CN114635911B

CN114635911B - Pin shaft assembly and assembling method thereof and engineering machinery

Info

Publication number: CN114635911B
Application number: CN202210261585.7A
Authority: CN
Inventors: 张国仙; 董鲁波; 陈军印
Original assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Current assignee: Jiangsu XCMG Construction Machinery Institute Co Ltd
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2023-04-07
Anticipated expiration: 2042-03-16
Also published as: CN114635911A

Abstract

The application relates to a pin shaft assembly, an assembling method thereof and engineering machinery. The pin shaft assembly comprises a first component, a second component and a positioning device, a shaft sleeve is arranged on the first component, a pin hole matched with the shaft sleeve is formed in the second component, the positioning device comprises a positioning piece, the positioning piece is movably arranged on the second component, the positioning piece is provided with a positioning arc surface, the positioning arc surface is matched with the outer surface of the shaft sleeve, and the positioning arc surface is attached to the outer surface of the shaft sleeve when the pin hole is aligned with the shaft sleeve. Based on this, can effectively improve the efficiency and the accuracy of round pin axle assembly.

Description

Pin shaft assembly and assembling method thereof and engineering machinery

Technical Field

The application relates to the technical field of engineering machinery, in particular to a pin shaft assembly, an assembling method thereof and engineering machinery.

Background

In construction machines, a pin is often used to achieve articulation between different components. At present, in the assembly process of the pin shaft each time, whether pin holes of different components are centered can be judged usually only by eyes and experiences, the problems of low efficiency and poor accuracy exist, the requirement of rapid assembly is difficult to meet, and parts are easy to damage.

Disclosure of Invention

One technical problem to be solved by the present application is: the efficiency and the accuracy of round pin axle assembly are improved.

In order to solve the above technical problem, the first aspect of the present application provides a pin assembly, which includes:

the first component is provided with a shaft sleeve;

the second component is provided with a pin hole used for being matched with the shaft sleeve;

the pin shaft penetrates through the shaft sleeve and the pin hole to connect the first component and the second component; and

the positioning device comprises a positioning piece, the positioning piece is movably arranged on the second component, the positioning piece is provided with a positioning arc surface, and the positioning arc surface is matched with the outer surface of the shaft sleeve and is used for being attached to the outer surface of the shaft sleeve when the pin hole is aligned with the shaft sleeve.

In some embodiments, the positioning member is provided with an elongated hole, and the fastener passes through the elongated hole to fix the positioning member to the second component.

In some embodiments, the elongated hole is an oblong hole.

In some embodiments, the positioning device includes an adjusting mechanism disposed on the second member and adjusting the position of the positioning element to make the positioning arc face close to or far away from the center of the shaft sleeve.

In some embodiments, the adjustment mechanism includes a mounting member fixed to the second member and an adjustment member movably disposed on the mounting member and coupled to the positioning member to adjust the position of the positioning member when actuated.

In some embodiments, the adjustment member includes a threaded connector that is threadably coupled to the mounting member and coupled to the positioning member to adjust the position of the positioning member during the screwing process.

In some embodiments, the threaded connection comprises an adjustment bolt.

In some embodiments, the first member is provided with two bushings, the two bushings are located on two sides of the first member along the axial direction of the shaft hole, and the pin shaft assembly comprises two positioning devices, and the two positioning devices correspond to the two bushings one to one.

The second aspect of the present application provides an engineering machine, which includes the pin shaft assembly of the embodiments of the present application.

The second aspect of the present application provides an assembling method for a pin shaft assembly according to an embodiment of the present application, including:

assembling the first component and the second component for the first time, visually judging the alignment of the first component and the second component in the first assembling process, then penetrating the pin shaft through the shaft sleeve and the pin hole, fixing, then fitting the positioning cambered surface of the positioning piece with the outer surface of the shaft sleeve, and fixing the positioning piece on the second component;

and the first component and the second component are reassembled, in the reassembling process, the positioning cambered surface of the positioning piece is used for guiding and positioning to enable the shaft sleeve and the pin hole to be aligned, and then the pin shaft penetrates through the shaft sleeve and the pin hole and is fixed.

Based on the pin shaft assembly, the positioning cambered surface of the positioning piece can be used for guiding and positioning the middle process in the pin shaft assembly process, so that rapid centering is realized, and therefore the efficiency and the accuracy of pin shaft assembly can be effectively improved.

Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a pin assembly in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a first member in an embodiment of the present application.

Fig. 3 is a schematic view of a combination of a second member and a positioning device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a positioning element in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a pin in the embodiment of the present application.

Fig. 6 is a flow chart illustrating an assembly method according to an embodiment of the present application.

Description of reference numerals:

10. a pin assembly;

1. a first member; 11. a shaft sleeve;

2. a second member; 21. a pin hole;

3. a positioning device; 31. a positioning member; 32. positioning the arc surface; 33. a long hole; 34. a long round hole; 35. an adjustment mechanism; 36. a mounting member; 37. an adjustment member; 38. a threaded connection; 39. adjusting the bolt;

4. a fastener; 41. fixing the bolt; 42. fastening a gasket;

5. a limiting device; 52. a limiting plate; 53. fastening a bolt; 54. a limiting gasket; 55. a limit bolt;

6. a pin shaft; 61. a shaft body; 62. an end plate; 63. and connecting the holes.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present application, it should be understood that the terms "first," "second," and the like are used for limiting the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the above terms do not have special meanings, and therefore, should not be construed as limiting the scope of the present application.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

At present, different components of engineering machinery are hinged mainly through a pin shaft. In the pin shaft assembling process, whether the shaft holes of different components are aligned is generally judged by means of vision and experience, but the problems of large error and strong randomness exist in common visual and experience judgment, in the assembling process, the shaft holes of all parts are not easy to align, the positions of all the components need to be finely adjusted manually and repeatedly, the assembling efficiency is low, the quick assembling requirements of engineering machinery, particularly modular mechanical equipment (such as a modular walking excavator) which is frequently and quickly assembled and disassembled are difficult to meet, in addition, when the shaft holes of all the components are not aligned, the pin shaft is adopted for forced assembling, and large damage is easily formed on matching surfaces such as sealing parts, pin holes and the like.

It can be seen that, the conventional round pin axle assembly mode, there is the problem that efficiency is lower, and the accuracy is relatively poor, not only is difficult to satisfy the rapid Assembly demand, also causes the part to damage simultaneously easily.

To the above, the present application provides a pin assembly.

Fig. 1-5 illustrate exemplary pin assembly configurations of the present application.

Referring to fig. 1-5, the present application provides a pin assembly 10 including a first member 1, a second member 2, a pin 6, and a positioning device 3. Wherein the first member 1 is provided with a bushing 11. The second member 2 is provided with a pin hole 21 for engagement with the boss 11. The pin 6 passes through the boss 11 and the pin hole 21 to connect the first member 1 and the second member 2. The positioning device 3 includes a positioning member 31, the positioning member 31 is movably disposed on the second member 2, and the positioning member 31 has a positioning arc surface 32, the positioning arc surface 32 is adapted to the outer surface of the bushing 11 and is adapted to be attached to the outer surface of the bushing 11 when the pin hole 21 is aligned with the bushing 11.

Based on the above arrangement, in the pin shaft assembling process, whether centering is performed or not is judged without depending on visual and experience every time, but whether the positioning arc surface 32 of the positioning piece 31 is attached to the outer surface of the shaft sleeve 11 on the first component 1 or not can be used as a mark for judging whether centering (namely center alignment) is performed or not between the shaft sleeve 11 on the first component 1 and the pin hole 21 on the second component 2, so that the centering accuracy is high, repeated manual adjustment steps can be omitted, and therefore, quick centering can be realized, the efficiency and accuracy of pin shaft assembling are effectively improved, the quick assembling requirements of engineering machinery such as a modularized walking excavator are well met, and the damage risk of parts such as a sealing piece and a shaft hole is reduced.

Specifically, based on the above arrangement, the pin shaft 6 can be assembled in the following manner:

(1) First, in the first assembling process, the positioning member 31 is positioned so that the positioning arc surface 32 of the positioning member 31 indicates the centering position. More specifically, in the process of first assembling the first member 1 and the second member 2, after visually judging that the first member 1 and the second member 2 are aligned, the pin shaft 6 passes through the shaft sleeve 11 and the pin hole 21 and is fixed, then the positioning arc surface 32 of the positioning member 31 is attached to the outer surface of the shaft sleeve 11, and the positioning member 31 is fixed on the second member 2, at this time, the positioning arc surface 32 of the positioning member 31 can mark the alignment position;

(2) Then, in each assembling process after the first assembling, the positioning arc surface 32 of the positioning piece 31 can be used for guiding to realize quick centering. More specifically, in the process of assembling the first member 1 and the second member 2 again, the positioning arc surface 32 of the positioning member 31 is used for guiding and positioning to center the bushing 11 and the pin hole 21, and then the pin shaft 6 is inserted through the bushing 11 and the pin hole 21 and fixed. Wherein, when the positioning arc surface 32 is engaged with the outer surface of the sleeve 11, it means that the sleeve 11 and the pin hole 21 are already aligned.

It can be seen that, by adopting the above mode, only visual centering mode is needed to be adopted during first assembly, and then in each assembly process, the centering mode based on the positioning cambered surface 32 can be adopted, so that rapid centering is carried out, the efficiency is high, and the accuracy is good.

In order to achieve the movable arrangement of the positioning member 31 on the second component 2, referring to fig. 1-4, in some embodiments, an elongated hole 33 (e.g., an elongated hole 34) is provided on the positioning member 31, and the fastening member 4 passes through the elongated hole 33 to fix the positioning member 31 on the second component 2. In this way, the positioning member 31 can be fixed at different length positions of the elongated hole 33 by the fastening member 4, so that the relative position of the positioning member 31 and the second member 2 can be changed, and the positioning arc surface 32 of the positioning member 31 can be conveniently attached to the outer surface of the shaft sleeve 11 aligned with the pin hole 21, so as to mark the aligned position.

1-4, in some embodiments, the positioning device 3 includes not only the positioning member 31, but also an adjustment mechanism 35. The adjusting mechanism 35 is disposed on the second member 2 and adjusts the position of the positioning member 31 such that the positioning member 31 is close to or away from the center of the boss 11. Thus, in the process of marking the centering position of the positioning element 31, the positioning element 31 can reach the position where the positioning arc surface 32 is attached to the outer surface of the shaft sleeve 11 centered with the pin hole 21 by operating the adjusting mechanism 35, which is convenient and efficient.

1-4, in some embodiments, the adjustment mechanism 35 includes a mounting member 36 and an adjustment member 37. The mounting member 36 is fixed to the second member 2. The adjusting member 37 is movably disposed on the mounting member 36 and coupled to the positioning member 31 to adjust the position of the positioning member 31 when actuated. Therefore, the positioning member 31 can be moved close to or away from the center of the shaft sleeve 11 by operating the adjusting member 37, so that the positioning arc surface 32 is attached to the outer surface of the shaft sleeve 11 aligned with the pin hole 21, thereby indicating the alignment position.

Illustratively, in some embodiments, the adjusting member 37 includes a threaded connector 38 (e.g., an adjusting bolt 39), and the threaded connector 38 is threadedly coupled to the mounting member 36 and coupled to the positioning member 31 to adjust the position of the positioning member 31 during screwing. At this time, the positioning member 31 can be conveniently adjusted to the position where the positioning arc surface 32 is attached to the outer surface of the shaft sleeve 11 aligned with the pin hole 21 only by screwing the threaded connecting member 38, so that the efficiency is high, and the adjustment accuracy is high.

In the foregoing embodiments, two bushings 11 may be disposed on the first member 1, the two bushings 11 are disposed on two sides of the first member 1 along the axial direction of the shaft hole, and accordingly, the pin assembly 10 includes two positioning devices 3, and the two positioning devices 3 correspond to the two bushings 11 one by one. Like this, in the assembling process, the axial both sides all can utilize the location cambered surface 32 of setting element 31, lead and fix a position, realize quick centering, and efficiency is higher, and the accuracy is better.

The embodiments shown in fig. 1-5 will be further described below.

As shown in fig. 1-5, in this embodiment, the pin assembly 10 includes a first member 1, a second member 2, a pin 6, a limiting device 5, a positioning device 3, and a fastener 4.

The first member 1 and the second member 2 are two parts connected by a pin 6. During the pin assembling process, the first member 1 may be kept stationary and only the second member 2 may be moved, and at this time, the first member 1 may be referred to as a stationary member and the second member 2 may be referred to as a movable member. As shown in fig. 2, in this embodiment, two bosses 11 are provided on the first member 1, and the bosses 11 are welded to both side walls of the first member 1 symmetrically with each other. Meanwhile, the second member 2 is provided with a pin hole 21. The pin hole 21 axially penetrates the second member 2. When assembled, the second member 2 is inserted into the first member 1 with the center of the pin hole 21 aligned with the centers of the two bosses 11, i.e., the bosses 11 are centered with the pin holes 21.

The pin 6 passes through the sleeve 11 and the pin hole 21 which are aligned with each other, and the first member 1 and the second member 2 are connected. The pin 6 passing through the sleeve 11 and the pin hole 21 is limited and fixed by the limiting device 5 to prevent the pin 6 from slipping.

The limiting device 5 is arranged on the first component 1 and used for limiting and fixing the pin shaft 6. As shown in fig. 1 and 5, in this embodiment, the pin 6 includes a shaft body 61 and an end plate 62. The shaft body 61 is provided with a coupling hole 63. The end plate 62 is connected to one end of the shaft body 61 for being stuck to the outer wall of the first member 1 to limit the depth of insertion of the shaft body 61 into the boss 11 and the pin hole 21. The limiting device 5 is located at the end of the pin 6 and comprises a limiting plate 52. The retainer plate 52 is provided with an arc-shaped groove (not shown). The end plate 62 and the stopper plate 52 are located on both sides of the center of the shaft body 61 and abut. After the end plate 62 and the limiting plate 52 are butted, the limiting gasket 54 is placed, the fastening bolt 53 is inserted into the connecting hole 63 on the shaft body 61 through the arc-shaped groove on the limiting plate 52 and is screwed, so that the displacement of the shaft body 61 is further limited, and the shaft body 61 is fixed under the combined action of the end plate 62, the limiting plate 52, the limiting gasket 54 and the fastening bolt 53. Wherein the position limiting plate 52 can be fixed on the first member 1 by a position limiting bolt 55.

The positioning device 3 is used for positioning and guiding in the centering process so as to realize quick centering of the shaft sleeve 11 and the pin hole 21. As shown in fig. 1 to 4, in this embodiment, the positioning device 3 is disposed on one side outer wall of the second member 2, and includes a positioning member 31 and an adjusting mechanism 35. The adjustment mechanism 35 includes a mounting member 36 and an adjustment bolt 39. Wherein the mounting member 36 is block-shaped and welded to the outer wall of the second member 2. The adjusting bolt 39 has an axial direction perpendicular to the axial direction of the pin hole 21, is threaded into the mounting member 36, passes through the mounting member 36, and contacts or is connected to the positioning member 31, so that when the adjusting bolt 39 is screwed, the positioning member 31 is driven to translate to be close to or far from the center of the boss 11 on the first member 1. The positioning member 31 is plate-shaped, and two oblong holes 34 and a positioning arc surface 32 are formed on the positioning member 31. The two oblong holes 34 are positioned on two axial sides of the adjusting bolt 39, and the length direction of each oblong hole 34 is parallel to the axial direction of the adjusting bolt 39, so that the positioning member 31 is fixed by the fastening member 4 in the process that the adjusting bolt 39 drives the positioning member 31 to approach or depart from the shaft sleeve 11. The positioning cambered surface 32 is arranged at one end of the positioning piece 31, which is far away from the mounting piece 36, and the positioning cambered surface 32 is matched with the outer surface of the shaft sleeve 11 (namely, the cylindrical surface of the shaft sleeve 11), so that when the positioning piece 31 translates under the action of the adjusting bolt 39, the positioning cambered surface 32 can be close to or far away from the center of the shaft sleeve 11, and can be attached to the outer surface of the shaft sleeve 11 when the shaft sleeve 11 is centered with the pin hole 21, so that the centering position is marked and positioned.

The fastening member 4 is used to fix the positioning member 31 adjusted in position on the second component 2, so that the positioning member 31 can be stably maintained at the adjusted position, and thus rapid centering can be achieved in subsequent assembling processes. As shown in fig. 3, in this embodiment, the fastener 4 includes a fixing bolt 41 and a fastening washer 42. When the adjusting bolt 39 is screwed to the positioning arc surface 32 of the positioning piece 31 and is attached to the outer surface of the shaft sleeve 11, the fastening gasket 42 can be put on, the fixing bolt 41 passes through the oblong hole 34 and the corresponding round hole on the second component 2, and is screwed tightly, so that the positioning piece 31 is fixed at the corresponding position, and thus, the positioning piece 31 can be stably kept at the adjusted position, and the centering position can be accurately marked and positioned, so that the centering position can be guided and positioned in each subsequent assembling process.

Wherein, the fasteners 4 correspond to the oblong holes 34 one by one; the positioning devices 3 correspond to the shaft sleeves 11 one by one. Since the boss 11 is two in this embodiment, the number of the positioning devices 3 is also two. Two positioning devices 3 are symmetrically arranged on both sides of the second member 2, one to one corresponding to the two bushings 11.

The assembly process of the pin assembly 10 of this embodiment is generally as follows:

1. first assembling process of the first member 1 and the second member 2 (i.e., first mounting process of the pin 6)

(1) When the first component 1 and the second component 2 are assembled for the first time, the conventional pin shaft 6 assembling mode is adopted for assembly, namely, after the pin hole 21 of the second component 2 is judged to be aligned with the shaft sleeve 11 of the first component 1 by visual observation, the pin shaft 6 is penetrated, and then the pin shaft 6 is fixed by the limiting device 5;

(2) And then, screwing the two adjusting bolts 39 to enable the positioning cambered surfaces 32 of the two positioning pieces 31 to be completely attached to the outer surfaces of the two shaft sleeves 11 respectively, finally screwing the fixing bolts 41 to fix the positioning pieces 31, wherein the centering positions of the positioning pieces 31 can be marked, and during the next assembly, the accurate centering can be realized only by adjusting the position of the second component 2 to enable the positioning cambered surfaces 32 to be attached to the outer surfaces of the shaft sleeves 11 again.

2. Assembling process of the first member 1 and the second member 2 after the first assembling (i.e., mounting process of the pin 6 after the first mounting)

After first component 1 and second component 2 are assembled for the first time, when needing to assemble again, the location cambered surface 32 of two setting elements 31 of utilization symmetry leads and fixes a position to when two location cambered surfaces 32 and two axle sleeve 11's surface are laminated once more respectively, as the sign of pinhole 21 and axle sleeve 11 centering once more, so, can realize the centering of second component 2 and first component 1 pinhole fast, afterwards, penetrate round pin axle 6, and utilize stop device 5 to fix round pin axle 6, accomplish this round pin axle 6 installation promptly.

It can be seen that, in this embodiment, the first member 1 and the second member 2 can realize the rapid centering of the shaft sleeve 11 and the pin hole 21 based on the guiding and positioning functions of the positioning arc surface 32 in each assembling process after the first assembling, without depending on the vision and experience, and without the assistance of other parts, so that the efficiency is high and accurate, the problem of determining whether the pin hole is centered by adopting a visual method and having a large error is effectively solved, the parts are prevented from being damaged due to inaccurate centering, meanwhile, the problem of low assembling efficiency due to the fact that the positions of the members are manually and repeatedly finely adjusted is effectively solved, and the requirement of frequent rapid disassembly and assembly of modular mechanical equipment such as a walking excavator is met.

Based on the pin shaft assembly 10 of the foregoing embodiments, the present application also provides an engineering machine and an assembling method of the pin shaft assembly 10.

The engineering machine comprises the pin shaft assembly 10 of the embodiment of the application. As an example, the work machine is a walking excavator.

Referring additionally to fig. 6, the present application provides a method of assembling the pin assembly 10, including:

s100, assembling the first component 1 and the second component 2 for the first time, visually judging that the first component 1 and the second component 2 are aligned in the first assembling process, then penetrating the pin shaft 6 through the shaft sleeve 11 and the pin hole 21 and fixing, then attaching the positioning cambered surface 32 of the positioning piece 31 to the outer surface of the shaft sleeve 11, and fixing the positioning piece 31 on the second component 2;

s200, reassembling the first component 1 and the second component 2, guiding and positioning by using the positioning arc surface 32 of the positioning piece 31 in the reassembling process to enable the shaft sleeve 11 and the pin hole 21 to be aligned, and then penetrating the pin shaft 6 through the shaft sleeve 11 and the pin hole 21 and fixing.

The above description is only exemplary of the application and should not be taken as limiting the application, and any modifications, equivalents, improvements and the like that are made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A pin assembly (10), comprising:

the first component (1), the first component (1) is provided with a shaft sleeve (11);

the second component (2), the second component (2) is provided with a pin hole (21) used for being matched with the shaft sleeve (11);

a pin (6), wherein the pin (6) penetrates through the shaft sleeve (11) and the pin hole (21) to connect the first member (1) and the second member (2);

the positioning device (3) comprises a positioning piece (31), the positioning piece (31) is movably arranged on the second component (2), the positioning piece (31) is provided with a positioning arc surface (32), and the positioning arc surface (32) is matched with the outer surface of the shaft sleeve (11) and is used for being attached to the outer surface of the shaft sleeve (11) when the pin hole (21) is aligned with the shaft sleeve (11); and

the adjusting mechanism (35) is arranged on the second component (2) and comprises an installation part (36) and an adjusting part (37), the installation part (36) is fixed on the second component (2), and the adjusting part (37) is movably arranged on the installation part (36) and coupled with the positioning part (31) so as to adjust the position of the positioning part (31) and enable the positioning arc surface (32) to be close to or far away from the center of the shaft sleeve (11) during action.

2. A pin assembly (10) as claimed in claim 1, wherein the locating member (31) is provided with an elongate aperture (33), and a fastener (4) is passed through the elongate aperture (33) to secure the locating member (31) to the second component (2).

3. A pin assembly (10) according to claim 2, wherein the elongate hole (33) is an oblong hole (34).

4. The pin assembly (10) of claim 1, wherein the adjustment member (37) comprises a threaded connector (38), the threaded connector (38) being threadably connected to the mounting member (36) and being coupled to the positioning member (31) to adjust the position of the positioning member (31) during screwing.

5. The pin assembly (10) of claim 4, characterized in that the threaded connection (38) comprises an adjusting bolt (39).

6. The pin assembly (10) according to claim 1, wherein two bushings (11) are provided on the first member (1), the two bushings (11) are located on two sides of the first member (1) along the axial direction of the pin hole (21), the pin assembly (10) comprises two positioning devices (3), and the two positioning devices (3) correspond to the two bushings (11) one by one.

7. A working machine, characterized in that it comprises a pin assembly (10) according to any one of claims 1-6.

8. A method of assembling a pin assembly (10) according to any one of claims 1-6, comprising:

assembling the first component (1) and the second component (2) for the first time, visually judging that the first component (1) and the second component (2) are aligned in the process of assembling for the first time, then enabling the pin shaft (6) to penetrate through the shaft sleeve (11) and the pin hole (21) and to be fixed, enabling a positioning arc surface (32) of the positioning piece (31) to be attached to the outer surface of the shaft sleeve (11), and fixing the positioning piece (31) on the second component (2);

and reassembling the first component (1) and the second component (2), guiding and positioning by utilizing a positioning arc surface (32) of a positioning piece (31) in the reassembling process to enable the shaft sleeve (11) and the pin hole (21) to be aligned, and then penetrating the pin shaft (6) through the shaft sleeve (11) and the pin hole (21) and fixing.