Novel two-wheeled vehicle

Abstract

The utility model relates to a two-wheeled vehicle which comprises a power device, a frame, a bottom fork, a bottom fork shaft, a rear wheel, a first output wheel and a second output wheel, the rear wheel is arranged on the rear section of the bottom fork, the second output wheel is connected to a hub of the rear wheel, and power is transmitted between the first output wheel and the second output wheel through a chain or a belt; the power device comprises a power output shaft and a box body which are arranged inside, the power output shaft is a hollow shaft, the hollow shaft is provided with an extending section extending out of the box body, and the first output wheel is arranged on the extending section of the box body of the hollow shaft. The bottom fork shaft penetrates through the bottom fork front section and the hollow shaft to support the power device and the bottom fork front section on the frame, according to the novel two-wheeled vehicle adopting the technical scheme, it is firstly guaranteed that the tension degree of a transmission chain or a belt is kept consistent, and compared with virtual coaxiality, the assembling difficulty is reduced, and the strength is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to two -wheeled vehicle, including two -wheeled motorcycle and electric car technical field, concretely relates to a novel two -wheeled vehicle. BACKGROUND

[0002] The existing two-wheeled vehicle includes a power device, a frame, a flat fork, a flat fork shaft, a rear wheel, a first output wheel and a second output wheel. The rear wheel is arranged at the rear section of the flat fork. The second output wheel is connected to the hub of the rear wheel. The power device includes a power output shaft and a box body. The power device mainly adopts a centrally arranged motor or engine. The first output wheel on the power output shaft directly drives the second output wheel on the rear hub wheel supported and fixed by the rear section of the flat fork through a transmission chain or belt. However, since the power output shaft and the flat fork shaft are not on the same straight line, the distance between the second output wheel and the first output wheel changes when the flat fork swings, which causes the tension of the transmission chain or belt to change. The transmission chain or belt interferes with the flat fork, and even the chain or belt is pulled off or the chain or belt is loose and falls off. This situation often occurs, especially when the cross-country vehicle does extreme sports and the flat fork swings greatly.

[0003] To solve the above technical problems, a patent with the name of "a virtual coaxial transmission mechanism" and the Chinese publication number CN214690028U discloses a coaxial transmission system suitable for rear-wheel drive two-wheeled motorcycles or electric vehicles, such as Figure 1As shown, the two-wheeled motorcycle or electric vehicle comprises a power device 2 and a frame, the frame comprises a left support frame and a right support frame, the power device is provided with a power output shaft 3, one end of the power output shaft 3 is provided with a first output wheel 4, the other end is provided with a second input wheel 5, the first output wheel 4 and the second input wheel 5 rotate coaxially, further comprising a rear wheel hub 7, one end of the rear wheel hub 7 is fixed with a second output wheel 8, the second input wheel 5 and the second output wheel 8 are driven by a belt 6 or a chain, the two-wheeled motorcycle or electric vehicle further comprises split left and right forks, left and right fork shafts, the left fork shaft 12 connects the left fork and the left support frame, the right fork shaft 13 connects the right fork and the right support frame, the right fork shaft, the left fork shaft and the drive shaft are in the same axial position; the above technical scheme adopts a virtual coaxial structure, that is, the left fork shaft, the drive shaft and the right fork shaft are virtually in the same straight line, solving the technical problem of fixed distance between the first output wheel on the power output shaft and the second output wheel on the rear wheel hub wheel supported by the fork, especially when the cross-country vehicle is doing extreme sports, when the swing range of the fork is large, solving the defect that the tension of the transmission chain or belt changes due to the change of the distance between the first output wheel and the second output wheel, the transmission chain or belt interferes with the fork, and even the chain or belt is pulled off or the chain or belt is loose and falls off, but due to the virtual coaxial structure, the structure is divided into three sections, which is relatively difficult to assemble and has high manufacturing precision, at the same time, the stress is concentrated at the fork shaft, which is easy to break. Utility model content

[0004] The utility model provides to the defect that the prior art exists, proposes a novel two-wheeled vehicle, can solve the defect that the power output shaft and the fork shaft are not coaxial in the prior art, thereby ensuring that the tension of the transmission chain or belt remains stable regardless of the rotation of the fork, and can also connect the frame, the fork and the power device together through the fork shaft, reducing the assembly difficulty and improving the strength.

[0005] The technical scheme is: a novel two-wheeled vehicle, comprising a power device, a frame, a fork, a fork shaft, a rear wheel, a first output wheel and a second output wheel, the rear wheel is arranged at the rear section of the fork, the second output wheel is connected to the hub of the rear wheel, and the first output wheel and the second output wheel transmit power through a chain or a belt; the power device comprises a power output shaft and a box body arranged inside, the power output shaft is a hollow shaft, the hollow shaft has a box body extension segment extending out of the box body, the first output wheel is arranged on the box body extension segment of the hollow shaft, and the fork shaft passes through the front section of the fork and the hollow shaft to support the power device and the front section of the fork on the frame.

[0006] Adopt the technical scheme, because the power output shaft is hollow shaft, the fork shaft passes through the fork front section and the hollow shaft, and the power device and the fork front section are supported on the frame, first, the distance between the fork shaft and the second output wheel is kept at a predetermined distance regardless of the rotation of the fork, thereby ensuring that the tension of the transmission chain or belt remains consistent, and second, compared with the virtual coaxial, the assembly difficulty is reduced, and the strength is improved.

[0007] Further limited, the hollow shaft at least includes a front half shaft and a rear half shaft, the front half shaft and the rear half shaft are fixedly connected, wherein the box body extension section is an outer section of the rear half shaft.

[0008] Adopting two half shafts is more convenient to manufacture than adopting a whole shaft, and the cost is relatively lower.

[0009] Further limited, the front half shaft and the rear half shaft are spline shafts, the front half shaft and the rear half shaft are connected through splines, and the rear half shaft and the first output wheel are connected through splines.

[0010] In addition, in order to better support, ensure rotation, coaxiality and reduce transverse jumping, hollow shaft support bearings are arranged in the box body and the edge, a fork bushing is sleeved in the hollow shaft, the inner diameter of the fork bushing and the outer diameter of the fork shaft are matched with each other, the front sections of the left fork and the right fork are provided with fork bearings, and the fork shaft is matched and passes through the fork bearings.

[0011] Further limited to the structure of the frame and the structure of the fork, the frame includes a left support frame and a right support frame, the first output wheels are arranged between the left support frame and the right support frame, the first output wheels and the second output wheels are on the same plane, the fork includes a left fork and a right fork, and the fork shaft sequentially passes through the left support frame, the left fork, the hollow shaft, the right fork and the right support frame.

[0012] Further limited, dustproof decorative covers are arranged outside the left support frame and the right support frame where the fork shaft is installed, further limited, the left fork and the right fork are divided into a main fork and an auxiliary fork, the main fork is in a '^' shaped structure, the auxiliary fork is in a rod structure, and the auxiliary fork and the main fork form a triangular structure.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] Since the flat fork shaft and the power output shaft are at the same axial position, no matter how the flat fork swings, the distance between the flat fork shaft and the second output wheel on the rear wheel hub will not change, that is, the tension of the transmission chain or belt will not change, and the transmission chain or belt will not interfere with the flat fork, prolonging the service life of the transmission chain and belt, and at the same time, the tension of the transmission chain and belt does not need to be reduced in advance to adapt to the change of the tension, causing additional noise and transmission vibration.

[0015] The utility model discloses simple structure, and the component cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the schematic diagram of the patent with the present disclosure number CN214690028U;

[0017] Figure 2 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative characteristics, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with the drawings and specific embodiments. EMBODIMENT

[0019] As Figure 2As shown, a new two-wheeled vehicle includes a power device, a frame, a flat fork, a flat fork shaft 4a, a rear wheel (not shown in the figure), a first output wheel 6a and a second output wheel, the power device is a power source with a transmission mechanism, the power device includes a box body 12a, an embedded power source shaft 10a, a transition shaft 20a and a power output shaft, the power source shaft 10a transmits power to the transition shaft 20a through a gear pair, the transition shaft 20a transmits power to the power output shaft through a gear pair, realizing the change of variable gear torque, the first output wheel 6a and the second output wheel transmit power through a chain or a belt; the second output wheel is connected to the hub of the rear wheel, the frame includes a left support frame 21a and a right support frame 22a, the flat fork includes a left flat fork 31a and a right flat fork 32a, the rear wheel is arranged between the inner profiles of the rear sections of the left flat fork 31a and the right flat fork 32a, the first output wheel 6a is arranged between the left support frame 21a and the right support frame 22a, the first output wheel 6a and the second output wheel are on the same plane, wherein the power output shaft is a hollow shaft 30a, the hollow shaft 30a has a box body extension segment, the hollow shaft 30a includes a front half shaft hollow shaft 301a and a rear half shaft hollow shaft 302a, the front half shaft hollow shaft 301a and the rear half shaft hollow shaft 302a are fixedly connected, wherein the box body extension segment is an outer segment of the rear half shaft hollow shaft 302a, the first output wheel 6a is arranged on the box body extension segment of the rear half shaft hollow shaft 302a, the flat fork shaft 4a sequentially passes through the left support frame 21a, the left flat fork 31a, the hollow shaft 30a, the right flat fork 32a and the right support frame 12a to support the power device and the flat fork front section on the frame, the front half shaft hollow shaft 301a and the rear half shaft hollow shaft 302a are spline shafts, the front half shaft hollow shaft 301a and the rear half shaft hollow shaft 302a are connected by spline, and the rear half shaft hollow shaft 302a and the first output wheel 6a are connected by spline.

[0020] In order to ensure the strength of the hollow shaft 30a, a flat fork bushing 11b is arranged in the hollow shaft, and the inner diameter of the flat fork bushing 11b and the outer diameter of the flat fork shaft 4a match each other.

[0021] In order to ensure the support and rotation of the front half shaft 111 and the rear half shaft 112, hollow shaft support bearings 13a are arranged inside and on the edge of the box body 12.

[0022] In order to ensure the support and rotation of the flat fork shaft 4a, flat fork bearings 41a are arranged at the front sections of the left flat fork and the right flat fork, and the flat fork shaft 4a matches the flat fork bearings 41a.

[0023] In order to ensure the external dustproof decorative cover of the hollow shaft at the flat fork shaft mounting positions of the left support frame and the right support frame.

[0024] The new two-wheeled vehicle has the hollow shaft 30a as the power output shaft of the power device, the first output wheel 6a is arranged on the hollow shaft 30a, and the flat axle shaft 4a is inserted into the hollow shaft 30a in a clearance fit, so that the hollow shaft 30a and the flat axle shaft 4a have the same coaxial line, thereby ensuring that the distance between the first output wheel 6a and the second output wheel remains the designed distance regardless of the rotation of the flat axle, thereby ensuring that the tension of the transmission chain or belt remains consistent, avoiding the defects that the distance between the first output wheel and the second output wheel changes in the prior art, the tension of the transmission chain or belt changes, the transmission chain or belt interferes with the flat axle, and even the chain or belt is pulled off or the chain or belt is loose and falls off; in addition, the structure in which the flat axle shaft passes through the left support frame 21a, the left flat axle 31a, the hollow shaft 30a, the right flat axle 32a and the right support frame 22a in sequence is relatively coaxial, which reduces the assembly difficulty and improves the strength.

[0025] The technical scheme of the utility model has simple structure and small production difficulty.

[0026] The description of the specific embodiments is only used to help understand the method and the core idea of the utility model, and it should be pointed out that the above description is only the preferred specific implementation mode of the utility model, and for the ordinary skilled in the art, the utility model can be improved and modified in several ways without departing from the principle of the utility model, and these improvements and modifications will also fall within the protection scope of the utility model claims.

Claims

1. A new type of two-wheeled vehicle, comprising a power device, a frame, a flat fork, a flat fork shaft, a rear wheel, a first output wheel and a second output wheel, the rear wheel is arranged at the rear section of the flat fork, the second output wheel is connected to the hub of the rear wheel, and the first output wheel and the second output wheel transmit power through a chain or a belt; the power device comprises a built-in power output shaft and a box body, characterized in that: The power output shaft is a hollow shaft with a box body extension segment, the first output wheel is arranged on the box body extension segment of the hollow shaft, and the flat fork shaft passes through the flat fork front segment and the hollow shaft to support the power device and the flat fork front segment on the frame.

2. Scooter according to claim 1, characterized in that: The hollow shaft includes a front half shaft and a rear half shaft which are fixedly connected, and the box body extension segment is an outer segment of the rear half shaft.

3. Scooter according to claim 2, characterized in that: The front half shaft and the rear half shaft are spline shafts, and the rear half shaft and the first output wheel are connected through splines.

4. Scooter according to claim 1, characterized in that: The hollow shaft support bearings are arranged on the inside and the edge of the box body.

5. The novel two-wheeled vehicle as claimed in claim 1, wherein: The flat fork bushing is sleeved in the hollow shaft, and the inner diameter of the flat fork bushing and the outer diameter of the flat fork shaft are matched with each other.

6. The novel two-wheeled vehicle of claim 1, characterized by: The frame includes a left support frame and a right support frame, the first output wheel is arranged between the left support frame and the right support frame, and the first output wheel and the second output wheel are in the same plane.

7. Scooter according to claim 6, characterized in that: The flat fork includes a left flat fork and a right flat fork, and the flat fork shaft sequentially passes through the left support frame, the left flat fork, the hollow shaft, the right flat fork and the right support frame.

8. Scooter according to claim 7, characterized in that: The front segment of the left flat fork and the front segment of the right flat fork are provided with flat fork bearings, and the flat fork shaft is matched to pass through the flat fork bearings.

9. Scooter according to claim 6, characterized in that: Dustproof decorative covers are arranged outside the left support frame and the right support frame at the flat fork shaft mounting positions.

Images