CN112727970A - Buffer device, damping device and operation equipment - Google Patents

Abstract

The invention provides a buffer device, a damping device and operation equipment. The buffer device includes: the elastic rings are arranged in a bending mode and are sequentially overlapped into a cylindrical structure along the axial direction; the first ring body is arranged outside the cylindrical structure in the circumferential direction and is positioned outside the space between the two adjacent elastic rings. According to the invention, the plurality of elastic rings are overlapped into the cylindrical structure, so that the buffer device can be timely intervened in the steering process to improve the anti-roll performance, and the stability of riding is ensured.

Description

Buffer device, damping device and operation equipment

Technical Field

The application belongs to the technical field of mechanical equipment, and particularly relates to a buffering device, a damping device and operation equipment.

Background

In the related art, with the rapid development of industries such as coal and rock mining, the development of transportation tools for coal and rock mining is more and more mature. Among them, the transportation means of the mining articulated dump truck are being more and more widely used. With the increasing expansion of the market of the articulated vehicle, the requirement on the comfort of the whole vehicle is higher and higher. The mining articulated dump truck adopts a suspension cylinder, a limiting block adopted in the suspension cylinder mainly takes a rubber ring as a main part, the anti-roll characteristic is not improved, and the stability of riding can not be ensured.

Disclosure of Invention

Embodiments according to the present invention aim to solve or improve at least one of the above technical problems.

A first object according to an embodiment of the present invention is to provide a buffering device.

It is a second object according to an embodiment of the present invention to provide a shock-absorbing device.

A third object according to an embodiment of the present invention is to provide a working apparatus.

To achieve the first object according to an embodiment of the present invention, a technical aspect of the present invention provides a buffer device including: the elastic rings are arranged in a bending mode and are sequentially overlapped into a cylindrical structure along the axial direction; the first ring body is arranged outside the tubular structure in the circumferential direction and is positioned between the two adjacent elastic rings.

In this technical scheme, the elastic ring is made by elastic material for the elastic ring can be compressed owing to have elasticity, and can resume the original shape after being compressed. The elastic ring has a side wall, and the side wall of the elastic ring is bent and arranged, so that the elastic ring can be folded towards the bending convex direction when being extruded, the space of the elastic ring for elastic deformation can be increased, the elastic ring is not easy to damage after elastic deformation, and the service life of the elastic ring is prolonged. The elastic rings are sequentially overlapped in the axial direction to form a cylindrical structure, so that the structural strength and the buffering time of the buffering device which is elastically deformed after being compressed are improved, and the process of compressing and restoring the buffering device is more stable. The first ring body has an annular structure, and the first ring body can be coaxially arranged with the elastic ring. First ring body cup joints between two adjacent elastic rings for buffer receives the compression denaturation back, and first ring body can play reinforcing buffer's structural strength's effect. In addition, first ring body protrusion in the outer wall of elastic ring for first ring body can play the effect of handrail, conveniently gets buffer and puts.

In addition, the technical solution provided by the embodiment of the present invention may further have the following additional technical features:

in the technical scheme, the wall thicknesses of the elastic rings are equal.

In this technical scheme, the wall thickness of elastic ring is equal, can guarantee the structural strength of elastic ring.

In any of the above solutions, the elastic ring has a side wall, and the side wall is convex towards the outside and is bent into an arc shape.

In this technical scheme, the middle part of the lateral wall of elasticity ring is outside protrusion for the diameter of the lateral wall of elasticity ring diminishes from the middle part to opposite both ends gradually, and the elasticity ring is when receiving the compression and producing elastic deformation, can outwards fold or folding trend at the middle part, and elastic deformation is comparatively even, thereby can improve the stationarity that the elasticity ring produced elastic deformation or recovered, and then can guarantee that buffer carries out the stationarity that cushions.

In any of the above technical solutions, the outer diameter of the elastic ring is smaller than the outer diameter of the first ring body.

In this technical scheme, the lateral wall of elastic ring is outside protrusion and crooked, and in the process that the elastic ring received the compression and produced the deformation, the bulge of elastic ring can be because of receiving the extrusion and outwards expand under the elastic force effect. The outer diameter of the elastic ring is always smaller than that of the first ring body, so that the stability of the buffer device in the compression or recovery process can be guaranteed.

In any of the above technical solutions, the elastic ring is made of a thermoplastic polyester elastic ring.

In the technical scheme, the thermoplastic polyester elastic ring is a block copolymer containing polyester hard segments and polyether soft segments, and has the elasticity of rubber and the strength of engineering plastics. The thermoplastic polyester elastic ring is used as the material of the elastic ring, so that the elasticity and the structural strength of the elastic ring in the compression process or the recovery process can be ensured, and the stability of the buffer device in the use process can be ensured.

To achieve the second object according to an embodiment of the present invention, a technical solution of the present invention provides a shock-absorbing device including: a hydraulic cylinder including a cylinder tube; the outer shell is arranged outside the cylinder barrel, and an annular cavity is formed between the outer shell and the cylinder barrel; the fixing seat is annularly arranged outside the cylinder barrel and is positioned in the annular cavity; in the buffer device in any technical scheme, the buffer device is sleeved outside the cylinder barrel, the buffer device is in clearance fit with the cylinder barrel, and the buffer device is connected with the fixed seat.

In this technical scheme, buffer cup joints in the outside of cylinder and with fixing base fixed connection, and the one end of keeping away from the fixing base as buffer receives the extrusion, and buffer can carry out the axial along the cylinder and stretch out and draw back, and buffer can recover along the cylinder under the effect of elastic force. Through setting up the elastic ring of different quantity, can control buffer's the time that is compressed, can adjust travelling comfort and stability of riding. In addition, a shock-absorbing device provided according to an embodiment of the invention includes the shock-absorbing device according to any of the embodiments of the invention, and therefore has all the advantageous effects of the shock-absorbing device according to any of the embodiments of the invention.

In any of the above technical solutions, the elastic ring is annularly provided with a plurality of drain holes.

In the technical scheme, the buffer device is positioned in the annular cavity, and the side wall of the elastic ring is arranged in a bending way, so that the elastic ring is separated into an inner cavity and an outer cavity in the annular cavity. Wherein, the inner chamber is enclosed by the surface of elasticity ring sum cylinder. The vent holes pass through the inner and outer chambers. The damping device moves up and down in a reciprocating mode, and the buffering device is compressed or restored. Because of the incompressible characteristic of the hydraulic oil, when the damping device jumps down, the damping device is compressed, and the oil in the inner cavity flows into the outer cavity through the drain hole. When oil flows into the outer cavity from the inner cavity through the drain holes, the drain holes generate damping, the damping values can be different according to the different quantity of the drain holes, and the requirements of different driving comfortableness can be met by setting different drain holes.

Among the above-mentioned technical scheme, buffer and cylinder clearance fit.

In this technical scheme, buffer and cylinder clearance fit for buffer can compress or recover along the outer wall of cylinder under the effect of elastic force.

In any of the above technical solutions, the buffering device further includes: and the second ring body is annularly arranged outside one end of the tubular structure far away from the fixed seat.

In this technical scheme, the second ring body can set up with elastic ring integrated into one piece, and simple structure is reliable. The second ring body sets up in the one end that buffer kept away from the fixing base, and when buffer received the compression, the second ring body received the compression earlier, has avoided compressive force direct action on the elastic ring for the second ring body can play the effect that slows down the compression, and can improve buffer's overall structure's structural strength.

To achieve the third object according to an embodiment of the present invention, a technical aspect of the present invention provides a work apparatus including: a cab; in any scheme, the damping device is arranged on the cab.

In this technical solution, the working equipment provided according to the embodiment of the present invention includes the shock-absorbing device according to any one of the technical solutions of the invention, and therefore has all the advantageous effects of the shock-absorbing device according to any one of the embodiments of the invention.

Additional aspects and advantages of embodiments in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments in accordance with the invention.

Drawings

The above and/or additional aspects and advantages of embodiments according to the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a cushioning device according to some embodiments of the present invention;

FIG. 2 is a schematic illustration in partial cross-section of a shock absorbing device according to some embodiments of the present invention;

FIG. 3 is a front view of a shock absorbing device according to some embodiments of the present invention;

fig. 4 is a block diagram of a component structure of a work apparatus according to some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

1: a working device; 10: a damping device; 100: a buffer device; 110: an elastic ring; 112: a vent hole; 114: a side wall; 120: a first ring body; 130: a second ring body; 140: a third ring body; 200: a hydraulic cylinder; 210: a cylinder barrel; 300: a housing; 310: an annular cavity; 312: an inner cavity; 314: an outer cavity; 400: a fixed seat; 20: a cab.

Detailed Description

In order that the above objects, features and advantages of embodiments in accordance with the present invention can be more clearly understood, embodiments in accordance with the present invention are described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the related art, a cushion system of a shock absorber is disclosed in which a passenger car shock absorber is built in a cushion plug, and the shock absorber functions as a suspension cylinder for a mine car. Passenger car bumper shock absorber includes the buffering stopper, and the buffering stopper is equipped with vertical damping hole structure for the altitude variation of buffering body for vertical damping hole structure damping characteristic changes great, and consequently, the timing characteristic of vertical damping hole structure is relatively poor, makes the adjustability of the damping characteristic of vertical damping hole structure receive the limitation. Meanwhile, if the longitudinal damping hole has a large structure and a large number, the durability of the buffer plug is affected.

The shock absorbing device 100, the shock absorbing device 10, and the working apparatus 1 according to some embodiments of the present invention are described below with reference to fig. 1 to 4.

Example 1

As shown in fig. 1, the present embodiment provides a damping device 100, and the damping device 100 includes: the elastic ring comprises a plurality of elastic rings 110 and a first ring body 120, wherein the elastic rings 110 are arranged in a bending mode, and the elastic rings 110 are sequentially overlapped into a cylindrical structure along the axial direction. The first ring body 120 is circumferentially disposed at an outer portion between two adjacent elastic rings 110.

In this embodiment, the elastic ring 110 has an annular structure, and the elastic ring 110 is made of an elastic material, so that the elastic ring 110 can be compressed due to its elasticity and can be restored to its original shape after being compressed. The elastic ring 110 is provided with the side wall 114, and the side wall 114 of the elastic ring 110 is arranged in a bending mode, so that the elastic ring 110 can be folded towards the bending convex direction when being extruded, the space of elastic deformation of the elastic ring 110 can be increased, the elastic ring 110 is not easy to damage after being elastically deformed, and the service life of the elastic ring 110 is prolonged. The elastic rings 110 are sequentially overlapped in the axial direction to form a cylindrical structure, so that the structural strength and the buffering time of the buffer device 100 which is elastically deformed after being compressed are improved, and the process of compressing and restoring the buffer device 100 is more stable. The first ring body 120 has an annular structure, and the first ring body 120 can be coaxially disposed with the elastic ring 110. The first ring body 120 is sleeved between two adjacent elastic rings 110, so that after the cushioning device 100 is subjected to compression denaturation, the first ring body 120 can play a role in enhancing the structural strength of the cushioning device 100. In addition, the first ring body 120 protrudes out of the outer wall of the elastic ring 110, so that the first ring body 120 can function as a handrail, and the buffer device 100 can be conveniently taken and placed. The first ring body 120 can be made of an elastic material such that the first ring body has elasticity. The first ring body 120 can be integrally disposed with the elastic ring 110, and is easy to process. When the first ring 120 having elasticity is compressed to generate elastic deformation, the buffering effect of the buffering device 100 can be further improved, so that the compression and recovery processes of the buffering device 100 are more stable.

Example 2

As shown in fig. 2, the present embodiment provides a cushioning device 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the wall thickness of the elastic ring 110 is equal.

In this embodiment, the elastic ring 110 has the same wall thickness, so that the structural strength of the elastic ring 110 can be ensured.

Example 3

As shown in fig. 1 and 2, the present embodiment provides a buffer device 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the elastic ring 110 is convexly curved toward the outside.

In this embodiment, the side wall 114 of the elastic ring 110 is of an arc-shaped structure, that is, the middle of the side wall 114 of the elastic ring 110 protrudes outwards, so that the diameter of the side wall 114 of the elastic ring 110 gradually decreases from the middle to opposite ends, when the elastic ring 110 is compressed and elastically deforms, the middle tends to be folded or folded outwards, the elastic deformation is uniform, and therefore the stability of elastic deformation or restoration of the elastic ring 110 can be improved, and the stability of buffering of the buffering device 100 can be ensured.

Example 4

As shown in fig. 2, the present embodiment provides a cushioning device 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the elastic ring 110 has an outer diameter smaller than that of the first ring body 120.

In this embodiment, the side wall of the elastic ring 110 is outwardly protruded and bent, and the protruded portion of the elastic ring 110 is outwardly expanded by being pressed by the elastic force during the deformation of the elastic ring 110 due to the compression. If the protrusion of the elastic ring 110 protrudes from the first ring body 120, the elastic deformation of the elastic ring 110 is out of balance, thereby causing the cushioning process of the cushioning device 100 to be unstable. Therefore, the outer diameter of the elastic ring 110 is always smaller than that of the first ring body 120, and the smoothness of the cushioning device 100 during compression or recovery can be ensured.

Example 5

As shown in fig. 1, the present embodiment provides a cushioning device 100. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the elastic ring 110 is made of thermoplastic polyester elastic ring.

In this example, the thermoplastic polyester elastomer ring is abbreviated as TPEE. TPEE is a block copolymer containing polyester hard segments and polyether soft segments. TPEE has the elasticity of rubber and the strength of engineering plastics, wherein polyether soft segments give it elasticity making it like rubber and polyester hard segments give it processability making it like plastics. Thermoplastic polyester elastomeric rings have better processability and longer service life than rubber. Compared with engineering plastics, the thermoplastic polyester elastic ring has the same characteristic of high strength, and has better flexibility and dynamic mechanical property. The thermoplastic polyester elastic ring is used as the material of the elastic ring 110, so that the elasticity and the structural strength of the elastic ring 110 in the compression process or the recovery process can be ensured, and the stability of the buffer device 100 in the use process can be ensured.

Example 6

As shown in fig. 2 and 3, the present embodiment provides a shock absorbing device 10, the shock absorbing device 10 including: the hydraulic cylinder 200, the shell 300, the fixing seat 400 and the buffer device 100 in any embodiment, wherein the hydraulic cylinder 200 comprises a cylinder barrel 210. The housing 300 is disposed outside the cylinder 210, and an annular cavity 310 is formed between the housing 300 and the cylinder 210. The fixing seat 400 is annularly disposed outside the cylinder 210, and the fixing seat 400 is located in the annular cavity 310. The buffer device 100 is sleeved outside the cylinder 210, the buffer device 100 is in clearance fit with the cylinder 210, and the buffer device 100 is connected with the fixing seat 400.

In this embodiment, the shock absorbing device 10 may be a suspension cylinder, which may be applied to a vehicle, such as a mining articulated dump truck. The suspension cylinders support the wheels and axles from the frame and function to absorb oscillatory shock caused by the vehicle traveling over rough terrain. The hydraulic cylinder 200 may be an oil cylinder, and the hydraulic cylinder 200 includes a cylinder barrel 210, a piston, and a piston rod. Oil and compressed nitrogen gas are injected into the inside of the cylinder 210. When the wheels bump, the piston rod is stressed and compressed into the cylinder barrel 210, the piston rod moves to compress nitrogen in the cylinder, and oil pressure enables oil to fill a gap between the piston rod and a support of the cylinder barrel 210. The cylinder 210 is located within the housing 300 such that an annular cavity 310 is formed between the housing 300 and the cylinder 210. The annular chamber 310 is filled with oil.

The damper device 100 is fitted to the cylinder 210. The fixing seat 400 is annularly arranged outside the cylinder barrel 210, and the fixing seat 400 can be fixedly connected with the outer wall of the cylinder barrel 210 through a welding process, so that one end of the buffer device 100 sleeved outside the cylinder barrel 210 can be fixedly connected with the fixing seat 400. The shock absorber 100 is in clearance fit with the cylinder 210, so that the shock absorber 100 can be compressed or restored along the outer wall of the cylinder 210 under the action of elastic force, and the shock absorber 10 is limited. By providing different numbers of elastic rings 110, the compression time of the cushioning device 100 can be controlled, so that the cushioning device can quickly intervene when being impacted to reduce the impact, and then the impact when the tire jumps down is reduced. Together with the inherent compression characteristics of the TPEE material, ride comfort and stability can be adjusted.

In addition, the shock absorbing device 10 provided according to the embodiment of the invention includes the shock absorbing device 100 according to any embodiment of the invention, and thus has all the advantageous effects of the shock absorbing device 100 according to any embodiment of the invention.

Example 7

As shown in fig. 2, the present embodiment provides a shock-absorbing device 10. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

elastomeric ring 110 is circumferentially provided with a plurality of drain holes 112.

In this embodiment, a gap is formed between the damping device 100 and the inner wall of the housing 300. The damping device 100 is located within the annular cavity 310 such that the resilient ring 110 separates an inner cavity 312 and an outer cavity 314 within the annular cavity 310 due to the curved disposition of the side walls 114 of the resilient ring 110. The inner cavity 312 is defined by the elastic ring 110 and the outer surface of the cylinder 210. Drain holes 112 are formed in side wall 114 of elastomeric ring 110, drain holes 112 are radially disposed, and drain holes 112 extend through inner cavity 312 and outer cavity 314. The shock absorbing device 10 reciprocates up and down and the shock absorbing device 100 is compressed or restored. Due to the incompressible nature of hydraulic oil, when the suspension is tripped, the damping device 100 is compressed and the oil in the inner chamber 312 flows through the drain hole 112 into the outer chamber 314. When oil flows into outer cavity 314 from inner cavity 312 through drain holes 112, drain holes 112 damp, and the damping value is different according to the number of drain holes 112, so that different requirements of riding comfort can be met by arranging different drain holes 112.

Example 8

As shown in fig. 2, the present embodiment provides a shock-absorbing device 10. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the damper 100 is clearance fit with the cylinder 210.

In this embodiment, the damping device 100 is in clearance fit with the cylinder 210, so that the damping device 100 has a tendency of sliding axially along the cylinder 210, the damping device 100 can be compressed or restored along the outer wall of the cylinder 210 under the action of elastic force, and the cylinder 210 plays a role in guiding the damping device 100, thereby ensuring the stability and the stationarity of the damping device 100 in the compression or restoration process.

Example 9

As shown in fig. 2, the present embodiment provides a shock-absorbing device 10. In addition to the technical features of the above embodiment, the present embodiment further includes the following technical features:

the damper device 100 further includes: the second ring 130, the second ring 130 is annularly disposed outside an end of the cylindrical structure away from the fixing base 400.

In this embodiment, the second ring 130 and the elastic ring 110 may be integrally formed, and the structure is simple and reliable. The second ring body 130 is arranged at one end of the buffering device 100 far away from the fixing seat 400, when the buffering device 100 is compressed, the second ring body 130 is compressed first, so that the compression force is prevented from being directly acted on the elastic ring 110, the second ring body 130 can play a role in slowing down the compression, and the structural strength of the whole structure of the buffering device 100 can be improved.

The damping device 100 may further include a third ring member 140 at an end close to the fixing base 400, and the third ring member 140, the second ring member 130 and the first ring member 120 may have the same structure, size and molding manner. The third ring body 140 can also play a role of facilitating connection with the holder 400.

Example 10

As shown in fig. 4, the present embodiment provides a work apparatus 1 including: a cab 20; in the damper device 10 according to any of the embodiments, the damper device 10 is provided in the cab 20.

In this embodiment, the operation device may be a mining articulated dump truck. The working equipment 1 provided according to the embodiment of the invention includes the shock absorbing device 100 according to any of the embodiments of the invention, and therefore has all the advantageous effects of the shock absorbing device 100 according to any of the embodiments of the invention.

Example 11

As shown in fig. 1 and 2, the present embodiment provides a shock absorbing device 100 and a shock absorbing device 10. The damping device 100 may be applied to the inside of the suspension cylinder, and the damping device 100 may replace a stopper in the related art. The damping device 100 has a plurality of sections, the number of the sections can be selected according to the space of the suspension cylinder, meanwhile, each section is provided with a plurality of discharge holes 112, and the damping device 100 with different numbers of the discharge holes 112 can be selected according to the adjustment requirement. The buffer device 100 is sleeved on the cylinder barrel 210 and in clearance fit, the fixing seat 400 is welded on the cylinder barrel 210, the buffer device 100 is positioned by the fixing seat 400, the cylinder barrel 210 moves up and down in a reciprocating motion along with the suspension cylinder in the suspension cylinder body, and the buffer device 100 is compressed and restored. Due to the incompressible nature of hydraulic oil, when the suspension cylinder jumps down, the damping device 100 is compressed and the oil in the inner chamber 312 flows through the drain holes 112 into the outer chamber 314, which produces damping, and the damping value will also be different depending on the number of drain holes 112, and by selecting a damping device 100 with a different number of drain holes 112, a selected fine tuning of ride comfort can be achieved. By selecting the number of sections on cushioning device 100, the time that cushioning device 100 is compressed can be controlled, and the comfort and stability of ride can be adjusted by the inherent compression characteristics of the TPEE material. The elastic ring 110 needs to ensure that the folded position does not exceed the maximum outer diameter of the cushioning device 100 when compressed.

In summary, the beneficial effects of the embodiment according to the invention are as follows:

1. the plurality of elastic rings 110 are overlapped to form a cylindrical structure, so that the buffer device 100 can be timely involved in the steering process to improve the anti-roll performance, and the stability of riding is ensured.

2. Through the material characteristics of the elastic ring 110 and the vent hole 112, the damping force can be increased, the impact can be reduced, and the driving comfort can be ensured.

In embodiments according to the present invention, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments according to the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, only for convenience of description and simplification of description of the embodiments according to the present invention, and do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments according to the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment according to the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment according to the present invention, and is not intended to limit the embodiment according to the present invention, and various modifications and variations may be made to the embodiment according to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment according to the present invention should be included in the protection scope of the embodiment according to the present invention.

Claims (10)

1. A cushioning device, comprising:

the elastic rings are arranged in a bending mode and are sequentially overlapped into a cylindrical structure along the axial direction;

and the first ring body is annularly arranged outside the cylindrical structure, and the first ring body is positioned between the two adjacent elastic rings.

2. A fender according to claim 1 wherein the resilient ring has an equal wall thickness.

3. A fender according to claim 1 wherein the resilient ring has side walls which are curved convexly towards the exterior.

4. The cushioning device of claim 1, wherein the outer diameter of the elastomeric ring is smaller than the outer diameter of the first ring body.

5. A fender according to any one of claims 1 to 4 wherein the resilient ring is of thermoplastic polyester.

6. A shock absorbing device, comprising:

a hydraulic cylinder including a cylinder tube;

the outer shell is arranged outside the cylinder barrel, and an annular cavity is formed between the outer shell and the cylinder barrel;

the fixing seat is annularly arranged outside the cylinder barrel and is positioned in the annular cavity;

the buffering device as claimed in any one of claims 1 to 5, wherein the buffering device is sleeved outside the cylinder barrel and is connected with the fixing seat.

7. The apparatus according to claim 6, wherein the elastomeric ring is circumferentially provided with a plurality of drain holes.

8. A shock absorbing device as set forth in claim 6, wherein said shock absorbing device is clearance fitted with said cylinder tube.

9. The cushioning device of claim 6, wherein said cushioning device further comprises:

and the second ring body is annularly arranged outside one end of the cylindrical structure, which is far away from the fixed seat.

10. A work apparatus, characterized in that the work apparatus comprises:

a cab;

a shock absorbing device as claimed in any one of claims 6 to 9, provided on the cab.

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