Two-gear middle-mounted four-wheel drive transfer case

Abstract

The utility model discloses a two-gear centrally-mounted four-wheel drive transfer case which comprises a case body, an upper rocker arm is fixedly connected to the case body, a shifting fork shaft A and a transmission large gear are arranged in the case body, a shifting fork A is fixedly connected to the shifting fork shaft A, a gear drum is arranged at the end, away from the shifting fork shaft A, of the shifting fork A, a low-speed driving gear is arranged on the right side of the gear drum, and a transmission large gear is arranged on the transmission large gear. An input shaft is fixedly connected to the low-speed driving gear, a gear shifting clutch gear is arranged in the box body, and a time-sharing four-wheel-drive intermediate shaft is meshed with the lower portion of the gear shifting clutch gear. The utility model has wide application range, can separate the four-wheel drive of the front axle and the rear axle, can more flexibly cope with the conditions of no-load high speed, heavy load low speed and the like, and can realize more flexible and gentle power transmission by adding the device under the condition of insufficient reduction ratio; meanwhile, the device is smaller in size, small in occupied space and convenient to install and refit.

Description

Technical Field

[0001] This utility model relates to the field of transfer case technology, specifically a two-speed, mid-mounted, four-wheel drive transfer case. Background Technology

[0002] A transfer case is a device that distributes the engine's power. It can output power to the rear axle or simultaneously to the front and rear axles. With the development of four-wheel drive technology, transfer cases have also been constantly changing, gradually forming transfer cases with different styles to match four-wheel drive vehicles with different needs. Their basic principles and functions are also different.

[0003] The existing two-speed mid-mounted four-wheel drive transfer case is not only bulky and inconvenient to install, but also cannot flexibly and efficiently convert the transmission ratio. Utility Model Content

[0004] The purpose of this utility model is to provide a two-speed, mid-mounted four-wheel drive transfer case, which has a wide range of applications. It can separate the front and rear axles for four-wheel drive, and can more flexibly cope with situations such as high speed under no-load and low speed under heavy load. It can also achieve more flexible and smooth power transmission by adding a device when the reduction ratio is insufficient. At the same time, this utility model is smaller in size, occupies less space, and is easy to install and modify.

[0005] To achieve the above objectives, a two-speed mid-mounted four-wheel drive transfer case is provided, comprising: a case body, an upper rocker arm fixedly connected to the case body, a shift fork shaft A and a transmission gear inside the case body, a shift fork A fixedly connected to the shift fork shaft A, a gear drum at the end of the shift fork A away from the shift fork shaft A, a low-speed drive gear on the right side of the gear drum, an input shaft fixedly connected to the low-speed drive gear, a shift clutch gear inside the case body, a part-time four-wheel drive intermediate shaft meshing below the shift clutch gear, a secondary gear fixedly connected to the part-time four-wheel drive intermediate shaft, a primary gear meshing below the secondary gear, a gear ring on the left side of the primary gear, a main output shaft rotatably connected inside the case body, a high-speed driven gear inside the case body, an inner intermediate shaft fixedly connected to the high-speed driven gear, a spacer sleeve fitted on the circumferential surface of the inner intermediate shaft, and the inner intermediate shaft... A low-speed driven gear is fixedly connected to the circumference of the housing. A housing cover is fixedly connected to the housing body, and a bearing seat is fixedly connected to the housing cover. A power take-off output shaft is rotatably connected inside the housing body, and a second connecting plate is fixedly connected to the power take-off output shaft. A housing bottom is fixedly connected to the top of the housing body. A shift fork shaft B is rotatably connected inside the housing body. A shift fork B is fixedly connected to the circumference of the shift fork shaft B. A lower steel ball is engaged on the circumference of the shift fork shaft B. A lower spring is engaged at the end of the lower steel ball away from the shift fork shaft B. A bolt is provided at the end of the lower spring away from the lower steel ball, and the bolt is threadedly connected to the housing body. A rotating rocker arm is rotatably connected to the housing body, and a bent rocker arm is fixedly connected to the rotating rocker arm. A plug is fixedly connected to the housing body. An upper spring is provided inside the housing body, and an upper steel ball is engaged at one end of the upper spring. A rocker arm bracket is fixedly connected to the housing body, and an air outlet is fixedly connected to the housing body.

[0006] According to the aforementioned two-speed mid-mounted four-wheel drive transfer case, the upper steel ball is engaged with the circumferential surface of the shift fork shaft A, and the rocker arm bracket is fixedly connected to the upper rocker arm.

[0007] According to the aforementioned two-speed mid-mounted four-wheel drive transfer case, a connecting disc is fixedly connected to both the input shaft and the main output shaft. The input shaft and the main output shaft are located on the same axis, and the shift clutch gear is located between the input shaft and the main output shaft.

[0008] According to the aforementioned two-speed mid-mounted four-wheel drive transfer case, the main output shaft is fixedly connected to the transmission gear.

[0009] According to the aforementioned two-speed mid-mounted four-wheel drive transfer case, the rotating rocker arm is rotatably connected to the shift fork shaft B.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention has a wide range of applications. It can separate the front and rear axles for four-wheel drive, and can more flexibly cope with situations such as high speed under no load and low speed under heavy load. It can also achieve more flexible and smooth power transmission by adding a device when the reduction ratio is insufficient. At the same time, this invention is smaller in size, occupies less space, and is easy to install and modify.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is a cross-sectional view of a two-speed, mid-mounted four-wheel drive transfer case according to the present invention.

[0015] Figure 2 for Figure 1 Cross-sectional view of AA in the middle;

[0016] Figure 3 for Figure 1 Cross-sectional view of BB in the middle;

[0017] Figure 4 for Figure 1 Cross-sectional view of CC.

[0018] In the diagram: 1. Shift fork shaft A; 2. Upper rocker arm; 3. Transmission large gear; 4. Shift fork A; 5. Gear drum; 6. Low-speed drive gear; 7. Input shaft; 8. No. 1 connecting plate; 9. Shift clutch gear; 10. Part-time four-wheel drive intermediate shaft; 11. Secondary gear; 12. Primary gear; 13. Gear ring; 14. Main output shaft; 15. High-speed driven gear; 16. Spacer; 17. Inner intermediate shaft; 18. Low-speed driven gear; 19. Housing cover; 20. Bearing seat; 21. No. 2 connecting plate; 22. Power take-off output shaft; 23. Housing bottom; 24. Shift fork shaft B; 25. Shift fork B; 26. Bolt; 27. Lower spring; 28. Lower steel ball; 29. ​​Rotating rocker arm; 31. Bent rocker arm; 32. Plug; 33. Rocker arm bracket; 34. Upper spring; 35. Upper steel ball; 36. Air outlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 This utility model provides a technical solution: a two-speed mid-mounted four-wheel drive transfer case, comprising: a case body, an upper rocker arm 2 fixedly connected to the case body, a shift fork shaft A1 and a transmission gear 3 disposed inside the case body, a shift fork A4 fixedly connected to the shift fork shaft A1, a gear drum 5 disposed at the end of the shift fork A4 away from the shift fork shaft A1, a low-speed drive gear 6 disposed on the right side of the gear drum 5, an input shaft 7 fixedly connected to the low-speed drive gear 6, a shift clutch gear 9 disposed inside the case body, a part-time four-wheel drive intermediate shaft 10 meshing below the shift clutch gear 9, and a secondary gear 11 fixedly connected to the part-time four-wheel drive intermediate shaft 10. Below the secondary gear 11, a primary gear 12 meshes. A gear ring 13 is located on the left side of the primary gear 12. A main output shaft 14 is rotatably connected inside the housing, and the main output shaft 14 is fixedly connected to the transmission large gear 3. A high-speed driven gear 15 is located inside the housing, and an inner intermediate shaft 17 is fixedly connected to the high-speed driven gear 15. A spacer 16 is fitted onto the circumference of the inner intermediate shaft 17, and a low-speed driven gear 18 is fixedly connected to the circumference of the inner intermediate shaft 17. A housing cover 19 is fixedly connected to the housing, and a bearing seat 20 is fixedly connected to the housing cover 19. A power take-off output shaft 22 is rotatably connected inside the housing. A second connecting plate 21 is fixedly connected to the output shaft 22. The power take-off output shaft 22 is fixedly connected to the front axle power output end through the second connecting plate 21. A housing bottom 23 is fixedly connected to the upper part of the housing. A shift fork shaft B24 is rotatably connected inside the housing. A shift fork B25 is fixedly connected to the circumferential surface of the shift fork shaft B24. A lower steel ball 28 is engaged on the circumferential surface of the shift fork shaft B24. A lower spring 27 is engaged at the end of the lower steel ball 28 away from the shift fork shaft B24. A bolt 26 is provided at the end of the lower spring 27 away from the lower steel ball 28. The bolt 26 is threadedly connected to the housing. A rotating rocker arm 29 is rotatably connected to the housing. 29 is rotatably connected to the shift fork shaft B24. A curved rocker arm 31 is fixedly connected to the rotating rocker arm 29. The curved rocker arm 31 pushes the rotating rocker arm 29, which in turn pushes the shift fork shaft B24, which in turn pushes the shift fork B25, which in turn pushes the gear ring 13 to engage and disengage with the first-stage gear 12 to switch between two-wheel drive and four-wheel drive. A plug 32 is fixedly connected to the housing. An upper spring 34 is installed inside the housing. One end of the upper spring 34 is engaged with an upper steel ball 35. The upper steel ball 35 is engaged with the circumferential surface of the shift fork shaft A1. A rocker arm bracket 33 is fixedly connected to the upper rocker arm 2. A rocker arm bracket 33 is fixedly connected to the housing. An air outlet 36 is fixedly connected to the housing.

[0021] A No. 1 connecting plate 8 is fixedly connected to both the input shaft 7 and the main output shaft 14. The input shaft 7 and the main output shaft 14 are located on the same axis, and the shift clutch gear 9 is located between the input shaft 7 and the main output shaft 14. The input shaft 7 is fixedly connected to the engine power input shaft through the No. 1 connecting plate 8, and the main output shaft 14 is fixedly connected to the rear axle power output through the No. 1 connecting plate 8.

[0022] Working principle: The upper rocker arm 2 pushes the shift fork shaft A1, which in turn pushes the shift fork A4 to push the shift clutch gear 9 to perform high and low speed switching. The bent rocker arm 31 pushes the rotating rocker arm 29, which in turn pushes the shift fork shaft B24, which in turn pushes the shift fork B25, which in turn pushes the gear ring 13 to engage and disengage with the first-stage gear 12 to switch between two-wheel drive and four-wheel drive.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A two-speed, mid-mounted, four-wheel-drive transfer case, comprising: The housing is characterized in that an upper rocker arm (2) is fixedly connected to the housing, a shift fork shaft A (1) and a transmission gear (3) are provided inside the housing, a shift fork A (4) is fixedly connected to the shift fork shaft A (1), a toothed drum (5) is provided at the end of the shift fork A (4) away from the shift fork shaft A (1), a low-speed drive gear (6) is provided on the right side of the toothed drum (5), an input shaft (7) is fixedly connected to the low-speed drive gear (6), a shift clutch gear (9) is provided inside the housing, and a part-time four-wheel drive intermediate shaft (10) meshes below the shift clutch gear (9). A secondary gear (11) is fixedly connected to the intermediate shaft (10) of the part-time four-wheel drive system. A primary gear (12) meshes with the lower part of the secondary gear (11). A gear ring (13) is provided on the left side of the primary gear (12). A main output shaft (14) is rotatably connected inside the housing. A high-speed driven gear (15) is provided inside the housing. An inner intermediate shaft (17) is fixedly connected to the high-speed driven gear (15). A spacer (16) is sleeved on the circumferential surface of the inner intermediate shaft (17). A low-speed driven gear (18) is fixedly connected to the circumferential surface of the inner intermediate shaft (17). A cover (19) is fixedly connected to the housing, and a bearing seat (20) is fixedly connected to the cover (19). A power take-off shaft (22) is rotatably connected inside the housing, and a second connecting plate (21) is fixedly connected to the power take-off shaft (22). A bottom (23) is fixedly connected to the top of the housing. A shift fork shaft B (24) is rotatably connected inside the housing. A shift fork B (25) is fixedly connected to the circumferential surface of the shift fork shaft B (24). A lower steel ball (28) is engaged on the circumferential surface of the shift fork shaft B (24), and the lower steel ball (28) is away from the shift fork shaft B (24). One end of the box is fitted with a lower spring (27), and the end of the lower spring (27) away from the lower steel ball (28) is fitted with a bolt (26). The bolt (26) is threadedly connected to the box body. A rotating rocker arm (29) is rotatably connected to the box body. A bent rocker arm (31) is fixedly connected to the rotating rocker arm (29). A plug (32) is fixedly connected to the box body. An upper spring (34) is installed inside the box body. One end of the upper spring (34) is fitted with an upper steel ball (35). A rocker arm bracket (33) is fixedly connected to the box body. An air outlet (36) is fixedly connected to the box body.

2. The two-speed mid-mounted four-wheel drive transfer case as described in claim 1, characterized in that: The upper steel ball (35) is engaged with the circumferential surface of the shift fork shaft A (1), and the rocker arm bracket (33) is fixedly connected to the upper rocker arm (2).

3. A two-speed mid-mounted four-wheel drive transfer case as described in claim 1, characterized in that: A connecting disc (8) is fixedly connected to both the input shaft (7) and the main output shaft (14). The input shaft (7) and the main output shaft (14) are located on the same axis, and the shift clutch gear (9) is located between the input shaft (7) and the main output shaft (14).

4. A two-speed, mid-mounted, four-wheel-drive transfer case as described in claim 1, characterized in that: The main output shaft (14) is fixedly connected to the transmission gear (3).

5. A two-speed mid-mounted four-wheel drive transfer case as described in claim 1, characterized in that: The rotating rocker arm (29) is rotatably connected to the fork shaft B (24).

Images