CN113154008A

CN113154008A - Driven bevel gear of integral type

Info

Publication number: CN113154008A
Application number: CN202110514941.7A
Authority: CN
Inventors: 李鹏飞; 王明明; 赵喜一; 胡东阳
Original assignee: Dongfeng Dana Axle Co Ltd
Current assignee: Dongfeng Dana Axle Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-07-23

Abstract

The invention relates to an integrated driven bevel gear, which comprises a left differential shell, wherein the left differential shell comprises a disk body and a transmission shaft, the disk body is of a circular plate-shaped structure, the transmission shaft is fixedly connected to the middle part of one side of the disk body, the middle part of the transmission shaft penetrates through a mounting hole along the length direction of the transmission shaft, and tapered teeth are uniformly formed on the outer edge of the disk body at intervals along the circumferential direction of the outer edge of the disk body and serve as meshing teeth of the driven bevel gear; the technical problems that in the prior art, the transmission stability of a split type driven bevel gear structure is low and the development cost is high are solved.

Description

Driven bevel gear of integral type

Technical Field

The invention relates to a power transmission part of an automobile drive axle, in particular to an integrated driven bevel gear.

Background

The main reducer driving/driven bevel gear (curve tooth bevel gear) of the automobile drive axle is the core power transmission component of the whole drive axle, the driving/driven bevel gear is widely used for the drive axle of medium and heavy-duty automobiles, and the whole power transmission chain is as follows: the engine outputs power, the power is transmitted to the driving bevel gear through the transmission shaft, the driving bevel gear drives the driven bevel gear to break in transmission, and larger power is transmitted to the driven bevel gear through speed reduction and torque increase; the driven bevel gear drives the differential case assembly to rotate, power is transmitted to the left half shaft and the right half shaft by means of the left half shaft gear and the right half shaft gear, the left half shaft and the right half shaft drive the left wheel and the right wheel to rotate, and the automobile runs.

The driven bevel gear structural style that uses usually at present is split type, mainly adopts the mode of assembly to install driven bevel gear's rim plate and differential mechanism casing together, but difficult avoid producing assembly error in the assembling process, and then influences the meshing driven stationarity of driven bevel gear's other parts to, because driven bevel gear and differential mechanism casing adopt the assembly form installation, just so need two sets of moulds to make respectively in process of production, lead to the increase of development cost.

Disclosure of Invention

Based on the expression, the invention provides an integrated driven bevel gear to solve the technical problems that in the prior art, a split driven bevel gear structure is low in transmission stability and high in development cost.

The technical scheme for solving the technical problems is as follows: the utility model provides a driven bevel gear of integral type, includes the poor shell in a left side, the poor shell in a left side includes disk body and transmission shaft, the disk body is circular platelike structure, transmission shaft fixed connection in the middle part of disk body one side, the middle part of transmission shaft runs through along its length direction and is formed with the mounting hole, the outside edge of disk body is formed with tapered tooth along its circumference even interval to as driven bevel gear's meshing tooth.

Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

according to the integrated driven bevel gear, the meshing teeth of the driven bevel gear are formed by machining the edge of the disc body of the left differential shell, the left differential shell and the driven bevel gear are integrated into an integrated structure, one part replaces a plurality of original parts, and the functions of the original parts are born, so that the high integration degree and the light weight of parts are realized, the assembly error in the assembly process of the speed reducer assembly is reduced, the meshing transmission stability of the driving bevel gear and the driven bevel gear is improved, the number of dies can be effectively reduced, and the development cost of the speed reducer assembly is reduced; due to the structural design of the integrated driven bevel gear, on one hand, the self weight of the part of parts can be reduced; on the other hand, because the size specification of the reduction shell is properly reduced, the size of the speed reducer assembly is reduced, the structure of the differential assembly is more compact, the occupied space is smaller, the lightweight design of the speed reducer assembly is facilitated, in addition, a plurality of original parts are integrated into one part, the integrity is stronger, and the structural rigidity of the part is greatly enhanced.

On the basis of the technical scheme, the invention can be further improved as follows.

Furthermore, a clutch structure matched with the differential lock is formed on the end face of one end, far away from the disc body, of the transmission shaft.

Furthermore, the clutch structure is a plurality of fixed clutch teeth which are uniformly distributed around the axial line of the transmission shaft in the circumferential direction.

After adopting above-mentioned technical scheme, its beneficial effect is: the fixed clutch tooth part in the differential lock is integrated together, an original independent part fixed clutch sleeve is omitted, the size and specification of the reduction shell are further reduced, the structure of the speed reducer assembly is more compact, the size is smaller, and the light weight design of the speed reducer assembly is further facilitated.

Furthermore, the outer side wall of the transmission shaft is provided with at least one lightening hole communicated with the mounting hole.

Furthermore, the number of the weight reducing holes is three, and the three weight reducing holes are uniformly distributed around the axis of the transmission shaft.

Furthermore, an annular step is formed at one end, far away from the disc body, of the transmission shaft, the outer diameter of the annular step is smaller than that of the transmission shaft, and an inner through hole of the annular step is coaxially formed with the mounting hole and communicated with the mounting hole.

Furthermore, at least one weight-reducing groove extending along the axial direction of the transmission shaft in the length direction is formed in the inner side wall of the transmission shaft, one end of the weight-reducing groove is located at the joint of the annular step and the transmission shaft, and the other end of the weight-reducing groove extends to the opening of the mounting hole.

Furthermore, the number of the weight reducing grooves is three, and the three weight reducing grooves are arranged in one-to-one correspondence with the weight reducing holes.

After adopting above-mentioned technical scheme, its beneficial effect is: the weight reducing holes are uniformly distributed on the transmission shaft, and the weight reducing grooves are uniformly distributed in the inner cavity of the transmission shaft, so that the integral driven bevel gear is beneficial to further reducing weight of the integral driven bevel gear.

Furthermore, one side of the disc body, which is far away from the transmission shaft, is formed with a circular groove, and the circular groove is coaxially arranged with the mounting hole and is communicated with the mounting hole.

Furthermore, a plurality of assembly holes penetrating through the disc body along the axis are formed in the circular groove, and the assembly holes are uniformly distributed around the axis of the disc body at intervals.

Drawings

Fig. 1 is a schematic perspective view of an integrated driven bevel gear according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic perspective view of an integrated driven bevel gear according to another embodiment of the present invention;

fig. 4 is a schematic cross-sectional structure of fig. 3.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a tray body; 2. a drive shaft; 11. tapered teeth; 21. an annular step; 22. fixing the clutch teeth; 2a, mounting holes; 2b, lightening holes; 2c, a weight reduction groove; 21a, internal through holes.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

As shown in fig. 1 and 2, the application provides an integral type driven bevel gear, including a left differential case, the left differential case includes disk body 1 and transmission shaft 2, disk body 1 is circular platelike structure, transmission shaft 2 fixed connection in the middle part of disk body 1 one side, the middle part of transmission shaft 2 runs through along its length direction and is formed with mounting hole 2a, the outside edge of disk body 1 is formed with tapered tooth 11 along its circumference even interval to as driven bevel gear's meshing tooth.

According to the integrated driven bevel gear provided by the embodiment of the application, the edge of the disc body 1 of the left differential shell is machined to form the meshing teeth of the driven bevel gear, the left differential shell and the driven bevel gear are integrated into an integrated structure, one part is used for replacing a plurality of original parts, and the functions of the original parts are born, so that the high integration degree and the light weight of parts are realized, the assembly error in the assembly process of the speed reducer assembly is reduced, the meshing transmission stability of the driving bevel gear and the driven bevel gear is improved, the number of dies can be effectively reduced, and the development cost of the speed reducer assembly is reduced; due to the structural design of the integrated driven bevel gear, on one hand, the self weight of the part of parts can be reduced; on the other hand, because the size specification of the reduction shell is properly reduced, the size of the speed reducer assembly is reduced, the structure of the differential assembly is more compact, the occupied space is smaller, the lightweight design of the speed reducer assembly is facilitated, in addition, a plurality of original parts are integrated into one part, the integrity is stronger, and the structural rigidity of the part is greatly enhanced.

In some embodiments of the present application, the outer side wall of the propeller shaft 2 is formed with 3 lightening holes 2b, and the 3 lightening holes 2b are uniformly distributed around the axis of the propeller shaft 2.

It is understood that the number of lightening holes 2b can be increased or decreased according to the actual situation.

In some preferred embodiments, an end of the transmission shaft 2 away from the disc body 1 is formed with an annular step 21, an outer diameter dimension of the annular step 21 is smaller than an outer diameter dimension of the transmission shaft 2, and an inner through hole 21a of the annular step 21 is coaxially arranged with the mounting hole 2b and is communicated with each other.

More preferably, 3 weight-reducing grooves 2c are formed in the inner side wall of the transmission shaft, the length direction of each weight-reducing groove 2c extends along the axial direction of the transmission shaft 2, one end of each weight-reducing groove 2c is located at the joint of the annular step 21 and the transmission shaft 2, the other end of each weight-reducing groove extends to the opening of the mounting hole 2a, and more preferably, the three weight-reducing grooves 2c and the weight-reducing holes 2b are arranged in a one-to-one correspondence manner, so that the weight-reducing grooves 2c can be conveniently formed, and drilling of the weight-reducing holes 2b can be conveniently performed.

Through being equipped with the lightening hole 2b of equipartition, the inner chamber is equipped with the lightening groove 2c of equipartition on transmission shaft 2, is favorable to this driven bevel gear of integral type self to subtract heavy further.

In some preferred embodiments of the present application, as shown in fig. 3 and 4, a clutch structure for engaging with the differential lock is formed on an end surface of the end of the transmission shaft 2 away from the disk body 1, wherein in some embodiments, the clutch structure is a plurality of fixed clutch teeth 22 uniformly distributed circumferentially around an axis of the transmission shaft 2, in this embodiment, the fixed clutch teeth are formed on an end surface of the annular step 21, the embodiment integrally designs a fixed clutch tooth portion in the differential lock, cancels an original separate part fixed clutch sleeve, further reduces a size specification of a reduction case, and is more compact in structure and smaller in size, thereby further facilitating a lightweight design of the reduction case assembly.

In some embodiments of this application, disk body 1 deviates from one side of transmission shaft 2 is formed with circular recess 1a, circular recess 1a with the coaxial setting of mounting hole 2a and intercommunication each other, wherein, the inside of circular recess 1a forms a plurality of its axes of edge and runs through the pilot hole 1b of disk body 1, pilot hole 1b winds the even interval distribution of axis of disk body 1, the driven bevel gear of integral type that this application provided can pass through other spare part assembly of above-mentioned pilot hole and reduction gear assembly, has guaranteed the axiality and the stability of assembly.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an integral type driven bevel gear, its characterized in that, includes left poor shell, left poor shell includes disk body and transmission shaft, the disk body is circular platelike structure, transmission shaft fixed connection in the middle part of disk body one side, the middle part of transmission shaft runs through along its length direction and is formed with the mounting hole, the outside edge of disk body is formed with tapered tooth along its circumference even interval to as driven bevel gear's meshing tooth.

2. The integrated driven bevel gear according to claim 1, wherein a clutch structure for engaging with a differential lock is formed on an end surface of the transmission shaft remote from the plate body.

3. The integrated driven bevel gear of claim 2 wherein the clutching structure is a plurality of fixed clutching teeth evenly distributed circumferentially about the axis of the drive shaft.

4. The integrated driven bevel gear according to claim 1, wherein an outer side wall of the drive shaft is formed with at least one lightening hole communicating with the mounting hole.

5. The integrated driven bevel gear according to claim 4, wherein the number of the lightening holes is three, and the three lightening holes are evenly distributed around the axis of the transmission shaft.

6. The integrated driven bevel gear according to claim 5, wherein an end of the drive shaft remote from the disc body is formed with an annular step having an outer diameter dimension smaller than that of the drive shaft, and an inner through hole of the annular step is coaxially disposed with the mounting hole and communicates with each other.

7. The integrated driven bevel gear according to claim 4, wherein the inner side wall of the transmission shaft is formed with at least one weight-reducing groove extending in the axial direction of the transmission shaft in the longitudinal direction, one end of the weight-reducing groove is located at the joint of the annular step and the transmission shaft, and the other end of the weight-reducing groove extends to the opening of the mounting hole.

8. The integrated driven bevel gear according to claim 7, wherein the number of the lightening slots is three, and the three lightening slots are provided in one-to-one correspondence with the lightening holes.

9. The integrated driven bevel gear according to claim 1, wherein a circular groove is formed on a side of the disc body facing away from the drive shaft, and the circular groove is coaxially disposed with the mounting hole and communicates with each other.

10. The integrated driven bevel gear according to claim 9 wherein the circular recess has a plurality of fitting holes formed therein through the disc body along the axis thereof, the fitting holes being evenly spaced around the axis of the disc body.