阅读说明：本技术 一种油电混合制动装置 (Oil-electricity hybrid brake device ) 是由 史海坤 黄建昌 芮正国 张体波 于 2021-08-02 设计创作，主要内容包括：本发明属于制动执行器技术领域,具体涉及一种油电混合制动装置。该制动装置包括钳架和与钳架滑动连接的钳体；钳体中具有可容纳刹车盘的钳口；在钳体上且位于钳口的两侧各设有摩擦片,分别记为第一摩擦片和第二摩擦片,在钳架上且位于钳体的两侧还相对地设有液压驱动装置和电力驱动装置；液压驱动装置能够顶推第一摩擦片向靠近第二摩擦片的方向移动,电力驱动装置能够顶推第二摩擦片向靠近第一摩擦片的方向移动。本发明既缩短了制动响应时间,又提高了制动力度,有效解决了传统EPB制动响应速度和制动力度无法兼顾的缺陷。同时,本发明具有行车制动和驻车制动的双重功能,具有制动稳定性佳、空间占用少等优点。(The invention belongs to the technical field of brake actuators, and particularly relates to an oil-electricity hybrid brake device. The braking device comprises a clamp frame and a clamp body which is connected with the clamp frame in a sliding way; the clamp body is provided with a jaw capable of accommodating a brake disc; friction plates are respectively arranged on the caliper body and positioned on two sides of the jaw, and are respectively marked as a first friction plate and a second friction plate, and a hydraulic driving device and an electric driving device are oppositely arranged on the caliper frame and positioned on two sides of the caliper 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 invention shortens the braking response time, improves the braking force, and effectively overcomes the defect that the traditional EPB braking response speed and the braking force can not be considered at the same time. Meanwhile, the invention has the double functions of service braking and parking braking, and has the advantages of good braking stability, small occupied space and the like.)

1. A hybrid brake device of oil electricity which 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) capable of accommodating a brake disc; friction plates are respectively arranged on the pliers body (2) and positioned on two sides of the jaw (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 pliers body (2); a hydraulic driving device and an electric driving device are 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 close to the second friction plate (23), and the electric driving device can push the second friction plate (23) to move towards the direction close to the first friction plate (22).

2. The hybrid oil-electric brake device according to claim 1, characterized in that: 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 hybrid oil-electric brake device according to claim 1, characterized in that: the clamp is characterized in that at least two guide columns (13) are arranged on the clamp frame (1), the guide columns (13) are parallel to each other, guide column holes (24) matched with the guide columns (13) are formed in the clamp body (2), and the guide columns (13) are slidably arranged in the guide column holes (24) in a penetrating mode.

4. The hybrid oil-electric brake device according to claim 1, characterized in that: the first friction plate (22) and the second friction plate (23) are both connected with the clamp body (2) in a sliding manner; both ends of the first friction plate (22) and the second friction plate (23) are provided with protruding parts, and the clamp body (2) is provided with concave parts corresponding to the protruding parts; the convex part is slidably clamped in the concave part.

5. The hybrid oil-electric brake device according to claim 1, characterized in that: the hydraulic driving device comprises a 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 cylinder shell (111), a piston (113) is slidably arranged in each piston cavity (112), and the end part of each piston (113) is abutted to the first friction plate (22); an oil filling hole (114) communicated with the piston cavity (112) is formed in the oil cylinder shell (111) and on the side far away from the first friction plate (22).

6. The hybrid oil-electric brake device according to claim 5, characterized in that: two piston cavities (112) which are communicated with each other are arranged in parallel in the oil cylinder shell (111).

7. The hybrid oil-electric brake device according to claim 1, characterized in that: 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 a threaded rod (123) is connected to one end of the sliding block (122) in a threaded fit manner; the rotary driving force of the motor (124) drives the threaded rod (123) to rotate through the transmission component (125).

8. The hybrid oil-electric brake device according to claim 7, characterized in that: a pair of sliding blocks (122) is arranged in the guide shell (121) in parallel, and each sliding block (122) is respectively connected with a threaded rod (123) in a matching way; the transmission assembly (125) is powered by a motor (124) and drives the two threaded rods (123) to rotate simultaneously.

9. The hybrid oil-electric brake device according to claim 8, characterized in that: 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 an output shaft of the motor (124); the transmission shaft (1253) is perpendicular to an 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); two sides of the worm (1254) are symmetrically meshed with a pair of bevel gears (1255), 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 hybrid brake device according to claim 9, characterized in that: the planetary gear reducer (1256) is integrally disc-shaped, an outer gear ring of the planetary gear reducer is fixedly arranged, a sun gear serves as an input end, and a planet carrier serves as an output end; one side of the helical gear (1255) close to the planetary gear reducer (1256) is provided with a recessed area, and the planetary gear reducer (1256) is accommodated in the recessed area.

Technical Field

The invention belongs to the technical field of brake actuators, and particularly relates to an oil-electricity hybrid brake device.

Background

At present, Electronic Parking Systems (EPBs) for motor vehicles mostly adopt integrated calipers. The integrated caliper brakes (service brake) in the running process of the motor vehicle by squeezing friction between a friction plate and a brake disc in a hydraulic mode to provide larger braking force, so that the speed of the motor vehicle is rapidly reduced; the brake (parking brake) when the motor vehicle stops is to prevent the vehicle from moving or sliding on a slope by extruding friction plates and brake discs to rub through an electronic parking actuating mechanism.

In the process of practice and research, the existing EPB has some defects which are difficult to overcome due to the limitation of the structural layout and the working mode. In a non-braking state, a certain free gap must be left between the brake disc and the friction plate, and the size of the free gap cannot be infinitely reduced due to the limitation of factors such as thermal expansion and cold contraction, driving vibration, dust in air and the like. The time during which the friction linings move to compress the free gap during braking therefore adds an additional response time to the braking, which is insignificant during parking braking, but which has a considerable influence on the braking and safety of the vehicle during driving braking, a response time of 0.1s corresponding to a braking distance of around 3m during high-speed driving of the vehicle. In addition, since a vehicle requires a very large braking force when braking in a traveling manner, a hydraulic braking system is adopted. The hydraulic braking mode is that high-pressure oil is injected into the oil cylinder by using a hydraulic power source so as to push the friction plate to extrude the brake disc. Under the condition of certain power of the hydraulic power source, the traveling speed and the extrusion force of the friction plates are in opposite correlation, so that in order to ensure enough extrusion force, the traveling speed of the friction plates is greatly limited, and correspondingly, long extra 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 in the prior art, the invention provides an oil-electricity hybrid brake device.

The invention provides an oil-electricity hybrid brake device, which comprises a caliper frame and a caliper body in sliding connection with the caliper frame; the clamp body is provided with a jaw capable of accommodating a brake disc; friction plates are respectively arranged on the caliper body and positioned on two sides of the jaw, and are respectively marked as a first friction plate and a second friction plate, and at least one side of the friction plates on the two sides is in sliding connection with the caliper body; a hydraulic driving device and an electric driving device are 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, the friction plates on the two sides are respectively connected with the clamp body in a sliding mode, the friction plate on one side is connected with the clamp body in a sliding mode, and the friction plate on the other side is fixedly connected with the clamp body. The pushing speed of the electric driving device is preferably greater than that of the hydraulic driving device, and more preferably greater than 3 times that of the hydraulic driving device. The electric driving device preferably has 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, the self-locking function refers to that only one-way transmission can be realized, and if reverse transmission is adopted, locking can be realized due to the limitation of the transmission structure. In reality, there are many transmission structures with self-locking function, for example, the threaded rod and the threaded sleeve are in matched transmission, when the lead angle of the threaded rod is smaller than the equivalent friction angle, the rotational motion of the threaded rod can drive the linear motion of the threaded sleeve, and the linear motion of the threaded sleeve cannot drive the rotational motion of the threaded rod, i.e., the self-locking function is achieved; similarly, the matching of the worm with the worm wheel and the helical gear can realize the self-locking function, and the matching of the ratchet wheel and the pawl can also realize the self-locking function.

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

More preferably, the braking mode is as follows:

when parking and braking are 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 tightly.

When the automobile is braked in a running process, the hydraulic driving device and the electric driving device work together to clamp the brake disc.

Generally, 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 both faster than those of the hydraulic driving device. Therefore, the braking mode has the following advantages:

firstly, the braking force required by parking braking is relatively small but the required duration is long, and the self-locking electric driving device is adopted, so that the requirement of the braking force can be met, no energy is consumed during locking, 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, a mode that a hydraulic driving device and an electric driving device work together is adopted, 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, and the electric driving device stops working and performs self-locking after reaching the maximum driving force. During the operation of the electric driving device, the hydraulic driving device responds to press the friction plates, and the electric driving device can generate self-locking, so that the pressure between the friction plates can be continuously increased along with the pressing of the hydraulic driving device until the maximum pressure of the hydraulic driving device is reached. Therefore, the hydraulic brake device can quickly reduce the free gap, realize quick brake response, and simultaneously enable the hydraulic drive device to quickly reach the maximum pressure, so that the hydraulic brake device has high brake force and quick response speed.

Thirdly, due to the matching of the electric driving devices which are oppositely arranged, the free gap is quickly reduced, 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 higher braking force is obtained. Although the increase of the sectional area of the hydraulic oil 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 have obvious influence on additional response time any more, and the braking force can be increased under the condition that the response speed is hardly influenced; without the cooperation of the electric drive, increasing the braking effort in this manner would significantly increase the additional response time, causing brake hesitation.

The invention relates to a floating type braking device, namely a caliper body and a caliper frame are arranged in a sliding manner. Specifically, the clamp frame is provided with at least two guide pillars which are parallel to each other, the clamp body is provided with a guide pillar hole matched with the guide pillar, and the guide pillar is slidably arranged in the guide pillar hole in a penetrating manner.

Furthermore, the first friction plate and the second friction plate are both connected with the clamp body in a sliding manner; both ends of the first friction plate and the second friction plate are provided with protruding parts, and the clamp body is provided with a concave part corresponding to the protruding parts; the convex part is slidably clamped in the concave part.

Furthermore, 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 abutted to the first friction plate; an oil filling hole leading to the piston cavity is formed in the oil cylinder shell and is positioned on one side far away from the first friction plate. The piston is pushed to move by injecting hydraulic oil into the oil injection hole, so that the first friction plate is pushed. Furthermore, in order to improve the sealing performance, an annular groove can be formed in the inner wall of the piston cavity, and a rubber sealing ring is embedded in the groove.

Furthermore, two piston cavities which are communicated with each other 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.

Furthermore, 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 rotary 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 push the second friction plate.

Furthermore, a pair of sliding blocks are arranged in the guide shell in parallel, and each sliding block is respectively matched and connected with a threaded rod; the transmission assembly is powered by a motor and drives the two threaded rods to rotate simultaneously.

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 output shaft of the motor; the transmission shaft is perpendicular to an output shaft of the motor, and is provided with a second bevel gear and a worm, and the second bevel gear is meshed with the first bevel gear; the two sides of the worm are symmetrically engaged with a pair of helical gears, the helical 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 helical gear, the planetary gear reducer and the threaded rod and is finally converted into linear motion of the sliding block. In the transmission process, the threaded matching of the threaded rod and the sliding block can realize the self-locking function, the matching of the worm and the helical gear can also realize the self-locking function, but the threaded matching of the threaded rod and the sliding block is closer to the output end, so the self-locking function is mainly from the matching, and the overlarge stress of a transmission structure between the threaded rod and the motor is also avoided.

Furthermore, the whole planet gear speed reducer is disc-shaped, an outer gear ring of the planet gear speed reducer is fixedly arranged, a sun gear is an input end, and a planet carrier is an output end; one side of the helical gear, which is close to the planetary gear reducer, is provided with a depressed area, and the planetary gear reducer is accommodated in the depressed area, so that the space occupation is saved.

Has the advantages that: compared with the prior art, the oil-electric hybrid brake device provided by the invention adopts a unique layout mode that the hydraulic drive device and the electric drive device are oppositely arranged, adopts the electric drive device with a self-locking function, and further adopts the hydraulic drive device and the electric drive device with multi-point power output. The invention shortens the braking response time, improves the braking force, and effectively overcomes the defect that the traditional EPB braking response speed and the braking force can not be considered at the same time. Meanwhile, the invention has the double functions of service braking and parking braking, and has the advantages of good braking stability, small occupied space and the like.

Drawings

Fig. 1 and 2 are perspective views of the present invention.

FIG. 3 is a schematic half-section view of the present invention.

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

Fig. 5 is an exploded view of the present invention.

Fig. 6 is a schematic structural view of the interior of the guide housing.

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

In the figure, a caliper frame 1, a caliper body 2, a 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 slider 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 invention is further illustrated by the following examples, which are intended to illustrate the technical solutions of the invention more clearly and are not to be construed as a limitation.

Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example 1

A hybrid oil-electric brake device is shown in figures 1 to 8 and comprises a caliper frame 1 and a caliper body 2 connected with the caliper frame 1 in a sliding manner; the caliper body 2 is provided with a jaw 21 capable of accommodating a brake disc; friction plates are respectively arranged on the caliper body 2 and positioned on two sides of the jaw 21 and 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 caliper body 2; a hydraulic driving device and an electric driving device are 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 close to the second friction plate 23, and the electric driving device can push the second friction plate 23 to move towards the direction close to 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, the caliper bracket 1 is provided with two guide posts 13, the guide posts 13 are parallel to each other, the caliper body 2 is provided with a guide post hole 24 matched with the guide post 13, and the guide post 13 slidably penetrates through the guide post hole 24.

In this embodiment, the first friction plate 22 and the second friction plate 23 are provided with protrusions at both ends thereof, and the caliper body 2 is provided with recesses corresponding to the protrusions; the convex part is slidably clamped in the concave part.

In this embodiment, the hydraulic driving device includes a cylinder housing 111 fixed on the caliper bracket 1, a piston cavity 112 is formed in one side of the cylinder housing 111 close to the first friction plate 22, two piston cavities 112 communicated with each other are arranged in parallel in the cylinder housing 111, a piston 113 is slidably arranged in each piston cavity 112, and an end of the piston 113 abuts against the first friction plate 22; an oil filling hole 114 leading to the piston chamber 112 is opened in the cylinder case 111 on the side remote from the first friction plate 22.

In this embodiment, the electric driving device includes a guiding housing 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 caliper 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 rotational driving force of the motor 124 rotates the threaded rod 123 via the transmission assembly 125.

In this embodiment, a pair of sliding blocks 122 are disposed in parallel in the guiding shell 121, and each sliding block 122 is respectively connected with a threaded rod 123 in a matching manner; the transmission assembly 125 is powered by a motor 124 which 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 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 engaged with a pair of bevel gears 1255 on both sides, the bevel gear 1255 is 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 integrally disc-shaped, an outer gear ring thereof is fixedly arranged, a sun gear is an input end, and a planet carrier is an output end; the side of the helical gear 1255 adjacent the planetary gear reducer 1256 is provided with a recessed area in which the planetary gear reducer 1256 is received.

It is to be understood that the above embodiments are exemplary, and are only some, but not all, embodiments of the present invention. Other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the described embodiments, shall also fall within the scope of protection of the present invention.