Shock absorber, suspension system and vehicle

Abstract

The utility model provides a shock absorber, a suspension system and a vehicle, the shock absorber comprises a first component, a second component and a sensing element, and the second component is movably arranged relative to the first component in the axial direction. The sensing element comprises a detection ruler and a reading head, the detection ruler is arranged on the second component and fixed relative to the second component, the detection ruler comprises a plurality of magnetic units arranged in the axial direction, the reading head is arranged on the first component and fixed relative to the first component, and the reading head is used for sensing the magnetic units. According to the shock absorber, the detection ruler composed of the multiple magnetic units arranged in the axial direction is adopted, the arrangement space of the sensing elements can be reduced, the sensing elements can be arranged at multiple positions on the shock absorber, and flexible arrangement of the shock absorber and the sensing elements is facilitated.

Description

[0001] This application claims priority to the Chinese patent application No. 202311868134.0, filed on December 29, 2023, and entitled “Shock absorber, suspension system and vehicle”, the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates generally to the technical field of shock absorbers, and more particularly to a shock absorber, a suspension system and a vehicle. BACKGROUND

[0003] At present, the displacement sensor of the existing shock absorber occupies a large space, and the installation position of the sensor on the shock absorber is limited, which is not conducive to the arrangement of the shock absorber and the sensor. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and essential technical features of the claimed technical solutions, nor to determine the protection scope of the claimed technical solutions.

[0005] To at least partially solve the above problems, the first aspect of the present application provides a shock absorber, comprising:

[0006] a first member;

[0007] a second member movably arranged relative to the first member along an axial direction; and

[0008] a sensing element, the sensing element comprising a detection ruler and a reading head, the detection ruler being arranged on and fixed relative to the second member, the detection ruler comprising a plurality of magnetic units arranged along the axial direction, the reading head being arranged on and fixed relative to the first member, the reading head being configured to sense the magnetic units.

[0009] According to the shock absorber of the first aspect of the present application, when the second member moves relative to the first member, the detection ruler and the reading head move relatively, and each magnetic unit is sensed by the reading head, so that the displacement of the second member relative to the first member can be detected correspondingly. In addition, the detection ruler composed of a plurality of magnetic units arranged along the axial direction can reduce the arrangement space of the sensing element, so that the sensing element can be arranged at multiple positions on the shock absorber, which is conducive to the flexible arrangement of the shock absorber and the sensing element.

[0010] Optionally, the length dimension of the magnetic units in the circumferential direction of the first member is different.

[0011] Optionally, the length of the magnetic unit gradually increases or decreases along the axial direction.

[0012] Optionally, each of the magnetic units is aligned on one side or centered along the circumferential direction of the first member.

[0013] Optionally, the magnetic unit is provided with a first detection arc surface, and the read head is provided with a second detection arc surface matched with the first detection arc surface.

[0014] Optionally, the axis of the first detection arc surface coincides with the axis of deflection of the second member relative to the first member; and the axis of the second detection arc surface coincides with the axis of deflection of the second member relative to the first member.

[0015] Optionally, the first member is a housing provided with a receiving cavity, and at least part of the second member is arranged in the receiving cavity.

[0016] The first member is provided with a protruding portion provided with a through hole in communication with the receiving cavity, and the second member is provided with an extending portion extending out of the first member through the through hole.

[0017] The read head is arranged on the protruding portion, and the detection scale is arranged on the extending portion.

[0018] Optionally, the detection scale is arranged on a mounting bracket, at least one end of the mounting bracket is shaped into a T-shaped end, and the T-shaped end is connected to the extending portion by a fastener.

[0019] The second aspect of the present application provides a suspension system comprising the shock absorber according to the above.

[0020] According to the suspension system of the second aspect of the present application, the shock absorber of the suspension system can detect the displacement amount by the sensing element, and the arrangement of the shock absorber and the sensing element is more flexible.

[0021] The third aspect of the present application provides a vehicle comprising:

[0022] a vehicle body;

[0023] a wheel provided with a lower wishbone; and

[0024] the shock absorber according to the above, the first member is connected to the lower wishbone, and the second member is connected to the vehicle body.

[0025] According to the vehicle of the third aspect of the present application, the shock absorber is convenient to arrange, which is beneficial to improve the chassis arrangement of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0026] The following drawings for the embodiments of the present application are hereby incorporated into this application as part of the present application for the purpose of understanding the present application. The embodiments of the present application and their description in the drawings serve to explain the principles of the present application. In the drawings,

[0027] Figure 1 Schematic diagram of a damper according to a preferred embodiment of the present application;

[0028] Figure 2 Schematic diagram of a damper according to a preferred embodiment of the present application; Figure 1 Schematic diagram of a cross section of a damper according to a preferred embodiment of the present application in an axial direction;

[0029] Figure 3 Schematic diagram of a structure of a scale and a read head according to a preferred embodiment of the present application; Figure 1 Schematic diagram of a scale and a read head according to a preferred embodiment of the present application in a direction A.

[0030] Figure 4 Schematic diagram of a scale and a read head according to a preferred embodiment of the present application in a direction A. Figure 3 Schematic diagram of a scale and a read head according to a preferred embodiment of the present application in a direction A.

[0031] Explanation of reference numerals

[0032] 100 - lower fork arm; 110 - first member;

[0033] 111 - housing; 112 - mover;

[0034] 120 - second member; 121 - central shaft;

[0035] 122 - stator; 113 - protrusion;

[0036] 123 - extension; 130 - scale;

[0037] 131 - magnetic stripe; 132 - first detection camber;

[0038] 140 - read head; 141 - second detection camber;

[0039] 150 - mounting bracket; 151 - T-shaped end;

[0040] D1 - axial direction; D2 - circumferential direction. DETAILED DESCRIPTION

[0041] In the following description, numerous specific details are given to provide a thorough understanding of the application. However, it will be apparent that the application can be practiced without one or more of the specific details. In other instances, well-known features are not described in detail in order to avoid obscuring the application. Accordingly, the specification and drawings are to be regarded in an illustrative, rather than a restrictive, sense.

[0042] In this document, ordinal numbers such as "first" and "second" cited in the present application are merely identifiers and have no other meaning, such as a specific order, etc. Moreover, the term "first component" does not imply, by itself, the existence of a "second component" and the term "second component" does not imply, by itself, the existence of a "first component".

[0043] In this document, "upper", "lower", "front", "rear", "left", "right" and the like are used to indicate relative positions between the relevant parts, rather than to limit the absolute positions of the relevant parts.

[0044] In this document, "equal", "same" and the like are not strictly limited in the mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and allowed by manufacturing or use, etc.

[0045] Unless otherwise stated, numerical ranges herein are inclusive of the entire range and also of several sub-ranges within the entire range.

[0046] Figures 1 to 4 A damper according to the present application is shown, which comprises a first member 110, a second member 120 and a sensing element. The second member 120 is movably arranged relative to the first member 110 along an axial direction D1. The sensing element comprises a detection scale 130 and a read head 140. The detection scale 130 is arranged on the second member 120 and fixed relative to the second member 120, and comprises a plurality of magnetic units arranged along the axial direction D1. The read head 140 is arranged on the first member 110 and fixed relative to the first member 110, and is configured to sense the magnetic units.

[0047] According to the damper of the present application, when the second member 120 moves relative to the first member 110, the detection scale 130 and the read head 140 move accordingly, and each magnetic unit is sensed by the read head 140, so that the displacement of the second member 120 relative to the first member 110 can be detected correspondingly. In addition, the detection scale 130 composed of a plurality of magnetic units arranged along the axial direction D1 can reduce the arrangement space of the sensing element, so that the sensing element can be arranged at multiple positions on the damper, which is conducive to the flexible arrangement of the damper and the sensing element.

[0048] Referring to Figure 3 , the detection scale 130 comprises a plurality of magnetic units arranged along the axial direction D1, and the magnetic strength of each magnetic unit is different. As shown in Figure 3 , the detection scale 130 is a single channel, i.e. a single magnetic unit comprises a magnetic stripe 131.

[0049] Therefore, when the reading head 140 moves to different magnetic units along the axial direction D1, the magnetic strength of the magnetic units sensed by the reading head 140 is different, so that the displacement of the detection ruler 130 relative to the reading head 140 can be determined according to the difference in the magnetic strength sensed by the reading head 140, and the position of the second member 120 relative to the first member 110 along the axial direction D1 can be determined.

[0050] Optionally, the thickness of each magnetic unit is consistent, and the area is different, so that the magnetic strength of each magnetic unit is different. The magnetic unit can be a neodymium iron boron material magnet, so that the magnetic unit has sufficient coercive force and can be adapted to a more complex magnetic field environment and is not easy to be disturbed. In addition, the magnetic unit can be a neodymium iron boron material magnet, which can provide sufficient magnetic field for the reading head 140 to perceive, so that there is a larger arrangement gap between the reading head 140 and the detection ruler 130, preventing contact and friction between the reading head 140 and the detection ruler 130, and the performance is more stable.

[0051] Optionally, the length dimension of the magnetic unit along the circumferential direction D2 of the first member 110 is different, so that the magnetic strength of each magnetic unit of the detection ruler 130 is different. Optionally, referring to Figure 3 , along the axial direction D1, the length dimension of the magnetic unit gradually increases or decreases, facilitating the setting of the corresponding relationship between the magnetic strength of the magnetic unit and the displacement of the second member 120 relative to the first member 110.

[0052] Further, referring to Figure 3 , along the circumferential direction D2 of the first member 110, each magnetic unit is aligned on one side. Each magnetic unit is arranged in a one-sided alignment manner, facilitating installation and positioning. Alternatively, along the circumferential direction D2 perpendicular to the axial direction D1, each magnetic unit can also be aligned in the center, so that the sensing accuracy of the reading head 140 is higher. In particular, along the circumferential direction D2, the reading head 140 is generally arranged at the middle of the magnetic unit. On the basis of ensuring that the reading head 140 does not deviate from the magnetic unit, the detection ruler 130 can be deflected by a larger angle relative to the reading head 140, so that the shock absorber according to the present application has better stability.

[0053] It can be understood that each magnetic unit does not necessarily be arranged in order along the axial direction D1 according to the size of the magnetic strength (such as the embodiment of Figure 3 ), and the arrangement of each magnetic unit can also be irregular, and only the difference in the magnetic strength of the magnetic unit sensed by the reading head 140 can be used to sense the distance of the second member 120 relative to the first member 110.

[0054] Likewise, the read head 140 may also calculate the velocity and acceleration of the second component 120 relative to the first component 110 along the axial direction D1 through the displacement time and displacement value of the second component 120 relative to the first component 110 along the axial direction D1.

[0055] Optionally, the magnetic unit is provided with a first detection arc surface 132 , and the read head 140 is provided with a second detection arc surface 141 matching the first detection arc surface 132 , so that the sensing element is not easily affected by the relative deflection between the first component 110 and the second component 120 .

[0056] Further, combined with Figure 4 As shown, the axis of the first detection arc 132 coincides with the axis of deflection of the second member 120 relative to the first member 110. The axis of the second detection arc 141 coincides with the axis of deflection of the second member 120 relative to the first member 110. When the second member 120 deflects relative to the first member 110, the spacing between the read head 140 and the detection scale 130 remains unchanged due to the arrangement of the first detection arc 132 and the second detection arc 141. Therefore, within a certain deflection range, the magnetic intensity of the detection scale 130 sensed by the read head 140 remains unchanged, and thus the deflection of the second member 120 relative to the first member 110 does not affect the sensing of the read head 140.

[0057] Specifically, the mounting between the measuring ruler 130 and the second member 120 is performed. A groove (not shown) is defined in the sidewall of the second member 120. The vibration damper according to the present application also includes a mounting bracket 150. The mounting bracket 150 is disposed within the groove, and the measuring ruler 130 is secured to the mounting bracket 150. The mounting bracket 150 is secured to the second member 120 via fasteners, thereby enabling the mounting of the measuring ruler 130 and facilitating assembly, disassembly, and commissioning.

[0058] Further, refer to Figure 3 , at least one end of the mounting bracket 150 (such as Figure 3 The upper end of the mounting bracket 150 is formed with a T-shaped end 151, which is connected to the second member 120 via fasteners. The provision of the T-shaped end 151, and in particular the fasteners disposed at both ends of the T-shaped end 151, makes the mounting bracket 150 and the detection ruler 130 more stable.

[0059] Specifically, the structures of the first component 110 and the second component 120 are described.

[0060] The first component 110 is a housing 111 provided with a receiving cavity in which a mover 112 is fixed. The housing 111 is provided with a protrusion 113 provided with a through hole in communication with the receiving cavity. The second component 120 includes a central shaft 121 and a stator 122, the central shaft 121 is provided with an extension 123 extending to the outside of the first component 110 through the through hole. The stator 122 is arranged on the central shaft 121 and located in the housing 111, and the stator 122 and the mover 112 have magnetic properties. Through the magnetic properties between the stator 122 and the mover 112, the shock absorber according to the application can be powered, so that the shock absorber as a whole has an active adjustment function.

[0061] In detail, the mover 112 is a magnetic body or a power coil, and the stator 122 is a magnetic body or a power coil. Preferably, the mover 112 is a magnetic body, for example, a magnetic body made of various magnetic materials (neodymium iron boron permanent magnet material, etc.). The stator 122 is a power coil, and the stator 122 generates a magnetic field when connected to electricity, and moves relative to the mover 112 in the axial direction D1 through the magnetic field effect. Further, the stator 122 is sleeved on the end of the central shaft 121 penetrating into the housing 111 and fixed with the central shaft 121, and the mover 112 is fixed to the inner side wall of the housing 111 and sleeved on the stator 122. Therefore, by adjusting the current strength and direction flowing into the stator 122, the moving direction and size of the central shaft 121 relative to the housing 111 (or the housing 111 relative to the central shaft 121) can be controlled.

[0062] Further, the mounting bracket 150 is mounted to the extension 123, that is, the detection ruler 130 is arranged on the extension 123, and the reading head 140 is arranged on the protrusion 113, which facilitates the installation of the sensing element, and the sensing element is arranged outside the first component 110, which can prevent the sensing element from being interfered by the magnetic field between the first component 110 and the second component 120, and prevent the detection ruler 130 from demagnetization.

[0063] The application also provides a suspension system including the shock absorber according to the above. The suspension system according to the application has a shock absorber that can detect the displacement amount through the sensing element, and the arrangement of the shock absorber and the sensing element is more flexible.

[0064] The vehicle according to the present application comprises a vehicle body, a wheel and a damper according to the above. The wheel is provided with a lower wishbone 100. The first member 110 is connected to the lower wishbone 100, and the second member 120 is connected to the vehicle body. The vehicle according to the present application has the damper which is convenient to arrange, and is beneficial to improve the chassis arrangement of the vehicle. In addition, when the partial working condition of the vehicle (for example, the vehicle steering roll) causes the deflection between the first member 110 and the second member 120 of the damper, the arrangement of the detection scale 130 and the reading head 140 of the damper can still accurately sense the moving stroke between the first member 110 and the second member 120.

[0065] Unless otherwise defined, 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0066] The present application has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of example and illustration, and are not intended to limit the present application to the described embodiments. Those skilled in the art can understand that more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of the present application.

Claims

1. A shock absorber, characterized in that: The shock absorber comprises: first component; a second member movably provided in an axial direction relative to the first member; and The sensing element includes a detection ruler and a reading head. The detection ruler is arranged on the second member and fixed relative to the second member. The detection ruler includes a plurality of magnetic units arranged along the axial direction. The reading head is arranged on the first member and fixed relative to the first member. The reading head is used to sense the magnetic units.

2. The shock absorber according to claim 1, characterized in that The magnetic units have different lengths along the circumferential direction of the first member.

3. The shock absorber according to claim 2, characterized in that Along the axial direction, the length dimension of the magnetic unit gradually increases or decreases.

4. The shock absorber according to claim 1, characterized in that Along the circumferential direction of the first component, the magnetic units are aligned on one side or in the center.

5. The shock absorber according to claim 1, characterized in that The magnetic unit is provided with a first detection arc surface, and the reading head is provided with a second detection arc surface matching the first detection arc surface.

6. The shock absorber according to claim 5, characterized in that The axis of the first detection arc surface coincides with the axis of deflection of the second component relative to the first component; the axis of the second detection arc surface coincides with the axis of deflection of the second component relative to the first component.

7. The shock absorber according to claim 1, characterized in that The first component is a shell provided with a receiving cavity, and at least a portion of the second component is provided in the receiving cavity; The first member is provided with a protruding portion, the protruding portion is provided with a through hole communicating with the accommodating cavity, and the second member is provided with an extending portion, the extending portion extends to the outside of the first member through the through hole; The reading head is arranged on the protruding portion, and the detecting ruler is arranged on the extending portion.

8. The shock absorber according to claim 7, characterized in that It also includes a mounting bracket, the detection ruler is arranged on the mounting bracket, at least one end of the mounting bracket is formed with a T-shaped end, and the T-shaped end is connected to the protruding portion through a fastener.

9. A suspension system, characterized in that: Comprising a vibration absorber according to any one of claims 1 to 8.

10. A vehicle, characterized in that: include: body; a wheel, wherein the wheel is provided with a lower wishbone; as well as The shock absorber according to any one of claims 1 to 8, wherein the first member is connected to the lower wishbone, and the second member is connected to the vehicle body.

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