JPH04871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a toy wheel whose rotational speed can be changed by switching the rotational direction of the axle.

[Prior Art] Conventionally, when changing the rotational speed of wheels in a traveling toy powered by a motor or the like, it is common practice to change the rotational speed of the motor or incorporate a transmission into the power transmission mechanism to the axle. As a transmission device, for example, a gear mechanism is known in which the rotation speed of an output shaft changes when the rotation of a motor is reversed.

[Problems to be solved by the invention] However, when changing the rotation speed of the motor, a circuit is required to change the voltage supplied to the motor, which complicates the wiring. It cannot be applied to moving toys (wind-up type). In addition, the above-mentioned transmission device is
This has the problem of complicating the power transmission mechanism from the power source to the axle and requiring space for storage, which cannot be incorporated into toys that do not have enough space.

[Means for Solving the Problems] The present invention has been made in view of the above problems, and by incorporating into the wheels a mechanism that changes the rotation speed simply by changing the direction of rotation of the axle, it is possible to improve the speed of the running toy. The object of the present invention is to provide a wheel that can change speed without complicating the internal mechanism of the wheel.

Therefore, the toy wheel according to the present invention includes an input shaft to which rotational force from the drive source of the toy is transmitted, a hollow tire part rotatably attached around the input shaft, and an integral part with the tire part. two gears provided with different numbers of teeth, a moving gear disposed so as to be movable between two positions for transmitting rotation of the axle to each of the two gears, and a worm rotating in conjunction with the input shaft. , and a swinging member arranged to swing freely, one end of which engages with a worm and the other end of which engages with a moving gear. is configured to swing and move the moving gear from one of the two positions to the other.

[Example] Hereinafter, an example of the present invention shown in the drawings will be described.

FIG. 1 is a perspective view of the toy wheel of the present invention seen from the side to which the rotational force from the drive source of the toy is transmitted. It is constructed by incorporating a transmission switching mechanism 3. As shown in FIG. 2, the tire part 2 is open on one side, and an internal gear 4 is provided on the annular inner peripheral surface, while an external gear 5 is provided in the center of the opposite wall.
are integrally formed, and a hole 6 penetrating to the outside is provided in the center. The rotation transmission switching mechanism 3 is
It has a pair of discs 7 and 8 formed so as to be housed inside the tire part 2. These disks are connected in parallel to each other by interposing an appropriate number of connecting rods 9 of a predetermined length and screwed together, and rotate integrally with the input shaft 10 of the wheel 1 (FIG. 3) between them. a gear 11 that rotates, a gear 12 that meshes with this and rotates,
A swinging member 16 whose central portion is rotatably attached to a worm 13 formed integrally with the gear and a support beam 14 provided between both discs and which is tensioned by a spring 15 is disposed.

The disc 7 forming the inner surface of the toy wheel 1 is provided with a substantially square frame-shaped protrusion 17, and the base end of the input shaft 10, which rotatably passes through the center of the disc 7, is provided therein. A cross protrusion 10a formed on the portion is disposed. The rotational force from the drive source of the toy is transmitted to the input shaft 10 by fitting the cross groove 18a formed at the tip of the rotation transmission shaft 18 into the cross protrusion 10a of the input shaft 10.

On the other hand, in the center of the outer disc 8, an external gear 5 is provided when the rotation transmission switching mechanism 3 is incorporated into the tire part 2.
A circular hole 19 larger than the outer diameter of the gear is bored in order to pass through the gear.

FIG. 3 shows the internal structure of the toy wheel 1. Inside the tire part 2, the external gear 5 of the tire part 2 is passed through the hole 19 of the outer disc 8 of the rotation transmission switching mechanism 3,
With the inner disk 7 close to the side surface of the internal gear 4, the tip of the input shaft 10 is inserted into the center hole 6 of the tire portion 2.
The tire part 2 is connected to the input shaft 10 by inserting and coupling it into the cylindrical member 20 which is rotatably arranged in the cylindrical member 20 and by screwing the screw 22 into the cylindrical member 20 from the outside of the tire part 2 via the washer 21. It is attached so that it can rotate freely.

The gear 11 coupled to the input shaft 10 so as to rotate integrally has the same outer diameter and the same number of teeth as the external gear 5 of the tire section 2, and when incorporated into the tire section 2, the gear 11 has the same outer diameter and the same number of teeth as the external gear 5 of the tire section 2. close to the side of the A moving gear 23 that can mesh with the gear 11 and the external gear 5 at the same time is provided so as to be movable along a support shaft 24 that projects between the pair of discs 7 and 8. Moreover, when this moving gear 23 moves to a position close to the inner disc 7 as described later (the seventh
A gear 25 that meshes with this is rotatably provided around a support shaft 26 that projects from the disk 7, and this gear 25 meshes with the internal gear 4 of the tire portion 2. On the other hand, the gear 12 that meshes with the gear 11 at a position opposite to the moving gear 23 and the worm 13 integrated therewith are attached to a support shaft 27 protruding from the outer disk 8.
It is rotatably installed around the

Next, as shown in FIGS. 4 and 5, the swinging member 16 is composed of a band plate curved in an arc shape along the gear 11, and has a pointed portion 16a at one end and a substantially U-shaped portion at the other end. The holding portions 16b are formed respectively, and
The central portion is rotatably attached to the support beam 14 via a support shaft 28. One end of a spring 15 is fixed between the tip 16a and the center of the swinging member 16, and the other end of the spring 15 is fixed to a protrusion 29 extending from the disc 8. Point 1 of swinging member 16
6a engages with the worm 13, and the clamping portion 16b rotatably clamps the moving gear 23.

Since the toy wheel 1 shown in FIG. 1 is constructed as described above, its operation is as follows.

First, when the input shaft 10 rotates in the direction shown by the arrows A and B in FIG. 6 (clockwise in FIG. 4) (hereinafter referred to as normal rotation), the gear 11 and the Gear 1 meshing with this
2 causes the worm 13 to rotate in the opposite direction.
Therefore, the tip 16a of the swinging member 16 moves to the right end of the peak of the worm 13 as shown in FIG. 6B, and remains pulled to the left by the spring 15 as long as the rotation continues. It is stopped at the right end of the worm 13. On the other hand, the holding part 16b of the swinging member 16 is located on the left side as shown in FIG. 6A,
The moving gear 23 is meshed with the gear 11 and the external gear 5. Therefore, the external gear 5 rotates in the same direction as the input shaft 10, and the tire portion 2 also rotates in the same direction.

Next, when the input shaft 10 rotates backward from the forward rotation state in the direction shown by the arrow in FIG. 7 (counterclockwise in FIG. 4), the gear 11 integrated with the input shaft 10 and the gear 12 meshing with it Warm 1 through
3 is also reversed, so the tip 16a of the swinging member 16 moves to the left end along the mountain of the rotating worm 13, and as long as the rotation continues, it is now moved by the spring 15 as shown in FIG. 7B. It is stopped at the left end of the worm 13 while being pulled to the right. On the other hand, the holding portion 16b of the swinging member 16
Since it is located on the right side as shown in FIG. A, the movable gear 23 moves away from the external gear 5 while still meshing with the gear 11, and now meshes with the gear 25. Therefore, the internal gear 4 rotates counterclockwise in FIG. 4, and the tire portion 2 also rotates counterclockwise. In this case, since the number of teeth of the internal gear 4 is greater than the number of teeth of the external gear 5, the reverse rotation speed of the wheel 1 is slower than the normal rotation speed.

When the input shaft 10 returns to normal rotation from this reverse rotation state, the swinging member 16 returns to the position shown in FIGS. It becomes rotation.

Thus, according to the illustrated embodiment, the input shaft 1
When the rotation direction of the worm 16 changes, the tip 16a of the swinging member 16 moves from the right end to the left end or from the left end to the right end of the worm 13, and the gripping part 16 of the swinging member 16 moves.
The movable gear 23 held between the wheels b is moved along the support shaft 24 from left to right or from right to left. The moving gear 23 is always in mesh with the gear 11 that rotates together with the input shaft 10, but when it is located on the left (FIGS. 3 and 6A), it meshes with the external gear 5 and rotates the input shaft 10. The rotation of the input shaft 10 is transmitted to the external gear 5, and when it is located to the right (FIG. 7A), it meshes with the gear 25 and transmits the rotation of the input shaft 10 to the internal gear 4.

Therefore, the toy wheel 1 of the embodiment has the external gear 5
The rotational speed changes according to the difference in the number of teeth of the internal gear 4 and the internal gear 4, and by appropriately determining the ratio of the number of teeth of both gears, an arbitrary speed change can be realized. Furthermore, by omitting the gear 25 that meshes with the internal gear 4 and creating a structure in which the moving gear 23 directly meshes with the internal gear 4, even if the rotation direction of the input shaft or the wheel changes, the rotation direction of the wheel remains unchanged. It is also possible to change only the rotational speed without changing it.

[Effects of the invention] As described above, according to the invention, a mechanism that changes the rotation speed simply by switching the rotation direction of the rotation input shaft to the wheel is incorporated into the wheel, and therefore the toy It is possible to provide a traveling toy that can change speed without complicating the internal structure of the main body.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the toy wheel of the present invention, Fig. 2 is a perspective view of the tire portion and rotation transmission switching mechanism constituting the toy wheel of Fig. 1, and Fig. 3 is a perspective view of the toy wheel of the present invention.
4 is a sectional view taken along the center of the toy wheel shown in FIG. 7A and 7B are partial cross-sectional views showing the internal state of the toy wheel of FIG. 1 during normal rotation and reverse rotation, respectively, from different angles. DESCRIPTION OF SYMBOLS 1... Wheel, 2... Tire part, 3... Rotation transmission switching mechanism, 4... Internal gear, 5... External gear, 6
... Hole, 7, 8 ... Disc, 9 ... Connecting rod, 10 ...
...Input shaft, 11, 12...Gear, 13...Worm, 14...Support beam, 15...Spring, 16
... Swinging member, 17 ... Protrusion, 18 ... Rotation transmission shaft, 19 ... Circular hole, 20 ... Cylindrical member, 21 ...
... Washer, 22 ... Screw, 23 ... Moving gear,
24... Support shaft, 25... Gear, 26, 27, 28
...Spindle, 29...protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) An input shaft to which rotational force from a drive source of a toy is transmitted, a hollow tire portion rotatably attached around the input shaft, and an integral part of the tire portion. two gears with different numbers of teeth provided in the input shaft, and a moving gear arranged to be movable between two positions for transmitting the rotation of the input shaft to each of the two gears;
A worm that rotates in conjunction with the input shaft; and a rocking member that is swingably arranged so that one end engages with the worm and the other end engages with the moving gear, and the swing member rotates in conjunction with the input shaft. A toy wheel characterized in that the swinging member swings due to the rotation of the worm which changes simultaneously with a change in direction, thereby moving the moving gear from one of the two positions to the other. (2) One of the two gears is formed on the inner peripheral surface of the tire portion, and the other is formed on the outer peripheral surface of the center portion of the tire rotatably attached to the input shaft. The toy wheel described in item 1.