Spring assembly, brake master cylinder, brake assembly and vehicle

Abstract

The utility model relates to a spring assembly, a brake master cylinder, a brake assembly and a vehicle. The brake master cylinder comprises a first spring seat, a second spring seat and a spring. The two ends of the spring are connected with the first spring seat and the second spring seat respectively, and the spring is arranged on at least one of the first spring seat and the second spring seat in a sleeving mode; the first spring seat is provided with a first avoiding channel so that at least part of the second spring seat can move relative to the first spring seat in the first avoiding channel in the axial direction of the spring. And / or the second spring seat is provided with a second avoiding channel, so that at least part of the first spring seat moves relative to the second spring seat in the second avoiding channel in the axial direction of the spring. The first spring seat and / or the second spring seat are / is provided with the avoiding channel, so that at least one spring seat can be nested in the other spring seat, and optimization of space layout and reduction of cost are facilitated.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a spring assembly, a brake master cylinder, a brake assembly, and a vehicle. Background Technology

[0002] As one of the core systems of a vehicle chassis, the brake master cylinder plays a crucial role in vehicle safety by enabling the vehicle to decelerate or even stop at the driver's command. When the driver actuates the brake pedal, the piston in the brake master cylinder displaces against the spring assembly. Due to the piston's displacement within the hydraulic cylinder, the internal volume of the hydraulic cylinder decreases, thereby pressurizing the fluid present within it and delivering it out of the brake master cylinder through at least one of the hydraulic connections to control at least one of the wheel brakes.

[0003] A spring seat is usually installed in the brake master cylinder chamber to tighten the spring. However, if the spring seat is too large, it will increase the volume of the chamber, which in turn increases the volume of the brake master cylinder, which is not conducive to the miniaturization of the product. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a spring assembly that, by providing clearance channels in the first spring seat and / or the second spring group, allows at least one spring group to be nested within the other spring seat, thereby optimizing spatial layout and reducing the overall cost of the brake assembly. Furthermore, this application also provides a brake master cylinder, a brake assembly, and a vehicle equipped with this spring assembly, specifically including the following solutions:

[0005] In a first aspect, this application provides a spring assembly, characterized in that it comprises: a first spring seat, a second spring seat, and a spring; the two ends of the spring are respectively connected to the first spring seat and the second spring seat, and the spring is sleeved on at least one of the first spring seat and the second spring seat;

[0006] The first spring seat is provided with a first clearance channel, so that at least a portion of the second spring seat can move relative to the first spring seat within the first clearance channel along the axial direction of the spring; and / or,

[0007] The second spring seat is provided with a second clearance channel, so that at least a portion of the first spring seat can move relative to the second spring seat in the axial direction of the spring within the second clearance channel.

[0008] The brake master cylinder of this application reduces the volume of the entire spring assembly by providing clearance channels in the first spring seat and / or the second spring group, allowing at least one spring group to be nested within the other spring seat.

[0009] In one embodiment, the first spring seat includes a first support portion and a first extension portion connected to each other, the first extension portion forming the first clearance channel, and the second spring seat being at least partially received in the first clearance channel;

[0010] The second spring seat includes a second support portion and a second extension portion connected to each other, the second extension portion forming a second clearance channel, and the first spring seat being at least partially received in the second clearance channel;

[0011] The two ends of the spring are connected to the first support portion and the second support portion, respectively.

[0012] In one embodiment, in a plane that at least partially passes through the axis of the spring, the projection of the first extension and the projection of the second extension at least partially coincide in the radial direction of the spring, and / or, in the circumferential direction of the spring, a portion of the first extension and a portion of the second extension are spaced apart.

[0013] In one embodiment, the first clearance passage has a first opening, and the second clearance passage has a second opening;

[0014] The opening directions of the first opening and the second opening are perpendicular to the axial direction of the spring; and / or, the opening directions of the first opening and the second opening intersect.

[0015] In one embodiment, the first extension includes a first connecting portion and at least two first sub-extensions, the two ends of the at least two first sub-extensions being respectively connected to the first connecting portion and the first supporting portion, and the first clearance channel being opened between the at least two first sub-extensions;

[0016] The second extension includes a second connecting portion and at least two second sub-extensions, the two ends of the at least two second sub-extensions being connected to the second connecting portion and the second supporting portion respectively, and the second clearance channel being opened between the at least two second sub-extensions.

[0017] In one embodiment, the first sub-extension and the second sub-extension are spaced apart in the circumferential direction of the spring.

[0018] In one embodiment, the spring assembly satisfies at least one of the following:

[0019] The length of the first connecting part is greater than the width of the second connecting part, and the length of the second connecting part is greater than the width of the first connecting part;

[0020] The length of the first spring seat in the axial direction is greater than the compression height of the spring;

[0021] The length of the first clearance channel and / or the second clearance channel in the axial direction of the spring is greater than the stroke of the spring;

[0022] The length of the first clearance channel in the axial direction of the spring is not greater than the length of the first spring seat in the axial direction of the spring.

[0023] In one embodiment, at least a portion of the first connecting portion is housed within the second clearance channel, and at least a portion of the second connecting portion is housed within the first clearance channel.

[0024] In one embodiment, the second support portion includes at least two second sub-support portions, each second sub-extension portion connecting to one second sub-support portion, a second gap being formed between the second sub-support portions, and the second gap communicating with the second clearance channel.

[0025] In one embodiment, the first support portion includes a plurality of first sub-support portions, the first sub-support portions being distributed circumferentially along the first support portion, and a first gap being formed between the first sub-support portions.

[0026] In one embodiment, the first support portion includes a first support base and a first sleeve portion, the first sleeve portion connecting the first support base and a first extension portion, and one end of the spring being connected to the first support base.

[0027] In one embodiment, the first spring seat and / or the second spring seat are non-metallic components.

[0028] Secondly, this application provides a brake master cylinder, comprising: a cylinder body, at least one piston and the aforementioned spring assembly, wherein the piston extends into the cylinder body and is slidably connected to the cylinder body, and the spring assembly is disposed in a cavity formed by the piston and the cylinder body to restrict the movement of the piston.

[0029] It is understood that the brake master cylinder provided in the second aspect of this application, since it adopts the spring assembly provided in the first aspect of this application, also possesses all the beneficial effects that may be present in the embodiments provided in the first aspect of this application.

[0030] In this embodiment, by providing clearance channels in the first spring seat and / or the second spring group, at least one of the spring groups can be nested within the other spring seat, reducing the overall volume of the spring assembly. This prevents the spring size from being limited by the excessive size of the assembly when the size of the brake master cylinder is fixed, thus ensuring the pedal rebound effect. Furthermore, ensuring the rebound effect does not increase the overall size of the spring assembly, which in turn increases the size of the brake master cylinder. This solution is beneficial for optimizing the spatial layout of the brake master cylinder and for miniaturizing the brake master cylinder design and controlling costs.

[0031] In one embodiment, one of the first spring seat and the second spring seat is connected to the piston, and the other is connected to the bottom wall of the cylinder.

[0032] In one embodiment, the bottom wall of the cylinder is integrally formed with the cylinder body.

[0033] Thirdly, this application also provides a braking assembly for a vehicle including the spring assembly and / or brake master cylinder provided in any of the above embodiments.

[0034] It is understood that the vehicle provided in the third aspect of this application, due to the use of the spring assembly provided in the first aspect of this application and / or the brake master cylinder provided in the second aspect of this application, also possesses all the beneficial effects that may be present in the embodiments provided in the first and second aspects of this application.

[0035] Fourthly, this application also provides a vehicle that includes the spring assembly, master cylinder and / or brake assembly provided in any of the above embodiments, wherein the master cylinder is used to brake the wheels.

[0036] It is understood that the vehicle provided in the third aspect of this application, by employing the spring assembly provided in the first aspect of this application, the brake master cylinder provided in the second aspect, and / or the brake assembly provided in the third aspect, also possesses all the beneficial effects that may be present in the embodiments provided in the first, second, and third aspects of this application. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments 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 based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of a spring assembly provided in one embodiment of this application;

[0039] Figure 2 This is a schematic diagram of the structure of the first spring seat provided in one embodiment of this application;

[0040] Figure 3 This is a side view of the first spring seat provided in one embodiment of this application;

[0041] Figure 4 This is a schematic diagram of the structure of the second spring seat provided in one embodiment of this application;

[0042] Figure 5This is a side view of the second spring seat provided in one embodiment of this application;

[0043] Figure 6 This is a schematic diagram of the brake master cylinder provided in one embodiment of this application.

[0044] Icon labels:

[0045] 100-First spring seat, 101-First clearance channel, 102-First support part, 103-First extension part, 104-First opening, 1021-First support base, 1022-First socket part, 1031-First sub-extension part, 1032-First connecting part;

[0046] 200-Second spring seat, 201-Second clearance space, 202-Second support part, 203-Second extension part, 204-Second opening, 205-Second gap, 2021-Second sub-support part, 2031-Second sub-extension part, 2032-Second connecting part;

[0047] 300-Spring;

[0048] 400 - Spring assembly, 500 - Piston, 600 - Cylinder block, 700 - Brake master cylinder. Detailed Implementation

[0049] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0050] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. The component designations used herein, such as "first," "second," etc., are merely for distinguishing the described objects and do not have any sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). Directional terms used in this application, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," "side," etc., are merely for reference to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate or imply that the referred device or element 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.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" 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; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising," "may include," "include," or "may include" used in this application indicate the presence of the corresponding disclosed function, operation, element, etc., and do not limit one or more other functions, operations, elements, etc. Moreover, the terms "comprising" or "include" indicate the presence of the corresponding features, number, steps, operations, elements, components, or combinations thereof disclosed in the specification, but do not exclude the presence or addition of one or more other features, number, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusion.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0053] Understandably, the braking assembly of this application can be applied to a vehicle. The vehicle may include a pedal, a braking assembly, a brake, and wheels. The pedal is connected to the input end of the braking assembly and is used to transmit the pedal force provided by the driver to the braking assembly, while the braking assembly provides the driver with foot feel. The brake is connected to the output end of the braking assembly and is fixed to the wheel end of the vehicle. The output end of the braking assembly may include a mechanical output end and an electronic output end. That is, the braking assembly of this application has both mechanical and electric braking functions. The brake is used to transmit the braking force or braking signal generated by the braking assembly to the wheels to achieve deceleration or braking. It should be noted that the vehicle provided in this application can be a pure electric vehicle or a hybrid vehicle.

[0054] Please refer to the above. Figures 1-5 ,in Figure 1 This is a schematic diagram of the structure of the spring assembly 400 provided in one embodiment of this application; Figure 2 and Figure 3 This is a schematic diagram and a side view of the first spring seat 100 provided in one embodiment of this application; Figure 4 and Figure 5This is a schematic diagram and a side view of the second spring seat 200 provided in one embodiment of this application.

[0055] See Figure 1 In one embodiment, the spring assembly 400 of this application includes a first spring seat 100, a second spring seat 200, and a spring 300. The two ends of the spring 300 are respectively connected to the first spring seat 100 and the second spring seat 200. The spring 300 is sleeved on at least one of the first spring seat 100 and the second spring seat 200, that is, the first spring seat 100 and the second spring seat 200 form a length in the axial direction of the spring 300, so that the spring 300 is sleeved on at least one spring seat. Since the first spring seat 100 and the second spring seat 200 are nested in each other in the axial direction of the spring, the spring 300 can be sleeved on both spring seats simultaneously, or partially sleeved on the first spring seat 100 and partially sleeved on the second spring seat 200. At least one of the first spring seat 100 and the second spring seat 200 is provided with a clearance channel, so that the opposite spring seat can be at least partially accommodated within the clearance channel, reducing the overall volume of the spring assembly 400 and lowering the cost.

[0056] See Figure 2 and Figure 3 In one embodiment, the first spring seat 100 is provided with a first clearance channel 101, and at least a portion of the second spring seat 200 is housed within the first clearance channel 101. When the spring 300 is compressed, at least a portion of the second spring seat 200 moves relative to the first spring seat 100 within the first clearance channel 101 along the axial direction of the spring.

[0057] See Figure 4 and Figure 5 In one embodiment, the second spring seat 200 is provided with a second clearance channel 201, and at least a portion of the first spring seat 100 is housed in the second clearance channel 201. When the spring 300 is compressed, at least a portion of the first spring seat 100 moves relative to the second spring seat 200 in the axial direction of the spring within the second clearance channel 201.

[0058] In one embodiment, the first spring seat 100 and the second spring seat 200 are respectively provided with a first clearance channel 101 and a second clearance channel 201. The first spring seat 100 and the second spring seat 200 are nested to each other, that is, the first spring seat 100 is at least partially housed in the second clearance channel 201, and the second spring seat 200 is at least partially housed in the first clearance channel 101. The first spring seat 100 and the second spring seat 200 overlap at least partially in multiple radial directions, reusing the space in the radial direction, thereby reducing the overall volume of the spring assembly 400. At the same time, in this way, the spring 300 is preloaded and limited in the axial direction.

[0059] Specifically, the first spring seat 100 includes a first support portion 102 and a first extension portion 103 connected to each other, and the second spring seat 200 includes a second support portion 202 and a second extension portion 203 connected to each other. The two ends of the spring 300 are respectively connected to the first support portion 102 and the second support portion 202. The first extension portion 103 forms a first clearance channel 101, and the second spring seat 200 is at least partially received in the first clearance channel 101; the second extension portion 203 forms a second clearance channel 201, and the first spring seat 100 is at least partially received in the second clearance channel 201.

[0060] It is understood that the first extension 103 and the second extension 203 form a nested structure that at least partially overlaps in axial length and in multiple radial directions, thereby creating space reuse to reduce the volume of the spring assembly 400.

[0061] In one embodiment, in a plane at least partially passing through the spring axis, the projections of the first extension 103 and the second extension 203 at least partially coincide in the radial direction of the spring, thus forming spatial reuse in the radial direction. Alternatively, in the circumferential direction of the spring, portions of the first extension 103 and the second extension 203 are spaced apart to form a staggered distribution in the circumferential direction, thereby achieving radial space utilization or a reduction in overall space, and limiting the spring 300 to ensure that it reaches the required preload.

[0062] In one specific embodiment, the first clearance channel 101 has a first opening 104, and the second clearance channel 201 has a second opening 204. The opening direction of the first opening 104 and the opening direction of the second opening 204 are perpendicular to the axial direction of the spring, respectively. Alternatively, the opening direction of the first opening 104 and the opening direction of the second opening 204 may intersect. Specifically, the intersection of the two opening directions means that they form an angle, which can be movable or fixed.

[0063] In one embodiment, the first extension 103 includes a first connecting portion 1032 and at least two first sub-extensions 1031, with both ends of the at least two first sub-extensions 1031 connected to the first connecting portion 1032 and the first support portion 102, respectively. A first clearance channel 101 is formed between the at least two first sub-extensions 1031. The second extension 203 includes a second connecting portion 2032 and at least two second sub-extensions 2031, with both ends of the at least two second sub-extensions 2031 connected to the second connecting portion 2032 and the second support portion 202, respectively. A second clearance channel 201 is formed between the at least two second sub-extensions 2031.

[0064] Specifically, at least a part of the first connecting portion 1032 is received in the second avoidance channel 201, and at least a part of the second connecting portion 2032 is received in the first avoidance channel 101.

[0065] Furthermore, the length of the first connecting portion 1032 is greater than the width of the second connecting portion 2032, and the length of the second connecting portion 2032 is greater than the width of the first connecting portion 1032. The length and width in this embodiment can be relative concepts, which respectively represent the dimensions of the two ends with longer dimensions and the two ends with shorter dimensions in the first connecting portion 1032 or the second connecting portion 2032. In an embodiment where a connecting portion connects two oppositely arranged sub-extension portions, the distance between the two ends of the connecting portion connecting the sub-extension portions is the length of the connecting portion, and the maximum dimension perpendicular to the length direction of the connecting portion is the width. The above setting method helps the two connecting portions to form the maximum displacement when moving relative to each other in the corresponding avoidance space. That is, when the spring assembly 400 is stretched to the maximum length, the first connecting portion 1032 and the second connecting portion 2032 can contact each other, so as to make full use of the space in the axial direction and realize the limitation of the spring 300 to ensure that it reaches the required pre-tightening force.

[0066] It can be understood that at least one of the first spring seat 100 and the second spring seat 200 forms an opening at one end away from the other, and the opening communicates with its avoidance channel to facilitate the installation of the spring seat.

[0067] In one embodiment, the second support portion 202 includes at least two second sub-support portions 2021. Each second sub-extension portion 2031 is connected to a second sub-support portion 2021, and a second gap 205 is formed between the second sub-support portions 2021. The second gap 205 communicates with the second avoidance channel 201. The above opening is formed in the second gap 205. The second spring seat 200 can enable a second sub-extension portion 2031 to pass through the first avoidance channel 101, so that the second connecting portion 2032 is disposed through the first avoidance channel 101, facilitating the installation of the spring assembly 400.

[0068] Specifically, when there are two second sub-extension portions 2031, the two second sub-extension portions 2031 are oppositely arranged, making the second spring seat 200 in a "C" shape, and the two sub-extension portions are respectively located on both sides of the first spring seat 100.

[0069] In some embodiments, the first support portion 102 can be an integral support block. In other embodiments, the first support portion 102 also includes a plurality of first sub-support portions. The first sub-support portions are circumferentially distributed along the first support portion 102, and a first gap is formed by the first sub-support portions. The first gap may not communicate with the first avoidance channel 101, and this gap is only used to reduce the material used for the support portion to reduce the component cost.

[0070] In another embodiment, the first support portion 102 includes a first support base 1021 and a first sleeve portion 1022. The first support base 1021 is used for contact at the installation position, and the first sleeve portion 1022 connects the first support base 1021 and the first extension portion 103. One end of the spring 300 is connected to the first support base 1021.

[0071] In one embodiment, the first spring seat 100 and / or the second spring seat 200 are non-metallic parts, such as plastic injection molded parts. The non-metallic spring seat contacts the metallic parts (piston, cylinder, etc.), making it less likely to produce abnormal noise. Furthermore, the non-metallic spring seat acts as a limiting element, limiting the spring and reducing the possibility of abnormal noise caused by friction between the spring and the piston.

[0072] In one embodiment, the length g of the first spring seat in the axial direction is greater than the solid height of the spring, which refers to the actual or theoretical height of the helical compression spring when all coils are in contact.

[0073] In one embodiment, the length h of the first clearance channel 101 in the axial direction of the spring and / or the length H of the second clearance channel 201 in the axial direction of the spring are greater than the stroke of the spring (the distance by which the spring can stretch or shorten after being subjected to force).

[0074] In one embodiment, the length of the first clearance channel 101 in the axial direction of the spring is not greater than the length of the first spring seat in the axial direction of the spring.

[0075] Please refer to the above. Figure 6 ,in Figure 6 This is a cross-sectional structural schematic diagram of the braking assembly 200 provided in another embodiment of this application.

[0076] In one embodiment, the brake master cylinder 700 of this application includes a cylinder body 600, at least one piston 500, and the aforementioned spring assembly 400. The piston 500 extends into the cylinder body 600 and is slidably connected to it. The spring assembly 400 is disposed within the cavity formed by the piston 500 and the cylinder body 600 to restrict the movement of the piston 500. When the driver depresses the pedal, the piston 500 moves axially relative to the cylinder body 600 toward the end away from the pedal, compressing the fluid in the cylinder body 600 to increase the pressure within it. Simultaneously, the piston 500 also provides a reaction force to the pedal, providing the driver with a feel. When the driver releases the pedal, the piston 500 moves axially relative to the cylinder body 600 toward the end closer to the pedal, returning to its original position to release pressure from the cylinder body 600.

[0077] By providing clearance channels in the first spring seat 100 and / or the second spring group of the elastic component in the master cylinder, at least one spring group can be nested in the other spring seat, reducing the volume of the entire spring assembly 400. This prevents the spring size from being limited by the excessive size of the assembly, thus ensuring the pedal rebound effect. This solution is beneficial for optimizing the spatial layout of the brake master cylinder 700 and for miniaturizing the brake master cylinder 700.

[0078] Understandably, one of the first spring seat 100 and the second spring seat 200 is connected to the piston 500, and the other is connected to the bottom wall of the cylinder 600. Optionally, a shim may also be provided inside the cylinder, positioned between the spring assembly and the inner wall of the cylinder and / or the piston, to improve assembly accuracy.

[0079] In one embodiment, the bottom wall of the cylinder block 600 is integrally formed with the cylinder block 600, eliminating the method of sealing the rear hole of the main cylinder with components such as the rear cover, fixing sleeve, and O-ring, reducing the number of components and processing steps, improving assembly speed, reducing costs, and avoiding leakage caused by the rear cover of the main cylinder.

[0080] In one embodiment, the braking assembly of this application includes the brake master cylinder 700 and / or spring assembly 400 of the above embodiments. Based on the solutions of the above embodiments, the braking assembly can be made smaller.

[0081] It should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments, and making equivalent changes according to the claims of this application, still falls within the scope of this application.

Claims

1. A spring assembly (400), characterized in that, include: A first spring seat (100), a second spring seat (200), and a spring (300); the two ends of the spring (300) are respectively connected to the first spring seat (100) and the second spring seat (200), and the spring (300) is sleeved on at least one of the first spring seat (100) and the second spring seat (200); The first spring seat (100) is provided with a first clearance channel (101) so that at least a portion of the second spring seat (200) moves relative to the first spring seat (100) within the first clearance channel (101) along the axial direction of the spring (300); and / or, The second spring seat (200) is provided with a second clearance channel (201) so that at least a portion of the first spring seat (100) moves relative to the second spring seat (200) in the second clearance channel (201) along the axial direction of the spring (300).

2. The spring assembly (400) according to claim 1, characterized in that, The first spring seat (100) includes a first support portion (102) and a first extension portion (103) connected to each other. The first extension portion (103) forms the first clearance channel (101). The second spring seat (200) is at least partially received in the first clearance channel (101). The second spring seat (200) includes a second support portion (202) and a second extension portion (203) connected to each other. The second extension portion (203) forms a second clearance channel (201). The first spring seat (100) is at least partially received in the second clearance channel (201). The two ends of the spring (300) are connected to the first support part (102) and the second support part (202), respectively.

3. The spring assembly (400) according to claim 2, characterized in that, In a plane that passes at least partially through the axis of the spring (300), the projection of the first extension (103) and the projection of the second extension (203) at least partially coincide in the radial direction of the spring, and / or, in the circumferential direction of the spring (300), a portion of the first extension (103) and a portion of the second extension (203) are spaced apart.

4. The spring assembly (400) according to claim 2, characterized in that, The first clearance passage (101) has a first opening (104), and the second clearance passage (201) has a second opening (204). The opening direction of the first opening (104) and the opening direction of the second opening (204) are perpendicular to the axial direction of the spring (300); and / or, the opening direction of the first opening (104) intersects the opening direction of the second opening (204).

5. The spring assembly (400) according to claim 2, characterized in that, The first extension (103) includes a first connecting part (1032) and at least two first sub-extensions (1031), the two ends of the at least two first sub-extensions (1031) are respectively connected to the first connecting part (1032) and the first support part (102), and the first clearance channel (101) is opened between the at least two first sub-extensions (1031); The second extension (203) includes a second connecting part (2032) and at least two second sub-extensions (2031), the two ends of the at least two second sub-extensions (2031) are respectively connected to the second connecting part (2032) and the second support part (202), and the second clearance channel (201) is opened between the at least two second sub-extensions (2031).

6. The spring assembly (400) according to claim 5, characterized in that, The first sub-extension (1031) and the second sub-extension (2031) are spaced apart in the circumferential direction of the spring (300).

7. The spring assembly according to claim 5, characterized in that, The spring assembly satisfies at least one of the following: The length of the first connecting part (1032) is greater than the width of the second connecting part (2032), and the length of the second connecting part (2032) is greater than the width of the first connecting part (1032); The length of the first spring seat in the axial direction is greater than the compression height of the spring; The length of the first clearance channel (101) and / or the second clearance channel (201) in the axial direction of the spring is greater than the stroke of the spring; The length of the first clearance channel (101) in the axial direction of the spring is not greater than the length of the first spring seat in the axial direction of the spring.

8. The spring assembly (400) according to claim 5, characterized in that, At least a portion of the first connecting part (1032) is housed within the second clearance channel (201), and at least a portion of the second connecting part (2032) is housed within the first clearance channel (101).

9. The spring assembly (400) according to claim 5, characterized in that, The second support (202) includes at least two second sub-supports (2021), each second sub-extension (2031) is connected to a second sub-support (2021), and a second gap (205) is formed between the second sub-supports (2021), the second gap (205) communicating with the second clearance channel (201).

10. The spring assembly (400) according to claim 2, characterized in that, The first support portion (102) includes a plurality of first sub-support portions, which are distributed circumferentially along the first support portion (102) and form a first gap between the first sub-support portions.

11. The spring assembly (400) according to claim 2, characterized in that, The first support portion (102) includes a first support base (1021) and a first sleeve portion (1022), the first sleeve portion (1022) connects the first support base (1021) and the first extension portion (103), and one end of the spring (300) is connected to the first support base (1021).

12. The spring assembly (400) according to any one of claims 1-11, characterized in that, The first spring seat (100) and / or the second spring seat (200) are non-metallic parts.

13. A brake master cylinder (700), characterized in that, include: The cylinder (600), at least one piston (500), and a spring assembly (400) as described in any one of claims 1-11, wherein the piston (500) extends into and is slidably connected to the cylinder (600), and the spring assembly (400) is disposed in the cavity formed by the piston (500) and the cylinder (600) to restrict the movement of the piston (500).

14. The brake master cylinder (700) according to claim 13, characterized in that, One of the first spring seat (100) and the second spring seat (200) is connected to the piston (500), and the other is connected to the bottom wall of the cylinder (600).

15. The brake master cylinder (700) according to claim 13, characterized in that, The bottom wall of the cylinder (600) is integrally formed with the cylinder (600).

16. A braking assembly, characterized in that, Includes the spring assembly (400) as described in any one of claims 1-12, and / or the brake master cylinder (700) as described in any one of claims 13-15.

17. A vehicle, characterized in that, Includes the spring assembly (400) as described in any one of claims 1-12, or the brake master cylinder (700) as described in any one of claims 13-15, or the brake assembly as described in claim 16.

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