Subway rail vehicle oil damper sealing ring contraction installation tool

Abstract

A contraction installation tool for a sealing ring of an oil damper of a metro rail vehicle relates to the technical field of oil dampers of metro rail vehicles, adopts a guide sleeve push-in type installation method, and does not need to bend the sealing ring, so that the physical reliability is effectively improved, the production efficiency is improved, and the quality risk is reduced. In the contraction mounting tool for the sealing ring of the oil damper of the subway rail vehicle, the small end part of a guide sleeve is used for being inserted into an inner hole of a guide seat, and the large end part of a taper hole of the guide sleeve is upward; the sealing ring is placed in the taper hole of the guide sleeve, and the shot opening end of the sealing ring faces downwards; the push rod is used for pressing the sealing ring into a groove where the O-shaped ring is located. The leveling mandrel is used for being inserted into the sealing ring and expanding and leveling the sealing ring.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic vibration dampers for subway rail vehicles, and in particular to a tooling for shrinking and installing the sealing ring of a hydraulic vibration damper for subway rail vehicles, which improves upon the traditional installation method of bending it into a kidney shape. Background Technology

[0002] Currently, the guide seat structure of the hydraulic shock absorber in existing subway rail vehicles widely uses a combination sealing structure of O-rings and sealing rings (also known as step seals), which consists of two or more series sealing systems. Specifically, the step seal is composed of O-rings and sealing rings, and multiple sets are distributed along the axial direction and installed in the groove of the guide cover to play a role in multiple sealing.

[0003] In the prior art, during installation, the O-ring is first placed into the sealing groove of the guide cover, and the O-ring is mostly made of oil-resistant nitrile rubber, which can easily enter the groove after bending; then the sealing ring is bent into a kidney shape with a special tool and placed into the groove.

[0004] However, because the sealing ring is made of PTFE (polytetrafluoroethylene), it is easy to form bending marks when bent, and these marks are not easy to remove during subsequent leveling. When the bending marks cannot be removed, the oil will leak from the bending point during operation, causing leakage failure of the shock absorber. Utility Model Content

[0005] The purpose of this utility model is to provide a shrinkage installation tool for the sealing ring of a hydraulic shock absorber for subway rail vehicles. It adopts a guide sleeve push-in installation method, which eliminates the need to bend the sealing ring, thereby effectively improving physical reliability, increasing production efficiency, and reducing quality risks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A tooling for shrinking and installing the sealing ring of a hydraulic shock absorber for subway rail vehicles includes: a guide sleeve with an inner taper, a push rod, and a leveling mandrel;

[0008] The small end of the guide sleeve is used to insert into the inner hole of the guide seat, and the large end of the tapered hole of the guide sleeve faces upward; the sealing ring is placed into the tapered hole of the guide sleeve, and the round end of the sealing ring faces downward;

[0009] The push rod is used to press the sealing ring into the groove where the O-ring is located;

[0010] The leveling mandrel is used to insert into the sealing ring and expand and level the sealing ring.

[0011] The guide sleeve with an inner taper includes: a guide sleeve body with a tapered hole, and an inlet section integrally formed with the guide sleeve body, wherein the inlet section is located at the small end of the tapered hole of the guide sleeve.

[0012] The inlet section includes: a wedge-shaped portion connected to the guide sleeve body, and a straight cylindrical portion connected to the wedge-shaped portion; the wedge-shaped portion is aligned with the conical hole direction of the guide sleeve, and the straight cylindrical portion has a straight hole.

[0013] Specifically, the push rod is a cylinder, and the bottom center of the cylinder has an exhaust channel.

[0014] Furthermore, the leveling mandrel includes: a cylindrical section and a wedge-shaped section integrally formed with the cylindrical section, wherein the wedge-shaped section is arranged in the axial direction.

[0015] A method for shrinking and installing the sealing ring of a hydraulic vibration damper for subway rail vehicles includes the following steps:

[0016] Insert the O-ring into the guide seat groove;

[0017] The sealing ring is passed through a guide sleeve with an inner taper and pressed into the guide seat groove using a push rod;

[0018] Use a leveling mandrel to extend the leveling process.

[0019] In practical applications, the sealing ring is pressed into the guide seat groove through a guide sleeve with an inner taper and using a push rod, specifically including the following steps:

[0020] Insert the small end of the guide sleeve into the inner hole of the guide seat, with the large end of the tapered hole of the guide sleeve facing upward; place the sealing ring into the tapered hole of the guide sleeve, with the round end of the sealing ring facing downward;

[0021] Use the push rod to press the sealing ring into the groove where the O-ring is located;

[0022] Remove the push rod.

[0023] The expansion and leveling using a leveling mandrel specifically includes the following steps:

[0024] Insert the leveling mandrel into the sealing ring repeatedly 3-4 times, and then expand and level the sealing ring.

[0025] Compared with existing technologies, the sealing ring shrinkage installation fixture for the metro rail vehicle hydraulic vibration damper described in this utility model has the following advantages:

[0026] In the shrink-fit installation fixture for the sealing ring of the hydraulic vibration damper for subway vehicles provided by this utility model, the small end of the guide sleeve is inserted into the inner hole of the guide seat, and the large end of the tapered hole of the guide sleeve faces upward; the sealing ring is placed into the tapered hole of the guide sleeve, and the round end of the sealing ring faces downward; the push rod is used to press the sealing ring into the groove where the O-ring is located; the leveling mandrel is used to insert into the sealing ring and expand and level the sealing ring. Therefore, this installation fixture is simple and effective to operate, and there is no need to bend the sealing ring, thereby effectively avoiding oil leakage failure of the vibration damper, thus effectively improving physical reliability, and effectively improving assembly efficiency and reducing quality risks. In other words, the shrink-fit installation fixture for the sealing ring of the hydraulic vibration damper for subway vehicles provided by this utility model improves the existing sealing ring bending assembly method into a shrink-fit installation method, thereby effectively avoiding bending marks generated on the sealing ring during the bending process, thus effectively improving the quality of the installed sealing ring and significantly improving production efficiency. Attached Figure Description

[0027] Figure 1 A schematic diagram of the guide sleeve in the hydraulic shock absorber sealing ring shrinkage installation tool for subway track vehicles provided in this embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the push rod in the sealing ring shrinkage installation tooling for the hydraulic shock absorber of the subway track vehicle provided in this embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the leveling mandrel in the shrinkage installation tooling for the sealing ring of the hydraulic shock absorber of the subway track vehicle provided in this embodiment of the utility model.

[0030] Figure label:

[0031] 1-Guide sleeve; 10-Tapered hole; 11-Guide sleeve body; 12-Inlet section; 121-Wedge-shaped part; 122-Straight cylindrical part; 120-Straight hole;

[0032] 2-Push rod; 21-Cylinder; 22-Exhaust passage;

[0033] 3-Leveling mandrel; 31-Cylindrical section; 32-Wedge-shaped section;

[0034] 4-Guide seat; 5-Sealing ring; 6-O-ring. Detailed Implementation

[0035] In the existing technology, since the sealing ring is made of PTFE (polytetrafluoroethylene), it cannot be bent like rubber when installed into a closed groove. If it is bent into a kidney shape before installation, it cannot be guaranteed that the bending marks will be 100% eliminated after leveling.

[0036] For ease of understanding, the following description, in conjunction with the accompanying drawings, provides a detailed description of the sealing ring shrinkage installation fixture for the hydraulic vibration damper of the subway track vehicle provided in this embodiment of the present invention.

[0037] This utility model embodiment provides a tooling for shrinking and installing the sealing ring of a hydraulic shock absorber for subway rail vehicles, such as... Figures 1-3 As shown, it includes: a guide sleeve 1 with an inner taper, a push rod 2, and a leveling mandrel 3;

[0038] The small end of the guide sleeve 1 is used to insert into the inner hole of the guide seat 4, and the large end of the tapered hole of the guide sleeve 1 faces upward; the sealing ring 5 is placed into the tapered hole of the guide sleeve 1, and the round end of the sealing ring 5 faces downward.

[0039] Push rod 2 is used to press sealing ring 5 into the groove where O-ring 6 is located;

[0040] The leveling mandrel 3 is used to insert into the sealing ring 5 and to expand and level the sealing ring 5.

[0041] This utility model embodiment provides another method for shrinking and installing the sealing ring of a hydraulic shock absorber in a subway track vehicle, including the following steps:

[0042] Insert the O-ring 6 into the groove of the guide seat 4;

[0043] The sealing ring 5 is passed through the guide sleeve 1 with an inner taper and pressed into the groove of the guide seat 4 using the push rod 2;

[0044] Use leveling mandrel 3 to perform extended leveling.

[0045] Compared with the prior art, the installation fixture and method for shrinking the sealing ring of the hydraulic vibration damper for subway rail vehicles described in this embodiment of the invention have the following advantages:

[0046] In the shrink-fit installation fixture for the sealing ring of the hydraulic vibration damper for subway vehicles provided in this embodiment of the present invention, the small end of the guide sleeve 1 is inserted into the inner hole of the guide seat 4, and the large end of the tapered hole of the guide sleeve 1 faces upward; the sealing ring 5 is placed in the tapered hole of the guide sleeve 1, and the round end of the sealing ring 5 faces downward; the push rod 2 is used to press the sealing ring 5 into the groove where the O-ring 6 is located; the leveling mandrel 3 is used to insert into the sealing ring 5 and expand and level the sealing ring 5. Therefore, this installation fixture is simple and effective to operate, and does not require bending of the sealing ring, thereby effectively avoiding oil leakage failure of the vibration damper, thus effectively improving physical reliability, and effectively improving assembly efficiency and reducing quality risks. In other words, the shrink-fit installation fixture for the sealing ring of the hydraulic vibration damper for subway vehicles provided in this embodiment of the present invention improves the existing sealing ring bending assembly method into a shrink-fit installation method, thereby effectively avoiding bending marks generated on the sealing ring during the bending process, thus effectively improving the quality of the installed sealing ring and significantly improving production efficiency.

[0047] Among them, such as Figures 1-3 As shown, the guide sleeve 1 with an inner taper may include: a guide sleeve body 11 with a tapered hole 10, and an inlet section 12 integrally formed with the guide sleeve body 11, wherein the inlet section 12 is located at the small end of the tapered hole 10 of the guide sleeve 1.

[0048] The aforementioned inlet section 12 may include: a wedge-shaped portion 121 connected to the guide sleeve body 11, and a straight cylindrical portion 122 connected to the wedge-shaped portion 121; the wedge-shaped portion 121 is aligned with the direction of the tapered hole 10 of the guide sleeve 1, and the straight cylindrical portion 122 has a straight hole 120.

[0049] Specifically, such as Figures 1-3 As shown, the push rod 2 can be a cylinder 21, and the bottom center of the cylinder 21 has an exhaust channel 22.

[0050] Furthermore, such as Figures 1-3 As shown, the leveling mandrel 3 may include: a cylindrical section 31 and a wedge-shaped section 32 integrally formed with the cylindrical section 31, and the wedge-shaped section 32 is arranged in the axial direction.

[0051] In practical applications, such as Figures 1-3 As shown, the process of pressing the sealing ring 5 into the groove of the guide seat 4 through the guide sleeve 1 with an inner taper and using the push rod 2 can specifically include the following steps:

[0052] Insert the small end of the guide sleeve 1 into the inner hole of the guide seat 4, with the large end of the tapered hole 10 of the guide sleeve 1 facing upward; place the sealing ring 5 into the tapered hole 10 of the guide sleeve 1, with the round end of the sealing ring 5 facing downward.

[0053] Use push rod 2 to press sealing ring 5 into the groove where O-ring 6 is located;

[0054] Remove push rod 2.

[0055] Among them, such as Figures 1-3 As shown, the above-mentioned expansion leveling using the leveling mandrel 3 can specifically include the following steps:

[0056] Insert the leveling mandrel 3 into the sealing ring 5 repeatedly 3-4 times, and then expand and level the sealing ring 5.

[0057] In summary, the sealing ring shrinkage installation fixture for the metro rail vehicle hydraulic shock absorber provided in this embodiment of the invention has the following advantages:

[0058] First, the sealing ring does not need to be bent, thus avoiding the formation of bending marks;

[0059] Second, the use of guide sleeves, push rods, and leveling mandrels can effectively improve production efficiency.

[0060] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fixture for shrinking and installing the sealing ring of a hydraulic vibration damper for subway rail vehicles, characterized in that, include: Guide sleeves with internal taper, push rods, and leveling mandrels; The small end of the guide sleeve is used to insert into the inner hole of the guide seat, and the large end of the tapered hole of the guide sleeve faces upward; the sealing ring is placed into the tapered hole of the guide sleeve, and the round end of the sealing ring faces downward; The push rod is used to press the sealing ring into the groove where the O-ring is located; The leveling mandrel is used to insert into the sealing ring and expand and level the sealing ring.

2. The installation fixture for shrinking the sealing ring of the hydraulic vibration damper for subway rail vehicles according to claim 1, characterized in that, The guide sleeve with an inner taper includes: a guide sleeve body with a tapered hole, and an inlet section integrally formed with the guide sleeve body, wherein the inlet section is located at the small end of the tapered hole of the guide sleeve. The inlet section includes: a wedge-shaped portion connected to the guide sleeve body, and a straight cylindrical portion connected to the wedge-shaped portion; the wedge-shaped portion is aligned with the conical hole direction of the guide sleeve, and the straight cylindrical portion has a straight hole.

3. The installation fixture for shrinking the sealing ring of the hydraulic vibration damper for subway rail vehicles according to claim 1, characterized in that, The push rod is a cylinder, and the bottom center of the cylinder has an exhaust channel.

4. The installation fixture for shrinking and retracting the sealing ring of the hydraulic vibration damper for subway rail vehicles according to claim 1, characterized in that, The leveling mandrel includes a cylindrical section and a wedge-shaped section integrally formed with the cylindrical section, wherein the wedge-shaped section is oriented toward the axis.

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