Dual-motor fixed brake caliper assembly

Abstract

The utility model relates to the field of brake calipers, and discloses a bilateral driving fixed brake caliper device which comprises a caliper body, a service brake assembly and a parking brake assembly, the service brake assembly and the parking brake assembly are arranged on the caliper body, brake cavities on the inner side and the outer side are arranged in the caliper body, and caliper pistons capable of axially moving in the brake cavities are arranged in the brake cavities on the two sides respectively. A space used for containing part of the brake disc is formed between the brake cavities on the two sides, and friction plates are arranged on the inner side and the outer side in the space respectively. The parking braking assemblies are in transmission connection with the caliper piston, the inner side and the outer side of the caliper body are each provided with at least one parking braking assembly, and each parking braking assembly comprises a driving motor installed on the caliper body. The service braking assembly is communicated with the braking cavity through braking fluid. According to the structure, the service braking capacity of an original fixed braking caliper assembly is not affected, meanwhile, the parking braking capacity is achieved, and the problems that an existing parking brake is slow in braking response, eccentric wear is caused by out-of-tolerance of the gravity center, dragging is large, and even stuck braking fails are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of brake caliper, especially to a double-side driving fixed brake caliper device. BACKGROUND

[0002] With the rapid development of automobile industry, especially the rapid rise of new energy vehicles, the requirement for vehicle braking performance is increasing. To meet this demand, more and more vehicles begin to be equipped with fixed caliper calipers on four wheels to replace the previous scheme of using fixed caliper calipers on front wheels and floating electronic parking calipers on rear wheels. Compared with floating electronic parking calipers, fixed brake calipers have the advantage of distributing multiple pistons evenly on the brake disc, which can install larger area brake pads, thereby significantly improving the braking performance. However, the existing fixed caliper brake device system does not have parking function, and needs to additionally increase a floating brake caliper or drum-in-disc to realize the parking of the equipment. Although this configuration solves the parking problem, the brake system structure is complex, which brings many problems, such as complex machining and assembly process, high difficulty of after-sales maintenance, high energy consumption of dragging and lagging, high after-sales cost, etc. SUMMARY

[0003] The utility model in related to the shortcoming in the prior art provides a double-side driving fixed brake caliper device.

[0004] To solve the above technical problems, the utility model solves them through the following technical schemes:

[0005] Based on the above background, it is urgent to develop a new structure brake device to improve the integration degree of the brake device, optimize the braking performance, reduce the manufacturing difficulty and reduce the use cost.

[0006] The application discloses a kind of bilateral drive fixed type brake caliper device, including caliper body and the travel brake assembly and parking brake assembly arranged on caliper body, inside caliper body is provided with inside and outside brake cavity, two sides brake cavity is equipped with the caliper piston that can move axially in brake cavity respectively, space for accommodating part brake disc is formed between two sides brake cavity, and the inside and outside of this space are provided with friction plate respectively;Parking brake assembly is connected with caliper piston transmission, and the inside and outside of caliper body are provided with at least one set of parking brake assembly, and parking brake assembly includes the drive motor installed on caliper body, further include nut, drive motor is connected with nut transmission and drives nut axial movement, and caliper piston is arranged at the output end of nut;Travel brake assembly is communicated with brake cavity by brake fluid, and travel brake assembly includes the oil inlet hole arranged on caliper body and the inside oil passage for communicating the inside and outside brake cavity in caliper body.The caliper has the mounting surface for the drive motor of parking brake, and the drive motor is arranged on the two sides of caliper.The space for accommodating part brake disc between two sides brake cavity can be conveniently installed, and the two parts of caliper body on the two sides of space accommodate transmission mechanism respectively;Two sides are provided with motor, and the structure of floating caliper that must be removed in general parking brake is removed, under the structure of fixed caliper, the same piston is driven friction plate, and the brake effect of travel brake and parking brake is improved, and the space for installing parking brake caliper is saved, and one brake caliper can be installed on each brake disc of wheel, and travel brake and parking brake are considered, brake efficiency is improved, and the cost of installing multiple brake calipers is reduced.Parking brake can be realized by bilateral drive, so that the caliper assembly does not have axial displacement when parking brake, the parking response time is reduced, the piston is returned faster when brake is released, and drag is reduced.

[0007] As preferred, one brake cavity is arranged on each side, and the threaded guide rod and nut of each set of parking brake assembly extend into brake cavity respectively.

[0008] As preferred, it further includes a gear ring and a threaded guide rod, the output shaft of the drive motor on each side is threadedly engaged with the gear ring and drives the gear ring to rotate forward or reverse, the inner ring of the gear ring is connected with one end of the threaded guide rod and drives the threaded guide rod to rotate, and the other end of the threaded guide rod is threadedly engaged with the nut and drives the nut to move axially through the rotation of the threaded guide rod. The drive motor drives the gear ring to rotate through the drive motor output screw rod to output the clamping force of parking brake.

[0009] As preferred, the threaded guide rod is provided with a protruding part protruding radially, the caliper body is provided with an extension part protruding towards the threaded guide rod, the protruding part is located on the side of the caliper piston relative to the extension part, and a plain bearing is arranged between the protruding part and the extension part. The cooperation of the protruding part and the extension part can assist the radial limiting of the threaded guide rod and the caliper body, and the plain bearing can make the two have no relative displacement in axial direction but enable the threaded guide rod to rotate smoothly.

[0010] As preferred, the protrusion forms radial limit for the threaded guide rod, the threaded guide rod is sleeved with a clamping pad, and the clamping pad is clamped on the protrusion on the side end face of the gear ring. The clamping pad can help the threaded guide rod and the structure of the clamp body to realize the radial limit of the threaded guide rod.

[0011] As preferred, the side surface of the output shaft of the driving motor and the gear ring are helical teeth, and the axis of the output shaft is parallel to the rotation plane of the gear ring.

[0012] As preferred, the driving motor is installed at the position corresponding to the brake cavity outside the clamp body, and the shell of the driving motor does not exceed the end face of the clamp body inside and outside. This structure enables the motor to be installed on the side of the clamp body instead of the inside and outside end face, thereby reducing the length of the clamp assembly and saving the installation volume.

[0013] The utility model discloses a fixing type brake clamp assembly, which has the advantages of the following technical schemes:

[0014] The structure of the utility model does not affect the original fixed type brake clamp assembly's service brake ability, and has parking brake ability, and eliminates a series of problems caused by the existing parking brake, such as slow brake response, eccentric wear caused by gravity deviation, large drag, and even brake failure caused by locking.

[0015] The fixed type clamp brake system integrates electronic parking function, does not need to additionally arrange a separate parking clamp brake system, reduces the structure weight and the type of parts of the brake system, and effectively reduces the risk of brake failure.

[0016] The fixed type clamp body has no axial displacement during service brake and parking brake, the parking response time is short, the equipment safety is effectively improved, and the two pistons can quickly return after the parking is released, so that the drag after parking is reduced. DETAILED DESCRIPTION

[0017] Figure 1 is a structural schematic view of the utility model;

[0018] Figure 2 is a front view of the utility model;

[0019] Figure 3 is a C-C sectional view of the utility model; Figure 2

[0020] Figure 4 is an A-A sectional view of the utility model; Figure 2

[0021] Figure 5 is a B local enlarged view of the utility model; Figure 4

[0022] ​​​The parts referred to by the numbers in the above attached figures are as follows: 1. Clamp body; 11. Brake chamber; 12. Extension; 2. Drive motor; 21. Output shaft; 3. Gear ring; 4. Threaded guide rod; 41. Protrusion; 5. Nut; 6. Clamp piston; 7. Friction plate; 8. Surface bearing; 9. Surface bearing. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] A dual-drive fixed brake caliper device, such as Figures 1-2 As shown, the device includes a caliper body 1 and a service brake assembly and a parking brake assembly mounted on the caliper body 1. The caliper body 1 has inner and outer brake chambers 11. Each of the two brake chambers 11 has a caliper piston 6 that can move axially within the brake chamber 11. A space for accommodating part of the brake disc is formed between the two brake chambers 11. Friction pads 7 are provided on the inner and outer sides of this space.

[0026] The parking brake assembly is connected to the caliper piston 6. At least one parking brake assembly is provided on both the inner and outer sides of the caliper body 1. The parking brake assembly includes a drive motor 2 installed on the caliper body 1 and a nut 5. The drive motor 2 is connected to the nut 5 and drives the nut 5 to move axially in and out. The caliper piston 6 is located at the output end of the nut 5.

[0027] The service brake assembly is connected to the brake chamber 11 via brake fluid. The service brake assembly includes an oil inlet 13 provided on the caliper body 1 and an inner oil passage inside the caliper body 1 that connects the inner and outer brake chambers 11.

[0028] One brake chamber 11 is provided on each side, and the threaded guide rod 4 and nut 5 of each parking brake assembly extend into the brake chamber 11 respectively.

[0029] like Figures 3-4 As shown, it also includes a gear ring 3 and a threaded guide rod 4. The output shafts 21 of the drive motors 2 on both sides are threadedly engaged with the gear ring 3 and drive the gear ring 3 to rotate forward or backward. The inner ring of the gear ring 3 is connected to one end of the threaded guide rod 4 and drives the threaded guide rod 4 to rotate. The other end of the threaded guide rod 4 is threadedly engaged with the nut 5 and drives the nut 5 to move axially through the rotation of the threaded guide rod 4.

[0030] like Figure 5 As shown, the threaded guide rod 4 is provided with a radially protruding protrusion 41, and the clamp body 1 is provided with an extension 12 protruding in the direction of the threaded guide rod 4. The protrusion 41 is located on the side of the caliper piston 6 relative to the extension 12, and a flat bearing 8 is provided between the protrusion 41 and the extension 12.

[0031] The protrusion 41 forms a radial limit on the threaded guide rod 4, and the threaded guide rod 4 is fitted with a retaining pad 9, which is engaged with the end face of the protrusion 41 located on one side of the gear ring 3.

[0032] The output shaft 21 of the drive motor 2 and the side of the gear ring 3 are both helical teeth, and the axis of the output shaft 21 is parallel to the rotation plane of the gear ring 3.

[0033] The drive motor 2 is installed outside the clamp body 1 at the position corresponding to the brake cavity 11, and the housing of the drive motor 2 does not exceed the end faces of the inner and outer sides of the clamp body 1.

[0034] like Figure 2 As shown, lateral planes are provided on both sides of the clamp body 1, corresponding to the positions of the brake chamber 11. The drive motor 2 is mounted on the lateral planes on both sides of the clamp body 1 by bolts. The lateral planes on both sides of the clamp body 1 have through holes for the parking motor drive shaft. Wear-resistant copper sleeves and O-rings are placed in these through holes. Bearing mounting holes are provided at the other end along the axial direction of these through holes, and bearings are fitted into these holes. The output shaft 21 of the drive motor 2 passes through the through holes on the clamp body 1 and is assembled with the bearing in the bearing hole. Large circular holes are provided on both sides of the clamp body 1 to accommodate gear rings 3, which mate with the output shaft 21 of the parking motor. Sealing grooves are provided on the front planes on both sides of the clamp body 1, and sealing strips are placed in these grooves. Through the fit of the covers and the fixing of the bolts, a sealing structure is formed with the clamp body to prevent air and moisture from entering the clamp body and causing rust, ensuring the safe operation of the entire braking device.

[0035] The technical principle is as follows:

[0036] When not in operation, gear 3 is fitted onto threaded guide rod 4 through the center hole, threaded guide rod 4 is mounted on clamp body 1 through pad 9 and plane bearing 8, nut 5 is fitted with threaded guide rod 4 through threads, and piston 6 and friction plate 7 are in a state of no interaction force.

[0037] When the vehicle is braking: the driver presses the brake pedal, the brake fluid in the brake line enters the chambers of the caliper pistons 6 on both sides of the caliper body 1 through the oil inlet and internal oil passage, thereby generating hydraulic pressure to push the caliper pistons 6 and drive the friction pads 7 to move in opposite directions, thereby clamping the brake disc and starting the braking. When the vehicle is braking, the motor output shaft 21, gear 3, threaded guide rod 4, and nut 5 do not move.

[0038] Parking brake time: after the operator presses the parking button, the bilateral drive motor 2 starts to work, the gear 3 is driven to rotate through the motor output shaft 21, the threaded guide rod 4 is driven to rotate by the gear 3, the threaded guide rod 4 rotates to drive the adjusting nut 5 and the piston 6 to move, the bilateral caliper piston 6 drives the friction plate 7 on the respective side to move towards the opposite side, thereby clamping the brake disc, realizing the parking of the equipment, when the motor reverses, the brake is released, the threaded guide rod 4 reverses to drive the nut 5 to reset, the piston quickly resets, and the friction plate 7 also quickly resets under the action of the spring.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0040] In summary, the above only describes the preferred embodiments of the present application, and any changes and modifications made within the scope of the patent application of the present application shall be included in the scope of the patent of the present application.

Claims

1. A dual-drive fixed brake caliper device, comprising a caliper body (1) and a service brake assembly and a parking brake assembly disposed on the caliper body (1), wherein the caliper body (1) is provided with brake chambers (11) on both the inner and outer sides, and caliper pistons (6) that can move axially within the brake chambers (11) are respectively disposed in the brake chambers (11), and a space for accommodating part of the brake disc is formed between the two brake chambers (11), wherein friction pads (7) are disposed on both the inner and outer sides of the space. Its features are: The parking brake assembly is connected to the caliper piston (6) in a transmission. At least one parking brake assembly is provided on both the inner and outer sides of the caliper body (1). The parking brake assembly includes a drive motor (2) installed on the caliper body (1) and a nut (5). The drive motor (2) is connected to the nut (5) in a transmission and drives the nut (5) to move axially in and out. The caliper piston (6) is located at the output end of the nut (5). The service brake assembly is connected to the brake chamber (11) via brake fluid. The service brake assembly includes an oil inlet (13) provided on the caliper (1) and an inner oil passage in the caliper (1) that connects the inner and outer brake chambers (11).

2. A dual-sided drive design brake caliper apparatus as defined in claim 1, wherein: One brake chamber (11) is provided on each side, and the threaded guide rod (4) and nut (5) of each parking brake assembly extend into the brake chamber (11).

3. A dual-sided drive fixed caliper brake device according to claim 1, wherein: It also includes a gear ring (3) and a threaded guide rod (4). The output shaft (21) of the drive motor (2) on both sides is threadedly engaged with the gear ring (3) and drives the gear ring (3) to rotate forward or backward. The inner ring of the gear ring (3) is connected to one end of the threaded guide rod (4) and drives the threaded guide rod (4) to rotate. The other end of the threaded guide rod (4) is threadedly engaged with the nut (5) and drives the nut (5) to move axially through the rotation of the threaded guide rod (4).

4. A dual-sided drive fixed caliper brake device according to claim 1, wherein: The threaded guide rod (4) is provided with a radially protruding protrusion (41), and the clamp body (1) is provided with an extension (12) protruding in the direction of the threaded guide rod (4). The protrusion (41) is located on the side of the caliper piston (6) relative to the extension (12), and a flat bearing (8) is provided between the protrusion (41) and the extension (12).

5. A dual-sided drive fixed caliper brake device according to claim 4, wherein: The protrusion (41) forms a radial limit on the threaded guide rod (4), and the threaded guide rod (4) is fitted with a retainer (9), which is engaged with the end face of the protrusion (41) on one side of the gear ring (3).

6. A dual-sided drive fixed caliper brake device according to claim 1, wherein: The output shaft (21) of the drive motor (2) and the side of the gear ring (3) are both helical teeth, and the axis of the output shaft (21) is parallel to the rotation plane of the gear ring (3).

7. A dual-drive fixed-type brake caliper device according to claim 5, characterized in that: The drive motor (2) is installed outside the clamp body (1) at the position corresponding to the brake cavity (11), and the housing of the drive motor (2) does not exceed the end faces of the inner and outer sides of the clamp body (1).

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