TW201520116A - Unicycle and auxiliary steering device thereof - Google Patents

Abstract

An auxiliary steering device mounted on a frame of a unicycle is disclosed. The auxiliary steering device comprises two auxiliary wheel sets, each of which includes a pair of arms, a connection member, an extension member, a first lever, two second levers, two linkage rods, and two auxiliary wheels. Each supporting arm is pivotally connected to the frame. The connection member is mounted between the pair of supporting arms. The extension member is connected to the connection member. The first lever has two end parts and a first fulcrum. The first fulcrum is pivotally connected to the extension member. Each of the two second levers has a first end, a second end, and a second fulcrum. The two second fulcrums are respectively pivotally connected to the two end parts of the first lever. Two ends of each linkage rod are respectively pivotally connected to the connection member and the first end of the corresponding second lever. Each auxiliary wheel is mounted at the second end of the corresponding second lever in a rotational manner.

Description

Wheelbarrow and its auxiliary steering device

The present invention relates to a wheelbarrow and its auxiliary steering device that assists the wheelbarrow to maintain balance by providing an auxiliary wheel.

The conventional wheelbarrow includes a fork tube, a wheel rotatably disposed at a lower end of the fork tube, a crank coaxial with the wheel, and two pedals respectively disposed on the two cranks, and a tube can be disposed at an upper end of the fork tube And a seat cushion disposed at the top of the seat tube. When the user rides on the wheelbarrow, the wheel can be rotated by pedaling the pedal.

Since the conventional wheelbarrow has only a single wheel, beginners are not easy to maintain balance and are prone to injury or frustration during the learning phase. To this end, some unicycles are additionally equipped with two smaller auxiliary wheels, which can be rolled at the same time as the wheels, so that the user can easily maintain balance for beginners to learn.

However, the setting of the auxiliary wheel is easy to affect the steering ability of the unicycle. Therefore, how to make the unicycle with the auxiliary wheel balance the balance and steering performance is worthy of consideration by those in the field.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide an auxiliary steering apparatus that provides support and prevents slippage when the wheelbarrow is turning.

In order to achieve the foregoing and other objects, the present invention provides an auxiliary steering device for use in a frame of a unicycle, the frame is provided with a rotatable wheel, and the auxiliary steering device includes two auxiliary wheel sets for respectively Provided on the front and rear sides of the frame, each of the auxiliary wheel sets includes a pair of support arms, a connecting member, an extension member, a first lever, two second levers, and two corresponding two second levers. The connecting rod and the two auxiliary wheels corresponding to the two second levers. Each of the support arms is pivotally connected to the frame, and the connecting member is disposed between the pair of support arms, the extension member Attached to the connecting member, the first lever has two ends and a first fulcrum between the two ends, the first fulcrum is pivotally connected to the extension, and the second levers each have a first a second end and a second fulcrum between the first end and the second end, wherein the two second pivot points are respectively pivotally connected to the two ends of the first lever, and the two ends of the connecting rod are respectively pivotally connected to The connecting member and the first end of the corresponding second lever, each of the auxiliary wheels is rotatably disposed at a second end of the corresponding second lever.

Another primary object of the present invention is to provide a wheelbarrow having better steering performance.

In order to achieve the foregoing and other objects, the present invention provides a wheelbarrow having a frame, a wheel rotatably disposed on the frame, a drive assembly for driving the wheel to rotate, and an auxiliary steering provided on the frame. The auxiliary steering device includes two auxiliary wheel sets, and the two auxiliary wheel sets are respectively disposed on the front and rear sides of the frame, and each of the auxiliary wheel sets includes a pair of support arms, a connecting member, an extension member, and a first One lever, two second levers, two separate rods corresponding to the second lever, and two auxiliary wheels corresponding to the two second levers. Each of the support arms is pivotally connected to the frame, the connecting member is disposed between the pair of support arms, the extension member is coupled to the connecting member, the first lever has two ends and one at the two ends The first fulcrum is pivotally connected to the extension member, and the two second levers each have a first end, a second end and a second fulcrum between the first end and the second end. The second fulcrum is pivotally connected to the two ends of the first lever, and the two ends of the connecting rod are respectively pivotally connected to the first end of the connecting member and the corresponding second lever, and the auxiliary wheels are rotatably It is disposed at the second end of the corresponding second lever.

With the previous design, the two auxiliary wheels of each auxiliary wheel set can be interlocked with each other and automatically attached to the ground, and can generate a large camber angle and a steering angle to improve the steering performance and anti-skid effect of the unicycle through the bend, so that the beginner It can also be easily used.

10‧‧‧ wheelbarrow

20‧‧‧ frame

21‧‧‧Forked Tube Department

22‧‧‧Connecting Department

221‧‧‧First fixed hole

222‧‧‧Second fixing hole

30‧‧‧ Wheels

40‧‧‧Drive components

41‧‧‧ crank

42‧‧‧ pedal

50‧‧‧ seat cushion

51‧‧‧ seatpost

60‧‧‧Auxiliary steering gear

62, 64‧‧‧Auxiliary wheel set

70‧‧‧Support arm

80‧‧‧Connecting parts

90‧‧‧Extensions

100‧‧‧First leverage

101‧‧‧End

102‧‧‧ first pivot point

103‧‧‧ bushing

104‧‧‧ Bearing

105‧‧‧ axle block

110‧‧‧second leverage

110a‧‧‧ second lever on the inside

110b‧‧‧second lever on the outside

111‧‧‧ first end

112‧‧‧ second end

113‧‧‧second pivot point

114‧‧‧Axis hole

120‧‧‧ linkage

130‧‧‧Assistance wheel

130a‧‧‧Auxiliary wheel on the inside

130b‧‧‧Auxiliary wheel on the outside

140‧‧‧Shock absorber

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is a partial exploded view of a preferred embodiment of the present invention.

Figure 3 is an exploded view of the auxiliary steering device in accordance with a preferred embodiment of the present invention.

Figure 4 is a side elevational view of a preferred embodiment of the invention.

Figure 5 is a front elevational view of a preferred embodiment of the present invention.

Figure 6 is a plan view of a preferred embodiment of the present invention.

Figure 7 is a front elevational view of the right-handed state of the preferred embodiment of the present invention.

Figure 8 is a plan view showing the right-bend state of the preferred embodiment of the present invention.

Referring to Figures 1-6, in a preferred embodiment of the present invention, a wheelbarrow 10 has a frame 20, a wheel 30 rotatably disposed on the frame 20, and a drive assembly for driving the wheel 30 to rotate. 40. A seat cushion 50 disposed at a top end of the frame 20 and a pair of auxiliary steering devices 60 disposed on the frame 20.

The frame 20 has a fork portion 21 and a connecting portion 22 at the bottom end of the fork portion 21. The wheel 30 is disposed between the connecting portions 22 of the frame 20, and the connecting portion 22 has a first fixing hole 221 and a second portion. The fixing hole 222 is fixed.

The drive assembly 40 includes a crank 41 coupled to the shaft of the wheel 30 and a pedal 42 disposed at the free end of the crank 41. The user can drive the wheel 30 to rotate by pedaling the pedal 42. The seat cushion 50 is inserted into the upper end of the fork pipe portion 21 by the seat post 51 for the user to ride.

The auxiliary steering device 60 includes two auxiliary wheel sets 62 and 64 respectively disposed on the front and rear sides of the frame 20, and each of the auxiliary wheel sets 62 and 64 includes a pair of support arms 70, a connecting member 80, and an extension member 90. A first lever 100, two second levers 110, two links 120 corresponding to the two second levers 110, and two auxiliary wheels 130 corresponding to the two second levers 110.

Each of the support arms 70 is pivotally connected to the first fixing hole 221 of the frame 20 at one end thereof, and the connecting member 80 is disposed between the other ends of the pair of supporting arms 70. The manner in which the connecting member 80 is coupled with the supporting arm 70 includes But it is not limited to the screwing means. The extension member 90 is coupled to the connector member 80, and preferably the extension member 90 is perpendicular to the axis of rotation of the wheel 30. In this embodiment, the extension member 90 extends integrally from the bottom surface of the connector member 80. However, in other possible embodiments, the connector member 80 and the extension member 90 may be separate components and joined in other manners.

The first lever 100 has a second end portion 101 and a first pivot point 102 between the two end portions 101. The first pivot point 102 is pivotally connected to the extension member 90. In this embodiment, the first fulcrum 102 of the first lever 100 has a sleeve 103, the extension member 90 is formed into a straight rod shape, and the sleeve 103 is sleeved on the extension member 90, and a bearing 104 is further disposed therebetween. Thereby, the first lever 100 can pivot with the extension member 90 as an axis.

Each of the second levers 110 has a first end 111, a second end 112, and a second fulcrum 113 between the first and second ends 111 and 112. The second fulcrums 113 of the second levers 110 respectively pivot It is connected to both end portions 101 of the first lever 100. In the present embodiment, the end 101 of the first lever 100 has a shaft block 105. The second fulcrum 113 of the second lever 110 has a shaft hole 114 and is pivotally connected to the shaft block 105 of the first end portion 101 of the first lever 100.

The two ends of the connecting rods 120 are respectively pivotally connected to the front end of the connecting member 80 and the first end 111 of the corresponding second lever 110, and each of the auxiliary wheels 130 is rotatably disposed at the second of the corresponding second lever 110. End 112.

In order to provide a better supporting force during steering, the auxiliary steering device 60 of the present embodiment further includes two pairs of shock absorbers 140 respectively corresponding to the two auxiliary wheel sets 62, 64, and each of the shock absorbers 140 is respectively disposed on Between the second fixing hole 222 of the frame 20 and the middle section of the different supporting arms 70, such a design can prevent the dumping of the wheelbarrow 10 from being excessively pressed.

Please refer to the schematic diagram of the right-bend state of the preferred embodiment of Figures 7 and 8. Based on the multi-link system configuration of the auxiliary steering device, the two auxiliary wheels 130 of each of the auxiliary wheel sets 62, 64 are in a linked relationship, for example, when the wheelbarrow 10 is bent right (or left bent), the auxiliary wheel 130a and the vehicle located inside. The distance between the frames 20 is shortened. At this time, the second lever 110a located on the inner side drives the first lever 100 to swing, so that the second lever 110b located on the outer side also yaws, so that the auxiliary wheel 130b located on the outer side is away from the frame 20. In this way, the wheel 30 and the four auxiliary wheels 130 can be kept attached to the ground, so that the wheelbarrow 10 has better steering stability. At the same time, such a design can generate a large camber angle and steering angle, improve the steering performance of the wheelbarrow 10 and prevent slipping, so that the user can grasp the skill of riding the wheelbarrow 10 in a short time under safe conditions. .

Finally, it must be stated that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention. Other equivalent substitutes or variations should also be the scope of the patent application of the present application. Covered.

10‧‧‧ wheelbarrow

20‧‧‧ frame

21‧‧‧Forked Tube Department

22‧‧‧Connecting Department

221‧‧‧First fixed hole

222‧‧‧Second fixing hole

30‧‧‧ Wheels

40‧‧‧Drive components

41‧‧‧ crank

42‧‧‧ pedal

50‧‧‧ seat cushion

51‧‧‧ seatpost

62, 64‧‧‧Auxiliary wheel set

70‧‧‧Support arm

80‧‧‧Connecting parts

100‧‧‧First leverage

110‧‧‧second leverage

120‧‧‧ linkage

130‧‧‧Assistance wheel

140‧‧‧Shock absorber

Claims (8)

An auxiliary steering device is provided for one frame of a unicycle, the frame is provided with a rotatable wheel, and the auxiliary steering device comprises two auxiliary wheel sets for respectively disposed on the front and rear sides of the frame, respectively The auxiliary wheel set includes: a pair of support arms for pivoting to the frame; a connecting member disposed between the pair of support arms; an extension member coupled to the connecting member; a first lever having two ends And a first fulcrum located between the two ends, the first fulcrum is pivotally connected to the extension; and the second levers each have a first end, a second end, and a first end and a second end a second fulcrum between the two pivot points respectively connected to the two ends of the first lever; two respective connecting rods corresponding to the second lever, each of the two ends of the connecting rod is pivotally connected to the a connecting member and a first end corresponding to the second lever; and two auxiliary wheels respectively corresponding to the second lever, each of the auxiliary wheels being rotatably disposed at a second end of the corresponding second lever. The auxiliary steering device of claim 1 further includes two pairs of shock absorbers respectively corresponding to the two auxiliary wheel sets, each of the shock absorbers being disposed between the frame and the different support arms. The auxiliary steering device of claim 1, wherein each of the support arms is pivotally connected to the frame at one end thereof, and the connecting member is disposed between the other ends of the pair of support arms. The auxiliary steering device of claim 1, wherein both ends of the first lever each have a shaft block, and the second fulcrum of each of the second levers has a shaft hole and a shaft block of one end of the first lever Pick up. A wheelbarrow having a frame, a wheel rotatably disposed on the frame, a drive assembly for driving the wheel to rotate, and an auxiliary steering device disposed on the frame, the auxiliary steering device including two auxiliary wheel sets The auxiliary wheel sets are respectively disposed on the front and rear sides of the frame, and each of the auxiliary wheel sets includes: a pair of support arms pivotally connected to the frame; a connecting member disposed between the pair of support arms; An extension member is coupled to the connector; a first lever having a second end and a first fulcrum between the two ends, the first fulcrum being pivotally connected to the extension member; and the second lever Having a first end, a second end, and a second fulcrum between the first end and the second end, the second fulcrums are respectively pivotally connected to the two ends of the first lever; a two-lever connecting rod, wherein two ends of the connecting rod are respectively pivotally connected to the connecting end and the first end of the corresponding second lever; and two auxiliary wheels corresponding to the two second levers, each of the auxiliary wheels Rotatingly disposed at a second end of the corresponding second lever. The unicycle of claim 5, wherein the auxiliary steering device further comprises two pairs of shock absorbers respectively corresponding to the two auxiliary wheel sets, each of the shock absorbers being disposed between the frame and the different support arms. The unicycle of claim 5, wherein each of the support arms is pivotally connected to the frame at one end thereof, and the connecting member is disposed between the other ends of the pair of support arms. The wheelbarrow of claim 5, wherein each of the two ends of the first lever has a shaft block, and the second fulcrum of each of the second levers has a shaft hole pivotally connected to the shaft block of one end of the first lever.