JPS63216277A - Brushless transmitter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is useful for transmitting signals, electric power, etc. between a rotating body with a finite number of rotations and a fixed body, such as a steering device of an automobile. This relates to the Plasirel transmission device used.

(Prior art) This type of conventional brushless transmission device is shown in FIGS. 3 to 5.
As shown in Figures (A) and (B), a first housing 1 and a second housing 2 each having a substantially cylindrical shape are combined concentrically and relatively rotatably. A substantially band-shaped flat cable 4 is spirally housed in the ring-shaped chamber 3, one end (outer end) 4A of the spiral flat cable 4 is fixed to the first housing ring 1, and the other end ( The inner end) 4B had a structure fixed to the second housing 2. The first housing 1 includes an inner cylindrical portion 5, a ring-shaped end plate 6 that protrudes from the outer periphery of the base end of the inner cylindrical portion 5, and covers one end of the flat cable 4 in the width direction. It is composed of an outer cylinder part 7 that protrudes concentrically from the inner cylinder part 5 on the outer periphery of the end plate part 6. The second housing 2 includes an inner cylindrical portion 9 that is fitted onto the outer periphery of the inner cylindrical portion 5 and to which the flat cable 4 is fixed with a fixing ring 8, and a protruding outer periphery of the proximal end of the inner cylindrical portion 9. It is composed of a ring-shaped end plate portion 10 that covers the @ end side of the flat cable 4 in the width direction.

1st. The second housing 1.2 is secured against handling by a projection 11.12 provided on each inner cylinder 5.9.

In such a brushless transmission device, the first housing 1 and the second housing 2 can rotate relative to each other within a range that allows the spiral flat cable 4 to be tightened or loosened. .

In this case, the rotatable range of, for example, the second housing 2, which acts as a rotor, is the state in which the flat cable 4 shown in FIG. ) to a state in which the flat cable 4 is wound approximately tightly around the outer cylindrical portion 7 (loosely wound state) as shown in FIG. 5(B).

Therefore, when assembling this device to the handle shaft, for example, the rotational position of 1/2 of the rotatable rotation speed of the handle should be made to match the rotational position of 1/2 of the rotatable rotation speed of the brushless transmission device. Needs to be assembled.

゛ 1st. In order to display how many rotations the second housing 1.2 has rotated from a rotation position of 1/2 of its rotatable rotation speed, conventionally, a display gear for displaying the rotation speed was attached to the fixed housing on a rotatable basis. The housing on the rotating side is provided with an operation protrusion that contacts the teeth of the display gear only once per rotation and rotates the display gear by one tooth.

(Problem to be Solved by the Invention) However, in such a structure, the operation protrusion comes into contact with the tooth of the display gear only once for each rotation of the rotating housing, and rotates the display gear by one tooth. Therefore, there were problems in that a tapping sound was generated when the operating protrusion came into contact with the display gear, and rotational resistance increased. Also,
In the conventional structure, when installing it on a vehicle, the first. There were problems such as the second housing 1°2 rotating, the center of rotation being shifted, and the flat cable 4 being broken.

An object of the present invention is to be able to display the rotation without producing a tapping sound, and to be able to assemble the first . An object of the present invention is to provide a brushless transmission device that can prevent relative rotation of a second housing.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to FIGS. 1 and 2 corresponding to the embodiments. A housing 1 and a second housing 2 are concentrically and relatively rotatably combined, and a flat cable 4 is housed in a spiral shape in a ring-shaped chamber 3 formed by both housings 1.2. One end is fixed to the first housing 1, the other end is fixed to the second housing 2, one of the first housing 1 and the second housing 2 is used as a stator, and the other is used as a rotor. In the brushless transmission device, the first
．． Teeth 13 are continuously formed on one of the second housings 1 and 2 over the entire circumference. A display gear 14 that meshes with the teeth 13 and displays the number of revolutions is rotatably supported on the other of the second housings 1.2, and is rotatably supported on the other of the second housings 1.2. The second housing 1.2 is characterized in that it is provided with temporary fixing means 19 for temporarily fixing both of them in a non-rotatable manner.

(Function) With this configuration, the circumferential teeth 13 of one housing 1 and the display gear 14 of the other housing 2 are always in mesh with each other, so that no hammering noise is generated during rotation. Also, 1st. Since the second housings 1 and 2 can be temporarily fixed by the temporary fixing means 19, it is possible to avoid a situation where the center of rotation shifts and the flat cable 4 is broken.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 and 2. In addition, the above-mentioned figures 3 to 5 (A)
Portions corresponding to those in (B) are shown with the same reference numerals. In this embodiment, the inner cylindrical portion 5 (the third
(see figure) is omitted. The outer cylinder part 7 of the first housing 1 is the ring-shaped end plate part 1 of the second housing 2.
Its height is determined so as to surround the outer periphery of the outer cylindrical portion 7, and teeth 13 are carved on the inner periphery of the upper end of the outer cylindrical portion 7 over its entire length. An indicator gear 14 is rotatably supported by a shaft 15 on the surface of the end plate portion 1o of the second housing 2 so as to mesh with this 6a13. The display gear 14 is prevented from being removed by a retaining plate 16 disposed thereon. The holding plate 16 is fixed to the second housing 2 by struts 17. A temporary fixing means 19 is provided on the holding plate 16 via an elastic connecting portion 18 . The temporary fixing means 19 is
In this embodiment, a base body 19A, a locking protrusion 19B protruding from the base body 19A and engaging with the teeth 13, and a locking protrusion 19B
The base body 19A includes a protrusion 19C protruding from the lower surface of the base body 19A for locking when the base body 19A is retracted to a position where the teeth 13 do not mesh with each other. After the locking protrusion 19B is retracted from the tooth 13, in order to fix the temporary fixing means 19 in the retracted position,
A hole 20 into which the projection 19C fits is provided in the second housing 2.

When such a brushless transmission device is in a rotational neutral state, which is a rotational position of 1/2 of the rotatable rotation speed, the rotational neutral display mark 21 on the first housing 1 and the rotational neutral display mark on the display gear 14 are 22 are aligned, and in this state, the locking protrusion 19B of the temporary fixing means 19 is engaged with the tooth 13, and the first. The second housing 1.2 is temporarily fixed so that it does not rotate relative to each other. Then, on the upper end surface of the outer cylinder part 7 of the first housing 1, there is an indicator gear 14 that faces the indicator mark 21 of the first housing 1 when the second housing 2 makes one rotation, two rotations, etc. The number of revolutions is indicated on the teeth (not shown).

Note that while this transmission device is in use, the protrusion 19C should not be engaged with the locking protrusion 19B/fi teeth 13 of the temporary fixing means 19.
is inserted into the hole 20 and locked.

In the above embodiment, the first housing 1 is provided with teeth 13,
Although the second housing 2 supports the display gear 14, the second housing 2 is provided with teeth 13, and the first housing 1
The display gear 14 may be supported by the display gear 14.

Further, in the above embodiment, the temporary fixing means 19 is supported by the holding plate 16, but the temporary fixing means 19 may be provided independently.

(Effects of the Invention) As explained above, in the brushless transmission device according to the present invention, the teeth in the circumferential direction of one housing and the display gear of the other housing are configured to always mesh with each other. This has the advantage that this will not occur. Also, 1st.
Since the second housing can be temporarily fixed by the temporary fixing means, it is possible to avoid a situation where the center of rotation is shifted and the flat cable is broken.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of a transmission device according to the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, FIG. 3 is a longitudinal sectional view of a conventional transmission device, and FIG. 4 is a longitudinal sectional view of the transmission device. Cross section of Figure 5 (A) (
B) is a cross-sectional view showing two types of states of the flat cable in the transmission device. DESCRIPTION OF SYMBOLS 1... First housing, 2... Second housing, 3... Chamber, 4... Flat cable, 13...
Teeth, 14... Display gear, 19... Temporary fixing means. Figure 1 Figure 2

Claims (1)

[Claims] A first housing and a second housing are concentrically and relatively rotatably combined, and a flat cable is spirally housed in a ring-shaped chamber formed by the two housings, and one end of the flat cable is connected to the first housing. fixed in the housing of
The other end is fixed to the second housing, and the other end is fixed to the second housing.
In a brushless transmission device in which one of the housing and the second housing is used as a stator and the other is used as a rotor, one of the first and second housings has teeth continuously over the entire circumference. is formed, the first,
A display gear that meshes with the teeth and displays the rotation speed is rotatably supported on the other of the second housings, and temporary fixation is provided on the first and second housings that temporarily fixes both of them in a non-rotatable manner. A brushless transmission device characterized in that a means is provided.