Electromechanical brake
By employing protrusions, recesses, and retaining ring structures in the electromechanical brake, combined with radial channels and pressure channels, the problem of difficult disassembly of the main braking module and brake caliper module is solved, enabling convenient assembly and disassembly and improving maintenance efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Filing Date
- 2024-12-06
- Publication Date
- 2026-06-09
AI Technical Summary
In existing electromechanical brakes, the main braking module and brake caliper module are difficult to disassemble after assembly, making maintenance and replacement difficult.
The system employs a protruding and recessed structure with a retaining ring. The retaining ring, which unfolds when the first and second grooves are aligned, restricts the axial position of the main braking module and the brake caliper module. Multiple radial channels and pressure channels are used to achieve disassembly, and elastic components and inserts are combined for limiting.
It enables convenient assembly and disassembly between the main braking module and the brake caliper module, facilitating maintenance and replacement, especially for the replacement of the expensive main braking module.
Smart Images
Figure CN122170176A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of braking devices, and more specifically, to an electromechanical brake. Background Technology
[0002] Electromechanical brakes are devices that achieve braking by using a motor to drive the brake caliper. Compared to traditional hydraulic brakes, they offer advantages such as faster response, simpler structure, and easier maintenance. With the increasing electrification and intelligence of vehicles, electromechanical brakes are becoming a development trend in braking systems due to their easier integration with electric control systems.
[0003] Electromechanical brakes generally consist of a main braking module and a brake caliper module. The main braking module includes a brake motor, transmission mechanism, and control unit, while the brake caliper module includes a housing and friction pad support, etc. The main braking module and brake caliper module need to be fixed together when assembled, and are difficult to disassemble after assembly. Summary of the Invention
[0004] The purpose of this application is to solve or at least alleviate one or more problems existing in the prior art.
[0005] According to one aspect, an electromechanical brake is provided, comprising: A main braking module, the main braking module including a protrusion having a first groove; A brake caliper module, the brake caliper module including a recess that mates with a protrusion of the main brake module, the recess having a second groove; and The retaining ring is annular and has a notch; During the assembly of the main braking module and the brake caliper module, the protrusion of the main braking module is inserted axially into the recess of the brake caliper module, the retaining ring is compressed at the first groove to be inserted with the protrusion, and unfolds when the first groove and the second groove are aligned to restrict the relative position of the main braking module and the brake caliper module in the axial direction. The brake caliper module includes multiple channels that extend radially to the second slot.
[0006] The electromechanical brake according to the embodiment enables easy assembly and / or disassembly between the main braking module and the brake caliper module. Attached Figure Description
[0007] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein: Figure 1An exploded view of the electromechanical brake according to an embodiment being assembled to a wheel hub is shown; Figure 2 A perspective view of an electromechanical brake according to an embodiment is shown; Figure 3 An exploded view of an electromechanical brake according to an embodiment is shown; Figure 4 A longitudinal cross-sectional view of an electromechanical brake according to an embodiment is shown; Figure 5 A perspective view of the brake caliper of an electromechanical brake according to an embodiment is shown; Figure 6 A side view of the brake caliper of an electromechanical brake according to an embodiment is shown; Figure 7 It shows Figure 6 A cross-sectional view of section AA in the diagram; Figure 8 A side view of an electromechanical brake according to an embodiment is shown; Figure 9 It shows Figure 8 A cross-sectional view of section BB in the diagram; Figure 10 A perspective view of the cylindrical outer wall of the first insert and the protrusion according to an embodiment is shown; and Figure 11 A perspective view of the first insert according to an embodiment is shown. Detailed Implementation
[0008] Figure 1 An installation diagram of an electromechanical brake is shown, illustrating a shaft 91, a shock absorber 92, a bearing 94, a steering knuckle arm 93, a brake disc 95, and a wheel 96, as well as an electromechanical brake 100 according to an embodiment, which is driven by a motor to provide braking force by clamping the brake disc 95 with a brake caliper. During assembly, the electromechanical brake 100 is mounted on the steering knuckle arm 93, and is also housed within a compact space inside the wheel hub of the wheel 96, thus imposing strict limitations on the volume of the electromechanical brake 100 itself.
[0009] Continue to refer to Figures 2 to 11An electromechanical brake according to an embodiment is described below. The electromechanical brake includes: a main braking module 2 and a brake caliper module 1. The main braking module 2 includes a protrusion 20, which may be generally cylindrical and has a first groove 201. The brake caliper module 1 includes a recess 10 that mates with the protrusion 20 of the main braking module 2, and the recess 10 has a second groove 15. A retaining ring 3 is annular and has a notch 31. When the main braking module 2 and the brake caliper module 1 are assembled, the protrusion 20 of the main braking module 2 is axially inserted into the recess 10 of the brake caliper module 1. The retaining ring 3 is compressed at the first groove 201 to be inserted with the protrusion 20, and unfolds when the first groove 201 and the second groove 15 are aligned (axially aligned). The retaining ring 3 partially overlaps the first groove 201 and the second groove 15 radially, thereby axially restricting the relative position of the main braking module 2 and the brake caliper module 1. In addition, the brake caliper module 1 includes a plurality of channels 11, 12, 13, 14 extending radially into the second slot 15.
[0010] In some embodiments, the plurality of channels include a plurality of pressure channels extending radially into the second groove 15, the plurality of pressure channels being configured to compress the retaining ring 3 from multiple directions. Through the plurality of pressure channels leading to the second groove 15, the retaining ring 3 can be compressed into the first groove 201, thereby axially separating the main brake module 2 and the brake caliper module 1, thereby removing the main brake module 2 from the brake caliper module 1. In some embodiments, fillers 51, 52, and 54 are provided in the plurality of pressure channels.
[0011] In some embodiments, the plurality of pressure channels includes at least one pair of opposing pressure channels, i.e., a pair of pressure channels spaced 180 degrees circumferentially, to compress the retaining ring. In some embodiments, the plurality of pressure channels includes opposing second channels 12 and third channels 14, and a fourth channel 11 spaced 90 degrees from the second channel 12. In some embodiments, a first channel 13 is also provided, wherein the first channel 13, the second channel 12, the third channel 14, and the fourth channel 11 may be evenly distributed circumferentially, for example, the first channel 13 may be spaced 90 degrees from the second channel 12. In some embodiments, the number of the plurality of pressure channels may be four, five, six, or more. In some embodiments, the plurality of pressure channels includes multiple pairs of opposing pressure channels.
[0012] In some embodiments, the fillers 51, 52, and 54 may be sealing plugs, which can serve as dustproof and waterproof agents. The sealing plugs may be made of elastic materials such as rubber or plastic. When it is necessary to disassemble the main brake module 2 and the brake caliper module 1, it is only necessary to remove the sealing plugs and use a pressure rod to extend into the pressure channel to compress the retaining ring 3, while removing the first insert 53 in the first channel 13, thereby separating the main brake module 2 and the brake caliper module 1 axially.
[0013] In some embodiments, the multiple pressure channels have internal threads, and the fillers 51, 52, and 54 have external threads. The fillers 51, 52, and 54 are threadedly engaged with the multiple pressure channels. The inner ends of the fillers 51, 52, and 54 can be used to compress the retaining ring 3; for example, the fillers 51, 52, and 54 can be conceived as bolts. When it is necessary to disassemble the main brake module 2 and the brake caliper module 1, the fillers 51, 52, and 54 only need to be screwed inward to compress the retaining ring 3 at their respective inner ends, while removing the first insert 53, thus separating the main brake module 2 and the brake caliper module 1 axially. When it is necessary to assemble the main brake module 2 and the brake caliper module 1, the fillers 51, 52, and 54 can be screwed outward. Thus, the multiple pressure channels provide convenient disassembly between the main brake module 2 and the brake caliper module 1, thereby allowing easy replacement in case of damage to either one, especially for the more expensive main brake module 2, which is expected to be repeatedly used for various tests. For the product, the easy disassembly between the main brake module 2 and the brake caliper module 1 provides easier maintenance and repair.
[0014] Furthermore, in some embodiments, to achieve better axial restraint, the electromechanical brake further includes an elastic member 4, such as a disc spring, disposed between the outer end face 19 of the notch 10 of the brake caliper module 1 and the shoulder 29 of the protrusion 20 of the main brake module 2. This elastic member 4 is pressed together during the assembly of the brake caliper module 1 and the main brake module 2, thereby applying an axially opposite thrust to both modules, further restricting axial movement between them. Additionally, when it is necessary to disassemble the brake caliper module 1 and the main brake module 2, the presence of the elastic member 4 ensures that the main brake module 2 is automatically ejected axially by the elastic member 4 once the retaining ring 3 is compressed into the first groove 201 and the first insert 53 is removed. In alternative embodiments, the elastic member 4 can be disposed at any suitable location between the brake caliper module 1 and the main brake module 2 and can be selected from any suitable spring or elastic material, such as an elastic pad.
[0015] In some embodiments, the plurality of channels include a first channel 13, through which a first insert 53 is inserted and engages with a protrusion 20 at a first groove 201 to restrict the relative position of the main braking module 2 and the brake caliper module 1 in the circumferential direction. With the aid of the first channel 13, the main braking module 2 and the brake caliper module 1 according to embodiments of the present invention can be axially and circumferentially limited by the retaining ring 3 and the first insert 53, respectively, facilitating assembly between the main braking module 2 and the brake caliper module 1.
[0016] In some embodiments, the first insert 53 also engages with the notch 31 of the retaining ring, thereby restricting the circumferential movement of the retaining ring 31. For example... Figure 10 and Figure 11As shown, in some embodiments, the protrusion 20, such as its outer wall 23, includes cutouts 202 on one or both sides of the first groove 201. The first insert 53 includes a base 530 having a shape matching the first channel 13 and an end portion 531 connected to the base 530. The end portion 531 is shaped to match the cutouts 202 and the notch 31 of the retaining ring 3, so as to engage with both the cutouts 202 and the notch 31 simultaneously, thereby simultaneously circumferentially limiting the brake caliper module 1 and the retaining ring 3. In some embodiments, the end face 532 of the end portion 531 of the first insert 53 is planar and contacts the cutout 202 surface through this planar face 532. In some embodiments, the base 530 of the first insert 53 has external threads, the first channel 13 has internal threads, and the base 530 of the first insert 53 is threadedly engaged with the first channel 13. In this case, the end portion 531 of the first insert 53 may be, for example, cylindrical or other suitable shapes. At this point, after the retaining ring 3 is unfolded, only tightening the first insert 53 is needed to achieve circumferential positioning. It should be understood that when the retaining ring 3 is assembled to the protrusion 20, its notch 31 must be aligned with the first channel 13. This can be achieved through positioning features on the retaining ring 3 and / or the protrusion 20, such as a positioning protrusion. Furthermore, during the assembly of the brake caliper module 1 and the main brake module 2, it is necessary to ensure that the cut 202 and the notch 31 are aligned with the first channel 13. In some embodiments, the base 530 of the first insert 53 is provided with an internal threaded hole, through which the first insert 53 can be easily disassembled.
[0017] In some embodiments, the main braking module includes a brake motor, a transmission mechanism, and an electronic control unit, while the brake caliper module includes a housing and a friction pad support, etc. In some embodiments, such as... Figure 4As shown, the protrusion 20 includes a cylindrical outer wall 23 and a telescopic end wall 21, with a first groove 201 and a shoulder 29 disposed along the outer periphery of the cylindrical outer wall 23. In some embodiments, a ball screw mechanism is housed inside the cylindrical outer wall 23, and the telescopic end wall 21 is connected to the ball screw mechanism, thereby enabling its telescopic movement. Specifically, the ball screw mechanism may include a spindle 221, a plurality of balls 222, and a sleeve 223, the spindle 221 and the sleeve 223 being drivenly connected by the plurality of balls 222, and the sleeve 223 being further connected to the end wall 21, such that rotation of the motor-driven spindle 221 can be converted into telescopic movement of the end wall 21. The brake caliper module 1 includes a housing 101 and a friction pad support 102. A first friction pad 71 and a second friction pad 72 are disposed on the friction pad support 102. The friction pad support 102 is fixedly mounted near the wheel through mounting holes 103. After being fixedly connected to the main brake module 2, the housing 101 is axially slidably supported on the friction pad support 102. The notch 10 of the brake caliper module 1 communicates with the first friction pad 71, allowing the end wall 21 to act on the first friction pad 71. Furthermore, the second friction pad 72 is acted upon via the housing 101, thereby clamping the brake disc 95 to achieve braking. For the specific structure and operation of the electromechanical brake including the main brake module 2 and the brake caliper module 1, please refer to Chinese invention patent application CN117267280A entitled "Electromechanical Brake", the entire contents of which are incorporated herein by reference.
[0018] The electromechanical brake according to the embodiments of this application enables easy assembly and / or disassembly between the main brake module 2 and the brake caliper module 1, thereby enabling maintenance and component replacement of the electromechanical brake.
[0019] The specific embodiments described above are merely for the purpose of more clearly illustrating the principles of this application, wherein various components are clearly shown or described to make the principles of the invention easier to understand. Various modifications or variations can be easily made to this application by those skilled in the art without departing from the scope of this application. Therefore, it should be understood that all such modifications or variations should be included within the patent protection scope of this application.
Claims
1. An electromechanical brake, comprising: The main braking module (2) includes a protrusion (20) having a first groove (201); A brake caliper module (1), the brake caliper module (1) including a recess (10) that mates with a protrusion (20) of the main brake module (2), the recess (10) having a second groove (15); and A retaining ring (3), wherein the retaining ring (3) is annular and has a notch (31); When the main braking module (2) and the brake caliper module (1) are assembled, the protrusion (20) of the main braking module (2) is inserted axially into the notch (10) of the brake caliper module (1), the retaining ring (3) is compressed at the first groove (201) to be inserted with the protrusion (20), and unfolds when the first groove (201) and the second groove (15) are aligned to restrict the relative position of the main braking module (2) and the brake caliper module (1) in the axial direction; The brake caliper module (1) includes a plurality of channels that extend radially to the second groove (15).
2. The electromechanical brake according to claim 1, characterized in that, The plurality of channels include a plurality of pressure channels configured to compress the retaining ring (3) from multiple directions, and the plurality of pressure channels are provided with fillers (51, 52, 54).
3. The electromechanical brake according to claim 2, characterized in that, The plurality of pressure channels include at least one pair of opposing channels, wherein the plurality of pressure channels include opposing second channel (12) and third channel (14) and a fourth channel (11) spaced 90 degrees from the second channel (12).
4. The electromechanical brake according to claim 2, characterized in that, The fillers (51, 52, 54) are sealing plugs, which are removed when the retaining ring (3) is compressed; or The plurality of pressure channels have internal threads, and the filler (51, 52, 54) has external threads. The filler (51, 52, 54) is threadedly engaged with the plurality of pressure channels, and the inner end of the filler (51, 52, 54) is used to compress the retaining ring (3).
5. The electromechanical brake according to claim 1, characterized in that, The plurality of channels include a first channel (13), through which a first insert (53) is inserted and engages with the protrusion (20) at the first groove (201) to restrict the relative position of the main braking module (2) and the brake caliper module (1) in the circumferential direction.
6. The electromechanical brake according to claim 5, characterized in that, The first insert (53) also fits into the notch (31) of the retaining ring.
7. The electromechanical brake according to claim 6, characterized in that, The protrusion (20) includes a cut (202) on one or both sides of the first groove (201), wherein the first insert (53) includes a base (530) having a shape matching the first channel (13) and an end (531) connected to the base (530), the end (531) being shaped to match the cut (202) and the notch (31) of the retaining ring (3) to engage with both the notch (202) and the notch (31) simultaneously, wherein the end face (532) of the end (531) is formed as a plane.
8. The electromechanical brake according to claim 7, characterized in that, The base (530) of the first insert (53) has an external thread, and the first channel (13) has an internal thread. The base (530) of the first insert (53) is threadedly engaged with the first channel (13).
9. The electromechanical brake according to any one of claims 1-8, characterized in that, The electromechanical brake further includes an elastic member (4) disposed between the outer end face (19) of the notch (10) of the brake caliper module (1) and the shoulder (29) of the protrusion (20) of the main brake module (2), wherein the elastic member (4) is a disc spring and is axially pressed when the main brake module (2) is assembled with the brake caliper module (1).
10. The electromechanical brake according to any one of claims 1-8, characterized in that, The protrusion (20) includes a cylindrical outer wall (23) and a retractable end wall (21), the first groove (201) and the shoulder (29) are arranged along the outer periphery of the cylindrical outer wall (23), wherein the cylindrical outer wall (23) houses a ball screw mechanism, and the retractable end wall (21) is connected to the ball screw mechanism, wherein the notch (10) of the brake caliper module (1) communicates with the first friction plate (71), so that the end wall can act on the first friction plate (71).