JPH0361723A - Rotating force transmitting means - Google Patents

Abstract

PURPOSE:To obtain sufficient strength and necessary flexibility and easily miniaturize a device by allowing individual divided portions of a cylindrical body or a plate-shaped body to function as meandering elastic bodies. CONSTITUTION:Notches 22 are formed in turn from both sides in the peripheral direction of a divided portion 20a. Notches 22 are formed along the plane perpendicular to the center axis 2a. The divided portion 20a is connected by a member meandering from the end section of the driving shaft side to the end section of the driven shaft side. Other divided portions 20b-20h are in the same mode as the divided portion 20a. When a driving shaft end section 8 is rotated, its rotating force is transmitted to a driven shaft end section 10 via a driving shaft end section fitting member 4, driving shaft side flange section 14, divided portions 20a-20h of a cylinder section 12, a driven shaft side flange section 16, and a driven shaft end section fitting member 6.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a means for transmitting rotational force from a driving shaft side to a driven shaft side, and particularly to a means for flexibly coupling the driving shaft side and the driven shaft side. This invention relates to rotational force transmission means.

[Prior Art and Problems to be Solved by the Invention] In various rotational force transmission mechanisms, a driving shaft side and a driven shaft side are connected by a rotational force transmission means such as a joint. In this connection, even if both shafts have the same center of rotation, various causes may cause deviations between the driving and driven shafts, such as the shaft deviation, that is, the angle between the rotation centers, or the shaft eccentricity, that is, the angle between the rotation centers. Parallel misalignment may occur, and a joint or the like that can effectively deal with this may be required. Furthermore, relative movement (thrust movement) in the axial direction may occur between the driving shaft and the driven shaft, and it is desirable to be able to deal with this effectively.

Therefore, a flexible shaft joint using a flexible member such as a spring or rubber is sometimes used as a rotational force transmitting means that can effectively deal with both declination and eccentricity and can perform thrust movement.

The present invention provides an improved structure that can effectively deal with both axial deviation and axial eccentricity, is capable of thrust movement, is compact, has the necessary flexibility and sufficient strength, and is easy to manufacture. The purpose is to provide a rotational force transmission means.

[Means for Solving the Problems] According to the present invention, the above object is to provide a rotational force transmitting means for flexibly coupling a driving shaft end and a driven shaft end that are coaxially arranged. The ends of the cylindrical body have a drive shaft end attachment section and a driven shaft end attachment section, respectively, and the cylindrical surface of the cylindrical body is divided into a plurality of sections in the circumferential direction, A rotational force transmitting means, characterized in that cuts along a plane orthogonal to the central axis direction of the cylindrical body are formed alternately on both sides in the circumferential direction in each of the divided parts, and a plate-shaped body. The central part and peripheral part of the drive shaft end are attached to one and the other of the driving shaft end part and the driven shaft end part, respectively, and the plate-shaped body is attached to the driving shaft or the driven shaft end part to which the central part is attached. The driven shaft is divided into a plurality of parts in the circumferential direction around the rotation center, and cuts along the cylindrical surface coaxial with the rotation center are formed in each divided part alternately from both sides in the circumferential direction. The rotational force transmitting means is characterized in that: the central part of the plate-shaped body is one of the drive shaft end attachment part and the driven shaft end attachment part; A gear is provided around the periphery of the drive shaft, and the gear engages with the gear of the driving shaft or driven shaft corresponding to the other side of the driving shaft end mounting section and the driven shaft end mounting section. The plate-like body is divided into a plurality of parts in the circumferential direction around the center of rotation of a driving shaft or a driven shaft, the end of which is attached to the center, and each divided part has a center of rotation. This is achieved by a rotational force transmitting means, characterized in that cuts along a cylindrical surface coaxial with the rotational force are formed alternately from both sides in the circumferential direction.

[Example] Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing a first embodiment of the rotational force transmitting means according to the present invention, FIG. 2 is a perspective view showing its assembled state, and FIG. 3 is a partial sectional view thereof. FIG. 4 is a diagram showing its usage state.

In these figures, 2 is a cylindrical body, and 4 and 6 are a driving shaft end attachment member and a driven shaft end attachment member that are attached to both ends of the cylindrical body 2 by bolts, respectively. 2a is the central axis of the cylindrical body 2.

The cylindrical body 2 includes a cylindrical portion 12 and flange portions 14 at both ends thereof.
It consists of 16. The cylindrical portion 12 includes eight dividing lines 18a to 18h at equal intervals along the central axis 2a, and these dividing lines form eight divided portions 20a to 20h divided in the circumferential direction.

Cuts 22 are formed in the divided portion 20a alternately on both sides in the circumferential direction. The cut is formed along a plane perpendicular to the central axis 2a. Therefore, the divided portion 20a is connected by a meandering member from the end on the driving shaft side to the end on the driven shaft side.

The other divided portions 20b to 20h have the same form as the divided portion 20a. And eight divided parts 20a to 20
h are connected and held by flange portions 14, 16 on the driving shaft side and the driven wheel side, respectively.

In addition, as shown in FIG. 4, in use, the drive shaft end is attached to the member 4, and the driven shaft end is attached to the member 6 by bolts to the drive shaft end 8 and the driven shaft end 10.
be combined with

In this embodiment, when the drive shaft end 8 rotates, the rotational force is transferred to the drive shaft end mounting member 4 and the drive shaft side flange 1.
4. The respective divided portions 20a to 20h of the cylindrical portion 12, the driven shaft side flange portion 16, and the driven shaft end attachment are transmitted to the driven shaft end portion 10 via the member 6. At this time, each of the above divided parts 2
0a to 20h function as meandering elastic bodies, and can therefore accommodate expansion and contraction in the thrust direction, eccentricity and deviation angle between the driving shaft and the driven shaft. In this embodiment, as the material of the cylindrical body 2, a material (for example, spring steel) that exhibits appropriate flexibility when formed into the meandering configuration as described above can be used.

The rotational force transmitting means of this embodiment is, for example, prepared in advance by preparing a cylindrical body without dividing lines or notches, and then adjusting the number of divided parts, the interval between the notches, and the circumferential length according to the desired deflection characteristics and transmission torque. The cylindrical body 2 is formed by determining the length, machining the parting line and the notch, and then attaching the cylindrical body 2 to the members 4 and 6 with bolts. In this way, with the means of this embodiment, if an unprocessed cylindrical body is prepared in advance, desired deflection characteristics can be obtained as needed. The above-mentioned dividing lines 18a to 18h and the notches 22 can be formed by machining (for example, milling) or the like.

In this embodiment, the cylindrical body 2 is attached to the member 4,
6 are constructed as separate bodies, but they can also be constructed integrally. Moreover, a prismatic cylindrical body can be used instead of a cylindrical body.

In this embodiment as described above, the cylindrical body 2 made of one piece is
Since each of the divided parts 20a to 20h functions as a meandering elastic body, there are few parts to be joined and installed, and sufficient strength and necessary flexibility can be obtained, and miniaturization can be easily achieved. becomes.

FIG. 5 is an exploded perspective view showing a second embodiment of the rotational force transmitting means according to the present invention, FIG. 6 is a perspective view showing its assembled state, and FIG. 7 is a side view thereof. In these figures, the same members as in FIGS. 1 to 4 are given the same reference numerals.

In this embodiment, the cylindrical body 2 does not have a flange portion, and is divided into three divided portions 2 by three dividing lines 18a to 18c.
0a to 20c are formed.

However, the dividing line does not reach both ends of the cylindrical body, and the mounting members 4 and 6 are connected to both ends by welding. FIG. 6 also shows the process.

This embodiment also has the same effects as the first embodiment.

FIG. 8 is a side view showing a third embodiment of the rotational force transmitting means according to the present invention. This figure corresponds to the above-mentioned FIG. 7. In FIG. 8, the same members as in FIG. 7 are given the same reference numerals.

In this embodiment, the circumferential length of each divided portion gradually decreases from the driving shaft side to the driven shaft side.

Therefore, in this embodiment, the deflection characteristics gradually change from the driving shaft side to the driven shaft side.

Thus, in this embodiment, effects similar to those of a composite spring are exhibited. A similar effect can be achieved not only by changing the length of the divided portion in the circumferential direction as in this embodiment, but also by changing the cutting interval in the axial direction, for example. Of course, this embodiment also has the same effects as the first embodiment.

In the first to third embodiments described above, the diameter of the cylindrical member is constant from the driving shaft side to the driven shaft side, but it is also possible to change the diameter continuously; in this case, Based on this change, it is also possible to realize the change in the deflection characteristics described above.

FIG. 9 is a perspective view showing a fourth embodiment of the rotational force transmitting means according to the present invention.

The present embodiment consists entirely of a disk-shaped body 32, in the center of which a driving shaft end attachment portion 34 is formed in an annular shape.
It is fixed to the end of the driving shaft by bolting. 30a is the rotation center of the driving shaft. Disc-shaped body 32
A driven shaft end attachment part 36 is formed in an annular shape around the periphery of the driven shaft, and is fixed to the driven shaft end by bolting.

The two mounting sections 34 and 36 are attached to the disc-shaped body 32.
In between, three fan-shaped divided portions 40a to 40a are formed by three dividing lines 38a to 38c radial to the rotation center 30a.
40c is formed.

Cuts 42 are formed in the divided portion 40a alternately from both sides in the circumferential direction. The cut is formed along a cylindrical surface coaxial with the rotation center 30a. Therefore, the divided portions 40a are connected by meandering members from the center to the periphery.

The other divided portions 40b and 40c also have the same form as the aforementioned divided portion 40a.

In this embodiment as described above, similarly to the first embodiment, each divided portion 40a to 40 of the disc-shaped body 32 made of one piece is
Since c is made to function as a meandering elastic body, the number of joints and attachments is small, sufficient strength can be obtained, necessary flexibility can be obtained, and miniaturization can be easily achieved. Furthermore, in this embodiment, similar to the third embodiment described above, the same effects as those of the composite spring are exhibited.

FIG. 10 is a partially cutaway perspective view showing a fifth embodiment of the rotational force transmitting means according to the present invention. In this figure, the ninth
Similar members in the figures are given the same reference numerals.

30 is a driving shaft, and the end of the driving shaft is bolted to a portion 34. In this embodiment, a gear 42 is fixed to the periphery of the disc-shaped body 32. The gear is adapted to mesh with a gear (not shown) attached to the driven shaft.

This embodiment is used to connect a driving shaft and a driven shaft through gear meshing, and its effects are similar to those of the fourth embodiment. However, in this embodiment, eccentricity refers to a deviation from a predetermined axial spacing.

〔Effect of the invention〕

As described above, according to the rotational force transmitting means of the present invention, each divided portion of the cylindrical body or the plate-shaped body functions as a meandering elastic body, so there are few parts for joining and mounting, and sufficient strength is achieved. This makes it possible to obtain the necessary flexibility and facilitate miniaturization. Further, if an unprocessed cylindrical body or plate-shaped body is prepared in advance, desired deflection characteristics can be easily obtained by processing parting lines and cuts as necessary. Furthermore, the effect of the composite spring can be easily obtained.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the rotational force transmitting means according to the present invention, FIG. 2 is a perspective view showing its assembled state, and FIG. 3 is a partial sectional view thereof. FIG. 4 is a diagram showing its usage state. FIG. 5 is an exploded perspective view showing a second embodiment of the rotational force transmitting means according to the present invention, FIG. 6 is a perspective view showing its assembled state, and FIG. 7 is a side view thereof. FIG. 8 is a side view showing a third embodiment of the rotational force transmitting means according to the present invention. FIG. 9 is a perspective view showing a fourth embodiment of the rotational force transmitting means according to the present invention. FIG. 10 is a partially cutaway perspective view showing a fifth embodiment of the rotational force transmitting means according to the present invention. 2: Cylindrical body, 2a: Central shaft, 4: Driving shaft end attachment is a member, 6: Driven shaft end attachment is a member, 8: Driving shaft, 10: Driven shaft, 12; Cylindrical part, 14.16: Flange parts 18a to 18h: dividing line, 20a to 20h: dividing part, 22: notch, 30: driving shaft, 30a: rotation center, 32: disc-shaped body, 34: driving shaft end mounting part, 36: driven Shaft end attachment: 388~38C: Partition line, 40a~40c: Divided part, 42: Notch. Figure 3 Figure 2 Figure 0b

Claims (7)

[Claims] (1) A rotational force transmitting means that flexibly connects a driving shaft end and a driven shaft end that are arranged coaxially, wherein both ends of the cylindrical body are connected to the driving shaft end attachment part and the driven shaft, respectively. The cylindrical surface of the cylindrical body is divided into a plurality of parts in the circumferential direction, and each divided part has a cut along a plane perpendicular to the central axis direction of the cylindrical body. A rotating force transmitting means characterized in that rotational force transmission means are formed alternately from both sides in the circumferential direction. (2) The rotational force transmission means according to claim 1, wherein the cylindrical body is a cylindrical body. (3) The rotational force transmitting means according to claim 1, wherein the cylindrical body has different diameters on the drive shaft end attachment side and the driven shaft end attachment side. (4) The rotational force transmitting means according to claim 1, wherein each divided portion has a deflection characteristic that changes from the drive shaft end attachment portion side to the driven shaft end attachment portion side. (5) The central part and the peripheral part of the plate-shaped body serve as one and the other of the driving shaft end attachment part and the driven shaft end attachment part, respectively, and the plate-shaped body has the end part attached to the central part. It is divided into a plurality of parts in the circumferential direction around the rotation center of the driving shaft or driven shaft, and each divided part has cuts along a cylindrical surface coaxial with the rotation center alternately from both sides in the circumferential direction. A rotational force transmitting means, characterized in that: (6) The rotational force transmitting means according to claim 5, wherein the plate-shaped body is a disc-shaped body. (7) The central part of the plate-shaped body serves as one of the driving shaft end attachment part and the driven shaft end attachment part, and a gear is provided at the peripheral part of the plate-shaped body, and the gear is the meshing part with the gear of the driving shaft or the driven shaft corresponding to the other side of the driving shaft end mounting part and the driven shaft end mounting part, and the plate-shaped body has an end in the center. It is divided into a plurality of parts in the circumferential direction around the rotation center of the driving shaft or driven shaft to be attached, and each divided part has cuts along a cylindrical surface coaxial with the rotation center, which are staggered from both sides in the circumferential direction. A rotational force transmitting means, characterized in that it is formed in.