JP2012179931A - Vehicle propulsion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle propulsion device that can obtain an enough propulsive force in not only running in a pavement road but also on the snow and the marsh, etc.SOLUTION: The vehicle propulsion device includes: a screw shape rotating body 11 that rotates around a first rotary shaft 11a that is formed in spiral centering on the first rotary shaft 11a extending to a propulsive direction of a vehicle 1; and a number of rolling elements 12 arranged in spiral along a peripheral end face of a screw part 11b of a rotating body 11, and provided to roll centering on a second rotary shaft that makes a prescribed inclination angle to an axial direction of the rotating body 11. When running a pavement road, the propulsive force of the rotating body 11 to the axial direction is obtained by rolling of each rolling element 12 to a tangential direction of the screw part 11b by grounding to the road surface, while rolling of the rotating body 11 to the rotating direction being regulated. Moreover, when running in the road on the snow and the marsh, etc. the propulsive force is obtained by the force of the screw part 11b of each rotating body 11 extruding the snow and mud backward.

Description

  The present invention relates to a vehicle propulsion device used for various vehicles such as passenger cars, freight cars, agricultural cars, special cars, construction cars, and the like.

  In general, tires are used in vehicles that run on road surfaces such as passenger cars, but the frictional force with wet road surfaces decreases with ordinary tires, so there is a disadvantage that hydroplaning is likely to occur at high speeds in rainy weather. is there. Moreover, in a construction vehicle that travels on a soft road surface made of soil or mud, such as a construction site, it is difficult to travel with normal tires, and it may become difficult to escape due to being muddy. On the other hand, studless tires are used on snowy roads, but even on studless tires, braking and driving performance is not sufficient on snowy roads compared to dry road surfaces, and slipping and lateral flow may occur.

  On the other hand, as a propulsion device suitable for traveling on snow or in a wetland, a device that obtains a propulsive force with a screw-like rotating body is known (for example, see Patent Document 1).

JP-A-8-169388

  As described above, the one using a screw-like rotating body pushes snow and mud backward, so it will not slip like a tire, and it will surely get propulsion on the snow or in wetlands. be able to. However, since such a screw-like rotating body cannot be used on the asphalt road surface of a paved road, it is limited to running on snow or in a wetland, and cannot be used for a vehicle assumed to run on a paved road. There was a problem.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to provide a vehicle propulsion device capable of obtaining sufficient propulsive force not only on a paved road but also on snow or in a wetland. Is to provide.

  In order to achieve the above object, the present invention is formed in a spiral shape around a first rotation axis extending in the propulsion direction of the vehicle and rotates around a first rotation axis, A large number of rolling elements arranged so as to roll around a second rotating shaft which is arranged in a spiral shape along the peripheral end surface of the screw portion of the body and forms a predetermined inclination angle with respect to the axial direction of the rotating body The rotating body is propelled in the axial direction of the rotating body by rotating the rotating body while grounding the rolling element on the road surface.

  Thereby, when driving | running | working on a paved road, if each rotary body is rotated, each rolling element of a screw part will roll, grounding to a road surface sequentially. At that time, each rolling element rolls about a second rotation axis that forms a predetermined inclination angle with respect to the axial direction of the rotating body, so that each rolling element regulates rolling in the rotating direction of the rotating body. While propelled by rolling against the road surface, a propulsive force in the axial direction of the rotating body can be obtained. Further, when traveling on a snowy road, a wetland, or the like, when each rotating body is rotated, a propulsive force is obtained by the force with which the screw portion of each rotating body pushes snow or mud backward.

  According to the present invention, sufficient propulsive force can be obtained not only on a paved road but also on snow and wetlands. For example, when heading to a ski resort by car or a resident in a heavy snow region For passenger cars that run on paved roads and snowy roads, such as when they are owned, there is an advantage that there is no need to change from normal tires to studless tires as with normal tires. In addition, construction vehicles that run on paved roads and soft road surfaces of construction sites have the advantage that they do not slip on soft road surfaces and cannot escape due to mud.

The top view of the vehicle propulsion apparatus which shows the 1st Embodiment of this invention Side view of vehicle propulsion device Rear view of the vehicle propulsion device Side view of rotating body Top view of the main part of the rotating body Side view of main part of rotating body The principal part top view of the rotating body which shows the positional relationship of a rolling element Top view of the main part of the rotating body showing the principle of propulsion Side view of main part of rotating body showing second embodiment of the present invention The top view of the vehicle propulsion apparatus which shows the 3rd Embodiment of this invention.

  1 to 8 show a first embodiment of the present invention and show a vehicle propulsion device used for a passenger car.

  A vehicle 1 shown in the figure is a passenger car including a vehicle body 2, a pair of left and right front wheels 3, an engine 4 and a transmission 5, and a propulsion device 10 of the present embodiment is provided at the rear part instead of a rear wheel. .

  The propulsion device 10 includes a pair of left and right screw-like rotating bodies 11 disposed on both sides in the width direction of the vehicle 1, and a large number of rolling elements 12 arranged in a spiral manner along the peripheral end surface of the screw portion of the rotating body 11. And a transmission mechanism 13 that rotates each rotating body 11.

  Each rotating body 11 includes a first rotating shaft 11a extending in the propulsion direction of the vehicle 1 and a screw portion 11b formed in a spiral shape centering on the first rotating shaft 11a. The tangential direction A is formed so as to form a predetermined inclination angle θ1 (for example, 60 °) with respect to the axial direction B of the rotating body 11. In addition, a large number of holes 11c are provided in the peripheral end surface of the screw portion 11b to accommodate the rolling elements 12 one by one.

  Each rolling element 12 is formed of spherical rubber, and is accommodated in the hole 11c of the rotating body 11 so that substantially half of the rolling element 12 is located outside. In this case, each rolling element 12 may be a solid sphere made entirely of rubber, or may be a metal or synthetic resin sphere covered with rubber. The rolling element 12 has a second rotating shaft 12a passing through the center thereof, and both ends of the second rotating shaft 12a are rotatably supported by bearings 12b fixed to the screw portion 11b of the rotating body 11. . The second rotating shaft 12a is arranged to form a predetermined inclination angle θ2 (for example, 30 °) with respect to the axial direction B of the rotating body 11, and each rolling element 12 is in the same direction as the tangential direction A of the screw portion 11b. It is designed to roll only on. In this case, as shown in FIG. 7, the rolling elements 12 are arranged at an interval L1 as shown in FIG. 7, and the rolling elements 12 at an arbitrary position P1 in the axial direction of the rotating body 11, and the axial position P1 and the rotating elements 12 Arranged so that the rolling element 12 at the other axial position P2 of the rotating body 11 at the same circumferential position Q of the body 11 is shifted by a predetermined distance L2 (for example, 1/2 of L1) in the circumferential direction of the rotating body 11. Has been.

  The transmission mechanism 13 has a drive shaft 13 b connected to the transmission 5 of the vehicle 1 via a coupling 13 a and is provided at the lower portion of the vehicle body 2. One end of the first rotating shaft 11a of each rotating body 11 is connected to the transmission mechanism 13, and the other end of the first rotating shaft 11a is rotatably supported on the rear end side of the vehicle body 2 by a bearing 13c. . In other words, the transmission mechanism 13 is configured to transmit the power of the engine 4 to the first rotating shaft 11a of each rotating body 11 via the drive shaft 13b and a gear (not shown), and the rotating bodies 11 in the opposite directions to each other. It is designed to rotate.

When the vehicle 1 including the propulsion device 10 configured as described above travels on a paved road, each rolling element of the screw portion 11b is rotated by rotating each rotating body 11 of the propulsion device 10 with the power of the engine 4. 12 rolls while sequentially contacting the road surface, and the vehicle 1 propels in the axial direction B of the rotating body 11. That is, when the rolling element 12 comes into contact with the road surface, the rolling element 12 rolls in the rotation direction C of the rotating body 11 (direction perpendicular to the axial direction B of the rotating body 11) by the frictional force with the road surface as shown in FIG. However, since the rolling element 12 is restricted only in the tangential direction A of the screw part 11b by the second rotating shaft 12a, the rolling element 12 rolls in the A direction. At that time, a force F (propulsive force) that pushes the road surface backward is obtained by the rotation of the rotating body 11 in the B direction by the amount that the rolling element 12 rolls in the A direction due to contact with the road surface. Here, if the distance that the rolling element 12 advances in the A direction by contact with the road surface is D1, and the distance that the rotating body 11 advances in the B direction is D2, theoretically,
D2 = D1 × cos θ1 (1)
It becomes. In addition, the rotating body 11 itself tries to roll in the width direction (C direction) of the vehicle 1 due to the frictional force between the rolling element 12 and the road surface, but the rotating body 11 rotates in opposite directions by the transmission mechanism 13. The force of rolling of each rotating body 11 in the C direction is canceled out. Further, each rolling element 12 contacts the road surface once every time the rotating body 11 rotates, but the rolling element 12 at an arbitrary position P1 in the axial direction of the rotating body 11 and the axial position P1 rotate. Since the rolling element 12 at the other axial position P2 of the rotating body 11 at the same circumferential position Q of the body 11 is shifted by the distance L2, the following is performed after any rolling element 12 is grounded at the axial position P1. Until another rolling element 12 is grounded, another rolling element 12 is grounded at another axial position P2.

  Further, when traveling on a snowy road, a propulsive force is obtained by the force with which the screw portion 11b of each rotating body 11 pushes snow backward. The same applies to traveling on soft road surfaces such as wetlands and muddy roads.

  Thus, according to the propulsion device 10 of the present embodiment, the screw that is formed in a spiral shape centering on the first rotation shaft 11a extending in the propulsion direction of the vehicle 1 and rotates about the first rotation shaft 11a. And a second rotating shaft 12a which is arranged in a spiral shape along the peripheral end surface of the screw portion 11b of the rotating body 11 and forms a predetermined inclination angle θ2 with respect to the axial direction B of the rotating body 11. A large number of rolling elements 12 provided to roll to the center, and when traveling on a paved road, each rolling element 12 is restricted from rolling with respect to the road surface while being restricted from rolling in the rotational direction C of the rotating body 11. By rolling in the tangential direction A of the screw part 11b by grounding, a propulsive force in the axial direction B of the rotating body 11 can be obtained. Further, when traveling on a snowy road, a wetland, or the like, a propulsive force can be obtained by a force by which the screw portion 11b of each rotating body 11 pushes snow or mud backward.

  This makes it possible to travel not only on paved roads but also on snow and wetlands. For example, when heading to a ski resort by car or when a resident in a heavy snow area owns a car, paved roads and snowy roads can be used. In a passenger car or the like traveling on the road, there is an advantage that there is no need to replace a normal tire with a studless tire unlike a normal tire. In addition, construction vehicles that run on paved roads and soft road surfaces of construction sites have the advantage that they do not slip on soft road surfaces and cannot escape due to mud.

  Further, in a normal tire, since the contact surface is continuous in the tire circumferential direction, a water film is generated between the tire and the road surface during high-speed running in rainy weather, which causes a hydroplaning phenomenon. In this case, since a large number of rolling elements 12 are instantaneously brought into contact with the road surface once for each rotation of the rotating body 11, the ground contact surface becomes discontinuous, which is extremely advantageous for preventing the hydroplaning phenomenon.

  In the present embodiment, a pair of rotating bodies 11 having the screw portions 11b opposite to each other are provided in the width direction of the vehicle 1, and the rotating bodies 11 are rotated in the opposite directions. Can cancel the force of rolling in the width direction of the vehicle 1 and can improve the straight running stability.

  Furthermore, each rolling element 12 is located at the rolling element 12 at an arbitrary position P1 in the axial direction of the rotating body 11 and at another axial position P2 of the rotating body 11 at the same position Q in the circumferential direction of the position P1 and the rotating body 11. Since the rolling element 12 and the rolling element 12 are arranged so as to be shifted from each other by a predetermined distance L2 in the circumferential direction of the rotating element 11, after the arbitrary rolling element 12 is grounded at the axial position P1, the next rolling element 12 is moved to the axial position P1. Another rolling element 12 can be grounded at another axial position P2 until it is grounded, and the interval between any rolling element 12 and the next rolling element 12 is shortened. be able to. Thereby, the vibration and noise which arise by the earthing | grounding of each rolling element 12 can be reduced, and the improvement of riding comfort can be aimed at.

  Moreover, since each rolling element 12 was formed in a spherical shape, the rolling resistance of the rolling element 12 can be reduced, and smooth running becomes possible.

  In the above embodiment, each rolling element 12 is formed in a spherical shape. However, as shown in the second embodiment in FIG. 9, a large number of roller-like rolling elements 14 may be used.

  The rolling element 14 shown in the figure is formed of roller-like rubber, and is accommodated in the hole 11d of the rotating body 11 so that approximately half of the outer peripheral surface is located outside. In this case, each rolling element 14 may be a solid roller made entirely of rubber, or may be a roller made of metal or synthetic resin and covered with rubber. The rolling element 14 has a second rotating shaft 14 a passing through the center thereof, and both ends of the second rotating shaft 14 a are rotatably supported by bearings 14 b fixed to the screw portion 11 b of the rotating body 11. . The second rotating shaft 14a is arranged to form a predetermined inclination angle θ2 (for example, 30 °) with respect to the axial direction B of the rotating body 11, and each rolling element 12 is in the same direction as the tangential direction A of the screw portion 11b. It is designed to roll only on. Other configurations are the same as those of the first embodiment.

  Thus, as in the first embodiment, each rolling element 14 is rotated in the tangential direction A of the screw portion 11b by the road surface and the ground while being restricted from rolling in the rotating direction of the rotating body 11. A propulsive force in the axial direction B of the body 11 can be obtained. Moreover, since the roller-shaped rolling element 14 can be made smaller in outer diameter than a spherical one, the interval between the rolling elements 14 can be reduced. Thereby, since the number of the rolling elements 14 can be increased, it is extremely advantageous for reducing vibration and noise caused by the grounding of each rolling element 14.

  In each of the above-described embodiments, the vehicle 1 can be turned smoothly if the drive unit 13 is provided with a differential gear that allows the rotational difference of each rotating body 11.

  Moreover, in the said embodiment, although the thing provided with the pair of rotary body 11 of the width direction of the vehicle 1 was shown, as shown to the 3rd Embodiment of FIG. 11 may be provided. In this case, the vehicle 1 is provided with a pair of left and right rear wheels 6 disposed on both sides of the rotating body 11 in the width direction, and the rear wheels 6 and the rolling elements 12 of the rotating body 11 are grounded. . Thereby, since rolling of the rotating body 11 itself in the width direction of the vehicle 1 can be restricted by each rear wheel 6, straight running stability can be improved. In the present embodiment, as in the second embodiment, a roller-like rolling element 14 can be used.

  In each of the above-described embodiments, the second rotating shafts 12a and 14a of the rolling elements 12 and 14 have a predetermined inclination with respect to the axial direction B of the rotating body 11 so as to roll in the tangential direction A of the screw portion 11b. Although the one arranged at the angle θ2 (θ2 = 90 ° −θ1) is shown, the rolling direction of the rolling elements 12 and 14 does not necessarily coincide with the tangential direction A of the screw portion 11b, and the inclination angle θ2 Can be set to be different from 90 ° -θ1.

  In each of the above embodiments, if a brake for braking the rotating body 11 is provided, the vehicle 1 can be stopped more reliably.

  In each of the above embodiments, the propulsion device of the present invention is used for a passenger car. However, the propulsion device of the present invention is not limited to a passenger car, but can be a variety of vehicles such as freight vehicles, agricultural vehicles, special vehicles, and construction vehicles. It can be used for other vehicles.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 10 ... Propulsion apparatus, 11 ... Rotating body, 11a ... 1st rotating shaft, 11b ... Screw part, 12, 14 ... Rolling body.

Claims (5)

A screw-like rotating body that is formed in a spiral shape around a first rotation axis extending in the propulsion direction of the vehicle and rotates around the first rotation axis;
A number of rolling elements are provided so as to roll around a second rotating shaft that is arranged in a spiral shape along the peripheral end surface of the screw portion of the rotating body and forms a predetermined inclination angle with respect to the axial direction of the rotating body. With moving objects,
A vehicular propulsion device configured to propel in the axial direction of a rotating body by rotating the rotating body while grounding the rolling element on a road surface. A pair of rotating bodies with the screw portions opposite to each other are provided in the width direction of the vehicle,
The vehicle propulsion device according to claim 1, wherein the rotating bodies are provided so as to rotate in directions opposite to each other. Each of the rolling elements includes a rolling element at an arbitrary position in the axial direction of the rotating body and a rolling element at another axial position of the rotating body at the same position in the circumferential direction of the rotating body. The vehicle propulsion device according to claim 1, wherein the vehicle propulsion device is arranged so as to be shifted by a predetermined distance in the direction. The vehicle propulsion device according to claim 1, 2, or 3, wherein each of the rolling elements is formed in a spherical shape. The vehicle propulsion device according to claim 1, 2, or 3, wherein each of the rolling elements is formed in a roller shape.

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