CN218294367U

CN218294367U - Assembly structure of main reduction gear, parking gear and differential mechanism shell

Info

Publication number: CN218294367U
Application number: CN202222248727.4U
Authority: CN
Inventors: 唐满荣; 王文波; 陈理; 方茂林; 黄虎
Original assignee: Chongqing Tsingshan Industrial Co Ltd
Current assignee: Chongqing Tsingshan Industrial Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-01-13
Anticipated expiration: 2032-08-25

Abstract

The utility model discloses an assembly structure of a main reduction gear, a parking gear and a differential shell, which comprises a differential shell, a main reduction gear with a first inner hole and a parking gear with a second inner hole, wherein the peripheral surface of the differential shell is provided with an annular bulge part, the annular bulge part is provided with a plurality of first through holes, the peripheral surface of the differential shell is also provided with a first shaft neck and a second shaft neck, and the first shaft neck and the second shaft neck are respectively positioned at two sides of the annular bulge part; a plurality of second through holes are formed in the axial end face of the main reducing gear, and the main reducing gear is sleeved on the first shaft neck in an empty mode; a plurality of third through holes are formed in the axial end face of the parking gear, and the parking gear is sleeved on the second journal in an empty mode; the differential mechanism shell is fastened with the main reduction gear and the parking gear into a whole respectively after the rivet penetrates through the first through hole and the third through hole of the second through hole. The utility model has the advantages of simple structure and low manufacturing cost.

Description

Assembly structure of main reduction gear, parking gear and differential mechanism shell

Technical Field

The utility model relates to an automotive transmission technical field, in particular to assembly structure of main reduction gear, parking gear and differential mechanism casing.

Background

The fixing of the final reduction gear 2, the parking gear 3 and the differential case 1 is currently generally achieved by means of bolts 5, as shown in fig. 6 and 7, which has the following disadvantages:

1. the parking gear 3 needs to be provided with the threaded hole 3a, which is expensive to machine.

2. The parking gear 3 is usually manufactured by using low-carbon alloy steel and then carburized and quenched to increase the strength of the parking gear in order to ensure the processing manufacturability due to the fact that the parking gear needs to bear large load, but the threaded hole 3a cannot be carburized for ensuring the toughness of the threaded hole, so that a carburization seepage-proofing agent must be coated on the surface of the threaded hole when the parking gear 3 is carburized, the seepage-proofing agent in the threaded hole 3a is difficult to clean due to the measure, the cleanliness of parts is difficult to control, and the cleaning cost is increased.

Disclosure of Invention

The utility model provides an assembly structure of main reduction gear, parking gear and differential mechanism casing that simple structure, low in manufacturing cost.

The technical scheme for solving the problems is as follows:

the assembly structure of the main reduction gear, the parking gear and the differential shell comprises a differential shell, the main reduction gear with a first inner hole and the parking gear with a second inner hole, wherein an annular bulge is arranged on the peripheral surface of the differential shell, a plurality of first through holes are formed in the annular bulge, a first shaft neck and a second shaft neck are further arranged on the peripheral surface of the differential shell, and the first shaft neck and the second shaft neck are respectively positioned on two sides of the annular bulge;

a plurality of second through holes are formed in the axial end face of the main reducing gear, and the main reducing gear is sleeved on the first shaft neck in an empty mode; a plurality of third through holes are formed in the axial end face of the parking gear, and the parking gear is sleeved on the second journal in an empty mode;

the differential mechanism shell is fastened with the main reduction gear and the parking gear into a whole after the rivets penetrate through the second through hole, the first through hole and the third through hole.

Further, the main reduction gear is clearance or transition fit with the first journal.

Further, the parking gear is clearance or transition fit with the second journal.

Furthermore, a first external spline is arranged on the circumferential surface of the first shaft neck, a second external spline is arranged on the circumferential surface of the second shaft neck, a first internal spline is arranged in an inner hole of the main reduction gear, a second internal spline is arranged in a second inner hole of the parking gear, the first internal spline on the main reduction gear is matched with the first external spline, and the second internal spline on the parking gear is matched with the second external spline.

Furthermore, the first through hole, the second through hole and the third through hole are all unthreaded holes, and the first through hole, the second through hole and the third through hole are aligned one by one during assembly.

The utility model discloses in, all fix main reduction gear and parking gear on the differential mechanism casing through the rivet, be rotary motion with the differential mechanism casing together, the benefit of this kind of structure lies in, on the one hand, only needs to be processed first through-hole, second through-hole, third through-hole into the unthreaded hole, and need not process into the screw hole, has saved the cost of machine tooling. And secondly, because the first through hole, the second through hole and the third through hole are unthreaded holes, the surfaces of the first through hole, the second through hole and the third through hole do not need to be coated with the carburizing and seepage-proofing agent, so that the cleanness of parts is controlled, the problem of difficulty in cleaning the carburizing and seepage-proofing agent is avoided, and the use cost of the material is reduced because the carburizing and seepage-proofing agent is not coated any more. In the third aspect, the radial supporting effect of the first journal on the main reduction gear and the supporting effect of the second journal on the parking gear are utilized, so that the radial acting force of the gravity of the main reduction gear and the parking gear on the rivet is avoided, and meanwhile, the radial acting force of the centrifugal force of the main reduction gear and the parking gear on the rivet in the rotating process is reduced, so that the radial acting force borne by the rivet is greatly reduced, and the condition that the rivet is broken after long-term work is avoided.

Based on the structure, the utility model has the characteristics of simple structure, simple installation, low in manufacturing cost, cleanliness are easily controlled, parking gear's cost prior art relatively can reduce 30%.

Drawings

FIG. 1 is a schematic structural view of a main reduction gear, a parking gear and a differential case of the present invention;

FIG. 2 is a front view of the differential;

FIG. 2a is a side view of FIG. 2;

FIG. 3 is a schematic view of the main reduction gear;

FIG. 4 is a schematic structural view of a parking gear;

FIG. 5 is an exploded view of the main reduction gear, parking gear and differential housing of the present invention;

FIG. 6 is a schematic diagram of a main reduction gear, a parking gear and a differential case according to the prior art;

FIG. 7 is an exploded view of a final drive gear, a park gear and a differential case of the prior art;

reference numbers in the drawings:

the differential gear comprises a differential case 1, an annular boss 1a, a first through hole 1b, a first journal 1c, a second journal 1d, a main reduction gear 2, a second through hole 2a, a parking gear 3, a third through hole 3a, rivets 4 and bolts 5.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the scope of the invention.

In order to make the purpose, technical solution and advantages of the present invention clearer, the drawings in the embodiments of the present invention are combined, and the technical solution in the embodiments of the present invention is described in more detail. The described embodiments are some, but not all embodiments of the invention. The embodiments described by way of reference to the drawings are exemplary and intended to be used for the purpose of explanation of the invention, and should not be construed as simply limiting the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

The assembly structure of the main reducing gear, the parking gear and the differential shell comprises a differential shell 1, a main reducing gear 2 with a first inner hole, a parking gear 3 with a second inner hole and a rivet 4, wherein each part and the relationship among the parts are respectively explained as follows:

the peripheral surface of the differential case 1 is provided with an annular convex part 1a, the annular convex part 1a is provided with a plurality of first through holes 1b, the peripheral surface of the differential case 1 is further provided with a first journal 1c and a second journal 1d, and the first journal 1c and the second journal 1d are respectively positioned at two sides of the annular convex part 1 a.

The rotation axes of the first journal 1c and the second journal 1d are coaxial with the rotation axis of the differential case 1, the outer diameters of the first journal 1c and the second journal 1d are smaller than the outer diameter of the annular boss portion 1a, and the first journal 1c and the second journal 1d are formed integrally with the differential case and then subjected to precision cutting by machining. A plurality of first through-holes 1b are evenly distributed on the annular boss 1a, and the first through-holes 1b are mainly used for being matched with the rivets 4.

A plurality of second through holes 2a are arranged on the axial end face of the main reduction gear 2, the main reduction gear 2 is sleeved on the first journal 1c in an empty mode, and the main reduction gear 2 is in clearance or transition fit with the first journal 1 c. A plurality of second through holes 2a are uniformly arranged along the circumferential direction of the main reduction gear 2, the second through holes 2a being mainly used for fitting with the rivets 4.

A plurality of third through holes 3a are formed in the axial end face of the parking gear 3, and the parking gear 3 is sleeved on the second journal 1d in an empty mode; the parking gear 3 is clearance or transition fitted with the second journal 1 d. A plurality of third through holes 3a are uniformly arranged along the circumferential direction of the parking gear 3, and the third through holes 3a are mainly used for fitting with the rivets 4.

During assembly, align third through-hole 3a on the parking gear 3, first through-hole 1b on differential mechanism casing 1, second through-hole 2a on the main reduction gear 2, after rivet 4 passed second through-hole 2a, first through-hole 1b and third through-hole 3a, rivet 4 was locked through riveting machine pressure rivet to make differential mechanism casing 1 fasten integratively with main reduction gear 2 and parking gear 3 respectively.

In the present embodiment, it is preferable that a first external spline is provided on the circumferential surface of the first journal 1c, a second external spline is provided on the circumferential surface of the second journal 1d, a first internal spline is provided in the inner hole of the main reduction gear 2, a second internal spline is provided in the second inner hole of the parking gear 3, the first internal spline on the main reduction gear 2 is engaged with the first external spline, and the second internal spline on the parking gear 3 is engaged with the second external spline.

First journal 1c passes through spline fit with main reducing gear 2 to and second journal 1d passes through spline fit with parking gear 3, and the during operation is favorable to making the shearing force that rivet 4 received reduce, avoids rivet 4 to break because of the atress process.

The utility model discloses in, all fix final gear 2 and parking gear 3 on differential mechanism casing 1 through rivet 4, be rotary motion with differential mechanism casing 1 together, the benefit of this kind of structure lies in, on the one hand, only need process first through-hole 1b, second through-hole 2a, third through-hole 3a into the unthreaded hole, and need not process into the screw hole, has saved the cost of machining. Secondly, because the first through hole 1b, the second through hole 2a and the third through hole 3a are unthreaded holes, the carburization anti-seepage agent does not need to be coated on the surfaces of the first through hole 1b, the second through hole 2a and the third through hole 3a, so that the cleanness of parts is controlled, the problem of difficulty in cleaning the carburization anti-seepage agent is avoided, and the use cost of the material is reduced because the carburization anti-seepage agent is not coated any more. In the third aspect, the radial supporting effect of the first journal 1c on the main reduction gear 2 and the supporting effect of the second journal 1d on the parking gear 3 are used, so that the radial acting force of the gravity of the main reduction gear 2 and the parking gear 3 on the rivet 4 is avoided, and the radial acting force of the centrifugal force of the main reduction gear 2 and the parking gear 3 on the rivet 4 in the rotating process is also reduced, so that the radial acting force borne by the rivet 4 is greatly reduced, and the condition that the rivet 4 is broken after long-term operation is avoided.

Claims

1. The assembling structure of the main reduction gear, the parking gear and the differential shell comprises a differential shell (1), the main reduction gear (2) with a first inner hole and the parking gear (3) with a second inner hole, and is characterized in that an annular bulge (1 a) is arranged on the circumferential surface of the differential shell (1), a plurality of first through holes (1 b) are formed in the annular bulge (1 a), a first journal (1 c) and a second journal (1 d) are further arranged on the circumferential surface of the differential shell (1), and the first journal (1 c) and the second journal (1 d) are respectively located on two sides of the annular bulge (1 a);

a plurality of second through holes (2 a) are formed in the axial end face of the main reduction gear (2), and the main reduction gear (2) is sleeved on the first journal (1 c) in an empty mode; a plurality of third through holes (3 a) are formed in the axial end face of the parking gear (3), and the parking gear (3) is sleeved on the second journal (1 d) in an empty mode;

the differential mechanism further comprises a rivet (4), and after the rivet (4) penetrates through the second through hole (2 a), the first through hole (1 b) and the third through hole (3 a), the differential mechanism shell (1) is fastened with the main reduction gear (2) and the parking gear (3) into a whole respectively.

2. A final reduction gear, parking gear and differential case assembly structure according to claim 1, characterized in that the final reduction gear (2) is clearance or transition fitted with the first journal (1 c).

3. A final reduction gear, parking gear and differential case assembly structure according to claim 1, characterized in that the parking gear (3) is clearance or transition fitted with the second journal (1 d).

4. The structure for assembling a main reduction gear, a parking gear and a differential case according to claim 1, wherein a first external spline is provided on a circumferential surface of the first journal (1 c), a second external spline is provided on a circumferential surface of the second journal (1 d), a first internal spline is provided in an inner hole of the main reduction gear (2), a second internal spline is provided in a second inner hole of the parking gear (3), the first internal spline on the main reduction gear (2) is engaged with the first external spline, and the second internal spline on the parking gear (3) is engaged with the second external spline.

5. A structure for assembling a final gear, a parking gear, and a differential case according to claim 1, wherein the first through hole (1 b), the second through hole (2 a), and the third through hole (3 a) are all smooth holes, and the first through hole (1 b), the second through hole (2 a), and the third through hole (3 a) are aligned one by one during assembly.