Tricycle direction control mechanism

Abstract

The utility model discloses a tricycle direction control mechanism which solves the problem that an existing steering wheel type tricycle is relatively poor in stability in the using process, and adopts the technical scheme that the tricycle direction control mechanism is used for achieving steering rotation of a front fork of the tricycle and comprises a steering wheel and a transmission shaft which are in transmission connection. The power output shaft is movably supported on the connecting seat, the power output shaft is in transmission connection with the transmission shaft, the power output shaft is in transmission connection with the pull rod, and the pull rod is in transmission connection with the front fork.

Description

Technical Field

[0001] The utility model relates to a direction control mechanism in a vehicle, in particular to a direction control mechanism in a tricycle. Background Art

[0002] The tricycle is used to carry people and goods, providing convenience for people's travel. The structure of the tricycle includes three wheels arranged on the lower side of the chassis, and the three wheels are arranged in a triangle, wherein the front wheel is located at the front side, and the other two are arranged in parallel at the rear side. In the tricycle, a steering device is usually provided at the front side position, and the steering device corresponds to the front wheel arrangement, and the steering of the front wheel is realized by manipulating the direction control mechanism, thereby realizing the lane change and steering of the tricycle as a whole. The main structure of the direction control mechanism in the existing tricycle is a rod-type faucet, and the faucet is directly fixed to the upper end of the faucet shaft, and the steering of the tricycle is realized by pulling the faucet. The common steering device of the existing tricycle has a relatively simple structure, but the grade is not high. Moreover, during the operation process, turning is relatively urgent. Combined with the low stability of the tricycle itself, the stability of the tricycle equipped with such a steering device during driving is relatively low, so there will be certain safety hazards during driving.

[0003] Steering wheel-type direction control mechanisms are also used on tricycles. The steering wheel is directly connected to the handlebar shaft, and the steering wheel's rotation angle is directly and completely reflected on the handlebar shaft. The operating experience of this direction control mechanism is relatively poor, and the driving stability in actual application is relatively not good. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a direction control mechanism for a tricycle, the control mechanism has relatively high maneuverability and can effectively improve the driving safety of the tricycle.

[0005] In order to solve the technical problems, the technical solution of the utility model is: a three-wheeled vehicle direction control mechanism, used to realize the steering rotation of the front fork of the three-wheeled vehicle, including a steering wheel and a transmission shaft that are transmission-connected, and is characterized in that it also includes a fixedly arranged connecting seat, a power output shaft is movably supported on the connecting seat, the power output shaft is transmission-connected to the transmission shaft, the power output shaft is transmission-connected to the pull rod, and the pull rod is transmission-connected to the front fork.

[0006] The lower end of the front fork of the tricycle is rotatably connected to the front wheel, and the rotation of the steering wheel provides power for the rotation of the front fork to achieve the steering of the tricycle as a whole. The steering wheel and the front fork are provided with a plurality of specific structures to achieve power transmission, and corresponding limit structures can be provided on these structures to achieve the limit when the steering wheel is rotated, such as limiting the rotation angle of the steering wheel, or limiting the number of rotations of the steering wheel.

[0007] Furthermore, the pull rod is arranged in parallel with the power output shaft, which can effectively reduce the volume of these intermediate transmission mechanisms and is conducive to the compactness of the overall structure.

[0008] Furthermore, the coupling seat is a hollow structure, the power output shaft is movably arranged in the coupling seat, and the transmission shaft and the power output shaft are transmission-connected inside the coupling seat. The power output shaft and the transmission shaft are transmission-connected in the coupling seat, and the transmission connection between them is stable, which is conducive to the stable transmission of power. The transmission shaft and the power output shaft can be connected through a worm gear structure, or through a gear rack or a bevel gear combined with a threaded structure to achieve transmission.

[0009] Furthermore, the power output shaft extends outward from the coupling seat, and a protective sleeve is sleeved on the outer periphery of the extended end side of the power output shaft, and the wall of the protective sleeve forms a corrugated structure. The provision of the protective sleeve can effectively prevent external dust from entering the power output shaft, and the provision of the corrugated structure can well adapt to the change in the length of the extended end side of the power output shaft.

[0010] Furthermore, the coupling seat is provided with a protruding coupling claw, which is used to fix the coupling seat. The arrangement of the coupling claw can facilitate the connection and fixation of the coupling seat, and facilitate the stable transmission between the transmission shaft and the power output shaft.

[0011] Furthermore, the front fork is connected to the lower end of the faucet shaft, a swing arm is fixedly connected to the upper end of the faucet shaft, and the pull rod is transmission-connected to the outer end of the swing arm. This structural arrangement facilitates the pull rod to provide driving force for the rotation of the faucet shaft, and facilitates the faucet shaft to respond to the rotation of the steering wheel.

[0012] Furthermore, a connecting piece for realizing transmission connection is provided between the ends of the pull rod and the power output shaft that are close to each other, and the connecting piece is in a "convex" shape, and the small end of the connecting piece is inserted into the outer end of the power output shaft with a gap, and the end of the pull rod is fixedly connected to the large end of the connecting piece. By setting the "convex" shaped connecting piece, it is convenient to realize the transmission connection between the power output shaft and the pull rod. The pull rod and the large end of the connecting piece are generally fixed by welding.

[0013] Furthermore, the transmission shaft is a multi-section flexible shaft structure, wherein both ends of the middle section are respectively connected with a universal cross-joint. The setting of the flexible shaft structure can effectively ensure the smoothness of transmission, and facilitate the smooth transmission of the torque on the steering wheel to the faucet shaft.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the power output shaft and the pull rod are arranged between the steering wheel and the front fork, which can effectively decelerate the rotation of the steering wheel, so that the force on the steering wheel is small during steering, and the rotation of the steering wheel is light and labor-saving. Moreover, the rotation of the front fork is gentle, so that the steering stability of the tricycle is good, which is beneficial to the safety of driving. By arranging these transmission structures, the space on the front side of the tricycle can be effectively utilized, and the arrangement of the direction control mechanism can be conveniently realized. By fixing the connecting seat, support can be provided for these transmission mechanisms, so that the working stability of these transmission mechanisms can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of the direction control mechanism of the tricycle.

[0016] Figure 2 yes Figure 1 Exploded diagram.

[0017] Figure 3 It is an exploded view of the direction control mechanism of the tricycle in another direction.

[0018] In the figure, 1, steering wheel; 2, support plate; 3, transmission shaft; 4, faucet shaft; 5, front fork; 6, connecting seat; 61, connecting claw; 7, protective cover; 8, power output shaft; 9, connecting piece; 10, pull rod; 11, swing arm. DETAILED DESCRIPTION

[0019] In conjunction with the drawings of the specification, the direction control mechanism of the tricycle is provided on the front side of the tricycle, and is used to realize the steering rotation of the front fork 5 of the tricycle, thereby realizing the steering of the front wheel of the tricycle, and finally realizing the steering forward movement of the tricycle.

[0020] The control mechanism structure includes a steering wheel 1 and a transmission shaft 3 that are transmission-connected. The steering wheel 1 extends into the driving space on the front side of the tricycle for the driver to hold and turn. As shown in the figure, the steering wheel 1 is connected to a sheet-like support plate 2, and the support plate 2 is connected to the frame, and the support plate 2 is used to provide support for the steering wheel 1. The transmission shaft 3 transmits the torque generated by the steering wheel 1 to the front fork 5 through an intermediate transmission mechanism. In order to improve the smoothness of the transmission, the transmission shaft 3 is a multi-section flexible shaft structure, in which the two ends of the middle section are respectively connected with universal cross-joints. In addition, the structural setting of this flexible shaft can also adapt well to the installation position of the steering wheel 1, and the installation position of the steering wheel 1 has low requirements.

[0021] The intermediate transmission mechanism is supported by the connecting seat 6, which is fixedly connected to the frame of the tricycle, and the connecting seat 6 has good stability. The power output shaft 8 is movably supported on the connecting seat 6, and the power output shaft 8 is transmission-connected with the transmission shaft 3, and the power output shaft 8 is transmission-connected with the pull rod 10, and the pull rod 10 is transmission-connected with the front fork 5. In order to improve the space utilization rate, the pull rod 10 is arranged in parallel with the power output shaft 8, and the positions of the two in the width direction of the tricycle are basically flush. The front fork 5 is connected and fixed to the lower end of the faucet shaft 4, and a swing arm 11 is provided on the upper end side of the faucet shaft 4. The inner end of the swing arm 11 is sleeved on the faucet shaft 4 and is fixedly connected to the faucet shaft 4 through a locking nut. The pull rod 10 is hinged to the outer end of the swing arm 11 to achieve transmission connection.

[0022] The coupling seat 6 is provided with three extended coupling claws 61, and the outer ends of the coupling claws 61 are provided with transparent coupling holes, and the coupling bolts pass through the coupling holes and are connected and fixed with the corresponding supporting structure on the frame. The coupling seat 6 is a hollow tubular body, and the power output shaft 8 is movably inserted in the coupling seat 6, and the transmission shaft 3 and the power output shaft 8 are connected to each other in a transmission manner inside the coupling seat 6. It can be that a plurality of toothed protrusions are provided on the outer circumference of the power output shaft 8, so that a rack structure is formed on the power output shaft 8, and a gear is rotatably provided in the coupling seat 6, and the gear is connected to the inner end of the transmission shaft 3, and the gear is meshed with these toothed protrusions, so that the power output shaft 8 can move axially. It can also be that a worm pattern is formed on the outer circumference of the power output shaft 8, and a worm wheel provided on the outside is meshed with it, so that the worm wheel drives the power output shaft 8 to move axially under the drive of the transmission shaft 3. The axial movement of the power output shaft 8 is realized by a worm gear or a gear rack structure, and the rotation angle of the steering wheel 1 can be limited by setting the length of the worm pattern or the length of the toothed protrusion. The direction control mechanism can control the wheel to rotate within the range of 71°±2°. Specifically, on the steering wheel 1, the steering wheel 1 can rotate one circle to the left or right from the initial position.

[0023] The power output shaft 8 extends outward from the connecting seat 6 , and a protective sleeve 7 is sleeved on the outer periphery of the extended end of the power output shaft 8 . The protective sleeve 7 is generally made of rubber material, and the wall of the protective sleeve 7 forms a corrugated structure.

[0024] In order to facilitate the connection and fixation, a connecting piece 9 for realizing transmission connection is provided between the ends of the pull rod 10 and the power output shaft 8 that are close to each other. The connecting piece 9 is in a "convex" shape, and the small end of the connecting piece 9 is inserted into the outer end of the power output shaft 8 with a gap. The end of the pull rod 10 is welded and fixed to the outer end surface of the large end of the connecting piece 9.

Claims

1. A tricycle direction control mechanism, used to realize the steering rotation of the front fork of the tricycle, comprising a steering wheel and a transmission shaft connected in a transmission manner, characterized in that: It also includes a fixed connecting seat, on which a power output shaft is movably supported, the power output shaft is drivingly connected to the transmission shaft, the power output shaft is drivingly connected to a pull rod, and the pull rod is drivingly connected to the front fork.

2. The tricycle direction control mechanism according to claim 1, characterized in that: The pull rod is arranged in parallel with the power output shaft.

3. The tricycle direction control mechanism according to claim 1, characterized in that: The connecting seat is a hollow structure, the power output shaft is movably arranged in the connecting seat, and the transmission shaft and the power output shaft are connected in transmission inside the connecting seat.

4. The tricycle direction control mechanism according to claim 3, characterized in that: The power output shaft extends outward from the connecting seat, and a protective sleeve is sleeved on the outer periphery of the extending end of the power output shaft, and the wall of the protective sleeve forms a corrugated structure.

5. The tricycle direction control mechanism according to claim 1, characterized in that: The connecting seat is provided with a protruding connecting claw, and the connecting claw is used to fix the connecting seat.

6. The tricycle direction control mechanism according to any one of claims 1 to 5, characterized in that: The front fork is connected to the lower end of the faucet shaft, a protruding swing arm is fixedly connected to the upper end side of the faucet shaft, and the pull rod is transmission-connected to the outer end of the swing arm.

7. The direction control mechanism for a tricycle according to any one of claims 1 to 5, characterized in that: A connecting piece for realizing transmission connection is arranged between the ends of the pull rod and the power output shaft which are close to each other. The connecting piece is in a "convex" shape. The small end of the connecting piece is inserted into the outer end of the power output shaft with clearance, and the end of the pull rod is fixedly connected to the large end of the connecting piece.

8. The tricycle direction control mechanism according to any one of claims 1 to 5, characterized in that: The transmission shaft is a multi-section flexible shaft structure, wherein both ends of the middle section are respectively connected with universal cross-joints.

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