Bottom valve assembly and lateral damper

Abstract

The utility model relates to the technical field of shock absorbers, and provides a bottom valve assembly and a transverse shock absorber. The bottom valve assembly comprises a bottom valve body provided with a mounting hole; the bottom cover is provided with a positioning groove; the two ends of the positioning pin are contained in the mounting hole and the positioning groove respectively, and the positioning pin is in interference fit with one of the mounting hole and the positioning groove and is in anti-rotation fit with the other one of the mounting hole and the positioning groove. The bottom valve body and the bottom cover are connected in an anti-rotation mode through the positioning pin, the positioning function is achieved for installation of the bottom valve body, it is guaranteed that the installation direction of the bottom valve body is accurate, the direction and the position of the bottom valve body are kept stable relative to the bottom cover in the assembling and working process of the transverse shock absorber, the bottom valve body is prevented from being deflected due to stress, and the service life of the bottom valve body is prolonged. Therefore, rotation and displacement of the oil passing hole of the bottom valve body are avoided, smooth circulation of oil is guaranteed, and the damping effect of the transverse shock absorber is kept stable.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a bottom valve assembly and a lateral shock absorber. Background Art

[0002] The transverse shock absorber is installed in the railway vehicle, and the installation direction of its bottom valve is fixed. However, the current design of the bottom valve of the transverse shock absorber is not equipped with a positioning device, and it is impossible to clearly position the installation direction of the bottom valve. In addition, the bottom valve is installed at the bottom of the inner cylinder of the shock absorber. During the assembly of the transverse shock absorber, the direction of the bottom valve is easily changed due to the force acting on the inner cylinder; even during the operation of the transverse shock absorber, the bottom valve will rotate due to the impact of the oil, causing its direction to deviate.

[0003] The bottom valve is provided with an oil through hole for the oil in the lateral shock absorber to be exchanged between different cylinders. If the direction of the bottom valve is inaccurate, it will affect the normal flow of the oil in the lateral shock absorber and affect the damping effect of the lateral shock absorber.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0005] The utility model provides a bottom valve assembly and a lateral shock absorber, which connect the bottom valve body and the bottom cover through a locating pin to prevent rotation, play a positioning role in the installation of the bottom valve body, ensure the installation direction of the bottom valve body is accurate, and achieve that during the assembly and operation of the lateral shock absorber, the direction and position of the bottom valve body are kept stable relative to the bottom cover, avoiding the deflection of the bottom valve body due to force, thereby avoiding the rotation and displacement of the oil hole of the bottom valve body, thus ensuring smooth oil flow and keeping the damping effect of the lateral shock absorber stable.

[0006] One aspect of the utility model provides a bottom valve assembly for a lateral shock absorber, comprising: a bottom valve body, provided with a mounting hole; a bottom cover, provided with a positioning groove; a positioning pin with an axial notch, the two ends of the positioning pin being respectively accommodated in the mounting hole and the positioning groove, the positioning pin being interference fit with one of the mounting hole and the positioning groove and anti-rotation fit with the other.

[0007] In some embodiments, the positioning pin is interference fit with the mounting hole and anti-rotation fit with the positioning groove.

[0008] In some embodiments, the mounting hole includes an axial hole portion and a tapered hole portion; the positioning pin is interference fit with the axial hole portion and presses against the tapered hole portion.

[0009] In some embodiments, the positioning groove includes a tapered groove portion; the positioning pin presses against the tapered groove portion to cooperate with the positioning groove to prevent rotation.

[0010] In some embodiments, an anti-rotation limiting rib is provided in the positioning groove, and the anti-rotation limiting rib is inserted into the axial notch.

[0011] In some embodiments, the mounting hole is a countersunk hole.

[0012] In some embodiments, the bottom valve body is further provided with an oil passing hole, and the mounting hole is arranged away from the oil passing hole.

[0013] In some embodiments, the oil holes include: a first group of oil holes, which are arranged on the outer ring portion of the bottom valve body, and the end surface of the bottom valve body facing away from the bottom cover is equipped with a first group of valve plates that cooperate with the first group of oil holes; a second group of oil holes, which are arranged on the inner ring portion of the bottom valve body, and the end surface of the bottom valve body facing the bottom cover is equipped with a second group of valve plates that cooperate with the second group of oil holes.

[0014] In some embodiments, the first group of valve plates are limited by ribs on the inner wall of the inner tube of the lateral shock absorber; and the second group of valve plates are assembled to the bottom valve body by bolts.

[0015] Another aspect of the utility model provides a lateral shock absorber, wherein the bottom of the cylinder of the lateral shock absorber is equipped with a bottom valve assembly as described in any of the above embodiments; wherein the bottom valve body is assembled to the bottom of the inner cylinder of the lateral shock absorber, the bottom cover is assembled to the bottom of the outer cylinder of the lateral shock absorber, and the bottom valve body and the bottom cover are connected to prevent rotation via the positioning pin.

[0016] Compared with the prior art, the beneficial effects of the present invention include at least:

[0017] The bottom valve assembly of the utility model reserves mounting holes and positioning grooves on the bottom valve body and the bottom cover respectively, and uses positioning pins to extend into the mounting holes and the positioning grooves, and to have an interference fit with one of the mounting holes and the positioning grooves and to have an anti-rotation fit with the other. On the one hand, it plays a positioning role in the installation of the bottom valve body to ensure that the installation direction of the bottom valve body is accurate. On the other hand, the positioning pins are used to realize the anti-rotation connection between the bottom valve body and the bottom cover, so that the bottom valve body always maintains a stable direction and position after assembly. On the other hand, it can enhance the structural stability of the bottom valve assembly.

[0018] The positioning pin is designed with an axial notch. When the positioning pin is installed, the axial notch is used to slightly deform the positioning pin so that one end of the positioning pin can be inserted into the mounting hole / positioning slot. After installation, the positioning pin expands and resets, thereby tightening in the mounting hole / positioning slot to achieve a stable interference fit. The rotational fit between the positioning pin and the positioning slot / mounting hole can be achieved by interference, tight fit, snap-fit, etc.

[0019] In the lateral shock absorber, the bottom cover is fixedly assembled on the bottom of the outer cylinder, and the bottom valve body is assembled on the bottom of the inner cylinder. The bottom valve body and the bottom cover are connected by a locating pin to prevent rotation, so as to ensure that during the assembly and operation of the lateral shock absorber, the direction and position of the bottom valve body remain stable relative to the bottom cover, thereby avoiding the deflection of the bottom valve body due to force, thereby avoiding the rotation and displacement of the oil hole of the bottom valve body, ensuring smooth oil flow, and thus keeping the damping effect of the lateral shock absorber stable.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the exploded structure of the bottom valve assembly in an embodiment of the utility model is shown;

[0023] Figure 2 A schematic structural diagram of a bottom valve body of a bottom valve assembly in an embodiment of the utility model is shown;

[0024] Figure 3 A schematic structural diagram of a bottom cover of a bottom valve assembly in an embodiment of the utility model is shown;

[0025] Figure 4 A schematic structural diagram showing a bottom valve assembly assembled on a lateral shock absorber in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of the example embodiments to those skilled in the art.

[0027] The accompanying drawings are only schematic illustrations of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar structures, and thus their repeated description will be omitted.

[0028] The words "first", "second" and similar words used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. The orientation or positional relationship indicated by the terms "bottom", "top" and the like is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model. The term "plurality" means two or more, unless otherwise clearly and specifically defined. In addition, in the description of the present utility model, when it is said that a device is "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.

[0030] Figure 1 The exploded structure of the bottom valve assembly in the embodiment of the utility model is shown in FIG. Figure 2 The structure of the bottom valve body of the bottom valve assembly is shown in FIG. Figure 3 The structure of the bottom cover of the bottom valve assembly is shown in FIG. Figure 4 The structure of the bottom valve assembly assembled on the lateral shock absorber is shown; Figures 1 to 4 As shown, the bottom valve assembly for a lateral shock absorber provided by the embodiment of the utility model comprises:

[0031] The bottom valve body 110 is provided with a mounting hole 111;

[0032] The bottom cover 120 is provided with a positioning groove 122;

[0033] The locating pin 130 with the axial notch 133 has its two ends respectively received in the mounting hole 111 and the locating groove 122 . The locating pin 130 is interference fit with one of the mounting hole 111 and the locating groove 122 and anti-rotation fit with the other.

[0034] The bottom valve assembly of the present invention reserves a mounting hole 111 and a positioning groove 122 on the bottom valve body 110 and the bottom cover 120 respectively, and uses a positioning pin 130 to extend into the mounting hole 111 and the positioning groove 122, and has an interference fit with one of the mounting hole 111 and the positioning groove 122 and an anti-rotation fit with the other. On the one hand, it plays a positioning role in the installation of the bottom valve body 110 to ensure that the installation direction of the bottom valve body 110 is accurate. On the other hand, the positioning pin 130 is used to realize the anti-rotation connection between the bottom valve body 110 and the bottom cover 120, so that the bottom valve body 110 always maintains a stable direction and position after assembly. On the other hand, it can enhance the structural stability of the bottom valve assembly.

[0035] It should be noted that in the present invention, the direction and position of the bottom valve body 110 refer to the direction of the bottom valve body 110 along the Figure 4 Arrow C indicates the circumferential direction and position.

[0036] The positioning pin 130 is designed with an axial notch 133. When the positioning pin 130 is installed, the axial notch 133 is used to slightly deform the positioning pin 130 so that one end of the positioning pin 130 can be inserted into the mounting hole 111 / positioning groove 122. After installation, the positioning pin 130 expands and resets, thereby being tightly supported in the mounting hole 111 / positioning groove 122 to achieve a stable interference fit. The rotational fit between the positioning pin 130 and the positioning groove 122 / mounting hole 111 can be achieved by interference fit, tight fit, or snap fit.

[0037] In the lateral shock absorber, the bottom cover 120 is fixedly assembled at the bottom of the outer cylinder 220, and the bottom valve body 110 is assembled at the bottom of the inner cylinder 210. The bottom valve body 110 and the bottom cover 120 are connected to prevent rotation by the locating pin 130, ensuring that during the assembly and operation of the lateral shock absorber, the direction and position of the bottom valve body 110 remain stable relative to the bottom cover 120, avoiding the bottom valve body 110 from being deflected by force, thereby avoiding the oil hole of the bottom valve body 110 from rotating and shifting, ensuring smooth oil flow, and thus keeping the damping effect of the lateral shock absorber stable.

[0038] In some embodiments, the positioning pin 130 is interference-fitted with the mounting hole 111 and anti-rotationally matched with the positioning groove 122. In this way, when assembling the bottom valve assembly, one end of the positioning pin 130 can be firstly interference-fitted into the mounting hole 111, so that the positioning pin 130 and the bottom valve body 110 are assembled into an integral structure, and then the other end of the positioning pin 130 is anti-rotationally matched with the positioning groove 122 of the bottom cover 120, so as to realize the anti-rotation connection between the bottom valve body 110 and the bottom cover 120, and ensure that the relative positions of the two are fixed.

[0039] In other embodiments, the positioning pin 130 may also be interference fit with the positioning groove 122 and anti-rotation fit with the mounting hole 111 .

[0040] In some embodiments, the mounting hole 111 includes an axial hole portion and a tapered hole portion; the positioning pin 130 is interference-fitted with the axial hole portion and abuts against the tapered hole portion. The axial hole portion is used to achieve an interference fit with the positioning pin 130; the tapered hole portion is used to reduce the hole diameter so that the positioning pin 130 can abut against it.

[0041] In some embodiments, the positioning groove 122 includes a tapered groove portion; the positioning pin 130 abuts against the tapered groove portion to prevent rotation with the positioning groove 122. The positioning groove 122 also includes an axial groove portion to provide a space required for the positioning pin 130 to be assembled.

[0042] In some embodiments, an anti-rotation limiting rib (not specifically shown in the figure) is provided in the positioning groove 122, and the anti-rotation limiting rib is inserted into the axial notch 133. In this way, the anti-rotation cooperation effect between the positioning pin 130 and the positioning groove 122 is further enhanced.

[0043] In some embodiments, the mounting hole 111 is a countersunk hole, so that the mounting hole 111 is only used for connecting the positioning pin 130 and does not bear the oil return function, thereby not affecting the damping function of the bottom valve body 110.

[0044] In some embodiments, the bottom valve body 110 is further provided with an oil hole, and the mounting hole 111 is arranged away from the oil hole. The oil hole is used for oil in the lateral shock absorber to be exchanged between different cylinders, specifically, between the lower working chamber 210a of the inner cylinder 210 and the liquid storage chamber 220a of the outer cylinder 220. The mounting hole 111 is arranged away from the oil hole to avoid affecting the performance of the oil hole.

[0045] In some embodiments, the oil holes include: a first group of oil holes 113, which are arranged on the outer ring portion of the bottom valve body 110, and the end surface of the bottom valve body 110 facing away from the bottom cover 120 is equipped with a first group of valve plates 114 that cooperate with the first group of oil holes 113; a second group of oil holes 116, which are arranged on the inner ring portion of the bottom valve body 110, and the end surface of the bottom valve body 110 facing the bottom cover 120 is equipped with a second group of valve plates 117 that cooperate with the second group of oil holes 116.

[0046] The first group of oil holes 113 cooperates with the first group of valve plates 114 to allow the oil in the liquid storage chamber 220a to flow to the lower working chamber 210a; the second group of oil holes 116 cooperates with the second group of valve plates 117 to allow the oil in the lower working chamber 210a to flow to the liquid storage chamber 220a. The bottom valve body 110 and the bottom cover 120 are connected to prevent rotation by the positioning pin 130 to ensure that the direction and position of the bottom valve body 110 relative to the bottom cover 120 remain stable, thereby ensuring the accurate position of the oil holes, so that the oil flows smoothly, thereby maintaining a stable damping effect of the lateral shock absorber.

[0047] In some embodiments, the first set of valve plates 114 are limited to the ribs 212 on the inner wall of the inner tube 210 of the lateral shock absorber; the second set of valve plates 117 are assembled to the bottom valve body 110 by bolts 119 .

[0048] Further, refer to Figure 4 , and combined Figures 1 to 3 As shown, an embodiment of the utility model further provides a lateral shock absorber, the bottom of the cylinder of which is equipped with a bottom valve assembly as described in any of the above embodiments; wherein, the bottom valve body 110 is assembled to the bottom of the inner cylinder 210 of the lateral shock absorber, and the bottom cover 120 is assembled to the bottom of the outer cylinder 220 of the lateral shock absorber, and the bottom valve body 110 and the bottom cover 120 are connected to prevent rotation via a locating pin 130.

[0049] The lateral shock absorber of the present invention utilizes the bottom valve body 110 and the bottom cover 120 to reserve the mounting hole 111 and the positioning groove 122 respectively, and the positioning pin 130 is designed to be interference fit with the mounting hole 111 and anti-rotation fit with the positioning groove 122, so as to position the installation of the bottom valve body 110, ensure the installation direction and position of the bottom valve body 110 are accurate, and enhance the structural stability of the bottom valve assembly; and the positioning pin 130 is used to realize the anti-rotation connection between the bottom valve body 110 and the bottom cover 120, so that the bottom valve body 110 always maintains a stable direction and position after assembly, and ensures that during the assembly and operation of the lateral shock absorber, the bottom valve body 110 will not be deflected by force, so that the direction and position of the oil hole of the bottom valve body 110 can remain stable, so that the oil can flow smoothly, and then the damping effect of the lateral shock absorber remains stable.

[0050] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A bottom valve assembly for a lateral shock absorber, characterized in that: include: The bottom valve body is provided with a mounting hole; A bottom cover is provided with a positioning groove; A positioning pin with an axial notch, wherein both ends of the positioning pin are respectively accommodated in the mounting hole and the positioning slot, and the positioning pin is interference-fitted with one of the mounting hole and the positioning slot and anti-rotationally fitted with the other.

2. The bottom valve assembly according to claim 1, characterized in that: The positioning pin is interference-fitted with the mounting hole and is anti-rotationally fitted with the positioning groove.

3. The bottom valve assembly according to claim 2, characterized in that: The mounting hole comprises an axial hole portion and a tapered hole portion; The positioning pin is interference-fitted with the shaft hole portion and tightly abuts against the tapered hole portion.

4. The bottom valve assembly according to claim 2, characterized in that: The positioning groove includes a tapered groove portion; The positioning pin is pressed against the tapered groove portion to cooperate with the positioning groove to prevent rotation.

5. The bottom valve assembly according to claim 4, characterized in that: The positioning groove is provided with an anti-rotation limiting rib, and the anti-rotation limiting rib is inserted into the axial notch.

6. The bottom valve assembly according to claim 1, characterized in that: The mounting hole is a countersunk hole.

7. The bottom valve assembly according to claim 1, characterized in that: The bottom valve body is also provided with an oil passing hole, and the mounting hole is arranged away from the oil passing hole.

8. The bottom valve assembly according to claim 7, characterized in that: The oil hole comprises: A first group of oil holes is arranged on the outer ring part of the bottom valve body, and the end surface of the bottom valve body away from the bottom cover is equipped with a first group of valve plates matching the first group of oil holes; The second group of oil holes is arranged on the inner ring part of the bottom valve body, and the end surface of the bottom valve body facing the bottom cover is equipped with a second group of valve plates matching the second group of oil holes.

9. The bottom valve assembly according to claim 8, characterized in that: The first set of valve plates is limited to the convex ribs on the inner wall of the inner cylinder of the lateral vibration absorber; The second set of valve plates is assembled to the bottom valve body by bolts.

10. A lateral vibration damper, characterized in that: The bottom of the cylinder of the lateral shock absorber is equipped with a bottom valve assembly as described in any one of claims 1 to 9; The bottom valve body is mounted on the bottom of the inner cylinder of the lateral vibration damper, the bottom cover is mounted on the bottom of the outer cylinder of the lateral vibration damper, and the bottom valve body and the bottom cover are connected to prevent rotation via the positioning pin.

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