CN212529845U - Thrust wheel for bulldozer - Google Patents
Thrust wheel for bulldozer Download PDFInfo
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- CN212529845U CN212529845U CN202021170156.1U CN202021170156U CN212529845U CN 212529845 U CN212529845 U CN 212529845U CN 202021170156 U CN202021170156 U CN 202021170156U CN 212529845 U CN212529845 U CN 212529845U
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- support shaft
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Abstract
The utility model discloses a thrust wheel for bulldozer, which 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 along the axial direction of the wheel body, the fulcrum shaft penetrates through 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.
Description
Technical Field
The utility model belongs to the technical field of engineering machine tool, especially, relate to a thrust wheel for bull-dozer.
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.
In the prior art, the structure of the fulcrum of a large-displacement bulldozer (such as carter D8, D9 and D11 series) is shown in fig. 1 and 2: the two ends of the support shaft 2 are provided with limiting flanges 91, the corresponding steps 22 are arranged at the two ends of the support shaft, and the shaft diameter of the support shaft needs to be thick in order to give way to the floating oil seal, and the structure of a floating seal seat for installing the floating seal is relatively complex.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a bull wheel for bull-dozer, the centre of its counter roll is equipped with outstanding step, but the wheel body is equipped with the holding the recess of step, the step block in with the restriction in the recess the axial float of counter roll through set up the centre of counter roll with spacing step, can simplify the mounting structure of floating oil blanket to can reduce the diameter of counter roll, the step at middle part moreover can be higher when the precision of adding man-hour.
For solving the technical problem, the utility model discloses a technical scheme of adoption 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 support shaft and the wheel body, the copper sleeve and the wheel body are relatively fixed, and a gap is formed between the support 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.
Furthermore, the iron sleeves are provided with two iron sleeves, the two iron sleeves are respectively inserted from two ends of the shaft hole and fixedly connected with the wheel body, and the empty space between the two iron sleeves forms the groove.
Further, the unilateral clearance between the step and the groove is 0.3-0.5mm, and preferably 0.35 mm.
Further, the shaft cover is connected with the fulcrum in an interference fit mode.
Further, the iron sleeve is fixedly connected to the wheel body through a bolt.
Further, the iron sleeve is connected with the wheel body in an interference fit mode.
Further, the hardness of the iron sleeve is less than that of the wheel body.
The utility model has the advantages that:
the utility model discloses a thrust wheel, the centre of counter roll is equipped with outstanding step, but the wheel body is equipped with the holding the recess of step, the step block in with the restriction in the recess the axial float of counter roll through setting up spacing step to the centre of counter roll, can simplify the mounting structure of floating oil blanket to can reduce the diameter of counter roll, the step at middle part is adding man-hour moreover because the interval is less, can effectually offset influences such as beating in counter roll processing man-hour, and the machining precision is higher.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and 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 a schematic view of the exploded structure 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;
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Example (b): a thrust wheel for a bulldozer, as shown in fig. 3 to 5: the device comprises a wheel body 1, a fulcrum shaft 2 and a shaft cover 3, wherein the wheel body and the fulcrum 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 fulcrum shaft penetrates through the shaft hole, and the wheel body can rotate along the axis of the wheel body;
the two shaft covers are provided with through holes 31, 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;
in this embodiment, the shaft cover and the support shaft are connected in an interference fit manner, and the installation manner is convenient by adopting the interference fit manner, but the installation manner is not limited to this, and a bolt or pin fixing manner can also be adopted.
The middle of the fulcrum shaft is provided with a protruding step 21, the wheel body is provided with a groove capable of accommodating the step, and the step is clamped in the groove to limit the axial movement of the fulcrum shaft;
the utility model is suitable for a thrust wheel that bull-dozer was used can bear the great impact of bull-dozer and the axial atress when turning to, is particularly useful for carter's D8, D9, D11 and the loose D375 of little, the thrust wheel of D475 series.
In this embodiment, the unilateral clearance between the step and the groove is 0.3-0.5mm, and since the fulcrum shaft and the wheel body rotate relatively, and the axial force of the thrust wheel is particularly large when the device is running, particularly when the device is turning, the axial necessary clearance between the wheel body and the fulcrum shaft is also equivalent to the axial play of the bearing installation, so that a small amount of axial play can be accommodated between the wheel body and the fulcrum shaft, and in addition, the existence of the clearance can also enable more lubricating oil to be attached to the surfaces of the wheel body and the fulcrum shaft, thereby prolonging the service life of the wheel body.
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.
In this embodiment, the copper sleeve is made of a bimetal material, one side of the copper sleeve, which is in contact with the wheel body, is made of a steel material, and one side of the copper sleeve, which is in contact with the fulcrum shaft, is made of copper, because the fulcrum shaft and the copper sleeve are in a friction structure with relative movement, and because the fulcrum shaft must be made of a steel material with higher hardness and strength, the copper material can effectively prolong the service life of the fulcrum wheel when the fulcrum shaft and the copper sleeve are in friction, and the friction between the hard material and the soft material ensures that the wear is certainly generated on the soft material, and the chips generated by the wear of the copper material cannot generate secondary wear on the fulcrum shaft, so that the service life of the fulcrum wheel is further prolonged.
The copper sleeve is fixedly arranged on the iron sleeve, the iron sleeve is fixedly connected to the wheel body, two iron sleeves are arranged, the two iron sleeves are respectively inserted from two ends of the shaft hole and are fixedly connected with the wheel body, and a gap between the two iron sleeves forms the groove;
the iron sleeve can reduce the processing difficulty of products, and the combination and installation can be more convenient than the machining of digging out the groove. In addition, in this embodiment, the iron sleeve is made of HT250, and since the iron sleeve itself is used for mounting (connecting) the copper sleeve, and no friction is formed between the iron sleeve and the support shaft when the iron sleeve is used, the iron sleeve made of HT250 may be obtained by integral casting, which reduces the processing difficulty, and the material is cheap relative to 40Mn2 of the wheel body, so that the later repair of the support wheel (replacement of the copper sleeve, the iron sleeve, or other parts after wear) may be purposefully replaced, which reduces the cost of users.
The lateral wall of iron set is equipped with oil storage tank 61, the iron set with the copper sheathing all is equipped with the oilhole 62 that runs through the lateral wall in the position that corresponds, lubricating oil can store in the oil storage tank, and through the iron set with on the copper sheathing the oilhole flows extremely the surface of counter shaft the counter shaft with the frictional surface of copper sheathing produces the oil film, the life of improvement thrust wheel that can be great under the lubrication action.
And the oil storage groove on the iron sleeve enables the surface of the supporting shaft of the supporting wheel to form a continuous circulating oil film (circularly flowing from the oil storage groove to the oil hole to the shaft surface) when the supporting wheel works, so that the working temperature of the supporting wheel during rotation can be reduced, and the service life of the supporting wheel is prolonged.
In this embodiment, the iron sleeve is fixedly connected to the wheel body through a bolt 7, and the iron sleeve is connected to the wheel body in an interference fit manner.
In addition, the hardness of iron cover is less than the hardness of wheel body, in this embodiment, the wheel body is steel material, the iron cover forms for nodular iron or grey iron casting, can reduce manufacturing cost firstly, can cast out the oil groove that is used for the lubricating oil to flow in the iron cover secondly, and the oil groove can make the thrust wheel can hold more lubricating oil, the life of the improvement thrust wheel that the existence of lubricating oil can be very big.
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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
The utility model discloses a working process and theory of operation as follows:
the utility model discloses a thrust wheel, the centre of counter roll is equipped with outstanding step, but the wheel body is equipped with the holding the recess of step, the step block in with the restriction in the recess the axial float of counter roll through setting up spacing step to the centre of counter roll, can simplify the mounting structure of floating oil blanket to can reduce the diameter of counter roll, the step at middle part is adding man-hour moreover because the interval is less, can effectually offset influences such as beating in counter roll processing man-hour, and the machining precision is higher.
The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the same principle as the present invention.
Claims (9)
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 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 sleeves are provided with two iron sleeves, the two iron sleeves are respectively inserted from two ends of the shaft hole and fixedly connected with the wheel body, and the gap between the two iron sleeves forms the groove.
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 is fixedly connected to the wheel body through a bolt (7).
8. The thrust wheel for a bulldozer according to claim 3, characterized in that: the iron sleeve is connected with the wheel body in an interference fit mode.
9. 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170156.1U CN212529845U (en) | 2020-06-22 | 2020-06-22 | Thrust wheel for bulldozer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021170156.1U CN212529845U (en) | 2020-06-22 | 2020-06-22 | Thrust wheel for bulldozer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212529845U true CN212529845U (en) | 2021-02-12 |
Family
ID=74545212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021170156.1U Active CN212529845U (en) | 2020-06-22 | 2020-06-22 | Thrust wheel for bulldozer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212529845U (en) |
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2020
- 2020-06-22 CN CN202021170156.1U patent/CN212529845U/en active Active
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