CN116424469A - Motorcycle and body frame thereof - Google Patents

Abstract

This application relates to a motorcycle and its body frame. The body frame includes two main pipes, a bottom pipe, a connecting pipe, a rear cradle shaft and a reinforcing pipe. The outer pipe walls of the two main pipes are protrudingly provided with first connecting parts. , the two ends of the connecting pipe are respectively connected to the first connecting parts of the two main pipes, the rear cradle shaft is passed through the through hole of the connecting pipe and the part where the rear cradle passes through the connecting pipe is provided with a hole for installing the rear cradle shaft The first mounting portion enables the rear cradle to be mounted on the outer side of the vehicle body frame. The above-mentioned car body frame installs the rear rocker on the outside of the car body frame. On the one hand, the distance between the two main pipes is effectively reduced, thereby shortening the length of the reinforcing pipe and reducing the weight of the pipe fittings; on the other hand, reducing the bottom pipe and reinforcement The support span of the tube effectively reduces the stress of the bottom tube and the reinforcing tube when they are loaded, so that the wall thickness of the bottom tube and the reinforcing tube can be reduced while maintaining sufficient strength of the car body, thereby realizing the lightweight of the motorcycle.

Description

Motorcycle and its body frame

technical field

The present application relates to the technical field of motorcycles, in particular to a motorcycle and its body frame.

Background technique

Motorcycles are commonly used vehicles for people to travel. The motorcycle body frame is the main load-bearing part of the motorcycle. The body frame is used to install and connect multiple motorcycle parts such as handles, wheels, rear shock absorption structures, and support feet. , so the rigidity of the motorcycle body frame and the strength of each component of the body frame are particularly critical. Common motorcycle body frames include single-pipe, double-pipe and other structures, wherein the double-pipe motorcycle body frame includes two main pipes and bottom pipes connecting the two main pipes. The bottom tube of body frame has poor bending resistance, torsion resistance and load-carrying capacity. In order to ensure that the bottom tube has sufficient strength when loaded, the wall thickness of the bottom tube is difficult to be thinned, which makes it difficult to reduce the weight of the motorcycle.

Contents of the invention

Based on this, it is necessary to provide a motorcycle and its body frame for the problem that the motorcycle in the related art is difficult to achieve light weight. The technical solution is as follows:

In one aspect, a vehicle body frame is provided, the vehicle body frame includes two main pipes, a bottom pipe, a connecting pipe, a rear cradle shaft and a reinforcing pipe, the two main pipes are arranged at intervals, and the outer pipe of each main pipe The walls of the tubes are all protrudingly provided with first connecting parts, one ends of the two main pipes are connected to the bottom pipe, and the two ends of the connecting pipes are respectively connected to the first connecting parts of the two main pipes. The connecting pipe is provided with a through hole in the axial direction, the rear cradle shaft is passed through the through hole, and the part of the rear cradle passing through the connecting pipe is provided with a first hole for installing the rear cradle shaft. In the installation part, both ends of the reinforcing pipe are respectively connected with the two main pipes.

The technical scheme is further described below:

In one of the embodiments, the two main pipes are bent or inclined towards the ground, and the first connection part is correspondingly provided on the bent or inclined side of the main pipes.

In one of the embodiments, the reinforcing tube is protruded with two second connecting parts arranged at intervals, and the second connecting parts are arranged on the inside or outside of the connection between the reinforcing tube and the main pipe, and the bottom tube is protrudingly provided with There are two third connecting parts arranged at intervals, and the two second connecting parts cooperate with the two third connecting parts to form a second mounting part for mounting the engine.

In one of the embodiments, the reinforcing pipe is protruded with a first mounting seat, and the bottom pipe is protruded with a second mounting seat, and the first mounting seat cooperates with the second mounting seat to form a The third installation part of the seismic structure.

In one embodiment, the first mounting seat is protruded at the middle of the reinforcing tube, and the second mounting seat is protruded at the middle of the bottom tube.

In one embodiment, the distance between the two main pipes increases gradually in a direction away from the bottom pipe.

In one of the embodiments, the vehicle body frame further includes two first reinforcement plates, the first reinforcement plates are respectively connected to the two ends of the bottom tube in one-to-one correspondence, and one end of the first reinforcement plate The bottom pipe is connected in one-to-one correspondence, and the other end of the first reinforcing plate is connected in one-to-one correspondence with the first installation part.

In one of the embodiments, the vehicle body frame further includes a mounting plate and a second reinforcement plate, the mounting plate is connected to the bottom tube, the mounting plate is provided with mounting holes for mounting side brackets, and the mounting plate The side of the plate close to the bottom pipe is connected with the second reinforcing plate.

In one embodiment, the vehicle body frame further includes a mounting pipe for mounting a front fork, and the other ends of the two main pipes are connected to the mounting pipe.

In one embodiment, the vehicle body frame further includes a mounting pipe for mounting a front fork, and the other ends of the two main pipes are connected to the mounting pipe.

In another aspect, a motorcycle is provided, comprising a rear rocker, a shock absorbing structure, a side bracket, an engine, a front fork, and the vehicle body frame, the rear rocker is detachably connected to the first mounting part , the shock absorbing structure, the side bracket, the engine and the front fork are all detachably connected to the vehicle body frame.

The above-mentioned motorcycle and its body frame, the main pipe is provided with a first connecting portion, the two ends of the connecting pipe are respectively connected with the first connecting portions of the two main pipes, the connecting pipe is provided with a through hole in the axial direction, and the rear cradle shaft passes through A first mounting portion for installing the rear cradle is provided at the part where the rear cradle passes through the connecting pipe, so that the rear cradle can be installed on the outside of the vehicle body frame. Compared with the design where the rear cradle is arranged between the two main pipes, the above-mentioned car body frame installs the rear cradle outside the car body frame. On the one hand, the distance between the two main pipes is effectively reduced, thereby shortening the length of the reinforcing pipe. The weight of the pipe fittings is reduced; on the other hand, the support span of the bottom pipe and the reinforcement pipe is reduced, thereby effectively reducing the stress of the bottom pipe and the reinforcement pipe when they are loaded, so that the bottom can be thinned while maintaining sufficient strength of the car body. The wall thickness of the tube and the reinforced tube, thereby realizing the lightweight of the motorcycle.

Description of drawings

The drawings constituting a part of the application are used to provide further understanding of the application, and the schematic embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation to the application.

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a vehicle body frame according to an embodiment of the present application.

FIG. 2 is a structural schematic diagram of another angle of the vehicle body frame in FIG. 1 .

10. Body frame; 100. Supervisor; 110. First connecting part; 200. Bottom pipe; 210. Third connecting part; 220. Second mounting seat; 300. Connecting pipe; 400. Strengthening pipe; 410. Second Connecting part; 420, first mounting seat; 500, first reinforcing plate; 510, second reinforcing plate; 600, mounting plate; 610, mounting hole; 700, mounting tube; 800, rear cradle; 810, rear cradle axis.

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of this application, it should be noted that if these terms "a certain body" and "a certain part" appear, these terms may be part of the corresponding "component", that is, "a certain body", "a certain part" and the "Other parts of the component" are integrally formed; it can also be an independent component that can be separated from the "other parts of the component", that is, "a certain body" and "a certain part" can be manufactured independently, and then combined with "other parts of the component" into a whole. The expression of the above-mentioned "a certain body" and "a certain part" in this application is only one of the embodiments. For the convenience of reading, it is not to limit the scope of protection of the application. As long as the above-mentioned features are included and the functions are the same, it should be understood as The technical scheme equivalent to this application.

In the description of this application, it should be noted that if these terms "unit", "component", "mechanism" and "device" appear, the components contained in these terms can also be combined flexibly, and can be combined according to actual needs. Carry out modular production to facilitate modular assembly. The division of the above-mentioned components in this application is only one of the embodiments. For the convenience of reading, it is not intended to limit the scope of protection of this application. As long as the above-mentioned components are included and have the same function, it should be understood as an equivalent technical solution of this application.

In the description of the present application, it should be understood that if any of these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", " Front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application.

In addition, if these terms "first" and "second" appear, these terms are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, unless otherwise clearly specified and limited, if any terms such as "mounted", "connected", "connected" and "fixed" appear, these terms should be interpreted in a broad sense. For example, it can be a fixed connection, or a detachable connection, or integrated; it can be a mechanical connection, or it can be an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be the internal communication of two components Or the interaction relationship between two elements, unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise clearly specified and limited, if there is a similar description that the first feature is "on" or "under" the second feature, the meaning may be that the first and second features are in direct contact, or The first and second features are in indirect contact through an intermediary. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that, if an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions are used for purposes of illustration only and are not intended to be exclusive implementation.

The motorcycle lightweight design refers to reducing the mass of the vehicle body frame 10 as much as possible under the premise of ensuring product strength, rigidity and safety performance, thereby improving the power performance and handling of the motorcycle. As described in the background, the double-pipe motorcycle body frame 10 in the related art includes two main pipes 100 and a bottom pipe 200 connecting the two main pipes 100, wherein the distance between the two main pipes 100 and the bottom pipe 200 is often designed to be The larger rectangular structure accommodates the rear cradle 800 , resulting in a larger length of the bottom tube 200 . Since the two main pipes 100 and the connecting pipe 300 form a force-bearing structure similar to a simply supported beam, when the bottom pipe 200 is subjected to the load applied by the rear shock absorber, setting a larger support span will lead to the bending and torsion resistance of the bottom pipe 200. The performance and bearing capacity are poor, so the wall thickness of the bottom tube 200 needs to be increased to maintain the strength of the vehicle body frame 10, and the weight of the motorcycle increases accordingly, making it difficult to reduce the weight.

In order to solve the above problems, as shown in Figures 1 to 2, a vehicle body frame 10 is provided in one embodiment, the vehicle body frame 10 includes two main pipes 100, a bottom pipe 200, a connecting pipe 300, and a rear cradle shaft 810 and the reinforcing pipe 400, two main pipes 100 are arranged at intervals, and the outer pipe wall of each main pipe 100 is provided with a first connecting part 110, and one end of the two main pipes 100 is connected with the bottom pipe 200, and the two ends of the connecting pipe 300 They are respectively connected to the first connecting parts 110 of the two main pipes 100. The connecting pipe 300 is provided with a through hole in the axial direction. There is a first installation part for installing the rear cradle 800, and the two ends of the reinforcing pipe 400 are respectively connected with two main pipes 100.

Wherein, the first connecting parts 110 of the two main pipes 100 may be arranged opposite to each other, so that the overall structure of the vehicle body frame 10 is symmetrical and the stress is uniform. The shape of the main pipe 100 can be a round pipe, a square pipe, or other special-shaped pipes; the main pipe 100 can have a solid structure such as beams and shafts, or a box-shaped hollow structure; the main pipe 100 can be an integral structure, or it can be a sheet The structure formed by the tailor welding of the metal parts only needs to meet the requirement that the main pipe 100 , the bottom pipe 200 , the connecting pipe 300 and the reinforcing pipe 400 form a complete vehicle body frame 10 .

Wherein, the connecting pipe 300 and the rear cradle 800 may be rotationally connected, and the first mounting part may be equipped with a bearing supporting the rear cradle shaft 810 . In this way, on the one hand, the movement function of the rear suspension can be realized; on the other hand, the rear cradle 800 can transmit the force in all directions exerted by the rear wheel on the ground to the main pipe 100 through the first connecting part 110, thereby effectively reducing the load of the connecting pipe 300. strength requirements.

The above-mentioned vehicle body frame 10, the main pipe 100 is provided with a first connecting portion 110, and the two ends of the connecting pipe 300 are respectively connected with the first connecting portions 110 of the two main pipes 100, and the connecting pipe 300 is provided with a through hole in the axial direction. The frame shaft 810 is passed through the through hole and the part where the rear cradle 800 passes through the connecting pipe 300 is provided with a first connecting portion 110 for installing the rear cradle 800, so that the rear cradle 800 can be installed on the outside of the vehicle body frame 10 . Compared with the design in the related art where the rear cradle 800 is arranged between the two main pipes 100, the above-mentioned car body frame 10 installs the rear cradle 800 on the outside of the car body frame 10. On the one hand, the distance between the two main pipes 100 is effectively reduced. , thereby shortening the length of the reinforcing tube 400 and reducing the weight of the pipe fittings; on the other hand, the support span of the bottom tube 200 and the reinforcing tube 400 is reduced, thereby effectively reducing the stress of the bottom tube 200 and the reinforcing tube 400 when they are loaded, thereby The wall thickness of the bottom pipe 200 and the reinforcement pipe 400 can be reduced while maintaining sufficient strength of the vehicle body, thereby realizing the lightweight of the motorcycle.

In one embodiment, as shown in FIG. 1 to FIG. 2 , the reinforcing tube 400 is protruded with two second connecting parts 410 arranged at intervals, and the second connecting parts 410 are arranged on the inner side of the connection between the reinforcing tube 400 and the main pipe 100 Or on the outside, the bottom pipe 200 protrudes from the bottom pipe 200 with two third connecting parts 210 arranged at intervals, and the second connecting parts 410 of the two main pipes 100 cooperate with the two third connecting parts 210 to form a second mounting part for mounting the engine. In this way, on the one hand, the function of carrying the engine is realized; on the other hand, the engine body forms a reliable support for the reinforcing pipe 400 and the main pipe 100 .

In one embodiment, as shown in FIG. 1 , the two main pipes 100 are curved or inclined toward the ground, and the first connecting portion 110 is correspondingly disposed on one side of the main pipes 100 that is bent or inclined. In this way, the overall shape of the vehicle body frame 10 formed by the bent main pipe 100 can be more suitable for the distribution of the overall components of the motorcycle.

In one embodiment, as shown in FIGS. 1 to 2 , the reinforcing tube 400 is protruded with a first mounting seat 420 , the bottom tube 200 is protrudingly provided with a second mounting seat 220 , and the first mounting seat 420 and the second mounting seat 220 Cooperate to form a third installation part for installing the shock-absorbing structure.

Further, on the basis of the above-mentioned embodiments, as shown in Figures 1 to 2, the first installation seat 420 is arranged in the middle of the reinforcing tube 400, and the second installation seat 220 can be arranged in the middle of the bottom pipe 200, and at this time the The load exerted by the seismic structure on the first mounting seat 420 and the second mounting seat 220 will be transferred to the reinforcing tube 400 and the bottom tube 200, while the main pipe 100 and the engine mounting structure form a good support for the bottom tube 200 and the reinforcing tube 400, thereby The force bearing structure of the reinforcing tube 400 and the bottom tube 200 can be improved as a whole, and the wall thickness requirements of the reinforcing tube 400 and the bottom tube 200 are reduced, thereby reducing the mass of the vehicle body frame 10 .

Wherein, the shock absorbing structure includes a rear shock absorber and a rear shock absorber transmission mechanism, the rear shock absorber is connected with the rear shock absorber transmission mechanism, the rear shock absorber is connected with the second mounting part, and the rear shock absorber transmission mechanism is connected with the first installation part. The seat 420 is connected to the second mounting seat 220 . Furthermore, the transmission mechanism of the rear shock absorber mainly includes structures such as a rear rocker arm or a rear shock absorber, as long as it can cooperate with the transmission of the rear shock absorber to form a shock absorption structure.

In one embodiment, as shown in FIGS. 1 to 2 , the distance between the two main pipes 100 increases gradually in the direction away from the bottom pipe 200 . By setting the distance between the two main pipes 100 to gradually increase in the direction away from the bottom pipe 200, it is possible to arrange the rear cradle 800 outside the vehicle body frame 10 while maximizing the distance between the engine and other motorcycle parts in the main pipe. The installation space between the 100 intervals makes the structure of the vehicle body frame 10 more reasonable and improves the rigidity of the vehicle body frame 10 .

Wherein, the two ends of the bottom pipe 200 can extend to the side of the two main pipes 100 away from the other main pipe 100, and the length of the bottom pipe 200 can be extended or reduced according to the actual needs of connecting with other motorcycle parts; The diameter of the pipe 200 can be designed to be larger than the outer diameter of the connecting pipe 300. Under the premise of the same cross-sectional area, the pipe fittings with large diameter and small wall thickness have better bending and torsion resistance, which is conducive to improving strength and rigidity. At the same time, the outer wall of the pipe fitting has There is more space for arranging components such as the third connecting portion 210 and the second mounting seat 220 , thereby improving the degree of freedom in the design of the vehicle body frame 10 .

In one embodiment, as shown in FIG. 1 to FIG. 2 , the vehicle body frame 10 further includes two first reinforcing plates 500 , and the two first reinforcing plates 500 are respectively connected to the two ends of the bottom tube 200 one by one, One end of the first reinforcing plate 500 is connected to one end of the bottom pipe 200 in a one-to-one correspondence, and the other end of the first reinforcing plate 500 is connected to the first installation part 500 in a one-to-one correspondence. When the motorcycle is turning, the rear wheels will continue to exert force in the left and right direction on the rear cradle 800. In order to prevent the rear cradle 800 from swinging too much, the connecting pipe 300 needs to have sufficient rigidity to support the rear cradle 800 to ensure the stability of the vehicle. In view of the above-mentioned problems, this embodiment sets a reinforcing plate between the bottom pipe 200 and the connecting pipe 300. On the one hand, the bottom pipe 200, the connecting pipe 300, the main pipe 100 and the reinforcing plate form a "mesh"-shaped frame structure, which improves the frame structure of the vehicle body. 10 The support rigidity of the connecting pipe 300; on the other hand, a part of the force exerted by the rear cradle 800 on the connecting pipe 300 can be transmitted to the reinforcement plate, thereby improving the force bearing of the first connecting part 110 originally supporting the connecting pipe 300 , which can effectively reduce the requirement of the first connecting portion 110 on the thickness of the material, and further reduce the overall weight of the motorcycle. Wherein, the material of the reinforcing plate can be set to aluminum alloy, and the reinforcing plate formed of the aluminum alloy has a certain strength and has a relatively small mass, so using the aluminum alloy to make the reinforcing plate can further reduce the mass of the vehicle body frame 10 .

Further, on the basis of the above embodiments, as shown in FIGS. 1 to 2 , the vehicle body frame 10 further includes a mounting plate 600 and a second reinforcing plate 510, the mounting plate 600 is connected to one end of the bottom pipe 200, and the mounting plate 600 A mounting plate 610 for mounting side brackets is provided, and a side of the mounting plate 600 close to the bottom tube 200 is connected with a second reinforcing plate. Specifically, the mounting plate 600 is welded to the end of the bottom pipe 200 through circumferential welding, and the second reinforcing plate 510 is welded to the outer wall of the bottom pipe 200 through fillet welding. The right-angle connection structure can provide good support for the mounting plate 600, which helps to improve the force of the mounting plate 600 when the side bracket is parked, and effectively reduces the requirements for the material thickness of the mounting plate 600. The overall weight of the motorcycle is reduced by reducing the thickness of the mounting plate 600.

In one embodiment, as shown in FIGS. 1 to 2 , the vehicle body frame 10 further includes a mounting pipe 700 for mounting a front fork, and the other ends of the two main pipes 100 are connected to the mounting pipe 700 . In this way, the two main pipes 100 and the connecting pipe 300 form a closed structure, and a storage space for installing other motorcycle components is formed between the two main pipes 100 and the bottom pipe 200 .

It should be noted that there are many ways to connect the components of the vehicle body frame 10 in any of the above-mentioned embodiments, such as buckle connection, connection by bolts, connection by rivets, bonding or welding, etc. It is only necessary to securely install the components.

In one embodiment, as shown in Figures 1 to 2, a motorcycle is provided, including a rear rocker 800, a shock absorbing structure, a side bracket, an engine, a front fork, and a vehicle body frame 10, and the rear rocker 800 and the The first mounting part 500 of the mounting part of the rear cradle 800 is detachably connected, and the shock absorbing structure, side brackets, engine and front fork are all detachably connected with the vehicle body frame 10 .

The motorcycle in the above embodiment effectively reduces the distance between the two main pipes 100 and the bottom pipe 200 by installing the rear rocker 800 on the outside of the vehicle body frame 10. On the one hand, the length of the reinforcing pipe 400 is shortened, and the weight of the pipe fittings is reduced; On the one hand, the support span of the bottom tube 200 and the reinforcement tube 400 is reduced, thereby effectively reducing the stress of the bottom tube 200 and the reinforcement tube 400 when they are loaded, so that the bottom tube 200 and the bottom tube 200 can be thinned while maintaining sufficient strength of the vehicle body. The wall thickness of the pipe 400 is reinforced, thereby realizing the lightweight of the motorcycle.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above examples only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (10)

1. A vehicle body frame, characterized in that, the vehicle body frame comprises: Two main pipes, the two main pipes are arranged at intervals _{, and} the outer pipe wall of each of the main pipes is protrudingly provided with a first connecting part; Bottom pipes, one ends of the two main pipes are connected to the bottom pipes; A connecting pipe and a rear cradle shaft, the two ends of the connecting pipe are respectively connected to the first connecting parts of the two main pipes, the connecting pipe is provided with a through hole in the axial direction, and the rear cradle shaft passes through A first installation portion for installing a rear cradle is provided at the portion where the rear cradle shaft passes through the connecting pipe in the through hole; and Reinforcement pipe, the two ends of the reinforcement pipe are respectively connected with the two main pipes. 2 . The vehicle body frame according to claim 1 , wherein the two main pipes are bent or inclined toward the ground, and the first connecting portion is correspondingly provided on the bent or inclined side of the main pipes. 3 . 3. The vehicle body frame according to claim 1, characterized in that, the reinforcement tube is protrudingly provided with two second connecting parts arranged at intervals, and the second connecting part is arranged at the junction of the reinforcement tube and the main pipe. On the inner side or the outer side, the bottom pipe is protruded with two third connecting parts arranged at intervals, and the two second connecting parts cooperate with the two third connecting parts to form a second installing part for installing the engine. 4. The vehicle body frame according to claim 1, characterized in that, the reinforcing pipe is protruded with a first mounting seat, and the bottom pipe is protruded with a second mounting seat, and the first mounting seat and the The second mounting seat cooperates to form a third mounting portion for mounting the shock absorbing structure. 5 . The vehicle body frame according to claim 4 , wherein the first mounting seat protrudes from the middle of the reinforcing pipe, and the second mounting seat protrudes from the middle of the bottom pipe. 5 . 6 . The vehicle body frame according to claim 1 , wherein the distance between the two main pipes increases gradually in a direction away from the bottom pipe. 7. The vehicle body frame according to claim 1, characterized in that, the vehicle body frame further comprises two first reinforcement plates, and the first reinforcement plates correspond to the two ends of the bottom tube respectively One end of the first reinforcement plate is connected to the bottom pipe in a one-to-one correspondence, and the other end of the first reinforcement plate is connected to the first installation part in a one-to-one correspondence. 8. The vehicle body frame according to claim 1, characterized in that, the vehicle body frame further comprises a mounting plate and a second reinforcement plate, the mounting plate is connected to the bottom tube, and the mounting plate is provided with a The mounting hole of the side bracket is installed, and the side of the mounting plate close to the bottom pipe is connected with the second reinforcing plate. 9 . The vehicle body frame according to claim 1 , further comprising a mounting pipe for mounting a front fork, and the other ends of the two main pipes are connected to the mounting pipe. 10 . 10. A motorcycle, characterized in that it comprises a rear rocker, a shock absorbing structure, a side support, an engine, a front fork, and the vehicle body frame as claimed in any one of claims 1 to 9, the rear rocker and The first mounting part is detachably connected, and the shock absorbing structure, the side bracket, the engine and the front fork are all detachably connected to the vehicle body frame.

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