Shock absorber bottom valve for rail transit

Abstract

The utility model provides a shock absorber bottom valve for rail transit, which relates to the field of rail transit and comprises a shock absorber bottom valve body and a valve rod, the valve rod penetrates through the middle of the shock absorber bottom valve body, a limiting bottom plate is sleeved on the cylindrical surface of the lower end of the valve rod, and the side end of the limiting bottom plate is fixedly inserted into the valve rod through a positioning plate. A limiting ring plate is attached to the upper surface of the limiting bottom plate, an anti-falling block is welded to the lower surface of the limiting ring plate, the limiting bottom plate is in positioning connection with the positioning plate through the anti-falling block, a columnar groove is formed in the upper surface of the limiting bottom plate, and the lower end of the limiting ring plate is connected with the wall of the columnar groove through a connecting spring. The utility model solves the problem that the 8-shaped connecting through hole in the prior art is easy to be impacted by external force, so that the clamping of the valve rod at the lower end of the limiting boss is loosened and separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit technical field, concretely relates to a shock absorber bottom valve for rail transit. BACKGROUND

[0002] The shock absorber bottom valve is mainly used for oil pressure shock absorber in rail transit, and its role is to restrain the rebound force generated by the spring after absorbing the vibration, reduce the impact from the road surface, thereby improving the driving smoothness and riding comfort of the vehicle, through the search, the prior art (announcement number: CN202322475211.8) a shock absorber bottom valve convenient to install, the document records "the valve rod passes through upper valve plate and lower baffle in sequence, is equipped with the limit boss on the upper end of valve rod, the lower surface of limit boss and the upper surface of upper valve plate are opposite, namely can limit the valve rod to move down.In the lower end of valve rod, the ladder shaft connected with lower baffle is equipped, the corresponding connecting through hole is equipped on lower baffle, the shape of this connecting through hole is "8" character type, the ladder shaft can be inserted into the connecting through hole, namely the connection of both is realized by the mode of clamping.The above structure is arranged, can conveniently realize the connection between each component, need not carry out the thread and riveting fixed", but the connecting through hole of "8" character type in prior art is prone to the problem of loose and disengagement of the valve rod clamping at the lower end of limit boss due to external force impact. CONTENT OF UTILITY MODEL

[0003] In order to overcome the defects existing in the prior art, a shock absorber bottom valve for rail transit is provided to solve the problem that the connecting through hole of "8" character type in the prior art is prone to the problem of loose and disengagement of the valve rod clamping at the lower end of limit boss due to external force impact.

[0004] In order to achieve the above-mentioned purpose, a shock absorber bottom valve for rail transit is provided, which comprises: a shock absorber bottom valve body and a valve rod, a valve rod is penetrated through the middle part of the shock absorber bottom valve body,

[0005] The lower end of the valve rod is sleeved with a limiting bottom plate, the side end of the limiting bottom plate is inserted and fixed with the valve rod through a positioning plate, the upper surface of the limiting bottom plate is attached with a limiting ring plate, the lower surface of the limiting ring plate is welded with an anti-disengagement block, the limiting bottom plate is positioned and connected with the positioning plate through the anti-disengagement block, the upper surface of the limiting bottom plate is provided with a columnar groove, and the lower end of the limiting ring plate is connected with the groove wall of the columnar groove through a connecting spring.

[0006] Further, a center groove is formed in the middle part of the shock absorber bottom valve body, the valve rod is inserted into the center groove, and an oil leakage hole is formed in the outer side end of the center groove.

[0007] Further, an oil flow groove is arranged at the outer side end of the oil leakage hole, and a flow valve plate is attached to the upper surface of the shock absorber bottom valve body; and the flow valve plate is located at the groove on the oil flow groove.

[0008] Further, the shock absorber bottom valve body lower surface is provided with an elastic valve sheet, and the elastic valve sheet and the spacing between the limiting ring plate are provided with a damping block.

[0009] Further, the valve rod upper end is welded with a valve rod top plate, and the valve rod top plate lower surface is connected with the flow-through valve sheet through a tower type spring.

[0010] Further, the positioning plate outer side end is fixed with a U-shaped plug-in plate; and the U-shaped plug-in plate is plugged at the limiting bottom plate outer ring surface, and the positioning plate is annularly plugged at the limiting bottom plate and the valve rod.

[0011] Further, the positioning plate middle part is penetrated with an anti-dropping block; and the anti-dropping block is in the form of a rectangular plate.

[0012] The rail transit shock absorber bottom valve of the utility model is installed by inserting the valve rod lower end surface and the limiting bottom plate through the positioning plate, the positioning plate and the limiting bottom plate are positioned by the anti-dropping block of the limiting ring plate lower end surface, the valve rod and the limiting bottom plate inserted installation structure is prevented from loosening and separating, the shock absorber bottom valve valve rod assembly installation is facilitated to be stable, the detachable shock absorber bottom valve is effectively prevented from loosening and separating, the rail transit oil pressure shock absorber is ensured to normally operate, and the assembly effect of the shock absorber bottom valve is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a front view structural schematic diagram of the rail transit shock absorber bottom valve of the utility model embodiment.

[0014] Fig. 2 It is a front view cross-sectional structural schematic diagram of the rail transit shock absorber bottom valve of the utility model embodiment.

[0015] Fig. 3 It is a lower surface structural schematic diagram of the rail transit shock absorber bottom valve of the utility model embodiment.

[0016] Fig. 4 It is a top view cross-sectional structural schematic diagram of the valve rod and the limiting bottom plate of the utility model embodiment.

[0017] In the drawing: 1, shock absorber bottom valve body; 11, oil drain hole; 12, center groove; 13, elastic valve sheet; 14, oil flow-through slot; 2, valve rod; 21, valve rod top plate; 22, tower type spring; 3, flow-through valve sheet; 4, limiting bottom plate; 41, limiting ring plate; 42, anti-dropping block; 43, damping block; 44, columnar groove; 45, connecting spring; 5, positioning plate; 51, U-shaped plug-in plate. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0019] Referring to Figs. 1 to 4 The utility model provides a shock absorber bottom valve for rail transit, include: shock absorber bottom valve body 1 and valve rod 2, the middle part of shock absorber bottom valve body 1 is passed through valve rod 2,

[0020] The lower end of valve rod 2 is sleeved with a limiting bottom plate 4, the side end of limiting bottom plate 4 is inserted and fixed with valve rod 2 through a positioning plate 5, the upper surface of limiting bottom plate 4 is attached with a limiting ring plate 41, the lower surface of limiting ring plate 41 is welded with an anti-loosening block 42, limiting bottom plate 4 is positioned and connected with positioning plate 5 through anti-loosening block 42, the upper surface of limiting bottom plate 4 is provided with a columnar groove 44, the lower end of limiting ring plate 41 is connected with the groove wall of columnar groove 44 through a connecting spring 45.

[0021] First, flow valve plate 3 and tower type spring 22 are located at the upper end of shock absorber bottom valve body 1, the upper end valve rod top plate 21 of inserted valve rod 2 is connected with tower type spring 22, positioning plate 5 is inserted and installed with the lower end surface of valve rod 2 and limiting bottom plate 4 at this time, positioning plate 5 and limiting bottom plate 4 in the inserted state are positioned through the anti-loosening block 42 of the lower end surface of limiting ring plate 4, the inserted and installed structure of valve rod 2 and limiting bottom plate 4 is prevented from loosening and separating, the installation of shock absorber bottom valve rod assembly is conveniently ensured to be stable, the loosening and separation of detachable shock absorber bottom valve is effectively prevented, the normal operation of oil pressure shock absorber in rail transit is ensured, and the assembly effect of shock absorber bottom valve is improved.

[0022] In the embodiment, the middle part of shock absorber bottom valve body 1 is provided with a center groove 12, valve rod 2 is inserted in the center groove 12, and the outer side end of center groove 12 is provided with a oil drain hole 11. The outer side end of oil drain hole 11 is provided with an oil flow groove 14, and the upper surface of shock absorber bottom valve body 1 is attached with a flow valve plate 3, and the flow valve plate 3 is located at the groove opening of oil flow groove 14.

[0023] As a preferred embodiment, the oil flow groove 14 and the oil drain hole 11 are respectively the oil outflow channels at the lower end and the upper end of shock absorber bottom valve body 1, the flow of oil in the shock absorber is conveniently controlled, the impact of liquid is reduced, and the protection of the shock absorber used in rail transit is achieved.

[0024] In the embodiment, the lower surface of shock absorber bottom valve body 1 is provided with an elastic valve plate 13, and a damping block 43 is inserted between the elastic valve plate 13 and the limiting ring plate 41.

[0025] As a preferable embodiment, the elastic valve sheet 13 is used for controlling the flow of oil at the oil drain hole 11, when the oil in the shock absorber is compressed towards the lower end of the shock absorber bottom valve body 1, the elastic valve sheet 13 is deformed under pressure, so that the excess oil is discharged downwards through the oil drain hole 11.

[0026] In the embodiment, the valve rod top plate 21 is welded on the upper end of the valve rod 2, and the lower surface of the valve rod top plate 21 is connected with the flow valve sheet 3 through the tower spring 22.

[0027] As a preferable embodiment, when the tower spring 22 is compressed, the flow valve sheet 3 is moved upwards to separate the oil flow groove 14, so that the oil at the lower end of the shock absorber bottom valve body 1 flows to the upper end of the shock absorber bottom valve body 1 through the oil flow groove 14.

[0028] In the embodiment, the U-shaped plug plate 51 is fixed on the outer side end of the positioning plate 5, and the U-shaped plug plate 51 is plugged on the outer ring surface of the limiting bottom plate 4, and the positioning plate 5 is annularly plugged on the limiting bottom plate 4 and the valve rod 2. The anti-disengagement block 42 is penetrated through the middle part of the positioning plate 5, and the anti-disengagement block 42 is in the form of a rectangular plate.

[0029] As a preferable embodiment, the U-shaped plug plate 51 and the positioning plate 5 constitute the assembly of the limiting bottom plate 4 and the valve rod 2, so that the limiting bottom plate 4 and the valve rod 2 are installed and fixed. The anti-disengagement block 42 prevents the positioning plate 5 from disengaging and moving from the groove of the limiting bottom plate 4 and the valve rod 2, effectively preventing the detachable shock absorber bottom valve from loosening and disengaging, and facilitating the stable installation of the shock absorber bottom valve rod assembly.

[0030] The shock absorber bottom valve for rail transit can effectively solve the problem that the "8" shaped connecting through hole is easily impacted by external force, causing the lower end of the limiting boss to be loosely connected and disengaged, and facilitate the stable installation of the shock absorber bottom valve rod assembly, effectively prevent the detachable shock absorber bottom valve from loosening and disengaging, ensure the normal operation of the oil pressure shock absorber in rail transit, improve the assembly effect of the shock absorber bottom valve, and be suitable for the shock absorber bottom valve for rail transit.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A shock absorber bottom valve for rail transportation, comprising: Shock absorber bottom valve body (1) and valve rod (2), the valve rod (2) is inserted into the middle of the shock absorber bottom valve body (1), characterized by: The lower end of the valve rod (2) is sleeved with a limiting bottom plate (4), the side end of the limiting bottom plate (4) is inserted and fixed with the valve rod (2) through a positioning plate (5), the upper surface of the limiting bottom plate (4) is attached with a limiting ring plate (41), the lower surface of the limiting ring plate (41) is welded with an anti-drop block (42), the limiting bottom plate (4) is positioned and connected with the positioning plate (5) through the anti-drop block (42), the upper surface of the limiting bottom plate (4) is provided with a cylindrical groove (44), and the lower end of the limiting ring plate (41) is connected with the groove wall of the cylindrical groove (44) through a connecting spring (45).

2. The shock absorber bottom valve for rail transit according to claim 1, characterized in that, The middle of the shock absorber bottom valve body (1) is provided with a center groove (12), and the valve rod (2) is inserted into the center groove (12), and the outer side end of the center groove (12) is provided with a oil drain hole (11).

3. The shock absorber bottom valve for rail transit according to claim 2, characterized in that, The outer side end of the oil drain hole (11) is provided with an oil flow channel (14), and the upper surface of the shock absorber bottom valve body (1) is attached with a flow valve plate (3); and the flow valve plate (3) is located on the channel of the oil flow channel (14).

4. The shock absorber bottom valve for rail transit according to claim 1, characterized in that, The lower surface of the shock absorber bottom valve body (1) is provided with an elastic valve plate (13), and the elastic valve plate (13) and the limiting ring plate (41) are inserted with a damping block (43).

5. The shock absorber bottom valve for rail transit according to claim 1, characterized in that, The upper end of the valve rod (2) is welded with a valve rod top plate (21), and the lower surface of the valve rod top plate (21) is connected with the flow valve plate (3) through a tower spring (22).

6. The shock absorber bottom valve for rail transit according to claim 1, characterized in that, The outer side end of the positioning plate (5) is fixed with a U-shaped plug plate (51); and the U-shaped plug plate (51) is inserted into the outer annular surface of the limiting bottom plate (4), and the positioning plate (5) is annularly inserted into the limiting bottom plate (4) and the valve rod (2).

7. The shock absorber bottom valve for rail transit according to claim 1, characterized in that, The positioning plate (5) is penetrated by an anti-drop block (42); and the anti-drop block (42) is in the shape of a rectangular plate.

Images