JP2011084131A - Movable auxiliary wheel mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable auxiliary wheel mechanism capable of changing a grounding position of an auxiliary wheel. <P>SOLUTION: This movable auxiliary wheel mechanism 1 includes a slide body sliding in the vertical direction, each of swing rods 3, 3 rotatably supported at a fulcrum and having one end connected with the slide body and the other end swingable in the vertical direction with the fulcrum as a center, and each of legs 4, 4 having a base end located between the fulcrum of each swing rod 3 and the other end, rotatably mounted around an axis of each swing rod 3 and mounted with the auxiliary wheel 5 at a distal end. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a movable auxiliary wheel mechanism capable of preventing a vehicle from overturning or overturning and realizing stable traveling of the vehicle.

  Single track vehicles are used at construction sites and agricultural sites to carry luggage. Single track vehicles have the merit of being able to make a small turn, but have the disadvantage that they may roll over or fall.

  In order to prevent such a rollover or overturn, a transport vehicle that attaches auxiliary wheels in addition to a single-track main wheel and contacts the ground at multiple points is disclosed in Patent Document 1, and in addition to a single-track endless track. Patent Document 2 discloses a transport vehicle in which auxiliary wheels are attached and grounded at a plurality of points.

JP-A-2005-96488 ACT 7-43399

  However, the above-described vehicle cannot change the grounding position of the auxiliary wheel to the traveling direction of the vehicle, the width direction of the vehicle, or the height direction of the vehicle with respect to the grounding position of the main wheel or the crawler. Therefore, for example, when traveling on a road where both sides are sharp, there is a problem that the road where the vehicle can not travel through is restricted because the ground contact position of the auxiliary wheel is too wide, and the road on which the vehicle can travel is limited.

  Furthermore, depending on conditions such as the grounding position of the auxiliary wheel, the grounding position of the main wheel or crawler in the vehicle, and the inclination of the road surface, the vehicle may roll over or fall over.

  In view of the above, an object of the present invention is to provide a movable auxiliary wheel mechanism that can change the ground contact position of the auxiliary wheel.

  In order to solve the above-mentioned problem, the movable auxiliary wheel mechanism according to claim 1 is supported by a slide body that slides up and down, and is pivotally supported by a fulcrum, the slide body is connected to one end, and the other is centered on the fulcrum A swing rod whose end is swingable up and down, and a base end is between the fulcrum and the other end of the swing rod, and is attached rotatably about the axis of the swing rod, The tip is provided with a leg to which an auxiliary wheel is attached.

  According to the movable auxiliary wheel mechanism of the first aspect, the swing rod swings due to the sliding of the slide body, and the legs rotate around the axis of the swing rod, so that the grounding position of the auxiliary wheel is set in the vehicle traveling direction, It can be changed in the width direction of the vehicle and the height direction of the vehicle.

  A movable auxiliary wheel mechanism according to a second aspect is the movable auxiliary wheel mechanism according to the first aspect, wherein the slide body is attached to the main body and an end portion of the main body and can swing up and down with respect to the main body. The swing rod has a connection hole drilled in the axial direction at the one end, and a part of the connection part is loosely fitted in the connection hole.

  According to the movable auxiliary wheel mechanism of the second aspect, the slide body is operated in the same manner as the movable auxiliary wheel mechanism of the first aspect, and the slide body is coupled to the swing rod with the simple structure as described above, and the slide body slides. The motion can be easily converted into a swing motion of a swing rod.

  A movable auxiliary wheel mechanism according to a third aspect is the movable auxiliary wheel mechanism according to the first or second aspect, wherein a guide hole through which a guide rod for guiding the slide body passes is formed in the slide body.

  According to the movable auxiliary wheel mechanism of the third aspect, the slide auxiliary member operates in the same way as the movable auxiliary wheel mechanism of the first or second aspect, and the slide body has a guide hole through which a guide rod for guiding the slide body passes. By being formed, the slide body stably slides up and down, and consequently the swing of the swing rod is stabilized.

  According to a fourth aspect of the present invention, there is provided the movable auxiliary wheel mechanism, wherein the support portion is rotatably supported, the shaft has an end portion that is an axis that forms a predetermined angle with respect to the axis of the support portion, and the base end is the base end. A shaft is attached so as to be rotatable around the axis of the end of the shaft, and a leg to which an auxiliary wheel is attached is provided at the tip.

  According to the movable auxiliary wheel mechanism of the fourth aspect, the end portion of the shaft is displaced by the rotation of the shaft, and the leg is rotated around the axis of the end portion of the shaft, whereby the grounding position of the auxiliary wheel is set. It can be changed in the vehicle traveling direction, the vehicle width direction, and the vehicle height direction.

  In the movable auxiliary wheel mechanism according to a fifth aspect, in the movable auxiliary wheel mechanism according to the fourth aspect, an angle formed by the axis of the end with respect to the axis of the support is variable.

  According to the movable auxiliary wheel mechanism of claim 5, the same action as that of the movable auxiliary wheel mechanism of claim 4 is performed, and the angle formed by the axis of the end with respect to the axis of the support is variable. As a result, the degree of freedom of changing the contact position of the auxiliary wheel is further increased.

  A movable auxiliary wheel mechanism according to a sixth aspect of the present invention is the movable auxiliary wheel mechanism according to any one of the first to fifth aspects, wherein the tip of the leg to which the auxiliary wheel is attached is rotatable around the long axis of the leg. It has become.

  According to the movable auxiliary wheel mechanism of claim 6, the distal end of the leg to which the auxiliary wheel is attached operates in the same manner as the movable auxiliary wheel mechanism of any one of claims 1 to 6. By being able to rotate around, the grounding position of the auxiliary wheel can be easily changed.

  According to the invention of any one of claims 1 to 5, by changing the ground contact position of the auxiliary wheel according to the road surface condition, there is an effect that the vehicle can be prevented from overturning or falling and stable running can be realized.

It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 1st embodiment of this invention. It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 1st embodiment of this invention. It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 1st embodiment of this invention. It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 1st embodiment of this invention. It is a front view which shows a movable auxiliary wheel mechanism, and shows a cross section display of a part of casing. It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 2nd embodiment of this invention. It is the front view and side view of a single track vehicle provided with the movable auxiliary wheel mechanism of 2nd embodiment of this invention. It is a front view which shows a movable auxiliary wheel mechanism.

  Hereinafter, a single track vehicle 10 having a movable auxiliary wheel mechanism 1 according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a case where a single track vehicle 10 having a movable auxiliary wheel mechanism 1 travels on a flat road surface. FIG. 2 shows a case where the single track vehicle 10 having the movable auxiliary wheel mechanism 1 travels on a stepped road surface. A wheel 13 to be described later is grounded at a valley of the step, and auxiliary wheels 5 and 5 to be described later are stepped. Grounded on the mountain. FIG. 3 shows a case where the single track vehicle 10 having the movable auxiliary wheel mechanism 1 travels on a stepped road surface, and wheels 13 and auxiliary wheels 5 and 5 described later are grounded at the stepped valleys. FIG. 4 shows a case where the single track vehicle 10 having the movable auxiliary wheel mechanism 1 travels on an inclined road surface.

  As shown in FIGS. 1 to 4, the single track vehicle 10 includes a main body frame 11, a driving device 12 and wheels 13 provided below the main body frame 11.

  The main body frame 11 includes a loading platform portion 11 a for placing a load provided on the front side of the main body frame 11 and a hand-held handle portion 11 b provided on the rear side of the main body frame 11. The operator can hold the handle portion 11b and carry the load placed on the loading platform portion 11a in a state where the loading platform portion 11a is substantially horizontal.

  The movable auxiliary wheel mechanism 1 according to the first embodiment of the present invention is provided at the front end of the loading platform 11a. The movable auxiliary wheel mechanism 1 includes a casing 7, swing rods 3, 3 partially protruding from both ends of the casing 7, and a base end attached to each swing rod 3, and an auxiliary wheel 5 attached to the tip. Leg 4, 4.

  As can be seen by comparing the front views (a) of FIGS. 1 to 4, the swing rods 3 and 3 can swing by changing the direction in which the swing rods 3 and 3 protrude from the casing 7. Further, as can be seen by comparing the side views (b) of FIGS. 1 to 4, the leg 4 is rotatable around the axis of the swing rod 3. Further, the leg 4 has a leg main body 41 and a leg tip portion 42 at the tip of the leg 4 to which the auxiliary wheel 5 is attached, and can be understood by comparing FIG. 1 and FIG. 4 with FIG. 2 and FIG. As described above, the leg tip portion 42 is rotatable around the long axis of the leg 4.

  As shown in FIGS. 1 to 4, the grounding position of the auxiliary wheels 5, 5 is changed according to the respective road surface conditions by swinging the swing rods 3, 3, turning the legs 4, and turning the leg tips 42. Can be done.

  Hereinafter, the internal configuration of the casing 7 of the movable auxiliary wheel mechanism 1 and the swing operation of the swing rods 3 and 3 will be described in detail with reference to FIG.

  As shown in FIG. 5, the movable auxiliary wheel mechanism 1 is rotatably supported on the casing 7 by a casing 7, a slide body 2 that slides up and down inside the casing 7, and a fulcrum pin 31 that serves as a fulcrum. Between the fulcrum pin 31 and the other end of the swing rod 3, the slide body 2 is connected to one end and the other end can swing up and down around the fulcrum pin 31. The leg 4 is attached so as to be rotatable around the axis of the swing rod 3.

  The casing 7 is a cylindrical body having both ends open, and a part of the swing rod 3 protrudes from each opening. Guide rods 71 and 71 for guiding the slide of the slide body 2 are arranged inside the casing 7. A rotating lever 6 that is screwed with the slide body 2 is attached to the casing 7.

  The slide body 2 includes a main body 21 and connecting portions 22 and 22 that are attached to end portions of the main body 21 via connecting pins 23 and that can swing up and down with respect to the main body 21.

  The main body 21 is formed with guide holes 24 and 24 through which the above-described guide rods 71 and 71 pass, respectively, and a screw hole 25 into which the rotating lever 6 is screwed.

  An insertion rod 22a extends from each connecting portion 22 into the connecting hole 32 of the swing rod 3 described later. Thereby, the insertion rod 22a which is a part of the connecting portion 22 is loosely fitted in the connecting hole 32. Each connecting portion 22 is swingable with respect to the main body 21 around the connecting pin 23, but the insertion rod 22 a does not come out of the connecting hole 32 drilled in the axial direction at one end of the swing rod 3. As described above, the swing range of the connecting portion 22 is limited.

  As shown in FIGS. 5A to 5C, when the slide body 2 slides, the insertion rod 22 a of the connecting portion 22 pushes the inner wall of the connecting hole 32 of the swing rod 3. With this pushing force, the other end of the swing rod 3 swings around the fulcrum pin 31.

  Hereinafter, the movable auxiliary wheel mechanism 1 </ b> A according to the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 shows a case where the single track vehicle 10 having the movable auxiliary wheel mechanism 1A travels on a flat road surface. FIG. 7 shows a case where the single track vehicle 10 having the movable auxiliary wheel mechanism 1A travels on a stepped road surface, and wheels 13 and auxiliary wheels 5, 5 described later are grounded at the stepped valleys. In addition, description of the single track vehicle 10 common to 1st embodiment is abbreviate | omitted, and the movable auxiliary wheel mechanism 1A of 2nd embodiment is demonstrated in detail.

  The movable auxiliary wheel mechanism 1 </ b> A includes a support portion 81 that is rotatably supported, a shaft 8 having end portions 82 and 82 that are axes that form a predetermined angle with respect to the axis of the support portion 81, and a base end Is attached so as to be rotatable around the axis of each end portion 82 of the shaft 8, and includes legs 4, 4 to which the auxiliary wheel 5 is attached at the tip.

  The shaft 8 is attached to the front end of the loading platform 11 a of the single track vehicle 10 in a state where the shaft 8 is rotatably supported via the attachment member 9.

  In the movable auxiliary wheel mechanism 1A, by rotating the shaft 8, the end portions 82 and 82 are bent upward as shown in FIG. 6, and the end portions 82 and 82 as shown in FIG. Can be bent downward. The movable auxiliary wheel mechanism 1 </ b> A may have a fixing unit that can fix the rotation of the shaft 8.

  As shown in FIGS. 6 and 7, the grounding position of the auxiliary wheels 5 and 5 is changed according to the respective road surface conditions by the displacement of the end portions 82 and 82 of the shaft 8, the rotation of the leg 4 and the rotation of the leg tip 42. Can be changed.

  FIG. 8 shows the movable auxiliary wheel mechanism 1 </ b> B having the end portions 82 and 82 in which the angle formed by the end portions 82 and 82 with respect to the axis of the support portion 81 is variable. Hereinafter, description of the configuration common to the movable auxiliary wheel mechanism 1A will be omitted.

  At both ends of the support portion 81, center holes through which the center pins 83 pass are formed. A center hole through which the center pin 83 passes is also formed in the end portion 82. By inserting the center pin into both the center holes in a state where the center hole of the support part 81 and the center hole of the end part 82 are overlapped, as shown in FIG. Is pivotally mounted around the center.

  At both ends of the support portion 81, through holes are formed at a predetermined distance from the center hole through which the center pin 83 passes. A plurality of through-holes 85 are also formed in concentric circles centering on the center hole at a predetermined distance from the center hole through which the center pin 83 passes. By inserting the insertion pin 84 into one of the through hole of the support part 81 and one of the through holes 85 of the end part 82 in a state where one of the through hole of the support part 81 and one of the through holes 85 of the end part 82 is superposed, As shown in FIG. 8, the angle between the end portions 82 and 82 and the axis of the support portion 81 can be fixed. By changing one of the through holes 85 of the end portion 82 that overlaps the through hole of the support portion 81 and inserting the insertion pin 84, the end portions 82 and 82 are aligned with the axis of the support portion 81. The angle between is variable.

  In FIG. 8, the end portions 82, 82 show the case where the angles formed by the end portions 82, 82 are the same as the angle of the support portion 81, but the left and right end portions 82, 82 are independent of each other. The angle formed by the axes of the end portions 82 and 82 with respect to the axis of the support portion 81 can be changed.

  In addition, the edge part which the angle which the axis line of the edge parts 82 and 82 makes with respect to the axis line of said support part 81 is variable is an example, and the axis line of an edge part with respect to the axis line of a support part is another structure. An end having a variable angle may be realized.

  In the first and second embodiments, the case where the single-track vehicle 10 has the wheels 13 has been described. However, the present invention is not limited to this, and for example, the single-track vehicle has a crawler traveling device having an endless track. Also good.

  In the first and second embodiments described above, the case where the movable auxiliary wheel mechanism 1 and 1A are attached to the single track vehicle 10 having one wheel has been described. A movable auxiliary wheel mechanism may be attached to a vehicle having a plurality of wheels or a plurality of tracks on which the vehicle tends to lose its balance.

  In the first embodiment, the case where the slide body 2 is configured to slide by rotating the rotation lever that is screwed with the slide body 2 is described, but the present invention is not limited to this. The slide body may be slid by a driving force such as an actuator. Further, the rotation of the leg swing rod around the axis may be performed by a driving force such as a motor or an actuator.

  The rotation of the shaft 8, the rotation of the end 82, and the insertion / removal of the insertion pin 84 in the second embodiment may be performed by a driving force such as a motor or an actuator.

  In the first embodiment, the case where the two swing rods 3 and 3 are simultaneously swung by the slide of one slide body 2 has been described. However, the present invention is not limited to this. The slide rods may be connected to the respective slide bodies, and the two swing rods may be independently swung.

1, 1A, 1B Movable auxiliary wheel mechanism 2 Slide body 3 Swing rod 4 Leg 5 Auxiliary wheel 6 Rotating lever 7 Casing 8 Shaft 9 Mounting member 10 Single track vehicle 11 Main body frame 11a Loading platform 11b Handle portion 12 Driving device 13 Wheel 21 Main body 22 Connecting portion 22a Inserting rod 23 Connecting pin 24 Guide hole 25 Screw hole 31 Supporting pin 32 Connecting hole 41 Leg main body 42 Leg tip portion 71 Guide rod 81 Support portion 82 End portion 83 Center pin 84 Insertion pin 85 Through hole

Claims (6)

A slide body that slides up and down;
A swing rod that is supported rotatably at a fulcrum, the slide body is connected to one end, and the other end can swing up and down around the fulcrum;
A base end is provided between the fulcrum and the other end of the swing rod, and is attached to be rotatable around an axis of the swing rod, and has a leg to which an auxiliary wheel is attached at the tip. A movable auxiliary wheel mechanism characterized by that. The slide body includes a main body and a connecting portion that is attached to an end of the main body and can swing up and down with respect to the main body.
The swing rod includes a connecting hole drilled in the axial direction at the one end,
The movable auxiliary wheel mechanism according to claim 1, wherein a part of the connecting portion is loosely fitted in the connecting hole.   The movable auxiliary wheel mechanism according to claim 1 or 2, wherein a guide hole through which a guide rod for guiding the slide body passes is formed in the slide body. A support portion that is rotatably supported, and a shaft having an end portion that is an axis that forms a predetermined angle with respect to the axis of the support portion;
A movable auxiliary wheel mechanism, comprising: a base end rotatably attached to an axis of the end portion of the shaft; and a leg to which an auxiliary wheel is attached at a distal end.   The movable auxiliary wheel mechanism according to claim 4, wherein an angle formed by the axis of the end portion with respect to the axis of the support portion is variable.   The movable auxiliary wheel mechanism according to any one of claims 1 to 5, wherein a tip end of the leg to which the auxiliary wheel is attached is rotatable around a long axis of the leg.

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