CN116146690A

CN116146690A - High-integration type small cover assembly of multi-gear light-truck gearbox

Info

Publication number: CN116146690A
Application number: CN202211723323.4A
Authority: CN
Inventors: 郑文超; 李振省; 马利东
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-05-23

Abstract

The invention belongs to the technical field of gearbox accessories, and particularly relates to a multi-gear light-truck gearbox highly-integrated small cover assembly, which comprises a small cover shell, wherein a gear shifting shaft penetrates through the small cover shell, a first cavity and a second cavity are arranged in the small cover shell, an auxiliary box gear shifting control mechanism is arranged on the side face of the first cavity, a gear shifting hand feeling mechanism is arranged on the side face, opposite to the side face where the auxiliary box gear shifting control mechanism is arranged, of the first cavity, a main box gear selecting and shifting mechanism is arranged on the second cavity, a plurality of mounting holes are formed in the outer portion of the small cover shell, and the mounting holes are symmetrically distributed at the side line of the bottom of the side wall of the first cavity. The small cover assembly is provided with the main box gear selecting and shifting mechanism, the auxiliary box gear shifting control mechanism and the gear shifting hand feeling mechanism, the integration level is high, and meanwhile, the arrangement of the mounting holes and the gear shifting lever can meet the requirement of the whole vehicle on left and right operation modes without redesigning another small cover assembly.

Description

High-integration type small cover assembly of multi-gear light-truck gearbox

Technical Field

The invention belongs to the technical field of gearbox accessories, and particularly relates to a multi-gear light-truck gearbox highly-integrated small cover assembly.

Background

The design requirement of the speed changer is that the gear number and each gear ratio of the speed changer are correctly selected to be optimally matched with the parameters of the engine so as to ensure that the automobile has good dynamic property and economy, the engine and the transmission system can be separated for a long time by setting a neutral gear, the automobile can run in a reverse way by setting a reverse gear, and the speed changer has the advantages of simple, convenient and rapid operation, labor saving, high transmission efficiency, stable work and no noise.

With the development of the gearbox of domestic commercial vehicles, especially light commercial vehicles, the requirements on the universality and the compactness of the small cover assembly are higher and higher on the basis of meeting the excellent maneuvering performance, so that the modularization target is realized, the cost is reduced, and the installation and the maintenance are convenient. At present, the commonality and the compactness of the small cover assembly of the gearbox on the market are poor, and the aims of the left and right exchange commonality and the high integration of parts of the small cover assembly cannot be met.

The technical scheme discloses a small cover assembly with 9-gear box double-rod single-H belt pneumatic booster, the publication number is CN113944750A, and the publication date is 2022.01.18, and the technical scheme comprises a small cover shell, a gear shifting rocker arm, a pneumatic booster, a spline housing, a gear shifting shaft, a gear shifting head, an interlocking fork, a clamp spring, a gear selecting spring, a limiting sleeve, a spacer bush, a driving pin, a sector block, a self-locking pin shaft, a self-locking spring, a reverse gear ring, a cylinder and a piston rod, wherein the gear shifting shaft is arranged in the small cover shell, and the gear shifting rocker arm is arranged at the left end part of the gear shifting shaft through a spline and is connected with a whole vehicle gear shifting pull wire; the right end of the small cover shell is provided with a cylinder, the right end of the gear shifting shaft is arranged in the small cover shell through a spacer bush, and a piston rod of the cylinder moves up and down to limit the gear shifting shaft to select gears to the right; the gear shifting shaft and the pneumatic booster are provided with external splines, the spline housing is sleeved on the gear shifting shaft, the pneumatic booster is in internal spline fit with the spline housing, and the gear shifting head is arranged on the gear shifting shaft through a cylindrical pin; the pneumatic booster is driven when the gear shifting rocker arm rotates, the gear shifting shaft is driven to rotate through the spline housing, the gear shifting head is driven to rotate, the gear shifting block in the main box is shifted by the gear shifting head to realize gear shifting of the gear box, because the requirements of different main machine factories on gear shifting positions (left position and right position) of the gear box are different, the scheme cannot meet the universality of the small cover assembly, meanwhile, the space used by the structure is larger, the separation distance between parts is larger, and the integration level and compactness of the parts are poor.

Disclosure of Invention

Aiming at the problems of poor universality, poor part integration level and poor compactness of the small cover assembly in the background technology, the invention provides a high-integration type small cover assembly of a multi-gear light-truck gearbox.

The technical scheme adopted by the invention for achieving the technical effects is as follows: the high-integration type small cover assembly of the multi-gear light truck gearbox comprises a small cover shell, wherein a gear shifting shaft penetrates through the small cover shell, a first cavity and a second cavity are arranged in the small cover shell, and a gear shifting rod is sleeved on the gear shifting shaft and positioned in the first cavity; two sides of the gear shifting lever are respectively provided with a gear selecting limiting spring seat, and the two gear selecting limiting spring seats are movably sleeved on the gear shifting shaft; the gear shifting mechanism comprises a gear shifting shaft, a gear selecting and balancing spring, a gear shifting hand feeling mechanism, a main box gear selecting and shifting mechanism, a small cover shell and a plurality of mounting holes, wherein the gear selecting and balancing spring is sleeved on the gear shifting shaft between the gear selecting and shifting limiting spring seat and the first cavity, the side face of the first cavity is provided with a secondary box gear shifting control mechanism, one side of the first cavity opposite to the side face of the secondary box gear shifting control mechanism is provided with the gear shifting hand feeling mechanism, the main box gear selecting and shifting mechanism is arranged on the second cavity, and the mounting holes are distributed at the side wall bottom edge of the first cavity. The small cover assembly is provided with the main box gear selecting and shifting mechanism, the auxiliary box gear shifting control mechanism and the gear shifting hand feeling mechanism, the integration level is high, and meanwhile, the arrangement of the mounting holes and the gear shifting lever can meet the requirement of the whole vehicle on left and right operation modes without redesigning another small cover assembly.

Further, the main box gear selecting and shifting mechanism comprises a gear selecting mechanism and a gear shifting mechanism;

the gear selecting mechanism comprises a gear selecting rotary arm shaft, the gear selecting rotary arm shaft is rotatably arranged on the second cavity of the small cover shell, the upper end of the gear selecting rotary arm shaft is connected with a gear selecting rocker arm, the lower end of the gear selecting rotary arm shaft is connected with a gear selecting rotary arm, a stirring block is arranged on the gear selecting rotary arm, and a stirring groove matched with the stirring block is formed in the part of the gear shifting shaft in the second cavity;

further, the gear shifting mechanism comprises a balancing weight connected to one end, far away from the first cavity, of the gear shifting shaft, and a flexible shaft connecting pin for gear shifting is connected to the lower portion of the balancing weight through a nut.

Further, the auxiliary box gear-shifting control mechanism comprises a stop valve fixedly connected to the outer side of the small cover shell, a push rod of the stop valve penetrates through the small cover shell to be in butt joint with a gear shifting lever, a V-shaped groove is formed in the joint of the gear shifting lever and the push rod of the stop valve, and the stop valve is connected with a pipe joint.

Further, the gear shifting hand feeling mechanism comprises a neutral gear positioning seat fixedly connected to the side face of the small cover shell, a centering block is arranged on one side, close to the neutral gear positioning seat, of the gear shifting lever, a groove is formed in the middle of the centering block, and a column head of the neutral gear positioning seat is located in the groove of the centering block in a neutral gear state.

Further, the small cover shell penetrates through the neutral gear switch on the side face of the second cavity, a neutral gear switch driving pin is arranged on the neutral gear switch, a neutral gear switch groove is formed in the gear shifting shaft, and the neutral gear switch driving pin is located in the neutral gear switch groove in a neutral gear state.

Further, a blocking cover is arranged on the first cavity and is connected with one end, far away from the second cavity, of the gear shifting shaft.

Further, the small cover shell is opened at the lower end of the second cavity, and the lower end opening of the small cover shell is detachably connected with a cover plate.

Further, the gear shifting lever is fixed on the gear shifting shaft through a cylindrical pin, the included angle between the axial direction of the cylindrical pin and the bottom surface of the small cover assembly is 45 degrees, and the axial direction of the cylindrical pin is perpendicular to the axial direction of the gear shifting shaft.

From the technical scheme, the invention has the following beneficial effects: the left and right installation exchange is realized through the installation window of the small cover shell and the structure of the gear shift lever; the specification and the rigidity of the return spring are controlled, and the neutral gear positioning seat is matched with a certain middle mechanism, so that the gear shifting mechanism has excellent gear shifting performance; and the gear shifting lever is matched with the stop valve to finish gear shifting control of the auxiliary box.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a split structure according to an embodiment of the present invention.

Fig. 2 is a schematic sectional view of a shift shaft according to an embodiment of the present invention in an axial direction.

FIG. 3 is a schematic cross-sectional view at A-A in FIG. 2.

FIG. 4 is a schematic cross-sectional view at B-B in FIG. 2.

In the figure: 1. the gear shifting device comprises a small cover shell, 2, a gear shifting shaft, 3, a first cavity, 4, a second cavity, 5, a gear shifting lever, 6, a gear selecting limiting spring seat, 7, a gear selecting balance spring, 8, a secondary box gear shifting control mechanism, 9, a gear shifting hand feeling mechanism, 10, a main box gear selecting mechanism, 11, a gear selecting mechanism, 12, a gear shifting mechanism, 13, a gear selecting rotating arm shaft, 14, a gear selecting rocker arm, 15, a gear selecting rotating arm, 16, a shifting block, 17, a shifting groove, 18, a balancing weight, 19, a gear shifting flexible shaft connecting pin, 20, a stop valve, 21, a pipe joint, 22, a neutral gear positioning seat, 23, a centering block, 24, a neutral gear switch, 25, a neutral gear switch driving pin, 26, a neutral gear switch groove, 27, a blocking cover, 28, a cover plate, 29, a cylindrical pin, 30 and a mounting hole.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.

According to the highly integrated small cover assembly of the multi-gear light-truck gearbox shown in fig. 1-4, the small cover assembly comprises a small cover shell 1, a gear shifting shaft 2 penetrates through the small cover shell 1, a first cavity 3 and a second cavity 4 are arranged in the small cover shell 1, and a gear shifting rod 5 is sleeved on the gear shifting shaft 2 and positioned in the first cavity 3; two sides of the gear shifting lever 5 are respectively provided with a gear selecting limiting spring seat 6, and the two gear selecting limiting spring seats 6 are movably sleeved on the gear shifting shaft 2; the gear shifting shaft 2 between the gear selecting and limiting spring seat 6 and the first cavity 3 is sleeved with a gear selecting and balancing spring 7, an auxiliary box gear shifting control mechanism 8 is arranged on the side face of the first cavity 3, a gear shifting hand feeling mechanism 9 is arranged on one side, opposite to the side face where the auxiliary box gear shifting control mechanism 8 is arranged, of the first cavity 3, a main box gear selecting and shifting mechanism 10 is arranged on the second cavity 4, a plurality of mounting holes 30 are formed in the outer portion of the small cover shell 1, and the mounting holes 30 are distributed at side wall bottom edge lines of the first cavity 3.

The main box gear selecting and shifting mechanism 10 comprises a gear selecting mechanism 11 and a gear shifting mechanism 12;

the gear selecting mechanism 12 comprises a gear selecting rotating arm shaft 13, the gear selecting rotating arm shaft 13 is rotatably arranged on the second cavity 4 of the small cover shell 1, the upper end of the gear selecting rotating arm shaft 13 is connected with a gear selecting rocker arm 14, the lower end of the gear selecting rotating arm shaft 13 is connected with a gear selecting rotating arm 15, a stirring block 16 is arranged on the gear selecting rotating arm 15, and a stirring groove 17 matched with the stirring block 16 is arranged on the part of the gear shifting shaft 2 in the second cavity 4;

the gear shifting mechanism 12 comprises a balancing weight 18 connected to one end, far away from the first cavity 3, of the gear shifting shaft 2, and a flexible shaft connecting pin 19 for gear shifting is connected to the lower portion of the balancing weight 18 through a nut.

The auxiliary box gear control mechanism 8 comprises a stop valve 20 fixedly connected to the outer side of the small cover shell 1, a push rod of the stop valve 20 penetrates through the small cover shell 1 to be abutted against the gear shift lever 5, the gear shift lever 5 is provided with a V-shaped groove at the joint of the push rod of the stop valve 20, the stop valve 20 is connected with a pipe joint 21, the gear shift hand feeling mechanism 9 comprises a neutral gear positioning seat 22 fixedly connected to the side surface of the small cover shell 1, a centering block 23 is arranged on one side, close to the neutral gear positioning seat 22, of the gear shift lever 5, a groove is formed in the middle of the centering block 23, a column head of the neutral gear positioning seat 22 is located in the groove of the centering block 23 in a neutral gear state, the small cover shell 1 penetrates through a neutral gear switch 24 on the side surface of the second cavity 4, a neutral gear switch driving pin 25 is arranged on the neutral gear switch 24, a neutral gear switch driving pin 26 is arranged on the gear shaft 2, a first cavity 3 is provided with a neutral gear 27, one end, far away from the second cavity 4, of the gear shift shaft 2 is connected with the stop cap 27, a cylindrical pin 29 is arranged on the lower end, close to the second cavity 4, and the cylindrical pin is perpendicular to the axis 29 of the small cover shell 2, and the cylindrical pin is perpendicular to the axis 29 in the direction of the small cover 2, and the cylindrical axis direction of the small cover 2 is the cylindrical pin 29.

The working principle of the invention is as follows: the gear selecting action is mainly completed by swinging a gear selecting rocker arm 14, driving a gear selecting rocker arm shaft 13 to rotate, driving a gear selecting rocker arm 15 to swing, and driving a gear shifting shaft 2 and a gear shifting lever 5 to axially move, wherein the gear shifting lever 5 is fastened on the gear shifting shaft 2 through a cylindrical pin 29. The gear selecting return action is completed by pushing the gear selecting limit spring seat 6 and then pushing the gear shifting lever 5 by the compressed gear selecting balance spring 7;

the gear shifting action is finished by swinging a balancing weight 18 and driving a gear shifting shaft 2 and a gear shifting lever 5 to rotate;

the positioning of the gear shift lever 5 in neutral gear and the suction feeling in the gear shift process are realized through the cooperation of the centering block 23 of the gear shift lever 5 and the neutral gear positioning seat 22, wherein the clearance between the neutral gear positioning seat 22 and the centering block 23 of the gear shift lever 5 in neutral gear is 0, so that the gear shift idle stroke is eliminated;

the neutral switch is turned off by the gear shifting shaft 2 so as to push the neutral switch driving pin 25 and then push the neutral switch 24, when the gear is shifted, the neutral switch driving pin 25 is separated from the neutral switch groove 26 of the gear shifting shaft 2, the switch is turned on, and the whole vehicle neutral switch indicator light is turned off;

when the main box is in gear, the gear control of the rear auxiliary box is realized through the cooperation of the stop valve 20 and the V-shaped groove of the gear shift lever 5. When the main tank is in gear, the gear shift lever 5 rotates to push the push rod of the stop valve 20 to axially move, at the moment, the air inlet and the air outlet of the stop valve 20 cannot be communicated, and the whole air source cannot drive the auxiliary tank to be in gear through the stop valve 20;

the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The high-integration type small cover assembly of the multi-gear light truck gearbox comprises a small cover shell (1) and is characterized in that a gear shifting shaft (2) penetrates through the small cover shell (1), a first cavity (3) and a second cavity (4) are arranged in the small cover shell (1), and a gear shifting rod (5) is sleeved on the gear shifting shaft (2) and positioned in the first cavity (3); two sides of the gear shifting lever (5) are respectively provided with a gear selecting limiting spring seat (6), and the two gear selecting limiting spring seats (6) are movably sleeved on the gear shifting shaft (2); the gear selecting and shifting mechanism comprises a gear selecting and shifting shaft (2) positioned between a gear selecting and limiting spring seat (6) and a first cavity (3), a gear selecting and shifting balance spring (7) is sleeved on the gear shifting shaft, an auxiliary box gear shifting control mechanism (8) is arranged on the side face of the first cavity (3), a gear shifting hand feeling mechanism (9) is arranged on one side, opposite to the side face where the auxiliary box gear shifting control mechanism (8) is located, of the first cavity (3), a main box gear selecting and shifting mechanism (10) is arranged on a second cavity (4), a plurality of mounting holes (30) are formed in the outer portion of a small cover shell (1), and the mounting holes (30) are distributed at side wall bottom side line positions of the first cavity (3).

2. The multi-speed light truck gearbox highly integrated small cover assembly of claim 1, wherein the main box gear selection and shifting mechanism (10) comprises a gear selection mechanism (11) and a shifting mechanism (12);

the gear selecting mechanism (11) comprises a gear selecting rotary arm shaft (13), the gear selecting rotary arm shaft (13) is rotatably arranged on a second cavity (4) of the small cover shell (1), the upper end of the gear selecting rotary arm shaft (13) is connected with a gear selecting rocker arm (14), the lower end of the gear selecting rotary arm shaft (13) is connected with a gear selecting rotary arm (15), a stirring block (16) is arranged on the gear selecting rotary arm (15), and a stirring groove (17) matched with the stirring block (16) is formed in the part of the gear shifting shaft (2) in the second cavity (4).

3. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 2, wherein the gear shifting mechanism (12) comprises a balancing weight (18) connected to one end of the gear shifting shaft (2) far away from the first cavity (3), and a flexible shaft connecting pin (19) for gear shifting is connected to the lower portion of the balancing weight (18) through a nut.

4. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 1, wherein the auxiliary box gear shifting control mechanism (8) comprises a stop valve (20) fixedly connected to the outer side of the small cover shell (1), a push rod of the stop valve (20) passes through the small cover shell (1) to be abutted with a gear shifting lever (5), a V-shaped groove is formed in the joint of the gear shifting lever (5) and the push rod of the stop valve (20), and the stop valve (20) is connected with a pipe joint (21).

5. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 1, wherein the gear shifting hand feeling mechanism (9) comprises a neutral gear positioning seat (22) fixedly connected to the side face of the small cover shell (1), a centering block (23) is arranged on one side, close to the neutral gear positioning seat (22), of the gear shifting lever (5), a groove is formed in the middle of the centering block (23), and a column head of the neutral gear positioning seat (22) is located in the groove of the centering block (23) in a neutral gear state.

6. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 1, wherein the small cover shell (1) is provided with a neutral gear switch (24) in a penetrating manner on the side face of the second cavity (4), the neutral gear switch (24) is provided with a neutral gear switch driving pin (25), the gear shifting shaft (2) is provided with a neutral gear switch groove (26), and the neutral gear switch driving pin (25) is located in the neutral gear switch groove (26) in a neutral gear state.

7. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 1, wherein a blocking cover (27) is arranged on the first cavity (3), and the blocking cover (27) is connected with one end of the gear shifting shaft (2) far away from the second cavity (4).

8. The multi-gear light truck gearbox highly integrated small cover assembly according to claim 1, wherein the small cover shell (1) is opened at the lower end of the second cavity (4), and a cover plate (28) is detachably connected to the lower end opening of the small cover shell (1).

9. The multi-gear light-truck gearbox highly-integrated small cover assembly according to claim 1, wherein the gear shifting lever (5) is fixed on the gear shifting shaft (2) through a cylindrical pin (29), an included angle between the axis direction of the cylindrical pin (29) and the bottom surface of the small cover assembly is 45 degrees, and the axis direction of the cylindrical pin (29) is perpendicular to the axis direction of the gear shifting shaft (2).