JPS6320150B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a traveling device for a toy car that is operated by radio control or the like, and more particularly relates to the traveling device that performs the same function as a differential gear device. .

(Prior Art) Recently, toys have become more sophisticated, and, for example, radio-controlled cars are also being equipped with differential gear mechanisms.

However, in the conventionally known differential gear mechanism for radio-controlled automobiles, the actual situation is that the differential gear mechanism mounted on the actual vehicle is miniaturized and installed as is.

(Problems to be Solved by the Invention) However, if a differential gear mechanism such as the one described above is adopted, not only the manufacturing cost increases considerably, but also the frictional resistance becomes large due to problems with the machining accuracy of the gears. This has led to a decline in the performance of automobiles. Therefore, conventional differential gear mechanisms cannot necessarily be expected to produce only good results.

Furthermore, in the case of a differential device for a toy car, it is desirable to be able to adjust the level of the differential device depending on the driving location or driving condition, such as off-road driving.

For example, when driving on a rough road surface, it is more convenient to drive if the differential gear does not work. This is because on a rough road surface, only one of the wheels is often in contact with the ground, and in such cases, if the differential gear is too strong, it may become virtually impossible to drive the vehicle.

However, conventionally known differential devices do not have such a design. For this reason, off-road radio-controlled vehicles were generally not equipped with a differential gear.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the drawbacks of the conventionally known differential devices, and to provide a differential device that is extremely simple in structure and has the same performance as the conventional differential device at a low cost.

Another object of the present invention is to provide the above-mentioned traveling device which has a simple structure and can adjust the level of the differential gear with a simple operation.

(Means for Solving the Problems) The feature of the present invention is that the rotation of a drive source such as a motor is transmitted to the wheel hub via contact plates that sandwich the ball from both sides, and the rotation of this ball is The purpose is to achieve the same effect as a differential gear mechanism by transmitting the rotational difference between one wheel hub to the other wheel hub through motion.

(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In the figure, 1 is an axle, a first wheel hub 2 is fixed to one end of the axle 1, and a second wheel hub 3 is loosely fitted to the other end.

A spacer 4 is provided in contact with the first wheel hub 2, and the spacer 4 is attached to the axle 1 by a set screw 5.
is fixed.

The axle 1 is provided with a stepped portion 6 whose diameter is reduced, and an inner hub 7 is provided integrally with or fixed to the axle 1 in contact with the stepped portion 6.
A spur gear 9 is loosely fitted onto the boss portion 8 of the holder.
A hole is provided through the spur gear 9 in the axial direction, and a ball 10 is inserted into the hole.
Note that it is also possible to provide other rolling elements such as elliptical rollers instead of the balls 10. Each ball 10 is rotatable and slightly protrudes from the inner surface of the spur gear 9 on both sides.

Contact plates 11 and 12 are provided on both sides of the spur gear 9 with a ball 10 in between. One contact plate 11 is fixed to the inner hub 7, and the other contact plate 12 is fixed to the wheel hub spacer 13. Note that the contact plate 11 and the contact plate 12 are not necessarily the same as the inner hub 7 and the wheel hub spacer 13.
The contact plate 11 does not need to be fixed to the inner hub 7 and the spur gear 9, and the contact plate 12 may be sandwiched between the inner hub 7 and the spur gear 9.
3 and spur gear 9 may be used. This is because the ball 10 and the contact plate 11,1
2 is greater than the contact resistance of the contact plate 11 sandwiched between the inner hub 7 and the spur gear 9, or the contact resistance of the contact plate 12 sandwiched between the wheel hub spacer 13 and the spur gear 9, the desired effect will be achieved. This is because it plays. The wheel hub spacer 13 is loosely fitted to the axle 1, and its side surface contacts the second wheel hub 3, which is also loosely fitted to the axle 1, and rotates together.

A contact plate 14 is provided on the outside of the second wheel hub 3,
15, the thrust ball bearing 16 is loosely fitted, and the thrust ball bearing 16 is attached to the contact plate 1
4 and 15. The contact plate 14 is fixed or in frictional contact with the wheel hub 3, and the contact plate 15 is fixed or in frictional contact with the spring washer 17. Spring washers 17 are
It can be changed to other elastic bodies. The contact plates 14, 15 and the thrust ball bearing 16 are pinched together by a contact pressure adjusting nut 18 via a spring washer 17. Balls 19 of the thrust ball bearing 15 slightly protrude outward from both sides, and the balls 19 are in frictional contact with the contact plates 14 and 15. A threaded groove 20 is cut at the end of the axle 1, and a contact pressure adjusting nut 18 is screwed into the threaded groove 20.

Teeth 21 are cut on the outer periphery of the spur gear 9, which meshes with a pinion gear (not shown) and is rotationally driven by an engine or motor.

In the traveling device as described above, the contact pressure adjusting nut 18 is tightened to connect the ball 19 and the contact plates 14,1.
5 and the contact pressure between the ball 10 and the contact plate 1.
By adjusting the contact pressure between the balls 1 and 12, the rotational resistance of the balls 19 and 10 can be adjusted to a predetermined value.

Then, due to the difference in the running resistance torque acting on the first wheel hub 2 and the second wheel hub 3, the distribution of the rotational torque transmitted from the spur gear 9 to the axle 1 and the second wheel hub 3 is different. It is possible to obtain driving conditions such as:

(a) When the running resistance torque applied to the first wheel hub 2 and the second wheel hub 3 is the same, there is no misalignment between the contact plates 11 and 12, so the rotation by the spur gear 9 is wheel hub 2 (i.e. axle 1) and a second wheel hub 3
evenly distributed to Therefore, in this state, the left and right wheels rotate at the same rate.

(b) When the running resistance torque applied to the first wheel hub 2 is larger than the running resistance torque applied to the second wheel hub 3, a misalignment occurs between the contact plate 11 and the contact plate 12. Then, the ball 10 provided on the spur gear 9 contacts the contact plate 11,
12, the displacement of one contact plate 11 is transmitted as reverse rotation of the other contact plate 12, and a part of the rotation on the axle shaft 1 side is returned to the second wheel hub 3 side. That is, the ball 10 and the contact plates 11 and 12 perform the same function as a differential gear mechanism. This action is caused by the two contact plates 1
This occurs because the ball 10 rotates between the contact plates 11 and 12, creating a relative rotation difference between the respective contact plates 11 and 12. Therefore, the rotation speed of the second wheel hub 3 is higher than that of the first wheel hub 2. In this case, since the rotational speeds of the first wheel hub 2 (i.e. axle 1) and the second wheel hub 3 are different, the rotational difference must be absorbed, but this rotational difference can be absorbed by the thrust ball bearing 16. is absorbed by the two contact plates 14 and 15 sandwiching it. This absorption effect is the same as the distribution effect described above.

This provides the same effect as a differential gear mechanism.

(c) If the running resistance torque applied to the first wheel hub 2 is smaller than the running resistance torque applied to the second wheel hub 3, the ball 10 rotates in the opposite direction as in (b) above, as in (b) above. to rotate the first wheel hub 2 more.

(d) The contact pressure between the ball 10 provided on the spur gear 9 and the washers 11 and 12 and the contact pressure between the ball 19 provided on the thrust ball bearing 16 and the contact plates 14 and 15 are adjusted by contact pressure adjustment nuts 18, respectively. It can be adjusted accordingly. Therefore, if the contact pressure is increased, each ball 10, 1
9 and respective contact plates 11, 12 and contact plate 1
4 and 15 becomes large, making it difficult for the balls 10 and 19 to rotate, respectively.

Therefore, the rotation of the spur gear 9 becomes difficult to distribute. Therefore, by changing the contact pressure,
It is possible to change the force of the differential device, that is, the amount of running resistance torque at which the differential mechanism starts working.

Note that the present invention is not limited to the above embodiments, but includes all devices that obtain a differential mechanism using two balls that rotate in contact with the axle side and the second wheel hub side, respectively. It is easily understood from the overall gist that it includes all the scope of design changes by those skilled in the art.

(Effects of the Invention) As described above, the traveling device of the present invention can realize the same function as a differential gear mechanism without using a complicated mechanism such as a bevel gear mechanism. For example, an inexpensive traveling device for a traveling toy is provided.

In addition, since the level of differential gear can be adjusted simply by rotating the contact pressure adjusting nut, the operation is simple.

[Brief explanation of the drawing]

The accompanying drawing is a longitudinal cross-sectional view of a main part of the traveling device for a traveling toy according to the present invention. 1: Axle, 2: First wheel hub, 3: Second
wheel hub, 9: spur gear, 10: ball, 11: contact plate, 12: contact plate, 14: contact plate, 15: contact plate, 16: thrust ball bearing, 17: spring washer, 18: contact pressure adjustment nut , 19: Ball.

Claims (1)

[Claims] 1. Axle 1 rotatably supported by a frame, etc.
a first wheel hub 2 fixed to one end of the axle 1; a second wheel hub 3 loosely fitted to the other end of the axle 1; and a second wheel hub 3 adjacent to the second wheel hub 3. Axle 1
A driving gear 9 loosely fitted into the driving gear 9, a rolling element 10 rotatably provided on the driving gear 9, the rolling element 10 being sandwiched from both sides and rolling into contact with each other, one of which is fixed to the axle 1 side. The other is made up of two contact plates 11 and 12 fixed to the second wheel hub 3 side, and is configured to handle the running resistance torque acting on the axle 1 side and the running resistance torque acting on the second wheel hub 3 side. a mechanism that distributes the rotation acting on the drive gear 9 between the axle 1 and the second wheel hub 3 in response to the rotation, and a contact plate 15 fixed to the axle 1 side and a contact plate 15 fixed to the second wheel hub 3 side. It consists of a plate 14 and a sliding contact body 16 provided between the two contact plates 14 and 15, which absorbs the rotational difference between the axle 1 and the second wheel hub 3 caused by the distributing mechanism. A traveling device for a traveling toy, comprising: an absorbing mechanism; the distributing mechanism and the absorbing mechanism cooperate to perform a differential function. 2 Axle 1 rotatably supported by a frame, etc.
a first wheel hub 2 fixed to one end of the axle 1; a second wheel hub 3 loosely fitted to the other end of the axle 1; and a second wheel hub 3 adjacent to the second wheel hub 3. Axle 1
A driving gear 9 loosely fitted into the driving gear 9, a rolling element 10 rotatably provided on the driving gear 9, the rolling element 10 being sandwiched from both sides and rolling into contact with each other, one of which is fixed to the axle 1 side. The other is made up of two contact plates 11 and 12 fixed to the second wheel hub 3 side, and is configured to handle the running resistance torque acting on the axle 1 side and the running resistance torque acting on the second wheel hub 3 side. a mechanism that distributes the rotation acting on the drive gear 9 between the axle 1 and the second wheel hub 3 in response to the rotation, and a contact plate 15 held on the axle 1 side and a contact plate 15 held on the second wheel hub 3 side. It consists of a plate 14 and a sliding contact body 16 provided between the surface contact plates 14 and 15, and is configured to absorb the rotational difference between the axle 1 and the second wheel hub 3 caused by the distributing mechanism. an absorbing mechanism; a contact pressure adjusting nut 18 provided at the end of the axle 1 so as to be displaceable in the axial direction; and an elastic body 17 provided between the contact pressure adjusting nut 18 and the contact plate 15.
A traveling device for a traveling toy, characterized in that the contact pressure in the absorbing mechanism is adjustable, and the distributing mechanism and the absorbing mechanism cooperate to perform a differential function.