CN220789893U

CN220789893U - Excavator hinge mechanism

Info

Publication number: CN220789893U
Application number: CN202322576968.6U
Authority: CN
Inventors: 张洪; 高�浩; 寇煜
Original assignee: Zoomlion Earth Moving Machinery Co Ltd; Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
Current assignee: Zoomlion Earth Moving Machinery Co Ltd; Shaanxi Zoomlion West Earthmoving Machinery Co Ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-16
Anticipated expiration: 2033-09-21

Abstract

The application relates to the excavator field discloses an excavator hinge mechanism, include: the first rocker arm, the connecting rod, the second rocker arm and the pin shaft penetrating and connecting the first rocker arm, the connecting rod, the second rocker arm and the pin shaft; the first limiting structure comprises a baffle ring and a first bolt, the baffle ring is coaxially butted with the axial outer end of the first rocker arm hinge part, the first bolt axially penetrates through the baffle ring and the first shaft end part, and the baffle ring is limited between the head part of the first bolt and the first shaft end part; and the second limiting structure comprises a limiting plate arranged at the end part of the second shaft, and the limiting plate is in limiting abutting connection with the outer end of the second rocker arm hinge part in the axial direction. Therefore, the risk of loosening and deformation of the pin shaft can be effectively reduced, the maintenance period can be effectively prolonged, the maintenance cost can be reduced, and the connection stability and reliability of the connecting rod and the rocker arm can be effectively improved.

Description

Excavator hinge mechanism

Technical Field

The application belongs to the technical field of excavators, and particularly relates to an excavator hinge mechanism.

Background

The bucket is an important component of the excavator working device and is connected to the bucket rod through structural members such as a connecting rod, a rocker arm and the like to work, and the change of the connection mode at the connecting rod is of great significance to the bucket work. For example, one common way of connecting the connecting rod and rocker arm is: the connecting rod is connected with the rocker arm through a pin shaft in a penetrating way, the end part of the pin shaft is sleeved with a baffle ring, the baffle ring is fixed with the arm surface of the rocker arm, the baffle ring is connected with the end part of the pin shaft through a bolt component in a penetrating way perpendicular to the axis of the pin shaft, and when the rocker arm is in operation, the rocker arm is fixed with the pin shaft relatively, and the connecting rod can rotate around the pin shaft.

The penetrating mode of the bolt assembly can realize effective connection of the connecting rod and the rocker arm, but the shearing stress borne by the bolt is too large, so that the bolt is easy to damage in industrial application or easy to fall off after long-time work, the pin shaft is loosened, the deformation failure risk is higher, the maintenance period is short, the cost is high, and the stability and the reliability are lower.

Disclosure of Invention

The purpose of this application is to provide an excavator hinge mechanism, can optimize the connected mode of connecting rod and rocking arm of excavator to effectively reduce the risk of round pin axle looseness, deformation.

To achieve the above object, the present application provides an excavator hinge mechanism including:

the first rocker arm, the connecting rod and the second rocker arm are sequentially connected with the first rocker arm hinge part, the connecting rod hinge part and the second rocker arm hinge part in a penetrating manner through a pin shaft so as to be hinged with each other, the end part of the pin shaft, which is connected with the first rocker arm hinge part in a penetrating manner, is a first shaft end part, and the end part of the pin shaft, which is connected with the second rocker arm hinge part in a penetrating manner, is a second shaft end part;

the first limiting structure comprises a baffle ring and a first bolt, the baffle ring is coaxially abutted with the axial outer end of the first rocker arm hinge part, the first bolt axially penetrates through the baffle ring and the first shaft end part, and the baffle ring is limited between the head part of the first bolt and the first shaft end part; and

the second limiting structure comprises a limiting plate arranged at the end part of the second shaft, and the limiting plate is in limiting butt joint with the axial outer end of the second rocker arm hinge part.

In some embodiments, the second limiting structure further comprises a rocker arm limiting protrusion protruding from an outer side arm surface of the second rocker arm, and the rocker arm limiting protrusion forms a circumferential limit for the limiting plate.

In some embodiments, the rocker arm limit projection faces the limit plate wall surface, the limit plate is a half waist plate and a part of the peripheral wall surface faces the limit plate wall surface.

In some embodiments, the plate thickness L1 of the limit plate is not less than the projection height L2 of the rocker arm limit projection on the outer side arm surface of the second rocker arm.

In some embodiments, the limiting plate and the pin are of an integral welded structure.

In some embodiments, an annular step portion is arranged on the outer peripheral wall of the second shaft end portion, the limiting plate is sleeved on the second shaft end portion in a penetrating mode, and a step surface of the annular step portion is in butt joint with a plate surface of the limiting plate.

In some embodiments, the outer peripheral wall of the second shaft end is provided with an annular step part, the limiting plate is sleeved on the second shaft end and forms a plate surface butt joint with the step surface of the annular step part, and the second limiting structure further comprises a second bolt penetrating and connecting the limiting plate and the second rocker arm.

In some embodiments, the first limiting structure further comprises a gasket and an elastic washer, the first bolt sequentially penetrates through the elastic washer and the gasket from outside to inside along the axial direction, and the gasket and the elastic washer are pressed between the baffle ring and the head of the first bolt.

In some embodiments, the axially outer end face of the retainer ring is concavely formed with a retainer ring groove portion, and the gasket and the elastic washer are disposed in the retainer ring groove portion.

In some casesIn an embodiment, the thickness of the gasket is not less than 3mm; and/or the area of the single-side annular surface of the gasket is not less than 550mm ² 。

According to the technical scheme, different pin shaft limiting modes are adopted at the hinge joint of the connecting rod and the first rocker arm and the hinge joint of the connecting rod and the second rocker arm, wherein the first limiting structure is arranged, the first bolt axially penetrates through the baffle ring and the first shaft end part of the pin shaft, the baffle ring is limited between the head part of the first bolt and the first shaft end part, the shearing stress born by the first bolt is small, the fracture and falling risks can be effectively reduced, and therefore the pin shaft is not easy to loosen and deform; through setting up second limit structure, utilize the limiting plate that sets up at the second shaft end of round pin axle, can realize limiting plate and the spacing butt of the axial outer end of second rocking arm articulated portion, strengthen the spacing to the round pin axle. Therefore, the excavator hinge mechanism can effectively prolong the maintenance period of the connecting rod and rocker arm connection, reduce the maintenance cost and improve the connection stability and reliability of the connecting rod and the rocker arm.

Additional features and advantages of embodiments of the present application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain, without limitation, the embodiments of the present application. Other figures may be made from the structures shown in these figures without inventive effort for a person of ordinary skill in the art. In the drawings:

FIG. 1 is a schematic illustration of an excavator articulating mechanism at the connection of a connecting rod and a first swing arm in accordance with one embodiment of the present application;

FIG. 2 is a schematic illustration of an excavator articulating mechanism at the connection of a connecting rod and a second swing arm in accordance with one embodiment of the present application;

FIG. 3 is a schematic view of a second rocker arm according to an embodiment of the present application;

FIG. 4 is a schematic illustration of a connecting rod in accordance with an embodiment of the present application;

FIG. 5 is a schematic view of a pin and a limiting plate according to an embodiment of the present application;

FIG. 6 is a cross-sectional view of a pin and a limiting plate in an embodiment of the present application;

FIG. 7 is a partial cross-sectional view of the second rocker arm of FIG. 3;

FIG. 8 is a partial cross-sectional view of FIG. 2;

FIG. 9 is a partial cross-sectional view of FIG. 1;

FIG. 10 is a schematic view of the stop ring of FIG. 9;

FIG. 11 is a schematic view of the gasket of FIG. 9;

fig. 12 is a schematic view of the spring washer of fig. 9.

Description of the reference numerals

10. First rocker arm 20 connecting rod

30. Second rocker arm 40 pin shaft

50. First bolt of baffle ring 60

70. Gasket 80 spring washer

90. Limiting plate

101. First rocker arm hinge 201 connecting rod hinge

301. Second rocker arm hinge 302 rocker arm limit projection

3021 annular step of spacing raised straight wall 401

501. Stop ring groove 901 limit plate straight wall surface

Detailed Description

The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.

An excavator articulating mechanism according to the present application is described below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the excavator hinge mechanism includes a first swing arm 10, a link 20, a second swing arm 30, a pin 40, a first limit structure and a second limit structure.

Specifically, the first rocker arm 10 is provided with a first rocker arm hinge portion 101, the link 20 is provided with a link hinge portion 201, and the second rocker arm 30 is provided with a second rocker arm hinge portion 301. The first rocker arm 10, the connecting rod 20 and the second rocker arm 30 sequentially penetrate through the first rocker arm hinge part 101, the connecting rod hinge part 201 and the second rocker arm hinge part 301 through the pin shaft 40 to be hinged with each other, so that the first rocker arm 10 and the second rocker arm 30 are fixed relative to the pin shaft 40, and the connecting rod 20 can rotate around the pin shaft 40.

In addition, the end portion of the pin shaft 40 penetrating through the first rocker arm hinge portion 101 is a first shaft end portion, the end portion of the pin shaft 40 penetrating through the second rocker arm hinge portion 301 is a second shaft end portion, the first shaft end portion is limited by the first limiting structure, and the second shaft end portion is limited by the second limiting structure.

More specifically, the first limiting structure includes a retainer ring 50 and a first bolt 60, the retainer ring 50 is coaxially abutted with the axially outer end of the first rocker arm hinge portion 101, the first bolt 60 axially penetrates the retainer ring 50 and the first shaft end portion, and the retainer ring 50 is limited between the head portion and the first shaft end portion of the first bolt 60. With this structure, the shearing stress applied to the first bolt 60 is small, so that the risk of breakage and falling off can be effectively reduced, and the pin shaft 40 is not easy to loosen and deform. The second limiting structure comprises a limiting plate 90 arranged at the end part of the second shaft, and the limiting plate 90 is in limiting abutting connection with the outer end of the second rocker arm hinge part 301 in the axial direction, so that the limiting of the pin shaft 40 can be enhanced.

Therefore, the excavator hinge mechanism can effectively prolong the maintenance period of the connecting part of the connecting rod 20 and the rocker arm, reduce the maintenance cost and improve the connection stability and reliability of the connecting rod 20 and the rocker arm.

In one embodiment, the second limiting structure may further include a rocker arm limiting protrusion 302 protruding from an outer arm surface of the second rocker arm 30, where the rocker arm limiting protrusion 302 forms a circumferential limit on the limiting plate 90, so that even if the pin 40 loosens, the rotation amplitude of the pin 40 can be effectively limited, and the connection stability and reliability of the connecting rod 20 and the rocker arm are further enhanced.

In one embodiment, the wall surface of the rocker arm spacing protrusion 302 facing the spacing plate 90 is a spacing protrusion straight wall surface 3021, and the spacing plate 90 is a half-waist-shaped plate, a portion of the peripheral wall surface of which is formed as a spacing plate straight wall surface 901 facing the spacing protrusion straight wall surface 3021. In this embodiment, the rotation range of the pin 40 is limited by the wall surface formed by the limiting convex straight wall surface 3021 and the limiting plate straight wall surface 901.

The limiting convex straight wall surface 3021 and the limiting plate straight wall surface 901 can be arranged in an abutting mode; alternatively, as shown in fig. 8, a smaller distance d may be left between the limiting raised straight wall surface 3021 and the limiting plate straight wall surface 901, so that the precision of the matching between the limiting raised straight wall surface 3021 and the limiting plate straight wall surface 901 is not required to be considered, and even if the first bolt 60 loosens or falls off, the limiting plate 90 (the pin 40) can only rotate in a small amplitude, so that the looseness and the aggravation of the pin 40 are avoided, and the deformation risk is reduced.

In one embodiment, referring to FIGS. 6 and 7, the plate thickness L1 of the limiting plate 90 is not less than the bump height L2 of the rocker arm limiting bump 302 on the outer side arm surface of the second rocker arm 30, i.e., L1+.L 2. So set up, limiting plate 90 has sufficient board thickness to guarantee self intensity, and simultaneously, limiting plate 90 is great relatively with the area of the junction of round pin axle 40, can reduce the influence of its shearing force that acts on round pin axle 40 to reduce the deformation risk of round pin axle 40.

The stop plate 90 and the pin 40 of the present application may be connected in a variety of different connection manners. For example, the limiting plate 90 and the pin 40 may be an integral welded structure; alternatively, the limiting plate 90 may be detachably connected to the pin 40, etc.

In order to determine the axial position of the limiting plate 90 on the second shaft end of the pin shaft 40, during production and processing, an annular step 401 is provided on the outer peripheral wall of the second shaft end, so that when the limiting plate 90 is connected to the second shaft end of the pin shaft 40, the limiting plate 90 is sleeved on the second shaft end until the step surface of the annular step 401 is in butt joint with the plate surface of the limiting plate 90, and then the limiting plate 90 and the pin shaft 40 are fixed by welding, penetrating connection and other modes.

In one embodiment, the second limiting structure may include a second bolt for connecting the limiting plate 90 and the second rocker arm 30 after the step surface of the annular step portion 401 is abutted with the plate surface of the limiting plate 90, so as to effectively lock the limiting plate 90 and the second rocker arm 30.

In one embodiment, referring to fig. 9 to 12, the first limiting structure may further include a spacer 70 and an elastic washer 80, in which case the first bolt 60 sequentially passes through the elastic washer 80 and the spacer 70 from outside to inside in an axial direction, and the spacer 70 and the elastic washer 80 are compressed between the retainer ring 50 and the head of the first bolt 60.

By providing the spacer 70 and the elastic washer 80, stability and reliability of the excavator articulating mechanism can be further improved. The gasket 70 is of a sheet structure with a larger size relative to the elastic gasket 80, and the contact area between the gasket 70 and the baffle ring 50 is larger, so that friction force between the gasket 70 and the baffle ring 50 is larger, and the gasket 70 can disperse pressure applied on the baffle ring 50 by the head of the first bolt 60, so that the baffle ring 50 is more stable, the risk of loosening at the hinge joint of the connecting rod and the rocker arm is reduced, and the risk of deformation of the gasket 70 can be reduced when the gasket 70 is of a type with a larger thickness. As for the elastic washer 80, it applies pressure to the head of the first bolt 60 after the first bolt 60 is tightened, thereby increasing the friction between the elastic washer 80 and the head of the first bolt 60. It can be seen that the combination of the washer 70 and the resilient washer 80 is suitable for use in a location where the connection rod 20 is frequently attached to the rocker arm. In addition, the elastic washer 80 and the gasket 70 are standard components, so that the materials are easy to obtain, and the universality is high.

Further, the axially outer end surface of the baffle ring 50 may be concavely formed with a baffle ring groove portion 501, and the space in the groove of the baffle ring groove portion 501 is used as the installation space of the gasket 70 and the elastic gasket 80, so that the installation stability of the gasket 70 and the elastic gasket 80 is improved, and the gasket 70 and the elastic gasket 80 are not easy to be polluted or knocked due to the concealed installation, which is beneficial to prolonging the service life.

According to the above, the larger the contact area between the gasket 70 and the retainer ring 50, the more stable and reliable the hinge joint between the connecting rod 20 and the rocker arm, so when the gasket 70 is mounted in the retainer ring groove 501, the gasket 70 can cover the bottom wall of the retainer ring groove 501 by using the gasket 70 with a proper size, and the gasket 70 can be limited by the inner wall of the retainer ring groove 501 to achieve better stability and reliability.

In one embodiment, the thickness of the spacer 70 is not less than 3mm, for example, 5mm may be selected, and the spacer 70 is thicker than the thickness of the conventional spacer, so as to effectively reduce the risk of deformation of the spacer itself; and/or the area of the one-sided annular surface of the gasket 70 is not less than 550mm ² For example, 574mm ² The type of the gasket 70 can be selected with reference to the GB/T96.1-2002 large gasket class A standard with a large contact area with the retainer 50. In this way, the gasket 70 can be made to have a relatively large size as much as possible.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," 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 the present application. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims

1. An excavator articulating mechanism, the excavator articulating mechanism comprising:

the first rocker arm (10), the connecting rod (20) and the second rocker arm (30) are sequentially connected with the first rocker arm hinge part (101), the connecting rod hinge part (201) and the second rocker arm hinge part (301) in a penetrating manner through a pin shaft (40) so as to be mutually hinged, wherein the end part of the pin shaft (40) penetrating through the first rocker arm hinge part (101) is a first shaft end part, and the end part penetrating through the second rocker arm hinge part (301) is a second shaft end part;

the first limiting structure comprises a baffle ring (50) and a first bolt (60), wherein the baffle ring (50) is coaxially abutted with the axial outer end of the first rocker arm hinge part (101), the first bolt (60) axially penetrates through the baffle ring (50) and the first shaft end part, and the baffle ring (50) is limited between the head part of the first bolt (60) and the first shaft end part; and

the second limiting structure comprises a limiting plate (90) arranged at the end part of the second shaft, and the limiting plate (90) is in limiting butt joint with the axial outer end of the second rocker arm hinge part (301).

2. The excavator hinge mechanism of claim 1 wherein the second limit structure further comprises a rocker limit projection (302) projecting from an outboard arm face of the second rocker arm (30), the rocker limit projection (302) forming a circumferential limit to the limit plate (90).

3. The excavator hinge mechanism according to claim 2, wherein the rocker arm limit projection (302) is formed to face a limit projection straight wall surface (3021) of the limit plate (90), the limit plate (90) is a half waist-shaped plate and a part of a peripheral wall surface is formed to face a limit plate straight wall surface (901) of the limit projection straight wall surface (3021).

4. The excavator hinge mechanism according to claim 2, wherein the plate thickness L1 of the limit plate (90) is not smaller than the projection height L2 of the rocker arm limit projection (302) on the outer arm surface of the second rocker arm (30).

5. The excavator hinge mechanism of claim 1 wherein the stop plate (90) is of unitary welded construction with the pin (40).

6. The excavator hinge mechanism according to claim 5, wherein the outer peripheral wall of the second shaft end portion is provided with an annular step portion (401), the limiting plate (90) is sleeved on the second shaft end portion, and a step surface of the annular step portion (401) is abutted with a plate surface of the limiting plate (90).

7. The excavator hinge mechanism according to claim 1, wherein the outer peripheral wall of the second shaft end portion is provided with an annular step portion (401), the limiting plate (90) is sleeved on the second shaft end portion and forms a plate surface butt joint with a step surface of the annular step portion (401), and the second limiting structure further comprises a second bolt penetrating and connecting the limiting plate (90) and the second rocker arm (30).

8. The excavator hinge mechanism of any one of claims 1 to 7 wherein the first limit structure further comprises a washer (70) and an elastomeric washer (80), the first bolt (60) passing axially outwardly and inwardly through the elastomeric washer (80) and the washer (70) in sequence, the washer (70) and elastomeric washer (80) being compressed between the stop ring (50) and the head of the first bolt (60).

9. The excavator hinge mechanism according to claim 8, wherein an axially outer end face of the retainer ring (50) is concavely formed with a retainer ring groove portion (501), and the spacer (70) and the elastic washer (80) are provided in the retainer ring groove portion (501).

10. The excavator articulating mechanism of claim 8 wherein the shim (70) is not less than 3mm thick; and/or the area of the single-side annular surface of the gasket (70) is not less than 550mm ² 。