阅读说明：本技术 推土机用支重轮及其装配方法 (Thrust wheel for bulldozer and assembling method thereof ) 是由 王�华 郭海宁 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种推土机用支重轮及其装配方法,支重轮包括轮体、支轴和轴盖,所述轮体和所述支轴皆为回转类零件,所述轮体具有沿其轴向贯穿的轴孔,所述支轴穿套与所述轴孔内,且所述轮体能够沿其轴线旋转；所述轴盖分别位于所述轮体的两端并与所述支轴固定连接,所述轴盖与所述轮体之间设有浮动油封；所述支轴的中间设有突出的台阶,所述轮体设有可容置所述台阶的凹槽,所述台阶卡合于所述凹槽内以限制所述支轴的轴向窜动,通过将限位台阶设置到支轴的中间,可简化浮动油封的安装结构,并且可降低支轴的直径,而且中部的台阶在加工时的平行度会更高。(The invention discloses a thrust wheel for a bulldozer and an assembly method thereof, wherein the thrust wheel comprises a wheel body, a fulcrum shaft and a shaft cover, wherein the wheel body and the fulcrum shaft are rotary parts, the wheel body is provided with a shaft hole which penetrates through the wheel body along the axial direction of the wheel body, the fulcrum shaft is sleeved in the shaft hole, and the wheel body can rotate along the axis of the wheel body; the shaft covers are respectively positioned at two ends of the wheel body and fixedly connected with the support shaft, and a floating oil seal is arranged between the shaft covers and the wheel body; the middle of the support shaft is provided with a protruding step, the wheel body is provided with a groove capable of containing the step, the step is clamped in the groove to limit axial movement of the support shaft, the limiting step is arranged in the middle of the support shaft, the mounting structure of the floating oil seal can be simplified, the diameter of the support shaft can be reduced, and the parallelism of the step in the middle can be higher during processing.)

1. The utility model provides a thrust wheel for bull-dozer which characterized in that: the device comprises a wheel body (1), a support shaft (2) and a shaft cover (3), wherein the wheel body and the support shaft are rotary parts, the wheel body is provided with a shaft hole (11) which penetrates through the wheel body along the axial direction of the wheel body, the support shaft penetrates through the shaft hole, and the wheel body can rotate along the support shaft;

the two shaft covers are provided with through holes (31), the two shaft covers are respectively positioned at two ends of the wheel body and are sleeved on the support shaft to be fixedly connected with the support shaft, and a floating oil seal (4) is arranged between the shaft covers and the wheel body;

the middle of the support shaft is provided with a protruding step (21), the wheel body is provided with a groove (11) capable of containing the step, and the step is clamped in the groove to limit axial movement of the support shaft.

2. The thrust wheel for a bulldozer according to claim 1, characterized in that: a copper sleeve (5) is arranged between the support shaft and the wheel body, the copper sleeve is relatively fixed with the wheel body, and a gap is formed between the support shaft and the copper sleeve.

3. The thrust wheel for a bulldozer according to claim 2, characterized in that: including iron sleeve (6), copper sheathing fixed mounting in the iron sleeve, iron sleeve fixed connection in the wheel body.

4. The thrust wheel for a bulldozer according to claim 3, characterized in that: the iron sleeve is equipped with two, two the iron sleeve is respectively certainly both ends in shaft hole insert and fixed connection, two distance between the iron sleeve constitutes the recess.

5. The thrust wheel for a bulldozer according to claim 1 or 4, characterized in that: the unilateral clearance between the step and the groove is 0.3-0.5 mm.

6. The thrust wheel for a bulldozer according to claim 1, characterized in that: the shaft cover is connected with the fulcrum shaft in an interference fit mode.

7. The thrust wheel for a bulldozer according to claim 3, characterized in that: the iron sleeve and the wheel body are connected in an interference fit mode and fixedly connected with the wheel body through a bolt (7).

8. The thrust wheel for a bulldozer according to claim 3, characterized in that: the hardness of the iron sleeve is less than that of the wheel body.

9. A method of assembling the thrust wheel of claim 3 or 7, wherein: when the thrust wheel is assembled, the copper sleeve is pressed into the iron sleeve to complete the assembly of two iron sleeve assemblies, then the iron sleeve with the pressed copper sleeve is pressed into the wheel body and is fixedly fixed through the bolt, then the thrust shaft is inserted from one end of the wheel body, which is not provided with the iron sleeve, then the other iron sleeve is pressed into the wheel body and is fixed through the bolt, then the floating oil seals at two ends are installed, and finally the shaft cover is pressed;

and after the assembly is finished, lubricating oil is injected into the wheel body, and the volume of the injected lubricating oil is 70 +/-2% of the volume of the oil storage cavity of the thrust wheel.

10. The assembling method of a track roller according to claim 9, wherein: and after the copper sleeve is pressed into the iron sleeve, drilling a hole at the flange edge of the copper sleeve, and pressing a positioning pin into the drilled hole.

Technical Field

The invention belongs to the technical field of engineering machinery, and particularly relates to a thrust wheel for a bulldozer and an assembly method thereof.

Background

The thrust wheels are used to support the weight of the body of the construction machine such as an excavator, a bulldozer, etc., and roll on the guide rails (track links) or the track faces of the track, and also to restrain the track to prevent lateral slipping, and the thrust wheels force the track to slip on the ground when the construction machine is turned.

Disclosure of Invention

The invention mainly solves the technical problem of providing a thrust wheel for a bulldozer, wherein a protruding step is arranged in the middle of a supporting shaft, a wheel body is provided with a groove capable of accommodating the step, the step is clamped in the groove to limit axial movement of the supporting shaft, a limiting step is arranged in the middle of the supporting shaft, the mounting structure of a floating oil seal can be simplified, the diameter of the supporting shaft can be reduced, and the precision of the step in the middle during processing can be higher.

In order to solve the technical problem, the invention adopts a technical scheme as follows:

a kind of bulldozer thrust wheel, including wheel body, fulcrum and shaft cover, said wheel body and said fulcrum are all revolving type parts, said wheel body has axle hole that run through along its axial, said fulcrum is worn and set in said axle hole, and said wheel body can rotate along its axial;

the two shaft covers are respectively positioned at two ends of the wheel body and are sleeved on the support shaft and fixedly connected with the support shaft, and a floating oil seal is arranged between the shaft covers and the wheel body;

the middle of the support shaft is provided with a protruding step, the wheel body is provided with a groove capable of containing the step, and the step is clamped in the groove to limit the axial movement of the support shaft.

Furthermore, a copper sleeve is arranged between the fulcrum shaft and the wheel body, the copper sleeve is relatively fixed with the wheel body, and a gap is formed between the fulcrum shaft and the copper sleeve.

Further, including the iron cover, copper sheathing fixed mounting in the iron cover, iron cover fixed connection in the wheel body.

Further, the iron sleeves are provided with two iron sleeves, the two iron sleeves are respectively inserted from two ends of the shaft hole and are fixedly connected, and the distance between the two iron sleeves forms the groove.

Further, the unilateral clearance between the step and the groove is 0.3-0.5 mm.

Further, the shaft cover is connected with the fulcrum in an interference fit mode.

Further, the iron sleeve is connected with the wheel body in an interference fit mode and is fixedly connected with the wheel body through bolts.

Further, the hardness of the iron sleeve is less than that of the wheel body.

When the thrust wheel is assembled, firstly pressing the copper bush into the iron bush to complete the assembly of two iron bush components, then pressing an iron bush pressed with the copper bush into the wheel body, fixing firmly through the bolt, then inserting the fulcrum shaft from one end of the wheel body without the iron bush, then pressing another iron bush into the other end of the wheel body, fixing through the bolt, then installing floating oil seals at two ends, and finally pressing a shaft cover;

and after the assembly is finished, lubricating oil is injected into the wheel body, and the volume of the injected lubricating oil is 70 +/-2% of the volume of the oil storage cavity of the thrust wheel.

Further, after the copper sleeve is pressed into the iron sleeve, a hole is drilled in the flange edge of the copper sleeve, and a positioning pin is pressed into the drilled hole.

The invention has the beneficial effects that:

according to the thrust wheel, the protruding step is arranged in the middle of the supporting shaft, the wheel body is provided with the groove capable of containing the step, the step is clamped in the groove to limit axial movement of the supporting shaft, the limiting step is arranged in the middle of the supporting shaft, the mounting structure of the floating oil seal can be simplified, the diameter of the supporting shaft can be reduced, the influence of jumping and the like during processing of the supporting shaft can be effectively counteracted due to the small distance between the middle step and the step during processing, and the processing precision is higher.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is an exploded view of a prior art bogie wheel;

FIG. 2 is a cross-sectional view of a prior art thrust wheel;

FIG. 3 is an exploded view of the thrust wheel of the present invention;

FIG. 4 is a cross-sectional view of the thrust wheel of the present invention;

FIG. 5 is an exploded view of the iron and copper sleeves of the present invention;

the parts in the drawings are marked as follows:

the wheel body 1 and the shaft hole 11;

a support shaft 2 and a step 21;

the shaft cover 3, the through hole 31 and the floating oil seal 4;

copper bush 5, iron bush 6, oil storage tank 61, oil hole 62 and bolt 7.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.