阅读说明：本技术 一种商用车变速器用两轴滑套式取力器 (Two-shaft sliding sleeve type power takeoff for commercial vehicle transmission ) 是由 俞晓波 李振省 马利东 王姣 郑文超 于 2020-10-21 设计创作，主要内容包括：本发明属于车辆变速器技术领域,具体是一种商用车变速器用两轴滑套式取力器。包括与变速器内齿轮啮合的取力器齿轮,取力器齿轮与传动齿轮同轴设置,传动齿轮与输出齿轮啮合,输出齿轮空套于输出轴上,输出齿轮上加工有内花键,输出轴两端加工有外花键,输出轴通过输出轴承安装于壳体内,输出轴一端通过外花键与输出法兰配合,输出轴另一端通过外花键与滑套配合,滑套同时与输出齿轮的内花键配合,滑套通过换挡轴与活塞固定连接,并通过铆钉径向固定,滑套通过支撑轴承安装于壳体上,活塞设置在气缸内,气缸外侧设置开孔,开孔外安装取力器开关。本发明提高了开关寿命,提高了通用性。(The invention belongs to the technical field of vehicle transmissions, and particularly relates to a double-shaft sliding sleeve type power takeoff for a commercial vehicle transmission. Including the power takeoff gear with derailleur internal gear meshing, power takeoff gear and the coaxial setting of drive gear, drive gear and output gear meshing, output gear empty sleeve is on the output shaft, processing has the internal spline on the output gear, the processing of output shaft both ends has the external spline, the output shaft passes through output bearing and installs in the casing, external spline and output flange cooperation are passed through to output shaft one end, the output shaft other end passes through external spline and sliding sleeve cooperation, the sliding sleeve simultaneously with output gear's internal spline cooperation, the sliding sleeve passes through selector shaft and piston fixed connection, and through rivet radial fixation, the sliding sleeve passes through support bearing and installs on the casing, the piston sets up in the cylinder, the cylinder outside sets up the trompil, the power takeoff switch is installed outside the trompil. The invention prolongs the service life of the switch and improves the universality.)

1. The utility model provides a two axletree sliding sleeve formula power takeoff for commercial car derailleur which characterized in that: the power takeoff gear comprises a power takeoff gear (1) meshed with an internal gear of a transmission, the power takeoff gear (1) and a transmission gear (2) are coaxially arranged, the transmission gear (2) is meshed with an output gear (7), the output gear (7) is sleeved on an output shaft (9) in a hollow mode, an internal spline is processed on the output gear (7), external splines are processed at two ends of the output shaft (9), the output shaft (9) is installed in a shell through an output bearing (8), one end of the output shaft (9) is matched with an output flange (19) through the external spline, the other end of the output shaft (9) is matched with a sliding sleeve (13) through the external spline, the sliding sleeve (13) is simultaneously matched with the internal spline of the output gear (7), the sliding sleeve (13) is fixedly connected with a piston (15) through a gear shifting shaft (14) and radially fixed through a rivet (12), and the sliding sleeve (13) is, the piston (15) is arranged in the cylinder (16), the outer side of the cylinder (16) is provided with an opening, and a power takeoff switch (18) is arranged outside the opening.

2. The two-shaft sliding sleeve type power takeoff for the commercial vehicle transmission as claimed in claim 1, wherein: a steel ball (17) is arranged in the opening, and the steel ball (17) is positioned between the power takeoff switch (18) and the piston (15) and is in contact with the power takeoff switch and the piston.

3. The two-shaft sliding sleeve type power takeoff for the commercial vehicle transmission as claimed in claim 1, wherein: the power takeoff gear (1) and the transmission gear (2) are helical teeth, a thrust needle bearing (4) and a gasket (5) are arranged on one side, in contact with the shell, of the transmission gear (2), and a needle bearing (3) is arranged on one side, in contact with the shell, of the power takeoff gear (1).

Technical Field

The invention belongs to the technical field of vehicle transmissions, and particularly relates to a double-shaft sliding sleeve type power takeoff for a commercial vehicle transmission.

Background

With the continuous development of domestic commercial vehicle transmissions and the increasing of national emission standards, the overall structure of a commercial vehicle is continuously changed, and the invention has the advantages that the power takeoff is simple in structure, small in overall size, capable of reducing interference risks with the whole vehicle, universal on the left side and the right side of the transmission, capable of ensuring the functions of in-place gear engagement and the like, and the requirements of different whole vehicles on the power takeoff are met.

Disclosure of Invention

The invention aims to solve the problems and provides a two-shaft sliding sleeve type power takeoff for a commercial vehicle transmission.

The invention adopts the following technical scheme: the utility model provides a diaxon sliding sleeve formula power takeoff for commercial car derailleur, include the power takeoff gear with derailleur internal gear meshing, power takeoff gear and the coaxial setting of drive gear, drive gear and output gear meshing, the empty cover of output gear is on the output shaft, processing has the internal spline on the output gear, the processing of output shaft both ends has the external spline, the output shaft passes through output bearing and installs in the casing, external spline and output flange cooperation are passed through to output shaft one end, the output shaft other end passes through the external spline and cooperates with the sliding sleeve, the sliding sleeve simultaneously with output gear's internal spline cooperation, the sliding sleeve passes through selector shaft and piston fixed connection, and through rivet radial fixation, the sliding sleeve passes through support bearing and installs on the casing, the piston sets up in the cylinder, the cylinder outside sets up the trompil.

Furthermore, a steel ball is arranged in the opening and is positioned between the power takeoff switch and the piston and is in contact with the power takeoff switch and the piston.

Furthermore, the power takeoff gear and the transmission gear are helical teeth, a thrust needle bearing and a gasket are arranged on one side, which is in contact with the shell, of the transmission gear, and a needle bearing is arranged on one side, which is in contact with the shell, of the power takeoff gear.

When high-pressure gas does not exist in the cylinder, the internal gear of the transmission drives the power takeoff gear and the transmission gear to drive the output gear to idle on the output shaft, and no torque is output; when high-pressure gas is filled into the cylinder, the piston is pushed to move, so that the gear shifting shaft is pushed to push the sliding sleeve, an external spline of the sliding sleeve is matched with an internal spline of the output shaft, and the power transmission route is power takeoff gear → transmission gear → output gear → sliding sleeve → output shaft → output flange, so that torque output is realized. In order to be meshed with an internal gear of the transmission and increase the output torque of the power takeoff, a gear of the power takeoff and a gear of the transmission gear are designed into helical teeth, but the helical teeth can generate axial force to wear a shell, and therefore a thrust needle roller bearing and a gasket are additionally arranged on one side of the transmission gear.

Compared with the prior art, the invention changes the original shifting fork gear shifting mode into sliding sleeve gear shifting, the sliding sleeve is arranged on the output shaft, and the original shifting fork, the original fork shaft and the assembly part processed on the shell can be completely removed by adopting the gear shifting mode, and the arc transition is adopted, so that the external size of the power takeoff is reduced, the assembly of the whole vehicle is facilitated, and meanwhile, the space can be saved for other parts of the whole vehicle.

The invention removes the shifting fork and the fork shaft, and simultaneously, the installation position and the mode of the switch are changed. The switch is arranged at the position of the cylinder, and the power takeoff can be ensured to be in place by the action of the piston, the steel ball and the switch. Meanwhile, the sliding friction is changed into rolling friction by the additionally arranged steel ball, so that the service life of the switch is prolonged.

According to the invention, after the shifting fork and the fork shaft are removed and the mounting part of the switch is changed, no obvious upper and lower parts exist, and the orientation problem of a switch joint also does not exist, so that the assembly can be switched on two sides of the transmission, multiple development for left and right parts is not needed, and the universality is improved.

Drawings

FIG. 1 is a main structural sectional view of the patented product of the invention;

FIG. 2 is a power take-off power transmission scheme;

in the figure, 1-power takeoff gear, 2-transmission gear, 3-needle bearing, 4-thrust needle bearing, 5-gasket, 6-shell, 7-output gear, 8-output bearing, 9-output shaft, 10-output oil seal, 11-support bearing, 12-rivet, 13-sliding sleeve, 14-gear shifting shaft, 15-piston, 16-cylinder, 16-gear shifting fork shaft, 17-steel ball, 18-power takeoff switch and 19-output flange.

Detailed Description

As shown in fig. 2, a two-shaft sliding sleeve type power takeoff for a commercial vehicle transmission comprises a power takeoff gear 1 engaged with an internal gear of the transmission, the power takeoff gear 1 and a transmission gear 2 are coaxially arranged, the transmission gear 2 is engaged with an output gear 7, the output gear 7 is freely sleeved on an output shaft 9, an internal spline is processed on the output gear 7, external splines are processed at two ends of the output shaft 9, the output shaft 9 is installed in a shell through an output bearing 8, one end of the output shaft 9 is matched with an output flange 19 through the external spline, the other end of the output shaft 9 is matched with a sliding sleeve 13 through the external spline, the sliding sleeve 13 is simultaneously matched with the internal spline of the output gear 7, the sliding sleeve 13 is fixedly connected with a piston 15, and radially fixed by a rivet 12, a sliding sleeve 13 is arranged on the shell through a supporting bearing 11, a piston 15 is arranged in a cylinder 16, the outer side of the cylinder 16 is provided with an opening, and a power takeoff switch 18 is arranged outside the opening.

A steel ball 17 is arranged in the opening, and the steel ball 17 is positioned between and contacted with the power takeoff switch 18 and the piston 15.

The power takeoff gear 1 and the transmission gear 2 are helical teeth, a thrust needle bearing 4 and a gasket 5 are arranged on one side, in contact with the shell, of the transmission gear 2, and a needle bearing 3 is arranged on one side, in contact with the shell, of the power takeoff gear 1.

When high-pressure gas does not exist in the cylinder 16, the internal gear of the transmission drives the power takeoff gear 1 and the transmission gear 2 to drive the output gear 7 to idle on the output shaft 9, and no torque is output; when the cylinder 16 is filled with high-pressure gas, the pushing piston 15 moves to push the shift shaft 14 and then the sliding sleeve 13, so that the external spline of the sliding sleeve 13 is in spline fit with the internal spline of the output shaft 9, and the power transmission route is power takeoff gear 1 → transmission gear 2 → output gear 7 → sliding sleeve 13 → output shaft 9 → output flange 19, thereby realizing torque output. In order to be meshed with an internal gear of a transmission and increase the output torque of a power takeoff, a gear 1 of the power takeoff and a gear 2 of a transmission gear are designed into helical teeth, but the helical teeth can generate axial force to cause abrasion to a shell 6, and therefore a needle thrust bearing 4 and a gasket 5 are additionally arranged on one side of the transmission gear 2.

This power takeoff casing outside transition is smooth, even, do not have protrudingly, and the mode of putting into gear simultaneously compares the common power takeoff in market and changes, does not have shift fork and the fork axle of shifting, and newly-increased sliding sleeve 13 and the 14 realization of the gear shifting axle of shifting are put into gear. This mode reduce cost, weight reduction promotes reliability and the performance of shifting.

In order to ensure that the gear is put in place, a power takeoff switch 18 is additionally arranged, after the gear is put in place, the switch is switched on, and meanwhile, a steel ball 17 is additionally arranged between the piston 15 and the power takeoff switch 18, so that sliding friction is changed into rolling friction, and the abrasion to the piston 15 is reduced.

The outer side of the shell is uniformly transited by an arc, so that the whole power takeoff is small in size. If the power takeoff rotates to the other side along the central line of the output shaft of the transmission, the power takeoff can still normally work, so that the function of the left side and the right side of the transmission which are universal is realized, the cost is reduced, and the adaptability of products is improved.