JP3176447B2 - Solid tire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid tire having an elastic body such as rubber integrally fixed to an outer peripheral surface of a hub.

[0002]

2. Description of the Related Art Among conventional solid tires, as shown in FIG. 3, a hub 11, a disk 12, a rim, and a rim are used when the outer diameter of an elastic body such as rubber is relatively larger than the inner diameter of the hub. Said rim 13 of a metal wheel body 14 comprising 13
It is known that an elastic body 15 such as rubber is directly vulcanized and pressure-bonded to the outer peripheral surface, or an elastic body 15 is subjected to bonding.

As shown in FIG. 4, a metal wheel body 14 having a disk 12 provided at the axial center of the outer peripheral surface of a hub 11 is provided.
A vulcanization and compression processing of an elastic body 15 is known. These are used as tires for industrial vehicles such as forklifts and are often used under relatively low speed and high load conditions, and are required to have not only economy but also durability and ride comfort.

[0004]

However, in the conventional solid tire shown in FIG. 3, there is a problem that the volume of the wheel body 14 is large and heavy, and the cost is high. 15 The distance from the outer peripheral surface is short, that is, the thickness of the elastic body 15 is small, and
Since the fixing portion 16 of the wheel body 14 and the wheel body 14 are flat, when receiving an external force such as an impact force, a centrifugal force, a driving force, and a braking force, the fixing portion 16
However, there is a problem that it is easily broken. On the other hand, in the solid tire shown in FIG. 4, there is a problem that the pressure of the tire portion S on the outer side in the radial direction of the disk 12 becomes particularly high, and the tire portion S is easily broken.

Further, both solid tires are formed by directly vulcanizing and bonding an elastic body 15 made of a rubber material having high wear and cut resistance and high hardness to a metal wheel body 14. Since the thickness of the elastic body 15 was small, ride comfort could not be required. In view of the above problems, the present invention provides a solid tire capable of improving economy, durability, and riding comfort and reducing weight when the height (thickness) of the elastic body is relatively large. The purpose is to:

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the present invention is characterized in that in a solid tire in which an elastic body such as rubber is fixed to an outer peripheral surface of a cylindrical hub, the elastic body
A cylindrical reinforcing member with higher rigidity is
Concentrically embedded inside the elastic body and outside the reinforcing member
The peripheral side is composed of a cut-resistant tread rubber layer,
The inner peripheral side of the strong member is a base rubber layer with cushioning properties
(7) .

[0007]

According to the present invention, the elastic member is concentric with the hub axis.
Each of the reinforcing members embedded in the body has a simple cylindrical shape, so that weight reduction and cost reduction can be easily achieved. Also, the outer peripheral side of the reinforcing member is
It is composed of a tread rubber layer with
Since it is configured in the base rubber layer having a Deployment property even when an external force in the radial direction is applied to the solid tire, motor
Since the occurrence of scratches on the ear contact surface (outer peripheral surface) is small , the impact of the external force is reduced , and the propagation of the external force to the fixed portion between the hub and the elastic body is suppressed, so that the durability and the load resistance can be improved.
Further, since the reinforcing member is buried inside the elastic body, the rigidity of the elastic body is increased, so that the height of the elastic body can be increased, so that the riding comfort can be improved.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a solid tire according to the present invention. FIG. 1 shows a longitudinal sectional view, and FIG. 2 shows a side view thereof. In FIG. 1, reference numeral 1 denotes a metallic hub having a cylindrical shape, and bearings 3 for inserting a bearing or the like are provided inside the hub. An elastic body 2 made of rubber or the like is fixedly integrated with the outer peripheral surface of the hub 1 by vulcanization bonding means or the like.

Inside the elastic body 2, a cylindrical material having a larger inner diameter than the outer diameter of the hub 1, a metal having higher rigidity than the elastic body 2, and a thinner thickness. Reinforcing member 4 is hub 1
And is buried concentrically with the axis of the elastic member 2, thereby increasing the rigidity of the elastic body 2. Furthermore, the outer peripheral side wear resistance of the reinforcing member 4, and a tread rubber layer 6 having excellent cut resistance, the inner circumference side is the base rubber layer 7 with improved cushioning to lower the rubber hardness And solid tires roll
The contact surface at the time is abrasion resistance due to the tread rubber layer 6 and resistance to dust.
While reducing scratches, etc. due to the cut properties, while improving durability
Shock mitigation due to cushioning by base rubber layer 7
You do it.

On both sides of the elastic member 2 and inside the reinforcing member 4, recesses 5 for stabilizing the position of the reinforcing member 4 during vulcanization of the elastic member 2 are provided at appropriate intervals along the circumferential direction. Are provided in large numbers. When the reinforcing member 4 is embedded in the elastic body 2, it is preferable that the position of the reinforcing member 4 be embedded in a range of 30% to 70% of the height of the elastic body 2.

According to the solid tire having the above structure, the hub 1
Since the reinforcing member 4 has a simple cylindrical shape, the weight and cost can be easily reduced. Even when an external force such as a radial impact force, a centrifugal force, a driving force, and a braking force acts on the solid tire, the reinforcing member 4 is buried inside the elastic body 2. The reinforcing member 4 reduces the impact of the external force and suppresses the propagation of the hub 1 and the elastic body 2 to the fixing portion 8, thereby improving durability and load resistance. Also, unlike the conventional case, the height of the elastic body 2 fixed to the hub 1 can be increased, so it is easy to mitigate the shock due to external force, preventing the destruction of the fixed part more effectively and suppressing vibration. The ride comfort is also good. Further, the reinforcing member 4 is an elastic body 2
Since it is buried inside, that is, it is protected by a rubber layer, it has good durability and load resistance.

The present invention is not limited to the above embodiment, and the hub 1 or the reinforcing member 4 may be formed of a synthetic resin such as engineering plastic.
The means for fixing the elastic body 1 to the elastic body 2 may be either vulcanization bonding or bonding using an adhesive. Further, the concave portions 5 on both side surfaces of the elastic body 2 may have a groove shape continuous in the circumferential direction, or may be omitted.

[0013]

According to the present invention, the hub and the elastic member
Since the reinforcing member embedded in the part has a simple cylindrical shape, it is easy to reduce weight and cost, and the outer peripheral side of the reinforcing member has cut resistance.
Tread rubber layer with inner cushioning
Even when external forces such as radial impact force, centrifugal force, driving force, braking force, etc. are applied to the solid tire, scratches on the tire contact surface are small because the base rubber layer
In addition , the propagation of the hub and the elastic body to the fixed portion can be suppressed, and the durability and the load resistance can be improved. Furthermore, since the height of the elastic body fixed to the hub could be increased,
The shock due to external force can be reduced to more effectively prevent the destruction of the fixed portion, and vibration can be suppressed to improve ride comfort.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a longitudinal sectional view showing a conventional example.

FIG. 4 is a longitudinal sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub 2 Elastic body 4 Reinforcement member

Claims (1)

(57) [Claims] 1. A solid tire in which an elastic body (2) such as rubber is fixed to an outer peripheral surface of a cylindrical hub (1).
A tubular reinforcing member having higher rigidity than the elastic body (2)
(4) The elastic body is made concentric with the axis of the hub (1).
Embedded in (2), and the outer peripheral side of the reinforcing member (4) is
Comprising a tread rubber layer (6) having cut resistance,
The inner peripheral side of the strong member (4) has a base
A solid tire comprising a rubber layer (7) .