Tensioning type shock absorber for motorcycle

Abstract

The tensioning type shock absorber comprises a shock absorbing piece and a four-connecting-rod assembly, the four-connecting-rod assembly is composed of four connecting rods which are hinged end to end in a single-freedom-degree mode, when the tensioning type shock absorber is used, the upper end of the four-connecting-rod assembly is hinged to a set position of a motorcycle frame in a single-freedom-degree mode, and the lower end of the four-connecting-rod assembly is hinged to a wheel axle in a single-freedom-degree mode. Two ends of the damping part are respectively connected between front and rear connecting rods of the four-connecting-rod assembly; according to the tensioning type shock absorber for the motorcycle, the two ends of the shock absorption piece are hinged to the front end and the rear end of the four-connecting-rod assembly respectively, so that stress can be decomposed, the shock absorption piece is subjected to axial acting force, the damage probability of the shock absorption piece is reduced, and the service life of the shock absorber is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorption, and particularly to a tension type shock absorber for a motorcycle. Background Art

[0002] A shock absorber is a device for accelerating the attenuation of the vibration of a vehicle frame and a vehicle body to improve the ride comfort of the vehicle. A shock absorber mainly consists of a spring and a damper. The damper is used to suppress the oscillation when the spring rebounds after absorbing shock and the impact from the road surface. When passing through an uneven road surface, although the shock absorption spring can filter the vibration of the road surface, the spring itself will still have reciprocating motion, and the damper in the shock absorber is used to suppress this spring bounce. The damper generally includes a piston assembly. When the shock absorber is installed on the motorcycle frame and starts to work, due to the forces acting on the wheel from various directions during the movement of the wheel, the force on the shock absorber is complex, and the friction between the piston and the cylinder block is large during operation, resulting in easy wear of the piston and the piston rod, and damage to the shock absorber.

[0003] Therefore, it is necessary to improve the structure of the shock absorber in the prior art, which can improve the shock absorption effect, solve the problem that the force on the shock absorber in the prior art is complex, resulting in easy wear of the piston assembly, and thus can extend the service life of the shock absorber. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a tension type shock absorber for a motorcycle, which can improve the shock absorption effect, solve the problem that the force on the shock absorber in the prior art is complex, resulting in easy wear of the piston assembly, and thus can extend the service life of the shock absorber.

[0005] The tension type shock absorber for a motorcycle of the present invention includes a shock absorbing member and a four-link assembly. The four-link assembly is composed of four links that are single-degree-of-freedom hinged to each other end to end. When in use, the upper end of the four-link assembly is single-degree-of-freedom hinged to a set position on the motorcycle frame, and the lower end is single-degree-of-freedom hinged to the wheel axle. Both ends of the shock absorbing member are respectively connected between the front and rear links of the four-link assembly.

[0006] Further, both ends of the shock absorbing member are respectively connected to the front and rear hinged positions of the links of the four-link assembly.

[0007] Further, both ends of the shock absorbing member are single-degree-of-freedom hinged to the four-link assembly.

[0008] Further, the link includes a rod body and a hinged portion. The hinged portions of two adjacent links are respectively a hinged groove and a hinge head. The hinge head is inserted into the hinged groove to form a hinge.

[0009] Further, the hinge head and the hinged groove have a set constraint area in the hinged rotation direction, and the rod body is tubular.

[0010] Furthermore, a shock-absorbing layer is provided between the side wall of the hinge joint and the hinge groove;

[0011] The hinge joint and the hinge groove are hinged by a hinge shaft, and a shock-absorbing bushing is sleeved outside the hinge shaft.

[0012] Furthermore, the shock-absorbing member includes a damping member and a shock-absorbing spring sleeved outside the damping member. When the damping member is stretched, the shock-absorbing spring is compressed;

[0013] Or, when the damping member is stretched, the shock-absorbing spring is stretched.

[0014] Furthermore, damping member hinge seats are fixedly provided on the connecting rods corresponding to both ends of the damping member, and both ends of the damping member are respectively hinged to the corresponding hinge seats.

[0015] Furthermore, the damping member includes a sleeve, a cylinder block and a piston assembly. One end of the sleeve and one end of the cylinder block are respectively hinged to the corresponding hinge seats. One end of the cylinder block is slidably arranged in the sleeve. The piston assembly is located in the sleeve. The piston assembly includes a piston rod and a piston connected to one end of the piston rod. The other end of the piston rod is connected to the sleeve;

[0016] The sleeve is provided with a plurality of sliding grooves, and a plurality of sliding assemblies are provided on the outer wall of one end of the cylinder block located in the sleeve and are matched with the plurality of sliding grooves. The plurality of sliding assemblies respectively extend out of the plurality of sliding grooves and can be driven to slide along the sliding grooves.

[0017] Furthermore, an installation assembly is threadedly connected to the outer wall of the rear end of the sleeve. The installation assembly includes a spring seat I and a fixed seat. The sliding assembly is close to the front end of the sleeve and is arranged opposite to the installation assembly. The sliding assembly includes a fixed block and a spring seat II arranged on the fixed block. One end of the shock-absorbing spring is connected to the spring seat II of one of the sliding assemblies, and the other end of the shock-absorbing spring is connected to the spring seat I.

[0018] Advantages of the present invention: The tension-type shock absorber for a motorcycle of the present invention, when in use, the shock-absorbing member is installed on the motorcycle through a four-link assembly. Both ends of the shock-absorbing member are connected between the front and rear connecting rods of the four-link assembly. Thus, when the shock-absorbing member is moving, the four-link assembly can decompose the external acting force, so that the shock-absorbing member receives the acting force from the axial direction, reducing the probability of damage to the shock-absorbing member and prolonging the service life of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments:

[0020] Figure 1 is a schematic structural diagram of the shock absorber of the present invention;

[0021] Figure 2 Structural schematic diagram of shock absorber

[0022] Figure 3 Cross-sectional view when the upper end of the four-link assembly is installed on the motorcycle steering column

[0023] Figure 4 For Figure 1 Structural sketch

[0024] Figure 5 Structural sketch of the shock absorber when there are three shock absorbers

[0025] Figure 6 Structural schematic diagram of the sleeve

[0026] Figure 7 For Figure 6 Cross-sectional view in the A-A direction in

[0027] Figure 8 Structural schematic diagram of the cylinder block

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 1. Connecting rod; 101. Hinge part; 102. Hinge seat; 2. Shock absorber; 201. Sleeve; 202. Cylinder block; 203. Shock spring; 204. Slide groove; 205. Spring seat I; 206. Fixed seat; 207. Locking part; 208. Fixed block; 209. Spring seat II; 210. Mounting seat I; 211. Mounting seat II; 212. Piston rod; 3. Connecting rod I; 4. Connecting rod II; 5. Connecting rod III; 6. Connecting rod IV; 7. Steering column; 8. Hinge shaft; 9. Locking nut; 10. Shock layer; 11. Shock bushing Detailed implementation mode

[0030] Figure 1 Structural schematic diagram of the shock absorber of the present invention Figure 2 Structural schematic diagram of the shock absorber Figure 3 Cross-sectional view when the upper end of the four-link assembly is installed on the motorcycle steering column Figure 4 For Figure 1 Structural sketch Figure 5 Structural sketch of the shock absorber when there are three shock absorbers Figure 6 Structural schematic diagram of the sleeve Figure 7 For Figure 6 Cross-sectional view in the A-A direction in Figure 8 Structural schematic diagram of the cylinder block, as Figures 1 - 8As shown: The tension-type shock absorber for a motorcycle in this embodiment includes a shock-absorbing member 2 and a four-link assembly. The four-link assembly is composed of four links 1 that are hinged to each other at the head and tail with a single degree of freedom. When in use, the upper end of the four-link assembly is hinged to a set position on the motorcycle frame with a single degree of freedom, and the lower end is hinged to the wheel axle with a single degree of freedom. The two ends of the shock-absorbing member 2 are respectively connected between the front and rear links 1 of the four-link assembly.

[0031] In this structure, up and down refer to the up and down direction relative to Figure 1 or the up and down direction of the motorcycle. Front and rear refer to Figure 1 the left and right direction in

[0032] or the front and rear direction of the motorcycle. The single degree of freedom means that it will only rotate around the hinge axis and will not shift, such as shifting in the left and right direction relative to the motorcycle; the shock-absorbing member 2 has a pre-tightening force that resists front and rear stretching. The four-link assembly forms a rhombus structure. When the tension-type shock absorber forms the front shock absorber of the motorcycle, the upper end of the four-link assembly is hinged to the steering column 7 of the motorcycle with a single degree of freedom, and the lower end of the four-link assembly is hinged to the front wheel axle with a single degree of freedom. When the tension-type shock absorber forms the rear shock absorber of the motorcycle, the upper end of the four-link assembly is hinged to the motorcycle frame with a single degree of freedom, and the lower end of the four-link assembly is hinged to the rear wheel axle with a single degree of freedom. Figure 1 As shown, the two ends of the shock-absorbing member 2 are respectively hinged to the front and rear ends of the four-link assembly (i.e., near the front and rear two hinge points of the four-link assembly). The shock-absorbing member 2 is generally a spring-damper shock absorber, which generally includes a cylinder block 202, a piston assembly, a shock-absorbing spring 203 and other structures. This is the application of existing technology and will not be elaborated here. When the wheel is subjected to an external force and the wheel axle lifts upward, at this time, the four-link assembly is compressed and the force is decomposed, so that the shock-absorbing member 2 receives an axial force, which can improve the shock-absorbing effect. At the same time, when the piston assembly moves, the friction and collision with the inner wall of the cylinder block 202 can be greatly reduced, the probability of damage to the shock-absorbing member 2 can be reduced, and the service life of the shock absorber can be extended. During the shock-absorbing process, the four-link assembly can also play a certain role in shock-absorbing and buffering, thereby further improving the shock-absorbing effect.

[0033] Specifically, Link Ⅰ 3, Link Ⅱ 4, Link Ⅲ 5 and Link Ⅳ 6 are hinged to each other at the head and tail with a single degree of freedom to form a four-link assembly. Multiple shock-absorbing members 2 can be set according to the use requirements, such as Figure 5As shown, three shock absorbers 2 can be provided. The three shock absorbers 2 are located within the accommodation space formed by the four-link assembly and are spaced apart in the up-and-down direction of the four-link assembly. The first shock absorber 2 is located in an upper position relative to the middle of the four-link assembly, and its two ends are respectively hinged to the hinge ears in the middle of link Ⅰ 3 and link Ⅳ 6. The second shock absorber 2 is located in the middle of the four-link assembly, and its two ends are respectively hinged near the hinge joints of link Ⅰ 3 and link Ⅱ 4 and near the hinge joints of link Ⅲ 5 and link Ⅳ 6. The third shock absorber 2 is located in a lower position relative to the middle of the four-link assembly, and its two ends are respectively hinged to the hinge ears in the middle of link Ⅱ 4 and link Ⅲ 5, so as to further improve the shock absorption effect. Of course, preferably, one shock absorber 2 is provided, and the shock absorber 2 is installed in the middle of the four-link assembly.

[0034] In this embodiment, the two ends of the shock absorber 2 are respectively connected to the front and rear hinge positions of link 1 of the four-link assembly. The two ends of the shock absorber 2 can be hinged to the front and rear hinge positions of the links of the four-link assembly, that is, near the hinge joints of link Ⅰ 3 and link Ⅱ 4 and near the hinge joints of link Ⅲ 5 and link Ⅳ 6. Or when the shock absorber 2 is a shock-absorbing spring, the two ends can be directly connected to near the hinge joints of link Ⅰ 3 and link Ⅱ 4 and near the hinge joints of link Ⅲ 5 and link Ⅳ 6. That is, the connection method of the shock absorber 2 to the four-link assembly can be set according to the structure of the shock absorber 2.

[0035] In this embodiment, the two ends of the shock absorber 2 are hinged to the four-link assembly with single degree of freedom. In this structure, the two ends of the shock absorber 2 are hinged to the four-link assembly with single degree of freedom, so that when the shock absorber 2 rotates, it rotates around the hinge axis, thus preventing deviation and avoiding interference with other parts of the vehicle body.

[0036] In this embodiment, the link 1 includes a rod body and a hinge portion 101. The hinge portions 101 of two adjacent links 1 are respectively a hinge groove and a hinge head. The hinge head is inserted into the hinge groove to form a hinge. The hinge groove is a U-shaped open groove. The link is of a three-section structure. Hinge holes for the hinge shaft 8 to pass through are provided on the hinge groove and the hinge head. The hinge portion 101 is provided at both ends of the rod body. Preferably, the hinge head of link Ⅰ 3 is inserted into the hinge groove of link Ⅱ 4 to form a hinge, the hinge head of link Ⅱ 4 is inserted into the hinge groove of link Ⅲ 5 to form a hinge, the hinge head of link Ⅲ 5 is inserted into the hinge groove of link Ⅳ 6 to form a hinge, and the hinge head of link Ⅳ 6 is inserted into the hinge groove of link Ⅰ 3 to form a hinge. Thus, the overall structure is simple. Compared with the hinge portions 101 of two adjacent links being arranged side by side to form a hinge, the lateral (relative to the left-right direction of the motorcycle) dimension of the four-link assembly can be reduced, saving installation space.

[0037] In this embodiment, the hinge joint and the hinge groove have a set constraint area in the hinge rotation direction, and the rod body is tubular. The cross-section of the hinge portion 101 is a quasi-droplet-shaped structure (the top of the droplet shape is truncated to form a quasi-droplet shape). The width of the quasi-droplet shape gradually increases along the extension direction of the rod body, that is, the so-called constraint area. The hinge portion 101 has set dimensions in the length and width directions, which can prevent the hinge portion 101 from deflecting. Thus, when the four-link assembly is compressed or restored to its original state, it can limit the movement of the hinge portion 101 in the left and right directions, so that when the four-link assembly moves, the hinge portion 101 will not shift during rotation, that is, it will not shift in other directions of the motorcycle, such as shifting in the left and right directions, avoiding interference with other components of the motorcycle during the movement process.

[0038] In this embodiment, a shock-absorbing layer 10 is provided between the side walls of the hinge joint and the hinge groove; in this structure, the shock-absorbing layer 10 is made of polytetrafluoroethylene material, which has the effects of wear resistance and self-lubrication, and can be directly vulcanized on the outer side wall of the hinge joint or / and the inner side wall of the hinge groove, thereby playing a certain role in reducing friction.

[0039] The hinge joint and the hinge groove are hinged through a hinge shaft 8, and a shock-absorbing bushing 11 is sleeved outside the hinge shaft 8. The shock-absorbing bushing 11 can be a metal bushing or a plastic bushing, which is an application of the prior art and will not be elaborated here. The hinge shaft 8 is a bolt shaft, and the bolts pass through the hinge holes on the hinge portion 101 one by one and are fixed by lock nuts 9 to form a hinge. The shock-absorbing bushing 11 is located in the hinge hole. The hinge shaft 8 at the lower part of the four-link assembly is a wheel shaft. The cooperation relationship among the hinge shaft 8, the lock nut 9, and the hinge portion 101 can be referred to as Figure 3 shown in Figure 3 a cross-sectional view when the four-link assembly is hinged to the steering column 7.

[0040] In this embodiment, the shock-absorbing member 2 includes a damping member and a shock-absorbing spring 203 sleeved outside the damping member; in this structure, when the two ends of the shock-absorbing spring 203 are installed on the damping member, when the damping member is stretched, the shock-absorbing spring 203 is compressed, that is, the two ends of the damping member extend in the left and right directions relative to Figure 1 and the two ends of the shock-absorbing spring 203 are compressed in the left and right directions relative to Figure 1 to achieve vibration damping;

[0041] Alternatively, when the damping member is stretched, the shock-absorbing spring 203 is stretched. When the two ends of the shock-absorbing spring 203 are installed on the four-link assembly, when the damping member is stretched, the shock-absorbing spring 203 is also stretched, thereby achieving vibration damping.

[0042] In this embodiment, damping member hinge seats 102 are fixedly provided at both ends of the link 1 corresponding to both ends of the damping member, and both ends of the damping member are respectively hinged to the corresponding hinge seats 102. The hinge seat 102 includes hinge seat I and hinge seat II. Hinge holes are provided on hinge seat I and hinge II. A hinge slot can be formed on hinge seat I and hinge seat II to form a hinge, or hinge seat I and hinge seat II are plate-like structures and hinge holes are provided to directly form a hinge with the damping member. Of course, the hinge is formed by a hinge shaft 8 and a nut. Hinge seat I is arranged on the hinge portion 101 of link II 4 (close to the hinge portion 101 of link I 3), and hinge seat II is arranged on the hinge portion 101 of link III 5 (close to the hinge portion 101 of link IV 6), so that the overall structure is compact.

[0043] In this embodiment, the damping member includes a sleeve 201, a cylinder block 202 and a piston assembly. One end of the sleeve 201 and one end of the cylinder block 202 are respectively hinged to the corresponding hinge seats 102. One end of the cylinder block 202 is slidably arranged in the sleeve 201. The piston assembly is located in the sleeve 201. The piston assembly includes a piston rod 212 and a piston connected to one end of the piston rod 212. The other end of the piston rod 212 is connected to the sleeve 201. The piston assembly is hermetically connected to the cylinder block 202. The piston is located in the cylinder block 202. One end of the piston rod 212 extends into the cylinder block 202 to be connected to the piston. The matching structure and manner of the piston assembly and the cylinder block 202 are applications of the prior art and will not be elaborated here. An installation seat I 210 is provided at one end of the sleeve 201. One end of the sleeve 201 is open. An installation seat II 211 is provided at the end of the cylinder block 202 located outside the sleeve 201. The installation seat I 210 and the installation seat II 211 are respectively hinged to hinge seat I and hinge seat II.

[0044] The sleeve 201 is provided with a plurality of sliding grooves 204. The outer wall of one end of the cylinder block 202 located in the sleeve 201 is provided with a plurality of sliding components that cooperate with the plurality of sliding grooves 204. The plurality of sliding components respectively extend out of the plurality of sliding grooves 204 and can be driven to slide along the sliding grooves 204. The sliding grooves 204 are axially provided along the sleeve 201 and are arranged at intervals in the circumferential direction of the sleeve 201. A sliding component is provided on the outer wall of one end of the cylinder block 202 close to hinge seat I. The sliding component extends out of the sleeve 201. When the damping member extends, the sliding component is driven to slide along the sliding groove 204.

[0045] In this embodiment, an installation component is threadedly connected to the outer wall of the rear end of the sleeve 201. The installation component includes a spring seat I 205 and a fixed seat 206. The sliding component is close to the front end of the sleeve 201 and is disposed opposite to the installation component. The sliding component includes a fixed block 208 and a spring seat II 209 provided on the fixed block 208. One end of the shock-absorbing spring 203 is connected to the spring seat II 209 of one of the sliding components, and the other end of the shock-absorbing spring 203 is connected to the spring seat I 205. One end of the shock-absorbing spring 203 is connected to the spring seat I 205, and the other end of the shock-absorbing spring 203 is installed on the spring seat II 209. Thus, when the damper extends, the end of the shock-absorbing spring 203 connected to the spring seat II 209 moves to the right (backward relative to the motorcycle) along with the cylinder block 202, and the end of the shock-absorbing spring 203 connected to the spring seat I 205 moves to the left (forward relative to the motorcycle) along with the piston rod 212. Therefore, when the damper extends, the shock-absorbing spring 203 is compressed. The installation component further includes a locking member 207, which can be a structure similar to a nut. The spring seat I 205, the fixed seat 206, and the locking member 207 are arranged in sequence (the spring seat I 205, the fixed seat 206, and the locking member 207 are all annular structures and are threadedly connected to the threads provided on the outer wall of the sleeve 201). The spring seat I 205 and the spring seat II 209 are disposed opposite to each other. A plurality of sliding components are arranged at intervals along the circumferential direction of the sleeve 201, and the number is the same as that of the sliding grooves 204.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A tension type shock absorber for a motorcycle, characterized in that: It includes a shock absorber and a four-bar linkage assembly. The four-bar linkage assembly is composed of four linkages that are hinged to each other end to end with a single degree of freedom. When in use, the upper end of the four-bar linkage assembly is hinged to a set position of the motorcycle frame with a single degree of freedom, and the lower end is hinged to the wheel axle with a single degree of freedom. The two ends of the shock absorber are respectively connected between the front and rear linkages of the four-bar linkage assembly.

2. The tension type shock absorber for a motorcycle according to claim 1, wherein: The two ends of the shock absorber are respectively connected to the front and rear hinged positions of the linkages of the four-bar linkage assembly.

3. The tension type shock absorber for motorcycle according to claim 1, characterized in that: The two ends of the shock absorber are hinged to the four-bar linkage assembly with a single degree of freedom.

4. The tension type shock absorber for motorcycle according to claim 3, characterized in that: The linkage includes a rod body and a hinged portion. The hinged portions of two adjacent linkages are respectively a hinged groove and a hinge head. The hinge head is inserted into the hinged groove to form a hinge.

5. The tension type shock absorber for motorcycle according to claim 4, characterized in that: The hinge head and the hinged groove have a set constraint area in the hinged rotation direction, and the rod body is tubular.

6. The tension type shock absorber for a motorcycle according to claim 5, characterized in that: A shock-absorbing layer is provided between the side walls of the hinge head and the hinged groove; The hinge head and the hinged groove are hinged by a hinge shaft, and a shock-absorbing bushing is sleeved outside the hinge shaft.

7. The tension-type shock absorber for a motorcycle according to claim 5, characterized in that: The shock absorber includes a damping member and a shock-absorbing spring sleeved outside the damping member. When the damping member is stretched, the shock-absorbing spring is compressed; Or, when the damping member is stretched, the shock-absorbing spring is stretched.

8. The tension-type shock absorber for a motorcycle according to claim 5, characterized in that: Damping member hinge seats are fixedly provided on the linkages corresponding to the two ends of the damping member, and the two ends of the damping member are respectively hinged to the corresponding hinge seats.

9. The tension type shock absorber for a motorcycle according to claim 8, characterized in that: The damping member includes a sleeve, a cylinder block and a piston assembly. One end of the sleeve and one end of the cylinder block are respectively hinged to the corresponding hinge seats. One end of the cylinder block is slidably arranged in the sleeve. The piston assembly is located in the sleeve. The piston assembly includes a piston rod and a piston connected to one end of the piston rod. The other end of the piston rod is connected to the sleeve; The sleeve is provided with a plurality of sliding grooves. The outer wall of one end of the cylinder block located in the sleeve is provided with a plurality of sliding components that cooperate with the plurality of sliding grooves. The plurality of sliding components respectively extend out of the plurality of sliding grooves and can be driven to slide along the sliding grooves.

10. The tension type shock absorber for motorcycle according to claim 9, characterized in that: The outer wall of the rear end of the sleeve is threadedly connected with an installation component. The installation component includes a spring seat I and a fixed seat. The sliding component is close to the front end of the sleeve and is arranged opposite to the installation component. The sliding component includes a fixed block and a spring seat II arranged on the fixed block. One end of the shock-absorbing spring is connected to the spring seat II of one of the sliding components, and the other end of the shock-absorbing spring is connected to the spring seat I.

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