Rear suspension structure of motorcycle

Abstract

The utility model discloses a motorcycle rear suspension structure which comprises a rear fork, a left connecting pipe is arranged above a left fork pipe of the rear fork, a right connecting pipe is arranged above a right fork pipe of the rear fork, and the left connecting pipe and the right connecting pipe are arranged in a forward inclined mode. The rear end of the left connecting pipe and the rear end of the right connecting pipe are connected with the rear end of the left fork pipe and the rear end of the right fork pipe respectively, a shock absorber is arranged between the front end of the left connecting pipe and the front end of the right connecting pipe, and reinforcing pipes are arranged at the front ends of the left connecting pipe and the right connecting pipe and in the middle of the rear fork. The rear fork suspension structure has the advantages that the three reinforcing pipes are additionally arranged on the rear fork to increase strength, the two connecting pipes are additionally arranged on the rear fork to increase rigidity, a traditional face structure of the rear fork is changed into a body structure, the center rear shock absorber structure is combined, the rigidity and the strength of the rear fork suspension structure are comprehensively improved, and meanwhile stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motorcycle frame technical field, concretely relates to a motorcycle rear suspension structure. BACKGROUND

[0002] The rear fork is the main force component of the motorcycle rear suspension system, bearing the weight of the vehicle body, the power of the rear wheel drive and the tension during braking. Due to the motorcycle in the process of running will be subjected to a variety of forces, including the reaction force from the ground, the weight of the vehicle body, the impact force during driving and braking, etc., these forces make the rear flat fork need to have high strength, high rigidity to bear these complex stress conditions, if the strength and rigidity of the rear fork are not enough, it may cause the wheel positioning inaccurate, the vehicle is easy to deviate from the route in the process of running, the stability decreases, and will affect the handling performance of the vehicle, the driver may feel difficult or abnormal when turning or handling the vehicle, the handling is poor, the abnormal sound is generated, and it may also cause the performance of the brake system or other key components to be affected, increase the risk of accidents. Especially in the case of high-speed driving or emergency braking, it may cause serious safety problems, such as vehicle rollover or loss of control, increasing the risk of accidents. SUMMARY

[0003] To solve the above technical problems, the utility model provides a motorcycle rear suspension structure with high strength, high rigidity and good stability.

[0004] The technical scheme is as follows: a motorcycle rear suspension structure, comprising a rear fork, characterized in that: a left connecting pipe is arranged above the left fork pipe of the rear fork, and a right connecting pipe is arranged above the right fork pipe of the rear fork, the left connecting pipe and the right connecting pipe are inclined forward, the rear ends of the left connecting pipe and the right connecting pipe are connected with the rear ends of the left fork pipe and the right fork pipe respectively, and a shock absorber is arranged between the front ends of the left connecting pipe and the right connecting pipe. With the above structure, the left connecting pipe and the right connecting pipe are arranged on the left fork pipe and the right fork pipe of the rear fork respectively, the connecting pipe can increase the rigidity of the motorcycle rear suspension, and is connected with the shock absorber for cooperation.

[0005] As a preferred, a reinforcing pipe is arranged at the front end of the left connecting pipe and the right connecting pipe and the middle part of the rear fork. With the above structure, the reinforcing pipe can improve the strength of the motorcycle rear suspension structure.

[0006] As a preferred, the reinforcing pipe comprises two vertical pipes and a horizontal pipe, and the vertical pipe and the horizontal pipe form an "H" type structure. With the above structure, the reinforcing pipe with "H" type structure has high structural strength and good carrying capacity.

[0007] As preferred: a first connector is arranged at the rear of the left and right fork tubes, the first connector is in an acute angle structure, one end of the first connector is welded with the left or right fork tube, and the other end is welded with the left or right connecting tube. With the above structure, the connection of the rear fork and the left or right connecting tube is realized through the first connector.

[0008] As preferred: a second connector is arranged at the end of the two vertical tubes away from the middle of the rear fork, and the reinforcing tube and the left or right connecting tube are connected through the second connector. With the above structure, the connection of the reinforcing tube and the left or right connecting tube is realized through the second connector.

[0009] As preferred: a shaft is arranged between the two second connectors, and the shock absorber is arranged outside the shaft. With the above structure, the shock absorber is arranged on the rear fork through the shaft, and the shock resistance of the motorcycle rear suspension is improved.

[0010] Compared with the prior art, the motorcycle rear suspension structure has the beneficial effects that three reinforcing tubes are additionally arranged on the rear fork to increase the strength, two connecting tubes are additionally arranged to increase the rigidity, the rear fork is changed from a traditional surface structure to a body structure, and the rigidity and strength of the rear fork suspension structure are comprehensively improved, and the stability is also improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic view of the utility model;

[0012] Figure 2 is Figure 1 a front view. DETAILED DESCRIPTION

[0013] The utility model is further described below in combination with embodiments and drawings.

[0014] As Figure 1 and Figure 2 shown, a motorcycle rear suspension structure mainly comprises a rear fork 1, a left connecting tube 2 is arranged above the left fork tube 1a of the rear fork 1, a right connecting tube 3 is arranged above the right fork tube 1b of the rear fork 1, the left connecting tube 2 and the right connecting tube 3 are forwardly inclined, the rear ends of the left connecting tube 2 and the right connecting tube 3 are connected with the rear ends of the left fork tube 1a and the right fork tube 1b respectively, and a shock absorber 6 is arranged between the front ends of the left connecting tube 2 and the right connecting tube 3. Reinforcing tubes 7 are arranged at the front ends of the left connecting tube 2 and the right connecting tube 3 and the middle of the rear fork 1.

[0015] The reinforcing pipe 7 comprises two vertical pipes 7a and a horizontal pipe 7b, which are in an "H" type structure, high in structural strength and good in carrying capacity. The rear fork 1 forms a stable triangular three-dimensional structure through the reinforcing pipe 7, the left connecting pipe 2 and the right connecting pipe 3, so as to improve the stability of the motorcycle rear suspension, and the three reinforcing pipes 7 can increase the strength, and the left connecting pipe 2 and the right connecting pipe 3 can increase the rigidity, the rear fork is changed from a traditional surface structure to a body structure, and the rigidity and the strength are comprehensively improved in combination with the shock absorber 6, the torsional rigidity Kt of the enhanced rear suspension structure is MT / φ=68880.248 N•m / rad, which is greater than 18000 N•m / rad, and meets the standard, and the bending rigidity KL of the enhanced rear suspension structure is F / L=1000 N / 2.908 mm=343878.9 N / m, which is greater than 220000 N / m, and meets the standard.

[0016] The first connecting piece 4 is in an acute angle structure, one end of the first connecting piece 4 is welded with the left fork pipe 1a or the right fork pipe 1b, and the other end is welded with the left connecting pipe 2 or the right connecting pipe 3. The second connecting piece 5 is arranged at one end of the two vertical pipes 7a away from the middle of the rear fork 1, and the reinforcing pipe 7 and the left connecting pipe 2 or the right connecting pipe 3 are connected through the second connecting piece 5. The rotating shaft is arranged between the two second connecting pieces 5, and the shock absorber 6 is arranged outside the rotating shaft, which acts together with the reinforcing pipe 7, the left connecting pipe 2 and the right connecting pipe 3 to increase the rigidity, the strength and the stability of the motorcycle rear suspension.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and claims of the present application. Such changes fall within the scope of the present application.

Claims

1. A motorcycle rear suspension structure comprising a rear fork (1), characterized in that: The left connecting pipe (2) is arranged above the left pipe (1a) of the rear fork (1), and the right connecting pipe (3) is arranged above the right pipe (1b) of the rear fork (1), the left connecting pipe (2) and the right connecting pipe (3) are arranged in a forward inclination, the rear ends of the left connecting pipe (2) and the right connecting pipe (3) are connected with the rear ends of the left pipe (1a) and the right pipe (1b) respectively, and the shock absorber (6) is arranged between the front ends of the left connecting pipe (2) and the right connecting pipe (3). The reinforcing pipe (7) is arranged at the front ends of the left connecting pipe (2) and the right connecting pipe (3) and the middle part of the rear fork (1).

2. A motorcycle rear suspension structure according to claim 1, characterized in that: The reinforcing pipe (7) comprises two vertical pipes (7a) and a horizontal pipe (7b), and the two vertical pipes (7a) and the horizontal pipe (7b) are in an H-shaped structure.

3. A motorcycle rear suspension arrangement as claimed in claim 1 or 2, characterised in that: The first connecting piece (4) is arranged at the rear ends of the left pipe (1a) and the right pipe (1b) and is in an acute angle structure, one end of the first connecting piece (4) is welded with the left pipe (1a) or the right pipe (1b), and the other end is welded with the left connecting pipe (2) or the right connecting pipe (3).

4. A motorcycle rear suspension structure according to claim 2, characterized in that: The second connecting piece (5) is arranged at the ends of the two vertical pipes (7a) away from the middle part of the rear fork (1), and the reinforcing pipe (7) and the left connecting pipe (2) or the right connecting pipe (3) are connected through the second connecting piece (5).

5. A motorcycle rear suspension arrangement as claimed in claim 4, characterised in that: The rotating shaft is arranged between the two second connecting pieces (5), and the shock absorber (6) is sleeved on the rotating shaft.

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