Guide rod assembly, base assembly and air spring damper

Abstract

The utility model relates to the technical field of automobile parts, and provides a guide rod assembly, a base assembly and an air spring shock absorber. The guide rod assembly is assembled in a base of the air spring shock absorber, and a cylinder barrel of the air spring shock absorber is arranged in the guide rod assembly in a sleeved mode. The guide rod assembly comprises a guide rod which is provided with an avoiding groove extending in the axial direction and a first guide rib; the inner wall of the guide sleeve is provided with convex ribs distributed at intervals in the circumferential direction and a guide groove extending in the axial direction, the guide rod is movably arranged in the guide sleeve in a penetrating mode in the axial direction, the first guide rib is embedded into the guide groove, and the convex ribs penetrate through the receding groove and protrude out of the inner wall of the guide rod. According to the air spring shock absorber, the guide rod is matched with the guide sleeve, so that the problem that the guide rod cannot move due to the fact that the guide rod clamps the cylinder barrel under the action of lateral force, clamping stagnation faults occur is effectively solved, the axial movement of the guide rod is smooth and not blocked, and then it is guaranteed that the self-adaptive height adjusting function and the buffering and shock absorbing function of the air spring shock absorber are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a guide rod component, a base assembly and an air spring shock absorber. Background Art

[0002] The structure of the air spring shock absorber includes a shock absorber component for vibration reduction and an air spring component for height adjustment. With the development of technology and the improvement of the requirements for driving performance, air spring shock absorbers that can adaptively adjust the height are gradually being developed and used.

[0003] Figure 1 The base structure of the current air spring shock absorber with adaptive height adjustment is shown in FIG. Figure 1 The base 10' of the air spring shock absorber has a built-in height valve 11', which can be connected to the base 10' and the cover plate (the cover plate is located on the top of the air spring shock absorber) according to the change of vehicle height. Figure 1 Inflate the airbag outside the vehicle (not specifically shown) or discharge the gas in the airbag to adjust the height of the airbag and improve driving stability and comfort; during the height adjustment process, the guide rod 20', one end of which is supported by the spring 12' in the base 10' and the other end of which is connected to the cover plate, moves along the axial direction Z.

[0004] The problem with current adaptive height-adjustable air spring shock absorbers is that there are often lateral forces (e.g. Figure 1 The force F) shown in the figure acts on the guide rod 20', causing the guide rod 20' to contact the outer wall of the cylinder of the shock absorber assembly sleeved therein; when the lateral force increases to a certain extent, the guide rod 20' clamps the cylinder and cannot move, resulting in a jamming failure.

[0005] 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

[0006] The utility model provides a guide rod assembly, a base assembly and an air spring shock absorber, which can effectively solve the problem of the guide rod being stuck due to the inability to move due to the clamping cylinder under the action of lateral force through the cooperation of the guide rod and the guide sleeve, ensure that the axial movement of the guide rod is smooth and unobstructed, and further ensure that the adaptive height adjustment function of the air spring shock absorber is not affected.

[0007] According to one aspect of the utility model, a guide rod assembly is provided for an air spring shock absorber, wherein the guide rod assembly is assembled in the base of the air spring shock absorber, and the cylinder sleeve of the air spring shock absorber is disposed in the guide rod assembly; the guide rod assembly comprises: a guide rod provided with an axially extending avoidance groove and a first guide rib; a guide sleeve, the inner wall of which is provided with circumferentially spaced convex ribs and an axially extending guide groove, the guide rod is axially movably inserted into the guide sleeve, the first guide rib is embedded in the guide groove, and the convex rib passes through the avoidance groove and protrudes from the inner wall of the guide rod.

[0008] In some embodiments, the radial dimension of the circular contour surrounded by the front end of the rib matches the outer diameter of the cylinder.

[0009] In some embodiments, the avoidance groove passes through the body and the second end of the guide rod, and the outer wall of the second end of the guide rod is also provided with a first limiting rib, which limits the axial movement stroke of the guide rod relative to the guide sleeve.

[0010] In some embodiments, the first limiting rib is formed as a barb structure with a chamfer and a hook portion.

[0011] In some embodiments, the guide rod assembly also includes a support ring assembled on the second end of the guide rod, and the support ring is provided with any of the following structures: a snap-in rib, which is snapped into the opening of the avoidance groove located at the second end of the guide rod; a second limiting rib, which is axially aligned with the first limiting rib; and a second guide rib, which is axially aligned and spliced ​​with the first guide rib.

[0012] In some embodiments, the support ring includes a first step ring and a second step ring, and the inner wall of the second end of the guide rod is provided with an annular groove; the first step ring is embedded in the annular groove and is aligned and spliced ​​with the inner wall of the guide rod; the second step ring is aligned and spliced ​​with the second end of the guide rod, and the clamping rib, the second limiting rib, and the second guide rib are arranged on the outer wall of the second step ring.

[0013] In some embodiments, an inner wall of the second step ring is provided with a mounting groove.

[0014] In some embodiments, a mounting shoulder is disposed at the first end of the guide rod, and the mounting shoulder limits the axial movement stroke of the guide rod relative to the guide sleeve.

[0015] Another aspect of the utility model provides a base assembly for an air spring shock absorber, comprising: a base with a built-in height valve; a guide rod assembly as described in any of the above embodiments, assembled in the first end of the base through the guide sleeve; and a spring assembled in the second end of the base and connected to the guide rod.

[0016] Another aspect of the utility model provides an air spring shock absorber, comprising the above-mentioned base assembly; wherein, the cylinder of the air spring shock absorber extends into the guide rod, the convex rib of the guide sleeve presses against the outer wall of the cylinder, and the end of the guide rod extending out of the base is assembled with the cover plate of the air spring shock absorber.

[0017] Compared with the prior art, the beneficial effects of the present invention include at least:

[0018] The guide rod assembly of the utility model guides the axial movement of the guide rod by embedding the first guide rib of the guide rod into the guide groove of the guide sleeve, and the first guide rib extends axially to stably and continuously guide the axial movement of the guide rod; the convex rib of the guide sleeve passes through the avoidance groove of the guide rod and protrudes from the inner wall of the guide rod, and when the guide rod assembly is assembled to the air spring shock absorber, the convex rib can support the outer wall of the cylinder barrel, leaving space for the axial movement of the guide rod between the guide sleeve and the cylinder barrel, effectively solving the problem of the guide rod being stuck due to the clamping of the cylinder barrel and being unable to move under the action of lateral force; and the convex ribs are circumferentially spaced on the inner wall of the guide sleeve, ensuring that the guide sleeve supports the outer wall of the cylinder barrel at various circumferential points, thereby ensuring that the axial movement of the guide rod is smooth and unobstructed; during the axial movement of the guide rod, the cooperation between the avoidance groove and the convex rib can also play an auxiliary guiding role.

[0019] Therefore, the guide rod assembly of the utility model effectively solves the problem of the guide rod getting stuck due to the inability to move due to the clamping cylinder under the action of lateral force through the cooperation between the guide rod and the guide sleeve, ensuring that the axial movement of the guide rod is smooth and unobstructed, and further ensuring that the adaptive height adjustment function of the air spring shock absorber is not affected.

[0020] Furthermore, the guide rod is connected to the cover plate of the air spring shock absorber, and the connecting rod of the shock absorber assembly of the air spring shock absorber is connected to the cover plate and extends into the cylinder. The axial movement of the guide rod is smooth and unobstructed, and the axial movement of the cover plate and the piston rod is not obstructed, thereby ensuring that the buffering and vibration reduction function of the air spring shock absorber is not affected.

[0021] 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

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1A schematic structural diagram showing a base portion of a current air spring shock absorber capable of adaptively adjusting height;

[0024] Figure 2 A three-dimensional structural schematic diagram of a guide rod assembly in an embodiment of the utility model is shown;

[0025] Figure 3 A schematic cross-sectional view of the guide rod assembly in an embodiment of the utility model is shown;

[0026] Figure 4 A schematic diagram of the top view of the guide rod assembly in an embodiment of the utility model is shown;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of the guide rod in the embodiment of the utility model is shown;

[0028] Figure 6 A schematic cross-sectional view of the guide rod in an embodiment of the utility model is shown;

[0029] Figure 7 A schematic diagram of the three-dimensional structure of the guide sleeve in the embodiment of the utility model is shown;

[0030] Figure 8 A schematic diagram of the three-dimensional structure of the support ring in the embodiment of the utility model is shown;

[0031] Fig. 9 A schematic cross-sectional view of the support ring in an embodiment of the utility model is shown;

[0032] Fig.10 A schematic diagram showing the structure of the support ring and the guide rod assembled in the embodiment of the utility model;

[0033] Fig.11 A three-dimensional structural schematic diagram of a base assembly in an embodiment of the utility model is shown;

[0034] Fig.12 A partial cross-sectional structural schematic diagram of the base assembly in an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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 position relationship indicated by the terms "upper", "lower", "top", "bottom" and the like are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of description, and do 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, they cannot be understood as limitations 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 direct connections, but also indirect connections through other elements.

[0038] 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.

[0039] The guide rod assembly provided by the utility model is used for an air spring shock absorber and is assembled in a base of the air spring shock absorber, and a cylinder barrel of the air spring shock absorber is sleeved in the guide rod assembly.

[0040] Figure 2 The three-dimensional structure of the guide rod assembly in the embodiment of the utility model is shown in FIG. Figure 3 The cross-sectional structure of the guide rod assembly is shown. Figure 4 The top view structure of the guide rod assembly is shown. Figure 5 The three-dimensional structure of the guide rod is shown in FIG. Figure 6 The cross-sectional structure of the guide rod is shown in FIG. Figure 7 The three-dimensional structure of the guide sleeve is shown; Figures 2 to 7 As shown, the guide rod assembly provided by the embodiment of the utility model includes:

[0041] The guide rod 20 is provided with an axially extending avoidance groove 21 and a first guide rib 22;

[0042] The inner wall of the guide sleeve 30 is provided with circumferentially spaced convex ribs 31 and an axially extending guide groove 32. The guide rod 20 is axially movably arranged in the guide sleeve 30. The first guide rib 22 is embedded in the guide groove 32. The convex rib 31 passes through the avoidance groove 21 and protrudes from the inner wall of the guide rod 20.

[0043] The guide rod assembly of the utility model plays a guiding role in the axial movement of the guide rod 20 by embedding the first guide rib 22 of the guide rod 20 into the guide groove 32 of the guide sleeve 30, and the first guide rib 22 extends axially, which can stably and continuously guide the axial movement of the guide rod 20; the convex rib 31 of the guide sleeve 30 passes through the avoidance groove 21 of the guide rod 20 and protrudes from the inner wall of the guide rod 20, and when the guide rod assembly is assembled to the air spring shock absorber, the convex rib 31 can support the outer wall of the cylinder barrel, leaving space for the axial movement of the guide rod 20 between the guide sleeve 30 and the cylinder barrel, effectively solving the problem of the guide rod 20 being stuck due to the clamping cylinder barrel and being unable to move under the action of lateral force; and the convex ribs 31 are distributed on the inner wall of the guide sleeve 30 at intervals in the circumferential direction, ensuring that the guide sleeve 30 supports the outer wall of the cylinder barrel at various circumferential points, thereby ensuring that the axial movement of the guide rod 20 is smooth and unobstructed; during the axial movement of the guide rod 20, the cooperation between the avoidance groove 21 and the convex rib 31 can also play an auxiliary guiding role.

[0044] Thus, the guide rod assembly of the utility model effectively solves the problem of the guide rod 20 being stuck and unable to move due to the clamping cylinder under the action of lateral force through the cooperation between the guide rod 20 and the guide sleeve 30, ensuring that the axial movement of the guide rod 20 is smooth and unobstructed, and further ensuring that the adaptive height adjustment function of the air spring shock absorber is not affected.

[0045] Furthermore, the guide rod 20 is connected to the cover plate of the air spring shock absorber, and the connecting rod of the shock absorber assembly of the air spring shock absorber is connected to the cover plate and extends into the cylinder. The axial movement of the guide rod 20 is smooth and unobstructed, and the axial movement of the cover plate and the piston rod is not obstructed, thereby ensuring that the buffering and vibration reduction function of the air spring shock absorber is not affected.

[0046] In some embodiments, the radial dimension of the circular profile S formed by the front end of the rib 31 matches the outer diameter of the cylinder.

[0047] For example, the radial dimension of the circular profile S may be equal to the outer diameter of the cylinder, or the radial dimension of the circular profile S may be slightly smaller than the outer diameter of the cylinder; in this way, when the guide rod assembly is assembled to the air spring shock absorber, the rib 31 can support the outer wall of the cylinder, leaving space for the axial movement of the guide rod 20 between the guide sleeve 30 and the cylinder, ensuring that the axial movement of the guide rod 20 is smooth and unobstructed.

[0048] In some embodiments, the avoidance groove 21 passes through the body and the second end 20 b of the guide rod 20 . The outer wall of the second end 20 b of the guide rod 20 is further provided with a first limiting rib 23 . The first limiting rib 23 limits the axial movement stroke of the guide rod 20 relative to the guide sleeve 30 .

[0049] The avoidance groove 21 passes through the body and the second end 20b of the guide rod 20, which can facilitate the assembly of the guide rod 20 and the guide sleeve 30; the first limiting rib 23 can cooperate with the matching structure of the inner wall of the guide sleeve 30 to limit the axial upward movement of the guide rod 20 relative to the guide sleeve 30. The first limiting rib 23 can be distributed at intervals at the second end 20b of the guide rod 20 in the circumferential direction to play a stable limiting role.

[0050] In some embodiments, the first limiting rib 23 is formed as a barb structure with a chamfer 231 and a hook portion 232. The chamfer 231 facilitates the assembly of the guide rod 20 and the guide sleeve 30; the hook portion 232 limits the axial upward movement of the guide rod 20 relative to the guide sleeve 30.

[0051] Figure 8 The three-dimensional structure of the support ring is shown in FIG. Fig. 9 The cross-sectional structure of the support ring is shown. Fig.10 The structure of the support ring and the guide rod is shown in figure; Figures 2 to 10 As shown, in some embodiments, the guide rod assembly also includes a support ring 40 assembled on the second end 20b of the guide rod 20, and the support ring 40 is provided with any of the following structures: a snap-in rib 41, which is snapped into the opening 210 of the avoidance groove 21 located at the second end 20b of the guide rod 20; a second limiting rib 42, which is axially aligned with the first limiting rib 23; and a second guide rib 43, which is axially aligned and spliced ​​with the first guide rib 22.

[0052] By snapping the clamping rib 41 into the opening 210 of the avoidance groove 21, the structural strength of the second end 20b of the guide rod 20 is enhanced, and an auxiliary limiting effect is played on the axial upward movement stroke of the guide rod 20 relative to the guide sleeve 30. The second limiting rib 42 can cooperate with the matching structure of the inner wall of the guide sleeve 30, and the second limiting rib 42 is axially aligned with the first limiting rib 23 to enhance the limiting effect on the axial upward movement stroke of the guide rod 20 relative to the guide sleeve 30. The second guide rib 43 is axially aligned with the first guide rib 22, so that the axial movement of the guide rod 20 relative to the guide sleeve 30 can be guided continuously and stably.

[0053] In some embodiments, the support ring 40 includes a first step ring 40a and a second step ring 40b, and the inner wall of the second end 20b of the guide rod 20 is provided with an annular groove 200; the first step ring 40a is embedded in the annular groove 200 and is aligned and spliced ​​with the inner wall of the guide rod 20; the second step ring 40b is aligned and spliced ​​with the second end 20b of the guide rod 20, and the clamping rib 41 / the second limiting rib 42 / the second guide rib 43 are arranged on the outer wall of the second step ring 40b.

[0054] Both the support ring 40 and the second end 20b of the guide rod 20 form a step-shaped structure, and part of the step structure of the support ring 40 is embedded in the step structure of the second end 20b of the guide rod 20, so that the assembly formed after the support ring 40 and the second end 20b of the guide rod 20 are assembled has an integral inner wall and outer wall, so as to achieve the structural enhancement of the second end 20b of the guide rod 20 while avoiding affecting the axial movement of the guide rod 20.

[0055] In some embodiments, the inner wall of the second step ring 40b is provided with an assembly groove 400. The assembly groove 400 is used for spring assembly when the guide rod assembly is assembled to the air spring damper.

[0056] In some embodiments, a first end of the guide rod 20 is provided with an assembly shoulder 20 a, and the assembly shoulder 20 a limits the axial movement stroke of the guide rod 20 relative to the guide sleeve 30 .

[0057] The assembly shoulder 20a can cooperate with the end 30a of the guide sleeve 30 to limit the movement stroke of the guide rod 20 relative to the guide sleeve 30 in the axial downward direction. In addition, the assembly shoulder 20a is also used for assembly with the cover plate of the air spring damper.

[0058] The embodiment of the utility model also provides a base assembly for an air spring damper. Fig.11 The three-dimensional structure of the base assembly is shown in FIG. Fig.12 The partial cross-sectional structure of the base assembly is shown; Fig.11 and Fig.12 , and refer to the above Figures 2 to 10 As shown, the base assembly includes:

[0059] Base 10, with built-in height valve;

[0060] A guide rod assembly is assembled in the first end 10a of the base 10 through a guide sleeve 30;

[0061] The spring 12 is assembled in the second end 10 b of the base 10 and connected to the guide rod 20 .

[0062] One end of the spring 12 may be connected to the second end 10 b of the base 10 , and the other end of the spring 12 may be assembled in the assembly groove 400 of the support ring 40 .

[0063] When the air spring damper is working, the guide rod 20 can move axially under the support of the spring 12 and the guidance of the guide sleeve 30 to cooperate with the height adjustment of the air spring damper. The cooperation between the guide rod 20 and the guide sleeve 30 can ensure that the axial movement of the guide rod 20 is smooth and unobstructed, thereby ensuring that the adaptive height adjustment function and the buffering and vibration reduction function of the air spring damper are not affected.

[0064] Continue to combine Figures 2 to 12As shown, the embodiment of the utility model also provides an air spring shock absorber, which is equipped with the above-mentioned base assembly; wherein, the cylinder of the air spring shock absorber extends into the guide rod 20, the rib 31 of the guide sleeve 30 presses against the outer wall of the cylinder, and the end of the guide rod 20 extending out of the base 10 (i.e., the first end of the guide rod 20) is assembled with the cover plate of the air spring shock absorber.

[0065] The air spring shock absorber is equipped with a base assembly with a guide rod assembly, which can achieve smooth and unobstructed axial movement of the guide rod 20 through the cooperation between the guide rod 20 and the guide sleeve 30, combined with the supporting effect of the support ring 40, thereby ensuring the smooth realization of the adaptive height adjustment function and buffering and vibration reduction function of the air spring shock absorber.

[0066] 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 guide rod assembly for an air spring shock absorber, wherein the guide rod assembly is assembled in a base of the air spring shock absorber, and a cylinder of the air spring shock absorber is sleeved in the guide rod assembly; It is characterized in that The guide rod assembly comprises: A guide rod is provided with an axially extending avoidance groove and a first guide rib; The guide sleeve has an inner wall provided with circumferentially spaced convex ribs and an axially extending guide groove, the guide rod is axially movably arranged in the guide sleeve, the first guide rib is embedded in the guide groove, and the convex rib passes through the avoidance groove and protrudes from the inner wall of the guide rod.

2. The guide rod assembly according to claim 1, characterized in that The radial dimension of the circular contour surrounded by the front end of the convex rib matches the outer diameter dimension of the cylinder.

3. The guide rod assembly according to claim 1, characterized in that: The avoidance groove passes through the body and the second end of the guide rod, and the outer wall of the second end of the guide rod is further provided with a first limiting rib, which limits the axial movement stroke of the guide rod relative to the guide sleeve.

4. The guide rod assembly according to claim 3, characterized in that: The first limiting rib is formed as a barb structure with a chamfer and a hook portion.

5. The guide rod assembly according to claim 3, characterized in that: It also includes a support ring mounted on the second end of the guide rod, wherein the support ring is provided with any of the following structures: A clamping rib, clamped into the opening of the avoidance groove located at the second end of the guide rod; A second limiting rib, axially aligned with the first limiting rib; The second guide rib is axially aligned and spliced ​​with the first guide rib.

6. The guide rod assembly according to claim 5, characterized in that The support ring includes a first step ring and a second step ring, and the inner wall of the second end of the guide rod is provided with a ring groove; The first step ring is embedded in the ring groove and is aligned and spliced ​​with the inner wall of the guide rod; The second step ring is aligned and spliced ​​with the second end of the guide rod, and the clamping rib, the second limiting rib and the second guide rib are arranged on the outer wall of the second step ring.

7. The guide rod assembly according to claim 6, characterized in that The inner wall of the second step ring is provided with a mounting groove.

8. The guide rod assembly according to claim 1, characterized in that The first end of the guide rod is provided with an assembly shoulder, and the assembly shoulder limits the axial movement stroke of the guide rod relative to the guide sleeve.

9. A base assembly for an air spring damper, characterized in that: include: Base, with built-in height valve; The guide rod assembly according to any one of claims 1 to 8, wherein the guide sleeve is fitted into the first end of the base; A spring is assembled in the second end of the base and connected to the guide rod.

10. An air spring damper, characterized in that: comprising the base assembly as claimed in claim 9; The cylinder of the air spring shock absorber extends into the guide rod, the convex rib of the guide sleeve presses against the outer wall of the cylinder, and the end of the guide rod extending out of the base is assembled with the cover plate of the air spring shock absorber.

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