Combined frame structure for motorcycle

Abstract

The utility model relates to the technical field of motorcycle frames, and discloses a combined frame structure for a motorcycle, which comprises a left reference frame, a right reference frame and a connecting unit, the connecting unit comprises a front suspension steering connecting structure, a supporting structure and a rear suspension connecting structure, the left reference frame, the right reference frame, the front suspension steering connecting structure, the supporting structure and the rear suspension connecting structure are all of an integrated structure formed through die casting. The frame is divided into the left reference frame, the right reference frame and the multiple connecting units in the middle, rapid assembly and disassembly of the frame can be achieved through modular design, the left reference frame, the right reference frame and the connecting structures are all made of alloy materials through a high-precision die-casting process, and the stability of frame combination is improved; a unique steering main beam connecting structure is adopted in the front suspension position, the flexibility and stability of a vehicle head part are guaranteed, and the suspension supporting force of a vehicle tail part meets the stress requirement under the limiting working condition.

Description

Technical Field

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

[0002] Traditional motorcycle frames are typically formed using steel tubes and steel plates followed by welding or aluminum alloy casting. While assembled steel frames offer ample space and design flexibility, they also suffer from numerous parts, extensive welding, and significant deformation. Aluminum alloy frames offer the advantages of lightweight, high strength, and a reduced number of parts, but their integrated casting process limits design flexibility, restricts available space, and places high demands on production equipment and mold investment. Therefore, assembled frames remain the mainstream form in the current motorcycle market. Improving the structural strength of these frames is a pressing issue. Utility Model Content

[0003] The purpose of the present utility model is to provide a combined frame structure for a motorcycle to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a combined frame structure for a motorcycle, comprising a left reference frame, a right reference frame, and a connecting unit arranged between the left reference frame and the right reference frame, wherein the connecting unit comprises a front suspension steering connecting structure, a support structure, and a rear suspension connecting structure, and the left reference frame, the right reference frame, the front suspension steering connecting structure, the support structure, and the rear suspension connecting structure are all integral structures formed by die casting.

[0005] The following improvements are made in the present application: the front suspension steering connection structure includes a main connecting tube, and an upper connecting plate and a lower connecting plate are respectively arranged on the outer sides of both ends of the main connecting tube. The upper connecting plate and the lower connecting plate are connected to the left reference frame and the right reference frame by screws.

[0006] The following improvements are made in the present application: a fixing plate is provided at the bottom of the main connecting pipe, and a reinforcement is provided between the two upper connecting plates and the connecting plate. One end of the reinforcement is connected to the main connecting pipe, and the other end is connected to the fixing plate.

[0007] The following improvements are made in the present application: the support structure includes a transverse plate and wing plates, the wing plates are respectively arranged at both ends of the transverse plate, and the ends of the two wing plates away from the transverse plate are respectively connected to the left reference frame and the right reference frame by screws.

[0008] The following improvements are made in the solution of the present application: the rear suspension connection structure is arranged in an I-shaped structure, and screw holes for connecting the left reference frame and the right reference frame are respectively opened at both ends of the rear suspension connection structure.

[0009] The following improvement is made in the solution of the present application: the bottom ends of the left reference frame and the right reference frame are respectively connected by chassis beams.

[0010] This application proposes the following improvements: the chassis beam is designed as an arc-shaped structure, with multiple equally spaced square grooves on one side of the bottom of the beam. These square grooves extend through both sides of the beam. Through-holes and weight-reducing grooves are provided on the sides of the beam, and a wavy recess is formed at the top of the beam. The through-holes are assembled with screws to the left and right reference frames, and the weight-reducing groove design effectively improves the vehicle's acceleration and braking performance.

[0011] The following improvements are made in the solution of the present application: the left reference frame includes a front suspension part, a rear suspension part and a connecting part, the connecting part is located between the front suspension part and the rear suspension part, and the right reference frame has the same structure as the left reference frame.

[0012] The following improvements are made in the present application: the front suspension part is arranged in a Y-shaped structure, the outer ends of the front suspension part heads of the left reference frame and the right reference frame are bent inward and assembled together by screws, and the end of the rear suspension part away from the connecting part is bent inward.

[0013] Compared with the prior art, the present invention provides a combined frame structure for a motorcycle, which has the following beneficial effects:

[0014] The utility model provides a combined frame structure for motorcycles, which is divided into two left and right reference frames and multiple connection units in the middle. The modular design can realize rapid assembly and disassembly of the frame, is convenient for transportation, storage and maintenance, and effectively reduces the cost of use; the left reference frame, the right reference frame and each connection structure are all manufactured by a high-precision die-casting process using alloy materials, which increases the stability of the frame combination, while ensuring accurate dimensions and high surface finish, which is conducive to reducing wind resistance; the front suspension position adopts a unique steering main beam intersection structure to ensure that the front part has both flexibility and stability, and the suspension support strength of the rear part meets the force requirements under extreme working conditions, and all components are connected by standardized screws, which are easy to install and disassemble, while ensuring the firmness of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is the structural diagram of the left reference frame;

[0017] Figure 3 It is a structural diagram of the chassis beam;

[0018] Figure 4 It is a schematic diagram of the front suspension steering connection structure;

[0019] Figure 5 is a schematic diagram of the support structure;

[0020] Figure 6 Schematic diagram of the rear suspension connection structure.

[0021] In the figure: 1. Left reference frame; 11. Front suspension part; 12. Rear suspension part; 13. Connection part; 2. Right reference frame; 3. Front suspension steering connection structure; 31. Main connecting pipe; 32. Upper connecting plate; 33. Lower connecting plate; 34. Fixed plate; 35. Reinforcement; 4. Support structure; 41. Cross plate; 42. Wing plate; 5. Rear suspension connection structure; 51. Screw hole; 6. Chassis beam; 61. Square groove; 62. Through hole; 63. Weight reduction groove; 64. Wave-shaped pit. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention:

[0023] like Figure 1 As shown, a modular frame structure for motorcycles is mainly composed of a left reference frame 1, a right reference frame 2 and a connecting unit. The modular design can realize rapid assembly and disassembly of the frame, facilitates transportation, storage and maintenance, and effectively reduces the cost of use; the left reference frame 1, the right reference frame 2 and the connecting unit are all made of aluminum alloy or magnesium alloy materials through a high-precision die-casting process, which increases the stability of the frame combination, while ensuring dimensional accuracy and high surface finish, which is beneficial to reducing wind resistance. Although the cost of alloy materials is higher than that of traditional materials, in the long run, due to the fuel savings and maintenance cost reduction brought about by its lightweight, the overall cost of ownership is lower. In order to extend the service life of the frame, the corrosion resistance of the alloy is enhanced by surface treatment technology, and the frame is used as part of the exterior decoration to reduce the use of plastic products. Aluminum alloy and magnesium alloy are also easy to recycle, melt and reuse, which is in line with the concept of green manufacturing and helps to reduce environmental pollution.

[0024] like Figure 2-3As shown, the left reference frame 1 and the right reference frame 2 have the same structure. The left reference frame 1 includes a front suspension part 11, a rear suspension part 12 and a connecting part 13. The connecting part 13 is located between the front suspension part 11 and the rear suspension part 12, wherein the front suspension part 11 is arranged in a Y-shaped structure. The outer ends of the heads of the front suspension parts 11 of the left reference frame 1 and the right reference frame 2 are bent inward, and the end of the rear suspension part 12 away from the connecting part 13 is bent inward, and are assembled together by screws respectively; at the same time, the bottom ends of the left reference frame 1 and the right reference frame 2 are respectively connected by a chassis beam 6 for placing the engine device. The chassis beam 6 is arranged in an arc structure, and a plurality of square grooves 61 are evenly spaced on one side of the bottom of the chassis beam 6. The square grooves 61 pass through both sides of the chassis beam 6. At the same time, a through hole 62 and a weight-reducing groove 63 are provided on the side of the chassis beam 6, and a wavy pit 64 is also provided on the top of the chassis beam 6. Due to the unique driving characteristics and force direction of two or three wheels, a simple combined frame cannot ensure that the force of the frame steering structure is reasonably transmitted to the rear of the vehicle body during driving. The frame CAE model is established by using the hypermesh software of the American Altiar company. The frame model scale is: 1224077 units, 414611 nodes. The motor and battery are simulated by mass units and rigid units. The passenger mass is 80Kg×2 people=160Kg, and is simulated by mass units and rigid units. The bolts are Beam and rigid units were used for simulation, and spring units were used to simulate the front and rear vibration dampers. The strength and stiffness of the frame were analyzed under static vertical load conditions, static bending and torsional load conditions, and extreme impact conditions. After multiple experiments and CAE (Computer-Aided Engineering) simulation analysis, the frame structure was optimized through finite element analysis. A unique steering main beam intersection structure was adopted at the front suspension position to ensure both flexibility and stability in the front part of the vehicle. The suspension support strength at the rear part met the force requirements under extreme conditions, thereby achieving high strength and good seismic performance while reducing weight.

[0025] like Figure 4-6As shown, the connection unit is arranged between the left reference frame 1 and the right reference frame 2, including a front suspension steering connection structure 3, a support structure 4 and a rear suspension connection structure 5. The left reference frame 1, the right reference frame 2, the front suspension steering connection structure 3, the support structure 4 and the rear suspension connection structure 5 are all an integral structure formed by die casting; the front suspension steering connection structure 3 includes a main connection pipe 31, and the outer sides of the two ends of the main connection pipe 31 are respectively provided with an upper connecting plate 32 and a lower connecting plate 33. The upper connecting plate 32 and the lower connecting plate 33 are connected to the left reference frame 1 and the right reference frame 2 by screws. The bottom of the main connection pipe 31 A fixing plate 34 is provided on the top, and a reinforcement 35 is provided between the two upper connecting plates 32 and the connecting plate 33. One end of the reinforcement 35 is connected to the main connecting pipe 31, and the other end is connected to the fixing plate 34; the supporting structure 4 is used to support the seat cushion, and is composed of a transverse plate 41 and a wing plate 42. The wing plates 42 are respectively arranged at both ends of the transverse plate 41, and the ends of the two wing plates 42 away from the transverse plate 41 are respectively connected to the left reference frame 1 and the right reference frame 2 by screws; the rear suspension connection structure 5 is arranged in an I-type structure, and screw holes 51 for connecting the left reference frame 1 and the right reference frame 2 are respectively provided at both ends of the rear suspension connection structure 5.

[0026] All components are connected by standardized screws, which are easy to install and disassemble while ensuring the firmness of the overall structure.

[0027] The above embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A modular frame structure for a motorcycle, characterized in that: The invention comprises a left reference frame (1), a right reference frame (2) and a connecting unit arranged between the left reference frame (1) and the right reference frame (2); the connecting unit comprises a front suspension steering connecting structure (3), a support structure (4) and a rear suspension connecting structure (5); the left reference frame (1), the right reference frame (2), the front suspension steering connecting structure (3), the support structure (4) and the rear suspension connecting structure (5) are all integral structures formed by die casting.

2. The combined frame structure for a motorcycle according to claim 1, characterized in that: The front suspension steering connection structure (3) comprises a main connection tube (31), an upper connecting plate (32) and a lower connecting plate (33) are respectively arranged on the outer sides of both ends of the main connection tube (31), and the upper connecting plate (32) and the lower connecting plate (33) are connected to the left reference frame (1) and the right reference frame (2) by screws.

3. The combined frame structure for a motorcycle according to claim 2, characterized in that: A fixing plate (34) is provided at the bottom of the main connecting pipe (31), and a reinforcing member (35) is provided between the two upper connecting plates (32) and the connecting plate (33). One end of the reinforcing member (35) is connected to the main connecting pipe (31), and the other end is connected to the fixing plate (34).

4. The combined frame structure for a motorcycle according to claim 1, characterized in that: The support structure (4) comprises a transverse plate (41) and wing plates (42), wherein the wing plates (42) are respectively arranged at both ends of the transverse plate (41), and the ends of the two wing plates (42) away from the transverse plate (41) are respectively connected to the left reference frame (1) and the right reference frame (2) by screws.

5. The combined frame structure for a motorcycle according to claim 1, characterized in that: The rear suspension connection structure (5) is arranged in an I-shaped structure, and screw holes (51) for connecting the left reference frame (1) and the right reference frame (2) are respectively provided at both ends of the rear suspension connection structure (5).

6. The modular frame structure for a motorcycle according to claim 1, characterized in that: The bottom ends of the left reference frame (1) and the right reference frame (2) are respectively connected via chassis beams (6).

7. The combined frame structure for a motorcycle according to claim 6, characterized in that: The chassis beam (6) is arranged in an arc-shaped structure, and a plurality of square grooves (61) are provided at equal intervals on one side of the bottom of the chassis beam (6), the square grooves (61) pass through both sides of the chassis beam (6), a through hole (62) and a weight-reducing groove (63) are provided on the side of the chassis beam (6), and a wave-shaped pit (64) is provided on the top of the chassis beam (6).

8. The modular frame structure for a motorcycle according to claim 1, characterized in that: The left reference frame (1) comprises a front suspension portion (11), a rear suspension portion (12) and a connecting portion (13), wherein the connecting portion (13) is located between the front suspension portion (11) and the rear suspension portion (12). The right reference frame (2) has the same structure as the left reference frame (1).

9. The combined frame structure for a motorcycle according to claim 8, characterized in that: The front suspension part (11) is arranged in a Y-shaped structure. The outer ends of the heads of the front suspension parts (11) of the left reference frame (1) and the right reference frame (2) are bent inward and assembled together by screws. The end of the rear suspension part (12) away from the connecting part (13) is bent inward.

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