CN103591186A - Integrated brake used for automatic transmission - Google Patents

Abstract

The invention relates to a brake, in particular to an integral brake for an automatic transmission. The brake is a wet multi-plate friction clutch, including a brake housing, a piston, a connecting plate, a baffle, a return spring, a friction plate, a pair of steel plates, and a sealing ring. The friction plate is connected with a certain element of the planetary row (such as the ring gear) through the internal spline, the dual steel plate is connected with the connection plate through the external spline, the connection plate is connected with the automatic transmission case through the flat key, and the bolt connects the brake case, the connection plate And the baffle etc. are connected as a whole. The integral brake has few parts, simple shape and easy processing, and each part is assembled into a whole, and then installed in the automatic transmission, which solves the shortcomings of difficult processing and difficult installation of automatic transmission brakes in the past.

Description

An integral brake for automatic transmission

technical field

The invention relates to a brake, in particular to an integral brake for an automatic transmission. the

Background technique

The planetary automatic transmission selectively engages or fixes several elements of the planetary gear mechanism through clutches or brakes to achieve the purpose of changing the transmission ratio. the

The wet multi-disc brake passes pressure oil into the piston chamber to push the piston to move, so that the oil-lubricated friction plate and the counter steel plate are joined to achieve braking. It has the characteristics of convenient operation and large torque capacity. the

The brakes used in planetary automatic transmissions are mostly separated structures. When the whole machine is assembled, the parts of the brakes need to be installed one by one. In view of the large number of parts in planetary automatic transmissions, this installation method is very inconvenient; in order not to interfere with the automatic transmission Other components interfere, and the parts of the brake need to be designed in a more complex shape, which is complicated to process and high in cost. the

In the automatic transmission described in the published patent CN200780003784.1, its first brake B-1 needs to process public splines on the inner wall of the transmission housing to fix the paired steel plates, and the hub member used to connect the friction plates is designed to be curved. The shape and the common planetary frame are connected by bolts; the piston and cylinder components are designed into complex shapes and fitted with the transmission case. These are not only difficult to process, high cost, but also difficult to assemble. the

Contents of the invention

The object of the present invention is to provide an integral brake for automatic transmission, which has few parts and simple shape, and the key point is that all parts are assembled into one body, which has the characteristics of low processing difficulty and easy assembly. the

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

The integral brake includes a brake housing 7, a piston 9, a connecting plate 2, a baffle plate 1, a return spring 4, a friction plate 11, a pair of steel plates 10, a fixing bolt 6, a sealing ring 5, a sealing ring 8, and a flat key 3. the

The integral brake has through holes for fixing bolts on the brake housing 7 and connecting plate 2, threaded holes for fixing bolts on the baffle plate 1, and the fixing bolts 6 can connect and fix the three together. The brake is thus assembled in one piece. the

The brake housing 7 is engaged with the piston 9, and an annular groove is opened on the inner surface of the brake housing 7 matched with the piston 9, and an annular groove is opened on the outer surface of the piston matched with the brake housing. The sealing ring B8 and the sealing ring A5 are respectively placed in the two ring grooves, thereby forming a sealed piston cavity between the piston 9 and the brake housing 7 . the

The inner side of the connection plate 2 is provided with a spline, which can be engaged with the dual steel sheet 10; the

The dual steel plates 10 and the friction plates 11 are alternately arranged, the dual steel plates 10 mesh with the connection plate 2 through the external splines, and the friction plates 11 mesh with a certain element of the planetary gear mechanism through the internal splines. the

When pressure oil is introduced into the piston cavity through the pressure oil hole on the brake housing 7, the piston 9 moves to engage the counter steel plate 10 and the friction plate 11 to realize braking. the

There are evenly distributed through holes on the connection plate 2, and the return spring 4 is placed in it; when no pressure oil is introduced, the return spring 4 makes the piston 9 close to the brake housing 7, and the dual steel plate 10 and the friction plate 11 are separated. the

The beneficial effects of the present invention are:

(1) The number of components of the brake is small, and the shape is simple and easy to process;

(2) All parts of the brake are assembled as a whole. When assembling with the whole automatic transmission, just push the corresponding position into the inner wall of the transmission housing, which is convenient for assembly. the

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further described, wherein:

Fig. 1 is a schematic structural diagram of an embodiment of the integral brake;

In the figure: 1. Baffle plate, 2. Connecting plate, 3. Flat key, 4. Return spring, 5. Sealing ring A, 6. Fixing bolt, 7. Brake housing, 8. Sealing ring B, 9. Piston, 10, dual steel sheet, 11, friction plate. the

Detailed ways

As shown in Figure 1, the integrated brake for automatic transmission includes baffle plate 1, connecting plate 2, flat key 3, return spring 4, sealing ring 5, fixing bolt 6, brake housing 7, sealing ring 8, piston 9, dual steel sheet 10, friction sheet 11. the

Connecting disc 2 and brake housing 7 respectively have six through holes for fixing bolts, and baffle plate 1 has six threaded holes for fixing bolts. the

The brake housing 7 and the piston 9 are snapped together, and an annular groove is opened on the inner surface of the brake housing 7 that matches the piston 9, and an annular groove is opened on the outer surface of the piston 9 that matches the brake housing 7. The sealing ring B8 and the sealing ring A5 are respectively placed in the two ring grooves, thereby forming a sealed piston cavity between the brake housing 7 and the piston 9 . the

The inner side of the connection plate 2 is provided with a spline, which engages with the dual steel sheet 10; the

The dual steel plates 10 and the friction plates 11 are alternately arranged, the dual steel plates 10 mesh with the connection plate 2 through the external splines, and the friction plates 11 mesh with a certain element of the planetary gear mechanism through the internal splines. the

When pressure oil is introduced into the piston cavity through the pressure oil hole on the brake housing 7, the piston 9 moves to make the counter steel plate 10 and the friction plate 11 and engage, so as to realize braking. the

There are 24 evenly distributed through holes on the connecting plate 2, and 24 return springs 4 are placed in them; when the pressure oil is not passed, the return spring 4 makes the piston 9 close to the brake housing 7, so as to couple the steel plate 10 and the friction Sheet 11 is separated.

Claims (4)

1. the integrated type break for automatic transmission, it is characterized in that, comprising: arrester shell (7), piston (9), land (2), baffle plate (1), return spring (4), friction plate (11), pairing steel sheet (10), fixing bolt (6); Arrester shell (7) is fastened togather with piston (9), forms piston cavity; Land has uniform through hole on (2), and return spring (4) is placed in through hole; Land (2) inner side has spline, can mesh with pairing steel sheet (10); Land (2) outside has keyway, can pass through flat key (3) and be connected with automatic speed variator casing; Pairing steel sheet (10) and friction plate (11) alternative arrangement; On arrester shell (7) and land (2), have the through hole for fixing bolt, baffle plate has the tapped hole for fixing bolt on (1), and fixing bolt (6) can be fixed together three's serial connection.

2. the integrated type break for automatic transmission according to claim 1, is characterized in that: on its arrester shell (7), have a through hole that passes into pressure oil.

3. the integrated type break for automatic transmission according to claim 1, is characterized in that: the upper inner headed face place matching with piston (9) of its arrester shell (7) opens an annular groove, places seal ring B(8 in annular groove).

4. the integrated type break for automatic transmission according to claim 1, is characterized in that: the upper periphery place matching with arrester shell (7) of its piston (9) opens an annular groove, places seal ring A(5 in annular groove).

Images