JPH0650349A - Universal joint - Google Patents

Abstract

PURPOSE:To obtain a small-sized and compact universal joint which permits the transmission of the revolution torque between two shafts which are not parallel and do not cross and is hardly restrained in installation. CONSTITUTION:A pair of shaft cases 1a and 1b are connected in free revolution by a connecting shaft 2 extending in the crossing direction for the length directions of the cases. Bevel gears 4a and 4b are formed at both the edge parts in the axial direction of a torque transmission member 3 which is supported in turnable manner around the connecting shaft 2. Bevel gears 7a and 7b are installed at the edge parts of a pair of shafts 5a and 5b assembled in the shaft cases 1a and 1b, and the bevel gears 7a and 7b are meshed with the bevel gears 4a and 4b of the torque transmission member 3, and a torque is transmitted between a pair of shafts 5a and 5b through the torque transmission member 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a universal joint for transmitting rotational torque between two shafts.

[0002]

2. Description of the Related Art Generally, a universal joint is used to transmit a rotational torque between two shafts.

By the way, the conventionally known universal joint can be used only when the axes of the two shafts intersect with each other, and therefore, when connecting the two shafts which are neither parallel nor intersect with each other. Requires the provision of an intermediate shaft between the end portions of the two shafts, and the intermediate shaft and each of the two shafts need to be connected by two universal joints, resulting in a disadvantage that the length of the joint portion becomes long. .

If a screw gear is used instead of the universal joint as described above, the above inconvenience can be solved. In this case, however, the relative angles of the two shafts can be freely set. Since it cannot be changed, there is an inconvenience that the installation is restricted.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to transmit a rotational torque between two shafts which are neither parallel nor intersect with each other, and the relative angle between the two shafts can be freely changed. The purpose of the present invention is to provide a small-sized and compact universal joint that is not restricted by the mounting that can be performed.

[0006]

In order to solve the above-mentioned problems, in the present invention, a pair of shaft cases are
A torque transmitting member, which is rotatably connected by a connecting shaft extending in a direction intersecting the length direction of the case, is rotatably supported around the connecting shaft, and a pair of beveled teeth are provided at both axial ends of the torque transmitting member. A bevel gear that meshes with the beveled teeth of the torque transmission member is attached to each of a pair of shafts that are provided and rotatably supported by being incorporated in each shaft case.

[0007]

With the above construction, when one of the pair of shafts rotates, the rotation is transmitted to the other shaft via the torque transmission member, and the rotational torque is transmitted between the pair of shafts. be able to.

Further, by rotating the pair of shaft cases relative to each other about the connecting shaft, the shaft rotates together with the case about the connecting shaft, and the relative angle of the pair of shafts can be adjusted arbitrarily. it can.

[0009]

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

As shown in FIG. 1 and FIG. 2, the pair of shaft cases 1a and 1b are the same as the shaft cases 1a and 1b.
The ends are rotatably connected by a connecting shaft 2 extending in a direction intersecting the length direction of b.

A torque transmitting member 3 is rotatably attached to the connecting shaft 2, and a pair of beveled teeth 4a and 4b are provided at both axial ends of the torque transmitting member 3.

Shafts 5a and 5b assembled inside the pair of shaft cases 1a and 1b are rotatably supported by bearings 6, and bevel gears 7a and 7b attached to the ends of the shafts 5a and 5b transmit torque. It meshes with the beveled teeth 4a and 4b of the member 3.

The universal joint constructed as described above adjusts the relative angles of the pair of shafts 5a and 5b, and in the angle adjustment state, each shaft case 1a,
1b is fixed and rotational torque is transmitted between the pair of shafts 5a and 5b.

Now, by relatively rotating the pair of shaft cases 1a and 1b about the connecting shaft 2,
Shafts 5a, 5 together with the shaft cases 1a, 1b
Since b rotates about the connecting shaft 2, the relative angle between the pair of shafts 5a and 5b can be arbitrarily adjusted.

After adjusting the angles of the pair of shafts 5a and 5b,
When one of the shafts 5a is rotated, the rotation is caused by the bevel gear 7
It is transmitted from a to the bevel gear 7b via the torque transmission member 3, and the shaft 5b rotates in the same direction.

Here, by setting the number of teeth of the bevel gears 7a and 7b to be the same, the pair of shafts 5a and 5b can be rotated at the same number of revolutions.

FIG. 3 shows another embodiment of the universal joint according to the present invention. In this embodiment, two shafts 5b and 5c are coaxially provided inside the shaft case 1b to rotatably support the shafts 5b and 5c.
The bevel gears 7b and 7c attached to the end of c are meshed with the bevel teeth 4b of the torque transmission member 3. The other structure is the same as that of the embodiment shown in FIG.

With the above construction, the rotation of the shaft 5a can be transmitted to the shafts 5b and 5c at the same time, and the shafts 5b and 5c can be rotated in opposite directions.

FIG. 4 shows still another example of the universal joint according to the present invention. In this example,
Both ends of the shaft 5b assembled inside the shaft case 1b are projected outward from both ends of the shaft case 1b,
A bevel gear 7b attached to the shaft 5b is meshed with a bevel tooth 4b of the torque transmission member 3.

In this embodiment, the shaft 5a can be rotated in the opposite direction by rotating the shaft 5a.

[0021]

As described above, in the universal joint according to the present invention, the shafts are respectively rotatably supported by incorporating the shafts inside the pair of shaft cases rotatably connected by the connecting shafts. Since the bevel gears attached to the ends are meshed with the bevel teeth of the torque transmission member provided rotatably around the connecting shaft, the rotational torque between the two shafts that are not parallel and do not intersect. Can be transmitted. In addition, since the relative angle between the pair of shafts can be arbitrarily adjusted by relatively rotating the pair of shaft cases about the connecting shaft, there is no limitation on the angle or direction of the shaft, and the size is small. Since it has a compact structure, it is possible to obtain effects such as not being restricted by attachment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a universal joint according to the present invention.

FIG. 2 is a vertical sectional front view of the same.

FIG. 3 is a vertical sectional front view showing another embodiment of the universal joint.

FIG. 4 is a vertical sectional front view showing still another embodiment of the universal joint.

[Explanation of symbols]

 1a, 1b Shaft case 2 Connection shaft 3 Torque transmission member 4a, 4b Bevel teeth 5a, 5b Shaft 7a, 7b Bevel gear

Claims (1)

[Claims] 1. A pair of shaft cases are rotatably connected by a connecting shaft extending in a direction intersecting the longitudinal direction of the case, and a torque transmission member rotatably supported about the connecting shaft. A universal type in which a pair of beveled teeth are provided at both ends in the axial direction, and a bevel gear that meshes with the beveled teeth of the torque transmitting member is attached to each of a pair of shafts that are incorporated in each shaft case and rotatably supported. Joint.