CN216200349U

CN216200349U - Gearbox structure and car

Info

Publication number: CN216200349U
Application number: CN202122464412.9U
Authority: CN
Inventors: 黎谦; 韦进光; 黄振之
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-04-05
Anticipated expiration: 2031-10-13

Abstract

The utility model relates to the technical field of automobile gearboxes, in particular to a gearbox structure and an automobile. The gearbox structure comprises a shell, an input shaft, an output shaft, a middle shaft and an idler shaft, wherein the input shaft, the output shaft, the middle shaft and the idler shaft are connected in the shell; the middle shaft is connected with the partition plate through a middle shaft second bearing fixedly arranged on the partition plate, and the input shaft is connected with the partition plate through an input shaft second bearing fixedly arranged on the partition plate.

Description

Gearbox structure and car

Technical Field

The utility model relates to the technical field of automobile gearboxes, in particular to a gearbox structure and an automobile.

Background

The automobile gear box is used to change the torque and rotation speed of the engine to the driving wheel, and aims at making the automobile obtain different traction force and speed and making the engine work in the most favorable working condition range. The gearbox is very various, and the application relates to a front-drive rear-drive intermediate shaft type six-gear gearbox.

In the prior art transmission structure, as shown in fig. 1, the front end of an input shaft 10a is connected with a front housing 1a through an input shaft front bearing 12a, and the rear end of the input shaft 10a is connected with an output shaft 7a through a cylindrical roller bearing 9 a; the front end of the output shaft 7a is connected with the middle shell 3a through an output shaft front bearing 8a, and the rear end of the output shaft 7a is connected with the rear shell 5a through an output shaft rear bearing 6 a; two ends of the intermediate shaft 4a are respectively connected with the front shell 1a and the middle shell 3a through intermediate shaft bearings 2 a; the front end of the idle wheel shaft system 11a is in small clearance fit with the front shell 1a, and the rear end of the idle wheel shaft system 11a is connected with the middle shell 3a through bolts; the front case 1a and the middle case 3a, and the middle case 3a and the rear case 5a are all connected by bolts.

The gearbox structure has the following defects:

the arrangement distribution is unreasonable, the span of the middle shell is too large, the bearing installation span is large, the shaft support rigidity of the transmission is insufficient, and the deflection is too large in the working process, so that the technical problems of gear disengagement risk, abnormal wear of a gear bearing and poor NVH (such as gear knocking and gear squeaking) performance are caused.

Therefore, there is a need for a new transmission structure that overcomes the deficiencies of the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model provides a gearbox structure.

Another object of the present invention is to provide a vehicle having the above transmission structure.

The technical scheme of the utility model is as follows:

in order to achieve the first object, the utility model provides a gearbox structure, which comprises a shell, an input shaft, an output shaft, an intermediate shaft and an idler shaft, wherein the input shaft, the output shaft, the intermediate shaft and the idler shaft are connected in the shell; the middle shaft is connected with the partition plate through a middle shaft second bearing fixedly arranged on the partition plate, and the input shaft is connected with the partition plate through an input shaft second bearing fixedly arranged on the partition plate.

Furthermore, the front end of the input shaft is connected with the front shell through a first input shaft bearing, the middle part of the input shaft is connected with the partition plate through a second input shaft bearing, and the rear end of the input shaft is connected with the output shaft through a connecting bearing.

Further, the connection bearing is a cylindrical roller bearing.

Furthermore, the front end of the output shaft is connected with the middle shell through an output shaft first bearing, and the rear end of the output shaft is connected with the rear shell through an output shaft second bearing.

Furthermore, the front end of the intermediate shaft is connected with the front shell through an intermediate shaft first bearing, the middle part of the intermediate shaft is connected with the partition plate through an intermediate shaft second bearing, and the rear end of the intermediate shaft is connected with the middle shell through an intermediate shaft third bearing.

Further, the front end of the idler shaft is in clearance fit connection with the front shell, and the rear end of the idler shaft is connected with the front shell through bolts.

Further, the front shell, the partition plate, the middle shell and the rear shell are connected in pairs by bolts in sequence.

In order to achieve the second object, the present invention provides an automobile comprising the transmission structure.

The utility model achieves the following beneficial effects:

the technical scheme adopted by the embodiment of the utility model effectively optimizes the gearbox structure, solves the defect that a long shaft is not supported inside due to unreasonable arrangement of the outer shell, and greatly reduces the problems of insufficient shaft support rigidity, overlarge deflection in the working process, gear disengagement risk, abnormal wear of a gear bearing, poor NVH (such as gear knocking and gear squeaking) and the like caused by large mounting span of a gear shaft.

Drawings

Fig. 1 is a schematic diagram of a transmission structure in the prior art.

Fig. 2 is a schematic view of the overall structure of a transmission structure according to an embodiment of the present invention.

In the figure, 1, front case; 2. an intermediate shaft first bearing; 3. an intermediate shaft; 4. a partition plate; 5. an intermediate shaft second bearing; 6. a middle shell; 7. a rear housing; 8. an output shaft second bearing; 9. an output shaft; 10. an output shaft first bearing; 11. connecting a bearing; 12. an input shaft second bearing; 13. an input shaft; 14. an idler shaft; 15. an input shaft first bearing; 16. the intermediate shaft is a third bearing.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 2, an embodiment of the present invention provides a transmission structure, which includes a housing, an input shaft 13 connected in the housing, an output shaft 9, an intermediate shaft 3, and an idler shaft 14, wherein the input shaft 13 is connected to the output shaft 9, the housing includes a front housing 1, a middle housing 6, and a rear housing 7 in sequence, the housing further includes a partition plate 4, and the partition plate 4 is disposed between the front housing 1 and the middle housing 6; the intermediate shaft 3 is connected with the partition plate 4 through an intermediate shaft second bearing 5 fixedly arranged on the partition plate 4, and the input shaft 13 is connected with the partition plate 4 through an input shaft second bearing 12 fixedly arranged on the partition plate 4.

Specifically, the front end of the input shaft 13 is connected with the front housing 1 through the input shaft first bearing 15, the middle part of the input shaft is connected with the partition plate 4 through the input shaft second bearing 12, the rear end of the input shaft is connected with the output shaft 9 through the connecting bearing 11, and the connecting bearing 11 can be a cylindrical roller bearing. The front end of the output shaft 9 is connected with the middle housing 6 through an output shaft first bearing 10, and the rear end is connected with the rear housing 7 through an output shaft second bearing 8. The front end of jackshaft 3 is connected with procapsid 1 through jackshaft first bearing 2, and the middle part is connected with baffle 4 through jackshaft second bearing 5, and the rear end is connected with well casing 6 through jackshaft third bearing 16. The front end of the idler shaft 14 is connected with the front housing 1 in a close clearance fit mode, and the rear end of the idler shaft is connected with the front housing 1 through bolts. The front shell 1, the partition plate 4 and the middle shell 6 are connected in pairs in sequence through bolts, and the middle shell 6 is connected with the rear shell 7 through bolts.

Compared with the prior art, the embodiment of the utility model redistributes the shells on the premise of ensuring the overall length of the gearbox to be unchanged, the front shell 1 is lengthened to the middle position, the bearing support is added at the middle position in the front shell and is used for installing the input shaft second bearing 12 and the intermediate shaft first bearing 2 to play roles of fixing and limiting, and particularly, the input shaft second bearing 12 and the intermediate shaft first bearing 2 are respectively connected with the bearing support in a press-fitting mode; the middle housing 6 is shortened and the rear housing 7 is modified accordingly. Increase baffle 4 between preceding casing 1 and well casing 6, baffle 4 mainly used installs input shaft second bearing 12 and jackshaft second bearing 5, provides the supporting role for input shaft 13 and jackshaft 3, specifically, input shaft second bearing 12, jackshaft second bearing 5 are connected with baffle 4 through the mode of pressure equipment respectively.

The input shaft 13 is provided with the input shaft first bearing 15, the input shaft second bearing 12 and the connecting bearing 11, and compared with the prior art, the mounting bearing span is reduced, and the rigidity is improved. The intermediate shaft 3 is provided with the intermediate shaft first bearing 2, the intermediate shaft second bearing 5 and the intermediate shaft third bearing 16, and compared with the prior art, the span of the installation bearing is reduced, and the rigidity is improved. An input shaft second bearing 12 and an intermediate shaft second bearing 5 are arranged between the partition plate 4 and the input shaft 13 and between the partition plate and the intermediate shaft 3, so that the support rigidity of the input shaft 13 and the intermediate shaft 3 is improved, and the deflection of the input shaft 13 and the intermediate shaft 3 in the working process is reduced, thereby reducing the gear-disengaging risk, improving the abrasion of a gear bearing and improving the NVH performance.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A transmission structure characterized by: the gear box comprises a shell, an input shaft (13), an output shaft (9), an intermediate shaft (3) and an idler shaft (14), wherein the input shaft (13), the output shaft (9), the intermediate shaft (9) and the idler shaft (14) are connected in the shell, the shell sequentially comprises a front shell (1), a middle shell (6) and a rear shell (7), the shell further comprises a partition plate (4), and the partition plate (4) is arranged between the front shell (1) and the middle shell (6); the middle shaft (3) is connected with the partition plate (4) through a middle shaft second bearing (5) fixedly arranged on the partition plate (4), and the input shaft (13) is connected with the partition plate (4) through an input shaft second bearing (12) fixedly arranged on the partition plate (4).

2. A transmission construction according to claim 1 wherein: the front end of the input shaft (13) is connected with the front shell (1) through a first input shaft bearing (15), the middle part of the input shaft is connected with the partition plate (4) through a second input shaft bearing (12), and the rear end of the input shaft is connected with the output shaft (9) through a connecting bearing (11).

3. A transmission construction according to claim 2 wherein: the connecting bearing (11) is a cylindrical roller bearing.

4. A transmission construction according to claim 1 wherein: the front end of the output shaft (9) is connected with the middle shell (6) through an output shaft first bearing (10), and the rear end of the output shaft is connected with the rear shell (7) through an output shaft second bearing (8).

5. A transmission construction according to claim 1 wherein: the front end of the intermediate shaft (3) is connected with the front shell (1) through an intermediate shaft first bearing (2), the middle part of the intermediate shaft is connected with the partition plate (4) through an intermediate shaft second bearing (5), and the rear end of the intermediate shaft is connected with the middle shell (6) through an intermediate shaft third bearing (16).

6. A transmission construction according to claim 1 wherein: the front end of the idler shaft (14) is in clearance fit connection with the front shell (1), and the rear end of the idler shaft is connected with the front shell (1) through bolts.

7. A transmission construction according to claim 1 wherein: the front shell (1), the partition plate (4), the middle shell (6) and the rear shell (7) are connected in pairs through bolts in sequence.

8. An automobile, characterized in that: comprising a gearbox construction according to any of the claims 1-7.