CN114321247A

CN114321247A - Shock-absorbing device

Info

Publication number: CN114321247A
Application number: CN202111667841.4A
Authority: CN
Inventors: 张福清
Original assignee: Apollo Zhilian Beijing Technology Co Ltd
Current assignee: Apollo Zhilian Beijing Technology Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-04-12

Abstract

The disclosure relates to a damping device, and relates to the technical field of damping. This damping device includes: the device comprises a first connecting body, a second connecting body, a spring and at least one group of adjusting bolt assemblies; the first connecting body comprises a first mounting part and a sleeve assembly, and the second connecting body comprises an inserting shaft and a second mounting part; the sleeve assembly is connected to one end, facing the second connecting body, of the first mounting portion, one end of the insertion shaft extends into the sleeve assembly and moves in the sleeve assembly, a limiting plate is arranged at the other end of the insertion shaft, and the second mounting portion is connected to the limiting plate; the sleeve component comprises a mounting edge extending towards the peripheral side of the sleeve component, and the mounting edge is close to the first mounting part; the spring is sleeved outside the sleeve component, and two axial ends of the spring are respectively abutted with the mounting edge and the limiting plate; the adjusting bolt assembly comprises two adjusting bolts which are oppositely arranged in the circumferential direction of the installation edge, and the adjusting bolts are spirally penetrated through the installation edge. Damping device can accurate regulation damping frequency, and adaptability and matching nature are good, and the shock attenuation is effectual.

Description

Shock-absorbing device

Technical Field

The present disclosure relates to the field of damping technology, and in particular, to a damping device.

Background

In automobiles, a shock absorbing device is generally provided to reduce pressure or impact applied to parts of the automobile, to prevent the parts from being damaged, or to improve comfort of riding in the automobile.

Taking the engine damping device of an automobile as an example, the existing damping device generally comprises a base, a casing, a damping plate and a spring, wherein the base is connected to the frame, the movable sleeve of the casing is arranged on the base, the damping plate is fixedly connected to one side of the casing, which is far away from the base, and the damping plate is connected with the engine, and the spring is connected between the inner top wall of the casing and the end surface of the base. An adjustable buffering space is formed between the casing and the base, when the automobile is stressed by pressure or impact force, the spring between the casing and the base is compressed to provide certain elastic force, and the aim of buffering vibration is fulfilled

However, the existing damping device has the defects of incapability of adjusting damping frequency, poor adaptability and matching property and poor damping effect.

Disclosure of Invention

The utility model provides a damping device can accurate regulation damping frequency, and adaptability and matching nature are good, and the shock attenuation is effectual.

The present disclosure provides a damping device, comprising: the device comprises a first connecting body, a second connecting body, a spring and at least one group of adjusting bolt assemblies;

the first connecting body comprises a first mounting part and a sleeve assembly, and the second connecting body comprises an inserting shaft and a second mounting part; the sleeve assembly is connected to one end, facing the second connecting body, of the first mounting portion, one end of the insertion shaft extends into the sleeve assembly and moves in the sleeve assembly, a limiting plate is arranged at the other end of the insertion shaft, and the second mounting portion is connected to the limiting plate;

the sleeve component comprises a mounting edge extending towards the peripheral side of the sleeve component, and the mounting edge is close to the first mounting part; the spring is sleeved outside the sleeve component, and two axial ends of the spring are respectively abutted with the mounting edge and the limiting plate; the adjusting bolt assembly comprises two adjusting bolts which are oppositely arranged in the circumferential direction of the installation edge, and the adjusting bolts are spirally penetrated through the installation edge.

The utility model provides a damping device, the second installation department on first installation department on the first connector and the second connector is connected with corresponding mounting structure respectively, and the tip of the grafting axle of being connected with the second installation department stretches into the sleeve subassembly of being connected with first installation department in, establishes the spring through the sleeve subassembly overcoat, and the axial both ends of spring support establish at the sleeve subassembly along with the limiting plate of grafting axle between. The device that produces vibration drives the spiale through the second installation department and removes in sleeve subassembly, and the spacing between the limiting plate on the spiale and sleeve subassembly's installation edge changes thereupon, and the compressive capacity of spring also changes thereupon, and the elastic potential energy that the spring produced between first installation department and second installation department provides the damping force, reaches the shock attenuation effect.

And, through set up adjusting bolt subassembly on the installation edge at sleeve subassembly, under the certain circumstances of interval between first installation department and the second installation department, through the compression capacity of adjusting bolt subassembly adjustable spring, adjust the elastic potential energy between first installation department and the second installation department, the damping force of accurate regulation damping device promotes damping device's shock attenuation effect, strengthens damping device's adaptability and matching nature. Wherein, the adjusting bolt who sets up relatively in the circumference of installing along can guarantee the equilibrium of adjusting bolt subassembly to the effect of spring.

In one possible embodiment, the damping device comprises at least two sets of adjusting bolt assemblies, each adjusting bolt assembly being arranged at intervals along the circumference of the mounting edge.

In one possible embodiment, the adjusting screw is provided with a locking nut.

In one possible embodiment, the locking nut abuts against a side surface of the mounting rim facing away from the spring.

In one possible embodiment, the sleeve assembly includes a sleeve and a retaining sleeve;

the first mounting part is connected with the shaft sleeve, and the end part of the insertion shaft extends into the shaft sleeve; the fixed sleeve is sleeved outside the shaft sleeve, and the mounting edge is arranged at one end of the fixed sleeve facing the first mounting part.

In a possible implementation mode, the outer side wall of the shaft sleeve extends to form a limiting table, and one end, facing the first mounting portion, of the fixing sleeve abuts against the limiting table.

In a possible embodiment, the fixing sleeve extends to a position close to the limiting plate, and a limiting member is disposed on an outer wall of the plug shaft and is configured to abut against an end of the fixing sleeve facing the limiting plate.

In one possible embodiment, an inner wall surface of the fixing sleeve facing the end of the limit plate has a step for abutting against the limit stop.

In one possible embodiment, the stop element is a stop nut screwed onto the outer wall of the plug-in shaft.

In a possible implementation mode, the side wall of the fixing sleeve is provided with air holes at the part extending out of the shaft sleeve.

In a possible embodiment, the side of the mounting edge facing the spring is provided with a flat needle bearing against which the spring rests.

In a possible embodiment, a bearing plate is arranged between the mounting edge and the flat needle roller bearing, and the end of the adjusting bolt passes through the mounting edge and abuts against the bearing plate.

In one possible embodiment, at least one of the first mounting portion and the second mounting portion is provided with a mounting hole.

In one possible embodiment, the first mounting portion and the second mounting portion are each provided with a mounting hole.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

fig. 1 is a schematic structural diagram of a damping device provided in an embodiment of the present disclosure;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

fig. 4 is a schematic diagram of a state change of a damping device according to an embodiment of the present disclosure.

Description of reference numerals:

1-a damping device;

100-a first connector; 200-a second linker; 300-a spring; 400-adjusting the bolt assembly;

110-a first mounting portion; 120-a sleeve assembly; 130-plane needle roller bearing; 140-a pressure bearing plate; 210-a plug-in shaft; 220-a second mounting portion; 410-adjusting bolts;

121-shaft sleeve; 122-a fixation sleeve; 211-limiting plate; 212-a limiter; 411-a locking nut;

1211-limit table; 1221-mounting edge; 1222-a step portion; 1223-air holes; 2111-positioning the boss;

a-a mounting hole; b-an inner liner layer.

Detailed Description

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of the embodiments of the disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

All install damping device in many instruments and the equipment, damping device can reduce the pressure or the impact force that spare part received. For example, a shock absorber provided in an automobile can protect parts of the automobile body from being damaged, and can improve riding comfort. In the equipment that during operations such as fan, air conditioning unit, air compressor, generator and cooling tower can produce the vibration, also can set up damping device usually to avoid causing part fracture, bolt not hard up, sealed revealing, precision variation scheduling problem.

However, prior art damping devices, the damping springs connected between the two mounting structures, can only change the amount of compression as the distance between the two mounting structures changes to provide damping for the vibrations of the two mounting structures. When the interval between two mounting structure is fixed, damping spring's compression degree is certain, and is unable to adjust, and adaptability and matching nature are relatively poor, and the shock attenuation effect is relatively poor.

In view of this, the embodiment of the present disclosure provides a damping device, a first connecting body and a second connecting body are respectively connected to two corresponding mounting structures, the first connecting body is sleeved outside the second connecting body, the first connecting body and the second connecting body can move relative to each other, a spring is sleeved outside the first connecting body for damping, and an adjusting bolt assembly is arranged on the first connecting body, so that the compression degree of the spring can be adjusted under the condition that the distance between the two mounting structures is fixed, further, the damping force of the damping device can be adjusted, and the damping effect of the damping device can be enhanced.

Fig. 1 is a schematic structural diagram of a damping device provided in an embodiment of the present disclosure; FIG. 2 is an exploded view of FIG. 1; FIG. 3 is a cross-sectional view of FIG. 1; fig. 4 is a schematic diagram of a state change of a damping device according to an embodiment of the present disclosure.

Referring to fig. 1 and 2, a shock absorbing device 1 according to the present embodiment is mounted on a structure requiring shock absorption. The damping device 1 comprises a first connecting body 100, a second connecting body 200 and a spring 300, wherein one of the first connecting body 100 and the second connecting body 200 is used for being connected with a structure needing shock absorption, the other one of the first connecting body 100 and the second connecting body 200 is used for being connected with a basic mounting structure of the structure needing shock absorption, the first connecting body 100 and the second connecting body 200 can move relatively, and the spring 300 is abutted between the first connecting body 100 and the second connecting body 200.

When the structure to be damped vibrates, the distance between the structure to be damped and the base mounting structure is changed, the distance between the first connecting body 100 and the second connecting body 200 is changed along with the vibration of the structure to be damped, the compression degree of the spring 300 abutted between the first connecting body and the second connecting body is changed along with the change of the distance, and the damping or the damping is realized through the elastic force generated by the spring 300.

Taking the example of the shock absorbing structure in which the shock absorbing device 1 is applied to an engine, one of the first connecting body 100 and the second connecting body 200 may be connected to the engine and the other may be connected to a vehicle frame, that is, the shock absorbing device 1 is connected between the engine and the vehicle frame. When vibration is generated during the operation of the engine, or when the automobile bumps during the driving process, the distance between the engine and the frame changes, relative movement is generated between the first connecting body 100 and the second connecting body 200, the compression amount of the spring 300 changes along with the movement between the first connecting body 100 and the second connecting body 200, and the spring 300 generates an elastic force opposite to the vibration direction of the engine, so that the damping device 1 generates a damping force to achieve the purpose of damping or absorbing shock.

In other application scenarios, for example, when the damping device 1 is applied to a fan, an air conditioning unit, an air compressor, a generator or a cooling tower, the damping device 1 is installed between a corresponding structure requiring damping and a corresponding base installation structure. Similarly, the damping force generated by the damping device 1 can be used for damping or shock absorption, and is not described herein again.

For a specific application scenario of the damping device 1, one of the first connecting body 100 and the second connecting body 200 may be connected to a fixed structure, while the other is connected to a movable structure, for example, for a damping structure of an automobile engine, one of the first connecting body 100 and the second connecting body 200 is connected to an engine generating vibration, while the other is connected to a frame which is a fixed structure for a vehicle. Alternatively, both the first and

second connection bodies

100 and 200 may be connected to a movable structure. This embodiment does not specifically limit this.

Hereinafter, the shock absorbing device 1 will be described by taking as an example an engine shock absorbing structure of an automobile, specifically, by taking as an example that the first connecting body 100 is connected to a vehicle frame and the second connecting body 200 is connected to an engine.

Referring to fig. 2, the first connection body 100 of the shock absorbing device 1 includes a first mounting portion 110 and a sleeve assembly 120, the first mounting portion 110 is connected to an end of the sleeve assembly 120 away from the second connection body 200, the second connection body 200 includes a plug shaft 210 and a second mounting portion 220, and the second mounting portion 220 is connected to an end of the plug shaft 210 away from the first connection body 100. The first mounting part 110 and the second mounting part 220 are respectively used for being connected with corresponding mounting structures, one of the first mounting part 110 and the second mounting part 220 can be connected with an engine, and the other can be connected with a frame; the plug shaft 210 may extend into the sleeve assembly 120 and move within the sleeve assembly 120.

Wherein the first and second mounting

portions

110 and 220 are provided with corresponding mating structures according to the mounting structures of the first and second mounting

portions

110 and 220. Referring to fig. 2, taking the example that the first mounting portion 110 and the second mounting portion 220 are both connected to the pillar structure, for example, the first mounting portion 110 and the second mounting portion 220 are both mounted on a shaft, the first mounting portion 110 and the second mounting portion 220 may both have mounting holes a, the shaft on the engine passes through the mounting hole a on the first mounting portion 110, and the shaft on the frame passes through the mounting hole a on the second mounting portion 220.

In other embodiments, one of the engine and the frame may be provided with a shaft for mounting the shock absorbing device 1, and the other may be connected to the shock absorbing device 1 in a plane-fixed manner, for example, in which case one of the first mounting portion 110 and the second mounting portion 220 may be provided with a mounting hole a, and the other may be plane-locked to the corresponding mounting structure by a locking member such as a bolt, a screw, or the like. Or, the engine and the frame are both connected to the damping device 1 in a plane fixing manner, at this time, the first mounting portion 110 and the second mounting portion 220 both have a flat mounting plate structure, for example, and both the first mounting portion 110 and the second mounting portion 220 can be locked on the corresponding mounting structures through the locking member plane.

Referring to fig. 2 and 3, the spring 300 is sleeved outside the sleeve assembly 120, a mounting edge 1221 extends from an outer side wall of the sleeve assembly 120, the mounting edge 1221 may be a circular platform extending toward a peripheral side of the sleeve assembly 120, and the mounting edge 1221 is disposed near the first mounting portion 110. In the plugging direction of the first connection body 100 and the second connection body 200, that is, the direction of relative movement between the two, the mounting edge 1221 of the sleeve assembly 120 is opposite, one end of the plugging shaft 210 far away from the first mounting portion 110 is provided with a limiting plate 211, and the second mounting portion 220 is connected to one side of the limiting plate 211 far away from the first mounting portion 110. The spring 300 has both axial ends abutting against the mounting edge 1221 of the sleeve assembly 120 and the stopper plate 211 of the plug shaft 210.

When vibration is generated in the working process of the engine, or when the automobile runs through a rugged road surface, the frame is used as a reference, the engine vibrates relative to the frame, the second connecting body 200 moves along with the vibration of the engine, is sleeved outside the sleeve component 120 and abuts against the mounting edge 1221 of the sleeve component 120 and the spring 300 between the limiting plate 211 of the plug shaft 210, extends and retracts along with the movement of the second connecting body 200, changes the compression amount of the spring, and provides elastic force opposite to the vibration direction of the engine, so that the damping force is provided through the damping device 1, and the aim of damping or absorbing shock for the engine is fulfilled.

For more precisely adjusting the damping frequency of the damping device 1, referring to fig. 2 and fig. 3, the damping device 1 of the present embodiment further includes an adjusting bolt assembly 400, the adjusting bolt assembly 400 includes two adjusting bolts 410 oppositely disposed in the circumferential direction of the mounting edge 1221 of the sleeve assembly 120, a threaded hole (not shown in the figure) is opened on the mounting edge 1221, and the adjusting bolts 410 are spirally inserted into the threaded hole of the mounting edge 1221.

The adjusting bolt 410 penetrates into the threaded hole of the mounting edge 1221 from the side, facing the first mounting portion 110, of the mounting edge 1221, along with the increase of the screwing amount of the adjusting bolt 410, the bottom end of the adjusting bolt 410 is continuously close to the limiting plate 211 of the plug shaft 210, the pressure generated by the adjusting bolt 410 on the spring 300 forces the spring 300 to be compressed continuously, and then the compression amount and the elastic force of the spring 300 can be adjusted to adjust the damping force of the damping device 1.

Wherein, through setting up at least a set of adjusting bolt assembly 400 on installation edge 1221, adjusting bolt assembly 400 includes two adjusting bolts 410 that set up on installation edge 1221 relatively, through adjusting the screw-in amount unanimous of two adjusting bolts 410, can ensure spring 300 atress balanced.

In practical application, for an engine with a large size or a large vibration amplitude, the damping device 1 with a large size and capable of generating a large damping force needs to be matched, at this time, the mounting edge 1221 of the sleeve assembly 120 can be provided with more than two sets of adjusting bolt assemblies 400, the connecting line between two oppositely-arranged adjusting bolts 410 of each set of adjusting bolt assembly 400 extends along the radial direction of the mounting edge 1221, the connecting lines between two oppositely-arranged adjusting bolts 410 of each set of adjusting bolt assembly 400 are mutually crossed, that is, each adjusting bolt 410 is arranged along the circumferential direction of the mounting edge 1221 at intervals, so as to ensure the stability of the adjusting bolt 410 in adjusting the compression amount of the spring 300.

In the present embodiment, by providing the adjusting bolt assembly 400, when the vibration amount of the engine is constant, that is, when the distance between the engine and the frame is constant at a certain time, the distance between the first mounting portion 110 and the second mounting portion 220 is constant, and the compression amount of the spring 300 is constant. At this time, if the damping force generated by the vibration damping device 1 cannot be completely matched with the vibration frequency of the engine, the amount of compression of the spring 300 can be changed by adjusting the screwing amount of the adjusting bolt 410, and further, the damping force generated by the vibration damping device 1 is adjusted to precisely match the vibration frequency of the engine.

Referring to fig. 4(a), when the engine does not vibrate with reference to the first mounting portion 110 connected to the vehicle frame, the initial distance between the first mounting portion 110 and the second mounting portion 220 is a1, and in this state, the bottom end of the adjusting bolt 410 is located in the mounting edge 1221 and does not penetrate through the mounting edge 1221, for example, the bottom end of the adjusting bolt 410 is flush with the surface of the mounting edge 1221 facing the side of the spring 300, and at this time, the initial length of the spring 300 is L1.

Referring to fig. 4(b), when the engine vibrates, the damper device 1 is pressed by the engine, the spring 300 is compressed, the length of the portion of the insertion shaft 210 inserted into the sleeve assembly 120 increases, the second mount part 220 moves toward the first mount part 110 by a certain distance, the distance between the first mount part 110 and the second mount part 220 is shortened to a2, the compression amount of the spring 300 is H, the length of the spring 300 is reduced to L2, and L2 is L1-H.

In this process, the spring 300 is compressed by changing the distance between the first mounting portion 110 and the second mounting portion 220, and the elastic potential energy between the first mounting portion 110 and the second mounting portion 220 is changed, so that the damping force of the damping device 1 is changed.

Referring to fig. 4(c), the adjusting bolt assembly 400 is adjusted to increase the amount of the adjusting bolt 410 screwed in, the adjusting bolt 410 penetrates the mounting edge 1221, and the spring 300 is pushed up and moved, and the spring 300 is compressed again. At this time, the distance between the first mounting portion 110 and the second mounting portion 220 is unchanged, which is still a2, but the spring 300 is further compressed, the amount of compression of the spring 300 is not adjusted by the amount of screwing of the bolt 410, and taking the length of the portion of the adjusting bolt 410 that penetrates through the mounting edge 1221 as an example, the amount of compression of the spring 300 is R, the length of the spring 300 is reduced to L3, and L3 is L1-H-R.

In this process, the spring 300 is compressed by the adjusting bolt 410 without changing the distance between the first and second mounting

portions

110 and 220, and the elastic potential energy between the first and second mounting

portions

110 and 220 is adjusted, thereby achieving the effect of precisely adjusting the damping force of the damping device 1.

For example, the screwing amount of the adjusting bolt 410 and the compression amount of the spring 300 can be adjusted under the condition that the distance between the first mounting portion 110 and the second mounting portion 220 is constant according to the actual vibration frequency of the engine, the elastic potential energy generated between the first mounting portion 110 and the second mounting portion 220 can be adjusted, and then the damping force of the damping device 1 can be accurately adjusted, so that the damping effect of the damping device 1 can be improved, and the adaptability and the matching performance of the damping device 1 can be enhanced.

Referring to fig. 3, upon screwing the adjusting bolt 410 into the mounting rim 1221 of the socket assembly 120, the adjusting bolt assembly 400 may further include a locking nut 411, and the locking nut 411 is screwed on an outer wall of the adjusting bolt 410. On adjusting bolt 410 threaded connection is in the installation along 1221's threaded hole's basis, through set up lock nut 411 on adjusting bolt 410, play dual positioning adjusting bolt 410's effect, can guarantee that adjusting bolt 410 fixes a position accuracy, connection fastening, prevent that adjusting bolt 410 is not hard up, avoid consequently reducing adjusting bolt 410 adjusting spring 300's precision and equilibrium.

For example, the locking nut 411 may abut against a side surface of the mounting edge 1221 of the sleeve assembly 120 facing away from the spring 300, wherein the locking nut 411 may be fixed on the surface of the mounting edge 1221 by welding or bonding, or the position of the locking nut 411 on the adjusting bolt 410 may be adjusted by screwing the locking nut 411 so that the locking nut 411 abuts against the surface of the mounting edge 1221. With the arrangement, the screw connection part of the adjusting bolt 410 and the mounting edge 1221 and the screw connection part of the adjusting bolt 410 and the locking nut 411 have no space, so that the positioning effect on the adjusting bolt 410 is better.

In addition, in the case where the adjusting bolt 410 is screwed with the lock nut 411, the hole provided in the mounting edge 1221 for passing through the adjusting bolt 410 may be a through hole having a smooth inner wall through which only the adjusting bolt 410 passes, instead of a bolt hole. At this time, the adjusting bolt 410 is fixed and limited only by the screw coupling of the locking nut 411 and the adjusting bolt 410.

Referring to fig. 3, as an embodiment, the sleeve assembly 120 may include a sleeve 121 and a fixing sleeve 122. The first mounting portion 110 is connected to the bushing 121, and for example, the first mounting portion 110 may be integrally formed on the bushing 121; the fixing sleeve 122 is sleeved outside the shaft sleeve 121, the mounting edge 1221 extends out of the outer side wall of the fixing sleeve 122, and the mounting edge 1221 may be located at one end of the fixing sleeve 122 facing the first mounting portion 110. The spring 300 is sleeved outside the fixing sleeve 122, and two axial ends of the spring 300 are abutted between the mounting edge 1221 of the fixing sleeve 122 and the limiting plate 211 of the plug shaft 210.

The end of the insertion shaft 210 is inserted into the sleeve 121, and the second connection body 200 moves according to the vibration of the engine when the engine vibrates. The plug shaft 210 moves in the sleeve 121, and the distance between the limit plate 211 of the plug shaft 210 and the mounting edge 1221 of the fixing sleeve 122 changes accordingly. The spring 300, which is fitted around the outside of the fixing cover 122, is compressed as the distance between the stopper plate 211 and the mounting edge 1221 is changed, and elastic potential energy is generated between the first mounting part 110 and the second mounting part 220.

Because the sleeve assembly 120 is formed by sleeving the shaft sleeve 121 and the fixing sleeve 122 inside and outside, in order to prevent the relative displacement between the fixing sleeve 122 and the shaft sleeve 121 and ensure the stability of the sleeve assembly 120, the fixing sleeve 122 can be fixedly connected outside the shaft sleeve 121, for example, the outer wall of the shaft sleeve 121 and the inner wall of the fixing sleeve 122 are welded or bonded, so that the shaft sleeve 121 and the fixing sleeve 122 are fixedly connected into an integral structure.

Since the spring 300 sleeved on the outer wall of the fixing sleeve 122 is in a compressed state, and the elastic force of the spring 300 generates a pressure on the mounting edge 1221 of the fixing sleeve 122, referring to fig. 3, a limiting table 1211 may be designed on the shaft sleeve 121, the limiting table 1211 extends out of the outer wall of the shaft sleeve 121, and one end of the fixing sleeve 122 facing the first mounting portion 110 is abutted against the limiting table 1211 under the action of the spring 300. Thus, the retaining and limiting action of the limiting table 1211 of the shaft sleeve 121 enables the fixing sleeve 122 and the shaft sleeve 121 to be in a relatively fixed state without connecting the shaft sleeve 121 and the fixing sleeve 122.

In some embodiments, the shaft sleeve 121 and the fixing sleeve 122 may also be fixedly connected to form an integral structure on the basis of the limit of the fixing sleeve 122 by the limit stop 1211 of the shaft sleeve 121, which is not limited in this embodiment.

In addition, for the spring 300 sleeved outside the fixing sleeve 122 and having two ends respectively abutting against the mounting edge 1221 of the fixing sleeve 122 and the limiting plate 211 of the insertion shaft 210, in order to ensure the stability of the spring 300 during the operation of the damping device 1, referring to fig. 3, a positioning boss 2111 may be disposed on a surface of the limiting plate 211 of the insertion shaft 210 facing one side of the spring 300, a diameter of the positioning boss 2111 is identical to an outer diameter of the fixing sleeve 122, a size of the spring 300 is matched with the outer diameter of the fixing sleeve 122, and two ends of the spring 300 respectively abut against an outer side wall of the fixing sleeve 122 and an outer side wall of the positioning boss 2111, so as to prevent the spring 300 from being deviated or swayed.

Similar to the force of the spring 300 on the fixing sleeve 122, the spring 300 in the compressed state generates a pressure on the stopper plate 211 of the insertion shaft 210, and thus, there is a risk that the second connection body 200 is detached from the first connection body 100. In order to limit the position of the second connection body 200, referring to fig. 3, the shaft sleeve 121 may cover only an end region of the insertion shaft 210, the shaft sleeve 121 is mainly used for guiding the movement of the insertion shaft 210, the fixing sleeve 122 may extend to be close to the position-limiting plate 211, and a portion of the fixing sleeve 122 outside the shaft sleeve 121 is used for forming a limit structure with the insertion shaft 210.

The limiting member 212 may be sleeved on an outer wall of the plug shaft 210, one end of the fixing sleeve 122 facing the limiting plate 211 of the plug shaft 210 may be matched with the limiting member 212 for limiting, for example, a step portion 1222 may be disposed on an inner wall surface of the fixing sleeve 122 facing the limiting plate 211, when the plug shaft 210 moves to a limit position in a direction away from the first mounting portion 110, the limiting member 212 abuts against the step portion 1222 to limit the plug shaft 210, and the second connecting body 200 is prevented from being disconnected from the first connecting body 100.

To prevent the interference caused by the position-limiting member 212 in assembling the second connecting body 200 with the first connecting body 100 due to the insertion shaft 210 being inserted into the fixing sleeve 122, the position-limiting member 212 may be detachably mounted on the insertion shaft 210. As a specific embodiment, a local area on the outer wall of the plug shaft 210 may be provided with an external thread, and the limiting member 212 sleeved on the outer wall of the plug shaft 210 may be a limiting nut screwed on the outer wall of the plug shaft 210.

Referring to fig. 3, when assembling the damping device 1, the spring 300 is firstly sleeved outside the fixing sleeve 122, and the insertion shaft 210 is inserted into the fixing sleeve 122, so that the two ends of the spring 300 are abutted between the mounting edge 1221 of the fixing sleeve 122 and the limiting plate 211 of the insertion shaft 210. Then, the limit nut is extended into the fixing sleeve 122 from the side of the fixing sleeve 122 far away from the limit plate 211 of the insertion shaft 210, and the limit nut is screwed on the insertion shaft 210. Finally, the sleeve 121 is inserted into the fixing sleeve 122 to complete the assembly of the first connecting body 100 and the second connecting body 200.

In the process of screwing the limit nut on the outer wall of the plug shaft 210, the plug shaft 210 needs to be rotated, before the installation of the spring 300 is completed, one end of the spring 300 abuts against the limit plate 211 of the plug shaft 210, and when the plug shaft 210 is rotated, the end of the spring 300 is driven to rotate together with the plug shaft 210. If the end of the spring 300 rotates and is fixed against the other end of the mounting edge 1221 of the fixing sleeve 122, the spring 300 may be twisted, which may affect the performance of the spring 300, and in a serious case, may even cause the spring 300 to fail.

In order to prevent the spring 300 from twisting, as shown in fig. 3, a flat needle bearing 130 may be disposed at one end of the spring 300 abutting against the mounting edge 1221 of the fixing sleeve 122, that is, the flat needle bearing 130 is disposed at the side of the mounting edge 1221 facing the spring 300, and the spring 300 abuts against the flat needle bearing 130. Thus, when the spring 300 abuts against one end of the stopper plate 211 of the plug shaft 210 and rotates with the plug shaft 210, the spring 300 twists and transmits the twisting force to the other end thereof, the twisting force of the spring 300 acts on the flat needle roller bearing 130, and the flat needle roller bearing 130 can drive the spring 300 to rotate, so that the spring 300 returns to a normal non-twisted state.

The flat needle bearing 130 serves to support the spring 300 in addition to preventing the spring 300 from being twisted, the flat needle bearing 130 is located at an end of the spring 300, the flat needle bearing 130 forms a support end surface, and the adjustment bolt 410 can adjust the compression amount of the spring 300 by pressing the flat needle bearing 130.

Also, as shown in fig. 3, a bearing plate 140 may be further provided between the mounting edge 1221 of the fixing sleeve 122 and the flat needle bearing 130, and the flat needle bearing 130 is located between the end of the spring 300 and the bearing plate 140.

On one hand, the stability of the spring 300 can be enhanced by stacking the flat needle bearing 130 and the bearing plate 140 on the end of the spring 300 in sequence, the end of the adjusting bolt 410 abuts against the bearing plate 140 after passing through the fixing sleeve 122, the acting force of the adjusting bolt 410 acts on the spring 300 through the bearing plate 140 and the flat needle bearing 130, and the bearing plate 140 and the flat needle bearing 130 can enable the acting force to be transmitted to the spring 300 in a balanced manner.

On the other hand, the acting force of the adjusting bolt 410 directly acts on the bearing plate 140, so that the adjusting bolt 410 is prevented from directly acting pressure on the plane needle roller bearing 130, the bearing plate 140 can uniformly transmit the acting force to the plane needle roller bearing 130, the local concentrated stress of the plane needle roller bearing 130 is avoided, the plane needle roller bearing 130 is prevented from being damaged under the long-term action, and the precision of the plane needle roller bearing 130 is ensured. The bearing plate 140 may be made of a material with high strength and rigidity, and has a strong bearing capacity, and the acting force of the adjusting bolt 410 does not affect the bearing plate 140.

In addition, since a gap between the insertion shaft 210 and the fixing cover 122 must be avoided, air is trapped in the gap, and the air pressure in the fixing cover 122 hinders the movement of the insertion shaft 210. In order to prevent the pressure inside the fixing sleeve 122 from affecting the movement of the insertion shaft 210, referring to fig. 3, in this embodiment, a ventilation hole 1223 is formed in a portion of the side wall of the fixing sleeve 122 that extends out of the shaft sleeve 121, the ventilation hole 1223 communicates the inside of the fixing sleeve 122 with the outside, and the ventilation hole 1223 balances the air pressure inside the fixing sleeve 122 to ensure that the insertion shaft 210 can smoothly move inside the fixing sleeve 122.

Referring to fig. 2 and 3, taking the example that the first mounting portion 110 and the second mounting portion 220 are both used for mounting on a shaft, the first mounting portion 110 and the second mounting portion 220 each have a mounting hole a. In the operation of the damping device 1, friction is inevitably generated between the mounting hole a of the first mounting portion 110 and the corresponding mounting structure and between the mounting hole a of the second mounting portion 220 and the corresponding mounting structure, and when the inserting shaft 210 moves, friction is also generated between the end of the inserting shaft 210 and the inner wall of the shaft sleeve 121 and between the outer wall of the inserting shaft 210 and the step 1222 of the inner wall of the fixing sleeve 122.

In this embodiment, the inner liners b may be disposed in the mounting hole a of the first mounting portion 110, the mounting hole a of the second mounting portion 220, the portion of the inner wall of the shaft sleeve 121 that is easily contacted with the plug shaft 210, and the surface of the step 1222 of the fixing sleeve 122, and the inner liners b may be smooth and wear-resistant structural layers, such as copper layers or stainless steel layers, and the inner liners b may reduce friction resistance between corresponding structures, ensure smooth operation of the damping device 1, reduce wear of the corresponding structures, and prolong the service life of the damping device 1.

The above detailed description should not be construed as limiting the scope of the disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure should be included in the scope of protection of the present disclosure.

Claims

1. A shock absorbing device, comprising: the connecting structure comprises a first connecting body (100), a second connecting body (200), a spring (300) and at least one group of adjusting bolt assemblies (400);

the first connecting body (100) comprises a first mounting part (110) and a sleeve component (120), and the second connecting body (200) comprises a plug shaft (210) and a second mounting part (220); the sleeve assembly (120) is connected to one end, facing the second connecting body (200), of the first mounting portion (110), one end of the insertion shaft (210) extends into the sleeve assembly (120) and moves in the sleeve assembly (120), a limiting plate (211) is arranged at the other end of the insertion shaft (210), and the second mounting portion (220) is connected to the limiting plate (211);

the sleeve assembly (120) comprises a mounting edge (1221) protruding towards the peripheral side of the sleeve assembly, and the mounting edge (1221) is close to the first mounting part (110); the spring (300) is sleeved outside the sleeve component (120), and two axial ends of the spring (300) are respectively abutted against the mounting edge (1221) and the limiting plate (211);

the adjusting bolt assembly (400) comprises two adjusting bolts (410) which are oppositely arranged in the circumferential direction of the mounting edge (1221), and the adjusting bolts (410) are spirally arranged on the mounting edge (1221).

2. The shock absorbing device as set forth in claim 1, comprising at least two sets of said adjusting bolt assemblies (400), each of said adjusting bolts (410) being spaced circumferentially along said mounting rim (1221).

3. A shock absorbing device as claimed in claim 1, wherein said adjusting bolt (410) is fitted with a locking nut (411).

4. A shock absorbing device as claimed in claim 3, wherein said lock nut (411) abuts against a side surface of said mounting rim (1221) facing away from said spring (300).

5. A shock absorbing device as claimed in any one of claims 1 to 4, wherein said sleeve assembly (120) comprises a sleeve (121) and a sleeve (122);

the first mounting part (110) is connected to the shaft sleeve (121), and the end part of the insertion shaft (210) extends into the shaft sleeve (121); fixed cover (122) cover is established outside axle sleeve (121), the installation is followed (1221) and is located the orientation of fixed cover (122) the one end of first installation department (110).

6. The shock absorbing device as claimed in claim 5, wherein a stop (1211) extends from an outer side wall of the sleeve (121), and an end of the fixing sleeve (122) facing the first mounting portion (110) abuts against the stop (1211).

7. The shock absorbing device as claimed in claim 5, wherein said fixing sleeve (122) extends to be close to said limit plate (211), a stopper (212) is provided on an outer wall of said plug shaft (210), said stopper (212) is configured to abut against an end of said fixing sleeve (122) facing said limit plate (211).

8. The shock absorbing device as claimed in claim 7, wherein an inner wall surface of the fixing sleeve (122) facing one end of the limit plate (211) has a step portion (1222), the step portion (1222) being for abutting against the limit piece (212).

9. The shock absorbing device as claimed in claim 7, wherein the retainer (212) is a retainer nut screwed onto an outer wall of the plug shaft (210).

10. The shock absorbing device as claimed in claim 7, wherein the side wall of the fixing sleeve (122) is provided with ventilation holes (1223) at a portion thereof extending out of the boss (121).

11. A shock absorbing device as claimed in any one of claims 1 to 4, characterized in that the mounting edge (1221) is provided with a planar needle bearing (130) on the side facing the spring (300), the spring (300) resting against the planar needle bearing (130).

12. The shock-absorbing device as claimed in claim 11, wherein a bearing plate (140) is provided between the mounting rim (1221) and the needle roller bearing (130), and the end of the adjusting bolt (410) passes through the mounting rim (1221) to abut against the bearing plate (140).

13. A shock absorbing device according to any one of claims 1-4, characterized in that at least one of the first mounting portion (110) and the second mounting portion (220) is provided with a mounting hole (a).

14. The damping device according to claim 13, characterized in that the first mounting portion (110) and the second mounting portion (220) are each provided with the mounting hole (a).