Electric control transfer case gear shifting limiting mechanism
By designing an electronically controlled shift limit mechanism in the transferor, using the combined structure of baffle, limit block, cam and H-L fork assembly, the traditional transferor cannot be replaced due to drag torque when switching between 4L and 4H. The problem of gears has achieved a higher gear shift success rate.
Patent Information
- Application Number
- CN202421489141.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-06-27
AI Technical Summary
When the traditional transferor switches gears from 4L to 4H, due to the drag torque of the automatic transmission, the buffer torsion spring cannot overcome the resistance, resulting in the inability to shift gears normally.
An electronically controlled transfer gear shift limit mechanism is designed, including a guide shaft, an H-L fork assembly and a gear shift shaft assembly, using a combination of baffle plate, limit block, cam, shift shaft, spacer and torsion spring The structure, through the matching contact and rolling of the cam and the spiral groove, drives the limit block to drive the cam to rotate, and combines the displacement of the H-L fork assembly to overcome the drag torque.
It effectively overcomes the drag torque resistance of the automatic transmission and improves the success rate of the transferor 4L to switch 4H gear shifts.
Smart Images
Figure CN222185746U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electric-controlled transfer case shift limit mechanism, belonging to the technical field of automobile transfer case equipment. Background Art
[0002] With the development of the automobile industry, more and more cars are using automatic transmissions. Traditional off-road vehicles or four-wheel drive pickups need to be equipped with transfer cases. When the transfer case switches gears from 4L to 4H, static shifting is required. However, due to the drag torque of the automatic transmission, there will be torque even in neutral. When the transfer case switches from 4L to 4H, the buffer torsion spring cannot overcome the drag torque resistance, resulting in failure to shift gears normally. Utility Model Content
[0003] The utility model aims to provide an electronically controlled transfer case shift limit mechanism, which has a simple structure, effectively overcomes the drag torque resistance of the automatic transmission, improves the transfer case 4L to 4H shift success rate, and solves the above-mentioned problems existing in the background technology.
[0004] The technical solution of the utility model is:
[0005] A shift limit mechanism for an electronically controlled transfer case comprises a guide shaft, an HL shift fork assembly and a shift shaft assembly, wherein the shift shaft assembly comprises a baffle, a limit block, a cam, a shift shaft, a spacer sleeve and a torsion spring, wherein the shift shaft is provided with a cam, a spacer sleeve, a torsion spring and a baffle, wherein the baffle is rigidly connected to the shift shaft, a limit block is provided on the baffle, the cam is rotationally connected to the shift shaft, an end of the cam is matched and in contact with the limit block, and a spiral groove is provided on the cam; the spacer sleeve is arranged on the shift shaft between the baffle and the cam to axially position the baffle and the cam; the torsion spring is installed on the outer side of the spacer sleeve to play a buffering role; the HL shift fork assembly comprises an HL shift fork, a pin and a roller, wherein the HL shift fork is slidably arranged on the guide shaft, the roller is installed on the end of the HL shift fork through a pin, and the roller is rollingly arranged in the spiral groove of the cam; when in use, the shift shaft drives the baffle to rotate, the limit block on the baffle pushes the cam to rotate, the roller rolls in the spiral groove as the cam rotates, and the HL shift fork assembly is displaced on the guide shaft.
[0006] Furthermore, a shift block is provided at the end of the cam, and the shift block is in matching contact with the limit block.
[0007] Furthermore, the limit block is an L-shaped protruding structure, which drives the shift cam to rotate when the transfer case shifts from the 4L gear to the 4H gear, thereby realizing the 4L gear switch.
[0008] Furthermore, a roller mounting seat is provided at the end of the HL fork, an axial hole is provided on the roller mounting seat, the shaft of the roller is arranged in the axial hole, and the roller is mounted on one side of the roller mounting seat through a pin.
[0009] The positive effects of the utility model include simple structure, effective overcoming of the drag torque resistance of the automatic transmission, and improving the shift success rate of the transfer case from 4L to 4H. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 This is a schematic diagram of the baffle and the limit block of the utility model;
[0011] Figure 2 This is a schematic diagram of the shift shaft assembly of the utility model;
[0012] Figure 3 This is a schematic diagram of the HL fork assembly of the utility model;
[0013] Figure 4 This is a schematic diagram of the HL shift fork assembly and the shift shaft assembly of the utility model after assembly;
[0014] In the figure: baffle 1, limit block 2, cam 3, shift shaft 4, spiral groove 5, spacer 6, torsion spring 7, HL shift fork 8, pin 9, roller 10, guide shaft 11, HL shift fork assembly 12, shift shaft assembly 13, roller mounting seat 14, shift block 15. DETAILED DESCRIPTION
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0016] Refer to the attached Figures 1 to 4 , an electronically controlled transfer case shift limit mechanism, comprising a guide shaft 11, an HL shift fork assembly 12 and a shift shaft assembly 13, wherein the shift shaft assembly 13 comprises a baffle 1, a limit block 2, a cam 3, a shift shaft 4, a spacer 6 and a torsion spring 7, wherein the shift shaft 4 is provided with a cam 3, a spacer 6, a torsion spring 7 and a baffle 1, wherein the baffle 1 is rigidly connected to the shift shaft 4, a limit block 2 is provided on the baffle 1, and the limit block 2 is a convex structure, the cam 3 is rotatably connected to the shift shaft 4, the end of the cam 3 is matched and contacted with the limit block 2, and a spiral groove 5 is provided on the cam 3, and the spiral groove 5 has a spiral groove structure; the spacer 6 is arranged between the baffle 1 and the cam 3, and ... The baffle plate 1 is axially positioned with the cam 3; the torsion spring 7 is installed on the outside of the spacer 6; the HL fork assembly 12 comprises an HL fork 8, a pin 9 and a roller 10, the HL fork 8 is slidably arranged on the guide shaft 11, the roller 10 is installed at the end of the HL fork 8 through the pin 9, and the roller 10 is rollingly arranged in the spiral groove 5 of the cam 3; when in use, the shift shaft 4 drives the baffle plate 1 to rotate, the limit block 2 on the baffle plate 1 pushes the cam 3 to rotate, and the roller 10 rolls in the spiral groove 5 as the cam 3 rotates, the HL fork assembly 12 is displaced on the guide shaft 11, and when the roller 10 rolls in the spiral groove 5 on the cam 3, the torsion spring 7 plays a buffering role.
[0017] A shift block 15 is disposed at the end of the cam 3 , and the shift block 15 is in contact with the limit block 2 .
[0018] The limit block 2 is an L-shaped protrusion structure, which drives the shift cam 3 to rotate when the transfer case is shifted from the 4L gear to the 4H gear, thereby realizing the 4L gear shift.
[0019] A roller mounting seat 14 is provided at the end of the HL fork 8 , and an axial hole is provided on the roller mounting seat 14 . The axis of the roller 10 is arranged in the axial hole, and the roller 10 is installed on one side of the roller mounting seat 14 through a pin 9 .
[0020] In this embodiment, when in use, the shift shaft 4 drives the baffle 1 to rotate, the limit block 2 on the baffle 1 pushes the cam 3 to rotate, the roller 10 rolls in the spiral groove 5 as the cam 3 rotates, and the HL fork assembly 12 is displaced on the guide shaft 11. The HL fork assembly 12 is connected to the corresponding gear of the transfer case through a spline sleeve to achieve the switching from L gear to H gear.
Claims
1. An electronically controlled transfer case shift limit mechanism, characterized in that: The invention comprises a guide shaft (11), an HL shift fork assembly (12) and a shift shaft assembly (13); the shift shaft assembly (13) comprises a baffle (1), a limit block (2), a cam (3), a shift shaft (4), a spacer (6) and a torsion spring (7); the shift shaft (4) is provided with a cam (3), a spacer (6), a torsion spring (7) and a baffle (1); the baffle (1) is rigidly connected to the shift shaft (4); the baffle (1) is provided with a limit block (2); the cam (3) is rotatably connected to the shift shaft (4); the end of the cam (3) is in matching contact with the limit block (2); the cam (3) is provided with a spiral groove (5); the spacer (6) is arranged on the shift shaft (4) between the baffle (1) and the cam (3) , the baffle (1) and the cam (3) are axially positioned; the torsion spring (7) is installed on the outside of the spacer (6); the HL fork assembly (12) comprises an HL fork (8), a pin (9) and a roller (10); the HL fork (8) is slidably arranged on the guide shaft (11); the roller (10) is installed on the end of the HL fork (8) through the pin (9); the roller (10) is rollingly arranged in the spiral groove (5) of the cam (3); when in use, the shift shaft (4) drives the baffle (1) to rotate, the limit block (2) on the baffle (1) pushes the cam (3) to rotate, the roller (10) rolls in the spiral groove (5) as the cam (3) rotates, and the HL fork assembly (12) is displaced on the guide shaft (11).
2. The electronically controlled transfer case shift limiter mechanism according to claim 1, characterized in that: A shift block (15) is provided at the end of the cam (3), and the shift block (15) is in matching contact with the limit block (2).
3. The electronically controlled transfer case shift limiter mechanism according to claim 1 or 2, characterized in that: The limit block (2) is an L-shaped protruding structure. When the transfer case is shifted from the 4L gear position to the 4H gear position, the limit block (2) drives the shift cam (3) to rotate, thereby realizing the 4L gear position switching.
4. The electronically controlled transfer case shift limiter mechanism according to claim 1 or 2, characterized in that: A roller mounting seat (14) is provided at the end of the HL shift fork (8), an axial hole is provided on the roller mounting seat (14), an axis of the roller (10) is arranged in the axial hole, and the roller (10) is mounted on one side of the roller mounting seat (14) via a pin (9).