CN114087350A

CN114087350A - AMT gearbox

Info

Publication number: CN114087350A
Application number: CN202111407191.XA
Authority: CN
Inventors: 张海明; 吴利霞; 王建芳; 蔡庆; 叶鹏彦
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: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-02-25

Abstract

The invention provides an AMT gearbox, relating to the field of vehicles, and adopting the following scheme: the brake device comprises a front shell, a brake bearing cover, a cylinder cover and a brake piston, wherein the brake bearing cover and the cylinder cover are fixedly connected to the front shell, an installation inner cavity is formed between the brake bearing cover and the cylinder cover, a friction plate and a brake plate are arranged in the installation inner cavity, the shaft end part of an intermediate shaft extends into the installation inner cavity, and the friction plate and the brake plate are installed on the shaft end part of the intermediate shaft; the front shell is provided with an oil storage disc, a first oil duct is arranged in the front shell, the oil storage disc is communicated with the first oil duct, a second oil duct is arranged on the brake bearing cover, one end of the second oil duct is communicated with the first oil duct, the other end of the second oil duct is communicated with the installation inner cavity, the brake bearing cover and the bottom of the front shell are provided with oil return grooves, and lubricating oil in the oil storage disc can flow into the first oil duct, the second oil duct and the installation cavity in sequence under the action of self gravity.

Description

AMT gearbox

Technical Field

The invention relates to the field of vehicles, in particular to an AMT gearbox.

Background

Gears, bearings, synchronizers and even brakes used in AMT transmissions in heavy truck transmissions are typically force lubricated by adding an oil pump. The gearbox used by the medium and light truck is small in size, splash lubrication can basically meet the lubrication of a transmission part, the necessity of an oil pump is not high, and the manufacturing cost is increased.

Especially, when the whole vehicle runs on a steep slope, a small part of transmission parts are higher than an oil level, the contact area of splashed lubricating oil in the gearbox is limited, and the generated heat cannot be taken away in time, so that parts are ablated. The AMT gearbox brake is easy to lose efficacy due to insufficient lubrication under the working condition of frequent work (in the process of gear shifting). This is the current state of the art.

Therefore, aiming at the current situation that insufficient lubrication occurs in the brake used by the AMT gearbox in the prior art, the problem that the AMT gearbox which is designed with the oil duct with the special structure and effectively solves the problem of part ablation caused by insufficient lubrication is urgently needed to be solved.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an AMT (automated mechanical transmission) so as to solve the problem that a brake used by the conventional AMT is insufficient in lubrication.

The technical scheme adopted by the invention for solving the technical problems is as follows: an AMT gearbox comprises a front shell, a brake bearing cap, a cylinder cover and a brake piston, wherein the brake bearing cap and the cylinder cover are fixedly connected to the front shell, an installation inner cavity is formed between the brake bearing cap and the cylinder cover, a friction plate and a brake plate are arranged in the installation inner cavity, the shaft end part of an intermediate shaft extends into the installation inner cavity, and the friction plate and the brake plate are installed on the shaft end part of the intermediate shaft; the front shell is provided with an oil storage disc, a first oil duct is arranged in the front shell, the oil storage disc is communicated with the first oil duct, a second oil duct is arranged on the brake bearing cover, one end of the second oil duct is communicated with the first oil duct, the other end of the second oil duct is communicated with the installation inner cavity, the brake bearing cover and the bottom of the front shell are provided with oil return grooves, and lubricating oil in the oil storage disc can flow into the first oil duct, the second oil duct and the installation cavity in sequence under the action of self gravity. When the gearbox rotates at a high speed along with an engine, splashed lubricating oil can be gathered to the oil storage disc, the lubricating oil can flow to a second oil duct in a brake bearing cover along a first oil duct (arrow a in figure 2) in the front shell by means of the gravity of the lubricating oil, then the lubricating oil enters an installation inner cavity provided with a friction plate and a brake plate from the brake bearing cover (arrow b in figure 3), when the brake is in a free state, the lubricating oil can be immersed along the friction plate and a brake plate gap, when the brake works, a brake piston is pushed by air pressure, the friction plate and the brake plate are both compressed backwards, redundant lubricating oil can return to the gearbox from the brake bearing cover (arrow c in figure 3) and an oil return groove at the bottom of the front shell, and the lubrication of the brake is realized in the whole process. Through on the basis of the existing parts, the structure of the parts is changed, and the special oil duct is designed, so that the friction plate and the brake pad in the brake are sufficiently lubricated, the generated heat is taken away by lubricating oil in time, the ablation fault caused by insufficient lubrication of the brake is effectively solved, and the characteristics of quick implementation, low manufacturing cost and the like are realized.

Furthermore, the first oil duct is arranged in a downward inclined mode, and the included angle between the first oil duct and the vertical direction is 8-15 degrees. Further, the included angle between the first oil duct and the vertical direction is 11 degrees. Through the setting of angle to adaptation structural feature, the upper end is with guaranteeing compact structure and the reliable flow of lubricating oil under the prerequisite that the oil storage dish communicates, the lower extreme has the second oil duct to communicate. Furthermore, the second oil duct is provided with a corner, the upper end of the second oil duct is communicated with the first oil duct, the lower end of the second oil duct is communicated with the installation inner cavity, and the inner diameter of the upper end of the second oil duct is smaller than that of the lower end of the second oil duct. The corners are inclined in an increasing mode, the thinner structure of the brake bearing cover is adapted, and flowing of lubricating oil is facilitated. The design standard of the oil duct is to ensure that lubricating oil still normally flows into the brake when the whole vehicle climbs.

Furthermore, an oil return groove is formed in the position of a bearing hole for installing the brake on the front shell.

Further, a gasket a is provided between the front housing and the brake bearing cap. And a gasket B is arranged between the brake bearing cover and the cylinder cover. The effect of ensuring sealing is achieved.

Furthermore, the friction plate is connected with the shaft end part of the intermediate shaft in a spline fit mode.

Furthermore, a spring is installed in the intermediate shaft, a brake piston is arranged in the cylinder cover, and the spring is connected with the brake piston through a top pin for limiting.

Further, the oil storage plate is fixed on the front shell through 2M 6 screws, the connecting piece is a screw, and the oil storage plate is designed to be appropriate in size, so that the gathered oil quantity can be ensured to be sufficient, and the lubrication of other transmission parts cannot be influenced.

According to the technical scheme, the invention has the following advantages:

this scheme provides an AMT gearbox, when the gearbox rotates along with the engine is high-speed, the lubricating oil that splashes can assemble the oil storage dish, rely on the gravity of lubricating oil self, can flow to the second oil duct in the stopper bearing cap along the first oil duct in the procapsid, then lubricating oil enters into from stopper bearing cap and is provided with the friction disc, the installation inner chamber of braking piece, when stopper free state, lubricating oil can be along the friction disc, the braking piece gap is soaked, the stopper during operation, promote the stopper piston through atmospheric pressure, the friction disc, the braking piece is all compressed backward, stopper bearing cap can be followed to unnecessary lubricating oil, the oil gallery of procapsid flow bottom returns to in the gearbox, whole process realizes that the stopper is lubricated. Through on the basis of the existing parts, the structure of the parts is changed, and the special oil duct is designed, so that the friction plate and the brake pad in the brake are sufficiently lubricated, the generated heat is taken away by lubricating oil in time, the ablation fault caused by insufficient lubrication of the brake is effectively solved, and the characteristics of quick implementation, low manufacturing cost and the like are realized.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the description will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken at a-a in fig. 1.

Fig. 3 is a schematic view of an external structure of a brake according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of the internal structure of a transmission according to an embodiment of the present invention.

In the figure, 1-connector, 2-oil pan, 3-front housing, 4-gasket a, 5-brake bearing cap, 6-gasket B, 7-cylinder cap, 8-brake piston, 9-knock pin, 10-spring, 11-intermediate shaft, 12-friction plate, 13-brake plate, 14, first oil channel, 15, second oil channel, 16, oil return groove.

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 accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 1 to 4, the present embodiment provides an AMT transmission, which includes a front housing 3, a brake bearing cap 5, a cylinder head 7 and a brake piston 8, the brake bearing cap 5 and the cylinder head 7 are fixedly connected to the front housing 3, and an installation cavity is formed between the front housing 3 and the cylinder head 7, a friction plate 12 and a brake plate 13 are arranged in the installation cavity, a shaft end of an intermediate shaft 11 extends into the installation cavity, the friction plate 12 and the brake plate 13 are installed on the shaft end of the intermediate shaft 11, the friction plate 12 is connected with the shaft end of the intermediate shaft 11 through spline fitting, a spring 10 is installed in the intermediate shaft 11, the brake piston 8 is arranged in the cylinder head 7, and the spring 10 is connected with the brake piston 8 through a knock pin 9 for limiting. Install oil storage plate 2 on the procapsid 3, oil storage plate 2 passes through 2M 6 fix with screws on procapsid 3, and oil storage plate 2 design size is suitable, can guarantee that the oil mass of assembling is sufficient and can not influence the lubrication of other driving medium.

Wherein, be provided with first oil duct 14 in the procapsid 3, oil storage dish 2 and first oil duct 14 intercommunication, be provided with second oil duct 15 on the stopper bearing cap 5, the one end and the first oil duct 14 intercommunication of second oil duct 15, the other end and the installation inner chamber intercommunication of second oil duct 15, stopper bearing cap 5 and procapsid 3 bottom are provided with oil return groove 16, specifically, the dead eye position department of installation stopper sets up oil return groove 16 on procapsid 3, lubricating oil in the oil storage dish 2 can flow into first oil duct 14, second oil duct 15, the installation cavity under self action of gravity in proper order. First oil duct 14 downward sloping sets up, and first oil duct 14 is at 8 degrees to 15 degrees with the contained angle of vertical direction, and preferred in this scheme is 11 degrees with the contained angle of vertical direction for first oil duct 14 to adaptation structural feature, upper end and oil storage disc 2 intercommunication, the lower extreme have the reliable flow of assurance compact structure and lubricating oil under the prerequisite of second oil duct 15 intercommunication. The second oil channel 15 is provided with a corner, the upper end of the second oil channel 15 is communicated with the first oil channel 14, the lower end of the second oil channel 15 is communicated with the installation inner cavity, the inner diameter of the upper end of the second oil channel 15 is smaller than that of the lower end, and the corner is suitable for a thinner structure of the brake bearing cover 5 to facilitate flowing of lubricating oil. The design standard of the oil duct is to ensure that lubricating oil still normally flows into the brake when the whole vehicle climbs.

Further, a gasket a4 is provided between front housing 3 and brake bearing cover 5, and a gasket B6 is provided between brake bearing cover 5 and cylinder head 7, thereby achieving the effect of ensuring sealing.

The working principle is as follows: when the gearbox rotates with an engine at a high speed, splashed lubricating oil can be gathered to the oil storage disc 2, the splashed lubricating oil can flow to the second oil duct 15 in the brake bearing cover 5 along the first oil duct 14 (arrow a in fig. 2) in the front shell 3 by means of the gravity of the lubricating oil, then the lubricating oil enters the installation inner cavity provided with the friction plate 12 and the brake plate 13 from the brake bearing cover 5 (arrow b in fig. 3), when the brake is in a free state, the lubricating oil can be immersed along the gap between the friction plate 12 and the brake plate 13, when the brake works, the brake piston 8 is pushed by air pressure, the friction plate 12 and the brake plate 13 are both compressed backwards, redundant lubricating oil can return to the gearbox from the brake bearing cover 5 (arrow c in fig. 3) and the oil return groove 16 at the bottom of the front shell 3, and the lubrication of the brake is realized in the whole process.

The terms "upper", "lower", "outside", "inside", and the like in the description and claims of the present invention and the above-described drawings (if any) are used for distinguishing relative positions without necessarily being construed qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

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. An AMT gearbox is characterized by comprising a front shell, a brake bearing cap, a cylinder cover and a brake piston, wherein the brake bearing cap and the cylinder cover are fixedly connected to the front shell, an installation inner cavity is formed between the brake bearing cap and the cylinder cover, a friction plate and a braking plate are arranged in the installation inner cavity, the shaft end part of a middle shaft extends into the installation inner cavity, and the friction plate and the braking plate are installed on the shaft end part of the middle shaft; the front shell is provided with an oil storage disc, a first oil duct is arranged in the front shell, the oil storage disc is communicated with the first oil duct, a second oil duct is arranged on the brake bearing cover, one end of the second oil duct is communicated with the first oil duct, the other end of the second oil duct is communicated with the installation inner cavity, the brake bearing cover and the bottom of the front shell are provided with oil return grooves, and lubricating oil in the oil storage disc can flow into the first oil duct, the second oil duct and the installation cavity in sequence under the action of self gravity.

2. The AMT transmission of claim 1, wherein the first oil passage is inclined downward, and the angle between the first oil passage and the vertical direction is 8 to 15 degrees.

3. The AMT transmission of claim 2, wherein the first oil passage is angled at 11 degrees from vertical.

4. The AMT transmission of claim 2, wherein the second oil passage has a corner, an upper end of the second oil passage communicates with the first oil passage, a lower end of the second oil passage communicates with the mounting cavity, and an inner diameter of the upper end of the second oil passage is smaller than an inner diameter of the lower end.

5. The AMT transmission according to any one of claims 1-4, wherein oil return grooves are provided in the front housing at the location of the bearing holes for mounting the brake.

6. The AMT gearbox according to any one of claims 1-4, wherein a spacer a is provided between the front housing and the brake bearing cap.

7. AMT gearbox according to any of the claims 1 to 4, characterized in that a gasket B is provided between the brake bearing cover and the cylinder cover.

8. An AMT gearbox according to any one of claims 1 to 4 in which the friction plates are connected to the shaft end of the intermediate shaft by a spline fit.

9. The AMT gearbox according to any one of claims 1 to 4, wherein a spring is mounted in the intermediate shaft and a brake piston is provided in the cylinder head, the spring being restrained by a knock pin in connection with the brake piston.

10. The AMT gearbox according to any one of claims 1 to 4, wherein the reservoir plate is secured to the front housing by a coupling member.