Tubular motorcycle frame

Abstract

The utility model relates to the technical field of motorcycles, and particularly discloses a tubular motorcycle frame which comprises a frame body and a bracket assembly detachably connected to the lower portion of the frame body, the bracket assembly comprises a left supporting pipe, a right supporting pipe, a front cross beam and a rear cross beam, and the left supporting pipe and the right supporting pipe are located on the two sides of the center line of the frame body. The ends, close to the headstock, of the left supporting pipe and the right supporting pipe are fixedly connected with the front beam, the ends, away from the headstock, of the left supporting pipe and the right supporting pipe are fixedly connected with the rear beam, and the two ends of the front beam and the two ends of the rear beam are detachably connected with the frame body through bolts. According to the scheme, the problems that in the prior art, the connecting stability of the bracket assembly and the frame body is insufficient, and vibration suppression is poor are solved, and therefore the overall performance and user experience of the motorcycle are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycles, in particular to a tubular motorcycle frame. Background Art

[0002] In traditional motorcycle frame design, the bracket assembly is used to carry weight, such as supporting motors, batteries or engines. The bracket assembly is usually fixed to the frame body by welding. Although this fixing method is structurally stable, it greatly inconveniences the disassembly and assembly of key components such as motors, engines or batteries, and limits the flexibility of vehicle maintenance and upgrades.

[0003] To solve the above problems, China Utility Model Patent Publication No. CN209535341U discloses a split frame structure for motorcycles, in which the bracket and the frame body are detachably connected to solve the problem of inconvenient battery removal and assembly. However, such detachable connection methods in the prior art still have certain limitations, such as connection stability and vibration suppression, which still need to be optimized. Utility Model Content

[0004] The utility model aims to provide a tubular motorcycle frame to improve the connection stability of a bracket assembly.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tubular motorcycle frame comprises a frame body and a bracket assembly detachably connected to the lower part of the frame body, the bracket assembly comprises a left bracket, a right bracket, a front crossbeam and a rear crossbeam, the left bracket and the right bracket are located on both sides of the center line of the frame body, the ends of the left bracket and the right bracket close to the front of the vehicle are fixedly connected to the front crossbeam, the ends of the left bracket and the right bracket away from the front of the vehicle are fixedly connected to the rear crossbeam, and the front crossbeam and the rear crossbeam are detachably connected to the frame body.

[0007] The principle and advantage of this solution are: by setting the front crossbeam and the rear crossbeam on the bracket assembly, the bracket assembly can be easily detachably connected to the frame body, which is convenient for installing heavy objects such as batteries, motors or engines on the bracket assembly, and then fixing the bracket assembly to the frame body, which greatly facilitates the disassembly and assembly of the bracket assembly. In addition, considering that the motor / engine on the bracket assembly will generate vibration when working, this solution changes the traditional welding method to a bolt connection method, which prolongs the transmission path of the vibration energy, helps it gradually attenuate during the transmission process, thereby effectively reducing the vibration of the whole vehicle.

[0008] In addition, the setting of left and right support beams and front and rear cross beams not only significantly enhances the load-bearing capacity of the bracket assembly, but also greatly improves the load-bearing stability. At the same time, the cross beams are connected to the main frame, which significantly enhances the connection stability between the bracket assembly and the main frame, ensuring the safety and comfort of the motorcycle under various road conditions.

[0009] Preferably, as an improvement, both ends of the front cross beam and the rear cross beam are in straight tube structure, and the frame body is provided with connecting holes that can face the straight tube ports; the front cross beam / rear cross beam is an integral straight tube, and the integral straight tube is used to insert bolts that pass through the straight tube and the connecting holes to connect the frame body to the cross beam; or a threaded hole is provided in the straight tube, and the threaded hole is used to connect the frame body to the cross beam by bolts.

[0010] This solution, whether it is an integral straight tube structure or a threaded hole processed in the straight tube, can enable the frame body and the crossbeam to be fixedly connected by bolts. If it is an integral straight tube, it is only necessary to insert a bolt that passes through the connection hole and the straight tube. The straight tube is located between the two connection holes, and then a nut is tightened against the end face of the connection hole to achieve a detachable connection between the frame body and the crossbeam. The operation is simple and convenient.

[0011] If the straight tube itself has a threaded hole, you only need to directly screw the bolts to facilitate the detachable connection between the frame body and the crossbeam, and the operation is also simple and convenient.

[0012] The front cross beam and the rear cross beam are both in a straight tube structure, so that the front cross beam and the rear cross beam can be fixedly connected to the frame body at both ends by a bolt, further simplifying the connection between the bracket assembly and the frame body while ensuring the connection strength.

[0013] Preferably, as an improvement, a U-shaped connecting plate is fixed on the frame body, the middle abdomen of the connecting plate is welded to the cross tube provided on the frame body, and connecting holes are provided on the left and right wings of the connecting plate, and the connecting holes can be aligned with the hollow position of the straight tube of the front beam or the rear beam.

[0014] Beneficial effect: When this solution is adopted, the U-shaped connecting plate is provided to ensure the ease of installation of the bracket assembly and to prolong the time for the vibration to reach other parts of the frame body, thereby further improving the vibration reduction performance and the comfort of the motorcycle.

[0015] Preferably, as an improvement, a notch is provided in the middle portion where the connecting plate is connected to the cross tube, which helps to release vibration energy while reducing material costs and welding costs.

[0016] Preferably, as an improvement, a support seat is welded on the vertical pipe of the frame body, and a lock seat is detachably connected to the support seat. This solution breaks the conventional method of directly welding the lock seat to the vertical pipe and changes it to a method of detachably connecting the lock seat to the support seat, thereby simplifying the difficulty of installing the lock seat.

[0017] Preferably, as an improvement, the frame body is provided with a left upper tube and a right upper tube connected to the seat tube, the left upper tube and the right upper tube are symmetrical about the center line of the frame body, and the support seat is welded to the seat tube, the left upper tube and the right upper tube at the same time to improve the strength of the frame body, thereby achieving dual purpose of the support seat.

[0018] Preferably, as an improvement, the support seat is provided with a plurality of mounting holes for connecting the lock seat, and the lock seat is provided with matching holes aligned with the mounting holes, so that the lock seat can be conveniently secured on the support seat through the plurality of mounting holes.

[0019] Preferably, as an improvement, at least one of the matching holes is a circular hole, and the remaining matching holes are bar-shaped holes, so as to reduce the precision requirement on the matching dimensions of the support seat and the lock seat.

[0020] Preferably, as an improvement, the strip holes are divided into transverse strip holes and longitudinal strip holes to ensure that there is an adjustment margin when the lock seat is fixedly installed, reducing the requirements for the processing technology or the matching technology, and ensuring that the lock seat can be firmly fixed on the support seat.

[0021] Preferably, as an improvement, it also includes a mounting plate spanning the left / right support tube and fixedly connected to the support tube, and the middle portion of the mounting plate is hollowed out to enhance the strength of the bracket assembly while facilitating the use of the mounting plate to install other parts of the motorcycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure after rotating 90°.

[0024] Figure 3 for Figure 1 main view.

[0025] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure when the bracket assembly is not connected to the frame body.

[0026] Figure 5 for Figure 2 A schematic diagram of the three-dimensional structure when the bracket assembly is not connected to the frame body.

[0027] Figure 6 for Figure 4main view.

[0028] Figure 7 for Figure 4 Schematic diagram of the three-dimensional structure of the middle bracket assembly.

[0029] Figure 8 for Figure 7 Schematic diagram of the installation position of the bracket assembly and the cross tube and connecting plate on the frame body.

[0030] Fig. 9 This is an exploded schematic diagram showing the relationship between the support seat and the lock seat on the frame body of the utility model. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The figure marks in the drawings of the specification include: frame body 10, seat tube 11, left upper tube 12, right upper tube 13, left lower tube 14, right lower tube 15, cross tube 16, support seat 17, mounting hole 171, lock seat 18, matching hole 181, connecting plate 19, connecting hole 191, notch 192, bracket assembly 20, left tube 21, right tube 22, front cross beam 23, rear cross beam 24, mounting plate 25.

[0033] The embodiment is basically as shown in the attached Figures 1 to 9 shown.

[0034] A tubular motorcycle frame comprises a frame body 10 and a bracket assembly 20 bolted to the lower part of the frame body 10.

[0035] The frame body 10 includes a seat tube 11, a left upper tube 12, a right upper tube 13, a left lower tube 14, a right lower tube 15, a cross tube 16, a support seat 17 and a lock seat 18. The seat tube 11, the left upper tube 12 and the right upper tube 13: the seat tube 11 is located on the center line of the frame body 10, the left upper tube 12 and the right upper tube 13 are symmetrically distributed on both sides of the frame body 10 and are both welded to the seat tube 11; the left lower tube 14 and the right lower tube 15 are also symmetrically distributed on both sides of the frame body 10 and are both welded to the seat tube 11, the lower tube is located directly below the upper tube, and in this embodiment, the size of the lower tube is larger, the left upper tube 12 and the right upper tube 13 and the seat tube 11, the left lower tube 14 and the right lower tube 15 and the seat tube 11 all form a stable triangular structure, thereby enhancing the overall strength of the frame.

[0036] The support seat 17 is welded to the seat tube 11 and connected to the left upper tube 12 and the right upper tube 13 to enhance the structural strength of the frame body 10. The lock seat 18 is no longer directly welded to the seat tube 11, but is detachably connected to the support seat 17, which simplifies the installation and maintenance process of the lock seat 18 and improves the flexibility of use.

[0037] Combination Fig. 9Specifically, the support seat 17 is provided with three mounting holes 171 for connecting the lock seat 18, and the mounting holes 171 are threaded holes. The lock seat 18 is provided with matching holes 181 aligned with the mounting holes 171, so that the lock seat 18 can be easily fixed on the support seat 17 through the three mounting holes 171. One of the matching holes 181 is a round hole, and the remaining matching holes 181 are strip holes. The strip holes are divided into transverse strip holes and longitudinal strip holes to ensure that there is an adjustment margin when the lock seat 18 is fixedly installed, reducing the requirements for the processing technology or matching technology, and ensuring that the lock seat 18 can be firmly installed on the support seat 17.

[0038] A cross tube 16 is welded between the left lower tube 14 and the right lower tube 15, and a cross tube 16 is also welded to the bottom of the frame body 10 extending downward from the left and right lower tubes. A U-shaped connecting plate 19 is welded to each cross tube 16, and the middle abdomen of the U-shaped connecting plate 19 is welded to the cross tube 16. The left and right wings are processed with connecting holes 191, and the connecting holes 191 are used to connect with the bracket assembly 20.

[0039] Combination Figure 7 and Figure 8 The bracket assembly 20 includes a left bracket 21, a right bracket 22, a front cross beam 23, a rear cross beam 24 and a mounting plate 25. The left bracket 21 and the right bracket 22 are symmetrically distributed on both sides of the frame body 10. The front and rear ends of the left bracket 21 and the right bracket 22 are respectively welded to the front cross beam 23 and the rear cross beam 24 to form a stable support frame to ensure the load-bearing capacity and stability of the bracket assembly 20, which is suitable for carrying heavy objects such as batteries and motors.

[0040] The front cross beam 23 and the rear cross beam 24 adopt an integral straight tube structure, and the two ends are connected to the U-shaped connecting plate 19 of the frame body 10 by bolts to form a detachable connection (specifically, the connecting hole 191 is directly aligned with the straight tube, and then the bolts that penetrate the cross beam and the connecting holes 191 at both ends are inserted into the cross beam and the connecting holes 191, and finally nuts are screwed on both ends of the bolts, and the nuts are pressed against the wings of the connecting plate 19 to form a detachable installation of the bracket assembly 20 on the connecting plate 19). The straight tube structure simplifies the connection process, ensures the connection strength, and facilitates the rapid disassembly and assembly of the bracket assembly 20, thereby improving maintenance efficiency.

[0041] A notch 192 is processed in the middle portion where the connecting plate 19 is connected to the cross tube 16 . The notch 192 helps to release vibration energy while reducing material costs and welding costs.

[0042] Enhanced design of the mounting plate 25: the mounting plate 25 spanning the left tube holder 21 and the right tube holder 22 is welded to the left and right tube holders, and the middle of the mounting plate 25 is hollowed out, which enhances the strength of the bracket assembly 20 and provides a convenient space for installing other parts of the motorcycle.

[0043] In this embodiment, by providing the front cross beam 23 and the rear cross beam 24 on the bracket assembly 20, the bracket assembly 20 can be very conveniently detachably connected to the frame body 10. The design of this embodiment facilitates the installation of heavy objects such as batteries and motors on the bracket assembly 20, and then the bracket assembly 20 is fixedly connected to the frame body 10, which greatly facilitates the disassembly and assembly of the bracket assembly 20 and improves the maintenance efficiency and flexibility of the motorcycle.

[0044] Taking into account that the motor on the bracket assembly 20 will generate vibration when working, this embodiment effectively extends the transmission path of the vibration energy by changing the traditional welding method to a bolt connection method, so that the vibration energy gradually decays during the transmission process, thereby effectively reducing the vibration of the entire vehicle and improving the driving comfort of the motorcycle.

[0045] In addition, the arrangement of the left and right tube supports and the front and rear cross beams not only significantly enhances the load-bearing capacity of the bracket assembly 20, but also greatly improves the load-bearing stability, thereby ensuring the safety of the battery or motor installed on the bracket assembly 20 during driving.

[0046] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A tubular motorcycle frame, comprising a frame body and a bracket assembly detachably connected to the lower part of the frame body, characterized in that: The bracket assembly includes a left support bracket, a right support bracket, a front crossbeam and a rear crossbeam. The left support bracket and the right support bracket are located on both sides of the center line of the frame body. The ends of the left and right support brackets close to the front of the vehicle are fixedly connected to the front crossbeam, and the ends of the left and right support brackets away from the front of the vehicle are fixedly connected to the rear crossbeam. The front crossbeam and the rear crossbeam are both detachably connected to the frame body.

2. A tubular motorcycle frame according to claim 1, characterized in that: Both ends of the front cross beam and the rear cross beam are in straight tube structure, and the frame body is provided with connection holes that can face the straight tube ends; The front cross beam / rear cross beam is an integral straight tube, in which bolts passing through the straight tube and the connecting holes are inserted to connect the frame body with the cross beam; or threaded holes are provided in the straight tube, and the threaded holes are used to connect the frame body with the cross beam through bolts.

3. A tubular motorcycle frame according to claim 2, characterized in that: A U-shaped connecting plate is fixed on the frame body, the middle abdomen of the connecting plate is welded to the transverse tube provided on the frame body, and connecting holes are provided on the left and right wings of the connecting plate, which can be aligned with the hollow position of the straight tube of the front beam or the rear beam.

4. A tubular motorcycle frame according to claim 3, characterized in that: A notch is provided in the middle of the connection plate where it is connected to the transverse tube.

5. A tubular motorcycle frame according to any one of claims 1 to 4, characterized in that: A support seat is welded on the vertical pipe of the frame body, and a lock seat is detachably connected to the support seat.

6. A tubular motorcycle frame according to claim 5, characterized in that: The frame body is provided with a left upper tube and a right upper tube connected to the stand pipe, the left upper tube and the right upper tube are symmetrical about the center line of the frame body, and the support seat is welded to the stand pipe, the left upper tube and the right upper tube at the same time.

7. A tubular motorcycle frame according to claim 6, characterized in that: The support seat is provided with a plurality of mounting holes for connecting with the lock seat, and the lock seat is provided with matching holes aligned with the mounting holes.

8. A tubular motorcycle frame according to claim 7, characterized in that: At least one of the matching holes is a circular hole, and the remaining matching holes are strip holes.

9. A tubular motorcycle frame according to claim 8, characterized in that: The strip holes are divided into transverse strip holes and longitudinal strip holes.

10. A tubular motorcycle frame according to any one of claims 1-4, 6-9, characterized in that: It also includes a mounting plate that spans the left / right hosting and is fixedly connected to the hosting, and the middle portion of the mounting plate is hollowed out.

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