JPS5852894Y2 - Transmission wheels of forming machines for concrete piles, etc. - Google Patents

Description

[Detailed explanation of the invention] This invention is based on concrete piles, concrete poles,
Or the driving shaft that supports and drives the formwork casing in a formwork rotary forming machine used to manufacture long, slender and heavy concrete pipes such as fuse pipes, or the drive shaft that drives and rotates the formwork casing. This invention relates to an improvement of a transmission wheel that supports a frame casing but is a support ring that rotates following the form casing.

Regarding this type of transmission wheel, the applicant had previously
No. 0752 and Utility Model Publication No. 53-13814, etc., the circumferential portion of the form casing that is in contact with the tire circumferential surface is made of a wear-resistant hard resin such as polyamide or urethane, and the contact surface between the circumferential portion and the tire is Although it is proposed to suppress the generated noise to a minimum, the present invention is a further improvement of the transmission wheel according to this proposal.

That is, the transmission wheel supports the formwork casing weighing 1:5 to 2 tons, and rotates at a high speed of about 500 rpm while bouncing up and bouncing.
The wear-resistant hard resin that forms the circumferential part becomes fatigued by high-speed rotation and vibration and easily generates heat. Since the structure is such that heat generated inside the circumferential portion tends to accumulate, there is a drawback that the circumferential portion softens due to the heat and is subject to severe wear or melting and damage.

In view of the above-mentioned drawbacks, the present invention aims to provide a transmission wheel with a long life by providing a structure in which the heat generated inside the circumferential portion is easily dissipated to the outside.

That is, the present invention provides a metal annular body that straddles between a bub fixed to a rotating shaft and a circumferential portion of a molding frame that supports the tire, and connects the bub and the circumferential portion with bolts. In a transmission wheel that is connected to an annular body and has a sound-absorbing material inside or filled between the outer peripheral surface of the bub and the inner peripheral surface of the ring part, the ring part is made of a wear-resistant hard resin. The gist of this invention is a transmission wheel for a machine for forming concrete piles, etc., which is formed by polymerizing donut-shaped rings and interposing a metal ceramic body between the overlapping parts of the rings. be.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

1 is a rotating shaft, 2 is a bub fixed on the rotating shaft 1 with a key, and 3 is a ring part whose outer circumferential surface 4 contacts the tire circumferential surface of the form casing to transmit rotation to the tire, and is made of polyamide or polyacetal. A metal annular ceramic body 6 is interposed between two donut-shaped annular bodies 5a and 5b made of a wear-resistant hard resin such as polyurethane and polymerized.

7 and 7' are metal annular bodies that are installed between the bub 2 and the circumferential part 3 on both sides of the ring body, and 8 is a metal annular body that extends between the circumferential annular bodies 7 and 7' and the circumferential part 3.
9 is a bolt for fixing the circumferential annular bodies 7, 7' to the bubble 2, and 10 is a ring-shaped filler having sound absorbing properties made of urethane resin or the like.

Since this transmission wheel has the above-described structure, even if the annular bodies 5a and 5b made of wear-resistant hard resin generate internal heat during use, the heat will not accumulate in the annular bodies and the annular bodies 5
The plate-shaped metal partition 6 interposed between a and 5b has good thermal conductivity, so that the heat can be quickly dissipated to the outside through this.

Further, the metal annular bodies 7, 7' that are in contact with the outer surfaces of the annular bodies 5a, 5b have good thermal conductivity as well, and the generated heat can be dissipated to the outside through these annular bodies 7, 7'. This makes it possible to prevent the annular body 5 from melting, severe wear and destruction as much as possible, and to obtain a transmission wheel with a long life.

In addition, in the above-mentioned embodiment, the circumferential portion 3 is composed of two ring-shaped bodies 5a, 5.
Although the case of forming by polymerizing b is shown, three or more ring-shaped bodies may be polymerized and a metal image body may be appropriately interposed between the polymerized parts.

Furthermore, the metal picture bodies may be interposed all around the ring, or may be interposed partially in the circumferential direction.

FIG. 3 shows another embodiment of the invention, in which ring-shaped bodies 5a, 5b
The metal picture body 6' interposed between the overlapping parts of the ceramic body 6' has an inverted cross-sectional shape, and the ceramic body 6' and the circumferential annular bodies 7, 7 in contact therewith can be seen from the inner peripheral surfaces of the annular bodies 5a and 5b. This allows heat to escape through the

As described above, according to the present invention, it is possible to obtain a durable power transmission wheel that can sufficiently withstand high-speed rotation and severe vibration by quickly discharging heat generated in the hard resin ring circumferential portion to the outside.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a cross-sectional front view showing the main parts of a transmission wheel, FIG. 2 is a side view, and FIG. 3 is a cross-sectional front view showing the main parts of another embodiment. It is. 3... Circumferential part, 5... Annular body, 6...
...Porcelain body, 7.7'...Annular body.

Claims (1)

[Scope of utility model registration request] A metal annular body is provided astride between the bub fixed to the rotating shaft and the circumferential part of the molding frame that supports the tire, and the bub and the circumferential part are respectively connected to this annular body by bolts, In a transmission wheel in which a sound-absorbing material is lined or filled between the outer circumferential surface of the bubble and the inner circumferential surface of the ring circumference, the circumferential portion is made of a plurality of donut-shaped rings made of abrasion-resistant hard resin. A power transmission wheel for a machine for forming concrete piles, etc., characterized in that it is formed by polymerizing a ring-shaped body and interposing a metal ceramic body between the polymerized parts of the ring-shaped body.