JPS63219943A - Rotary power transmission device - Google Patents

Abstract

PURPOSE:To enable power transmission in any direction by providing an intermediate shaft which intersects at right angles to an input shaft and an output shaft in between the bevel gear of said input shaft and the bevel gear of said output shaft and providing idler bevel gears which are integrally formed in a back condition on said intermediate shaft. CONSTITUTION:A bevel gear 7a and a bevel gear 7b which is coaxial with the bevel gear 7a are integrally formed in a back to back condition forming an idler bevel gear 7, which is relatively rotatable with respect to an intermediate shaft 8. And, the idler bevel gear 7 is interposed in between the bevel gears 4, 10 on each end of an input shaft 1 having the bevel gear 4 on one end and an output shaft 10 having the bevel gear 10 on one end. And, at the defined angle positions of the input shaft 1 and the output shaft 15, the intermediate shaft 8 is clamped between an input shaft side casing 3 and an output shaft side casing 17, to fix the relative angle positions of the shaft 1 and the output shaft 15. Hence, the input shaft 1 and the output shaft 15 can be rotated 360 deg. in any direction via the intermediate shaft 8. And, the intermediate shaft 8 is clamped and fixed at a desired angle position for use.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotary power transmission device. More specifically, it relates to a device capable of transmitting power to angular positions from 0 to 360''.

(Prior Art) Conventionally, so-called universal joint type and flexible shaft type are known as non-linear power transmission devices.

Figures 5 and 6 are diagrams of the universal joint system. In the case of FIG. 5, there is one joint, and in the case of FIG. 6, there are two joints. With this method, it is possible to transmit power up to an angle of 101 to 30 inches, but it is considered impossible to use it at angles greater than that.

Further, in Fig. 5, only one bearing is required, but in Fig. 6, two bearings are required.

Furthermore, as the angle becomes tighter, the joint becomes more strained, making it impossible to transmit large torque.

In the flexible shaft system shown in Fig. 7, power is transmitted using a flexible material such as wire, so the angle can be changed freely, but the maximum angle at which power can be transmitted is 90° and the minimum radius of curvature R = about 200. Limited. Therefore, large torque cannot be transmitted.

(Problems to be Solved by the Invention) The present invention aims to solve the problems of the universal joint type and flexible shaft type, and to provide a transmission device that can transmit power at any angle of 360''.

(Means for solving problems according to the invention) An input shaft having a bevel gear at one end, an output shaft having a bevel gear at one end, a bevel gear meshing with the bevel gear on the input shaft side, and a bevel gear on the output shaft side. The meshing bevel gears are assembled integrally with their backs to each other and are rotatable relative to an intermediate shaft, and the intermediate shaft is tightened at a predetermined angular position so that the bevel gears in the back-to-back state can be fixed in position. The side, output side, and intermediate shaft are covered with a casing, making it possible to use it underwater.

(Example) An explanation will be given with reference to FIGS. 1 and 2. FIG. 1A shows a power transmission device according to the present invention. Reference numeral 1 denotes an input shaft, which is incorporated into the input side casing 3 via a bearing 2. 4 is a bevel gear secured to the end of the input shaft 1 with a key 5. A connecting shaft (FIG. 3) is connected to the input shaft 1 by a spring pin, key, or square shaft connection. Reference numeral 6 designates a female thread that connects the connecting shaft pipe cover (FIG. 3) to the input side casing 3.

7a and 7b are bevel gears, which are placed back to back and are integrally assembled. It is rotatable relative to the intermediate shaft 8 via a bearing 9. The bevel gear 4 on the input side meshes with the bevel gear 7a, and the bevel gear 7b, which rotates integrally with the bevel gear 7a, meshes with the bevel gear 10 on the output side.

The intermediate shaft 8 is perpendicular to the input shaft 1, is inserted between the input side casing 3 and the output side casing 17, is tightened with a grooved nut 13 via a collar 12, and is prevented from rotating with a 10% pin 14 or the like.

The output bevel gear 10 is attached to the output shaft 15 with a key 11 and is incorporated into the output casing 17 via a bearing 16. In order to attach a pipe cover to the output side casing 17 to protect the connecting shaft, for example, a ball key 18 is attached.
and a set screw female screw 19 are provided.

20 is an intermediate shaft cover on the input side, the upper part of which is fixed to the input side casing 3, and the lower part of which a thrust ring 21 is attached by welding or the like. Similarly, 22 is an intermediate shaft cover on the output side, which is fixed to the output side casing at the lower part, and the thrust ring 23 is attached to the upper part by welding or the like.The thrust rings 21 and 23 are in close contact with each other through the O ring 24. Provides a receiving surface for thrust loads.

FIG. 3 shows a transmission mechanism using two transmission devices A of the present invention. The two transmission devices A are connected by a connecting shaft 25a, and the outside of this is protected by a cover pipe 26a. Both ends of the cover pipe 26a are screwed and connected to the female thread 6 provided in the input side casing 3.

Connecting shafts 25b and 25c covered by cover pipes 26b and 26c are also connected to the drive side and the transmission side.

Now, as shown in FIG. 4, in the transmission device A, the input shaft 1 and the output shaft 15 are connected via the idler bevel gears 7a and 7b attached to the intermediate shaft 8 perpendicular to these, so that the input shaft 1 and the output shaft The shaft 15 can rotate in any direction by 3600 degrees via this intermediate shaft 8. Then, the intermediate shaft 8 is tightened and fixed at a desired angular position.

The material of the bevel gears 4, 7, 10, etc. is selected from iron, stainless steel, plastic, synthetic resin, etc. depending on the conditions such as the power to be transmitted. Also, the tooth profile is miter gear,
Spiral miter gears, miter gears, and other special gears are used.

(Effect) An intermediate shaft is provided between the bevel gear on the input shaft side and the bevel gear on the output shaft side, which is orthogonal to these axes, and idler bevel gears are provided back to back to this.

360” power can be transmitted in any direction.

In particular, back-to-back idler bevel gears allow the input and output sides to rotate in the same direction.

The transmission device is housed inside the casing, and the connecting shaft is also built into the pipe cover, so it has excellent safety.The six-pronged case and joints are all watertight, so it can be used underwater.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the transmission device of the present invention. Figure 2 is a right side view of Figure 1. Figure 3 shows a transmission mechanism using two transmission devices. FIG. 4 is a side view of FIG. 3 in the direction of the ■ arrow. Figure 5 shows a conventional universal joint type transmission device. Figure 6 shows a conduction device using two of the same devices. Figure 7 shows a flexible shaft type transmission device. In the figure: 1 Human power shaft 2 Bearing 3 Input end casing 4 Bevel gear 5 Key 6 Female screws 7a, 7b Bevel gear 8 Intermediate shaft 9 Bearing 10 Output side bevel gear 11 Key
12 Collar 13 Grooved nut 14
Cotter pin 15 Output shaft 16 Bearing 17
Output side casing 18 Ball key 19 Female thread 20 Intermediate shaft cover 21 Thrust ring 22 Intermediate shaft cover 23 Thrust ring 2
40 rings 25a, 25b, 25c connecting shafts 26a, 26b, 26c cover pipe or more

Claims (1)

[Scope of Claims] [I] An input shaft equipped with a bevel gear at one end, an output shaft equipped with a bevel gear at one end, a bevel gear meshing with the bevel gear on the input shaft side, and a bevel gear on the output shaft side. The meshing bevel gears are assembled integrally with their backs to each other and are rotatable relative to the intermediate shaft, and the intermediate shaft is tightened at a predetermined angular position so that the bevel gears in the back-to-back state can be fixed in position. Features a rotary power transmission device. [II] The rotary power transmission device according to claim I, characterized in that the input side, the output side, and the intermediate shaft are covered with a casing.