Tool for press fitting of piston expansion one-way valve

Abstract

Aiming at the structural characteristics of the piston and the mounting requirements of the expansion one-way valve, the tool is provided with the supporting point position, the I-shaped pressing sheet and the guide pipe, so that the condition that the expansion one-way valve does not generate relative displacement and pressing deviation in the pressing process can be ensured; the whole press-fitting process is simplified, the expansion one-way valve after press-fitting meets the installation requirement, it is fundamentally ensured that the expansion one-way valve can achieve the optimal working performance, and the expansion one-way valve is suitable for industrial use and popularization.

Description

Technical Field

[0001] This utility model belongs to the field of automotive expansion check valve tooling fixtures, and specifically relates to a tooling for press-fitting piston expansion check valves. Background Technology

[0002] The function of an expansion check valve in a hydraulic system is to control the flow direction of oil. This type of check valve combines the features of a check valve and an expansion plug. It is commonly used in hydraulic systems for flow control in small-diameter applications. Currently, this type of check valve is installed on the clutch piston of a certain type of gearbox.

[0003] In actual production, due to the limitations of its clutch piston structure, the current press-fitting method for this one-way valve involves placing a small pad under the expansion one-way valve mounting hole of the piston. This pad cannot be too large and must be cylindrical. After placing the small pad at the bottom of the mounting hole, a worker needs to hold the other side of the piston to ensure that the piston is in a horizontal position during press-fitting. Then, another worker operates the press to perform the press-fitting. During the press-fitting process, because the piston is not fixed, the expansion one-way valve and the piston are prone to relative displacement, resulting in improper installation, misalignment, and damage to the expansion one-way valve. This makes the installation difficult and seriously affects the installation progress and working performance of the expansion one-way valve. Utility Model Content

[0004] The purpose of this invention is to provide a tooling for press-fitting a piston expansion check valve, so as to solve the problems of high labor costs, high installation difficulty, and insufficient performance of the piston expansion check valve after installation in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A tooling for press-fitting a piston expansion check valve includes a base plate and a piston. The piston has expansion valve mounting holes on both the left and right sides for installing the expansion check valve. A support assembly is provided in the middle of the base plate.

[0007] The support assembly includes a cylindrical support member, and a support ring is coaxially arranged on the outer side of the support member; vertical fixing tube mounting holes are opened on the left and right sides of the support member.

[0008] The shape of the support member and the support ring matches the inner shape of the piston, and the piston can be mounted on the base plate by the support assembly; when the piston is mounted on the base plate, the two expansion valve mounting holes and the two fixing tube mounting holes are on the same straight line.

[0009] It also includes a guide tube, the inner wall size of which matches the inner wall size of the expansion valve mounting hole; an "L"-shaped fixing tube is fixedly connected to one side of the guide tube, and the fixing tube can be inserted into the fixing tube mounting hole; when the fixing tube is inserted into the fixing tube mounting hole, the guide tube is located on the same side of the expansion valve mounting hole and is coaxial with the expansion valve mounting hole.

[0010] It also includes an I-shaped pressure plate composed of two rectangular plates and a connecting plate. Both ends of the two rectangular plates are provided with through holes. The base plate is provided with four bolt holes, which are evenly distributed around the piston and correspond one-to-one with the four through holes of the I-shaped pressure plate in space. The I-shaped pressure plate can press the piston tightly by screwing it to the base plate.

[0011] This utility model also has the following features:

[0012] Furthermore, a bolt hole is also provided in the middle of the support member;

[0013] The connecting plate of the I-shaped pressure plate has a through hole at the corresponding position;

[0014] The I-shaped pressure plate can be screwed to the support member through the bolt hole in the middle of the support member.

[0015] Furthermore, arrow-shaped markings are provided on both the left and right sides of the base plate;

[0016] The arrow-shaped markings all point to the nearest mounting hole for the fixing tube.

[0017] Furthermore, the upper part of the guide tube is coaxially connected to a funnel-shaped pipe fitting.

[0018] Furthermore, the guide tube and the fixing tube are integrally formed structures.

[0019] Furthermore, the gap between the lower end face of the guide tube and the hole surface of the expansion valve mounting hole on the piston is no greater than 1mm.

[0020] Compared with the prior art, this utility model has the following technical effects:

[0021] This utility model discloses a tooling for press-fitting a piston expansion check valve. Designed with consideration for the structural characteristics of the piston and the installation requirements of the expansion check valve, the tooling includes support points, an I-shaped pressure plate, and a guide tube. This ensures that the expansion check valve will not experience relative displacement or pressure deviation during the press-fitting process, simplifying the entire process. Furthermore, the press-fitted expansion check valve meets the installation requirements, fundamentally ensuring that the expansion check valve achieves optimal working performance, making it suitable for industrial use and promotion. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the tooling for press-fitting a piston expansion check valve according to this utility model.

[0023] Figure 2 This is an overall sectional view of the tooling for press-fitting a piston expansion check valve according to this utility model;

[0024] Figure 3 This is a schematic diagram of the base plate structure in this utility model.

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Base plate; 2. Piston; 3. Expansion check valve; 4. Support component; 5. Support ring; 6. Fixing pipe mounting hole; 7. Guide tube; 8. Fixing pipe; 9. I-shaped pressure plate; 10. Bolt hole. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the expansion check valve is a commonly used expansion check valve.

[0028] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0029] like Figures 1 to 3 As shown, a tooling for press-fitting a piston expansion check valve includes a base plate 1 and a piston 2. Expansion valve mounting holes for installing expansion check valves 3 are provided on both the left and right sides of the piston 2. A support assembly is provided in the middle of the base plate 1.

[0030] The support assembly includes a cylindrical support member 4, with a support ring 5 coaxially arranged on the outer side of the support member 4; vertical fixing tube mounting holes 6 are opened on the left and right sides of the support member 4.

[0031] The shapes of the support member 4 and the support ring 5 match the inner shape of the piston 2, and the piston 2 can be mounted on the base plate 1 through the support assembly; when the piston 2 is mounted on the base plate 1, the two expansion valve mounting holes and the two fixing pipe mounting holes 6 are on the same straight line.

[0032] It also includes a guide tube 7, the inner wall size of which matches the inner wall size of the expansion valve mounting hole; an "L"-shaped fixing tube 8 is fixedly connected to one side of the guide tube 7, and the fixing tube 8 can be inserted into the fixing tube mounting hole 6; when the fixing tube 8 is inserted into the fixing tube mounting hole 6, the guide tube 7 is located on the same side of the expansion valve mounting hole and is coaxial with the expansion valve mounting hole.

[0033] As a preferred option, the guide tube 7 and the fixing tube 8 are integrally molded structures.

[0034] It also includes an I-shaped pressure plate 9 composed of two rectangular plates and a connecting plate. Both ends of the two rectangular plates have through holes. The base plate 1 has four bolt holes 10, which are evenly distributed around the piston 2 and correspond one-to-one with the four through holes of the I-shaped pressure plate 9 in space. The I-shaped pressure plate 9 can be screwed to the base plate 1 through the bolt holes 10, thereby pressing the piston 2.

[0035] Based on the specific structure of piston 2, this embodiment has a support member 4 and a support ring 5 designed on the base 1, which can fit completely with piston 2 to ensure that there will be no side flipping or air compression during the pressing process.

[0036] The following is a specific implementation method of this embodiment:

[0037] First, place the base 1 horizontally on the press worktable, and place the piston 2 on the base 1 so that the two expansion valve mounting holes and the two fixed pipe mounting holes 6 are on the same straight line.

[0038] Next, place the I-shaped pressure plate 9 on the piston 2, align the through hole on the I-shaped pressure plate 9 with the bolt hole 10 on the base 1, and use screws of matching specifications to pass through the through hole of the I-shaped pressure plate 9, and tighten the screws in sequence to fix the piston 2 on the base 1.

[0039] Next, the fixing tube 8 is inserted into the corresponding fixing tube mounting hole 6. At this time, the guide tube 7 is located on the expansion valve mounting hole on the same side and is coaxial with the expansion valve mounting hole. The expansion check valve 3 is placed in the guide tube 7, and the expansion check valve 3 slides freely in the guide tube 7 into the expansion check valve mounting hole on the piston 4.

[0040] At this point, use an external hydraulic press to drive the pressure rod, align it with the port of the guide tube 7, and start the external hydraulic press to work downwards. After the pressure rod moves to the installation tail of the expansion check valve 3, it continues to move downwards until the installation tail of the expansion check valve 3 is fully expanded and engaged with the wall of the expansion check valve installation hole of the piston 2. Then lift the pressure rod and remove the guide tube 7. Repeat this operation to install the expansion check valve 3 into the other expansion check valve installation hole to complete the press-fitting.

[0041] Finally, simply lift the pressure rod, reset the external hydraulic press, remove the guide tube 5, loosen and remove the screws one by one, remove the I-shaped pressure plate 9, and take out the piston 2 to complete the entire pressing process.

[0042] As a preferred option, bolt holes 10 are also provided in the middle of the support member 4;

[0043] The connecting plate of the I-shaped pressure plate 9 has a through hole at the corresponding position. The I-shaped pressure plate 9 can be screwed to the support member 4 through the bolt hole 10 in the middle of the support member 4, which further improves the stability during pressing.

[0044] As a preferred option, arrow-shaped markings are provided on both the left and right sides of the base plate 1;

[0045] All arrow-shaped markings point to the mounting hole 6 of the fixed tube. This arrangement ensures that the mounting hole of the expansion check valve of the piston 2 is horizontally aligned with the arrow markings on the base 1 during use, facilitating installation.

[0046] As a preferred option, the upper part of the guide tube 7 is coaxially connected to a funnel-shaped fitting, which facilitates the insertion of the expansion check valve 3.

[0047] As a preferred option, the gap between the lower end face of the guide tube 7 and the hole face of the expansion valve mounting hole on the piston (2) is no more than 1mm, so as to prevent the one-way valve from sliding out due to excessive gap between the two faces.

Claims

1. A tool for press-fitting a piston expansion check valve, comprising a base plate (1) and a piston (2), said piston (2) having expansion valve mounting holes (3) formed on both left and right sides thereof for mounting expansion check valves (3), characterized in that, The middle part of the bottom plate (1) is provided with a support assembly; The support assembly comprises a cylindrical support piece (4), and a support ring (5) is coaxially arranged outside the support piece (4); vertical fixed pipe mounting holes (6) are formed on the left and right sides of the support piece (4); The shapes of the support piece (4) and the support ring (5) match the shape of the inner side of the piston (2), and the piston (2) can be installed on the bottom plate (1) through the support assembly; when the piston (2) is installed on the bottom plate (1), the two expansion valve mounting holes and the two fixed pipe mounting holes (6) are on the same straight line; A guide pipe (7) is further included, the inner wall size of the guide pipe (7) matches the inner wall size of the expansion valve mounting hole; an "L"-shaped fixed pipe (8) is fixedly connected to one side of the guide pipe (7), and the fixed pipe (8) can be inserted into the fixed pipe mounting hole (6); when the fixed pipe (8) is inserted into the fixed pipe mounting hole (6), the guide pipe (7) is located on the same side of the expansion valve mounting hole and coaxial with the expansion valve mounting hole; A I-shaped pressing piece (9) composed of two rectangular plates and a connecting plate is further included, through holes are formed at the two ends of the two rectangular plates; four bolt holes (10) are formed on the bottom plate (1), and the four bolt holes (10) are evenly distributed around the piston (2) and correspond to the four through holes of the I-shaped pressing piece (9) in space position; the I-shaped pressing piece (9) can press the piston (2) through the screwing mode with the bottom plate (1).

2. The tooling for press fitting a piston expansion check valve of claim 1, wherein, A bolt hole (10) is also formed in the middle part of the support piece (4); A through hole is formed in the corresponding position of the connecting plate of the I-shaped pressing piece (9); The I-shaped pressing piece (9) can be screwed with the support piece (4) through the bolt hole (10) in the middle part of the support piece (4).

3. The tooling for press fitting a piston expansion check valve of claim 2, wherein, Arrow-shaped marks are arranged on the left and right sides of the bottom plate (1); The arrow-shaped marks all point to the closest fixed pipe mounting hole (6).

4. The tool for press fitting a piston expansion check valve of claim 1, wherein, A funnel-shaped pipe is coaxially connected to the upper part of the guide pipe (7).

5. The tool for press fitting a piston expansion check valve of claim 1, wherein, The guide pipe (7) and the fixed pipe (8) are integrally formed.

6. The tool for press fitting a piston expansion check valve of claim 5, wherein, The gap between the lower end surface of the guide pipe (7) and the hole surface of the expansion valve mounting hole on the piston (2) is not greater than 1 mm.

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