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, the transmission assembly (100) comprising: a sleeve (20) comprising a guide slot arranged on an inner surface of the sleeve (20), a motion assembly (40) positioned inside the sleeve (20) and comprising: a main shaft (41) comprising a through hole (410) extending along a central axis of the main shaft (41); the utility model relates to an anti-rotation device (10) comprising a sleeve (20), a spindle (41) having a through-hole (410), a push rod (42) partially received in the through-hole (410) of the spindle (41), and an anti-rotation member (43) connected at a first side with the spindle (41) and slidably coupled at a second side with a guide slot of the sleeve (20).

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 park a moving vehicle, and to keep a stopped vehicle stationary. The vehicle braking system is operated by the user to achieve slow or fast vehicle deceleration. As a new vehicle braking system, the electric braking system can use electronic devices such as controllers, such as MCU.

[0003] It is desirable to provide a vehicle braking device to adapt to an electric braking system. In addition, it is also desirable to provide a transmission assembly for a vehicle braking system so that it can adapt to different types of brake master cylinders. 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 includes: a sleeve and a moving assembly. The sleeve includes a guide notch arranged on an inner surface of the sleeve. The moving assembly is positioned inside the sleeve. The moving assembly may include a main shaft, a push rod and an anti-rotation member. The main shaft includes a through hole extending along a central axis of the main shaft. The push rod is partially received in the through hole of the main shaft. The anti-rotation member is connected to the main shaft at a first side of the anti-rotation member and is slidably coupled to the guide notch of the sleeve at a second side of the anti-rotation member.

[0006] The transmission assembly provided by the present disclosure can be matched with the pipelines / lines of the existing electric brake system to form an electronic brake system. In addition, the transmission assembly provided by the present disclosure can adjust the position of the push rod relative to the sleeve to adapt to various types of brake master cylinders. When the piston of the brake master cylinder has different strokes, the adjustable position of the push rod in the sleeve provides application flexibility of the transmission assembly. In addition, the transmission assembly is easy to assemble and disassemble, and allows replacement of part or all of the components during maintenance.

[0007] In one or more embodiments, the transmission assembly may further include a worm gear-worm mechanism. The worm gear in the worm gear-worm mechanism includes a worm gear body and a first extension portion extending from the worm gear body. The first extension portion may be threadedly connected to the main shaft.

[0008] In one or more embodiments, the transmission assembly may further include: a first cylindrical support or a second cylindrical support, wherein the first cylindrical support or the second cylindrical support is arranged on the first extension portion and is used to define a minimum distance between the anti-rotation member and the worm gear body.

[0009] In one or more embodiments, the first end of the first cylindrical support abuts the worm wheel body, and when the second end of the first cylindrical support abuts the anti-rotation member at a second side of the anti-rotation member, the distance between the anti-rotation member and the worm wheel body is a minimum distance.

[0010] In one or more embodiments, the first cylindrical support includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than or equal to the first inner diameter, the first portion being configured to connect to the first extension portion of the worm gear, and the second portion being used to abut against the worm gear body and the anti-rotation member.

[0011] In one or more embodiments, the first end of the second cylindrical support abuts the worm wheel body, and when the second end of the second cylindrical support abuts the anti-rotation member at a first side of the anti-rotation member, the distance between the anti-rotation member and the worm wheel body is a minimum distance.

[0012] In one or more embodiments, the second cylindrical support includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than or equal to the first inner diameter. The first portion of the second cylindrical support is configured to be connected to the first extension portion of the worm gear and is arranged to abut the anti-rotation member. The second portion of the second cylindrical support is used to abut the worm gear body.

[0013] In one or more embodiments, the worm wheel may include a second extension portion extending from the worm wheel body. The second extension portion is farther from the main shaft than the first extension portion. The second extension portion of the worm wheel is used to define a minimum distance between the anti-rotation member and the worm wheel body.

[0014] In one or more embodiments, the transmission assembly may further include a stop assembly. The stop assembly is arranged on the push rod and includes a biasing component and a snap-fit ​​member connected to the push rod base of the push rod. The biasing component is configured to bias against the main shaft.

[0015] According to a second aspect, a vehicle braking device is provided. The vehicle braking device may include: a transmission assembly according to the first aspect and a brake master cylinder, such as a tandem master cylinder assembly.

[0016] According to one or more embodiments, the vehicle brake device may further include a motor. The motor is arranged outside the sleeve of the transmission assembly and is configured to be coupled to the transmission assembly through a worm gear mechanism.

[0017] 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 the sleeve of the transmission assembly and is configured to be coupled to the transmission assembly through a worm-worm mechanism. The controller is electronically coupled to the motor and is configured to control the power of the motor in response to an input signal associated with a brake pedal or other brake request device of the vehicle. In some embodiments, the other brake request device includes, for example, a chassis domain controller. The chassis domain controller can be configured to provide feedback related to the vehicle state that can be presented to a user, and optionally, can provide an input signal for controlling the motor according to the vehicle driving mode.

[0018] 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.

[0019] These and other aspects will be apparent from and elucidated with reference to the embodiments described hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Exemplary embodiments will now be described, by way of example only, with reference to the following drawings, in which:

[0021] 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;

[0022] Figure 2 yes Figure 1 A partial enlarged view showing the relative positions between the anti-rotation member, the first cylindrical support and the worm wheel in the worm-worm mechanism;

[0023] Figure 3 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;

[0024] Figure 4 yes Figure 3 A partial enlarged view showing the relative positions between the anti-rotation member, the second cylindrical support and the worm wheel in the worm-worm mechanism;

[0025] Figure 5 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 third embodiment of the present disclosure;

[0026] Figure 6 yes Figure 5 A partial enlarged view showing the relative position between the anti-rotation member and the worm wheel in the worm-worm mechanism;

[0027] Figure 7 is a perspective view showing a biasing member in a stop assembly; and

[0028] Figure 8 is a perspective view showing a buckle in a limiting assembly.

[0029] 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

[0030] 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.

[0031] The transmission assembly provided by the present disclosure can generate pressure by means of the rotation of a worm gear-worm mechanism connected to the output shaft of the motor 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 (such as a brake caliper) of the 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.

[0032] 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 braking device can be configured to be coupled with a pipeline for a wheel braking 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 braking 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 10, a sleeve 20 and a moving assembly 40. The sleeve 20 may be supported by the main body 10 and the sleeve 20 includes a guide notch arranged on the inner surface of the sleeve 20. The moving assembly 40 includes a main shaft 41, a push rod 42 and an anti-rotation member 43. Additionally, the vehicle braking device may also be provided with a return spring 80. One end of the return spring 80 may be connected to the brake master cylinder 200. The other end of the return spring 80 may be connected to the anti-rotation member 43.

[0033] The transmission assembly 100 may further include a worm gear mechanism 30. The worm gear mechanism 30 is arranged inside 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 a motor arranged outside the sleeve 20 (outside the transmission assembly 100).

[0034] In some examples, the spindle 41 may be positioned inside the worm wheel 31 and threadedly connected to the worm wheel 31 in the worm gear mechanism 30. In particular, the worm wheel 31 includes a worm wheel body 310 and a first extension portion 311 extending from the worm wheel body 310. The first extension portion 311 is threadedly connected to the spindle 41. With the rotation of the worm wheel 31, the spindle 41 is synchronously driven. Specifically, the spindle 41 can be driven to translate relative to the worm wheel 31. In this way, the pressure applied to the brake master cylinder can be increased or decreased in a more controllable manner.

[0035] 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. The movement of the push rod 42 in a virtual plane perpendicular to the central axis of the spindle 41 may be 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.

[0036] In some examples, the anti-rotation member 43 may include a portion in contact with the main shaft 41. The portion of the anti-rotation member 43 for contacting the main shaft 41 may be positioned at one end of the main shaft. Optionally, the anti-rotation member 43 is connected to the main shaft 41 through the portion. The portion may have a concave-convex structure, a corresponding concave-convex structure may be provided at one end of the main shaft, and the concave-convex structure of the portion cooperates with the corresponding concave-convex structure to assemble the anti-rotation member 43 to the main shaft. In one example, the concave-convex structure includes peaks and valleys formed by arranging a number of grooves. The corresponding concave-convex structure includes corresponding peaks and valleys formed by arranging a number of grooves. The peak of the concave-convex structure is used to match the corresponding valley. Similarly, the valley of the concave-convex structure is used to match the corresponding peak. In addition, the displacement of the anti-rotation member 43 relative to the main shaft 41 can be limited by the main shaft 41, for example, the anti-rotation member 43 cannot be displaced relative to the main shaft 41 or the range of displacement is limited. When the concavo-convex structure of part of the anti-rotation member 43 matches with the corresponding concavo-convex structure, the anti-rotation member 43 can be restricted by the main shaft 41 so that the anti-rotation member 43 can only be displaced in one direction but not in the opposite direction. For example, it cannot move toward the other end of the main shaft 41.

[0037] refer to Figure 2 And continue to refer to Figure 1 , the transmission assembly may further include a first cylindrical support 111. The first cylindrical support 111 is arranged on the first extension portion 311, and is used to define the minimum distance between the anti-rotation member 43 and the worm gear body 310. Using an independent first cylindrical support to define the minimum distance between the anti-rotation member 43 and the worm gear body 310 can allow the transmission assembly of the present disclosure to adapt to different types of brake master cylinders 200. When the pistons of different types of brake master cylinders 200 are in different positions, such a design allows the transmission assembly 100 provided by the present disclosure to adapt to the strokes of different pistons by only replacing the first cylindrical support. This increases the usability of the transmission assembly 100 for various types of brake master cylinders 200.

[0038] In some examples, the first end of first cylindrical support 111 may abut against worm wheel body 310, and when the second end of first cylindrical support 111 abuts against anti-rotation member 43 at a second side of anti-rotation member 43, the distance between anti-rotation member 43 and worm wheel body 310 is the minimum distance.

[0039] As an example, the first cylindrical support 111 includes a first portion 111-1 having a first inner diameter and a second portion 111-2 having a second inner diameter greater than or equal to the first inner diameter. The first portion 111-1 of the first cylindrical support 111 is configured to be connected to the first extension portion 311 of the worm wheel 31, and the second portion 111-2 of the first cylindrical support 111 is used to abut against the worm wheel body 310 and the anti-rotation member 43. With such a design, the space requirement for accommodating the first cylindrical support 111 between the anti-rotation member 43 and the worm wheel 31 can be reduced. This brings benefits in reducing the overall length of the transmission assembly 100.

[0040] Figure 3 A second embodiment of a vehicle brake device including a transmission assembly 100 and a master brake cylinder 200 is shown. Figure 3 The example shown has Figure 1 The transmission assembly 100 is similarly configured. Figure 3 The transmission assembly 100 may include a body portion 10, a sleeve 20, a worm gear mechanism 30 and a moving assembly 40. The sleeve 20 may be supported by the body portion 10 and the sleeve 20 includes a guide notch arranged on an inner surface of the sleeve 20. The moving assembly 40 includes a main shaft 41, a push rod 42 and an anti-rotation member 43.

[0041] refer to Figure 4 And continue to refer to Figure 3 The transmission assembly may further include a second cylindrical support 112 . The second cylindrical support 112 or the second cylindrical support 112 is arranged on the first extension portion 311 , and is used to define a minimum distance between the anti-rotation member 43 and the worm wheel body 310 .

[0042] Similar to the function of the first cylindrical support 111, the use of the independent second cylindrical support 112 to define the minimum distance between the anti-rotation member 43 and the worm gear body 310 can allow the transmission assembly of the present disclosure to adapt to different types of brake master cylinders 200. When the pistons of different types of brake master cylinders 200 are in different positions, such a design allows only the second cylindrical support to be replaced to adapt the transmission assembly 100 provided by the present disclosure to the strokes of different pistons. This increases the availability of the transmission assembly 100 for multiple types of brake master cylinders 200.

[0043] Different from the first cylindrical support 111, the first end of the second cylindrical support 112 abuts against the worm wheel body 310, and when the second end of the second cylindrical support 112 abuts against the anti-rotation member 43 at the first side of the anti-rotation member 43, the distance between the anti-rotation member 43 and the worm wheel body 310 is the minimum distance.

[0044] As an example, the second cylindrical support 112 includes a first portion 112-1 having a first inner diameter and a second portion 112-2 having a diameter greater than or equal to the first inner diameter. The first portion 112-1 of the second cylindrical support 112 is configured to be connected to the first extension portion 311 of the worm wheel 31 and is arranged to abut against the anti-rotation member 43. The second portion 112-2 of the second cylindrical support 112 is used to abut against the worm wheel body 310. With such a design, the second side of the anti-rotation member 43 does not have to be provided with an end face that abuts against the second cylindrical support 112, thereby allowing the shape or structure of the anti-rotation member 43 to be simplified, so that the production and manufacturing process of the anti-rotation member 43 can be simplified. This can also improve the production and manufacturing efficiency of the transmission assembly 100 of the present disclosure.

[0045] Figure 5 A third embodiment of a vehicle brake device including a transmission assembly 100 and a master cylinder 200 is shown. Figure 5 The example shown has Figure 1 The transmission assembly 100 is similarly configured. Figure 5 The transmission assembly 100 may include a body portion 10, a sleeve 20, a worm gear mechanism 30 and a moving assembly 40. The sleeve 20 may be supported by the body portion 10 and the sleeve 20 includes a guide notch arranged on an inner surface of the sleeve 20. The moving assembly 40 includes a main shaft 41, a push rod 42 and an anti-rotation member 43.

[0046] refer to Figure 6 And continue to refer to Figure 5 , the worm wheel 31 may include a second extension portion 312 extending from the worm wheel body 310. The second extension portion 312 of the worm wheel 31 is farther from the main shaft 41 than the first extension portion 311. The second extension portion 312 of the worm wheel 31 is used to define the minimum distance between the anti-rotation member 43 and the worm wheel body 310. In this way, the total number of parts of the transmission assembly 100 can be reduced and the steps for assembling the transmission assembly 100 can be simplified, which brings benefits in terms of improving the efficiency of assembling the transmission assembly.

[0047] Additionally or alternatively, in the first, second and third embodiments of the vehicle brake device of this invention, reference is made to Figure 1 , Figure 3 and Figure 5 The transmission assembly 100 may further include a stop assembly 60. The stop assembly 60 is mounted at the second end of the main shaft 41. Figure 7-Figure 8 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. In particular, the catch may include a spring washer. 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 biasing member 61 on the main shaft 41, 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 master cylinder 200 by the push rod 42, this facilitates the pressure to be applied to the piston in a perpendicular manner to the surface of the piston, thereby utilizing the applied pressure with maximum efficiency.

[0048] 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 controller and can adjust the power of the motor using an input signal input by the user via a pedal or an input signal of other braking request devices. In some embodiments, other braking request devices include, for example, a chassis domain controller. The chassis domain controller can be configured to provide feedback related to the vehicle state that can be presented to the user, and optionally, can provide an input signal for controlling the motor according to the vehicle driving mode. 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 autonomous driving system. During the period when the autonomous driving system takes over the user's manipulation of the vehicle, the autonomous 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 autonomous 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 in relation to the transmission assembly, vehicle brake device and vehicle brake system of the present disclosure. For the sake of brevity, no further description is given here.

[0049] 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) comprises: a sleeve (20) and a moving assembly (40) positioned inside the sleeve (20), wherein the sleeve (20) comprises a guide notch arranged on an inner surface of the sleeve (20), The motion assembly (40) comprises: A main shaft (41), the main shaft (41) comprising a through hole (410) extending along a central axis of the main shaft (41); a push rod (42) which is partially received in the through hole (410) of the spindle (41), and An anti-rotation member (43) is connected to the main shaft (41) at a first side and is slidably coupled to the guide slot of the sleeve (20) at a second side.

2. The transmission assembly according to claim 1, characterized in that: It also includes a worm gear mechanism (30), wherein the worm gear (31) in the worm gear mechanism (30) includes a worm gear body (310) and a first extension portion (311) extending from the worm gear body (310), and the first extension portion (311) is threadedly connected to the main shaft (41).

3. The transmission assembly according to claim 2, characterized in that: Also includes: A first cylindrical support (111) or a second cylindrical support (112), which is arranged on the first extension portion (311) and is used to define a minimum distance between the anti-rotation member (43) and the worm wheel body (310).

4. The transmission assembly according to claim 3, characterized in that: The first end of the first cylindrical support member (111) abuts against the worm wheel body (310), and when the second end of the first cylindrical support member (111) abuts against the anti-rotation member (43) at the second side of the anti-rotation member (43), the distance between the anti-rotation member (43) and the worm wheel body (310) is the minimum distance.

5. The transmission assembly according to claim 3, characterized in that: The first cylindrical support member (111) includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than or equal to the first inner diameter, the first portion being configured to be connected to the first extension portion (311) of the worm gear (31), and the second portion being used to abut against the worm gear body (310) and the anti-rotation member (43).

6. The transmission assembly according to claim 3, characterized in that: The first end of the second cylindrical support member (112) abuts against the worm wheel body (310), and when the second end of the second cylindrical support member (112) abuts against the anti-rotation member (43) on the first side of the anti-rotation member (43), the distance between the anti-rotation member (43) and the worm wheel body (310) is the minimum distance.

7. The transmission assembly according to claim 6, characterized in that: The second cylindrical support (112) includes a first portion having a first inner diameter and a second portion having a second inner diameter greater than or equal to the first inner diameter, the first portion being configured to be connected to the first extension portion (311) of the worm gear (31) and arranged to abut against the anti-rotation member (43), and the second portion being used to abut against the worm gear body (310).

8. The transmission assembly according to claim 2, characterized in that: The worm wheel (31) includes a second extension portion (312) extending from the worm wheel body (310), wherein the second extension portion (312) is farther from the main shaft (41) than the first extension portion (311), and the second extension portion (312) of the worm wheel (31) is used to define a minimum distance between the anti-rotation member (43) and the worm wheel body (310).

9. The transmission assembly according to any one of claims 1 to 8, characterized in that: It also includes a limit assembly (60), which is arranged on the push rod (42) and includes a biasing component (61) and a snap-fit ​​member (62) connected to the push rod base of the push rod (42) by snap-fit, and the biasing component (61) is configured to bias against the main shaft (41).

10. A vehicle braking device, characterized in that: include: The transmission assembly (100) according to any one of claims 1 to 9; as well as Brake master cylinder (200).

11. The vehicle braking device according to claim 10, 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 the transmission assembly (100) via a worm gear mechanism (30).

12. A vehicle braking system, characterized in that: include: The transmission assembly according to any one of claims 1 to 9, a motor, the motor being arranged outside the sleeve (20) of the transmission assembly (100) and being configured to be coupled to the transmission assembly (100) via a worm gear mechanism (30); 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.

13. A vehicle, characterized in that: include: A vehicle braking device according to any one of claims 10 to 11, or The vehicle braking system of claim 12.

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