CN217761731U - Shaft sleeve and engineering machinery - Google Patents

Abstract

The utility model provides an axle sleeve and engineering machine tool, wherein, the axle sleeve is suitable for the assembly in the shaft hole to the axle sleeve includes: a barrel; the first groove and the second groove are arranged on the outer wall of the barrel body, the first groove extends along the axial direction of the barrel body, the second groove extends along the circumferential direction of the barrel body, and the first groove and the second groove are suitable for enabling the inner wall of the shaft hole to deform after the shaft sleeve is assembled. In the structure, the outer side wall of the barrel is provided with the first groove and the second groove, when the shaft sleeve is assembled, the shaft sleeve is arranged in the shaft hole in an interference mode, the shaft hole inner wall deforms and then presses into the first groove and the second groove, the contact area between the shaft sleeve and the shaft hole is increased, friction force between the shaft sleeve and the shaft hole is increased, and therefore the shaft sleeve can be prevented from moving outwards relative to the shaft hole.

Description

Shaft sleeve and engineering machinery

Technical Field

The utility model relates to a transmission connecting piece technical field, concretely relates to axle sleeve and engineering machine tool.

Background

In the hydraulic excavator, a movable arm is hinged with a hinged point of a bucket rod through a pin shaft, the pin shaft is provided with a shaft sleeve, and the shaft sleeve is arranged in a shaft hole of the bucket rod in an interference manner to play roles of supporting and abrasion resistance. Because there is more impact in hydraulic shovel's operational environment, can lead to the axle sleeve to scurry outward for the shaft hole after using for a period. The shaft sleeve is shifted outwards, so that the bucket rod shakes, even the movable arm is abraded, and the service life of the hydraulic excavator is affected.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the excavator among the prior art and using a period after, the axle sleeve scurries outward for the shaft hole, leads to the dipper to rock and the defect of swing arm wearing and tearing to provide an axle sleeve and engineering machine tool.

In order to solve the problem, the utility model provides a shaft sleeve, shaft sleeve are suitable for the assembly in the shaft hole, and the shaft sleeve includes: a barrel; the first groove and the second groove are arranged on the outer wall of the barrel body, the first groove extends along the axial direction of the barrel body, the second groove extends along the circumferential direction of the barrel body, and the first groove and the second groove are suitable for enabling the inner wall of the shaft hole to deform after the shaft sleeve is assembled.

Optionally, in the axial direction of the cylinder, the cylinder has a press-in side, wherein the end side wall of the first groove close to the press-in side is a straight wall; and/or the side wall of the end part of the second groove close to the pressing side is a straight wall.

Optionally, in an axial direction along the barrel, the barrel has an press-in side, wherein an end side wall of the first groove away from the press-in side is an inclined wall; and/or the side wall of the second groove far from the pressing side is an inclined wall.

Optionally, the barrel has a press-in side in an axial direction of the barrel, wherein an inclination angle of an end side wall of the first groove far from the press-in side is larger than an inclination angle of an end side wall of the first groove near the press-in side; and/or the inclination angle of the side wall of the second groove far away from the pressing side is larger than that of the side wall of the second groove close to the pressing side.

Optionally, in an axial direction along the barrel, the barrel has a press-in side, an outer edge of an end face of the barrel facing the press-in side is provided with a chamfer, and the first groove extends through the chamfer.

Optionally, the groove depth of the first and second grooves is in the range of 0.5mm to 2 mm.

Optionally, the first groove is a plurality of grooves, and the plurality of first grooves are arranged at intervals along the circumference of the cylinder.

Optionally, the second recess is an annular recess.

Optionally, the shaft sleeve further comprises an oil filling groove, the oil filling groove is arranged on the outer side wall of the barrel and extends along the circumferential direction of the barrel, an oil passing hole is formed in the bottom wall of the oil filling groove and is communicated with the inner space of the barrel, the barrel is provided with a pressing-in side along the axial direction of the barrel, and the side wall, close to the pressing-in side, of the oil filling groove is a straight wall; and/or the side wall of the oil filling groove far away from the pressing side is an inclined wall; and/or the angle of inclination of the sidewall of the filler neck remote from the pressure side is greater than the angle of inclination of the sidewall of the filler neck adjacent to the pressure side.

Optionally, the first groove includes a first section and a second section, which are respectively located on both sides of the oil filler groove in the axial direction of the barrel.

Optionally, the shaft sleeve further comprises a plurality of oil storage tanks, and the plurality of oil storage tanks are arranged on the inner side wall of the barrel body and are arranged in an array.

The utility model also provides an engineering machine tool, including foretell axle sleeve.

Optionally, the engineering machine is an excavator, the excavator comprises a movable arm and a bucket rod, a rotating shaft is arranged at the end of the movable arm, a shaft hole is formed in the end of the bucket rod, a shaft sleeve is sleeved outside the rotating shaft, and the shaft sleeve is installed in the shaft hole in an interference mode.

The utility model has the advantages of it is following:

1. utilize the technical scheme of the utility model, set up on the lateral wall of barrel with first recess and second recess, when the counter shaft sleeve is assembled, the axle sleeve interference is installed in the axle hole, impresses to first recess and second recess after the axle hole inner wall takes place to warp, and then makes the area of contact between axle sleeve and the axle hole increase, and frictional force between the two increases, consequently can prevent the axle sleeve for the outside drunkenness in axle hole. Consequently the technical scheme of the utility model the excavator among the prior art use a period after, the axle sleeve scurries outward for the shaft hole, leads to the dipper to rock and the defect of swing arm wearing and tearing.

2. The lateral wall that is close to the pressure side of barrel of first recess and second recess is straight wall to play the backstop effect to the deformation part of the inside wall in shaft hole, prevent that the barrel from shifting for the shaft hole.

3. The side walls of the first and second grooves, which are away from the press-in side of the cylinder, are inclined walls, thereby facilitating assembly.

4. The oiling groove not only has the effect of leading lubricating oil, also can play the anti-channeling effect to the barrel.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic perspective view of a shaft sleeve according to the present invention;

FIG. 2 shows a cross-sectional view of the bushing of FIG. 1;

FIG. 3 shows an enlarged view at A (i.e., at the first segment of the first groove) in FIG. 2;

FIG. 4 shows an enlarged view at B in FIG. 2 (i.e., at the second section of the first groove);

FIG. 5 shows an enlarged view at C (i.e., at the second groove) in FIG. 2;

FIG. 6 is an enlarged view of FIG. 2 at D (i.e., the oil sump);

FIG. 7 shows an enlarged view at E in FIG. 2; and

fig. 8 is a schematic view illustrating the structure of the shaft sleeve of fig. 1 engaged with the shaft hole.

Description of reference numerals:

10. a barrel; 101. pressing in the side; 20. a first groove; 21. a first stage; 22. a second section; 30. a second groove; 40. an oil injection groove; 41. an oil passing hole; 50. an oil storage tank; 100. and the shaft hole.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 7, the shaft sleeve of the present embodiment includes a cylinder 10, a first recess 20, and a second recess 30. Wherein, the first groove 20 and the second groove 30 are arranged on the outer wall of the cylinder 10, the first groove 20 extends along the axial direction of the cylinder 10, and the second groove 30 extends along the circumferential direction of the cylinder 10. Further, the first recess 20 and the second recess 30 are adapted to deform the inner wall of the shaft hole 100 after the bushing is assembled.

Utilize the technical scheme of the utility model, set up on the lateral wall of barrel 10 with first recess 20 and second recess 30, when the counter shaft sleeve is assembled, the axle sleeve interference is installed in shaft hole 100, impresses to first recess 20 and second recess 30 after the 100 inner walls in shaft hole take place to warp, and then makes the area of contact increase between axle sleeve and the shaft hole 100, and frictional force between the two increases, consequently can prevent that the axle sleeve from for the outside drunkenness in shaft hole 100. Consequently the technical scheme of the utility model excavator among the prior art has been solved and after using a period, the axle sleeve scurries outward for shaft hole 100, leads to the dipper to rock and the defect of swing arm wearing and tearing.

It should be noted that the shaft sleeve in this embodiment is applied to the revolute pair connection. Specifically, a rotating shaft is mounted inside the cylinder 10, the rotating shaft can rotate relative to the cylinder 10, the cylinder 10 is mounted in the shaft hole 100 in an interference manner, and the cylinder 10 and the shaft hole 100 are relatively fixed, so that the rotating shaft can rotate relative to the shaft hole 100.

In addition, since the first groove 20 extends along the axial direction of the cylinder 10, the inner wall of the shaft hole 100 is deformed and then caught by the inner wall of the first groove 20 extending along the axial direction, thereby preventing the cylinder 10 from rotating relative to the shaft hole 100, that is, preventing the circumferential play.

Further, the bushing in this embodiment is preferably applied to a connection between a boom and a stick of an excavator. Of course, those skilled in the art will understand that any rotating pair structure of the mechanical structure may be used with the above-mentioned sleeve.

As shown in fig. 2 to 4, in the solution of the present embodiment, the cylinder 10 has a press-in side 101 in the axial direction of the cylinder 10. Wherein, the end side wall of the first groove 20 close to the press-in side 101 is a straight wall; and/or the side wall of the second groove 30 close to the press-in side 101 is a straight wall.

The "press-in side 101" refers to an end of the sleeve that first comes into contact with the shaft hole 100 when the sleeve is attached. In this embodiment, the proximal press-in side 101 of the cylinder 10 is the right end as viewed in fig. 1. Accordingly, the cartridge 10 also has an end remote from the press-in side 101. In the present exemplary embodiment, the press-in side 101 of the cylinder 10 is the left end as viewed in fig. 1.

In addition, the above-mentioned "end side wall of the first groove 20" means that the end of the first groove 20 has a side wall having a smaller area, that is, the end side wall of the first groove 20, since the first groove 20 is an elongated groove body extending in the axial direction of the cylinder 10.

Taking the second groove 30 shown in fig. 4 as an example, when the cylinder 10 is press-fitted into the shaft hole 100, the inner wall portion of the shaft hole 100 is deformed and pressed into the second groove 30. And the side wall of the second groove 30 close to the press-in side 101 is a straight wall, which can play a certain stopping role for the deformed part of the hole wall. Specifically, when the revolute pair is used for a while, the cylinder 10 tends to move outward with respect to the shaft hole 100, and the side wall of the second groove 30 near the press-in side 101 catches the deformed portion of the hole wall, thereby preventing the cylinder 10 from moving outward and making the fit between the cylinder 10 and the shaft hole 100 tighter.

It should be noted that the "straight wall" mentioned above means a side wall preferably arranged at 90 ° vertically. Of course, the angle of the side walls is large and close to vertical (e.g., 80 °, 85 °, etc.), and may also act as a stop for the deformed portion of the hole wall and act as a straight wall.

Further, the first groove 20 may also be formed in the manner described above, that is, the side wall of the end portion of the first groove 20 close to the press-in side 101 is formed as a straight wall.

Of course, as will be understood by those skilled in the art, since the first groove 20 extends along the axial direction, the end of the first groove 20 may penetrate the press-in side 101 of the cylinder 10 for the convenience of processing, and the end of the first groove 20 close to the press-in side 101 is an open structure and has no end side wall.

When the first groove 20 is processed to have a closed groove structure, a straight wall may be provided on an end side wall of the first groove 20 near the press-in side 101.

It should be noted that in some embodiments, which are not shown, only one of the first groove 20 or the second groove 30 may be arranged as described above, that is, only the end side wall of the first groove 20 close to the press-in side 101 is arranged as a straight wall, or only the side wall of the second groove 30 close to the press-in side 101 is arranged as a straight wall.

As shown in fig. 2, 4 and 5, in the solution of the present embodiment, the cylinder 10 has a press-in side 101 in the axial direction of the cylinder 10, wherein the end side wall of the first groove 20 away from the press-in side 101 is an inclined wall; and/or the side wall of the second recess 30 remote from the press-in side 101 is an inclined wall.

The meaning of the press-in side 101 of the cylinder 10 has already been explained in detail above and is not described in detail here.

Referring to fig. 4, taking the first groove 20 as an example, it can be understood by those skilled in the art that when the barrel 10 is installed, the inner wall of the shaft hole 100 passes through the first groove 20 from right to left as shown in fig. 3. In order to prevent the inner wall of the shaft hole 100 from being clamped in the first groove 20 after being deformed, the side wall of the end part of the first groove 20 far away from the pressing side 101 is an inclined wall, so that the inner wall of the shaft hole 100 can smoothly pass through the first groove 20 after being deformed, and the installation difficulty is reduced.

The "inclined wall" may be a plane or an arc. As can be seen from fig. 3, the end side wall of the first groove 20 away from the press-in side 101 in this embodiment is a cambered inclined wall.

As can be seen in fig. 5, the sidewall of the second groove 30 away from the press-in side 101 in this embodiment is arranged in the same manner as the first groove 20 described above. I.e. the side wall of the second groove 30 remote from the press-in side 101 is a cambered inclined wall.

It should be noted that, in some embodiments, which are not shown, only one of the first groove 20 or the second groove 30 may be arranged as described above, that is, only the end side wall of the first groove 20 away from the press-in side 101 is provided as an arc inclined wall, or only the side wall of the second groove 30 away from the press-in side 101 is provided as an arc inclined arm.

As shown in fig. 5, in the solution of the present embodiment, the cylinder has a pressing side 101 along the axial direction of the cylinder 10, wherein the inclination angle of the end side wall of the first groove 20 far from the pressing side 101 is larger than the inclination angle of the end side wall of the first groove 20 towards the pressing side 101; and/or the angle of inclination of the side wall of the second groove 30 facing away from the press-in side 101 is greater than the angle of inclination of the side wall of the second groove 30 facing towards the press-in side 101.

The meaning of the press-in side 101 of the cylinder 10 has already been explained in detail above and is not described in detail here.

It should be noted that the above-mentioned "(inclination angle of end portion) side wall" refers to an included angle between the inclination direction of the side wall and the vertical direction (i.e. the radial direction of the cylinder 10). It will be understood by those skilled in the art that when the side wall is a straight wall of 90 deg., the angle of inclination is 0 deg..

In conjunction with the above description and the structure of the second groove 30 shown in fig. 4, it can be understood by those skilled in the art that the inclination angle of the side wall of the second groove 30 away from the press-in side 101 should be as large as possible to reduce the difficulty of installation. The inclination angle of the side wall of the second groove 30 near the press-in side 101 should be as small as possible so that the side wall can act as a stopper for the deformed press-in portion of the inner side wall of the shaft hole 100 after the cylinder 10 is installed in the shaft hole 100.

Thus, in the present embodiment, the second groove 30 may be provided as: the inclination angle of the side wall of the second groove 30 remote from the press-in side 101 is larger than the inclination angle of the side wall of the second groove 30 close to the press-in side 101.

For example, the inclination angle of the side wall of the second groove 30 away from the press-in side 101 is 45 °, and the inclination angle of the side wall of the second groove 30 close to the press-in side 101 is 0 °.

For another example, the inclination angle of the side wall of the second groove 30 away from the press-in side 101 is 60 °, and the inclination angle of the side wall of the second groove 30 close to the press-in side 101 is 90 °.

Further, when the first concave groove 20 has a closed groove structure, the above arrangement may also be adopted, that is, the inclination angle of the end side wall of the first concave groove 20 far from the pressing side 101 is larger than the inclination angle of the end side wall of the first concave groove 20 near the pressing side 101.

For example, the inclination angle of the end side wall of the second groove 30 distant from the press-fitting side 101 is 45 °, and the inclination angle of the end side wall of the second groove 30 near the press-fitting side 101 is 0 °.

For another example, the inclination angle of the end side wall of the second concave groove 30 away from the press-in side 101 is 60 °, and the inclination angle of the end side wall of the second concave groove 30 close to the press-in side 101 is 30 °.

It should be noted that, in some embodiments, which are not shown, only one of the first flute 20 or the second flute 30 may be arranged in the manner described above, that is, only the inclination angle of the end side wall of the first flute 20 far from the press-in side 101 is set to be larger than the inclination angle of the end side wall of the first flute 20 near the press-in side 101. Alternatively, only the inclination angle of the side wall of the second groove 30 away from the press-in side 101 is set larger than the inclination angle of the side wall of the second groove 30 close to the press-in side 101.

Preferably, the groove depth of the first groove 20 and the second groove 30 in the present embodiment is in the range of 0.5mm to 2 mm. Specifically, after the cylinder 10 is inserted into the shaft hole 100, the deformation amount of the inner wall of the shaft hole 100 is not so large, and therefore the depths of the first groove 20 and the second groove 30 are not too deep, so as to ensure that the inner wall of the shaft hole 100 can contact with the bottom walls of the first groove 20 and the second groove 30 after being deformed.

As shown in fig. 1, in the solution of the present embodiment, the first groove 20 is multiple, and the multiple first grooves 20 are arranged at intervals along the circumferential direction of the cylinder 10. Preferably, three first grooves 20 are provided in the present embodiment, the three first grooves 20 are uniformly distributed, and adjacent first grooves 20 are arranged at an angle of 120 ° in the circumferential direction.

As shown in fig. 1, in the solution of the present embodiment, the second groove 30 is an annular groove. Specifically, the first groove 20 and the second groove 30 have overlapping portions.

In some embodiments, not shown, the second groove 30 may also be formed by a plurality of groove segments, which are spaced along the circumference of the cylinder 10.

As shown in fig. 2 and 8, in the solution of the present embodiment, the outer edge of the end surface of the cylinder 10 near the press-in side 101 is provided with a chamfer. And the first groove 20 extends through the chamfer. Specifically, the chamfer makes it easier to press the cylinder 10 into the shaft hole 100 with interference, thereby facilitating assembly. Meanwhile, after the side wall of the cylinder 10 is deformed, the first groove 20 may be pressed into the first groove 20 through the chamfered opening.

As shown in fig. 1 and fig. 2, in the solution of the present embodiment, the shaft sleeve further includes an oil filling groove 40, the oil filling groove 40 is disposed on the outer side wall of the cylinder 10 and extends along the circumferential direction of the cylinder 10, an oil passing hole 41 is disposed on the bottom wall of the oil filling groove 40, and the oil passing hole 41 is communicated with the inner space of the cylinder 10.

Specifically, the lubricating oil can flow to the oil passing hole 41 through the oil feeding groove 40 and to the inside of the cylinder 10. The lubricating oil can lubricate the cylinder 10 and the rotating shaft arranged in the cylinder 10, thereby ensuring smooth rotation.

In the embodiment of the present invention, as shown in fig. 6, since the inner wall of the axial hole 100 is deformed and also pressed into the grease groove 40 when the cylinder 10 is attached, the side walls of the grease groove close to the press-in side 101 and far from the press-in side 101 may be provided in the above-described manner.

Specifically, the sidewall of the oil filler groove 40 near the press-in side 101 may be provided as a straight wall so that the sidewall can function as a stopper against the deformed press-in portion of the inner sidewall of the shaft hole 100.

The side wall of the oil groove 40 remote from the press-in side 101 may be an inclined wall to reduce the difficulty of installation.

The angle of inclination of the sidewall of the oil filler spout 40 remote from the press-in side 101 may be set larger than the angle of inclination of the sidewall of the oil filler spout 40 close to the press-in side 101.

For example, the sidewall of the oil groove 40 remote from the press-in side 101 is inclined at an angle of 45, and the sidewall of the oil groove 40 close to the press-in side 101 is inclined at an angle of 0.

For another example, the sidewall of the oil sump 40 remote from the pressing-in side 101 is inclined at an angle of 60 °, and the sidewall of the oil sump 40 adjacent to the pressing-in side 101 is inclined at an angle of 30 °.

The above-described arrangement and operation principle for both side walls of the oil reservoir 40 are identical to those of the first recess 20 and the second recess 30, and therefore, will not be described in detail herein.

In the present embodiment, the oil groove 40 not only has an effect of guiding the lubricating oil, but also serves to prevent the cylindrical body 10 from moving relative to the shaft hole 100.

In the solution of the present embodiment, as shown in fig. 1, the first groove 20 includes a first section 21 and a second section 22, and the first section 21 and the second section 22 are respectively located on both sides of the oil tank 40 in the axial direction of the barrel 10. Specifically, the oil reservoir 40 divides the first groove 20 into two sections. One end of the first segment 21 penetrates the end of the cylinder 10 away from the press-in side 101, and the other end extends to the vicinity of the oil sump 40. One end of the second segment 22 penetrates the end of the cylinder 10 on the press-in side 101, and the other end extends to the oil reservoir 40.

As shown in fig. 3 and 4, it will be understood by those skilled in the art that the first section 21 has an open configuration, i.e., no end side wall, at its end remote from the press-in side 101 of the can 10, and the second section 22 has an open configuration, i.e., no end side wall, at its end adjacent to the press-in side 101 of the can 10. Therefore, in the present embodiment, the end wall of the first segment 21 closer to the press-fitting side 101 of the cylindrical body 10 is provided as a straight wall, and the end wall of the second segment 22 farther from the press-fitting side 101 of the cylindrical body 10 is provided as an inclined wall.

As shown in fig. 1 and 2, the shaft housing further includes a plurality of oil reservoirs 50, and the plurality of oil reservoirs 50 are disposed on the inner sidewall of the cylinder 10 and arranged in an array. Specifically, the oil reservoir 50 is recessed inward, and can function to store lubricating oil. The array arrangement described above means that a plurality of reservoirs 50 are formed in an arrangement of rows and columns.

The embodiment also provides the engineering machinery comprising the shaft sleeve.

As shown in fig. 8, preferably, the construction machine is an excavator, the excavator includes a movable arm and an arm, a rotating shaft is disposed at an end of the movable arm, a shaft hole 100 is disposed at an end of the arm, a shaft sleeve is sleeved outside the rotating shaft, and the shaft sleeve is installed in the shaft hole 100 in an interference manner.

Of course, other construction machines provided with a revolute pair may also adopt the above-described sleeve structure.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (12)

1. A bushing adapted to fit within a shaft bore (100), comprising:

a cylinder (10);

the shaft sleeve comprises a first groove (20) and a second groove (30), wherein the first groove (20) and the second groove (30) are arranged on the outer wall of the cylinder body (10), the first groove (20) extends along the axial direction of the cylinder body (10), the second groove (30) extends along the circumferential direction of the cylinder body (10), and the first groove (20) and the second groove (30) are suitable for deforming the inner wall of a shaft hole (100) after the shaft sleeve is assembled.

2. Bushing according to claim 1, characterized in that the cylinder (10) has a press-in side (101) in the axial direction of the cylinder (10), wherein,

the side wall of the end part of the first groove (20) close to the press-in side (101) is a straight wall; and/or the presence of a gas in the atmosphere,

the side wall of the second groove (30) close to the press-in side (101) is a straight wall.

3. Bushing according to claim 1, characterized in that the cylinder (10) has a press-in side (101) in the axial direction of the cylinder (10), wherein,

the side wall of the end part of the first groove (20) far away from the pressing side (101) is an inclined wall; and/or the presence of a gas in the atmosphere,

the side wall of the second groove (30) remote from the press-in side (101) is an inclined wall.

4. Bushing according to claim 1, characterized in that the cylinder has a press-in side (101) in the axial direction of the cylinder (10), wherein,

the inclination angle of the end side wall of the first groove (20) far away from the press-in side (101) is larger than the inclination angle of the end side wall of the first groove (20) near the press-in side (101); and/or the presence of a gas in the gas,

the inclination angle of the side wall of the second groove (30) far away from the press-in side (101) is larger than the inclination angle of the side wall of the second groove (30) near the press-in side (101).

5. Bushing according to any one of claims 1 to 4, wherein the cylinder (10) has a press-in side (101) in the axial direction of the cylinder (10), the outer edge of the end face of the cylinder (10) facing the press-in side (101) being provided with a chamfer, the first groove (20) extending through the chamfer.

6. Bushing according to any of claims 1 to 4, characterized in that the first recess (20) and the second recess (30) have a groove depth in the range of 0.5mm to 2 mm.

7. Bushing according to any of claims 1 to 4, characterized in that the first recess (20) is a plurality of first recesses (20) which are arranged at intervals along the circumference of the cylinder (10).

8. Bushing according to any of claims 1-4, wherein the second recess (30) is an annular groove.

9. The bushing as claimed in any of claims 1 to 4, wherein said bushing further comprises an oil filling groove (40), said oil filling groove (40) is disposed on an outer sidewall of said shell (10) and extends along a circumferential direction of said shell (10), an oil passing hole (41) is disposed on a bottom wall of said oil filling groove (40), said oil passing hole (41) is communicated with an inner space of said shell (10), said shell (10) has a pressing-in side (101) in an axial direction of said shell (10), wherein,

the side wall of the oil filling groove (40) close to the pressing side (101) is a straight wall; and/or the presence of a gas in the gas,

the side wall of the oil filling groove (40) far away from the pressing side (101) is an inclined wall;

and/or the presence of a gas in the gas,

the inclination angle of the side wall of the oil tank (40) far away from the press-in side (101) is larger than the inclination angle of the side wall of the oil tank (40) near the press-in side (101).

10. Bushing according to claim 9, characterized in that the first recess (20) comprises a first section (21) and a second section (22), the first section (21) and the second section (22) being located on either side of the oil groove (40) in the axial direction of the cartridge (10), respectively.

11. A working machine, comprising a sleeve according to any one of claims 1-10.

12. The engineering machine according to claim 11, wherein the engineering machine is an excavator, the excavator comprises a movable arm and an arm, a rotating shaft is arranged at an end of the movable arm, a shaft hole (100) is arranged at an end of the arm, the shaft sleeve is sleeved outside the rotating shaft, and the shaft sleeve is installed in the shaft hole (100) in an interference manner.

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