CN118499390A - Wedge wire control actuator based on giant magnetostriction effect - Google Patents
Wedge wire control actuator based on giant magnetostriction effect Download PDFInfo
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- CN118499390A CN118499390A CN202410633583.5A CN202410633583A CN118499390A CN 118499390 A CN118499390 A CN 118499390A CN 202410633583 A CN202410633583 A CN 202410633583A CN 118499390 A CN118499390 A CN 118499390A
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- friction plate
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- sleeve
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- brake disc
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Abstract
The invention belongs to the technical field of brakes, and discloses a wedge-shaped wire control brake based on a giant magnetostriction effect, which comprises a sleeve, a brake disc and a floating clamp body for clamping the brake disc, wherein the floating clamp body horizontally slides on a fixed track, a first friction plate and a second friction plate are arranged in the floating clamp body, the first friction plate and the second friction plate are oppositely arranged, and the brake disc is arranged between the first friction plate and the second friction plate; one side of the first friction plate, which is close to the floating clamp body, is connected with a sleeve; the sleeve comprises a permanent magnet, a telescopic rod and a wedge block assembly which are sequentially arranged along the axial direction of the sleeve, and one end of the wedge block assembly, which is far away from the telescopic rod, is in contact connection with the friction plate; the telescopic rod is connected with the inner wall surface of the sleeve through a plurality of springs, and the springs are oppositely arranged based on the axis of the telescopic rod; the outer side wall of the telescopic rod is surrounded with a driving coil. The technical scheme of the invention has the advantages of simple structure, light weight, small volume, low energy consumption and convenient control.
Description
Technical Field
The invention belongs to the technical field of brakes, and particularly relates to a wedge wire control brake based on a giant magnetostriction effect.
Background
The giant magnetostrictive effect refers to the phenomenon that certain materials change their dimensions significantly under the action of a magnetic field. Because these materials have a large magnetostriction coefficient, they can provide large displacement and output force while ensuring rapid response efficiency.
A brake is a device that slows, stops, or maintains a stationary state, commonly found in various types of machines, to slow or stop moving parts, commonly referred to as brakes or brakes. The main components of the device comprise a brake frame, a brake piece and an operating mechanism, and sometimes a device for automatically adjusting the gap of the brake piece.
The brake-by-wire is a brake controlled by an electric signal, and is classified into an electro-hydraulic brake (EHB), an electro-mechanical brake (EMB), and an Electronic Wedge Brake (EWB).
The EHB is an improvement from the conventional hydraulic brake, and the electronic system and the hydraulic system are combined by replacing part of the original mechanical elements with electronic elements. An electronic pedal, an Electronic Control Unit (ECU), a hydraulic actuator, and the like constitute the EHB system.
The EMB eliminates the hydraulic system and uses the motor as a power source to drive the brake pads to generate braking force. There is no hydraulic oil pipeline in the whole system, so there is no risk of hydraulic oil leakage, and the structure is simpler.
However, both of the above brakes have their own disadvantages. Hydraulic generation and control in EHB systems is relatively difficult, and hydraulic systems are disadvantageous for lightweight and risk of hydraulic oil leakage. The braking energy source in the EMB system comes from the braking motor completely, so that the output power of the braking motor is required to be large, and the size, the mass and the energy consumption of the braking motor are increased, so that the weight reduction is not facilitated.
Disclosure of Invention
The invention aims to provide a wedge-shaped wire control brake based on a giant magnetostriction effect, which is used for solving the problems in the prior art.
In order to achieve the above purpose, the invention provides a wedge wire brake based on giant magnetostriction effect, which comprises a sleeve, a brake disc and a floating caliper body used for clamping the brake disc, wherein the floating caliper body horizontally slides on a fixed track, a first friction plate and a second friction plate are arranged in the floating caliper body, the first friction plate and the second friction plate are oppositely arranged, and the brake disc is arranged between the first friction plate and the second friction plate; one side of the first friction plate, which is close to the floating clamp body, is connected with a sleeve;
The sleeve comprises a permanent magnet, a telescopic rod and a wedge block assembly which are sequentially arranged along the axial direction of the sleeve, and one end, far away from the telescopic rod, of the wedge block assembly is in contact connection with the friction plate; the telescopic rod is connected with the inner wall surface of the sleeve through a plurality of springs, and the springs are oppositely arranged based on the axis of the telescopic rod; and a driving coil is arranged on the outer side wall of the telescopic rod in a surrounding manner.
Optionally, a screw is installed on the outer side wall of the sleeve, and the screw is connected with any spring in a matching way.
Optionally, the screw employs a pre-tightening force adjusting screw.
Optionally, a gap exists between the brake disc and the first friction plate and between the brake disc and between the brake disc and the second friction plate.
Optionally, the wedge block assembly includes wedge supporting shoe and wedge pushing shoe, telescopic rod, wedge supporting shoe, wedge pushing shoe with first friction disc sets gradually, the wedge supporting shoe with the wedge face of wedge pushing shoe mutually support and set up.
Optionally, the sleeve is a non-magnetic sleeve.
Optionally, the spring is a belleville spring.
Optionally, the telescopic rod is a GMM rod.
The invention has the technical effects that:
The wedge wire control actuator based on the giant magnetostrictive effect provided by the invention uses the giant magnetostrictive effect as a driving source, and controls the brake by controlling the current in the exciting coil. Because the traditional hydraulic drive and motor drive are replaced by giant magnetostrictive drive, the defects of an EHB system and an EMB system are eliminated. The invention has the advantages of simple structure, light weight, small volume, low energy consumption and convenient control, and can meet the market demand while improving the performance of the braking system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 is a schematic diagram of a wedge wire actuator in accordance with an embodiment of the present invention;
FIG. 2 is a force analysis diagram of a brake in an embodiment of the invention;
Description of the reference numerals: 1. a permanent magnet; 2. a belleville spring; 3. a pre-tightening force adjusting screw; 4. a GMM rod; 5. a driving coil; 6. a non-magnetic conductive sleeve; 7. wedge-shaped supporting blocks; 8. wedge-shaped pushing blocks; 9. a first friction plate; 10. a brake disc; 11. a floating clamp body; 12. and a second friction plate.
Detailed Description
In the following, a technical solution in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts are within the scope of protection of the present invention.
In order that the invention may be readily understood, several embodiments of the invention will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown, but in which the invention may be embodied in many different forms and is not limited to the embodiments described herein, but instead is provided to provide a more thorough and complete disclosure of the invention.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only;
as used herein, the terms "comprising," "including," "having," "containing," and the like are open ended terms, meaning including, but not limited to.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in this description of the invention are for the purpose of describing particular embodiments only and are not intended to be limiting of the invention, with the term "and/or" as used herein including any and all combinations of one or more of the associated listed items.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
As shown in fig. 1-2, in this embodiment, a wedge wire brake based on giant magnetostrictive effect is provided, which includes a sleeve, a brake disc 10, and a floating caliper body 11 for clamping the brake disc 10, where the floating caliper body 11 slides horizontally on a fixed track, a first friction plate 9 and a second friction plate 12 are disposed in the floating caliper body 11, the first friction plate 9 and the second friction plate 12 are disposed opposite to each other, and the brake disc 10 is disposed between the first friction plate 9 and the second friction plate 12; a sleeve is connected to one side of the first friction plate 9, which is close to the floating clamp body 11; a gap exists between the brake disc 10 and the first friction plate 9 and the second friction plate 12.
The inside of the sleeve comprises a permanent magnet 1, a telescopic rod and a wedge block assembly which are sequentially arranged along the axial direction of the sleeve, and one end of the wedge block assembly, which is far away from the telescopic rod, is in contact connection with the friction plate 9; the telescopic rod is connected with the inner wall surface of the sleeve through a plurality of springs, and the springs are oppositely arranged based on the axis of the telescopic rod; the outer side wall of the telescopic rod is surrounded by a driving coil 5.
The screw is arranged on the outer side wall of the sleeve, and is connected with any spring in a matching way; the screw adopts a pretightening force to adjust the screw 3.
The utility model discloses a wedge-shaped block assembly, can be implemented, the wedge-shaped block assembly includes wedge supporting piece 7 and wedge pushing piece 8, telescopic rod, wedge supporting piece 7, wedge pushing piece 8 with first friction disc 9 sets gradually, wedge supporting piece 7 with the wedge face of wedge pushing piece 8 mutually supports the setting.
Practically, the sleeve is a non-magnetic sleeve 6; the spring adopts a disc spring 2.
In practice, the telescopic rod is a GMM rod 4.
The GMM rod 4 is used as a driving source to push the wedge block, the generated thrust is amplified through the wedge block structure, and the driving energy consumption is reduced by utilizing the wedge block structure. The embodiment can rapidly respond to braking, and improves the safety and reliability of a braking system.
The device consists of a permanent magnet 1, a disc spring 2, a pre-tightening force adjusting screw 3, a GMM rod 4, a driving coil 5, a non-magnetic sleeve 6, a wedge supporting block 7, a wedge pushing block 8, a friction plate, a brake disc 10 and a floating clamp body 11, wherein the non-magnetic sleeve 6 comprises the permanent magnet 1, the disc spring 2, the GMM rod 4, the driving coil 5, the wedge supporting block 7, the wedge pushing block 8, the friction plate and other components, the permanent magnet 1 is arranged between the non-magnetic sleeve 6 and the GMM rod 4, the permanent magnet 1 is used for providing a necessary bias magnetic field so as to enable the mechanical resonance frequency of the GMM rod 4 to be matched with the frequency of the driving magnetic field, thereby preventing a frequency doubling effect, the disc spring 2 and the pre-tightening force adjusting screw 3 are of a pre-tightening stress structure, the disc spring 2 is applied by the pre-tightening force adjusting screw 3, the GMM rod 4 is prestressed, the GMM rod 4 is stretched under the effect of the magnetic field, the force is transmitted to one side of an output end, and a certain pre-tightening force can enable the GMM rod 4 to be subjected to the output magnetic field in the vertical direction, and the vertical arrangement direction of the GMM rod 4 is enabled to be subjected to the effect of increasing magnetic field, and the output variable is enabled to be increased when the vertical arrangement is enabled to be subjected to the effect. The working principle of the system is that a certain magnetic field is generated when current is applied to the driving coil 5, the GMM rod 4 overcomes the pressure of the disc spring 2 to deform under the action of the magnetic field, the deformation is converted into force generated by mechanical displacement through the wedge pair, the mechanical advantage (self-boosting effect) of the wedge is effectively utilized, finally the amplified force is used for pushing the first friction plate 9 to cling to the brake disc 10, and the caliper body is floating, when the first friction plate 9 is pushed to the brake disc 10, the caliper body slides in the opposite direction, so that the second friction plate 12 clings to the brake disc 10, the first friction plate and the second friction plate exert pressure on the brake disc 10, the automobile brake is realized, the high-efficiency transmission of braking force is ensured in the whole braking process, and excellent braking performance is provided for the automobile.
In this embodiment, the SEPIC circuit is used to provide a driving current for the driving coil 5 of the GMM rod 4, and the SEPIC circuit needs a power supply, and mainly includes the following components: inductance, polyester capacitance, cement resistance, high-capacity electrolytic capacitance, fast recovery diode, induction cooker power tube, etc. The control process of the circuit comprises the following steps: when a braking signal is received, the singlechip outputs PWM signals with different duty ratios through the braking signal intensity output by the electronic brake pedal, the signals control the opening and closing of the photoelectric coupler, and further control the cut-off and the conduction of the power tube, so that the SEPIC circuit is continuously conducted and disconnected, driving currents with different intensities are output, the electromagnetic coil generates exciting magnetic fields with different intensities, the exciting magnetic field enables the GMM rod 4 to output corresponding displacement, the first friction plate 9 is pushed, the braking gap between the first friction plate 9 and the brake disc 10 is eliminated, the brake disc 10 is tightly attached, and the second friction plate 12 is also contacted with the brake disc 10 to be clamped due to the fact that the floating caliper slides in the opposite direction, and finally the automobile braking is realized.
After braking is completed, the brake pedal is released, the magnetic field applied to the magnetostrictive rod (GMM rod) disappears, the GMM rod 4 returns to the original length, the wedge-shaped supporting block 7 returns to the original position along with the GMM rod 4, the wedge-shaped pushing block 8 cannot enable the first friction plate 9 to be tightly attached to the rotating brake disc 10 without supporting the wedge-shaped supporting block 7, at the moment, the contact between the first friction plate 9 and the brake disc 10 is released, the floating caliper body slides to the original position, the contact between the second friction plate 12 and the brake disc 10 is also released, and the brake returns to the non-braking state.
The force balance relationship of the wedge wire control actuator based on the giant magnetostrictive effect in the embodiment is as follows:
FA+FR cosθ-FN＝0 (1)
FB-FR sinθ＝0(2)
FB＝μFN(3)
Wherein μ is a friction coefficient, θ is a wedge angle; the relationship between the axial driving force F A and the braking torque T B can be obtained by the equations (1) - (3) together, as shown in the following equation:
FA＝(1/μ-cotθ)FB (4)
Further, the relationship between the braking torque T B and the axial driving force F A is as follows:
wherein R is the effective radius of the braking force.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (8)
1. The wedge wire control brake based on the giant magnetostriction effect is characterized by comprising a sleeve, a brake disc (10) and a floating clamp body (11) for clamping the brake disc (10), wherein the floating clamp body (11) horizontally slides on a fixed rail, a first friction plate (9) and a second friction plate (12) are arranged in the floating clamp body (11), the first friction plate (9) and the second friction plate (12) are oppositely arranged, and the brake disc (10) is arranged between the first friction plate (9) and the second friction plate (12); one side of the first friction plate (9) close to the floating clamp body (11) is connected with a sleeve;
The inside of the sleeve comprises a permanent magnet (1), a telescopic rod and a wedge block assembly which are sequentially arranged along the axial direction of the sleeve, and one end, far away from the telescopic rod, of the wedge block assembly is in contact connection with the friction plate (9); the telescopic rod is connected with the inner wall surface of the sleeve through a plurality of springs, and the springs are oppositely arranged based on the axis of the telescopic rod; the outer side wall of the telescopic rod is surrounded by a driving coil (5).
2. The wedge wire control actuator based on the giant magnetostrictive effect according to claim 1, wherein a screw is mounted on the outer side wall of the sleeve, and the screw is connected with any spring in a matching way.
3. Wedge wire actuator based on giant magnetostrictive effect according to claim 2, characterized in that the screw employs a pre-tightening force adjusting screw (3).
4. Wedge wire brake actuator based on the giant magnetostrictive effect according to claim 1, characterized in that a gap is present between the brake disc (10) and the first friction plate (9), the second friction plate (12).
5. The wedge wire control actuator based on the giant magnetostrictive effect according to claim 1, wherein the wedge block assembly comprises a wedge supporting block (7) and a wedge pushing block (8), the telescopic rod, the wedge supporting block (7), the wedge pushing block (8) and the first friction plate (9) are sequentially arranged, and wedge faces of the wedge supporting block (7) and the wedge pushing block (8) are mutually matched.
6. Wedge wire actuator based on giant magnetostrictive effect according to claim 1, characterized in that the sleeve is a non-magnetically conductive sleeve (6).
7. Wedge wire actuator based on giant magnetostrictive effect according to claim 1, characterized in that the spring is a belleville spring (2).
8. Wedge wire control actuator based on giant magnetostrictive effect according to claim 1, characterized in that the telescopic rod is a GMM rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410633583.5A CN118499390A (en) | 2024-05-21 | 2024-05-21 | Wedge wire control actuator based on giant magnetostriction effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410633583.5A CN118499390A (en) | 2024-05-21 | 2024-05-21 | Wedge wire control actuator based on giant magnetostriction effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118499390A true CN118499390A (en) | 2024-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410633583.5A Pending CN118499390A (en) | 2024-05-21 | 2024-05-21 | Wedge wire control actuator based on giant magnetostriction effect |
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| Country | Link |
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| CN (1) | CN118499390A (en) |
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- 2024-05-21 CN CN202410633583.5A patent/CN118499390A/en active Pending
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