TW201718314A - Tricycle unilateral directional control structure comprising a front wheel, a driving wheel seat, and a driven wheel seat mounted to a frame - Google Patents

Abstract

A tricycle comprises a front wheel, a driving wheel seat, and a driven wheel seat mounted to a frame. Each wheel seat is connected to a rear wheel. The driven wheel seat is free, and the driving wheel seat is controlled by a connection rod for steering so that the driven wheel seat may rotate on its own, along with the two rear wheels being arranged side by side, making it easy to complete a unilateral operation and change the direction of the tricycle.

Description

Tricycle unidirectional direction control structure

The invention relates to a tricycle unidirectional direction control structure.

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.

Because the axis of the rear wheel is on a virtual line from the pivot point of the wheel base to the frame to the contact point of the rear wheel and the ground, the rear wheel is free, but can not be placed in the correct direction according to the direction of the tricycle. The angle is relatively obstructing the steering of the tricycle. Therefore, the tricycle of U.S. Patent No. 8,256,784 must adopt a two-rear steering mechanism, and each rear steering mechanism controls the corresponding rear wheel, which facilitates the second rear wheel to yaw and control the tricycle to move left or right.

In the case of the U.S. Patent No. 8,256,784, there is only one rear steering machine. One of the two rear wheels is connected, and the other rear wheel remains free, which still hinders the steering of the tricycle and increases 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 with the main purpose of adopting a unilateral direction control structure, which is different from the old bilateral linkage mechanism in determining the operation mode of the tricycle driving direction, achieving a small number of components, shortening the installation time, reducing the production cost, and improving the market. Competitive and other effects.

Due to the above object, the tricycle unidirectional direction control structure of the present invention comprises: a frame, a shaft assembly and two grips, and the two grips are supported by the shaft assembly to swing back and forth on both sides of the frame; a lever, which maintains a linkage relationship with the grip; a front wheel that is connected to the front end of the frame to be rotatable in a straight line manner; a driven wheel base, a driving wheel seat and two rear wheels, the active and driven two wheel seats are rotatable The ground is connected to both sides of the rear end of the frame, and each wheel seat is connected with a corresponding rear wheel. The driving wheel base is coupled with the linkage rod and is not at the same end as the grip. The driven wheel base is free, and the two strips are substantially perpendicular to the surface and respectively The two straight lines are separated from each other by a virtual straight line at the pivotal joint of the frame and the axis of the rear wheel.

When the two grips are yawed, the linkage rod drives the driving wheel base to rotate with the rear wheel. The driven wheel base can rotate relative to the frame due to the aforementioned distance, so that the two rear wheels roll side by side and roll in the same direction to achieve tricycle unilateral control driving. The purpose of the direction.

Wherein, the two grips are firmly fixed to the two ends of the operating rod, and the operating rod and the shaft assembly are coupled with a rod, and the supporting rod maintains a linkage relationship with one end of the connecting rod. The driving wheel seat is firmly driven The follower links the other end of the linkage rod to form a linkage relationship between the operating rod and the rear wheel. Of course, the length of the linkage rod is adjustable.

In addition, the driving wheel seat is firmly secured by a ring piece, and the frame is firmly fixed to a long plate near the driving wheel seat, and a bolt is locked on the long plate, allowing a tension spring to respectively hook the bolt and the ring piece to provide a rear wheel return. The required force.

Thus, the unilateral direction control structure of the present invention, unlike the old bilateral linkage structure, can achieve the same purpose of controlling the direction of travel of the tricycle, so that the user can experience more control pleasure. At the same time, the number of components of the invention is small, the installation time is shortened, the production cost is reduced, and the competitiveness of the market is improved.

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

14‧‧‧ Rear wheel

16‧‧‧Adjustment device

18‧‧‧Drive wheel

20‧‧‧ main pole

22‧‧‧ Front fork

24‧‧‧crossbar

25‧‧‧ round tube

26‧‧‧ pedal

28‧‧‧Long board

30‧‧‧Cushion

32‧‧‧Back of the chair

34‧‧‧ grip

40‧‧‧Direction control structure

42‧‧‧Operator

44‧‧‧ pole

50‧‧‧ linkage rod

51‧‧‧ bolt

52‧‧‧ Screws

54‧‧‧ Followers

56‧‧‧ ring

58‧‧‧ stretching spring

60‧‧‧ surface

62‧‧‧ Straight line

64‧‧‧Virtual line

70‧‧‧Axis assembly

72‧‧‧Axis

74‧‧‧ Bearing

76‧‧‧External management

78‧‧‧ Nuts

S‧‧‧ distance

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

Figure 2 is a schematic diagram of the unilateral direction control structure of the tricycle.

Figure 3 is a side view of the driven wheel.

Figure 4 is a cross-sectional view of the shaft assembly.

Figure 5 is a diagram of the imaginary state when the two rear wheels are stationary.

Figures 6 and 7 are schematic diagrams of the second rear wheel moving forward or backward.

As shown in Figures 1 to 4, it is a preferred embodiment of a tricycle 10. The tricycle 10 is composed of a plurality of wheels and a frame.

These wheels are defined as a front wheel 12 and two rear wheels 14, which have an axle and two pedals 26 that are coupled to the axles for interlacing motion. Each of the rear wheels 14 is coupled to one of the driven, active two wheel seats 11, 18.

The driving wheel base 18 has a follower 54 and a ring piece 56 which are welded to different ends of the driving wheel base 18. The configuration of the driven wheel base 11 is the same as that of the driving wheel base 18.

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 that locks a mat 30 and a seat back 32. The main rod 20 has a front fork 22 at one end and a cross rod 24 at the other end. An adjustment device 16 is mounted on the main rod 20, and the adjustment device 16 fixes the front fork 22 deep into the main rod 20 to determine the total length of the frame.

The bifurcated end of the front fork 22 is connected to both sides of the axle of the front wheel 12, and the front wheel 12 is restricted to rotate only in the straight direction at the front end of the frame, but does not have the function of steering. A brake device (not shown) is mounted on the front fork 22, and the brake device is connected to a brake handle (not shown) to lower the rotation speed of the front wheel 12 or to stop the front wheel 12. The brake handle is mounted on one of the two grips 34.

The crossbar 24 has a shaft assembly 70 in the center. The shaft assembly 70 is comprised of a shaft 72, two bearings 74 and an outer tube 76. The shaft 72 is fixed to the outside of the crossbar 24, which passes through the bearing 74 and locks a nut 78. The outer tube 76 is urged against the outer circumferential surface of the bearing 74 and is biased to rotate relative to the shaft 72.

The crossbar 24 has two round tubes 25, and the round tubes 25 are welded on both sides of the crossbar 24. Each of the circular tubes 25 has a bearing (not shown) for pivotally connecting the corresponding driven wheel base 11 or the driving wheel base 18 The three rear wheels 12 are combined with the front wheel 12 to form three support points, and the tricycle 10 is stopped on a ground surface 60.

A virtual line 62 is drawn between the pivotal portion of the circular tube 25 and the driven wheel base 11 to the point of contact of the axis of the rear wheel 14 with the surface 60. The axis of the rear wheel 14 of the driven wheel base 11 is not on the straight line 62, so that the axis of the rear wheel 14 and the straight line 62 are separated from each other by a distance S.

In other words, the line 62 is separated by the same distance S from a virtual line 64 that passes through the axis of the rear wheel 14 of the driven wheel housing 11 and is substantially perpendicular to the surface 60. In this way, the distance S is equivalent to the force arm, which helps the driven wheel base 11 to swing to the correct angle in the driving direction, and can be substantially parallel to the rear wheel of the driving wheel seat, effectively solving the drawbacks of the traditional rear wheel hindering the driving direction.

These grips 34 are associated with a directional control structure 40. In the present embodiment, the directional control structure 40 is comprised of an operating lever 42 and an adjustable length linkage bar 50.

Wherein, the operating rod 42 is substantially U-shaped and surrounds the seat back 32. The lever 42 is connected at both ends to the corresponding grip 34 such that the two grips 34 are located on both sides of the seat cushion 30. The lever 42 is coupled to the outer tube 76 of the shaft assembly 70 to couple a rod 44 to which a screw member 52 is locked. Therefore, the configuration in which the operating rod 42 and the strut 44 are coupled through the shaft assembly 70 is sufficient to support the two grips 34 to swing back and forth on both sides of the main rod 20.

One end of the linkage rod 50 maintains the interlocking relationship with the screw member 52, and the other end is connected with the follower 54 to form the interlocking relationship between the operating rod 42 and the rear wheel 14.

In addition, a long plate 28 is secured adjacent the main wheel base 18 at the crossbar 24, the long plate 28 locking a bolt 51, allowing a tension spring 58 to hook the bolt 51 and the ring piece 56, respectively, to provide the rear wheel 14 The force required for homing.

When a user sits on the seat cushion 30 and steps on the two pedals 26, the front wheel 12 and the rear wheel 14 drive the entire tricycle 10 forward or backward for a certain stroke.

In the fifth and sixth figures, the driving wheel housing 18 is limited to the interlocking lever 50 and remains in a stationary state. The driven wheel base 11 is free and is substantially perpendicular to the driving wheel base 18 such that the two rear wheels 14 are not side by side.

When the tricycle travels in the direction of the arrow in Fig. 6, the crossbar 24 applies a force to the driven wheel base 11, and the product of the force arm (i.e., the aforementioned distance S) is equal to a couple that causes the driven wheel base 11 to turn ( Or called the moment). Therefore, the two rear wheels 14 are automatically side by side, allowing the tricycle to smoothly advance a certain stroke.

When the tricycle travels in the direction of the arrow in Fig. 7, the driven wheel base 11 comes from the orientation of Fig. 5 to the position of Fig. 7, so that the tricycle can smoothly retreat a certain stroke.

Even if the driving wheel base 18 is limited to the linkage rod 50, it is turned. The crossbar 24 drives the driven wheel base 11 to rotate, so that the two rear wheels 14 are arranged side by side, and the steering process of the tricycle can be easily completed.

10‧‧‧Tricycle

11‧‧‧Drive wheel seat

12‧‧‧ front wheel

14‧‧‧ Rear wheel

16‧‧‧Adjustment device

18‧‧‧Drive wheel

20‧‧‧ main pole

22‧‧‧ Front fork

24‧‧‧crossbar

26‧‧‧ pedal

30‧‧‧Cushion

32‧‧‧Back of the chair

34‧‧‧ grip

40‧‧‧Direction control structure

42‧‧‧Operator

44‧‧‧ pole

50‧‧‧ linkage rod

54‧‧‧ Followers

56‧‧‧ ring

70‧‧‧Axis assembly

Claims (6)

A tricycle unilateral direction control structure includes: a frame, a shaft assembly (70) and two grips (34), and supports two grips (34) on both sides of the frame through the shaft assembly (70) Swinging; a linkage rod (50) that maintains a linkage relationship with the grip (34); a front wheel (12) that is rotatably connected to the front end of the frame to be rotatable; a driven wheel base (11), an active a wheel base (18) and two rear wheels (14), the active and driven two wheel bases (11, 18) are rotatably connected to both sides of the rear end of the frame, and each wheel base (11, 18) is connected with a corresponding rear wheel (14), the driving wheel base (18) is coupled with the linkage rod (50) and is not at the same end as the grip (34), the driven wheel base (11) is free, and the rear wheel of the driven wheel base (11) ( 14) The axis is not on a virtual straight line (62) that is drawn from the pivoting point of the driven wheel base (11) to the rear wheel (14) and the surface (60), so that the straight line (62) and the rear The axes of the wheels (14) are separated from each other by a distance (S); when the two are substantially perpendicular and are respectively yawed by the second and second grips (34), the linkage rod (50) drives the driving wheel base (18) In conjunction with the rear wheel (14) steering, the driven wheel base (11) is phased by the aforementioned distance (S) Rotate the frame so that the two rear wheels (14) roll side by side and roll in the same direction, so that the tricycle can control the driving direction unilaterally. The tricycle unidirectional direction control structure according to claim 1, wherein the straight line (62) is separated from a virtual line (64) passing through the axis of the rear wheel (14) and substantially perpendicular to the surface (60). The same distance (S). According to the tricycle unidirectional direction control structure described in claim 1, wherein the two grips (34) are fixed to both ends of an operating rod (42), and the operating rod (42) and the shaft assembly (70) A rod (44) is coupled between the rod (44) and the end of the linkage rod (50). According to the unilateral direction control structure of the tricycle according to Item 3 of the patent application scope, wherein the main The moving wheel base (18) secures a follower (54), and the follower (54) is coupled to the other end of the interlocking rod (50) to form a linkage relationship between the operating rod (42) and the rear wheel (14). The tricycle unidirectional direction control structure according to claim 1, wherein the length of the linkage rod (50) is adjustable. According to the unilateral directional control structure of the tricycle according to claim 4, wherein the driving wheel base (18) is secured to a ring piece (56), and the frame is firmly adjacent to the driving wheel base (18). ), locking a bolt (51) on the long plate (28), allowing a tension spring (58) to hook the bolt (51) and the ring piece (56) at the two ends, respectively, to provide the rear wheel (14) required for returning The force.