Straddle type motorcycle

Abstract

The invention provides a straddle type motorcycle which comprises a frame unit, and the frame unit comprises a head pipe, a longitudinal pipe connected to the head pipe and extending downwards, a front transverse pipe connected to the lower end of the longitudinal pipe and extending transversely, two lower side pipes extending backwards from the front transverse pipe in parallel, and a rear side pipe connected to the lower end of the longitudinal pipe and extending backwards from the front transverse pipe. And the two upper side pipes are connected to the longitudinal pipe and extend backwards in a manner that the distance between the two upper side pipes is gradually increased. Due to the design that the upper side pipes of the frame unit are gradually contracted inwards from back to front, the overall structural rigidity is optimized at the positions connected to the longitudinal pipes by means of the narrow mutual distance. In addition, due to the appearance of the straddle type motorcycle in the front-back direction, the width of the straddle type motorcycle can be reduced, wind resistance borne by the straddle type motorcycle in the running process can be reduced, and meanwhile the oil consumption performance and the running performance are improved.

Description

TECHNICAL FIELD

[0001] The present invention relates to a vehicle, and more particularly to a straddle-type motorcycle. BACKGROUND

[0002] Reference Figure 1 For a conventional motorcycle frame device 1, the conventional motorcycle frame device 1 includes a head pipe 11, a down pipe 12 connected to the head pipe 11 and extending downward, upper side pipes 13 extending from the down pipe 12 to opposite sides and further extending rearwardly in a bent manner, a front cross pipe 14 connected to a bottom end of the down pipe 12 and extending in a transverse direction, lower side pipes 15 extending rearwardly from the front cross pipe 14 and located below the upper side pipes 13 in a transverse direction, and a rear cross pipe 16 connected to the upper side pipes 13 and located rearward of the front cross pipe 14. Each of the upper side pipes 13 includes a bent portion 131 connected to the down pipe 12 in a bent manner, and a straight portion 132 connected to the bent portion 131 in an integral manner and extending in a straight manner in a front-rear direction. The straight portions 132 of the upper side pipes 13 are parallel to each other, and the distance between the straight portions 132 is approximately the overall width of the motorcycle.

[0003] However, due to the distance between the upper side pipes 13, the width of the main power equipment such as a power motor, a battery tank, or an engine must be considered in the design, and in the case where the width of the power battery or the engine is fixed, the upper side pipes 13 cannot be arranged according to the principle that the narrower the distance between them, the higher the rigidity. Therefore, when the impact durability test is performed on the conventional motorcycle frame device 1, it is found that the upper side pipes 13 are indeed a weak link in the overall structure, and the straight portions 132 of the upper side pipes 13 are the most likely to be broken during the test.

[0004] In addition, if the power requirement of the motorcycle is considered, two batteries are required to be arranged side by side. At this time, since each battery has a fixed size, in order to provide space for the arrangement of the batteries in the frame device 1, the straight portions 132 of the upper side pipes 13 must be spaced apart by a certain distance. In the case where the distance between the straight portions 132 corresponds to the overall width of the motorcycle, the overall width of the motorcycle will be widened, and therefore the rider's legs are likely to be separated to the opposite sides during riding. At the time of parking when the feet need to be placed on the ground, the rider's foot placement will be limited by the width of the motorcycle. SUMMARY

[0005] [Problems to be Solved by the Invention]

[0006] Therefore, the object of the present invention is to provide a straddle-type motorcycle with good structural rigidity.

[0007] [Technical means to solve the problem]

[0008] Therefore, the present invention provides a straddle-type motorcycle comprising a frame unit including a head tube, a longitudinal tube connected to the head tube and extending downward, a front cross tube connected to the lower end of the longitudinal tube and extending laterally, two lower side tubes extending rearward parallel to each other from the front cross tube, and two upper side tubes connected to the longitudinal tube and extending rearward with increasing spacing between them.

[0009] In some embodiments of the present invention, the lower side tubes and the upper side tubes together define a mounting space that is narrower at the front and wider at the rear, and the straddle motorcycle further includes a controller disposed in the mounting space.

[0010] In some embodiments of the present invention, the frame unit further includes a rear cross tube connected to the rear end of the lower side tubes and disposed on the front and rear sides of the mounting space, respectively, as the front cross tube.

[0011] In some embodiments of the present invention, at least a portion of the longitudinal projection range of the controller overlaps with at least one of the lower tubes.

[0012] In some embodiments of the present invention, at least a portion of the projection range of the controller along the lateral direction overlaps with at least a portion of the front or rear horizontal tube.

[0013] In some embodiments of the present invention, the lower side tubes of the frame unit extend horizontally.

[0014] Some embodiments of the present invention also include a power motor disposed at the rear of the mounting space.

[0015] Some embodiments of the present invention also include at least one battery compartment disposed above the power motor.

[0016] Some embodiments of the present invention also include a riding unit disposed above the at least one battery compartment.

[0017] Some embodiments of the present invention also include a power motor disposed behind the upper side tubes of the frame unit, and a battery compartment disposed above the power motor and defining a plurality of slots spaced apart in the left-right direction.

[0018] [The effects achieved by this invention]

[0019] The present invention relates to a motorcycle with a frame unit in which the upper side tubes of the frame unit are designed to gradually taper inwards from rear to front, thereby optimizing the overall structural rigidity at the connection point with the longitudinal tube through a narrower spacing. Furthermore, the front-rear profile of the motorcycle is also reduced due to the forward-narrowing design of the upper side tubes, thus decreasing the width and reducing wind resistance during riding, while also improving fuel efficiency and riding performance.

[0020] In some embodiments of the invention, when the controller is disposed in the mounting space, the miniaturization of the motorcycle of the invention is still maintained due to the configuration of the upper tubes narrowing towards each other from back to front.

[0021] In some embodiments of the present invention, the controller is protected on the left and right sides by the upper and lower tubes, while the front and rear sides are protected by the front and rear horizontal tubes respectively, so that the controller can be stably supported in the longitudinal direction and protected from impact in all directions.

[0022] In some embodiments of the present invention, the configuration of the power motor, the at least one battery compartment, and the riding unit necessary for the straddle motorcycle of the present invention allows the rider to place his feet more easily on the ground when stopped, due to the forward-narrowing design of the upper tubes. Attached Figure Description

[0023] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the accompanying drawings, wherein:

[0024] Figure 1 It is a top view illustrating the frame assembly of an existing motorcycle;

[0025] Figure 2 This is a side view illustrating an embodiment of the straddle-mounted motorcycle of the present invention;

[0026] Figure 3 This is a side view illustrating a frame unit, a controller, a power motor, two battery tanks, and a riding unit of this embodiment;

[0027] Figure 4 It is a top view illustrating the shape of the two upper side tubes of the frame unit;

[0028] Figure 5 It is similar Figure 4 A top view illustrating the controller's mounting on the chassis unit;

[0029] Figure 6 It is a top view illustrating a housing enclosing the frame unit; and

[0030] Figure 7 This is a front view, illustrating the fit. Figure 6 This embodiment demonstrates its effectiveness in reducing wind resistance during driving.

[0031] List of reference numerals

[0032] 2···· Chassis Unit

[0033] 200··· Installation space

[0034] 21···Head tube

[0035] 22···Longitudinal pipe

[0036] 23··· Front Horizontal Tube

[0037] 24··· Lower side tube

[0038] 25··· Upper side tube

[0039] 26··· Rear horizontal tube

[0040] 3···· Controller

[0041] 4···· Power Motor

[0042] 5. Battery compartment

[0043] 51··· Slot

[0044] 6···· Passenger Unit

[0045] 61··· Container

[0046] 62··· Seat Cushion

[0047] 8. Foot pedals

[0048] 9. Outer shell. Detailed Implementation

[0049] See Figure 2 and Figure 3 This is an embodiment of the straddle-type motorcycle of the present invention. This embodiment includes a frame unit 2, a controller 3 mounted on the frame unit 2, a power motor 4 mounted on the frame unit 2 and located relatively behind the controller 3, a battery compartment 5 disposed on the power motor 4 and defining two slots 51 spaced apart in a left-right direction, and a riding unit 6 disposed on the battery compartment 5. In this embodiment, a shell 9 covering the outer side generally surrounds the outer side of the frame unit 2 and extends according to the shape of the frame unit 2. Specifically, the riding unit 6 includes a housing 61 connected to the battery compartment 5 and a seat 62 connected to the housing 61 and facing upwards for seating.

[0050] See also Figure 3 and Figure 4 The frame unit 2 is generally constructed by welding together multiple metal tubes, and includes a head tube 21 for connecting to the steering module, a longitudinal tube 22 connected to the head tube 21 and extending downward, a front transverse tube 23 connected to the lower end of the longitudinal tube 22 and extending laterally, two lower side tubes 24 extending horizontally rearward parallel to each other from the front transverse tubes 23, two upper side tubes 25 connected to the longitudinal tubes 22 and extending rearward with gradually increasing spacing between them, and a rear transverse tube 26 connected to the rear end of the lower side tubes 24 and respectively disposed on the front and rear sides of the mounting space 200 with the front transverse tubes 23. The lower side tubes 24 and the upper side tubes 25 together define a mounting space 200 that is narrower at the front and wider at the rear, for the controller 3 to be installed.

[0051] It is worth noting that the upper tubes 25 are designed to gradually narrow from the outside towards the front, until they bend inward to connect with the longitudinal tube 22. Therefore, even though the portion of the upper tubes 25 closer to the center must be wider to accommodate the necessary installation of the power motor 4 and the configuration of the two slots 51 in the battery compartment 5, their gradually narrowing design still provides stronger structural rigidity compared to a configuration with equal width at the front and rear. In terms of external forces that may be encountered during actual use, the upper tubes 25 can relatively reduce the torsion or torque at the connection point when subjected to downward pedaling force, and external forces in the front-rear direction can also be relatively dispersed laterally, effectively preventing stress concentration, optimizing the durability of the frame unit 2 during use, and thereby extending its service life.

[0052] See Figure 3 and Figure 5 The longitudinal projection range of the controller 3 partially overlaps with one of the lower side tubes 24. Furthermore, the transverse projection range of the controller 3 partially overlaps with portions of the front horizontal tube 23 and the rear horizontal tube 26. As the controller 3 serves as the main control hub in this embodiment, its left and right sides are protected by the upper side tubes 25 and the lower side tubes 24, while its front and rear sides are protected by the front horizontal tube 23 and the rear horizontal tube 26, respectively. This ensures stable longitudinal support for the controller 3 and protects it from impacts in all directions, thereby maximizing the normal operation of the overall control mechanism of this embodiment.

[0053] See Figure 6 and Figure 7 and cooperate Figure 5The outer shell 9, in conjunction with the extended shape of the upper side tubes 25, also presents a shape where the width gradually increases from front to back, thereby forming a low-drag pattern that breaks the wind at the front and guides the airflow backward. By effectively reducing the wind resistance experienced during riding in this embodiment, fuel consumption and related riding performance can naturally be improved simultaneously. Furthermore, for the rider in this embodiment, when riding on the riding unit 6, the width of the footrest 8 mounted on the upper side tubes 25 is also narrowed due to the forward-narrowing design of the upper side tubes 25. Therefore, even though this embodiment selects a battery compartment 5 with two slots 51 for battery insertion to meet power requirements, it is easier for the rider's feet to touch the ground when stopping, given the relatively narrow lateral body configuration.

[0054] In summary, this embodiment of the straddle-type motorcycle of the present invention, through the design of the upper side tubes 25 of the frame unit 2, optimizes the overall rigidity of the frame unit 2, thereby providing better protection for the controller 3. Simultaneously, when the housing 9 can be extended to accommodate the frame unit 2, it achieves the effect of reducing wind resistance and improving riding performance. Therefore, the objectives of the present invention are indeed achieved.

[0055] The above description is merely an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention shall still fall within the scope of the patent of the present invention.

Claims

1. A straddle-type motorcycle, characterized in that, It includes a frame unit, the frame unit comprising: One end is a pipe; A longitudinal tube, connected to the head tube and extending downward; A front horizontal tube is connected to the lower end of the longitudinal tube and extends laterally; Two lower side tubes extend rearward parallel to each other from the front horizontal tube; and Two upper side tubes are connected to the longitudinal tube and extend backward with increasing spacing between them.

2. The motorcycle according to claim 1, characterized in that, The lower tube and the upper tube together define an installation space that is narrower at the front and wider at the rear. The straddle motorcycle also includes a controller disposed in the installation space.

3. The motorcycle according to claim 2, characterized in that, The frame unit also includes a rear cross tube connected to the rear end of the lower side tube and disposed on the front and rear sides of the mounting space, respectively, as the front cross tube.

4. The straddle motorcycle according to claim 2 or 3, characterized in that, The longitudinal projection range of the controller overlaps with at least one of the lower tubes in at least a portion.

5. The motorcycle according to claim 3, characterized in that, The projection range of the controller along the lateral direction has at least a portion overlapping with at least a portion of the front or rear horizontal tube.

6. The motorcycle according to claim 1, characterized in that, The lower tube of the frame unit extends horizontally.

7. The motorcycle according to claim 2, characterized in that, It also includes a power motor located at the rear of the mounting space.

8. The motorcycle according to claim 7, characterized in that, It also includes at least one battery compartment disposed above the power motor.

9. The straddle-type motorcycle according to claim 8, characterized in that, It also includes a riding unit disposed above the at least one battery compartment.

10. The motorcycle according to claim 1, characterized in that, It also includes a power motor disposed behind the upper tube of the frame unit, and a battery compartment disposed above the power motor and defining a plurality of slots spaced apart in the left-right direction.

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