CN114483822A - Wire control actuator - Google Patents
Wire control actuator Download PDFInfo
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- CN114483822A CN114483822A CN202210222130.4A CN202210222130A CN114483822A CN 114483822 A CN114483822 A CN 114483822A CN 202210222130 A CN202210222130 A CN 202210222130A CN 114483822 A CN114483822 A CN 114483822A
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- outer piston
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a linear control actuator, which comprises a wedge-shaped 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-shaped block, the inner piston and the outer piston are relatively positioned through the wedge-shaped block, the outer piston is pushed to move, the friction plate is pressed, and the efficient braking effect is achieved. The invention has simple structure, reliable work and high braking efficiency, can automatically adjust the braking clearance, 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-controlled mechanical brake which can replace the existing disc hydraulic brake, realize that friction plates clamp a brake disc from two sides by the same pressure in an electric control mechanical mode, realize adjustable brake clearance and adjustable brake strength, and particularly relates to a wire-controlled brake.
Background
The brake-by-wire technology is a novel brake technology appearing in recent years, a control system receives information of a sensor to control an actuating motor to work without mechanical or hydraulic connection between a brake and a brake pedal, 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 beneficial to optimizing the braking performance of the whole vehicle, and can be conveniently integrated with other electronic control systems such as ABS, ASR, ESP and the like, so that the system has wide development space.
The currently developed brake-by-wire systems mainly include an electrohydraulic brake system (EHB) and an electromechanical brake system (EMB). An electronic mechanical brake system (EMB) realizes a braking process by driving a mechanical mechanism through a motor, eliminates a hydraulic component, greatly simplifies the structure of the brake system and enables the brake to be easier to arrange, assemble and overhaul. However, the conventional electromechanical braking system often lacks a function of automatically adjusting the braking clearance at the brake part, so that the problems of unstable operation, variable working efficiency and the like of the brake are caused under the conditions of external environment change and friction plate abrasion of the brake, and certain difficulty is brought to the control of the braking efficiency. Meanwhile, most brakes have the problems of complex structure, large installation size and the like.
Most of the current electromechanical brakes are designed based on disc brakes, and a wedge mechanism is introduced into the electromechanical brakes to generate a self-boosting effect, so that a larger braking efficiency is obtained through a smaller motor driving force. While the wedge mechanism is adopted to realize self-reinforcement, the working characteristics of the actuating part of the brake are different under the condition of different friction plate thicknesses due to the influence of the wedge mechanism, so that the difficulty is brought to the control of the braking efficiency 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 work and the like, can realize the automatic adjustment of the brake clearance, simultaneously, the wedge-shaped block is arranged between the outer piston and the inner piston, so that the clearance adjustment function is completely realized by the piston part, and the working characteristic of the brake actuating part is kept stable while the self-energizing braking effect is realized.
The technical scheme for realizing the purpose of the invention is as follows:
a wire control brake 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 piston also comprises a wedge-shaped block, an outer piston and an inner piston; the outer piston is arranged in the brake caliper body in a clearance fit mode, 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 a curved surface structure matched with the outer piston and the inner piston and are respectively in contact fit 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 exists between the other part of the elastic positioning device and the outer piston, and when the outer piston and the brake caliper body are displaced relatively, elastic potential energy is generated in the elastic positioning device due to the action of the friction force.
Further comprising a roller, an actuation element; said wedge having a groove in said curved contact surface, said groove having said roller and said actuating element disposed therein, said groove having different depths along said curved contact surface, a maximum depth greater than said roller diameter and a minimum depth less than said roller diameter, said actuating element urging said roller in a direction of minimum depth; or said outer piston has a groove in said contact surface, said groove housing said roller and said actuating element, said groove varying in depth along the contact surface, a maximum depth greater than said roller diameter and a minimum depth less than said roller diameter, said actuating element urging said roller in a direction of minimum depth; or the inner piston is provided with a groove on the contact curved surface, the roller and the actuating element are arranged in the groove, the depth of the groove is different along the contact curved surface, 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 has a large diameter and a small diameter, the depth of the groove is greater 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 the 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 has a large diameter and a small diameter, the depth of the groove is greater 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 the 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 has a large diameter and a small diameter, the depth of the groove is greater 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 the large diameter.
The contact curved surface adopts one of an inclined surface, a circular arc surface, a hyperbolic surface and a parabolic surface or the combination of the curved surfaces.
The wedge block is arranged between the outer piston and the inner piston and can be self-locked, namely the wedge block cannot move relative to the outer piston or the inner piston by pressing force along the directions of the outer piston and the inner piston.
The contact curved surfaces on the two sides of the wedge-shaped block are symmetrically arranged.
The technical scheme of the invention at least has the following advantages:
the clearance generated by the abrasion of the friction plate of the brake is automatically compensated through the change of the shape and the position of the wedge-shaped block.
Through the function of the contact curved surfaces on the two sides of the wedge-shaped block, the self-energizing braking effect of the brake can be realized when the brake disc rotates in the positive and negative 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 without being influenced by the thickness of the friction plate, and the mechanical design, power selection and the like of the actuating device part are more free.
The brake has the advantages of high response speed and high reliability, is completely composed of mature mechanical mechanisms, and all the mechanical mechanisms are always in contact with each other, so that the clearance of the brake only exists between the brake disc and the friction plate, the rigidity of the inner piston, the rigidity of the outer piston and the rigidity of the wedge block are high, the deformation in the working process is small, and the time consumption caused by factors such as the elimination of the internal clearance and the deformation of elements is reduced.
Drawings
FIG. 1 is a front view of a first embodiment of a wire control actuator of the present invention.
Fig. 2 is a front view of a second embodiment of a wire actuator according to the present invention.
Fig. 3 is a partial schematic view of a third embodiment of a wire control actuator of the present invention.
The description is marked in the drawings: the brake caliper comprises the following components, by weight, 1-an actuating spring 2-a snap ring 3-a roller 4-a positioning spring 5-an outer piston 6-an inner piston 7-a spring 8-a brake caliper body 9-a brake disc 10-a friction plate 11-a wedge block 12-a sealing ring 13-a friction block 14-a retainer A-a group of curved surfaces B-a group of curved surfaces C-a friction block large diameter D-a 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 actuator comprises a caliper body 8, a brake disc 9 is provided in a jaw of the caliper body 8, friction plates 10 are provided on both sides of the brake disc 9, one is mounted on the caliper body 8, the other is mounted on an outer piston 5, the outer piston 5 is mounted on the caliper body 8 through a seal ring 12, a large frictional force is provided between the seal ring 12 and a contact surface of the outer piston 5, and when a displacement of the outer piston 5 is within an elastic deformation range of the seal ring 12, there is no relative movement between the seal ring 12 and the contact surface of the outer piston 5. The other end of the outer piston 5 is a contact curved surface formed by combining an A group of curved surfaces and a B group of curved surfaces, the contact curved surface is matched and installed with a wedge-shaped block 11 which is also formed by combining the A group of curved surfaces and the B group of curved surfaces, the other side of the wedge-shaped block 11 is matched and installed with the inner piston 6 by the same contact curved surface, and the inner piston 6 is installed on the brake caliper body 8 and is connected with an actuating device of the brake.
When the brake works, the actuating device drives the inner piston 6 to move leftwards, the wedge-shaped block 11 is pressed through the contact curved surface, the wedge-shaped block 11 presses the outer piston 5 through the contact curved surface, the curved surfaces of the group A and the group B are simultaneously and tightly contacted, at the moment, the actuating device simultaneously pushes the brake caliper body 8 to move rightwards, i.e. the outer piston 5 and the caliper body 8, move in opposite directions, causing the friction plates 10 to press the brake discs 9 from both sides, when the friction plate 10 is brought into contact with the disc 9, a frictional force is generated, assuming that the frictional force is upward at this time, the outer piston 5 moves upwards along the direction of friction force, the outer piston 5 and the wedge block 11 move upwards together through the close contact of the group A curved surfaces in the contact curved surfaces of the outer piston 5 and the wedge block 11, and the group A curved surfaces are separated and move relatively along the group B curved surfaces in the contact curved surfaces of the wedge block 11 and the inner piston 6, so that the self-boosting braking effect is realized; if the friction force is downward, the wedge block 11 and the contact curved surface of the inner piston 6 are in close contact with each other through the group A curved surfaces, the group A curved surfaces are separated between the contact curved surfaces of the outer piston 5 and the wedge block 11, and the group A curved surfaces move relatively along the group B curved surfaces, so that the self-energizing braking effect is realized.
The actuating device pushes the brake caliper body 8 to move rightwards, the outer piston 5 moves leftwards, 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 to store elastic potential energy, and there is no relative movement 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 in the sealing ring 12 is released, the outer piston 5 and the brake caliper body 8 move relatively, and all the elements recover the initial positions.
When the friction plate 10 is worn and the thickness is reduced, 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 wear of the friction plate 10, and at the moment, the actuating device drives the outer piston 5 and the brake caliper body 8 to continue to move relatively, so that the sealing ring 12 keeps the maximum elastic deformation, the outer piston 5 overcomes the friction force between the outer piston and 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 greater 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 positioned in a matched mode through 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 still, the actuating device drives the brake caliper body 8 and the inner piston 6 to continuously 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 is formed between the wedge-shaped block 11 and the contact curved surface of the inner piston 6/the outer piston 5, when the gap reaches a certain value, the wedge-shaped block 11 falls down by an adjusting unit under the action of gravity, the curved surface A is in contact with the adjacent curved surface A below to form a new group A curved surface, similarly, the curved surface B also forms a new group B curved surface with the adjacent curved surface B below, and the wedge-shaped characteristic of the wedge-shaped block is utilized, and realizing clearance compensation. 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 brake clearance is kept the same as that before abrasion, and automatic adjustment of the brake clearance 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 elastic positioning devices are adopted, the sealing ring 12 is adopted in the attached drawing 1 to realize the elastic positioning function, and the elastic potential energy is stored by utilizing the elastic deformation of the sealing ring 12; in the attached drawing 2, the positioning spring 4 and the snap ring 2 are adopted to realize the elastic positioning function, and the positioning spring 4 is utilized to generate elastic deformation to store elastic potential energy.
The wedge-shaped blocks have different moving power, the wedge-shaped blocks 11 move towards the wedge-shaped direction by utilizing the self gravity of the wedge-shaped blocks 11 in the attached drawing 1, and the wedge-shaped blocks 11 move towards the wedge-shaped direction by the springs 7 in the attached drawing 2.
The contact curved surfaces are different, the contact curved surface in the attached figure 1 is formed by combining two groups of curved surfaces, and the contact curved surface in the attached figure 2 can be a single inclined plane, a parabolic surface, a hyperbolic surface and the like.
The limiting modes of the contact curved surfaces are different, in the attached drawing, a group of curved surfaces in the contact curved surfaces are utilized to realize the relative fixation of the wedge block 11 and the inner piston 6 or the outer piston 5, in the attached drawing, the groove characteristics on the contact curved surfaces, the roller 3 installed in the groove and the actuating spring 1 are utilized to realize 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 a caliper body 8, friction plates 10 are arranged on two sides of the brake disc 9, one is arranged on the caliper body 8, the other is arranged on an outer piston 5, the outer piston 5 is arranged on the caliper body 8 through a clamping ring 2, the clamping ring 2 is pushed to one side far away from the brake disc 9 by a positioning spring 4, and the positioning spring 4 is arranged on the caliper body 8. There is a large frictional force between the contact surfaces of the snap ring 2 and the outer piston 5, and when the displacement of the outer piston 5 is within the elastic deformation range of the positioning spring 4, there is no relative movement between the contact surfaces of the snap ring 2 and the outer piston 5. The other end of the outer piston 5 is provided with an inclined surface, the inclined surface is matched with a wedge block 11 with the same inclined surface to form a contact curved surface, a groove is formed in the contact curved surface of the wedge block 11 and the outer piston 5, a roller 3 and an actuating spring 1 are arranged in the groove, 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 one side with small depth. The other side of the wedge block 11 is matched and installed with the inner piston 6 by the same contact curved surface, and the inner piston 6 is installed on the brake caliper body 8 and connected with an actuating device of the brake.
When the brake works, the actuating device drives the inner piston 6 to move the pressing wedge block 11 and the outer piston 5, meanwhile, the brake caliper body 8 is pushed to move rightwards, 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, if 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 an upward movement trend, namely to move towards the shallow end of the groove, therefore, the roller 3 is clamped in the groove, the outer piston 5 and the wedge block 11 are integrated to move upwards together, the wedge block 11 and the inner piston 6 are contacted on a curved surface, the relative movement trend enables the roller 3 to move towards the deep end of the groove, and therefore, the outer piston 5 and the wedge block 11 move upwards along the contacted curved surface of the inner piston 6 together, and the self-energizing brake effect is achieved; if the friction force is downward, the roller 3 is stuck in the groove by the movement trend between the wedge block 11 and the contact curved surface of the inner piston 6, the wedge block 11 and the inner piston 6 are tightly contacted into a whole, the roller 3 moves towards 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-energizing braking effect is realized.
The actuating device pushes the brake caliper body 8 to move rightwards, the outer piston 5 moves leftwards, 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 to store elastic potential energy, and no relative motion exists between the 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 in the positioning spring 4 is released, the outer piston 5 and the brake caliper body 8 move relatively, and all elements recover to the initial positions.
When the friction plate 10 is worn and the thickness is reduced, 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 braking effect is poor due to the wear of the friction plate 10, and the actuating device drives the outer piston 5 and the brake caliper body 8 to continue to move relatively, 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 snap 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 brake 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 move relatively, at the moment, the snap ring 2 and the outer piston 5 are positioned in a matched mode through a new contact surface, after the elastic potential energy of the positioning spring 4 is completely released, the relative positions of the outer piston 5 and the brake caliper body 8 are kept still, the actuating device drives the brake caliper body 8 and the inner piston 6 to move continuously 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 is formed between the wedge block 11 and a contact curved surface of the inner piston 6/the outer piston 5, the spring 7 pushes the wedge block 11 to move upwards, the tight fit between the wedge block 11 and the contact curved surface of the inner piston 6/the outer piston 5 is kept, and the gap compensation is achieved. 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 brake clearance is kept the same as that before abrasion, and the automatic adjustment of the brake clearance is realized.
Fig. 3 is a partial schematic view of the outer piston 5, the wedge block 11 and the inner piston 6 in the third embodiment. In the third embodiment, the position adjustment of the wedge 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 greater than the small diameter D and less 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 move; when the outer piston 5 moves downwards relative to the wedge 11, the friction force on the contact curved surface causes the friction block 13 to work in the groove with the large diameter C and cannot move, and the inner piston 6 is the same. Therefore, the third embodiment can realize basically the same working process as the second embodiment, and can also realize the self-energizing braking effect, the automatic compensation of the braking clearance when the inner piston 6 is always returned to the original position, and the like.
The curved contact surfaces may be separately or asymmetrically arranged, the friction plates in the embodiment may have only one friction plate, the caliper body may also keep the position still, the elastic positioning device may also adopt other structures besides the sealing ring and the spring/snap ring to achieve similar functions, it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not the whole embodiment, and based on the embodiment of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention.
The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and changes are intended to be included within the scope of the invention.
Claims (7)
1. A wire control brake 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 piston also comprises a wedge-shaped block, an outer piston and an inner piston; the outer piston is arranged in the brake caliper body in a clearance fit mode, 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 a curved surface structure matched with the outer piston and the inner piston and are respectively in contact fit to form a contact curved surface.
2. A wire control actuator as defined in claim 1, wherein: the device also comprises an elastic positioning device; one part of the elastic positioning device is fixedly arranged on the brake caliper body, and the other part of the elastic positioning device has larger friction force with the outer piston.
3. A wire control actuator as defined in claim 1, wherein: further comprising a roller, an actuation element; said wedge having a groove in said curved contact surface, said groove having said roller and said actuating element disposed therein, said groove having different depths along said curved contact surface, a maximum depth greater than said roller diameter and a minimum depth less than said roller diameter, said actuating element urging said roller in a direction of minimum depth; or said outer piston has a groove in said contact surface, said groove housing said roller and said actuating element, said groove varying in depth along the contact surface, a maximum depth greater than said roller diameter and a minimum depth less than said roller diameter, said actuating element urging said roller in a direction of minimum depth; or the inner piston is provided with a groove on the contact curved surface, the roller and the actuating element are arranged in the groove, the depth of the groove is different along the contact curved surface, 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.
4. A wire control actuator as defined in claim 1, wherein: 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 has a large diameter and a small diameter, the depth of the groove is greater 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 the 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 has a large diameter and a small diameter, the depth of the groove is greater 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 with the 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 has a large diameter and a small diameter, the depth of the groove is greater 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 the large diameter.
5. A wire actuator as defined in claim 1, wherein: the contact curved surface adopts one of an inclined surface, a circular arc surface, a hyperbolic surface and a parabolic surface or the combination of the curved surfaces.
6. A wire control actuator as defined in claim 1, wherein: the wedge block is arranged between the outer piston and the inner piston and can be self-locked, namely the wedge block cannot move relative to the outer piston or the inner piston by pressing force along the directions of the outer piston and the inner piston.
7. A wire control actuator as defined in claim 1, wherein: the contact curved surfaces on the 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 |
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| Publication Number | Publication Date |
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| CN114483822A true CN114483822A (en) | 2022-05-13 |
| CN114483822B CN114483822B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210222130.4A Active CN114483822B (en) | 2022-03-09 | 2022-03-09 | Linear control actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810879A (en) * | 2022-06-08 | 2022-07-29 | 浙江师范大学 | Composite line control ware |
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| CN114810879A (en) * | 2022-06-08 | 2022-07-29 | 浙江师范大学 | Composite line control ware |
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