CN215567546U

CN215567546U - Cylinder diameter variable brake caliper and vehicle with same

Info

Publication number: CN215567546U
Application number: CN202120968685.4U
Authority: CN
Inventors: 卿翔; 贾倩; 许世堂; 陈泳棋; 陈国辉; 邓伏栋
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2022-01-18
Anticipated expiration: 2031-05-07

Abstract

The utility model discloses a cylinder diameter variable brake caliper, which comprises a caliper body, a friction plate positioned on one side of the caliper body, an oil inlet positioned on the other side of the caliper body, an oil cylinder positioned between the friction plate and the oil inlet, a first piston and a second piston positioned in the oil cylinder, wherein a pressurizing valve and a pressure reducing valve are also arranged in the second piston. The cylinder diameter variable brake caliper provided by the utility model can realize the change of the cylinder diameter of the brake caliper, reduce the liquid demand for braking in a low-pressure area, improve the sensitivity of a pedal in the low-pressure area, further improve the feeling of the pedal, and has relatively low production cost. The utility model also provides a vehicle with the variable-cylinder-diameter brake caliper.

Description

Cylinder diameter variable brake caliper and vehicle with same

Technical Field

The utility model relates to the technical field of brake calipers, in particular to a brake caliper with a variable cylinder diameter and a vehicle with the brake caliper.

Background

The main function of the brake caliper is to provide braking force for a vehicle, the traditional brake caliper cylinder diameter is fixed, the cylinder diameters in a low-pressure area and a high-pressure area are the same, the brake caliper cylinder diameter can be designed only according to the weight of the whole vehicle, and the following cylinder diameter specifications mainly exist in the market according to the weight of the vehicle type: a floating clamp phi 57, a floating clamp phi 60, a floating clamp 2 multiplied by phi 44, a floating clamp 2 multiplied by phi 48, a fixed clamp 4 multiplied by phi 42, a fixed clamp 4 multiplied by phi 44, a fixed clamp 6 multiplied by phi 40 and the like.

In practical development and application, the liquid demand of the low-pressure area and the braking force of the high-pressure area are mutually contradictory, the larger the weight of a wheel is, the larger the required braking force is, the smaller the cylinder diameter is, the insufficient braking force of the high-pressure area is, and a brake caliper with a larger cylinder diameter is required to be selected, and the larger the cylinder diameter is, the larger the liquid demand of the low-pressure area is, and the influence of the air demand on the brake pedal feeling during braking is caused.

Disclosure of Invention

In view of the above, the present invention provides a variable cylinder diameter type brake caliper and a vehicle having the same, which can realize the conversion of the size of the cylinder diameter of the brake caliper, reduce the liquid demand in the low-pressure region by using a small cylinder diameter in the low-pressure region, ensure the brake pedal feel, improve the low-pressure brake sensitivity, and provide a sufficient braking force by using a large cylinder diameter in the high-pressure region.

The utility model provides a cylinder diameter variable brake caliper, which comprises a caliper body, a friction plate positioned on one side of the caliper body, an oil inlet positioned on the other side of the caliper body, an oil cylinder positioned between the friction plate and the oil inlet, and a first piston and a second piston positioned in the oil cylinder, wherein the first piston is arranged between the second piston and the friction plate, the diameter of the first piston is larger than that of the second piston, and a pressurizing valve and a reducing valve are also arranged in the second piston.

Further, the friction plates comprise a first friction plate and a second friction plate which are opposite in position, and the first piston is connected with the first friction plate.

Further, the first piston includes a first end portion and a first bottom portion, the second piston includes a second end portion and a second bottom portion, the first end portion is connected to the first friction plate, and the second end portion is in contact with the first bottom portion.

Furthermore, a compressed elastic ring is clamped between the second bottom and the bottom of the oil cylinder.

Furthermore, a first sealing ring is arranged between the first piston and the inner wall of the oil cylinder, and a second sealing ring is arranged between the second piston and the inner wall of the oil cylinder.

Furthermore, the pressurizing valve and the pressure reducing valve are parallel to the moving direction of the second piston, and third sealing rings are arranged between the pressurizing valve and the second piston.

Furthermore, a pressurizing channel is arranged inside the pressurizing valve, a pressure reducing channel is arranged inside the pressure reducing valve, the pressurizing channel and the pressure reducing channel are parallel to each other and are communicated with the inside and the outside of the second piston after being opened, the pressurizing channel is opened when the hydraulic pressure in the oil cylinder exceeds a set value, and the pressure reducing channel is opened when the hydraulic pressure in the second piston is higher than the hydraulic pressure in the oil cylinder.

Further, the second end of the second piston is provided with a plurality of small holes extending in the radial direction.

The utility model also provides a vehicle which comprises the cylinder diameter variable brake caliper.

Compared with the prior art, the utility model has the following beneficial technical effects:

the utility model provides a cylinder diameter variable brake caliper, which is characterized in that on the basis of the traditional brake caliper, a single piston in an oil cylinder is changed into a front piston and a rear piston, the diameter of a first piston close to a friction plate is large, the diameter of a second piston far away from the friction plate is small, a pressurizing valve and a pressure reducing valve are arranged in the second piston, when the brake hydraulic pressure is lower than a specific value, the hydraulic pressure acts on the bottom of the second piston, the liquid amount required by the second piston is small, good pedal feeling is ensured, when the brake hydraulic pressure is higher than the specific value, the pressurizing valve is opened, the hydraulic pressure passes through the second piston and acts on the bottom of the first piston, and as the acting area is large, enough braking force can be ensured to be provided.

Drawings

Fig. 1 is a sectional view of a variable cylinder diameter brake caliper according to the present invention.

Fig. 2 is a sectional view of a first piston and a second piston in the present invention.

Wherein: 10-a clamp body; 11-friction plate; 111-a first friction plate; 112-a second friction plate; 12-an oil inlet; 13-oil cylinder; 14-a first piston; 141-a first end portion; 142-a first bottom; 143-a first sealing ring; 15-a second piston; 151-second end portion; 152-a second bottom; 153-a second seal ring; 154-third seal ring; 155-small hole; 16-a pressure valve; 161-a pressurizing channel; 17-a pressure reducing valve; 171-a pressure relief channel; 18-elastic ring.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated in the present description are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the variable cylinder diameter brake caliper provided by the present invention includes a caliper body 10, a friction plate 11 located on one side of the caliper body 10, an oil inlet 12 located on the other side of the caliper body 10, and an oil cylinder 13 located between the friction plate 11 and the oil inlet 12, where the friction plate 11 includes a first friction plate 111 and a second friction plate 112, the first friction plate 111 and the second friction plate 112 are disposed opposite to each other and are used for clamping a brake disc to generate a braking force, and the oil inlet 12 can guide hydraulic oil into the caliper body 10.

Further, the caliper body 10 further includes a first piston 14 and a second piston 15 located inside the oil cylinder 13, and a diameter of the first piston 14 is larger than a diameter of the second piston 15.

Specifically, referring to fig. 1 and 2, the first piston 14 includes a first end portion 141 and a first bottom portion 142, the second piston 15 includes a second end portion 151 and a second bottom portion 152, the first end portion 141 is connected to the first friction plate 111, the second end portion 151 is connected to the first bottom portion 142, a compressed elastic ring 18 is disposed between the second bottom portion 152 and the bottom portion of the oil cylinder 13, and the elastic ring 18 recovers an elastic force when the second piston 15 or the first piston 14 moves toward the first friction plate 111, and acts on the second bottom portion 152 to push the second piston 15 to move.

Further, a first sealing ring 143 and a second sealing ring 153 are respectively disposed between the outer peripheries of the first piston 14 and the second piston 15 and the inner wall of the oil cylinder 13, so as to ensure the sealing between the pistons and the oil cylinder 13 and prevent the outflow of oil.

Further, a pressurizing valve 16 and a pressure reducing valve 17 are arranged inside the second piston 15, a pressurizing passage 161 is arranged inside the pressurizing valve 16, a pressure reducing passage 171 is arranged inside the pressure reducing valve 17, the pressurizing passage 161, the pressure reducing passage 171 and the second piston 15 are parallel in moving direction and can be closed or opened, and when the pressurizing passage 161 and/or the pressure reducing passage 171 are opened, the inside and the outside of the second piston 15 are communicated. When the pressure of the hydraulic oil in the pressurizing passage 161 is higher than a predetermined value, in this embodiment, the predetermined value is 10bar, after the pressure of the hydraulic oil in the cylinder 13 is increased, the hydraulic oil in the cylinder 13 can enter the second piston 15 from the pressurizing passage 161, and after the pressure of the hydraulic oil in the second piston 15 is increased, the pressure reducing passage 171 is opened, the hydraulic oil in the second piston 15 flows out from the pressure reducing passage 171 into the cylinder 13.

Further, third sealing rings 154 are provided between the outside of the pressurizing valve 16, the outside of the pressure reducing valve 17, and the second piston 15 to ensure sealing, so that the oil does not flow from the outside of the pressurizing valve 16 and the pressure reducing valve 17 to the inside of the second piston 15 when the pressurizing passage 161 and the pressure reducing passage 171 are both closed.

Further, the second end 151 of the second piston 15 is provided with a plurality of small holes 155 extending in the radial direction, and the small holes 155 can allow hydraulic oil to flow from the inside of the second piston 15 to the first bottom 142 of the first piston 14, and act on the first bottom 142 to push the first piston 14 to move.

The working principle of the variable-cylinder-diameter brake caliper provided by the utility model is as follows: when the vehicle needs to brake, a driver starts to step on a pedal, oil starts to enter the oil cylinder 13 from the oil inlet 12, and if the hydraulic pressure in the oil cylinder 13 does not reach a specific value, in this embodiment, the specific value is 10bar, that is, the oil pressure is in a low-pressure region of 0 to 10bar, because no oil enters the second piston 15 at this time, the pressurizing channel 161 and the depressurizing channel 171 are both in a closed state, oil can only act on the second bottom portion 152, so as to push the second piston 15 to move against the resistance of the second sealing ring 153, the first piston 14 starts to move against the resistance of the first sealing ring 143 under the pushing of the second piston 15, so as to push the first friction plate 111 to move, and the first friction plate 111 and the second friction plate 112 clamp a brake disc to generate a braking force, because the diameter of the second piston 15 is small, the acting area of the second bottom part 152 is relatively small, so that the oil quantity required by braking is small, the braking is sensitive, and the pedal feeling is good.

When the brake pedal is deeply stepped to enable the hydraulic pressure to exceed 10bar, the pressurizing valve 16 is opened, the reducing valve 17 is still in a closed state, oil enters the interior of the second piston 15 through the pressurizing valve passage 161, then rapidly flows out through the small hole in the second end portion 151 to fill the first bottom portion 142, acts on the first bottom portion 142, pushes the first piston 14 to move against the resistance of the first sealing ring 143, in the process, the elastic ring 18 pushes the second piston 15 to move against the resistance of the second sealing ring 153 and follow the first piston 14 to further push the first friction plate 111 to clamp the brake disc to generate braking force, and due to the fact that the diameter of the first piston 14 is large, the acting area of the first bottom portion 142 is also large, the required oil amount is large, and sufficient braking force can be provided.

When the brake pedal is slightly released, the hydraulic pressure of the oil in the oil cylinder 13 begins to drop, slowly drops to 0bar below 10bar, the pressurizing valve 16 begins to close after the pressure drops to 0bar below 10bar, at the moment, the hydraulic pressure in the second piston 15 is slowly greater than the hydraulic pressure in the oil cylinder 13, when the pressure begins to be greater than the hydraulic pressure, the reducing valve 17 begins to open, and the hydraulic pressure in the second piston 15 is slowly released to 0bar along with the return of the brake pedal until the next braking cycle operation.

It can be known from the above description that the cylinder diameter variable brake caliper provided by the utility model changes a single piston in an oil cylinder into a front piston and a rear piston on the basis of the traditional brake caliper, wherein the first piston close to a friction plate has a large diameter, the second piston far away from the friction plate has a small diameter, a pressurizing valve and a pressure reducing valve are arranged in the second piston, when the brake hydraulic pressure is lower than a specific value, the hydraulic pressure acts on the bottom of the second piston, the required liquid amount is small, good pedal feeling is ensured, when the brake hydraulic pressure is higher than the specific value, the pressurizing valve is opened, the hydraulic pressure passes through the second piston and acts on the bottom of the first piston, and because the acting area is large, enough braking force can be ensured to be provided, the size of the cylinder diameter of the brake caliper can be changed, and compared with the prior art, the cost and development cost can be reduced.

The utility model also provides a vehicle which comprises the cylinder diameter variable brake caliper, and other technical characteristics of the vehicle are referred to in the prior art and are not described again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The brake caliper with the variable cylinder diameter is characterized by comprising a caliper body (10), a friction plate (11) located on one side of the caliper body (10), an oil inlet (12) located on the other side of the caliper body (10), an oil cylinder (13) located between the friction plate (11) and the oil inlet (12), a first piston (14) and a second piston (15) located inside the oil cylinder (13), wherein the first piston (14) is arranged between the second piston (15) and the friction plate (11), the diameter of the first piston (14) is larger than that of the second piston (15), and a pressurizing valve (16) and a pressure reducing valve (17) are further arranged inside the second piston (15).

2. Variable bore brake caliper according to claim 1, wherein said friction plates (11) comprise a first friction plate (111) and a second friction plate (112) which are positioned opposite each other, said first piston (14) being connected to said first friction plate (111).

3. Variable bore brake caliper according to claim 2, wherein said first piston (14) comprises a first end (141) and a first bottom (142), said second piston (15) comprises a second end (151) and a second bottom (152), said first end (141) being connected to said first friction plate (111), said second end (151) being in contact with said first bottom (142).

4. Brake caliper of variable cylinder diameter according to claim 3, characterized in that a compressed elastic ring (18) is interposed between said second bottom (152) and the bottom of said cylinder (13).

5. Variable bore brake caliper according to claim 3, wherein a first sealing ring (143) is provided between the first piston (14) and the inner wall of the cylinder (13), and a second sealing ring (153) is provided between the second piston (15) and the inner wall of the cylinder (13).

6. Brake calliper according to any of claims 1-5, wherein the pressure valve (16) and the pressure relief valve (17) are parallel to the direction of movement of the second piston (15) and a third sealing ring (154) is provided between the second piston (15).

7. The variable bore brake caliper according to claim 1, wherein a pressurizing passage (161) is provided inside the pressurizing valve (16), a pressure reducing passage (171) is provided inside the pressure reducing valve (17), the pressurizing passage (161) and the pressure reducing passage (171) are parallel to each other and communicate the inside and the outside of the second piston (15) after being opened, the pressurizing passage (161) is opened when the hydraulic pressure inside the cylinder (13) exceeds a set value, and the pressure reducing passage (171) is opened when the hydraulic pressure inside the second piston (15) is higher than the hydraulic pressure inside the cylinder (13).

8. Variable bore brake caliper according to claim 3, wherein the second end (151) of the second piston (15) is provided with a plurality of radially extending small holes (155).

9. A vehicle comprising a variable bore brake caliper according to any one of claims 1 to 8.