阅读说明：本技术 轮子保持器 (Wheel retainer ) 是由 斯特凡妮·彼得斯 特伦达菲尔·伊尔切夫 克里斯汀·瓦格曼 克劳迪娅·霍夫曼 于 2019-08-22 设计创作，主要内容包括：本发明涉及一种用于紧固到轮子(1)、尤其是紧固到机动车辆的轮子(1)上的轮子保持器(2),该轮子保持器(2)包括至少两个臂(22,23,24),臂(22,23,24)从轮子保持器(2)的中心(28)沿径向方向向外延伸。臂(22,23,24)中每一个具有沿径向方向可移动的至少一个可移动元件(32,33,34)。轮子保持器(2)包括锁定元件(82),该锁定元件(82)被设计成使得可以通过致动锁定元件(82)将可移动元件(32,33,34)固定成使得可移动元件(32,33,34)不再沿径向方向可移动。轮子保持器(2)还包括解锁元件(84),该解锁元件(84)被设计成使得可以通过致动解锁元件(84)来释放可移动元件(32、33、34)的固定。(The invention relates to a wheel holder (2) for fastening to a wheel (1), in particular to a wheel (1) of a motor vehicle, which wheel holder (2) comprises at least two arms (22, 23, 24), which arms (22, 23, 24) extend outwards in a radial direction from the centre (28) of the wheel holder (2). Each of the arms (22, 23, 24) has at least one movable element (32, 33, 34) movable in a radial direction. The wheel holder (2) comprises a locking element (82), which locking element (82) is designed such that the movable element (32, 33, 34) can be fixed such that the movable element (32, 33, 34) is no longer movable in the radial direction by actuating the locking element (82). The wheel holder (2) further comprises an unlocking element (84), which unlocking element (84) is designed such that the fixing of the movable element (32, 33, 34) can be released by actuating the unlocking element (84).)

1. A wheel holder (2) for fastening to a wheel (1), in particular to a wheel (1) of a motor vehicle, the wheel holder (2) comprising:

at least two arms (22, 23, 24), said arms (22, 23, 24) extending outwards in a radial direction; each of said arms (22, 23, 24) having at least one movable element (32, 33, 34), said movable element (32, 33, 34) being movable in said radial direction and provided for being supported on said wheel (1);

a locking member (82), the locking member (82) being designed such that the movable element (32, 33, 34) can be clamped against the wheel (1) by operating the locking member (82), and the movable element (32, 33, 34) can be fixed such that the movable element (32, 33, 34) no longer moves in the radial direction, thereby fixing the wheel adapter on the wheel; and

an unlocking member (84), the unlocking member (84) being designed such that the fixation of the movable element (32, 33, 34) can be released by operating the unlocking member (84).

2. The wheel holder (2) according to claim 1, comprising a movable locking mechanism (72), the locking mechanism (72) being coupled to the locking member (82) such that the locking mechanism (72) can be moved into a locking position by operating the locking member (82), in which locking mechanism (72) clamps the movable element (32, 33, 34) against the wheel (1) and fixes the movable element (32, 33, 34) in a tensioned position.

3. A wheel holder (2) for attachment to a wheel (1), in particular to a wheel (1) of a motor vehicle, the wheel holder (2) comprising:

at least two arms (22, 23, 24), said arms (22, 23, 24) extending outwards in a radial direction; each of said arms (22, 23, 24) having at least one movable element (32, 33, 34), said movable element (32, 33, 34) being movable in said radial direction and provided for being supported on said wheel (1); and

a movable locking mechanism (72), the locking mechanism (72) being movable into a locked position in which it clamps the movable element (32, 33, 34) against the wheel (1) and fixes the movable element (32, 33, 34) in a tensioned position.

4. The wheel holder (2) according to claim 3,

comprises a locking member (82), the locking member (82) being designed to enable the locking mechanism (72) to be moved into the locking position by operating the locking member (82); and

comprising an unlocking member (84), the unlocking member (84) being designed such that the fixation of the movable element (32, 33, 34) can be released by operating the unlocking member (84).

5. The wheel holder (2) according to any one of claims 1, 2 or 4, comprising a carrying handle (10) for carrying the wheel holder (2), wherein at least one of the locking member (82) and the unlocking member (84) is formed in or on the carrying handle (10).

6. The wheel holder (2) according to claim 5, wherein the carrying handle (10), the locking member (82) and/or the unlocking member (84) are designed such that the locking member (82) and/or the unlocking member (84) are easy to operate for both left-handed and right-handed operators.

7. The wheel holder (2) according to any of claims 2 to 6, wherein the locking mechanism (72) is pivotable into the locked position.

8. The wheel holder (2) according to any one of claims 2 to 7, wherein the wheel holder (2) comprises a toothed element (68), the toothed element (68) being mechanically coupled to the movable element (32, 33, 34), and wherein the locking mechanism (72) has a toothed portion (74), the toothed portion (74) being in engagement with the toothed element (68) when the locking mechanism (72) is in the locking position.

9. The wheel holder (2) according to claim 8, wherein at least one of the toothed member (68) and the locking mechanism (72) has an arcuate or circular shape.

10. The wheel holder (2) according to any of claims 2 to 9, wherein the locking mechanism (72) is at least partially elastic.

11. The wheel holder (2) according to any of claims 2 to 10, wherein the locking mechanism (72) is coupled to the locking member (82) by a cable (80) or hydraulically.

12. The wheel holder (2) according to any one of the preceding claims, comprising a locking member securing mechanism (88), the locking member securing mechanism (88) being designed to secure the locking member (82) in a locked position.

13. The wheel holder (2) according to any of the preceding claims, comprising a spring element (86), the spring element (86) being designed to move the locking member (82) into an initial position in which the movable element (32, 33, 34) is not fixed.

Technical Field

The present invention relates to a wheel holder or wheel clamp, in particular for wheel alignment measurements, which can be attached to a wheel of a vehicle, in particular a motor vehicle.

Background

For wheel alignment measurements, wheel holders are typically mounted, which are adapted to support sensors and/or measurement markers ("targets") on the vehicle wheel to be measured for wheel alignment. Handling of such wheel holders, particularly attaching and detaching them to and from the wheels of a vehicle, is complicated and difficult.

As an example of a wheel holder resting on the tyre of a wheel, the following steps are necessary:

-transporting the gripper from the storage position to the wheel;

-adjusting the holder to substantially the wheel diameter such that the diameter of the wheel holder is larger than the wheel diameter and smaller than the diameter of the wheel housing;

-applying, correctly positioning and manually fixing the wheel holder on the wheel, so that the wheel holder does not fall off; and

-tensioning the gripping arm of the wheel gripper so that the wheel gripper is firmly attached to the wheel during the measurement.

The following factors reduce the ease and speed of installation:

no dedicated gripping or carrying handle is provided;

attachment can only be performed using two hands, since

1. The wheel holder must be held to the wheel with at least one hand at all times, otherwise the wheel holder will fall off and the other hand will be required for tensioning and securing, or

2. One-handed operation is possible, but the hand position must be changed for tensioning, or

3. Two hands are required for proper positioning and clamping of the arm, with one hand also being required for operation of the locking lever.

Furthermore, there is always a risk that the measurement results of the wheel alignment measurements are tampered with due to incorrect and/or inaccurate attachment of the wheel holder.

The object of the present invention is to simplify the attachment and detachment of a wheel sub-holder to and from the wheel of a vehicle and to reduce the risk of incorrect and/or inaccurate attachment.

Disclosure of Invention

According to one embodiment of the invention, a wheel holder provided for fastening to a wheel, in particular to a wheel of a motor vehicle, comprises at least two arms which extend outwards in a radial direction from the centre of the wheel holder. Each arm has at least one movable element which is movable in the radial direction, so that the length of the arm in the radial direction can be varied. The wheel holder further comprises a locking member designed such that the movable element can be fixed by operating the locking member in such a way that the movable element no longer moves in the radial direction and is also clamped against the wheel, and an unlocking member designed such that the fixing of the movable element can be released by operating the unlocking member.

In particular, the locking member and the unlocking member are formed separately from each other, i.e. as two members separate from each other.

In one embodiment, the wheel holder comprises at least one carrying handle provided for carrying the wheel holder. In one embodiment, at least one of the locking member and the unlocking member is formed in or on the carrying handle. The locking mechanism operates by means of a locking member and an unlocking member, which securely clamps the holder to the wheel. In particular, the locking member and the unlocking member are provided in the vicinity of the operating position, so that the hand position does not have to be changed.

Handling of the wheel holder can thus be significantly simplified.

A wheel holder designed in accordance with an embodiment of the present invention enables true one-handed operation.

The carrying handle with the locking and unlocking members is particularly designed such that the gripper can be handled and attached to the wheel with both the right and the left hand. Thus, the wheel holder is equally suitable for right-handed and left-handed persons.

In one embodiment, it is possible to initially adjust the wheel holder to approximately the wheel diameter so that the diameter of the wheel holder is slightly larger than the diameter of the wheel, yet the wheel adapter can still be inserted into the wheel arch. The movable elements of the wheel holder are coupled such that they move in synchronism with each other. That is, by moving one of the movable elements, the diameter of the wheel holder changes symmetrically with respect to the center of the wheel holder.

The wheel holder according to the embodiment of the present invention can be easily and firmly attached to the wheel by operating the locking member, and can be easily and quickly released from the wheel by operating the unlocking member. The locking member and the unlocking member can each be easily operated with only one hand. With the wheel holder according to the invention, no second hand is required to achieve a high precision alignment of the holder on the wheel.

In one embodiment, the wheel holder comprises a locking device having at least one movable locking mechanism coupled with the locking member such that by operating the locking member the locking mechanism can be moved into a locking position in which the locking mechanism also clamps the movable element against the wheel and fixes the movable element in this position such that the movable element is no longer moved in the radial direction. In this way, the movable element can be clamped against the wheel and fixed in this position in a particularly simple and reliable manner.

In one embodiment, the locking mechanism may be pivoted into a locked position. The pivotably supported locking mechanism can be moved into the locking position in a particularly easy manner by the locking member.

In one embodiment, the wheel holder has a toothed element mechanically coupled to the movable element, and the locking mechanism has a toothed portion that engages the toothed element when the locking mechanism is in the locked position. In this way, the movable element can be fixed particularly reliably by moving the locking mechanism into the locking position.

In one embodiment, at least one of the toothed element and the locking mechanism has an arcuate or circular shape. In this manner, by pivoting the locking mechanism, the toothed element and the toothed portion of the locking mechanism can effectively engage one another.

In an alternative embodiment, the locking mechanism is formed without a toothed portion. In this case, instead of the toothed element, a toothless fixing element is provided which can, for example, grip or catch with a toothless fixing element of the locking mechanism in order to fix the movable element.

The locking mechanism may in particular comprise an eccentric element which can be moved against the circular fixing element and can be jammed with the fixing element.

In one embodiment, the locking mechanism is at least partially resilient. In particular, the locking mechanism is designed such that the toothed part of the locking mechanism can yield (slightly). In the case of an at least partly elastic locking mechanism, the toothed part of the locking mechanism may (slightly) yield when the toothed part of the locking mechanism and the toothed part of the toothed element are arranged in a position which is not good in relation to each other, wherein there is a risk that the locking mechanism and the toothed element mutually block each other. In particular, the teeth of the elastic toothed portion, which may cause blocking in the inelastic locking mechanism, may slide into the adjacent tooth gaps of the opposite toothed portion. In this way, undesired blocking of the toothed section, which would impair the function of the locking device, can be avoided.

In one embodiment, the locking mechanism is mechanically coupled to the locking member by a cable (Bowden cable). The cable provides a reliable, inexpensive and easy to operate mechanical coupling between the locking mechanism and the locking member.

In an alternative embodiment, the locking mechanism is hydraulically coupled to the locking member. By means of the hydraulic coupling, a non-linear connection between the locking mechanism and the locking member can be achieved in a simple manner.

In one embodiment, the wheel holder includes a locking member securing mechanism designed to secure the locking member in a locked position. In this way, the fixation of the movable element can be maintained when the operator's hand is removed from the locking member.

In one embodiment, the wheel holder comprises a resilient element (spring element) designed to move the locking member and the locking mechanism into an initial position in which the movable element is not fixed. Such a spring element may further simplify handling of the wheel holder, since the locking member does not have to be manually moved to its initial position.

Embodiments of a wheel holder according to the present invention will be described in more detail with reference to the accompanying drawings.

Drawings

Figure 1 shows a schematic view of a wheel with a wheel holder attached to the wheel.

Fig. 2 and 3 each show a perspective view of a wheel holder according to an embodiment of the invention.

Fig. 4 shows an embodiment of a rotating elastic element in a schematic perspective view.

Fig. 5 shows the rotating elastic element in the mounted state.

Fig. 6 shows an enlarged view of a locking device according to an embodiment of the invention.

Fig. 7 shows a first embodiment of a locking member according to an embodiment of the invention.

Fig. 8 shows a second embodiment of a locking member according to an embodiment of the invention.

Detailed Description

Fig. 1 shows a schematic view of a wheel 1 together with a wheel holder 2, the wheel holder 2 being mounted on the wheel 1 and having an object 3 attached thereto.

Fig. 2 and 3 each show a perspective view of a wheel holder or wheel clamp 2 according to an exemplary embodiment of the invention.

The wheel holder 2 comprises a housing 4, the housing 4 having a base plate 6 and three side walls 8, the three side walls 8 extending orthogonally from an edge of the base plate 6 in the same direction. The wheel holder 2 has several carrying handles 9, 10 for facilitating handling of the wheel holder 2.

The central axis 30 extends through the central portion (center) 28 of the substrate 6 orthogonal to the substrate 6. Three arms 22, 23, 24 extend radially outwardly from a center 28 of the base plate 6 through openings 7, which openings 7 are formed between the side walls 8. The arms 22, 23, 24 extend substantially parallel to the plane of the base plate 6.

The arms 22, 23, 24 each comprise a fixed inner element 32b, 33b, 34b near the center and a movable outer element 32a, 33a, 34a, which movable outer element 32a, 33a, 34a is movable in a radial direction along the corresponding inner element 32b, 33b, 34 b. The length of the arms 22, 23, 24 in the radial direction can thus be varied by moving (in particular sliding) the outer element 32a, 33a, 34a along the inner element 32b, 33b, 34 b.

At the outer end of the outer element 32a, 33a, 34a facing away from the central axis 30, a claw 12, 13, 14 is formed, which claw 12, 13, 14 extends substantially at right angles to the arm 22, 23, 24. When the wheel holder 2 is attached to the wheel 1 (see fig. 1), the claws 12, 13, 14 are designed to rest on the tire surface of the wheel 1, not shown in fig. 2 and 3.

By moving the outer elements 32a, 33a, 34a outwards in the radial direction, the length of the arms 22, 23, 24 can be extended such that the wheel holder 2 can be easily attached to the wheel 1 in the axial direction of the wheel 1. By moving the outer elements 32a, 33a, 34a inwards the arm length can be shortened in order to secure the wheel holder 2 to the wheel 1, as shown in fig. 1.

The wheel holder 2 according to the exemplary embodiment of the present invention further includes a central rotating element 40, the central rotating element 40 being attached to the central shaft 30 in the center 28 of the base plate 6 such that the central rotating element 40 can rotate around the central shaft 30. The rotating element 40 extends in a plane oriented substantially parallel to the plane of the base plate 6.

Each of the movable elements 32a, 33a, 34a is connected to the rotating element 40 by a respective coupling element 52, 53, 54. The coupling elements 52, 53, 54 are each movably connected to the rotating element 40 and the movable element 32a, 33a, 34a, such that the coupling elements 52, 53, 54 can pivot relative to the rotating element 40 and the movable element 32a, 33a, 34a in a plane extending parallel to the plane of the base plate 6.

The coupling elements 52, 53, 54 convert a rotational movement of the rotating element 40 around the central axis 30 into a translational movement of the movable elements 32a, 33a, 34a in radial direction. Thus, by rotating the rotating element 40 around the central axis 30, the movable elements 32a, 33a, 34a are made movable in radial direction along the inner elements 32b, 33b, 34b, so as to vary the length of the arms 22, 23, 24.

By means of the rotating element 40 and the coupling elements 52, 53, 54, the movable elements 32a, 33a, 34a of the arms 22, 23, 24 are coupled to each other such that when one of the movable elements 32a, 33a, 34a moves, all movable elements 32a, 33a, 34a move synchronously with each other. Thus, the diameter of the wheel holder 2, defined by the distance between the jaws 12, 13, 14, can be preset in a simple manner by moving one of the movable elements 32a, 33a, 34a, so that the wheel holder 2 can be easily applied to the wheel 1, in particular with only one hand.

In the exemplary embodiment shown in fig. 2 and 3, the coupling elements 52, 53, 54 are designed as coupling rods. The coupling elements 52, 53, 54 can also have different shapes, as long as they fulfil the aforementioned function of converting the rotary motion of the rotary element 40 into a translational motion of the movable elements 32a, 33a, 34 a.

In the exemplary embodiment shown in fig. 2 and 3, the rotating element 40 is formed with three rotating element arms (projections) that extend radially outward from a central portion of the rotating element 40 on the central shaft 30. The coupling elements 52, 53, 54 are each pivotably connected to one of the outer portions of the swivel element arm. With this configuration of the rotating element 40, mechanical translation can be achieved with little material usage, which increases the distance the movable elements 32a, 33a, 34a move in the radial direction when the rotating element 40 rotates a predetermined angle around the central axis 30.

However, the rotating element arms/protrusions of rotating element 40 shown in the figures are not an essential feature of the present invention. The rotary element 40 may also be in the form of, for example, an arc-shaped (in particular circular or oval) disc or an angular (for example triangular or square), circular disc.

The rotating element 40 is biased by a rotating elastic element 60 (see fig. 4) in such a way that the movable elements 32a, 33a, 34a are pulled "inwards", i.e. in a direction towards the central shaft 30, by the coupling elements 52, 53, 54. The rotating elastic element 60 is not visible in fig. 2 and 3, because it is arranged between the base plate 6 and the rotating element 40 and is covered by the rotating element 40.

Fig. 4 shows an exemplary embodiment of a rotating elastic element 60 in a perspective schematic view.

Fig. 5 shows the rotary elastic element 60 in the mounted state. The rotating element 40 is not shown in fig. 5 to allow a clear illustration of the rotating elastic element 60.

In the exemplary embodiment shown in fig. 4 and 5, the rotating elastic element 60 is in the form of a helical spring 60 which extends outwardly in a helical shape starting from the axis 30.

The curved ends 62, 64 of the coil spring 60 are connected to the rotary member 40 and the shaft 30 or the base plate 6, respectively, such that when the rotary member 40 rotates about the shaft 30, the rotary member 40 tensions and relaxes the coil spring 60.

The rotary elastic element 60 is designed and mounted such that the rotary elastic element 60 drives the rotary element 40 in such a way that the movable elements 32a, 33a, 34a are pulled by the rotary elastic element 60 in a direction towards the center 28. Thus, the length of the arms 22, 23, 24 is minimized and the wheel holder 2 is fixed to the wheel 1 by the elastic tensioning force of the rotating elastic element 60, which is transmitted to the jaws 12, 13, 14 via the rotating element 40, the coupling elements 52, 53, 54 and the movable elements 32a, 33a, 34 a.

The movable elements 32a, 33a, 34a can be moved outward by muscular power against the force of the rotating elastic element 60 to extend the arms 22, 23, 24 so that the wheel holder 2 can be conveniently attached to or removed from the wheel 1. Due to the spring force generated by the rotating spring element 60, the wheel holder 2 automatically adapts to different dimensions (diameter D) of the wheel 1 in the radial direction within the range of movement (maximum path length) of the outer element 32a, 33a, 34 a. Thus, the wheel holder 2 according to the invention can easily be attached to wheels 1 of different sizes.

An outer circumference of the ring-shaped toothed member 68 around the rotary elastic member 60 has outer teeth 66 formed thereon. The toothed member 68 is non-rotatably connected to the rotating member 40 such that the toothed member 68 and the rotating member 40 can only rotate together about the central shaft 30.

The external teeth 66 may be formed across the entire outer circumference of the toothed member 68 (see fig. 5) or only a partial area across the outer circumference of the toothed member 68 (see fig. 6).

The toothed element 68 with the external toothing 66 is part of a locking device 70, which will be described in more detail below with reference to fig. 6 and 7.

In addition to the toothed element 68, the locking device 70 includes a locking mechanism 72, the locking mechanism 72 being pivotably attached to a locking mechanism shaft 79, the locking mechanism shaft 79 extending orthogonally from the base plate 6 of the wheel holder 2.

The locking mechanism 72 can pivot in a plane oriented parallel to the base plate 6. The pivoting range of the lock mechanism 72 is limited by two limiting members (limiting bolts) 75.

At a first end shown on the right side of fig. 5 and 6, the locking mechanism 72 comprises a toothed portion 74, the parameters of the toothed portion 74 corresponding to the parameters of the outer teeth 66 of the toothed element 68, such that the toothed portion 74 of the locking mechanism 72 can mesh with the outer teeth 66.

At an opposite second end 76, shown on the left side of fig. 5 and 6, the locking mechanism 72 is coupled to a first spring element 78. The first spring element 78 is fastened to the base plate 6 by means of a spring element bolt 79. The first spring element 78 is designed to pull the locking mechanism 72 to the initial position shown in fig. 5 and 6.

When the locking mechanism 72 is in the initial position, the toothed portion 74 of the locking mechanism 72 does not engage the outer teeth 66 of the toothed member 68. Thereby, the rotary element 40 can be rotated, and the outer elements 32a, 33a, 34a coupled with the rotary element 40 can be freely moved in the radial direction.

Due to the coupling established by the coupling elements 52, 53, 54 and the rotating element 40, the outer elements 32a, 33a, 34a move synchronously with each other. Thus, the distance of the claws 12, 13, 14 from the center can easily be adapted to the diameter D of the wheel 1 to which the wheel holder 2 is attached, the distance of the claws 12, 13, 14 from the center defining half the diameter (radius) of the wheel holder 2.

Further, a cable (Bowden cable) 80 is mounted on the second end 76 of the locking mechanism 72, which allows the locking mechanism 72 to be pivoted about a locking mechanism shaft 79 about a locking member 82 (see fig. 7 and 8) from an initial position shown in fig. 6 to a locking position in which the toothed portion 74 of the locking mechanism 72 engages with the outer teeth 66 of the toothed element 68. This engagement prevents rotation of the rotating element 40. Thus, the outer elements 32a, 33a, 34a of the arms 22, 23, 24 no longer move in the radial direction and firmly fix the wheel holder 2 on the wheel 1, these arms 22, 23, 24 being coupled to the rotating element 40 by means of the coupling elements 52, 53, 54.

Instead of the cable 80, a hydraulic system (not shown in the figures) may also be provided, allowing the locking mechanism 72 to be moved from the initial position to the locked position by actuation of the locking member 82.

The toothed portion 74 is elastic due to a free space 77 formed in the lock mechanism 72 between the toothed portion 74 and the lock mechanism shaft 79. Due to this elasticity, the teeth of the toothed portion 74 (which may cause blocking if the relative positioning of the toothed portion 74 and the outer teeth 66 is not good) may recede to some extent and slide into the adjacent tooth spaces of the outer teeth 66. Thus, undesirable interference between the toothed portion 74 of the locking mechanism 72 and the outer teeth 66 of the toothed member 68 can be prevented. The interference between the toothed portion 74 of the locking mechanism 72 and the external teeth 66 may result in the locking mechanism 72 not being able to pivot from the initial position to the locked position.

The locking mechanism 72 and the outer teeth 66 of the toothed member 68 may be made of metal and/or plastic.

Fig. 7 and 8 show two different possible exemplary embodiments of the locking member 82, which locking member 82 is designed to move the locking mechanism 72 on/in the carrying handle 10 of the wheel adapter 2.

In the carrying handle 10 shown in fig. 8, a second spring element 86 is provided, which second spring element 86 is designed to push the locking member 82 into an initial position in which the locking mechanism 72 coupled to the locking member 82 by the cable 80 is in its initial position. When the locking mechanism 72 is disposed in its initial position, the toothed portion 74 of the locking mechanism 72 does not engage the outer teeth 66 of the toothed member 68.

By actuating (pulling) the locking member 82, the locking mechanism 72 is moved from the initial position to the engaged position via the cable 80. In this way, its toothed portion 74 meshes with the external toothing 66 of the toothed element 68, applying an additional mechanical tension to the movable outer element 32a, 33a, 34a and preventing further rotation of the rotating element 40, so as to firmly fasten the wheel holder 2 to the wheel 1.

By means of a locking member securing mechanism 88 formed in the carrying handle 10, the locking member 82 can be secured in an actuated position in which the locking mechanism 72 is in its engaged position. When the locking member 82 is secured in the actuated position, rotation of the rotary element 40 is prevented by engagement of the toothed portion 74 of the locking mechanism 72 with the external teeth 66 of the toothed element 68, i.e., the rotary element 40 remains blocked even when the operator's hand is removed from the locking member 82.

By operating the unlocking member 84 formed in the carrying handle 10, the fixing of the locking member 82 can be released, to thereby release the movable outer elements 32a, 33a, 34a and loosen the arms 22, 23, 24, so that the wheel holder 2 can be easily removed from the wheel 1.