft is arranged at the upper end of the movable positioning cylinder, a through hole is arranged on one side of the sleeve wall, and a threaded hole is arranged on the other side, a strip through hole penetrating the cylinder is radially arranged on the movable positioning cylinder, the long axis of the strip through hole extends axially along the movable positioning cylinder, a limit bolt passes through the through hole on the sleeve wall and the strip through hole of the movable positioning cylinder in sequence, and is threadedly connected to the threaded hole on the sleeve wall to limit the lifting stroke of the movable positioning cylinder.

[0005] After the movable positioning cylinder is pressed into place, the distance between the upper end of the strip through hole and the limiting bolt is 1 to 2 mm.

[0006] The circumferential side wall of the movable positioning cylinder is symmetrically provided with two planes, and the strip-shaped through holes are provided on the two planes.

[0007] The outer circumferential wall of the sleeve is symmetrically provided with two planes, a through hole is provided on one plane, and a threaded hole is provided on the other plane.

[0008] The top end of the valve seat positioning core shaft on the movable positioning cylinder is processed with a chamfer, and the upper end and the bottom end of the movable positioning cylinder are both processed with chamfers.

[0009] The base and the sleeve are connected and fixed by bolts.

[0010] The pressure head is a cylinder, the center hole of the cylinder is a through hole corresponding to the valve seat, and a sink is arranged at the top and bottom of the pressure head.

[0011] The pressure head, the movable positioning cylinder and the press-fitting base are all made of Cr12MoV, and the compression spring is made of stainless steel.

[0012] The utility model has the advantages that the tooling for press-fitting the solenoid valve seat can quickly position the solenoid valve seat, and can ensure that the solenoid valve seat will not tilt during the press-fitting process, the solenoid valve seat will not cause serious cutting due to tilting, and the solenoid valve seat and valve sleeve will not deform due to tilting, and the solenoid valve processed by the tooling has a higher pass rate. In addition, the press-fitting tooling is easy to disassemble and can process solenoid valves of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A-direction sectional view;

[0015] Figure 3 Schematic diagram of the press-fitting process of the utility model, a is the completion of loading, b is the press-fitting, c is the completion of press-fitting, and d is the lifting and taking out of the material;

[0016] Figure 4 It is a schematic diagram of the replacement process of the movable positioning cylinder in the utility model. DETAILED DESCRIPTION

[0017] like Figures 1 to 4As shown, a tool for interference fit of a solenoid valve seat comprises a pressure head 1, a base 7 is arranged below the pressure head, a sleeve 4 is arranged on the upper end surface of the base 7, the base 7 and the sleeve 4 are connected and fixed by bolts 8, and the bolt connection is convenient for disassembly and replacement. A movable positioning cylinder 9 is loosely fitted in the hole of the sleeve 4, a compression spring 6 is arranged between the lower end of the movable positioning cylinder 9 and the base 7, and the compression spring 6 is used to make the upper end of the movable positioning cylinder 9 extend out of the sleeve 4 to ensure that the solenoid valve seat 2 and the solenoid valve sleeve 3 do not contact after loading, so as to avoid the solenoid valve seat 2 from being skewed. A valve seat positioning core shaft 9b is arranged at the upper end of the movable positioning cylinder 9, a through hole 4a is arranged on one side of the wall of the sleeve 4, and a threaded hole 4b is arranged on the other side, and two planes are symmetrically arranged on the outer circumferential wall of the sleeve 4, a through hole 4a is arranged on one side of the plane, and a threaded hole 4b is arranged on the other side of the plane. The movable positioning cylinder 9 is radially provided with a strip-shaped through hole 9a that penetrates the cylinder. The circumferential side wall of the movable positioning cylinder 9 is symmetrically provided with two planes, and the strip-shaped through hole 9a is provided on the two planes. The long axis of the strip-shaped through hole 9a extends along the axial direction of the movable positioning cylinder 9. A limiting bolt 5 passes through the through hole 4a on the wall of the sleeve 4 and the strip-shaped through hole 9a of the movable positioning cylinder 9 in sequence, and is threadedly connected with the threaded hole 4b on the wall of the sleeve 4 to limit the lifting stroke of the movable positioning cylinder 9. After the movable positioning cylinder 9 is pressed into place, the distance between the upper end of the strip-shaped through hole 9a and the limiting bolt 5 is 1 to 2 mm. The top of the valve seat positioning mandrel 9b on the movable positioning cylinder 9 is chamfered, and the upper and lower ends of the movable positioning cylinder 9 are chamfered. The chamfer on the valve seat positioning mandrel 9b is convenient for guiding the valve seat positioning hole when in use, so as to realize the rapid assembly of the valve seat; the upper end chamfer of the movable positioning cylinder 9 is convenient for guiding the assembly of the valve sleeve 3, so as to realize rapid assembly, and the lower end chamfer is convenient for guiding when positioning and assembling into the inner hole of the sleeve. The pressure head 1, the movable positioning cylinder 9 and the press-fitting base are all made of Cr12MoV, and the compression spring 6 is made of stainless steel. The pressure head 1 is a cylinder, and the center hole of the cylinder is a through hole corresponding to the valve seat 2. The through hole is matched with the cylindrical clearance of the boss of the solenoid valve seat, which facilitates and quickly realizes the assembly and positioning of the pressure head. A sinker 1a is set at the top and bottom of the pressure head 1. The sinker 1a can avoid the step surface of the end face of the solenoid valve seat 2, and can distribute the pressure to the part close to the interference fit during press fitting, so as to avoid large torque generated during the press fitting process and cause deformation of the valve seat. The sinkers 1a are set at the bottom and the top, which can reduce the steps of manually distinguishing the direction of the pressure head when assembling the pressure head 1, saving processing time.

[0018] When assembling the tooling, first fix the sleeve and the base with bolts, then put the compression spring into the sleeve, put the movable positioning cylinder into the sleeve, and fix the movable positioning cylinder and the sleeve with the limit bolts, and the compression spring is compressed a certain distance. After assembling the press-fitting tooling, place the solenoid valve sleeve on the outside of the movable positioning cylinder, and the bottom end face of the solenoid valve sleeve is in contact with the upper end face of the sleeve, and then place the solenoid valve seat on the valve seat positioning core shaft of the movable positioning cylinder, and the lower end face of the solenoid valve seat is in contact with the upper end face of the movable positioning cylinder. At this time, the solenoid valve seat and the solenoid valve sleeve are not in contact, and the compression spring is compressed a certain distance. Then, the center hole of the pressure head and the end face boss cylinder of the solenoid valve seat are positioned and placed on the solenoid valve seat, and then the press-fitting equipment is started to start press-fitting. The solenoid valve sleeve is stationary during the press-fitting process. After being pressed into place, a gap of 1 to 2 mm is left between the upper end of the strip through hole of the movable positioning cylinder and the limit bolt. The pressing equipment moves up, the compression spring lifts the movable positioning cylinder, the workpiece leaves the sleeve, and the pressure head and the workpiece are removed in turn.

[0019] This solenoid valve seat interference fit tooling can be used to fit solenoid valve seats of different specifications. When fitting solenoid valve seats of different specifications, the movable positioning cylinder needs to be replaced. First, remove the limit bolt, then remove the movable positioning cylinder, and then put the movable positioning cylinder of other specifications into the sleeve, and finally insert the limit bolt into the holes of the sleeve and the movable positioning cylinder and tighten them.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A tool for interference fit of a solenoid valve seat, comprising a pressure head (1), characterized in that: A base (7) is arranged below the pressure head (1), a sleeve (4) is arranged on the upper end surface of the base (7), a movable positioning cylinder (9) is loosely fitted in the hole of the sleeve (4), a compression spring (6) is arranged between the lower end of the movable positioning cylinder (9) and the base (7), the compression spring (6) is used to make the upper end of the movable positioning cylinder (9) extend out of the sleeve (4), a valve seat positioning core shaft (9b) is arranged at the upper end of the movable positioning cylinder (9), and a through hole is arranged on one side of the wall of the sleeve (4). (4a), a threaded hole (4b) is arranged on the other side, a strip-shaped through hole (9a) penetrating the cylinder is radially arranged on the movable positioning cylinder (9), the major axis of the strip-shaped through hole (9a) extending along the axial direction of the movable positioning cylinder (9), a limiting bolt (5) passes through the through hole (4a) on the wall of the sleeve (4) and the strip-shaped through hole (9a) of the movable positioning cylinder (9) in sequence, and is threadedly connected with the threaded hole (4b) on the wall of the sleeve (4), so as to limit the lifting stroke of the movable positioning cylinder (9).

2. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: After the movable positioning cylinder (9) is pressed into place, the distance between the upper end of the strip-shaped through hole (9a) and the limiting bolt (5) is 1 to 2 mm.

3. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The circumferential side wall of the movable positioning cylinder (9) is symmetrically provided with two planes, and the strip-shaped through holes (9a) are provided on the two planes.

4. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The outer circumferential wall of the sleeve (4) is symmetrically provided with two planes, a through hole (4a) is provided on one plane, and a threaded hole (4b) is provided on the other plane.

5. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The top end of the valve seat positioning core shaft (9b) on the movable positioning cylinder (9) is chamfered, and the upper end and the bottom end of the movable positioning cylinder (9) are both chamfered.

6. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The base (7) and the sleeve (4) are connected and fixed by bolts (8).

7. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The pressure head (1) is a cylinder, the center hole of the cylinder is a through hole corresponding to the valve seat (2), and a sink (1a) is provided at the top and bottom of the pressure head (1).

8. The tooling for interference fit of the solenoid valve seat according to claim 1, characterized in that: The pressure head (1), the movable positioning cylinder (9) and the press-fitting base are all made of Cr12MoV, and the compression spring (6) is made of stainless steel.

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