JPS6334717Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a drive wheel slip device for a toy car.

Conventionally, for this type of toy car, for example, the driving wheel device for a competitive model car described in Japanese Utility Model Publication No. 10306/1973,
-Toy wheels described in Publication No. 45437,
A differential device for a traveling toy described in Japanese Utility Model Application Publication No. 54-94594 has been proposed for various toy components, but for loads above a certain level, it is necessary to move the wheels on the drive axle. There has been no excellent drive wheel slip device for a toy car that is configured to prevent burnout of the drive motor and damage to the speed reduction mechanism etc. by causing the drive motor to spin idly.

Therefore, in order to achieve the above-mentioned purpose, this invention forms a drive axle with a collar around the center in the axial direction, and inserts a coil spring into one end of the drive axle. , this one end is rotatably inserted into the shaft support hole of the wheel, and a fixed ring is fixed to one end of the drive axle to prevent the wheel from coming off the drive axle, and the coil spring is inserted into the spring housing recess of the wheel. The coil spring is housed in the coil spring and compressed between the flange of the drive axle and the inner surface of the spring housing recess, and the elastic force of this coil spring causes the wheel to be constantly pressed against the fixed ring, causing friction that causes the drive axle to The rotation can be transmitted to the wheels, the other end of the drive axle is rotatably inserted into the shaft support of the direction changing swing frame, and an engagement ball is fixed to the other end of the drive axle to change the direction of the drive axle. The gist is that the swing frame is configured to prevent the swing frame from coming off the pivot support.

An embodiment in which this invention is applied to the front wheels of a four-wheel drive toy car will be described below.

In the figure, 1 has a flange 2 located approximately at the center in the axial direction.
This is a drive axle formed by surrounding the drive axle 1.
A wheel 3 is rotatably disposed on one end of the holder. The wheel 3 includes a shaft support hole 4 through which the drive axle 1 is inserted;
A spring accommodating recess 6 is provided to be continuous with the shaft support hole 4.

A coil spring 7 is attached to one end of the drive axle 1.
The coil spring 7 is fitted onto the wheel 3.
The spring accommodating recess 6 of the flange 2
The wheel 3 is arranged on the drive axle 1 so as to be compressed between the spring accommodating recess 6 and the recess inner surface 5 of the spring accommodating recess 6. still,
The wheels 3 are attached to the drive axle 1 by fixing a fixed ring 1A to one end of the drive axle 1, thereby preventing the wheels 3 from coming off the drive axle 1.

The drive axle 1 with the wheels 3 attached thereto is rotatably supported at its other end on the shaft support 14 of the direction changing swing frame 8, and has an engagement ball 9 as a universal joint at the other end. It is configured to be firmly fixed and to prevent the drive axle 1 from being removed from the shaft support 14 of the direction changing swing frame 8.

Furthermore, the wheel 3 is constantly pressed against the fixed ring 1A by the elastic force of the coil spring 7, and the rotation of the drive axle 1 is transmitted to the wheel 3 due to the friction generated between the wheel 3 and the fixed ring 1A.

Further, the engagement ball 9 has an engagement pin 10 protruding from a spherical surface so as to be orthogonal to the drive axle 1.
An engagement tube 11 is fitted into the engagement ball 9. An engagement notch 12 into which the engagement pin 10 is fitted is formed on the circumferential surface of the engagement tube 11 at the end where the engagement ball 9 is fitted, and the other end A driven gear 13 is fixed to the portion.

The direction conversion swing frame 8 includes a shaft support 14 that pivotally supports the drive axle 1, a swing frame main body 15 that is continuous with the shaft support 14 and in which the engagement ball 9 is disposed as a hollow structure. An engaging ball 9 is provided on the circumferential surface of the swing frame body 15.
It consists of a pair of pivot pins 16 that protrude in a direction perpendicular to the drive axle 1 portion to which the drive axle is fixed, and a swing pin 17 that protrudes in parallel to the pivot pins 16.

A pivot pin hole 19 into which the pivot pin 16 is rotatably fitted is formed in the base plate of the toy chassis 18, and the swing pin 1 is inserted into the pivot pin hole 19.
A holding frame 20 is provided, in which the pivot pin 16 on the side where the numbers 7 are formed in parallel is rotatably fitted, and the pivot pin holes 19 are formed at both ends of the holding frame 20. The holding frame 20 is attached to the toy chassis 18 by fitting the other pivot pin 16 into the pivot pin 19, and the direction changing swing frame 8 is pivotally attached to the toy chassis 18.

An intermediate gear 21 that meshes with the driven gear 13 is pivotally supported on the toy chassis 18, and this intermediate gear 21 is connected to a drive shaft 23 having a rectangular cross section and an end of this drive shaft 23 from a rear wheel drive mechanism 32, which will be described later. a fitted crown gear 24, an intermediate gear 25 meshing with the crown gear 24,
Furthermore, drive is obtained through a transmission gear train consisting of a reduction gear 26 meshing with the intermediate gear 25 and the like.

On the other hand, a rocking plate 28 having rocking pin holes 27 formed at both ends is fitted into each of the rocking pins 17 of the direction changing rocking frame 8 disposed on the left and right sides of the toy chassis 18. Arrange it like this. A known direction changing mechanism 40 connected to the receiver 29 is mounted in the center of the swing plate 28, such as one that swings the direction changing pin 30 at a certain angle by rotating a motor (not shown) in forward and reverse directions. An engagement elongated hole 31 into which the direction changing pin 30 fits and engages is formed.

The rear wheel drive mechanism 32 is configured by a pivot pin 34 protruding from the frame of the rear wheel drive mechanism 32 along the center line of the toy chassis 18 so that the rear wheels 33 are perpendicular to the center line of the toy chassis 18. It is pivotally supported on the toy chassis 18 and consists of a motor that is controlled by a receiver 29 to rotate in forward and reverse directions, and a known reduction gear train that transmits the drive of this motor to the rear wheels 33.

The frame 35 in this embodiment is configured as a radio wave probe, and by sliding a part of the roof forward, an antenna 37 formed of a coil spring, a radio wave probe 38, The seat 39 and the like are made to protrude by the elastic force of a built-in coil spring 41.

Therefore, the drive wheel slip device according to this invention has a drive axle 1 having a collar 2 surrounding it approximately at the center in the axial direction, and a coil spring 7 inserted at one end of the drive axle 1. Then, this one end is rotatably inserted into the shaft support hole 4 of the wheel 3, and the fixed ring 1A is fixed to one end of the drive axle 1,
In addition to preventing the wheel 3 from coming off the drive axle 1, the coil spring 7 is accommodated in the spring housing recess 6 of the wheel 3, and the flange 2 of the drive axle 1 and the inner surface 5 of the spring housing recess 6 are connected to each other. This coil spring 7 is compressed between
The rotation of the drive axle 1 can be transmitted to the wheel 3 by the friction generated when the wheel 3 is constantly pressed against the fixed ring 1A by the elastic force of It is rotatably inserted into the support 14, and an engagement ball 9 is fixed to the other end of the drive axle 1 to prevent the direction conversion swing frame 8 of the drive axle 1 from being removed from the support 14. Therefore, the configuration is simple,
The coil spring 7 can be formed compactly, and furthermore, the coil spring 7 can be completely accommodated in the spring housing recess 6 of the wheel 3, giving a very good appearance and also being able to reliably prevent damage to the coil spring 7 itself. . In addition, when a load greater than the output of the drive motor is applied to the wheels 3 while the toy is running, the elastic force of the coil spring 7 is generated between the fixed ring 1A fixed to the drive axle 1 and the wheel 3. Since it slips against friction and spins idly, it is possible to reliably prevent burnout of the drive motor and damage to the reducer, etc. In addition, in normal cases, the rotation of the drive axle 1 rotated by the drive motor is controlled by the coil spring. 7, the signal can be reliably transmitted to the wheels 3.

Moreover, the coil spring 7, the collar 2 and the fixed ring 1A
It can be implemented with a simple configuration of a drive axle 1 to which is fixed a wheel 3 having a recessed inner surface 5, and can be easily manufactured and provided at a low cost.

In particular, since the fixed ring 1A is fixed to one end of the drive axle 1 and the engagement ball 9 is fixed to the other end of the drive axle 1, it is possible to reliably prevent the wheel 3 from coming off the drive axle 1, and Since the driving axle 1 can be reliably prevented from coming off the direction changing swing frame 8, and the wheels 3, the driving axle 1, and the direction changing swing frame 8 are integrally connected to each other, Formed in advance as one component in the toy,
The work of attaching the toy to a car becomes extremely easy, and the work of assembling the toy itself can be further simplified.

In the example, the process was carried out only on the front wheels of a four-wheel drive toy car, but the process is not limited to this and may also be applied to the rear wheels, and may also be applied to other rear-wheel drive or front-wheel drive toy cars. Of course, it may be adopted.

As explained above, according to this invention, a drive wheel slip device for a toy car can be provided with an extremely simple configuration, and moreover, it is possible to reliably prevent burnout of the drive motor and damage to the reducer. This is an extremely useful idea in practice.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is an overall partially cutaway front view of the front wheel drive section of a four-wheel drive toy car, Figure 2 is a plan view of the same, Figure 3 is a partially omitted side view of the same, Figure 4 is an exploded perspective view of the same, and Figure 5 The figure is an overall side view of a toy car implementing this invention, and FIG. 6 is a partially cutaway side view of the same. 1... Drive axle, 1A... Fixed ring, 2... Tsuba,
3...wheel, 4...shaft support hole, 5...recess surface, 6
... Spring housing recess, 7 ... Coil spring, 8 ... Direction conversion swing frame, 9 ... Engagement ball, 10 ... Engagement pin, 11 ... Engagement tube, 12 ... Engagement notch, 13 …
... Driven gear, 14 ... Axial support, 15 ... Swing frame body, 16 ... Pivot pin, 17 ... Swing pin, 18
...Toy chassis, 19...Pivot pin hole, 20...
...Holding frame, 21... Intermediate gear, 23... Drive shaft,
24... Crown gear, 25... Intermediate gear, 26... Reduction gear, 27... Rocking pin hole, 28... Rocking plate,
29...Receiver, 30...Direction changing pin, 31...
...Elongated engagement hole, 32...Rear wheel drive mechanism, 33...Rear wheel, 34...Pivot pin, 35...Frame,
36...Opening, 37...Antenna, 38...Radio probe, 39...Seat, 40...Direction changing mechanism, 41...Coil spring.

Claims (1)

[Scope of utility model registration request] A drive axle is formed with a collar around the center in the axial direction, a coil spring is inserted into one end of the drive axle, and this one end is rotated into the shaft support hole of the wheel. In addition to being freely inserted, a fixed ring is fixed to one end of the drive axle to prevent the wheel from being removed from the drive axle. The rotation of the drive axle can be transmitted to the wheel by the friction generated when the wheel is constantly pressed against the fixed ring by the elastic force of this coil spring, and the other end of the drive axle At the same time, an engagement ball is fixed to the other end of the drive axle to prevent the drive axle from coming out of the shaft support of the direction change swing frame. A drive wheel slip device for a toy car, characterized in that the slip device comprises: