CN215806061U - Hub reduction gear and axle - Google Patents
Hub reduction gear and axle Download PDFInfo
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- CN215806061U CN215806061U CN202121645089.9U CN202121645089U CN215806061U CN 215806061 U CN215806061 U CN 215806061U CN 202121645089 U CN202121645089 U CN 202121645089U CN 215806061 U CN215806061 U CN 215806061U
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Abstract
The utility model discloses a hub reduction gear and an axle, wherein the hub reduction gear comprises a half-shaft sleeve, a half shaft, a hub and a planetary gear reduction assembly; the half shaft penetrates through the half shaft sleeve, and the outer side end of the half shaft protrudes out of the half shaft sleeve; the planetary gear speed reduction assembly comprises a sun gear, a planetary support, a planetary gear and a gear ring, wherein the sun gear is synchronously connected with the outer end part of the half shaft, the planetary support is fixedly connected to the hub, the gear ring is synchronously connected to the half shaft sleeve, the planetary gear is pivoted on the planetary support, and the inner side of the planetary gear is meshed with the sun gear and the outer side of the planetary gear is meshed with the gear ring; the planet support includes lateral wall, inside wall, and planetary gear is located between inside wall and the lateral wall, and a gear shaft passes lateral wall, planetary gear, inside wall in proper order, and the cross-under has along the radial screw that extends of gear shaft on the inside wall, and the medial extremity joint of screw is in the draw-in groove of seting up on the gear shaft surface. The utility model simplifies the structure of the hub reduction gear and improves the assembly efficiency.
Description
Technical Field
The utility model relates to the technical field of vehicles, in particular to a wheel-side speed reducer and an axle.
Background
Some drive axles of large vehicles are generally provided with wheel-side reducers at the end parts of the drive axles, the wheel-side reducers are generally planetary gear reducers, power transmission between a half shaft and wheels is realized through the planetary gear reducers, the planetary gear reducers generally comprise planetary gear supports, planetary gears, sun gears, gear shafts and gear rings, the planetary gears are arranged on the planetary gear supports through the gear shafts, the planetary gear supports have no limit structures for the gear shafts, and the gear shafts can move along the axial direction of the axles in the driving process of the vehicles, so that the transmission efficiency is influenced; some hub reduction gears's gear shaft is spacing through the lock collar, and it is on planet wheel support with the gear shaft location that utilizes the lock collar, and its structure is comparatively complicated to in the planet gear reduction gear assembling process, lead to the gear shaft installation comparatively loaded down with trivial details, influence the packaging efficiency of axle.
SUMMERY OF THE UTILITY MODEL
In view of the defects of the prior art, the utility model aims to provide a wheel reduction gear, which can simplify the structure of the wheel reduction gear and improve the assembly efficiency.
The utility model also aims to provide an axle.
In order to achieve the first purpose, the utility model adopts the following technical scheme:
the hub reduction gear comprises a semi-shaft sleeve, a semi-shaft, a hub and a planetary gear reduction assembly;
the half shaft penetrates through the half shaft sleeve and can rotate relative to the half shaft sleeve, and the outer side end of the half shaft protrudes out of the half shaft sleeve;
the hub is rotatably sleeved outside the half-shaft sleeve;
the planetary gear speed reduction assembly comprises a sun gear, a planetary support, a planetary gear and a gear ring, wherein the sun gear is synchronously connected with the outer end part of the half shaft, the planetary support is fixedly connected to the hub, the gear ring is synchronously connected to the half shaft sleeve, the planetary gear is pivoted on the planetary support, and the inner side of the planetary gear is meshed with the sun gear while the outer side of the planetary gear is meshed with the gear ring;
the planet carrier includes lateral wall, inside wall, and planetary gear is located between inside wall and the lateral wall, and a gear shaft passes lateral wall, planetary gear, inside wall in proper order, and the cross-under has along the radial screw that extends of gear shaft on the inside wall, and the medial extremity joint of this screw is in the draw-in groove of offering on the gear shaft surface, planetary gear and gear shaft pivot cooperation.
A first gasket sleeved on the gear shaft is arranged between the inner end face and the inner side wall of the planetary gear, and a second gasket sleeved on the gear shaft is arranged between the outer end face and the outer side wall of the planetary gear.
3. The wheel hub reduction unit of claim 2, wherein the gear shaft is provided with a shoulder, and the first washer is clamped between the inner sidewall and the shoulder.
The second packing ring is provided with a positioning flange extending towards the outer side wall, the outer side wall is provided with a positioning groove for embedding the positioning flange, and the positioning flange and the positioning groove are matched to form a positioning assembly for preventing the second packing ring from rotating relative to the outer side wall.
A sealing ring is clamped between the outer circular surface and the outer side wall of the gear shaft.
And a half-shaft thrust pin is fixedly connected to the planet support, and is arranged opposite to the outer end face of the half shaft.
A gear ring support is arranged between the gear ring and the half-shaft sleeve, and two ends of the gear ring support are respectively connected with the gear ring and the half-shaft sleeve through splines.
The gear ring support is sleeved outside the half-shaft sleeve, the outer surface of the half-shaft sleeve is provided with a clamping portion, the half-shaft sleeve is further screwed with a locking nut, and the gear ring support is clamped between the clamping portion and the locking nut.
The planetary gear reduction assembly includes three planetary gears arranged in a circumferential array about a central axis of the sun gear.
In order to achieve the second purpose, the utility model adopts the following technical scheme:
the vehicle axle comprises the wheel-side speed reducer.
The utility model has the beneficial effects that:
according to the utility model, the planetary gear is arranged between the inner side wall and the outer side wall of the planetary support, the gear shaft penetrates through the outer side wall, the planetary gear and the inner side wall, the planetary gear is pivoted on the planetary support, the gear shaft is used for supporting the planetary gear, the planetary gear is not required to be arranged on the planetary support through a bearing, and meanwhile, the screw penetrates through the inner side wall and then is clamped into the gear shaft to limit the axial position of the gear shaft, so that the structure of the hub reduction gear is simplified, and the assembly efficiency of the hub reduction gear is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
fig. 3 is an enlarged view at a in fig. 2.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, 2 and 3, a hub reduction gear according to the present invention includes a half axle sleeve 50, a half axle 20, a hub 10, and a planetary gear reduction assembly, wherein the half axle 20 is inserted into the half axle sleeve 50, the half axle 20 can rotate relative to the half axle sleeve 50, an outer end of the half axle 20 is inserted through the half axle sleeve 50 and has a portion protruding from an outer end surface of the half axle sleeve 50, the hub 10 can be rotatably sleeved outside the half axle sleeve 50, and specifically, a bearing can be disposed between the hub 10 and the half axle sleeve 50 to enable the two to rotate relatively. The planetary gear assembly comprises a sun gear 60, a planet carrier 30, three planet gears 33 and a ring gear 40, the sun gear 60 is synchronously connected with the part of the half shaft 20, which is transmitted out of the half shaft sleeve 50 at the outgoing end part, so that the sun gear 60 can rotate synchronously with the half shaft 20, the planet carrier 30 is fixedly connected to the hub 10, the ring gear 40 is connected to the half shaft sleeve 50, which is synchronously coupled with the half-axle sleeve 50 so as to be relatively fixed with the half-axle sleeve 50, three planet gears 33 are pivoted on the planet carrier 30, the three planet gears 33 are arranged in a circumferential array around the central axis of the sun gear 60, the inner sides of the planet gears 33 are meshed with the sun gear 60, the outer sides of the planet gears 33 are meshed with the gear ring 40, the half shaft 20 drives the sun gear 60 to rotate, thereby rotating the planet gears 33 about the central axis of the sun gear 60, which in turn rotates the planet carrier 30, which ultimately rotates the hub 10. The planet carrier 30 includes an outer sidewall 301, and an inner sidewall 302, the inner sidewall 302 and the outer sidewall 301 are connected together by a plurality of connecting ribs, and three mounting positions are formed between the inner side wall 302 and the outer side wall 301, the three planetary gears 33 are all positioned between the inner side wall 302 and the outer side wall 301, and are correspondingly arranged in the three mounting positions one by one, the planet gears 33 are pivoted on the planet carrier 30 through a gear shaft 31, specifically, after the planetary gear 33 is placed in the mounting position, the gear shaft 31 passes through the holes on the outer side wall 301, the planetary gear 33 and the inner side wall 302 in sequence from the outer side of the outer side wall 301, the screw 32 passes through the inner side wall 302, the screw 32 extends along the radial direction of the gear shaft 31, a clamping groove 312 is arranged on the surface of the gear shaft 31, the screw 32 is tightened, the inner side end of the screw 32 is clamped into the clamping groove 312, the screw 32 is then used to define the freedom of movement of the pinion shaft 31 in its own axial direction relative to the planet carrier 30; the gear shaft 31 has an outer diameter slightly smaller than the diameter of the hole in the planetary gear 33, and a lubricating coating is applied to the surface of the gear shaft 31 to allow the planetary gear 33 to rotate relative to the gear shaft 31 after the gear shaft 31 passes through the planetary gear 33, and the planetary gear 33 is supported by the gear shaft 31 to thereby pivotally couple the planetary gear 33 to the planet carrier 30. The outer wall 301 of the planet carrier 30 has an outer diameter larger than the inner wall 302, and when the planet carrier 30 is fixedly connected to the hub 10, the outer wall 301 is abutted against the outer end surface of the hub 10, and the planet carrier 30 is fixedly connected to the hub 10 by passing a plurality of bolts through the edge portion of the outer wall 301, so that the other portion of the planet carrier 30 except the outer wall 301 is disposed inside the hub 10.
According to the structure, the planetary gear is arranged between the inner side wall and the outer side wall of the planetary support, the gear shaft penetrates through the outer side wall, the planetary gear and the inner side wall, the planetary gear is pivoted on the planetary support, the gear shaft is used for supporting the planetary gear, the planetary gear is not required to be installed on the planetary support through a bearing, and meanwhile, the screw penetrates through the inner side wall and then is clamped into the gear shaft to limit the axial position of the gear shaft, so that the structure of the wheel-side reducer is simplified, and meanwhile, the assembly efficiency of the wheel-side reducer is improved.
In a preferred embodiment, the present invention provides a first washer 35 and a second washer 34 at two ends of the planetary gear 33, both of which are sleeved on the gear shaft 31, wherein the first washer 35 is located between the inner end surface and the inner side wall 302 of the planetary gear 33, and the second washer 34 is located between the outer end surface and the outer side wall 301 of the planetary gear 33, and by providing the first washer 35 and the second washer 34, and at the same time, the first washer 35 and the second washer 34 can be made of wear-resistant materials, so that the wear on the planetary carrier 30 can be reduced; in order to avoid the rotation of the first washer 35 along with the planet gear 33, a shaft shoulder 311 may be provided on the gear shaft 31, when the gear shaft 31 passes through the planet gear 33 during assembly, a portion of the gear shaft 31 located inside the shaft shoulder 311 passes through the first washer 35 and extends into the hole of the inner side wall 302, and after the screw 32 is tightened, the first washer 35 is clamped and fixed by the shaft shoulder 311 and the inner side wall 302, so that the first washer 35 and the planet carrier 30 are kept fixed; a positioning flange 341 extending towards the outer side wall 301 is provided on the second washer 34, a positioning groove is provided on the outer side wall 301, and the positioning flange 341 snaps into the positioning groove and cooperates with the positioning groove to form a positioning assembly for preventing the second washer 34 from rotating relative to the outer side wall 301, and then keeping the second washer 34 fixed with the planet carrier 30.
In order to ensure the sealing performance of the fit clearance between the pinion shaft and the planetary gears 33 and prevent dust from entering, a seal ring is further sandwiched between the outer circumferential surface of the pinion shaft 31 and the outer side wall 301.
In addition, in order to further avoid the abrasion of the planet carrier 30, the utility model fixes an axle thrust pin 70 on the planet carrier 30, the axle thrust pin 70 is fixed on the center position of the outer side wall 301 and is arranged opposite to the outer side end surface 301 of the half shaft 20, and the push pin 70 of the half shaft is matched with the half shaft 20 to avoid the abrasion of the planet carrier 30 caused by the rotation of the half shaft 20.
In the utility model, a gear ring bracket 41 is also arranged between the gear ring 40 and the half-shaft sleeve 50, the half-shaft sleeve 50 is synchronously connected with the gear ring 40 through the gear ring bracket 41, and specifically, two ends of the gear ring bracket 41 are respectively connected with the gear ring 40 and the half-shaft sleeve 50 through splines. The gear ring support 41 is sleeved outside the half-shaft convex-concave pipe 50, the degree of freedom of circumferential rotation of the gear ring support and the half-shaft convex-concave pipe is limited through a spline arranged between the gear ring support and the half-shaft convex-concave pipe 50, meanwhile, a clamping portion 52 is arranged on the outer surface of the half-shaft sleeve 50, a locking nut 51 is screwed at the outer side end of the half-shaft sleeve 50, during assembly, the gear ring support 41 is sleeved on the half-shaft sleeve 50 through the outer side end of the half-shaft sleeve 50, then the locking nut 51 is screwed on the half-shaft sleeve 50, and the locking nut 51 is screwed so that the gear ring support 41 is clamped between the clamping portion 52 and the locking nut 51, and therefore the degree of freedom of relative movement of the gear ring support 41 and the half-shaft sleeve 50 in the axial direction is limited.
It should be noted that the concept of the present invention is described above only in the case of including three planetary gears 33, and actually, the number of the planetary gears 33 may be set as needed.
The axle of the utility model comprises the wheel-side reducer, and the structures of the axle except the wheel-side reducer are the same as those of the existing axle, and are not described in detail here.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.
Claims (10)
1. The hub reduction gear is characterized by comprising a semi-shaft sleeve, a semi-shaft, a hub and a planetary gear reduction assembly;
the half shaft penetrates through the half shaft sleeve and can rotate relative to the half shaft sleeve, and the outer side end of the half shaft protrudes out of the half shaft sleeve;
the hub is rotatably sleeved outside the half-shaft sleeve;
the planetary gear speed reduction assembly comprises a sun gear, a planetary support, a planetary gear and a gear ring, wherein the sun gear is synchronously connected with the outer end part of the half shaft, the planetary support is fixedly connected to the hub, the gear ring is synchronously connected to the half shaft sleeve, the planetary gear is pivoted on the planetary support, and the inner side of the planetary gear is meshed with the sun gear while the outer side of the planetary gear is meshed with the gear ring;
the planet carrier includes lateral wall, inside wall, and planetary gear is located between inside wall and the lateral wall, and a gear shaft passes lateral wall, planetary gear, inside wall in proper order, and the cross-under has along the radial screw that extends of gear shaft on the inside wall, and the medial extremity joint of this screw is in the draw-in groove of offering on the gear shaft surface, planetary gear and gear shaft pivot cooperation.
2. The wheel-side reducer according to claim 1, wherein a first washer fitted over the pinion shaft is provided between the inner end surface and the inner side wall of the planetary gear, and a second washer fitted over the pinion shaft is provided between the outer end surface and the outer side wall of the planetary gear.
3. The wheel hub reduction unit of claim 2, wherein the gear shaft is provided with a shoulder, and the first washer is clamped between the inner sidewall and the shoulder.
4. The wheel reduction of claim 2, wherein the second washer is provided with a retaining flange extending toward the outer side wall, the outer side wall being provided with a retaining groove for receiving the retaining flange, the retaining flange and the retaining groove cooperating to form a retaining assembly for preventing rotation of the second washer relative to the outer side wall.
5. The hub reduction unit of claim 1, wherein a seal is sandwiched between the outer circumferential surface and the outer side wall of the gear shaft.
6. The wheel reduction unit of claim 1, wherein a semi-axle thrust pin is fixedly attached to the planet carrier, the semi-axle thrust pin being disposed opposite the outboard end face of the semi-axle.
7. The hub reduction unit of claim 1, wherein a ring gear carrier is provided between the ring gear and the axle shaft sleeve, and both ends of the ring gear carrier are connected to the ring gear and the axle shaft sleeve by splines, respectively.
8. The hub reduction gear according to claim 7, wherein the gear ring bracket is fitted around the outer portion of the axle shaft sleeve, a retaining portion is provided on the outer surface of the axle shaft sleeve, a lock nut is screwed to the axle shaft sleeve, and the gear ring bracket is held between the retaining portion and the lock nut.
9. The hub reduction unit of claim 1, wherein the planetary reduction assembly includes three planetary gears arranged in a circumferential array about the central axis of the sun gear.
10. An axle, characterized in that it comprises a hub reduction gear according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121645089.9U CN215806061U (en) | 2021-07-20 | 2021-07-20 | Hub reduction gear and axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121645089.9U CN215806061U (en) | 2021-07-20 | 2021-07-20 | Hub reduction gear and axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215806061U true CN215806061U (en) | 2022-02-11 |
Family
ID=80183006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121645089.9U Active CN215806061U (en) | 2021-07-20 | 2021-07-20 | Hub reduction gear and axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215806061U (en) |
-
2021
- 2021-07-20 CN CN202121645089.9U patent/CN215806061U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |