JP2003191705A - Wheel mounting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel mounting device which is excellent in silence, secures supporting strength and is realized in a simple constitution. <P>SOLUTION: In this wheel mounting device in which a bearing part 4 or a rotation axis 5 is provided at an upper part of a wheel mounting base 3 for rotatably supporting a wheel 2 on an axle 1 extended at a lower part, the rotation axis 5 or the bearing part 4 with the axial direction in the vertical direction is provided at a mounting part 7 to be a mounting point, and the rotation axis 5 is rotatably mounted at the bearing part 4 so that the wheel 2 is suspended at the predetermined mounting point by this rotation axis 5 in capable of horizontal rotation, at least one each at an upper and a lower, totalling two or more of bearings receiving bodies 6 to which an inner wheel part 6A to which the rotation axis 5 is mounted is rotatably connected to an outer wheel part 6B through a bearing 6C are arranged and fixed with a mounting plate part 3A of the wheel mounting base 3 or a mounting plate part 7A of the mounting part 7 to be the mounting point as a border with an axis mounting hole 6D by each of the inner wheel parts 6A communicating in the vertical direction and the bearing part 4 is provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel mounting device for horizontally rotatably mounting a moving wheel on a leg of a cargo bed.

[0002]

2. Description of the Related Art A horizontally rotatable wheel mounting device provided on a carriage or cart for carrying heavy loads, a movable bed or furniture, etc. ensures sufficient bearing strength. For this purpose, a ring-shaped groove is formed on the upper side of the bearing, which is the wheel side, in which a bearing is interposed, and a large number of ball bearings are housed in this groove, and a rotating plate is fixed to the mounting side so as to cover it. , The bearing is supported in the vertical direction so that it can be rotated horizontally. In this case, the bearing strength is large, but the friction noise and impact noise are large and the noise during movement is large.

Quietness is required in urban areas and houses, especially in hospitals, and improvements are required.

However, in order to improve noise reduction, for example, a bearing device having an up-down direction as an axial direction is used as a bearing portion. For example, this bearing portion is provided on a wheel mounting base, and a rotating shaft serving as a mounting shaft is attached to this bearing portion. If the rotation shaft is made rotatable by the bearings arranged on the outer periphery of the rotation shaft so that the wheel can be horizontally rotated, the wheel mounting device becomes considerably quieter than the above-mentioned structure, Since a load is received from the axial direction and this is supported by the bearing device on the outer periphery, the bearing strength is not sufficiently secured, the limit load becomes small, and the application is limited, for example, a quiet bed with wheels. It is difficult to achieve such things.

Although attempts have been made to develop some silent wheel mounting devices, in either case, sufficient bearing strength cannot be obtained or the cost must be increased considerably.

The present invention solves such problems, and is excellent in quietness, secures bearing strength, is strong in torsional force, is excellent in durability, and can be realized with a simple structure. It is intended to provide a timely wheel mounting device.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

[0008] A bearing portion 4 or a rotary shaft 5 whose axial direction is the vertical direction is provided on an upper portion of a wheel mounting base 3 which supports a wheel 2 on an axle 1 which is erected at a lower portion, and a mounting portion 7 which is a mounting location. Rotating shaft 5 or bearing portion 4 whose axial direction is the vertical direction
The wheel mounting device is configured so that the rotating shaft 5 is rotatably mounted on the bearing portion 4, and the wheel 2 can be vertically rotatably hung vertically at a predetermined mounting location by the rotating shaft 5. In addition, the bearing bearing body 6 in which the inner ring portion 6A to which the rotating shaft 5 is attached is rotatably connected to the outer ring portion 6B via the bearing 6C, is attached to the mounting plate portion 3A above the wheel mounting base 3 or A total of two or more bodies are integrated at least vertically with the mounting plate portion 7A of the mounting portion 7 serving as the mounting location as a boundary, and the shaft mounting holes 6D formed by the inner ring portions 6A are arranged and fixed so that they are vertically communicated with each other. The present invention relates to a wheel mounting device characterized in that the bearing portion 4 is provided.

Further, the bearing bearing body 6 is fixed to the upper and lower surfaces of the mounting plate portion 3A of the wheel mounting base 3 or the mounting plate portion 7A of the mounting portion 7 serving as the mounting location, respectively. The bearing portion 4 is provided such that a communication hole 9 provided in 3A and 7A and a shaft mounting hole 6D formed by each inner ring portion 6A of the bearing bearing body 6 are vertically communicated with each other. The present invention relates to a wheel mounting device.

Further, the bearing bearing body 6 is press-fitted into a bearing body engaging portion 8 which is fixed to the upper and lower surfaces of the mounting plate portions 3A and 7A and fixed to the mounting plate portions 3A and 7A. The present invention relates to the wheel mounting device according to any one of claims 1 and 2.

The bearing body engaging portion 8 is made of a material softer than the mounting plate portions 3A, 7A or the bearing bearing body 6, and the bearing bearing body 6 is attached to the deformable bearing body engaging portion 8. The wheel mounting device according to claim 3, wherein the bearing bearing body (6) is press-fitted to hold and fix the bearing bearing body (6) on the upper and lower surfaces of the mounting plate portions (3A, 7A).

The sleeve-shaped bearing body engaging portion 8 for press-fitting and fixing the bearing bearing body 6 is attached to the attaching plate portions 3A, 7A by an attaching rod 10 such as a fitting pin or a screw inserted from the up and down direction. The present invention relates to the wheel mounting device according to any one of claims 3 and 4, which is fixed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention (how to carry out the invention) will be briefly described with reference to the drawings and showing its function and effect.

For example, the bearing portion 4 is provided on the wheel side, and the rotating shaft 5 is provided.
In the case where the wheel is provided on the mounting portion side (vehicle body side), the wheel side that is rotatably mounted horizontally, that is, the upper portion (horizontally) of a wheel mounting base 3 (for example, a fork) that pivotally supports a wheel 2 on an axle 1 that is installed on the lower portion. The mounting plate portion 3A) is provided with a bearing portion 4 whose axial direction is the vertical direction (mounting direction), and the rotary shaft 5 vertically hung on the mounting portion 7 which is a mounting location on the vehicle body side is provided for this bearing. It is attached to the portion 4 and is mounted so that the wheel 2 can be horizontally rotated together with the wheel mounting base 3 about the rotation shaft 5.

On the contrary, when the bearing portion 4 is provided on the mounting portion side, which is the vehicle body side, and the rotating shaft 5 is provided on the wheel side, the vertical direction is the axial direction above the wheel mounting base 3 (mounting plate portion 3A). The rotary shaft 5 is arranged so that the bearing portion 4 is provided in the mounting portion 7 on the vehicle body side, and the bearing portion 4 and the rotary shaft 5 are connected to each other. The wheel mounting base 3 and the wheel 2 are mounted so as to be horizontally rotatable.

In this bearing portion 4, a bearing bearing body 6 in which an inner ring portion 6A to which a rotating shaft 5 is attached is rotatably connected to an outer ring portion 6B via a bearing 6C, a mounting plate portion 3A,
Since it is formed by being fixed to 7A, it can be rotated in the vertical direction as compared with the structure in which a bearing is interposed between a supporting plate and a rotating plate which are sandwiched from the vertical direction as described in the conventional example. Inner ring portion 6A for mounting the rotating shaft 5 with the axis as the axial direction
Since the bearing 5C is arranged on the outer circumference of the outer ring portion 5B and the outer ring portion 5B is horizontally rotatable with respect to the inner ring portion 6A via the bearing 5C, the wheel mounting device is extremely silent.

Moreover, according to the present invention, in this bearing portion 4, the bearing bearing body 6 is arranged in at least two upper and lower stages, and the rotating shaft 5 is provided.
And further, the two-stage bearing bearing body 6 is fixed to the upper and lower surfaces of the mounting plate portions 3A and 7A, and the shaft mounting holes 6D by the inner ring portions 6A of the upper and lower bearing bearing bodies 6 are in communication with each other. This mounting plate part 3
Since the rotating shaft 5 is supported by the upper and lower bearing bearing bodies 6 on the boundaries of A and 7A, the rotating shaft 5 is arranged in the vertical direction which is the load direction in order to improve the quietness. A bearing 6C which is provided to dispose the rotary shaft 5 on the outer periphery thereof.
Even if the bearing is configured to rotate freely, the bearing strength is improved and sufficient bearing strength (for example, in the delivery and transportation industry or department stores
A bearing strength that can withstand enough to be used as a trolley or cart used for transportation in supermarkets, company warehouses, etc., or a bed for sick person transportation), that is, a durable strength against torsional force is sufficiently secured. It will be possible to realize a quiet caster.

When each bearing bearing body 6 is fixed to the mounting plate portions 3A and 7A, for example, it is press-fitted into a sleeve-shaped bearing body engaging portion 8 and the bearing body engaging portion 8 is attached to the mounting plate portion. The bearing strength (durability) is further improved by fixing to 3A and 7A, and further, the material of the bearing body engaging portion 8 is iron and the material of the bearing bearing body 6 and the mounting plate portions 3A and 7A. On the other hand, the use of aluminum, which is softer than iron, facilitates press-fitting engagement, and there is no risk of damage to the bearing bearing body 6 during press-fitting. Further, the bearing body engaging portion 8 is deformed during press-fitting work, and the bearing bearing body is deformed. By holding 6, the bearing strength is improved, and by holding by this soft (deformable) bearing body engaging portion 8,
The twisting force can be absorbed, and the durability strength is further improved.

Accordingly, it is possible to realize a wheel mounting device having a mounting structure which is easy to assemble and is excellent in mass productivity, and which has a mounting structure which has been required so far and which is quiet and has high strength.

[0020]

Embodiments of the present invention will be described with reference to the drawings.

In this embodiment, the bearing portion 4 is provided on the wheel side, and the rotary shaft 5 is provided on the mounting portion side (vehicle body side). The bearing portion 4 is erected under the U-shaped plate with the erection plate side as the upper side. Axle 1 and wheels 2
A wheel mounting base 3 (for example, a fork) that rotatably supports a bearing plate 4 having a vertical direction as an axial direction (mounting direction) is provided on a horizontally mounted mounting plate part 3A (the installation plate). A rotary shaft 5 vertically installed on a mounting portion 7 serving as a mounting place is press-fitted into the bearing portion 4 and caulked at its lower end to be mounted. The wheel mounting base 3 and the wheel 2 are horizontally rotated around the rotary shaft 5 as an axis. It is configured so that it can be attached freely.

In the bearing portion 4 of this embodiment, a bearing bearing body 6 in which an inner ring portion 6A to which a rotary shaft 5 is attached is rotatably connected to an outer ring portion 6B via a bearing 6C, is attached and fixed to a mounting plate portion 3A. In addition, the bearing bearing body 6 is vertically integrated with the upper mounting plate portion 3A of the wheel mounting base 3 as a boundary, and a total of two shaft mounting holes 6D are formed by the inner ring portions 6A. It is arranged and fixed so that

Specifically, a through hole 9A is provided in the center of the mounting plate portion 3A of the wheel mounting base 3 and is communicated with a spacer 9B which is located between the upper and lower bearing bearing bodies 6 so as to match the through hole 9A. A hole 9 is provided, and the communication hole 9 provided in the mounting plate portion 3A and the shaft mounting hole 6D formed by each inner ring portion 6A of the bearing bearing body 6 are vertically communicated with each other, and the bearing portion 4 is provided. A rotary shaft 5 vertically extending from a mounting portion 7 on the main body side is press-fitted into a bearing portion 4 composed of the two-stage bearing bearing body 6 and the lower end is caulked and fixed.

Further, in this embodiment, the upper and lower bearing bearing bodies 6 are press-fitted into the sleeve-shaped bearing body engaging portions 8 which are fixed to the upper surface and the lower surface of the mounting plate portion 3A, and the press-fitting is fixed. The sleeve-shaped bearing body engaging portion 8 is attached and fixed to the mounting plate portion 3A by a fitting pin 10 (mounting rod 10) inserted from the up and down direction.

Moreover, the bearing engaging portion 8 is made of aluminum, which is softer than the mounting plate portion 3A and the bearing bearing body 6 which are made of iron. The bearing bearing body 6 is press-fitted and engaged so that the bearing bearing body 6 is held and fixed on the upper surface and the lower surface of the mounting plate portion 3A.

Therefore, since the rotating shaft 5 is supported by the bearing bearings 6 in the upper and lower two stages with the mounting plate portion 3A as the boundary, in order to improve the noise reduction, the vertical direction as the load direction is as described above. Even if the rotary shaft 5 is provided and the rotary shaft 5 is rotatably supported by the bearing 6C arranged on the outer periphery of the rotary shaft 5, the bearing strength is improved and the bearing strength is sufficient (for example, in the delivery and transportation industry or department stores).・ Supporting strength that can withstand trolleys and carts used for transportation in supermarket stores, company warehouses, etc., or beds for sick persons), that is, sufficient durability against torsional force is secured. It will be possible to realize a typical silent caster.

Further, in the present embodiment, when fixing each bearing bearing body 6 to the upper and lower sides of the mounting plate portion 3A, the bearing bearing bodies 6 are press-fitted into the sleeve-shaped bearing body engaging portions 8, respectively. By fixing 8 to the mounting plate portion 3A by the mounting rod 10, the bearing strength (durability) is further improved. Further, the material of the bearing body engaging portion 8 is the material of the bearing bearing body 6 and the mounting plate portion 3A. In contrast to iron, which is softer than iron, press-fit engagement is facilitated, and the bearing bearing body 6 is not likely to be damaged during press-fitting, and the bearing body engaging portion 8 is deformed during press-fitting work. Bearing bearing body 6
By holding the bearing bearing strength, the bearing strength is increased, and by holding the soft (deformable) bearing body engaging portion 8, the twisting force can be absorbed, and the durability strength is further improved.

The present invention is not limited to this embodiment. For example, the bearing portion 4 may be provided on the mounting portion 7 on the vehicle body side, in which case the plate-shaped portion of this mounting portion 7 is mounted on the mounting plate. This may be provided as the portion 7A, or the bearing portion 4 may be provided on the plate-shaped portion and attached to the attachment location to be provided on the attachment plate portion 7A of the attachment portion 7. The physical structure can be designed appropriately.

[0029]

Since the present invention is constructed as described above, it is an epoch-making wheel mounting device which is excellent in quietness, secures the bearing strength, and can be realized with a simple structure.

That is, since the rotary shaft is supported by the upper and lower two-stage bearing bearings with the upper part of the wheel mounting base or the mounting plate part of the mounting part as a boundary, the load is thus reduced in order to improve the quietness. Even if the rotary shaft is arranged in the vertical direction, which is the vertical direction, and the rotary shaft is rotatably supported by the bearing disposed on the outer periphery of the rotary shaft, the bearing strength is improved and the bearing strength is sufficient (for example, delivery transportation). (Bearing strength sufficient to be used for trolleys and carts used for transportation in business, department store / supermarket stores, company warehouses, etc.), that is, sufficient durability against torsional force is secured. , It will be possible to realize a revolutionary silent caster.

Further, according to the present invention as set forth in claims 2, 3 and 5, the wheel mounting device can be constructed more simply and is extremely practical.

In particular, according to the third aspect of the invention, since the upper and lower bearing bearing bodies are attached via the bearing body engaging portions, the structure can be further simplified, and the bearing strength and the durability strength are further improved. It becomes a typical wheel mounting device.

Further, in the invention according to the fourth aspect, the press-fitting engagement becomes easy, there is no possibility of damaging the bearing bearing body at the time of press-fitting, and the bearing body engaging portion is deformed at the time of press-fitting work, and the bearing bearing body is deformed. By holding the bearing, the bearing strength is improved, and by holding the soft (deformable) bearing body engaging portion, the torsional force can be absorbed and the durability strength is further improved. It will be a temporary wheel mounting device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a usage state of this embodiment.

FIG. 2 is an explanatory exploded perspective view of a main part of this embodiment.

FIG. 3 is an explanatory enlarged cross-sectional view of a main part of this embodiment.

FIG. 4 is an explanatory plan view in which a part of the present embodiment is cut away.

[Explanation of symbols]

1 axle Two wheels 3 wheel mounting base 3A mounting plate 4 bearing 5 rotation axis 6 Bearing bearing body 6A inner ring 6B outer ring part 6C bearing 6D shaft mounting hole 7 Mounting part 7A mounting plate 8 Bearing body engaging part 9 communication holes 10 Mounting rod

Claims (5)

[Claims] 1. A bearing portion or a rotating shaft having a vertical direction as an axial direction is provided on an upper portion of a wheel mounting base that supports a wheel on an axle laid at a lower portion, and the vertical direction is provided at a mounting portion that is a mounting location. Is provided with a rotating shaft or a bearing portion that is oriented in the direction, and the rotating shaft is rotatably attached to the bearing portion, and the rotating shaft allows the wheel to vertically hang vertically at a predetermined mounting location. In the wheel mounting device described above, a bearing bearing body in which an inner ring portion to which the rotating shaft is attached is rotatably connected to an outer ring portion via a bearing is provided in the mounting plate portion or the mounting location on the wheel mounting base. The bearing portion is provided by fixing and disposing so that the shaft mounting holes of the inner ring portions are in communication with each other in the vertical direction, at least one body in total at least in the upper and lower sides with the mounting plate portion of the mounting portion as a boundary. Wheel mounting equipment characterized by Place 2. A communication hole formed in the mounting plate portion by fixing the bearing bearing body to the upper and lower surfaces of the mounting plate portion of the wheel mounting base or the mounting plate portion of the mounting portion serving as the mounting location, respectively. 2. The wheel mounting device according to claim 1, wherein the bearing portion is provided so as to vertically communicate the shaft mounting hole formed by each inner ring portion of the bearing bearing body. 3. The bearing bearing body is fixed to the mounting plate portion by press-fitting engagement with a bearing body engaging portion fixed to the upper surface and the lower surface of the mounting plate portion.
The wheel mounting device according to any one of 1. 4. The bearing body engaging portion is formed of a material softer than the mounting plate portion or the bearing bearing body, and the bearing bearing body is press-fitted into the deformable bearing body engaging portion to form a bearing bearing. The wheel mounting device according to claim 3, wherein the body is configured to be hold-fixed to the upper surface and the lower surface of the mounting plate portion. 5. The sleeve-shaped bearing body engaging portion for press-fitting and fixing the bearing bearing body is attached and fixed to the mounting plate portion by a mounting rod such as a fitting pin or a screw inserted from the up and down direction. The wheel mounting device according to any one of claims 3 and 4.