KR100340597B1 - Tricycle - Google Patents

Abstract

In the present invention, the left and right front wheel support members for rotatably supporting the left and right front wheels, respectively, are rotatably supported on the left and right leg members respectively disposed on the left and right sides of the handle post and supported by the handle post. In a tricycle where a steering shaft is connected to both front wheel support members so as to steer the front wheels according to the turning operation of the steering shaft, and the driving wheels are supported on the rear part of the body frame, a bank is provided. An object of the present invention is to enable running and to improve steering running performance. The handle post 21 and the left leg member 29 _L are connected via a pair of upper and lower left upper and lower links 38 _L and 39 _L so as to constitute a left parallel link 37 _L , and the handle post 21 ) And the right leg member 29 _R are connected via a pair of upper and lower right upper and lower links 38 _R , 39 _R to form a right parallel link 37 _R , 94 _R , and left and right parallel links 37 _L and 37 _R are formed symmetrically with respect to the handle post 21.

Description

Tricycle {TRICYCLE}

The present invention relates to a three-wheeled vehicle that supports a pair of left and right front wheels that can be steered to the front of the body frame and each supports a single rear wheel that can be driven to the rear of the same body frame. It is related with the improvement of the tricycle which enabled bank running in the inclined direction.

In addition, in this specification, "left" and "right" refer to the left side and the right side in the state toward the front of the tricycle.

Background Art Conventionally, a tricycle capable of running on a bank is disclosed in, for example, Japanese Patent Laid-Open No. Hei 6-171569, Japanese Patent Laid-Open No. 56-82681, Japanese Patent Laid-Open No. Hei 1-229787, and the like.

By the way, in the three-wheeled vehicle disclosed by Unexamined-Japanese-Patent No. 6-171569 and 56-82681, since the right and left front wheels are arrange | positioned largely overhanging from the turning-axis, weight reduction of each part is attained. It is very difficult to increase the support rigidity of the front wheels while planning, and if the support rigidity is insufficient, stability in bank running is particularly insufficient. In addition, when the left and right front wheels largely overhang from the forward axis, the inertia moment of the steering system becomes large, making it difficult to perform light steering.

In addition, in the tricycle disclosed in Japanese Patent Application Laid-open No. Hei 1-229787, the left and right front wheels are arranged on the forward axis, but in such an arrangement, a large number of expensive ball joints are used to support the front wheels. This leads to a decrease in the support rigidity and makes it difficult to reduce the cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide an inexpensive tricycle that enables high and stable support of the front and rear wheels and enables stable banking without the use of expensive ball joints. .

1 is a side view of a combined bicycle tricycle in the form of a bicycle of the first embodiment;

Figure 2 is a side view of a combined cart tricycle in the form of a cart.

3 is an enlarged plan view seen from the arrow 3 direction in FIG.

4 is an enlarged sectional view taken along line 4-4 of FIG. 1;

FIG. 5 is an enlarged front view seen from the direction of the arrow 5 in FIG. 1 in the state where the carrier is omitted. FIG.

6 is an enlarged sectional view taken along line 6-6 of FIG. 5;

FIG. 7 is a front view corresponding to FIG. 5 in a state where the vehicle body frame is inclined to the left; FIG.

8 is an enlarged sectional view taken along line 8-8 of FIG. 1;

9 is a sectional view taken along line 9-9 of FIG. 8;

10 is a cross-sectional view taken along line 10-10 of FIG.

11 is a side view of a combined bicycle tricycle in the form of a bicycle of the second embodiment;

FIG. 12 is a front view as viewed from the arrow 12 in FIG. 11; FIG.

FIG. 13 is an enlarged view of a main part of FIG. 12; FIG.

14 is an enlarged sectional view taken along line 14-14 of FIG.

FIG. 15 is a front view corresponding to FIG. 12 in a state where the vehicle body frame is inclined to the left; FIG.

16 is a side view of a combined bicycle tricycle in the form of a bicycle of the third embodiment;

17 is a side view of a combined cart three-wheeled bicycle in the form of a cart.

18 is a side view of a combined bicycle tricycle in the form of a bicycle of a fourth embodiment;

19 is an enlarged view of a main part of FIG. 18;

20 is an enlarged perspective view of the operation lever.

In order to achieve the above object, the present invention is a three-wheeled vehicle that supports a pair of left and right front wheels which can be steered to the front part of the body frame, and each of which supports a single rear wheel which can be driven to the rear part of the same body frame, the front end of the body frame A cylindrical handle post fixedly mounted to the steering wheel to pivotally support a steering shaft leading to the steering wheel, and left and right upper links pivotally pivotally supported at an upper end of the handle post so as to be integrally connected to each other. Left and right lower links pivotally pivotally supported at the lower end of the handle post, cylindrical left leg members pivotally pivotally supported at both ends of the upper left and lower links, and upper and lower right sides Tubular type pivotally supported at both ends of the link to the outer end of the link A left front wheel support member rotatably supported by the left leg member, a right front wheel support member rotatably supported by the right leg member, and a left front wheel supported by the left front wheel support member Is disposed directly below the left leg member, a right front wheel supported by the right front wheel support member is disposed directly below the right leg member, and the steering shaft and the left and right front wheels are disposed below the handle post and both leg members. It is a 1st characteristic that the steering interlocking means which interlocks between each of the support members is arrange | positioned.

In addition, the present invention is a three-wheeled vehicle that supports a pair of left and right front wheels that can be steered to the front of the body frame, and each of the single rear wheels that can be driven behind the same body frame, is fixed to the front end of the body frame steering A cylindrical handle post pivotally supporting a steering shaft following the handle, independent left and right upper links pivotally pivotally supported at an upper end of the handle post, and pivotally pivotally supported at a lower end of the handle post, respectively; Left and right lower links which are independent of each other, a cylindrical left leg member pivotally supported at both ends of the upper and lower ends of the upper left and lower links, and both upper and lower ends pivoting to the outer ends of the upper and lower right links. A cylindrical right leg member possibly pivotally supported; A left front wheel support member pivotally supported by the member, a right front wheel support member pivotally supported by the right leg member, and fixedly installed on at least one of the left and right upper links and the left and right lower links, respectively. A left and a right connecting frame and connecting members each of which is pivotably connected to both connecting frames, and the left front wheel supported by the left front wheel supporting member is disposed directly below the left leg member, and the right front wheel A right front wheel supported by the support member is disposed directly below the right leg member, and steering linkage means for interlocking between the steering shaft and each of the left and right front wheel support members is disposed below the handle post and both leg members. The second feature is one.

Further, the steering linkage means in the first and second features include a pitman arm 31, a knuckle arm 32, and a tie rod 33 in the embodiment of the present invention described later. tie rod) and ball joint 34.

According to the first and second features, the left and right cylindrical leg members are pivotally supported by both the upper and lower left and right links, and by the left and right front wheel support members that are rotatably supported by the left and right leg members. Since the left and right front wheels disposed below the left and right leg members are supported, the overhang of the left and right front wheels to the left and right leg members is eliminated, and both upper and lower ends are firmly supported on each leg member, and the support rigidity of the left and right front wheels is also supported. It can increase effectively. As a result, the stability of bank running can be improved.

In addition, since the overhang of the left and right front wheels to the left and right leg members is eliminated, the inertia moment of the steering system is reduced, and steering can be performed lightly.

Further, since steering steering means for interlocking between the steering shaft and the left and right front wheel support members is disposed below the handle post and the left and right leg members, the steering interlocking means on the front and upper sides of the handle post and the left and right leg members. A large space can be secured without interference, and installation of a carrier or the like becomes easy.

In addition, since the ball joint is not used to support the left and right front wheels as described above, the support rigidity of the front wheels can be easily secured and the cost can be reduced.

In addition, the present invention further returns the handle post to the upright position as the handle post is inclined from the upright position to the left side between the handle post and one of the upper left and lower links in addition to the first or second feature. Although it exhibits elasticity, a left upright posture holding means is provided, which prevents the elasticity of the handle post when it is inclined to the right side from the upright posture, and between the handle post and the other side of the upper right and lower links. While the post is inclined to the right from the upright position, the handle post returns to the upright posture, but the right upright posture maintenance means is provided to prevent the handle post from exerting its elasticity when the post is inclined leftward from the upright posture. The left and right upright posture maintaining means is the handle post In this upright orientation in the upright position and a third characterized in that a resilient for biasing (付 勢) grant.

According to this third aspect, when the body frame is tilted to the left, the elasticity of returning the body frame to the upright position by the left upright position holding means acts on the body frame, and when the body frame is tilted to the right, the right upright. The resilience of returning the vehicle body frame to the upright posture by the posture maintaining means acts on the vehicle body frame. When the tricycle is stopped without riding, the vehicle frame can be used in the upright posture and can ride on the tricycle in peace. In addition, when the vehicle body frame is shifted from the turning driving state in which the body frame is inclined to the straight driving state, the body frame is restored to the upright position, so that the maneuverability can be further improved.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on the Example of this invention shown in an accompanying drawing.

1 to 10 show a first embodiment of the present invention.

First, in FIGS. 1 to 5, the body frame F ₁ of the three-wheeled bicycle combined with the handle post 21, the saddle post 22, the rear frame 23, the lower pipe 24, and the first link pipe ( 25) and a second link pipe 26, the body frame F ₁ can be switched between a bicycle form as shown in FIG. 1 and a folded cart form as shown in FIG. have.

A steering shaft 27 fitted to the handle post 21 is rotatably supported by a handle post 21 extending up and down, and a steering handle 28 is fixed to an upper end of the steering shaft 27. .

In the right and left sides of the handle post 21 in parallel with the handle post 21 it is arranged to the left and right leg members of the cylindrical (29 _L, 29 _R) extending up and down and rotate the left front wheel (W _FL) The left front wheel support member 30 _L freely supporting is rotatably supported by the left leg member 29 _L , and the right front wheel support member 30 _R rotatably supporting the right front wheel W _FR is the right leg member ( 29 _R ) is pivotally supported. At that time, the left front wheel W _FL is disposed directly below the left leg member 29 _L , and the right front wheel W _FR is disposed directly below the right leg member 29 _R , respectively.

The lower end of the handle post 21 than the lower side while the steering shaft 27, the lower end of, the Pitman arm and 31 is attached is fixed, lower, yet the left and right than the lower ends of the left and right leg members (29 _L, 29 _R) a front wheel supporting member (30 _L, 30 _R), the knuckle arms 32, 32 are fixed, respectively. Both ends of the tie rods 33 and 33 are connected to the pitman arm 31 and the knuckle arms 32 and 32 via the ball joints 34 and 34.

As a result, the pitman arm 31 pivots left and right through the steering shaft 27 as the steering wheel 28 is pivoted left and right. The knuckle arms 32 and 32 pivot from side to side, and the left front wheel W _FL and the right front wheel W _FR are turned left and right.

An attachment stay 35 protruding forward is fixedly attached to the middle portion of the handle post 21, and a carrier 36 is attached to the attachment stay 35. And the carrier 36 is preferably configured to be able to switch to the use state (state shown by the solid line of FIG. 1) protruding forward and the non-use state (state shown by the dashed line of Figure 1) folded back. Do.

The handle post 21 and the left leg member 29 _L are connected via the upper left link 38 _L and the lower left link 39 _L , 39 _L to form a left parallel link 37 _L , and the handle post 21 and the right leg member 29 _R are connected via a right upper link 38 _R and a right lower link 39 _R , 39 _R to form a right parallel link 37 _R , wherein the left and right sides a parallel link (37 _L, 37 _R) are formed symmetrical with respect to the handle post 21.

The left and right upper links 38 _L , 38 _R are pipe-like members, integrally formed and disposed in front of the handle post 21 and both leg members 29 _L , 29 _R , and both upper links 38. _L , 38 _R ) is pivotally connected to the handle post 21 via a connecting pin 40 having an axis extending back and forth. In addition, the outer ends of the left and right upper links 38 _L and 38 _R are connected to both of the leg members 29 _L and 29 _R via connecting pins 41 and 41 having axes parallel to the connecting pins 40. It is pivotally connected to the upper part.

Left and right lower link _{(39 L, 39 R; 39} L, 39 R) be a pipe-like and integrally formed, the handle post 21 and the two leg members held at about a (29 _L, 29 _R) Is placed in position. And the amount of the lower link _{(39 L, 39 R; 39} L, 39 R) connected to the installation part connection pin (42, 42) for turning the handle post as a medium (21) having an axis parallel with the connecting pin 40 of the Possibly connected, and the outer ends of both lower links 39 _L , 39 _R ; 39 _L , 39 _R mediate connecting pins 43, 43... With connecting axes 42, 42. the legs are pivotally connected to the lower portion of the member (29 _L, 29 _R) to.

In the left parallel link (37 _L), the handle post 21, the left upper and lower links _{(38 L; 39 L, 39} L) of one side, for example the lower left link left there between (39 _L, 39 _L) upright posture holding is provided with means (44 _L), according to the right parallel link (37 _R), the handle post 21, a right side upper and lower link; one of (38 _L 39 _R, 39 _R), for example the lower right link to the right upright posture holding means (44 _R) between (39 _R, 39 _R) are installed.

6, the left upright posture holding means (44 _L) are both lower left link (39 _L, 39 _L) is provided between the fixed bracket plate (45, 45), the left parallel link (37 _L) each in A support shaft 46 having an axis parallel to each of the connecting pins 40 to 43, a guide rod 47 extending in the vertical direction and having a lower end pivotably supported by the support shaft 46; Retainer 49 disposed between the movable barrel 48 coaxially enclosing 47 and both left lower links 39 _L , 39 _L and fixedly attached to the lower part of the guide rod 47. And a coil spring 51 which is fixedly attached to the movable cylinder 48, and a coil spring 51 which is reduced in size between the fixed retainer 49 and the movable retainer 50 by surrounding the guide rod 47. ) And the upper end of the movable cylinder 48 to contact the handle post 21 It is provided with a contact plate (52).

A support cylinder 53 which extends toward the left leg member 29 _{L on the} handle post 21 while being a middle portion between the upper and lower links 38 _L ; 39 _L , 39 _{L in the} left parallel link 37 _L. The fixing plate is fixed, and the contact plate 52 is fixed to the distal end of the supporting cylinder 53. The contact plate 52 is provided with a guide hole 54 for freely inserting the guide rod 47 therethrough, and an upper end portion of the guide rod 47 penetrates through the contact plate 52 to protrude upward.

The inner surface of the lower end of the movable cylinder 48 is fixed to the inward flange 55 protruding radially inward by enclosing the guide rod 47, and the guide rod 47 of the movable cylinder 48 is fixed. A restrictive flange 56 protruding radially outward so that the outer periphery is in sliding contact with the inner surface makes it possible to contact the upper surface of the inward flange 55 and is fixedly attached. Furthermore, in the state where the handle post 21 is in an upright position, the inward flange 55 of the movable cylinder 48 urged upward by the coil spring 51 is brought into contact with the regulating flange 56. The flange 56 is fixedly attached to the guide rod 47, wherein the upper end of the movable cylinder 48 is in contact with the lower surface of the contact plate 52 or at a position very close to the lower surface of the contact plate 52. As such, the axial length of the movable barrel 48 and the fixed attachment position of the inward flange 55 relative to the movable cylinder 48 are set.

In addition, the nut 57 is fastened to the lower part of the guide rod 47 so that the retreat position can be adjusted, and the inward flange 55 is brought into contact with the nut 57, whereby the nut 57 moves downward to the lower side of the movable cylinder 48. The moving end is regulated.

By the way, by being with the handle post 21, left and right leg members (29 _L, 29 _R) between the left and right in parallel to between the link (37 _L, 37 _R) is configured, as shown in Figure 7, the two leg members (29 _L, 29 _R) with the slope of the left side of the handle post 21, but can also tilt to the left, in this case, the contact plate 52 in the left upright posture holding means (44 _L) By pressing the movable cylinder 48 downward while compressing the coil spring 51, the contact plate 52, that is, the handle post 21, has the elasticity to return the handle post 21 to the upright position. do. On the other hand, when the handle post 21 is inclined from the upright position to the right, the contact plate 52 is restricted because the upper limit position of the movable cylinder 48 is restricted by the inward flange 55 contacting the regulating flange 56. It is moved and inclined to the right side away from the upper end of the can barrel 48, and does not act on the resilient handle post 21 from the left upright posture holding means (44 _L).

Right upright posture holding means (44 _R) are the components having the left upright posture holding means (44 _L) and the same configuration basically omit the detailed explanation, however, the handle post 21 in accordance with the inclination of luggage to the right from the upright position this exerts an upright posture holding means (44 _R), the right elasticity to return the handle post 21 toward the upright position but, when the handle post 21 is inclined to the left from the upright posture, the right upright posture holding means (44 Elasticity does not act on the handle post 21 from _R ).

8 and 9 together, the rear frame 23 has a pair of frame plates 60 and 60 parallel to each other and an axis parallel to the axis of rotation of the left and right front wheels W _FL , W _FR . A cylindrical member 61 which protrudes outwardly from both frame plates 60 and 60 to connect between both frame plates 60 and 60, and both frame plates 60 and 60 and a cylindrical member 61. It consists of a pair of left and right pipe-shaped rear forks 62 and 62 fixedly attached to the two rear forks 62 and 62, when the body frame F ₁ is in the form of a bicycle as shown in FIG. The rear wheels W _R which are driving wheels are pivotally supported at the rear ends of both rear forks 62 and 62, inclined downward from both frame plates 60 and 60 and the cylindrical member 61.

The crankshaft 64 is rotatably supported by the cylindrical member 61 via the ball bearing 63, and the crank pedals 65 and 65 are fixed to the both ends of the crankshaft 64. As shown in FIG. Furthermore, the drive sprocket 66 is fixed to the crankshaft 64 while being the right side of the cylindrical member 61, and the driven sprocket 67 fixed to the rear wheel W _R and the endless chain to the drive sprocket 66 are fixed. (68) is wound. Accordingly, the rear wheel W _R is driven to rotate by operating the two crank pedals 65 and 65.

The saddle post 22 extends upward from the rear frame 23, and the lower end of the saddle post 22 has an axis parallel to the crankshaft 64 and is installed between the two frame plates 60 and 60. The pivot shaft (bolt in this embodiment) 69 is pivotally connected to the rear frame 23, and the saddle 70 is installed at the upper end of the saddle post 22.

The lower pipe 24 connects between the lower part of the handle post 21 and the rear frame 23, and one end of the lower pipe 24 is attached to the bracket 71 installed at the lower part of the handle post 21. Pivotally connected via a pivot axis 72 having an axis parallel to the pivot axis 69, and the other end of the lower pipe 24 has an axis parallel to the pivot axis 72 and both frame plates 60. 60 is pivotally connected to the rear frame 23 via a pivot shaft 73 (bolt in this embodiment), which is provided between the two shafts.

The first link pipe 25 connects the vertical middle portion of the saddle post 22 with the longitudinal middle portion of the lower pipe 24, and the bracket 74 is fixedly attached to the vertical middle portion of the saddle post 22. ), One end of the first link pipe 25 is connected via a pivot shaft (bolt) 75 in this embodiment having an axis parallel to the respective pivot axes 69, 72, 73, and the lower pipe ( A pivot shaft (bolt in this embodiment) 77 having an axis parallel to the pivot shaft 75 at the other end of the first link pipe 25 in a bracket 76 fixedly attached to the longitudinal middle portion of the shaft 24. ) Is connected via the media.

The second link pipe 26 connects the vertical middle portion of the handle post 21 with the longitudinal middle portion of the first link pipe 25, and the bracket is fixedly attached to the vertical middle portion of the handle post 21. One end of the second link pipe 26 is connected to the 78 via a pivot axis 79 having an axis parallel to the respective pivot axes 69, 72, 73, 75, 77, and the first link pipe. A pivot shaft (bolt in this embodiment) having an axis parallel to the pivot shaft 79 at the other end of the second link pipe 26 on the bracket 80 fixedly attached to the longitudinal middle portion of the (25) ( 81).

The handle posts 21, saddle posts 22, which are pivotally connected to each other via the pivot axes 69, 72, 73, 75, 77, 79, and 81 so as to constitute the body frame F ₁ , The rear frame 23, the lower pipe 24, the first link pipe 25 and the second link pipe 26 are left and right front wheels W _FL , W _FR and rear wheels W _R as shown in FIG. 1. And the rear wheel W _R away from the ground between the left and right front wheels W _FL and W _FR in the grounded state as shown in FIG. The link mechanism which can be switched to cart form is comprised.

And in order to facilitate the switching operation of the bicycle form and the cart form, the grip portion 82 is provided at the upper end of the saddle post 22 to protrude toward the rear of the saddle 70.

By the way, when the vehicle body frame F ₁ is in the form of a cart, as shown by the broken line in FIG. 2, the fastening means 83 such as a rubber band or a string member, for example, the steering shaft 27 and the saddle post 22. ) To keep the cart shape. When the vehicle body frame F ₁ is in the form of a bicycle, the locking means 84 can maintain the bicycle form of the vehicle body frame F ₁ .

The lock means 84 comprises a handle post 21, a saddle post 22, a rear frame 23, a lower pipe 24, a first link pipe 25 and a second link constituting the vehicle body frame F ₁ . It is installed between the saddle post 22 and the rear frame 23 of the pipe 26.

The locking means 84 has a resilience force against the riding load acting between the saddle post 22 and the rear frame 23 when the body frame F ₁ is in the form of a bicycle and acting from the saddle post 22. A saddle post 22 and a rear frame 23 are detachably attached to the elastic member 85 made of an elastic material such as rubber, which is fixed to the rear frame 23 so as to exert pressure, and the saddle post 22. Fastening member 86 attached to the rear frame 23 so as to maintain the relative position.

Referring to Figure 10 as well, in between the two frame plates (60, 60) of the rear frame 23, the vehicle body frame (F ₁₎ the support plate (87 facing the rear of the saddle post 22 when this bicycle type ), The bullet member 85 is fixedly attached to the support plate 87 with an arcuate concave contact surface 85a facing the saddle post 22, corresponding to the rear surface of the saddle post 22, which is a pipe. do. When the body frame F ₁ is in the form of a bicycle, the bullet member 85 is sandwiched between the saddle post 22 and the support plate 87 fixedly attached to the rear frame 23, from the saddle post 22. The elastic member 85 exhibits the elastic force against the acting riding load. Moreover, the elastic force exerted by the elastic member 85 acts on the saddle post 22 in the direction of pivoting the saddle post 22 forward around the axis of the pivot axis 69 while simultaneously pivoting the rear frame 23. The rear frame 23 acts on the rear frame 23 in a direction pivoting rearward around the axis 73. The saddle post 22 and the rear frame 23 have a cart like force in the cart form. Will act on the side.

The base of the fastening member 86 is pivotally supported by an axis 88 which has an axis parallel to the crankshaft 64 and is provided between both frame plates 60 and 60, and the fastening member A hook-shaped fastening hook portion 86a is provided at the distal end of 86. On the other hand, the saddle post 22 is fixedly attached with a substantially U-shaped locking member 91 to which the fastening hook portion 86a can be fastened, so that the carcass member when the body frame F ₁ is in the form of a bicycle. By engaging the fastening hook portion 86a to the locking member 9l while compressing the 85, the relative position of the saddle post 22 and the rear frame 23 is maintained.

In addition, a torsion spring 89 is formed between the fastening member 86 and the support plate 90 fixedly attached to one inner surface of both frame plates 60 and 60, and the torsion spring 89 is provided. ), The fastening member 86 is pivoted in the direction of fastening the fastening hook portion 86a to the locking member 91.

Moreover, the operation part 86b is integrally provided in the base of the fastening member 86 so that it may protrude outward along the radial direction of the shaft 86, and a fastening hook part 86a is made by engaging a finger to this operation part 86b and operating it. ), The fastening member 86 can be operated in a direction to separate from the locking member 91.

Next, the operation of the first embodiment will be described. When the body frame F ₁ is expanded as shown in FIG. 1 to form a bicycle, a combined-use tricycle can be used as a bicycle. At this time, when the body frame F ₁ is deployed to form a bicycle, the handle post 21, the saddle post 22, the rear frame 23, and the lower pipe constituting the body frame F ₁ are formed. The locking means 84 is provided between the saddle post 22 and the rear frame 23 of the first link pipe 25 and the second link pipe 26, and is provided by the lock means 84. The relative position of the saddle post 22 and the rear frame 23 is maintained, and the bicycle shape of the body frame F ₁ is maintained.

In addition, the locking means 84 has an elastic member 85 which is sandwiched between the saddle post 22 and the rear frame 23 and exerts an elastic force against the riding load. The handle post 21 and the saddle post (22), even if the fabrication accuracy and the assembly precision of the rear frame 23, the lower pipe 24, the first link pipe 25 and the second link pipe 26 are somewhat inferior, the handle post 21, The saddle post 22, the rear frame 23, the lower pipe 24, the first link pipe 25 and the second link pipe 26 to absorb the fabrication error or assembly error to the elastic member 85 to handle Ride comfort by preventing rattling between post 21, saddle post 22, rear frame 23, lower pipe 24, first link pipe 25 and second link pipe 26 Can be improved, and the elastic member 85 exhibits an elastic force against the riding load. Improve syeonseong is possible to further improve the ride comfort.

In addition, the right and left inclination of the back to the handle post 21, the left and right leg members (29 _L, 29 _R), since the left and right parallel links (37 _L, 37 _R) is formed between, the handle post 21, Accordingly, both leg members 29 _L and 29 _R are also inclined to the left and right, the left and right front wheels W _FL and W _FR can be tilted to the left and right, and the bank which inclines the body frame F ₁ to either of the left and the right banks. It becomes possible to run and can improve steering runability.

In addition, both parallel to the left and right upper link of the link _{(37 L) (37 L,} 38 R) are formed integrally, both parallel link (37 _L, 37 _R) left and right lower link (39 _L in , 39 _L ; 39 _R , 39 _R ) are also integrally formed so that the number of parts constituting the left and right parallel links 37 _L , 37 _R can be reduced as much as possible to reduce the number of assembly steps. do.

Further, between the handle post 21 and the left lower link 39 _L , 39 _{L of the} left parallel link 37 _L , the handle post 21 is erected as the handle post 21 is inclined from the upright position to the left side. exert a resilient return towards the position, but the holding means (44 _L) the left upright position by preventing exhibiting elasticity when the handle post 21 is inclined to the right from the upright position is provided, and the right parallel link (37 _L) Between the handle post 21 and the lower right link 39 _R , 39 _R of the handle post 21 is inclined from the upright position to the right, thereby exerting elasticity to return the handle post 21 to the upright position. the handle post 21 is left to right upright posture holding means (44 _R) which prevent to exert elasticity when tilted from the upright position are provided. Therefore, when the body frame F ₁ is tilted to either of the left and right sides, the elasticity for returning the body frame 21 to the upright position acts on the body frame F ₁ , and the tricycle stops without riding. When the vehicle is in the upright position, the three-wheeled bicycle can be safely used with the body frame F ₁ in an upright position. When the vehicle body frame F ₁ shifts from the turning driving state in which the body frame F ₁ is inclined, the body frame F ₁ is used. Restoration to this upright position can further improve maneuverability.

In particular, the left and right cylindrical leg members 29 _L and 29 _R are pivotally supported at both upper and lower ends by the left and right upper and lower links 38 _L and 38 _R ; 39 _L and 39 _R , and also the left and right leg members 29. _L, left and right front wheels (W _FL, W _FR is disposed just below the 29 _R) for rotatably supporting the left and right front wheel supporting member (30 _L, 30 _R), the bridge members of the left and right (29 _L, by 29 is _R) in) Since this is supported, the overhang of each of the left and right front wheels W _FL and W _FR toward each of the leg members 29 _L and 29 _R is eliminated, and each leg member 29 _L and 29 _R is firmly supported at both upper and lower ends. At the same time, the support rigidity of the left and right front wheels W _FL and W _FR can be effectively increased, and as a result, the stability of the bank running can be improved.

In addition, since the overhang of the left and right front wheels W _FL and W _FR toward the side of each of the leg members 29 _L and 29 _R has been eliminated, the inertia moment of the steering system can be reduced and steering can be performed lightly.

Further, steering interlocking means, ie, the pitman arm 31, the knuckle arm 32, and the tie rod 33, which interlock between the steering shaft 27 and the left and right front wheel support members 30 _L and 30 _R , respectively. And the ball joint 34 is disposed below the handle post 21 and the left and right leg members 29 _L and 29 _R , so that the front surface of the handle post 21 and the both leg members 30 _L and 30 _R may be It is possible to secure a large space that is not interfered with the steering linkage means on the upper side, it is easy to install the carrier 36 and the like.

In addition, since the ball joint is not used to support the left and right front wheels W _FL and W _FR as described above, the support rigidity of the front wheels W _FL and W _FR can be easily secured and the cost can be reduced. Can be.

When using a combined-use tricycle as a two-wheeled cart, the relative position lock state of the saddle post 22 and the rear frame 23 by the locking means 84 is released while the body frame F ₁ is in the form of a bicycle. The body frame F ₁ can be folded by holding the grip portion 82.

At this time, since the elastic member 85 of the locking means 84 exerts the elasticity that biases the saddle post 22 and the rear frame 23 toward the cart form, the saddle post 22 and the rear frame ( When the fastening member 86 is pivotally operated by the operation portion 86b to release the relative position holding of the 23, the saddle post 22 and the rear frame 23 are cart-shaped due to the repulsive force of the elastic member 85. Since it is stressed to become, it becomes easy to switch operation from bicycle type to cart type.

In the state where the body frame F ₁ is folded in the form of a cart, the rear wheel W _R is separated from the ground and the rear wheel W _R is inserted between the left and right front wheels W _FL and W _{FR in a} grounded state. A combined tricycle can be used as a two-wheeled cart. At this time, since the rear wheel W _R away from the ground is not driven from the ground according to the movement of the cart, the crank pedals 65 and 65 do not rotate, and thus the cart is not disturbed by the crank pedals 65 and 65. Freely move forward and backward

11 to 15 show a second embodiment of the present invention.

First, in FIGS. 11 and 12, the handle post 21 and the left leg member 29 _L form a pipe-shaped upper left link 95 _L and a pipe-shaped lower left link to form a left parallel link 94 _L. Connected via 96 _L , the handle post 21 and the right leg member 29 _R form a pipe-shaped upper right link 95 _R and a pipe-shaped lower right to form a right parallel link 94 _R. Linked via a link 96 _R , the left and right parallel links 94 _L , 94 _R are formed symmetrically with respect to the handle post 21.

The upper part of the handle post 21 is fixedly attached to a pair of upper support plates 97... Which extend from side to side by holding the handle post 21 back and forth, and the handle post 21 below the handle post 21. ) Is fixedly attached to a pair of lower support plates 98... In addition, the upper bracket (99 _L, 99 _R), the left and right leg members (29 _L, 29 _R) corresponding to the upper support plate (97 ...) at the same time that is fixed to the lower in response to the lower support plate (98 ...) The brackets (100 _L and 100 _R ) are fixedly attached.

The inner ends of the left and right upper links 95 _L and 95 _R pivot at both ends of the upper support plate 97... Through the connecting pins 101, 101 having axes along the front and rear directions of the body frame F ₁ . The outer ends of the left and right upper links 95 _L , 95 _{R are} possibly connected via the upper brackets 99 _L , via connecting pins 102, 102 having axes parallel to the connecting pins 101. 99 _R ) is pivotally connected.

In addition, the inner end is the connecting pin (101 ..., 102 ...) and having an axis parallel connecting pins (103, 103) a lower support plate as a medium (98, ...) of the left and right lower link (96 _L, 96 _R) It is pivotally connected at both ends, and the outer ends of the left and right lower links 96 _L and 96 _R are connected to the lower brackets via connecting pins 104 and 104 having axes parallel to the connecting pins 103. 100 _L , 100 _R ) is pivotally connected.

In such a parallel link (94 _L, 94 _R), the left and right upper link (95 _L, 95 _R) are have independently of each other, and because the left and right lower link (96 _L, 96 _R) are independent of each other, the structure is in anyway to allow the two leg members (29 _L, 29 _R), the handle post 21 is parallel both to move up and down link (94 _L, 94 _R) with respect to the.

So, in the connecting frame (105 _L, 105 _R) is provided, respectively, connecting members (106, 106) is the amount of the connecting frame (105 _L, 105 _R) at both ends of the left and right lower link (96 _L, 96 _R) Are pivotally connected to each other.

13 and as well as to Figure 14, the connecting frame (105 _L) provided in the lower left link (96 _L) is installed integrally connected to an inner end portion of the lower left link (96 _L) upright pipe which extends upward ( 107 _L ) and the connecting pipe 108 _L connecting between the middle of the lower left link 96 _L and the upper part of the upright pipe 107 _L , which is configured in a substantially triangular shape, and also the lower right link 96 _R. The connecting frame 105 _R installed in the upright pipe 107 _R is integrally installed at the inner end of the lower right link 96 _R and extends upward, and the middle portion and the upright of the lower right link 96 _R. a connection for connecting the upper portion of the pipe (107 _R), the pipe 108 is composed of a substantially triangular shape.

The connecting members 106 and 106 are made of a strip-like flat plate, and are disposed at positions sandwiching the handle posts 21 back and forth. Both ends of these connecting members 106 and 106 are pivotally connected to the upper portions of the upright pipes 107 _L and 107 _R in both connecting frames 105 _L and 105 _R through the connecting shafts 109 and 109. do.

And connections provided on the lower left link (96 _L) frames (105 _L) and, both ends of which are pivotally connected to the connecting frame, the connecting member _{(106, 106) (105 R} ) , which is installed in the lower right link (96 _R) in, the two leg members (29 _L, 29 _R), the handle post 21 is parallel both to move up and down link (94 _L, 94 _R) is to the handle post 21, so that it does not allow for by the simple structure as long as withstand the applied load, it is possible to maintain the function of the left and right parallel links (94 _L, 94 _R).

That is, as shown in FIG. 15, both leg members 29 _L and 29 _R are inclined left and right according to the inclination of the handle post 21 to the left and right, and the body frame F ₁ is inclined to either of the left and right sides. It is possible to run the bank running, improving the steering running performance.

In the left parallel link (94 _L), the handle post 21, the left upper and lower links one of (95 _L, 96 _L), for example, the lower left link (96 _L), a left upright posture holding means between the (110 _L ) is provided, and in the right parallel link 94 _R , the right side is disposed between the handle post 21 and one of the upper right and lower links 96 _R and 96 _R , for example, the right lower link 96 _R. the upright position maintaining means (110 _R) is provided.

The left upright posture holding means (110 _L), the guide tube 111 are respectively closed by having the axis of the both end portions only at the same time be fixed to the handle post 21, the sub-wall member (112 _L, 112 _R) extending in the horizontal direction and The guide rod 113 and the guide rod 113 coaxially disposed in the guide cylinder 111 are fixedly attached to both end wall members 112 _L and 112 _R to allow the slide to move along the guide rod 113. a movable cylinder (114 _L), a movable barrel (114 _L), the end wall member (112 _L), close-up spring 115 and a guide barrel to exert elasticity in the direction of the (111) housed in 111) A contact arm 117 _L installed on the movable cylinder 114 _L so as to protrude downward from the slit 116 _L provided on the lower left side wall, and the connecting pin 101 at the upper end of the connecting frame 105 _L. ~l04) and rotated by the support shaft (118 _L) having an axis parallel mediated At the same time oil is not freely available and a contact roller (119 _L) from the axial direction to the outside of the guide tube 111, the contact arms (117 _L).

In addition, the right upright posture holding means (110 _R) is a guide tube 111, a guide rod 113 and the spring 115 to the left upright posture holding means (110 _L) and that in common, the guide rod 113, The movable cylinder 114 _R is housed in the guide cylinder 111 and the movable cylinder protrudes downward from the slit 116 _R provided on the lower right side wall of the guide cylinder 111. 114 _R ) is freely rotatably supported via a contact arm 117 _R installed at the upper end of the connecting frame 105 _R and a support shaft 118 _R having an axis parallel to the support shaft 118 _L at the upper end of the connecting frame 105 _R. and a contactable roller (119 _R) from the axial direction to the outside of the guide tube 111, the contact arms (117 _R).

Both the movable cylinder (114 _L, 114 _R), the guide tube flange which slide contacts the outer periphery to the inner surface of 111 coil springs of the spring (120 _L, 120 _R) that surrounds the fixed attached, and the guide rod (113) 115 is installed between the reduction amount of the flange (120 _L, 120 _L).

And the vehicle body frame (F ₁₎ Ido when eoteul tilted to the left as shown at 15, contact arm while compressing the spring 115 in the left upright posture holding means (110 _L) by the rollers (119 _L) (117 _L ) And the movable barrel 114 _L are pressed to the right. Away from this point, a right upright posture holding means (110 _L) in a movable cylinder (114 _R) is an end wall member and is in contact in (112 _L), the roller (119 _R) is a contact arm (117 _R) It is in the state that became. Therefore, the left upright posture holding means (110 _L), the guide tube 111, the post (21) handles the medium from the resilient return the handle post 21 toward the upright position and to act, a right upright posture holding means (110 _R ) does not give elasticity to the handle post 21. On the other hand, the handle post 21 is when turned inclined to the right from the upright position described above, as opposed to the right upright posture holding means (110 _R) from the guide tube 111, the handle post to the handle post 21, the medium (21 ) for the elastic return toward the upright position and to act, it does not have the elasticity to the left upright posture holding means (110 _L), the handle post (21).

This second embodiment can also produce the same effects as those of the first embodiment.

16 and 17 show a third embodiment of the present invention.

The body frame F _{2 of the two} -wheeled tricycle includes a handle post 21 (see the first and second embodiments, not shown in FIGS. 16 and 17), the saddle post 22, and the rear frame 121. ), The lower pipe 24 and the link pipe 122, the body frame (F ₂ ) is a bicycle form in which the body frame (F ₂ ) as shown in FIG. As described above, the vehicle body frame F ₂ may be converted into a folded cart.

The rear frame 121 includes a cylindrical member 61 for rotatably supporting the crank pedals 65 and 65, a first pipe frame 123 extending downward from the cylindrical member 61 in the form of a bicycle, The second pipe frame 124 extends upward from the tubular member 61 in the form of a bicycle, and the rear wheel W _R extends downward from the tubular member 61 in the form of a bicycle. The rear fork 62 which is pivotally supported and the reinforcement pipe 125 which connects between the upper end part of the 2nd pipe frame 124 and the middle part of the rear fork 62 are integrally connected, and are installed.

One end of the lower pipe 24 is pivotally connected to a bracket 71 installed below the handle post 21 via a pivot shaft 72 having an axis parallel to the axis of rotation of the rear wheel W _R. The lower end of the saddle post 22, the other end of the lower pipe 24 and the front end of the first pipe frame 124 in the rear frame 121 are pivot axes 126 parallel to the pivot axis 72. Are connected in common.

The link pipe 122 connects the vertical middle portion of the handle post 21 and the longitudinal middle portion of the saddle post 22 to a bracket 127 fixedly attached to the vertical middle portion of the handle post 21. One end of the link pipe 122 is connected via a pivot axis 128 having an axis parallel to each of the pivot axes 73 and 126, and a bracket fixedly attached to the longitudinal middle portion of the saddle post 22 ( The other end of the link pipe 122 is connected to the 129 via a pivot shaft 130 having an axis parallel to the pivot shaft 128.

As such, the handle post 21, the saddle post 22, the rear frame 121, which are pivotally connected to each other via the pivot axes 72, 126, 128, 130, and constitute a vehicle body frame F ₂ , As shown in FIG. 16, the lower pipe 24 and the link pipe 122 have a bicycle shape in which the left and right front wheels W _FL and W _FR and the rear wheel W _R are grounded together to maximize the wheel base. As shown in FIG. 17, the link mechanism which can be switched to the folding cart form so that the rear wheel W _R which is separated from the ground may be inserted between the left and right front wheels W _FL and W _FR in a grounded state.

A vehicle body frame (F ₂₎ at this time be in the form of a bike, by a lock means (131, 132) can be maintained in the form of a bicycle body frame (F _2).

The lock means 131 is a saddle post 22 of the handle post 21, the saddle post 22, the rear frame 121, the lower pipe 24 and the link pipe 122 constituting the vehicle body frame F ₂ . And a rear frame 121.

The locking means 131 is made of an elastic material such as rubber, which is fixed to the rear frame 121 by being sandwiched between the saddle post 22 and the rear frame 121 when the body frame F ₂ is in the form of a bicycle. Removably fastened to the member 133 and the locking member 134 installed on the saddle post 22 and attached to the rear frame 121 to maintain the relative position of the saddle post 22 and the rear frame 121. The fastening member 135 is provided.

The bullet member 133 is fixedly attached to the upper end portions of the second pipe frame 124 and the reinforcement pipe 125 in the rear frame 121, and when the body frame F ₂ is in the form of a bicycle, the saddle post ( It is sandwiched between the rear frame 121 and the rear frame 121 to exert an elastic force against the riding load acting from the saddle post 22.

In addition, the locking means 132 is the lower pipe 24 of the handle post 21, the saddle post 22, the rear frame 121, the lower pipe 24 and the link pipe 122 constituting the vehicle body frame (F ₂ ). ) And the saddle post 22.

The locking means 132 is made of an elastic material such as rubber, which is fixed to the lower pipe 24 by being sandwiched between the lower frame 24 and the saddle post 22 when the body frame F ₂ is in the form of a bicycle. An elastic member 136 and a fastening member 138 detachably fastened to the lower pipe 24 and attached to the saddle post 22 to maintain the relative positions of the saddle post 22 and the lower pipe 24. do. The support pipe 137 is integrally connected to the lower pipe 24 so as to face the front end of the saddle post 22 in the form of a bicycle, and the saddle post 22 is connected to the front end of the support arm 137. The bullet member 136 is fixed by making contact with the front surface of the. When the body frame F ₂ is in the form of a bicycle, the elastic member 136 is sandwiched between the support arm 137 and the saddle post 22 to exert an elastic force against the riding load.

In addition, the fastening member 138 is detachably attached to the front end of the support arm 137 when the vehicle body frame F ₂ is in the form of a bicycle, and is attached to the saddle post 22.

According to this third embodiment, in the first and second embodiments, the handle post 21 and the saddle post 22 via the seven pivot axes 69, 72, 73, 75, 77, 79, 81. ), The rear frame 23, the lower pipe 24, the first link pipe 25 and the second link pipe 26 are pivotally connected to each other to form the body frame F ₁ , whereas four pivot axes The handle post 21, the saddle post 22, the rear frame 121, the lower pipe 24 and the link pipe 122 are pivotally connected to each other via the body frame (72, 126, 128, 130). Since F ₂ ) is configured, the configuration of the vehicle body frame F ₂ can be further simplified.

18 to 20 show a fourth embodiment of the present invention.

The posture of the body frame F ₂ when in the form of a bicycle is held by the first and second locking means 141, 142, wherein the first lock means 141 is the saddle of the body frame F ₂ . It is installed between the post 22 and the rear frame 121, and the second locking means 142 is installed between the lower pipe 24 and the saddle post 22.

The first locking means 141 is made of an elastic material such as rubber, which is fixed to the rear frame 121 by being sandwiched between the saddle post 22 and the rear frame 121 when the body frame F ₂ is in the form of a bicycle. The saddle post 22 is detachably fastened to the elastic member 133, the lever 143 pivotally attached to the saddle post 22, and the locking pin 144 installed at one end of the lever 143. And a hook 145 fixed to the rear frame 121 to maintain the relative position of the rear frame 121 and the lever 143 in the direction of fastening the locking pin 144 to the hook 145. It is provided with a torsion spring 146 installed between the lever 143 and the saddle post 22 to exert elasticity.

The bullet member 133 is fixedly attached to the upper end portions of the second pipe frame 124 and the reinforcement pipe 125 in the rear frame 121, and when the body frame F ₂ is in the form of a bicycle, the saddle post ( It is sandwiched between the rear frame 121 and the rear frame 121 to exert an elastic force against the riding load acting from the saddle post 22.

In addition, the second locking means 142 is a bullet member 136 is fixed to the front end of the support arm 137, which is integrally connected to the lower pipe 24, and the locking pin 147 fixed to the support arm 137 And an operating lever 148 pivotably attached to the saddle post 22 so that the operating lever 148 is fastened to the engaging pin 147 when the body frame F ₂ is in the form of a bicycle. Thereby, the bullet member 136 is sandwiched between the lower frame 24 and the saddle post 22 to maintain the relative position of the saddle post 22 and the lower pipe 24.

In addition, as shown in FIG. 20, the operation lever 148 includes a flat plate portion 148a having a support hole 150 through which a support shaft 149 for pivotably attaching to the saddle post 22 is provided. 19, the fastening portion 148b protruding from the outer edge of the flat plate portion 148a toward the support arm 137, and the operation lever 148 are applied by applying a force from the upper side. The first operating portion 148c protruding from the outer edge of the flat plate portion 148a to the opposite side to the fastening portion 148b to pivot in a clockwise direction to fasten the fastening portion 148b to the locking pin 147, and from above. By applying a force, the operation lever 148 is pivoted in the counterclockwise direction in FIG. 19 to release the engagement with the engaging pin 147 of the engagement portion 148b from the outer edge of the flat plate portion 148a. It is provided with the 2nd operation part 148d which protrudes to the opposite side integrally.

In addition, the operation lever 148 is capable of turning clockwise in FIG. 19 from the open position P ₀ to the lock position P _L through the tight position P _T. By turning the operation lever 148 from the open position P ₀ to the tight position P _T , the fastening to the locking pin 147 starts, and the operation is performed from the tight position P _T to the lock position P _L. As the lever 148 turns clockwise in FIG. 19 around the support shaft 149 in the counterclockwise direction in FIG. 19, the pull pin 147 is pulled to gradually compress the elastic member 136. The distance from the axis of the support shaft 149 is formed in circular arc shape.

When the operating lever 148 is pivoted to the lock position P _L by applying the operating force to the first operating portion 148c, the locking pin 147 and the fastening portion 148b are caused by the large elastic force exerted by the elastic member 136. ), The operating lever 148 stops at the lock position P _L unless the operating force is applied to the operating lever 148.

The flat portion 148a of the operating lever 148 is provided with an arc-shaped elongated hole 151 centered on the axis of the support shaft 149. On the other hand, the lower end of the connecting rod 152 extending downward by connecting the upper end to the other end of the lever 143 in the first lock means 141 so as to be pivotable is fastened to the long hole 151, The length of the rod 152 is the length of the connecting rod 152 when the operation lever 148 of the second lock means 142 is in the lock position P _L when the first lock means 141 is in the locked state. It is impossible to unlock the first locking means 141 because the lower end is at the upper end position of the long hole 151, and the operation lever of the second locking means 142 when the first locking means 141 is in the locked state ( When the 148 is in the tight position P _T , the lower end of the connecting rod 152 is located at the lower end of the long hole 151 so that the first locking means 141 can be unlocked, and the second locking means When the operation lever 148 of 142 pivots to the open position P ₀ , the lever ( 143 is pushed up to set the first locking means 141 forcibly unlocking.

According to this fourth embodiment, the first locking means 141 provided between the saddle post 22 and the rear frame 121 of the vehicle body frame F ₂ , the lower pipe 24 and the saddle post 22. The lock state of the first lock means 141 is maintained in accordance with the lock operation of the second lock means 142 while the second lock means 142 provided between the two lock means 142 and the lock release operation of the second lock means 142 are held. Accordingly, the first locking means 141 can be operated to release the lock, thereby interlocking and connecting.

Thus, the body frame F ₂ is the handle post 21, the saddle post 22, the rear frame 121, the lower pipe 24 and the link via the four pivot axes 72, 126, 128, 130. Due to the simple configuration in which the pipe 122 is pivotally connected, in the bicycle form, the relative between the saddle post 22 and the rear frame 121 and the lower pipe 24 and the saddle post 22 Although it is necessary to maintain the position, the first lock means 141 also maintains the locked state by operating the second lock means 142 of the first and second lock means 141, 142, and the second lock means. In accordance with the unlocking operation of the means 142, the first locking means 141 can also be unlocked to facilitate the locking operation and the unlocking operation.

As mentioned above, although the Example of this invention was described above, this invention is not limited to the said Example, A various design change can be made in the range which does not deviate from this invention described in a claim.

For example, in each of the above embodiments, the case where the present invention is applied to a three-wheeled bicycle combined with a cart has been described. However, the present invention can also be applied to a three-wheeled bicycle which is not a dual-cart combined.

In addition, the present invention can be applied not only to three-wheeled bicycles driven by manpower, but also to three-wheeled vehicles having a power source, or to three-wheeled vehicles provided with a power source to assist the manpower.

According to the present invention, it is possible to provide an inexpensive tricycle having high support rigidity of the left and right front wheels and stable bank running without using expensive ball joints, and enabling steering to be performed lightly.

Claims (3)

A vehicle body frame (F ₁₎ the front wheel of the pair of right and left (W _FL, W _FR) can steer the front part of the support, and also a support for the same vehicle body frame (F ₁₎ a single rear wheel (W _R) capable of driving at the end of each In the tricycle, A cylindrical handle post 21 fixedly installed at a front end of the vehicle body frame F ₁ to pivotally support a steering shaft 27 that is connected to the steering wheel 28, and integrally connected to each other so that the handle post ( Left and right upper links 38 _L and 38 _R pivotably pivotally supported at the upper end of the upper part 21, and left and right lower links pivotally pivotally supported at the lower end of the handle post 21 integrally connected to each other. (39 _L, 39 _R) and the left side upper and lower link, the left leg member of the tubular (29 _L) to the outer end of the (38 _L, 39 _L) which is supported top and bottom end portions are pivotally the pivot and the right side upper and Cylindrical right leg member 29 _R , whose upper and lower ends are pivotally pivotally supported at the outer ends of the lower links 38 _R , 39 _R , and left front wheel support rotatably supported by the left leg member 29 _L. Member _30L and the right leg member A right front wheel support member 30 _R rotatably supported at 29 _R , The left front wheel W _FL supported by the left front wheel support member 30 _L is disposed directly below the left leg member 29 _L , and the right front wheel W _FR supported by the right front wheel support member 39 _R. ) Is disposed directly below the right leg member 29 _R , and the steering shaft 27 and the left and right front wheel support members () are disposed below the handle post 21 and both leg members 29 _L and 29 _R. 30 _L, three-wheelers, characterized in that the arrangement of the steering linkage means (31 to 34) for interlocking connection between the each of _R 30). A vehicle body frame (F ₂₎ right and left by the front wheels (W _FL, W _FR) of a pair of possible steering the front part of the support, and also a support for the same vehicle body frame (F ₂₎ a single rear wheel (W _R) capable of driving at the end of each In the tricycle, A cylindrical handle post 21 fixedly installed at the front end of the vehicle body frame F ₂ to pivotally support a steering shaft 27 that is connected to the steering wheel 28, and an upper end of the handle post 21. Independent left and right upper links 95 _L and 95 _R , each pivotably pivotally supported, and independent left and right lower links 96 _L , pivotally pivotally supported at the lower end of the handle post 21, respectively. 96 _R) and the left side upper and lower link (95 _L, 96 _L left leg member of the tubular to be supported and down both ends of which are pivotally pivots the outer ends of) (29 _L) and the right side upper and lower link (95 _R, 96 _R) to the outer end left front wheel supporting member up and down both ends of which are pivotally possibly turning the pivot right leg member of which the support tubular (29 _R) and the left leg member (29 _L) to the support (30 _L of ), and a line to the right leg member (29 _R) Right front wheel support member (30 _R) is movably supported with the left and right upper link (95 _L, 95 _R) and the left and right lower link (96 _L, 96 _R) on the left side are fixed respectively to at least one And a right connecting frame 105 _L , 105 _R and a connecting member 106 having both ends pivotably connected to both connecting frames 105 _L , 105 _R , respectively. The left front wheel W _FL supported by the left front wheel support member 30 _L is disposed directly below the left leg member 29 _L , and the right front wheel W _FR supported by the right front wheel support member 30 _R. ) Is disposed directly below the right leg member 29 _R , and the steering shaft 27 and the left and right front wheel support members () are disposed below the handle post 21 and both leg members 29 _L and 29 _R. 30 _L, three-wheelers, characterized in that the arrangement of the steering linkage means (31 to 34) for interlocking connection between the each of _R 30). The method of claim 1 or claim 2, wherein the handle post 21 and the left side upper and lower link _{(38 L, 39 L; 95} L, 96 L) , the handle post (21) between the one side of the from the upright position The left upright posture maintenance means which exhibits the elasticity which returns the said handle post 21 to an upright posture as it inclines to the left side, but prevents the elasticity when the handlepost 21 is inclined rightward from an upright posture ( 44 _L , 110 _L ) are provided, and the handle post 21 is disposed from an upright position between the handle post 21 and one of the upper right and lower links 38 _R , 39 _R ; 95 _R , 95 _R. The right upright posture maintaining means which prevents the handlepost 21 from exerting elasticity when the handlepost 21 is inclined to the left side from the upright posture while exhibiting the elasticity of returning the handle post 21 toward the upright posture as it inclines to the right ( 44 _R , 110 _R ), and the There tricycle characterized in that the elastic biasing of the upright direction in this upright position of the handle post 21 is _{given; (44 R, 110 R 44} L, 110 L) the left and right upright posture holding means.