JPH0647514Y2 - Driving force transmission device for traveling toys - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a driving force transmission device provided in a traveling toy such as an automobile or a train.

[Conventional technology]

Generally, in traveling toys such as automobiles and trains, wheels are fixedly provided at both ends of a drive shaft driven by a motor or the like.

[Problems to be solved by the device]

When the running toy configured in this way is made to run on a curved line, no rotation difference occurs between the inner wheel and the outer wheel, so either wheel slips, and this resistance makes it difficult to run smoothly and the speed drops significantly. .

Therefore, an object of the present invention is to provide a driving force transmission device for a traveling toy capable of smoothly rotating a curved road at a high speed by causing a difference in rotation between an inner wheel and an outer wheel.

[Means for Solving the Problems]

To achieve the above object, the present invention provides an external gear that is fixed to a drive shaft, a wheel that is loosely fitted to the drive shaft, internal teeth that are formed on the entire inner surface of the wheel, and an idle gear that is attached to the drive shaft. A carrier to be fitted, a planetary gear that is rotatably supported by the carrier, and a rotation restricting member that is formed on the carrier, and the planetary gear has teeth that mesh with the internal teeth and the external gear. Is formed over approximately half the circumference and a cam surface is formed in the approximately remaining half circumference, and the rotation restricting member is configured to contact the cam surface when the rotation of the wheel is larger than the rotation of the drive shaft. When the rotation of the drive shaft is larger than the rotation of the wheel, the engagement between the teeth of the planetary gear and the internal teeth is released, and the rotation of the planetary gear is prevented by contacting the cam surface. Regulate and mesh the teeth of the planetary gears with the internal and external gears. Is characterized in that that allowed to hold state.

[Action]

With this configuration, when the rotation of the wheel is larger than the rotation of the drive shaft, the rotation restricting member is disengaged from the cam surface of the planetary gear and the contact with the cam surface is released. As the teeth of the planetary gears and the inner teeth of the wheel disengage, the drive force transmission state between the drive shaft and the wheel is released, the wheel rotates freely, and the rotation of the drive shaft becomes greater than the rotation of the wheel. When also becomes large, the rotation restricting member comes into contact with the cam surface of the planetary gear to restrict the rotation of the planetary gear, whereby the meshing state of the teeth of the planetary gear with the internal and external gears is maintained, The driving force is transmitted from the drive shaft to the wheel, and the wheel rotates integrally with the drive shaft.

Therefore, there is a difference in rotation between the inner and outer wheels when traveling on a curve,
Enables smooth high-speed curve running.

〔Example〕

An embodiment in which the present invention is applied to an automobile toy will be described below with reference to the drawings.

1 to 6 show a first embodiment of the present invention,
The vehicle 1 has guide walls 2 on both sides, as shown in FIG.
A four-wheel drive vehicle traveling on a traveling path 3 provided with 2 by driving a motor or the like (not shown).
The guide wheels 5, 5 that abut on the vehicle body 4 project from the vehicle body 4.

Front wheels 7, 7 are provided at both ends of the front drive shaft 6, and a rear drive shaft 8 is provided.
Rear wheels 9 and 9 are provided at both ends of the front wheel 7 and the rear wheel 9, respectively.
As shown in FIG. 6, a driving force transmission device 10 is attached to each of these.

Since the driving force transmission devices 10 have the same structure, they will be described on the rear wheel 9 side shown in FIGS. 1 and 2.

The driving force transmission device 10 includes an external gear 11 fixed to the drive shaft 8.
A wheel 13 that is loosely fitted to the drive shaft 8 and has a tire 12 fixed to the outer periphery, and an internal gear that is fixed to the inner periphery of the wheel 13 to form internal teeth on the entire inner periphery of the wheel 13. 14, a carrier 15 loosely fitted to the drive shaft 8, a shaft 15a of the carrier 15,
The planet gears 16, 16 rotatably supported by 15a and the carrier
Stoppers 15b, 15b formed on 15 as rotation regulating members
And a cover 17 which is attached to the carrier 15 and prevents the planetary gears 16, 16 pivotally supported by the shafts 15a, 15a from coming off.

The planetary gear 16 includes the teeth 11a of the external gear 11 and the internal gear 14
A tooth 16a that meshes with the tooth 14a is formed over substantially a half circumference, and a cam surface 16b is formed on a substantially remaining half circumference where the tooth 16a is not formed.

When the rotation of the wheel 13 is larger than the rotation of the drive shaft 8, the stopper 15b serving as a rotation restricting member releases the contact with the cam surface 16b as shown in FIG. And disengage the meshed state between the teeth 14a of the internal gear 14 and
When the rotation of the drive shaft 8 is larger than the rotation of the wheel 13, the planetary gear 1 comes into contact with the cam surface 16b as shown in FIG.
The rotation of 6 is restricted, and the teeth 16a of the planetary gear 16 and the teeth of the internal gear 14
14a and the tooth 11a of the external gear 11 are kept in mesh with each other.

The operation of the driving force transmission device 10 configured as described above will be explained. When the rotation of the drive shaft 8 is larger than the rotation of the wheel 13, as shown in FIG. By rotation in the counterclockwise direction in the figure, the planetary gear 16 rotates clockwise, and its teeth 16a mesh with the teeth 11a of the external gear 11 and the teeth 14a of the internal gear 14 in the planetary gear 16. The cam surface 16b comes into contact with the stopper 15b of the carrier 15 so that the planetary gear
16 rotations are restricted.

As a result, since the external gear 11 and the internal gear 14 are connected via the planetary gear 16, the drive shaft 8 and the wheel 13 rotate integrally, and the rotational driving force of the drive shaft 8 is transmitted to the tire 12. It

Next, when the rotation of the wheel 13 becomes larger than the rotation of the drive shaft 8, as shown in FIG. 4, the rotation of the tire 12 in the counterclockwise direction in FIG. Reversed from the state shown in the figure in the counterclockwise direction, the tooth 16a of the planetary gear 16 and the tooth 14a of the internal gear 14 are disengaged, the connection state between the external gear 11 and the internal gear 14 is released, and the drive is performed. The rotational driving force of the shaft 8 is not transmitted to the wheel 13, and the wheel 13 rotates freely.

By mounting the driving force transmission device 10 configured as described above on the front wheels 7 and the rear wheels 9 respectively, the planetary gears of the driving force transmission device 10 are mounted on the inner wheel side during the curved traveling shown in FIG.
The teeth 16a of 16 mesh with the teeth 11a of the external gear 11 and the teeth 14a of the internal gear 14, and the drive shaft 6 or the drive shaft 8 and the wheel 13 rotate integrally, so that the drive shaft 6 or the drive shaft 8 is rotated. Is transmitted to the front wheels 7 or the rear wheels 9.

On the other hand, on the outer wheel side, the rotation of the front wheel 7 or the rear wheel 9 is larger than the rotation of the drive shaft 6 or the drive shaft 8.
The tooth 16a of 16 and the tooth 14a of the internal gear 14 are disengaged, the connection state between the external gear 11 and the internal gear 14 is released, and the drive shaft 6
Alternatively, the rotational driving force of the drive shaft 8 is not transmitted to the wheels 13, and the front wheels 7 or the rear wheels 9 rotate freely.

Therefore, the vehicle 1 can perform smooth and stable high-speed curve traveling because a difference in rotation occurs between the inner wheel and the outer wheel during traveling on a curve.

FIG. 7 shows a second embodiment in which the present invention is applied to an automobile of a radio or remote control system. In an automobile 20, front wheels 21a and 21b are steerably provided and right and left rear wheels 22 are provided.
The motors 23a and 23b are provided so that a and 22b can rotate independently of each other, and the rear wheels 22a and 22b are provided with the driving force transmission device 10 of the first embodiment.

In this automobile 20, when the motor 23b of the rear wheel 22b on the inner wheel side in the figure is stopped during curved traveling, the rotation of the rear wheel 22b on the inner wheel side becomes larger than the rotation of the motor 23b.
The rear wheel 22b on the inner ring side freely rotates, and the rear wheel 22a on the outer ring side
Driving allows smooth curve travel.

As described above, by not transmitting the driving force to either the inner wheel or the outer wheel during the curved traveling, a difference in rotation is generated between the inner wheel and the outer wheel during the curved traveling, and smooth and stable high-speed curved traveling is enabled.

Although the above embodiments have been described as being applied to the driving force transmission device of an automobile, the present invention is also applicable to the driving force transmission device of a train or the like traveling on a track.

[Effect of device]

As described above, the driving force transmission device for a traveling toy according to the present invention is
An external gear fixed to the drive shaft, a wheel loosely fitted to the drive shaft, internal teeth formed on the entire inner surface of the wheel, a carrier loosely fitted to the drive shaft, and a carrier A planetary gear that is rotatably supported, and a rotation restricting member that is formed on the carrier, and the planetary gear has teeth that mesh with the internal teeth and the external gear over a substantially half circumference. A cam surface is formed on substantially the other half of the circumference, and when the rotation of the wheel is larger than the rotation of the drive shaft, the rotation restricting member releases the contact with the cam surface to form teeth of the planetary gear. When the rotation of the drive shaft is larger than the rotation of the wheel, the rotation of the planetary gear is restricted by contacting the cam surface, and the teeth of the planetary gear are It keeps the meshing state with the internal teeth and the external gear. Then, when the rotation of the wheel is larger than the rotation of the drive shaft, the rotation restricting member is disengaged from the cam surface of the planetary gear and the contact with the cam surface is released, whereby the planetary gear rotates and the planetary gear rotates. Since the tooth of the wheel and the inner tooth of the wheel are disengaged, the driving force transmission state between the drive shaft and the wheel is released, the wheel rotates freely, and the rotation of the drive shaft becomes larger than the rotation of the wheel. A rotation restricting member contacts the cam surface of the gear to restrict the rotation of the planetary gear, which keeps the teeth of the planetary gear in mesh with the internal and external gears, so that the drive shaft drives the wheel. The force is transmitted and the wheel rotates integrally with the drive shaft.

Therefore, by mounting such a driving force transmission device on the left and right wheels provided on the same drive shaft, respectively, a difference in rotation occurs between the inner wheel and the outer wheel during curved traveling, which enables smooth high-speed curved traveling.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention,
1 is an exploded perspective view of the driving force transmission device, FIG. 2 is a sectional view, FIG. 3 is an explanatory view of the driving force transmission device when the rotation of the drive shaft is larger than the rotation of the wheel, and FIG. FIG. 5 is an explanatory view of the driving force transmission device when the rotation of the wheel is larger than the drive shaft, FIG. 5 is a perspective view of a vehicle equipped with the driving force transmission device of the present invention, and FIG. FIG. 7 is a partial sectional plan view showing an operating state of the force transmission device, and FIG. 7 is a partial sectional schematic view showing a second embodiment in which the present invention is applied to a radio or remote control type automobile. 1,20 ... Car, 6,8 ... Drive shaft, 7,21a, 21b ... Front wheel, 9,22a,
22b ... rear wheel, 10 ... driving force transmission device, 11 ... external gear, 11a ...
Teeth of external gear 11, 12 ... Tire, 13 ... Wheel, 14 ... Internal gear, 14a ... Teeth of internal gear 14, 15 ... Carrier, 15a ... Shaft,
15b ... a stopper as a rotation restricting member, 16 ... a planetary gear, 1
6a: teeth of the planetary gear 16, 16b: cam surface of the planetary gear 16, 23a, 2
3b ... Motor

Claims (1)

[Scope of utility model registration request] 1. An externally toothed gear fixed to a drive shaft, a wheel loosely fitted to the drive shaft, inner teeth formed on the entire inner surface of the wheel, and a carrier loosely fitted to the drive shaft. And a planetary gear that is rotatably supported by the carrier, and a rotation restricting member formed on the carrier, and the planetary gear has teeth that mesh with the internal teeth and the external gear in a substantially half circumference. And the cam surface is formed on the remaining half circumference.
When the rotation of the wheel is larger than the rotation of the drive shaft, the rotation restricting member releases the contact with the cam surface to release the meshing state between the teeth of the planetary gear and the internal teeth. When the rotation of the drive shaft is larger than the rotation of the wheel, the rotation of the planetary gear is restricted by contacting the cam surface, and the teeth of the planetary gear are meshed with the internal and external gears. A driving force transmission device for a traveling toy, characterized in that it holds an object.