TWI710492B - Dual front wheel steering structure - Google Patents

Abstract

The invention relates to a dual front wheel steering structure. Primarily, a sleeve of an operating unit is sleeved with a leading rod, and a front wheel chassis of a steering unit is assembled at a bottom of the leading rod. Furthermore, each of two assembling portions at two sides of the front wheel chassis is pivotally with a front-wheel swinging arm, and a connecting rod is pivotally connected between the two front-wheel swinging arms. Moreover, an outside of each of the two front-wheel swinging arms is provided with a front wheel. Thereby when a user wants to turn at a high speed, he/ she can utilize his/her body weight or exert to push down one side of a handle of the leading rod to tilt the two front wheels to one side to achieve a high-speed turn. When the user wants to turn at a low speed, he/she can apply force to the handle to rotate the leading rod and the front wheel chassis to one side to drive the two front wheels to rotate in the same direction at an angle. Accordingly, it can achieve a smooth turning when traveling at a low speed with a small turning radius.

Description

Double front wheel steering structure

The present invention relates to a double front wheel steering structure, in particular to a double front wheel steering structure suitable for high-speed and low-speed steering to ensure smooth turning and safety.

According to the fact that the scooter is used for leisure sports and transportation purposes, and its structure is light and easy to carry, which is generally favored by the public. Generally, a scooter system is mainly provided with a handle on the frame, a front wheel at the front end of the frame, a rear wheel at the rear end of the frame, and a pedal at the middle of the frame. When using one foot on the pedal, and the other foot on the ground to prop the scooter forward, you can make the scooter slide forward; however, the single front and rear wheel scooter lacks stability in use Sex, easy to fall when traveling.

Therefore, some companies have developed scooters with dual front wheels. Please refer to Taiwan Announcement No. 563580 of "Dual Front Wheel Scooter Steering Control Structure", which includes at least a front fork lever, a connecting seat, a torsion spring, and a connecting rod; The front fork rod is provided with a fixed part for the handle and the frame to be assembled. There are also two protrusions. The protrusions are respectively downwardly provided with a pivot rod, the pivot rod is provided with a ring groove, and the ring groove The side edge is provided with a card groove, and the pivotal rod is provided with a through hole; the connecting seat is pivotally connected to the pivotal rod of the front fork rod, the connecting seat is provided with a receiving groove, and the side edge of the receiving groove A card groove is opened at the accommodating groove, a perforation is provided at the bottom of the accommodating groove, and a connecting block is provided at the front end of the connecting block. A pivot block is provided, and the pivot block is pivotally connected to the wheel; the torsion spring is set in the accommodating groove of the connecting seat, the torsion spring is provided with two ends, and the two ends are respectively fixed to In the slot of the front fork rod and the connecting seat; the connecting rod is pivotally connected to the connecting block of the connecting seat, and the two ends of the connecting rod are respectively provided with through holes.

The Taiwan Announcement No. 563580 "Dual Front Wheel Scooter Steering Control Structure" uses the three-wheel structure formed by its dual front wheels and one rear wheel, which can improve the stability of the scooter when it is moving, and when the scooter wants to turn while it is moving , The user uses the body weight or output to press down on one side of the handle to achieve the left and right steering effect. Of course, using body weight to suppress or press down on the side of the handle to steer the scooter is only suitable for steering when the scooter is traveling at high speed. When the scooter is traveling at low speed, if the body weight is still used to suppress or press down on the handle When the scooter is turned on the side, the scooter may overturn and the user may fall down due to an unstable center of gravity. The Taiwan Announcement No. 563580's "Dual Front Wheel Scooter Steering Control Structure" adopts a double-sided spring return structure. Due to its design, the bilateral spring system is prone to uneven force when in use, which leads to the elastic fatigue of the unilateral spring and the loss of the return effect.

The reason is that, in view of the fact that the existing Taiwan Announcement No. 563580 and other dual-front-wheel scooters still have the above-mentioned shortcomings when steering, they have used their years of manufacturing and design experience and knowledge in related fields to assist, and through many ingenuities, Research and create the present invention.

The present invention relates to a dual-front-wheel steering structure, and its main purpose is to provide a dual-front-wheel steering structure suitable for high-speed and low-speed steering to ensure smooth and safe turning.

In order to achieve the above-mentioned implementation objectives, the inventor of the present invention has developed the following double front wheel steering structure, which includes: an operating unit with a sleeve, and the sleeve is provided with a set of holes along its axial direction, and the sleeve A limit slot hole is provided in the radial direction, and a pole assembly is provided so that the pole assembly is sleeved on The sleeve hole of the sleeve is additionally provided with a limiting pin, and the limiting pin penetrates the limiting slot of the sleeve, and is assembled with the vertical rod assembly, and makes a faucet vertical rod bottom The end is assembled with the upper end of the vertical rod assembly, and the upper end of the faucet vertical rod is equipped with a handle; a steering unit is provided with a front wheel chassis, so that the front wheel chassis is located under the sleeve of the operating unit, and the The bottom end of the vertical rod assembly is assembled with the middle position of the front wheel chassis, and the front wheel chassis is provided with a set of standing parts on two opposite sides of its bottom surface, and a front wheel rocker arm is pivotally connected to each of the two sets of standing parts. A connecting rod is provided between the front wheel rocker arms, and the two ends of the connecting rod are pivotally connected with the two front wheel rockers. The outer side of the two front wheel rockers is connected to a wheel axle, and each of the two wheel axles is connected to a front wheel. .

The double front wheel steering structure as described above, wherein the steering unit further includes an automatic correction module, the automatic correction module includes a center column, and the bottom end of the center column is aligned with the center of the connecting rod It is pivotally connected, and at least one elastic washer is assembled at the upper end of the center column, and the front wheel chassis is provided with a through hole at a position relative to the automatic return module, and the elastic washer at the upper end of the center column passes through the The through hole of the front wheel chassis is made so that the diameter of the elastic washer is larger than the aperture of the through hole, and is in abutting contact with the through hole.

The double front wheel steering structure as described above, wherein the automatic correction module further includes two upper and lower positioning covers, and the elastic washer is clamped and positioned between the two positioning covers, and a locking member is provided , So that the locking member penetrates the two positioning covers and the elastic washer, and is locked and fixed with the upper end of the center column.

The double front wheel steering structure as described above, wherein the rear ends of the two assembly parts of the steering unit are pivotally connected to the upper end of the front wheel rocker arm, and the front wheel rocker arm is formed from the upper end to the bottom end. It is set up obliquely from back to front, so that the bottom end of the front wheel rocker arm is located in front of the upper end of the front wheel rocker arm, and the wheel shaft of the front wheel rocker arm is connected to the outer side of the bottom end of the front wheel rocker arm, and a through the wheel shaft is defined. The ground vertical line is defined as an axial line passing through the axle along the length of the front wheel rocker arm, so that a caster angle is formed between the ground vertical line and the axial line of the front wheel rocker arm.

The dual front wheel steering structure as described above, wherein the two front wheel trains of the steering unit each define a wheel surface centerline passing through the center of the wheel surface, and the other defines two ground vertical lines passing through the two front wheels and its wheel surface, and The two front wheels are respectively inclined to the direction of the leading pole in the middle, so that the distance between the two front wheels is formed in a figure eight shape with a front width and a narrow upper and a lower width, and the center line of the wheel surface of the two front wheels There is a negative camber angle between each and the vertical line of the ground passing through the wheel surface.

The double front wheel steering structure as described above, wherein the negative camber angle of the two front wheels is 4.1-10 degrees.

The dual front wheel steering structure as described above, wherein the operating unit is formed with a connecting portion on one side of the sleeve.

The double front wheel steering structure as described above, wherein the vertical rod assembly of the operating unit is provided with a socket at its upper end, and the bottom end of the faucet vertical rod and the socket of the vertical rod assembly are inserted and assembled correspondingly.

Thereby, when the user wants to turn at high speed, he can use his body weight or output to press down the handle of the faucet pole, so that the two front wheels tilt to one side to achieve the effect of high speed turning. When turning at low speed, you can apply force to the handle to turn the faucet pole and the front wheel chassis to one side to drive the two front wheels to rotate at an angle in the same direction. According to this, a smaller radius of rotation can be used to achieve low speed. Smooth steering effect.

1: Operation unit

11: sleeve

111: Connection Department

112: set hole

113: limit slot

12: Pole assembly

121: jack

13: limit tip

14: Leading pole

141: Handle

2: Steering unit

21: Front wheel chassis

211: Through hole

22: Assembly Department

23: Front wheel rocker arm

231: Axle

24: front wheel

25: connecting rod

26: Auto-return module

261: center pillar

262: Elastic washer

263: positioning cover

264: lock firmware

3: Frame

31: Joint

32: rear wheel

41: Ground plumb line

42: axial line

43: Wheel center line

44: Ground plumb line

θ1: backward angle

θ2: negative camber

Figure 1: The overall perspective view of the present invention

Figure 2: An exploded perspective view of the present invention

Figure 3: Partial enlarged side view of the present invention

Figure 4: Partially enlarged front view of the present invention

Figure 5: A partial enlarged top view of the present invention

Figure 6: A three-dimensional view of the right turning state of the present invention when traveling at high speed

Figure 7: Front view of the present invention turning right when traveling at high speed

Figure 8: The top view of the right turning state of the present invention when traveling at high speed

Figure 9: A perspective view of the present invention in a right-turning state when traveling at low speed

Figure 10: Front view of the present invention turning right when traveling at low speed

Figure 11: The top view of the right turning state of the present invention when traveling at low speed

In order to enable the technical means of the present invention and the effects it can achieve to have a more complete and clear disclosure, the detailed description is as follows, please refer to the figures and figure numbers of the disclosure together: first, please refer to the first and second As shown in the figure, the double front wheel steering structure of the present invention mainly includes: an operating unit (1), including a sleeve (11), and a connecting portion (111) is formed on the rear side of the sleeve (11) , The sleeve (11) is provided with a set of holes (112) along its axial direction, and a limiting slot (113) is provided in the radial direction of the sleeve (11) to communicate with the sleeve (112), There is also a vertical rod assembly (12), which is used to sleeve the vertical rod assembly (12) in the sleeve hole (112) of the sleeve (11), and a limit pin (13) is inserted through the sleeve The limit slot (113) of the barrel (11) is assembled with the pole assembly (12), and a socket (121) is provided at the upper end of the pole assembly (12), and a leading pole is also provided (14), the bottom end of the faucet pole (14) and the socket (121) of the pole assembly (12) are inserted and assembled correspondingly, and a handle ( 141); a steering unit (2) includes a front wheel chassis (21), so that the front wheel chassis (21) is located under the sleeve (11) of the operating unit (1), and the vertical rod assembly (12) ) The bottom end is assembled with the middle position of the front wheel chassis (21), and the front wheel chassis (21) is provided with a set of standing parts (22) on the left and right sides of its bottom surface, and the two standing parts (22) Each backend It is pivotally connected to the upper end of a front wheel rocker arm (23), and the front wheel rocker arm (23) is set up inclined from its upper end to the bottom end, so that the bottom end of the front wheel rocker arm (23) is located at The front wheel rocker arm (23) is in front of the upper end, and the two front wheel rocker arms (23) are respectively connected with an axle (231) on the outside of the bottom end, and each group of the two wheel axles (231) is provided with a front wheel (24), Please also refer to the third figure. It also defines a vertical line (41) passing through the axle (231) and an axial line passing through the axle (231) along the length of the front wheel rocker arm (23) (42), and make a caster angle (θ1) formed between the ground vertical line (41) and the axial line (42) of the front wheel rocker arm (23), using the caster angle (θ1) design can improve the straight line For stability during traveling and turning, a connecting rod (25) is provided between the two front wheel rocker arms (23), and the two ends of the connecting rod (25) are pivotally connected to the two front wheel rockers (23), There is also an automatic return module (26) in front of the connecting rod (25). The automatic return module (26) includes a center column (261), and at least An elastic washer (262). The present invention is provided with two elastic washers (262) stacked on top and bottom. The material of the elastic washer (262) can be made of Eutectic. In addition, two positioning covers (263) are provided to make the Two elastic washers (262) are clamped between the two positioning covers (263), and a locking member (264) is provided to pass through the through holes in the center of the elastic washers (262) and the positioning cover (263), and The lock hole at the upper end of the center column (261) is locked, and the bottom end of the center column (261) is pivotally connected to the center of the connecting rod (25), and the front wheel chassis (21) is relative to the automatic return mold A through hole (211) is provided at the position of the group (26), and the elastic washer (262) of the automatic correction module (26) passes through the through hole (211) of the front wheel chassis (21), and the elastic washer (262) The diameter is larger than the aperture of the through hole (211), and it is in abutting contact with the through hole (211).

Accordingly, when assembling is implemented, the connecting portion (111) of the sleeve (11) of the operating unit (1) of the double front wheel steering structure of the present invention can be combined with the front end of the frame (3) of a scooter The part (31) is fastened and combined with screws, and a rear wheel (3) is attached to the rear end of the frame (3). 2) A three-wheel structure is formed with the left and right front wheels (24) of the present invention, and a hub motor can be assembled on the rear wheel (32) so that the rear wheel (32) is driven by electricity. Please also refer to the fourth figure. The present invention is based on its left and right front wheels (24) each defining a wheel surface centerline (43) passing through the center of the wheel surface, and two respectively passing through the two The vertical line (44) of the front wheel (24) on the ground, and when the two front wheels (24) are in a stationary or straight traveling state, the two front wheels (24) respectively face the leading pole (14) in the middle The two front wheels (24) are relatively inclined so that the distance between the two front wheels (24) is formed from the front view from the front width to the rear narrow (as shown in the fourth figure), and from the top view from the top narrow to the lower width (as shown in the fifth figure) The outer figure eight is set up, and a negative camber (θ2) of about 4.1~10 degrees is formed between the centerline of the wheel surface (43) of the two front wheels (24) and the vertical line (44) passing through the wheel surface. According to this, the scooter can stand steadily when it is at rest, and it can travel steadily when it is traveling, and it can help the flexibility when turning and reduce the risk of overturning when turning.

Here, when the user wants to operate the scooter, he should hold it on the left and right sides of the handle (141) of the operating unit (1), and step on the frame (3) of the scooter. The middle section is set on the pedal, and the other foot is stepped on the ground to prop the scooter forward and make the scooter slide forward. When the scooter slides forward, both feet of the user are placed on the frame (3 ) On the pedal in the middle section, when the speed of the scooter slows down and it will stop, step on the ground with the other foot and prop the scooter forward. Repeated operations to make the scooter move smoothly.

Furthermore, when the user wants to turn to the right while the scooter is traveling at high speed, please refer to Figures 6 to 8 together. The user can use his body weight or output to press the handle (141) of the operating unit (1) ) On the right side, and the faucet rod (14) is deflected to the right, so that the right front wheel (24) can bear a larger weight load, causing the right front wheel (24) to shift to the right, and the left front wheel (24) is It will be synchronized to the right by the linkage of the link (25). When the left and right front wheels (24) shift to the right at the same time, the center post (261) connected with the link (25) will be Tilt to the left, and at the same time, the elastic washer (262) assembled on the upper end of the center column (261) is connected to the bottom of the front wheel The through hole (211) of the disc (21) is in contact with the hole wall, and the elastic washer (262) provided at the upper end of the center column (261) and the through hole (211) of the front wheel chassis (21) can be used to prevent left , The situation of excessive deviation of the front wheels (24) on the right two sides, by which, when the front wheels (24) on the left and right sides shift to the right, the effect of turning the scooter to the right at high speed can be achieved. When the second front wheels (24) complete the turning action and want to restore the second front wheels (24) to travel in a straight line, the user keeps his body upright or releases the pressure on the right side of the handle (141). At this time, by The elastic washer (262) of the center column (261) recovers its elastic force, which can assist in driving the connecting rod (25) and the two front wheels (24) assembled on the front wheel rocker arms (23) at the two ends to return to the positive position. Make the scooter go straight. If you want to turn the scooter to the left when traveling at high speed, you only need to tilt your body weight to the left or push down the left side of the handle (141) to achieve the effect of turning the scooter to the left when traveling at high speed.

In addition, when the user wants to turn to the right when the scooter is traveling at low speed, please refer to the figures 9-11 as well. Apply force to the handle (141) to rotate the faucet pole (14) to the right. The front wheel chassis (21) connected to the faucet pole (14) and its pole assembly (12) is driven to rotate to the right. At this time, the front wheel (24) is assembled on the left and right sides of the front wheel chassis (21). It will deflect to the right. When the left and right front wheels (24) deflect to the right at the same time, the scooter can make a stable turn to the right at a low speed, and use the pole assembly (12) with the leading pole (14) ) The limiting function of the limiting pin (13) and the limiting slot (113) of the sleeve (11) can prevent the left and right front wheels (24) from rotating excessively. When the second front wheel (24) completes the turning action and wants to restore the second front wheel (24) to travel in a straight line, the user only needs to turn the faucet rod (14) to the right to drive the front wheel chassis (21) back to the right, and make the left and right The front wheels (24) on the right two sides return to the positive position so that the scooter travels straight. If you want to turn the scooter to the left at a low speed, you only need to rotate the faucet rod (14) to the left to drive the front wheel chassis (21) and the two front wheels (24) assembled on it to rotate to the left, and To achieve the effect of making the scooter turn left when traveling at low speed.

As a result, the dual front-wheel steering structure design of the present invention can make the scooter travel at high and low speeds. When the scooter is to be turned to the left or right, the stability of the scooter's steering can be maintained without occurrence The scooter overturns or the user falls down due to an unstable center of gravity, etc., to ensure the safety of the scooter during operation. In addition, the dual front-wheel steering structure of the present invention can be used in scooters, as well as scooters, carts, shopping carts, or wheelchairs. Any appropriate changes or modifications made by persons with ordinary knowledge in the technical field can be used. It should be regarded as not departing from the scope of the patent of the present invention.

It can be seen from the above structure and implementation that the present invention has the following advantages:

1. The double front wheel steering structure of the present invention can use the weight or output of the body to press one side of the handle to make the two front wheels tilt to one side when turning at a high speed, achieving a smooth high-speed turning effect.

2. The dual front wheel steering structure of the present invention can rotate the leading rod of the rotating operation unit and the front wheel chassis when turning at a low speed, which can drive the two front wheels to rotate at an angle in the same direction. According to this, the system can smoothly rotate with a smaller radius Steering to ensure stability and safety when turning at low speeds.

3. The double front wheel steering structure of the present invention makes the front wheels on both sides have negative camber angles, and the left and right front wheels are set up in an outer eight shape, thereby improving the stability of the present invention when stationary and traveling, and Improve flexibility when turning to reduce the risk of overturning when cornering.

4. The dual front-wheel steering structure of the present invention forms a caster angle between the two front-wheel rocker arms and the vertical line of the ground passing through the front wheel axle. The design of this caster angle can further improve the stability of straight travel and steering, and Naturally return to the right after steering and reduce the risk of front wheel skidding.

In summary, the embodiments of the present invention can indeed achieve the expected effects, and the specific structure disclosed by it has not been seen in similar products, nor has it been disclosed before the application. It is in full compliance with the provisions of the Patent Law and Requirement, Yan filed an application for a patent for invention in accordance with the law, and pleaded for favor of examination, and granted a patent, it would be more virtuous.

1: Operating unit

11: sleeve

111: Connection Department

112: set hole

113: limit slot

12: Pole assembly

121: jack

13: limit tip

2: Steering unit

21: Front wheel chassis

211: Through hole

22: Assembly Department

23: Front wheel rocker arm

231: Axle

24: front wheel

25: connecting rod

26: Auto-return module

261: center pillar

262: Elastic washer

263: positioning cover

264: lock firmware

Claims (8)

A double front wheel steering structure includes: an operating unit, a sleeve is provided with a set of holes along the axial direction of the sleeve, a limiting slot is provided in the radial direction of the sleeve, and a The upright assembly is so that the upright assembly is sleeved in the sleeve hole of the sleeve, and a limiting pin is additionally provided, and the limiting pin penetrates the limiting slot of the sleeve and is connected to the vertical The rod assembly is assembled and connected, and the bottom end of a faucet pole is assembled with the upper end of the pole assembly, and the upper end of the faucet pole is assembled with a handle; a steering unit is equipped with a front wheel chassis, so that the front wheel The chassis is located under the sleeve of the operating unit, and the bottom end of the vertical rod assembly is assembled with the middle position of the front wheel chassis, and the front wheel chassis is provided with a set of standing parts on two opposite sides of the bottom surface of the front wheel chassis. A front-wheel rocker arm is pivotally connected to each part, and a connecting rod is provided between the two front-wheel rocker arms, and the two ends of the connecting rod are pivotally connected with the two front-wheel rocker arms, and are connected to the outer sides of the two front-wheel rockers. There is a wheel axle, and a front wheel is connected to each of the two wheel axles. The dual front-wheel steering structure of claim 1, wherein the steering unit further includes an automatic correction module, the automatic correction module includes a center column, and the bottom end of the center column is connected to the center of the connecting rod At least one elastic washer is assembled at the upper end of the center column, and the front wheel chassis is provided with a through hole at the position relative to the automatic correction module, and the elastic washer at the upper end of the center column Pass through the through hole of the front wheel chassis, and make the elastic washer have a diameter larger than the aperture of the through hole, and abut against the through hole. According to the double front wheel steering structure of claim 2, wherein the automatic return module further includes two upper and lower positioning covers, and the elastic washer is clamped and positioned between the two positioning covers, and a The locking member makes the locking member pass through the two positioning covers and the elastic gasket, and is locked and fixed with the upper end of the center column. The dual front-wheel steering structure of claim 1, wherein the rear ends of the two standing parts of the steering unit are pivotally connected to the upper end of the front-wheel rocker arm, and the front-wheel rocker arm is moved from the upper end to the bottom end, It is set up obliquely from back to front, so that the bottom end of the front wheel rocker arm is located in front of the upper end of the front wheel rocker arm, and the wheel shaft of the front wheel rocker arm is connected to the outer side of the bottom end of the front wheel rocker arm, and a passage through the The ground vertical line of the axle defines an axial line passing through the axle along the length of the front wheel rocker arm, so that a caster angle is formed between the ground vertical line and the axial line of the front wheel rocker arm. The dual front wheel steering structure of claim 1, wherein the steering unit has two front wheel trains each defining a wheel surface centerline passing through the center of the wheel surface, and two ground vertical lines passing through the two front wheels and its wheel surface respectively , And make the two front wheels relatively inclined toward the leading pole in the middle, so that the distance between the two front wheels is formed in a eight-shaped shape except for the front width and the rear narrow, the upper narrow and the lower width, and the tread of the two front wheels A negative camber angle is formed between the center line and the vertical line of the ground passing through the wheel surface. The dual front wheel steering structure according to claim 5, wherein the negative camber angle of the two front wheels is 4.1 to 10 degrees. According to the dual front-wheel steering structure of claim 1, wherein the operating unit is formed with a joint on one side of the sleeve. The double front wheel steering structure of claim 1, wherein the vertical rod assembly of the operating unit is provided with a jack at its upper end, and the bottom end of the faucet vertical rod and the jack of the vertical rod assembly are inserted and assembled correspondingly .

Images