CN214946184U

CN214946184U - Shaft connecting structure for differential mechanism

Info

Publication number: CN214946184U
Application number: CN202121715298.6U
Authority: CN
Inventors: 冯涛; 苗士军; 许可
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2021-11-30
Anticipated expiration: 2031-07-27

Abstract

The utility model discloses an interaxial connection structure for differential mechanism, it belongs to differential mechanism technical field, include: the planet carrier comprises an outer ring and an inner ring which are coaxially arranged, an inner hole of the inner ring is a spline hole, the planet carrier also comprises four gear shaft mounting hole groups, each gear shaft mounting hole group comprises a mounting through hole and a mounting blind hole which are coaxially arranged, the mounting through hole penetrates through the outer ring along the axial direction of the outer ring, the mounting blind hole is arranged on the inner ring along the axial direction of the inner ring, and a planetary gear mounting position is formed between the mounting through hole and the mounting blind hole of each gear shaft mounting hole group; the planetary gear assembly comprises four planetary gears and four gear shafts, wherein two ends of each gear shaft are respectively and rotatably arranged in the same gear shaft mounting hole group, the mounting through holes and the mounting blind holes are formed in the planetary gear mounting positions, and the two opposite end faces of the planetary gears and the planetary gear mounting positions are matched in a plane mode. The utility model discloses make differential mechanism job stabilization reliable.

Description

Shaft connecting structure for differential mechanism

Technical Field

The utility model relates to a differential mechanism technical field especially relates to an interaxial connection structure for differential mechanism.

Background

In a drive axle, a cross shaft of an inter-axle differential is matched with four planetary gears by adopting shaft holes, and an inter-axle differential shell is matched with the planetary gears by adopting a spherical surface. By adopting the structure, the requirement of spherical surface matching on the processing precision is higher, the cross shaft and the differential case are not connected and fixed, the cross shaft is in a cantilever state when being subjected to the radial force of the planetary gear, the rigidity is lower, abnormal wear failure of the cross shaft often occurs, and even the cross shaft is broken.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an interaxial connection structure for differential mechanism, it can replace the cross axle among the prior art, guarantees that differential mechanism can stable work all the time.

As the conception, the utility model adopts the technical proposal that:

an inter-shaft connection structure for a differential, comprising:

the planet carrier comprises an outer ring and an inner ring which are coaxially arranged, an inner hole of the inner ring is a spline hole, a reinforced connecting rib is connected between the outer ring and the inner ring, the reinforced connecting rib is configured to be fixedly connected with a differential case, the planet carrier further comprises four gear shaft mounting hole groups, the four gear shaft mounting hole groups are arranged at equal intervals along the circumferential direction of the planet carrier, each gear shaft mounting hole group comprises a mounting through hole and a mounting blind hole which are coaxially arranged, the mounting through hole penetrates through the outer ring along the axial direction of the outer ring, the mounting blind hole is arranged on the inner ring along the axial direction of the inner ring, and a planet gear mounting position is formed between the mounting through hole and the mounting blind hole of each gear shaft mounting hole group;

the planetary gear assembly comprises four planetary gears and four gear shafts, each planetary gear is arranged on each gear shaft, two ends of each gear shaft are respectively and rotatably arranged on the same gear shaft mounting hole group, the mounting through holes and the mounting blind holes are formed in the gear shaft, the planetary gears are arranged in the planetary gear mounting positions and are arranged along the axis direction of the planet carrier, two opposite end faces of the planetary gear mounting positions are planes, and the planetary gears are matched with the two opposite end faces of the planetary gear mounting positions in a plane mode.

Optionally, a snap ring is arranged in the mounting through hole, and the snap ring can abut against the end face of the gear shaft in the mounting through hole.

Optionally, an annular groove is formed in the mounting through hole, and the snap ring is mounted in the annular groove.

Optionally, a first reinforcing flange is arranged around the periphery of the mounting blind hole and outside the inner ring, and one side of the first reinforcing flange facing the outer ring is of a planar structure.

Optionally, a second reinforcing flange is arranged around the circumference of the mounting through hole and on the inner side of the outer ring, and one side of the second reinforcing flange facing the inner ring is of a planar structure.

Optionally, the first reinforcing flange is disposed coaxially with the second reinforcing flange.

Optionally, the planet gears are bevel gears.

Optionally, the reinforcing connecting rib is in arc transition fit with the inner side surface of the outer ring.

Optionally, the reinforcing connecting ribs are in arc transition fit with the outer side surface of the inner ring.

Optionally, the planet carrier is of an integrally formed structure.

The utility model provides an interaxial connection structure for differential replaces the cross among the prior art when using, the splined hole of planet carrier is connected with differential mechanism's initiative cylindrical gear axle, strengthen connecting rib and differential mechanism shell fixed connection, install planetary gear on the gear shaft, install respectively in installation through-hole and installation blind hole at the both ends of gear shaft, so set up the arm-type arrangement of striding that has formed planetary gear, replaced the cantilever type cooperation of original cross to planetary gear's installation rigidity has been promoted, differential mechanism's normal work is guaranteed. Meanwhile, two opposite end faces of the planetary gear and the planetary gear mounting position are in plane fit, so that spherical fit in the prior art is replaced, and the requirement on machining precision is not high, so that the machining difficulty is reduced; the hole structure used for mounting the gear shaft on the inner ring is set to be a mounting blind hole, so that axial limiting can be performed on one end of the gear shaft, and the structural strength of the inner ring can be guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a sectional view of an inter-shaft connection structure for a differential according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of an inter-axle connection structure for a differential according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a planet carrier according to an embodiment of the present invention.

In the figure:

1. a planet carrier; 11. an outer ring; 12. an inner ring; 121. a splined bore; 122. a first reinforcing flange; 13. reinforcing the connecting ribs; 141. mounting a through hole; 1411. a ring groove; 142. installing blind holes; 15. a planetary gear mounting position; 16. a second reinforcing flange;

2. a planetary gear;

3. a gear shaft;

4. a snap ring.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. 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 but not all of the elements related to the present invention are shown in the drawings.

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 orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present embodiment provides an inter-axle connection structure for a differential, which can replace a cross-axle structure of an inter-axle differential in the prior art, and ensure the operational stability and reliability of the differential.

Specifically, in the present embodiment, the inter-shaft connection structure for a differential includes a carrier 1 and a planetary gear assembly.

The planet carrier 1 comprises an outer ring 11 and an inner ring 12 which are coaxially arranged, an inner hole of the inner ring 12 is a spline hole 121, a reinforcing connecting rib 13 is connected between the outer ring 11 and the inner ring 12, and the reinforcing connecting rib 13 is configured to be fixedly connected with the differential case so as to improve the reliability of the inter-axle differential case. Specifically, the reinforcing tie bars 13 are configured to be connected with the inner and outer cases of the inter-axle differential.

The planet carrier 1 further comprises four gear shaft mounting hole groups, the four gear shaft mounting hole groups are arranged at equal intervals along the circumferential direction of the planet carrier 1, each gear shaft mounting hole group comprises a mounting through hole 141 and a mounting blind hole 142 which are arranged coaxially, the mounting through hole 141 penetrates through the outer ring 11 along the axial direction of the outer ring 11, the mounting blind hole 142 is arranged on the inner ring 12 along the axial direction of the inner ring 12, and a planet gear mounting position 15 is formed between the mounting through hole 141 and the mounting blind hole 142 of each gear shaft mounting hole group. Specifically, the axes of the mounting through hole 141 and the mounting blind hole 142 extend in the same direction as the axis of the carrier 1.

The planetary gear assembly comprises four planetary gears 2 and four gear shafts 3, each gear shaft 3 is provided with one planetary gear 2, two ends of each gear shaft 3 are respectively and rotatably arranged in the mounting through holes 141 and the mounting blind holes 142 of the same gear shaft mounting hole group, the planetary gears 2 are mounted in the planetary gear mounting positions 15, two opposite end faces of the planetary gear mounting positions 15 are planes along the axis direction of the planet carrier 1, and the planetary gears 2 are in plane fit with the two opposite end faces of the planetary gear mounting positions 15.

The interaxial connection structure for the differential that this embodiment provided replaces the cross among the prior art when using, the splined hole 121 of planet carrier 1 is connected with differential's initiative roller gear axle, strengthen splice bar 13 and differential case fixed connection, install planetary gear 2 on gear shaft 3, install respectively in installation through-hole 141 and installation blind hole 142 at the both ends of gear shaft 3, so set up the arm-spanning type of having formed planetary gear 2 and arrange, the cantilever type cooperation of original cross has been replaced, thereby the installation rigidity of planetary gear 2 has been promoted, guarantee differential's normal work. Meanwhile, in the embodiment, two opposite end faces of the planetary gear 2 and the planetary gear mounting position 15 are in plane fit, so that spherical fit in the prior art is replaced, the requirement on machining precision is not high, and the machining difficulty is reduced.

In addition, in this embodiment, the hole structure for mounting the gear shaft 3 on the inner ring 12 is set as the mounting blind hole 142, so that axial limiting can be performed on one end of the gear shaft 3 located in the mounting blind hole 142, and the structural strength of the inner ring 12 can be ensured. Four gear shafts 3 are used for replacing a cross shaft structure in the prior art, the processing technology is simple, and the cost is low.

Specifically, in the present embodiment, the planetary gear 2 is a bevel gear. When the differential mechanism works, two opposite sides of the planet gear 2 exposed out of the planet carrier 1 are respectively meshed with a driving cylindrical gear and a rear bevel gear of the differential mechanism to form an inter-axle differential structure. In particular, inter-axle differential arrangements are well known in the art and will not be discussed herein in any greater detail.

Preferably, the planet carrier 1 is of an integrally formed structure, and the manufacturing process is simple. Alternatively, the planet carrier 1 may be integrally formed by a casting process. Preferably, the reinforcing connecting rib 13 is in arc transition fit with the inner side surface of the outer ring 11. The reinforcing connecting ribs 13 are in arc transition fit with the outer side surface of the inner ring 12. The arc transition fit makes the planet carrier 1 beautiful in appearance.

Preferably, in the present embodiment, a first reinforcing flange 122 is disposed around the circumference of the blind mounting hole 142 and outside the inner ring 12, and a side of the first reinforcing flange 122 facing the outer ring 11 is a planar structure. So set up, can enough guarantee that the contact surface of planetary gear 2 and inner circle 12 is the plane cooperation, can strengthen the structural strength of inner circle 12 again to strengthen planet carrier 1's structural strength.

Preferably, in the present embodiment, a second reinforcing flange 16 is provided on the inner side of the outer ring 11 around the circumference of the mounting through hole 141, and a side of the second reinforcing flange 16 facing the inner ring 12 has a planar structure. So set up, can enough guarantee that the contact surface of planetary gear 2 and outer lane 11 is the plane cooperation, can strengthen the structural strength of outer lane 11 again to strengthen planet carrier 1's structural strength.

Preferably, in the present embodiment, the first reinforcing flange 122 is disposed coaxially with the second reinforcing flange 16, and the disposition makes the planet carrier 1 beautiful on one hand and makes the stress on both ends of the planet gear 2 uniform on the other hand.

Further, in order to axially limit the other end of the gear shaft 3 during operation, a snap ring 4 is provided in the mounting through hole 141, and the snap ring 4 can abut against the end surface of the gear shaft 3 in the mounting through hole 141 to limit the gear shaft 3 in the carrier 1.

Specifically, a ring groove 1411 is provided in the mounting through hole 141, and the snap ring 4 is mounted in the ring groove 1411.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An inter-shaft connection structure for a differential, comprising:

planet carrier (1), planet carrier (1) is including outer lane (11) and inner circle (12) of coaxial setting, the hole of inner circle (12) is splined hole (121), outer lane (11) with be connected with between inner circle (12) and strengthen splice bar (13), strengthen splice bar (13) and be configured into with differential case fixed connection, planet carrier (1) still includes four gear shaft installation punch combination, four gear shaft installation punch combination follows the equidistant setting of circumference of planet carrier (1), gear shaft installation punch combination includes mounting hole (141) and installation blind hole (142) that the coaxial line set up, mounting hole (141) are followed the axis direction of outer lane (11) is worn to locate outer lane (11), installation blind hole (142) are followed the axis direction of inner circle (12) is located inner circle (12), each gear shaft installation punch combination mounting hole (141) with form the one line between the installation blind hole (142) A star gear mounting location (15);

planetary gear assembly, including four planetary gear (2) and four gear shafts (3), each all be provided with one on gear shaft (3) planetary gear (2), the both ends of gear shaft (3) are rotatable respectively set up in the same gear shaft installation hole group installation through-hole (141) with in installation blind hole (142), planetary gear (2) install in planetary gear installation position (15), follow the axis direction of planet carrier (1), two relative terminal surfaces of planetary gear installation position (15) are the plane, planetary gear (2) with two relative terminal surfaces of planetary gear installation position (15) are plane cooperation.

2. The inter-shaft connection structure for a differential according to claim 1, wherein a snap ring (4) is provided in the mounting through hole (141), and the snap ring (4) is capable of abutting against an end surface of the gear shaft (3) in the mounting through hole (141).

3. The inter-shaft connection structure for a differential gear according to claim 2, wherein a ring groove (1411) is provided in the mounting through-hole (141), and the snap ring (4) is mounted in the ring groove (1411).

4. The inter-shaft connection structure for a differential apparatus according to claim 1, wherein a first reinforcing flange (122) is provided around a circumferential direction of the blind mounting hole (142) on an outer side of the inner ring (12), and a side of the first reinforcing flange (122) facing the outer ring (11) is of a planar structure.

5. The inter-shaft connection structure for a differential according to claim 4, wherein a second reinforcing flange (16) is provided around a circumferential direction of the mounting through-hole (141) on an inner side of the outer ring (11), and a side of the second reinforcing flange (16) facing the inner ring (12) is of a planar structure.

6. The inter-shaft connection structure for a differential gear according to claim 5, wherein the first reinforcing flange (122) is disposed coaxially with the second reinforcing flange (16).

7. An inter-shaft connection structure for a differential according to any one of claims 1 to 6, characterized in that the planetary gears (2) are bevel gears.

8. The interaxial connection structure for a differential gear according to any one of claims 1 to 6, wherein the reinforcing tie-bar (13) is arc transition fitted to the inner side surface of the outer ring (11).

9. The interaxial connection structure for a differential gear according to any one of claims 1 to 6, wherein the reinforcing tie-bar (13) is in arc transition fit with the outer side surface of the inner ring (12).

10. An inter-shaft connection structure for a differential gear according to any one of claims 1 to 6, wherein the carrier (1) is of an integrally formed structure.