CN218971726U

CN218971726U - Buffer device

Info

Publication number: CN218971726U
Application number: CN202223087866.XU
Authority: CN
Inventors: 郝庆军; 潘振宇; 钮震; 张广彬; 苏贤进
Original assignee: Jointech Suzhou Vehicle System Co ltd
Current assignee: Jointech Suzhou Vehicle System Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-05-05
Anticipated expiration: 2032-11-17

Abstract

The utility model relates to a damping device comprising a suspension cylinder (1) and a piston rod (2) inside the suspension cylinder (1) and capable of axial telescopic movement relative to the suspension cylinder (1), characterized in that: at least one of the suspension cylinder (1) and the piston rod (2) is provided with a buffer structure; the buffer structure is arranged on at least one of the suspension cylinder and the piston rod to buffer the contact between the piston and the cylinder head caused by overlarge rebound of the piston rod, so that the rigid contact between the piston and the cylinder head is avoided, the service life of the suspension cylinder is prolonged, the contact noise is reduced, the after-sale maintenance cost of the suspension cylinder is reduced when the suspension cylinder is maintained, and the buffer structure can be applied to anti-collision mechanisms inside hydraulic parts such as a shock absorber, an hydro-pneumatic suspension and the like.

Description

Buffer device

Technical Field

The utility model relates to the technical field of buffer technology of front hydro-pneumatic suspension cylinders of dumpers, in particular to a buffer device.

Background

Traditional engineering vehicle front suspension system often adopts the reinforced plate spring structure, but arouses the cracked phenomenon of leaf spring easily under the high operating mode that bears, and driving travelling comfort is relatively poor moreover, can't satisfy market needs.

The hydro-pneumatic suspension structure has the advantages of variable damping, variable rigidity and the like, and the main working principle is that hydraulic oil is used as a force transmission medium, inert gas is used as an elastic medium, and an orifice, a one-way valve and the like are used as a suspension device of a vibration damping element.

However, the hydro-pneumatic suspension structure also has the defects of the hydro-pneumatic suspension structure, and in the running process, if the extreme road condition is met, the rebound of the piston rod is too large, the piston can be caused to be in contact with the cylinder head, the long-time running can be caused to cause plastic contact deformation of the piston and the cylinder head, and the situation is serious, so that the piston rod is damaged by pulling, and the cylinder head or the piston is scrapped.

Disclosure of Invention

In order to solve the defects and shortcomings in the prior art, the utility model provides a buffer device.

The specific scheme provided by the utility model is as follows:

a damping device, damping device includes and hangs the jar and just can hang the inside piston rod that just can relative the jar axial telescopic motion of hanging of jar, its characterized in that: at least one of the suspension cylinder and the piston rod is provided with a buffer structure.

As a further preferred embodiment of the present utility model, the buffer structure is a buffer pad, and the buffer pad is fixed to the suspension cylinder at a position near the cylinder head of the extension end of the piston rod.

As a further preferable embodiment of the utility model, the buffer pad is arranged in a semi-annular split symmetrical structure, the buffer pad comprises a buffer portion, and a first buffer pad positioning portion and a second buffer pad positioning portion are sequentially arranged on the inner wall of the buffer portion near the extending end of the piston rod.

As a further preferable embodiment of the utility model, the suspension cylinder is provided with a cylinder cover close to the extending end of the piston rod, the buffer cushion is fixed on one side of the cylinder cover far away from the extending end of the piston rod, the outer wall of the cylinder cover is sequentially provided with a first cylinder cover positioning part and a second cylinder cover positioning part, the first buffer cushion positioning part is matched with the first cylinder cover positioning part in a positioning way, and the second buffer cushion positioning part is matched with the second cylinder cover positioning part in a positioning way.

As a further preferred embodiment of the present utility model, the buffer structure is a disc spring assembly, and the disc spring assembly is fixed at a cylinder head position of the suspension cylinder near the extension end of the piston rod.

As a further preferable embodiment of the utility model, the disc spring assembly is ring-shaped and comprises a mounting part far away from the extending end of the piston rod, the mounting part is provided with a disc spring part near the extending end of the piston rod, the suspension cylinder is provided with a cylinder cover near the extending end of the piston rod, and the fixing part passes through the mounting part and the disc spring part and then enters the cylinder cover.

As a further preferable implementation mode of the utility model, a plurality of fixed mounting holes for the fixing pieces to pass through are uniformly formed in the annular mounting part;

as a further preferable implementation mode of the utility model, a plurality of fixed mounting grooves for penetrating the fixing pieces are uniformly formed in the cylinder cover.

As a further preferable implementation mode of the utility model, the damping structure is a damping hole, and the damping hole is arranged on the radial outer edge of the piston rod, which is close to the bottom wall of the suspension cylinder.

As a further preferred embodiment of the present utility model, the damper hole includes a damper flow hole and a damper adjustment hole, and the damper adjustment hole is provided on a side axially closer to the projecting end of the piston rod than the damper flow hole.

Compared with the prior art, the utility model has the following technical effects:

the utility model provides a buffer device, which is characterized in that a buffer structure is arranged on at least one of a suspension cylinder and a piston rod to buffer the contact between the piston and a cylinder head caused by overlarge rebound of the piston rod, so that the rigid contact between the piston and the cylinder head is avoided, the service life of the suspension cylinder is prolonged, the contact noise is reduced, the after-sale maintenance cost of the suspension cylinder is reduced when the suspension cylinder is maintained, and the buffer device can be applied to anti-collision mechanisms in hydraulic parts such as a shock absorber, an oil-gas suspension and the like.

Drawings

FIG. 1 is a structural view of a cushioning structure of the present utility model, with cushioning pads selected.

FIG. 2 is a side view of the structure of the cushion of the present utility model.

FIG. 3 is a top view of the structure of the cushion of the present utility model.

Fig. 4 is a structural installation view of a disc spring assembly selected for the buffering structure of the present utility model.

Fig. 5 is a side view of the construction of the disc spring assembly of the present utility model.

Fig. 6 is a top view of the disc spring assembly of the present utility model.

FIG. 7 is a structural view of a damper structure of the present utility model using damper holes.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a buffer device, which comprises a suspension cylinder 1 and a piston rod 2 which is arranged inside the suspension cylinder 1 and can axially stretch and retract relative to the suspension cylinder 1, wherein at least one of the suspension cylinder 1 and the piston rod 2 is provided with a buffer structure; the buffer structure is used for buffering the contact between the piston and the cylinder head caused by overlarge rebound of the piston rod, so that the rigid contact between the piston and the cylinder head is avoided, the service life of the suspension cylinder is prolonged, the contact noise is reduced, the after-sale maintenance cost of the suspension cylinder is reduced during the maintenance of the suspension cylinder, and the buffer structure can be applied to anti-collision mechanisms inside hydraulic parts such as a shock absorber, hydro-pneumatic suspension and the like. The present utility model provides the following three embodiments according to the arrangement position and structure of the buffer structure.

First embodiment

Fig. 1-3 show a first embodiment of the present utility model, wherein the buffer structure is a buffer pad 3, and as shown in fig. 1, the buffer pad 3 is fixed at a cylinder end position of the suspension cylinder 1 near the extending end of the piston rod 2.

As shown in fig. 1-3, the cushion pad 3 is configured as a semi-annular split symmetrical structure, which is convenient for assembly, disassembly and maintenance, the cushion pad 3 comprises a buffer portion 33, and a cushion pad first positioning portion 31 and a cushion pad second positioning portion 32 are sequentially arranged on the inner wall of the buffer portion 33 near the extending end of the piston rod 2 for positioning and mounting with the cylinder cover 11.

As shown in fig. 1, a cylinder cover 11 is arranged at the end of the suspension cylinder 1, which is close to the extending end of the piston rod 2, a cushion pad 3 is fixed on one side of the cylinder cover 11, which is far away from the extending end of the piston rod 2, a cylinder cover first positioning part 111 and a cylinder cover second positioning part 112 are sequentially arranged on the outer wall of the cylinder cover 11, the cushion pad first positioning part 31 is matched with the cylinder cover first positioning part 111 in a positioning manner, and the cushion pad second positioning part 32 is matched with the cylinder cover second positioning part 112 in a positioning manner.

In the present embodiment, the cushion pad first positioning portion 31 is provided in a radially protruding structure, and the head first positioning portion 111 is provided in a radially recessed structure in positioning engagement therewith; similarly, the second positioning portion 32 of the cushion pad is configured as a radial groove structure, the second positioning portion 112 of the cylinder cover is configured as a radial protrusion structure matched with the second positioning portion of the cylinder cover in a positioning manner, and the second positioning portion and the protrusion structure are matched with each other to realize positioning and installation; those skilled in the art will recognize that the groove and projection configuration is but one implementation for a detent installation, and that other configurations may be used by those skilled in the art to achieve a detent installation.

Through setting up blotter 3, when the relative jar 1 axial concertina movement that hangs of piston rod 2, even meet limit road conditions, when the piston rod kick-backs too big, piston rod 2 tip also can contact with blotter 3 earlier, realizes buffering through blotter 3 and avoids piston rod 2 and hang jar 1 direct rigid contact to realize buffering effect increase of service life. In this embodiment, the cushion pad is preferably made of nylon.

Second embodiment

Fig. 4-6 show a second embodiment of the present utility model, wherein the buffer structure is a disc spring assembly 4, and the disc spring assembly 4 is fixed at the cylinder end of the suspension cylinder 1 near the extension end of the piston rod 2.

As shown in fig. 4-6, the disc spring assembly 4 is annular and comprises a mounting portion 41 arranged far away from the extending end of the piston rod 2, a disc spring portion 42 is arranged at the extending end of the mounting portion 41 close to the piston rod 2, a cylinder cover 11 is arranged at the extending end of the suspension cylinder 1 close to the piston rod 2, a fixing piece 43 penetrates through the mounting portion 41 and the disc spring portion 42 and then enters the cylinder cover 11, and the mounting portion 41-level disc spring portion 42 is fixed on one side of the cylinder cover 11 through the fixing piece 43.

As shown in fig. 4-5, a plurality of fixing mounting holes 411 through which the fixing members 43 pass are uniformly formed in the annular mounting portion 41; a plurality of fixing and installing grooves 113 for penetrating the fixing pieces 43 are uniformly formed in the cylinder cover 11.

Through setting up dish spring subassembly 4, when the relative jar 1 axial concertina movement that hangs of piston rod 2, even meet limit road conditions, when the piston rod kick-backs too big, piston rod 2 tip also can earlier with dish spring subassembly 4 contact, realize cushioning effect through dish spring subassembly, avoid piston rod 2 and hang jar 1 direct rigid contact to realize cushioning effect increase of service life.

Third embodiment

Fig. 7 shows a third embodiment of the present utility model, in which the damping structure is a damping hole, and the damping hole is formed on the radial outer edge of the piston rod 2 near the bottom wall of the suspension cylinder 1.

As shown in fig. 7, in this embodiment, the damping hole includes a damping flow hole 51 and a damping adjustment hole 52, the damping flow hole 51 is used for the circulation of damping oil when the piston rod 2 moves axially in a telescopic manner relative to the suspension cylinder 1, the damping adjustment hole 52 is disposed at a side axially closer to the extending end of the piston rod 2 than the damping flow hole 51, and when the piston rod 2 extends to the damping adjustment hole 52 and is covered by the cylinder head, the damping force increases, thereby reducing the degree of rigid impact between the piston and the cylinder head.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A cushioning device, characterized in that: the damping device comprises a suspension cylinder (1) and a piston rod (2) which is arranged inside the suspension cylinder (1) and can axially stretch and retract relative to the suspension cylinder (1), and is characterized in that: at least one of the suspension cylinder (1) and the piston rod (2) is provided with a buffer structure.

2. A cushioning device as set forth in claim 1 wherein: the buffer structure selects a buffer pad (3), and the buffer pad (3) is fixed at the cylinder head position of the suspension cylinder (1) close to the extending end of the piston rod (2).

3. A cushioning device as set forth in claim 2 wherein: the cushion pad (3) is of a semi-annular split symmetrical structure, the cushion pad comprises a buffer part (33), and a cushion pad first positioning part (31) and a cushion pad second positioning part (32) are sequentially arranged on the inner wall of the buffer part (33) close to the extending end of the piston rod (2).

4. A cushioning device as set forth in claim 3 wherein: the cylinder is characterized in that the suspension cylinder (1) is provided with a cylinder cover (11) close to the extending end of the piston rod (2), the buffer pad (3) is fixed on one side, away from the extending end of the piston rod (2), of the cylinder cover (11), a cylinder cover first positioning part (111) and a cylinder cover second positioning part (112) are sequentially arranged on the outer wall of the cylinder cover (11), the buffer pad first positioning part (31) is matched with the cylinder cover first positioning part (111) in a positioning mode, and the buffer pad second positioning part (32) is matched with the cylinder cover second positioning part (112) in a positioning mode.

5. A cushioning device as set forth in claim 1 wherein: the buffer structure selects a disc spring component (4), and the disc spring component (4) is fixed at the cylinder head position of the suspension cylinder (1) close to the extending end of the piston rod (2).

6. A cushioning device as set forth in claim 5 wherein: the disc spring assembly (4) is annular and comprises a mounting portion (41) which is far away from the extending end of the piston rod (2), the mounting portion (41) is close to the extending end of the piston rod (2) and is provided with a disc spring portion (42), the hanging cylinder (1) is close to the extending end of the piston rod (2) and is provided with a cylinder cover (11), and a fixing piece (43) penetrates through the mounting portion (41) and the disc spring portion (42) and then enters the cylinder cover (11).

7. A cushioning device as set forth in claim 6 wherein: a plurality of fixed mounting holes (411) for the fixing pieces (43) to pass through are uniformly formed in the annular mounting part (41).

8. A cushioning device as set forth in claim 6 wherein: a plurality of fixed mounting grooves (113) for penetrating the fixing pieces (43) are uniformly formed in the cylinder cover (11).

9. A cushioning device as set forth in claim 1 wherein: damping holes are selected for the buffer structure, and the damping holes are formed in the radial outer edge, close to the bottom wall of the suspension cylinder (1), of the piston rod (2).

10. A cushioning device as set forth in claim 9 wherein: the damping hole comprises a damping flow hole (51) and a damping adjusting hole (52), and the damping adjusting hole (52) is arranged on one side, which is closer to the extending end of the piston rod (2) in the axial direction, than the damping flow hole (51).