CN214331443U

CN214331443U - Hub reduction gear mounting structure and hub reduction gear assembly

Info

Publication number: CN214331443U
Application number: CN202120060427.6U
Authority: CN
Inventors: 冯涛; 许可; 王震
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-10-01
Anticipated expiration: 2031-01-11

Abstract

The utility model relates to an axle technical field discloses a wheel reduction gear mounting structure and wheel reduction gear assembly. The wheel reduction gear mounting structure includes ring gear support and locking double-screw bolt, and the ring gear support includes support body and axial extension, and the support body is used for being connected with planetary reducer, and the axial extension cover is established and is connected in the axle housing, and the axial extension sets up in one side of support body towards planetary reducer, and the locking double-screw bolt includes butt portion and the connecting portion along axle housing axial extension, and the semi-axis is located to the connecting portion cover and is penetrated and connect in the tip of axle housing, and butt portion and axial extension are close to planetary reducer's terminal surface butt. The utility model discloses a wheel reduction gear mounting structure is favorable to reducing the axial occupation space of wheel reduction gear assembly along axial compact structure. The utility model discloses hub reduction gear assembly, through setting up foretell hub reduction gear mounting structure, can reduce axial occupation space, and can correspondingly reduce whole weight.

Description

Hub reduction gear mounting structure and hub reduction gear assembly

Technical Field

The utility model relates to an axle technical field especially relates to a wheel reduction gear mounting structure and wheel reduction gear assembly.

Background

The hub reduction gear is the last reduction gear in an automobile transmission system, is used for reducing the speed and increasing the torque transmitted by a main reduction gear and then transmitting the speed and increasing the torque to a hub so as to enable wheels to generate large driving force under the reaction of ground adhesion, and is widely applied to trucks, large buses, off-road vehicles and other large industrial and mining vehicles.

As shown in fig. 1, the hub reduction gear assembly includes a half shaft 1 ', an axle housing 2 ' sleeved on the half shaft 1 ', a hub connected with the axle housing 2 ', and a planetary reduction gear 3 ', and the planetary reduction gear 3 ' is connected between the half shaft 1 ' and the axle housing 2 ' to reduce the speed and increase the torque of the power of the half shaft 1 ' and then transmit the power to the hub. Specifically, the planetary reducer 3 ' is provided at one end of the axle shaft 1 ' and includes a sun gear 31 ' and a plurality of planetary gears 32 ', the sun gear 31 ' being connected with the axle shaft 1 ', and the plurality of planetary gears 32 ' being annularly provided to the sun gear 31 ' and being engaged with the sun gear 31 ', respectively. In the prior art, in order to realize connection between the planetary reducer 3 'and the axle housing 2', as shown in fig. 1, the wheel-side reducer assembly further includes a ring gear 4 'and a ring gear support 5', the ring gear 4 'is sleeved outside the plurality of planetary gears 32' and is engaged with the planetary gears 32 ', the ring gear support 5' includes a support body 51 'and an axial extension portion 52', the support body 51 'is connected with the ring gear 4', the axial extension portion 52 'is connected to a side of the support body 51' away from the planetary gears 32 'and is connected with the axle housing 2', a nut is disposed at an end of the axle housing 2 ', an end surface of the ring gear support 5' close to the planetary reducer 3 'is abutted to an end surface of the nut, and an end surface of the ring gear support 5' away from the planetary reducer 3 'is abutted to an end surface of a bearing on the axle housing 2', so as to realize connection between the planetary reducer 3 'and the axle housing 2'. However, this connection method, the axial extension 52' and the nut, may occupy a relatively long axial space, resulting in a wheel reduction assembly having a less compact structure and a large overall size.

Therefore, it is desirable to provide a wheel reduction gear mounting structure and a wheel reduction gear assembly to solve the above problems.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a wheel reduction gear mounting structure, its axial compact structure is favorable to reducing the axial occupation space of wheel reduction gear assembly.

A second object of the present invention is to provide a wheel reduction assembly, which can reduce the axial occupation space by providing the above wheel reduction mounting structure.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a hub reduction gear mounting structure for connect planetary reducer and axle housing, the semi-axis is rotationally located to the cover of axle housing, includes:

the gear ring support comprises a support body and an axial extension portion, the support body is used for being connected with the planetary speed reducer, the axial extension portion is sleeved on and connected with the axle housing, and the axial extension portion is arranged on one side, facing the planetary speed reducer, of the support body; and

locking double-screw bolt, include butt portion and edge axle housing axial extension's connecting portion, the connecting portion cover is located the semi-axis just penetrate and connect in the tip of axle housing, butt portion with axial extension is close to planetary reducer's terminal surface butt.

Optionally, a groove is formed in an end surface of the axial extension portion, which is close to the planetary reducer, a thinning portion is arranged on the abutting portion, and at least part of the thinning portion is clamped in the groove.

Optionally, hub reduction gear mounting structure still includes the gasket, the gasket sets up the terminal surface of axle housing with between the butt portion, the gasket is close to planetary reducer's terminal surface with axial extension is close to planetary reducer's terminal surface parallel and level.

Optionally, the circumferential surface of the connecting portion is provided with external threads, the end surface of the axle housing is provided with a threaded hole, and the connecting portion is in threaded connection with the threaded hole.

Optionally, a bearing is arranged on the half shaft, and an end face of one side of the bracket body, which is far away from the planetary reducer, is abutted against an end face of the bearing.

Optionally, be provided with first splined hole on the axial extension portion, the axle housing tip is provided with first spline, first splined hole with first spline cooperation.

The utility model provides a hub reduction gear assembly, includes hub reduction gear mounting structure, still include semi-axis, axle housing and planetary reduction gear, the axle housing is rotationally located the semi-axis, planetary reduction gear's input with the semi-axis is connected, the output with this body coupling of support.

Optionally, planetary reducer includes sun gear, a plurality of planetary gear and planet carrier, sun gear with the semi-axis is connected, the planet carrier cover is located the semi-axis, each planetary gear rotationally supports on the planet carrier and respectively with the sun gear meshing, wheel reduction assembly still includes the ring gear, the ring gear cover is located a plurality of planetary gear, and respectively with each planetary gear meshes mutually, the ring gear with this body coupling of support.

Optionally, an avoiding groove is formed in the end face, close to the locking stud, of the planet carrier, and the abutting portion is at least partially accommodated in the avoiding groove.

Optionally, a second spline hole is formed in the gear ring, a second spline is arranged on the outer ring of the support body, and the second spline is matched with the second spline hole.

The utility model discloses beneficial effect does:

the locking double-screw bolt of wheel reduction gear mounting structure is used for the axial motion of spacing ring gear support, the utility model discloses a to be used for realizing that the axial extension setting that ring gear support and axle housing are connected is close to planetary reducer's one side at the support body, and with the locking double-screw bolt be used for penetrate the axle housing with the connecting portion that the axle housing is connected in, when realizing being connected with the axle housing respectively, axial extension and connecting portion overlap mutually in the axial direction of axle housing to make wheel reduction gear mounting structure at axial compact structure, reduced axial occupation space.

The utility model discloses a wheel reduction assembly, it can reduce axial occupation space through setting up foretell wheel reduction mounting structure to can correspondingly shorten the length of semi-axis, axle housing, in order to play the weight reduction effect of wheel reduction assembly.

Drawings

FIG. 1 is a schematic illustration of a prior art wheel hub reduction assembly;

FIG. 2 is a cross-sectional view of a wheel hub reduction assembly in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a cross-sectional view of a ring gear support provided in accordance with an embodiment of the present invention;

FIG. 6 is a side view of a ring gear carrier according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a locking stud according to an embodiment of the present invention;

fig. 8 is a side view of a locking stud according to an embodiment of the present invention.

In the figure:

1' -a half shaft; a 2' -axle housing; 3' -planetary reduction gear; 31' -sun gear; 32' -planetary gears; 4' -a gear ring; 5' -a ring gear support; 51' -a stent body; 52' -an axial extension;

1. a planetary reducer; 11. a sun gear; 12. a planetary gear; 13. a planet carrier; 131. an avoidance groove;

2. an axle housing; 21. a threaded hole; 22. a first spline;

3. a half shaft;

4. a ring gear support; 41. a stent body; 411. a second spline; 42. an axial extension; 421. a groove; 422. a first splined bore;

5. locking the stud; 51. an abutting portion; 511. a thinning portion; 52. a connecting portion; 521. an external thread;

6. a gasket;

7. a bearing;

8. a ring gear; 81. a second keyhole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a hub reduction gear mounting structure and hub reduction gear assembly, and it can be used to axle technical field. As shown in fig. 2, the hub reduction gear assembly includes hub reduction gear mounting structure, semi-axis 3, axle housing 2 and planetary reduction gear 1, and semi-axis 3 is located to axle housing 2 rotationally the cover, and planetary reduction gear 1's input is connected with semi-axis 3, and the output is connected with hub reduction gear mounting structure, and hub reduction gear mounting structure can realize that the transmission between planetary reduction gear 1 and the axle housing 2 is connected. Specifically, the planetary reducer 1 includes a sun gear 11, a plurality of planet gears 12 and a planet carrier 13, the sun gear 11 is connected with the axle shaft 3, the planet carrier 13 is sleeved on the axle shaft 3, each planet gear 12 is rotatably supported on the planet carrier 13 and is arranged along the circumferential direction of the sun gear 11, the planet gears 12 are meshed with the sun gear 11, the wheel hub reducer assembly further includes a gear ring 8, the gear ring 8 is sleeved on the plurality of planet gears 12 and is respectively meshed with each planet gear 12, and the wheel hub reducer mounting structure is respectively connected with the gear ring 8, so as to realize connection with the planetary reducer 1. In the embodiment, the sun gear 11 and the half shaft 3 can be matched through splines, so that the connection is convenient and the transmission is reliable.

Preferably, as shown in fig. 3, the wheel reduction gear mounting structure includes a ring gear support 4 and a locking stud 5, wherein the ring gear support 4 includes a support body 41 and an axial extension portion 42, the support body 41 is connected with the ring gear 8, the axial extension portion 42 is sleeved and connected to the axle housing 2, the axial extension portion 42 is disposed on one side of the support body 41 facing the planetary reduction gear 1, the locking stud 5 includes an abutting portion 51 and a connecting portion 52 extending axially along the axle housing 2, the connecting portion 52 is sleeved on the axle housing 3 and penetrates and is connected to an end portion of the axle housing 2, and the abutting portion 51 abuts against an end surface of the axial extension portion 42 close to the planetary reduction gear 1.

The locking stud 5 of wheel reduction gear mounting structure is used for the axial motion along the spacing ring gear support 4 of axial, this implementation sets up in one side that is close to planetary reducer 1 at support body 41 through the axial extension 42 that will be used for realizing that ring gear support 4 is connected with axle housing 2, and with locking stud 5 be used for penetrating axle housing 2 with the connecting portion 52 that axle housing 2 is connected, when the realization is connected with axle housing 2 respectively, axial extension 42 and connecting portion 52 overlap mutually in the axial direction of axle housing 2, thereby make wheel reduction gear mounting structure compact structure in the axial, the axial occupation space has been reduced. The wheel reduction assembly of this embodiment can reduce axial occupation space through setting up foretell wheel reduction mounting structure to can correspondingly shorten the length of semi-axis 3, axle housing 2, play the weight reduction effect to wheel reduction assembly. Specifically, in the present embodiment, the ring gear carrier 4 is an annular solid of revolution, and the carrier body 41 and the axially extending portion 42 are coaxially provided. Similarly, the locking stud 5 is also of an annular revolution body structure, and the abutting part 51 and the connecting part 52 are coaxially arranged, so that the stability of the hub reduction gear assembly in the operation process is ensured.

Preferably, as shown in fig. 2 and 3, the axle shaft 3 is provided with a bearing 7, and an end surface of the carrier body 41 on the side away from the planetary gear 1 abuts against an end surface of the bearing 7. On the one hand, the end face of the bearing 7 and the end face of the abutting part 51 abut against the two end faces of the gear ring support 4 respectively, so that axial limitation on the gear ring support 4 can be realized, and on the other hand, the bearing 7 can be used for supporting other structures in the wheel reduction assembly.

Preferably, as shown in fig. 3 and 4, an avoiding groove 131 is provided on an end surface of the carrier 13 close to the lock stud 5, and the abutting portion 51 is at least partially accommodated in the avoiding groove 131. Thereby enabling further shortening of the axial dimension of the hub reduction gear assembly. Specifically, in the present embodiment, the depth of the escape groove 131 is equal to the thickness of the contact portion 51, so that the contact portion 51 is completely accommodated in the escape groove 131, and the overall structure is made compact to the maximum extent. In other embodiments, in consideration of the strength of the carrier 13, the depth of the avoiding groove 131 may be slightly smaller than the thickness of the abutting portion 51, and the avoiding groove may be selectively provided according to actual needs, which is not specifically limited herein.

Preferably, as shown in fig. 4, 6 and 8, a groove 421 is provided on an end surface of the axially extending portion 42 close to the planetary reducer 1, a thinning portion 511 is provided on the abutting portion 51, and at least a part of the thinning portion 511 is engaged with the groove 421. The thickness reducing portion 511 is clamped in the groove 421 to further ensure the limiting effect of the locking stud 5 on the gear ring support 4, and the gear ring support 4 is prevented from being shifted in position in the running process of the wheel reduction assembly. Specifically, in the present embodiment, as shown in fig. 8, the thinning portions 511 are arranged at intervals in the circumferential direction of the abutting portions 51, the width of each abutting portion 51 in the circumferential direction is greater than the width of the groove 421, before the locking stud 5 is mounted, the entire thinning portion 511 and the abutting portions 51 are integrally formed, and in the assembling process, after the locking stud 5 is completely screwed onto the axle housing 2, since the width of the thinning portion 511 is greater than the width of the groove 421, at least a part of the thinning portion 511 faces the groove 421, at this time, as shown in fig. 4, the position corresponding to the groove 421 is punched out by the thinning portion 511, and the punched out part is bent and pressed into the groove 421, so as to enhance the limiting effect of the locking stud 5 on the ring gear 8.

Preferably, as shown in fig. 4, the wheel reduction gear mounting structure further includes a spacer 6, the spacer 6 being disposed between an end surface of the axle housing 2 and the abutment portion 51, the end surface of the spacer 6 adjacent to the planetary reduction gear 1 being flush with an end surface of the axially extending portion 42 adjacent to the planetary reduction gear 1. On the one hand, the locking stud 5 can be ensured to be completely screwed down with the axle housing 2, on the other hand, the stress balance of the whole end face of the abutting part 51 is ensured, and the practical service life of the gear ring support 4 is prevented from being influenced by stress concentration.

Preferably, as shown in fig. 3 and 6, the gear ring 8 is provided with a second spline hole 81, the outer ring of the bracket body 41 is provided with a second spline 411, the second spline 411 is matched with the second spline hole 81, and the gear ring 8 can be conveniently connected by matching the second spline 411 with the second spline hole 81, so that the gear ring bracket 4 can synchronously rotate along with the gear ring 8.

Further, as shown in fig. 4 and 6, be provided with first splined hole 422 on the axial extension portion 42 of ring gear support 4, axle housing 2 tip is provided with first spline 22, first splined hole 422 and the cooperation of first spline 22 to realize being connected between ring gear support 4 and the axle housing 2, connect conveniently and guarantee that axle housing 2 can be along with ring gear support 4 simultaneous movement.

Preferably, as shown in fig. 3 and 7, the circumferential surface of the connecting portion 52 is provided with external threads 521, the end surface of the axle housing 2 is provided with a threaded hole 21, and the connecting portion 52 is in threaded connection with the threaded hole 21, so that the locking stud 5 and the axle housing 2 are fixedly connected, the installation is convenient, the space on the outer circumferential surface of the axle housing 2 is not occupied, and the axial structure of the wheel hub reduction gear installation structure is compact.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and for those skilled in the art, there are variations on the specific embodiments and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a hub reduction gear mounting structure for connect planetary reducer (1) and axle housing (2), semi-axis (3) are rotationally located to axle housing (2) cover, its characterized in that includes:

the gear ring support (4) comprises a support body (41) and an axial extension portion (42), the support body (41) is used for being connected with the planetary reducer (1), the axial extension portion (42) is sleeved on and connected with the axle housing (2), and the axial extension portion (42) is arranged on one side, facing the planetary reducer (1), of the support body (41); and

locking double-screw bolt (5), include butt portion (51) and edge axle housing (2) axial extension's connecting portion (52), connecting portion (52) cover is located semi-axis (3) and penetrate and be connected in the tip of axle housing (2), butt portion (51) with axial extension (42) are close to the terminal surface butt of planetary reducer (1).

2. A hub reduction gear mounting structure according to claim 1, wherein a recess (421) is provided in an end surface of the axially extending portion (42) adjacent to the planetary reduction gear (1), and a thinned portion (511) is provided in the abutting portion (51), at least a part of the thinned portion (511) being engaged with the recess (421).

3. A wheel reduction gear mounting structure according to claim 1, characterized in that the wheel reduction gear mounting structure further includes a spacer (6), the spacer (6) being disposed between an end face of the axle housing (2) and the abutting portion (51), an end face of the spacer (6) near the planetary reduction gear (1) being flush with an end face of the axially extending portion (42) near the planetary reduction gear (1).

4. A wheel hub reduction gear mounting structure according to claim 1, characterized in that an external thread (521) is provided on the peripheral surface of the connecting portion (52), a threaded hole (21) is provided on the end surface of the axle housing (2), and the connecting portion (52) is screwed into the threaded hole (21).

5. A wheel reduction gear mounting structure according to claim 1, characterized in that a bearing (7) is provided on the half shaft (3), and an end surface of the carrier body (41) on a side away from the planetary reduction gear (1) abuts against an end surface of the bearing (7).

6. A hub reduction gear mounting arrangement according to claim 1, characterized in that the axially extending portion (42) is provided with a first splined bore (422), the axle housing (2) end portion is provided with a first spline (22), and the first splined bore (422) is engaged with the first spline (22).

7. A hub reduction gear assembly, comprising the hub reduction gear mounting structure according to any one of claims 1 to 6, and further comprising a half shaft (3), an axle housing (2) and a planetary reduction gear (1), wherein the axle housing (2) is rotatably sleeved on the half shaft (3), the input end of the planetary reduction gear (1) is connected with the half shaft (3), and the output end of the planetary reduction gear is connected with the bracket body (41).

8. The wheel reduction assembly according to claim 7, characterized in that the planetary reduction gear (1) comprises a sun gear (11), a plurality of planet gears (12) and a planet carrier (13), the sun gear (11) being connected with the axle shaft (3), the planet carrier (13) being sleeved on the axle shaft (3), each planet gear (12) being rotatably supported on the planet carrier (13) and being respectively engaged with the sun gear (11), the wheel reduction assembly further comprises a ring gear (8), the ring gear (8) being sleeved on the plurality of planet gears (12) and being respectively engaged with each planet gear (12), the ring gear (8) being connected with the carrier body (41).

9. A wheel hub reduction assembly according to claim 8, characterized in that an evasion groove (131) is provided in the end face of the planet carrier (13) close to the locking stud (5), the abutment (51) being at least partially accommodated in the evasion groove (131).

10. A hub reduction gear assembly according to claim 8, characterized in that the ring gear (8) is provided with a second splined hole (81), the outer ring of the carrier body (41) is provided with a second spline (411), and the second spline (411) is engaged with the second splined hole (81).