Differential mechanism
By designing a differential with a simple structure and easy to disassemble, using a one-way bearing limit sleeve and a one-way bearing to achieve the differential effect, the traditional differential has a complex structure, large space and high cost, and the vehicle can achieve synchronous differential and better escape ability when turning.
Patent Information
- Application Number
- CN202420887477.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-03-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional differentials have complex structures, large space occupancy, high cost, high design difficulty and low fault tolerance, which increases the complexity of automobile layout and cost control difficulty.
A differential including a housing, an input assembly, a differential assembly and an output assembly is designed, and a unidirectional bearing limit sleeve, a first unidirectional bearing and a second unidirectional bearing are used to achieve the differential effect. The structure is simple, easy to disassemble and low cost.
The synchronization of the speed difference between the wheels on both sides of the front end during cornering is achieved, which enhances the vehicle's ability to escape from difficulties. The overall structure is simple, which reduces weight, reduces space occupation, and reduces production costs.
Smart Images
Figure CN222559113U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobiles, in particular to a differential. Background Art
[0002] Baja SAE China (BSC) is a competition for off-road vehicle design, manufacturing and testing, which is participated by teams of students from colleges and vocational schools majoring in automobiles and related majors. The participating teams shall design and manufacture a single-seat, mid-engine, rear-wheel drive small off-road vehicle or a four-wheel drive small off-road vehicle in accordance with the competition rules and racing car manufacturing standards within the specified time and using the same model engine.
[0003] Since the turning radius of the inner and outer front wheels is different when the racing car turns, a differential needs to be installed to create a speed difference between the inner and outer wheels, so that the turning can be achieved more smoothly.
[0004] Traditional bevel gear differentials and planetary gear differentials have relatively complex structures and are difficult to design. They occupy a relatively large volume, occupying passenger space and increasing the complexity of the vehicle's overall layout. They are relatively expensive and have a low design tolerance, which increases the difficulty of cost control. Utility Model Content
[0005] The utility model aims to provide a differential to solve the problems existing in the prior art, which has a simple structure, reduces space occupation, is easy to disassemble and has low cost.
[0006] To achieve the above purpose, the utility model provides the following solutions:
[0007] The utility model provides a differential, comprising a housing, an input assembly, a differential assembly and an output assembly; the housing has a housing cavity and a first outlet and a second outlet communicated with the housing cavity; the input assembly comprises an input shaft; the differential assembly comprises a one-way bearing limiting sleeve, a first one-way bearing and a second one-way bearing; the output assembly comprises a left output shaft and a right output shaft; the one-way bearing limiting sleeve is rotatably arranged in the housing cavity; the first one-way bearing and the second one-way bearing are both unidirectionally rotatably arranged in the one-way bearing limiting sleeve; one end of the input shaft is transmission-connected with the one-way bearing limiting sleeve; one end of the left output shaft passes through the first outlet and is fixedly connected with the first one-way bearing; one end of the right output shaft passes through the second outlet and is fixedly connected with the second one-way bearing; the input shaft can drive the one-way bearing limiting sleeve to rotate and drive the first one-way bearing and the second one-way bearing to rotate synchronously.
[0008] Preferably, a transmission tooth is fixedly provided at one end of the input shaft, a conical tooth is fixedly provided on the one-way bearing limiting sleeve, and the transmission tooth meshes with the conical tooth for transmission.
[0009] Preferably, both ends of the one-way bearing limiting sleeve are rotatably disposed in the accommodating cavity via a first bearing respectively.
[0010] Preferably, the shell comprises a left shell and a right shell, the inner cavity of the left shell and the right shell after closing forms the accommodating cavity, and the left shell and the right shell can be fixedly connected.
[0011] Preferably, an end cover and an input shaft housing are fixedly provided on the right housing, a second bearing is fixedly provided inside the end cover and the input shaft housing, and the input shaft is passed through and fixed on the inner ring of the second bearing.
[0012] Preferably, the first bearing is an angular contact bearing.
[0013] Preferably, the second bearing is a tapered roller bearing.
[0014] Preferably, the left output shaft and the right output shaft are both rotatably connected to the housing via a third bearing, and the left output shaft and the right output shaft are both rotatably connected to the one-way bearing limiting sleeve via a fourth bearing.
[0015] Preferably, the third bearing and the fourth bearing are both deep groove ball bearings.
[0016] Preferably, a fifth bearing is provided on the left output shaft located outside the accommodating cavity, and an outer ring of the fifth bearing is mounted on a bearing bracket, and the bearing bracket can be connected to the vehicle frame.
[0017] Compared with the prior art, the utility model has achieved the following technical effects:
[0018] The differential provided by the utility model realizes the differential of the front wheels on both sides by adopting the first one-way bearing and the second one-way bearing to be connected with the left output shaft and the right output shaft respectively, so as to meet the situation that the rotation speeds of the wheels on both sides of the front end are different when turning, and at the same time, the power is transmitted from the rear transfer case to the wheels at the front end, and when the road adhesion is low, the power is continuously transmitted to the wheels, so that the vehicle has a better escape ability; when the rotation speed of the wheel is less than or equal to the rotation speed input by the input shaft, the first one-way bearing and the second one-way bearing are normally in a locked state, that is, the power is transmitted; when the rotation speed of the wheel is greater than the rotation speed input by the input shaft, the first one-way bearing and the second one-way bearing have their own one-way rolling characteristics, and at this time, the wheels on both sides have a differential effect; the overall structure is simple, the traditional open differential is abandoned, and the one-way bearing is adopted to play a differential role, which reduces the weight and reduces the occupation of space, and at the same time, the structure is simple and easy to disassemble.
[0019] Furthermore, the transmission connection between the input shaft and the one-way bearing limit sleeve is realized by using transmission teeth and conical teeth, and the transmission structure is simple, stable and reliable.
[0020] Furthermore, the one-way bearing limit sleeve adopts the first bearing to realize rotation in the accommodating cavity, and has a simple structure, is convenient for installation and disassembly, and ensures stable rotation of the one-way bearing limit sleeve, thereby reducing wear.
[0021] Furthermore, the shell is formed by a left shell and a right shell, which facilitates the installation and disassembly of various internal components and facilitates daily maintenance and repair.
[0022] Furthermore, two second bearings are used to limit and fix the input shaft, which has a simple structure and can ensure stable power input of the input shaft.
[0023] Furthermore, an angular contact bearing is used to realize the rotation setting of the one-way bearing limit sleeve, which can bear radial load and axial load at the same time, ensuring the stable rotation and high rotation accuracy of the one-way bearing limit sleeve.
[0024] Furthermore, a tapered roller bearing is used to rotate the input shaft, which can maintain stable operation when subjected to a large load, reduce the operating noise and vibration of the mechanical equipment, and the tapered roller bearing has good durability and is easy to install and maintain.
[0025] Furthermore, the left output shaft and the right output shaft are both rotatably connected to the housing via a third bearing, and are both rotatably connected to the one-way bearing limit sleeve via a fourth bearing, which can ensure stable rotation of the left output shaft and the right output shaft.
[0026] Furthermore, the use of deep groove ball bearings can provide good support for the left output shaft and the right output shaft, reduce wear and extend their service life.
[0027] Furthermore, the provision of the fifth bearing can ensure a stable rotational operation state of the left output shaft and the frame bracket. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 A schematic diagram of the structure of the differential provided by the utility model;
[0030] Figure 2An exploded view of the differential provided by the utility model;
[0031] Figure 3 This is a schematic cross-sectional structure diagram of a differential provided by the utility model.
[0032] In the figure: 100 - differential;
[0033] 10-input shaft; 11-end cover; 12-input shaft housing; 13-second bearing; 14-transmission gear; 15-second gasket;
[0034] 20-one-way bearing limiting sleeve; 21-first one-way bearing; 22-second one-way bearing; 23-conical gear; 24-first bearing; 25-first gasket;
[0035] 30-left output shaft; 31-third bearing; 32-fourth bearing; 33-fifth bearing; 34-bearing bracket; 35-bracket assembly;
[0036] 40-right output shaft;
[0037] 50-left housing;
[0038] 60-Right housing. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0040] The utility model aims to provide a differential to solve the problems existing in the prior art, with a simple structure, reduced space occupation, easy disassembly and low cost.
[0041] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0042] Embodiment 1
[0043] This embodiment provides a differential 100, such as Figure 1 to Figure 3As shown, the differential is mainly but not limited to a Baja racing car, a small off-road vehicle, a beach car, etc., and includes a housing, an input assembly, a differential assembly and an output assembly; the housing has a housing cavity and a first outlet and a second outlet connected to the housing cavity; the input assembly includes an input shaft 10; the differential assembly includes a one-way bearing limit sleeve 20, a first one-way bearing 21 and a second one-way bearing 22; the output assembly includes a left output shaft 30 and a right output shaft 40; the one-way bearing limit sleeve 20 is rotatably arranged in the housing cavity; the first one-way bearing 21 and the second one-way bearing 22 are both unidirectionally rotatably arranged in the one-way bearing limit sleeve 20; one end of the input shaft 10 is transmission-connected with the one-way bearing limit sleeve 20; one end of the left output shaft 30 passes through the first outlet and is fixedly connected to the first one-way bearing 21; one end of the right output shaft 40 passes through the second outlet and is fixedly connected to the second one-way bearing 22; the input shaft 10 can drive the one-way bearing limit sleeve 20 to rotate and drive the first one-way bearing 21 and the second one-way bearing 22 to rotate synchronously.
[0044] By adopting the first one-way bearing 21 and the second one-way bearing 22 connected to the left output shaft 30 and the right output shaft 40 respectively, the differential of the front wheels on both sides is realized, which meets the situation that the rotation speeds of the wheels on both sides of the front end are different when turning, and at the same time, the power is transmitted from the rear transfer case to the wheels at the front end, and when the road adhesion is low, the power is continuously transmitted to the wheels, so that the vehicle has a better ability to get out of trouble; when the rotation speed of the wheel is less than or equal to the rotation speed input by the input shaft 10, the first one-way bearing 21 and the second one-way bearing 22 are normally in a locked state, that is, the power is transmitted; when the rotation speed of the wheel is greater than the rotation speed input by the input shaft 10, the first one-way bearing 21 and the second one-way bearing 22 have their own one-way rolling characteristics, and the wheels on both sides have a differential effect at this time; the overall structure is simple, and the traditional open differential is abandoned, and the one-way bearing is used to play a differential role, which reduces weight and reduces space occupation. At the same time, the structure is simple and easy to disassemble.
[0045] The connection between the first one-way bearing 21 and the second one-way bearing 22 and the one-way bearing limiting sleeve 20 is as follows:
[0046] Specifically, the first one-way bearing 21 and the second one-way bearing 22 are coaxially arranged in the one-way bearing limiting sleeve 20 .
[0047] Specifically, the first one-way bearing 21 and the second one-way bearing 22 are wedge-type one-way bearings. Since the inner and outer rings of the bearings can only move relative to each other in one direction, they and the one-way bearing limit sleeve 20 together realize the function of one-way power transmission.
[0048] Specifically, the first one-way bearing 21 and the second one-way bearing 22 are located at the center of the differential 100 .
[0049] Among them, the connection structure between the one-way bearing limiting sleeve 20 and the input shaft 10 is:
[0050] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, a transmission tooth 14 is fixedly disposed at one end of the input shaft 10, and a conical tooth 23 is fixedly disposed on the one-way bearing limiting sleeve 20, and the transmission tooth 14 is meshed with the conical tooth 23 for transmission. The transmission tooth 14 and the conical tooth 23 are used to realize the transmission connection between the input shaft 10 and the one-way bearing limiting sleeve 20, and the transmission structure is simple, stable and reliable.
[0051] Specifically, a rectangular spline is fixedly arranged on the outer side of the one-way bearing limit sleeve 20 in the circumferential direction, and the conical teeth 23 are fixedly connected to the one-way bearing limit sleeve 20 through the rectangular spline. The bevel gear transmits the force to the one-way bearing limit sleeve 20, and transmits the power to the left output shaft 30 and the right output shaft 40 through the first one-way bearing 21 and the second one-way bearing 22. Due to the above power transmission method, when the ground adhesion at both ends of the differential 100 is different, when one side of the wheel slips, the differential 100 of this example will selectively transmit the power to the side with a slower speed due to the characteristic that the one-way bearing can only transmit power in one direction, thereby achieving the effect of limited slip.
[0052] About the structure of the shell:
[0053] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the housing includes a left housing 50 and a right housing 60. The inner cavities of the left housing 50 and the right housing 60 are closed to form a receiving cavity, and the left housing 50 and the right housing 60 can be fixedly connected. The left housing 50 and the right housing 60 are used to form the housing, which facilitates the installation and disassembly of various internal components and facilitates daily maintenance and repair.
[0054] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, the right housing 60 is fixedly provided with an end cover 11 and an input shaft housing 12, both of which have bearing holes, and the bearing holes are fixedly provided with second bearings 13, and the input shaft 10 is passed through and fixed on the inner ring of the second bearing 13. The two second bearings 13 are used to limit and fix the input shaft 10, and the structure is simple, which can ensure the stable power input of the input shaft 10.
[0055] Specifically, a second gasket 15 may be provided in the end cover 11 according to actual conditions, wherein the second gasket 15 serves as a limit for the input shaft 10 .
[0056] In the optional scheme of this embodiment, it is more preferred that the second bearing 13 is a tapered roller bearing. The tapered roller bearing is used to rotate the input shaft 10, which can maintain stable operation when bearing a large amount of load, reduce the operating noise and vibration of the mechanical equipment, and the tapered roller bearing has good durability and is easy to install and maintain.
[0057] Specifically, flanges are provided at the docking positions of the left housing 50 and the right housing 60 , and at the docking positions of the end cover 11 and the input shaft housing 12 , and threaded holes for fixing the end cover 11 and the input shaft housing 12 are provided on the right housing 60 .
[0058] Specifically, the left housing 50 is provided with a first outlet, the right housing 60 is provided with a second outlet; and the right housing 60 is provided with an opening for the input shaft 10 to pass through.
[0059] Specifically, in order to enhance the strength, reinforcing ribs may be provided on the outer side walls of the first outlet and the second outlet, and the reinforcing ribs are radially distributed around the first outlet or the second outlet.
[0060] Specifically, the housing may be provided with an oil filling hole and / or an oil drain hole according to actual needs.
[0061] Among them, regarding the connection between the one-way bearing limit sleeve 20 and the housing:
[0062] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, both ends of the one-way bearing limit sleeve 20 are rotatably arranged in the accommodating cavity through a first bearing 24. The one-way bearing limit sleeve 20 adopts the first bearing 24 to realize the rotatable arrangement in the accommodating cavity, and its structure is simple, and it is convenient to install and disassemble, and it ensures the stable rotation of the one-way bearing limit sleeve 20 and reduces wear.
[0063] In the optional scheme of this embodiment, it is more preferred that the first bearing 24 is an angular contact bearing. The angular contact bearing is used to realize the rotation setting of the one-way bearing limit sleeve 20, which can bear radial load and axial load at the same time, ensuring the stable rotation and high rotation accuracy of the one-way bearing limit sleeve 20.
[0064] Specifically, a plurality of first gaskets 25 are provided between the first bearing 24 and the conical teeth 23 , wherein the first gaskets 25 can effectively limit the one-way bearing limiting sleeve 20 and the first bearing 24 .
[0065] Among them, regarding the fixing of the left output shaft 30 / right output shaft 40:
[0066] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2As shown, the left output shaft 30 and the right output shaft 40 are both rotatably connected to the housing through a third bearing 31, and the left output shaft 30 and the right output shaft 40 are both rotatably connected to the one-way bearing limit sleeve 20 through a fourth bearing 32. The left output shaft 30 and the right output shaft 40 are both rotatably connected to the housing through a third bearing 31, and are both rotatably connected to the one-way bearing limit sleeve 20 through a fourth bearing 32, which can ensure the stable rotation of the left output shaft 30 and the right output shaft 40.
[0067] In the optional solution of this embodiment, it is more preferred that the third bearing 31 and the fourth bearing 32 are both deep groove ball bearings. The use of deep groove ball bearings can provide good support for the left output shaft 30 and the right output shaft 40, reduce wear and tear, and extend their service life.
[0068] Specifically, the ends of the left output shaft 30 and the right output shaft 40 located in the accommodating cavity of the housing do not contact each other.
[0069] Among the optional solutions of this embodiment, it is more preferred that Figure 1 and Figure 2 As shown, a fifth bearing 33 is provided on the left output shaft 30 located outside the accommodating cavity, and the outer ring of the fifth bearing 33 is installed on a bearing bracket 34, and the bearing bracket 34 can be connected to the frame. The arrangement of the fifth bearing 33 can ensure a stable rotational operation state of the left output shaft 30 and the frame bracket.
[0070] The connection between the differential 100 and the vehicle frame of this embodiment is as follows:
[0071] Specifically, a bracket assembly 35 is fixedly connected to the bearing bracket 34. The bracket assembly 35 can be a wedge-shaped bracket, a porous bracket, etc. The bracket assembly 35, the left shell 50 and the right shell 60 are respectively used to be fixedly connected to the vehicle frame.
[0072] The differential 100 of this embodiment has the output characteristics of high efficiency, stability and strong adjustability, ensures the four-wheel drive performance and reliability of the differential system used in Baja racing cars and small off-road vehicles, and has a stable structure.
[0073] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A differential, characterized in that: It includes a housing, an input assembly, a differential assembly, and an output assembly; The housing has a housing cavity and a first outlet and a second outlet communicating with the housing cavity; The input assembly includes an input shaft; The differential assembly comprises a one-way bearing limiting sleeve, a first one-way bearing and a second one-way bearing; The output assembly includes a left output shaft and a right output shaft; The one-way bearing limit sleeve is rotatably arranged in the accommodating cavity; the first one-way bearing and the second one-way bearing are both unidirectionally rotatably arranged in the one-way bearing limit sleeve; one end of the input shaft is transmission-connected with the one-way bearing limit sleeve; one end of the left output shaft passes through the first outlet and is fixedly connected with the first one-way bearing; one end of the right output shaft passes through the second outlet and is fixedly connected with the second one-way bearing; the input shaft can drive the one-way bearing limit sleeve to rotate and drive the first one-way bearing and the second one-way bearing to rotate synchronously.
2. The differential according to claim 1, characterized in that: One end of the input shaft is fixedly provided with a transmission tooth, and the one-way bearing limiting sleeve is fixedly provided with a conical tooth, and the transmission tooth meshes with the conical tooth for transmission.
3. The differential according to claim 1, characterized in that: Both ends of the one-way bearing limiting sleeve are rotatably arranged in the accommodating cavity through a first bearing respectively.
4. The differential according to claim 1, characterized in that: The shell comprises a left shell and a right shell. The inner cavity of the left shell and the right shell after closing forms the accommodating cavity. The left shell and the right shell can be fixedly connected.
5. The differential according to claim 4, characterized in that: An end cover and an input shaft housing are fixedly arranged on the right housing, a second bearing is fixedly arranged inside the end cover and the input shaft housing, and the input shaft is passed through and fixed on the inner ring of the second bearing.
6. The differential according to claim 3, characterized in that: The first bearing is an angular contact bearing.
7. The differential according to claim 5, characterized in that: The second bearing is a tapered roller bearing.
8. The differential according to claim 1, characterized in that: The left output shaft and the right output shaft are both rotatably connected to the housing via a third bearing, and the left output shaft and the right output shaft are both rotatably connected to the one-way bearing limiting sleeve via a fourth bearing.
9. The differential according to claim 8, characterized in that: The third bearing and the fourth bearing are both deep groove ball bearings.
10. The differential according to claim 1, characterized in that: A fifth bearing is provided on the left output shaft located outside the accommodating cavity, and an outer ring of the fifth bearing is mounted on a bearing bracket, and the bearing bracket can be connected to the vehicle frame.