CN219692177U

CN219692177U - Differential case

Info

Publication number: CN219692177U
Application number: CN202321250906.XU
Authority: CN
Inventors: 刘志新; 王志龙
Original assignee: Anhui Heli Co Ltd
Current assignee: Anhui Heli Co Ltd
Priority date: 2023-05-19
Filing date: 2023-05-19
Publication date: 2023-09-15
Anticipated expiration: 2033-05-19

Abstract

The utility model relates to the technical field of differentials and discloses a differential case, which comprises a case, wherein an inner spline is arranged on the inner side wall of one end of the case, an outer spline is arranged on the outer surface of one end of the case far away from the inner spline, through holes are symmetrically formed in the surface of the case in a penetrating way, a limiting shaft is fixed in the case in a sleeved mode between the through holes, a planetary gear is symmetrically and movably sleeved on the surface of the limiting shaft, a half shaft gear is symmetrically and movably arranged in the case and positioned on the two sides of the limiting shaft, and a plurality of oil storage tanks are formed in the inner side wall of the case. The inner cavity of the differential shell is designed to be spherical corresponding to the matching positions of the half shaft gear and the planetary gear, the gear engagement has better centering effect, the adjustment of the engagement clearance by an adjusting pad is not needed, the parts are few, the installation is concise, the assembly efficiency is high, the oil storage tank is designed on the spherical surface of the inner cavity of the differential shell, the oil storage tank is fully lubricated and dissipated, the abrasion fault point of a gasket is reduced, and the quality is reliable.

Description

Differential case

Technical Field

The utility model relates to the technical field of differentials, in particular to a differential case.

Background

The differential mechanism can improve the control comfort of the vehicle, so that the vehicle can stably run, wheel slip caused by unequal left and right wheel strokes due to different road surface conditions, tire pressure, two-wheel loads and the like in the running process of the vehicle is avoided, and the differential mechanism can realize that the two output shafts rotate at different angular speeds.

Common differential arrangements can only achieve the transmission of power and the distribution of rotational speed. In particular, in the hub reduction mechanism, braking is applied to the hub, so that the requirement on braking torque is high and the requirement on a brake is high.

In addition, the bevel gear pair of the differential mechanism needs to have reasonable meshing clearance so that oil films can form to reduce meshing impact noise and abrasion, and abnormal noise can be generated when the clearance is too large, so that the use comfort is reduced; the oil film with too small clearance is difficult to form, and is easy to be blocked and generate faults after thermal expansion in the use process; the common adjustment mode is to design a group of adjustment pads behind the half-shaft gear, and adjust according to the product size chain error. More parts and complicated assembly and adjustment

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model aims to provide the differential case which has high assembly efficiency, fully lubricates and dissipates heat, reduces the abrasion fault points of gaskets and has reliable quality.

The differential mechanism shell comprises a shell, wherein an inner spline is arranged on the inner side wall of one end of the shell, an outer spline is arranged on the outer surface of one end, far away from the inner spline, of the shell, through holes are symmetrically formed in the surface of the shell in a penetrating mode, a limiting shaft is fixed in the shell in a sleeved mode between the through holes, a planetary gear is symmetrically and movably sleeved on the surface of the limiting shaft, a half shaft gear is symmetrically and movably arranged in the shell and positioned on two sides of the limiting shaft, and a plurality of oil storage tanks are formed in the inner side wall of the shell.

Preferably, the inside of casing is offered the circle cavity, first shaft hole and second shaft hole have been seted up to the both ends symmetry of casing, the inside at first shaft hole is seted up to the internal spline, the inside spline housing in first shaft hole is equipped with the input shaft, the inside movable sleeve of input shaft is equipped with first output shaft, just first output shaft and the side gear spline suit that is close to first shaft hole department, the inside movable sleeve in second shaft hole is equipped with the second output shaft, and the second output shaft and the side gear spline suit that is close to second shaft hole department.

Preferably, the through holes are symmetrically formed in two sides of the round cavity, and the oil storage tank is formed in the joint of the first shaft hole, the second shaft hole and the cavity.

Preferably, the first matching spherical surface matched with the planetary gear is symmetrically arranged on the inner side wall of the round cavity, the first matching spherical surface is arranged at the joint of the cavity and the through hole, the second matching spherical surface matched with the half shaft gear is symmetrically arranged on the inner side wall of the round cavity, and the second matching spherical surface is arranged at the joint of the cavity and the first shaft hole and the second shaft hole.

Preferably, antifriction copper pads are arranged between the side gears and the shell, and connecting splines are arranged in the side gears.

Preferably, pin holes for locking the limiting shaft are formed in the outer surface of the shell and located on two sides of the through hole, and mounting holes are formed in the outer surface of the shell and are vertically and symmetrically formed in the through hole.

The beneficial effects of the utility model are as follows:

1. the inner cavity of the differential shell corresponds to the matching positions of the half shaft gear and the planetary gear, is designed to be spherical, gear engagement has better centering effect, an adjusting pad is not needed to adjust the engagement clearance, the parts are few, the installation is concise, and the assembly efficiency is high.

2. The spherical surface of the inner cavity of the differential mechanism shell is provided with an oil storage tank, so that the oil storage tank is fully lubricated and cooled, the abrasion fault point of a gasket is reduced, and the quality is reliable.

Drawings

Fig. 1 is a first perspective cross-sectional view of a differential carrier provided by the present utility model.

Fig. 2 is a second perspective cross-sectional view of the differential carrier provided by the present utility model.

Fig. 3 is a schematic view of the overall structure of the differential case according to the present utility model.

Fig. 4 is a schematic view of the overall structure of the differential case according to the present utility model.

In the figure: 1. an internal spline; 2. an external spline; 3. a first mating sphere; 31. an oil storage tank; 4. a second mating sphere; 5. a through hole; 6. antifriction copper pads; 7. a side gear; 71. a connecting spline; 8. a planetary gear; 9. limiting the shaft; 10. a housing; 100. an input shaft; 200. a first output shaft; 300. and a second output shaft.

Detailed Description

Referring to fig. 1-4, the differential case comprises a case 10, an inner spline 1 is provided on the inner side wall of one end of the case 10, an outer spline 2 is provided on the outer surface of one end of the case 10 far away from the inner spline 1, through holes 5 are symmetrically provided on the surface of the case 10, a limiting shaft 9 is fixed between the through holes in the case 10, a planetary gear 8 is symmetrically and movably sleeved on the surface of the limiting shaft 9, a side gear 7 is symmetrically and movably arranged on the inner side of the case 10 and positioned on two sides of the limiting shaft 9, a plurality of oil storage grooves 31 are provided on the inner side wall of the case 10, the inner cavity of the differential case is designed to be a sphere corresponding to the matching position of the side gear 7 and the planetary gear 8, the friction reducing copper pads 6 are matched for use, gear engagement can be self-adaptively centered, engagement gaps are reasonable, the adjustment of the engagement gaps are not needed, abrasion of the case 10 is reduced, the case 10 is worn down, the service life of parts is shortened due to the fact that the case 10 on the back of the gear can generate great friction moment and generate heat, if lubrication and heat dissipation are not timely accelerated, the service life of the parts is shortened, therefore, the sphere surface of the differential case is designed with the oil storage grooves 31, and the sphere of the range of the oil storage grooves 31 is at least covered to each sphere. Can satisfy the inside fluid business turn over of transaxle constantly, realize heat dissipation and lubrication.

The inside of casing 10 is offered the circle cavity, and first shaft hole and second shaft hole have been offered to the both ends symmetry of casing 10, and the inside in first shaft hole is offered to internal spline 1, and the inside spline housing in first shaft hole is equipped with input shaft 100, and the inside movable sleeve of input shaft 100 is equipped with first output shaft 200, and first output shaft 200 and the side gear 7 spline housing that is close to first shaft hole department, and the inside movable sleeve in second shaft hole is equipped with second output shaft 300, and second output shaft 300 and the side gear 7 spline housing that is close to second shaft hole department.

The oil storage grooves 31 are formed in the connection positions of the first shaft hole, the second shaft hole and the cavity, large friction resistance distances are arranged at the contact positions of the side gear 7 and the antifriction copper pad 6, the antifriction copper pad 6 is arranged to reduce abrasion of the shell 10, the oil storage grooves 31 are arranged to ensure that oil is always stored, an oil film is always present, the oil film cannot be formed after being extruded under load, abrasion failure points of gaskets are reduced, and product quality is improved.

The inside wall symmetry of round cavity has offered with planetary gear 8 complex first cooperation sphere 3, and first cooperation sphere 3 is offered in cavity and through hole 5 junction, and the inside wall symmetry of round cavity has offered with the second cooperation sphere 4 of side gear 7 complex, and second cooperation sphere 4 is offered in cavity and first shaft hole, second shaft hole junction.

An antifriction copper pad 6 is arranged between the side gear 7 and the shell 10, and a connecting spline 71 is arranged in the side gear 7.

The outer surface of the shell 10 and two sides of the through hole 5 are provided with pin holes for locking the limiting shaft 9, and the outer surface of the shell 10 and the through hole 5 are provided with mounting holes in vertical symmetry.

When the device is used, the power source is matched with the internal spline 1 of the differential mechanism shell from the input shaft 100, the differential mechanism receives power, the left half shaft and the right half shaft are in spline fit with the half shaft gear 7 to output power, the external spline 2 of the differential mechanism shell is connected with a braking mechanism, when a vehicle runs, a baffle plate in the braking mechanism and the differential mechanism shell synchronously rotate, when braking is implemented, the braking mechanism acts (such as a piston compresses a friction plate and the baffle plate), friction resistance is generated, the baffle plate is gradually stopped rotating to drive the differential mechanism shell to stop rotating, and finally the termination of power transmission is realized.

Claims

1. Differential mechanism shell, its characterized in that: the novel oil storage tank comprises a shell, wherein an inner spline is arranged on the inner side wall of one end of the shell, an outer spline is arranged on the outer surface of one end of the shell, which is far away from the inner spline, a through hole is symmetrically arranged on the surface of the shell, a limiting shaft is fixed between the through holes in the shell and sleeved with the inner side of the shell, a planetary gear is movably sleeved on the surface of the limiting shaft, a half shaft gear is movably arranged in the inner side of the shell and positioned on the two sides of the limiting shaft, and a plurality of oil storage tanks are arranged on the inner side wall of the shell.

2. The differential carrier as defined in claim 1, wherein: the utility model discloses a motor, including casing, input shaft, second shaft hole, first shaft hole and second shaft hole, the inside of casing is seted up to the inside of casing, first shaft hole and second shaft hole have been seted up to the both ends symmetry of casing, the inside spline cover in first shaft hole is equipped with the input shaft, the inside movable sleeve of input shaft is equipped with first output shaft, just first output shaft and the side gear spline suit that is close to first shaft hole department, the inside movable sleeve in second shaft hole is equipped with the second output shaft, and the second output shaft and the side gear spline suit that is close to second shaft hole department.

3. The differential carrier as defined in claim 2, wherein: the oil storage tank is arranged at the joint of the first shaft hole, the second shaft hole and the cavity.

4. The differential carrier as defined in claim 2, wherein: the inner side wall symmetry of round cavity has seted up with planetary gear complex first cooperation sphere, first cooperation sphere is seted up in cavity and passing hole junction, the inner side wall symmetry of round cavity has seted up with semi-axis gear complex second cooperation sphere, the second cooperation sphere is seted up in cavity and first shaft hole, second shaft hole junction.

5. The differential carrier as defined in claim 1, wherein: antifriction copper pads are arranged between the half-shaft gears and the shell in a cushioning mode, and connecting splines are arranged in the half-shaft gears.

6. The differential carrier as defined in claim 1, wherein: the outer surface of casing just is located the through hole both sides and has all been seted up the pinhole that is used for locking the restriction axle, the mounting hole has been seted up to the surface of casing and with the perpendicular symmetry of through hole.