A gear shift mechanism for a vehicle

Abstract

The utility model discloses a kind of automobile gear shifting mechanism, it adopts the cross shaft assembly including first axle seat, first rotating shaft, second axle seat and second rotating shaft to connect base and gear lever, replace traditional ball head bush structure, to realize the swing of no gap;And set up by first limit screw, second limit screw, third limit screw and movable pin constitute mechanical type limiting component, provide three explicit limit points for the left and right swing stroke of gear lever, correspond to different gear respectively, wherein movable pin and pull ring, pull line constitute reverse interlocking mechanism, need to pull unlock can be hung into reverse gear.The utility model eliminates gear shifting virtual position and vacancy, improves gear shifting precision, operation feeling and safety, structure is stable and reliable, long service life.

Description

Technical Field

[0001] This utility model belongs to the field of automotive technology, specifically relating to an automotive gear shifting mechanism. Background Technology

[0002] Shifting gears in a car is achieved by manipulating the gear shift mechanism, therefore, the precision and reliability of the shift mechanism directly affect driving safety. Traditional manual transmissions often use a ball joint and bushing structure to allow the gear shift lever to swing in all directions. While this structure is simple, over time, wear can occur between the ball joint and the bushing, increasing the clearance and resulting in noticeable shift play and excess gear. Shift play makes the gear feel vague and reduces driver precision; while excess gear play can cause the gear lever to vibrate while driving, or even unexpected disengagement, affecting both driving safety and shifting accuracy. Summary of the Invention

[0003] This utility model aims to overcome the shortcomings of traditional ball-head bushing type shifting mechanisms, such as easy wear, play, and excessive play, by providing a shifting mechanism with stable structure, direct transmission, clear positioning, and effectively extended service life. The objective of this utility model is achieved through the following technical solution:

[0004] A car gear shifting mechanism includes a base, a gear shift lever, and a cross shaft assembly connecting the two. The cross shaft assembly includes a first bearing seat, a first rotating shaft, a second bearing seat, and a second rotating shaft. The first bearing seat is fixed to the base, and the second bearing seat is rotatably connected to the first bearing seat via the first rotating shaft. The gear shift lever is rotatably connected to the second bearing seat via the second rotating shaft. The central axes of the first rotating shaft and the second rotating shaft are perpendicular to each other. The gear shift lever swings left and right via the first rotating shaft and swings back and forth via the second rotating shaft. A limiting component is provided between the gear shift lever and the base. The limiting component limits the left and right swing stroke of the gear shift lever and provides three limiting points corresponding to different gears.

[0005] Preferably, the first bearing seat is fixed on the top of the base, the front end of the first rotating shaft is rotatably engaged with the first bearing seat through the first bearing, and a torsion spring is fitted on the first rotating shaft to reset it to the neutral position.

[0006] Preferably, the second shaft seat is fixed to the tail end of the first rotating shaft. The second shaft seat includes a first clamping wall and a second clamping wall disposed opposite to each other. The second rotating shaft is vertically disposed on the two clamping walls, and the shift lever is rotatably disposed on the second rotating shaft. The two clamping walls restrict the degree of freedom of the shift lever in the axial direction of the second rotating shaft.

[0007] Preferably, the assembly section of the shift lever for passing through the second rotating shaft has two flat walls, which are respectively attached to the first clamping wall and the second clamping wall.

[0008] Preferably, the base includes a first sidewall and a second sidewall disposed opposite to each other, and the shift lever is movably disposed between the first sidewall and the second sidewall; the limiting assembly includes a first limiting screw fixed to the inner side of the first sidewall, a second limiting screw fixed to the inner side of the second sidewall, a third limiting screw fixed to the outer side of the shift lever or the second bearing seat, and a movable pin movably disposed to the inner side of the second sidewall.

[0009] Preferably, the movable pin can be moved to the withdrawn position under the action of the control pin assembly; the first limiting screw provides a first limiting point for the shift lever, the second limiting screw provides a second limiting point for the shift lever, and the third limiting screw cooperates with the movable limiting screw to provide a third limiting point for the shift lever.

[0010] Preferably, the travel of the shift lever to the second limit point is greater than its travel to the third limit point.

[0011] Preferably, when the shift lever reaches the first limit point, the first clamping wall of the second axle seat abuts against the first limit screw; when the shift lever reaches the third limit point, the third limit screw abuts against the movable pin in the initial position; after the movable pin moves to the withdrawn position, the shift lever can reach the second limit point to correspond to the reverse gear, at which time the second clamping wall of the second axle seat abuts against the second limit screw.

[0012] Preferably, the movable pin is slidably mounted on the pin seat, and the pin seat is fixed on the first shaft seat; the control pin assembly includes a pull wire and a pull ring, the pull wire is connected between the movable pin and the pull ring, and the pull ring is slidably mounted on the shift lever; a return spring is installed inside the pin seat to reset the movable pin from the withdrawn position to the initial position.

[0013] Preferably, a rocker arm is mounted on the outer side of the second bearing seat. The rocker arm is linked to the gear selector arm via a tie rod with spherical bearings at both ends. The lower end of the gear selector arm is connected to the first cable at the gear shift end. The lower end of the gear shift lever is connected to the second cable at the gearbox end.

[0014] Compared with the prior art, this utility model has the following technical effects: By setting the cross shaft assembly, the shift play and gear lever play during driving are eliminated, improving shift accuracy and reliability. This transmission structure directly and accurately converts the swing of the gear lever into shift stroke, avoiding the cumulative clearance caused by the contact wear between the ball head and the bushing surface; The limiting assembly, with the mechanical cooperation of the first limiting screw, the second limiting screw, the third limiting screw and the movable pin, provides three clear stop points for the left and right swing stroke of the gear lever to correspond to different gears. When the gear lever swings to these limit points, a clear mechanical collision feeling is generated, providing intuitive and reliable gear position feedback; By setting a controllable movable pin, which cooperates with the third limiting screw, a mechanical interlock mechanism for reverse gear is formed. The driver must move the movable pin through a specific operation to swing the gear lever to the reverse position. This design effectively prevents the risk of accidentally engaging reverse gear while driving and improves safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the limiting component structure in this utility model;

[0018] Figure 4 This is a schematic diagram of the control pin assembly structure of this utility model;

[0019] The following markings are used in the diagram: Base 1; Gear shift lever 2; First side wall 11; Second side wall 12; First shaft seat 31; Torsion spring 32; Second shaft seat 33; Second rotating shaft 34; First limit screw 41; Second limit screw 42; Third limit screw 43; Movable pin 44; Pin seat 45; Return spring 46; Pull cable 47; Pull ring 48; Sway bar 51; Gear selector arm 52; Pull rod 53. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0021] like Figures 1 to 4 As shown, a car gear shifting mechanism in this embodiment mainly includes a base 1, a gear shift lever 2, and a cross shaft assembly connecting the two.

[0022] The base 1 includes a first side wall 11 and a second side wall 12 that are arranged vertically relative to each other, and the active area of ​​the shift lever 2 is located between the first side wall 11 and the second side wall 12.

[0023] The cross shaft assembly includes a first bearing seat 31, a first rotating shaft, a second bearing seat 33, and a second rotating shaft 34. The first bearing seat 31 is fixedly installed at the top center of the base 1 by bolts. The first rotating shaft is horizontally arranged, and its front end is rotatably engaged with the first bearing seat 31 through a first bearing. A torsion spring 32 is fitted on the first rotating shaft, and the torsion spring 32 provides a force to automatically return the first rotating shaft and its components to the neutral position.

[0024] The second shaft seat 33 is fixedly installed at the tail end of the first rotating shaft and swings left and right together with the first rotating shaft; the second shaft seat 33 has a first clamping wall and a second clamping wall arranged relatively parallel to each other; the second rotating shaft 34 is vertically arranged between the first clamping wall and the second clamping wall, and the central axes of the first rotating shaft and the second rotating shaft 34 are perpendicular to each other; the middle part of the shift lever 2 is provided with an assembly section, which is provided with a through hole for the second rotating shaft 34 to pass through, so that the shift lever 2 can swing back and forth around the axis of the second rotating shaft 34; the two sides of the assembly section are machined into flat walls, which are respectively attached to the inner sides of the first clamping wall and the second clamping wall of the second shaft seat 33, thereby restricting the degree of freedom of the shift lever in the axial direction of the second rotating shaft.

[0025] A rocker arm 51 is mounted on the outer side of the first clamping wall. The rocker arm is linked to the gear selector arm 52 via a pull rod 53 with spherical bearings at both ends. The lower end of the gear selector arm 52 is connected to the first cable at the gear shift end. The lower end of the gear shift lever 2 is connected to the second cable at the gearbox end. When the driver operates the gear shift lever 2, the force of its left and right swing is transmitted to the first rotating shaft through the second bearing 33, forcing the first rotating shaft to rotate within the first bearing 31. The rocker arm 51 on the outer side of the second bearing 33 is linked to the gear selector arm 52 via the pull rod 53 with spherical bearings at both ends. The gear selection action is achieved by the left and right swing of the gear selector arm 52 pushing and pulling the first cable. The lower end of the gear shift lever 2 is connected to the second cable at the gearbox end. The gear shift action is completed by the back and forth swing of the gear shift lever 2 pushing and pulling the second cable.

[0026] The limiting component 4 is used to precisely limit the left and right swing stroke of the shift lever 2 and corresponds to different gears. The first limiting screw 41 is fixedly installed on the inner side of the first side wall 11 of the base 1; the second limiting screw 42 is fixedly installed on the inner side of the second side wall 12 of the base 1; and the third limiting screw 43 is fixedly installed on the outer side of the second bearing 33.

[0027] The movable pin 44 is slidably fitted into a pin seat 45 fixed on the first shaft seat 31; the pin seat 45 is equipped with a return spring 46, which normally pushes the movable pin 44 to the initial position, causing it to partially extend out of the pin seat; the control pin assembly includes a pull cable 47 and a pull ring 48 fitted on the shift lever 2. One end of the pull cable 47 is connected to the movable pin 44, and the other end is connected to the pull ring 48. Pulling the pull ring 48 upwards can pull the movable pin 44 back to the pin seat 45 through the pull cable 47, that is, to the withdrawn position.

[0028] When the shift lever 2 swings to the right to its limit position, the outer side of the first clamping wall of the second shaft seat 33 abuts against the first limit screw 41, preventing it from moving further to the right. This position is the first limit point, corresponding to fifth and sixth gear. When the shift lever 2 is in the neutral position, the limit screws do not interfere with each other, corresponding to third and fourth gear. When the shift lever 2 swings to the left for a certain distance, the third limit screw 43 fixed on the second shaft seat 33 will abut against the end of the movable pin 44 in the initial position, forming a blockage. This position is the third limit point, corresponding to first and second gear.

[0029] When reverse gear needs to be engaged, the driver must first pull up the pull ring 48 to move the movable pin 44 to the disengaged position, thus avoiding the movement path of the third limit screw 43. Then, continue to swing the shift lever 2 to the left until the outer side of the second clamping wall of the second shaft seat 33 abuts against the second limit screw 42, preventing further leftward movement. This position is the second limit point, corresponding to the reverse gear position. After disengaging reverse gear, the shift lever automatically returns to the center position under the action of the torsion spring. After releasing the pull ring 48, the return spring 46 pushes the movable pin 44 back to its initial position. Because the travel of the shift lever 2 to the second limit point is greater than its travel to the third limit point, mechanical protection for reverse gear is achieved.

[0030] In summary, this utility model provides a high-precision, high-reliability automotive gear shifting mechanism with clear tactile feedback and a safety interlock function through the combination of a cross shaft structure and a mechanical limiting component.

[0031] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open-ended meaning, that is, equivalent to "at least comprising...", and should not be understood as having a closed-ended meaning, that is, its meaning should not be understood as "only comprising...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0032] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A car gear shifting mechanism, characterized in that, The device includes a base, a shift lever, and a cross shaft assembly connecting the two. The cross shaft assembly includes a first bearing seat, a first rotating shaft, a second bearing seat, and a second rotating shaft. The first bearing seat is fixed to the base, and the second bearing seat is rotatably connected to the first bearing seat via the first rotating shaft. The shift lever is rotatably connected to the second bearing seat via the second rotating shaft. The central axes of the first rotating shaft and the second rotating shaft are perpendicular to each other. A limiting component is provided between the shift lever and the base. The limiting component limits the left and right swing travel of the shift lever and provides three limiting points corresponding to different gears.

2. The automotive gear shifting mechanism according to claim 1, characterized in that, The first bearing seat is fixed on the top of the base. The front end of the first rotating shaft is rotatably engaged with the first bearing seat through the first bearing. A torsion spring is fitted on the first rotating shaft to reset it to the neutral position.

3. The automotive gear shifting mechanism according to claim 2, characterized in that, The second shaft seat is fixed to the tail end of the first rotating shaft. The second shaft seat includes a first clamping wall and a second clamping wall that are arranged opposite to each other. The second rotating shaft is vertically mounted on the two clamping walls, and the shift lever is rotatably mounted on the second rotating shaft. The two clamping walls restrict the degree of freedom of the shift lever in the axial direction of the second rotating shaft.

4. The automotive gear shifting mechanism according to claim 3, characterized in that, The assembly section through which the shift lever passes through the second rotating shaft has two flat walls, which are respectively attached to the first clamping wall and the second clamping wall.

5. A car gear shifting mechanism according to claim 4, characterized in that, The base includes a first sidewall and a second sidewall disposed opposite to each other, and the shift lever is movably disposed between the first sidewall and the second sidewall; the limiting assembly includes a first limiting screw fixed to the inner side of the first sidewall, a second limiting screw fixed to the inner side of the second sidewall, a third limiting screw fixed to the outer side of the shift lever or the second bearing seat, and a movable pin movably disposed to the inner side of the second sidewall.

6. The automotive gear shifting mechanism according to claim 5, characterized in that, The movable pin can be moved to the withdrawn position under the action of the control pin assembly; the first limiting screw provides a first limiting point for the shift lever, the second limiting screw provides a second limiting point for the shift lever, and the third limiting screw cooperates with the movable limiting screw to provide a third limiting point for the shift lever.

7. A car gear shifting mechanism according to claim 6, characterized in that, The travel distance of the shift lever to the second limit point is greater than its travel distance to the third limit point.

8. A car gear shifting mechanism according to claim 7, characterized in that, When the shift lever reaches the first limit point, the first clamping wall of the second axle seat abuts against the first limit screw; when the shift lever reaches the third limit point, the third limit screw abuts against the movable pin in the initial position; after the movable pin moves to the withdrawn position, the shift lever can reach the second limit point to correspond to the reverse gear, at which time the second clamping wall of the second axle seat abuts against the second limit screw.

9. A vehicle gear shifting mechanism according to any one of claims 6-8, characterized in that, The movable pin is slidably mounted on the pin seat, and the pin seat is fixed on the first shaft seat; the control pin assembly includes a pull wire and a pull ring, the pull wire is connected between the movable pin and the pull ring, and the pull ring is slidably mounted on the shift lever; a return spring is installed inside the pin seat to reset the movable pin from the withdrawn position to the initial position.

10. A car gear shifting mechanism according to claim 4, characterized in that, The outer side of the second bearing is equipped with a rocker arm, which is linked to the gear selector arm through a tie rod with spherical bearings at both ends. The lower end of the gear selector arm is connected to the first cable at the gear shift end; the lower end of the gear shift lever is connected to the second cable at the gearbox end.

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