CN214534342U

CN214534342U - Mechanical limited slip differential for automobile

Info

Publication number: CN214534342U
Application number: CN202120704116.9U
Authority: CN
Inventors: 金传明
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-10-29
Anticipated expiration: 2031-04-07

Abstract

The utility model relates to an automotive machinery formula limited slip differential, include the casing and the differential side gear of setting in the casing with transmission shaft connection, planetary gear, the planet axle of two at least intercrossing settings, the epaxial planet gear who sets up at least one and two differential side gear interlocks of planet, but be provided with wobbling lever in the casing, the lever expansion end is connected and drives this planet axle another planet axle rotation relatively with a planet axle transmission, the turning moment of casing passes through the lever, the occlusal surface between planet axle transmission to planetary gear and the differential side gear is in order to convert the resistance of restriction planetary gear rotation. The utility model discloses rational in infrastructure, practicality are strong, transmit the moment of rotation of casing to the occlusal surface between planetary gear and the half axle gear through lever, planet axle, increase the occlusal force between planetary gear and the half axle gear to form the resistance of restriction planetary gear rotation, make all power of automobile transmission shaft can not all carry on the wheel of skidding, play the limited slip effect.

Description

Mechanical limited slip differential for automobile

Technical Field

The utility model relates to an automotive differential technical field, in particular to automotive mechanical type limited slip differential.

Background

At present, automobiles are widely used in daily life, the automobiles can be popularized without opening a differential mechanism, the problem that the rotating speeds of wheels on two sides are inconsistent when the automobiles turn is solved, the differential mechanism commonly used for the automobiles is a bevel gear differential mechanism, and the differential mechanism adopts a planetary gear mechanism to realize the differential speed of a left half shaft and a right half shaft. When the automobile runs into a road with poor adhesion conditions or the wheels on one side do not exert force, the differential does not play a role in differential to realize antiskid, so that the trafficability of the automobile is improved, and therefore, the differential such as the Torsen differential, the friction plate type antiskid differential and the like and some differential locks appear, and the differential locks usually need to be stopped to be operated, so that the operation is not easy and is inconvenient. The Torsen differential mechanism has a complex structure and high manufacturing cost, and the friction plate of the friction plate type anti-skid differential mechanism needs to be replaced after being worn out, which is troublesome. Therefore, there is a need for a new type of mechanical limited slip differential for automobiles.

SUMMERY OF THE UTILITY MODEL

In order to solve the deficiency of the prior art, the utility model provides a car mechanical type limited slip differential, its resistance that converts the rotation moment of differential casing into the restriction planetary gear rotation through lever and planet axle to play the effect of limited slip.

In order to achieve the above purpose, the utility model provides a technical scheme does: a mechanical limited slip differential of an automobile comprises a shell connected with a transmission shaft, a half axle gear, a planetary gear and at least two planetary shafts, wherein the half axle gear, the planetary gear and the at least two planetary shafts are arranged in the shell in a crossed mode, at least one planetary gear meshed with the two half axle gears is arranged on each planetary shaft, a lever capable of swinging is arranged in the shell, the movable end of the lever is in transmission connection with one planetary shaft and drives the planetary shaft to rotate relative to the other planetary shaft, and the rotating torque of the shell is transmitted to an meshed surface between the planetary gear and the half axle gear through the lever and the planetary shafts to be converted into resistance for limiting the rotation of the planetary gear.

In the above technical scheme, the inner wall of the housing is provided with an installation groove, the lever is provided with a shaft part embedded in the installation groove, the shaft part is used as the rotating axis of the lever, and the shaft part is provided with a cylindrical surface matched with the installation groove.

In the above technical scheme, the trend of the mounting groove is parallel to the axial direction of the shell.

In the above technical solution, the mounting groove has an opening that limits a rotation angle of the lever.

In the technical scheme, the two ends of each planet shaft of the two planet shafts are respectively provided with the movable block, the peripheral surface of each movable block is in sliding contact with the inner wall of the shell, a gap is formed between every two adjacent movable blocks, and the movable end of the lever is arranged in one gap.

In the technical scheme, the two levers are symmetrically arranged in the shell and are respectively arranged in two opposite gaps.

In the above technical solution, one planet shaft has a through hole for the other planet shaft to pass through, and the through hole is in clearance fit with the other planet shaft.

In the above technical solution, the planetary gear is a bevel gear.

In the technical scheme, two axial ends of the shell are respectively fixed with a cover plate through bolts, and a half shaft of the automobile penetrates through a cover plate shaft center hole and is connected with a half shaft gear.

The utility model has the advantages that the rotation torque of the shell is transmitted to the occlusal surface between the planetary gear and the half axle gear through the lever and the planetary shaft so as to be converted into the resistance for limiting the rotation of the planetary gear; the meshing force between the planetary gear and the half axle gear is increased, so that resistance for limiting the rotation of the planetary gear is formed, all power of an automobile transmission shaft can not be completely transmitted to a slipping wheel, and the slip limiting effect is achieved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is an exploded view of the first embodiment.

Fig. 3 is a schematic internal perspective structure diagram of the first embodiment.

Fig. 4 is a schematic plan view of the planetary gear and the housing in the first embodiment (the housing is not rotated).

Fig. 5 is a schematic plan view of the planetary gear and the housing in the first embodiment (the housing rotated state).

Fig. 6 is a schematic plan view of the planetary gear and the housing of the second embodiment.

In the figure: 1. a housing; 11. a step; 12. mounting grooves; 13. an opening; 2. a cover plate; 3. a half shaft gear; 21. a bolt; 22. a shaft center hole; 41. a first planet shaft; 42. a second planet shaft; 43. a through hole; 51. a first planetary gear; 52. a second planetary gear; 53. a third planetary gear; 54. a fourth planetary gear; 61. a first movable block; 62. a second movable block; 63. a third movable block; 64. a fourth movable block; 71. a first lever; 72. a second lever; 73. a shaft portion; 74. a movable end; 81. a first gap; 82. a second gap; 83. a third gap; 84. a fourth gap.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings.

In the first embodiment, the first step is,

the present embodiment is a preferred embodiment, as shown in fig. 1-5, a mechanical limited slip differential for an automobile, comprising a housing 1 connected with a transmission shaft, and a side gear 3, a planetary gear, two planetary shafts arranged in the housing 1 and crossing each other, wherein at least one planetary gear meshed with the two side gears 3 is arranged on the planetary shaft, a swingable lever (71, 72) is arranged in the housing 1, a movable end 74 of the lever is in transmission connection with one planetary shaft and drives the planetary shaft to rotate relative to the other planetary shaft, and the rotation torque of the housing 1 is transmitted to the meshed surface between the planetary gear and the side gear 3 through the lever and the planetary shaft to be converted into the resistance for limiting the rotation of the planetary gear.

The inner wall of the housing 1 is provided with an installation groove 12, the levers (71, 72) are provided with a shaft part 73 embedded in the installation groove 12, the shaft part 73 is used as the axle center of the lever rotation, and the shaft part 73 is provided with a cylindrical surface matched with the installation groove 12.

The mounting groove 12 runs parallel to the axial direction of the housing 1. The mounting groove 12 has an opening 13 that limits the rotation angle of the lever. The levers (71, 72) are inserted into the mounting grooves 12 in the axial direction of the housing such that the levers (71, 72) are restricted from rotating within the mounting grooves only by a certain angle about the shaft portion 73.

Two ends of each planet shaft of the two planet shafts are provided with movable blocks, the peripheral surfaces of the movable blocks are in sliding contact with the inner wall of the shell 1, a gap is arranged between every two adjacent movable blocks, and the movable end 74 of the lever is arranged in one gap.

Two levers are symmetrically arranged in the shell 1 and are respectively arranged in two opposite gaps.

One planet shaft has a through hole 43 for the other planet shaft to pass through, the through hole 43 being in clearance fit with the other planet shaft.

The planetary gears are bevel gears. Two axial ends of the shell 1 are respectively fixed with a cover plate 2 through bolts 21, and a half shaft of an automobile passes through a shaft hole 22 of the cover plate 2 and is connected with the half shaft gear 3.

As shown in fig. 4, the two planetary shafts are a first planetary shaft 41 and a second planetary shaft 42, the four movable blocks in the housing 1 are a first movable block 61, a second movable block 62, a third movable block 63, and a fourth movable block 64 in the clockwise direction, the four planetary gears are a first planetary gear 51, a second planetary gear 52, a third planetary gear 53, and a fourth planetary gear 54 in the clockwise direction, the first movable block 61, the first planetary gear 51, the third planetary gear 53, and the third movable block 63 are sequentially disposed on the first planetary shaft 41, and the second movable block 62, the second planetary gear 52, the fourth planetary gear 54, and the fourth movable block 64 are sequentially disposed on the second planetary shaft 42. A first gap 81 is provided between the first movable block 61 and the second movable block 62, a second gap 82 is provided between the second movable block 62 and the third movable block 63, a third gap 83 is provided between the third movable block 63 and the fourth movable block 64, and a fourth gap 84 is provided between the fourth movable block 64 and the first movable block 61. The first planetary shaft 41 has a through hole 43 through which the second planetary shaft 42 passes.

The two levers are a first lever 71 and a second lever 72, respectively, the first lever 71 being disposed in the first gap 81, and the second lever 72 being disposed in the third gap 83. The second gap 82 and the fourth gap 84 are clearance gaps.

As shown in fig. 3-5, a gear plate is mounted on the step 11 on the outer wall of the casing 1, and the transmission shaft of the vehicle is in transmission connection with the gear plate, so as to drive the differential casing 1 to rotate around the axis (also the axis of the half axle), when the casing 1 rotates, the planetary gears are connected with the half axle gears 3, so that under the action of inertia, the casing 1 rotating suddenly will break the first and second levers, so that the first and second levers swing in the direction opposite to the rotation direction of the casing 1, at this time, the first lever 71 will prop apart the adjacent first and second movable blocks 62, the second lever 72 will prop apart the adjacent third and fourth movable blocks 64, the first movable block 61 and the third movable block 63 drive the first planetary shaft 41 to rotate a certain angle, the second movable block 62 and the fourth movable block 64 drive the second planetary shaft 42 to rotate a certain angle, and drive the first planetary gear 51 and the fourth planetary gear 54 to move in the direction of the fourth gap 84, the second planet gears 52 and the third planet gears 53 move towards the second gap 82, so that a pair of clamping forces with opposite directions are generated between the first planet gears 51 and the fourth planet gears 54, the pair of clamping forces clamp the two side gears 3 at two sides, so that the meshing force between the first planet gears 51 and the fourth planet gears 54 and the side gears 3 is increased, and the resistance for limiting the autorotation of the planet gears is further formed; the other pair of clamping forces with opposite directions are generated between the second planet gear 52 and the third planet gear 53, and are also transmitted to the occlusal surface between the corresponding planet gear and the half shaft gear 3, so that resistance for limiting the rotation of the planet gear is formed, and the two pairs of clamping forces can greatly increase the resistance between the planet gear set and the half shaft gear 3.

In the second embodiment, the first embodiment of the method,

as shown in fig. 6, a modification is made on the basis of the first embodiment, except that the two planetary shafts are a first planetary shaft 41 and a second planetary shaft 42, and only one planetary gear meshing with the two side gears 3 is provided on each planetary shaft, i.e., only the first planetary gear 51 is provided on the first planetary shaft 41, and only the fourth planetary gear 54 is provided on the second planetary shaft 42. The four movable blocks in the housing 1 are a first movable block 61, a second movable block 62, a third movable block 63 and a fourth movable block 64 along the clockwise direction, the first movable block 61, the first planetary gear 51 and the third movable block 63 are sequentially arranged on the first planetary shaft 41, and the second movable block 62, the fourth planetary gear 54 and the fourth movable block 64 are sequentially arranged on the second planetary shaft 42. A first gap 81 is provided between the first movable block 61 and the second movable block 62, a second gap 82 is provided between the second movable block 62 and the third movable block 63, a third gap 83 is provided between the third movable block 63 and the fourth movable block 64, and a fourth gap 84 is provided between the fourth movable block 64 and the first movable block 61. The rotational torque of the housing 1 is transmitted to the meshing surface of the first planetary gear 51 and the side gear 3 and the meshing surface of the fourth planetary gear 54 and the side gear 3 through the lever and the planetary shaft, so that a pair of clamping forces are generated between the first planetary gear 51 and the fourth planetary gear 54, the clamping forces are opposite in direction, the clamping forces clamp the two side gears 3 on both sides, the meshing force between the first planetary gear 51 and the fourth planetary gear 54 and the side gear 3 is increased, and resistance force for limiting the planetary gears to rotate is generated.

When the automobile runs straight, the planetary gear only winds the axle center of the half axle to revolve, when the automobile turns or slips, the planetary gear can rotate, and the rotating shell 1 prizes the planetary shaft through a lever, so that the engaging force of the planetary gear and the half axle gear 3 in the radial direction of the shell 1 is increased, and the rotation of the planetary gear is limited.

The utility model has reasonable structure, novel design and strong practicability, and transmits the rotation torque of the shell 1 to the occlusal surface between the planetary gear and the half axle gear 3 through the lever and the planetary shaft so as to convert the rotation torque into the resistance for limiting the rotation of the planetary gear; the meshing force between the planetary gear and the half axle gear 3 is increased, so that resistance for limiting the rotation of the planetary gear is formed, all power of an automobile transmission shaft can not be completely transmitted to a slipping wheel, and the slip limiting effect is achieved.

The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications to the above embodiments are all within the scope of the present invention.

Claims

1. The mechanical limited slip differential of the car, characterized by, including the body connected with drive shaft and setting up the half axle gear, planetary gear, at least two planetary axles set up crosswise each other in the body, set up at least one planetary gear occluded with two half axle gears on the planetary axle, there is a swingable lever in the body, the loose end of the said lever is connected with a planetary axle transmission and drives the planetary axle to rotate relative to another planetary axle, the rotational torque of the said body transmits to the occlusal surface between half axle gear and the planetary gear in order to change into the resistance to limit planetary gear autorotation through lever, planetary axle.

2. The automotive mechanical limited slip differential of claim 1, wherein the inner wall of the housing is provided with a mounting groove, the lever has a shaft portion fitted in the mounting groove, the shaft portion serves as a center of rotation of the lever, and the shaft portion has a cylindrical surface matching the mounting groove.

3. The automotive mechanical limited slip differential of claim 2, wherein the mounting grooves run parallel to the axial direction of the housing.

4. The automotive mechanical limited slip differential of claim 3, wherein the mounting slot has an opening that limits the degree of rotation of the lever.

5. The automotive mechanical limited slip differential according to claim 2, wherein two ends of each of the two planetary shafts are provided with a movable block, the outer peripheral surfaces of the movable blocks are in sliding contact with the inner wall of the housing, a gap is formed between two adjacent movable blocks, and the movable end of the lever is arranged in one of the gaps.

6. The automotive mechanical limited slip differential of claim 5, wherein two levers are symmetrically disposed within the housing and are disposed in two opposing gaps, respectively.

7. The automotive mechanical limited slip differential of claim 1, wherein one planet axle has a through hole for the other planet axle to pass through, the through hole being in clearance fit with the other planet axle.

8. The automotive mechanical limited slip differential of claim 1, wherein the planetary gears are bevel gears.

9. The automotive mechanical limited slip differential of claim 1, wherein a cover plate is fixed to each axial end of the housing by bolts, and the axle shaft of the automobile passes through the axle hole of the cover plate and is connected with the side gear.