CN220015935U - Shock absorber and vehicle - Google Patents

Abstract

The utility model discloses a shock absorber and a vehicle, wherein the shock absorber comprises: the first part is provided with a first limit part and a second limit part; the second part comprises a cylinder body, the partial structure of the first part is positioned in the cylinder body, the first part and the second part can move relatively, the second part is provided with a third limiting part and a fourth limiting part, at least one of the third limiting part and the fourth limiting part is positioned on the outer side of the second part, the third limiting part is suitable for being in butt limit with the first limiting part, and the fourth limiting part is suitable for being in butt limit with the second limiting part. Therefore, according to the damper disclosed by the utility model, the second part is limited to move relative to the first part, the effect of limiting the movement stroke of the second limiting part is realized, the service performance of the damper is improved, the risk of failure of the damper is reduced, and the axial size of the damper is reduced, so that the damper is compact in structure.

Description

Shock absorber and vehicle

Technical Field

The utility model relates to the field of vibration absorbers, in particular to a vibration absorber and a vehicle with the vibration absorber.

Background

In the related art, when the existing shock absorber is applied to a vehicle, the occupied size is large, and the arrangement of the shock absorber is not facilitated.

Disclosure of Invention

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides the shock absorber, the first limiting part and the second limiting part can limit the moving stroke of the second limiting part, and the axial size of the shock absorber is reduced.

The utility model further provides a vehicle with the shock absorber.

The shock absorber according to the present utility model includes:

a first portion having a first limit portion and a second limit portion;

a second part, the second part comprises a cylinder body, the partial structure of the first part is positioned in the cylinder body, the first part and the second part can move relatively, the second part is provided with a third limit part and a fourth limit part, at least one of the third limit part and the fourth limit part is positioned at the outer side of the cylinder body,

the third limiting part is suitable for being in abutting limiting with the first limiting part so that the shock absorber has a first limiting position, and the fourth limiting part is suitable for being in abutting limiting with the second limiting part so that the shock absorber has a second limiting position.

According to the damper, when the second part moves to the first limit position in the first direction, the third limit part is in butt joint with the first limit part to limit, and when the second part moves to the second limit position, the fourth limit part is in butt joint with the second limit part to limit, and the first limit part and the second limit part limit the third limit part and the fourth limit part respectively, so that the second part is limited to move relative to the first part, the effect of limiting the movement stroke of the second part is achieved, the service performance of the damper is improved, the failure risk of the damper is reduced, at least one of the third limit part and the fourth limit part is positioned on the outer side of the cylinder body, the damper is limited by utilizing the space outside the damper, the limit part is prevented from being arranged in the damper, the axial dimension of the damper is reduced, the damper is compact in structure, and the space for arranging the damper is reduced.

In some examples of the utility model, the cylinder is of an open structure, and a portion of the structure of the first portion is movable from the cylinder to outside the cylinder.

In some examples of the utility model, the barrel has a sidewall extending in a direction of relative movement of the first portion and the second portion, and the fourth stop and at least part of the structure of the first portion are located on inner and outer sides of the sidewall.

In some examples of the utility model, the top wall of the barrel is formed as the third limit portion.

In some examples of the utility model, at least one of the first stop and the third stop is an elastic member, and/or,

and/or; at least one of the second limiting part and the fourth limiting part is an elastic piece.

In some examples of the utility model, the shock absorber further comprises: and one end of the elastic buffer piece is fixed on the first part, and the other end of the elastic buffer piece is arranged on the second part.

In some examples of the utility model, the fourth limit portion is configured as a mounting portion of the other end of the elastic buffer.

In some examples of the present utility model, a support member mounted to the first portion, a surface of the support member opposite the elastic buffer member being provided with a first mounting groove, the one end of the elastic buffer member being mounted in the first mounting groove.

In some examples of the utility model, the first portion includes a first connection portion and a second connection portion, the first connection portion being connected to the second connection portion, the first connection portion being adapted to be connected to a vehicle body, a portion of the second connection portion being located within the barrel;

the first connecting portion comprises a shell, the shell is arranged on the outer side of at least part of the second portion, and the second limiting portion is arranged on the shell.

In some examples of the utility model, the second stop is formed at a bottom of the housing and the second stop is located below the first stop in a direction in which the first portion moves relative to the second portion.

In some examples of the present utility model, an elastic member is disposed on a side of the fourth limiting portion facing the second limiting portion.

In some examples of the utility model, the housing has a vent.

In some examples of the utility model, the vent is provided with a filter.

In some examples of the present utility model, the first portion has a first mounting hole, an inner peripheral wall of the first mounting hole has a mounting boss, and an outer peripheral wall of the first stopper has a second mounting groove, and the mounting boss cooperates with the second mounting groove to fix the first stopper to the first portion.

In some examples of the utility model, an end of the first limiting portion adjacent to the support member has a guide ramp adapted for guiding engagement with the mounting boss to mount the first limiting portion to the support member of the first portion.

In some examples of the utility model, the first portion includes a stator winding and the second portion has a permanent magnet mated with the stator winding.

In some examples of the utility model, the first portion has a routing channel formed thereon.

In some examples of the present utility model, a guide channel is formed on the first portion, a guide post is provided in the cylinder, the guide post is installed in the guide channel, and the guide post and the guide channel are in guide fit so that the first portion and the second portion relatively move along the extending direction of the guide post.

In some examples of the utility model, the second portion has a connecting arm adapted to connect with a wheel.

According to the vehicle of the present utility model, the vehicle includes the shock absorber described above.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a cross-sectional view of a shock absorber according to an embodiment of the present utility model;

fig. 2 is a schematic view of a shock absorber according to an embodiment of the present utility model.

Reference numerals:

shock absorber 100;

a first part 1; an end cap 11; a line passing hole 11a; a stator winding 12; a guide passage 12a; a routing channel 12b; a housing 13; a vent hole 13a; a mounting flange 13c;

a second part 2; a cylinder 21; the accommodating groove 211; a third limit portion 210; a fourth limit portion 21a; a permanent magnet 22; a guide post 21b; a connection arm 21c;

a first limit part 3; a second mounting groove 32; a guide slope 33;

a second limit part 4; a gap 41; a third mounting groove 42;

an elastic buffer 5;

a support 6; a first mounting groove 61; a mounting boss 63;

a filter 7; a sensor 8.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The shock absorber 100 according to the embodiment of the present utility model will be described in detail with reference to fig. 1 and 2, but the present utility model is not limited thereto, and the shock absorber 100 may be applied to other devices where the shock absorber 100 is required to be provided, and the present utility model will be described with reference to the shock absorber 100 being applied to a vehicle.

As shown in fig. 1 and 2, a shock absorber 100 according to an embodiment of the present utility model includes a first portion 1 and a second portion 2. The first part 1 is provided with a first limiting part 3 and a second limiting part 4, the second part 2 comprises a cylinder 21, part of the structure of the first part 1 is positioned in the cylinder 21, and the first part 1 and the second part 2 can relatively move. The second portion 2 has a third limit portion 210 and a fourth limit portion 21a, and at least one of the third limit portion 210 and the fourth limit portion 21a is located outside the cylinder 21, and it may be understood that the third limit portion 210 is located outside the cylinder 212 or the fourth limit portion 21a is located outside the cylinder 21, or both the third limit portion 210 and the fourth limit portion 21a are located outside the cylinder 21. For example, the fourth limiting portion 21a is provided on the outer peripheral wall of the cylinder 21, so that when the second portion 2 is matched with the first portion 1, the axial dimension of the damper 100 is reduced, the damper 100 is compact, the effect of reducing the volume of the damper 100 is achieved, the space for arranging the damper 100 is reduced, and the arrangement of the damper is facilitated.

The third limiting part 210 is suitable for being in abutting limiting connection with the first limiting part 3 so that the shock absorber has a first limiting position, the fourth limiting part 21a is suitable for being in abutting limiting connection with the second limiting part 4 so that the shock absorber has a second limiting position, so that in the process that the second part 2 moves relative to the first part 1, the effect that the first limiting part 3 and the second limiting part 4 can limit the third limiting part 210 and the fourth limiting part 21a is achieved, the movement of the second part 2 relative to the first part 1 is limited, and the movement stroke of the second part 2 is limited.

Therefore, according to the damper 100 of the present utility model, the movement of the second portion 2 relative to the first portion 1 is restricted, the effect of restricting the movement stroke of the second stopper 4 is achieved, the usability of the damper 100 is improved, the risk of failure of the damper 100 is reduced, and the axial dimension of the damper 100 is advantageously reduced, so that the damper 100 is compact.

In the prior art, the inner top wall of the cylinder is generally formed into a limiting part for downward movement of the cylinder, and in order to avoid hard collision, a buffer structure needs to be arranged at the inner top wall or a part contacted with the inner top wall, so that the limiting part occupies the axial dimension of the damper, and the axial dimension of a vehicle occupied by the whole damper is larger, which is not beneficial to the arrangement of the damper. According to the shock absorber, the limiting part is arranged on the outer side of the cylinder body, so that the space outside the cylinder body is effectively utilized, the axial size is reduced, the axial space occupied by the shock absorber is reduced, the axial size of the shock absorber is reduced, the shock absorber is compact in structure, and the space for arranging the shock absorber is reduced.

As shown in fig. 1, the cylinder 21 is of an open structure to form a receiving groove 211, and a part of the structure of the first portion 1 can be moved from the cylinder 21 to the outside of the cylinder 21. Thus, the part of the first portion 1 can move along the accommodating groove 211 and move out of the accommodating groove 211 from the accommodating groove 211.

In some embodiments of the present utility model, as shown in fig. 1, the second portion 2 has a first limit position and a second limit position relative to the first portion 1 along the first direction, where the third limit portion 210 abuts and limits the first limit portion 3, and where the fourth limit portion 21a abuts and limits the second limit portion 4. In the second extreme position, the part of the first part 1 that is originally located in the receiving groove 211 may protrude out of the receiving groove.

In some embodiments of the present utility model, the first limiting portion 3 and the second limiting portion 4 are respectively disposed at the first limiting position and the second limiting position, so that the first limiting portion 3 and the second limiting portion 4 respectively cooperate with the third limiting portion 210 and the fourth limiting portion 21a in the first direction to implement limiting, thereby limiting the movement of the second portion 2 relative to the first portion 1, and implementing the effect of limiting the movement stroke of the second portion 2. When the shock absorber 100 is placed in the direction shown in fig. 1, the first direction is the X direction shown in fig. 1, and is the height direction of the vehicle.

Further, the first portion 1 is adapted to be fixedly connected with a body of a vehicle to achieve an effect of fixedly assembling the damper 100 to the body, the second portion 2 is adapted to be connected with a wheel of the vehicle to achieve an effect of connecting the wheel with the damper 100, i.e. the damper 100 is adapted to be connected between the body and the wheel, and an effect of changing a stroke of the damper 100, i.e. a length of the damper 100 is reduced or increased along the first direction by changing a relative position of the second portion 2 and the first portion 1, thereby achieving an effect of changing a size of a ground clearance of the body. Further, the shock absorber 100 can absorb the generated force of the wheels to the vehicle body, thereby improving the running performance of the vehicle.

Further, as shown in fig. 1, when the shock absorber 100 is placed in the direction of fig. 1, the length of the shock absorber 100 decreases when the second portion 2 moves toward the first stopper 3 in the first direction, and the shock absorber 100 reaches the shortest stroke state when the third stopper 210 abuts against the first stopper 3. When the second portion 2 moves toward the second limiting portion 4, the length of the damper 100 increases, and when the fourth limiting portion 21a abuts against the second limiting portion 4, the damper 100 reaches the longest stroke state. Thus, when the shock absorber 100 is applied to a vehicle, by changing the relative positions of the second portion 2 and the first portion 1, the effect of reducing or increasing the length of the shock absorber 100 is achieved, and further the effect of changing the size of the ground clearance of the vehicle body is achieved.

Therefore, by arranging the first limiting part 3 and the second limiting part 4 so as to respectively limit the movement of the second part 2 relative to the first part 1 in the first direction, the effect of limiting the movement stroke of the second part 2 is achieved, the service performance of the damper 100 is improved, the risk of failure of the damper 100 is reduced, and at least one of the third limiting part 210 and the fourth limiting part 21a is positioned outside the second part 2, thereby being beneficial to reducing the axial dimension of the damper 100, enabling the damper 100 to be compact in structure and reducing the space for arranging the damper 100.

In some embodiments of the present utility model, as shown in fig. 1, the accommodating groove 211 has a side wall extending along a direction of relative movement of the first portion 1 and the second portion 2, at least part of the structures of the fourth limiting portion 21a and the first portion 1 are located at both inner and outer sides of the side wall, and as shown in fig. 1, the fourth limiting portion 21a is located at an outer side of the side wall, so that the fourth limiting portion 21a is suitable for abutting and limiting with the second limiting portion 4 in a process of relative movement of the first portion 1 and the second portion 2 along the extending direction of the side wall, and an effect of limiting displacement of the damper by the second limiting portion 4 and the fourth limiting portion 21a is achieved, thereby limiting movement of the second portion 2 relative to the first portion 1, and an effect of limiting a movement stroke of the damper is achieved. The partial structure of the first part 1 is located at the inner side of the side wall, so that the partial structure of the first part 1 is located in the accommodating groove 211, and the effect of limit fit between the first part 1 and the second part 2 is achieved, so that the first part 1 and the second part 2 reliably move relatively along the extending direction of the side wall.

In some embodiments of the present utility model, as shown in fig. 1, a top wall of the accommodating groove 211 is formed as a third limiting portion 210, and in the process of moving the first portion 1 and the second portion 2 relatively, the third limiting portion 210 abuts against the first limiting portion 3 to limit the relative position of the first portion 1 and the second portion 2 in the first limit position, so as to achieve the effect of limiting the movement stroke of the second portion 2, and achieve the effect of limiting the movement stroke of the second portion 2.

In some embodiments of the present utility model, as shown in fig. 1, the second limiting portion 4 is sleeved outside the second portion 2, so that when the second portion 2 moves relative to the first portion 1 along the first direction, the fourth limiting portion 21a is adapted to abut against the second limiting portion 4, thereby achieving the effect that the second limiting portion 4 is limited to the second portion 2 along the first direction.

Further, the second limiting portion 4 is configured in an annular structure, and a gap 41 is formed between the second limiting portion 4 and the outer wall of the cylinder 21, so that interference between the second portion 2 and the second limiting portion 4 is avoided.

In some embodiments of the present utility model, as shown in fig. 1, at least one of the first stopper 3 and the third stopper 210 is an elastic member, and/or; at least one of the second limiting portion 4 and the fourth limiting portion 21a is an elastic member, for example, the first limiting portion 3, the third limiting portion 210, the second limiting portion 4 and the fourth limiting portion 21a are elastic members. In some embodiments of the present utility model, the first limiting portion 3 and the second limiting portion 4 are both elastic members.

Further, the elastic piece can be made of hard rubber, and can be made of phosphor bronze or beryllium bronze or manganese steel or stainless steel, so that the elastic piece can bear larger acting force, and the buffering effect is achieved. Through setting up first spacing portion 3 and second spacing portion 4 and all being the elastic component, when second portion 2 and the butt of first spacing portion 3, first spacing portion 3 is through elastic deformation absorption second portion 2 to the effort of first spacing portion 3 to when making shock absorber 100 reach shortest stroke state, avoid second portion 2 and first portion 1 hard contact, or, in order to when second portion 2 and the butt of second spacing portion 4, second spacing portion 4 is through elastic deformation absorption second portion 2 to the effort of second spacing portion 4, when making shock absorber 100 reach longest stroke state, avoid second portion 2 and first portion 1 hard contact, thereby be favorable to prolonging shock absorber 100's life.

In some embodiments of the utility model, as shown in fig. 1, the second part 2 may comprise: the cylinder 21, the cylinder 21 is formed with the accommodation groove 211, so that the partial structure of the first part 1 is positioned in the accommodation groove 211, thereby facilitating the second part 2 to be matched with the first part 1 along the first direction. The outer peripheral wall of the cylinder 21 is formed with a fourth limiting portion 21a, and the cylinder 21 is further formed with a third limiting portion 210, and the third limiting portion 210 may be one end of the cylinder 21 near the first limiting portion 3, and the fourth limiting portion 21a abuts against the second limiting portion 4 at the second limiting position, so as to achieve the effect of limiting the stroke of the shock absorber 100 in the first direction.

Further, in the process of moving the second portion 2 relative to the first portion 1 along the first direction, when the shock absorber 100 reaches the shortest stroke state, that is, in the first limit position, the third limiting portion 210 abuts against the first limiting portion 3, so that in the first direction, the first limiting portion 3 limits the barrel 21 to further move relative to the first portion 1, thereby achieving the effect of limiting the relative position between the second portion 2 and the first portion 1, and further achieving the effect of limiting the shortest stroke of the shock absorber 100.

When the damper 100 reaches the longest stroke state, that is, the fourth limiting portion 21a abuts against the second limiting portion 4 at the second limiting position, the second limiting portion 4 limits the barrel 21 to further move relative to the first portion 1 in the first direction, so that the effect of limiting the relative position of the second portion 2 and the first portion 1 is achieved, and the effect of limiting the longest stroke of the damper 100 is further achieved.

In some embodiments of the present utility model, as shown in fig. 1, shock absorber 100 may further comprise: the elastic buffer piece 5, the first part 1 is equipped with support piece 6, first spacing portion 3 is fixed in support piece 6, the one end of elastic buffer piece 5 is fixed in first part 1, and the other end of elastic buffer piece 5 sets up in the second part, in order to realize that elastic buffer piece 5 elastic support is between first part 1 and second part 2, can absorb the relative effort between partial first part 1 and second part 2 effectively through elastic buffer piece 5, in order to make elastic buffer piece 5 support reliably between first part 1 and second part 2, and then be favorable to promoting shock attenuation effect of shock absorber 100, promote the travelling performance of vehicle.

In some embodiments of the present utility model, as shown in fig. 1, the first portion 1 is provided with a support member 6, the first limiting portion 3 is fixed to the support member 6, and the fourth limiting portion 21a is configured as a mounting portion of the other end of the elastic cushion 5, thereby achieving the effect that the elastic cushion 5 is located between the fourth limiting portion 21a and the support member 6.

Further, as shown in fig. 1, in the first direction, the support member 6 is disposed opposite to the fourth limiting portion 21a, and the elastic buffer member 5 is located between the support member 6 and the fourth limiting portion 21a, where the elastic buffer member 5 may be configured as a spring, and the elastic buffer member 5 may also be configured as a spring sheet, and the embodiment of the present utility model is described taking the elastic buffer member 5 as a spring as an example. When the elastic cushion 5 is pressed, the elastic cushion 5 may generate a damping force. Therefore, when the second portion 2 moves towards the first portion 1 along the first direction, the fourth limiting portion 21a presses the elastic buffer member 5 to generate a damping force, and the generated damping force acts on the fourth limiting portion 21a, so that at least part of the acting force exerted by the fourth limiting portion 21a on the elastic buffer member 5 is offset, further the shock absorber 100 absorbs the generated acting force of the wheels on the vehicle body, and the running performance of the vehicle is improved.

When the force applied by the fourth limiting portion 21a to the elastic buffer 5 is greater than the damping force generated by the elastic buffer 5, the elastic buffer 5 continues to be pressed, and in the first direction, the fourth limiting portion 21a moves towards the support 6, so that when the shock absorber 100 reaches the shortest stroke state, the end portion of the cylinder 21 is suitable for abutting against the first limiting portion 3 provided on the support 6, and the effect of limiting the shortest stroke of the shock absorber 100 is achieved.

When the acting force applied by the fourth limiting portion 21a to the elastic buffer 5 is smaller than the damping force generated by the elastic buffer 5, the fourth limiting portion 21a moves towards the second limiting portion 4 along the first direction under the action of the elastic buffer 5, so that when the shock absorber 100 reaches the longest stroke state, the fourth limiting portion 21a abuts against the second limiting portion 4, and the longest stroke limiting effect of the shock absorber 100 is achieved.

In the embodiment of the utility model, the fourth limiting part 21a is configured as the lower mounting seat of the elastic buffer member 5, so that the structure of the shock absorber is effectively utilized, the lower mounting seat of the elastic buffer member 5 is used as a part of the limiting structure, the space is reasonably utilized on the basis of not changing the original structure, the space utilization rate is improved, and meanwhile, the use of parts is reduced.

For example, when the wheel is impacted by the road surface during running, the wheel jumps up, and in the first direction, the wheel drives the second part 2 to move relative to the first part 1, that is, the second part 2 moves towards the supporting piece 6, so that the fourth limiting part 21a presses the elastic buffer piece 5, the elastic buffer piece 5 is pressed to generate damping force, and the generated damping force acts on the fourth limiting part 21a, so that at least part of acting force applied by the fourth limiting part 21a to the elastic buffer piece 5, that is, acting force of the elastic buffer piece 5 to the vehicle body is absorbed by the wheel, the vibration reduction effect of the vibration absorber 100 is realized, and the running performance of the vehicle is improved.

When the acting force generated by the wheel on the vehicle body exceeds a certain range value, and the cylinder 21 is abutted against the first limiting part 3, namely, the shock absorber 100 reaches the shortest stroke state, the wheel reaches the jump-up limit, and the first limiting part 3 limits the cylinder 21 to move further relative to the first part 1, so that the effect of limiting the shortest stroke of the shock absorber 100 is realized.

Correspondingly, in the process of wheel jumping, the shock absorber 100 stretches, the fourth limiting part 21a moves towards the second limiting part 4 along the first direction, when the fourth limiting part 21a is abutted against the second limiting part 4, namely, the shock absorber 100 reaches the longest stroke state, the wheel reaches the jumping limit, and the second limiting part 4 limits the fourth limiting part 21a to move further relative to the second limiting part 4, so that the effect of limiting the longest stroke of the shock absorber 100 is achieved.

In some embodiments of the present utility model, as shown in fig. 1, the first portion 1 has a support member 6, a surface of the support member 6 opposite to the elastic cushion 5 is provided with a first mounting groove 61, and one end of the elastic cushion 5 is mounted in the first mounting groove 61, thereby achieving the effect that one end of the elastic cushion 5 is fixed to the support member 6.

Further, the supporting member 6 may be made of hard rubber, the surface of the supporting member 6 opposite to the elastic buffer member 5 is provided with a first mounting groove 61 adapted to the elastic buffer member 5, and the elastic buffer member 5 is adapted to extend into the first mounting groove 61 from the surface of the supporting member 6 opposite to the elastic buffer member 5 during the assembling and matching process of the elastic buffer member 5 and the supporting member 6, so as to achieve the effect that one end of the elastic buffer member 5 is fixed to the supporting member 6.

In some embodiments of the present utility model, as shown in fig. 1, the elastic buffer 5 may be configured in a ring shape, and the elastic buffer 5 is sleeved outside the cylinder 21, so that when the elastic buffer 5 is sleeved outside the cylinder 21, the elastic buffer 5 is located between the fourth limiting portion 21a and the supporting member 6 in the first direction.

Further, as shown in fig. 1, the elastic buffer 5 may be configured as a coil spring, and in the first direction, the elastic buffer 5 is located between the fourth limiting portion 21a and the support 6, so that the fourth limiting portion 21a presses the elastic buffer 5 to elastically deform the elastic buffer 5 in the process of reducing the stroke of the shock absorber 100, while the elastic buffer 5 presses the support 6, and since the support 6 may be configured as a hard rubber, the support 6 may bear a large pressing force to reliably dispose the elastic buffer 5 between the fourth limiting portion 21a and the support 6, thereby improving the shock absorbing performance of the shock absorber 100.

And, along the second direction, the outside of elastic buffer 5 is located to first part 1 cover, and elastic buffer 5 is located between barrel 21 and first part 1, realizes that elastic buffer 5 locates the inside effect of shock absorber 100 to make elastic buffer 5 set up between barrel 21 and first part 1 reliably, be favorable to avoiding elastic buffer 5 and the risk of barrel 21 separation. The second direction is a radial direction of the shock absorber 100, and is perpendicular to the first direction.

In some embodiments of the present utility model, as shown in fig. 1, the support member 6 has a first mounting hole, an inner circumferential wall of which has a mounting boss 63, and an outer circumferential wall of the first stopper 3 has a second mounting groove 32, and the mounting boss 63 is mounted in the second mounting groove 32 so that the first stopper 3 is fixed to the support member 6.

Further, as shown in fig. 1, the support member 6 may be configured in a ring-shaped structure, when the support member 6 is placed in the direction in fig. 1, the first mounting hole is configured as a through hole penetrating the support member 6 in the first direction, and the support member 6 has a mounting boss 63 protruding from an inner peripheral wall of the first mounting hole, that is, the inner peripheral wall of the first mounting hole has a mounting boss 63, and the mounting boss 63 is used for the support member 6 to be engaged with the first limiting portion 3, thereby achieving an effect of fixedly assembling the support member 6 with the first limiting portion 3.

Further, as shown in fig. 1, when the first limiting portion 3 is placed in the direction of fig. 1, the second mounting groove 32 is configured as a groove structure recessed toward the inside of the first limiting portion 3, so as to achieve the effect that the outer peripheral wall of the first limiting portion 3 has the second mounting groove 32. When the first limiting part 3 is assembled with the supporting piece 6 in a matched mode, the mounting boss 63 is mounted in the second mounting groove 32, and the mounting boss 63 is in limiting fit with the first limiting part 3, so that the relative position of the first limiting part 3 and the supporting piece 6 is limited, the risk that the first limiting part 3 is separated from the supporting piece 6 is reduced, and the first limiting part 3 is reliably assembled with the supporting piece 6.

In some embodiments of the present utility model, as shown in fig. 1, the first limiting part 3 has a guiding inclined surface 33, and the guiding inclined surface 33 is adapted to be in guiding engagement with the mounting boss 63 so that the first limiting part 3 is mounted on the support member 6 of the first part 1, thereby facilitating the mounting of the first limiting part 3 on the support member 6 by an operator.

Further, as shown in fig. 1, when the first limiting portion 3 and the supporting member 6 are placed in the direction in fig. 1, during the assembly process of the first limiting portion 3 and the supporting member 6, the first limiting portion 3 moves upward along the first direction from the lower side of the supporting member 6, and the guide inclined surface 33 and the mounting boss 63 stop against and guide, so that the first limiting portion 3 penetrates through the first mounting hole from the lower side of the supporting member 6, and the effect that the first limiting portion 3 is assembled on the supporting member 6 is achieved.

Further, as shown in fig. 1, when the first limiting portion 3 is placed in the direction of fig. 1, the upper end of the first limiting portion 3 has a guiding slope 33, so that an operator can conveniently assemble the first limiting portion 3 to the supporting member 6 from the lower end of the supporting member 6 during the process of assembling the first limiting portion 3 to the supporting member 6. Thus, the end of the first limiting portion 3 near the supporting member 6 has a guiding slope 33, thereby facilitating the operator to mount the first limiting portion 3 to the supporting member 6.

In some embodiments of the present utility model, as shown in fig. 1, the first portion 1 includes a first connection portion and a second connection portion, where the first connection portion is connected with the second connection portion, and the first connection portion is adapted to be connected with a vehicle body, so as to achieve an effect of connecting the first portion 1 with the vehicle body, and further achieve an effect of connecting the shock absorber 100 with the vehicle body, and a part of a structure of the second connection portion is located in the accommodating groove 211, so as to achieve an effect that a part of a structure of the first portion 1 is located in the accommodating groove 211, so that the first portion 1 is adapted to be in a limit fit with the second portion 2.

The first connecting portion comprises a housing 13, the housing is arranged at the outer side of at least part of the second portion 2, the second limiting portion 4 is arranged on the housing 13, in some embodiments of the utility model, the housing 13 can be further provided with a vent hole 13a, the housing 13 is sleeved at the outer side of the cylinder 21 and is fixed with the supporting piece 6, the housing 13 is provided with the vent hole 13a, the effect of communicating the interior of the damper 100 with the outside is achieved by arranging the vent hole 13a, and heat in the damper 100 can be dissipated from the vent hole 13a, so that the heat dissipation of the damper 100 is facilitated, the high temperature risk of the damper 100 is avoided, the service performance of the damper 100 is improved, and the failure risk of the damper 100 is reduced. Wherein the above-mentioned support 6 is also provided on the first connection portion.

Further, the housing 13 may have a plurality of ventilation holes 13a, thereby further facilitating heat dissipation of the shock absorber 100 and further avoiding the risk of high temperature of the shock absorber 100.

Further, in the second direction, the outer shell 13 is sleeved outside the cylinder 21 to achieve the effect that the first part 1 is sleeved outside the second part 2, and the outer shell 13 is sleeved outside the elastic buffer member 5, the elastic buffer member 5 is arranged between the cylinder 21 and the outer shell 13, the effect that the outer shell 13 shields the elastic buffer member 5 is achieved, the elastic buffer member 5 is prevented from being polluted, the service performance of the shock absorber 100 is improved, and the risk of failure of the shock absorber 100 is reduced.

For example, during the running process of the vehicle, the casing 13 can effectively avoid the objects such as soil, stones and the like from polluting the elastic buffer member 5, and avoid the elastic buffer member 5 from being polluted, thereby improving the working stability of the elastic buffer member 5.

In some embodiments of the present utility model, as shown in fig. 1, the first portion 1 may further have an end cap 11, specifically, the end cap 11 is provided at a first connection portion of the first portion 1, the end cap 11 is located at a side of the support 6 away from the second portion 2 and is fixed to the support 6, and the end cap 11 has a line passing hole 11a. The damper 100 may also have a sensor 8, the sensor 8 being adapted to monitor the relative position of the second part 2 and the first part 1, thereby facilitating the damper 100 to adjust the relative position of the second part 2 and the first part 1, and thereby facilitating the effect of adjusting the length of the damper 100.

As shown in fig. 1, when the housing 13 is placed in the orientation of fig. 1, the support 6 is positioned at the end of the housing 13 near the end cap 11, and the support 6 is positioned inside the housing 13. Further, as shown in fig. 1, in the circumferential direction of the housing 13, the housing 13 may have a fixing hole, and the outer circumferential wall of the support member 6 has a fixing fit hole corresponding to the fixing hole, so that in the process of fitting the housing 13 with the support member 6, the fixing hole is correspondingly fitted with the fixing fit hole to achieve the effect of positioning fit of the housing 13 with the support member 6, and is fixed to the fixing hole and the fixing fit hole by the fixing member in a penetrating manner, thereby achieving the effect of fixing fit of the housing 13 with the support member 6. Further, the housing 13 may have a plurality of fixing holes, the supporting member 6 may have a plurality of fixing holes, and the plurality of fixing holes are respectively matched with the plurality of fixing holes in a one-to-one correspondence manner, and the housing 13 and the supporting member 6 are fixedly assembled through the plurality of fixing members, so that the connection strength between the housing 13 and the supporting member 6 is improved, and the risk of separation of the housing 13 and the supporting member 6 is reduced.

As shown in fig. 1, the vent hole 13a is configured as a through hole penetrating the housing 13, so as to achieve the effect of communicating the inside and the outside of the damper 100, so that air flows between the inside and the outside of the damper 100, thereby achieving the effect of heat dissipation of the damper 100 by the air flow, avoiding the risk of high temperature of the damper 100, improving the service performance of the damper 100, and reducing the risk of failure of the damper 100.

In some embodiments of the present utility model, as shown in fig. 1, the second limiting portion 4 is formed at the bottom of the housing 13, and the second limiting portion 4 is located below the fourth limiting portion 21a in the direction in which the first portion 1 moves relative to the second portion 2, so that the third limiting portion 210 is adapted to abut against and limit the first limiting portion 3 during the movement of the first portion 1 relative to the second portion 2, so that the fourth limiting portion 21a is adapted to abut against and limit the second limiting portion 4, thereby realizing the effect of limiting the movement stroke of the first portion 1 and the second portion 2, and realizing the effect of limiting the movement stroke of the second portion 2.

In some embodiments of the present utility model, as shown in fig. 1, a side of the fourth limiting portion 21a facing the second limiting portion 4 is provided with an elastic buffer 5, so that the fourth limiting portion 21a is adapted to be in abutting engagement with the elastic buffer 5 during the relative movement of the first portion 1 and the second portion 2.

Further, the end cover 11 is rigidly connected with the support member 6, and the support member 6 and the end cover 11 can be fixedly connected by adopting a connection mode such as bolts, screws and the like, so that the effect of fixedly assembling the end cover 11 and the support member 6 is achieved.

The end cover 11 has an assembly hole adapted to the vehicle body, and the effect of fixedly connecting the end cover 11 to the vehicle body can be achieved by adopting an assembly mode such as bolting, and the effect of fixedly assembling the shock absorber 100 to the vehicle can be achieved by assembling and matching the end cover 11 with the vehicle body. Further, the plurality of assembly holes are suitable for being matched with the vehicle body, so that the end cover 11 is fixedly connected with the vehicle body through the plurality of bolts, the connection strength of the shock absorber 100 and the vehicle body is improved, the shock absorber 100 is reliably assembled on the vehicle body, and the risk of separation of the shock absorber 100 and the vehicle body is reduced.

Further, as shown in fig. 1, when the end cover 11 is placed in the direction of fig. 1, in the first direction, the line through hole 11a is configured as a through hole penetrating through the end cover 11, so that the data wire harness for connecting the sensor 8 penetrates through the end cover 11, thereby being beneficial to realizing the effect of arranging the sensor 8 in the shock absorber 100, further being beneficial to reducing the risk of pollution to the sensor 8, and improving the monitoring accuracy of the sensor 8.

Further, the sensor 8 is connected with the central processing unit of the vehicle through the data wire harness, so that the sensor 8 can convert the monitored position of the first part 1 into a corresponding position signal, the position signal is transmitted to the central processing unit through the data wire harness, and the central processing unit analyzes and processes the position signal, so that the effect that the central processing unit judges the state of the shock absorber 100 is achieved, and the effect of adjusting the length of the shock absorber 100 is achieved.

In some embodiments of the present utility model, as shown in fig. 1, the second connection part may further include a stator winding 12, where the stator winding 12 is located in the accommodating groove 211 of the cylinder 21, so as to achieve the effect that a part of the structure of the first portion 1 is located in the accommodating groove 211, and the stator winding 12 may be further fixed with the end cover 11, and the second portion 2 has a permanent magnet 22 matched with the stator winding 12, specifically, the cylinder 21 is sleeved outside the stator winding 12 and has the permanent magnet 22 matched with the stator winding 12, so as to achieve the effect that the shock absorber 100 is configured as an electromagnetic shock absorber.

Further, when the stator winding 12 is matched with the permanent magnet 22, under the condition that the stator winding 12 is electrified, the stator winding 12 and the permanent magnet 22 are electromagnetically induced to generate magnetic acting force, so that the effect of relative movement of the stator winding 12 and the permanent magnet 22 is achieved. Also, by varying the magnitude of the current input to the stator winding 12, it is possible to achieve varying the magnitude of the magnetic force generated by the stator winding 12 and the permanent magnet 22, thereby achieving the effect that the shock absorber 100 is configured as an electromagnetic shock absorber.

Further, as shown in fig. 1, the cylinder 21 is sleeved on the outer side of the stator winding 12 along the first direction, and the cylinder 21 can move relative to the stator winding 12 along the first direction, so that the second part 2 can move relative to the first part 1 along the first direction, and therefore, the length of the damper 100 can be adjusted through electromagnetic induction between the stator winding 12 and the permanent magnet 22.

In some embodiments of the present utility model, as shown in fig. 1, when the fourth limiting portion 21a abuts against the second limiting portion 4, at least a portion of the projection surface of the permanent magnet 22 coincides with the projection surface of the stator winding 12 in the second direction, so as to ensure electromagnetic induction between the stator winding 12 and the permanent magnet 22 when the damper 100 reaches the longest stroke state, and ensure the stability of the damper 100 in use.

In some embodiments of the present utility model, as shown in fig. 1, a guide channel 12a is formed on the first portion, specifically, a guide channel 12a is formed on the stator winding 12, a guide post 21b is formed in the accommodating groove 211, the guide post 21b is installed in the guide channel 12a, and the guide post 21b and the guide channel 12a are in guide fit, so that the first portion 1 and the second portion 2 relatively move along the extending direction of the guide post 21b, thereby realizing the effect of matching the second portion 2 and the first portion 1 along the first direction, and realizing the effect of adjusting the length of the damper 100.

Further, as shown in fig. 1, the guide channel 12a may be configured as a guide groove, and in the first direction, an end of the guide groove facing the guide post 21b has an opening, so that the guide post 21b is adapted to be mounted in the guide channel 12a, thereby achieving the effect of guiding engagement of the guide post 21b and the guide channel 12a, and the guide post 21b and the guide channel 12a are engaged along the first direction, which may also be understood as the guiding direction of the guide post 21b and the guide channel 12 a. Thus, the guide posts 21b and the guide channels 12a are in guide fit, so that the stator winding 12 and the cylinder 21 can move relatively in the first direction, and the first part 1 and the second part 2 can move relatively in the first direction, and the length of the damper 100 can be reduced.

Further, as shown in fig. 1, the sensor 8 is provided to the stator winding 12 and is provided close to the guide passage 12a, and the guide post 21b has a position guide rail inductively fitted with the sensor 8, the position guide rail being provided close to the sensor 8 so that the sensor 8 is adapted to inductively fit with the position guide rail. And, along the first direction, the position guide rail extends to set up. Thereby, in the process of guiding and matching the guide post 21b and the guide channel 12a, the effect of monitoring the relative position of the sensor 8 and the guide post 21b is realized through the inductive matching of the sensor 8 and the position guide rail, so that the effect that the sensor 8 is used for monitoring the relative position of the second part 2 and the first part 1 along the first direction is realized.

Further, since the sensor 8 is fixedly arranged on the stator winding 12, the position guide rail is fixedly arranged on the guide post 21b, so that the position guide rail and the guide post 21b move relative to the sensor 8 in the process of guiding and matching the guide post 21b and the guide channel 12a along the first direction, the effect of monitoring the relative positions of the position guide rail and the raster scanning head by the sensor 8 is realized, and the effect of sensing and matching the sensor 8 and the position guide rail to monitor the relative positions of the sensor 8 and the guide post 21b is realized.

Further, the sensor 8 may be configured as a raster scan head, the position guide may be configured as a raster guide, the raster scan head is inductively coupled with the raster guide, and the raster scan head monitors the relative positions of the raster guide and the raster scan head, thereby achieving the effect that the sensor 8 is inductively coupled with the position guide to monitor the relative positions of the sensor 8 and the guide posts 21 b.

In some embodiments of the present utility model, as shown in fig. 1, a routing channel 12b is formed on the first portion 1, specifically, the stator winding 12 may be formed with the routing channel 12b, and the routing channel 12b communicates with the line passing hole 11 a.

Further, as shown in fig. 1, the sensor 8 is located at one end of the routing channel 12b away from the line passing hole 11a, and a data wire harness for connecting the sensor 8 may pass through the routing channel 12b and the line passing hole 11a to achieve the effect that the data wire harness passes through the shock absorber 100, one end of the data wire harness is connected with the sensor 8, and the other end of the data wire harness is connected with the central processor of the vehicle, thereby, the stator winding 12 is provided with the routing channel 12b, and the routing channel 12b is communicated with the line passing hole 11a to achieve the effect that the data wire harness passes through the shock absorber 100, thereby achieving the effect that the sensor 8 disposed in the shock absorber 100 is connected with the central processor through the data wire harness, so that the sensor 8 transmits the monitored position signal to the central processor.

In some embodiments of the present utility model, shock absorber 100 may further comprise: and the power wire harness is used for electrically connecting the stator winding 12 with a power supply device of the vehicle so as to realize the effect of energizing the stator winding 12, thereby being beneficial to realizing the effect of electromagnetic induction generated by the stator winding 12 and the permanent magnet 22.

Further, one end of the power wire harness is connected with the stator winding 12, the other end of the power wire harness is connected with the power supply device, and the power wire harness is suitable for penetrating the wiring channel 12b and the line, so that the power supply device is electrically connected with the stator winding 12 arranged in the damper 100, and the effect of energizing the stator winding 12 is achieved.

Further, by varying the magnitude of the current of the stator winding 12, the effect of adjusting the length of the damper 100 is achieved. And the central processing unit is suitable for being connected with external sensing equipment of the vehicle, the external sensing equipment can acquire information such as road surface state, vehicle speed, vehicle acceleration and the like, the external sensing equipment converts the information such as road surface state, vehicle speed, vehicle acceleration and the like into corresponding information signals and transmits the corresponding information signals to the central processing unit, the central processing unit calculates and processes the information signals to form control signals, the central processing unit sends the control signals to an execution end of the vehicle, and the execution end controls the current magnitude of the input stator winding 12 of the power supply device, so that the length of the shock absorber 100 is adjusted, the effect of actively adjusting the size of a vehicle body ground clearance of the vehicle is achieved, and driving feeling of a user is improved.

In some embodiments of the present utility model, as shown in fig. 1, the vent hole 13a is provided with a filter member 7, the filter member 7 is covered on the vent hole 13a, and the filter member 7 is used for filtering air flowing through the vent hole 13a, so as to avoid the risk of soil, stones and other objects entering the interior of the damper 100 from the vent hole 13a, improve the use stability of the damper 100, and reduce the risk of failure of the damper 100.

In some embodiments of the present utility model, the filter element 7 may be a filter screen, the filter element 7 may also be a filter element, and the filter element 7 may also have water blocking properties, which is beneficial to reduce the risk of liquid entering the interior of the shock absorber 100 through the filter element 7, improve the stability of the shock absorber 100 in use, and reduce the risk of failure of the shock absorber 100. For example, in the process that the vehicle runs through the mud pit, mud water stored in the mud pit is easy to splash, and the filter 7 is arranged at the vent hole 13a, so that the splash mud water is prevented from entering the shock absorber 100, the influence of the mud water on the stator winding 12 and the permanent magnet 22 arranged in the shock absorber 100 is avoided, the effect of improving the use stability of the shock absorber 100 is achieved, and the risk of failure of the shock absorber 100 is reduced.

In some embodiments of the present utility model, as shown in fig. 1, the second limiting portion 4 is sleeved on the outer side of the cylinder 21 and is fixedly arranged on the damper housing 13.

In some embodiments of the present utility model, as shown in fig. 1, the end of the damper housing 13 remote from the support 6 is formed with a mounting flange 13c folded toward the cylinder 21, and the second stopper 4 is mounted to the mounting flange 13c.

In some embodiments of the present utility model, as shown in fig. 1, the outer peripheral wall of the second limiting portion 4 has a third mounting groove 42, and the mounting flange 13c is mounted in the third mounting groove 42.

Further, the third mounting groove 42 is configured as a groove structure recessed toward the inside of the second limiting portion 4, so that when the second limiting portion 4 is fitted with the mounting flange 13c, the mounting flange 13c is mounted in the third mounting groove 42, so that in the first direction, the effect that the mounting flange 13c restricts the movement of the second portion 2 relative to the damper housing 13 is achieved, and the second limiting portion 4 is reliably mounted to the damper housing 13.

In some embodiments of the present utility model, as shown in fig. 1, the cylinder 21 has a connection arm 21c, and the connection arm 21c is adapted to be connected with a wheel to achieve the effect of connecting the wheel with the shock absorber 100, and by adjusting the length of the shock absorber 100, the effect of changing the size of the ground clearance of the vehicle body is achieved, and the shock absorber 100 can absorb the generated force of the wheel on the vehicle body, thereby improving the running performance of the vehicle.

According to the vehicle of the embodiment of the utility model, the vehicle comprises the shock absorber 100 of the embodiment, and the vehicle adopting the shock absorber 100 of the embodiment of the utility model is beneficial to improving the running performance of the vehicle.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (20)

1. A shock absorber, comprising:

a first portion having a first limit portion and a second limit portion;

the second part comprises a cylinder body, the part structure of the first part is positioned in the cylinder body, the first part and the second part can move relatively, the second part is provided with a third limiting part and a fourth limiting part, at least one of the third limiting part and the fourth limiting part is positioned on the outer side of the cylinder body, the third limiting part is suitable for being in butt joint with the first limiting part to enable the shock absorber to have a first limiting position, and the fourth limiting part is suitable for being in butt joint with the second limiting part to enable the shock absorber to have a second limiting position.

2. The shock absorber of claim 1 wherein said cylinder is of an open configuration and a portion of said first portion is movable from said cylinder to outside said cylinder.

3. The shock absorber of claim 1 wherein said barrel has a side wall extending in a direction of relative movement of said first portion and said second portion, said fourth stop and at least a portion of said first portion being structured to be located on either side of said side wall.

4. A shock absorber according to claim 3, wherein a top wall of the barrel is formed as the third limit portion.

5. The shock absorber of claim 1 wherein at least one of said first stop portion and said third stop portion is an elastic member and/or; at least one of the second limiting part and the fourth limiting part is an elastic piece.

6. A shock absorber according to claim 3, further comprising: and one end of the elastic buffer piece is fixed on the first part, and the other end of the elastic buffer piece is arranged on the second part.

7. The shock absorber according to claim 6, wherein said fourth stopper portion is configured as a mounting portion of the other end of said elastic cushion.

8. The shock absorber of claim 6 wherein said first portion has a support member, a surface of said support member opposite said elastic cushioning member being provided with a first mounting groove, said one end of said elastic cushioning member being mounted within said first mounting groove.

9. The shock absorber according to any of claims 3-8, wherein said first portion comprises a first connection portion and a second connection portion, said first connection portion being connected to said second connection portion, said first connection portion being adapted to be connected to a vehicle body, a portion of said second connection portion being located within said barrel;

the first connecting portion comprises a shell, the shell is arranged on the outer side of at least part of the second portion, and the second limiting portion is arranged on the shell.

10. The shock absorber of claim 9 wherein said second stop is formed at a bottom of said housing and said second stop is located below said first stop in a direction in which said first portion moves relative to said second portion.

11. The shock absorber of claim 10, wherein a side of the fourth limit portion facing the second limit portion is provided with an elastic member.

12. The shock absorber of claim 9 wherein said housing has a vent.

13. The shock absorber of claim 12 wherein said vent is provided with a filter.

14. The shock absorber of claim 1 wherein said first portion has a first mounting hole, an inner peripheral wall of said first mounting hole having a mounting boss, an outer peripheral wall of said first spacing portion having a second mounting groove, said mounting boss mating with said second mounting groove to secure said first spacing portion to said first portion.

15. The shock absorber of claim 14 wherein said first stop portion has a guide ramp adapted for guided engagement with said mounting boss to mount said first stop portion to said first portion support member.

16. The shock absorber of claim 1 wherein said first portion includes a stator winding and said second portion has a permanent magnet mated with said stator winding.

17. A shock absorber according to claim 1 or 16, wherein the first portion has a routing channel formed therein.

18. The shock absorber of claim 1 wherein said first portion defines a guide channel and said barrel defines a guide post therein, said guide post being mounted within said guide channel for guided engagement by said guide post and said guide channel for relative movement of said first portion and said second portion in a direction in which said guide post extends.

19. The shock absorber of claim 1 wherein said second portion has a connecting arm adapted to connect with a wheel.

20. A vehicle comprising a shock absorber according to any one of claims 1-19.