CN219062380U - Transfer case without gear shifting fork mechanism - Google Patents
Transfer case without gear shifting fork mechanism Download PDFInfo
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- CN219062380U CN219062380U CN202223539405.1U CN202223539405U CN219062380U CN 219062380 U CN219062380 U CN 219062380U CN 202223539405 U CN202223539405 U CN 202223539405U CN 219062380 U CN219062380 U CN 219062380U
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- front axle
- oil
- axle output
- output shaft
- input shaft
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Abstract
The utility model discloses a transfer case without a shift fork mechanism, which comprises a case body, an input shaft, an intermediate shaft and an output shaft, wherein the output shaft comprises a rear axle output shaft and a front axle output shaft, the front axle output shaft is connected with the rear axle output shaft through a clutch structure, a shift sliding sleeve is arranged on the input shaft, a hollow cavity is arranged in the input shaft, a shift sliding sleeve connecting pin is fixed on the shift sliding sleeve, the shift sliding sleeve connecting pin can penetrate through the hollow cavity in the axial direction of the input shaft in a sliding way, a piston chamber is arranged in the hollow cavity, a shift piston is arranged in the piston chamber, the shift piston is connected with the shift sliding sleeve connecting pin through a shift piston rod, and the piston chamber is connected with a first oil supply mechanism. According to the utility model, the shifting fork is removed, the actuating mechanism of the shifting sliding sleeve is changed into an actuating mechanism of an oil cylinder which is arranged in the input shaft and is pushed by the actuating device to be in the center of the input shaft, so that spiral motion is not generated, and the gear-releasing phenomenon is fundamentally eliminated.
Description
Technical Field
The utility model relates to the technical field of automobile chassis, in particular to a transfer case.
Background
The utility model provides a traditional truck transfer case as shown in fig. 1, includes box, input shaft, jackshaft and output shaft, and the output shaft includes rear axle output shaft and front axle output shaft, and the front axle output shaft passes through clutch structure and rear axle output shaft, is provided with the shift sliding sleeve on the input shaft, is equipped with the shift sliding sleeve on the input shaft, and the shift sliding sleeve is shifted through the shift fork and is shifted. The high-low gear speed conversion and the front axle engagement and disengagement are realized by taking compressed air provided by an automobile air compressor as power to push an air cylinder, and the air cylinder pushes a shifting fork to perform gear shifting or front drive engagement and disengagement. The conventional structure has the following problems in the actual use process;
out of gear problem: because the shift fork is in the in-process of stirring the shift sliding sleeve, can appear the shift fork and shift sliding sleeve and be not in same axis, can produce certain inclination, produce certain helix, cause certain axis motion to promote shift sliding sleeve motion and cause the gear release.
Disassembly problems of assembly and maintenance: in the assembly and disassembly process, the box body needs to be compactly arranged, so that the assembly process mainly occurs in maintenance and disassembly, and the shifting fork shaft are damaged due to the fact that the shifting fork is clamped in the middle and a certain disassembly difficulty problem occurs.
Wear of the shifting fork: because of the high speed operation, the shifting fork and the shifting sliding sleeve are mutually worn, and the shifting fork or the shifting sliding sleeve needs to be replaced periodically.
Disclosure of Invention
The utility model aims at: a transfer case without a shift fork mechanism is provided.
In order to achieve the above purpose, the transfer case without the shift fork mechanism comprises a case body, an input shaft, an intermediate shaft and an output shaft, wherein the output shaft comprises a rear axle output shaft and a front axle output shaft, the front axle output shaft is connected with the rear axle output shaft through a clutch structure, a shift sliding sleeve is arranged on the input shaft, a hollow cavity is arranged in the input shaft, a shift sliding sleeve connecting pin is fixed on the shift sliding sleeve, the shift sliding sleeve connecting pin can penetrate through the hollow cavity in a sliding manner along the axial direction of the input shaft, a piston chamber is arranged in the hollow cavity, a shift piston is arranged in the piston chamber, the shift piston is connected with the shift sliding sleeve connecting pin through a shift piston rod, and the piston chamber is connected with a first oil supply mechanism.
Preferably, the piston chamber is connected with a high-gear oil port and a low-gear oil port, the high-gear oil port and the low-gear oil port are positioned on two sides of the gear shifting piston, the high-gear oil port and the low-gear oil port are connected with a first oil supply mechanism, the first oil supply mechanism controls the high-gear oil port to feed oil and the low-gear oil port to discharge oil so as to switch the gear shifting sliding sleeve to a high-speed gear, and the first oil supply mechanism controls the high-gear oil port to discharge oil and the low-gear oil port to feed oil so as to switch the gear shifting sliding sleeve to a low-speed gear.
Preferably, the first oil supply mechanism is connected with the high-gear oil port and the low-gear oil port through a flow dividing reversing valve.
Preferably, the shifting piston is connected with a return spring.
Preferably, the input shaft is arranged in the input shaft bearing seat, the high-gear oil port and the low-gear oil port are arranged on the outer wall of the input shaft bearing seat, two oil passages are arranged on the input shaft and the input shaft bearing seat, the piston chamber is respectively communicated with the high-gear oil port and the low-gear oil port through the two oil passages, and a gear shifting oil sealing ring is arranged between the input shaft and the input shaft bearing seat and positioned on two sides of the two oil passages.
Preferably, the gear shifting oil sealing ring is held between the input shaft and the input shaft bearing seat through a gear shifting sealing ring seat.
Preferably, the rear axle output shaft and the front axle output shaft rotate to be connected, the clutch structure include front axle output meshing cover and set up the meshing tooth on the rear axle output shaft, be provided with hollow cavity in the front axle output shaft, be fixed with front axle meshing cover connecting pin on the front axle output meshing cover, the axial sliding of front axle output shaft is followed to front axle meshing cover connecting pin runs through in hollow cavity, is provided with the piston chamber in the cavity, is provided with front axle output piston in the piston chamber, front axle output piston connection front axle meshing cover connecting pin, the piston chamber connect second oil feeding mechanism.
Preferably, the front axle meshing sleeve connecting pin is connected with a return spring.
Preferably, the front axle output shaft is arranged in a front axle output bearing seat, a front axle clutch oil port is arranged on the outer wall of the front axle output bearing seat, front axle oil channels which are communicated with the front axle clutch oil port and a piston chamber of the front axle output shaft are arranged on the front axle output shaft and the front axle output bearing seat, and front axle output oil sealing rings are respectively arranged between the front axle output shaft and the front axle output bearing seat and on two sides of the front axle oil channels.
Preferably, the front axle output oil liquid sealing ring is kept between the front axle output shaft and the front axle output bearing seat through the front axle output sealing ring seat.
The utility model has the beneficial effects that: according to the utility model, the shifting fork is removed, the actuating mechanism of the shifting sliding sleeve is changed into an actuating mechanism of an oil cylinder which is arranged in the input shaft and is pushed by the actuating device to be in the center of the input shaft, so that spiral motion is not generated, and the gear-releasing phenomenon is fundamentally eliminated. Because parts such as a shifting fork, a shifting fork shaft and a sliding block are not needed, interference phenomenon can not occur in the assembly process. The disassembly and assembly efficiency is improved. Because the shifting fork and the shifting fork shaft are omitted, the manufacturing cost is reduced. While providing a larger layout space for the designer.
Drawings
FIG. 1 is a schematic diagram of a prior art transfer case;
FIG. 2 is a schematic diagram of the structure of the present utility model;
in the figure: 1. the hydraulic transmission device comprises a high gear oil port, a low gear oil port, a 3 input shaft bearing seat, a 4 gear shifting sealing ring seat, a 5 gear shifting oil sealing ring, a 6 input shaft, a 7 gear shifting piston, a 8 return spring, a 9 supporting seat, a 10 gear shifting piston rod, a 11 high gear, a 12 gear shifting sliding sleeve connecting pin, a 13 gear shifting sliding sleeve, a 14 gear shifting sliding sleeve, a 15 gear shifting low gear, a 15 front axle clutch oil port, a 16 front axle output bearing seat, a 17 front axle output oil sealing ring, a 18 front axle output sealing ring seat, a 19 front axle output piston, a 20 front axle meshing sleeve connecting pin, a 21 return spring, a 22 front axle output meshing sleeve, a 23 front axle output shaft, a 24 rear axle output shaft, a 25 intermediate shaft, a 26, a first oil supply mechanism, a 27, a split reversing valve, a 28 and a second oil supply mechanism.
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 transfer case without the shift fork mechanism shown in fig. 2 comprises a case body, an input shaft 6, an intermediate shaft 25 and an output shaft, wherein the output shaft comprises a rear axle output shaft 24 and a front axle output shaft 23, the front axle output shaft 23 is connected with the rear axle output shaft 24 through a clutch structure, a shift sliding sleeve 13 is arranged on the input shaft 6, and a high gear 11 and a low gear 14 are respectively arranged on two sides of the shift sliding sleeve 13 on the input shaft 6.
The input shaft 6 is arranged in the input shaft bearing seat 3, a hollow cavity is arranged in the input shaft 6, a gear shifting sliding sleeve connecting pin 12 is fixed on a gear shifting sliding sleeve 13, the gear shifting sliding sleeve connecting pin 12 can slide along the axial direction of the input shaft 6 and penetrates through the hollow cavity, a piston chamber is arranged in the hollow cavity, a gear shifting piston 7 is arranged in the piston chamber, the gear shifting piston 7 is connected with the gear shifting sliding sleeve connecting pin 12 through a gear shifting piston rod 10, the gear shifting piston 7 is connected with a return spring 8, a supporting seat 9 is fixedly arranged in the piston chamber, and the return spring 8 is connected with the supporting seat 9.
The piston chamber is connected with a high-gear oil port 1 and a low-gear oil port 2, the high-gear oil port and the low-gear oil port are positioned on two sides of a gear shifting piston 7, the high-gear oil port 1 and the low-gear oil port 2 are arranged on the outer wall of an input shaft bearing seat 3, two oil channels are arranged on an input shaft 6 and the input shaft bearing seat 3, the piston chamber is respectively communicated with the high-gear oil port 1 and the low-gear oil port 2 through the two oil channels, and a gear shifting oil sealing ring 5 is arranged between the input shaft 6 and the input shaft bearing seat 3 and positioned on two sides of the two oil channels. The shift oil seal ring 5 is held between the input shaft 6 and the input shaft bearing housing 3 by a shift seal ring seat 4.
The high-gear oil port 1 and the low-gear oil port 2 are connected with a first oil supply mechanism 26, the first oil supply mechanism 26 controls the high-gear oil port 1 to feed oil to the low-gear oil port 2 to discharge oil so as to switch the gear shift sliding sleeve 13 to a high-gear position, and the first oil supply mechanism 26 controls the high-gear oil port 1 to discharge oil to the low-gear oil port 2 to feed oil so as to switch the gear shift sliding sleeve 13 to a low-gear position. The first oil supply mechanism 26 is connected with the high-gear oil port 1 and the low-gear oil port 2 through a flow dividing reversing valve 27.
The rear axle output shaft 24 and the front axle output shaft 23 are rotationally connected, the front axle output shaft 23 is arranged in the front axle output bearing seat 16, the clutch structure comprises a front axle output meshing sleeve 22 and meshing teeth arranged on the rear axle output shaft, a hollow cavity is arranged in the front axle output shaft 23, a front axle meshing sleeve connecting pin 20 is fixed on the front axle output meshing sleeve 22, the front axle meshing sleeve connecting pin 20 can penetrate through the hollow cavity in a sliding way along the axial direction of the front axle output shaft 23, a piston chamber is arranged in the hollow cavity, a front axle output piston 19 is arranged in the piston chamber, the front axle output piston 19 is connected with the front axle meshing sleeve connecting pin 20, and the front axle meshing sleeve connecting pin 20 is connected with a return spring 21.
The outer wall of the front axle output bearing seat 16 is provided with a front axle clutch oil port 15, front axle output shafts 23 and the front axle output bearing seat 16 are provided with front axle oil passages which are communicated with the front axle clutch oil port 15 and a piston chamber of the front axle output shafts 23, front axle output shafts 23 and the front axle output bearing seat 16 are respectively provided with front axle output oil seal rings 17 which are positioned on two sides of the front axle oil passages, and the front axle output oil seal rings 17 are kept between the front axle output shafts 23 and the front axle output bearing seat 16 through front axle output seal ring seats 18. The front axle clutch oil port 15 is connected with a second oil supply mechanism 28.
Working principle: the first oil supply mechanism 26 is used for feeding oil to the low-gear oil port 2 of the high-gear oil port 1, pushing the gear shifting piston 7 to move leftwards, enabling the gear shifting sliding sleeve 13 to be meshed with the high-gear 11, switching to a high-gear position, feeding oil to the low-gear oil port 2 of the high-gear oil port 1 through the first oil supply mechanism 26, pushing the gear shifting piston 7 to move rightwards, enabling the gear shifting sliding sleeve 13 to be meshed with the low-gear 14, and switching to the low-gear position.
The second oil supply mechanism 28 supplies oil to the clutch oil port of the front axle to push the output piston 19 of the front axle to move rightwards, so that the output meshing sleeve 22 of the front axle is meshed with meshing teeth arranged on the output shaft of the rear axle, and the output shaft 23 of the front axle is connected with driving force.
The first oil supply mechanism 26 and the second oil supply mechanism 28 are pneumatic oil supply mechanisms.
Compared with FIG. 1, the technical improvement scheme of the embodiment
The power is improved from cylinder pushing to gas-liquid pressurizing pushing;
removing the shifting fork, and changing the actuating mechanisms of the shifting fork shaft and the sliding block into oil cylinder actuating mechanisms for pushing the input shaft and the output shaft;
one ends of the input shaft and the output shaft are provided with oil liquid rotary sealing rings to provide hydraulic power for the in-shaft actuating mechanism;
the reason for changing the gas into the oil is that the sealing ring is not lubricated in the use process, so that the sealing element is damaged when the sealing element rotates at high height, and the sealing element is quickly failed. After the air pushing oil is changed, the lubrication condition is improved, and the service life of the machine part is basically prolonged.
Effects after improvement
Since the actuator push is in the center of the input shaft, there is no helical movement. Eliminating the gear-releasing phenomenon fundamentally.
Because parts such as a shifting fork, a shifting fork shaft and a sliding block are not needed, interference phenomenon can not occur in the assembly process. The disassembly and assembly efficiency is improved.
Because the shifting fork and the shifting fork shaft are omitted, the manufacturing cost is reduced. While providing a larger layout space for the designer.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a transfer case of no shift fork mechanism of shifting, includes box, input shaft, jackshaft and output shaft, and the output shaft includes rear axle output shaft and front axle output shaft, and front axle output shaft passes through clutch structure and rear axle output shaft, is provided with the sliding sleeve of shifting on the input shaft, its characterized in that: the gear shifting device is characterized in that a hollow cavity is formed in the input shaft, a gear shifting sliding sleeve connecting pin is fixed on the gear shifting sliding sleeve, the gear shifting sliding sleeve connecting pin can penetrate through the hollow cavity in a sliding mode along the axial direction of the input shaft, a piston chamber is formed in the hollow cavity, a gear shifting piston is arranged in the piston chamber, the gear shifting piston is connected with the gear shifting sliding sleeve connecting pin through a gear shifting piston rod, and the piston chamber is connected with a first oil supply mechanism.
2. The transfer case without shift fork mechanism of claim 1, wherein: the piston chamber be connected with high oil retaining port and low oil retaining port, high oil retaining port and low oil retaining port are located the both sides of shifting the piston, high oil retaining port and low oil retaining port connect first oil feed mechanism, first oil feed mechanism control high oil retaining port advances oil low oil retaining port and goes out oil and shift the sliding sleeve and switch to high-speed gear, first oil feed mechanism control high oil retaining port goes out oil low oil retaining port advances oil and shifts the sliding sleeve to low-speed gear.
3. The transfer case without shift fork mechanism of claim 2, wherein: the first oil supply mechanism is connected with the high-gear oil port and the low-gear oil port through a flow dividing reversing valve.
4. The transfer case without shift fork mechanism of claim 1, wherein: and the gear shifting piston is connected with a return spring.
5. The transfer case without shift fork mechanism of claim 1, wherein: the input shaft set up in the input shaft bearing frame, high oil port and low oil port setting are on the outer wall of input shaft bearing frame, are provided with two oil ducts on input shaft and the input shaft bearing frame, the piston room communicates high oil port and low oil port through two oil ducts respectively, and input shaft bearing frame between and lie in two oil duct both sides and all are provided with the fluid sealing ring of shifting.
6. The shift fork mechanism-less transfer case of claim 5, wherein: the gear shifting oil sealing ring is kept between the input shaft and the input shaft bearing seat through a gear shifting sealing ring seat.
7. The shift fork mechanism-free transfer case of any one of claims 1-6, wherein: the clutch structure comprises a front axle output meshing sleeve and meshing teeth arranged on the rear axle output shaft, a hollow cavity is arranged in the front axle output shaft, a front axle meshing sleeve connecting pin is fixedly arranged on the front axle output meshing sleeve, the front axle meshing sleeve connecting pin can penetrate through the hollow cavity in a sliding mode along the axial direction of the front axle output shaft, a piston chamber is arranged in the hollow cavity, a front axle output piston is arranged in the piston chamber, the front axle output piston is connected with the front axle meshing sleeve connecting pin, and the piston chamber is connected with a second oil supply mechanism.
8. The shift fork mechanism-less transfer case of claim 7, wherein: the front axle meshing sleeve connecting pin is connected with a return spring.
9. The shift fork mechanism-less transfer case of claim 7, wherein: the front axle output shaft is arranged in a front axle output bearing seat, a front axle clutch oil port is arranged on the outer wall of the front axle output bearing seat, front axle oil channels which are communicated with the front axle clutch oil port and a piston chamber of the front axle output shaft are arranged on the front axle output shaft and the front axle output bearing seat, and front axle output oil sealing rings are respectively arranged between the front axle output shaft and the front axle output bearing seat and positioned on two sides of the front axle oil channels.
10. The shift fork mechanism-less transfer case of claim 9, wherein: the front axle output oil liquid sealing ring is kept between the front axle output shaft and the front axle output bearing seat through the front axle output sealing ring seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539405.1U CN219062380U (en) | 2022-12-29 | 2022-12-29 | Transfer case without gear shifting fork mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223539405.1U CN219062380U (en) | 2022-12-29 | 2022-12-29 | Transfer case without gear shifting fork mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219062380U true CN219062380U (en) | 2023-05-23 |
Family
ID=86370297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223539405.1U Active CN219062380U (en) | 2022-12-29 | 2022-12-29 | Transfer case without gear shifting fork mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219062380U (en) |
-
2022
- 2022-12-29 CN CN202223539405.1U patent/CN219062380U/en active Active
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