JPS6245757Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a four-wheel drive device for a traveling toy.

Its purpose is to have a simple configuration,
Moreover, the object of the present invention is to provide a four-wheel drive running toy that has a small turning radius and can turn in a small radius. The gist of this is that in a four-wheel drive system for a traveling toy, a differential gear train is disposed on each of the rear wheel axle and the front wheel axle, and these differential gear trains are connected to an axle-fixed bevel gear fixed to the axle. An axle rotating bevel gear that is rotatable on the axle is arranged on the axle so that its tooth surfaces face each other, and an intermediate bevel gear that meshes with these bevel gears is pivotally supported between these bevel gears. The plate is arranged to be rotatable with respect to the axle, and on the side of the holding plate next to the axle-fixed bevel gear, there is a driven bevel gear with a notch formed therein to accommodate the axle-fixed bevel gear so as to cover the axle-fixed bevel gear. A wheel is arranged and configured, and the axle is fixed to one end of the rear wheel axle where the axle-fixing bevel gear is disposed, and the axle is fixed to the other end of the rear axle, and the wheel is non-rotatably connected to the axle rotating bevel gear at the opposite end of the axle. is arranged so as to be rotatable about the axle, and the swing axle is pivotally supported by a swing frame that is swingably pivoted to the frame, and a wheel is fixed to the outer end of the swing axle. At the same time, an engagement ball having an engagement pin formed on a spherical surface is fixed to the inner end thereof in a direction perpendicular to the rocking axle,
An engagement tube that has an engagement notch that engages with the engagement pin of the engagement ball and fits onto the engagement ball is provided, and one of the engagement tubes is connected to the axle-fixing bevel gear of the front wheel axle. The other end of the engagement tube is fixed to the shaft end, and the other end of the engagement tube is unrotatably connected to the axle rotation bevel gear, and this engagement tube is arranged at the axle shaft end so as to be rotatable with respect to the axle, and the rear wheel axle and the front wheel The driven bevel gear connected to the axle is meshed with bevel gears at both ends of a drive rod which is connected to a drive mechanism and has drive bevel gears fixed to both ends.

An embodiment of this invention will be described below based on the drawings.

In the figure, 1 is a differential gear train arranged on a rear wheel axle 2 and a front wheel axle 3. This differential gear train 1
, an axle-fixed bevel gear 4 fixed to the axles 2 and 3 and an axle rotating bevel gear 5 rotatable about the axle are arranged so that their tooth surfaces face each other, and these bevel gears 4 and 5 A holding plate 7 is disposed in between, on which an intermediate bevel gear 6 that meshes with these bevel gears 4 and 5 is rotatably supported in a direction perpendicular to the axles 2 and 3. A driven bevel gear 8 is formed on the side surface of the holding plate 7 next to the axle fixed bevel gear 4 with a storage notch 8A for storing the fixed bevel gear 4 therein so as to cover the axle fixed bevel gear 4.
Deploy and configure.

Wheels 9 are disposed on the rear wheel axle 2 and the front wheel axle 3 on which the differential gear train 1 configured as described above is disposed. In the case of the rear wheel axle 2, a fitting shaft portion 5A is provided by forming the circumferential surface of the end portion of the rotating bevel gear 5 opposite to the tooth surface forming end portion into a hexagonal shape. 5A
is fitted into a hexagonal fitting hole 9A formed in the wheel 9, and the wheel 9 and the rotary bevel gear 5 are unrotatably connected and arranged, and the axle fixed bevel gear 4 of the axle 2 is The wheels 9 are fixed and arranged at the end of the arrangement side by press-fitting or the like. In the figure, reference numeral 31 denotes a fixed ring that prevents the rotary bevel gear 5 or the wheel 9 from coming off the axles 2 and 3.

The arrangement on the front wheel axle 3 is carried out in substantially the same manner as the arrangement on the rear wheel axle 2. However, the front wheel 9
has the function of a driving wheel and a direction changing wheel, so the swinging axle 11 pivotally supported by the direction changing swinging frame 10, the engagement ball 12 fixed to this swinging axle 11, The front wheel 9 is disposed on the front wheel axle 3 via a locking cylinder 13 that connects each other by locking to the engaging ball 12.

The engagement ball 12 has an engagement pin 12A protruding from its spherical surface so as to be orthogonal to the swing axle 11, and an engagement cylinder 13 is fitted into the engagement ball 12. At the end of the engagement tube 13 that engages the engagement ball 12,
An engagement notch 13A into which the engagement pin 12A is inserted is formed along the cylindrical direction on the circumferential surface.

The direction conversion swing frame 10 includes a shaft support 10A that pivotally supports a swing axle 11, a swing frame main body 10B in which the engaging ball 12 is disposed as a hollow structure and continuous with the shaft support 10A, and a swing frame main body 10B in which the engaging ball 12 is disposed as a hollow structure. A pair of pivot pins 10 are provided protruding from the circumferential surface of the moving frame body 10B in a direction orthogonal to the swinging axle 11 to pivotally support the swinging frame 10 to the vehicle body A.
C is protruded in parallel with the pivot pin 10C and engages with the swing plate 14 of a direction changing mechanism (not shown) to swing the swing frame 10 in the left-right direction about the pivot pin 10C. It consists of a swinging pin 10D that moves.

A pivot pin hole 15 into which the pivot pin C rotatably fits is formed in the base plate of the vehicle body A, and the swing pin 10D is formed parallel to the pivot pin hole 15. A holding frame 16 is provided in which the pivot pin 10C is rotatably fitted, and pivot pin holes 15 are formed at both ends, and the other pivot pin 10C is fitted into the pivot pin hole 15 of the holding frame 16. Attach the holding frame 16 to the toy car body A by fitting it into the swinging frame 1.
0 is pivotally mounted to the toy vehicle body A.

Furthermore, a rocking plate 14 having rocking pin holes 14A formed at both ends is disposed on each of the rocking pins 10D so as to fit into the rocking pin holes 14A. At the center of the swing plate 14, a known direction change mechanism connected to the receiver is provided, for example, a direction change mechanism that rotates a motor (not shown) in forward and reverse directions to swing the direction change pin 17 at a certain angle. An engagement elongated hole 14B into which the pin 17 is inserted and engaged is formed.

In this way, the front wheel axle 3 and the rear wheel axle 2 disposed on the vehicle body A are connected to a drive mechanism 20 so as to mesh with the driven bevel gears 8 thereof, and drive bevel gears 2 are attached to both ends thereof.
The bevel gears 21 at both ends of the drive rod 22 formed by fixing the drive rod 1 are engaged with each other. The drive rod 22 consists of a shaft formed in the shape of a polygonal column such as a hexagonal column, and a drive gear 23 having a fitting hole of the same shape as the shaft is provided on this shaft so as to be movable in the axial direction.

The drive mechanism 20 includes a motor 24 and a reduction gear train 25 that reduces the speed of the motor 24. The reduction gear train 25 includes a drive gear 26 fixed to the drive shaft of the motor 24, and a drive gear 27 of its own to this drive gear 26.
An intermediate gear 27 that meshes with and rotates the intermediate gear 27, an intermediate output gear 28 that meshes its own driving wheel 28A with a driven wheel 27B of the intermediate gear 27, and a driven gear of the intermediate output gear 28 that is coaxially supported with the intermediate gear 27. car 28B
An intermediate gear 29 that meshes with its own driving wheel 29A.
And this intermediate gear 29 meshes with the driven wheel 29B,
It consists of the intermediate output gear 28 and a final output gear 30 coaxially supported. Then, the drive gear 23 of the drive rod 22 is selectively engaged with the intermediate output gear 28 or the final output gear 30 of the gear train 25 by a swing lever (not shown). Therefore, the reduction ratio can be changed depending on which output gears 28 and 30 mesh with the drive gear 23, and the speed of the traveling toy can be adjusted in two stages.

This invention is constructed as described above, and in a four-wheel drive system for a traveling toy, a differential gear train 1 is disposed on each of the rear wheel axle 2 and the front wheel axle 3, so that the inner and outer wheels are As the rotational resistance of the inner ring increases due to the difference in turning radius from the inner ring, the outer ring rotates with an increase corresponding to the reduced rotation of the inner ring, making it possible to turn smoothly. Moreover, compared to conventional running toys in which the inner and outer rings rotate at the same speed,
It is capable of turning with a small turning radius.

The differential gear train 1 includes an axle-fixing bevel gear 4 fixed to the axles 2 and 3 and an axle rotating bevel gear 5 rotatable to the axles 2 and 3, arranged so that their tooth surfaces face each other. Between these bevel gears 4 and 5, a holding plate 7 which pivotally supports an intermediate bevel gear 6 that meshes with these bevel gears 4 and 5 is arranged so as to be rotatable with respect to the axles 2 and 3. Since the driven bevel gear 8 having a housing notch 8A for the axle fixed bevel gear 4 formed therein so as to cover the axle fixed bevel gear 4 is disposed on the side of the axle fixed bevel gear 4 of No. 7, the structure is simple. A compact differential gear train 1 can be provided.

Further, a wheel 9 is fixed to the shaft end of the rear wheel axle 2 where the axle fixed bevel gear 4 is disposed, and a wheel 9 is unrotatably connected to the axle rotating bevel gear 5 at the opposite shaft end. is rotatably arranged with respect to the axle 2, and on the other hand,
A rocking axle 11 is pivotally supported on a rocking frame 10 which is pivotally connected to the toy main body A, and a wheel 9 is fixed to the outer end of the rocking axle 11, and a rocker is attached to the inner end of the rocking axle 11. An engaging ball 12 with an engaging pin 12A protruding from a spherical surface in a direction perpendicular to the moving axle is fixed, and the engaging ball 12 has a locking notch 13A that engages with the engaging pin 12A of the engaging ball 12. An engagement tube 13 is provided which fits externally into the axle, one side of the engagement tube 13 is fixed to the end of the axle fixed bevel gear 4 of the front wheel axle 3, and the other side of the engagement tube 13 is attached to the axle rotating bevel gear. 5, and the engagement cylinder 13 is rotatably connected to the axle 3.
The driven bevel gears 8 of the rear wheel axle 2 and the front wheel axle 3 are disposed at the shaft ends, and are connected to a drive mechanism 20 and have drive bevel gears 21 fixed to both ends of the drive rod 22. Since they mesh, it is possible to provide a four-wheel drive traveling toy with a simple configuration. In particular, a swinging axle 11 is pivotally supported on a swinging frame 10 that is pivotally connected to the toy car body A, and a wheel 9 is fixed to the outer end of the swinging axle 11, and the inner end thereof is fixed. An engagement pin 12 is provided on a spherical surface in a direction perpendicular to the swing axle 11.
The engaging ball 12 formed with A is fixed, and this engaging ball 1
An engagement tube 13 is provided which has a locking notch 13A that engages with the second engagement pin 12A and fits onto the engagement ball 12,
One side of the engagement tube 13 is fixed to the end of the axle fixing bevel gear 4 of the front wheel axle 3, and the engagement tube 13
Since the other end of the engagement cylinder 13 is rotatably connected to the axle rotating bevel gear 5 and the engaging tube 13 is rotatably disposed at the end of the axle 3, it can be used as a direction changing wheel for the front wheel 9. Drive can be applied to the front wheels 9 without interfering with the operation. Moreover, since the drive is provided through the differential gear train 1, as mentioned above, the outer ring rotates by an amount corresponding to the reduced rotation of the inner ring, and turns smoothly and with a small turning radius. is possible.

As explained above, according to this invention, it is possible to provide a four-wheel drive traveling toy that is simple and compact in structure and can have a small turning radius, and is a practically useful invention.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
The figure is a partially cutaway plan view, Figure 2 is a partially cutaway front view,
FIG. 3 is a partially cutaway plan view, and FIG. 4 is an exploded perspective view of the front wheel drive portion. A... Toy main body, 1... Differential gear train, 2... Rear wheel axle, 3... Front wheel axle, 4... Axle fixed bevel gear, 5... Axle rotating bevel gear, 5A... Fitting shaft Department,
6... Intermediate bevel gear, 7... Holding plate, 8... Driven bevel gear, 8A... Storage notch, 9... Wheel, 9A...
Fitting hole, 10... Direction conversion rocking frame, 10A... Axial support, 10B... Rocking frame body, 10C... Pivoting pin, 10D... Rocking pin, 11... Rocking axle, 1
2... Engagement ball, 12A... Engagement pin, 13... Engagement tube, 13A... Locking notch, 14... Rocking plate, 1
4A... Swing pin hole, 14B... Engagement elongated hole, 15
... Pivot pin hole, 16 ... Holding frame, 17 ... Direction conversion pin, 20 ... Drive mechanism, 21 ... Drive bevel gear, 22 ... Drive rod, 23 ... Drive gear, 24 ...
...Motor, 25...Reduction gear train, 26...Drive gear, 27...Intermediate gear, 27A...Motive wheel, 27
B... Driven wheel, 28... Intermediate output gear, 28A...
...Driving wheel, 29...Intermediate gear, 29A...Driving wheel, 29B...Driven wheel, 30...Final output gear,
31...Fixed ring.

Claims (1)

[Scope of utility model registration request] In a four-wheel drive system for a traveling toy, a differential gear train is arranged on each of the rear axle and the front axle, and these differential gear trains consist of an axle-fixed bevel gear fixed to the axle and a rotatable bevel gear fixed to the axle. The axle rotating bevel gears are arranged on the axle so that their tooth surfaces face each other, and between these bevel gears is a holding plate which pivotally supports an intermediate bevel gear meshing with these bevel gears. A driven bevel gear is disposed on the side of the holding plate next to the axle-fixed bevel gear to cover the axle-fixed bevel gear. A wheel is fixed to one shaft end of the rear wheel axle on which the axle fixed bevel gear is disposed, and a wheel is fixedly connected to the axle rotating bevel gear at the opposite shaft end and is rotatable with respect to the axle. On the other hand, a swing axle is pivotally supported on a swing frame which is swingably pivoted to the frame, and a wheel is fixed to the outer end of the swing axle, and a wheel is fixed to the inner end of the swing axle. An engagement ball having an engagement pin formed on a spherical surface is fixed to the part in a direction perpendicular to the swing axle, and the engagement ball has an engagement notch that engages with the engagement pin of the engagement ball and is externally fitted onto the engagement ball. An engaging tube is provided, one side of the engaging tube is fixed to the end of the axle fixed bevel gear of the front wheel axle, and the other side of the engaging tube is unrotatably connected to the axle rotating bevel gear. The engagement tube is rotatably disposed at the end of the axle shaft with respect to the axle, and the driven bevel gears of the rear wheel axle and the front wheel axle are connected to a drive mechanism and drive bevel gears are fixed to both ends of the drive mechanism. A four-wheel drive device for a traveling toy characterized by meshing bevel gears at both ends of a rod.