CN220286342U - Automobile and limited slip differential - Google Patents
Automobile and limited slip differential Download PDFInfo
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- CN220286342U CN220286342U CN202321861103.8U CN202321861103U CN220286342U CN 220286342 U CN220286342 U CN 220286342U CN 202321861103 U CN202321861103 U CN 202321861103U CN 220286342 U CN220286342 U CN 220286342U
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Abstract
The utility model discloses a limited slip differential, which comprises a shell, a left end gear set and a right end gear set which are arranged in the shell, wherein input power is transmitted to the shell, a left planetary gear and a right planetary gear revolve around the axis of the shell together with the shell, the left planetary gear and the right planetary gear can drive a left half shaft gear and a right half shaft gear meshed with the left planetary gear and the right planetary gear to rotate together with the shell, and the power is transmitted to a wheel half shaft through the left half shaft gear and the right half shaft gear. According to the utility model, the pre-tightening element is arranged between the left half-shaft gear and the right half-shaft gear, and can apply axial pre-tightening force to the left half-shaft gear and the right half-shaft gear simultaneously, so that the left half-shaft gear and the right half-shaft gear are compressed, friction force in the differential is increased, and when one side wheel thoroughly loses adhesion, the shell can still transmit partial torque to the side wheel through the pre-tightening element, so that the wheel slip is prevented. The utility model also provides an automobile comprising the limited slip differential.
Description
Technical Field
The utility model relates to the technical field of automobiles and parts thereof, in particular to an automobile and a limited slip differential.
Background
The automobile differential can realize a mechanism for rotating left and right (or front and rear) driving wheels at different rotation speeds. Mainly comprises a left half shaft gear, a right half shaft gear, two planetary gears and a gear rack. The function is to make the left and right wheels roll at different speeds when the automobile turns or runs on uneven road, i.e. to ensure the pure rolling motion of the driving wheels at both sides. The common differential consists of parts such as a planetary gear, a planetary carrier (differential case), a half shaft gear and the like. The power of the engine enters the differential mechanism through the transmission shaft to directly drive the planetary wheel carrier, and then the planetary wheel drives the left half shaft and the right half shaft to respectively drive the left wheel and the right wheel.
Although the differential mechanism can enable the automobile to normally work when turning, when meeting complex road conditions, such as meeting muddy or snowy road surfaces, the phenomenon of skidding still easily occurs at the side with small adhesion force of the automobile wheels, the normal running of the automobile is affected, and the running safety coefficient of the automobile is reduced.
Therefore, how to change the current situation that the automobile is easy to slip when meeting complex road conditions in the prior art becomes a problem to be solved urgently by the technicians in the field.
Disclosure of Invention
The utility model aims to provide an automobile and a limited slip differential, which are used for solving the problems in the prior art, relieving the wheel slip phenomenon and improving the running performance of the automobile.
In order to achieve the above object, the present utility model provides the following solutions: the utility model provides a limited slip differential, comprising a shell and a differential arranged in the shell:
the left end gear set comprises a left half shaft gear and a left planetary gear, the left half shaft gear and the left planetary gear are rotatably arranged in the shell, the left half shaft gear and the shell are coaxially arranged, the left planetary gear is arranged around the axis of the left half shaft gear, and the left half shaft gear is meshed with the left planetary gear;
the right end gear set comprises a right half shaft gear and a right planetary gear, the right half shaft gear and the right planetary gear are rotatably arranged in the shell, the right half shaft gear and the shell are coaxially arranged, the right planetary gear is arranged around the axis of the right half shaft gear, and the right half shaft gear is meshed with the right planetary gear;
the right planetary gear is meshed with the left planetary gear and corresponds to the left planetary gear one by one; the left half shaft gear and the right half shaft gear are arranged along the axial direction of the shell, a pre-tightening element is arranged between the left half shaft gear and the right half shaft gear, the pre-tightening element simultaneously applies axial pre-tightening force to the left half shaft gear and the right half shaft gear, and the pre-tightening element always rotates synchronously with the shell; the left side gear and the right side gear can be in driving connection with the wheels.
Preferably, the pretensioning element comprises a thrust pad and an elastic member, the ends of the left side gear and the right side gear are respectively provided with the thrust pads, the elastic member is located between the two thrust pads, and the elastic member is in a compressed state.
Preferably, the elastic pieces are disc springs, and the elastic pieces are in one-to-one correspondence with the thrust pads.
Preferably, a cylindrical pin is arranged between the shell and the thrust pad, and the cylindrical pin can limit the relative position of the thrust pad and the shell.
Preferably, the number of the left planetary gears and the number of the right planetary gears are four, the left planetary gears are circumferentially and uniformly distributed around the axis of the left side gear, and the right planetary gears are circumferentially and uniformly distributed around the axis of the right side gear.
Preferably, the housing has mounting holes adapted to the left and right planetary gears.
Preferably, the limited slip differential further comprises a left end cover and a right end cover, wherein the left end cover and the right end cover are respectively arranged on the left side and the right side of the shell, and the left end cover and the right end cover are respectively detachably connected with the shell.
Preferably, the left end cover and the right end cover are detachably connected with the shell by connecting bolts; the number of the connecting bolts is multiple, and the bolts are uniformly distributed around the axis of the shell in the circumferential direction.
The helical angles of the left half shaft gear, the left planetary gear, the right half shaft gear and the right planetary gear range from 30 degrees to 40 degrees;
the left side gear and the right side gear each have involute splines that are adaptable to the wheel axle shafts.
The utility model also provides an automobile comprising the limited slip differential.
Compared with the prior art, the utility model has the following technical effects:
when the limited slip differential disclosed by the utility model works, the input power of an automobile axle is transmitted to the shell through the driven gear of the main speed reducer, the shell rotates along with the driven gear, the left planetary gear and the right planetary gear which are arranged in the shell revolve along with the shell around the axis of the shell, the revolution of the left planetary gear and the right planetary gear can drive the left half-axle gear and the right half-axle gear meshed with the left planetary gear and the right planetary gear to rotate along with the shell, and the power is transmitted to the wheel half-axle through the left half-axle gear and the right half-axle gear, so that the wheels are driven to advance or retreat. It is further emphasized that the pre-tightening element is arranged between the left half-shaft gear and the right half-shaft gear, the pre-tightening element can apply axial pre-tightening force to the left half-shaft gear and the right half-shaft gear simultaneously, the left half-shaft gear and the right half-shaft gear are compressed, friction force in the differential is increased, and when one side wheel thoroughly loses adhesion, the shell can still transmit partial torque to the side wheel through the pre-tightening element, so that the wheel slipping is prevented from being trapped.
The utility model also provides an automobile, which comprises the limited slip differential, and the limited slip differential is used for preventing the wheels from slipping and trapping, so that the running performance of the automobile is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of an isometric view of a limited slip differential according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a limited slip differential according to an embodiment of the present utility model;
fig. 3 is a schematic view of fig. 2 taken along line A-A in a rotational section.
Wherein 1 is the casing, 2 is left side gear, 3 is left side gear, 4 is right side gear, 5 is right side gear, 6 pushes away the pad, 7 is the elastic component, 8 is the cylindric lock, 9 is the left end cover, 10 is the right end cover, 11 is connecting bolt.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide an automobile and a limited slip differential, which are used for solving the problems in the prior art, relieving the wheel slip phenomenon and improving the running performance of the automobile.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
The utility model provides a limited slip differential, which comprises a shell 1, a left end gear set and a right end gear set, wherein the left end gear set and the right end gear set are arranged in the shell 1, the left end gear set comprises a left half shaft gear 2 and a left planetary gear 3, the left half shaft gear 2 and the left planetary gear 3 are rotatably arranged in the shell 1, the left half shaft gear 2 and the shell 1 are coaxially arranged, the left planetary gear 3 is arranged around the axis of the left half shaft gear 2, and the left half shaft gear 2 is meshed with the left planetary gear 3; the right end gear group comprises a right half shaft gear 4 and a right planetary gear 5, the right half shaft gear 4 and the right planetary gear 5 are rotatably arranged in the shell 1, the right half shaft gear 4 is coaxially arranged with the shell 1, the right planetary gear 5 is arranged around the axis of the right half shaft gear 4, and the right half shaft gear 4 is meshed with the right planetary gear 5; the right planetary gear 5 is meshed with the left planetary gear 3 and corresponds to the left planetary gear 3 one by one; the left half-shaft gear 2 and the right half-shaft gear 4 are arranged along the axial direction of the shell 1, a pre-tightening element is arranged between the left half-shaft gear 2 and the right half-shaft gear 4, the pre-tightening element simultaneously applies axial pre-tightening force to the left half-shaft gear 2 and the right half-shaft gear 4, and the pre-tightening element always rotates synchronously with the shell 1; the left side gear 2 and the right side gear 4 can each be in driving connection with a wheel.
When the limited slip differential of the utility model works, the input power of an automobile axle is transmitted to the shell 1 through the driven gear of the main speed reducer, the shell 1 rotates along with the driven gear, the left planetary gear 3 and the right planetary gear 5 arranged in the shell 1 revolve around the axis of the shell 1 along with the shell 1, the revolution of the left planetary gear 3 and the right planetary gear 5 can drive the left side shaft gear 2 and the right side shaft gear 4 meshed with the left planetary gear 3 and the right side shaft gear to rotate along with the shell 1, and the power is transmitted to the wheel half shaft through the left side shaft gear 2 and the right side shaft gear 4, so that the wheels are driven to advance or retreat. It is further emphasized that the pre-tightening element is arranged between the left side gear 2 and the right side gear 4, the pre-tightening element can apply axial pre-tightening force to the left side gear 2 and the right side gear 4 simultaneously, the left side gear 2 and the right side gear 4 are compressed, friction force in the differential is increased, and when one side wheel loses adhesion completely, the shell 1 can still transmit partial torque to the side wheel through the pre-tightening element, so that the slipping and the trapping of the wheel are prevented.
When the vehicle turns, the rotation speed of the outer wheel is higher than that of the inner wheel, and in the case of forward left turning, the rotation speed of the right wheel is higher than that of the left wheel, the right wheel drives the right side shaft gear 4 to rotate clockwise beyond the rotation speed of the shell 1 through the wheel half shaft, the right side shaft gear 4 drives the right planetary gear 5 meshed with the right side shaft gear 4 to generate anticlockwise rotation, the rotation of the right planetary gear 5 drives the left planetary gear 3 meshed with the right side shaft gear 3 to generate clockwise rotation, the clockwise rotation of the left planetary gear 3 drives the left side shaft gear 2 meshed with the left side shaft gear 2 to generate anticlockwise rotation, and the anticlockwise rotation of the left side shaft gear 2 leads the rotation speed of the left side shaft gear to be lower than that of the shell 1, and finally the rotation speed of the left side wheel is lower than that of the right side wheel, so that smooth steering is realized. The above rotational speed transfer is accompanied by torque transfer, and a large part of the torque of the right side gear 4 is transferred to the left side gear 2, so that the slow end torque is larger than the fast end torque, and the torque ratio can be 3:1 generally. The other direction steering and the reversing steering are the same.
Specifically, the pretension component includes thrust pad 6 and elastic component 7, the tip of left side gear 2 and right side gear 4 all is provided with thrust pad 6, thrust pad 6 offsets with casing 1, drive thrust pad 6 synchronous rotation all the time when casing 1 rotates, elastic component 7 is located between two thrust pads 6, elastic component 7 is in compressed state, elastic component 7 makes thrust pad 6 support tightly at the tip of left side gear 2, right side gear 4, in thrust pad 6 along with casing 1 rotation in-process, with torque transmission to left side gear 2, right side gear 4, when the wheel thoroughly loses adhesive force, prevent that the wheel from skidding and trapping.
In the specific embodiment, the elastic piece 7 is a belleville spring, and the belleville spring is easy to obtain and convenient to install; the elastic pieces 7 are in one-to-one correspondence with the thrust pads 6, and press the thrust pads 6 against the ends of the left side gear 2 and the right side gear 4. In other specific embodiments of the present utility model, the elastic member 7 may also select other types of springs, jump springs or reed, so as to adapt to different working conditions and meet the working requirements of the differential mechanism.
More specifically, a cylindrical pin 8 is provided between the housing 1 and the thrust pad 6, and the cylindrical pin 8 can restrict the relative position of the thrust pad 6 and the housing 1. In practical application, can all set up the semicircle keyway on casing 1 and thrust pad 6, two semicircle keyways enclose into the constant head tank with cylindric lock 8 looks adaptation, cylindric lock 8 sets up in the constant head tank, and the axis of constant head tank and cylindric lock 8 is on a parallel with the axis of casing 1, prevents that thrust pad 6 from producing rotation for casing 1, ensures that casing 1 can pass through thrust pad 6 left side gear 2, right side gear 4 transmission power.
In this embodiment, the number of the left planetary gears 3 and the right planetary gears 5 is four, the left planetary gears 3 are circumferentially uniformly distributed around the axis of the left side gear 2, the right planetary gears 5 are circumferentially uniformly distributed around the axis of the right side gear 4, and the left planetary gears 3 are meshed with the right planetary gears 5 and are in one-to-one correspondence. In practical application, the number of the left planetary gears 3 and the right planetary gears 5 can be adjusted according to the specification of the differential mechanism, so that specific working conditions are met.
In order to facilitate the installation of the left and right planetary gears 3 and 5, the housing 1 has installation holes adapted to the left and right planetary gears 3 and 5, and further improves the movement stability of the left and right planetary gears 3 and 5 while ensuring that the left and right planetary gears 3 and 5 are engaged with the right and left side gears 5 and 5 are smoothly engaged with the respective side gears.
The limited slip differential of the present utility model further comprises a left end cover 9 and a right end cover 10, wherein the left end cover 9 and the right end cover 10 are respectively arranged at the left side and the right side of the housing 1, the left end cover 9 and the right end cover 10 are respectively detachably connected with the housing 1, the left end cover 9 is matched with the housing 1 to fix the axial positions of the left side gear 2 and the left planetary gear 3, and the right end cover 10 is matched with the housing 1 to fix the axial positions of the right side gear 4 and the right planetary gear 5. The outer circle of the left side of the left end cover 9 is used for installing a differential bearing, and the outer circle of the right end cover 10 is used for installing the differential bearing.
In order to improve the convenience of disassembly and assembly of the differential mechanism, the left end cover 9 and the right end cover 10 are detachably connected with the shell 1 by connecting bolts 11, are connected and fastened, and are convenient to disassemble and assemble; the number of the connecting bolts 11 is multiple, the bolts are uniformly distributed around the axial line circumference of the shell 1, and the stress uniformity of the left end cover 9, the right end cover 10 and the shell 1 is improved. The connecting bolt 11 may be of a suitable type, such as an outer hexagonal bolt, an inner hexagonal bolt, etc., according to the installation needs of the differential.
It is also emphasized that the helix angles of the left side gear 2, the left planetary gear 3, the right side gear 4 and the right planetary gear 5 range from 30 to 40;
the large helix angle cylindrical gear meshing pair has the characteristic of larger internal friction, when two side gears (a left side gear 2 and a right side gear 4) generate a speed difference, two groups of planetary gears (a left planetary gear 3 and a right planetary gear 5) meshed with the two side gears generate autorotation, and the planetary gears respectively press against the outer inner wall of a mounting hole (the inner wall of the mounting hole on the side far away from the axis of the shell 1) and rub with the outer inner wall of the mounting hole in the autorotation process due to a certain pressure angle of the gears, so that rotational resistance is generated; centrifugal force exerted on each planetary gear revolving at high speed together with the housing 1 also presses the planetary gear against the outer inner wall of the mounting hole; meanwhile, each gear of the large helix angle cylindrical gear meshing pair has a large helix angle, large axial force is generated during meshing, the end faces of the side gears and the planet gears are forced to press against the shell 1 and the two end covers (the left end cover 9 and the right end cover 10) respectively, the side gears and the planet gears are contacted with the shell 1 and the two end covers, and the friction of the end faces can further lead to the rotation resistance of the meshing pair. The resultant force of the three forces causes a larger internal friction force to be generated inside the differential, thereby realizing the purpose of limiting the wheel slip.
The left side gear 2 and the right side gear 4 each have an involute spline that can be matched with a wheel axle shaft, and the left side gear 2 and the right side gear 4 are connected to the wheel axle shaft by using involute internal splines, so that power is transmitted to left and right wheels.
Further, the utility model also provides an automobile comprising the limited slip differential, compared with an open differential in the prior art, the limited slip differential provided by the utility model utilizes the characteristic that the large helical angle gear pair has larger internal friction force, can distribute different torques to two wheels in real time, and can transmit partial torques to one wheel through the pre-tightening element even if the one wheel thoroughly loses adhesion force, so that the slipping of the wheels is prevented, and the running performance of the automobile is improved.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (10)
1. A limited slip differential comprising a housing and a plurality of differential gears disposed within the housing:
the left end gear set comprises a left half shaft gear and a left planetary gear, the left half shaft gear and the left planetary gear are rotatably arranged in the shell, the left half shaft gear and the shell are coaxially arranged, the left planetary gear is arranged around the axis of the left half shaft gear, and the left half shaft gear is meshed with the left planetary gear;
the right end gear set comprises a right half shaft gear and a right planetary gear, the right half shaft gear and the right planetary gear are rotatably arranged in the shell, the right half shaft gear and the shell are coaxially arranged, the right planetary gear is arranged around the axis of the right half shaft gear, and the right half shaft gear is meshed with the right planetary gear;
the right planetary gear is meshed with the left planetary gear and corresponds to the left planetary gear one by one; the left half shaft gear and the right half shaft gear are arranged along the axial direction of the shell, a pre-tightening element is arranged between the left half shaft gear and the right half shaft gear, the pre-tightening element simultaneously applies axial pre-tightening force to the left half shaft gear and the right half shaft gear, and the pre-tightening element always rotates synchronously with the shell; the left side gear and the right side gear can be in driving connection with the wheels.
2. The limited slip differential according to claim 1, wherein: the pre-tightening element comprises a thrust pad and an elastic piece, the end parts of the left half-shaft gear and the right half-shaft gear are respectively provided with the thrust pad, the elastic piece is positioned between the two thrust pads, and the elastic piece is in a compression state.
3. The limited slip differential according to claim 2, wherein: the elastic pieces are disc springs, and the elastic pieces correspond to the thrust pads one by one.
4. The limited slip differential according to claim 2, wherein: a cylindrical pin is arranged between the shell and the thrust pad, and the cylindrical pin can limit the relative position of the thrust pad and the shell.
5. The limited slip differential according to claim 1, wherein: the number of the left planetary gears and the number of the right planetary gears are four, the left planetary gears are circumferentially and uniformly distributed around the axis of the left side shaft gear, and the right planetary gears are circumferentially and uniformly distributed around the axis of the right side shaft gear.
6. The limited slip differential according to claim 5, wherein: the housing has mounting holes for mating with the left and right planetary gears.
7. The limited slip differential according to claim 1, wherein: still include left end cover and right-hand member lid, the left end cover with the right-hand member lid set up respectively in the left and right sides of casing, the left end cover with the right-hand member lid respectively in the casing detachable connection.
8. The limited slip differential according to claim 7, wherein: the left end cover and the right end cover are detachably connected with the shell through connecting bolts; the number of the connecting bolts is multiple, and the bolts are uniformly distributed around the axis of the shell in the circumferential direction.
9. The limited slip differential according to any one of claims 1-8, wherein: the helical angles of the left half shaft gear, the left planetary gear, the right half shaft gear and the right planetary gear range from 30 degrees to 40 degrees;
the left side gear and the right side gear each have involute splines that are adaptable to the wheel axle shafts.
10. An automobile, characterized in that: a limited slip differential comprising the limited slip differential of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321861103.8U CN220286342U (en) | 2023-07-14 | 2023-07-14 | Automobile and limited slip differential |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321861103.8U CN220286342U (en) | 2023-07-14 | 2023-07-14 | Automobile and limited slip differential |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220286342U true CN220286342U (en) | 2024-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321861103.8U Active CN220286342U (en) | 2023-07-14 | 2023-07-14 | Automobile and limited slip differential |
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| Country | Link |
|---|---|
| CN (1) | CN220286342U (en) |
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2023
- 2023-07-14 CN CN202321861103.8U patent/CN220286342U/en active Active
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