CN210318413U

CN210318413U - Cross axle structure and interaxial differential mechanism

Info

Publication number: CN210318413U
Application number: CN201921142197.7U
Authority: CN
Inventors: 冯涛; 王震; 王林国
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-14
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a differential mechanism technical field specifically discloses a cross axle structure and interaxial differential mechanism, this cross axle structure is including two first planet gear shafts and two second planet gear shafts that equal coaxial and relative set up, the axis of second planet gear shaft is perpendicular with the axis of first planet gear shaft, two second planet gear shafts are pegged graft respectively in two relative slots that the junction of two first planet gear shafts formed, be equipped with two on the driving shaft and be the crisscross through-hole of cross form, the axis of each through-hole is all perpendicular with the axis of driving shaft, two first planet gear shafts and two second planet gear shafts connect respectively in two through-holes. Through the driving shaft and the shaft hole cooperation of first planet gear axle and second planet gear axle, the spline connection that adopts between the alternative cross axle structure and the driving shaft among the prior art can effectively prevent the cracked problem of splined hole to the cost of this cross axle structure has been reduced. The inter-axle differential includes the above-described cross-axle structure.

Description

Cross axle structure and interaxial differential mechanism

Technical Field

The utility model relates to a differential mechanism technical field especially relates to a cross axle structure and interaxial differential mechanism.

Background

The cross shaft of the inter-axle differential mechanism in the through axle of the automobile generally adopts an integrated structure, four shafts of the cross shaft are uniformly distributed on a mounting ring in the middle, and the mounting ring is provided with spline holes and is sleeved with a cylindrical gear shaft through a spline structure. As disclosed in the prior application No. CN201310740756.5, an inter-axle differential having NGW planetary gears, and as disclosed in the prior application No. cn03148347.x, a lubrication pump for an inter-axle differential, both of which cross-shaft and cylindrical gear shaft are connected by splines.

Although the spline structure can ensure that the cross shaft and the cylindrical gear shaft are stably connected, the problem that the position of a spline hole of the cross shaft is broken frequently occurs in the actual use process of the spline structure, and further the transmission function is failed; meanwhile, the production cost of the cross shaft with the spline structure is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a cross axle structure and interaxial differential to solve among the prior art and adopt the cross axle of interaxial differential to pass through spline structure and cylindrical gear hub connection, lead to cracked problem in cross axle splined hole position, and the higher problem of manufacturing cost of the cross axle of spline structure.

In one aspect, the utility model provides a cross axle structure, this cross axle structure includes:

the two first planetary gear shafts are in butt joint, and two opposite slots are formed at the joint of the two first planetary gear shafts;

the two second planetary gear shafts are coaxially and oppositely arranged, the axes of the second planetary gear shafts are vertical to the axis of the first planetary gear shaft, and the two second planetary gear shafts are respectively inserted into the two slots;

the driving shaft is provided with two crossed through holes, the axis of each through hole is perpendicular to the axis of the driving shaft, the axis of each through hole is intersected with the axis of the driving shaft, the two first planetary gear shafts are inserted into one of the through holes, and the two second planetary gear shafts are inserted into the other through hole.

As a preferable technical scheme of the cross shaft structure, the two first planetary gear shafts are integrally arranged.

On the other hand, the utility model provides an interaxial differential mechanism, cross axle structure in above-mentioned arbitrary scheme, interaxial differential mechanism still includes:

a differential housing having an accommodating chamber therein;

the driving shaft is rotatably arranged in the differential shell in a penetrating way;

the driving gear is positioned in the accommodating cavity and is rotatably sleeved on the driving shaft;

the rear half shaft gear is positioned in the accommodating cavity, is rotatably sleeved on the driving shaft, and is respectively positioned at the front end and the rear end of the cross shaft structure along the axial direction of the driving shaft;

the two first planet gear shafts and the two second planet gear shafts are respectively provided with one planet gear, and the planet gears are respectively meshed with the driving gear and the rear half shaft gear;

the fixed cover of sliding gear cover is located the driving shaft, the sliding gear cover is located the front end of driving gear, the sliding gear cover with the driving gear meshing.

As the preferred technical scheme of interaxial differential, interaxial differential still includes front bearing and the rear bearing of relative setting, the front bearing is located the front end of sliding gear cover, the outer lane of front bearing with the outer lane of rear bearing all with differential casing rigid coupling, the inner circle of front bearing with the driving shaft rigid coupling, the inner circle of rear bearing with rear half shaft gear rigid coupling.

As the preferred technical scheme of interaxle differential, interval and relative first step face and second step face are equipped with on the driving shaft, the rear end face of the inner circle of front bearing with first step face butt, the preceding terminal surface of latter half shaft gear with second step face butt, be equipped with the third step face on the latter half shaft gear, the preceding terminal surface of the inner circle of back bearing with third step face butt.

As a preferred technical scheme of the inter-axle differential, the inter-axle differential further comprises a needle bearing set, a fourth step surface opposite to the first step surface is further arranged on the driving shaft, a front end cover of the needle bearing set is abutted against the fourth step surface, and a rear end cover of the needle bearing set is abutted against the front end surface of the driving gear.

As a preferred technical scheme of the interaxle differential, the interaxle differential further comprises a flange sleeved at the front end of the driving shaft and a locking bolt screwed at the front end of the driving shaft, wherein the locking bolt is abutted against the front end face of the flange, and the rear end face of the flange is abutted against the front end face of the inner ring of the front bearing.

As the preferable technical scheme of the interaxial differential, the driving shaft is provided with an external spline, the flange is provided with an internal spline, and the internal spline is connected with the external spline.

As a preferred technical scheme of the inter-axle differential, the inter-axle differential further comprises a planetary gear shell sleeved on the driving shaft, the outer end surface of the planetary gear is spherical along the radial direction of the driving shaft, a cavity is arranged in the planetary gear shell, each planetary gear is located in the cavity, the inner surface of the cavity is spherical, and the outer end surface of each planetary gear is attached to the inner surface of the cavity.

As the preferable technical scheme of the interaxle differential, the sliding gear sleeve is connected with the driving shaft key.

The utility model has the advantages that:

the utility model provides a cross axle structure, this cross axle structure include two first planet gear axles and two second planet gear axles. The two first planetary gear shafts are coaxially and oppositely arranged, the two first planetary gear shafts are abutted, two opposite inserting grooves are formed at the joint of the two first planetary gear shafts, the two inserting grooves are respectively arranged on the peripheral surfaces of the two integrally arranged first planetary gear shafts, the two second planetary gear shafts are coaxially and oppositely arranged, the axes of the second planetary gear shafts are perpendicular to the axes of the first planetary gear shafts, the two second planetary gear shafts are respectively inserted into the two inserting grooves, the driving shaft is provided with two crossed through holes in a cross shape, the axes of the through holes are perpendicular to the axis of the driving shaft, the axes of the through holes are intersected with the axis of the driving shaft, the two first planetary gear shafts are inserted into one through hole, and the two second planetary gear shafts are inserted into the other through hole. Through the driving shaft and the shaft hole cooperation of first planet gear axle and second planet gear axle, the spline connection that adopts between the alternative cross axle structure and the driving shaft among the prior art can effectively prevent the cracked problem of splined hole to the cost of this cross axle structure has been reduced.

Drawings

Fig. 1 is a first schematic structural view of an inter-axle differential according to an embodiment of the present invention;

FIG. 2 is a second schematic structural view of an inter-axle differential according to an embodiment of the present invention;

fig. 3 is a sectional view taken along a-a in fig. 2.

In the figure:

1. a differential housing; 2. a drive shaft; 3. a driving gear; 4. a rear half shaft gear; 5. a sliding gear sleeve; 6. a cross-axle structure; 7. a planetary gear; 8. a front bearing; 9. a rear bearing; 10. a flange; 20. locking the bolt; 30. a planetary gear housing; 40. a hexagon socket head cap screw; 50. a driven gear; 60. a needle roller bearing set;

21. a first step surface; 22. a second step surface; 23. a fourth step surface; 24. a through hole;

41. a third step surface;

61. a first planet gear shaft; 62. and a second planet gear shaft.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

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. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means 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 invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, the present embodiment provides an inter-axle differential, which includes a differential housing 1, a driving shaft 2, a driving gear 3, a rear half-axle gear 4, a sliding gear sleeve 5, a cross-axle structure 6, and four planetary gears 7.

The inside of differential mechanism casing 1 is equipped with and holds the chamber, and driving shaft 2 rotates and wears to locate differential mechanism casing 1. In this embodiment, differential housing 1 is provided with two coaxial mounting holes that all set up relatively, and two mounting holes all communicate with holding the chamber. The two ends of the driving shaft 2 are located in the two mounting holes. The driving gear 3, the rear half shaft gear 4, the sliding gear sleeve 5, the cross shaft structure 6 and the four planet gears 7 are all located in the accommodating cavity. The driving gear 3 and the rear half shaft gear 4 are both sleeved on the driving shaft 2. And the driving gear 3 and the rear half shaft gear 4 are respectively positioned at the front end and the rear end of the cross shaft structure 6 along the axial direction of the driving shaft 2. In the present embodiment, the front-rear direction refers to the axial direction of the drive shaft 2, and the drive gear 3 is located forward of the rear half shaft gear 4.

The spider structure 6 comprises two first planet pins 61 and two second planet pins 62. The two first planetary gear shafts 61 are coaxially and oppositely arranged, the two first planetary gear shafts 61 are abutted, and the joint of the two first planetary gear shafts 61 forms two opposite slots. Preferably, the two first planetary gear shafts 61 are integrally provided, and the two insertion grooves are both provided on the outer circumferential surfaces of the integrally provided two first planetary gear shafts 61. The two second planet shafts 62 are coaxially and oppositely arranged, the axes of the second planet shafts 62 are perpendicular to the axis of the first planet shaft 61, and the two second planet shafts 62 are respectively inserted into the two slots. The driving shaft 2 is provided with two crossed through holes 24, the axis of each through hole 24 is perpendicular to the axis of the driving shaft 2, the axis of each through hole 24 is intersected with the axis of the driving shaft 2, the two first planetary gear shafts 61 are inserted into one through hole 24, and the two second planetary gear shafts 62 are inserted into the other through hole 24. It is understood that the outer diameters of the first planetary gear shafts 61 and the second planetary gear shafts 62 are matched with the bore diameters of the corresponding through holes 24.

Two planetary gears 7 are respectively arranged on the two first planetary gear shafts 61 and the two second planetary gear shafts 62, the planetary gears 7 are respectively meshed with the driving gear 3 and the rear half shaft gear 4, the driving shaft 2 is fixedly sleeved with the sliding gear sleeve 5, the sliding gear sleeve 5 is positioned at the front end of the driving gear 3, and the sliding gear sleeve 5 is meshed with the driving gear 3. Preferably, the sliding gear sleeve 5 is keyed to the drive shaft 2.

In the inter-axle differential provided by the embodiment, when the driving gear 3 rotates, the driving gear 3 drives each planetary gear 7 to rotate, and then drives the rear half axle gear 4 to rotate. Through the axle hole cooperation of driving shaft 2 with first planet gear axle 61 and second planet gear axle 62, the spline connection that adopts among the fungible prior art can effectively prevent the cracked problem of spline hole to the cost of this cross axle structure 6 has been reduced.

Optionally, the interaxle differential further includes a driven gear 50 engaged with the driving gear 3. The axis of the driven gear 50 is parallel to the axis of the drive gear 3.

Optionally, the inter-axle differential further includes a front bearing 8 and a rear bearing 9 disposed opposite to each other, the front bearing 8 is located at the front end of the sliding gear sleeve 5, an outer ring of the front bearing 8 and an outer ring of the rear bearing 9 are both fixedly connected to the differential housing 1, an inner ring of the front bearing 8 is fixedly connected to the driving shaft 2, and an inner ring of the rear bearing 9 is fixedly connected to the rear half-shaft gear 4. The drive shaft 2 can be axially positioned by means of a front bearing 8 and a rear bearing 9.

Alternatively, the drive shaft 2 is provided with a first step surface 21 and a second step surface 22 at an interval and opposite to each other, the rear end surface of the inner race of the front bearing 8 abuts against the first step surface 21, the front end surface of the rear half shaft gear 4 abuts against the second step surface 22, the rear half shaft gear 4 is provided with a third step surface 41, and the front end surface of the inner race of the rear bearing 9 abuts against the third step surface 41. Preferably, the front bearing 8 and the rear bearing 9 are both tapered roller bearings.

Optionally. The inter-axle differential further comprises a needle bearing group 60, a fourth step surface 23 opposite to the first step surface 21 is further arranged on the driving shaft 2, a front end cover of the needle bearing group 60 is abutted with the fourth step surface 23, and a rear end cover of the needle bearing group 60 is abutted with the front end surface of the driving gear 3. The fourth step surface 23 is arranged to facilitate axial positioning of the driving gear 3, and the needle bearing assembly 60 is arranged to facilitate reduction of friction between the driving gear 3 and the driving shaft 2 during rotation of the driving gear 3.

Optionally, the inter-axle differential further comprises a flange 10 sleeved on the front end of the driving shaft 2, and a locking bolt 20 screwed on the front end of the driving shaft 2, wherein the locking bolt 20 abuts against the front end face of the flange 10, and the rear end face of the flange 10 abuts against the front end face of the inner ring of the front bearing 8. Preferably, the driving shaft 2 is provided with an external spline, and the flange 10 is provided with an internal spline, and the internal spline is connected with the external spline.

The interaxial differential mechanism further comprises a planetary gear shell 30 sleeved on the driving shaft 2, the outer end surface of the planetary gear is a spherical surface along the radial direction of the driving shaft 2, a cavity is arranged in the planetary gear shell 30, each planetary gear is located in the cavity, the inner surface of the cavity is a spherical surface, and the outer end surface of the planetary gear is attached to the inner surface of the cavity. Preferably, the planetary gear housing 30 includes two opposite planetary gear left and right housings fixed by four hexagon socket head cap bolts 40. Set up four screw holes on one of left casing of planetary gear and the right casing of planetary gear, correspond every screw hole on another and all set up connect the through-hole, each hexagon socket head cap screw 40 all passes corresponding screw hole and connect the through-hole in proper order and fixes left casing of planetary gear and the right casing of planetary gear together.

It is obvious that 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. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. 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. A cross axle structure for mounting on a drive shaft (2), comprising:

two first planetary gear shafts (61) which are coaxially and oppositely arranged, the two first planetary gear shafts (61) are abutted, and two opposite slots are formed at the joint of the two first planetary gear shafts (61);

two second planet gear shafts (62) which are coaxially and oppositely arranged, wherein the axes of the second planet gear shafts (62) are vertical to the axis of the first planet gear shaft (61), and the two second planet gear shafts (62) are respectively inserted into the two slots;

the driving shaft (2) is provided with two crossed through holes (24), the axis of each through hole (24) is perpendicular to the axis of the driving shaft (2), the axis of each through hole (24) is intersected with the axis of the driving shaft (2), the two first planetary gear shafts (61) are inserted into one through hole (24), and the two second planetary gear shafts (62) are inserted into the other through hole (24).

2. The cross-axle structure according to claim 1, wherein two first planetary gear shafts (61) are provided integrally.

3. An inter-axle differential, characterized in that it comprises a cross-axle construction (6) according to claim 1 or 2, said inter-axle differential further comprising:

the differential mechanism comprises a differential mechanism shell (1), wherein an accommodating cavity is formed in the differential mechanism shell;

the driving shaft (2) is rotatably arranged in the differential shell (1) in a penetrating way;

the driving gear (3) is positioned in the accommodating cavity and is rotatably sleeved on the driving shaft (2);

the rear half shaft gear (4) is positioned in the accommodating cavity, is rotatably sleeved on the driving shaft (2), and is respectively positioned at the front end and the rear end of the cross shaft structure (6) along the axial direction of the driving shaft (2);

the four planet gears (7), two first planet gear shafts (61) and two second planet gear shafts (62) are respectively provided with one planet gear (7), and the planet gears (7) are respectively meshed with the driving gear (3) and the rear half shaft gear (4);

sliding gear cover (5), fixed cover are located driving shaft (2), sliding gear cover (5) are located the front end of driving gear (3), sliding gear cover (5) with driving gear (3) meshing.

4. The interaxle differential according to claim 3 further comprising a front bearing (8) and a rear bearing (9) disposed opposite to each other, wherein the front bearing (8) is located at a front end of the sliding gear sleeve (5), an outer ring of the front bearing (8) and an outer ring of the rear bearing (9) are both fixedly connected to the differential case (1), an inner ring of the front bearing (8) is fixedly connected to the driving shaft (2), and an inner ring of the rear bearing (9) is fixedly connected to the rear half shaft gear (4).

5. An interaxle differential according to claim 4 wherein the drive shaft (2) has a first step surface (21) and a second step surface (22) spaced apart from each other and opposed to each other, the rear end surface of the inner race of the front bearing (8) abuts against the first step surface (21), the front end surface of the rear half shaft gear (4) abuts against the second step surface (22), the rear half shaft gear (4) has a third step surface (41), and the front end surface of the inner race of the rear bearing (9) abuts against the third step surface (41).

6. The interaxle differential according to claim 5, further comprising a needle roller bearing group (60), wherein the drive shaft (2) is further provided with a fourth step surface (23) opposite to the first step surface (21), a front end cover of the needle roller bearing group (60) abuts against the fourth step surface (23), and a rear end cover of the needle roller bearing group (60) abuts against a front end surface of the drive gear (3).

7. An interaxle differential according to claim 4 further comprising a flange (10) fitted around the front end of the drive shaft (2), and a lock bolt (20) screwed to the front end of the drive shaft (2), wherein the lock bolt (20) abuts against a front end surface of the flange (10), and a rear end surface of the flange (10) abuts against a front end surface of an inner race of the front bearing (8).

8. An interaxle differential according to claim 7 wherein the drive shaft (2) is provided with external splines and the flange (10) is provided with internal splines, the internal splines being keyed to the external splines.

9. An interaxle differential according to claim 3 further comprising a planetary gear case (30) fitted around the drive shaft (2), wherein an outer end surface of the planetary gear is formed in a spherical surface along a radial direction of the drive shaft (2), a cavity is formed in the planetary gear case (30), each planetary gear is located in the cavity, an inner surface of the cavity is formed in a spherical surface, and an outer end surface of the planetary gear is fitted to an inner surface of the cavity.

10. An interaxle differential according to claim 3 wherein the sliding gear sleeve (5) is keyed to the drive shaft (2).