CN216428396U

CN216428396U - Anti-axial-movement damping mechanism and excavator

Info

Publication number: CN216428396U
Application number: CN202122961676.5U
Authority: CN
Inventors: 史光程; 张策; 周威; 崔相义; 李鑫鑫
Original assignee: Xuzhou XCMG Excavator Machinery Co Ltd
Current assignee: Xuzhou XCMG Excavator Machinery Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-03
Anticipated expiration: 2031-11-30

Abstract

The utility model discloses a damping mechanism for preventing axial movement and an excavator, which comprises a cab bracket, a turntable bracket, a damping block, an axial limiting part, a rotating part and a pin shaft; the cab supports are two in number and are symmetrically arranged on the cab bottom plate at intervals; the rotary table support is placed between the two cab supports; the damping block is arranged in the rotary table support to realize the radial compression damping function; the axial limiting component is arranged on the turntable support and is used for axially limiting the damping block; the rotating component is arranged on the cab bracket and can realize the rotation between the cab bracket and the turntable bracket; the pin shaft is used for connecting the cab support, the rotating component, the axial limiting component, the damping block and the turntable support. The utility model discloses eliminate because the excavator work vibrations lead to the abnormal sound that driver's cabin and revolving stage collision arouse and prevent that rubber friction is impaired.

Description

Anti-axial-movement damping mechanism and excavator

Technical Field

The utility model relates to an engineering machine tool field, in particular to prevent axial displacement's damper.

Background

Due to the compact structure of excavators, especially mini-excavators, many elements are arranged under the cab, and the cab needs to be removed or designed to be reversible when repairing or replacing the elements. Two supporting legs of the turnable cab are designed to be axially horizontal, the two supporting legs need to wind the axis of the damping block during turning, and the excavator works by means of radial elastic compression of the damping block to realize a damping function. The major structure of snubber block is rubber, and structural strength is lower, and work vibrations friction can reduce operating life by a wide margin, therefore the snubber block need be designed into a structure that can protect rubber. Meanwhile, the vibration of the excavator during working can cause the shock absorption block to move in a serial mode along the axial direction, so that the collision abnormal sound of a cab and a rotary table is caused, and a mechanism for preventing the shock absorption block from moving in the axial direction and not influencing the radial compression of the shock absorption block is needed to solve the problem.

SUMMERY OF THE UTILITY MODEL

According to the not enough of prior art, the utility model provides a prevent axial displacement's damper. The damping block of the mechanism is designed into the inner and outer metal rings, the middle part is damping rubber, the metal inner and outer rings are limited under the condition that the radial compression damping function of the damping block is not influenced, the axial movement of the metal inner and outer rings is prevented, and the problem of abnormal vibration is solved.

The utility model discloses realize according to following technical scheme:

the utility model discloses a damping mechanism for preventing axial movement, which comprises a cab bracket, a turntable bracket, a damping block, an axial limiting part, a rotating part and a pin shaft; the cab brackets are two in number, are symmetrically arranged on the cab bottom plate at intervals; the rotary table support is placed between the two cab supports; the damping block is arranged in the rotary table support to realize the radial compression damping function; the axial limiting component is arranged on the turntable support and is used for axially limiting the damping block; the rotating component is arranged on the cab bracket and can realize the rotation between the cab bracket and the turntable bracket; the pin shaft is used for connecting the cab support, the rotating component, the axial limiting component, the damping block and the turntable support.

Further scheme: the rotary table support is formed by welding a rotary table support vertical plate and a rotary table support sleeve.

Further scheme: the axial limiting part is a check ring for a hole; a step is processed on one side inside the turntable support sleeve, and a groove for placing a check ring for a hole is formed on the other side of the turntable support sleeve; one side of the damping block is abutted to the step, and the other side of the damping block is blocked by a check ring for a hole.

Further scheme: the damping block is formed by vulcanizing and bonding an outer ring of the damping block made of metal, rubber of the damping block and an inner ring of the damping block made of metal.

The axial length of the inner ring of the damping block is greater than that of the rubber of the damping block and the outer ring of the damping block, so that two ends of the inner ring of the damping block are of a convex structure.

The axial limiting rotating part comprises a deep groove ball bearing and a sleeve; a groove is formed in one side of the sleeve, an outer ring of the ball bearing is mounted with the groove in an interference fit mode, and one side of an inner ring of the ball bearing abuts against the damping block; the sleeve is connected with the cab legs.

As the utility model discloses an optimization scheme: and a rubber pad is arranged between the sleeve and the cab bracket.

As the utility model discloses an optimization scheme: and a plurality of graphite lubricating points are processed on the contact surface between the inner part of the sleeve and the pin shaft.

Further scheme: the cab support is provided with a threaded hole, the sleeve is provided with a through hole, and the sleeve is fixed on the cab support through a screw.

The utility model also discloses an excavator, including driver's cabin and revolving stage, the front side of driver's cabin is connected with preventing axial displacement's radial damper and revolving stage front side through foretell driver's cabin of can overturning.

The utility model discloses beneficial effect:

(1) the utility model eliminates abnormal sound caused by collision between the cab and the rotary table due to the work vibration of the excavator;

(2) the inside and outside of the rubber of the damping block are protected by metal, so that the rubber can be prevented from being damaged by friction.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In the drawings:

FIG. 1 is an assembly view of the anti-axial movement damping mechanism of the present invention;

the attached drawings are as follows: 1-cab support, 3-pin shaft, 4-turntable support and 9-tail cab mounting seat.

FIG. 2 is a cross-sectional view of the anti-axial movement damping mechanism of the present invention;

the attached drawings are as follows: 1-cab support, 2-split pin, 3-pin shaft, 4-turntable support, 5-cab bottom plate, 6-shock absorption block, 7-rubber pad, 8-hole retainer ring, 10-screw, 11-sleeve and 12-deep groove ball bearing.

FIG. 3 is an exploded view of the anti-axial movement shock absorbing mechanism of the present invention;

FIG. 4 is a structural diagram of the damper block of the present invention (a is an axonometric view, and b is a sectional view);

the attached drawings are as follows: 6-1 damping block outer ring 6-2 damping block rubber 6-3 damping block inner ring.

Fig. 5 is a structural view of a turntable support of the present invention (a is an axonometric view, and b is a sectional view);

the attached drawings are as follows: 4-1 vertical plate of the turntable support and 4-2 turntable support sleeves.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the utility model discloses an excavator, including driver's cabin and revolving stage (the upper portion support of excavator, through slewing bearing and chassis connection, all the other spare parts equipartitions of excavator are put on above), the driver's cabin is fixed on the revolving stage by four points, and wherein two bilateral symmetry distribute and penetrate fixedly from top to bottom at the afterbody driver's cabin mount pad 9 of driver's cabin rear side with the bolt. The other two hinge structures are formed by a cab support 1, a pin shaft 3 and a turntable support 4, are positioned on the front side of the turntable and are distributed symmetrically left and right relative to the cab.

Foretell hinge structure does the utility model discloses a again disclose a prevent axial displacement's damper, its concrete structure is as shown in fig. 2, fig. 3, and two welding of driver's cabin support 1 are on driver's cabin bottom plate 5, and revolving stage support 4 is placed in the middle of two driver's cabin supports 1. The pin shaft 3 respectively penetrates through the cab bracket 1, the sleeve 11, the deep groove ball bearing 12, the hole check ring 8, the shock absorption block 6, the deep groove ball bearing 12 and the sleeve 11 from right to left, and the cotter pin 2 penetrates into a hole of the pin shaft 3 to prevent the pin shaft 3 from axially moving and falling off.

A preferred embodiment of the above embodiment with respect to the turntable support is given below:

as shown in fig. 5, the turntable support 4 is formed by welding a turntable support vertical plate 4-1 and a turntable support sleeve 4-2, a step is processed on the right side inside the turntable support sleeve 4-2, and a groove for placing a hole retainer ring 8 is formed on the left side.

The following is a preferred embodiment of the above embodiment with respect to the damper block:

as shown in FIG. 4, the damper block 6 is formed by vulcanizing and bonding an outer ring 6-1 of the damper block, rubber 6-2 of the damper block and an inner ring 6-3 of the damper block. The outer ring 6-1 and the inner ring 6-3 of the damping block are made of metal, and the rubber 6-2 of the damping block is placed in the middle to play a role in protection. The inner ring 6-3 of the damper is greater in axial length than the damper rubber 6-2, so that both ends protrude out of the surface.

With continued reference to figure 2, the pin 3 passes through the inner ring 6-3 of the damper block. The right side of the outer ring 6-1 of the damping block abuts against the step on the right side in the rotary table support sleeve 4-2, and the left side is blocked by a retainer ring 8, so that the damping block 6 is prevented from moving axially.

A preferred embodiment of the above embodiment is given below in relation to a sleeve and deep groove ball bearing:

one side of the sleeve 11 is provided with a groove, and the outer ring of the deep groove ball bearing 12 is arranged in the groove in an interference fit mode with the groove, so that the outer ring of the bearing is fixed with the sleeve 11. The bearing inner ring is not contacted with the sleeve 11, and one side of the bearing inner ring is propped against the end face of the inner ring 6-3 of the damping block.

As the utility model discloses an optimization scheme: the inside of

cover

11 and 3 contact surfaces processing of round pin axle have a plurality of even graphite lubrication points, can realize self-lubricating function, guarantee that cover 11 and round pin axle 3 rotate smoothly relatively.

As shown in fig. 3, the cab legs 1 have screw holes, and two sleeves 11 are fixed to the left and right cab legs 1 with screws 10, respectively. A rubber pad 7 is arranged between the sleeve 11 and the cab support 1, the rubber pad 7 has elasticity and can be selected in various thickness specifications, the rubber pad 7 can be compressed by screwing the screw 10, and the bearing inner ring and the damping block inner ring 6-3 can be fixed in a tight contact mode.

As can be seen from the above, the parts of the structure are in close contact with each other in the axial direction without gaps, and the damping block 6 is limited to move axially, so that the effect of preventing the axial movement of the parts is realized, and abnormal sound caused by the left and right shaking of the cab bracket 1 due to the vibration of the excavator during working is eliminated. The outer ring of the deep groove ball bearing 12 is fixed with the sleeve 11 in an interference fit mode, the inner ring of the deep groove ball bearing 12 is fixed with the damping block 6 in an abutting mode, and smooth action can be achieved when the cab is overturned due to the rotation of the deep groove ball bearing 12.

It should be noted that, if the outer ring of the damper block and the inner hole of the turntable support use the interference fit theory, the function of limiting the axial movement of the damper block to a certain extent can be realized, but in practical application, the outer ring is limited by space, and is thin in thickness, so that the outer ring is easily deformed and damaged when being pressed in. And due to aging and vibration, the structure is easy to lose efficacy after a long time, axial movement is caused, and the reliability is low.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Furthermore, those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make modifications or changes to equivalent embodiments by utilizing the above technical contents without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical matters of the present invention are within the scope of the present invention.

Claims

1. An anti-axial movement shock absorbing mechanism, comprising:

the cab supports are symmetrically arranged on the cab bottom plate at intervals;

a turntable support placed between the two cab supports;

the damping block is arranged in the rotary table support and realizes a radial compression damping function;

the axial limiting component is arranged on the rotary table bracket and is used for axially limiting the damping block;

a rotating member mounted on the cab bracket and capable of rotating between the cab bracket and the turntable bracket;

and the pin shaft is used for connecting the cab support, the rotating part, the axial limiting part, the damping block and the turntable support.

2. An anti-axial movement shock absorbing mechanism as claimed in claim 1, wherein:

the rotary table support is formed by welding a rotary table support vertical plate and a rotary table support sleeve.

3. An anti-axial movement shock absorbing mechanism as claimed in claim 2, wherein:

the axial limiting part is a check ring for a hole;

a step is processed on one side inside the turntable support sleeve, and a groove for placing a check ring for a hole is formed on the other side of the turntable support sleeve;

one side of the damping block is abutted to the step, and the other side of the damping block is blocked by a check ring for a hole.

4. An anti-axial movement shock absorbing mechanism as claimed in claim 1, wherein:

the damping block is formed by vulcanizing and bonding an outer ring of the damping block made of a metal material, rubber of the damping block and an inner ring of the damping block made of a metal material.

5. An anti-axial movement shock absorbing mechanism as claimed in claim 4, wherein:

6. An anti-axial movement shock absorbing mechanism as claimed in claim 1, wherein:

the axial limiting rotating part comprises a deep groove ball bearing and a sleeve;

a groove is formed in one side of the sleeve, an outer ring of the ball bearing is mounted with the groove in an interference fit mode, and one side of an inner ring of the ball bearing abuts against the damping block;

the sleeve is connected with the cab legs.

7. An anti-axial movement shock absorbing mechanism as claimed in claim 6, wherein:

and a rubber pad is arranged between the sleeve and the cab bracket.

8. An anti-axial movement shock absorbing mechanism as claimed in claim 6, wherein:

and a plurality of graphite lubricating points are processed on the contact surface between the inner part of the sleeve and the pin shaft.

9. An anti-axial movement shock absorbing mechanism as claimed in claim 6, wherein:

the cab support is provided with a threaded hole, the sleeve is provided with a through hole, and the sleeve is fixed on the cab support through a screw.

10. An excavator comprises a cab and a rotary table, and is characterized in that:

the front side of the cab is connected with the front side of the turntable by a damping mechanism for preventing axial movement according to any one of claims 1 to 9.