JPH05240Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) The present invention relates to the improvement of a rotation transmission device for a traveling toy. It was designed to prevent this from happening.

(Prior art and its problems) Various things have been proposed in the past regarding traveling toys and their damage prevention, and the present inventor also previously proposed the following:
We proposed a six-wheeled running toy as Jitsugan No. 59-025885. In the device proposed in the same application, the running wheels are composed of a front wheel, an intermediate wheel, and a rear wheel, and the rotational force of the flywheel is transmitted through a gear mechanism.
The power is transmitted to each of the wheels, and the axle of the front wheel is positioned higher than the axle position of the intermediate wheel and the rear wheel. At the same time, by making the overall shape of the toy roughly egg-shaped, even if the toy hits an obstacle such as a wall, it can change direction through a series of movements: standing up, falling over, rolling over, and getting up. be.

However, in such a toy, if the user applies a sudden input by, for example, rubbing the wheels against the floor in the running direction, a strong reversing force is applied to the gear mechanism for transmitting the rotational force,
If this is repeated, the teeth of the small diameter gear may wear out at the meshing portion between the large diameter gear and the small diameter gear, and other gear mechanism parts may be damaged.

For this reason, the present inventor previously proposed in Utility Application No. 60-32290 that the intermediate gear that transmits the rotation of the flywheel to the wheel rotation gear is composed of a large-diameter gear and a small-diameter gear, and the small-diameter gear is connected to the shaft. We proposed a mechanism that would allow slipping.

However, subsequent studies revealed that if the small-diameter gear and the shaft were repeatedly slipped, the small-diameter gear would become idle relative to the shaft, and rotation would no longer be transmitted.

The present invention was proposed as a result of studies to solve these conventional disadvantages.

(Means for solving the problems) As shown in FIGS. 1 to 7 corresponding to the embodiment, the present invention uses a flywheel 4 as a wheel drive source.
In the rotation transmission device for a traveling toy having a gear group for transmitting the rotational force of the flywheel 4 to the wheels, the intermediate gear 7 for transmitting the rotational force of the flywheel 4 to the wheel rotation gear has a large diameter. It is composed of a gear 40, a small diameter gear 42, and a washer rubber 41 installed between the large diameter gear 40 and the small diameter gear 42, and the small diameter gear 42 has a cap part 42a into which one end of the washer rubber 41 is inserted. At the same time, an anti-slip protrusion is formed on the end surface of the shaft portion 40a of the large diameter gear 40 to press against the other end surface of the washer rubber 41.
The large diameter gear 40 is fixed to the rivet shaft 43 by inserting the small diameter gear 42 into the rivet shaft 43, and the small diameter gear 42 can be slid onto the rivet shaft 43. It is pressed in the direction of the stopper part 44 formed in the.

(Operation) Rotation of the flywheel 4 is transmitted to the large diameter gear 40 of the intermediate gear 7 via the gear 6. In the normal state, the large diameter gear 40, the washer rubber 41, and the small diameter gear 42 rotate together due to the elastic force of the washer rubber 41 in the axial direction. The rotation of the intermediate gear 7 is transmitted to the wheel rotation gears 9, 10, and 14 via the gear 8, so that each of the wheels 1, 2, and 3 rotates. Furthermore, if the wheel is rotated rapidly and a sudden input is generated, only the small diameter gear 42 will slip on the riveted shaft 43, preventing strong repetitive force from being transmitted to the gear group meshing with the large diameter gear 40. There is.

Note that the washer rubber 41 does not rotate because the end surface on the large-diameter gear 40 side is sunk into the protrusion 40b formed on the shaft of the gear.

(Example) Specific examples of the present invention will be described below with reference to the accompanying drawings. First, Fig. 1 is a schematic plan view showing a wheel drive mechanism of a traveling toy according to the present invention, and Fig. 2 is a schematic plan view showing a wheel drive mechanism of a traveling toy according to the present invention. It is a conceptual diagram showing a combination.

The present invention has a total of six wheels symmetrically, with 1 and 1a being front wheels, 2 and 2a being intermediate wheels, and 3 and 3a being rear wheels.

These wheels are adapted to rotate by the rotational force of the flywheel 4. That is, a small diameter gear 5 is attached to the center of the flywheel 4, and the rotational force of the flywheel 4 is first transmitted to the first gear 6 via this small diameter gear 5.

The means for attaching the small-diameter gear 5 to the flywheel 4 is the same as that of Utility Model Application Publication No. 184898/1983, which was previously proposed by the inventor of the present invention. That is, as shown in FIGS. 3 and 4, the small diameter gear 5 has an S-shaped arm 3.
5 is provided, and locking pawls 31 are formed at both ends of the arm, and the small diameter gear 5 is rotatably passed through the shaft 30 of the flywheel 4, and a ring-shaped ratchet 32 is provided on the flywheel 4. When mounted, the locking pawl 31 is lightly pressed against the surface of the flywheel 4 by the inner diameter edge 33 of the ring-shaped ratchet 32. When the small diameter gear 5 rotates in the direction of the arrow in FIG.
The flywheel 4 also rotates at the same time, and the rotation of the flywheel 4 is transmitted to the succeeding gear.
When external force is applied to the small diameter gear 5, the engaging pawl 3
1 is removed from the claw portion 34 of the ratchet 32, and only the flywheel 4 is allowed to rotate independently.

The first gear 6 shown in FIG. 1 is a large diameter gear 6.
a and a small diameter gear 6b are integrally formed, the large diameter gear 6a meshes with the small diameter gear 5 of the flywheel, and the small diameter gear 6b meshes with the large diameter gear 40 of the second gear 7.
It meshes with.

As shown in FIGS. 5 and 6, the second gear 7 is composed of a large diameter gear 40, a shear rubber 41 such as urethane, and a small diameter gear 42 that meshes with a third gear 8, which will be described later. These are rivet shaft 4
3 are inserted in sequence.

As shown in FIG. 7, the small diameter gear 42 has a cap portion 42a formed at one end into which the end of the washer rubber 41 is inserted. The inner circumferential surface of this cap portion 42a is a rounded surface. Also,
A plurality of protrusions 40b are formed on the end surface of the shaft portion 40a of the large-diameter spur gear 40.

The small diameter gear 42 is inserted into the rivet shaft 43 so as to be able to slip thereon, and the large diameter gear 40 is fixed to the rivet shaft 43. Further, the intermediate washer rubber 41 is compressed between the large diameter gear 40 and the small diameter gear 42, and due to its elastic force, the small diameter gear 42 is pressed in the direction of the stopper portion 44 of the rivet shaft 43, and the small diameter gear 42 is pressed in the direction of the stopper portion 44 of the rivet shaft 43. 4
The protrusion 40b formed on the washer rubber 4
It is press-fitted into the end face of 1. Further, in the cap portion 42a of the small diameter gear 42, a washer rubber 41
The other end of the washer rubber 41 is press-fitted, and due to this compressive force, the other end of the washer rubber 41 becomes slightly swollen along the R surface of the inner peripheral surface of the cap.

In this example, the outer diameter of the rivet shaft is 1.5 mm.
The inner diameter of the rivet insertion hole of the small diameter gear 42 and the washer rubber 41 is 1.6 mm (the hardness of the washer rubber is 80°).
The inner diameter of the rivet insertion hole of the large diameter gear 40 is 1.4 mm.

The third gear 8 is a wheel 15 of the front wheels 1, 1a.
It meshes with a fourth gear 9 attached to the intermediate wheels 2, 2a, and also meshes with a fifth gear 10 fixed to the axles of the intermediate wheels 2, 2a.

The fifth gear 10 is a sixth gear 1 which is an intermediate gear.
1, and the sixth gear 11 meshes with the seventh gear 12.
Furthermore, the seventh gear 12 meshes with the eighth gear 13 in sequence, and the eighth gear 13 meshes with the ninth gear 14 attached to the rear wheel axle 17.

The gears 6, 8, 11, 12, 13 and the flywheel 4 are connected to the casing 21 and the partition frame 2.
0, and the intermediate gear 8 is pivotally connected to both sides of the casing 21 through the partition frame 20.

On the other hand, the front wheels 1 and 1a of the present invention
5 is another intermediate wheel 2, 2 as shown in FIG.
It is provided at a higher position (for example, about 1/4 of the diameter of each wheel) than the axle 16 of the wheel a and the axle 17 of the rear wheels 3 and 3a. Therefore, the intermediate wheels 2,2
When the front wheels 1 and 1a are in contact with the horizontal surface, the front wheels 1 and 1a are floating above the horizontal surface. In principle, this provides the same functionality as when the front wheels are made larger in diameter.

Further, in the present invention, a ballast storage section 20a is formed in the partition plate 20, and a required number of metal ballasts 19 are stored in the storage section 20a.
This ballast is for positioning the center of gravity of the toy body downward.

Note that a wheel 22 as shown in FIG. 1 is fixed to both ends of the axles 15, 16, 17 of each of the wheels, and a rubber tire is mounted on the wheel 22. Further, a body 50 as shown in FIGS. 8 and 9 is attached to the upper part of the casing 21. This body 50 is provided with a plurality of protrusions 51 to 57, and when the apexes of these protrusions are connected, they form an egg-shaped curve.

Next, an example of the operation of the toy according to the present invention described above will be explained.

First, if you forcefully rotate the intermediate wheels 2, 2a and the rear wheels 3, 3a by rubbing them against the floor, etc. (at this time, the front wheels 1, 1a are lifted off the floor, so they usually do not come into contact with the floor). ), the flywheel 4 rotates via each gear group described above. When the flywheel 4 rotates in this manner, the inertia of the flywheel 4 causes the gears to rotate, causing the wheels to rotate and travel. front wheel 1,
When 1a hits an obstacle, the toy main body changes direction and runs again through a series of movements of standing up, falling over, rolling over, and getting back up, as shown in FIGS. 10a to 10e.

In the present invention, when the user suddenly rubs the wheel in the direction of the arrow in FIG. 1 as described above, and a sudden input occurs, the small diameter gear 4 of the second gear 7
slips against the rivet shaft 43, causing the large diameter gear 40 to stop with a time delay. Therefore, it is possible to prevent the small diameter gear 42 from strongly rubbing against the gear 8 and causing wear and damage to the small diameter gear 42. In addition, it is possible to prevent sudden input from being applied to the first gear 6, the small diameter gear 5 attached to the flywheel 4, and the locking pawl 31 provided on this gear 5. 3
It is possible to prevent the two claw portions 34 from strongly rubbing against each other and causing wear and damage.

Furthermore, if the wheel suddenly rubs in the opposite direction after rotating at high speed, or if a finger or the like touches the wheel, the conventional ratchet-type safety mechanism installed in the flywheel 4 will be activated. That is,
The engagement relationship between the locking pawl 31 and the ratchet pawl 34 is released, and only the flywheel 4 will idle.

Above, the present invention was explained for a six-wheeled vehicle.
It goes without saying that the present invention may also be applied to other traveling toys such as four-wheeled vehicles. Further, the body shape, detailed structure, etc. are not limited to those shown in the drawings, and can be changed as necessary.

(Effects) According to the present invention described above, the intermediate gear that transmits the rotational force of the flywheel to the wheel rotation gear is configured as described above, so that, for example, the user suddenly moves the wheel forward. However, since the small-diameter gear slips, no excessive force is applied to the small-diameter gear or the subsequent gear mechanism, thereby preventing damage, wear, etc. to these mechanisms. In particular, when combined with a ratchet type safety mechanism, each safety mechanism will be activated against sudden forward and reverse movement of the wheels and all other operations.
In addition, the small diameter gear is always pressed toward the stopper part of the rivet shaft by the elastic force of the washer rubber, so even if the small diameter gear repeatedly slips and the rivet shaft insertion hole wears, the small diameter gear will not idle and the shaft will not rotate. It will rotate as one.

Furthermore, since the end of the small-diameter gear and the end of the washer rubber come into pressure contact at the cap part, they contact over a wider area than simply contacting their end faces. Since the protrusion presses into the other end surface of the washer rubber, rotation of the large-diameter gear can be reliably transmitted to the small-diameter gear. Furthermore, even if the small diameter gear slips and its ends rub against each other, the wear of the washer rubber or the small diameter gear can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the drive device of the invention, Fig. 2 is a conceptual diagram showing the combination of gears, Fig. 3 is a rear view of the ratchet mechanism of the invention, and Fig. 4 is a flywheel of the invention. 5 is a partial sectional view of the second gear of the present invention, FIG. 6 is an exploded perspective view of the second gear, and FIG. 7 is a small diameter of the second gear. FIG. 8 is a side view of the toy main body incorporating the device according to the present invention, FIG. 9 is a front view, and FIGS. 10 a to 10 e are diagrams for explaining the operation of the toy according to the present invention. It is a schematic diagram. In the figure, 1 and 1a are front wheels, 2 and 2a are intermediate wheels, 3 and 3a are rear wheels, 4 is a flywheel, 7 is a second gear, 40 is a large diameter gear, 40b is a protrusion, 4
1 is a washer rubber, 42 is a small diameter gear, 42a is a cap portion, 43 is a rivet shaft, and 44 is a stopper portion.

Claims (1)

[Claims for Utility Model Registration] A rotation transmission device for a traveling toy, which includes a flywheel as a wheel drive source and a gear group for transmitting the rotational force of the flywheel to the wheels, An intermediate gear that transmits data to the rotating gear is composed of a large diameter gear, a small diameter gear, and a washer rubber installed between the large diameter gear and the small diameter gear, and one end of the washer rubber is fitted into the small diameter gear. In addition to forming a cap portion, an anti-slip protrusion is formed on the end surface of the shaft portion of the large diameter gear to press against the other end surface of the washer rubber, and the large diameter gear, the washer rubber, and the small diameter gear are inserted into the rivet shaft, and the large diameter gear is The diameter gear is fixed to the rivet shaft, and the small diameter gear is allowed to slip on the rivet shaft, and the small diameter gear is pressed toward a stopper formed on the rivet shaft by the elastic force of the washer rubber. A rotation transmission device for a traveling toy, characterized by: