Steering wheel type tricycle steering transmission mechanism

Abstract

The utility model discloses a steering transmission mechanism of a tricycle, which solves the problem that the existing steering wheel type tricycle is relatively poor in stability during use, and adopts the technical scheme that the steering transmission mechanism of the steering wheel type tricycle is arranged between a steering wheel and a handlebar shaft and comprises a transmission shaft in transmission connection with the steering wheel, the device comprises a transmission shaft and a power output shaft in transmission connection with the transmission shaft, and is characterized by further comprising a fixedly arranged connecting seat, a transmission cavity is formed in the connecting seat, the inner end of the power output shaft is movably inserted into the transmission cavity, and the outer end of the power output shaft extends out of the outer side of the connecting seat and is used for being in transmission connection with a faucet shaft; the transmission shaft extends into the transmission cavity, and transmission structures which are in transmission fit with each other are arranged between the power output shaft and the transmission shaft in the transmission cavity; the limiting structure is used for limiting the axial movement distance of the power output shaft.

Description

Technical Field

[0001] The utility model relates to a transmission mechanism, in particular to a transmission mechanism for realizing steering power transmission in a steering wheel type 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 steering transmission mechanism for a steering wheel type tricycle, which is convenient to set up and has good transmission stability.

[0005] In order to solve the technical problems, the technical solution of the utility model is: a steering transmission mechanism of a steering wheel type tricycle, arranged between the steering wheel and the faucet shaft, including a transmission shaft connected to the steering wheel transmission, and a power output shaft connected to the transmission shaft transmission, characterized in that it also includes a fixed connecting seat, a transmission cavity is provided in the connecting seat, the inner end of the power output shaft is movably inserted in the transmission cavity, and the outer end of the power output shaft extends to the outside of the connecting seat, and the outer end is used for transmission connection with the faucet shaft; the transmission shaft extends into the transmission cavity, and in the transmission cavity, a transmission structure for mutual transmission cooperation is provided between the power output shaft and the transmission shaft; the limiting structure is used to limit the axial movement distance of the power output shaft.

[0006] The steering wheel is not directly connected to the faucet shaft, but the power transmission between the steering wheel and the faucet shaft is realized through the transmission mechanism. The limit structure can be set at any position of the transmission mechanism, as long as it can limit the movement range of any movable part in the transmission mechanism. The limit structure can limit the rotation angle of the steering wheel, and then limit the steering angle of the tricycle. The connecting seat is generally connected to the frame to achieve the fixation of the connecting seat.

[0007] Furthermore, a limiting hole is provided on the coupling seat, and a leaning block is provided at the position of the limiting hole in the transmission cavity, the leaning block abuts against the power output shaft, and the leaning block and the transmission structure are arranged on opposite sides of the power output shaft. The leaning block is generally installed in the limiting hole, and the leaning block against the power output shaft can ensure the stability of the meshing between the worm gear rack pair or the gear rack pair, which is beneficial to the coordination between the transmission structures and the stability of the transmission.

[0008] Furthermore, a plug is provided at the position of the limiting hole, and the plug is used to press the leaning block toward the power output shaft. The leaning block can be an elastic member, and can be retracted from the position of the limiting hole and inserted into the transmission cavity. By providing a plug, the leaning block can be limited by the plug, and the size of the leaning block can be relatively small, which facilitates the assembly of the leaning block, and the leaning block has good limiting stability on the power output shaft. The provision of the plug also facilitates the injection of lubricating oil into the transmission cavity, thereby effectively improving the smoothness of movement of the power output shaft.

[0009] Furthermore, a column ring is provided on the connection seat at the periphery of the limiting hole, and the sealing plug is arranged in the column ring. The arrangement of the column ring facilitates the assembly of the sealing plug, and makes the installation stability of the sealing plug good.

[0010] Furthermore, a plurality of coupling claws are integrally formed on the outer peripheral surface of the coupling seat, and the coupling claws extend outward from the coupling seat. The coupling claws are used to connect with other fixing components, and the coupling seat can be fixed conveniently by setting the coupling claws, which has a simple structure and is easy to operate.

[0011] Furthermore, the transmission structure includes a plurality of tooth-like protrusions formed on the power output shaft, and the tooth-like protrusions are arranged in a row in the axial direction of the power output shaft; a worm or gear for meshing with the tooth-like protrusions is provided on the transmission shaft; and the arrangement size of the tooth-like protrusions in the axial direction of the power output shaft realizes the limitation of the axial movement distance of the power output shaft. This transmission structure is simple, easy to assemble, and the transmission stability is guaranteed.

[0012] Furthermore, the power output shaft is a split structure, including a screw sleeve and a screw connected by threads, and the transmission structure includes bevel gears respectively sleeved on the power output shaft and the transmission shaft, and the two bevel gears are meshed with each other. This power output shaft has a simple structure and good transmission stability.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the transmission mechanism is used to transmit the power between the steering wheel and the faucet shaft, and the steering wheel is not directly connected to the faucet shaft, so that the stability of the tricycle during steering is guaranteed. The connecting seat is fixedly arranged, and the connecting seat provides support for the transmission mechanism, so that the transmission mechanism has good position stability, which is convenient for the stable transmission of the transmission mechanism. A transmission cavity is arranged in the connecting seat, and the transmission structure is located in the transmission cavity, which is convenient for injecting the lubrication cavity and grease into the transmission cavity, so that the transmission smoothness of the transmission structure can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a reference diagram of the usage status of this transmission structure.

[0015] Figure 2 yes Figure 1 Exploded diagram.

[0016] Figure 3 is Figure 2 On this basis, a further exploded structural diagram is made.

[0017] In the figure, 1. steering wheel; 2. support plate; 3. transmission shaft; 4. tappet shaft; 5. front fork; 6. connecting seat; 61. connecting claw; 62. ring column; 7. protective cover; 8. power output shaft; 9. connecting piece; 10. pull rod; 11. swing arm; 12. leaning block; 13. plug. DETAILED DESCRIPTION

[0018] In conjunction with the drawings of the specification, the steering transmission mechanism of the steering wheel type tricycle is arranged on the tricycle to realize torque transmission when the tricycle is turned, and is used to transmit the torque on the steering wheel 1 to the tricycle's leading shaft 4 to realize the rotation of the tricycle. The tricycle's leading shaft 4 is rotatably connected to the chassis of the frame, and the lower end of the leading shaft 4 is fixedly connected to a front fork 5, and the lower end of the front fork 5 is rotatably connected to the front wheel.

[0019] 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 supported by a support plate 2, which is arranged vertically. The lower end of the support plate 2 is welded and fixed on the chassis of the frame, and the steering wheel 1 is connected to the upper end of the support plate 2. The steering wheel 1 is connected to a transmission shaft 3. 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 a universal cross-bite. 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.

[0020] A coupling seat 6 is fixedly connected to the frame. The coupling seat 6 is arranged horizontally. Three extending coupling claws 61 are arranged on the coupling seat 6. The outer ends of the coupling claws 61 are provided with transparent coupling holes. The coupling bolts pass through the coupling holes and are fixed to the corresponding structures on the frame. The transmission mechanism is supported by the coupling seat 6. The coupling seat 6 is hollow and has a transmission cavity inside. The transmission mechanism also includes a power output shaft 8. The inner end of the power output shaft 8 is inserted into the transmission cavity, and the outer end of the power output shaft 8 extends to the outside of the coupling seat 6. The lower end of the transmission shaft 3 extends into the transmission cavity. A transmission structure is arranged between the transmission shaft 3 and the inner end of the power output shaft 8. The transmission structure realizes the transmission of the torque on the transmission shaft 3 to the power output shaft 8. The power output shaft 8 is connected to the pull rod 10 in transmission connection, and the pull rod 10 is connected to the front fork 5 in transmission connection. In order to improve the space utilization, 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. 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 fixedly connected to the faucet shaft 4 through a locking nut, and the pull rod 10 is hinged to the outer end of the swing arm 11 to realize transmission connection.

[0021] As shown in the figure, a plurality of toothed protrusions may be provided on the outer peripheral surface of the power output shaft 8, and these toothed protrusions are arranged in a row along the axial direction of the power output shaft 8, so as to form a rack structure on the power output shaft 8, and a worm structure may be formed on the inner end of the transmission shaft 3, and the transmission is realized by the meshing of the worm structure and the rack structure; or a gear may be sleeved and fixedly connected to the inner end of the transmission shaft 3, and the transmission is realized by the meshing of the gear and the rack structure. The axial movement of the power output shaft 8 is realized by the cooperation of the connecting structure, and the rotation angle of the steering wheel 1 can be limited by the arrangement length of the toothed protrusions in the axial direction of the power output shaft 8. This transmission mechanism can control the wheel to rotate within an amplitude of 71º±2º. Specifically, on the steering wheel 1, the steering wheel 1 can turn one circle to the left or right from the initial position.

[0022] In order to ensure the coordination stability between the transmission structures, a transparent limiting opening is provided on the connection seat 6, and a leaning block 12 is inserted into the transmission cavity from the position of the limiting opening. The leaning block 12 and the transmission structure are arranged on opposite sides of the power output shaft 8. An arc-shaped notch is formed on the end of the leaning block 12 facing the power output shaft 8, and the notch abuts against the outer peripheral surface of the power output shaft 8. On the outer peripheral surface of the connection seat 6, a column ring 62 is provided along the periphery of the limiting opening, and a sealing plug 13 is threadedly connected in the column ring 62. After the sealing plug 13 is connected in place in the column ring 62, the sealing plug 13 limits the radial position of the leaning block 12 in the transmission cavity. In order to ensure stability, a spring can also be provided between the sealing plug 13 and the leaning block 12, so that the leaning block 12 elastically abuts against the outer peripheral surface of the power output shaft 8.

[0023] As another embodiment, the power output shaft 8 is a split structure, including a screw sleeve and a screw connected together by threads, generally the screw is inserted into the connection seat 6, and the screw sleeve extends out of the connection seat 6. Between the screw and the lower end of the transmission shaft 3, there is a bevel gear that meshes with each other. The transmission shaft 3 drives the screw to rotate through the bevel gear, so that the screw sleeve extends out of the connection seat 6, or retracts into the inside of the connection seat 6. Of course, relative to the connection seat 6, the installation positions of the screw and the screw sleeve can be exchanged, that is, the screw sleeve is inserted into the connection seat 6, the screw extends out of the connection seat 6, and one of the bevel gears is fixed on the outer peripheral surface of the screw sleeve. In this split power output shaft 8, the corresponding structure can be determined according to needs. The activity and fixation in the axial or circumferential direction.

[0024] 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.

[0025] 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 steering transmission mechanism for a steering wheel type tricycle, arranged between a steering wheel and a handlebar shaft, comprising a transmission shaft connected to the steering wheel, and a power output shaft connected to the transmission shaft, characterized in that: It also includes a fixed connecting seat, a transmission cavity is provided in the connecting seat, the inner end of the power output shaft is movably inserted in the transmission cavity, and the outer end of the power output shaft extends to the outside of the connecting seat, and the outer end is used for transmission connection with the faucet shaft; the transmission shaft extends into the transmission cavity, and a transmission structure for mutual transmission cooperation is provided between the power output shaft and the transmission shaft in the transmission cavity; the limiting structure is used to limit the axial movement distance of the power output shaft.

2. The steering transmission mechanism of a steering wheel type tricycle according to claim 1, characterized in that: The coupling seat is provided with a limiting hole, a leaning block is provided at the position of the limiting hole in the transmission cavity, the leaning block abuts against the power output shaft, and the leaning block and the transmission structure are arranged on opposite sides of the power output shaft.

3. The steering transmission mechanism of a steering wheel type tricycle according to claim 2, characterized in that: A sealing plug is provided at the position of the limiting hole, and the sealing plug is used to press the leaning block toward the power output shaft.

4. The steering transmission mechanism of a steering wheel type tricycle according to claim 3, characterized in that: On the connection seat, a column ring is arranged at the periphery of the limiting hole, and the sealing plug is arranged in the column ring.

5. The steering transmission mechanism of a steering wheel type tricycle according to any one of claims 1 to 4, characterized in that: A plurality of coupling claws are integrally formed on the outer peripheral surface of the coupling seat, and the coupling claws extend toward the outer side of the coupling seat.

6. The steering transmission mechanism for a steering wheel type tricycle according to any one of claims 1 to 4, characterized in that: The transmission structure includes a plurality of toothed protrusions formed on the power output shaft, and these toothed protrusions are arranged in a row in the axial direction of the power output shaft; a worm or gear for meshing with these toothed protrusions is provided on the transmission shaft; the arrangement dimensions of the toothed protrusions in the axial direction of the power output shaft realize the limitation of the axial movement distance of the power output shaft.

7. The steering transmission mechanism of a steering wheel type tricycle according to any one of claims 1 to 4, characterized in that: The power output shaft is a split structure, including a screw sleeve and a screw connected by threads, and the transmission structure includes bevel gears respectively sleeved on the power output shaft and the transmission shaft, and the two bevel gears are meshed with each other.

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