Drive-by-wire brake
By introducing an absorption component into the online brake, the axial assembly clearance of the lead screw mechanism is absorbed by elastic and limiting components, which solves the problems of braking instability and component damage caused by lead screw movement, and improves the service life and stability of the product.
Patent Information
- Application Number
- CN202422698761.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-06
AI Technical Summary
The lead screw mechanism of existing wire-controlled brakes has axial assembly clearance, which makes the lead screw prone to movement, resulting in unstable braking, long braking time, damage to parts, and reduced product life.
An absorption component, including an elastic element and a limiting element, is adopted. The elastic preload of the elastic element ensures that the screw mechanism and the support surface of the through hole are fully fitted, absorbing the axial assembly gap. When the axial acceleration is too large, the maximum movement of the screw is limited, preventing the elastic element from being over-compressed.
It effectively reduces axial movement of the lead screw mechanism, avoids braking instability and component damage, and improves product service life. The elastic element has buffer protection and automatic reset function, and the limit element prevents the elastic element from being crushed by excessive force.
Smart Images
Figure CN223498513U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of brake technology, specifically to a brake-by-wire type. Background Technology
[0002] Brakes are essential components for vehicle braking, primarily including hydraulic brakes and brake-by-wire brakes. Brake-by-wire brakes utilize a screw mechanism to drive the braking elements and brake the corresponding brake disc. This screw mechanism is mounted on the caliper of the brake-by-wire system. However, existing brake-by-wire systems typically only use a retaining ring at the shaft end for axial fixation. Due to machining and assembly errors, axial clearances exist after the screw, bearings, pressure sensors, and other components are assembled on the caliper. This allows for axial movement of these components, leading to prolonged braking time, unstable braking, damage to components, and reduced product lifespan. Utility Model Content
[0003] The purpose of this application is to propose a wire-controlled brake that can absorb the axial assembly clearance of the lead screw mechanism, reduce the axial movement of the lead screw mechanism, avoid long braking time, unstable braking, damage to parts, etc., and improve the service life of the product.
[0004] To solve at least one of the above-mentioned technical problems, the technical solution of this application is as follows:
[0005] A wire-controlled brake according to an embodiment of this application includes: a clamp body; a lead screw mechanism; a braking element; and an absorption assembly, the absorption assembly including an elastic element and a limiting element; wherein, the clamp body is provided with a first through hole for accommodating the lead screw mechanism, the braking element is located at one end of the first through hole and cooperates with the nut of the lead screw mechanism, one end of the lead screw mechanism extends out of the other end of the first through hole and is provided with a fixing element, and the end of the first through hole away from the braking element is provided with a first groove that cooperates with the elastic element; the limiting element is used to be sleeved on the lead screw of the lead screw mechanism, the limiting element is located between the elastic element and the fixing element and is located outside the first groove, one end of the elastic element abuts against the bottom surface of the first groove, the other end of the elastic element abuts against one end of the limiting element and extends out of the first groove, the other end of the limiting element abuts against the fixing element, and the outer diameter of the limiting element is larger than the diameter of the first groove.
[0006] In one possible implementation of the above embodiments, the elastic element is a spring sheet.
[0007] In one possible implementation of the above embodiments, the elastic element is a wave spring sheet sleeved on the lead screw of the lead screw mechanism.
[0008] In one possible implementation of the above embodiment, the elastic element is provided with a second through hole for the lead screw of the lead screw mechanism to pass through.
[0009] In one possible implementation of the above embodiments, the elastic element is coaxial with the lead screw of the lead screw mechanism.
[0010] In one possible implementation of the above embodiment, the first through hole is coaxial with the first groove.
[0011] In one possible implementation of the above embodiment, a second groove corresponding to the limiting member is provided at one end of the first groove near the limiting member, and the diameter of the second groove is larger than the outer diameter of the limiting member.
[0012] In one possible implementation of the above embodiment, the second groove is coaxial with the first groove.
[0013] In one possible implementation of the above embodiment, the limiting member is provided with a third through hole for the lead screw of the lead screw mechanism to pass through.
[0014] In one possible implementation of the above embodiments, the limiting member is a flat washer, and the limiting member is coaxial with the lead screw of the lead screw mechanism.
[0015] The above-mentioned technical solution of this application has at least one of the following beneficial effects:
[0016] According to this application, the wire-controlled brake includes a caliper body, a lead screw mechanism, a braking component, and an absorption assembly. The absorption assembly includes an elastic element and a limiting element. The limiting element is sleeved on the lead screw of the lead screw mechanism. The lead screw mechanism is installed in the first through hole of the caliper body of the wire-controlled brake. The limiting element is located between the elastic element and the fixing element and outside the first groove. One end of the elastic element abuts against the bottom surface of the first groove body, and the other end of the elastic element abuts against one end of the limiting element and extends out of the first groove body. The other end of the limiting element abuts against the fixing element. The outer diameter of the limiting element is larger than the diameter of the first groove body. Thus, by utilizing the elastic preload of the elastic element, the axial assembly surfaces of the lead screw mechanism are fully fitted with the corresponding support surfaces in the first through hole, absorbing the axial assembly gap of the lead screw mechanism. When the brake-by-wire generates axial acceleration due to vibration, braking, or other conditions, the elastic element can offset part of the axial assembly gap. When the axial acceleration is too large, the elastic element deforms completely into the first groove, and the limiting element presses against the end face of the first groove, preventing the elastic element from being compressed further and preventing it from being crushed due to excessive force. This not only improves the lifespan of the elastic element but also limits the maximum axial movement of the screw mechanism.
[0017] Therefore, the wire-controlled brake of this application can absorb the axial assembly clearance of the lead screw mechanism through the elastic element, reduce the axial movement of the lead screw mechanism, and avoid long braking time, unstable braking, damage to parts, etc. The elastic element also has the functions of buffer protection and automatic reset. The limiting element can also prevent the elastic element from being crushed by excessive force. This not only improves the life of the elastic element, but also limits the maximum axial movement of the lead screw mechanism, thereby improving the service life of the product.
[0018] In addition, unless otherwise specified in the technical solution of this application, the technical solution can be implemented by conventional means in the field. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of a drive-by-wire brake according to one embodiment of this application;
[0021] Figure 2 This is a partial structural schematic diagram of a brake-by-wire device according to one embodiment of this application;
[0022] Figure 3 This is a partial structural diagram of a brake-by-wire device according to one embodiment of the present application under a state of excessive axial acceleration.
[0023] Figure 4 This is a schematic diagram of the structure of an elastic element according to one embodiment of this application;
[0024] Figure 5 This is a top view of an elastic element according to one embodiment of this application.
[0025] Explanation of the labels in the attached drawings:
[0026] Clamp body 100; First through hole 101; First groove 102; Second groove 103;
[0027] Screw mechanism 200; Screw 201; Nut 202; Fixing component 203;
[0028] Absorption component 300; elastic element 310; second through hole 311; limiting element 320. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only some, not all, of the embodiments of this application, and are used merely to explain this application and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0030] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," "outer," "both ends," "both sides," "bottom," and "top," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," "upper-level," "lower-level," "main," and "secondary," etc., are used for descriptive purposes only and can be simply used to more clearly distinguish different components, and should not be construed as indicating or implying relative importance.
[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0032] See Figures 1-5 As shown, a wire-controlled brake according to an embodiment of this application is schematically illustrated, including a caliper body 100, a lead screw mechanism 200, a braking element (not shown), and an absorption assembly 300, the absorption assembly 300 including an elastic element 310 and a limiting element 320.
[0033] The clamp body 100 is provided with a first through hole 101 for mounting the lead screw mechanism 200. The braking component is located at one end of the first through hole 101 and cooperates with the nut 202 of the lead screw mechanism 200. One end of the lead screw 201 of the lead screw mechanism 200 extends out of the other end of the first through hole 101 and is provided with a fixing component 203. The end of the first through hole 101 away from the braking component is provided with a first groove 102 that cooperates with the elastic component 310. The limiting member 320 is used to be sleeved on the lead screw 201 of the lead screw mechanism 200. The limiting member 320 is located between the elastic member 310 and the fixing member 203 and is located outside the first groove 102. One end of the elastic member 310 abuts against the bottom surface of the first groove 102, and the other end of the elastic member 310 abuts against one end of the limiting member 320 and extends out of the first groove 102. The other end of the limiting member 320 abuts against the fixing member 203. The outer diameter of the limiting member 320 is larger than the diameter of the first groove 102.
[0034] In this embodiment, the lead screw mechanism 200 is installed in the first through hole 101 of the clamp body 100 of the wire-controlled brake. The limiting member 320 is sleeved on the lead screw 201 of the lead screw mechanism 200. The limiting member 320 is located between the elastic member 310 and the fixing member 203 and is located outside the first groove 102. One end of the elastic member 310 abuts against the bottom surface of the first groove 102, and the other end of the elastic member 310 abuts against one end of the limiting member 320 and extends out of the first groove 102. The other end of the limiting member 320 abuts against the fixing member 203. The outer diameter of the limiting member 320 is larger than the diameter of the first groove 102. This allows the elastic preload of the elastic member 310 to ensure that each axial assembly surface of the lead screw mechanism 200 fully engages with the corresponding support surface in the first through hole 101. For example, if the lead screw mechanism 200 is equipped with bearings, pressure sensors, etc., the axial assembly surface of the lead screw 201, the axial end face of the bearing, and the axial end face of the pressure sensor are fully engaged with the corresponding support surface in the first through hole 101, thereby absorbing the axial assembly clearance of the lead screw mechanism 200. When the drive-by-wire brake generates axial acceleration due to vibration, braking, etc., the elastic member 310 can offset a portion of the axial assembly clearance. When the axial acceleration is too large, such as... Figure 3 As shown, the elastic element 310 is fully inserted into the first groove 102 after elastic deformation, and the limiting element 320 presses against the end face of the first groove 102, so that the elastic element 310 cannot be further compressed, preventing the elastic element 310 from being crushed due to excessive force. This not only improves the service life of the elastic element 310, but also limits the maximum axial movement of the screw mechanism 200.
[0035] Therefore, the wire-controlled brake of this application can absorb the axial assembly clearance of the lead screw mechanism 200 through the elastic element 310, reduce the axial movement of the lead screw mechanism 200, and avoid long braking time, unstable braking, damage to parts, etc. The elastic element 310 also has the functions of buffer protection and automatic reset. The limiting element 320 can also prevent the elastic element 310 from being crushed by excessive force, which not only improves the service life of the elastic element 310, but also limits the maximum axial movement of the lead screw mechanism 200, thereby improving the service life of the product.
[0036] In some embodiments, the fixing member 203 may be a snap ring, retaining ring, etc., the braking member includes two symmetrically arranged friction plates, and the lead screw 201 of the lead screw mechanism 200 is driven by a driving member such as a motor. The motor drives the lead screw 201 of the lead screw mechanism 200 to rotate, causing the nut 202 of the lead screw mechanism 200 to move along the drive lead screw 201, and then the nut 202 of the lead screw mechanism 200 drives the braking member to brake the corresponding brake disc. In addition, the clamp body 100 may adopt a fixed structure or a floating structure.
[0037] In some embodiments, the elastic element 310 is a spring sheet. This results in a simple, stable structure and convenient operation. Further, as... Figures 2-5 As shown, the elastic element 310 is a wave spring sheet sleeved on the lead screw 201 of the lead screw mechanism 200. The elastic element 310 is provided with a second through hole 311 for the lead screw 201 of the lead screw mechanism 200 to pass through. One end of the wave spring sheet abuts against the bottom surface of the first groove 102, and the other end of the wave spring sheet abuts against the limiting surface. Therefore, the use of a wave spring sheet in the elastic element 310 results in a more compact and stable structure, which is conducive to better absorbing axial assembly gaps. In addition, the elastic element 310 can also be other suitable elastic elements such as a helical compression spring.
[0038] In some embodiments, such as Figures 2-3 As shown, the elastic element 310 is coaxial with the lead screw 201 of the lead screw mechanism 200, and the first through hole 101 is also coaxial with the first groove 102. This results in more uniform force distribution and facilitates better absorption of axial assembly gaps.
[0039] In some embodiments, such as Figures 2-3 As shown, a second groove 103 corresponding to the limiting member 320 is provided at one end of the first groove 102 near the limiting member 320. The diameter of the second groove 103 is larger than the outer diameter of the limiting member 320. The second groove 103 and the first groove 102 can be coaxial, which makes the force more even.
[0040] When the brake generates axial acceleration due to vibration, braking, or other conditions, and the axial acceleration is excessive, such as Figure 3As shown, the elastic element 310 undergoes complete elastic deformation and enters the first groove 102, while the limiting element 320 presses against the bottom surface of the second groove 103, preventing the elastic element 310 from being further compressed. This prevents the elastic element 310 from being damaged by excessive force, not only improving its lifespan but also limiting the maximum axial movement of the lead screw mechanism 200, resulting in a more compact and stable structure.
[0041] In some embodiments, the limiting member 320 is provided with a third through hole (not shown) for the lead screw 201 of the lead screw mechanism 200 to pass through. The limiting member 320 can be a flat washer, and the limiting member 320 and the lead screw 201 of the lead screw mechanism 200 can be coaxial. As a result, the structure is simpler and more stable, and the operation is more convenient.
[0042] Based on the various embodiments of this application described above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.
[0043] The above descriptions are merely some embodiments of this application, used only to illustrate the technical solutions of this application, and not to limit it. It should be understood that those skilled in the art can make improvements or substitutions based on the above descriptions without departing from the inventive concept of this application, and all such improvements and substitutions should fall within the protection scope of the appended claims. In this case, all details can be replaced with equivalent elements, and the materials, shapes, and sizes can also be arbitrary.
Claims
1. A brake-by-wire device, characterized in that, include: clamp body; Screw mechanism; Braking components; An absorption assembly, the absorption assembly comprising an elastic element and a limiting element; The clamp body is provided with a first through hole for accommodating the lead screw mechanism. The braking element is located at one end of the first through hole and cooperates with the nut of the lead screw mechanism. One end of the lead screw of the lead screw mechanism extends out of the other end of the first through hole and is provided with a fixing element. The end of the first through hole away from the braking element is provided with a first groove that cooperates with the elastic element. The limiting member is used to be sleeved on the lead screw of the lead screw mechanism. The limiting member is located between the elastic member and the fixing member and outside the first groove. One end of the elastic member abuts against the bottom surface of the first groove, and the other end of the elastic member abuts against one end of the limiting member and extends out of the first groove. The other end of the limiting member abuts against the fixing member. The outer diameter of the limiting member is larger than the diameter of the first groove.
2. The brake-by-wire device according to claim 1, characterized in that, The elastic element is a spring sheet.
3. The brake-by-wire device according to claim 2, characterized in that, The elastic element is a wave spring sheet sleeved on the lead screw of the lead screw mechanism.
4. The wire-controlled brake according to claim 3, wherein the elastic element is provided with a second through hole for the lead screw of the lead screw mechanism to pass through.
5. The brake-by-wire device according to claim 4, characterized in that, The elastic element is coaxial with the lead screw of the lead screw mechanism.
6. The brake-by-wire device according to claim 1, characterized in that, The first through hole is coaxial with the first groove.
7. The brake-by-wire device according to claim 6, characterized in that, The first groove has a second groove corresponding to the limiting member at one end near the limiting member, and the diameter of the second groove is larger than the outer diameter of the limiting member.
8. The brake-by-wire device according to claim 7, characterized in that, The second tank is coaxial with the first tank.
9. The brake-by-wire device according to claim 1, characterized in that, The limiting member is provided with a third through hole for the lead screw of the lead screw mechanism to pass through.
10. The brake-by-wire device according to claim 9, characterized in that, The limiting component is a flat washer, and the limiting component is coaxial with the lead screw of the lead screw mechanism.