Frame structure of straddle type vehicle

Abstract

The invention provides a frame structure of a straddle type vehicle. The frame structure comprises a head pipe; the main pipe comprises an upper main pipe section and a lower main pipe section; each lower frame part comprises a lower frame part front section, a lower frame part rear section and a first fixing section, and a first included angle is formed between the lower frame part front section and the lower frame part rear section; each upper frame part comprises an upper frame part front section, an upper frame part rear section and a second fixing section, and the second fixing section is connected to one side of the lower frame part rear section of the corresponding lower frame part; and each rear frame part comprises a third fixing section and a rear frame part side section which extends backwards from the third fixing section and is connected with the first fixing section of the corresponding lower frame part.

Description

Technical Field

[0001] The present invention relates to a vehicle frame structure, in particular to a vehicle frame structure of a straddle-type vehicle. Background Art

[0002] See also Figure 1 Taiwan Patent Publication No. I226297 discloses a scooter-type vehicle 810, which includes: a pair of left and right upper frames 8113 extending downward and rearward from a head tube 8111; a pair of left and right lower tubes 8114 extending downward from the head tube 8111 below the pair of upper frames 8113; the lower end of each lower tube 8114 extending rearward and coupled to the lower portion of the pair of upper frames 8113, thereby providing a pair of upper frames 8113 and the pair of lower tubes 8114. 114 surrounds a space portion SP1 having a triangular shape when viewed from the side; a fuel tank 8230 is arranged in the space portion SP1, which is tilted forward and upward along the pair of upper frames 8113 and the pair of lower tubes 8114; a lower portion of the fuel tank 8230 is swollen and extends downward farther than the pair of lower tubes 8114, and is covered by a removable bottom frame 8143 positioned below the pair of lower tubes 8114; and a transverse frame 8131 and other components. Therefore, since the pair of upper frames 8113 and the pair of lower tubes 8114 are connected to the head tube 8111, a larger capacity of the fuel tank 8230 can be provided, but the space of the fuel tank 8230 is also reduced to a shape that is approximately triangular. In addition, the transverse frame 8131 causes the frame rigidity of the scooter-type vehicle 810 to be too strong and heavy, which also affects the riding experience of the rider.

[0003] See also Figure 2 , 3 , Taiwan Patent No. I274695 discloses a motorcycle frame, comprising: a main pipe unit 93, including a head pipe 931, and a main pipe 932, wherein the main pipe 932 has an upper pipe section 9321 connected to the head pipe 931 and extending downward and rearward, and a lower pipe section 9322 connected to the upper pipe section 9321 and extending downward; two first side pipe members 94, which are arranged on a part of the circumference of the main pipe 932 oppositely and at intervals, each first side pipe member 94 has a first front pipe section 941 arranged on the main pipe 932 and extending downward, and a first rear pipe section 942 connected to the first front pipe section 941 and extending rearward; and a cross pipe member 95, which is arranged at the bottom end of the lower pipe section 9322 of the main pipe 932 and connects the first front pipe sections 941 of the two first side pipe members 94. Furthermore, the motorcycle frame further includes two second side pipes 97 which are oppositely and spaced apart and arranged on a portion of the circumference of the main pipe 932 and located above the two first side pipes 94, so as to form a double-layer structure.

[0004] Since the motorcycle frame disclosed in the aforementioned Taiwan Patent No. I274695 is a double-layer structure, it can provide space for a larger fuel tank (not shown) to increase the endurance. Figure 3 As shown, since a transverse frame 96 must be used in the central portion of the motorcycle frame to carry a seat cushion (not shown) and to reinforce the longitudinal rigidity of the motorcycle frame, the motorcycle frame is heavier. Summary of the invention

[0005] [Problems to be solved by the invention]

[0006] Conventional frame structures were unable to simultaneously support a larger fuel tank and provide a lightweight frame having appropriate rigidity and flexibility. The present invention is completed in view of the above-mentioned problems. Therefore, an object of the present invention is to provide a frame structure for a straddle-type vehicle.

[0007] [Technical means to solve the problem]

[0008] Therefore, the frame structure of the straddle-type vehicle of the present invention comprises: a head tube; a main tube, including an upper main tube section connected to the head tube and extending downward and rearward, and a lower main tube section connected to the upper main tube section and extending downward; a pair of lower frame parts, each lower frame part comprises a lower frame part front section connected to one side of the lower main tube section, a lower frame part rear section connected to the lower frame part front section and extending rearward and upward, and a first fixing section provided on one end of the lower frame part rear section away from the lower frame part front section, and a first angle is formed between the lower frame part front section and the lower frame part rear section; a pair of upper frame parts, each lower frame part comprises a lower frame part front section connected to one side of the lower main tube section, a lower frame part rear section connected to the lower frame part front section and extending rearward and upward, and a first fixing section provided on one end of the lower frame part rear section away from the lower frame part front section, and a first angle is formed between the lower frame part front section and the lower frame part rear section; An upper frame portion includes a front section of the upper frame portion connected to one side of the upper main pipe section, a rear section of the upper frame portion connected to the front section of the upper frame portion and extending backward, and a second fixed section provided on an end of the rear section of the upper frame portion away from the front section of the upper frame portion, the second fixed section is connected to one side of the rear section of the lower frame portion of the corresponding lower frame portion; and a pair of rear frame portions, each rear frame portion includes a third fixed section connected to one side of the rear section of the upper frame portion of the corresponding upper frame portion, and a rear frame portion side section extending backward from the third fixed section and connected to the first fixed section of the corresponding lower frame portion.

[0009] In some embodiments of the present invention, when viewed from a side direction, the rear section of the lower frame portion of the lower frame portion, the rear section of the upper frame portion of the upper frame portion, and the rear frame portion surround a triangle.

[0010] In some embodiments of the present invention, a second angle is formed between the front section of the upper frame portion and the rear section of the upper frame portion.

[0011] In some embodiments of the present invention, the main pipe further includes a transverse pipe member, which is disposed on the bottom end of the lower main pipe section, and whose left and right ends are respectively connected to the pair of lower frame front sections.

[0012] In some embodiments of the present invention, a lower frame hanger is further included, wherein left and right ends of the lower frame hanger are respectively connected to the pair of lower frame front sections.

[0013] In some embodiments of the present invention, an upper frame hanger is further included, wherein left and right ends of the upper frame hanger are respectively connected to the pair of rear frame side sections.

[0014] In some embodiments of the present invention, the tube diameter of the upper frame portion is smaller than the tube diameter of the lower frame portion, and the tube diameter of the lower frame portion is smaller than the tube diameter of the rear frame portion.

[0015] In some embodiments of the present invention, when viewed from a side direction, the main pipe, the upper frame portion, and the lower frame portion surround a quadrilateral.

[0016] In some embodiments of the present invention, when viewed from a side direction, the main pipe, the upper frame portion, and the lower frame portion surround a pentagon, and the second angle is an obtuse angle.

[0017] In some embodiments of the present invention, a first spacing between front sections of the pair of upper frame portions is smaller than a second spacing between the pair of lower frame portions.

[0018] In some embodiments of the present invention, an oil tank and an oil pump installed on the oil tank are provided, wherein, when viewed from a top view, a third spacing between the rear sections of the pair of upper frame parts is greater than the first spacing, thereby forming an oil pump maintenance space that is conducive to maintaining the oil pump.

[0019] In some embodiments of the present invention, the first angle is an obtuse angle.

[0020] [Effects of the Invention]

[0021] The effects of the present invention are as follows: (1) the frame structure of the straddle-type vehicle of the present invention does not need to be provided with the transverse frame in the aforementioned Taiwan Patent No. I274695, and therefore can be lightweight, and can still achieve appropriate rigidity, that is, the optimal rigidity balance, and can support a larger fuel tank to improve the endurance of the straddle-type vehicle; (2) the left and right ends of the transverse tube are respectively connected to the front sections of the pair of lower frame parts to strengthen the rigidity of the frame structure; (3) the pipe diameter of the upper frame part is less than the pipe diameter of the lower frame part and less than the rear frame part, so that the frame structure can be further lightweight and the flexibility of the frame structure can be increased; (4) the triangular structure surrounded by the rear section of the lower frame part, the rear section of the upper frame part and the rear frame part can greatly improve the rigidity of the frame structure; (5) the main pipe, the upper frame The upper frame part and the lower frame part can surround a quadrilateral or a pentagon to increase the space for accommodating the fuel tank in the frame structure, and especially in the case of a pentagon, better frame flexibility can be provided; (6) the lower frame hanger can be used to carry the engine and improve the rigidity of the frame structure; (7) the present invention can also modularly connect the left and right ends of the upper frame hanger to the pair of rear frame side sections to carry different engines, which can also improve the rigidity of the frame structure; (8) because the first spacing between the front sections of the pair of upper frame parts is smaller than the second spacing between the pair of lower frame parts, the frame structure can be made lighter and the pedal space for the driver can be increased; (9) the third spacing is larger than the first spacing, so a maintenance space for the fuel pump can be formed to facilitate the maintenance of the fuel pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, in which:

[0023] Figure 1 is a perspective view illustrating a scooter-type vehicle disclosed in Taiwan Patent Publication No. I226297;

[0024] Figure 2 is a left side view illustrating a motorcycle frame disclosed in Taiwan Patent No. I274695;

[0025] Figure 3 It is a three-dimensional diagram, explaining Figure 2 of existing motorcycle frames;

[0026] Figure 4 is a perspective view illustrating a straddle-type vehicle to which the embodiment of the frame structure of the straddle-type vehicle of the present invention is applicable;

[0027] Figure 5 is a left side view illustrating the frame structure of the straddle-type vehicle in this embodiment;

[0028] Figure 6 is a three-dimensional diagram illustrating the frame structure in this embodiment;

[0029] Figure 7 is a top view illustrating the frame structure in this embodiment;

[0030] Figure 8 is a left side view, illustrating that in this embodiment, a main pipe, an upper frame portion, and a lower frame portion of the frame structure surround a pentagon;

[0031] Fig. 9 is a perspective view illustrating a lower frame hanger of the frame structure in this embodiment; and

[0032] Fig.10 It is a left side view, illustrating that in other embodiments of the present invention, the main pipe, the upper frame portion and the lower frame portion can also surround a quadrilateral.

[0033] Reference numerals list

[0034] 1. Head pipe

[0035] 2. Supervisor

[0036] 21···Upper supervisor section

[0037] 22···lower main section

[0038] 23···Horizontal pipe fittings

[0039] 3····Lower frame

[0040] 31···Front section of lower frame

[0041] 32···lower frame rear section

[0042] 33···First fixed section

[0043] 4····Upper frame

[0044] 41···front section of upper frame

[0045] 42···Upper frame rear section

[0046] 43···Second fixed section

[0047] 5····Rear frame

[0048] 51···Third fixed section

[0049] 52···Rear frame side section

[0050] 61···Lower frame hanger

[0051] 62···Upper frame hanger

[0052] 71···Fuel tank

[0053] 72···Engine

[0054] 73···Oil pump

[0055] 74···Front wheel

[0056] 75···Rear wheel

[0057] F····Foot Space

[0058] R····Oil pump maintenance space

[0059] S1···First spacing

[0060] S2···Second spacing

[0061] S3···Third spacing

[0062] α···First angle

[0063] β···the second angle. DETAILED DESCRIPTION

[0064] See also Figures 4 to 6 The embodiment of the frame structure of the straddle-type vehicle of the present invention is used for a straddle-type vehicle. In this embodiment, the straddle-type vehicle includes a frame structure, and components such as a fuel tank 71, an engine 72, an oil pump 73, a front wheel 74, and a rear wheel 75 disposed on the frame structure.

[0065] In this embodiment, the frame structure includes a head pipe 1, a main pipe 2, a pair of lower frame parts 3, a pair of upper frame parts 4, a pair of rear frame parts 5, and a lower frame part hanger 61.

[0066] In this embodiment, the main pipe 2 includes an upper main pipe section 21 connected to the head pipe 1 and extending downward and rearward, a lower main pipe section 22 connected to the upper main pipe section 21 and extending downward, and a cross pipe member 23 .

[0067] See also Figures 5 to 8 In this embodiment, each lower frame portion 3 includes a lower frame portion front section 31 connected to one side of the lower main pipe section 22, a lower frame portion rear section 32 connected to the lower frame portion front section 31 and extending backward and upward, and a first fixing section 33 provided on one end of the lower frame portion rear section 32 away from the lower frame portion front section 31, wherein a first angle α is formed between the lower frame portion front section 31 and the lower frame portion rear section 32. In this embodiment, the first angle α is an obtuse angle, such as Figure 8 shown.

[0068] In this embodiment, the cross tube 23 is disposed on the bottom end of the lower main tube section 22 , and its left and right ends are respectively connected to the pair of lower frame front sections 31 to enhance the rigidity of the frame structure.

[0069] In the present embodiment, each upper frame portion 4 includes an upper frame front section 41 connected to one side of the upper main pipe section 21, an upper frame rear section 42 connected to the upper frame front section 41 and extending rearward, and a second fixed section 43 provided on one end of the upper frame rear section 42 away from the upper frame front section 41, wherein the second fixed section 43 is connected to one side of the lower frame rear section 32 of the corresponding lower frame portion 3.

[0070] In this embodiment, each rear frame portion 5 includes a third fixing section 51 connected to one side of the upper frame portion rear section 42 of the corresponding upper frame portion 4, and a rear frame portion side section 52 extending backward from the third fixing section 51 and connected to the corresponding first fixing section 33 of the lower frame portion 3.

[0071] Therefore, the main function of the frame structure of the straddle-type vehicle of the present invention is that, since there is no need to set up the transverse frame in the aforementioned Taiwan Patent No. I274695, the frame structure of the straddle-type vehicle of the present invention can be lightweight and still achieve appropriate rigidity, that is, the optimal rigidity balance, and can support a larger fuel tank 71 to improve the endurance of the straddle-type vehicle.

[0072] In addition, in the present embodiment, the tube diameter of the upper frame portion 4 is smaller than the tube diameter of the lower frame portion 3, and the tube diameter of the lower frame portion 3 is smaller than the tube diameter of the rear frame portion 5, that is, the tube diameter of the upper frame portion 4 < the tube diameter of the lower frame portion 3 < the rear frame portion 5, so that the frame structure can be further lightweight and the flexibility of the frame structure can be improved.

[0073] like Figure 8 As shown, in this embodiment, when viewed from the side of the straddle-type vehicle, the lower frame portion rear section 32 of the lower frame portion 3, the upper frame portion rear section 42 of the upper frame portion 4, and the rear frame portion 5 surround a triangle, as shown in FIG. Figure 8 As shown by the two-point chain line in FIG. 1 , the rigidity of the frame structure can be greatly improved by utilizing the triangular structure.

[0074] In this embodiment, Figure 8 When viewed from the side direction shown in FIG. 1 , a second angle β (e.g., Figure 8 As shown in the obtuse angle), the main pipe 2, the upper frame portion 4, and the lower frame portion 3 surround a pentagon (as shown in the obtuse angle). Figure 8), so as to provide better frame flexibility and increase the space of the frame structure to accommodate the fuel tank 71. However, it should be particularly pointed out that the present invention is not limited to the main pipe 2, the upper frame part 4 and the lower frame part 3 forming a pentagon. In other embodiments of the present invention, it can also be as follows Fig.10 As shown, the main pipe 2, the upper frame portion 4 and the lower frame portion 3 surround a quadrilateral, which can also achieve the effect of increasing the space of the frame structure to accommodate the oil tank 71.

[0075] See also Figure 5 , 6 9. In the present embodiment, since the left and right ends of the lower frame hanger 61 are respectively connected to the pair of lower frame front sections 31, the lower frame hanger 61 can be used to carry the engine 72 and at the same time can improve the rigidity of the frame structure.

[0076] See also Figure 8 In other embodiments of the present invention, the left and right ends of an upper frame hanger 62 can also be modularly connected to the pair of rear frame side sections 52 to carry different engines, while also being able to improve the rigidity of the frame structure.

[0077] See also Figure 4 , 7 In the present embodiment, a first spacing S1 between the front sections 41 of the pair of upper frame portions is smaller than a second spacing S2 between the pair of lower frame portions 3, thereby making the frame structure lightweight and increasing the footrest space F for the driver.

[0078] like Figure 7 As shown, in this embodiment, when viewed from a top view, a third distance S3 between the pair of upper frame rear sections 42 is greater than the first distance S1, thereby forming an oil pump maintenance space R that is conducive to maintaining the oil pump 73.

[0079] In summary, the present invention has at least the following advantages and effects: (1) Since the frame structure of the straddle-type vehicle of the present invention does not need to be provided with the transverse frame in the aforementioned Taiwan Patent No. I274695, it can be lightweight and still achieve appropriate rigidity, that is, the optimal rigidity balance, and can support a larger fuel tank 71 to improve the endurance of the straddle-type vehicle; (2) The left and right ends of the transverse tube 23 are respectively connected to the pair of lower frame front sections 31 to strengthen the rigidity of the frame structure; (3) The pipe diameter of the upper frame section 4 is less than the pipe diameter of the lower frame section 3 and less than the rear frame section 5, so the frame structure can be further lightweight and the flexibility of the frame structure can be increased; (4) The triangular structure surrounded by the lower frame rear section 32, the upper frame rear section 42 and the rear frame section 5 can greatly improve the rigidity of the frame structure; (5) The main pipe 2, the upper frame section 4 and the lower frame The three parts 3 can surround a quadrilateral or a pentagon to achieve the effect of increasing the space for accommodating the fuel tank 71 of the frame structure, and especially in the case of a pentagon, it can also provide better frame flexibility; (6) The lower frame hanger 61 can be used to carry the engine 72 and at the same time improve the rigidity of the frame structure; (7) The present invention can also modularly connect the left and right ends of the upper frame hanger 62 to the pair of rear frame side sections 52 to carry different engines, which can also improve the rigidity of the frame structure; (8) Because the first spacing S1 between the pair of upper frame front sections 41 is smaller than the second spacing S2 between the pair of lower frame parts 3, the frame structure can be made lighter and the driver's footrest space F can be increased; (9) The third spacing S3 is larger than the first spacing S1, so the fuel pump maintenance space R can be formed to facilitate the maintenance of the fuel pump 73; therefore, the purpose of the present invention can be achieved.

[0080] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.

Claims

1. A frame structure of a straddle-type vehicle, characterized in that: Include: One end pipe; A main pipe, comprising an upper main pipe section connected to the head pipe and extending downward and rearward, and a lower main pipe section connected to the upper main pipe section and extending downward; A pair of lower frame parts, each lower frame part includes a lower frame part front section connected to one side of the lower main pipe section, a lower frame part rear section connected to the lower frame part front section and extending backward and upward, and a first fixing section provided on one end of the lower frame part rear section away from the lower frame part front section, and a first angle is formed between the lower frame part front section and the lower frame part rear section; A pair of upper frame parts, each upper frame part includes an upper frame part front section connected to one side of the upper main pipe section, an upper frame part rear section connected to the upper frame part front section and extending rearward, and a second fixing section provided on one end of the upper frame part rear section away from the upper frame part front section, the second fixing section is connected to one side of the lower frame part rear section of the corresponding lower frame part; and A pair of rear frame parts, each rear frame part includes a third fixing section connected to one side of the rear section of the upper frame part of the corresponding upper frame part, and a rear frame part side section extending backward from the third fixing section and connected to the first fixing section of the corresponding lower frame part.

2. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: When viewed from the side, the rear section of the lower frame portion of the lower frame portion, the rear section of the upper frame portion of the upper frame portion, and the rear frame portion surround a triangle.

3. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: A second angle is formed between the front section of the upper frame portion and the rear section of the upper frame portion.

4. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: The main pipe also includes a transverse pipe member, which is arranged on the bottom end of the lower main pipe section, and the left and right ends of the transverse pipe member are respectively connected to the front sections of the pair of lower frame parts.

5. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: It also comprises a lower frame hanger, wherein the left and right ends of the lower frame hanger are respectively connected to the pair of lower frame front sections.

6. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: It also comprises an upper frame hanger, wherein the left and right ends of the upper frame hanger are respectively connected to the pair of rear frame side sections.

7. The frame structure of a straddle-type vehicle according to any one of claims 1 to 6, characterized in that: The pipe diameter of the upper frame portion is smaller than the pipe diameter of the lower frame portion, and the pipe diameter of the lower frame portion is smaller than the pipe diameter of the rear frame portion.

8. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: When viewed from the side, the main pipe, the upper frame portion, and the lower frame portion surround a quadrilateral.

9. The frame structure of a straddle-type vehicle according to claim 3, characterized in that: When viewed from the side, the main pipe, the upper frame portion, and the lower frame portion surround a pentagon, and the second angle is an obtuse angle.

10. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: A first spacing between the front sections of the pair of upper frame portions is smaller than a second spacing between the pair of lower frame portions.

11. The frame structure of a straddle-type vehicle according to claim 10, characterized in that: It is suitable for setting up an oil tank and an oil pump arranged on the oil tank, wherein, when viewed from a top view, a third spacing of the rear section of the upper frame portion of the upper frame portion is larger than the first spacing, thereby forming an oil pump maintenance space that is conducive to repairing the oil pump.

12. The frame structure of a straddle-type vehicle according to claim 1, characterized in that: The first angle is an obtuse angle.

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