阅读说明：本技术 一种销轴组件及挖掘机 (Pin shaft assembly and excavator ) 是由 张寒冰 陈晨 吴涛 于 2020-08-27 设计创作，主要内容包括：本申请提供了一种销轴组件及挖掘机,包括销轴、金属块、固定件,用于连接运动部件与第一基本部件、第二基本部件。销轴依次穿设第一连基本部件、运动部件、第二基本部件。销轴一端设置有凸台,以实现左端轴向定位；销轴的另一端开设有通孔,其上安装有固定件,以实现右端轴向定位。第一基本部件上设置有金属块,金属块与凸台形成卡位结构,实现销轴的周向定位。通过采用两端轴向定位的结构,改善销轴的轴向受力,而且固定件是安装在销轴上,固定件中固定柱受到的剪切力比现有技术中轴环或者定位套焊接在第二基本部件上的方式小,延长整个组件的寿命；同时采用金属块与销轴的凸台形成的卡位结构,实现周向定位,比现有技术装配或者安装简单。(The application provides a pin shaft assembly and an excavator, which comprise a pin shaft, a metal block and a fixing piece and are used for connecting a moving part with a first basic part and a second basic part. The pin shaft penetrates through the first basic connection component, the moving component and the second basic component in sequence. One end of the pin shaft is provided with a boss so as to realize axial positioning of the left end; the other end of the pin shaft is provided with a through hole, and a fixing piece is arranged on the through hole to realize the axial positioning of the right end. The first basic part is provided with a metal block, and the metal block and the boss form a clamping structure to realize circumferential positioning of the pin shaft. The axial stress of the pin shaft is improved by adopting a structure with two axially positioned ends, the fixing piece is arranged on the pin shaft, the shearing force applied to the fixing column in the fixing piece is smaller than that of the mode that a shaft collar or a positioning sleeve is welded on a second basic component in the prior art, and the service life of the whole assembly is prolonged; meanwhile, a clamping structure formed by the metal block and the boss of the pin shaft is adopted, circumferential positioning is achieved, and assembly or installation is simpler than that in the prior art.)

1. A pin assembly, comprising: the device comprises a pin shaft (100), a metal block (210) and a fixing piece (400), wherein the pin shaft (100) sequentially penetrates through a first basic component (200), a moving component (500) and a second basic component (300), a boss (120) is arranged at a first end of the pin shaft (100), and a through hole (110) is arranged at a second end of the pin shaft; the metal block (210) is fixed on the first basic component (200) through welding or bolts, and forms a clamping structure with the boss (120) of the pin shaft (100); the fixing piece (400) is arranged at one end of the pin shaft (100) provided with the through hole (110).

2. The pin assembly according to claim 1, wherein the lower end surface of the boss (120) is provided with a tangent plane (121), and the metal block (210) is positioned below the tangent plane (121);

the boss (120) is provided separately from the metal block (210).

3. The pin assembly of claim 1, wherein the fixing member (400) comprises a collar (410), a fixing post and a fixing key; the shaft collar (410) is sleeved on the pin shaft (100); one end of the fixing column penetrates through the collar (410) and the pin shaft (100) and is connected with the fixing key.

4. The pin assembly of claim 3, wherein the fixing post is a bolt (420) or a pin and the fixing key is a nut (430) or a pin.

5. An excavator comprising a pin assembly as claimed in any one of claims 1 to 4.

Technical Field

The application relates to the field of pin shafts, in particular to a pin shaft assembly and an excavator.

Background

The working device of the excavator generally comprises a movable arm, an arm, a bucket, various oil cylinders and a link mechanism, wherein the various mechanisms are connected through pin shafts and auxiliary components thereof. Common pin shaft forms are: pin shafts with holes, yoke plate pin shafts and the like. One end of the pin shaft with the hole is fixed on the positioning sleeve by a bolt, the bolt limits the circumferential rotation and the axial movement of the pin shaft and is sheared, and if the pin shaft axially moves or is clamped with the shaft sleeve, the bolt is easily deformed or broken by larger shearing force; the yoke plate round pin axle is mostly the welding body of round pin axle and yoke plate, and it is through clamp plate or screw snap-on the part, is the yoke plate that the yoke plate round pin axle has been fixed to the unilateral in fact, if the round pin axle takes place the jamming with the axle sleeve, has the axle sleeve to scurry outward or yoke plate round pin axle welding seam inefficacy fracture.

Disclosure of Invention

In order to solve the problems, the application provides a pin shaft assembly and an excavator, and the specific technical scheme is as follows:

a pin shaft assembly comprises a pin shaft, a metal block and a fixing piece, wherein the pin shaft sequentially penetrates through a first basic component, a moving component and a second basic component, a boss is arranged at a first end of the pin shaft, and a through hole is formed at a second end of the pin shaft; the metal block is fixed on the first basic component and forms a clamping structure with the boss of the pin shaft; the fixing piece is installed at one end of the pin shaft with a through hole.

According to the further technical scheme, a tangent plane is arranged on the lower end face of the boss, and the metal block is located below the tangent plane;

in the implementation process, the contact area between the metal block and the boss is increased by the tangent plane, and the stability of the whole pin shaft assembly is improved.

In a further technical scheme, the metal block and the boss are separately arranged;

in the implementation process, the upper end face of the metal block and the lower end face of the boss keep a certain distance, so that the pin shaft can rotate by a certain angle to play a role in buffering.

Optionally, the fixing column is a bolt or a pin, and the fixing key is a nut or a pin.

In all the implementation processes, one end of the pin shaft is provided with the boss so as to realize axial positioning of the left end; the other end of the pin shaft is provided with a through hole, and the fixing piece is installed on the through hole to realize axial positioning of the right end, so that axial positioning of two ends of the pin shaft is realized. The metal block is arranged on the first basic component, and the metal block and the boss of the pin shaft form a clamping structure, so that the circumferential positioning of the pin shaft is realized.

An excavator, the excavator has the pin shaft assembly of any one of the above.

The beneficial effects of round pin axle subassembly and excavator among the above-mentioned technical scheme lie in:

(1) the shaft collar is fixed on the pin shaft instead of welding the shaft collar or the positioning sleeve on the second basic component, so that the shearing force applied to the fixing column is small, and the falling off and mechanical damage of the fixing column caused by overlarge shearing force are avoided.

(2) The invention adopts a mode of fixing the two ends axially, so that the stress is improved when the pin shaft generates axial float or is blocked with the shaft sleeve.

(3) The invention utilizes the boss of the pin shaft and the metal block to match with circumferential positioning, has simple structure and convenient manufacture, only needs to insert the pin shaft into a basic component during installation, and the pin shaft and the boss are integrated, thereby avoiding the failure and cracking of the welding seam of the pin shaft of the yoke plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a cross-sectional view of a pin assembly provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pin provided in an embodiment of the invention;

FIG. 3 is a right side view of a pin assembly provided by an embodiment of the present invention;

FIG. 4 is a left side view of a pin assembly provided by an embodiment of the present invention;

FIG. 5 is a schematic view of a collar provided by an embodiment of the present invention.

Marking: 100-pin shaft; 110-a via; 120-boss; 121-section cutting; 200-a first base member; 210-a metal block; 300-a second base member; 400-a fixture; 410-a collar; 420-bolt; 430-nut; 500-a moving part; 600-shaft sleeve; 700-shim.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 2, an embodiment of the present invention provides a pin assembly, where the pin assembly includes a pin 100, a metal block 210, and a fixing element 400, where the pin 100 sequentially passes through a first basic component 200, a moving component 500, and a second basic component 300, a shaft sleeve 600 is provided in the moving component 500 in advance, and a gasket 700 is provided between the moving component 500 and the first basic component 200, and the second basic component 300 in advance; the metal block 210 is welded or fixed on the outer side of the first base member 200 by bolts; the fixing member 400 is installed at one end of the pin 100 having the through hole 110.

Further, a boss 120 is disposed at a first end of the pin 100, and a through hole 110 is disposed at a second end.

As shown in fig. 3, a tangent plane 121 is disposed on a lower end surface of the boss 120, and the metal block 210 is located below the tangent plane 121 and can form a clamping structure with the boss 120 to achieve axial positioning of the pin 100.

Further, the section 121 increases the contact area between the metal block 210 and the boss 120, and increases the stability of the entire pin assembly.

Further, a certain distance is kept between the upper end surface of the metal block 210 and the lower end surface of the boss 120, so that the pin 100 can rotate at a certain angle to play a role in buffering.

In a further technical scheme, the distance from the lower end surface of the boss 120 to the axis is greater than or equal to the radius of the pin shaft 100).

As shown in fig. 4 and 5, the fixing member 400) includes a collar 410, a fixing post and a fixing key; the shaft collar 410 is sleeved on the pin shaft 100; one end of the fixing column penetrates through the collar 410 and the pin shaft 100 and is connected with the fixing key, so that the right end of the pin shaft 100 is axially positioned; the pin 100 itself has a boss 120 to achieve axial positioning of the left end of the pin 100, and thus axial positioning of both ends of the pin 100.

Optionally, the fixing column is a bolt 420 or a pin, and the fixing key is a nut 430 or a pin.

The embodiment of the invention also discloses an excavator which is provided with the pin shaft assembly. It should be noted that, in the actual working process, the first base unit 200 and the second base unit 300 may be a boom or a bucket of an excavator, and the boom and the bucket are integrated, that is, the distance between the first base unit 200 and the second base unit 300 is fixed. In other connection manners, the first base unit 200 and the second base unit 300 may be rockers, which are separated from each other in a left-right manner but are fixed in distance.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.