JP2005104445A - Rocking vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce tread change of a drive wheel at the time of swinging in a swinging vehicle, to improve maintainability, and to further improve running performance.
In a swing vehicle 330 such as a three-wheeled vehicle or a four-wheeled vehicle in which left and right suspension arms 95 to 98 are attached to the vehicle body frame 11 and the vehicle body frame 11 is swingable to the left and right with respect to the suspension arms 95 to 98. The suspension arms 95 to 98 are provided on the left and right and up and down to form a double wishbone suspension 338, and the left and right rear wheels 14 and 15 are supported by the double wishbone suspension 338. Are connected to an engine on the drive source side via a left power transmission portion 337A and a right power transmission portion 337B as drive shafts extending forward and backward.
[Selection] FIG.

Description

  The present invention relates to a swing vehicle in which a body frame swings left and right with respect to a suspension arm.

There is a swinging vehicle in which one power unit is suspended on a vehicle and left and right wheels are inclined in conjunction with each other (for example, FIG. 10 and FIG. 11 of Patent Document 1).
As another swing vehicle, a tricycle that supports two rear wheels with a rear fork is known (for example, FIG. 1 and FIG. 9 of Patent Document 1).
JP-A 61-125973

10 to 11 of Patent Document 1 are those in which the left and right wheels move in conjunction with each other. However, when the speed of the vehicle becomes high or the change in the state of the road surface is large. It is desirable that the left and right wheels are suspended independently.
On the other hand, FIG. 1 of Patent Document 1 discloses an independently-suspended swing vehicle in which the left and right rear wheels are respectively supported by the rear fork.

FIGS. 1 and 7 of Patent Document 1 will be described with reference to FIGS. 14 (a) and 14 (b) below. FIG. 14C illustrates a state where the tricycle is tilted. In addition, the top view in FIG. 1 of patent document 1 was abbreviate | omitted. Also, the code has been reassigned.
FIGS. 14A to 14C are explanatory diagrams of a conventional rocking vehicle.
(A) is a side view of a tricycle as a swinging vehicle, and a pair of left and right rear forks 502 and 503 are attached to a differential device 501 provided at the lower part of the tricycle so as to be able to swing up and down, and the rear forks 502 and 503 are rearwardly mounted. It shows that the rear wheels 504 and 505 are rotatably attached to the end portions. Reference numerals 506 and 507 denote chains that transmit power from the differential device 501 to the rear wheels 504 and 505.

(B) shows a state in which one of the rear wheels 504 and 505 rides on a convex portion of the road surface. T1 in the drawing indicates the tread (tread) of the rear wheels 504 and 505.
(C) shows the state of the rear wheels 504 and 505 when the tricycle is swung. At this time, the distance between the rear wheels 504 and 505 is T1, but the distance between the contact points of the rear wheels 504 and 505 is T2, and T2> T1. That is, the treads of the rear wheels 504 and 505 are substantially expanded. Moreover, this distance T2 varies depending on the left and right swing angles of the tricycle. As a result, the turning performance changes during turning.

  Further, in the conventional swing vehicle with left and right independent suspensions, and in (a), the chains 506 and 507 require maintenance such as length adjustment and replacement. Furthermore, if the vertical stroke amount of the rear wheels 504 and 505 can be increased, the running performance of the tricycle can be improved.

  An object of the present invention is to eliminate a tread change of a driving wheel during swinging in a swinging vehicle, to improve maintenance performance, and to further improve running performance.

  According to a first aspect of the present invention, in a swing vehicle such as a three-wheel vehicle or a four-wheel vehicle in which left and right suspension arms are attached to the vehicle body frame and the vehicle body frame is swingable to the left and right with respect to the suspension arm, In addition, a double wishbone suspension is provided at the top and bottom, and the left and right drive wheels are supported by the double wishbone suspension, and these drive wheels are connected to the drive source side via a drive shaft extending forward and backward. It is characterized by that.

By supporting the left and right drive wheels with a double wishbone suspension, the left and right wheels are made independent suspensions, and the change in the tread of the left and right drive wheels is reduced.
In addition, the drive shaft is extended back and forth from the drive source side to the drive wheel, and the overall length of the drive shaft is increased while ensuring the bending angle of the joint portion of the drive shaft. Furthermore, maintenance is improved by using a drive shaft.

The invention according to claim 2 is characterized in that the left and right suspension arms are swingably attached to a support shaft provided one above the top and one below at the center of the vehicle body.
The left and right suspension arms are attached to each of the upper and lower shafts to reduce the tread of the left and right drive wheels.

  In the invention according to claim 1, by using a double wishbone suspension, the left and right drive wheels can be independently suspended, and the tread change can be reduced, improving the maneuverability and stability of the swinging vehicle. Can be made. Also, by extending the drive shaft back and forth from the drive source side to the drive wheel, the overall length of the drive shaft can be increased while ensuring the bending angle of the joint portion of the drive shaft without increasing the tread of the drive wheel, The vertical stroke of the drive wheel can be increased, and the running performance of the vehicle can be improved. Furthermore, since a drive shaft is used, adjustment, replacement, etc. are not required, and maintainability can be improved.

  In the invention according to claim 2, by attaching the left and right suspension arms to each of the upper and lower shafts, for example, the vertical strokes of the left and right drive wheels can be increased compared to attaching the left and right suspension arms to different shafts. After securing, the tread can be reduced and the vehicle width can be reduced. Therefore, the swing vehicle can be downsized.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a swing vehicle according to the present invention. The swing vehicle 10 has a front wheel 13 attached to a front portion of a body frame 11 via a front fork 12 and left and right suspension arms at a rear portion of the body frame 11. The rear wheels 14 and 15 (only the reference numeral 14 on the front side are shown) are attached via left and right wheels (described in detail later), and, for example, the vehicle body frame 11 swings left and right with respect to the suspension arm when turning. This is a rocking tricycle that was made possible.

  The vehicle body frame 11 includes a head pipe 17 provided at the front end, a down pipe 18 extending substantially downward from the head pipe 17, and a lower pipe 21 extending substantially U-shaped from the middle of the down pipe 18 to the left and right. , 22 (only the reference numeral 21 on the front side is shown), a center pipe 23 extending rearward from the middle of the down pipe 18, a storage box 24, rear ends of the lower pipes 21, 22 and a center pipe for supporting the fuel tank 26. 23, a center support frame 27 connected to the rear end of the center support frame 27, left and right rear upper pipes 28 and 31 connected to the rear end of the center support frame 27 (only the front side reference numeral 28 is shown), and these rear upper pipes. And a rear down pipe 32 connected to 28, 31.

  More specifically, the swing vehicle 10 has a front fork 12 attached to a head pipe 17 via a steering shaft (not shown) so that the front fork 12 can be steered, and a front wheel 13 is rotatably attached to the lower end of the front fork 12. A handle 34 is attached, and a reinforcing plate 35 is attached to the joint between the lower pipes 21 and 22 and the center support frame 27. These reinforcing plates 35 and 35 (only the reference numeral 35 is shown on the front side) are connected via a rubber mount device 36. The engine 37 is attached, the rear part of the engine 37 is attached to the middle part of the center support frame 27 via a rubber mount rod 38, and the left drive shaft 143 and the right drive shaft 144 (not shown) from the lower rear part of the engine 37 to the rear. ) Extend these left drive shaft 143 and right drive The rear end of each of the eve shafts 144 is connected to rear gear boxes 335 and 336 (only the front side reference numeral 335 is shown), and the left and right rear wheels 14 are connected to the rear portion of the vehicle body frame 11 via a double wishbone suspension 42. 15 is attached.

  Here, 51 is a radiator, 52 is a radiator fan, 53 is a battery, 54 is a seat, 57 is an exhaust pipe extending rearward from the engine 37, 58 is a muffler connected to the rear end of the exhaust pipe 57, and 61 is a muffler 58. It is a reinforcing frame for mounting.

FIG. 2 is a plan view showing the body frame and the rear wheel suspension of the swing vehicle according to the present invention. An arrow (FRONT) in the figure indicates the front of the vehicle (the same applies hereinafter).
The vehicle body frame 11 includes a first cross pipe 71, a second cross pipe 72 and an under cross pipe 73 that connect the left and right lower pipes 21 and 22, and an under frame 74 (thick line) extending rearward from the center of the second cross pipe 72. Left and right underside pipes 76 and 77 attached with the front end connected to the undercross pipe 73 and the rear portion along the underframe 74, and the underframe 74 and the underside pipe. A reinforcing plate 78 is provided between 76 and 77, and an upper cross pipe 81 is provided in the width direction on the loop-shaped center support frame 27.

  The underframe 74 includes a straight portion 83 that constitutes the front half portion and a bent portion 84 that constitutes the rear half portion, and the bent portion 84 includes the front bent portion 85, the front straight portion 86, This is a portion constituted by a rear bent portion 87 and a rear straight portion 88.

  The double wishbone suspension 42 includes a left suspension arm 91 and a right suspension arm 92 attached to a support shaft (not shown; details will be described later) attached to the lower part of the vehicle body frame 11, and these left suspension arms 91. And knuckles 93, 93 attached to the respective distal ends of the right suspension arm 92, and hubs (not shown) rotatably attached to the knuckles 93, 93 via bearings, respectively. Install the rings 14 and 15.

  The left suspension arm 91 includes a left upper arm 95 having a substantially straight shape and a left lower arm 96 having an A shape. The right suspension arm 92 includes a right upper arm 97 having a substantially linear shape and a right lower arm 98 having an A shape.

  FIG. 3 is a rear view of the swing vehicle according to the present invention, and the double wishbone suspension 42 is provided with a buffer mechanism 101 for preventing an impact from being transmitted from the rear wheels 14 and 15 to the vehicle body frame 11. .

  The shock-absorbing mechanism 101 is attached to the left brackets 103 and 104 provided on the upper part of the left lower arm 96 through a support shaft 105 so as to be swingable, and extends substantially upward, and on the upper end of the left link 106. A left bell crank 108 swingably connected via a support shaft 107 and a right bracket 111, 112 provided on the upper portion of the right lower arm 98 are swingably attached via a support shaft 113 and extended substantially upward. The right link 114, the right bell crank 116 swingably attached to the upper end of the right link 114 via a support shaft 115, and the left bell crank 108 and the right bell crank 116 are connected to the upper end of the right link 114 via support shafts 117 and 118, respectively. Left attached to the rear part of the vehicle body frame 11 via a support shaft 119 for connection. And the connecting member 121, support shaft 123 provided on the left bell crank 108, consisting of buffer 125. passed between the support shaft 124 provided on the right bell crank 116.

  The shock absorber 125 acts as a shock absorber when the rear wheels 14 and 15 move up and down, and includes a coil spring 126 that generates an elastic force and a damper 127 that generates a damping force.

  Here, 131 is a support shaft that connects the left upper arm 95 and the knuckle 93, 132 is a support shaft that connects the left lower arm 96 and the knuckle 93, 133 is a support shaft that connects the right upper arm 97 and the knuckle 93, and 134 is This is a support shaft that connects the right lower arm 98 and the knuckle 93.

  Reference numeral 136 in the figure denotes a stroke limiting mechanism provided at the connecting portion between the left and right bell cranks 108 and 116 and the left and right connecting members 121, which regulates the vertical stroke of the rear wheels 14 and 15, An arc-shaped elongated hole 137 provided on both sides of 121, and a stopper pin 138 that passes through the arc-shaped elongated hole 137 and is attached to the left and right bell cranks 108 and 116, respectively.

  FIG. 4 is a perspective view showing the body frame and the rear wheel suspension of the swing vehicle according to the present invention, and shows that the vertical pipe 141 is attached to the under frame 74 and the rear upper pipe 31 of the body frame 11. .

FIG. 5 is a side view of the main part showing the rear part of the body frame of the swing vehicle according to the present invention.
The underframe 74 has a rising portion 151 inclined rearward and upward, a front-rear extension portion 152 extending substantially front and rear from the rear end of the rising portion 151, and a curve from the rear end of the front-rear extension portion 152. A lower extension portion 153 extending downward, a front support bracket 155 attached to the lower portion of the rising portion 151, a rear support cylinder member 156 attached to the lower end portion of the lower extension portion 153, A lower support shaft 157 is attached to the part support bracket 155 and the rear support cylinder member 156, and a part of the double wishbone suspension 42 is attached to the lower support shaft 157.

That is, the left lower arm 96 and the right lower arm 98 are attached to the lower support shaft 157 so as to freely swing up and down. Specifically, the front mounting portion 96a and the rear mounting portion 96b of the left lower arm 96 and the front mounting portion 98a and the rear mounting portion 98b of the right lower arm 98 are rotatably mounted on the lower support shaft 157.
After the lower support shaft 157 is inserted into the rear support cylinder member 156, the lower support shaft 157 is sequentially inserted into the rear mounting portion 98b, the rear mounting portion 96b, the front mounting portion 98a, and the front mounting portion 96a, and is integrated with the front support bracket 155. Assemble by screwing into the nut 158 attached to the.

  The upper support shaft 161 for mounting the left upper arm 95 and the right upper arm 97 of the double wishbone suspension 42 so as to be swingable up and down includes an upper rear support bracket 162 attached to the front portion of the rear down pipe 32 and the vertical pipe 141 side. The bolt is attached to the upper front support bracket 163 attached to the upper part, and is screwed into the nut 164 that is integrally attached to the upper rear support bracket 162 while passing through the attachment hole provided in the upper front support bracket 163. is there. Reference numeral 95a denotes a left attachment portion provided on the left upper arm 95 for rotatably attaching to the upper support shaft 161, and 97a denotes a right attachment portion provided on the right upper arm 97 for rotatably attaching to the upper support shaft 161.

  The support shaft 119 that supports the left and right connecting members 121 includes connecting portions of the rear first bracket 165 attached to the rear down pipe 32 and the under frame 74, and the front and rear extending portions 152 and the lower extending portion 153 of the under frame 74. It is a bolt that is attached to the rear second bracket 166 that is attached to the rear bracket, and is fixed by screwing into a nut 167 that is integrally attached to the rear first bracket 165 after passing through a mounting hole provided in the rear second bracket 166. To do.

  When the underframe 74 swings left and right with respect to the left and right connecting members 121 (that is, the body frame 11 with respect to the left lower arm 96 and the right lower arm 98 connected to the left and right connecting members 121 as shown in FIG. 3). A knighthard damper that generates an elastic force to return the swing to the original position when the left and right swings, and a split case 172 attached to the first rear bracket 165 and the underframe 74, Protruding members (not shown; provided in the case 172) which are integrally attached to the connecting member 121 and project radially from a collar member 173 rotatably fitted to the support shaft 119, and these. And a plurality of columnar rubbers interposed between the recesses between the protruding members and the case 172.

  If the case 172 is tilted together with the vehicle body frame 11 with respect to the above-described protruding member, the columnar rubber sandwiched between the protruding member and the case 172 is compressed, and an elastic force is generated to make the vehicle body frame 11 stand upright. .

  FIG. 6 is a plan view showing a rear wheel suspension according to the present invention. The double wishbone suspension 42 has a lower support shaft 157 attached to a front support bracket 155 and a rear support cylinder member 156. The left lower arm 96 and the right lower arm 98 are attached to the upper support shaft 162, the upper support shaft 161 is attached to the upper rear support bracket 162 and the upper front support bracket 163, and the left upper arm 95 and the right upper arm 97 are attached to the upper support shaft 161. In addition, a knuckle 93 is attached to each tip of the left lower arm 96, and a knuckle 93 is attached to each tip of the right upper arm 97 and the right lower arm 98.

  The left lower arm 96 includes an arm main body 176 having a substantially U-shape in plan view, a front attachment portion 96a and a rear attachment portion 96b provided at each end for attaching the arm main body 176 to the lower support shaft 157, A front / rear bar 177 provided at the front and rear of the arm main body 176, side extension plates 178 and 181 extending from the arm main body 176 to the side of the vehicle body for attaching the knuckle 93, and the left brackets 103 and 104 described above.

  The right lower arm 98 includes an arm main body 183 having a substantially U-shape in plan view, a front attachment portion 98a and a rear attachment portion 98b provided at each end for attaching the arm main body 183 to the lower support shaft 157, A front / rear bar 184 provided on the front and rear of the arm main body 183, side extension plates 186 and 187 extending from the arm main body 183 to the side of the vehicle body to attach the knuckle 93, and the right brackets 111 and 112 described above.

7A and 7B are sectional views of the left drive shaft of the swing vehicle according to the present invention. The right drive shaft has the same structure as the left drive shaft, and a description thereof will be omitted.
In (a), the left drive shaft 143 includes an inner constant velocity joint 191 connected to the engine 37 (see FIG. 1) side, an outer constant velocity joint 192 connected to the rear wheel 14 (see FIG. 3) side, The ball spline mechanism 193 is interposed between the inner constant velocity joint 191 and the outer constant velocity joint 192.

  The inner constant velocity joint 191 includes an inner shaft 195 constituting a part of the ball spline mechanism 193, an inner ring 196 attached to the tip of the inner shaft 195, and a plurality of grooves provided on the outer peripheral surface of the inner ring 196. Balls 198 fitted into outer arc-shaped grooves 197 whose bottoms are curved in an arc shape in the axial direction, cages 201 positioned and slidably fitted to inner rings 196, and outer sides of the cages 201 And an outer ring 202 having a plurality of grooves into which the ball 198 is fitted and the bottom of the groove is curved in an arc shape in the axial direction, and an inner ring 202a formed integrally with the outer ring 202 and in the gear box 41 A shaft portion 203 having a male spline 203a that is spline-coupled to the gear and an annular groove portion 195 provided on the inner shaft 195 Consisting fixed rubber boot 207 and the other end in the band 206 to the annular groove 202b provided on the outer peripheral surface of the outer ring 202 is fixed at one end in the band 204 to.

  The outer constant velocity joint 192 has the same basic structure as the inner constant velocity joint 191, but the inner ring 196 is attached to the end of the outer shaft 211 constituting a part of the ball spline mechanism 193, and the shaft portion 203 is a rear wheel. The male spline 203a is also spline-coupled with the hub, also serving as an axle.

  The ball spline mechanism 193 includes a cylindrical portion 213 as an outer cylinder integrally formed with one end portion of the inner shaft 195, and a plurality of balls 214 (... are shown in the cylindrical portion 213. The same applies hereinafter. .)) And is inserted into one end portion of the outer shaft 211 so as to be axially movable, and the cylindrical portion 213 and the opening portion of the cylindrical portion 213 are sealed to seal between the slide shaft 216. The seal member 217 is provided.

(B) is a sectional view taken along the line bb of (a), and the ball spline mechanism 193 has an axial groove 221 in the axial direction in order to move the balls 214 to the inner surface of the cylindrical portion 213. And axial grooves 222... Are formed in the axial direction to move the balls 214... On the outer surface of the slide shaft 216.
Therefore, in (a) and (b), the outer shaft 211 slides in the axial direction without rotating relative to the inner shaft 195 by the ball spline mechanism 193.

Next, the operation of the rocking vehicle 10 described above will be described.
FIG. 8 is a first rear view showing the operation of the swing vehicle according to the present invention.
For example, when the left rear wheel 14 rises by a movement amount M with respect to the ground 225, both the left upper arm 95 and the left lower arm 96 swing upward with respect to the vehicle body frame 11, specifically the underframe 74. At this time, the left link 106 connected to the left lower arm 96 rises, and accordingly, the left bell crank 108 rotates clockwise as indicated by an arrow A around the support shaft 117.

  Since the right bell crank 116 on the rear wheel 15 side is in a stationary state, the distance between the support shaft 123 of the left bell crank 108 and the support shaft 124 of the right bell crank 116 is reduced, so that the shock absorber 125 is not compressed. Reduce the impact.

FIG. 9 is a second rear view showing the operation of the swing vehicle according to the present invention.
For example, when the vehicle body frame 11, specifically, the underframe 74 swings to the right by an angle θ, the left upper arm 95 and the left lower arm 96 move in parallel, and the right upper arm 97 and the right lower arm 98 move in parallel. . Accordingly, both the rear wheels 14 and 15 are inclined rightward by an angle θ, that is, the camber angle of the rear wheels 14 and 15 is θ. Therefore, when the swing vehicle 10 is swung to the turning side during turning, a force inward in the turning direction, that is, a canvas last is generated on the rear wheels 14 and 15 as in the case of the two-wheeled vehicle. Can be smoothly turned.

  As described above, even if the vehicle body frame 11 swings with respect to the left suspension arm 91 and the right suspension arm 92, the left link 106 and the right link 114 are inclined in parallel. The distance between the bell crank 116 and the support shaft 124 does not change, and the shock absorbing action by the shock absorber 125 does not occur. However, since the underframe 74 is inclined with respect to the left and right connecting members 121, as described with reference to FIGS. 3 and 5, an elastic force is generated in the knighthard damper 171 to return the swinging vehicle body frame 11 to the upright position.

FIGS. 10A and 10B are operation diagrams showing the operation of the drive shaft of the rocking vehicle according to the present invention.
(A) shows the state where the inner constant velocity joint 191 and the outer constant velocity joint 192 are positioned on a straight line.

  In (b), when the rear wheel moves up and down with respect to the gear box, the outer constant velocity joint 192 moves in the direction perpendicular to the axis as indicated by the arrow with respect to the inner constant velocity joint 191, so that the ball spline mechanism 193 has a ball. The slide shaft 216 retreats from the cylindrical portion 213 by a distance D while 214.

FIG. 11 is a perspective view showing a main part of another embodiment of the swing vehicle according to the present invention. The same components as those in the embodiment shown in FIGS.
The oscillating vehicle 330 has a gear box 331 connected to the rear portion of the continuously variable transmission 56, and the drive shaft 332 and the drive shaft 333 extend rearward from the left and right of the rear end portion of the gear box 331, respectively. And the rear ends of the drive shaft 333 are connected to the rear gear boxes 335 and 336, and axles (not shown) protruding from the rear gear boxes 335 and 336 to the vehicle body side are connected to the rear wheels 14 and 15, respectively. By doing so, the rear wheel 14, 15 is driven by power from the engine 37 (see FIG. 1) as a drive source.

  The gear box 331 includes a left constant velocity joint portion 331a and a right constant velocity joint portion 331b that incorporate a constant velocity joint at the rear end, and the rear gear boxes 335 and 336 each include a left constant velocity joint that incorporates a constant velocity joint. Part 335a and right constant velocity joint part 336a.

The drive shaft 332 includes a ball spline mechanism 193, and connects the inner shaft 195 to the left constant velocity joint portion 331a and the outer shaft 211 to the left constant velocity joint portion 335a.
The drive shaft 333 includes a ball spline mechanism 193, and connects the inner shaft 195 (not shown) to the right constant velocity joint portion 331b and connects the outer shaft 211 to the right constant velocity joint portion 336a.

The left constant velocity joint portion 331a, the drive shaft 332, and the left constant velocity joint portion 335a constitute the left power transmission portion 337A and correspond to the left drive shaft 143 shown in FIG.
Further, the right constant velocity joint portion 331b, the drive shaft 333, and the right constant velocity joint portion 336a described above constitute the right power transmission portion 337B.

  The rear gear boxes 335 and 336 transmit power from a vehicle longitudinal axis to a vehicle width axis (that is, an axle) by a pair of bevel gears, and are attached to the vehicle body frame 11 (see FIG. 1). It is supported by a double wishbone suspension 338 (details will be described later).

  The shock absorbing mechanism 341 attached to the double wishbone suspension 338 is swingably attached to the left connecting portion 343 provided on the left lower arm 342 constituting the double wishbone suspension 338 via the support shaft 344 and extends upward. Left link 346, a left bell crank 348 swingably connected to the upper end of the left link 346 via a support shaft 347, and a right connecting portion 352 provided on a right lower arm 351 constituting a double wishbone suspension 338 ( (The shape is the same U shape as that of the left connecting portion 343.) A swingable attachment via a support shaft and a right link 354 extending upward, and a support on the upper end of the right link 354. Right bell crank 357 mounted swingably via shaft 356 In order to connect the left bell crank 348 and the right bell crank 357 via support shafts 361 and 362 (not shown), respectively, the rear portion of the vehicle body frame 11 can swing freely via a support shaft 119 (see FIG. 5). The left and right connecting members 363 are attached to a support shaft 364 provided on the left bell crank 348 and a shock absorber 367 provided between the support shaft 366 provided on the right bell crank 357. Reference numeral 371 denotes a knighthard damper case divided in two.

  The shock absorber 367 acts as a shock absorber when the rear wheels 14 and 15 move up and down, and includes a coil spring (not shown) that generates an elastic force and a damper 373 that generates a damping force.

  FIG. 12 is a perspective view showing a rear wheel suspension in another embodiment of the swing vehicle according to the present invention. The double wishbone type suspension 338 can swing the left upper arm 376 and the right upper arm 377 up and down on the upper support shaft 161. The above-described left lower arm 342 and right lower arm 351 are attached to the lower support shaft 157 so as to be swingable up and down.

  The left upper arm 376 is a member that is attached to the upper support shaft 161 with a U-shaped attachment portion 381 and is swingably attached to the rear gear box 335 (see FIG. 11) with a cylindrical attachment portion 382. The right upper arm 377 is It is a member that is attached to the support shaft 161 and inside the U-shaped attachment portion 381 with a cylindrical attachment portion 383 and attached to the rear gear box 336 (see FIG. 11) with a cylindrical attachment portion 384 so as to be swingable.

The left lower arm 342 includes a front left arm 386 and a substantially H-shaped rear left arm 387 provided behind the front left arm 386.
The rear left arm 387 includes a first arm 391, a second arm 392 provided behind the first arm 391, and a connecting portion 393 for connecting the first arm 391 and the second arm 392 in the front-rear direction. It consists of. The second arm 392 is a member that is connected to the left link 346 by providing the left connecting portion 343 at the tip.

  Here, 395 is a cylindrical mounting portion for attaching the front left arm 386 to the lower support shaft 157, 396 is a cylindrical mounting portion for attaching the front left arm 386 to the rear gear box 335, and 397 is a lower support for the first arm 391. A U-shaped mounting portion for mounting on the shaft 157, 398 is a cylindrical mounting portion for mounting the first arm 391 to the rear gear box 335 in a swingable manner, and 401 is a cylindrical mounting portion for mounting the second arm 392 to the lower support shaft 157. .

The right lower arm 351 includes a front side right arm 403 and a substantially H-shaped rear side right arm 404 provided behind the front side right arm 403.
The rear-side right arm 404 includes a first arm 406, a second arm 407 provided behind the first arm 406, and a connecting portion 408 for connecting the first arm 406 and the second arm 407 in the front-rear direction. It consists of. The second arm 407 is a member that is connected to the right link 354 by providing the right connecting portion 352 at the tip.

  Here, reference numeral 411 denotes a U-shaped attachment portion for attaching the front right arm 403 to the lower support shaft 157, 412 denotes a cylindrical attachment portion for attaching the front side right arm 403 to the rear gear box 336, and 413 denotes the first arm 406 to the lower portion. A cylindrical mounting portion 414 is attached to the support shaft 157 and inside the U-shaped mounting portion 397, 414 is a cylindrical mounting portion for swingably mounting the first arm 406 to the rear gear box 336, and 416 is a lower support for the second arm 407. A U-shaped attachment portion attached to the shaft 157, 417 is a connecting rod that connects the front left arm 396 and the first arm 391, and 418 is a connecting rod that connects the front right arm 403 and the first arm 406.

  11 and 12, the present invention firstly attaches left and right suspension arms 95 to 98 to the body frame 11 and swings the body frame 11 to the left and right with respect to the suspension arms 95 to 98. In a swinging vehicle 330 such as a tricycle or a four-wheeled vehicle that can be moved, suspension arms 95 to 98 are provided left and right and up and down to form a double wishbone suspension 338 and the double wishbone suspension 338 An engine 37 as a drive source side is supported via a left power transmission unit 337A and a right power transmission unit 337B as drive shafts that support the rear wheels 14 and 15 and extend the rear wheels 14 and 15 back and forth (see FIG. 1). ).

  By using the double wishbone suspension 338, changes in the tread of the left and right rear wheels 14, 15 can be reduced, and the maneuverability and stability of the oscillating vehicle 330 can be improved. Further, the left power transmission unit 337A and the right power transmission unit 337A and the right power transmission unit 337A and the right power transmission unit 337B are extended from the engine 37 side to the rear wheels 14 and 15 forward and backward without increasing the tread of the rear wheels 14 and 15. While ensuring the bending angle of the constant velocity joint of the transmission part 337B, the total length of the left power transmission part 337A and the right power transmission part 337B can be increased, and the vertical stroke of the rear wheels 14, 15 can be increased, The running performance of the rocking vehicle 330 can be improved. Furthermore, since the left power transmission unit 337A and the right power transmission unit 337B are used, adjustment, replacement, and the like are not required, and maintenance can be improved.

  Secondly, the present invention is characterized in that left and right suspension arms 95 to 98 are swingably attached to an upper support shaft 161 and a lower support shaft 157, which are respectively provided one above the top and the bottom of the vehicle body.

  By attaching left and right suspension arms 95 to 98 to each of the upper and lower support shafts 161 and 157, for example, the left and right rear wheels 14 can be compared to mounting the left and right suspension arms on separate shafts. , 15 tread can be reduced, and the vehicle width can be reduced. Therefore, the swinging vehicle 330 can be downsized.

  The left power transmission unit 337A and the right power transmission unit 337B illustrated in FIG. 12 may be replaced with the left drive shaft 143 and the right drive shaft 144 illustrated in FIG.

  The rocking vehicle of the present invention is suitable for a tricycle and a four-wheel vehicle.

  It is a side view of the rocking vehicle concerning the present invention.   It is a top view which shows the vehicle body frame and suspension for rear-wheels of the rocking | fluctuation vehicle which concerns on this invention.   It is a rear view of the rocking vehicle concerning the present invention.   1 is a perspective view showing a body frame, a rear wheel suspension, and a drive shaft of a swing vehicle according to the present invention.   It is a principal part side view which shows the vehicle body frame rear part of the rocking | fluctuation vehicle which concerns on this invention.   It is a top view which shows the suspension for rear wheels which concerns on this invention.   It is sectional drawing of the left drive shaft of the rocking | fluctuation vehicle which concerns on this invention.   It is a 1st rear view which shows the effect | action of the rocking | fluctuation vehicle which concerns on this invention.   It is a 2nd rear view which shows the effect | action of the rocking | fluctuation vehicle which concerns on this invention.   It is an operation | movement figure which shows the effect | action of the drive shaft of the rocking | fluctuation vehicle which concerns on this invention.   It is a principal part perspective view which shows another embodiment of the rocking | fluctuation vehicle which concerns on this invention.   It is a perspective view which shows the suspension for rear wheels in another embodiment of the rocking | swiveling vehicle which concerns on this invention.   Illustration of a conventional rocking vehicle

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Body frame, 14, 15 ... Drive wheel (rear wheel), 37 ... Drive source (engine), 95, 96, 97, 98 ... Suspension arm (left upper arm, left lower arm, right upper arm, right lower arm), 157, 161: Support shaft (lower support shaft, upper support shaft), 330: Swing vehicle, 337A, 337B: Drive shaft (left power transmission unit, right power transmission unit), 338: Double wishbone suspension.

Claims (2)

In a swing vehicle such as a three-wheeled vehicle or a four-wheeled vehicle in which left and right suspension arms are attached to the body frame and the body frame is swingable left and right with respect to the suspension arm,
The suspension arms are provided on the left and right and up and down to form a double wishbone suspension, and the left and right drive wheels are supported by the double wishbone suspension and are driven via a drive shaft that extends these drive wheels back and forth. An oscillating vehicle connected to a source side.   2. The oscillating vehicle according to claim 1, wherein the left and right suspension arms are swingably attached to support shafts provided one above the top and one below at the center of the vehicle body.

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