CN216241937U

CN216241937U - Intermediate shaft brake assembly

Info

Publication number: CN216241937U
Application number: CN202122842692.2U
Authority: CN
Inventors: 高志飞; 赵达; 李凯鹏; 王巍巍; 周雄宽; 杨昆; 刘立博
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-08
Anticipated expiration: 2031-11-19

Abstract

The utility model relates to the technical field of gearboxes, and particularly discloses an intermediate shaft brake assembly. The assembly comprises an integrated seat provided with a containing groove, a piston provided with a reset unit and a brake component; a cylinder barrel groove is formed in the bottom of the accommodating groove, the side wall of the accommodating groove is communicated with the oil supply channel, the bottom of the cylinder barrel groove is communicated with the air supply channel, and a top cover piece is mounted at the opening of the accommodating groove; the outer peripheral surface of the piston is in sealing fit with the inner side wall of the cylinder barrel groove and can slide relative to the cylinder barrel groove along the axial direction, and the reset unit drives the piston and enables the piston to abut against the bottom of the cylinder barrel groove; the brake assembly is arranged in the accommodating groove and comprises N friction plates and N +1 steel sheet pieces which are annular pieces, the friction plates and the steel sheet pieces are sequentially and alternately arranged and coaxially stacked, the piston can drive the end face of the brake assembly to enable the brake assembly to be abutted against the top cover piece, and N is a positive integer. Through the optimization of the structure on the integrated seat, the working reliability of the assembly can be effectively improved, the occupied space is reduced, and the braking efficiency is improved.

Description

Intermediate shaft brake assembly

Technical Field

The utility model relates to the technical field of gearboxes, in particular to an intermediate shaft brake assembly.

Background

At present, a main box of a partial Mechanical automatic transmission (AMT) is not provided with a synchronizer, gear shifting is carried out by adopting an engaging sleeve, and the rotating speed of an intermediate shaft is reduced to a reasonable rotating speed through an intermediate shaft brake during gear shifting, so that relatively stable gear shifting can be realized. Therefore, each time the intermediate shaft brake works, the friction torque between the friction plate and the steel sheet is transmitted to the side surface of the brake groove on the brake shell through the steel sheet clamping jaw on the steel sheet.

However, since the brake housing is generally made of aluminum alloy and the hardness of the brake housing is lower than that of the steel sheet, the steel sheet clamping jaws abrade the side surfaces of the brake groove to form step-shaped abrasion traces after long-term use. When the intermediate shaft brake works, the steel sheet needs to move axially to be close to the friction sheet, so that step-shaped abrasion traces on the side surfaces of the braking grooves can prevent the steel sheet from moving axially, so that the friction torque between the friction sheet and the steel sheet cannot be built quickly, and the braking efficiency is reduced; furthermore, the stepped wear marks on the sides of the braking grooves can deform the steel sheet, thereby disabling the intermediate shaft brake.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an intermediate shaft brake assembly to solve the problems of large occupied space, complex structure and high failure probability of the conventional intermediate shaft brake.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an intermediate shaft brake assembly comprises an integrated seat, a piston and a brake component; the integrated seat is provided with an accommodating groove, the bottom of the accommodating groove is provided with a cylinder barrel groove, the side wall of the accommodating groove is communicated with an oil supply channel, the bottom of the cylinder barrel groove is communicated with an air supply channel, and an opening of the accommodating groove is provided with a top cover piece; the outer peripheral surface of the piston is in sealing fit with the inner side wall of the cylinder barrel groove and can slide relative to the cylinder barrel groove along the axial direction, a reset unit is mounted on the piston and drives the piston to abut against the bottom of the cylinder barrel groove; the brake assembly is arranged in the accommodating groove and comprises N friction plates and N +1 steel sheet pieces, the friction plates and the steel sheet pieces are annular pieces, the friction plates and the steel sheet pieces are sequentially and alternately arranged and coaxially stacked, the piston can drive the end face of the brake assembly, the brake assembly is abutted against the top cover piece, and N is a positive integer.

The reset unit comprises a spring and a top sleeve, one end of the spring is connected with an external component, the other end of the spring is connected to the top sleeve in a penetrating mode, and one end, far away from the top sleeve, of the top sleeve abuts against the piston.

Further, the piston is provided with a top pin, and one end of the top sleeve, which is far away from the spring, abuts against the top pin.

Effectively, the intermediate shaft brake assembly further comprises at least two positioning pins, steel sheet bayonets are arranged on the excircle of the steel sheet piece, the number of the steel sheet bayonets is the same as that of the positioning pins, and the steel sheet bayonets are uniformly distributed along the circumferential direction of the steel sheet piece; the positioning pins are matched with the steel sheet bayonets in a one-to-one correspondence mode, and the positioning pins are connected to the integrated base in a penetrating mode.

Further, be equipped with the top cap bayonet socket on the top cap spare, the top cap bayonet socket with the quantity of locating pin is the same, just the top cap bayonet socket with the locating pin one-to-one cooperation, work as the locating pin cross-under during the integrated seat, the locating pin still joint in the top cap bayonet socket.

Still further, the locating pin is provided with three.

Preferably, the top cover member is bolted to the integration seat by bolts.

Preferably, the gas supply channel includes a channel main body, both ends of the channel main body are in a first gas port and a second gas port formed on the integration seat and communicated with the external environment, and the channel main body is communicated with the groove bottom of the cylinder groove through a communication hole.

Preferably, the piston is sleeved with at least one sealing ring, and the outer ring of the sealing ring is in sealing fit with the inner side wall of the cylinder barrel groove.

Preferably, N is 3.

The utility model has the beneficial effects that:

the intermediate shaft brake assembly simplifies the steps of arranging the oil supply channel and the gas supply channel on the integrated seat in the production process, improves the manufacturing efficiency, reduces the production cost, avoids the risk of position deviation of the oil channel and the gas channel, reduces the fault probability and improves the working reliability. And because the piston is arranged to separate the accommodating groove and the cylinder groove, the condition that lubricating oil enters the air passage is avoided, and the middle shaft brake assembly can run smoothly for a long time. Meanwhile, the integrated base can be limited to the positions of the brake assembly and the piston through the matching of the integrated base and the top cover piece, the arrangement is combined with the multi-piece layout of the brake assembly, the requirement of heavy AMT (automated mechanical transmission) on large brake torque is met, the space occupied by the intermediate shaft brake assembly is effectively reduced, the brake assembly can provide smaller radial diameter, larger brake torque and smaller drag torque, and the brake efficiency of the intermediate shaft brake assembly is improved.

Drawings

FIG. 1 is an exploded view of an intermediate shaft brake assembly provided by an embodiment of the present invention;

FIG. 2 is a top plan view of an intermediate shaft brake assembly provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an intermediate shaft brake assembly provided by an embodiment of the present invention.

In the figure:

100. an integrated base; 110. accommodating grooves; 120. a cylinder barrel groove; 130. a gas supply channel; 131. a first gas port; 132. a second gas port; 133. a communicating hole;

210. a roof member; 211. a top cover bayonet; 220. positioning pins; 230. a steel sheet piece; 231. a steel sheet bayonet; 240. a friction plate; 241. an internal spline; 250. a spring; 260. jacking and sleeving; 270. a piston; 271. a knock pin; 280. a seal ring; 290. and (4) bolts.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the 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 protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-3, the present embodiment provides an intermediate shaft brake assembly, which includes a integration seat 100, a piston 270 and a brake component; the integrated seat 100 is provided with an accommodating groove 110, the bottom of the accommodating groove 110 is provided with a cylinder groove 120, the side wall of the accommodating groove 110 is communicated with an oil supply channel, the bottom of the cylinder groove 120 is communicated with an air supply channel 130, and an opening of the accommodating groove 110 is provided with a top cover component 210; the outer circumferential surface of the piston 270 is in sealing fit with the inner side wall of the cylinder groove 120 and can slide relative to the cylinder groove 120 along the axial direction, a reset unit is mounted on the piston 270, and drives the piston 270 to abut against the groove bottom of the cylinder groove 120; the braking assembly is arranged in the accommodating groove 110 and comprises N friction plates 240 and N +1 steel sheet pieces 230, the friction plates 240 and the steel sheet pieces 230 are annular pieces, the friction plates 240 and the steel sheet pieces 230 are sequentially arranged in an alternating mode and coaxially stacked, the piston 270 can drive the end face of the braking assembly, and the braking assembly is enabled to abut against the jacking piece 210, wherein N is a positive integer.

According to the intermediate shaft brake assembly, the oil supply channel and the gas supply channel 130 are arranged on the integrated base 100, so that the steps of arranging the oil channel and the gas channel in the production process are simplified, the manufacturing efficiency is improved, the production cost is reduced, the risk of position deviation of the oil channel and the gas channel is avoided, the fault probability is reduced, and the working reliability is improved. And because the piston 270 separates the accommodating groove 110 and the cylinder groove 120, the condition that lubricating oil enters the air passage is avoided, and the long-time smooth operation of the intermediate shaft brake assembly is ensured. Meanwhile, the structure of the integration seat 100 is improved to enable the integration seat 100 to complete the position limitation of the brake assembly and the piston 270 through the cooperation with the top cover member 210. The multi-piece layout of the braking assembly is combined, the requirement of heavy AMT large braking torque is met, the space occupied by the intermediate shaft brake assembly is effectively reduced, the braking assembly can provide smaller radial diameter, larger braking torque and smaller dragging torque, and the braking efficiency of the intermediate shaft brake assembly is improved.

In this embodiment, the side wall of the accommodating groove 110 is provided with an oil supply port and an oil discharge port, the oil supply port is used for spraying lubricating oil to the brake assembly, and the oil discharge port is used for recovering the lubricating oil falling from the brake assembly.

Specifically, N is 3. The arrangement of the three friction plates 240 and the four steel plate pieces 230 can meet the requirement for the torque distance of the intermediate shaft brake assembly in an application environment, and can avoid the problems of poor braking effect, overlarge occupied space and the like caused by the arrangement of too many friction plates 240.

In this embodiment, the reset unit includes a spring 250 and a top sleeve 260, one end of the spring 250 is connected to the external member, the other end is connected to the top sleeve 260, and one end of the top sleeve 260 away from the top sleeve 260 abuts against the piston 270. The spring 250 and the top sleeve 260 are arranged so that after the gas in the cylinder barrel groove 120 is pumped out, the spring 250 can drive the piston 270 to move towards the groove bottom of the cylinder barrel groove 120, and therefore, the automatic resetting of the piston 270 is completed. The arrangement ensures that the piston 270 can reciprocate in the cylinder groove 120, improves the working efficiency, and ensures that the work of the intermediate shaft brake assembly can be efficiently completed.

Specifically, an inner circle of the friction plate 240 is convexly provided with an inner spline 241, and the inner spline 241 is used for braking the main box intermediate shaft.

When the gearbox is shifted up, a TCU (Transmission Control Unit) sends an instruction to Control the opening of the electromagnetic valve, gas is input into the cylinder groove 120 through the gas supply channel 130 by internal high-pressure gas to drive the piston 270 to move towards the accommodating groove 110, and pressure is transferred in a manner of extruding the braking assembly, so that the friction plate 240 is in contact with the end face of the steel sheet piece 230 and the position of the friction plate is fixed relative to the integration seat 100, the effect of braking the main gearbox intermediate shaft can be realized by the internal spline 241, and the purpose of reducing the speed is achieved. When the gas supply passage 130 draws out the gas in the cylinder groove 120, the reset unit pushes the piston 270 to reset, so that the piston 270 abuts against the bottom of the cylinder groove 120. The above-mentioned flow is the working principle of the intermediate shaft brake, and the specific content thereof is well known to those skilled in the art, and will not be described herein.

Further, the piston 270 is provided with a top pin 271, and one end of the top sleeve 260 away from the spring 250 abuts against the top pin 271. By means of the contact between the jacking sleeve 260 and the jacking pin 271, abrasion generated in the process that the resetting unit pushes the piston 270 to reset is reduced, and the maintenance frequency of the resetting unit and the piston 270 is reduced.

Preferably, the intermediate shaft brake assembly further comprises at least two positioning pins 220, steel sheet bayonets 231 are arranged on the outer circle of the steel sheet piece 230, the number of the steel sheet bayonets 231 is the same as that of the positioning pins 220, and the steel sheet bayonets 231 are uniformly distributed along the circumferential direction of the steel sheet piece 230; the positioning pins 220 are correspondingly matched with the steel sheet bayonets 231 one by one, and the positioning pins 220 are connected to the integrated base 100 in a penetrating manner. The above arrangement limits the range of movement of the steel plate 230 and friction plate 240 so that the brake assembly can only perform a predetermined action. The arrangement avoids the risk of position deviation of the steel sheet piece 230 and the friction plate 240, and guarantees the working reliability of the intermediate shaft brake assembly. Specifically, the extending direction of the positioning pin 220 is the same as the extending direction of the accommodating groove 110, a mounting hole corresponding to the positioning pin 220 is formed at the bottom of the accommodating groove 110, and the positioning pin 220 is inserted into the mounting hole.

Further, be equipped with top cap bayonet 211 on top cap piece 210, top cap bayonet 211 is the same with locating pin 220's quantity, and top cap bayonet 211 and locating pin 220 one-to-one cooperation, and when locating pin 220 cross-under in integrated seat 100, locating pin 220 still joint in top cap bayonet 211. The positioning pin 220 is clamped with the top cover bayonet 211, so that the installation effect of the positioning pin 220 on the integrated base 100 is further ensured, the risk that the positioning pin 220 is separated from a preset position is reduced, and the stable operation of the intermediate shaft brake assembly is ensured.

Specifically, the positioning pins 220 are provided in three. The selection of the three positioning pins 220 not only ensures the limiting effect on the steel sheet bayonet 231, but also avoids the situation that the strength of the top cover component 210 and the steel sheet component 230 is reduced due to the arrangement of too many bayonets.

Preferably, the top cover member 210 is screwed to the integration seat 100 by means of bolts 290. The screw connection of the top cover element 210 to the integration seat 100 ensures a compact structure and reliable connection of the intermediate shaft brake assembly, so that the operation of the intermediate shaft brake assembly can be smoothly performed.

In the present embodiment, the gas supply passage 130 includes a passage body, both ends of which form a first gas port 131 and a second gas port 132 communicating with the external environment on the integration seat 100, and which communicates with the groove bottom of the cylinder groove 120 through a communication hole 133. The above arrangement only needs to complete the machining operation of the air supply channel 130 by drilling holes at the positions where the first air port 131, the second air port 132 and the communication hole 133 are arranged on the accommodating groove 110, and the operation process is simple, low in cost and easy to apply to large-scale production, and is helpful to improve the manufacturing efficiency of the intermediate shaft brake assembly.

Preferably, the piston 270 is sleeved with at least one sealing ring 280, and an outer ring of the sealing ring 280 is in sealing fit with an inner side wall of the cylinder groove 120. Specifically, a sealing ring 280 is sleeved on the piston 270. The provision of a seal 280 reduces drag on the piston 270 and increases the speed of response of the brake assembly.

The intermediate shaft brake assembly provided by the embodiment is suitable for the arrangement form of the intermediate shaft of the integrated AMT gearbox assembly.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An intermediate shaft brake assembly, comprising:

the integrated base (100) is provided with an accommodating groove (110), a cylinder barrel groove (120) is formed in the groove bottom of the accommodating groove (110), the side wall of the accommodating groove (110) is communicated with an oil supply channel, the groove bottom of the cylinder barrel groove (120) is communicated with an air supply channel (130), and a top cover part (210) is installed at an opening of the accommodating groove (110);

the outer circumferential surface of the piston (270) is in sealing fit with the inner side wall of the cylinder barrel groove (120) and can slide relative to the cylinder barrel groove (120) along the axial direction, a resetting unit is mounted on the piston (270), and the resetting unit drives the piston (270) and enables the piston (270) to abut against the groove bottom of the cylinder barrel groove (120);

the brake assembly is arranged in the accommodating groove (110) and comprises N friction plates (240) and N +1 steel plate pieces (230), the friction plates (240) and the steel plate pieces (230) are annular pieces, the friction plates (240) and the steel plate pieces (230) are sequentially arranged in an alternating mode and are coaxially stacked, the piston (270) can drive the end face of the brake assembly, the brake assembly is enabled to abut against the top cover piece (210), and N is a positive integer.

2. The intermediate shaft brake assembly as claimed in claim 1, characterized in that the return unit comprises a spring (250) and a top sleeve (260), one end of the spring (250) being connected with an external member and the other end being threaded to the top sleeve (260), one end of the top sleeve (260) remote from the top sleeve (260) abutting against the piston (270).

3. The intermediate shaft brake assembly as claimed in claim 2, wherein an ejector pin (271) is mounted on the piston (270), and an end of the ejector sleeve (260) remote from the spring (250) abuts against the ejector pin (271).

4. The countershaft brake assembly of claim 1, further comprising at least two positioning pins (220), wherein the steel sheet member (230) has steel sheet locking openings (231) on an outer circumference thereof, the number of the steel sheet locking openings (231) is the same as that of the positioning pins (220), and the steel sheet locking openings (231) are uniformly distributed along a circumferential direction of the steel sheet member (230);

the positioning pins (220) are matched with the steel sheet bayonets (231) in a one-to-one correspondence mode, and the positioning pins (220) are connected to the integrated base (100) in a penetrating mode.

5. The countershaft brake assembly of claim 4, wherein the top cover member (210) has top cover bayonets (211), the number of the top cover bayonets (211) is the same as the number of the positioning pins (220), the top cover bayonets (211) are matched with the positioning pins (220) in a one-to-one correspondence, and the positioning pins (220) are further engaged with the top cover bayonets (211) when the positioning pins (220) are inserted into the assembly base (100).

6. The intermediate shaft brake assembly of claim 5, wherein there are three of the positioning pins (220).

7. The intermediate shaft brake assembly according to any one of claims 1 to 6, wherein the top cover member (210) is bolted to the integration seat (100) by means of bolts (290).

8. The intermediate shaft brake assembly according to any one of claims 1 to 6, wherein the gas supply passage (130) includes a passage main body, both ends of which form a first gas port (131) and a second gas port (132) on the integration seat (100) that communicate with the outside environment, the passage main body communicating with the groove bottom of the cylinder groove (120) through a communication hole (133).

9. An intermediate shaft brake assembly according to any one of claims 1 to 6, wherein the piston (270) is fitted with at least one sealing ring (280), the outer ring of the sealing ring (280) sealingly engaging the inner side wall of the cylinder groove (120).

10. An intermediate shaft brake assembly as claimed in any one of claims 1 to 6, wherein N is 3.