CN115451117A

CN115451117A - Integrated eight-gear gearbox

Info

Publication number: CN115451117A
Application number: CN202211173583.9A
Authority: CN
Inventors: 王永意; 陈伦宏; 姚世煜; 刘俊; 左端军
Original assignee: Hubei Huayang Auto Transmission System Co ltd
Current assignee: Hubei Huayang Auto Transmission System Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2022-12-09

Abstract

The invention discloses an integrated eight-gear transmission, which relates to the technical field of automobile parts and comprises an upper cover, wherein a speed change mechanism is arranged in an inner cavity of the upper cover; the upper cover is provided with a hollow bulge part, and the cavity of the bulge part is communicated with the inner cavity of the upper cover; the bulge part is provided with an operating device; the operating device comprises a gear shift operating shaft assembly, the gear shift operating shaft assembly is inserted into the cavity of the bulge, and a reverse gear balance spring, a reverse gear damping sleeve, a gear shift shifting head, an air valve control block and a forward gear balance spring are sequentially installed on the part, inserted into the cavity, of the gear shift operating shaft assembly. The invention improves the precision of the gear selecting and shifting position, and the speed change operation is lighter, smoother; the whole height is reduced by 2/5, and the vehicle can be matched with a vehicle with narrow frame space; the assembly connection and the sealing parts are eliminated, and the assembly and the maintenance are convenient.

Description

Integrated eight-gear gearbox

Technical Field

The invention relates to the technical field of automobile parts, in particular to an integrated eight-gear gearbox.

Background

The eight-gear gearbox of the Dongfeng commercial vehicle is a split structure of an operating device and a speed change mechanism, and the operating device and the speed change mechanism are not provided with assembly positioning holes, so that the positions of two parts are easy to deviate after assembly, and the gear selecting and shifting clamping stagnation is caused, so that the faults of gear beating, gear hanging failure and the like are caused; secondly, a sealing gasket is additionally arranged on the joint surface, and the adhesive is not uniformly leaked; thirdly, the existing eight-gear transmission has high hardness requirement on the shift control shaft (spline shaft), and the shift control shaft (spline shaft) has longer length, so that the surface quenching is easy to deform, the axial limiting precision is poor, and a gap is easy to generate. In addition, the existing gear shift control shaft (spline shaft) needs to be processed with an idle groove, so that the processing difficulty is increased. In addition, the two parts are connected together by bolts, and then the appearance is large, so that the eight-gear gearbox is high in height and cannot be matched with a vehicle type with a small frame space.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an integrated eight-gear transmission, wherein a gear selecting and shifting control mechanism is arranged on the same part (shell), so that higher relative position accuracy is easy to obtain, the overall height is reduced by combining the gear selecting and shifting control mechanism and the shell into a whole, the number of assembly parts is reduced, and the assembly process is optimized.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: an integrated eight-gear gearbox comprises an upper cover, wherein a speed change mechanism is arranged in an inner cavity of the upper cover; the upper cover is provided with a hollow bulge part, and the cavity of the bulge part is communicated with the inner cavity of the upper cover; the bulge part is provided with an operating device; the operating device comprises a gear shift operating shaft assembly, the gear shift operating shaft assembly is inserted into the cavity of the bulge, and a reverse gear balance spring, a reverse gear damping sleeve, a gear shift shifting head, an air valve control block and a forward gear balance spring are sequentially installed on the part, inserted into the cavity, of the gear shift operating shaft assembly.

The further improvement lies in that: and a mounting groove is formed in the position of the gear shift operating shaft assembly corresponding to the gear shift shifting head, a reverse gear damping spring is arranged in the mounting groove, and two ends of the reverse gear damping spring are respectively provided with a positioning steel ball.

The further improvement lies in that: an operating shaft oil seal is arranged at the position where the gear shift operating shaft assembly is inserted into the bulge part; the inserting end of the gear shift operating shaft assembly is provided with an operating shaft limiting pin, and a blocking cover is arranged at the position of the protruding part opposite to the inserting end of the gear shift operating shaft assembly.

The further improvement lies in that: and a first limiting bulge matched with the reverse gear damping sleeve and a second limiting bulge matched with the air valve control block are respectively arranged on the inner side wall of the cavity of the bulge part.

The further improvement lies in that: the gear selecting assembly is arranged on the bulge portion and comprises a gear selecting arm, the gear selecting arm is inserted into a cavity of the bulge portion, a gear selecting shaft framework oil seal, a gear selecting shaft gasket and a shaft clamp spring are arranged at the position where the gear selecting arm is inserted into the bulge portion, and a dust cover is arranged outside the gear selecting shaft framework oil seal and the gear selecting shaft gasket.

The further improvement lies in that: the gear-shifting control shaft assembly and the gear-selecting arm are all spline shafts.

The further improvement lies in that: the head of the gear selecting arm is arc-shaped, and a groove for the head of the gear selecting arm to penetrate through is formed in the bottom of the gear shifting head.

The further improvement lies in that: the bulge is provided with a pneumatic control valve, a vent plug assembly and an oil seal oil return cover plate.

The further improvement lies in that: the speed change mechanism comprises a 3/4 gear conversion mechanism assembly and a reverse gear fork shaft, a 1/2 gear fork shaft and a 3/4 gear fork shaft which are arranged in parallel; a reverse gear guide block is arranged on the reverse gear fork shaft; a 1/2 gear speed change fork is arranged on the 1/2 gear fork shaft; and a 3/4 gear shift fork is arranged on the 3/4 gear fork shaft.

The further improvement lies in that: the upper cover is provided with a reverse gear alarm, a neutral gear alarm and a locking mechanism; the locking mechanism comprises a self-locking steel ball and an interlocking steel ball; the interlocking steel balls are respectively arranged between the reverse gear fork shaft and the 1/2 gear fork shaft, between the 1/2 gear fork shaft and the 3/4 gear fork shaft and between the 3/4 gear fork shaft and the neutral position alarm; and interlocking pins are arranged on the 1/2 gear fork shaft and the 3/4 gear fork shaft; the upper cover is provided with a bulge, a self-locking spring is arranged in the bulge, one side of the self-locking steel ball abuts against the self-locking spring, and the other side of the self-locking steel ball abuts against the corresponding fork shaft.

The invention has the beneficial effects that:

1. the invention improves the precision of the gear selecting and shifting position, and the speed change operation is lighter, smoother; the overall height is reduced by 2/5, and the vehicle can be matched with a vehicle type with a narrow frame space; the assembly connection and the sealing parts are eliminated, and the assembly and the maintenance are convenient.

2. In the invention, the gear shift control shaft (spline shaft) does not need to be quenched and does not need to be processed with an idle groove, thereby solving the problems of processing and deformation of the existing gear shift control shaft.

3. In the invention, the damping effect on the gear shifting head can be realized by utilizing the matching of the reverse gear damping sleeve/air valve control block, the first limiting bulge/the second limiting bulge, the reverse gear balance spring/the forward gear balance spring and the reverse gear damping spring/the positioning steel ball; the first limiting protrusion/the second limiting protrusion are used for axially limiting the gear shifting block, and the limiting precision is high.

4. In the invention, the bottom of the gear shifting head is provided with the groove, and the lower end of the gear selecting arm is provided with the shifting piece (head part) matched with the groove, so that the overall height of the eight-gear gearbox is reduced.

5. In the invention, the pneumatic control valve is integrally formed on the bulge part, so that the overall height of the eight-gear gearbox is further reduced.

6. The reverse gear damping sleeve is quenched, so that the problem of abrasion of the positioning steel ball can be solved.

Drawings

FIG. 1 is a perspective view of an integrated eight speed transmission in an embodiment of the present invention;

FIG. 2 is a transverse cross-sectional view of an integrated eight speed transmission in accordance with an embodiment of the present invention;

FIG. 3 is a longitudinal cross-sectional view of an integrated eight speed transmission in accordance with an embodiment of the present invention;

FIG. 4 is a schematic structural view of a shifting mechanism in an embodiment of the present invention;

FIG. 5 is a schematic view of a gear selecting assembly according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a lock mechanism in an embodiment of the present invention.

Reference numerals:

1-covering the upper cover; 11-lumen; 12-neutral alarm; 13-reverse gear alarm;

2-a speed change mechanism; 21-reverse gear fork shaft; 22-reverse gear guide block; a fork shaft of 23-1/2 gear; a 24-1/2 gear shift fork; 25-3/4 gear fork shaft; a 26-3/4 gear shift fork; a 27-3/4 shift switching mechanism assembly;

3-a bump; 31-a cavity; 32-a pneumatic control valve; 33-a vent plug assembly; 34-oil seal oil return cover plate; 35-a first limit projection; 36-a second limit projection;

4-a manipulation device; 401-shift operating shaft assembly; 402-reverse balance spring; 403-reverse gear damping sleeve; 404-a gear shift shifting block; 405-an air valve control block; 406-forward gear balancing spring; 407-reverse gear damping spring; 408-positioning the steel ball; 409-operating shaft oil seal; 410-blocking cover; 411-control shaft limit pin;

5-a gear selection assembly; 51-a gear selecting arm; 52-gear-selecting shaft framework oil seal; 53-select the shaft spacer; 54-snap spring for shaft; 55-a dust cover;

6-a locking mechanism; 61-a boss; 62-self-locking steel balls; 63-self-locking spring; 64-interlocking steel balls; 65-interlocking pins.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, which should not be construed as limiting the specific scope of the present invention.

Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.

The technical scheme and the beneficial effects of the invention are clearer and clearer by further describing the specific embodiment of the invention with the accompanying drawings of the specification. The embodiments described below are exemplary and are intended to be illustrative of the invention, but are not to be construed as limiting the invention.

Referring to fig. 1 to 3, an embodiment of the present invention provides an integrated eight-gear transmission, including an upper cover 1, wherein an inner cavity 11 of the upper cover 1 is provided with a speed change mechanism 2; the upper cover 1 is provided with a hollow bulge part 3, and a cavity 31 of the bulge part 3 is communicated with the inner cavity 11 of the upper cover 1; the bulge 3 is provided with an operating device 4;

referring to fig. 4, the operating device 4 includes a shift operating shaft assembly 401, the shift operating shaft assembly 401 is inserted into the cavity 31 of the raised portion 3, and a reverse balance spring 402, a reverse damping sleeve 403, a shift dial 404, a gas valve control block 405, and a forward balance spring 406 are sequentially installed on a portion of the shift operating shaft assembly inserted into the cavity 31. Specifically, a mounting groove is formed in a position of the shift operating shaft assembly 401 corresponding to the shift shifting head 404, a reverse damping spring 407 is arranged in the mounting groove, and two ends of the reverse damping spring 407 are respectively provided with a positioning steel ball 408. An operating shaft oil seal 409 is provided at a position where the shift operating shaft unit 401 is inserted into the boss portion 3; an insertion end of the shift operation shaft assembly 401 is provided with an operation shaft limiting pin 411, and a blocking cover 410 is arranged at a position of the protruding part 3 opposite to the insertion end of the shift operation shaft assembly 401. The inner side wall of the cavity 31 of the bulge part 3 is respectively provided with a first limit bulge 35 matched with the reverse gear damping sleeve 403 and a second limit bulge 36 matched with the air valve control block 405. The shift knob 404 moves along the shift operating shaft assembly 401 (spline shaft) in the U-shaped groove (first limit projection 35/second limit projection 36), thereby bringing the reverse range damping sleeve 403.

Referring to fig. 1 and 5, a gear selection assembly 5 is further disposed on the raised portion 3, the gear selection assembly 5 includes a gear selection arm 51, the gear selection arm 51 is inserted into the cavity 31 of the raised portion 3, a gear selection shaft skeleton oil seal 52, a gear selection shaft gasket 53 and a shaft snap spring 54 are disposed at a position where the gear selection arm 51 is inserted into the raised portion 3, and a dust cover 55 is disposed outside the gear selection shaft skeleton oil seal 52 and the gear selection shaft gasket 53. Specifically, the shift operating shaft unit 401 and the shift selecting arm 51 are spline shafts. The head of the gear selection arm 51 is arc-shaped, and the bottom of the gear shift knob 404 is provided with a groove for the head of the gear selection arm 51 to pass through. The bulge part 3 is provided with a pneumatic control valve 32, a vent plug assembly 33 and an oil seal oil return cover plate 34.

Referring to fig. 2 and 3, the transmission mechanism 2 includes a 3/4-speed shift switching mechanism assembly 27 and a reverse fork shaft 21, a 1/2-speed fork shaft 23, and a 3/4-speed fork shaft 25 arranged in parallel; a reverse gear guide block 22 is arranged on the reverse gear fork shaft 21; the 1/2 gear fork shaft 23 is provided with a 1/2 gear shift fork 24; the 3/4 gear fork shaft 25 is provided with a 3/4 gear shift fork 26.

Referring to fig. 1 and 6, the upper cover 1 is provided with a reverse gear alarm 13, a neutral gear alarm 12 and a locking mechanism 6; the locking mechanism 6 comprises a self-locking steel ball 62 and an interlocking steel ball 64; interlocking steel balls 64 are respectively arranged between the reverse gear fork shaft 21 and the 1/2 gear fork shaft 23, between the 1/2 gear fork shaft 23 and the 3/4 gear fork shaft 25, and between the 3/4 gear fork shaft 25 and the neutral alarm 12; interlocking pins 65 are arranged on the 1/2-gear fork shaft 23 and the 3/4-gear fork shaft 25; the upper cover 1 is provided with a convex part 61, a self-locking spring 63 is arranged in the convex part 61, one side of the self-locking steel ball 62 is propped against the self-locking spring 63, and the other side of the self-locking steel ball 62 is propped against the corresponding fork shaft.

The working principle and the advantages of the invention are as follows:

self-locking: the self-locking steel ball, the self-locking spring and the fork shaft three-groove prevent automatic gear shifting and automatic gear disengaging.

Interlocking: interlocking pin, interlocking steel ball, fork axle R groove prevent to hang into two shelves simultaneously.

Reverse gear lock: the reverse gear damping sleeve (concentric unequal-diameter sleeve-reverse gear-hanging steel ball moves from a large hole to a small hole), the reverse gear damping spring and the positioning steel ball, when the reverse gear is hung, the positioning steel ball compresses the spring to enter the reverse gear damping sleeve, different gear-shifting handfeels are given to a driver, and the reverse gear is prevented from being mistakenly hung in the process of advancing.

Gear selecting arm assembly: the oil in the gearbox can be thrown and supplied to a gear selecting shaft for lubrication during the running of a vehicle by adopting the framework seal, and the oil is prevented from entering the interior by the waterproof and dustproof device, so that the corrosion is prevented, and the groove part R25 of the gear shifting head is also prevented. The head of the gear selecting arm is a circular arc, so that the structure is compact and the processing is convenient.

Shift operation shaft assembly: the operating shaft and the gear shifting arm adopt a 36-tooth spline connection mode, the angle can be adjusted, and the number of parts of series products is reduced.

In the description of the specification, references to the description of "one embodiment", "preferably", "an example", "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention, and the schematic representation of the term in this specification does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

By describing the above structures and principles, those skilled in the art will appreciate that the present invention is not limited to the above embodiments, and that modifications and substitutions based on the known art are within the scope of the present invention as defined by the appended claims.

Claims

1. An integrated eight-gear gearbox comprises an upper cover (1), wherein a speed change mechanism (2) is arranged in an inner cavity (11) of the upper cover (1); the method is characterized in that: the upper cover (1) is provided with a hollow bulge part (3), and a cavity (31) of the bulge part (3) is communicated with an inner cavity (11) of the upper cover (1); the bulge (3) is provided with an operating device (4); the operating device (4) comprises a gear shift operating shaft assembly (401), the gear shift operating shaft assembly (401) is inserted into the cavity (31) of the bulge portion (3), and a reverse gear balance spring (402), a reverse gear damping sleeve (403), a gear shift shifting head (404), an air valve control block (405) and a forward gear balance spring (406) are sequentially mounted on the portion, inserted into the cavity (31), of the gear shift operating shaft assembly.

2. The integrated eight speed transmission of claim 1, wherein: and a mounting groove is formed in the position, corresponding to the gear shifting head (404), of the gear shifting control shaft assembly (401), a reverse gear damping spring (407) is arranged in the mounting groove, and two ends of the reverse gear damping spring (407) are respectively provided with a positioning steel ball (408).

3. The integrated eight speed transmission of claim 1, wherein: an operating shaft oil seal (409) is arranged at the position where the gear shift operating shaft assembly (401) is inserted into the bulge part (3); an insertion end of the gear shift operating shaft assembly (401) is provided with an operating shaft limiting pin (411), and a blocking cover (410) is arranged at a position of the bulge part (3) opposite to the insertion end of the gear shift operating shaft assembly (401).

4. The integrated eight speed transmission of claim 1, wherein: and a first limiting bulge (35) matched with the reverse gear damping sleeve (403) and a second limiting bulge (36) matched with the air valve control block (405) are respectively arranged on the inner side wall of the cavity (31) of the bulge part (3).

5. The integrated eight speed transmission of claim 1, wherein: the gear selecting assembly (5) is further arranged on the bulge portion (3), the gear selecting assembly (5) comprises a gear selecting arm (51), the gear selecting arm (51) is inserted into the cavity (31) of the bulge portion (3), a gear selecting shaft framework oil seal (52), a gear selecting shaft gasket (53) and a shaft clamp spring (54) are arranged at the position where the gear selecting arm (51) is inserted into the bulge portion (3), and a dust cover (55) is arranged outside the gear selecting shaft framework oil seal (52) and the gear selecting shaft gasket (53).

6. The integrated eight speed transmission of claim 5, wherein: the gear-shifting control shaft assembly (401) and the gear-selecting arm (51) are spline shafts.

7. The integrated eight speed transmission of claim 5, wherein: the head of the gear selecting arm (51) is arc-shaped, and the bottom of the gear shifting head (404) is provided with a groove for the head of the gear selecting arm (51) to pass through.

8. The integrated eight speed transmission of claim 1, wherein: the bulge part (3) is provided with a pneumatic control valve (32), a vent plug assembly (33) and an oil seal oil return cover plate (34).

9. The integrated eight speed transmission of claim 1, wherein: the speed change mechanism (2) comprises a 3/4 gear conversion mechanism assembly (27) and a reverse gear fork shaft (21), a 1/2 gear fork shaft (23) and a 3/4 gear fork shaft (25) which are arranged in parallel; a reverse gear guide block (22) is arranged on the reverse gear fork shaft (21); a 1/2 gear shifting fork (24) is arranged on the 1/2 gear fork shaft (23); and a 3/4 gear shifting fork (26) is arranged on the 3/4 gear fork shaft (25).

10. The integrated eight speed transmission of claim 9, wherein: the upper cover (1) is provided with a reverse gear alarm (13), a neutral gear alarm (12) and a locking mechanism (6); the locking mechanism (6) comprises a self-locking steel ball (62) and an interlocking steel ball (64); the interlocking steel balls (64) are respectively arranged between the reverse gear fork shaft (21) and the 1/2 gear fork shaft (23), between the 1/2 gear fork shaft (23) and the 3/4 gear fork shaft (25) and between the 3/4 gear fork shaft (25) and the neutral position alarm (12); interlocking pins (65) are arranged on the 1/2-gear fork shaft (23) and the 3/4-gear fork shaft (25); the upper cover (1) is provided with a protruding portion (61), a self-locking spring (63) is arranged in the protruding portion (61), one side of the self-locking steel ball (62) abuts against the self-locking spring (63), and the other side of the self-locking steel ball (62) abuts against a corresponding fork shaft.