Front transmission shaft bushing for forklift

Abstract

The utility model discloses a front transmission shaft bushing for a forklift, which comprises an outer bushing and an inner bushing sleeved inside the outer bushing, a spiral oil storage track is arranged on the inner ring surface of the inner bushing, and an assembly structure is arranged between the outer bushing and the inner bushing. After the inner bushing is mounted in the outer bushing by the aid of the assembly component, the limiting component limits rotation of the inner bushing in the outer bushing, then the inner bushing is mounted on the front transmission shaft of the forklift, the inner bushing rotates with the shaft, the outer bushing is in interference fit with the seat, and the inner bushing is prevented from rotating when the inner bushing is seriously abraded. Compared with the prior art, by means of the detachable outer lining and the inner lining, when the inner lining is damaged, the assembly cap can be detached, the inner lining is taken out, at the moment, the outer lining in interference fit with a seat is not moved, the inner lining is taken out, and the outer lining in interference fit with the seat is not moved. Therefore, the neck bush can be quickly and conveniently replaced, and meanwhile, only the neck bush is replaced, so that the replacement cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bushings, in particular to a front transmission shaft bushing for a forklift. Background Art

[0002] In moving parts, parts wear due to long-term friction. When the clearance between the shaft and the hole wears to a certain extent, the parts must be replaced. Therefore, designers choose materials with lower hardness and better wear resistance as sleeves or bushings during design, which can reduce the wear of the shaft and seat.

[0003] When the front drive shaft of a forklift is used for a long time, the bushing needs to be replaced because it is worn to a certain extent. However, the conventional installation method of the bushing is that the bushing and the seat are interference fit, and the bushing and the shaft are clearance fit. Therefore, when the bushing is removed, the outer cylindrical surface of the bushing and the seat with interference fit is difficult to remove. Therefore, we propose a front drive shaft bushing for forklifts that is easy to disassemble. Utility Model Content

[0004] The utility model aims to provide a front transmission shaft bushing for a forklift to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A front drive shaft bushing for a forklift, comprising an outer bushing and an inner bushing sleeved inside the outer bushing, the inner ring surface of the inner bushing being provided with a spiral oil storage track, an assembly structure being provided between the outer bushing and the inner bushing, and an oil supply structure being provided on the inner ring surface of the outer bushing for supplying oil to the spiral oil storage track;

[0007] The assembly structure is composed of a limit assembly and an assembly assembly. The assembly assembly includes an assembly cap. The surface of the assembly cap is threadedly connected with an assembly bolt. The left end of the outer bushing is provided with a threaded hole adapted to the assembly bolt.

[0008] The limiting assembly comprises limiting blocks which are fixedly mounted on the outer annular surface of the inner bushing in a circumferential array, and the inner walls of the outer bushing and the assembly cap are both provided with limiting grooves which are matched with the limiting blocks.

[0009] Preferably, the oil supply structure consists of an oil storage component and an oil supply component.

[0010] Preferably, the oil storage assembly includes an oil storage tank opened on the inner wall of the outer bushing, the oil storage tank and the limit groove are connected to each other, an oil inlet channel is opened at the left end of the outer bushing, the oil inlet channel is connected to the interior of the oil storage tank, and an oil filling hole is opened at the left end of the assembly cap, and a sealing cap is threadedly connected to the inner wall of the oil filling hole.

[0011] Preferably, the oil supply assembly comprises oil supply holes which are equidistantly arranged on the inner wall of the spiral oil storage track, and the oil supply holes extend to the outside of the inner bushing.

[0012] Preferably, a first sealing ring is provided on the contact surface between the left end of the inner sleeve and the inner wall of the assembly cap, and a second sealing ring is provided on the contact surface between the right end of the inner sleeve and the inner wall of the outer sleeve.

[0013] Preferably, the hardness of the inner sleeve is smaller than the hardness of the bearing, and the hardness of the outer sleeve is larger than the hardness of the inner sleeve.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model provides an outer bushing, an inner bushing and an assembly structure. After the inner bushing is installed inside the outer bushing by using the assembly component, the limit assembly will limit the rotation of the inner bushing inside the outer bushing. Then it is installed on the front drive shaft of the forklift. At this time, the inner bushing will rotate with the shaft, and the outer bushing will have an interference fit with the seat. When the inner bushing is severely worn, the assembly cap can be taken out by screwing out the assembly bolts, and then the inner bushing can be taken out from the outer bushing. Compared with the prior art, the device uses a detachable outer bushing and inner bushing. When the inner bushing is damaged, the assembly cap can be removed and the inner bushing can be taken out. At this time, the outer bushing that has an interference fit with the seat does not move, so that the inner bushing can be replaced quickly and conveniently. At the same time, only replacing the inner bushing can reduce the replacement cost.

[0016] 2. The utility model provides an oil supply structure. When the outer sleeve and the inner sleeve are assembled as one, butter can be injected into the oil storage tank through the oil filling hole. A large amount of butter can be stored in the oil storage tank. When the inner sleeve is heated, the butter will be converted into liquid and flow into the spiral oil storage track along the oil supply hole, so that the inner sleeve can be continuously supplied with oil, thereby extending the maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure proposed for the utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure of the inner liner proposed in the utility model;

[0019] Figure 3 This is a schematic diagram of the front cross-sectional structure of the assembly cap proposed in the utility model;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the outer bushing proposed for the utility model;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of the inner sleeve proposed in the utility model.

[0022] In the figure: 1 outer bushing, 2 inner bushing, 3 spiral oil storage track, 4 assembly cap, 5 assembly bolts, 6 threaded holes, 7 limit blocks, 8 limit grooves, 9 oil storage grooves, 10 oil inlet channels, 11 oil filling holes, 12 blocking caps, 13 oil supply holes, 14 first sealing rings, and 15 second sealing rings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Reference Figure 1-5 A front drive shaft bushing for a forklift comprises an outer bushing 1 and an inner bushing 2 sleeved inside the outer bushing 1, the hardness of the inner bushing 2 is less than the hardness of the bearing, the hardness of the outer bushing 1 is greater than the hardness of the inner bushing 2, thereby protecting the shaft, a spiral oil storage track 3 is provided on the inner ring surface of the inner bushing 2, an assembly structure is provided between the outer bushing 1 and the inner bushing 2, and the assembly structure is composed of a limit assembly and an assembly assembly.

[0026] The assembly component includes an assembly cap 4, the surface of which is threadedly connected with an assembly bolt 5, a threaded hole 6 matching the assembly bolt 5 is provided at the left end of the outer bushing 1, and the limit assembly includes a limit block 7 fixedly installed in a circular array on the outer ring surface of the inner bushing 2, and the inner walls of the outer bushing 1 and the assembly cap 4 are both provided with a limit groove 8 matching the limit block 7.

[0027] Place the inner bushing 2 into the outer bushing 1. At this time, the limit block 7 will be inserted into the limit groove 8, so as to limit the inner bushing 2 and prevent the inner bushing 2 from sliding inside the outer bushing 1. Then insert the assembly cap 4 into the surface of the inner bushing 2 and tighten the assembly bolt 5, so that the inner bushing 2 can be installed inside the outer bushing 1.

[0028] After the inner bushing 2 is installed inside the outer bushing 1 by using the assembly component, the limit assembly will limit the rotation of the inner bushing 2 inside the outer bushing 1, and then it will be installed on the front drive shaft of the forklift. At this time, the inner bushing 2 will rotate with the shaft, and the outer bushing 1 will have an interference fit with the seat. When the inner bushing 2 is severely worn, the assembly cap 4 can be removed by screwing out the assembly bolts 5, and then the inner bushing 2 can be taken out from the outer bushing 1. Compared with the prior art, the device uses a detachable outer bushing 1 and inner bushing 2. When the inner bushing 2 is damaged, the assembly cap 4 can be removed to take out the inner bushing 2. At this time, the outer bushing 1 that has an interference fit with the seat does not move, so that the inner bushing 2 can be replaced quickly and conveniently. At the same time, only replacing the inner bushing 2 can reduce the replacement cost.

[0029] The inner annular surface of the outer bushing 1 is provided with an oil supply structure which can supply oil to the spiral oil storage track 3. The oil supply structure is composed of an oil storage component and an oil supply component. The oil storage component includes an oil storage tank 9 opened on the inner wall of the outer bushing 1. The oil storage tank 9 is connected with the limiting groove 8. An oil inlet channel 10 is opened at the left end of the outer bushing 1. The oil inlet channel 10 is connected with the inside of the oil storage tank 9. An oil filling hole 11 is opened at the left end of the assembly cap 4. The inner wall of the oil filling hole 11 is threadedly connected with a blocking cap 12.

[0030] After the inner bushing 2 is installed inside the outer bushing 1, butter can be injected into the oil filling hole 11. The butter will enter the oil storage tank 9 along the oil inlet channel 10 and fill the oil storage tank 9. The oil supply assembly includes oil supply holes 13 equidistantly arranged on the inner wall of the spiral oil storage track 3, and the oil supply holes 13 extend to the outside of the inner bushing 2. Excess butter inside the oil storage tank 9 will enter the spiral oil storage track 3 along the oil supply holes 13.

[0031] A first sealing ring 14 is provided at the contact surface between the left end of the inner sleeve 2 and the inner wall of the assembly cap 4, and a second sealing ring 15 is provided at the contact surface between the right end of the inner sleeve 2 and the inner wall of the outer sleeve 1. When the inner sleeve 2 is installed inside the outer sleeve 1, the first sealing ring 14 and the second sealing ring 15 will prevent the butter inside the oil storage tank 9 from overflowing along the two ends of the outer sleeve 1.

[0032] When the outer bushing 1 and the inner bushing 2 are assembled as one, butter can be injected into the oil storage tank 9 through the oil filling hole 11. A large amount of butter can be stored in the oil storage tank 9. When the inner bushing 2 is heated, the butter will be converted into liquid and flow into the spiral oil storage track 3 along the oil supply hole 13, so that the inner bushing 2 can be continuously supplied with oil, thereby extending the maintenance time.

[0033] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A front drive shaft bushing for a forklift, comprising an outer bushing (1) and an inner bushing (2) sleeved inside the outer bushing (1), characterized in that: The inner ring surface of the inner bushing (2) is provided with a spiral oil storage track (3), an assembly structure is provided between the outer bushing (1) and the inner bushing (2), and the inner ring surface of the outer bushing (1) is provided with an oil supply structure capable of supplying oil to the spiral oil storage track (3); The assembly structure is composed of a limiting component and an assembly component, wherein the assembly component comprises an assembly cap (4), a surface of the assembly cap (4) is threadedly connected with an assembly bolt (5), and a threaded hole (6) adapted to the assembly bolt (5) is formed at the left end of the outer bushing (1); The limiting assembly comprises limiting blocks (7) fixedly mounted in a circumferential array on the outer ring surface of the inner bushing (2); the inner walls of the outer bushing (1) and the assembly cap (4) are both provided with limiting grooves (8) matched with the limiting blocks (7).

2. The front drive shaft bushing for a forklift according to claim 1, characterized in that: The oil supply structure consists of an oil storage component and an oil supply component.

3. The front drive shaft bushing for a forklift according to claim 2, characterized in that: The oil storage assembly comprises an oil storage tank (9) provided on the inner wall of the outer bushing (1), the oil storage tank (9) and the limit groove (8) being connected to each other, an oil inlet passage (10) being provided at the left end of the outer bushing (1), the oil inlet passage (10) being connected to the inside of the oil storage tank (9), and an oil filling hole (11) being provided at the left end of the assembly cap (4), the inner wall of the oil filling hole (11) being threadedly connected to a blocking cap (12).

4. The front drive shaft bushing for a forklift according to claim 2, characterized in that: The oil supply assembly comprises oil supply holes (13) which are equidistantly arranged on the inner wall of the spiral oil storage track (3), and the oil supply holes (13) extend to the outside of the inner bushing (2).

5. The front drive shaft bushing for a forklift according to claim 1, characterized in that: A first sealing ring (14) is provided on the contact surface between the left end of the inner sleeve (2) and the inner wall of the assembly cap (4), and a second sealing ring (15) is provided on the contact surface between the right end of the inner sleeve (2) and the inner wall of the outer sleeve (1).

6. The front drive shaft bushing for a forklift according to claim 1, characterized in that: The hardness of the inner sleeve (2) is less than the hardness of the bearing, and the hardness of the outer sleeve (1) is greater than the hardness of the inner sleeve (2).

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