Split type guide wheel of skid steer loader

Abstract

The utility model discloses a split type guide wheel of a skid steer loader, which belongs to the technical field of crawler-type engineering machinery and comprises a wheel shaft, a shaft sleeve is rotatably sleeved on the wheel shaft, a hub is sleeved on the shaft sleeve, the shaft sleeve is in interference fit with the hub, and the shaft sleeve is divided into a straight tube section and a flange section. The straight tube section is sequentially provided with a low-carbon steel metal matrix, a copper layer and a POK coating from outside to inside, the flange section is sequentially provided with a low-carbon steel metal matrix, a copper layer and a POK coating from one side of the straight tube section to outside, and the hub and the rim of the split type guide wheel of the skid steer loader are formed by forging. The guide wheel has the advantage of solving the problems of insufficient strength and quick failure during high-speed walking of the existing guide wheel of the skid steer loader.

Description

Technical Field

[0001] The utility model relates to the technical field of crawler construction machinery, in particular to a split idler wheel for a skid steer loader. Background Art

[0002] The idler wheel is a core component of crawler construction machinery. Its main functions are to guide the correct rotation of the crawler, prevent the crawler from running off track and derailing, and at the same time play a role in tensioning and buffering the impact of external loads on the whole machine. Its service life directly affects the reliability and working efficiency of the whole machine.

[0003] At present, most of the idler wheels used in skid steer loaders in the industry adopt a casting structure, which is prone to internal defects such as air holes, cracks, and sand holes, resulting in a reduction in the strength of the idler wheel and affecting the service life of the product. Moreover, traditional idler wheels mostly use low-carbon steel / CuPb10Sn10 bimetallic bushings, which not only have high costs, but also it is difficult to form a complete lubricating oil film during high-speed running. The wear between the wheel axle and the bushing increases sharply, and the temperature rises rapidly, accelerating the aging of the sealing components, losing the sealing ability and causing oil leakage, resulting in the rapid failure of the idler wheel. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is the technical problem mentioned in the above background art, and it provides a split idler wheel for a skid steer loader to solve the problems of insufficient strength of the current idler wheel for skid steer loaders and rapid failure during high-speed running.

[0005] The technical solution provided by the utility model is as follows: a split idler wheel for a skid steer loader includes a wheel axle, a bushing is rotatably sleeved on the wheel axle, a hub is sleeved on the bushing, the bushing and the hub are in interference fit, the bushing is divided into a straight cylinder section and a flange section, the material of the straight cylinder section from outside to inside is a low-carbon steel metal matrix, a copper layer and a POK coating, and the material of the flange section from one side of the straight cylinder section to the outside is a low-carbon steel metal matrix, a copper layer and a POK coating. The hub is formed by forging.

[0006] In some embodiments, a rim is fixedly sleeved on the hub, an oil cavity is arranged inside the hub, an oil through hole is arranged on the rim, and the oil through hole communicates with the oil cavity. The rim is formed by forging.

[0007] In some embodiments, the hub is arranged in the middle of the wheel axle, and end caps I and II are also sleeved on both sides of the hub on the wheel axle. Both end caps I and II are limited by snap rings.

[0008] In some embodiments, an annular floating oil seal is arranged between end cap I and the hub, and an annular floating oil seal is arranged between end cap II and the hub.

[0009] In some embodiments, there are two bushings, which are oppositely installed on the inner sides of both ends of the hub, and the flange sections of the two bushings abut against end cap I and end cap II.

[0010] In some embodiments, there are four sets of annular oil seals, which are respectively located on the inner sides of both ends of the hub and on the inner sides where end cover I and end cover II are close to each other.

[0011] In some embodiments, there are screw holes leading to the oil cavity on end cover I and end cover II, and the screw holes are sealed by screw plugs.

[0012] The advantages of the present utility model compared with the prior art are as follows: 1. The hub and rim of the guide wheel adopt a forging structure, which not only solves the problems of internal defects such as porosity, cracks, and sand holes easily generated in the casting structure, but also has good heat treatment consistency of the product, higher yield rate and lower cost; 2. The guide wheel uses a new type of bushing made of low-carbon steel / CuPb10Sn10 / POK. POK is a crystalline engineering plastic with extremely high wear resistance, corrosion resistance, and self-lubrication.

[0013] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a split guide wheel of a skid steer loader according to an embodiment of the present utility model;

[0015] Figure 2 is Figure 1 a schematic structural diagram of the hub and rim shown in ;

[0016] Figure 3 is Figure 1 a schematic structural diagram of the bushing shown in ;

[0017] Figure 4 is Figure 1 a schematic side view of the split guide wheel of the skid steer loader shown in.

[0018] In the drawings: 1. Rim; 2. Axle; 3. Retaining ring; 4. End cover I; 5. Floating oil seal; 6. Bushing; 7. End cover II; 8. Oil cavity; 9. Oil through hole; 10. Screw plug; 11. Hub; 12. Low-carbon steel metal matrix; 13. Copper layer; 14. POK coating; 100. Split guide of skid steer loader. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following is a further detailed description of the present utility model.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0021] Combined Figure 1 、 Figure 4 As shown, a split idler wheel 100 for a skid steer loader, the hub and the rim are formed by forging. The forging structure not only solves the problems of internal defects such as porosity, cracks, and sand holes that are prone to occur in the casting structure, but also has good heat treatment consistency for the product, higher yield rate and lower cost.

[0022] The hub 11 and the rim 1 are fixedly connected by welding. A bushing 6 is press-fitted into the hub 11 by a press. A wheel axle 2 is rotatably connected inside the bushing 6.

[0023] Combined Figure 2 As shown, an oil cavity 8 is provided inside the hub 11. An oil through hole 9 is provided on the rim 1. The oil through hole 9 communicates with the oil cavity 8. Screw holes leading to the oil cavity 8 are provided on the end cover Ⅰ 4 and the end cover Ⅱ 7, and the screw holes are sealed by screw plugs 10.

[0024] The hub 11 is sleeved on the middle part of the wheel axle 2. End covers Ⅰ 4 and Ⅱ 7 are also sleeved on the wheel axle 2 on both sides of the hub 11. The end covers Ⅰ 4 and Ⅱ 7 are both limited by retaining rings 3.

[0025] An annular floating oil seal 5 is provided between the end cover Ⅰ 4 and the hub 11. An annular floating oil seal 5 is provided between the end cover Ⅱ 7 and the hub 11. Four sets of annular oil seals are provided, which are respectively located on the inner sides of both ends of the hub 11 and on the inner sides where the end cover Ⅰ 4 and the end cover Ⅱ 7 are close to each other.

[0026] Two bushings 6 are provided, and are press-fitted into the inner sides of both ends of the hub 11 relatively. The flange sections of the two bushings 6 abut against the end cover Ⅰ 4 and the end cover Ⅱ 7.

[0027] Combined Figure 3 As shown, the bushing 6 is divided into a straight cylinder section and a flange section. The material of the straight cylinder section from outside to inside is a low-carbon steel metal matrix 12, a copper layer 13, and a POK coating 14. The material of the flange section from the side of the straight cylinder section outwards is a low-carbon steel metal matrix 12, a copper layer 13, and a POK coating 14. The POK coating 14 can improve the oil film formation ability, so that a stable lubricating oil film can be formed when the idler wheel rotates at high speed, conduct the heat generated during the rotation in time, prevent the accumulation of heat, ensure the stability of the internal temperature of the wheel body, reduce the possibility of the sealing function failure caused by temperature aging during the long-term use of the sealing component, and improve the service life of the idler wheel. In addition, at the initial stage of the movement of the idler wheel, when the oil film is not fully formed, due to its excellent self-lubricity and wear resistance, this coating will not wear and fall off due to friction, ensuring the cleanliness inside the wheel body. At the same time, when using this material coating for the bushing 6, the thickness of the copper layer 13 and the roughness requirement of the mating surface with the wheel axle 2 can be reduced. Compared with the conventional idler wheel, the thickness of the copper layer 13 can be reduced by 50%, and the surface finish of the wheel axle 2 reaches Ra1.6 to be usable, and the grinding process can be omitted, reducing the manufacturing cost.

[0028] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A split idler wheel (100) for a skid steer loader, comprising a wheel axle (2), characterized in that: A bushing (6) is rotatably sleeved on the axle (2). A hub (11) is sleeved on the bushing (6). The bushing (6) and the hub (11) are in interference fit. The bushing (6) is divided into a straight cylinder section and a flange section. The material of the straight cylinder section from outside to inside is a low-carbon steel metal matrix (12), a copper layer (13), and a POK coating (14). The material of the flange section from the side of the straight cylinder section outwards is a low-carbon steel metal matrix (12), a copper layer (13), and a POK coating (14). The hub (11) is formed by forging.

2. The split idler wheel (100) of a skid steer loader according to claim 1, characterized in that: A rim (1) is fixedly sleeved on the hub (11). An oil cavity (8) is provided inside the hub (11). An oil through hole (9) is provided on the rim (1). The oil through hole (9) communicates with the oil cavity (8). The rim (1) is formed by forging.

3. The split idler wheel (100) of a skid steer loader according to claim 2, characterized in that: The hub (11) is arranged in the middle of the axle (2). End caps I (4) and end caps II (7) are also sleeved on both sides of the hub (11) on the axle (2). The end caps I (4) and the end caps II (7) are both limited by snap rings (3).

4. The split idler (100) of a skid steer loader according to claim 3, characterized in that: An annular floating oil seal (5) is provided between the end cap I (4) and the hub (11). An annular floating oil seal (5) is provided between the end cap II (7) and the hub (11).

5. The split idler wheel (100) of a skid steer loader according to claim 4, characterized in that: There are two bushings (6), which are oppositely installed on the inner sides of both ends of the hub (11). The flange sections of the two bushings (6) abut against the end cap I (4) and the end cap II (7).

6. The split idler wheel (100) of a skid steer loader according to claim 3, wherein: There are four sets of annular oil seals, which are respectively located on the inner sides of both ends of the hub (11) and on the inner sides where the end cap I (4) and the end cap II (7) are close to each other.

7. The split idler (100) of a skid steer loader according to claim 3, wherein: The end cap I (4) and the end cap II (7) are provided with screw holes leading to the oil cavity (8). The screw holes are sealed by screw plugs (10).

Images