CN201800836U - Link mechanism capable of adjusting seat cushion height of off-road motorcycle - Google Patents

Abstract

The utility model discloses a connecting rod mechanism capable of adjusting the height of an off-road motorcycle seat cushion, comprising a vehicle frame (7), a rear fork (4), a rear shock absorber (5), a rear fork (4) and a vehicle frame (7), the top of the rear shock absorber (5) is connected to the vehicle frame (7), and the bottom of the rear fork (4) is hinged with a symmetrical triangular link (2), and the symmetrical triangular link ( 2) A camshaft (1) is installed on the camshaft mounting hole (14), and symmetrical connecting rods (3) are respectively hinged on the connecting rod mounting holes (13) on both sides of the camshaft (1). The other end of bar (3) is correspondingly hinged on the vehicle frame link (6) of vehicle frame (7), and the bottom of rear shock absorber (5) is hinged on the symmetrical triangular link (2). After adopting the above structure, the defect of inconvenient adjustment of the height of the seat cushion is solved, and has the advantages of simple and reasonable structure, convenient adjustment of the height of the seat cushion, and comfortable riding.

Description

A Link Mechanism for Adjusting the Height of Off-Road Motorcycle Seat Cushion

technical field

The utility model relates to an off-road motorcycle seat cushion adjustment mechanism, in particular to a connecting rod mechanism capable of adjusting the height of the off-road motorcycle seat cushion.

Background technique

Since the advent of motorcycles, it has brought great convenience to consumers' transportation and life. However, with the development of the economy and the continuous change of consumers' consumption concepts, they have a new understanding of the role and requirements of motorcycles. Consumption In addition to being used as a means of transportation, motorcycles also require good power performance and off-road effects. Therefore, off-road motorcycles are more and more popular among ordinary consumers. With the promotion of motorcycle races, more and more ordinary consumers begin to participate in Motocross.

At present, the height of the seat cushion of ordinary civil motorcycles is generally between 750-800 mm, of which 760-780 mm is the most, while the height of the seat cushion of off-road motorcycles is generally above 850 mm, and the height of off-road motorcycles with large displacement is 900 mm. above. Since the motorcycle seat cushion and off-road motorcycle seat cushion are fixed on the vehicle, the height of the seat cushion cannot be adjusted after leaving the factory. Such a seat cushion height requires relatively high height and skills for the riders. As far as the seat cushion is concerned, it is impossible to adjust the height of the seat cushion to meet the most suitable riding height for each consumer. Due to the uncomfortable riding posture, long-term riding will cause symptoms of backache and back pain, and even cause driving safety. For this reason, many manufacturers and people of insight have all carried out development and research, but do not have comparatively reasonable product to come out so far.

Contents of the invention

In order to overcome the above-mentioned problems existing in existing off-road motorcycles, the purpose of this utility model is to provide a kind of linkage mechanism that can adjust the height of the off-road motorcycle seat cushion with simple and reasonable structure, convenient height adjustment of the seat cushion, and comfortable riding.

The technical scheme adopted by the utility model to solve its technical problems includes a vehicle frame, a rear flat fork, and a rear shock absorber. The rear flat fork is connected with the vehicle frame, and the upper part of the rear shock absorber is connected with the vehicle frame. A symmetrical triangular connecting rod is hinged under the fork, and a camshaft is installed on the camshaft mounting hole of the symmetrical triangular connecting rod. Symmetrical connecting rods are respectively hinged on the connecting rod mounting holes on both sides of the camshaft. The other end of the corresponding hinge is hinged on the frame connecting piece of the vehicle frame, and the lower part of the rear shock absorber is hinged on the symmetrical triangular connecting rod.

The two ends of the camshaft are provided with symmetrical eccentric cylinders, the inner side of the eccentric cylinder is provided with a limit step, and an up and down adjustment surface is provided between the two limit steps.

The camshaft mounting hole of the triangular connecting rod is provided with a locking groove, the locking groove is provided with a locking screw, and the camshaft mounting hole of the triangular connecting rod is assembled on the eccentric cylinder of the camshaft.

After adopting the above structure, the utility model has the following advantages and effects compared with the prior art: one is to use the eccentricity of the camshaft to adjust the relative position of the triangular connecting rod and the connecting rod by rotating the angle of the camshaft, and finally make the rear The position among the shock absorber, the frame, and the rear fork is changed, thereby changing the angle between the rear fork and the whole vehicle system. Since the structure and size of the rear fork are fixed, the change of the angle of the rear fork will cause the whole vehicle system to rotate around the front axle, which in turn will cause the whole vehicle system to rise or fall, so as to achieve the purpose of adjusting the height of the seat cushion;

The second is that the angle of the rear shock absorber of the motorcycle can also be changed through the above-mentioned adjustment, so as to improve the comfort of the whole vehicle.

The 3rd, adjustment method is simple and convenient, and general consumer can carry out, and this is conducive to off-road motorcycle, especially the off-road motorcycle of large displacement is popularized and used to general consumer.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the decomposition structure of the utility model.

Fig. 3 is a structural schematic diagram of the linkage mechanism of the utility model cooperating with each other.

Fig. 4 is a perspective view of the camshaft of the present invention.

Fig. 5 is a comparative schematic diagram of the two states of the high position and the low position of the present invention.

Fig. 6 is a schematic diagram of a camshaft of an application example.

Fig. 7 is a schematic diagram of an application example of a triangular connecting rod.

Fig. 8 is a schematic diagram of a connecting rod of an application example.

Fig. 9 is a schematic diagram of the adjustment effect of the application example.

Detailed ways

Shown in Fig. 1 to Fig. 5, it is the embodiment of a kind of link mechanism that can adjust the height of off-road motorcycle seat cushion of the present utility model, and it comprises vehicle frame 7, rear chainstay 4, rear shock absorber 5, rear chainstay 4 is connected with the vehicle frame 7, the upper part of the rear shock absorber 5 is installed on the vehicle frame 7 through the lug plate, and the lower part of the rear fork 4 is hinged with a symmetrical triangular connecting rod 2 through a bearing 8, and the symmetrical triangular connecting rod Camshaft 1 is installed on the camshaft mounting hole 14 of 2, and the connecting rod mounting holes 13 on both sides of the camshaft 1 are respectively hinged with symmetrical connecting rods 3 through bearings 8, and the other ends of the symmetrical connecting rods 3 pass through bearings 8 Correspondingly hinged on the frame connecting piece 6 of the vehicle frame 7, the lower part of the rear shock absorber 5 is hinged on the symmetrical triangular connecting rod 2 by bolts.

The two ends of described camshaft 1 are provided with symmetrical eccentric cylinder 12, and the inner side of eccentric cylinder 12 is provided with limit step 10, and limit step 10 plays positioning function, is provided with up and down adjustment surface 11 between two limit steps 10 , the up and down adjustment surface 11 is mainly used for turning the camshaft 1 when the height of the seat cushion is adjusted.

The camshaft mounting hole 14 of the triangular connecting rod 2 is provided with a locking groove, the locking groove is provided with a locking screw 9, and the camshaft mounting hole 14 of the triangular connecting rod 2 is assembled on the eccentric cylinder 12 of the camshaft 1 .

Fig. 5 is a schematic diagram showing the comparison between the high position and the low position of the seat cushion. The solid line in the figure indicates that the seat cushion is in the high position. At this time, the eccentric cylinder 12 of the camshaft 1 is located in front of the vehicle, and the upper and lower adjustment surfaces 11 are in a horizontal position. The dotted line part in the figure is that the seat cushion is in a low position, and now the eccentric cylinder 12 of the camshaft 1 is located at the rear of the car, and the up and down adjustment surface 11 is in a horizontal position. Different eccentricities of the camshaft 1, different sizes of the triangular connecting rod 2 and the connecting rod 3, and different adjustment angles of the camshaft 1 can realize different adjustment heights of the seat cushion.

Fig. 6 to Fig. 9 are the application examples of a 300cc/500cc off-road motorcycle new product of the utility model, wherein the eccentricity of the camshaft 1 is 5 mm, the hole distance of the connecting rod 3 is 146 mm, and the specific dimensions of the triangular connecting rod : The hole distances between the rear shock absorber connection hole 15, the camshaft installation hole 14 and the rear fork connection hole 16 are 82.5 millimeters and 90 millimeters in sequence, and the hole distance between the rear fork connection hole 16 and the camshaft installation hole 14 is 62.5mm. When adjusting, just loosen the fixing screw of camshaft 1 and the locking screw 9 on the triangular connecting rod 2, use a wrench to adjust the camshaft 1 to a suitable angle, and then tighten the loosened screws in sequence, when the camshaft 1 When the rotation angle is 180°, the seat cushion can achieve a height adjustment of 30 mm.

Claims (3)

1. the connecting rod mechanism of a scalable cross-country motorcycle bench height, comprise vehicle frame (7), back chain stay (4), rear shock absorber (5), back chain stay (4) is connected with vehicle frame (7), the top of rear shock absorber (5) is connected with vehicle frame (7), it is characterized in that: the below of described back chain stay (4) is hinged with symmetrical triangular connecting rod (2), on the camshaft mounting hole (14) of symmetrical triangular connecting rod (2) camshaft (1) is installed, be hinged with the connecting rod (3) of symmetry on the connecting rod mounting hole (13) of camshaft (1) both sides end face respectively, the other end correspondence of the connecting rod (3) of symmetry is hinged on the vehicle frame connecting strap (6) of vehicle frame (7), and the lower hinge of rear shock absorber (5) is on symmetrical triangular connecting rod (2).

2. the connecting rod mechanism of a kind of scalable cross-country motorcycle bench height according to claim 1, it is characterized in that: the two ends of described camshaft (1) are provided with the eccentric cylinder (12) of symmetry, the inboard of eccentric cylinder (12) is provided with limited step (10), is provided with the face of adjusting up and down (11) between two limited steps (10).

3. the connecting rod mechanism of a kind of scalable cross-country motorcycle bench height according to claim 2, it is characterized in that: the camshaft mounting hole (14) of described triangular coupling rod (2) is provided with locking slot, locking slot is provided with lock screw (9), and the camshaft mounting hole (14) of triangular coupling rod (2) is assemblied on the eccentric cylinder (12) of camshaft (1).

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