CN111420385B

CN111420385B - Scooter

Info

Publication number: CN111420385B
Application number: CN201911356837.9A
Authority: CN
Inventors: 瑞哈德·帕舍尔; 涛·史马赫; 克里斯蒂安·赞佐提
Original assignee: Paschel Hands Ltd
Current assignee: Paschel Hands Ltd
Priority date: 2019-04-10
Filing date: 2019-12-25
Publication date: 2021-12-28
Anticipated expiration: 2039-12-25
Also published as: DE102019002634A1; CN111420385A; DE102019002634B4; CN212038933U

Abstract

The invention relates to a scooter with a pedal, at least one rear wheel and two steerable front wheels mounted on a front axle, wherein the front axle is mounted on a rotatable plate connected to the pedal by means of a connecting block, wherein a first eccentric disc having a toothed profile with teeth and flanks which mesh with correspondingly shaped teeth and flanks of a second eccentric disc is fastened to the plate, wherein the second eccentric disc has on its top side and on its bottom side a toothed profile with teeth and flanks which are inclined in opposite circumferential directions, wherein the teeth and flanks mesh with the teeth and flanks of a third eccentric disc on the bottom side of the second eccentric disc, and wherein the three eccentric discs are connected to the connecting block by means of screws. Particularly precise steering can be achieved by the inclination of the tooth flanks.

Description

Scooter

Technical Field

The invention relates to a convertible scooter. And in particular to a steering device for such a scooter, also generally referred to as a skateboard. But according to the invention it may also be referred to herein as a scooter.

Background

DE 202008006764U 1 describes a scooter with a handle element as a steering member for the wheels, which are arranged in a rotatable manner about a steering axis transverse to their axis in the steering movement of the scooter.

DE 202010010305U 1 shows a scooter with a top cover serving as a bearing surface as well as two tilt-activated steering axles and four wheels.

Disclosure of Invention

The invention aims to provide a scooter with a precise steering device.

The solution of the present invention to achieve the above object is: scooter with a pedal, at least one rear wheel and two steerable front wheels supported on a front axle, wherein the front axle is mounted on a rotatable plate connected with the pedal by means of a connecting block, wherein a first eccentric disc with a sawtooth-shaped profile with teeth and flanks is fastened on the plate, which teeth and flanks mesh to correspondingly shaped teeth and flanks of a second eccentric disc, wherein the second eccentric disc has on its top side and on its bottom side a sawtooth-shaped profile with teeth and flanks inclined in opposite circumferential directions, wherein the teeth and flanks mesh on the bottom side of the second eccentric disc with teeth and flanks of a third eccentric disc, and wherein the three eccentric discs are connected with the connecting block by means of bolts.

Preferably, a spring element is mounted between the third eccentric disc and the connecting block.

Preferably, the spring element is connected to the connecting piece by means of a conical disk.

Preferably, the first eccentric disc is connected to a flange plate, which is connected to the plate element, in a rotationally fixed manner by means of a centering pin.

Preferably, the connecting block has a shape such that an axis perpendicular to the plate member is inclined at an angle α with respect to the pedal.

Preferably, the flange plate is supported by means of a cylindrical section thereof in a plate central opening of the plate, thereby forming a deflection axis for the front axle.

Preferably, the three eccentric disks have teeth and flanks which are distributed uniformly in the circumferential direction, wherein each unit of one tooth and one flank extends over a circumferential angle of 60 °.

Preferably, the range of rotation of the plate relative to the pedal is limited to a maximum of 60 °.

Preferably, the position of the front axle of the wheel is adjustable relative to the plate member.

Preferably, the spring element is made of an elastomer.

The invention has the beneficial effects that: the scooter with the pedal and the two steerable front wheels is characterized in that the plate of the front shaft is connected with the pedal through a connecting block. By means of three eccentric discs with a saw-tooth profile, the plate can be deflected about a rotational axis by tilting the footplate and the connecting piece, in order to execute a turning movement about its longitudinal axis by tilting the footplate. A particularly precise steering can thus be achieved by the inclination of the tooth flanks.

Drawings

FIG. 1 is a side view of a scooter having a steering apparatus of the present invention;

FIG. 2 is a bottom oblique view of the scooter shown in FIG. 1;

FIG. 3 is a top oblique view of the steering apparatus shown in FIGS. 1 and 2;

fig. 4 is an exploded view of the front axle of the scooter of the present invention.

In the figure: 1. pedal, 2, front area, 3, road surface, 4, front wheel, 5, front wheel, 6, plate, 7, rear wheel, 8, rotation axis, 10, connection block, 12, axis, 13, pin, 14, axis holder, 15, slot, 16, flange plate, 17, screw, 18, screw, 19, connection face, 20, threaded bore, 21, bearing, 22, sleeve, 23, nut, 24, nut, 25, washer, 26, plate central opening, 27, hole, 28, threaded bore, 29, 30, first eccentric disc, 31, centering pin, 32, flange plate opening, 33, protruding tooth, 34, tooth face, 35, second eccentric disc, 36, tooth face, 37, tooth, 38, tooth face, 39, tooth, 40, third eccentric disc, 41, tooth face, 42, tooth, 43, ridge, 44, internal thread, 45, flange plate central opening, 46, spring element, 47, central bore, 48. conical disk, 49, connecting block center bore.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments with reference to the accompanying drawings.

Example 1:

the scooter shown in fig. 1 has a footboard 1 which is slightly bent upwards from the road surface 3 in a front region 2. Two front wheels 4 and 5 are mounted on the pedal 1, said wheels being fixed to a plate 6 by means of pivots. The two front wheels 4 and 5 are, as the name implies, located in the front region of the pedal 1 with respect to the normal direction of travel. A single rear wheel 7 is mounted on a rear region of the pedals 2. It should be noted, however, that two rear wheels may also be mounted.

A steering device is mounted on the pedal 1, which connects the pedal 1 with the plate 6 and enables the plate 6 to rotate together with the front wheels 4 and 5 relative to the pedal 1.

As will be explained in more detail below, the steering device is operated by tilting the pedals 1 about their longitudinal axes, thereby rotating the steering device about the axis of rotation 8. The inclination of the pedals 1 and the angle alpha between the road surface 3 and the axis of rotation 8 are coordinated with each other in such a way that always the two front wheels 4 and 5 come into contact with the road surface 3.

The steering device is fixed to the front region 2 of the pedal 1 by means of a connecting piece 10, wherein the connecting piece 10 defines the angle α mentioned above. The plate 6, to which the axles 12 of the front wheels 4 and 5 are connected, is coupled with a connecting block 10. The other parts of the steering device are connected to the connecting piece 10 by means of a pin 13, wherein the pin 13 also forms the axis of rotation. Further details are described in connection with fig. 4.

Fig. 3 shows the front axle with wheels 4 and 5, which are connected to the plate element 6 here by means of axle holders 14. The shaft holder 14 is screwed with the plate 6 through the elongated hole 15 to adjust the relative positions of the wheels 4 and 5 with respect to the plate 6. The basic elements of the steering device are connected to the plate 6 by means of a flange plate 16, more precisely by means of four screws 17, only three of which are shown in fig. 3. In general, this steering device is held by the pin 13 shown in fig. 2 and by a screw 18 which is inserted into the connecting block 10 and screwed into the pin 13. The connection face 19 of the connection block 10 is screwed to the bottom side of the scooter 1, specifically, by means of a threaded bore hole 20 and screws not shown here.

The axles 12 of the front wheels 4 and 5 are held on the pedals 1 by means of axle holders 14, said front wheels being fixed to the axle holders 14 by means of

nuts

23 and 24 via bearings 21 and sleeves 22. If necessary, one of the

nuts

23, 24 can also be provided with a washer 25. The plate 6 has a plate central opening 26 into which the flange plate 16 is inserted, said flange plate resting with its flange plate on the top side of the plate 6 and being fixed by four screws 17 which project through holes 27 of the flange plate and are screwed into threaded bores 28 of the plate 6. On the underside of the plate part 6, a first eccentric disc 30 is provided, which first eccentric disc 30 is flat on its top side facing the plate part 6 and has a centering pin 31 which projects from the top side and projects into an opening 32 of the flange plate, so that the first eccentric disc 30 is held in a rotationally fixed manner relative to the plate part 6 and the flange plate.

The first eccentric disc 30 has, on its bottom side facing away from the plate 6, a plurality of sawtooth-shaped projecting teeth 33 which are arranged in a distributed manner around the circumference. In the specific embodiment, six such projecting teeth 33 are provided, and therefore, these projections are respectively offset by 60 ° with respect to each other in the circumferential direction. The rake angle of the tooth face 34 of the projecting tooth 33 is 30 °, and 32 ° in the specific embodiment. The tooth surface 34 rises counterclockwise as viewed from below looking up at the projecting tooth 33.

Below the first eccentric disc 30, a second eccentric disc 35 is arranged, which is serrated on both the top and bottom sides, wherein the flanks of the teeth have opposite lead directions in the circumferential direction, i.e. on the top side facing the first eccentric disc 30, the flanks 36 and the teeth 37 are oriented in such a way that they mesh exactly with the flanks 34 and the projecting teeth 33 of the first eccentric disc 30, while the flanks 38 and the teeth 39 have opposite rotational directions on the bottom side facing away from the first eccentric disc 30, i.e. here, for example, have a clockwise rising flank 38.

Below the second eccentric disk 35, a third eccentric disk 40 is arranged, which likewise has tooth flanks 41 and teeth 42 matching the teeth 39 and the tooth flanks 38 on the underside of the second eccentric disk 35.

On the bottom side of the third eccentric disc 40 a pin 13 is mounted, which protrudes through an opening of the third eccentric disc 40 and has on its lower end a bulge 43, which can be supported on the bottom side of the third eccentric disc 40. The pin 13 has an internal thread 44 on its other end, into which the screw 18 is screwed.

A spring element 46 having a central bore 47 through which the pin 13 passes is inserted into the flange plate central opening 45 of the flange plate 16. The outer contour of the spring element 46 is slightly conical. The material of the spring element 46 is preferably a polymer, the hardness, material thickness and bending properties of which can be individually selected in order to enable a versatile and precise adjustment of the dynamic driving properties. Due to these properties, polymer shafts are particularly suitable for lighter drivers or children. In this case you can take a smaller turning radius and go back straight again faster. It is noted that other spring elements, such as coil springs, may also be used.

Above the spring element 46, a conical disk 48 is arranged, to which the spring element 46 partially engages and tensions the cone of the conical disk.

The connection block 10 having the connection block center bore 49 extending in the longitudinal direction of the common rotation shaft 8 is screwed with the internal thread 44 of the pin member 13 by a screw 18. In this way, the entire front axle is completely assembled. The connection block 10 may be screwed with a vehicle, such as the pedal 1, through a threaded bore 20.

If the driver deflects the pedal about its longitudinal axis by weight deflection, the plate together with the two wheels 4 and 5 is deflected about the axis of rotation 8 on the basis of the tooth flanks on the

eccentric discs

30, 35 and 40, so that the pedal is steered. In this case, the spring element 46 is tensioned, which generates a return force for straight travel once the scooter is aligned again with the rider. In this case, the first pair of teeth and flanks of the first and second

eccentric discs

30 and 35 are active in one direction during turning, while the second pair of teeth and flanks of the second and third

eccentric discs

35 and 40 are active in the opposite direction for turning. Particularly precise steering can be achieved by the inclination of the tooth flanks.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.

Claims

1. Scooter with pedals (1), at least one rear wheel (7) and two steerable front wheels (4, 5) supported on a front axle (12), characterized in that: wherein the front axle is mounted on a rotatable plate (6) connected to the footplate (1) by a connecting block (10), wherein a first eccentric disc (30) having a sawtooth-shaped profile with projecting teeth (33) and tooth flanks (34) is fastened to the plate (6), the teeth and flanks meshing to correspondingly shaped teeth (37) and flanks (36) of the second eccentric disc (35), wherein the second eccentric disc (35) has a sawtooth-shaped profile on both its top side and its bottom side with teeth (37, 39) and flanks (36, 38) which are inclined in opposite circumferential directions, wherein the teeth (39) and flanks (38) on the bottom side of the second eccentric disc (35) mesh with the teeth (42) and flanks (41) of the third eccentric disc (40), and wherein the three eccentric discs (30, 35, 40) are bolted together with the connecting block (10); a spring element (46) is mounted between the third eccentric disc (40) and the connecting block (10); the outer contour of the spring element (46) is slightly conical, and the spring element (46) is connected with the connecting block (10) through a conical disc (48).

2. The scooter of claim 1, wherein: the first eccentric disc (30) is connected in a rotationally fixed manner to a flange plate (16) which is connected to the plate (6) by means of a centering pin (31).

3. The scooter of claim 1, wherein: the connecting piece (10) has a shape such that the axis of rotation (8) perpendicular to the plate (6) is inclined at an angle (alpha) with respect to the footplate (1).

4. Scooter according to claim 2, characterized in that the flange plate (16) is supported with its cylindrical section in a plate central opening (26) of the plate (6), thereby forming a deflection axis for the front axle (12).

5. The scooter of claim 1, wherein: the three eccentric disks (30, 35, 40) have teeth and flanks which are distributed uniformly in the circumferential direction, wherein each unit of one tooth and one flank extends over a circumferential angle of 60 °.

6. The scooter of claim 1, wherein: the range of rotation of the plate (6) relative to the pedal (1) is limited to a maximum of 60 °.

7. The scooter of claim 1, wherein: the position of the front axle (12) of the front wheel (4, 5) can be adjusted relative to the plate (6).

8. The scooter of claim 1, wherein: the spring element (46) is made of an elastomer.