Shock absorber and vehicle

Abstract

The utility model relates to the technical field of shock absorbers, aims to solve the problem of how to enable the shock absorber to provide larger damping force, and provides a shock absorber and a vehicle. The shock absorber comprises a cylinder barrel, a piston rod, a separation structure, a plugging piece and an elastic piece. A cavity is formed in the cylinder barrel. The piston rod is movably inserted into the cavity. The piston rod is sleeved with the partition structure, and the partition structure can divide the cavity into a first cavity and a second cavity; a first channel is arranged in the end, close to the first cavity, of the separation structure, a second channel is arranged in the end, close to the second cavity, of the separation structure, and the separation structure is further provided with an overflow hole communicated with the second channel and communicated with the second cavity. The plugging piece is provided with a first position for communicating the first channel and the second channel and a second position for blocking the first channel and the second channel. The elastic piece is arranged in the second channel and elastically abuts against the position between the separation structure and the blocking piece. The shock absorber has the beneficial effect that the shock absorber can provide larger damping force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorbers, in particular to a shock absorber and a vehicle. BACKGROUND

[0002] A shock absorber is provided in the related art, which is connected between a vehicle body and an axle to provide damping force when the vehicle encounters uneven road surface, thereby reducing the impact on the vehicle body.

[0003] However, the shock absorber in the related art provides a small damping force, and when the vehicle passes through a road surface with a large difference, the vehicle body is easily subjected to a large impact. CONTENT OF THE INVENTION

[0004] The present application provides a shock absorber and a vehicle to solve the problem of how to enable the shock absorber to provide greater damping force.

[0005] According to one aspect of the present application, a shock absorber is provided, comprising a cylinder, a piston rod, a partition structure, a blocking member and an elastic member. The cylinder is provided with a chamber. The piston rod is movably inserted into the chamber. The partition structure is sleeved on the piston rod and can move with the piston rod in the chamber. The partition structure can divide the chamber into a first chamber and a second chamber. The partition structure is provided with a first passage at one end close to the first chamber and a second passage at one end close to the second chamber. The first passage and the second passage are in communication along the axial direction. The partition structure is further provided with an overflow hole in communication with the second passage. The overflow hole is in communication with the second chamber. The blocking member is movably arranged in the second passage. The blocking member has a first position in communication with the first passage and the second passage, and a second position blocking the first passage and the second passage. The elastic member is arranged in the second passage and elastically abuts between the partition structure and the blocking member.

[0006] The above shock absorber, the hydraulic pressure in the first chamber pushes the blocking member to move away from the first passage after overcoming the elastic force of the elastic member, thereby switching from the second position to the first position, i.e. in communication with the first passage and the second passage, so that the liquid in the first chamber can enter the second passage through the first passage, and then flow into the second chamber through the overflow hole, forming hydraulic damping, so that the shock absorber can provide greater damping force, thereby reducing the impact on the vehicle body when the vehicle passes through a road surface with a large difference.

[0007] In one of the embodiments, the partition structure comprises a shell and an abutment, the shell is sleeved on the piston rod, the abutment is protruded on the inner circumferential wall of the shell at the end close to the first cavity, and the abutment is arranged around the shell; the abutment and the piston rod are arranged radially apart to define the first channel between the abutment and the piston rod; the side of the shell away from the abutment is provided with the second channel in the direction from the first cavity to the second cavity. The blocking member is movably sleeved on the piston rod, and in the second position, the blocking member abuts against the side of the abutment close to the second channel in the axial direction to block the first channel and the second channel. The elastic member abuts against the side of the blocking member away from the abutment in the axial direction, and the elastic member is located in the shell.

[0008] In one of the embodiments, the elastic member is sleeved on the piston rod.

[0009] In one of the embodiments, the overflow hole is a plurality of overflow holes, and the plurality of overflow holes are distributed apart from each other on the side of the partition structure.

[0010] In one of the embodiments, the partition structure comprises a shell and a sealing ring. The shell is sleeved on the piston rod and is provided with the first channel and the second channel respectively. The sealing ring is sleeved on the shell and can be sealingly connected between the outer circumferential wall of the shell and the inner circumferential wall of the chamber to divide the chamber into the first cavity and the second cavity.

[0011] In one of the embodiments, the shell comprises a first shell and a second shell arranged in the axial direction, and the sealing ring is sleeved on the first shell. The first shell is in a cylindrical shape. The second shell comprises a cylindrical wall and a bottom wall, one end of the cylindrical wall is connected to the end of the first shell away from the first cavity, the bottom wall is connected to the end of the cylindrical wall away from the first shell, and the overflow hole is arranged on the cylindrical wall.

[0012] In one of the embodiments, the cylinder comprises an outer cylinder and an inner cylinder. The outer cylinder has a first part and a second part connected in the axial direction. The inner cylinder is arranged in the first part and defines the chamber.

[0013] In one of the embodiments, the inner cylinder comprises a fitting part and a guide part connected in the axial direction, and the guide part is located at the end of the fitting part close to the second part. In the direction from the first cavity to the second cavity, the inner diameter of the guide part gradually increases.

[0014] In one of the embodiments, the shock absorber further comprises a guide connected to the end of the cylinder close to the first cavity. The piston rod passes through the guide and extends into the chamber.

[0015] According to another aspect of the present application, a vehicle is provided, comprising the shock absorber according to any one of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view of a vehicle according to one embodiment of this application.

[0018] Figure 2 for Figure 1 A partial structural schematic diagram of the vibration damper in the illustrated embodiment.

[0019] Figure 3 for Figure 1 A partial structural cross-sectional view of the vibration damper in the second position in the illustrated embodiment.

[0020] Figure 4 for Figure 1 A schematic diagram of the assembly state of the partition structure and piston rod in the illustrated embodiment.

[0021] Figure 5 for Figure 1 A schematic diagram of the assembly state of the first spring seat, the elastic element, the second spring seat, and the piston rod in the embodiment shown.

[0022] Figure 6 for Figure 1 Exploded view of the vibration damper in the illustrated embodiment.

[0023] Figure 7 for Figure 1 A partial structural cross-sectional view of the vibration damper in the second position in the illustrated embodiment.

[0024] Explanation of key component symbols:

[0025] 1000 vehicles

[0026] 100 shock absorbers

[0027] Cylinder 10

[0028] Chamber 10a

[0029] First cavity 10a1

[0030] Second cavity 10a2

[0031] Inner cylinder 11

[0032] Coordination Department 111

[0033] Guidance Department 112

[0034] outer cylinder 12

[0035] First portion 121

[0036] Second portion 122

[0037] Piston rod 20

[0038] Partition structure 30

[0039] First channel 30b

[0040] Second channel 30a

[0041] Overflow hole 30c

[0042] Shell 31

[0043] First shell 311

[0044] Second shell 312

[0045] Barrel wall 3121

[0046] Bottom wall 3122

[0047] Sealing ring 32

[0048] Abutting portion 33

[0049] Plugging member 40

[0050] Elastic member 50

[0051] First spring seat 60

[0052] Second spring seat 70

[0053] Guide 80

[0054] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0056] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0057] 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 in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used in the description herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0058] Some embodiments of the present application are described in detail. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0059] Embodiments

[0060] Figure 1 A side view of a vehicle 1000 in an embodiment of the present application; Figure 2 A side view of a vehicle 1000 in an embodiment of the present application; Figure 1 A schematic view of a partial structure of a shock absorber 100 in an embodiment of the present application; Figure 3 A schematic view of a partial structure of a shock absorber 100 in an embodiment of the present application; Figure 1 A schematic view of a partial structure of a shock absorber 100 in an embodiment of the present application;

[0061] Referring to Figure 1 and Figure 2 An embodiment of the present application provides a vehicle 1000 comprising a shock absorber 100. The shock absorber 100 is installed between a wheel and a body of the vehicle 1000, and is used to dampen the impact from the road surface and improve the ride comfort of the vehicle 1000.

[0062] Continuing to refer to Figure 3 The principle of the shock absorber 100 is that when the body and the wheel move relative to each other, the piston rod 20 in the shock absorber 100 moves up and down, causing the liquid (such as oil) in the chamber 10a of the shock absorber 100 to repeatedly flow from one chamber to another chamber through different apertures. At this time, the friction between the aperture wall and the liquid and the internal friction between the liquid molecules form a damping force against the vibration, so that the vibration energy of the vehicle 1000 is converted into heat energy, which is then absorbed by the shock absorber 100 and dissipated into the atmosphere.

[0063] The working process of the shock absorber 100 is divided into a compression stroke and an extension stroke. In the compression stroke, the wheel approaches the body, the shock absorber 100 is compressed, and the piston rod 20 in the shock absorber 100 moves downward relative to the cylinder 10. In the extension stroke, the wheel jumps down, the wheel and the body move away from each other, and the piston rod 20 in the shock absorber 100 moves upward relative to the cylinder 10. At this time, the shock absorber 100 can provide a larger damping force.

[0064] Figure 4 A schematic view of an assembly state of the partition structure 30 and the piston rod 20 in an embodiment of the present application; Figure 1 A schematic view of an assembly state of the partition structure 30 and the piston rod 20 in an embodiment of the present application;

[0065] Referring toFigure 2 to Figure 4 The embodiment provides a damper 100, which comprises a cylinder 10, a piston rod 20, a partition structure 30, a blocking piece 40 (such as a throttle gasket) and an elastic piece 50. The cylinder 10 is internally provided with a chamber 10a, and the piston rod 20 is movably inserted into the chamber 10a. The partition structure 30 is sleeved on the piston rod 20 and can move with the piston rod 20 in the chamber 10a, and the partition structure 30 can divide the chamber 10a into a first cavity 10a1 and a second cavity 10a2. The partition structure 30 is internally provided with a first channel 30b at one end close to the first cavity 10a1, and is internally provided with a second channel 30a at one end close to the second cavity 10a2, and the first channel 30b and the second channel 30a are in axial communication. The partition structure 30 is further provided with an overflow hole 30c in communication with the second channel 30a, and the overflow hole 30c is in communication with the second cavity 10a2. The blocking piece 40 is movably arranged in the second channel 30a, and the blocking piece 40 has a first position (not shown in the figure) in communication with the first channel 30b and the second channel 30a, and a second position (see Figure 3 ) for blocking the first channel 30b and the second channel 30a. The elastic piece 50 is arranged in the second channel 30a and elastically abuts between the partition structure 30 and the blocking piece 40.

[0066] The damper 100 described above, in the stretching stroke, the piston rod 20 can drive the partition structure 30 to move into the chamber 10a, and divide the chamber 10a into the first cavity 10a1 and the second cavity 10a2 through the partition structure 30. Before the hydraulic pressure of the liquid in the first cavity 10a1 overcomes the elastic force of the elastic piece 50, the elastic piece 50 elastically supports the blocking piece 40 at the second position. In the stretching stroke, as the displacement of the piston rod 20 increases, the hydraulic pressure of the liquid in the first cavity 10a1 can overcome the elastic force of the elastic piece 50, so as to drive the blocking piece 40 to move away from the first channel 30b, and then switch from the second position to the first position, that is, in communication with the first channel 30b and the second channel 30a. In the first position, the liquid in the first cavity 10a1 can enter the second channel 30a through the first channel 30b, and then flow into the second cavity 10a2 through the overflow hole 30c from the second channel 30a, so as to form hydraulic damping by using the friction between the liquid and the hole wall of the overflow hole 30c and the friction between the liquid molecules. Therefore, when the damper 100 is subjected to a larger impact, for example, when the vehicle 1000 passes through a deceleration belt or other road surface generating a larger bump at a faster speed, by arranging the elastic piece 50 and the overflow hole 30c, a larger damping force is provided in the stretching stroke, the impact force transmitted to the vehicle body is reduced, the passengers can avoid feeling a severe impact, the impact noise is reduced, and the driving and control feeling is improved.

[0067] In some embodiments, as Figure 3 and Figure 4As shown, the partition structure 30 comprises a housing 31 and an abutting portion 33. The housing 31 is sleeved on the piston rod 20, and the abutting portion 33 is arranged on the inner circumferential wall of the housing 31 near one end of the housing 31 close to the first cavity 10a1. The abutting portion 33 surrounds the housing 31. The abutting portion 33 is arranged radially away from the piston rod 20 to define a first channel 30b between the abutting portion 33 and the piston rod 20. The side of the housing 31 away from the abutting portion 33 is provided with a second channel 30a in a direction pointing from the first cavity 10a1 to the second cavity 10a2. The blocking member 40 is movably sleeved on the piston rod 20 and can abut against the side of the abutting portion 33 close to the second channel 30a in the axial direction to block the first channel 30b and the second channel 30a. The elastic member 50 abuts against the side of the blocking member 40 away from the abutting portion 33 in the axial direction, and the elastic member 50 is located in the housing 31. In this way, the piston rod 20 provides an axial guide for the blocking member 40 during movement of the blocking member 40, and the elastic member 50 abuts against the blocking member 40 in the axial direction, so that the blocking member 40 can move more smoothly in the axial direction.

[0068] It should be understood that a gap is defined between the outer circumferential surface of the blocking member 40 and the inner circumferential wall of the housing 31. When the blocking member 40 switches from the second position to the first position, the blocking member 40 moves away from the abutting portion 33 in the axial direction, so that the liquid in the first channel 30b flows into the second channel 30a through the gap at one end of the second channel 30a in communication with the first channel 30b, and then flows to the other end of the second channel 30a.

[0069] Figure 5 For Figure 1 The assembly state diagram of the first spring seat 60, the elastic member 50, the second spring seat 70 and the piston rod 20 in the embodiment shown.

[0070] In some embodiments, as shown in Figure 3 and Figure 5 The elastic member 50 is sleeved on the piston rod 20 to provide an axial guide for the compression or reset of the elastic member 50 by the piston rod 20, so that the direction of the elastic force exerted by the elastic member 50 on the blocking member 40 is more stable. Optionally, the elastic member 50 is a coil spring.

[0071] It should be noted that different sizes of damping force can be provided by changing the elastic coefficient of the elastic member 50.

[0072] Figure 6 For Figure 1 The exploded view of the shock absorber 100 in the embodiment shown.

[0073] In some embodiments, in combination with Figure 3 , Figure 5 and Figure 6As shown, the damper 100 further comprises a first spring seat 60 and a second spring seat 70. The first spring seat 60 and the second spring seat 70 are respectively arranged in the second passage 30a. The first spring seat 60 is movably sleeved on the piston rod 20 and connected to the side of the blocking member 40 away from the first passage 30b, and the first spring seat 60 can move with the blocking member 40 in the second passage 30a. The second spring seat 70 is sleeved on the piston rod 20 and connected to the end of the shell 31 away from the abutting portion 33, and the second spring seat 70 can move with the shell 31. The elastic member 50 is elastically supported between the first spring seat 60 and the second spring seat 70 in the axial direction. In this way, the two ends of the elastic member 50 are respectively supported and positioned by the first spring seat 60 and the second spring seat 70.

[0074] In some embodiments, as shown in Figure 4 The overflow hole 30c is multiple, and the multiple overflow holes 30c are distributed on the side surface of the partition structure 30 at intervals, so as to facilitate the arrangement of the multiple overflow holes 30c on the partition structure 30. It should be noted that different damping forces can be provided by changing the aperture of the overflow hole 30c, for example, when the aperture of the overflow hole 30c is reduced, a larger damping force can be provided, and when the aperture of the overflow hole 30c is increased, a smaller damping force can be provided. Different damping forces can also be provided by changing the number of overflow holes 30c.

[0075] In some embodiments, as shown in Figure 3 and Figure 4 The partition structure 30 comprises a shell 31 and a sealing ring 32 (such as an O-ring). The shell 31 is sleeved on the piston rod 20 and is respectively provided with the first passage 30b and the second passage 30a. The sealing ring 32 is sleeved on the shell 31 and can be sealingly connected between the outer circumferential wall of the shell 31 and the inner circumferential wall of the chamber 10a, so as to divide the chamber 10a into the first cavity 10a1 and the second cavity 10a2. In this way, by providing the sealing ring 32, when the blocking member 40 blocks the first passage 30b and the second passage 30a, the first cavity 10a1 forms a sealed space, thereby improving the damping effect.

[0076] Figure 7 For Figure 1 The partial structure sectional view of the damper 100 in the second position in the embodiment shown.

[0077] In some embodiments, as shown in Figure 3 and Figure 4 The shell 31 comprises a first shell 311 and a second shell 312 arranged in the axial direction, and the sealing ring 32 is sleeved on the first shell 311. The first shell 311 is in a cylindrical shape. In combination with Figure 7As shown, the second shell 312 comprises a cylinder wall 3121 and a bottom wall 3122, the cylinder wall 3121 is connected to the first shell 311 at an end away from the first cavity 10a1, the bottom wall 3122 is connected to the cylinder wall 3121 at an end away from the first shell 311, and the overflow hole 30c is provided on the cylinder wall 3121. In this way, the sealing ring 32 is easily fitted on the first shell 311, and the overflow hole 30c is easily provided on the second shell 312, so that the separation structure 30 is easier to manufacture.

[0078] Alternatively, the first shell 311 and the second shell 312 are threadedly connected to improve the sealing effect of the second channel 30a. In the embodiment, the end of the first shell 311 away from the first cavity 10a1 is threaded into the end of the second shell 312 close to the first cavity 10a1.

[0079] In some embodiments, the first spring seat 60 is connected to the side of the blocking member 40 away from the first channel 30b, and the second spring seat 70 is connected to the bottom wall 3122.

[0080] In some embodiments, as shown in Figure 3 The cylinder barrel 10 comprises an outer cylinder 12 and an inner cylinder 11, the outer cylinder 12 has a first part 121 and a second part 122 connected in the axial direction, and the inner cylinder 11 is arranged in the first part 121 and defines the chamber 10a. In this way, the separation structure 30 is easily moved in the second part 122, and the sealing ring 32 is easily interference-fitted on the inner cylinder 11, so that during the stretching process, the separation structure 30 can be moved into the chamber 10a along with the piston rod 20, and the first cavity 10a1 is separated.

[0081] In some embodiments, as shown in Figure 7 The inner cylinder 11 comprises a fitting part 111 and a guide part 112 connected in the axial direction, and the guide part 112 is located at the end of the fitting part 111 close to the second part 122 (see Figure 2 In the direction along the first cavity 10a1 to the second cavity 10a2, the inner diameter of the guide part 112 gradually increases, so that during the stretching process, the separation structure 30 is driven by the piston rod 20 to enter the chamber 10a.

[0082] In some embodiments, as shown in Figure 2 and Figure 3 The damper 100 further comprises a guide 80, the guide 80 is connected to the end of the cylinder barrel 10 close to the first cavity 10a1, and the piston rod 20 passes through the guide 80 and extends into the chamber 10a, so that the movement of the piston rod 20 can be guided by the guide 80.

[0083] In the damping device 100 provided by the embodiment, when the wheel jumps downward during the stretching process, the piston rod 20 moves towards the guide 80, thereby pulling the partition structure 30 into the chamber 10a, and the sealing ring 32 is in interference fit with the cylinder 10, so that the first chamber 10a1 forms a sealed space. As the piston rod 20 continues to move upwards, the hydraulic pressure in the first chamber 10a1 pushes the elastic member 50 to compress, thereby pushing the blocking member 40 to move away from the first channel 30b, and then connecting the first channel 30b and the second channel 30a, so that the liquid in the first chamber 10a1 enters the second channel 30a through the first channel 30b, and then flows out from the overflow hole 30c to the second chamber 10a2. Due to the fact that the space between the blocking member 40 and the bottom wall 3122 becomes smaller, the inflow amount of the liquid is greater than the outflow amount of the overflow hole 30c, thereby forming a hydraulic chamber and providing damping.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application and not limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application.

Claims

1. A damper characterized by, The application relates to a cylinder-piston unit, which comprises: a cylinder provided with a chamber; a piston rod movably arranged in the chamber; a partition structure sleeved on the piston rod and capable of moving in the chamber, the partition structure being capable of separating the chamber into a first chamber and a second chamber, the partition structure being provided with a first channel at one end close to the first chamber and a second channel at one end close to the second chamber, the first channel being axially communicated with the second channel, the partition structure being further provided with overflow holes communicated with the second channel and the second chamber; a blocking member movably arranged in the second channel, the blocking member having a first position for communicating the first channel and the second channel and a second position for blocking the first channel and the second channel; and a resilient member arranged in the second channel and elastically abutting between the partition structure and the blocking member.

2. The damper of claim 1, wherein: The partition structure comprises a shell and an abutting portion, the shell being sleeved on the piston rod, the abutting portion being protruded on the inner circumferential wall of one end of the shell close to the first chamber, and the abutting portion being arranged around the shell, the abutting portion being radially spaced from the piston rod to define the first channel between the abutting portion and the piston rod; the second channel being arranged on the side of the shell away from the abutting portion in the direction from the first chamber to the second chamber; the blocking member being movably sleeved on the piston rod, the blocking member abutting on the side of the abutting portion close to the second channel in the second position to block the first channel and the second channel; the resilient member being axially abutted on the side of the blocking member away from the abutting portion, and the resilient member being arranged in the shell.

3. The damper of claim 2, wherein: The resilient member is sleeved on the piston rod.

4. The damper of claim 1, wherein: The overflow holes are multiple, and the multiple overflow holes are distributed on the side of the partition structure.

5. The damper of claim 1, wherein: The partition structure comprises a shell and a sealing ring; the shell being sleeved on the piston rod and being respectively provided with the first channel and the second channel; the sealing ring being sleeved on the shell and being capable of being sealingly connected between the outer circumferential wall of the shell and the inner circumferential wall of the chamber to separate the chamber into the first chamber and the second chamber.

6. The damper of claim 5, wherein: The shell comprises a first shell and a second shell arranged in the axial direction, and the sealing ring is sleeved on the first shell; the first shell being in a cylindrical shape; the second shell comprising a cylinder wall and a bottom wall, one end of the cylinder wall being connected to the end of the first shell away from the first chamber, and the bottom wall being connected to the end of the cylinder wall away from the first shell, and the overflow holes being arranged on the cylinder wall.

7. The damper of claim 5, wherein: The cylinder comprises an outer cylinder and an inner cylinder; the outer cylinder having a first part and a second part connected in the axial direction; the inner cylinder being arranged in the first part and defining the chamber.

8. The damper of claim 7, wherein: The inner cylinder comprises a fitting part and a guiding part connected in the axial direction, and the guiding part is located at one end of the fitting part close to the second part; in the direction from the first chamber to the second chamber, the inner diameter of the guiding part gradually increases.

9. The damper of claim 1, wherein: The shock absorber further comprises a guide connected to the cylinder near one end of the first chamber; The piston rod passes through the guide and extends into the chamber.

10. A vehicle characterized by comprising: A shock absorber comprising any of claims 1 to 9.

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