JPH0755399Y2 - Decelerator - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a speed reducer, and more specifically,
The present invention relates to a device capable of driving a very large reduction ratio with a simple configuration.

<Prior Art> Conventionally used reduction gears include a gear type, a belt type, a chain type, and the like.
The structure was complicated and most of them were large.

<Problems to be Solved by the Invention> The present invention has been devised to solve the problem that the device has a large size, although it has a large reduction ratio as in the past. An object is to provide a reduction gear that is small and lightweight and has a large reduction ratio.

<Means for Solving Problems> In order to solve the above problems, the present invention secures the idle wheel (2) to one end of the power transmission shaft (1), and attaches the idle wheel (2) to the end surface of the idle wheel (2). One end of the crank arm (4) is axially mounted at a position eccentric from the center, and the other end of the crank arm (4) is axially mounted at an appropriate position on one surface of the disc-shaped leaf spring member (5). The leaf spring member (5) has a large number of irregularities on its circumference and is rotatably supported by the reduction shaft (8). The circle that meshes with the leaf spring member (5). A disk-shaped rotating member (9) having a large number of irregularities on its circumference is fixed to the reduction shaft (8), and the leaf spring member (5) and the rotating member (9) are included.
The concavo-convex meshing provided on each of the circumferential portions of the gear meshes only in one direction and is disengaged in the opposite direction, and the crank arm (4) displaces the meshing of the power transmission shaft (1). The rotary motion is converted into the reciprocating rotary motion of the leaf spring member (5), whereby the rotary member (9) fixed to the reduction shaft (8) can be decelerated and rotated in one direction.

<Operation> The power transmission shaft (1) is rotated by an electric motor or the like, and the idle wheel (2) is rotated accordingly. By the rotation of the idle wheel (2), the leaf spring member (5) makes a reciprocating rotary motion through the operation of the crank arm (4). The leaf spring member (5) and the rotating member (9) have a large number of concavities and convexities provided on the circumferential portions thereof meshing with each other, and with respect to the reciprocating rotational movement of the leaf spring member (5), The rotating member (9) rotates only in one direction. As a result, the deceleration shaft (8) performs decelerated rotation.

<Example> Hereinafter, description will be given with reference to the accompanying drawings.

The accompanying drawings all illustrate embodiments of the present invention. FIG. 1 is a front view showing an entire embodiment of the present invention. (M) is a motor, (1) is a power transmission shaft, (2) is an idle wheel, and (3) is an idle wheel (2). ), An eccentric shaft provided on the end surface of
(4) is a crank arm, and one end of the crank arm (4) is pivotally attached to the eccentric shaft (3). (5) is a leaf spring member in which irregularities are formed on a disk-shaped circumference, and a fixing pin (6) is provided at an appropriate position on the electric motor side of the leaf spring member (5). The other end of the crank arm (4) is pivotally attached to 6). The bent portion (7) of the leaf spring member 5 is a rotating member (9) fixed to the reduction shaft (8).
It meshes with. The rotating member (9) is screwed to the sleeve (10), and the sleeve (10) is fixed to the reduction shaft (8). Reference numeral (11) is a bearing, which supports the reduction shaft (8).

FIG. 2 is an explanatory view showing the movement of the idle wheel (2) and the crank arm (4), and is a view seen from the side of the leaf spring member (5) in FIG. An eccentric shaft (3) is provided via a bearing (12) at a position eccentric from the center of the end face of the idle wheel (2) fixed to the end of the power transmission shaft (1), and one end of the crank arm (4) is provided. Is attached to the eccentric shaft (3). The crank arm (4) is optimally a slightly curved one, and in this embodiment, two arms (13) and (13) are fixedly connected. Therefore, when the idle wheel (2) rotates, the eccentric shaft (3) makes a circular movement (arrow (A) in the figure) having a radius of the distance eccentric about the center of the idle wheel (2). Since the other end (14) of the crank arm (4) is pivotally attached to a fixing pin (6) provided on one surface of the leaf spring member (5), the other end of the crank arm is attached to the leaf spring member ( Along with 5), a reciprocating rotary motion (arrow (B) in the figure) is performed.

FIG. 3 is a cross-sectional explanatory view of the reduction shaft (8) side. Fixing pin (6) provided on the right side surface of the leaf spring member (5)
One end of the crank arm (4) is attached to the shaft. The bent portions (7) and (7) of the leaf spring member (5) are slightly bent toward the rotating member (9) and mesh with the rotating member (9). The leaf spring member (5) is fitted into the reduction shaft (8) by means of a shaft hole provided at the center of the leaf spring member (5), and a screw (17) is inserted through a holding plate (15) and a washer (16). ), The leaf spring member (5) is pressed against and supported by the rotary member (9). Rotating member (9)
Is fixed to a reduction shaft (8) through a sleeve (10) as shown in the drawing, and the reduction shaft (8) is supported by a bearing (11).

FIG. 4 is a perspective view of the leaf spring member (5), in which a large number of cuts (18) are provided in the disk-shaped circumference, and individual slices (19) are twisted to provide a space between the slices. The unevenness is provided. Further, notches at appropriate positions are provided long, and the bent portions (7) (7) ..., which are appropriate portions of the leaf spring member (5), are bent toward the side that meshes with the rotating member (9). Notches (18)
The interval can be set arbitrarily, but in the present embodiment, it is set to be equal to the reciprocating rotation distance of one end of the crank arm (4). Therefore, the power transmission shaft (1)
It is set so that the leaf spring member makes a reciprocating rotational movement for one section of the notch (18) when it makes one revolution. In this embodiment, the total number of cuts (18) is 232, and the number of cuts (19) is also 232. Therefore, when the power transmission shaft (1) makes one rotation, the leaf spring member (5) reciprocally rotates by the circumferential distance of one piece of the segment (19), and therefore the leaf spring member (5) and the teeth are rotated. The mating rotating member (9) rotates in one direction only for one segment.

FIG. 5 shows a rotating member (9) meshing with the leaf spring member (5).
And (20) is a shaft hole through which the reduction shaft is inserted, and four hole portions around it are screw insertion holes (21) for screwing the rotating member (9) into the sleeve (10). Is. In order to mesh with the leaf spring member (5) in the circumferential portion of the rotating member (9), a cut (2
2) is provided, and a twist is applied to each section (23) between each notch to form an uneven portion. The diameters of the leaf spring member (5) and the rotating member (9) are appropriately set according to the number of irregularities provided on the circumferential portion.

FIG. 6 is an explanatory view showing the meshing state of the leaf spring member (5) and the rotating member (9), and as shown in the drawing, each section (19) of the leaf spring member (5) and the rotating member (9). ) Each section (23)
, And the leaf spring member (5) is 1 only by the arrow (E) in the figure.
When reciprocally rotated, the rotating member (9) rotates by one segment in the direction of the arrow (F) in the figure.

Although one embodiment has been described above, the shape of the idle wheel (2) is completely arbitrary, and the eccentric distance of the eccentric shaft (3) is set to match the circumferential distance of one section of the leaf spring member (5). If desired, it can be set as desired, and thus the reduction ratio can be set arbitrarily. The shape of the crank arm (4) is completely free and can be appropriately set depending on the positional relationship between the eccentric shaft (3) and the fixing pin (6). For example,
If the fixing pin (6) is located to the left of the center axis of the leaf spring member (5) and the eccentric shaft (3) is located below the fixing pin (6), the crank arm (4) will be straight. It may be one. The leaf spring member (5) is also bent at a part of its peripheral portion, but the entire circumferential portion may be meshed with the rotating member (9). Further, the shape of the concavo-convex portion which is the joint portion of both the leaf spring member (5) and the rotating member (9) also has a plate shape in the rotating direction of the rotating member (9) due to the elasticity of the leaf spring member (5). The spring member (5) and the rotating member (9) are configured such that the irregularities on the peripheral edge thereof are in close contact with each other so that they do not slip, and both members slide in the direction opposite to the rotating direction of the rotating member (9), so that the plate It is only necessary that only the spring member (5) is rotated. Further, the shape of the sleeve (10) and the like can be set arbitrarily.

With the above configuration, the rotational movement of the power transmission shaft (1) is
The crank arm (4) converts the leaf spring member (5) into a reciprocating rotary motion, and the combination of the leaf spring member (5) and the rotating member (9) causes the rotating member (9) to make one segment in one direction. It rotates every time.

<Effects of the Invention> According to the speed reducer of the present invention, the reduction ratio can be arbitrarily set by the number of the uneven portions provided on the peripheral portions of the leaf spring member and the rotating member, and the rotation of the power transmission shaft makes one rotation of the uneven portion. It becomes one rotation, and a very large reduction ratio can be obtained by providing a large number of uneven portions. The reduction ratio of the above embodiment is
It is 1/232.

Therefore, unlike a conventional speed reducer, a large speed reduction ratio can be obtained with a simple configuration, and a great deal of effort is made to reduce the size and weight.

Further, as with the gear type, the play of the leaf spring member and the rotating member becomes zero. A desired reduction ratio can be set by the number of irregularities of the leaf spring member and the rotating member. A reduction ratio that cannot be easily indexed even by a gear type speed reducer using 5 to 6 gears can be easily extracted once by the number of irregularities such as a leaf spring member. In the case where the leaf spring member and the rotating member mesh with each other on the entire circumference, even if a strong member is manufactured, a light member can be used. By manufacturing the leaf spring member using an extremely thin plate, weight reduction can be pursued.

[Brief description of drawings]

The attached drawings all show one embodiment of the present invention. FIG. 1 is an overall front view thereof, FIG. 2 is an explanatory view showing movements of an idler and a crank arm, and FIG. 3 is a reduction shaft side. 4 is a partially omitted perspective view of the leaf spring member, FIG. 5 is a partially omitted perspective view of the rotary member, and FIG. 6 is an explanatory diagram showing a meshing state of the leaf spring member and the rotary member. Is. Symbols in the figure: (1) ... power transmission shaft, (2) ... idle car,
(4) …… Crank arm, (5) …… Flat spring member,
(8) ... Decelerating shaft, (9) ... Rotating member.

Claims (1)

[Scope of utility model registration request] 1. An idle wheel (2) is fixed to one end of a power transmission shaft (1), and one end of a crank arm (4) is axially attached at a position eccentric from the center of an end surface of the idle wheel (2). Then, the other end of the crank arm (4) is axially attached to an appropriate position on one surface of the disc-shaped leaf spring member (5), and the leaf spring member (5) has a large number of circumferential portions. A disc-shaped rotating member (9) having unevenness, rotatably supported by the reduction shaft (8), and having a large number of unevenness in the circumferential portion meshing with the leaf spring member (5). Consists of those fixed to the deceleration shaft (8) and provided on the circumferential portions of the leaf spring member (5) and the rotating member (9) respectively, the concavities and convexities mesh in only one direction, and vice versa. In that direction, the meshing is disengaged, and the crank arm (4) converts the rotational movement of the power transmission shaft (1) into the reciprocating rotational movement of the leaf spring member (5). , Thereby reduction gear anchored rotating member (9) so as to be decelerated rotation in one direction reduction shaft (8).