CN201380934Y - Structure of motorcycle - Google Patents

Abstract

A motorcycle structure comprises a first belt transmission mechanism, a gear transmission mechanism, a second belt transmission mechanism and a rear shock absorber. A crankshaft of an engine of the motorcycle drives a rear wheel to rotate through the first belt transmission mechanism, the gear transmission mechanism and the second belt transmission mechanism in sequence, and the second belt transmission mechanism is a dry belt transmission mechanism, so that the rear wheel transmission structure is facilitated to be simplified. The rear shock absorber is assembled and combined on a rear tube body and a rear rocker arm of a main frame in a manner that an inclination angle is approximately horizontal, and the rear shock absorber is positioned on the outer side surfaces of a storage box and a rear wheel of the motorcycle, so that the front and rear lengths of the motorcycle are favorably shortened, the longitudinal depth of the storage box is increased, and the assembly space utilization rate is increased.

Description

Motorcycle Construction

【Technical field】

The utility model relates to a structure of a motorcycle, in particular to a structure of a motorcycle which can simplify the assembly structure and improve the utilization rate of the assembly space.

【Background technique】

Nowadays, motorcycles have become an indispensable and convenient means of transportation in daily life. At present, most motorcycles are powered by engines or electric motors. If the motorcycle is equipped with an engine, the engine is powered by burning gasoline to push the cylinder piston, and the electric power of the battery is used as the auxiliary power when starting the ignition. Furthermore, the engine must be matched with a suitable transmission structure so that the power generated by the cylinder piston and the crankshaft inside the engine can be smoothly transmitted to the rear wheels, causing the rear wheels to rotate and the motorcycle to move forward. Furthermore, the engine of the motorcycle and the rear arm of the rear wheel also need to be equipped with an appropriate suspension structure to provide a shock-absorbing effect. Therefore, how to design an appropriate transmission and suspension structure is also one of the indispensable important technologies for manufacturing motorcycles.

For the existing scooter type motorcycle, it is an integral swing engine that combines the engine and the transmission that supports the rear wheel at the rear end, and the engine can be freely assembled on the car body frame by swinging up and down. On the other hand, the sports motorcycle fixes the engine on the body frame, and assembles the rear arm on the body frame so that it can move up and down, and transmits the driving force of the engine to the rear wheel through the exposed chain.

However, in this scooter type motorcycle, the integral swing type engine can be applied to the vehicle body by swinging up and down due to the weight of the engine and the transmission. The weight is heavier, causing the spring to press down and the weight is increased and it is not suitable. Furthermore, in sports motorcycles, since the exposed chain is used to transmit power, not only the noise is high, the precision is reduced, the service life is also short, and the frequency of maintenance is also increased.

In order to overcome the above-mentioned problems, the Chinese Taiwan Publication No. 431976 New Patent discloses a driving device of a motorcycle, which utilizes an engine fixed on a body frame to support a pivot at the front end of a rear arm, and utilizes the rear The rear end of the arm supports a rear wheel, a dry V-belt transmission is arranged in a crankcase of the engine, and a wet speed reducer of a secondary transmission is fitted inside the rear arm. Since the engine is fixed on the vehicle body side and the dry V-belt transmission is arranged in the crankcase of the engine, the weight on the side of the rear arm can be reduced, and the weight of the suspension spring can be reduced. Furthermore, because the secondary transmission device is installed inside the rear arm, there is no need to transmit power through an exposed chain, so the precision can be improved and the service life can be extended.

Furthermore, the new patent No. I254686 of Taiwan, China discloses a rear shock absorber installation structure of a low-floor vehicle, which is used in a scooter motorcycle similar to the No. 431976 new patent of the announcement. An engine is mounted under a low floor, and a rear shock absorber for a rear wheel is arranged at a slightly central position of a car body. There is a storage box under the seat cushion, and its front and rear lengths are roughly the same as the front and rear lengths of the seat cushion. Below the storage box, the rear shock absorber for the rear wheel is laterally arranged along the rear portion of an upper frame extending rearward and downward from a head pipe. Thereby, the storage space of the storage box provided under the seat cushion is enlarged.

However, the transmission and suspension structures disclosed in the No. 431976 and No. I254686 patents still have the following problems in actual use, for example: although the wet speed reducer of the secondary transmission device is assembled in the inside of the rear arm, Gears and chains are still used for transmission, and the inside of the rear arm must contain a sufficient amount of lubricating oil, so the overall weight of the rear arm will be increased, and the chain still produces considerable noise. Since the rear arm must be designed as a complex closed structure and oil return structure to avoid leakage of lubricating oil, it is not conducive to reducing the manufacturing and maintenance costs of the rear arm, and there will be risks and troubles of oil leakage polluting the environment. Furthermore, if the rear shock absorber for the rear wheel is arranged at the approximate center position of the vehicle body and directly below the storage box, although the storage space can be enlarged by increasing the front and rear length of the storage box, it cannot To avoid limiting the longitudinal depth of the storage box and increasing the overall front and rear length of the motorcycle, it is unfavorable to be applied to small and medium-sized scooter motorcycles. In addition, since the rear shock absorber for rear wheels is arranged directly under the glove box, it is necessary to provide an inspection cover on the bottom surface of the glove box for maintenance and inspection of the rear shock absorber for rear wheels. However, it is difficult for maintenance personnel to perform maintenance and replacement of the rear shock absorber for the rear wheel from the upward viewing angle of the inspection cover of the glove box. Manufacturing costs and selling prices are not conducive to improving product competitiveness.

Therefore, it is necessary to provide a motorcycle structure to solve the problems in the prior art.

【Content of utility model】

The main purpose of this utility model is to provide a motorcycle structure, wherein the crank shaft of the engine drives the rear wheel to rotate through the first belt transmission mechanism, the gear transmission mechanism and the second belt transmission mechanism in sequence, and the second belt transmission mechanism It is a dry belt transmission mechanism, which is beneficial to simplify the rear wheel transmission structure, reduce the weight of the rear rocker arm, reduce the noise of the rear wheel transmission, and reduce the manufacturing and maintenance costs of the transmission structure.

The secondary purpose of this utility model is to provide a motorcycle structure, which is to assemble the rear shock absorber between the rear tube body of the main frame and the rear rocker arm of the rear wheel with a slight inclination angle, and The storage box located on the car body and the outer side of the rear wheel will not conflict with the space of the storage box, which is conducive to reducing the front and rear length of the motorcycle, increasing the longitudinal depth of the storage box, expanding the size of the shock absorber, and improving the convenience of shock absorber maintenance performance, increase the utilization rate of assembly space, enhance the decorative appearance, and provide stronger shock absorbing force and better riding comfort.

Another object of the present utility model is to provide a motorcycle structure, which selects the front end of the second belt transmission mechanism to be located on the outside of the rear rocker, and its rear end is located on the inside of the rear rocker, which is beneficial to Improve the convenience of belt maintenance and increase the pivotal stability of the rear rocker arm.

In order to achieve the above-mentioned purpose, the utility model provides a structure of a motorcycle, which includes a main frame, an engine, a rear rocker, a rear shock absorber and a rear wheel, the main frame is used to fix the engine, the rear rocker arm is connected to the engine and the rear wheel, and it is characterized in that: the engine includes: a first belt transmission mechanism, which is driven by a crankshaft of the engine to rotate; and a gear transmission mechanism, which is driven by the The drive of the first belt transmission mechanism rotates, and has a pivot; moreover, the rear rocker is provided with: a second belt transmission mechanism, which is driven by the pivot of the gear transmission mechanism and rotates, and the The second belt transmission mechanism is a dry belt transmission mechanism, which is used to drive the rear wheel to rotate; on the rear rocker arm, and the rear shock absorber is located on a glove box of the motorcycle and the outer side of the rear wheel.

In the structure of the motorcycle of the present invention, the first belt transmission mechanism is selected from a V-belt transmission mechanism or a timing belt transmission mechanism.

In the structure of the motorcycle of the present invention, the gear transmission mechanism is a reduction gear set.

In the structure of the motorcycle of the present invention, the second belt transmission mechanism is selected from a V-belt transmission mechanism or a timing belt transmission mechanism.

In the structure of the motorcycle of the present invention, the second belt transmission mechanism has a belt, which is a toothed belt.

In the structure of the motorcycle of the present invention, the second belt transmission mechanism has a belt, which is a rubber belt or a metal belt.

In the structure of the motorcycle of the present invention, the first belt transmission mechanism is arranged inside the engine on one side of the motorcycle, and the second belt transmission mechanism is arranged behind the engine on the other side of the motorcycle.

In the structure of the motorcycle of the present invention, the second belt transmission mechanism is located at the inner side of the rear swing arm.

In the structure of the motorcycle of the present invention, the front end of the second belt transmission mechanism is located at the outer side of the rear swing arm, and its rear end is located at the inner side of the rear swing arm.

In the structure of the motorcycle of the present invention, a first bracket protrudes from the rear tubular body of the main frame to pivotally connect the rear shock absorber.

In the structure of the motorcycle of the present invention, a second bracket protrudes from the rear rocker arm to pivotally connect the rear shock absorber.

In the structure of the motorcycle of the present invention, the position of the pivot point between the second bracket and the rear shock absorber is projected in the tire range of the rear wheel in side view.

In the structure of the motorcycle of the present invention, the rear shock absorber is assembled between the rear tube body and the rear rocker arm at a slightly horizontal inclination angle.

【Description of drawings】

Fig. 1: An assembled side view of the structure of the motorcycle of the first embodiment of the present invention.

Fig. 2: Transverse sectional view of the transmission structure of the motorcycle according to the first embodiment of the utility model.

Fig. 3: A side view of the motorcycle suspension structure of the first embodiment of the present invention.

Fig. 4: An assembled side view of the structure of the motorcycle according to the second embodiment of the present invention.

1 main frame 10 head tube body

11 front tube body 12 rear tube body

121 First bracket 13 Lower tube body

14 Seat Cushion 15 Storage Box

2 engine 21 crankcase

211 crankshaft 22 cylinder head

221 pistons 3 rear rocker arms

31 Rear axle 32 Second bracket

4 Rear wheel 5 The first belt transmission mechanism

51 drive pulley block 52 belt

53 passive pulley block 6 gear transmission mechanism

61 drive shaft 611 drive gear

62 reduction gear 63 pivot

631 passive gear 7 second belt transmission mechanism

71 drive gear 72 belt

73 passive gears 8 rear shock absorbers

A inclination

【Detailed ways】

In order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, preferred embodiments of the present invention will be exemplified below in detail along with the attached drawings.

Please refer to Fig. 1 and shown in Fig. 2, the structure of the motorcycle of the first embodiment of the present utility model generally comprises a main frame 1, an engine 2, a rear rocker arm 3 and a rear wheel 4, a first belt drive Mechanism 5, a gear transmission mechanism 6, a second belt transmission mechanism 7 and a rear shock absorber 8, the utility model will omit other conventional structures of this motorcycle simultaneously, will not give detailed description one by one. Furthermore, the orientation terms of the present invention, such as front, rear, left, right, up, and down, mentioned below are based on the front and rear directions of the motorcycle, and other orientation terms are also based on general motorcycles. The left, right, up, and down of the usage state are used as references. The above-mentioned orientation terms are only used to assist in explaining the assembly relationship of related components, and are not used to limit the utility model.

Please refer to FIG. 1 , the main frame 1 of the first embodiment of the present invention is an existing structure of a motorcycle, and it is used to support various parts of the motorcycle. In the present utility model, the main frame 1 generally includes: a head tube body 10, which is used to pivotally connect the front wheel mechanism (not shown); a pair of front tube bodies 11, which are downward and extended to the rear; a pair of rear pipe body 12, formed by extending slightly horizontally backward from the front pipe body 11; and a pair of lower pipe bodies 13, located below the front pipe body 11, and formed by The head pipe body 10 is formed by extending downward and rearward. The rear pipe body 12 is located under the seat cushion 14 and surrounds a glove box 15 . Furthermore, the engine 2 is fixed between the front tubular body 11 , the rear tubular body 12 and the lower tubular body 13 of the main frame 1 by appropriate means (such as screwing or welding). The exterior of the engine 2 generally includes: a crankcase 21, located between the rear pipe body 12 and the lower pipe body 13, and has a crankshaft 211 inside; and a cylinder head 22, located between the front pipe body 11 and the lower pipe body. There are several pistons 221 inside the tube body 13 . The cylinder head 22 faces forward of the front of the vehicle and is only slightly inclined upward relative to the level of the motorcycle, so as to reduce the assembly height occupied by the engine 2 . In addition, the rear rocker arm 3 is located between the engine 2 and the rear wheel 4 , and the rear end of the rear rocker arm 3 has a rear axle 31 to support the rear wheel 4 .

Please refer to FIG. 1 and FIG. 2 , the first belt transmission mechanism 5 of the first embodiment of the present invention is located in the front half of the crankcase 21 of the engine 2 . In the present utility model, the first belt transmission mechanism 5 can be selected from a V-shaped belt transmission mechanism or a timing belt transmission mechanism, preferably selected from a CVT (continuous variable transmission) stepless automatic transmission system or an ECVT (electronic continuous variable transmission) ) The belt transmission mechanism of the electronic stepless automatic transmission system. In this embodiment, the first belt transmission mechanism 5 is a V-shaped belt transmission mechanism, which generally includes: a drive pulley set 51 located at the front end of the first belt transmission mechanism 5 and driven by the crankshaft 211 of the engine 2 Drive and rotate; a belt 52, which can be selected from rubber belt or metal belt, and can be in the form of a toothed belt, and its front end is wound around the drive pulley block 51, and is driven by the drive pulley block 51 to rotate; and A passive pulley set 53 is located at the rear end of the first belt transmission mechanism 5 , and the rear end of the belt 52 is wound on the passive pulley set 53 to drive the passive pulley set 53 to drive the rear gear transmission mechanism 6 .

Please refer to FIGS. 1 , 2 and 3 , the gear transmission mechanism 6 of the first embodiment of the present invention is also located in the rear half of the crankcase 21 of the engine 2 . This gear transmission mechanism 6 is the existing structure of motorcycle, and it is preferably selected from the reduction gear set, and generally includes: a drive shaft 61, positioned at the front end of this gear transmission mechanism 6, and behind the first belt transmission mechanism 5 The driven pulley block 53 at the end is combined, and is driven by the driven pulley block 53 to rotate, and a drive gear 611 is provided on the drive shaft 61; at least one reduction gear 62, which is meshed with the drive gear 611 of the drive shaft 61; And a pivot 63, located at the rear end of the gear transmission mechanism 6, has a driven gear 631 on the pivot 63, the driven gear 631 is combined with the reduction gear 62, and driven by the driven gear 631 to rotate.

Please refer to FIGS. 1 , 2 and 3 again. The second belt transmission mechanism 7 of the first embodiment of the present invention is located near the rear rocker arm 3 , for example, inside the rear rocker arm 3 . In this embodiment, the first belt transmission mechanism 5 is arranged inside the engine 2 on one side (for example, the right side) of the motorcycle, and the second belt transmission mechanism 7 is arranged on the other side (for example, the left side) of the motorcycle. ) behind the engine 2, the first belt drive mechanism 5 drives the second belt drive mechanism 7 via the gear drive mechanism 6. In the present invention, the second belt transmission mechanism 7 can be selected from a dry V-belt transmission mechanism or a dry timing belt transmission mechanism. In this embodiment, the second belt transmission mechanism 7 is a dry timing belt transmission mechanism, which generally includes: a driving gear 71, located at the front end of the second belt transmission mechanism 7, and combined with the gear transmission mechanism 6 On the pivot 63, be driven by this pivot 63 and rotate; A belt 72, it can be selected from rubber belt or metal belt, and can be the type of toothed belt, and its front end is wound around this driving gear 71, And be driven by this drive gear 71 and rotate; And a driven gear 73, is positioned at the rear end of this second belt transmission mechanism 7, and is rotatably combined on this rear wheel shaft 31, and the rear end of this belt 72 is wound on The driven gear 73 is used to drive the driven gear 73 to drive the rear wheel 4 to rotate. In the present utility model, the crank shaft 211 of the engine 2 drives the rear wheel 4 to rotate through the first belt transmission mechanism 5, the gear transmission mechanism 6 and the second belt transmission mechanism 7 in sequence, and the second belt transmission mechanism 7 is a dry belt transmission mechanism, which is conducive to simplifying the transmission structure of the rear wheel 4, reducing the load of the rear rocker arm 3, reducing the transmission noise of the rear wheel 4, and reducing the manufacturing and maintenance costs of the transmission structure.

Please refer to Fig. 1, 2 and shown in Fig. 3 again, the rear shock absorber 8 of the first embodiment of the present invention is the existing structure of the motorcycle, but the present utility model is to describe the rear shock absorber 8 in the following way Assembled in a better relative position. In the present utility model, the front end of the rear shock absorber 8 is combined on the rear pipe body 12 of the main frame 1, and the rear end thereof is combined on the rear rocker arm 3, and the rear shock absorber 8 is It is located on the outer side (for example, left side) of the glove box 15 and the rear wheel 4 of the motorcycle. More specifically, a first bracket 121 protrudes from the rear tube body 12 of the main frame 1 to pivotally connect the rear shock absorber 8; at the same time, a second bracket 32 protrudes from the rear rocker arm 3, To pivotally connect the rear shock absorber 8 . As shown in the side view of FIG. 3 , the pivot joint position (not shown) between the second bracket 32 and the rear shock absorber 8 is preferably projected in the tire range of the rear wheel 4 in a side view. The rear shock absorber 8 is preferably assembled between the rear tube body 12 and the rear rocker arm 3 with a slight inclination A which is slightly horizontal, and the inclination A will be elastically compressed or restored by the rear shock absorber 8 However, the included angle of the inclination angle A relative to the horizontal line is between 1 degree and 30 degrees, preferably between 1 degree and 15 degrees, especially between 1 degree and 10 degrees. Since the rear shock absorber 8 is assembled in a slightly horizontal manner and is located on the outer side of the storage box 15 and the rear wheel 4 of the vehicle body, it will not conflict with the space of the storage box 15, which is conducive to reducing the size of the front and rear of the motorcycle. length, increase the longitudinal depth of the storage box 15, expand the size of the shock absorber, improve the convenience of shock absorber maintenance, increase the utilization rate of assembly space, and improve the appearance decoration. Especially, when the length of the front and rear extension of the rear shock absorber 8 increases, the utility model will be able to provide stronger buffering and shock absorbing force, so as to provide better riding comfort.

Please refer to Fig. 4, the structure of the motorcycle of the second embodiment of the utility model is similar to the first embodiment of the utility model, and continues to use the same figure number, but the difference between the two is: the second embodiment It is an option to change the shape of the rear rocker arm 3 , and the front end of the second belt transmission mechanism 7 is designed to be positioned outside the rear rocker arm 3 , and its rear end is designed to be positioned inside the rear rocker arm 3 . Based on the above design, when the belt of the second belt transmission mechanism 7 becomes loose or needs to be repaired and replaced, it will help to improve the maintenance convenience of the second belt transmission mechanism 7 . Furthermore, the above-mentioned design can also relatively reduce the span width where the front end of the rear rocker arm 3 is pivotally connected to the pivot shaft 63 , thus increasing the pivotal stability of the rear rocker arm 3 .

As mentioned above, compared with the existing transmission structure, the wet reducer is assembled inside the rear arm, and gears and chains are used for transmission, thus generating noise and disadvantageously reducing manufacturing and maintenance costs, and the existing suspension structure will The rear shock absorber for the rear wheel is arranged at the approximate center of the car body and directly under the storage box, which will increase the overall front and rear length of the motorcycle and make it difficult to repair and replace the rear shock absorber for the rear wheel, as shown in Figure 1 to The crankshaft 211 of the engine 2 of the present utility model shown in Fig. 4 passes through the first belt transmission mechanism 5, the gear transmission mechanism 6 and the second belt transmission mechanism 7 in order to drive the rear wheel 4 to rotate, and the second belt transmission mechanism Mechanism 7 is a dry belt transmission mechanism, thus it is beneficial to simplify the transmission structure of the rear wheel 4, reduce the load of the rear rocker arm 3, reduce the transmission noise of the rear wheel 4, and reduce the manufacturing and maintenance costs of the transmission structure. Furthermore, since the rear shock absorber 8 is assembled in a slightly horizontal manner and is located on the outer side of the storage box 15 and the rear wheel 4 of the vehicle body, it will not conflict with the space of the storage box 15, which is conducive to reducing the size of the storage box 15. The front and rear lengths of the motorcycle increase the longitudinal depth of the storage box 15, the size of the shock absorber is enlarged, the maintenance convenience of the shock absorber is improved, the utilization rate of the assembly space is increased, and the appearance decoration is improved. Especially, when the length of the front and rear extension of the rear shock absorber 8 increases, the utility model will be able to provide stronger buffering and shock absorbing force, so as to provide better riding comfort.

Although the utility model has been disclosed with preferred embodiments, it is not intended to limit the utility model, and any person familiar with the art can make various modifications and changes without departing from the spirit and scope of the utility model. Modifications, so the scope of protection of the present utility model should be defined by the scope of the patent application.

Claims (13)

1. A structure of a motorcycle, comprising: a main frame, an engine, a rear rocker, a rear shock absorber and a rear wheel, the main frame is used to fix the engine, and the rear rocker is connected to the Engine and rear wheel, characterized in that: The engine contains: a first belt drive rotated by a crankshaft of the engine; and A gear transmission mechanism, which is driven by the first belt transmission mechanism to rotate, and has a pivot; Next to this swingarm there is: a second belt drive mechanism, which is driven to rotate by the pivot of the gear drive mechanism, and the second belt drive mechanism is a dry belt drive mechanism for driving the rear wheel to rotate; and The rear shock absorber, its front end is combined on a rear pipe body of the main frame, and its rear end is combined on the rear rocker arm, and the rear shock absorber is located in a storage box and rear of the motorcycle the outer side of the wheel. 2. The motorcycle structure according to claim 1, wherein the first belt transmission mechanism is selected from a V-belt transmission mechanism or a timing belt transmission mechanism. 3. The structure of motorcycle according to claim 1, characterized in that: the gear transmission mechanism is a reduction gear set. 4. The motorcycle structure according to claim 1, wherein the second belt transmission mechanism is selected from a V-belt transmission mechanism or a timing belt transmission mechanism. 5. The motorcycle structure according to claim 1 or 4, characterized in that: the belt in the second belt transmission mechanism is a toothed belt. 6. The motorcycle structure according to claim 1 or 4, characterized in that: the belt in the second belt transmission mechanism is a rubber belt or a metal belt. 7. The structure of the motorcycle according to claim 1, wherein the first belt transmission mechanism is arranged inside the engine on one side of the motorcycle, and the second belt transmission mechanism is arranged on the other side of the motorcycle. Behind the engine on one side. 8. The motorcycle structure according to claim 1, wherein the second belt drive mechanism is located on the inner side of the rear rocker arm. 9. The structure of the motorcycle according to claim 1, wherein the front end of the second belt transmission mechanism is located at the outer side of the rear rocker arm, and the rear end thereof is located at the inner side of the rear rocker arm. 10 . The motorcycle structure according to claim 1 , wherein a first bracket protrudes from the rear tubular body of the main frame to pivotally connect the rear shock absorber. 11 . 11. The motorcycle structure according to claim 1 or 10, wherein a second bracket protrudes from the rear rocker arm to pivotally connect the rear shock absorber. 12 . The structure of the motorcycle according to claim 11 , wherein the position of the pivot point between the second bracket and the rear shock absorber is projected in a side view within the tire range of the rear wheel. 13 . 13. The motorcycle structure according to claim 1, wherein the rear shock absorber is assembled between the rear tube body and the rear rocker at a slightly horizontal inclination angle.

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