TWI599507B - Unilateral control of the tricycle - Google Patents

Description

Unilaterally controlled tricycle

The invention relates to a tricycle that can be controlled unilaterally.

Taiwan's M366500 and M364645 patents disclose the existing tricycle structure. These tricycles have a frame in which the front and rear rear wheels are coupled to support the tricycle on the surface. The frame is equipped with two grips and a two-directional control structure, and each direction control structure is connected with a corresponding grip and a rear wheel to operate the tricycle to change the direction of travel.

However, the tricycle uses a bilateral direction control structure. More than one set of direction control structure not only consumes too many components, but also relatively lengthens the time required for installation, while increasing production costs and reducing market competitiveness.

The tricycle disclosed in U.S. Patent No. 8,256,784 has a frame with a wheel support coupled to a front wheel and a front steering mechanism. The front steering mechanism controls the front wheel and determines the direction of the tricycle. The rear part of the frame has an oppositely extending and laterally extending member, and a rear wheel is respectively connected to both ends of the oppositely extending and laterally extending members, and each rear wheel is pivotally connected to the frame through a wheel seat. The rear steering mechanism is connected to the corresponding rear wheel to effectively control the rear wheels of the two rear wheels and the yaw in the same direction to change the driving direction of the tricycle.

The second rear wheel is free, but it cannot be placed at the right angle. This tricycle has two rear steering mechanisms, each of which controls the corresponding rear wheel, which facilitates the two rear wheels to yaw and control the tricycle to move left or right.

If there is only one rear steering mechanism. One of the rear wheels and the rear steering mechanism Even if the other rear wheel is in a free state, it can't be placed at the right angle, or it will hinder the steering of the tricycle, and it will increase the risk of turning over. Moreover, the second rear steering mechanism will also increase production costs, which is not conducive to market competition.

Therefore, how to improve the drawbacks of the tricycle has become an urgent problem to be solved by the present invention.

The inventor of the present invention provides a new tricycle, the main purpose of which is to adopt a unilateral control structure, which is different from the operation mode of the old bilateral linkage mechanism to determine the driving direction, which not only reduces the number of parts, shortens the installation time, but also reduces the production cost and improves the market. Competitiveness.

For the above purposes, the tricycle of the present invention can be unilaterally controlled, comprising: a frame having a main pole, a front fork and a crossbar, the main pole being mounted with a seat, the front fork being detachably connected to One end of the main rod, the center of the cross rod is firmly fixed to the other end of the main rod; an operating member, the center of which is pivotally connected to the main rod; one front wheel and two rear wheels, the front wheel is mounted on the front fork and can be rotated, and can only go straight but cannot change Driving direction; a driven wheel base having two side pieces and a fastener, and a shaft connecting the rear wheel passes through the two side pieces, the fastener wheel housing is mounted on one end of the cross bar, so that the shaft is not tightly The length of the firmware center is extended; a driving wheel seat is connected to the corresponding rear wheel at the other end of the crossbar through the driving wheel seat; a connecting rod is connected at one end to the operating member, and the other end is connected to the driving wheel base.

When the operating member swings, the operating member pulls the linkage lever to synchronously actuate the driving wheel carrier. The driven wheel carrier is substantially parallel with the driving wheel seat according to the driving of the tricycle on the ground, and the steering effect of the second rear wheel biasing the same side of the frame is achieved.

Wherein, the driving wheel seat has a ring piece. Two universal joints are respectively connected to the linkage rod One of the two ends, the 20,000 joint is connected to the ring of the driving wheel seat through other fasteners, and the other universal joint is coupled with the operating member to form a linkage mechanism.

The fastener locked to the ring is hooked by one end of a tension spring. The tension spring is hooked at the other end to a fixing post fixed to the crossbar, so that the driving wheel seat returns to the original position as a normal state.

Thus, the present invention is different from the old-style bilateral linkage structure, but adopts a unilaterally controlled structure to achieve the control purpose of the tricycle driving direction, so that the user can experience more control pleasure. At the same time, the tricycle of the present invention not only has a small number of components, shortens installation time, reduces manufacturing costs, and improves market competitiveness.

The above-described objects, structures and functions of the present invention will be described with reference to the detailed description of the embodiments.

10‧‧‧Tricycle

11‧‧‧Drive wheel seat

12‧‧‧ front wheel

13‧‧‧ side film

14‧‧‧ Rear wheel

15, 15A‧‧‧fasteners

16‧‧‧Adjustment device

17‧‧‧ bearing

18‧‧‧Drive wheel

20‧‧‧ main pole

22‧‧‧ Front fork

24‧‧‧crossbar

26‧‧‧ pedal

28‧‧‧ universal joint

30‧‧‧ seats

32‧‧‧Operating parts

34‧‧‧ grip

50‧‧‧ linkage rod

51‧‧‧Fixed column

56‧‧‧ ring

58‧‧‧ stretching spring

62‧‧‧ Length extension line

64‧‧‧Axis

78‧‧‧ Nuts

S‧‧‧ distance

Figure 1 is a perspective view of a preferred embodiment of the tricycle of the present invention.

Figure 2 is a bottom view of the tricycle.

Figure 3 is a side view of the driven wheel base coupling the rear wheel.

Figures 4 and 5 are schematic diagrams of the continuous operation of the steering of the tricycle.

The first and second figures show a preferred embodiment of the tricycle 10. A front wheel 12 and two rear wheels 14 are mounted on a frame to form three support points for facilitating the tricycle 10 to travel on the ground.

The frame is generally T-shaped and consists of a main pole 20, a front fork 22 and a crossbar 24. The main rod 20 is a tubular body having a front fork 22 at one end and a central portion of the crossbar 24 at the other end, and an adjusting device 16, a seat 30 and an operating member 32 are mounted on the main rod 20. The front fork 22 extends or retracts relative to the main rod 20, changing the overall length of the frame. The exposed end of the front fork 22 is bifurcated for connecting the axles of the front wheel 12 to restrict the front wheel 12 from rotating at the front end of the frame, and can only go straight but does not have a turn. To the function. A driven wheel base 11 and a driving wheel base 18 are respectively mounted on the two ends of the cross bar 24. The driven and active two wheel seats 11, 18 are pivotally connected to the corresponding rear wheels 14.

The adjusting device 16 referred to herein is composed of a latch and a quick release. The latch prevents the front fork 22 from telescopically moving relative to the main rod 20, and the depth of the frame adjusts the total length. The quick release reduces the width of the opening of the main rod 20 so that the main rod 20 can quickly grip the front fork 22.

The operating member 32 is generally a rod body that is pivotally centered on the main rod 20 in front of the seat 30. The handle 32 is connected to a grip 34 at both ends, so that the two grips 34 are located on both sides of the seat 30. At least one grip 34 has a brake handle (not shown), and the brake handle is connected to a brake mounted on the front fork 22 (not shown), and the brake handle drives the brake to lower the rotation speed of the front wheel 12 or stop the rotation.

The front wheel 12 connects the two pedals 26 which are staggered in the axial center. When a user sits in the seat 30, the two grips 34 are grasped by both hands, and the feet are stepped on the pedals 26 to drive the front wheels 12 to drive the tricycle 10 to the ground.

As shown in Fig. 3, the driven wheel base 11 has two side pieces 13 and a fastener 15A which are passed through a shaft 64 which is connected to the rear wheel 14. The fastener 15A may be a bolt or a screw that is locked by a nut 78 through the driven wheel housing 11, a bearing 17, and the crossbar to complete the assembly work of the rear wheel 14 and the frame. At this point, the shaft 64 is not on a length extension line 62 that passes through the center of the fastener 15A such that the shaft 64 is spaced a distance S from the fastener 15A to facilitate free rotation of the rear wheel 14 about the fastener 15A.

Referring back to Figures 1 and 2, the structure of the driving wheel base 18 is substantially the same as that of the driven wheel base 11, except that a ring piece 56 welded to the side of the driving wheel base 18 is added.

In other words, the two side panels are also present on the drive wheel mount 18 in the same manner as the other fasteners, allowing the rear wheel 14 to be pivotally connected by the other axles between the side panels of the drive wheel mount 18. Although the driving wheel base 18 is fastened to one of the two ends of the crossbar 24 by the fastener, and the shaft is not in the center of the fastener passing through The length extension line facilitates rotation of the drive wheel housing 18 along with the rear wheel 14 about the fastener. However, the ring piece 56 restricts the driving wheel base 18 from being operated by an external force to be steered relative to the cross bar 24 (described further below) than the driven wheel base 11 being free to rotate on the cross bar 24.

The two-way joints 28 are respectively screwed to the two ends of a linkage rod 50. One of the two-way joints 28 is coupled to the ring piece 56 of the drive wheel housing 18 via other fasteners 15, allowing one end of the tension spring 58 to hook the fastener 15 and the other end to a fixed post that is secured to the crossbar 24. 51. It is normal to return the driving wheel base 18 to its original position. The other universal joint 28 is coupled to the operating member 32 such that the linkage rod 50 and the driving wheel housing 18 constitute an interlocking mechanism.

The original position of the drive wheel mount 18 herein generally refers to the orientation of the drive wheel mount 18 generally perpendicular to the crossbar 24.

When the operating member 32 is biased by a certain amount in the clockwise direction of FIG. 4, the interlocking lever 50 is pulled by the operating member 32 to urge the driving wheel housing 18 together with the rear wheel 14 to rotate toward the main lever 20 of the frame. At this moment, the direction of the driven wheel base 11 is different from the yaw direction of the driving wheel base 18. Regardless of the orientation of the driven wheel housing 11, in the case where the tricycle 10 is traveling on the ground, the driven wheel base 11 can automatically rotate to a direction substantially parallel to the driving wheel housing 18, so that the two rear wheels 14 are biased to the same side of the frame. In order to achieve the effect and purpose of the tricycle 10 steering.

At this point, the tension spring 58 is deformed by force to provide the force required to return the drive wheel housing 18 to its original position.

When the operating member 32 is yawed in the counterclockwise direction of FIG. 4, the interlocking lever 50 urges the driving wheel housing 18 to rotate to the outside of the frame. The driven wheel base 11 is substantially parallel to the driving wheel base 18, and the two rear wheels 14 are biased toward the same side of the frame (i.e., above the fifth drawing) to obtain the effect of the tricycle 10 turning.

10‧‧‧Tricycle

11‧‧‧Drive wheel seat

12‧‧‧ front wheel

14‧‧‧ Rear wheel

15‧‧‧fasteners

16‧‧‧Adjustment device

18‧‧‧Drive wheel

20‧‧‧ main pole

22‧‧‧ Front fork

24‧‧‧crossbar

26‧‧‧ pedal

28‧‧‧ universal joint

30‧‧‧ seats

32‧‧‧Operating parts

34‧‧‧ grip

50‧‧‧ linkage rod

51‧‧‧Fixed column

56‧‧‧ ring

58‧‧‧ stretching spring

Claims (4)

A tricycle capable of unilateral control includes: a frame having a main pole (20), a front fork (22) and a crossbar (24), the main pole (20) being mounted with a seat (30), The front fork (22) is detachably connected to one end of the main rod (20), the center of the cross rod (24) is firmly fixed to the other end of the main rod (20); and an operating member (32) is pivotally connected to the main rod ( 20), the operating member (32) is in front of the seat (30); a front wheel (12) and two rear wheels (14) are connected to the two-interlacable pedal (26) at the axial portion of the front wheel (12). The front wheel (12) is rotatably mounted on the front fork (22), and can only go straight but cannot change the driving direction; a driving wheel seat (18) and a driven wheel base (11), each wheel seat (11, 18) There is a fastener (15A) and a shaft (64). The fastener (15A) is mounted on the crossbar (24) such that the active and driven two wheel seats (11, 18) are located at different ends of the crossbar (24). (64) not on a length extension line (62) passing through the center of the fastener (15A), the active and driven two wheel bases (11, 18) are connected to the corresponding rear wheel (14) through the shaft (64); (50), one end of which is connected to the operating member (32), and the other end is connected to the driving wheel base (18); when the operating member (32) is swung, the operation The member (32) pulls the linkage rod (50) to synchronize the driving wheel base (18), and the driven wheel base (11) is substantially parallel to the driving wheel base (18) according to the tricycle (10) running on the ground, reaching two rears. The wheel (14) is biased towards the steering side of the same side of the frame. According to the scope of claim 1, the unilaterally controlled tricycle, wherein the driving wheel base (18) has a ring piece (56); the two universal joints (28) are respectively connected to the two ends of the linking rod (50). One of the two-way joints (28) is connected to the driving wheel base (18) through other fasteners (15) The ring piece (56) and the other universal joint (28) are coupled to the operating member (32) to form a linkage mechanism. According to the unilaterally controlled tricycle of claim 2, wherein the fastener (15) locked to the ring (56) is hooked by a tension spring (58), the tension spring (58) The other end is hooked to a fixing post (51) fixed to the crossbar (24), and the driving wheel base (18) is returned to the original position as a normal state. According to the scope of claim 1, the unilaterally controlled tricycle, wherein the operating member (32) has a grip (34) at each end, and the two grips (34) are located on both sides of the seat (30).