CN114483822B - Linear control actuator - Google Patents
Linear control actuator Download PDFInfo
- Publication number
- CN114483822B CN114483822B CN202210222130.4A CN202210222130A CN114483822B CN 114483822 B CN114483822 B CN 114483822B CN 202210222130 A CN202210222130 A CN 202210222130A CN 114483822 B CN114483822 B CN 114483822B
- Authority
- CN
- China
- Prior art keywords
- curved surface
- brake
- piston
- outer piston
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/54—Slack adjusters mechanical self-acting in one direction for adjusting excessive play by means of direct linear adjustment
Abstract
The invention relates to a linear actuator which comprises a wedge block, an outer piston, an inner piston, an elastic positioning device and the like. The actuating mechanism of the brake pushes the inner piston, the inner piston compresses the wedge block, the inner piston and the outer piston are relatively positioned through the wedge block, the outer piston is pushed to move, and the friction plate is pressed, so that the efficient braking effect is realized. The invention has simple structure, reliable operation and high braking efficiency, can automatically adjust the braking gap, has self-boosting effect, can compensate the influence caused by the abrasion of the friction plate, simplifies the design of a control system, and can be used for service braking and parking braking.
Description
Technical Field
The invention relates to the field of brakes, in particular to a wire control mechanical brake capable of replacing the existing disc type hydraulic brake, realizing that friction plates clamp a brake disc from two sides by the same pressure in an electric control mechanical mode, simultaneously realizing that a braking gap is adjustable and the braking strength is adjustable, and in particular relates to a wire control brake.
Background
The brake-by-wire technology is a novel brake technology which appears in recent years, mechanical or hydraulic connection is not relied on between a brake and a brake pedal, a control system receives information of a sensor to control an actuating motor to work, and an actuating device is driven to enable friction plates to press a brake disc from two sides, so that stable and reliable brake control of an automobile is realized. The brake-by-wire system is favorable for optimizing the braking performance of the whole vehicle, and can be conveniently integrated with other electronic control systems such as ABS, ASR, ESP, so that the brake-by-wire system has a wide development space.
Currently under development, brake-by-wire systems mainly include an electrohydraulic brake system (EHB) and an electromechanical brake system (EMB). An electromechanical brake system (EMB) realizes a braking process by a motor-driven mechanical mechanism, hydraulic components are omitted, the structure of the brake system is greatly simplified, and the brake is easier to arrange, assemble and overhaul. However, the existing electromechanical braking system often lacks a function of automatically adjusting a braking gap at a brake part, so that the problems of unstable brake operation, variable working efficiency and the like are caused under the conditions of external environment change and friction plate abrasion of the brake, and certain difficulty is brought to braking efficiency control. Meanwhile, most of the brakes have the problems of complex structure, large installation size and the like.
The current electromechanical brake is mostly designed based on a disc brake, and a wedge mechanism is introduced into the electromechanical brake, so that a self-boosting effect can be generated, and a larger braking efficiency can be obtained through a smaller motor driving force. The self-boosting is realized by adopting the wedge mechanism, and meanwhile, the working characteristics of the actuating part are different under the condition of different friction plate thicknesses of the brake due to the influence of the wedge mechanism, so that the difficulty is brought to the braking efficiency control of the brake in the whole life cycle.
Disclosure of Invention
The invention aims to provide a wire control actuator. The invention has the advantages of simple structure, reliable operation and the like, can realize the automatic adjustment of the braking clearance, and simultaneously, the clearance adjusting function is completely realized by the piston part by installing the wedge-shaped block between the outer piston and the inner piston, thereby realizing the self-boosting braking effect and simultaneously keeping the stable working characteristic of the actuating part of the brake.
The technical scheme for realizing the purpose of the invention is as follows:
the brake-by-wire device comprises a brake caliper body, two friction plates, a brake disc and an actuating device, wherein the two friction plates are symmetrically arranged on two sides of the brake disc, and one friction plate is arranged on the brake caliper body; the method is characterized in that: the device also comprises a wedge block, an outer piston and an inner piston; the outer piston is arranged in the brake caliper body in a clearance fit manner, one end of the outer piston is provided with the friction plate, and the other end of the outer piston comprises a curved surface structure with a certain curvature; the inner piston is arranged in the brake caliper body, one end of the inner piston is connected with the actuating device of the brake, and the other end of the inner piston comprises a curved surface structure with a certain curvature; the wedge block is arranged between the outer piston and the inner piston, and two ends of the wedge block are respectively provided with curved surface structures matched with the outer piston and the inner piston and are respectively contacted and matched with each other to form a contact curved surface.
The brake caliper further comprises an elastic positioning device, one part of the elastic positioning device is fixedly arranged on the brake caliper body, a larger friction force is arranged between the other part of the elastic positioning device and the outer piston, and when the outer piston and the brake caliper body are relatively displaced, elastic potential energy is generated in the elastic positioning device due to the friction force.
Further comprising a roller, an actuating element; the wedge-shaped block is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depths of the groove along the contact curved surface are different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth; or the outer piston is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depths of the groove along the contact curved surface are different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth; or the inner piston is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depth of the groove along the contact curved surface is different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth.
The device also comprises a retainer and a friction block; the wedge-shaped block is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter; or the outer piston is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter; or the inner piston is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter.
The contact curved surface adopts one of inclined surface/arc surface/hyperbolic surface/parabolic surface or the combination of the above curved surfaces.
The wedge block is arranged between the outer piston and the inner piston and can be self-locked, namely, the pressing force along the directions of the outer piston and the inner piston can not move the wedge block relative to the outer piston or the inner piston.
The contact curved surfaces on two sides of the wedge-shaped block are symmetrically arranged.
The technical scheme of the invention has at least the following advantages:
the gap generated by the abrasion of the friction plate of the brake is automatically compensated through the shape and position change of the wedge-shaped block.
Through the function of the contact curved surfaces at the two sides of the wedge-shaped block, the self-boosting braking effect of the brake can be realized when the brake disc rotates in the forward and reverse directions.
The clearance compensation is completely realized in the piston part, so that the actuating device of the brake can always work in the same state and is not influenced by the thickness of the friction plate, and the mechanism design, the power selection and the like of the actuating device part are more free.
The brake has the advantages of high response speed, high reliability, complete combination of mature mechanical mechanisms and constant mutual contact among all the mechanical mechanisms, so that the gap of the brake only exists between the brake disc and the friction plate, the rigidity of the inner piston, the outer piston and the wedge block is high, the deformation is small in the working process, and the time consumption caused by factors such as internal gap elimination and element deformation is reduced.
Drawings
Fig. 1 is a front view of a first embodiment of a brake-by-wire of the present invention.
Fig. 2 is a front view of a second embodiment of a brake-by-wire of the present invention.
Fig. 3 is a partial schematic view of a third embodiment of a brake-by-wire of the present invention.
The reference numerals in the drawings indicate: 1-actuating spring 2-snap ring 3-roller 4-positioning spring 5-outer piston 6-inner piston 7-spring 8-brake caliper body 9-brake disc 10-friction plate 11-wedge block 12-sealing ring 13-friction block 14-retainer A-A group curved surface B-B group curved surface C-friction block large diameter D-friction block small diameter.
Detailed Description
An embodiment of the present invention will be described in detail with reference to fig. 1.
As shown in fig. 1, a brake-by-wire comprises a brake caliper body 8, a brake disc 9 is arranged in a jaw of the brake caliper body 8, friction plates 10 are arranged on two sides of the brake disc 9, one brake disc is arranged on the brake caliper body 8, one brake disc is arranged on an outer piston 5, the outer piston 5 is arranged on the brake caliper body 8 through a sealing ring 12, a large friction force exists between the contact surface of the sealing ring 12 and the outer piston 5, and when the displacement of the outer piston 5 is in the elastic deformation range of the sealing ring 12, no relative movement exists between the contact surface of the sealing ring 12 and the outer piston 5. The other end of the outer piston 5 is a contact curved surface formed by combining a group A curved surface and a group B curved surface, the contact curved surface is matched and installed with a wedge block 11 which is also formed by combining the group A curved surface and the group B curved surface, the other side of the wedge block 11 is matched and installed with an inner piston 6 by the same contact curved surface, and the inner piston 6 is installed on a brake caliper body 8 and connected with an actuating device of a brake.
During braking, the actuating device drives the inner piston 6 to move leftwards, the wedge block 11 is pressed by the contact curved surface, the outer piston 5 is pressed by the contact curved surface, the group A curved surface and the group B curved surface are simultaneously in close contact, at the moment, the actuating device simultaneously pushes the brake caliper body 8 to move rightwards, namely the outer piston 5 and the brake caliper body 8 move in opposite directions, so that the friction plates 10 press the brake disc 9 from two sides, when the friction plates 10 are contacted with the brake disc 9 to generate friction force, the outer piston 5 moves upwards along the friction force direction under the assumption that the friction force is upward, and the outer piston 5 is integrally and upwards moved with the wedge block 11 through the close contact of the outer piston 5 with the group A curved surface in the contact curved surface of the wedge block 11, and the group A curved surface is separated from the contact curved surface of the inner piston 6, so as to realize the self-boosting braking effect along the group B curved surface; and at this time, the contact curved surfaces of the wedge block 11 and the inner piston 6 are integrally contacted tightly through the A group curved surfaces, the A group curved surfaces are separated from the contact curved surfaces of the outer piston 5 and the wedge block 11, and the A group curved surfaces relatively move along the B group curved surfaces, so that a self-boosting braking effect is realized.
The actuating device pushes the brake caliper body 8 to move rightward, the outer piston 5 moves leftward, and when the maximum braking strength is reached, the outer piston 5 is not contacted with the mounting hole. At this time, the seal ring 12 is elastically deformed, elastic potential energy is stored, and no relative movement exists between the contact surfaces of the seal ring 12 and the outer piston 5. When the brake is released, the actuating device drives the brake caliper body 8 and the inner piston 6 to move reversely, so that the elastic potential energy stored by the sealing ring 12 is released, the outer piston 5 and the brake caliper body 8 move relatively, and all elements are restored to the initial positions.
When the friction plate 10 is worn and the thickness is thinned and the brake works, the actuating device pushes the outer piston 5 and the brake caliper body 8 to move relatively, and when the elastic deformation of the sealing ring 12 reaches the maximum, the braking effect is poor due to the fact that the friction plate 10 is worn, at the moment, the actuating device drives the outer piston 5 and the brake caliper body 8 to move relatively continuously, so that the sealing ring 12 keeps the maximum elastic deformation, and the outer piston 5 overcomes the friction force between the sealing ring 12 and is matched with a new contact surface, namely, the displacement of the outer piston 5 relative to the brake caliper body 8 is larger than the maximum elastic deformation of the sealing ring 12. When the brake is released, the elastic potential energy of the sealing ring 12 is released, so that the outer piston 5 and the brake caliper body 8 relatively move, at the moment, the sealing ring 12 and the outer piston 5 are matched and positioned by a new contact surface, after the elastic potential energy of the sealing ring 12 is completely released, the relative positions of the outer piston 5 and the brake caliper body 8 are kept unchanged, the actuating device drives the brake caliper body 8 and the inner piston 6 to continue to move so as to return to the initial position, at the moment, the distance between the inner piston 6 and the outer piston 5 is increased, a gap appears between the wedge 11 and the contact curved surface of the inner piston 6/the outer piston 5, when the gap reaches a certain value, the wedge 11 falls down by an adjusting unit under the action of gravity, the curved surface A contacts with the curved surface A adjacent to the lower side to form a new A-group curved surface, and the same curved surface B also contacts with the curved surface B adjacent to the lower side to form a new B-group curved surface, and the gap compensation is realized by utilizing the wedge characteristic of the wedge. At this time, the return displacement of the outer piston 5 and the caliper body 8 is still the maximum elastic deformation of the seal ring 12, so that the same braking gap as before abrasion is maintained, and automatic adjustment of the braking gap is realized.
Another embodiment of the present invention will be described with reference to fig. 2.
The embodiment of fig. 2 differs from the embodiment of fig. 1 mainly as follows:
different from the elastic positioning device, in fig. 1, the elastic positioning function is realized by adopting the sealing ring 12, and elastic potential energy is stored by utilizing the elastic deformation of the sealing ring 12; in fig. 2, a positioning spring 4 and a clamping ring 2 are adopted to realize an elastic positioning function, and elastic potential energy is stored by using elastic deformation generated by the positioning spring 4.
The movement power of the wedge blocks is different, in fig. 1, the wedge blocks 11 are moved towards the wedge direction by utilizing the gravity of the wedge blocks 11, and in fig. 2, the wedge blocks 11 are moved towards the wedge direction by the springs 7.
The contact curved surfaces are different, the contact curved surfaces in fig. 1 are formed by combining two groups of curved surfaces, and the contact curved surfaces in fig. 2 can be single inclined surfaces, parabolic surfaces, hyperbolic surfaces or the like.
The limit modes of the contact curved surfaces are different, in fig. 1, a group of curved surfaces in the contact curved surfaces are used for realizing the relative fixation of the wedge block 11 and the inner piston 6 or the outer piston 5, and in fig. 2, the groove features on the contact curved surfaces, the rollers 3 and the actuating springs 1 arranged in the grooves are used for realizing the relative fixation of the wedge block 11 and the inner piston 6 or the outer piston 5.
As shown in fig. 2, a brake disc 9 is arranged in a jaw of the brake caliper body 8, friction plates 10 are arranged on two sides of the brake disc 9, one is arranged on the brake caliper body 8, the other is arranged on the outer piston 5, the outer piston 5 is arranged on the brake caliper body 8 through a clamping ring 2, the clamping ring 2 is pushed to the side far away from the brake disc 9 by a positioning spring 4, and the positioning spring 4 is arranged on the brake caliper body 8. There is great frictional force between the contact surface of snap ring 2 and outer piston 5, and when the displacement of outer piston 5 is in the elastic deformation scope of positioning spring 4, there is not relative motion between the contact surface of snap ring 2 and outer piston 5. The other end of the outer piston 5 is provided with an inclined plane, the inclined plane is matched with a wedge block 11 which is also provided with an inclined plane to form a contact curved surface, the contact curved surface of the wedge block 11 and the outer piston 5 is provided with a groove, the groove is internally provided with a roller 3 and an actuating spring 1, the depth of the groove along the contact curved surface is different, the maximum depth is larger than the diameter of the roller 3, the minimum depth is smaller than the diameter of the roller 3, and the actuating spring 1 pushes the roller 3 to the side with small depth. The other side of the wedge 11 is mounted with the same contact curved surface in cooperation with the inner piston 6, and the inner piston 6 is mounted on the caliper body 8 and connected with the actuating device of the brake.
When the brake works, the actuating device drives the inner piston 6 to move and compress the wedge block 11 and the outer piston 5, meanwhile, the brake caliper body 8 is pushed to move rightwards, the friction plates 10 compress the brake disc 9 from two sides, when the friction plates 10 are contacted with the brake disc 9 to generate friction force, the friction force is upward at the moment, the movement trend between the outer piston 5 and the wedge block 11 enables the roller 3 to generate upward movement trend, namely to move towards the shallow end of the groove, so that the roller 3 is clamped in the groove, the outer piston 5 and the wedge block 11 are integrated and move upwards together, the wedge block 11 and the contact curved surface of the inner piston 6 move towards the deep end of the groove, and the relative movement trend enables the roller 3 and the wedge block 11 to move upwards along the contact curved surface of the inner piston 6 together, so that the self-boosting braking effect is realized; assuming that the friction force is downward at this time, the movement trend between the contact curved surfaces of the wedge block 11 and the inner piston 6 causes the roller 3 to be clamped in the groove, the wedge block 11 and the inner piston 6 are tightly contacted into a whole, the roller 3 moves to the deep end of the groove between the contact curved surfaces of the outer piston 5 and the wedge block 11, and the outer piston 5 moves downward along the contact curved surface of the wedge block 11, so that the self-boosting braking effect is realized.
The actuating device pushes the brake caliper body 8 to move rightward, the outer piston 5 moves leftward, and when the maximum braking strength is reached, the outer piston 5 is not contacted with the mounting hole. At this time, the snap ring 2 and the outer piston 5 move together, the positioning spring 4 is elastically deformed, elastic potential energy is stored, and no relative movement exists between contact surfaces of the snap ring 2 and the outer piston 5. When the brake is released, the actuating device drives the brake caliper body 8 and the inner piston 6 to move reversely, so that the elastic potential energy stored by the positioning spring 4 is released, the outer piston 5 and the brake caliper body 8 move relatively, and all elements are restored to the initial positions.
When the friction plate 10 is worn and the thickness is thinned and the brake works, the actuating device pushes the outer piston 5 and the brake caliper body 8 to move relatively, and when the elastic deformation of the positioning spring 4 reaches the maximum, the actuating device drives the outer piston 5 and the brake caliper body 8 to move relatively continuously due to the fact that the friction plate 10 is worn and the braking effect is poor, so that the positioning spring 4 keeps the maximum elastic deformation, the outer piston 5 overcomes the friction force between the outer piston and the clamping ring 2 and is matched with a new contact surface, namely the displacement of the outer piston 5 relative to the brake caliper body 8 is larger than the maximum elastic deformation of the positioning spring 4. When the braking is released, the elastic potential energy of the positioning spring 4 is released, so that the outer piston 5 and the brake caliper body 8 relatively move, at the moment, the clamping ring 2 and the outer piston 5 are matched and positioned by a new contact surface, after the elastic potential energy of the positioning spring 4 is completely released, the relative position of the outer piston 5 and the brake caliper body 8 is kept unchanged, the actuating device drives the brake caliper body 8 and the inner piston 6 to continuously move so as to restore to the initial position, at the moment, the distance between the inner piston 6 and the outer piston 5 is increased, a gap is formed between the wedge block 11 and the contact curved surface of the inner piston 6/the outer piston 5, the spring 7 pushes the wedge block 11 to move upwards, and the tight fit between the wedge block 11 and the contact curved surface of the inner piston 6/the outer piston 5 is kept, so that the gap compensation is realized. At this time, the return displacement of the outer piston 5 and the caliper body 8 is still the maximum elastic deformation of the positioning spring 4, so that the same braking gap as before abrasion is maintained, and automatic adjustment of the braking gap is realized.
Fig. 3 is a partial schematic view of the outer piston 5, wedge 11 and inner piston 6 portions of the third embodiment. In the third embodiment, the position adjustment of the wedge-shaped block 11 is realized by gravity, the grooves on the contact curved surface are arranged in the outer piston 5 and the inner piston 6, the friction block 13 and the retainer 14 are arranged in the grooves, the friction block 13 has a large diameter C and a small diameter D, the retainer 14 enables the friction block 13 to work in the grooves with the large diameter C as much as possible, and the depth of the grooves is larger than the small diameter D and smaller than the large diameter C. When the outer piston 5 moves upwards relative to the wedge block 11, the friction force on the contact curved surface enables the friction block 13 to work in the groove with the small diameter D and can move; when the outer piston 5 moves downwards relative to the wedge 11, the friction on the contact curved surface makes the friction block 13 work in the groove with a large diameter C, and cannot move, and the inner piston 6 is the same. Therefore, the third embodiment can realize the substantially same working procedure as the second embodiment, and can also realize the self-boosting braking effect, the automatic compensation of the braking gap when the inner piston 6 is always returned to the original position, and the like.
The contact curved surface can be arranged independently or asymmetrically, the friction plate in the embodiment can be only one piece, the brake caliper body can keep the position still, the elastic positioning device can also adopt other structures besides a sealing ring and a spring/clamping ring to realize similar functions, obviously, the described embodiment is only a part of embodiments of the invention, but not all embodiments, and all other embodiments obtained by a person skilled in the art without creative labor are all within the protection scope of the invention based on the embodiments of the invention.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is also within the scope of the invention, as long as various modifications of the method concept and technical solution of the invention are adopted, or the invention is directly applied to other occasions without modifications.
Claims (7)
1. The brake-by-wire device comprises a brake caliper body, two friction plates, a brake disc and an actuating device, wherein the two friction plates are symmetrically arranged on two sides of the brake disc, and one friction plate is arranged on the brake caliper body; the method is characterized in that: the device also comprises a wedge block, an outer piston and an inner piston; the outer piston is arranged in the brake caliper body in a clearance fit manner, one end of the outer piston is provided with the friction plate, and the other end of the outer piston comprises a curved surface structure with a certain curvature; the inner piston is arranged in the brake caliper body, one end of the inner piston is connected with the actuating device of the brake, and the other end of the inner piston comprises a curved surface structure with a certain curvature; the wedge-shaped block is arranged between the outer piston and the inner piston, and two ends of the wedge-shaped block are respectively provided with curved surface structures matched with the outer piston and the inner piston and are respectively contacted and matched with each other to form a contact curved surface; the contact curved surface comprises a curved surface part formed by combining a group A curved surface and a group B curved surface.
2. The brake-by-wire device comprises a brake caliper body, two friction plates, a brake disc and an actuating device, wherein the two friction plates are symmetrically arranged on two sides of the brake disc, and one friction plate is arranged on the brake caliper body; the method is characterized in that: the device also comprises a wedge block, an outer piston, an inner piston, a roller and an actuating element; the outer piston is arranged in the brake caliper body in a clearance fit manner, one end of the outer piston is provided with the friction plate, and the other end of the outer piston comprises a curved surface structure with a certain curvature; the inner piston is arranged in the brake caliper body, one end of the inner piston is connected with the actuating device of the brake, and the other end of the inner piston comprises a curved surface structure with a certain curvature; the wedge-shaped block is arranged between the outer piston and the inner piston, and two ends of the wedge-shaped block are respectively provided with curved surface structures matched with the outer piston and the inner piston and are respectively contacted and matched with each other to form a contact curved surface; the wedge-shaped block is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depths of the groove along the contact curved surface are different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth; or the outer piston is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depths of the groove along the contact curved surface are different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth; or the inner piston is provided with a groove on the contact curved surface, the groove is internally provided with the roller and the actuating element, the depth of the groove along the contact curved surface is different, the maximum depth is larger than the diameter of the roller, the minimum depth is smaller than the diameter of the roller, and the actuating element pushes the roller to the direction with the minimum depth.
3. The brake-by-wire device comprises a brake caliper body, two friction plates, a brake disc and an actuating device, wherein the two friction plates are symmetrically arranged on two sides of the brake disc, and one friction plate is arranged on the brake caliper body; the method is characterized in that: the device also comprises a wedge block, an outer piston, an inner piston, a retainer and a friction block; the outer piston is arranged in the brake caliper body in a clearance fit manner, one end of the outer piston is provided with the friction plate, and the other end of the outer piston comprises a curved surface structure with a certain curvature; the inner piston is arranged in the brake caliper body, one end of the inner piston is connected with the actuating device of the brake, and the other end of the inner piston comprises a curved surface structure with a certain curvature; the wedge-shaped block is arranged between the outer piston and the inner piston, and two ends of the wedge-shaped block are respectively provided with curved surface structures matched with the outer piston and the inner piston and are respectively contacted and matched with each other to form a contact curved surface; the wedge-shaped block is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter; or the outer piston is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter; or the inner piston is provided with a groove on the contact curved surface, the friction block and the retainer are arranged in the groove, the friction block is provided with a large diameter and a small diameter, the depth of the groove is larger than the small diameter of the friction block and smaller than the large diameter of the friction block, and the retainer enables the friction block to work in the groove in a large diameter.
4. A brake-by-wire as claimed in claim 1 or 2 or 3, wherein: the device also comprises an elastic positioning device; one part of the elastic positioning device is fixedly arranged on the brake caliper body, the other part of the elastic positioning device and the outer piston have friction force, and when the outer piston and the brake caliper body have relative displacement, elastic potential energy is generated in the elastic positioning device due to the friction force.
5. A brake-by-wire as claimed in claim 1 or 2 or 3, wherein: the contact curved surface adopts one of inclined surface/arc surface/hyperbolic surface/parabolic surface or the combination of the above curved surfaces.
6. A brake-by-wire as claimed in claim 1 or 2 or 3, wherein: the wedge block is arranged between the outer piston and the inner piston and can be self-locked, namely, the pressing force along the directions of the outer piston and the inner piston can not move the wedge block relative to the outer piston or the inner piston.
7. A brake-by-wire as claimed in claim 1 or 2 or 3, wherein: the contact curved surfaces on two sides of the wedge-shaped block are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210222130.4A CN114483822B (en) | 2022-03-09 | 2022-03-09 | Linear control actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210222130.4A CN114483822B (en) | 2022-03-09 | 2022-03-09 | Linear control actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114483822A CN114483822A (en) | 2022-05-13 |
| CN114483822B true CN114483822B (en) | 2023-06-30 |
Family
ID=81487108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210222130.4A Active CN114483822B (en) | 2022-03-09 | 2022-03-09 | Linear control actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114483822B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810879B (en) * | 2022-06-08 | 2023-07-18 | 浙江师范大学 | Combined type wire control actuator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1555224A1 (en) * | 1967-02-27 | 1972-03-23 | Perrot Bremse Gmbh Deutsche | Inner jaw brake with ball bearing mounted expanding wedge |
| DE10149695A1 (en) * | 2001-10-09 | 2003-04-24 | Estop Gmbh | Method for automatically enhancing performance of vehicle disc brake has one friction pad seating in V-shaped recess in caliper |
| CN101876357A (en) * | 2009-05-01 | 2010-11-03 | 陈坤 | Self-energizing effort disk brake |
| CN102562871A (en) * | 2012-02-24 | 2012-07-11 | 吉林大学 | Method for designing wedge-shaped self-servo disc brake |
| CN110425236A (en) * | 2019-07-27 | 2019-11-08 | 浙江师范大学 | A kind of self energizing effort brake-by-wire device |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB926481A (en) * | 1958-09-30 | 1963-05-22 | Dunlop Rubber Co | Improvements in disc brakes |
| CH378177A (en) * | 1960-06-24 | 1964-05-31 | Magneti Marelli Spa | Fluid control device under pressure of the expansion brakes |
| DE1201629B (en) * | 1961-07-03 | 1965-09-23 | Licentia Gmbh | Automatic, mechanical adjustment device for a friction brake, especially a disc brake |
| US3187849A (en) * | 1963-09-12 | 1965-06-08 | Eaton Mfg Co | Wheel brake operating assembly |
| FR1478442A (en) * | 1966-02-16 | 1967-04-28 | Messier Fa | Mechanical disc brake control device, with automatic wear compensation |
| GB1299795A (en) * | 1970-03-20 | 1972-12-13 | Barkas Werke Veb | Improvements in or relating to disc brake assemblies for motor vehicles |
| US3997035A (en) * | 1975-09-02 | 1976-12-14 | Borg-Warner Corporation | Automatic slack adjuster for vehicle brakes |
| CA1204393A (en) * | 1982-09-27 | 1986-05-13 | Rockwell International Corporation | Wedge brake cage and roller assembly |
| SE519618C2 (en) * | 2001-07-13 | 2003-03-18 | Volvo Lastvagnar Ab | Disc brake for land vehicles |
| DE10347792A1 (en) * | 2003-10-14 | 2005-05-12 | Bosch Gmbh Robert | wheel brake |
| JP2005214286A (en) * | 2004-01-29 | 2005-08-11 | Hitachi Ltd | Disc brake |
| EP1798123B1 (en) * | 2005-12-14 | 2008-09-03 | Fondazione Torino Wireless | Electromechanical actuating device for a wheel brake system of a motor vehicle and a brake system equipped with such an actuating device |
| KR100879890B1 (en) * | 2007-06-25 | 2009-01-22 | 현대모비스 주식회사 | Additional functions embodiment using solenoid typed Single Motor Electric Wedge Brake Sysrem |
| CN102996684B (en) * | 2011-09-13 | 2017-02-08 | 陈坤 | High-reinforcement disk brake |
| CN203023356U (en) * | 2012-12-20 | 2013-06-26 | 杭州汇丰车桥有限公司 | Brake |
| CN203362903U (en) * | 2013-07-16 | 2013-12-25 | 吉林大学 | Wedge automobile braking device based on driving of proportional electromagnet |
| JP6599806B2 (en) * | 2015-08-06 | 2019-10-30 | 曙ブレーキ工業株式会社 | Wedge cam brake |
| CN107035790A (en) * | 2016-12-19 | 2017-08-11 | 金华职业技术学院 | A kind of self-boosting type automobile electromechanical brake |
| DE102017108161B3 (en) * | 2017-04-18 | 2018-08-02 | Saf-Holland Gmbh | Spreizkeileinheit |
| CN107448520B (en) * | 2017-09-26 | 2019-03-22 | 浙江师范大学 | A kind of electric mechanical brake-by-wire device |
| CN108591306B (en) * | 2017-12-29 | 2020-08-04 | 浙江师范大学 | Electronic mechanical brake-by-wire |
| CN210327271U (en) * | 2019-07-26 | 2020-04-14 | 谢祥洲 | Motor brake device |
| CN110486394B (en) * | 2019-07-27 | 2021-01-15 | 浙江师范大学 | Self-energizing wire control actuator |
| CN110425237B (en) * | 2019-07-27 | 2021-01-15 | 浙江师范大学 | Wedge block assembly for brake |
-
2022
- 2022-03-09 CN CN202210222130.4A patent/CN114483822B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1555224A1 (en) * | 1967-02-27 | 1972-03-23 | Perrot Bremse Gmbh Deutsche | Inner jaw brake with ball bearing mounted expanding wedge |
| DE10149695A1 (en) * | 2001-10-09 | 2003-04-24 | Estop Gmbh | Method for automatically enhancing performance of vehicle disc brake has one friction pad seating in V-shaped recess in caliper |
| CN101876357A (en) * | 2009-05-01 | 2010-11-03 | 陈坤 | Self-energizing effort disk brake |
| CN102562871A (en) * | 2012-02-24 | 2012-07-11 | 吉林大学 | Method for designing wedge-shaped self-servo disc brake |
| CN110425236A (en) * | 2019-07-27 | 2019-11-08 | 浙江师范大学 | A kind of self energizing effort brake-by-wire device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114483822A (en) | 2022-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110469600B (en) | Self-energizing wire control actuator | |
| CN110486394B (en) | Self-energizing wire control actuator | |
| CN110425236B (en) | Self-energizing wire control actuator | |
| CN110425237B (en) | Wedge block assembly for brake | |
| CN108591306B (en) | Electronic mechanical brake-by-wire | |
| CN114382802B (en) | Linear control actuator | |
| CN114483822B (en) | Linear control actuator | |
| KR101477650B1 (en) | Electro Mechanical Brake | |
| CN110552979A (en) | Electronic mechanical hydraulic line control brake | |
| CN110469602B (en) | Self-energizing wire control actuator | |
| CN110566603B (en) | Wire control actuator | |
| CN114396439B (en) | Linear control actuator | |
| CN108253042B (en) | Electronic mechanical brake-by-wire | |
| CN110454522B (en) | Self-energizing wire control actuator | |
| CN107420460B (en) | Electronic mechanical brake-by-wire | |
| CN114658772A (en) | Electronic mechanical line control brake with more stable transmission characteristic | |
| JP2003014015A (en) | Electric parking brake | |
| CN108194535B (en) | Electronic mechanical brake-by-wire | |
| CN217234357U (en) | Combined type electron parking braking pincers assembly | |
| CN107588126B (en) | Electronic mechanical wire control actuator | |
| CN110541898A (en) | Electronic mechanical hydraulic line control brake | |
| CN110486392B (en) | Self-energizing wire control actuator | |
| CN108317186B (en) | Electronic mechanical brake-by-wire | |
| CN110486393B (en) | Self-energizing wire control actuator | |
| CN110578760A (en) | Electronic mechanical hydraulic line control brake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |