Gear differential mechanism

Abstract

The utility model provides a gear differential mechanism, and belongs to the technical field of differential mechanisms. The differential mechanism solves the problems that in the prior art, a differential mechanism is inconvenient to assemble and high in precision requirement. The differential mechanism comprises a gear cavity, a differential mechanism shell and a differential mechanism assembly, the differential mechanism assembly comprises a driving gear, a driven gear disc, a planetary gear, a left half axle gear and a right half axle gear, a driving shaft is fixedly connected to the driving gear, the driving shaft is located in the gear cavity, and the planetary gear is fixedly installed in a connecting hole. The left half axle gear and the right half axle gear are connected with the two ends of the differential mechanism shell respectively, and the left half axle gear and the right half axle gear are meshed with the planetary gear. The utility model has the advantages of simple assembly, compact structure and stable connection.

Description

Technical Field

[0001] The utility model belongs to the technical field of differentials and relates to a gear differential. Background Art

[0002] When an automobile turns, the wheels rotate at different speeds. When turning, the distances traveled by each wheel are not equal, that is, the distance traveled by the inner wheel is shorter than that of the outer wheel, and the differential is a device for adjusting the rotational speed difference between the left and right wheels.

[0003] Chinese Patent with the publication number CN205780696U discloses a planetary gear differential, which includes a differential case, a left housing, a right housing, planetary gears, half-axle gears and a combined cross shaft. The middle part of the right housing is an inner cavity, and the left housing and the right housing are matched to enclose the inner cavity. The planetary gears are sleeved on the combined cross shaft and installed in the inner cavity together with the half-axle gears. Half-axle gear holes are respectively arranged at both ends of the left housing and the right housing, and the half-axle gears are inserted through the half-axle gear holes. Four planetary gear holes are arranged on the right housing, and the four planetary gears are respectively sleeved on two perpendicularly intersecting shafts of the cross shaft, and the other end of the cross shaft passes through the planetary gear holes.

[0004] In the planetary gear differential provided by this patent, the cross shaft adopts an interference fit structural mode, which is inconvenient for assembly and has high precision requirements. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a gear differential for the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A gear differential includes a gear cavity, a differential housing and a differential assembly. The differential assembly includes a driving gear, a driven gear disc, planetary gears, a left half-axle gear and a right half-axle gear. A driving shaft is fixedly connected to the driving gear, and the driving shaft is located inside the gear cavity. Bearing bases are formed on both sides of the gear cavity, and fixed bearings are fixedly installed in the bearing bases. The left half-axle gear and the right half-axle gear are respectively connected with a left half-output shaft and a right half-output shaft, and the left half-output shaft and the right half-output shaft pass through the fixed bearings. One end of the differential housing is connected to one side of the fixed bearing and the other end of the differential housing is fixedly connected to the driven gear disc. One side of the driven gear disc is connected to the other fixed bearing. A connection hole is formed in the differential housing, and an electromagnetic lock is fixed outside the connection hole. The planetary gears are fixedly installed in the connection hole. The left half-axle gear and the right half-axle gear are respectively connected to both ends of the differential housing, and the left half-axle gear and the right half-axle gear mesh with the planetary gears.

[0007] In the above-mentioned gear differential, a bearing cover is fixedly installed on the bearing base.

[0008] In the above-mentioned gear differential, threaded grooves are provided inside the outer sides of the bearing base and the bearing cover body, and torque sensors are fixedly installed in the threaded grooves.

[0009] In the above-mentioned gear differential, a wide-edge groove is provided inside the gear cavity, and the driven gear disc is located in the wide-edge groove.

[0010] In the above-mentioned gear differential, a number of reinforcing ribs are provided on the outer side of the driven gear disc, and the reinforcing ribs are arranged in a circumferential pattern.

[0011] Compared with the prior art, a gear differential provided by the present utility model has the following beneficial effects: 1. Through the structural settings of the differential housing, the differential assembly, the left half output shaft and the right half output shaft, the planetary gear is firmly connected to the differential housing through an electromagnetic lock, and the left and right half shaft gears are installed inside the differential housing. This structural setting is relatively compact and has a small volume; 2. By providing a bearing base and a bearing cover body on both sides of the gear cavity and providing fixed bearings inside the bearing base and the bearing cover body, the left half output shaft and the right half output shaft are fixed by the fixed bearings on both sides. This connection structure is stable and the assembly is simple. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is an exploded schematic diagram of the present utility model;

[0014] Figure 3 is a schematic diagram of the structure of the present utility model from another angle.

[0015] In the figure: 1. Gear cavity; 11. Wide-edge groove; 2. Differential housing; 21. Connection hole; 3. Differential assembly; 31. Driving gear; 32. Driven gear disc; 321. Reinforcing rib; 33. Planetary gear; 34. Left half shaft gear; 35. Right half shaft gear; 4. Driving shaft; 5. Bearing base; 51. Bearing cover body; 52. Threaded groove; 53. Fastening bolt; 6. Left half output shaft; 7. Right half output shaft; 8. Electromagnetic lock; 9. Torque sensor; 10. Fixed bearing. Detailed Embodiments

[0016] The following are specific embodiments of the present utility model in combination with the drawings. The technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0017] Such as Figures 1 to 3As shown in the figure, this embodiment includes a gear cavity 1, a differential housing 2, and a differential assembly 3. The gear cavity 1 is in a T shape. The driving gear 31 is connected to the driving shaft 4. The driving shaft 4 is vertically installed inside the gear cavity 1. Two bearing bases 5 are integrally formed on both sides of the gear cavity 1. A bearing cover 51 is fixedly installed above the bearing base 5. The bearing base 5 and the bearing cover 51 are fixed by bolts. The inside of the bearing base 5 and the bearing cover 51 is circular, and a fixed bearing 10 is fixedly installed inside the bearing base 5 and the bearing cover 51. A left half output shaft 6 and a right half output shaft 7 are respectively connected to the left half axle gear 34 and the right half axle gear 35. The left half output shaft 6 and the right half output shaft 7 pass through the fixed bearing 10.

[0018] As Figures 1 to 3 shown, the differential assembly 3 includes a driving gear 31, a driven gear disk 32, a planetary gear 33, a left half axle gear 34, and a right half axle gear 35. One end of the differential housing 2 is connected to the fixed bearing 10 on one side, and the other end of the differential housing 2 is fixedly connected to the driven gear disk 32. One side of the driven gear disk 32 is connected to the fixed bearing 10 on the other side. Two connecting holes 21 are provided on the differential housing 2. An electromagnetic lock 8 is fixed outside the connecting hole 21. One end of the planetary gear 33 is connected to the connecting hole 21 and fixed to the connecting hole 21 through the electromagnetic lock 8. Both ends of the differential housing 2 are through-hole circular tubes. The left half axle gear 34 and the right half axle gear 35 are installed inside the differential housing 2 and are respectively connected to the left and right ends of the differential housing 2. The left half axle gear 34 and the right half axle gear 35 are meshed with the planetary gear 33. A number of reinforcing ribs 321 are provided on the outside of the driven gear disk 32. The reinforcing ribs 321 are arranged in a circular shape, and the reinforcing ribs 321 enhance the structural strength of the driven gear disk 32.

[0019] Further details are as follows. As Figures 1 to 3 shown, threaded grooves 52 are provided on the inner surfaces of the bearing base 5 and the bearing cover 51 near the outside. The outer surface of the torque sensor 9 is also threaded. The torque sensor 9 is installed in the threaded groove 52 and fixedly connected to the bearing base 5 and the bearing cover 51.

[0020] Further details are as follows. As Figures 1 to 3 shown, a wide-edge groove 11 is provided inside the gear cavity 1. The driven gear disk 32 is located in the wide-edge groove 11.

[0021] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0022] Although various terms are used more frequently in this text, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present utility model; any interpretation of them as an additional limitation is contrary to the spirit of the present utility model.

Claims

1. A gear differential, comprising a gear cavity (1), a differential housing (2) and a differential assembly (3), characterized in that: The differential assembly (3) comprises a driving gear (31), a driven gear plate (32), a planetary gear (33), a left half-shaft gear (34) and a right half-shaft gear (35); the driving gear (31) is fixedly connected to a driving shaft (4); the driving shaft (4) is located inside a gear cavity (1); bearing bases (5) are formed on both sides of the gear cavity (1); a fixed bearing (10) is fixedly installed in the bearing base (5); the left half-shaft gear (34) and the right half-shaft gear (35) are respectively connected to a left half-output shaft (6) and a right half-output shaft (7); the left half-output shaft (6) and the right half-output shaft (7) are passed through the fixed bearing (10) ), one end of the differential housing (2) is connected to a fixed bearing (10) on one side and the other end of the differential housing (2) is fixedly connected to a driven gear plate (32), one side of the driven gear plate (32) is connected to the fixed bearing (10) on the other side, a connecting hole (21) is provided on the differential housing (2), an electromagnetic lock (8) is fixed to the outside of the connecting hole (21), the planetary gear (33) is fixedly installed in the connecting hole (21), the left half-shaft gear (34) and the right half-shaft gear (35) are respectively connected to the two ends of the differential housing (2), and the left half-shaft gear (34) and the right half-shaft gear (35) are meshed with the planetary gear (33).

2. A gear differential according to claim 1, characterized in that: A bearing cover body (51) is fixedly mounted on the bearing base (5).

3. A gear differential according to claim 2, characterized in that: The outer sides of the bearing base (5) and the bearing cover body (51) are provided with thread grooves (52), and a torque sensor (9) is fixedly installed in the thread grooves (52).

4. The gear differential according to claim 1, characterized in that: A wide-side groove (11) is provided inside the gear cavity (1), and the driven gear plate (32) is located in the wide-side groove (11).

5. The gear differential according to claim 1, characterized in that: A plurality of reinforcing ribs (321) are arranged on the outer side of the driven gear plate (32), and the reinforcing ribs (321) are arranged in a circular shape.

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