CN214197176U - Automobile-used leading reduction gear with parking braking function - Google Patents
Automobile-used leading reduction gear with parking braking function Download PDFInfo
- Publication number
- CN214197176U CN214197176U CN202023216736.2U CN202023216736U CN214197176U CN 214197176 U CN214197176 U CN 214197176U CN 202023216736 U CN202023216736 U CN 202023216736U CN 214197176 U CN214197176 U CN 214197176U
- Authority
- CN
- China
- Prior art keywords
- parking brake
- input shaft
- shaft
- power input
- stepped shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Braking Arrangements (AREA)
Abstract
A vehicle front-mounted speed reducer with a parking braking function comprises a box body, a power output shaft, a power input shaft and a speed reduction gear set, wherein a transparent cover is fixedly arranged on the side wall of the box body, the outer part of the transparent cover is coaxially and fixedly connected with a power input shaft rear end cover, and the outer part of the power input shaft rear end cover is coaxially and fixedly connected with a parking braking bottom plate assembly; one end of the power input shaft sequentially and axially penetrates through the transparent cover, the rear end cover and the parking brake bottom plate assembly, and a parking brake drum assembly which is matched with the parking brake bottom plate assembly for braking is coaxially and fixedly arranged on the power input shaft at the end. The speed reducer is arranged as a front drive, greatly shortens the distance from the parking control handle to the parking brake, shortens the length of the parking brake cable assembly, improves the parking brake efficiency, reduces the working stroke of the parking control handle, and has simple and reliable structure.
Description
Technical Field
The utility model relates to an auto-parts technical field specifically is an automobile-used leading reduction gear with parking braking function.
Background
In the current automobile industry, for heavy vehicles, drum brakes are generally adopted because the speed of the vehicle is not very high, a parking brake is generally installed on the rear axle wheels and is integrated with a service brake, and the braking principle is shown in figure 1 (a schematic diagram of a rear wheel drum brake of an automobile).
The disadvantages of the installation mode are as follows:
1. the parking brake control handle is arranged in front of the vehicle, and the parking brake mechanism is arranged on the rear axle wheel, and the parking brake efficiency is lower due to the longer distance of the brake pull wire;
2. since the parking brake is mounted on the wheel, the parking brake is required to have a large braking torque:
3. since a parking brake with a large braking torque is required, the parking brake needs to be correspondingly large in size, which takes up a large amount of space.
Through published patent searches, the following comparison documents were found:
an inner rotor motor and drum brake structure with a speed reducer (CN2807584) discloses an inner rotor motor and drum brake structure with a speed reducer, which comprises a wheel hub, a wheel rim, a drum brake, a wheel disc, an inner rotor motor and a speed reducer. An output shaft of the inner rotor motor penetrates through the drum brake through the speed reducer and then is fixedly connected with a wheel hub, and the outer side surface of the wheel hub is fixedly connected with a wheel disc of a tire; and a brake drum of the drum brake is fixedly connected with the inner side surface of the hub. The driving capability of the electric automobile (in a hybrid electric vehicle motor mode) can be fully ensured by adopting the structure; the installation mode ensures the braking effect of the automobile, and the mechanism is very simple in design, manufacture and installation.
Through analysis, the structure of the inner rotor motor with the speed reducer and the drum brake in the patent has great difference with the structure and function of the application, so that the novelty of the application is not influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide an automobile-used leading reduction gear with parking braking function, this reduction gear arranges to leading forerunner, great shortening the distance between parking brake lever to the parking brake, has shortened parking braking cable assembly length, has improved parking braking efficiency, has reduced parking brake lever's working stroke, and simple structure is reliable.
The utility model provides a leading reduction gear of automobile-used with parking braking function, this reduction gear includes box, power output shaft, power input shaft and reduction gear set, wherein the inside power output shaft, power input shaft and the reduction gear set of rotating connection of box, its characterized in that on the power output shaft is transmitted rotary power through reduction gear set by the power input shaft: a through cover is fixedly arranged on the side wall of the box body, a power input shaft rear end cover is coaxially and fixedly connected to the outside of the through cover, and a parking brake bottom plate assembly is coaxially and fixedly connected to the outside of the power input shaft rear end cover; one end of the power input shaft sequentially and axially penetrates through the transparent cover, the rear end cover and the parking brake bottom plate assembly, and a parking brake drum assembly which is matched with the parking brake bottom plate assembly for braking is coaxially and fixedly arranged on the power input shaft at the end.
The power input shaft is a stepped shaft, the power input end of the power input shaft penetrates through and is rotatably connected to the box body, the middle part of the power input shaft is meshed with the gear set through the driving teeth, and the power output end of the power input shaft is made into the stepped shaft; the stepped shaft comprises a first-stage stepped shaft, a second-stage stepped shaft, a third-stage stepped shaft, a fourth-stage stepped shaft and a fifth-stage stepped shaft which are coaxially and fixedly arranged from the middle part of the power output shaft to the end part of the power input shaft in sequence and have diameters reduced in sequence.
Moreover, an inner ring seat of the deep groove ball bearing is fixedly sleeved on the circumferential outer wall of the secondary stepped shaft; an outer ring seat of the deep groove ball bearing is fixedly clamped inside the transparent cover, one end of the deep groove ball bearing is limited by the axial end face of the first-stage stepped shaft, and the other end of the deep groove ball bearing is limited by the axial direction of the rear end cover of the power input shaft.
And moreover, an inner framework rubber oil seal is hermetically sleeved on the circumferential outer wall of the three-stage stepped shaft, and the circumferential outer wall of the inner framework rubber oil seal is supported on the circumferential inner wall of the rear end cover of the power input shaft in a jacking mode.
And the periphery of the four-stage stepped shaft is provided with a plurality of involute splines which extend axially and are uniformly distributed in the circumferential direction, and the four-stage stepped shaft is connected with the parking brake bottom plate assembly in a circumferential limiting manner through the involute splines.
Moreover, external threads are formed on the periphery of the five-stage stepped shaft, and the five-stage stepped shaft axially penetrates through the parking brake drum assembly and is connected with a fixing nut; one end of the fixing nut axially limits and supports the parking brake drum assembly.
The utility model has the advantages and the technical effect be:
the utility model discloses a vehicle front reduction gear with parking braking function, arrange the reduction gear into leading forerunner, the great distance that has shortened between parking brake handle and the parking brake, the parking braking cable assembly has been shortened, and parking braking efficiency has been improved, and parking brake handle working stroke has been reduced correspondingly; and, for the same vehicle weight, if the parking brake is installed at one end of the power input shaft of the decelerator, the braking torque that the parking brake should generate can be reduced; the principle is that a speed reduction ratio i is arranged between a power input shaft and an output shaft of the speed reducer. If the parking brake is directly arranged on the wheel and the braking torque needing to be matched is X (N.m), the utility model discloses the braking torque needing to be matched to the parking brake is just X/i (N.m), and the value of i is usually between 5-12, so the reduction of the required parking braking torque is still considerable; and moreover, as the parking braking torque is greatly reduced, the volume of the parking brake is correspondingly reduced, which greatly facilitates the spatial arrangement of the parking brake and provides favorable factors for better overall vehicle arrangement.
Drawings
FIG. 1 is a schematic view of a prior art coupling mechanism for a rear drum brake of an automobile;
fig. 2 is a schematic structural view (partially cut away) of the vehicular front reduction gear of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a schematic structural diagram of a power input shaft of the present invention;
in the figure: 1-a power take-off shaft; 2-a reduction gear set; 3-a power input shaft; 4-through cover; 5-deep groove ball bearing; 6-rear end cap; 7-inner frame rubber oil seal; 8-parking brake shoe assembly; 9-fixing the nut; 10-a parking brake drum assembly; 11-a first-stage stepped shaft; 12-a secondary stepped shaft; 13-three-stage stepped shaft; 14-four-stage stepped shaft; 15-five-stage stepped shaft; 16-external threads; 17-involute splines.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments will be exemplified in conjunction with the accompanying drawings. It should be noted that the present embodiment is illustrative, not restrictive, and the scope of the invention should not be limited thereby.
The utility model provides a leading reduction gear of automobile-used with parking braking function, this reduction gear includes box, power output shaft 1, power input shaft 3 and reduction gear set 2, wherein power output shaft, power input shaft and reduction gear set are connected in the box inside rotation, its characterized in that on the power output shaft is transmitted rotary power through reduction gear set by the power input shaft: a transparent cover 4 is fixedly arranged on the side wall of the box body, a power input shaft rear end cover 6 is coaxially and fixedly connected to the outside of the transparent cover, and a parking brake bottom plate assembly 8 is coaxially and fixedly connected to the outside of the power input shaft rear end cover; one end of the power input shaft sequentially and axially penetrates through the transparent cover, the rear end cover and the parking brake bottom plate assembly, and a parking brake drum assembly 10 which is matched with the parking brake bottom plate assembly for braking is coaxially and fixedly arranged on the power input shaft at the end.
The power input shaft is a stepped shaft, the power input end of the power input shaft penetrates through and is rotatably connected to the box body, the middle part of the power input shaft is meshed with the gear set through the driving teeth, and the power output end of the power input shaft is made into the stepped shaft; the stepped shaft comprises a first-stage stepped shaft 11, a second-stage stepped shaft 12, a third-stage stepped shaft 13, a fourth-stage stepped shaft 14 and a fifth-stage stepped shaft 15 which are coaxially and fixedly arranged from the middle part of the power output shaft to the end part of the power input shaft in sequence and have diameters reduced in sequence.
Moreover, an inner ring seat of the deep groove ball bearing 5 is fixedly sleeved on the circumferential outer wall of the secondary stepped shaft; an outer ring seat of the deep groove ball bearing is fixedly clamped inside the transparent cover, one end of the deep groove ball bearing is limited by the axial end face of the first-stage stepped shaft, and the other end of the deep groove ball bearing is limited by the axial direction of the rear end cover of the power input shaft.
And, the seal cover is equipped with inner frame rubber oil blanket 7 on the circumference outer wall of tertiary stepped shaft, and this inner frame rubber oil blanket's circumference outer wall roof pressure supports on the circumference inner wall of power input shaft rear end cap.
And the periphery of the four-stage stepped shaft is provided with a plurality of involute splines 17 which axially extend and are circumferentially and uniformly distributed, and the four-stage stepped shaft is circumferentially limited and connected with the parking brake bottom plate assembly through the involute splines.
Moreover, the periphery of the five-stage stepped shaft is provided with external threads 16, and the five-stage stepped shaft axially penetrates through the parking brake drum assembly and is connected with a fixing nut 9; one end of the fixing nut axially limits and supports the parking brake drum assembly.
Additionally, the utility model discloses preferred, parking braking bottom plate assembly and parking brake drum assembly all adopt the ripe product among the prior art.
To more clearly illustrate the embodiments of the present invention, an example is provided below:
the utility model discloses a vehicle front reduction gear with parking braking function, in order to install the parking brake assembly (including parking braking chassis assembly and parking brake drum assembly) in the rear end of reduction gear power input shaft, specially change the power input shaft, namely, according to the actual structure of parking brake, lengthen the power input shaft and make involute external splines at its rear end to cooperate with the internal splines of parking brake drum assembly;
in order to install the parking brake assembly at the rear end of the power input shaft of the speed reducer, the rear end cover of the power input shaft is changed from a blank cover into a transparent cover;
in order to install the parking brake assembly at the rear end of the power input shaft of the speed reducer and ensure that gear oil in a speed reducer box body does not leak into the special parking brake, an open deep groove ball bearing at the rear end of the power input shaft of the speed reducer in the prior art is changed into a deep groove ball bearing axially limited by a rear end cover, and a transparent cover is installed outwards; meanwhile, an inner framework rubber oil seal is added in the newly-modified rear end cover of the power input shaft;
the parking brake is a drum brake and consists of a parking brake bottom plate assembly, a parking brake drum assembly and a parking brake cable assembly. The parking brake bottom plate assembly is fixed on the outer end face of the rear end cover of the power input shaft through a spring washer and a hexagon head bolt, and the parking brake drum assembly is sleeved on an involute spline at the rear end of the power input shaft of the speed reducer through an internal spline in the parking brake drum assembly and is locked by a flat washer and a fixing nut.
The parts of the utility model which are not described all adopt the mature products and the mature technical means in the prior art.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
Claims (6)
1. A vehicle front-mounted speed reducer with a parking braking function comprises a box body, a power output shaft, a power input shaft and a speed reduction gear set, wherein the inside of the box body is rotatably connected with the power output shaft, the power input shaft and the speed reduction gear set, and the power input shaft transmits rotary power to the power output shaft through the speed reduction gear set; the method is characterized in that: a transparent cover is fixedly arranged on the side wall of the box body, an input shaft rear end cover is coaxially and fixedly connected to the outside of the transparent cover, and a parking brake bottom plate assembly is coaxially and fixedly connected to the outside of the input shaft rear end cover; one end of the power input shaft sequentially and axially penetrates through the transparent cover, the rear end cover and the parking brake bottom plate assembly, and a parking brake drum assembly which is matched with the parking brake bottom plate assembly for braking is coaxially and fixedly arranged on the power input shaft at the end.
2. The front retarder for vehicle with parking brake function according to claim 1, characterized in that: the power input shaft is a stepped shaft, the power input end of the power input shaft penetrates through and is rotatably connected to the box body, the middle part of the power input shaft is meshed with the gear set through the driving teeth, and the power output end of the power input shaft is made into the stepped shaft; the stepped shaft comprises a first-stage stepped shaft, a second-stage stepped shaft, a third-stage stepped shaft, a fourth-stage stepped shaft and a fifth-stage stepped shaft which are sequentially coaxially and fixedly installed from the middle part of the power output shaft to the end part of the power input shaft, and the diameters of the first-stage stepped shaft, the second-stage stepped shaft, the third-stage stepped shaft, the fourth-stage stepped shaft and the fifth-stage stepped shaft are sequentially reduced.
3. The front retarder for vehicle with parking brake function according to claim 2, characterized in that: an inner ring seat of the deep groove ball bearing is fixedly sleeved on the circumferential outer wall of the secondary stepped shaft; the outer ring seat of the deep groove ball bearing is fixedly clamped inside the transparent cover, one end of the deep groove ball bearing is limited by the axial end face of the first-stage stepped shaft, and the other end of the deep groove ball bearing is limited by the axial direction of the rear end cover of the input shaft.
4. The front retarder for vehicle with parking brake function according to claim 2, characterized in that: an inner framework rubber oil seal is hermetically sleeved on the circumferential outer wall of the third-stage stepped shaft, and the circumferential outer wall of the inner framework rubber oil seal is supported on the circumferential inner wall of the rear end cover of the input shaft in a jacking mode.
5. The front retarder for vehicle with parking brake function according to claim 2, characterized in that: the periphery of the four-stage stepped shaft is provided with a plurality of involute splines which extend axially and are uniformly distributed in the circumferential direction, and the four-stage stepped shaft is connected with the parking brake bottom plate assembly in a circumferential limiting manner through the involute splines.
6. The front retarder for vehicle with parking brake function according to claim 2, characterized in that: external threads are formed on the periphery of the five-stage stepped shaft, and the five-stage stepped shaft axially penetrates through the parking brake drum assembly and is connected with a fixing nut; and one end of the fixing nut axially limits and supports the parking brake drum assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023216736.2U CN214197176U (en) | 2020-12-28 | 2020-12-28 | Automobile-used leading reduction gear with parking braking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023216736.2U CN214197176U (en) | 2020-12-28 | 2020-12-28 | Automobile-used leading reduction gear with parking braking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214197176U true CN214197176U (en) | 2021-09-14 |
Family
ID=77629812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023216736.2U Active CN214197176U (en) | 2020-12-28 | 2020-12-28 | Automobile-used leading reduction gear with parking braking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214197176U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451106A (en) * | 2022-09-29 | 2022-12-09 | 赛力斯集团股份有限公司 | Transmission assembly |
-
2020
- 2020-12-28 CN CN202023216736.2U patent/CN214197176U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115451106A (en) * | 2022-09-29 | 2022-12-09 | 赛力斯集团股份有限公司 | Transmission assembly |
| CN115451106B (en) * | 2022-09-29 | 2024-04-23 | 赛力斯集团股份有限公司 | Transmission assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106864251B (en) | Wheel motor drive device | |
| CN108146145B (en) | Electric wheel with large-gear-ratio planetary reducer and vehicle | |
| CN111030350B (en) | Integrated central charging and discharging electric hub | |
| CN108128143A (en) | A kind of integrated electric driving wheel and vehicle | |
| CN111873791A (en) | Integrated electric wheel and vehicle | |
| CN214197176U (en) | Automobile-used leading reduction gear with parking braking function | |
| CN113561762A (en) | Integrated integrated hub motor driving device | |
| CN113492669A (en) | Electric wheel and vehicle | |
| CN213167706U (en) | Wheel-side motor-driven automobile drive axle assembly | |
| CN108128141B (en) | Force transmission method of electric wheel and vehicle using same | |
| CN206394359U (en) | A kind of hub assembly | |
| CN108146144A (en) | It is a kind of for the hub unit of Electric Motor Wheel, Electric Motor Wheel and vehicle | |
| CN207359980U (en) | A kind of spline couples drive-type front hub of vehicle assembly | |
| CN209813626U (en) | Speed reducer for new energy electric drive axle | |
| CN104708991A (en) | Wheel hub assembly and car | |
| CN113580848A (en) | Axle box integral type transaxle | |
| CN110654231B (en) | Wheel limit actuating system and vehicle that has it | |
| CN113291151A (en) | Drive axle of integrated input shaft position variable reduction gearbox for snow sweeper | |
| CN105751886A (en) | New energy automobile hub motor power assembly driving system | |
| CN101105212A (en) | Gear box with built-in braking system | |
| CN2555176Y (en) | Duplex axle for heavy lorry | |
| CN110341465A (en) | A kind of automobile-used two grades of speed change integrated electric wheel drive units and the automobile containing the driving unit | |
| CN214689028U (en) | Heavy independent suspension door type drive axle wheel limit structure | |
| CN110154735A (en) | A kind of Electric Motor Wheel and vehicle | |
| CN215970951U (en) | Axle box integral type transaxle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |