Brake device for vehicle

 

(57) Abstract:

The invention relates to a disc brake device for a vehicle. Brake device for a vehicle includes at least one plate having two essentially flat surfaces. The first of these surfaces are partially covered in its Central part of the friction material. The overlay contains from two sides referred to the Central part of the two side loops. Each of the lugs has a relatively large width in the first direction almost perpendicular to the second direction connecting the ears. Referred to the Central part connected to the two lugs of the connecting zones having a relatively small width in the first direction. At a distance from each of the connecting zones, each lug has a width along the perimeter greater than the width of this zone. Every ear pads has a round shape. On said second surface are flat springs, which have the shape of a star with at least three beams. The corresponding spring attached to each eye to its Central part. Each spring is hanging over the periphery of the corresponding loops in at least two points that are spatially separated of midfi the possibility of returning the pads into the resting position immediately after releasing the brake. 7 C.p. f-crystals, 12 ill.

The present invention relates to a brake device for a motor vehicle comprising at least one plate having two essentially flat outer surfaces, the first of which is partially covered in the Central area of the friction material, and the pad further comprises each of the two sides of this Central area of the two side loops, each of which has a relatively large width in the first direction almost perpendicular to the second direction, connecting these ears, the Central region is connected to two oscam corresponding connecting zones having a relatively small width in the first direction, so outside of the connecting zones, each ear has a perimeter that is greater than the width of this zone.

The device in accordance with this definition, which embody a certain amount of disc brakes are well known as shown, for example, in U.S. patent N 4044864.

Very long-standing challenge in the disk brake, in particular, those that use overlays videopreteen type is the return of the pads in position on the opposite surface of the disk relative to the surface, to which facing the piston rubs against the disk even when the brake is actuated and wears out prematurely, at the same time, unnecessarily slowing the movement of the car.

The aim of the invention is to develop a braking device, which, being of simple design solves the problem of returning the pads into its resting position immediately after releasing the brake.

To this end, we offer brake, which, moreover, corresponds to the above preamble, is essentially characterized in that each ear pads carries at its second surface, at least a flat spring which is attached to the eyelet its Central part and which overhangs the perimeter of the eye, at least in two points, which are spaced between themselves along this perimeter.

Preferably, the brake device includes first and second friction linings of the above described type and is characterized in that it further comprises two brake element, which can move relative to each other, one of which is a bracket, osedlaya the brake disc and the other of which is a holder attached to the vehicle; clamping means, the soda is UEMOA piston; and guiding means enabling the bracket to slide relative to the holder when the actuation clamping means, and first and second friction linings, converted, respectively, to the first and second surfaces of the disk, caught between the piston and bracket and is moved in the third direction by actuate the clamping means to be attached to the disk, and ears, at least one of the pads set to the appropriate section (s) of the holder, each of which extends in the third direction and has an opening facing in a second direction and having a size smaller than the width of the eye, which he accepts.

For example, you can ensure that the cylinder was installed in the ring attached to the holder, and relative to which the cylinder can slide under the action of the braking force.

Then the bracket can be attached Rethimno to the second plate to be attached to the latter in a first direction radially relative to the disk, and the ears of the second pads, preferably of circular form, mounted in said housing holder.

To attach to each other vtoa has at least one protrusion passing through the cutout, and the Central spring is attached to the ledge, resting on one edge of the cut.

Under these conditions it is possible to make the bracket freely rested on the ring.

Preferably, each flat spring, essentially has the shape of stars, including at least three branches, and that the spiral spring is connected to the center plate by means of rivets having the rim remote from the spring in the rest position of the latter and serves to limit the deformation of this spring.

Finally, preferably, each lug lining is protected by a cylindrical cap made of dust-proof material and held on the first surface of the lining.

Other characteristics and advantages of the invention will become apparent from the following description by way of non-limiting example with reference to the accompanying drawings, on which:

Fig. 1 depicts in his right side partial section along the line I-I of Fig. 11 and the brake device according to the invention, and in the left part of the appearance of this device in the direction of the arrow 1 of Fig. 11,

Fig. 2 depicts the appearance of all tormoznoy the pad, according to the invention, in the form of a cut in one of its transverse springs,

Fig. 8 depicts a perspective view of the flat spring according to the invention,

Fig. 9 depicts a perspective view of the holder brake device according to the invention,

Fig. 10 depicts a perspective view of the calipers brake device according to the invention seen from the side indicated by the arrow II of Fig. 11,

Fig. 11 depicts a view in section of a brake device according to the invention, and

Fig. 12 depicts a perspective view of the bracket of the brake device according to the invention seen from its end.

As shown in the figures, the invention, in General, relates to a disk brake, which typically contains two brake element, which can move relative to each other, one of which is a bracket 1, osedlaya brake disc D (Fig. 11), and the other of which is a holder 2 attached to the vehicle; clamping means containing the cylinder 3, rushing to the bracket 1 and having opposite first surface D1 of the disk D, the hole 30 is closed by a piston 31; a guiding tool that should be defined below and which enables the bracket 1, slide the gasket 41 and 42.

These first and second friction pads 41 and 42, converted, respectively, to the first and second surfaces D1 and D2 of the disc D (Fig. 11), are trapped between the piston 31 and the end 10 of the bracket 1 and can be displaced in A direction axially relative to the disk by increasing the pressure in the cylinder 3, so the piston 31 on the one hand, and the end 10 of the bracket 1 on the other hand applied to the disc D.

Each plate, for example, 41 or 42 has two almost flat surface, such as 411, 412 and 421, 422, the first of which 411, 421 is partially covered in the Central region P (Fig. 1) friction material F.

In addition, each plate includes two sides from the Central region P two side loops round shape, such as 41a, 41b and 42a, 42b, each of which (Fig. 1) in the direction R almost radially in relation to the disk, so almost perpendicular to the direction S, the secant to the drive, which connects the ears, has a relatively large width L1, while the Central region P is connected to the two lugs of the connecting zones Z, which in the radial direction R are relatively small width Lo.

Under such circumstances, every ear is at some distance from the on to the appropriate body in the holder, such as 21a, 21b, 22a or 22b (Fig. 9) which extends in the axial direction A and which has an opening facing in secodam direction S and having a size less than the width L2 L1 of the ear in which it is inserted.

According to the invention, each eye, at least on the second surface of the lining, such as 412 or 422 has a transverse spring, for example, 51a, 51b, 52a and 52b, which are connected with this eyelet its Central part (Fig. 8) and which overhangs the perimeter of the eye, at least at two points, for example, 521, 522, which are spatially separated between themselves along this perimeter.

As shown in Fig. 8, each flat spring preferably has the shape of stars, including at least three branches, and in this case, seven.

Preferably, each flat spring (Fig. 3-7) is fixed at its center to the plate by rivets, for example, 520, which passes through the ear pads in the center.

As shown in Fig. 3-7, rivet 520, at least on the same side where the spring 52b has a rim 521, remote from the spring in the rest position of the latter and serves to limit the deformation of this spring.

More precisely, Fig. 3 illustria in the direction of the arrow and flat spring 52b, which is located inside the housing 22b, followed by the eye as it moves only with a delay, due to the elastic deformation of this spring, which forces them to rely on the rim 521. When the stop plate to exert pressure (Fig. 5), the flat spring 52b again occupies its rest position, causing the rebound "r" pads against the disc. In proportion to the wear of the "U" friction material F plate moves to the disk, as shown in Fig. 6, which is similar to Fig. 4. Remove the worn pads with a view to its replacement leads to deformation of the spring 52b in the opposite direction relative to the deformation, which latter is subjected during braking.

As shown in Fig. 3-7, each ear pads can be protected by a cylindrical cap, such as 6b, made of dust-proof material and held on the first surface of the lining, such as 421 rivet 520.

In the preferred embodiment of the invention, the cylinder 3 is in the ring 23 attached to the holder (Fig. 9 and 11) and on which the cylinder can slide under the action of the braking force.

For example, the axial position of the cylinder relative to the ring 23 is fixed krugosvet last slide during braking.

As shown in Fig. 11, the bottom 3a rests on the bottom 11 of the calipers, located on the opposite side from the end of last 10, through the hole 11a in the bottom 11 is held and fixed on the bottom of the blocking element 8 discharge pipe 32 of the cylinder 3.

Due to this arrangement, the cylinder is always relative to the ring 23, the position which gives the opportunity to eliminate dead stroke as a result of wear of the "U" of the friction lining material F.

In addition, since the ears 42a, 42b of the second pads 42 are installed in the housings 22a, 22b of the holder, to hold the calipers enough to attach it to the second plate in the radial direction R.

For this purpose, as shown in Fig. 1, 2 and 11, calipers 1 is attached Rethimno to the second plate 42 via a Central spring 9.

More precisely, in the Central part of the bracket has an aperture 12 ( Fig. 1 and 10) through which pass two tabs, for example, 423 of the second pads 42 or 413 and 414 of the first pads 41 and the Central spring 9 is fixed on these ledges and rests on the edges 12a, 12b of the recess 12.

Under these circumstances the Central part of the bracket 1 freely rests on the ring 23, the direction of the bracket in relation to the der the second plate 42, which itself goes in the holder.

1. Braking device for a motor vehicle comprising at least one cover plate (41, 42) having two essentially flat surfaces(411, 412, 421, 422), the first (411, 421) of which are partially covered in its Central part (P) of the friction material (F), and the overlay contains from two sides referred to the Central part (P) two side eyelet (41a, 41b, 42a, 42b), each of which has a relatively large width (L1) in the first direction (R), almost perpendicular to the second direction (S) connecting the ears, referred to the Central part (P) is connected to the two lugs of the connecting zones (Z) having a relatively small width (L0) in the first direction (R), so that at some distance from each connecting zone every ear (41a, 41b, 42a, 42b) has a width along the perimeter greater than the width (L0this area, characterized in that each lug (41a, 41b, 42a, 42b) of the pads has a round shape, while at the said second surface (412, 422) are flat springs (51a, 51b, 52a, 52b), which have the shape of a star with at least three beams, with the corresponding spring attached to each ear its Central part (C), each spring davisae the s between them along the perimeter of the ear.

2. The device under item 1, characterized in that it comprises first and second friction lining, two elements (1, 2) brakes, which can move relative to each other, and one of the elements is a bracket (1) covering the brake disc (D), and the other element is a holder (2) for attaching to the vehicle, the clamping means containing the cylinder (3), located on the bracket (1) and having turned to the first (D1) of the two surfaces of the brake disc hole (30), closed by a piston (31), guide means (21a, 21b, 22a, 22b) that enables the sliding bracket relative to the holder when the actuation clamping means, and the aforementioned first and second friction plates (41, 42), addressed respectively to the first and second surfaces (D1, D2) disk made with the possibility of clamping between the piston and bracket and move in a third direction (A) due to actuate the clamping means for pressing the disk, and both plates provided with lugs and ears (41a, 41b, 42a, 42b) at least one of the plates mounted in the respective housing (21a, 21b, 22a, 22b) of the holder, each of which extends in the third direction (A) and has a hole, ori is installed.

3. The device according to p. 2, characterized in that the cylinder is installed in the ring (23) constituting one piece with the holder (2), while the cylinder is made slidable relative to the ring under the action of the braking force.

4. The device according to p. 3, characterized in that the bracket (1) attached Rethimno to the second plate (42) in the first direction (R) radially relative to the disk, and ears (42a, 42b) of the second pads installed in these buildings (22a, 22b) of the holder.

5. The device according to p. 4, characterized in that the bracket (1) has a cutout (12) extending in a third direction (A), and the second cover plate (42) has at least one projection (423) passing through the cutout, and the Central spring (9), attached to the ledge, leaning on the edge (12a, 12b) of the cut.

6. The device according to any one of paragraphs.3 to 5, characterized in that the bracket is freely mounted on the ring (23).

7. The device according to p. 6, characterized in that the spiral spring is attached to its Central part (C) to the plate by rivets (520), which by the spring has at least the rim (521), which is remote from the spring to the position of rest of the latter and serves to limit the deformation of the spring.


 

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