CN219139660U

CN219139660U - Floating type oil-electricity hybrid braking device

Info

Publication number: CN219139660U
Application number: CN202121776263.3U
Authority: CN
Inventors: 史海坤; 黄建昌; 芮正国; 张体波
Original assignee: Oechsler Plastic Products Taicang Co Ltd
Current assignee: Oechsler Plastic Products Taicang Co Ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2023-06-06
Anticipated expiration: 2031-08-02

Abstract

The utility model belongs to the technical field of brake actuators, and particularly relates to a floating type oil-electricity hybrid brake device. The braking device comprises a clamp frame and a clamp body which is in sliding connection with the clamp frame; the clamp body is provided with a jaw which can accommodate a brake disc; the two sides of the clamp body, which are positioned at the clamp mouth, are respectively provided with friction plates, which are respectively marked as a first friction plate and a second friction plate, and the two sides of the clamp body, which are positioned at the clamp frame, are also oppositely provided with a hydraulic driving device and an electric driving device; the hydraulic driving device can push the first friction plate to move towards the direction close to the second friction plate, and the electric driving device can push the second friction plate to move towards the direction close to the first friction plate. The utility model shortens the braking response time, improves the braking force, and effectively solves the defect that the traditional EPB braking response speed and the braking force cannot be taken into account. Meanwhile, the utility model has the dual functions of service braking and parking braking and has the advantages of good braking stability, small space occupation and the like.

Description

Floating type oil-electricity hybrid braking device

Technical Field

The utility model belongs to the technical field of brake actuators, and particularly relates to a floating type oil-electricity hybrid brake device.

Background

Currently, integrated calipers are mostly used in Electronic Parking Systems (EPBs) for motor vehicles. The integrated calipers are hydraulically pressed to rub the friction plate and the brake disc to provide larger braking force in the running process of the motor vehicle, so that the speed of the motor vehicle is rapidly reduced; the braking (parking braking) when the motor vehicle stops is to press the friction plate and the brake disc to rub by the electronic parking actuator, so that the vehicle is prevented from moving or sliding on a slope.

In the practical and research process, the prior EPB has a plurality of defects which are difficult to overcome due to the limitations of the structural layout and the working mode. In a non-braking state, a certain free gap is required to be reserved between the brake disc and the friction plate, and the size of the free gap is limited by factors such as expansion and contraction, driving vibration, dust in the air and the like and cannot be infinitely reduced. Therefore, during braking, the time that the friction plate moves to compress the free gap additionally increases the response time for braking, and the additional response time is inconsequential during parking braking, but during service braking, the braking performance and the safety of the vehicle are not negligibly affected, and when the vehicle runs at a high speed, the response time of 0.1s corresponds to a braking distance of about 3 m. In addition, since a very large braking force is required for the vehicle during service braking, a hydraulic braking system is employed. The hydraulic braking mode is to inject high-pressure oil into the oil cylinder by using a hydraulic power source so as to push the friction plate to squeeze the brake disc. Under certain hydraulic power source power conditions, the travelling speed and the extrusion force of the friction plate are inversely related, so that in order to ensure enough extrusion force, the travelling speed of the friction plate is greatly limited, and correspondingly, longer additional response time is generated. To shorten the additional response time, the power of the hydraulic power source may be increased, but this may greatly increase the cost and volume of the hydraulic power source.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides a floating type oil-electricity hybrid braking device.

The utility model provides a floating type oil-electricity hybrid braking device which comprises a clamp frame and a clamp body in sliding connection with the clamp frame; the clamp body is provided with a jaw which can accommodate a brake disc; friction plates are respectively arranged on the clamp body and positioned on two sides of the clamp jaw and are respectively marked as a first friction plate and a second friction plate, and at least one side of each friction plate on two sides is in sliding connection with the clamp body; a hydraulic driving device and an electric driving device are also oppositely arranged on the clamp frame and positioned on two sides of the clamp body; the hydraulic driving device can push the first friction plate to move towards the direction close to the second friction plate, and the electric driving device can push the second friction plate to move towards the direction close to the first friction plate.

The friction plates can be arranged on two sides and are respectively connected with the clamp body in a sliding way, or one side of the friction plates is connected with the clamp body in a sliding way, and the other side of the friction plates is fixedly connected with the clamp body. Wherein the pushing speed of the electric driving device is preferably greater than the pushing speed of the hydraulic driving device, and more preferably greater than 3 times the pushing speed of the hydraulic driving device. The electric drive device is preferably an electric drive device with a self-locking function. The self-locking function of the driving device can be realized by arranging a transmission structure with the self-locking function, wherein the self-locking function means that only one-way transmission can be realized, and if the reverse transmission is limited by the self-transmission structure, the locking can be realized. In reality, there are many transmission structures with self-locking function, for example, the threaded rod and the threaded sleeve are driven in a matched manner, when the lead angle of the threaded rod is smaller than the equivalent friction angle, the rotation motion of the threaded rod can drive the linear motion of the threaded sleeve, and the linear motion of the threaded sleeve can not drive the rotation motion of the threaded rod, namely, the self-locking function is achieved; similarly, the matching of the worm, the worm wheel and the bevel gear can realize a self-locking function, and the matching of the ratchet wheel and the pawl can also realize a self-locking function.

When the hydraulic braking device is used, the caliper body is fixed on a vehicle, so that the brake pad can be rotationally embedded into the jaw, and the hydraulic driving device and the electric driving device are controlled to independently brake or jointly brake so as to realize various braking effects.

The preferred braking mode is as follows:

when the parking brake is carried out, only the electric driving device works, the second friction plate is pushed to be close to the first friction plate, and the brake disc is clamped.

During service braking, the hydraulic driving device and the electric driving device work together to clamp the brake disc.

In general, the maximum pushing force of the electric driving device is far smaller than that of the hydraulic driving device, and the response speed and the pushing speed of the electric driving device are faster than those of the hydraulic driving device. Therefore, the braking mode has the following advantages:

firstly, the braking force required by the parking brake is relatively smaller but the required duration is long, and the self-locking electric driving device is adopted, so that the braking force requirement can be met, no energy consumption exists during the locking period, and the long-term high-pressure state of a hydraulic pipeline and a hydraulic pump can be avoided.

Secondly, the service braking requires large braking force and high response speed, the hydraulic driving device and the electric driving device work together, the electric driving device plays the advantages of quick response and high pushing speed in the early stage, the friction plate is pushed quickly, the free gap is reduced to zero quickly, and the electric driving device stops working and self-locks after reaching the maximum driving force. During operation of the electric drive, the hydraulic drive also responds by applying pressure to the friction plates, and as the electric drive is self-locking, the pressure between the friction plates continues to rise as the hydraulic drive applies pressure until the maximum pressure of the hydraulic drive is reached. Therefore, the utility model can quickly reduce the free clearance, realize quick braking response, and simultaneously can enable the hydraulic driving device to quickly reach the maximum pressure, thereby having large braking force and quick response speed.

And thirdly, due to the cooperation of the oppositely arranged electric driving devices, the free gap is rapidly reduced, and on the basis, the sectional area of the hydraulic oil cylinder can be further increased under the condition that the power of the hydraulic power source is not increased, for example, the sectional area of a single oil cylinder is increased or a plurality of oil cylinders are arranged, so that larger braking force is obtained. Although increasing the sectional area of the hydraulic cylinder can cause the pushing speed of the hydraulic driving device to be reduced, after the electric driving device is matched, the pushing speed of the hydraulic driving device does not obviously influence the additional response time any more, and the braking force can be increased under the condition that the response speed is hardly influenced; whereas if there is no engagement of the electrically driven device, increasing the braking effort in this way will significantly increase the extra response time, causing a braking retardation.

The utility model relates to a floating brake device, namely a sliding device between a caliper body and a caliper frame. Specifically, the clamp frame is provided with at least two guide posts, the guide posts are parallel to each other, the clamp body is provided with guide post holes matched with the guide posts, and the guide posts can be slidably arranged in the guide post holes in a penetrating manner.

Further, the first friction plate and the second friction plate are both in sliding connection with the clamp body; the two ends of the first friction plate and the second friction plate are respectively provided with a convex part, and the clamp body is provided with a concave part corresponding to the convex parts; the protruding part is slidably clamped in the recessed part.

Further, the hydraulic driving device comprises an oil cylinder shell fixed on the clamp frame, at least one piston cavity is formed in one side, close to the first friction plate, of the oil cylinder shell, a piston is slidably arranged in each piston cavity, and the end part of each piston is in close contact with the first friction plate; an oil filling hole leading to the piston cavity is arranged in the oil cylinder shell and positioned at one side far away from the first friction plate. And hydraulic oil is injected into the oil injection hole to push the piston to move, so that the first friction plate is pushed. Further, in order to improve the tightness, an annular groove can be formed in the inner wall of the piston cavity, and a rubber sealing ring is embedded in the groove.

Further, two mutually communicated piston cavities are arranged in parallel in the oil cylinder shell. The hydraulic driving device with double pistons has larger driving force and is more stable when pushing the friction plate.

Further, the electric driving device comprises a guide shell, a sliding block, a threaded rod, a motor and a transmission assembly; the guide shell is fixed on the clamp frame, a sliding block capable of sliding towards the second friction plate is arranged in the guide shell, and one end of the sliding block is connected with a threaded rod in a threaded fit manner; the rotation driving force of the motor drives the threaded rod to rotate through the transmission assembly. The threaded rod rotates to enable the sliding block to move, and the second friction plate is pushed.

Further, a pair of sliding blocks are arranged in parallel in the guide shell, and each sliding block is respectively connected with a threaded rod in a matching way; the transmission assembly is powered by a single motor and simultaneously drives the rotation of the two threaded rods.

Further, the transmission assembly comprises a first bevel gear, a second bevel gear, a transmission shaft, a worm, a pair of bevel gears and a pair of planetary gear reducers; the first bevel gear is arranged on the motor output shaft; the transmission shaft is perpendicular to the output shaft of the motor, a second bevel gear and a worm are arranged on the transmission shaft, and the second bevel gear is meshed with the first bevel gear; the worm is symmetrically meshed with a pair of bevel gears on two sides, the bevel gears are connected with the input end of the planetary gear reducer, and the threaded rod is connected with the output end of the planetary gear reducer. The transmission assembly has reasonable reduction ratio and compact structural layout, and when the transmission assembly works, the rotary driving force of the motor sequentially passes through the first bevel gear, the second bevel gear, the transmission shaft, the worm, the bevel gear, the planetary gear reducer and the threaded rod, and finally is converted into linear motion of the sliding block. In the transmission process, the self-locking function can be realized through the threaded matching of the threaded rod and the sliding block, and the self-locking function can also be realized through the matching of the worm and the bevel gear, but because the threaded matching of the threaded rod and the sliding block is closer to the output end, the self-locking function mainly comes from the matching, and meanwhile, the overlarge stress of a transmission structure between the threaded rod and the motor is avoided.

Further, the planetary gear reducer is disc-shaped as a whole, an external gear ring of the planetary gear reducer is fixedly arranged, a sun gear is an input end, and a planet carrier is an output end; one side of the bevel gear, which is close to the planetary gear reducer, is provided with a concave area, and the planetary gear reducer is accommodated in the concave area so as to save space occupation.

The beneficial effects are that: compared with the prior art, the floating type oil-electricity hybrid braking device provided by the utility model adopts a unique layout form that a hydraulic driving device and an electric driving device are oppositely arranged, adopts the electric driving device with a self-locking function, and further adopts the hydraulic driving device and the electric driving device with multi-point power output. The utility model shortens the braking response time, improves the braking force, and effectively solves the defect that the traditional EPB braking response speed and the braking force cannot be taken into account. Meanwhile, the utility model has the dual functions of service braking and parking braking and has the advantages of good braking stability, small space occupation and the like.

Drawings

Fig. 1 and 2 are perspective views of the present utility model.

FIG. 3 is a schematic representation of the present utility model in semi-section.

Fig. 4 is a partial enlarged view of fig. 3.

Fig. 5 is an exploded view of the present utility model.

Fig. 6 is a schematic view of the structure of the inside of the guide housing.

Fig. 7 and 8 are schematic structural views of the transmission assembly.

In the drawing, a clamp frame 1, a clamp body 2, a clamp jaw 21, a first friction plate 22, a second friction plate 23, a guide post 13, a guide post hole 24, an oil cylinder shell 111, a piston cavity 112, a piston 113, an oil filling hole 114, a guide shell 121, a sliding block 122, a threaded rod 123, a motor 124, a transmission assembly 125, a first bevel gear 1251, a second bevel gear 1252, a transmission shaft 1253, a worm 1254, a bevel gear 1255 and a planetary gear reducer 1256.

Detailed Description

The utility model is further illustrated by the following examples, which are intended to more clearly illustrate the technical solution of the utility model and should not be construed as limiting.

Unless defined otherwise, technical or scientific terms used herein should be understood as having the ordinary meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Example 1

A floating type oil-electricity hybrid braking device, as shown in figures 1 to 8, comprises a clamp frame 1 and a clamp body 2 which is in sliding connection with the clamp frame 1; the caliper body 2 is provided with a jaw 21 which can accommodate a brake disc; friction plates are respectively arranged on the two sides of the clamp body 2 and positioned on the clamp jaws 21 and are respectively marked as a first friction plate 22 and a second friction plate 23, and the friction plates on the two sides are in sliding connection with the clamp body 2; a hydraulic driving device and an electric driving device are also oppositely arranged on the clamp frame 1 and positioned on two sides of the clamp body 2; the hydraulic driving device can push the first friction plate 22 to move towards the direction approaching the second friction plate 23, and the electric driving device can push the second friction plate 23 to move towards the direction approaching the first friction plate 22.

In this embodiment, the electric driving device has a self-locking function; the pushing speed of the electric driving device is greater than that of the hydraulic driving device.

In this embodiment, two guide posts 13 are disposed on the clamp frame 1, the guide posts 13 are parallel to each other, a guide post hole 24 is disposed on the clamp body 2 and matched with the guide posts 13, and the guide posts 13 slidably penetrate through the guide post hole 24.

In this embodiment, both ends of the first friction plate 22 and the second friction plate 23 are provided with protruding portions, and the caliper body 2 is provided with recessed portions corresponding to the protruding portions; the protruding part is slidably clamped in the recessed part.

In this embodiment, the hydraulic driving device includes an oil cylinder shell 111 fixed on the jaw 1, a piston cavity 112 is formed in one side of the oil cylinder shell 111, which is close to the first friction plate 22, and two mutually communicated piston cavities 112 are arranged in parallel in the oil cylinder shell 111, a piston 113 is slidably arranged in each piston cavity 112, and an end of the piston 113 is close to the first friction plate 22; an oil filler hole 114 leading to the piston chamber 112 is opened in the cylinder case 111 at a side away from the first friction plate 22.

In this embodiment, the electric driving device includes a guide housing 121, a slider 122, a threaded rod 123, a motor 124, and a transmission assembly 125; the guide shell 121 is fixed on the clamp frame 1, a sliding block 122 capable of sliding towards the second friction plate 23 is arranged in the guide shell 121, and one end of the sliding block 122 is connected with a threaded rod 123 in a threaded fit manner; the rotation driving force of the motor 124 drives the threaded rod 123 to rotate via the transmission assembly 125.

In this embodiment, a pair of sliding blocks 122 are disposed in parallel in the guide housing 121, and each sliding block 122 is respectively connected to a threaded rod 123 in a matching manner; the drive assembly 125 is powered by a motor 124 that simultaneously drives the rotation of the two threaded rods 123.

In this embodiment, the transmission assembly 125 includes a first bevel gear 1251, a second bevel gear 1252, a transmission shaft 1253, a worm 1254, a pair of bevel gears 1255, a pair of planetary gear reducers 1256; a first bevel gear 1251 is provided on the output shaft of the motor 124; a transmission shaft 1253 is arranged perpendicular to the output shaft of the motor 124, a second bevel gear 1252 and a worm 1254 are arranged on the transmission shaft 1253, and the second bevel gear 1252 is meshed with the first bevel gear 1251; a pair of bevel gears 1255 are symmetrically meshed on two sides of the worm 1254, the bevel gears 1255 are connected with the input end of the planetary gear reducer 1256, and the threaded rod 123 is connected with the output end of the planetary gear reducer 1256.

In this embodiment, the planetary gear reducer 1256 is in a disc shape as a whole, an external gear ring is fixedly arranged, a sun gear is an input end, and a planet carrier is an output end; the bevel gear 1255 is provided with a recessed area on a side thereof adjacent to the planetary gear reducer 1256, and the planetary gear reducer 1256 is accommodated in the recessed area.

It will be apparent that the above embodiments are illustrative, and are only some, but not all, embodiments of the utility model. Other embodiments, which can be obtained by those skilled in the art without creative efforts, are also intended to be within the scope of protection of the present utility model based on the described embodiments.

Claims

1. A floating type oil-electricity hybrid braking device is characterized in that: comprises a clamp frame (1) and a clamp body (2) which is connected with the clamp frame (1) in a sliding way; the clamp body (2) is provided with a jaw (21) which can accommodate a brake disc; friction plates are respectively arranged on the two sides of the clamp body (2) and positioned on the clamp mouth (21), and are respectively marked as a first friction plate (22) and a second friction plate (23), and at least one side of the friction plates on the two sides is in sliding connection with the clamp body (2); a hydraulic driving device and an electric driving device are also oppositely arranged on the clamp frame (1) and positioned on two sides of the clamp body (2); the hydraulic driving device can push the first friction plate (22) to move towards the direction approaching the second friction plate (23), and the electric driving device can push the second friction plate (23) to move towards the direction approaching the first friction plate (22).

2. The floating hybrid electro-hydraulic brake system of claim 1, wherein: the electric driving device has a self-locking function; the pushing speed of the electric driving device is greater than that of the hydraulic driving device.

3. The floating hybrid electro-hydraulic brake system of claim 1, wherein: at least two guide posts (13) are arranged on the clamp frame (1), the guide posts (13) are parallel to each other, guide post holes (24) matched with the guide posts (13) are formed in the clamp body (2), and the guide posts (13) can be slidably arranged in the guide post holes (24) in a penetrating mode.

4. The floating hybrid electro-hydraulic brake system of claim 1, wherein: the first friction plate (22) and the second friction plate (23) are both in sliding connection with the clamp body (2); the two ends of the first friction plate (22) and the second friction plate (23) are respectively provided with a convex part, and the clamp body (2) is provided with a concave part corresponding to the convex part; the protruding part is slidably clamped in the recessed part.

5. The floating hybrid electro-hydraulic brake system of claim 1, wherein: the hydraulic driving device comprises an oil cylinder shell (111) fixed on the clamp frame (1), at least one piston cavity (112) is formed in one side, close to the first friction plate (22), of the oil cylinder shell (111), a piston (113) is slidably arranged in each piston cavity (112), and the end part of each piston (113) is in close contact with the first friction plate (22); an oil filling hole (114) which leads to the piston cavity (112) is formed in the oil cylinder shell (111) and is positioned at one side far away from the first friction plate (22).

6. The floating electro-pneumatic hybrid brake system of claim 5, wherein: two mutually communicated piston cavities (112) are arranged in parallel in the oil cylinder shell (111).

7. The floating hybrid electro-hydraulic brake system of claim 1, wherein: the electric driving device comprises a guide shell (121), a sliding block (122), a threaded rod (123), a motor (124) and a transmission assembly (125); the guide shell (121) is fixed on the clamp frame (1), a sliding block (122) capable of sliding towards the second friction plate (23) is arranged in the guide shell (121), and one end of the sliding block (122) is connected with a threaded rod (123) in a threaded fit manner; the rotation driving force of the motor (124) drives the threaded rod (123) to rotate through the transmission assembly (125).

8. The floating electro-pneumatic hybrid brake system of claim 7, wherein: a pair of sliding blocks (122) are arranged in the guide shell (121) in parallel, and each sliding block (122) is respectively connected with a threaded rod (123) in a matched mode; the transmission assembly (125) is powered by a motor (124) which simultaneously drives the rotation of the two threaded rods (123).

9. The floating electro-pneumatic hybrid brake system of claim 8, wherein: the transmission assembly (125) comprises a first bevel gear (1251), a second bevel gear (1252), a transmission shaft (1253), a worm (1254), a pair of bevel gears (1255) and a pair of planetary gear reducers (1256); the first bevel gear (1251) is arranged on the output shaft of the motor (124); the transmission shaft (1253) is perpendicular to the output shaft of the motor (124), a second bevel gear (1252) and a worm (1254) are arranged on the transmission shaft (1253), and the second bevel gear (1252) is meshed with the first bevel gear (1251); the worm (1254) is symmetrically meshed with a pair of bevel gears (1255) on two sides, the bevel gears (1255) are connected with the input end of the planetary gear reducer (1256), and the threaded rod (123) is connected with the output end of the planetary gear reducer (1256).

10. The floating hybrid electro-hydraulic brake system of claim 9, wherein: the planetary gear reducer (1256) is integrally disc-shaped, an external gear ring of the planetary gear reducer is fixedly arranged, a sun gear is an input end, and a planet carrier is an output end; a concave area is arranged on one side of the bevel gear (1255) close to the planetary gear reducer (1256), and the planetary gear reducer (1256) is accommodated in the concave area.