JP3483170B2 - Small vehicle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small vehicle, and more particularly to a small vehicle such as a golf car.

[0002]

2. Description of the Related Art A conventional small vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-189210, in which an engine and a power transmission device are fixed to a rear arm,
A rear arm is swingably suspended on the vehicle body through an elastic body, a rear suspension, and a pair of left and right links.

[0003]

In such a small-sized vehicle, the engine is fixed to the rear arm by the rubber mount in order to prevent the vibration of the engine from being transmitted to the vehicle body side, but the rubber mount is costly. . Further, the rear arm is swingably supported on the vehicle body by using not only the elastic body and the rear suspension but also a pair of left and right links, but there is a problem that the cost is further increased.

The present invention has been made in view of the above circumstances, and provides a small vehicle which is low in cost and which can effectively reduce the transmission of vibration to the vehicle body regardless of changes in the load applied to the vehicle body. Is intended.

[0005]

In order to solve the above problems and to achieve the object, the invention according to claim 1 is a small vehicle in which a rear arm for suspending rear wheels is swingably provided on a vehicle body. An engine and a power transmission device are mounted on the rear arm, the front side of the rear arm is supported on the vehicle body via a link arranged in the vehicle front-rear direction, and a vehicle body side link connection fulcrum between the front side of the link and the vehicle body, On the straight line connecting the rear wheel, the rear arm, the engine, and the center of gravity of the entire power transmission device, the rear side of the link and the rear arm are swingably held so that the arm side link connection fulcrum is substantially positioned, On the other hand, the rear side of the rear arm is supported by the vehicle body via a rear suspension, and the vehicle body-side cushion connection fulcrum of the rear suspension with the vehicle body and the rear suspension are supported. It is characterized in that a straight line viewed from the side connecting the rear arm side cushion coupling fulcrum of the arm is configured to face the ground point a direction substantially rear wheel.

According to a second aspect of the present invention, a front side of the rear arm is swingably supported on the vehicle body at a substantially center thereof, and a rear side of the rear arm is swingably supported on the vehicle body on both sides in a vehicle width direction. Is characterized by.

[0007]

According to the first aspect of the present invention, the vibration caused by the operation of the engine is transmitted from the rear arm to the vehicle body by the link, but the inertial force of the rear wheel, the engine, the power transmission device and the rear arm generated at the time of sudden acceleration / deceleration is the rear arm. The arm-side link connection fulcrum is a straight line that connects the vehicle-body-side link connection fulcrum between the front side of the link and the vehicle body and the center of gravity of the rear wheel, rear arm, engine, and power transmission device. Amplitude evenly in the orthogonal direction,
The vibration of the rear arm is effectively damped, and the transmission of the vibration to the vehicle body is reduced.

Further, since the straight line seen from the side that connects the vehicle body side cushion connection fulcrum with the vehicle body of the rear suspension and the rear arm side cushion fulcrum point with the rear arm of the rear suspension is substantially in the direction of the ground contact point of the rear wheels, the passenger gets on the vehicle. It is possible to reduce changes in the conditions for supporting the rear arm on the vehicle body side in response to changes in the load applied to the vehicle body by personnel, etc., and even if there is a change in the load applied to the vehicle body, vibration from the rear arm to the vehicle body can be effectively suppressed. Can be reduced.

According to the second aspect of the present invention, the front side of the rear arm is swingably supported on the vehicle body at substantially the center, and the rear side of the rear arm is swingably supported on the vehicle body on both sides in the vehicle width direction.
Since it has the point support structure, the cost can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a small vehicle of the present invention will be described in detail below with reference to the accompanying drawings. 1 is a side view of the golf car, FIG. 2 is a front view of the golf car, FIG. 3 is a rear view of the golf car, FIG. 4 is a schematic side view of the body of the golf car, and FIG. 5 is a plan view of a rear arm portion of the golf car. , FIG. 6 is VI-VI of FIG.
7 is a rear view of the rear arm portion of the golf car, FIG. 8 is a side view of the link portion, FIG. 9 is a sectional plan view of the link portion, and FIG. 10 is a plan view of the link.

The vehicle body 2 of the golf car 1 is provided with front wheels 3 on the front left and right sides and rear wheels 4 on the rear left and right sides. A floor 5 is provided in the center of the vehicle body 2, side portions thereof are covered with side protectors 6, a rear side of the vehicle body 2 is covered with a rear cowl 7, and a front side thereof is covered with a front cowl 8 and a front panel 9. Rear bumper 10 on the rear side of the vehicle body 2
However, a front bumper 11 is attached to the front side, and front and rear left and right front pillars 12 are provided on the front side of the vehicle body 2, and the windshield 1 is attached to the front pillar 12.
3 and basket 14 are attached. The basket 14 has a bracket 14a welded to the vehicle body 2 and a bracket 14b welded to the steering post 17.
Is attached to. Rear pillar 1 on the rear side of the car body 2
5 is provided, and the sunroof 16 is supported by the rear pillar 15 and the front pillar 12.

A steering post 17 is provided on the front side of the vehicle body 2.
The steering wheel 18 is attached to the steering post 17. A steering wheel 19 is attached to the upper portion of the steering shaft 18, and the front wheel 3 is steered by operating the steering wheel 19. A front seat 21, a backrest 22, and an armrest 23 are provided on a support frame 20 in the center of the vehicle body 2, and a right side 23a of the armrest 23 is displaced to a left side 23b rearward so that a driver can easily get on and off.

A rear seat 25 is provided on a support frame 24 on the rear side of the vehicle body 2, a front side 27c of a luggage carrier 27 is attached to a rear portion 26a of a backrest 26, and an armrest 28 is further provided by the support frame 24 and the rear pillar 15. It is supported. The loading platform 27 is disposed above the rear cowl 7, the rear side 27a of the loading platform 27 is supported by the rear end of the vehicle body 2 via a support 29, and a reinforcing stay 27b is provided between the front side 27c of the loading platform 27 and the rear pillar 15. Has been fixed. Four golf bags 30 are placed in parallel in the vehicle width direction on the loading platform 27, a putter case 31 is attached to the lower side of the center of the loading platform 27, and a support 32 is provided with a bulge 32. It is installed.

A pair of main frames 4 constituting the vehicle body 2
0 is arranged in the front-rear direction of the vehicle, and cross frames 41 are bridged and welded to each other on the front side, the center, and the rear side of the pair of main frames 40. The front wheels 3 are connected to the main frame 40 via the front suspension 300.
Supported by a front frame 42 welded to the front side of
The steering post 17 is supported on the front frame 42.

Front seat frames 43 to 45 are welded to the center of the main frame 40, and a support frame 20 for supporting the front seat 21, the backrest 22 and the armrests 23 is provided on the front seat frames 43 to 45. The periphery of the frames 43 to 45 is covered with a seat cowl 46. A rear seat frame 47, a seat bracket 48, and a cowl mounting bracket 49 are welded to the rear side of the main frame 40, and the rear seat 25 is attached to the rear seat frame 47 and the seat bracket 48.
Also, the support frame 24 for attaching the armrest 28 is attached. The rear cowl 7 is attached so as to cover the rear seat frame 47, the seat bracket 48, and the cowl mounting frame 49.

The rear side of the pair of left and right main frames 40 is bent and rises, and extends above the engine 50, the power transmission device 51 and the rear wheel 4 when viewed from the side. A rear arm 60 is arranged below the rear side of the main frame 40,
A cross pipe 61 is welded to the center of the rear arm 60. A front engine mounting bracket 62 is welded to the front portion 60a of the rear arm 60, and the cross pipe 61
A rear engine mounting bracket 63 is welded to the engine, and the engine 50 is fastened and fixed to the front engine mounting bracket 62 and the rear engine mounting bracket 63 with bolts 64 and 65. The engine 50 is mounted with the cylinder on the front side.

A power transmission device 51 is arranged on the rear side of the rear arm 60. The front side of the power transmission device 51 is supported by a mounting bracket 66 via a support shaft 67, and the mounting bracket 66 is welded to the cross pipe 61. ing. At the rear side of the power transmission device 51, left and right axle cases 52 are fastened and fixed with bolts 53, and the left and right axle cases 52 are supported by a rear arm 60 by a mounting bracket 54. The axle 55 is arranged in the axle case 52, the power of the engine 50 is transmitted to the axle 55, and the rear wheel 4 is integrally rotatably provided at the tip of the axle 55. The rear wheel 4 is a drum brake 56. Is braked.

The front side of the rear arm 60 is supported by the cross frame 41 of the vehicle body 2 via a link 70 arranged in the longitudinal direction of the vehicle body. That is, the link mounting bracket 71 is welded to the center of the cross frame 41, and the front portion 70 a of the link 70 is connected to the link mounting bracket 71 via the rectangular support shaft 72. Front 7 of link 70
0a is a rectangular inner cylinder 75 with an outer cylinder 73 via a rubber damper 74.
Is supported, and the rectangular support shaft 72 is inserted into and supported by the rectangular inner cylinder 75, and the link 70 is held in a state of being diagonally lifted rearward.

A link mounting bracket 76 is welded to the center of the front portion 60a of the rear arm 60, and a rear portion 70b of the link 70 is connected to the link mounting bracket 76 via a support shaft 77. The rear portion 70b of the link 70 has a bearing 79 (metal bearing or needle bearing) on the outer cylinder 78.
The inner cylinder 80 is supported through the bearings 79, and a grease reservoir 301 is provided between the bearings 79. A support shaft 77 is inserted through an inner cylinder 80 of the link 70 and is rotatably supported. The link 70 is used to swingably support the rear arm 60 on the main frame 40 of the vehicle body 2, and the front side of the link 70 and the vehicle body 2
The arm side link between the rear side of the link 70 and the rear arm 60 is located on a straight line L1 that connects the vehicle body side link connection fulcrum O1 to the rear wheel 4, the rear arm 60, the engine 50, and the center of gravity O2 of the entire power transmission device 51. The connection fulcrum O3 is configured to be substantially positioned.

A stopper 81 is welded to the upper portion of the link 70, and the projections 7 are formed on the front and rear sides of the upper portion of the link 70.
0c and 70d are formed. Further, the support pins 8 integrally formed with the rubber dampers 82 and 83 are provided in the cutouts 71a and 76a of the link mounting brackets 71 and 76, respectively.
4, 85 are detachably provided. The front part 81a and the rear part 81b of the stopper 81 come into contact with the rubber dampers 82 and 83 at the time of sudden acceleration or deceleration to reduce the impact. The rubber dampers 82, 83 are replaced for a predetermined period of time, for example, but even if the rubber dampers 82, 83 are crushed, the projections 70c, 70d provided on the front and rear of the link 70 contact the link mounting brackets 71, 76 for a predetermined time or more. It prevents the 60 from swinging.

On the other hand, on the rear side of the rear arm 60, rear suspensions 90 are arranged on both sides in the vehicle width direction, and an upper portion 90a of the rear suspension 90 is rotatably supported by a bracket 91 via a support pin 92. The bracket 91 is welded to a cross pipe 93 welded to the main frame 40. Also, the rear suspension 90
The lower portion 90b of the bracket is rotatably supported by a bracket 94 via a support pin 95, and the bracket 94 is welded to the axle case 52. A straight line L2 seen from the side connecting the vehicle body side cushion connection fulcrum O4 with the cross pipe 93 of the main frame 40 of the rear suspension 90 and the rear arm side cushion connection fulcrum O5 with the rear arm 60 of the rear suspension 90 is substantially connected to the rear wheel 4. It is arranged so as to face the direction of the point O6.

Further, the rear end of the rear arm 60 is connected by a frame 69, and a bracket 68 is provided on one side of the frame 69. The bracket 68 is arranged in the vehicle width direction via a rubber bush 96 and a bolt 97. It is connected to the ring portion 98a of the support pipe 98. The other ring portion 98b of the support pipe 98 has a rubber bush 9
9. It is attached to a mounting bracket 101 fixed to the left main frame 40 via a bolt 100, and is swingable.

In this way, the front side of the rear arm 60 is swingably supported by the main frame 40 of the vehicle body 2 in the substantially center thereof, and the rear side of the rear arm 60 swings on the main frame 40 of the vehicle body 2 on both sides in the vehicle width direction. Further, the engine 50 and the power transmission device 51 are supported at a low cost by being fixed to the rear arm 60 by a fastening means in a rigid manner without using a rubber mount.

Therefore, the vibration of the engine 50 is transmitted from the engine 50 to the rear arm 60, and the inertial force of the rear wheel 4, the engine 50, the power transmission device 51 and the rear arm 60, which is generated at the time of sudden acceleration / deceleration, is transmitted from the rear arm 60. Link 7 acts to move up and down, but link 7
The link 70 on the straight line L1 that connects the vehicle body side link connection fulcrum O1 between the front side of 0 and the vehicle body 2 and the center of gravity O2 of the rear wheel 4, the engine 50, the power transmission device 51, and the rear arm 60.
Arm side link connection fulcrum O between the rear side and the rear arm 60
Since 3 is held swingably so that it is substantially positioned,
The arm-side link connection fulcrums O3 uniformly oscillate in the direction orthogonal to each other on the straight line L1, and the vibration of the rear arm 60 is effectively damped, and the transmission of the vibration to the main frame 40 of the vehicle body 2 is reduced.

A straight line L2, which is seen from the side surface connecting the vehicle body side cushion connection fulcrum O4 of the rear suspension 90 with the vehicle body and the rear arm side cushion connection fulcrum O5 of the rear suspension 90 with the rear arm 60, is substantially in contact with the rear wheel 4. It is in the direction of the point O6, and it is possible to reduce a change in the supporting condition of the rear arm 60 on the vehicle body side in response to a change in the load applied to the vehicle body 2 by a passenger or the like.
The uniform amplitude state of the arm-side link connection fulcrum O3 does not change even if there is a change in the load applied to the rear arm 60, so that transmission of vibration from the rear arm 60 to the main frame 40 of the vehicle body 2 can be effectively reduced.

Further, the front side of the rear arm 60 is swingably supported on the vehicle body 2 in the substantially center thereof, and the rear side of the rear arm 60 is swingably supported on the vehicle body 2 on both sides in the vehicle width direction, which is low in cost. . Further, the engine 50 and the power transmission device 51 can be rigidly fixed to the rear arm 60 without using a rubber mount. Further, by fixing the engine 50 and the power transmission device 51 to the rear arm 60 in a rigid manner, a member for restricting the displacement between the engine 50 and the power transmission device 51 becomes unnecessary, which further reduces the cost.

[0027]

As described above, according to the first aspect of the present invention, the vibration caused by the operation of the engine is transmitted from the rear arm to the vehicle body by the link, and the rear wheel, the engine and the power transmission device are also generated during the sudden acceleration / deceleration. And the inertial force of the rear arm acts to move the link up and down from the rear arm, but the arm side link connection fulcrum is the vehicle body side link connection fulcrum between the front side of the link and the vehicle body, and the rear wheels, the rear arm, the engine and the power transmission device. Since the straight line connecting the center of gravity of the entire body is evenly oscillated in the orthogonal direction, it is possible to effectively damp the vibration of the rear arm and reduce the transmission of the vibration to the vehicle body.

Further, since the straight line seen from the side surface connecting the vehicle body side cushion connection fulcrum of the rear suspension and the rear arm side cushion connection fulcrum of the rear suspension is approximately in the direction of the ground contact point of the rear wheels, the passenger gets on the vehicle. It is possible to reduce changes in the conditions for supporting the rear arm on the vehicle body side in response to changes in the load applied to the vehicle body by personnel, etc., and even if there is a change in the load applied to the vehicle body, vibration from the rear arm to the vehicle body can be effectively suppressed. Can be reduced.

Further, the engine and the power transmission device can be rigidly fixed to the rear arm without using a rubber mount, and by fixing the engine and the power transmission device rigidly to the rear arm, the engine and the power transmission device can be separated from each other. A member for restricting the displacement is not required between them, resulting in low cost.

According to the second aspect of the invention, since the front side of the rear arm is swingably supported on the vehicle body at the substantially center thereof, and the rear side of the rear arm is swingably supported on the vehicle body on both sides in the vehicle width direction. By supporting the rear arm with the point support structure, the cost of supporting the engine and the power transmission device can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a golf car.

FIG. 2 is a front view of a golf car.

FIG. 3 is a rear view of the golf car.

FIG. 4 is a schematic side view of a body of a golf car.

FIG. 5 is a plan view of a rear arm portion of the golf car.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a rear view of the rear arm portion of the golf car.

FIG. 8 is a side view of a link portion.

FIG. 9 is a cross-sectional plan view of a link portion.

FIG. 10 is a plan view of a link.

[Explanation of symbols]

1 small vehicle 2 car body 4 rear wheels 50 engine 51 power transmission device 60 rear arm 70 links 90 rear suspension

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B60K 5/00 A63B 55/08 B60G 9/04 B62M 7/02

Claims (2)

(57) [Claims] 1. A small vehicle in which a rear arm for suspending a rear wheel is swingably mounted on a vehicle body. An engine and a power transmission device are mounted on the rear arm, and a link in which a front side of the rear arm is arranged in a vehicle longitudinal direction is provided. Via the vehicle body-side link connection fulcrum of the front side of the link and the vehicle body and the center of gravity of the rear wheel, the rear arm, the engine and the power transmission device as a whole, Side and the rear arm are swingably held so that the arm side link connection fulcrum is substantially positioned, while the rear side of the rear arm is supported by the vehicle body via a rear suspension, and the vehicle body side of the rear suspension and the vehicle body side. The straight line seen from the side connecting the cushion connection fulcrum and the cushion connection fulcrum on the rear arm side of the rear suspension and the rear arm is substantially the ground contact point of the rear wheel. Small vehicle characterized by being configured to face the direction. 2. A front side of the rear arm is swingably supported on the vehicle body at a substantially center thereof, and a rear side of the rear arm is swingably supported on the vehicle body on both sides in a vehicle width direction. The small vehicle described in 1.