Transmission assembly, vehicle braking device, vehicle braking system and vehicle

Abstract

The utility model relates to a transmission assembly, a vehicle braking device, a vehicle braking system and a vehicle. A transmission assembly (100) for a vehicle brake system adapted to be coupled with a brake master cylinder (200) and to provide pressure for operating the brake master cylinder (200), the transmission assembly (100) comprising: a sleeve (20) comprising a guide slot arranged on an inner surface of the sleeve (20), a worm gear-worm mechanism (30), and a movement assembly (40), and a movement assembly (40) arranged inside the sleeve and coupled with a worm gear (31) in the worm gear-worm mechanism (30), the movement assembly (40) configured to be guided by a guide slot of the sleeve (20) to translate in a direction parallel to a central axis of the sleeve (20) based on rotation of the worm gear-worm mechanism (30) to generate a pressure for operating the brake master cylinder (200).

Description

Technical Field

[0001] The utility model relates to a vehicle braking function, and more specifically, to a transmission component for a vehicle braking system, a vehicle braking device, a vehicle braking system and a vehicle. Background Art

[0002] The vehicle braking system is used to slow down or stop a moving vehicle, and to keep a stopped vehicle stationary. The vehicle braking system is a key system to ensure vehicle driving safety. The electric brake system is a new type of vehicle braking system, which is not only used in traditional fuel vehicles, but also in new energy vehicles.

[0003] There is still a need to improve the design of electric brake systems, especially to improve the transmission components used in electric brake systems, so that the vehicle braking response is faster, the braking distance is shorter, and the user has a higher degree of comfort during vehicle braking. Summary of the invention

[0004] The present invention aims to solve one or more of the above problems and other problems described in this article that can be solved by the solutions provided by the present invention.

[0005] According to a first aspect, a transmission assembly for a vehicle brake system is provided. The transmission assembly may be adapted to be coupled to a brake master cylinder (e.g., a tandem master cylinder assembly) and to provide pressure for operating the brake master cylinder. The transmission assembly includes a sleeve, a worm gear mechanism, and a motion assembly. The sleeve may include a guide notch arranged on an inner surface of the sleeve. The motion assembly is arranged on the inner side of the sleeve and coupled to a worm gear in the worm gear mechanism. The motion assembly is configured to translate in a direction parallel to a central axis of the sleeve based on a rotation of the worm gear mechanism and guided by the guide notch of the sleeve to generate pressure for operating the brake master cylinder.

[0006] The transmission assembly provided by the utility model can be easily matched with the existing electronic circuit to form an electronic braking system. In addition, the transmission assembly provided also allows the separate manufacturing and design of each component, which also brings benefits in terms of saving resources, improving manufacturing efficiency and maintenance and replacement.

[0007] In one or more embodiments, the motion assembly may include: a spindle and a push rod. The spindle is positioned inside the worm gear and is threadedly connected to the worm gear. The spindle may include a through hole extending along the central axis of the spindle. The push rod may be partially received in the through hole of the spindle, wherein the movement of the push rod in a virtual plane perpendicular to the central axis of the spindle is limited by the through hole.

[0008] In one or more embodiments, the push rod may include a push rod base. The push rod base includes a first section and a second section. The second section has a larger cross-sectional size than the first section. The first section at least extends through the through hole of the spindle, and the second section abuts the spindle at the first end of the spindle. In this way, the push rod can be easily positioned on the spindle, and no other fixings may be required.

[0009] In one or more embodiments, the transmission assembly may further include a leaf spring assembly, and the push rod includes a push rod base. The push rod base may include a first section and a second section. The leaf spring assembly may be arranged on the first section of the push rod, between the second section and the main shaft. The leaf spring assembly is configured to act as a damper for the sudden movement of the push rod in a direction parallel to the central axis of the sleeve. Since the rapid movement of the push rod will cause pressure to be applied to the brake master cylinder more quickly, so that the wheel brake component is more closely and quickly frictionally contacted with the brake disc connected to the wheel, the user driving the vehicle will experience a more obvious forward tilting feeling when the brake function is enabled, which is particularly obvious when the total mass of the vehicle is lighter. Utilizing the design of the leaf spring assembly provided, the initial low rotation speed of the worm-worm gear mechanism can be avoided to cause the rapid movement of the push rod, thereby preventing the more obvious forward tilting feeling felt by the user driving the vehicle when the brake function is lightly enabled. This is particularly advantageous in improving the driving experience of the user.

[0010] In one or more embodiments, the spring sheet assembly may include a first spring sheet and a second spring sheet. The first spring sheet may be arranged on the push rod, and the first spring sheet is recessed toward a first direction. Similarly, the second spring sheet may be arranged on the push rod, and the second spring sheet is recessed toward a second direction opposite to the first direction, and the outer edge of the first spring sheet is configured to abut against the outer edge of the second spring sheet. With such a design, a damper can be conveniently arranged between the push rod and the main shaft. This is practical in terms of improving assembly efficiency.

[0011] In one or more embodiments, the spring leaf assembly may further include a limiting ring. The limiting ring may be arranged between the first spring leaf and the second spring leaf.

[0012] In one or more embodiments, the transmission assembly may further include a stop assembly. The stop assembly includes a biasing member and a snap member connected to the first section by a snap fit. The biasing member is configured to bias against the second end of the main shaft. This can facilitate coaxial positioning of the push rod onto the main shaft.

[0013] In one or more embodiments, the motion assembly may include an anti-rotation member connected to the main shaft. The anti-rotation member may include a protrusion. The protrusion is configured to be received by the guide slot of the sleeve.

[0014] In one or more embodiments, the push rod may also include a push rod tip. The push rod tip includes a base, a first protrusion extending from the base in a first direction, and a second protrusion extending from the base in a second direction opposite to the first direction. The first protrusion is suitable for abutting the brake master cylinder for transmitting the pressure generated by the translational movement of the moving assembly to the brake master cylinder. The second section of the push rod base may include a recess. The push rod tip is connected to the push rod base by inserting the second protrusion of the push rod tip into the recess.

[0015] In one or more embodiments, the transmission assembly may further include a first locating ring and a second locating ring. The first locating ring may be disposed on the first section of the push rod base and abuts against a first end surface of the first end of the spindle adjacent to the spindle. The second locating ring may be disposed on the first section of the push rod base and abuts against a second end surface of the spindle adjacent to the spindle opposite to the spindle.

[0016] According to a second aspect, a vehicle brake device is provided. The vehicle brake device comprises: a transmission assembly according to the first aspect and a brake master cylinder.

[0017] According to one or more embodiments, the vehicle brake device may further include a motor, which is arranged outside the sleeve of the transmission assembly and is configured to be coupled with a worm in a worm gear mechanism.

[0018] According to a third aspect, a vehicle braking system is provided. The vehicle braking system comprises a transmission assembly according to the first aspect, a motor and a controller. The motor is arranged outside a sleeve of the transmission assembly and is configured to be coupled with a worm gear mechanism of the transmission assembly. The controller is electronically coupled to the motor and is configured to control the working state of the motor, such as controlling the power of the motor, in response to an input signal associated with a brake pedal of the vehicle.

[0019] According to a fourth aspect, a vehicle is provided, wherein the vehicle comprises the vehicle braking device according to the second aspect, or the vehicle braking system according to the third aspect.

[0020] These and other aspects will be apparent from and elucidated with reference to the embodiments described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Exemplary embodiments will now be described, by way of example only, with reference to the following drawings, in which:

[0022] Figure 1 is a cross-sectional view showing a vehicle brake device including a transmission assembly and a brake master cylinder connected to the transmission assembly according to a first embodiment of the present disclosure;

[0023] Figure 2 It shows Figure 1 An exploded view of the moving components in the transmission assembly shown;

[0024] Figure 3 It shows Figure 1 A perspective view of the main shaft in the transmission assembly is shown;

[0025] Figure 4 It shows Figure 1 A perspective view of a push rod base of a push rod in the transmission assembly shown;

[0026] Figure 5 It shows Figure 1 A perspective view of a push rod tip portion of a push rod in the transmission assembly shown;

[0027] Figure 6 is a cross-sectional view showing a vehicle brake device including a transmission assembly and a brake master cylinder connected to the transmission assembly according to a second embodiment of the present disclosure;

[0028] Figure 7 It shows Figure 6 An exploded view of the moving components in the transmission assembly shown;

[0029] Figure 8 It shows Figure 6 A cross-sectional view of a moving component in the transmission assembly shown;

[0030] Fig. 9 It shows Figure 6 A perspective view of one of the leaf springs in the leaf spring assembly of the motion assembly is shown;

[0031] Fig.10 It shows Figure 6 A perspective view of a biasing member in the stop assembly is shown; and

[0032] Fig.11 It shows Figure 6 A perspective view of a latch in a stop assembly is shown.

[0033] In general, the same reference numerals are used throughout the drawings and the accompanying specific embodiments to represent the same or similar parts. The drawings are not necessarily drawn to scale. The sizes of parts or regions may be exaggerated for illustration in the drawings. Although the drawings show regions with lines and boundaries, some or all of these lines and / or boundaries may be idealized. In practice, boundaries and / or lines may be unobservable and / or irregular. DETAILED DESCRIPTION

[0034] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third", etc. or similar expressions are only used for description and distinction purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0035] The transmission assembly provided by the present disclosure can be connected to a worm gear mechanism of an output shaft of a motor and generate pressure via the rotation of the worm gear mechanism to operate a brake master cylinder coupled to the transmission assembly. The brake master cylinder is also coupled to a pipeline connected to a wheel brake device (e.g., a brake caliper) of a vehicle. The pressure from the transmission assembly will cause the piston in the brake master cylinder to displace, and then the pressure can be transmitted from the brake master cylinder via the pipeline to actuate the wheel brake device, thereby achieving wheel braking.

[0036] Figure 1 A first embodiment of a vehicle brake device including a transmission assembly 100 and a brake master cylinder 200 is shown. Figure 1 , the vehicle brake device can be configured to be coupled with a pipeline for a wheel brake device (such as a brake caliper) on the brake master cylinder 200 side. The brake master cylinder 200 may include a tandem master cylinder assembly. The vehicle brake device may also include a motor. The motor may be arranged on the outside of the transmission assembly 100 and assembled with the transmission assembly 100. As an example, the transmission assembly 100 may include a main body portion 10, a sleeve 20, a worm gear-worm mechanism 30 and a moving assembly 40. The sleeve 20 may be supported by the main body portion 10 and the sleeve 20 includes a guide notch arranged on the inner surface of the sleeve 20. The worm gear-worm mechanism 30 is arranged on the inner side of the sleeve 20 and includes a worm wheel 31 and a worm 32. The worm wheel 31 is rotatably coupled to the sleeve 20. The worm 32 may be coupled to the worm wheel 31 by a threaded connection and is configured to be coupled with an output shaft of the motor arranged on the outside of the sleeve 20 (outside of the transmission assembly 100). The motion assembly 40 may be configured to be coupled with the worm gear 31, and based on the rotation of the worm gear-worm gear mechanism 30, be guided by the guide notch of the sleeve 20 to translate in a direction parallel to the central axis of the sleeve 20 to generate pressure for operating the brake master cylinder 200. Additionally or alternatively, the transmission assembly 100 may further include a return spring 80 to help the motion assembly 40 reset.

[0037] refer to Figure 2-Figure 3 And still can refer to Figure 1, the motion assembly 40 may include a spindle 41 and a push rod 42. The spindle 41 may be positioned inside the worm gear 31 and threadedly connected to the worm gear 31. With the rotation of the worm gear 31, the spindle 41 is synchronously driven. Specifically, the spindle 41 may be driven to translate relative to the worm gear 31. In this way, the pressure applied to the brake master cylinder can be increased or decreased in a more controllable manner.

[0038] The spindle 41 may include a through hole 410 extending along the central axis of the spindle 41. The push rod 42 may be partially received in the through hole 410 of the spindle 41, so that the movement of the push rod 42 in a virtual plane perpendicular to the central axis of the spindle 41 is limited by the through hole 410. With such an arrangement, the push rod 42 can be easily assembled to the spindle 41, and a strict match between the relative sizes of the spindle 41 and the push rod 42 is not required. This also reduces the requirements for manufacturing precision, which is conducive to improving production efficiency and reducing manufacturing costs.

[0039] refer to Figure 4 In some examples, the push rod 42 may include a push rod base 420. The push rod base 420 includes a first section 4201 and a second section 4202. The second section 4202 has a larger cross-sectional size than the first section 4201. The first section 4201 extends at least through the through hole 410 of the main shaft 41. As an example, the first section 4201 may have a cylindrical shape. The second section 4202 abuts the main shaft 41 at the first end of the main shaft 41. In addition, the second section 4202 has a larger cross-sectional size than the first section 4201 so that the interface between the first section 4201 and the second section 4202 can be used as a stop for components mounted on the push rod base 420. Additionally or alternatively, the first section 4201 may also be provided with a first transition section 4201-1 and a second transition section 4201-2. The first transition section 4201-1 and the second transition section 4201-2 have outer diameters corresponding to the inner diameter of the through hole of the main shaft 41. In particular, the first transition section 4201-1 and the second transition section 4201-2 are sized so that the push rod base 420 inserted into the through hole 410 cannot be radially displaced. This further promotes the efficiency of assembly.

[0040] refer to Figure 5, the push rod 42 may include a push rod tip 421. The push rod tip 421 may include a base 4210, a first protrusion 4211 extending from the base 4210 in a first direction, and a second protrusion 4212 extending from the base 4210 in a second direction opposite to the first direction. The first protrusion 4211 is adapted to abut against the brake master cylinder 200 for transmitting the pressure generated by the translational movement of the motion assembly 40 to the brake master cylinder 200. The push rod tip 421 may further include a fixing ring 4213. The fixing ring 4213 is attached to the second protrusion 4212. Alternatively, the fixing ring 4213 may be molded together with the second protrusion 4212, for example, by an additive manufacturing process or a subtractive manufacturing process. The recess of the second section 4202 may include a corrugated section for fitting the fixing ring 4213 of the push rod tip 421. The independent push rod tip 421 may allow for errors in the length of the push rod base 420. This error can be reduced by adjusting the height or length of the push rod tip 421.

[0041] Figure 6 A second embodiment of a vehicle brake device including a transmission assembly 100 and a brake master cylinder 200 is shown. Figure 6 , and about Figure 1 Similar to the first embodiment of the vehicle brake device described above, the transmission assembly 100 may include a main body 10, a sleeve 20, a worm gear mechanism 30 and a moving assembly 40. The contents of the same parts are omitted here for the sake of brevity.

[0042] refer to Figure 7-Figure 8 And still available for reference Figure 6 , the transmission assembly 100 may further include a leaf spring assembly 50. The leaf spring assembly 50 is arranged on the push rod base 420 of the push rod 42, between the main shaft 41 and the push rod 42, and is configured to act as a damper for the sudden movement of the push rod 42 in a direction parallel to the central axis of the sleeve 20. By arranging the leaf spring assembly 50, the initial translation speed of the push rod 42 when the push rod 42 is initially activated can be reduced. The reduced initial translation speed of the push rod 42 will allow pressure to be applied to the brake master cylinder 200 in a gradually increasing manner, so that the wheel brake device can gradually brake the wheel. This can reduce the degree to which the driver or passenger on the vehicle "leans forward" due to inertia when the vehicle speed is reduced. This brings benefits in improving the vehicle use experience of the driver or passenger. When the transmission assembly provided by the present disclosure is applied to a vehicle with a lighter mass, such benefits are very practical and obvious.

[0043] In some examples, the spring sheet assembly 50 includes a first spring sheet 51 and a second spring sheet 52. The first spring sheet 51 is arranged on the push rod 42, and the first spring sheet 51 is concave toward a first direction. The second spring sheet 52 is arranged on the push rod 42 and the second spring sheet 52 is concave toward a second direction opposite to the first direction. The outer edge 511 of the first spring sheet 51 is configured to abut against the outer edge of the second spring sheet 52. Although only two spring sheets are shown in the figure, a spring sheet assembly with a greater number of spring sheets is also possible. Additionally or alternatively, the first spring sheet 51 and / or the second spring sheet 52 may include a butterfly spring.

[0044] Figure 6 Some examples of the first spring piece 51 are shown. As shown, the first spring piece 51 may have a hole 510 and an outer edge 511. The size of the hole 510 may be determined based on the outer diameter of the first section 4201 of the push rod base 420. The second spring piece 52 may have a similar structure and size as the first spring piece 51.

[0045] The spring sheet assembly 50 may further include a limiting ring 53. The limiting ring 53 may be arranged between the first spring sheet 51 and the second spring sheet 52 to position the first spring sheet 51 and the second spring sheet 52. The limiting ring 53 may also be configured to absorb and store energy during the deformation process of the first spring sheet 51 and / or the second spring sheet 52.

[0046] In the first and second embodiments of the vehicle brake device of this invention, reference is made to Figure 1 and Figure 6 The transmission assembly may further include a stopper assembly 60. The stopper assembly 60 is mounted on a second end of the main shaft 41 opposite to the first end. Figure 10-11 And still available for reference Figure 1 and Figure 6 , the limit assembly 60 may include a biasing member 61 and a catch 62 connected to the first section 4201 by a snap fit. The biasing member 61 is configured to bias against the second end of the main shaft 41. The catch 62 may be coupled with an annular groove 4204 provided on the first section 4201. As an example, the catch 62 may be made of a flexible material. By providing the limit assembly 60, the relative displacement between the push rod 42 and the main shaft 41 may be limited. In addition, by means of the biasing of the main shaft 41 by the biasing member 61, the alignment between the central axis of the push rod 42 and the central axis of the main shaft 41 may be promoted. During the application of pressure to the piston of the brake master cylinder 200 by the push rod 42, this facilitates the pressure to be applied to the piston in a direction perpendicular to the surface of the piston, thereby utilizing the applied pressure with maximum efficiency.

[0047] In some embodiments, the transmission assembly may further include a first positioning ring 423. The first positioning ring 423 may include, for example, a hollow circular ring or other possible shapes. The first positioning ring 423 may be disposed on the first section 4201 of the push rod base 420 and abuts against the first end surface of the first end of the spindle 41 adjacent to the spindle 41. The first positioning ring 423 is used to define the orientation of the push rod 42 relative to the spindle 41. The first positioning ring 423 may also be used to contact or abut against the second spring leaf 52 (if present), thereby defining the position of the second spring leaf 52.

[0048] In some embodiments, the transmission assembly may further include a second locating ring 424. The second locating ring 424, for example, includes a hollow circular ring or has other possible shapes. The second locating ring 424 may be disposed on the first section 4201 of the push rod base 420 and abuts against the second end surface of the second end of the spindle 41 adjacent to the spindle 41. The first locating ring 423 is used to define the orientation of the push rod 42 relative to the spindle 41. In one example, when the first locating ring is also present, the combination of the first locating ring 423 and the second locating ring 424 is used to define the orientation of the push rod 42 relative to the spindle 41.

[0049] The present disclosure also provides a vehicle braking system, which includes a transmission assembly, a motor and a controller described according to the first and second embodiments of the vehicle braking device. The controller is coupled to the motor and can adjust the power of the motor using an input signal input by the user via the brake pedal. Depending on the power of the motor, the push rod in the transmission assembly is pushed forward or moved backward to enable or disable the braking function, or the push rod in the transmission assembly is moved faster or slower to achieve violent braking or slow braking. Thus, the user can control the driving speed of the vehicle and have a better driving experience. As an alternative, the controller can also be coupled to an automatic driving system. During the period when the automatic driving system takes over the user's manipulation of the vehicle, the automatic driving system can send an input signal to the controller to control the moving direction and speed of the push rod in the transmission assembly. This brings benefits to the sensitive control of the vehicle during automatic driving. A vehicle is also provided, which can apply the vehicle braking device or vehicle braking system described herein. Such a vehicle also enjoys the benefits described about the transmission assembly, vehicle braking device and vehicle braking system of the present disclosure. For the sake of simplicity, it will not be repeated here.

[0050] Although the subject matter has been described in language specific to structural features and / or methodological acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A transmission assembly (100) for a vehicle braking system, characterized in that: The transmission assembly (100) is suitable for coupling with a brake master cylinder (200) and providing pressure for operating the brake master cylinder (200), and the transmission assembly (100) comprises: a sleeve (20), the sleeve (20) comprising a guide notch arranged on an inner surface of the sleeve (20), a worm gear mechanism (30), and A motion component (40) is arranged on the inner side of the sleeve and coupled to the worm gear (31) in the worm gear mechanism (30). The motion component (40) is configured to translate in a direction parallel to the central axis of the sleeve (20) based on the rotation of the worm gear mechanism (30) and guided by the guide slot of the sleeve (20) to generate the pressure for operating the brake master cylinder (200).

2. The transmission assembly according to claim 1, characterized in that: The motion assembly (40) comprises: a main shaft (41) positioned inside the worm gear (31) and threadedly connected to the worm gear (31), the main shaft (41) comprising a through hole (410) extending along a central axis of the main shaft (41); A push rod (42), the push rod (42) being partially received in the through hole (410) of the main shaft (41), wherein the movement of the push rod (42) in a virtual plane perpendicular to the central axis of the main shaft (41) is limited by the through hole (410).

3. The transmission assembly according to claim 2, characterized in that: The push rod (42) includes a push rod base (420), the push rod base (420) includes a first section (4201) and a second section (4202), the second section (4202) having a larger cross-sectional size than the first section (4201), the first section (4201) at least extending through the through hole (410) of the main shaft (41), and the second section (4202) adjacent to the main shaft (41) at the first end of the main shaft (41).

4. The transmission assembly according to claim 2, characterized in that: The transmission assembly further comprises a spring sheet assembly (50), the push rod (42) comprises a push rod base (420), the push rod base (420) comprises a first section (4201) and a second section (4202), The spring leaf assembly (50) is arranged on the first section (4201) of the push rod (42), between the second section (4202) and the main shaft (41), and the spring leaf assembly (50) is configured to serve as a damper for sudden movement of the push rod (42) in a direction parallel to the central axis of the sleeve (20).

5. The transmission assembly according to claim 4, characterized in that: The spring leaf assembly (50) comprises: a first spring piece (51), the first spring piece (51) being arranged on the push rod (42), the first spring piece (51) being concave toward a first direction, and a second spring piece (52), the second spring piece (52) being arranged on the push rod (42), the second spring piece (52) being concave toward a second direction opposite to the first direction, and The outer edge (511) of the first spring piece (51) is configured to be adjacent to the outer edge of the second spring piece (52).

6. The transmission assembly according to claim 5, characterized in that: The spring sheet assembly (50) further comprises a limiting ring (53), wherein the limiting ring (53) is arranged between the first spring sheet (51) and the second spring sheet (52).

7. The transmission assembly according to any one of claims 3 to 6, characterized in that: It also includes a limit assembly (60), which includes a biasing component (61) and a snap-fitting member (62) connected to the first section (4201), and the biasing component (61) is configured to bias against the second end of the main shaft (41).

8. The transmission assembly according to any one of claims 2 to 6, characterized in that: The motion assembly (40) includes an anti-rotation member (43) connected to the main shaft (41), the anti-rotation member (43) including a protrusion configured to be received by the guide slot of the sleeve (20).

9. The transmission assembly according to any one of claims 3 to 6, characterized in that: The push rod (42) further comprises a push rod tip (421), the push rod tip (421) comprising a base (4210), a first protrusion (4211) extending from the base (4210) in a first direction, and a second protrusion (4212) extending from the base (4210) in a second direction opposite to the first direction, the first protrusion (4211) being adapted to abut against the brake master cylinder (200) for transmitting pressure generated by the translational movement of the moving assembly (40) to the brake master cylinder (200), The second section (4202) includes a recess, and the push rod tip (421) is connected to the push rod base (420) by inserting the second protrusion (4212) of the push rod tip (421) into the recess.

10. The transmission assembly according to any one of claims 3 to 6, characterized in that: Also includes: a first positioning ring (423) disposed on the first section (4201) of the push rod base (420) and adjacent to a first end surface of the main shaft (41) adjacent to a first end of the main shaft (41); and A second positioning ring (424) is disposed on the first section (4201) of the push rod base (420) and is adjacent to a second end surface of the main shaft (41) adjacent to an opposite second end of the main shaft (41).

11. A vehicle braking device, characterized in that: include: The transmission assembly (100) according to any one of claims 1 to 10; and The brake master cylinder (200).

12. The vehicle braking device according to claim 11, characterized in that: Also includes: A motor is arranged outside the sleeve (20) of the transmission assembly (100) and is configured to be coupled to a worm (32) in the worm gear mechanism (30).

13. A vehicle braking system, characterized in that: include: The transmission assembly according to any one of claims 1 to 10, a motor, the motor being arranged outside the sleeve (20) of the transmission assembly (100) and being configured to be coupled with a worm (32) in the worm gear mechanism (30) of the transmission assembly (100); and A controller is electronically coupled to the motor and is configured to control power to the motor in response to an input signal associated with a brake pedal of the vehicle.

14. A vehicle, characterized in that: include: A vehicle braking device according to any one of claims 11 to 12, or The vehicle braking system of claim 13.

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