JP4804077B2 - Tricycle - Google Patents

Description

  The present invention relates to a three-wheeled bicycle in which a front frame that supports a front wheel and a seat is swingable to the left and right sides with respect to a rear frame that supports the rear two wheels.

  Conventionally, since a three-wheeled bicycle has two rear wheels, it is difficult to bend compared to a two-wheeled bicycle during turning such as turning a curve. Thus, a swing type three-wheel bicycle has been realized in which the front frame supporting the front wheel and the seat can swing left and right with respect to the rear frame supporting the rear two wheels. That is, when the front frame is tilted to the left or right side with respect to the rear frame, turning can be smoothly performed.

  In the swing type three-wheeled bicycle as described above, the front frame is configured to be tiltable by a maximum inclination angle from the vertical neutral position to the left and right sides with respect to the rear frame, and the inclination angle of the front frame is set to the maximum inclination. A stopper for regulating the angle is provided (see Patent Document 1 below).

  That is, as shown in FIG. 13, the front frame 102 of the three-wheeled bicycle 101 has a main frame 103 extending rearward. The rear frame 104 is provided with a rotation shaft 106 that is rotatable around an axial center 105 in the front-rear direction. The main frame 103 of the front frame 102 is swingable on a circumferential track 107 centered on the axis 105 of the rotation shaft 106, and brackets (not shown) are provided at both front and rear ends of the rotation shaft 106. It is connected through. As a result, the front frame 102 can swing left and right with respect to the rear frame 104 about the rotation shaft 106.

  The rear frame 104 is provided with a pair of left and right stoppers 108a and 108b. Of these, the left stopper 108a restricts the inclination angle of the front frame 102 to the left side with respect to the rear frame 104 to the maximum inclination angle A, and the right stopper 108b is the inclination angle of the front frame 102 to the right side with respect to the rear frame 104. Is regulated to the maximum inclination angle A.

According to this, for example, as shown by the phantom line in FIG. 13, when the front frame 102 swings to the left side from the vertical neutral position N with respect to the rear frame 104, the main frame 103 moves to the rotation shaft 106. When the front frame 102 reaches the maximum inclination angle A, the main frame 103 comes into contact with the left stopper 108a. As a result, the tilt angle to the left of the front frame 102 is regulated to the maximum tilt angle A, and the front frame 102 does not tilt to the left beyond the maximum tilt angle A. The same applies to the case where the front frame 102 is tilted to the right from the vertical neutral position with respect to the rear frame 104.
JP-A-9-156563

  Generally, the three-wheeled bicycle 101 is traveled at a low speed. When the vehicle is turning at a low speed, if the occupant is unfamiliar with the driving of the three-wheeled bicycle 101, the front frame 102 is moved with respect to the rear frame 104. There is a problem that the tilt is excessive and the balance is easily lost.

  As a countermeasure, it may be possible to fix the front frame 102 to the vertical neutral position N so that the front frame 102 does not swing left and right with respect to the rear frame 104. However, in this case, the three-wheeled bicycle 101 is smoothly turned. There is a problem that the effect that it is possible is impaired.

  Further, since the left and right pairs of the stoppers 108a and 108b are provided, the number of parts increases, and there is another problem that the mounting space necessary for mounting both the stoppers 108a and 108b is increased to the left and right.

  The present invention provides a three-wheeled bicycle that can prevent a passenger unfamiliar with driving from excessively tilting the front frame during turning, can turn smoothly, and can be reduced in size by reducing the number of parts. The purpose is to do.

To achieve the above object, according to the first aspect of the present invention, the front frame has a front frame that supports the front wheel and the seat, and a rear frame that supports the rear two wheels. It is a tricycle that can swing from the left to the right and left to the maximum tilt angle,
A swing restricting member for restricting the tilt angle of the front frame, and an inclination angle switching means for switching the tilt angle restricted by the swing restricting member;
The tilt angle switching means sets the tilt angle of the front frame regulated by the swing regulating member to any one of the maximum tilt angle and an intermediate tilt angle between the vertical neutral position and the maximum tilt angle. Selectively switching ,
The front frame has a main frame extending backwards,
The swing regulating member has a regulating surface that regulates the inclination angle of the front frame by contacting the main frame.
The tilt angle switching means selectively switches the tilt angle of the front frame to one of the maximum tilt angle and the intermediate tilt angle by changing the position of the restriction surface with respect to the main frame,
The rear frame is provided with a pivot shaft that can pivot around the longitudinal axis.
The main frame is connected to the rotation shaft at a predetermined interval in the radial direction of the circumferential track around the axis of the rotation shaft, and is swingable on the circumferential track.
The swing restricting member is provided on the rear frame and is disposed between the main frame and the rotation shaft, and the inclination angle switching means changes the mounting position of the swing restricting member in the radial direction of the circumferential track. It has a mounting position changing function .

  According to this, when the tilt angle of the front frame regulated by the swing regulating member is switched to the maximum tilt angle by the tilt angle switching means, the front frame has a maximum tilt angle on both the left and right sides with respect to the rear frame. It can tilt and swing.

  Further, when the tilt angle of the front frame regulated by the swing regulating member is switched to the intermediate tilt angle by the tilt angle switching means, the front frame tilts to the left and right sides to the intermediate tilt angle with respect to the rear frame. Can be swung. Thereby, the inclination angle of the front frame with respect to the rear frame can be switched from the maximum inclination angle to an intermediate inclination angle smaller than the maximum inclination angle.

  Therefore, when an occupant unfamiliar with driving a three-wheeled bicycle, first, by changing the inclination angle of the front frame to the intermediate inclination angle as described above, the front frame is compared to the rear frame during turning. Because it tilts only to an intermediate tilt angle smaller than the maximum tilt angle, it can prevent the front frame from tilting excessively, making it easy to maintain the balance of the three-wheeled bicycle and smoothly turning the three-wheeled bicycle Can do.

  In this way, when the occupant is fully accustomed to the tricycle that has been switched so that the inclination angle of the front frame is regulated to the intermediate inclination angle, then the inclination angle of the front frame is restricted to the maximum inclination angle. Switch as expected. Thereby, the occupant can get used to the three-wheeled bicycle in which the inclination angle of the front frame is regulated to the maximum inclination angle step by step without difficulty.

Further, when the front frame swings left and right with respect to the rear frame and the main frame of the front frame comes into contact with the restriction surface of the swing restriction member, the swing of the front frame is restricted.
By changing the position of the restricting surface of the swing restricting member by the inclination angle switching means, the contact position where the main frame abuts on the restricting surface changes, so that the inclination angle of the front frame becomes the maximum inclination angle and the intermediate inclination. It is selectively switched to either the angle or the angle.
Further, when the front frame swings left and right with respect to the rear frame, the main frame of the front frame swings on the circumferential track around the rotation axis. When the main frame comes into contact with the regulation surface of the rocking restriction member, the main frame is prevented from rocking and the front frame is restricted from swinging.
Further, by changing the mounting position of the swing regulating member in the radial direction of the circumferential track by the tilt angle switching means, the position of the regulating surface of the swing regulating member is displaced in the radial direction of the circumferential track. The abutting position where the main frame abuts on the regulating surface is changed, whereby the inclination angle of the front frame is selectively switched between the maximum inclination angle and the intermediate inclination angle.

In the second aspect of the invention, one swing restricting member includes both a right restricting surface that restricts the right tilt angle of the front frame and a left restricting surface that restricts the left tilt angle of the front frame. Is.

  According to this, when the front frame swings to the right with respect to the rear frame and the main frame of the front frame comes into contact with the right restricting surface of the swing restricting member, the swinging of the front frame to the right is restricted. Is done. Further, when the front frame swings to the left with respect to the rear frame and the main frame of the front frame comes into contact with the left restricting surface of the swing restricting member, the swing of the front frame to the left is restricted. .

  Also, since one swing regulating member has both the right regulating surface and the left regulating surface, one swing regulating member can regulate the tilt angles on both the left and right sides of the front frame. The number of parts is reduced, and the mounting space necessary for mounting the swing restricting member is reduced, and the size can be reduced.

In the third aspect of the invention, the swing restricting member is attached to an attachment member provided on the rear frame, and the inclination angle switching means is an attachment position changing member that is detachably inserted between the swing restricting member and the attachment member. Yes, by inserting the mounting position changing member between the swing restricting member and the mounting member, the distance between the restricting surface of the swing restricting member and the main frame in the radial direction of the circumferential track is reduced, and the mounting position is changed. By removing the member from between the swing restricting member and the mounting member, the distance between the restricting surface of the swing restricting member and the main frame in the radial direction of the circumferential track is increased.

  According to this, when the mounting position changing member is removed from between the swing restricting member and the mounting member, the interval between the restricting surface of the swing restricting member in the radial direction of the circumferential track and the main frame is increased. The swing range in which the main frame swings on the circumferential track until the main frame comes into contact with the regulating surface is expanded. Thereby, the inclination angle of the front frame is switched to the maximum inclination angle.

  Further, when the mounting position changing member is inserted between the swing restricting member and the mounting member, the distance between the restricting surface of the swing restricting member and the main frame in the radial direction of the circumferential track is reduced. The swing range that swings on the circumferential track is reduced until it comes into contact with the regulating surface. Thereby, the inclination angle of the front frame is switched to an intermediate inclination angle smaller than the maximum inclination angle.

In the fourth invention, the swing restricting member and the mounting position changing member are fastened to the mounting member by a common fastening member, and the mounting position changing member is attached and detached by operating the fastening member, and is mounted on the rear frame. A scissors are attached, and an operation opening for operating the fastening member from the inside of the scissors is formed at the bottom of the scissors.

  According to this, by operating the fastening member through the operation opening while the scissors are mounted on the rear frame, the mounting position changing member can be moved between the swing regulating member and the mounting member without removing the scissors from the rear frame. The mounting position changing member can be inserted and inserted between the swinging restricting member and the mounting member. Thereby, when the inclination angle of the front frame is switched to any one of the maximum inclination angle and the intermediate inclination angle, it is not necessary to remove the bag from the rear frame each time, and the inclination angle can be easily switched.

  As described above, according to the present invention, the inclination angle of the front frame when the front frame swings left and right with respect to the rear frame can be selectively switched between the maximum inclination angle and the intermediate inclination angle. Therefore, by restricting the tilt angle of the front frame to an intermediate tilt angle, it is possible to prevent an unaccustomed driver from tilting the front frame excessively when turning, and to smoothly turn a three-wheeled bicycle. Can be made.

  In this way, when the occupant is fully accustomed to the tricycle that has been switched so that the inclination angle of the front frame is regulated to the intermediate inclination angle, then the inclination angle of the front frame is restricted to the maximum inclination angle. Switch as expected. As a result, the occupant can comfortably get used to the three-wheeled bicycle in which the inclination angle of the front frame is regulated to the maximum inclination angle.

  In addition, since one swing restricting member is provided with both the right restricting surface and the left restricting surface, the number of parts is reduced, the mounting space required for mounting the swing restricting member is reduced, and the size is reduced. Can be planned.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 1 denotes a three-wheel bicycle, and the body frame 2 is divided into a front frame 3 and a rear frame 4. The front frame 3 is provided with a front wheel 5, a seat 6, a handle 7, a front sprocket 9 that is rotated by a pedal 8, and the like. The front frame 3 has a round pipe-shaped main frame 10 extending horizontally rearward.

  As shown in FIG. 2, the rear frame 4 includes a pair of left and right outer side frame members 4 a that are long in the front-rear direction, a pair of left and right inner side frame members 4 b that are disposed inside both the outer side frame members 4 a, and each side frame. Provided between the front horizontal frame material 4c provided at the front ends of the materials 4a and 4b, the rear horizontal frame material 4d provided at the rear ends of the side frame materials 4a and 4b, and the inner side frame materials 4b. And a pair of front and rear intermediate frame frames 4e.

  The rear frame 4 is provided with a pair of left and right rear wheels 12a and 12b, a rear sprocket 13 interlocking with the axle of one of the rear wheels 12b, and a flange 14. A chain 15 is wound between the front sprocket 9 and the rear sprocket 13 so that the rotational force applied to the pedal 8 is transmitted to one rear wheel 12b via the chain 15. Yes.

  As shown in FIG. 3, the front frame 3 is swingable relative to the rear frame 4 from the vertical neutral position N to the left and right sides to the maximum inclination angle A. Such a swing mechanism 16 is configured as follows.

  That is, as shown in FIG. 2 and FIG. 4, a round bearing pipe 17 having both front and rear ends opened is provided below the rear frame 4. The bearing pipe 17 is attached to the rear frame 4 through a pair of front and rear brackets 18 and 19 suspended from the intermediate horizontal frame member 4e. The bearing pipe 17 is inserted with a rotating shaft 21 that is rotatable around an axial center 20 in the front-rear direction. The rotating shaft 21 is rotatably held by bearings 22 and 23 provided at both front and rear ends of the bearing pipe 17 so as to be positioned directly below the main frame 10 of the front frame 3 in the vertical neutral position N. Is provided. Note that both front and rear ends of the rotating shaft 21 protrude forward and rearward from the bearings 22 and 23, respectively.

  The main frame 10 is connected to the front and rear ends of the rotary shaft 21 with a pair of front and rear brackets 25 and 26 at a predetermined distance D in the radial direction of the circumferential track 24 centered on the axis 20 of the rotary shaft 21. It is swingable left and right on the circumferential track 24. By such a swing mechanism 16, the front frame 3 swings to the left and right sides with respect to the rear frame 4 about the rotation shaft 21.

  As shown in FIGS. 2 to 4, the swing mechanism 16 is provided with a swing restoring device 29 that biases the front frame 3 to the vertical neutral position N. As shown in FIGS. 7 and 8, the swing restoring device 29 includes a pair of left and right restoring levers 30 and 31 crossing the X shape, and a tension coil spring 32 provided between the lower ends of the restoring levers 30 and 31. And a lever stopper member 33.

  As shown in FIGS. 4 and 8, both the restoring levers 30 and 31 are fitted on the outer side of the rear bearing 23, and can swing around the shaft center 20. The lower end of one restoring lever 30 is located on the lower right side of the axis 20, and the upper end is located on the left side of the main frame 10. Further, the lower end of the other restoring lever 31 is located on the lower left side of the axis 20, and the upper end is located on the right side of the main frame 10. The lower ends of the restoring levers 30 and 31 are pulled toward each other by the tension coil springs 32, so that the main frame 10 is lifted from both the left and right sides as shown by the solid lines in FIG. It is sandwiched between parts.

  The lever stopper member 33 is located below the rotating shaft 21 and is provided at the lower end portion of the bracket 34 suspended from the bearing pipe 17 as shown in FIG. The lever stopper member 33 allows swinging in the direction in which the lower ends of the restoring levers 30 and 31 are separated from each other, and prevents swinging in the direction in which the lower ends are approached.

  As shown in FIGS. 5, 6, and 9 to 11, the rear frame 4 includes a swing restriction member 38 that restricts the inclination angle of the front frame 3 with respect to the rear frame 4, and is restricted by the swing restriction member 38. A pair of left and right attachment position changing members 39 (an example of an inclination angle switching means) for switching the inclination angle is provided.

  The swing restricting member 38 includes a thin flat base plate 40 and a damper member 41 provided on the base plate 40. The damper member 41 is made of an elastic body such as rubber. In the left and right central portions of the upper surface of the damper member 41, concave portions 42 that are recessed in an arc shape are formed. Further, on the upper surface of the damper member 41, there are a right restricting surface 43 for restricting the right inclination angle of the front frame 3 and a left restricting surface 44 for restricting the left inclination angle of the front frame 3 on both sides of the recess 42. Is formed.

  A pair of left and right mounting members 46 are provided between the front and rear of both intermediate frame frames 4e of the rear frame 4. The swing restricting member 38 is fastened to the mounting member 46 by a pair of left and right hexagon socket bolts 47 (an example of a fastening member), and is disposed between the main frame 10 and the rotating shaft 21. In addition, bolt holes 48 into which the hexagon socket head bolts 47 are inserted are formed at both left and right ends of the base plate 40 of the swing restricting member 38.

  The mounting position changing member 39 is regulated by the rocking regulating member 38 by changing the mounting position of the rocking regulating member 38 in the radial direction of the circumferential track 24 (vertical direction in FIGS. 5 and 6). The inclination angle of the front frame 3 is selectively switched to any one of the maximum inclination angle A and an intermediate inclination angle B between the vertical neutral position N and the maximum inclination angle A.

  Each of the attachment position changing members 39 is an L-shaped member having a flat plate-like insertion plate portion 51 and an operation plate portion 52 that is bent upward at a right angle from one end of the insertion plate portion 51. The insertion plate 51 is formed with a notch 53 for a bolt that is open to the other end. Accordingly, the hexagon socket head cap bolt 47 can be inserted into and removed from the left and right lateral direction with respect to the cutout portion 53. Further, the insertion plate portion 51 of the mounting position changing member 39 can be detachably inserted from the left and right lateral directions between the swing regulating member 38 and the mounting member 46, and swings by the hexagon socket head bolt 47. It is fastened to the mounting member 46 together with the regulating member 38.

  Further, the flange 14 provided on the rear frame 4 is positioned above the swing restricting member 38, and the hexagonal socket bolt 47 for rotating the hexagonal socket bolt 47 from the inside of the flange 14 is operated on the bottom portion 14 a of the flange 14. Two left and right operation openings 54 are formed.

  Further, the three-wheeled bicycle 1 is provided with a fixing device 57 that fixes the front frame 3 to the vertical neutral position N with respect to the rear frame 4. As shown in FIG. 12, the fixing device 57 includes a front frame side connecting piece 58 provided on the main frame 10, and rear frame side connecting pieces 59a and 59b provided on the pair of left and right inner side frame members 4b. One fixing lever 60a connected between the left and right end portions of the front frame side connecting piece 58 and one of the left and right rear frame side connecting pieces 59a; The other fixing lever 60b is connected to the rear frame side connecting piece 59b. Both fixing levers 60a and 60b are detachably fastened by hexagon socket bolts 61, respectively.

  As shown in FIG. 3, the intermediate inclination angle B may be set to any angle between the vertical neutral position N (inclination angle = 0 °) and the maximum inclination angle A. For example, the maximum inclination angle A may be set to 25 °, the intermediate inclination angle B may be set to 10 °, or any other angle may be set.

Hereinafter, the operation of the above configuration will be described.
The tricycle 1 has the following three types of switching functions.
(1) A fixed switching function for fixing the front frame 3 to the vertical neutral position N with respect to the rear frame 4.
(2) A maximum tilt angle switching function for releasing the fixing function so that the front frame 3 can swing with respect to the rear frame 4 and switching the tilt angle of the front frame 3 at this time to the maximum tilt angle A.
(3) An intermediate tilt angle switching function for releasing the fixing function so that the front frame 3 can swing with respect to the rear frame 4 and switching the tilt angle of the front frame 3 to the intermediate tilt angle B.

Hereinafter, the switching functions (1) to (3) will be described.
(1) Fixed switching function As shown in FIG. 12, one fixing lever 60a is connected between the front frame side connecting piece 58 and one rear frame side connecting piece 59a by using a hexagon socket bolt 61. The other fixing lever 60b is connected between the front frame side connecting piece 58 and the other rear frame side connecting piece 59b. As a result, the front frame 3 is fixed to the vertical neutral position N with respect to the rear frame 4, and the front frame 3 is prevented from swinging left and right.
(2) Maximum Inclination Angle Switching Function As shown in FIG. 5, both the fixing levers 60 a and 60 b are removed, and the fixing of the front frame 3 to the rear frame 4 is released. As a result, the front frame 3 can swing left and right with respect to the rear frame 4.

  Then, both the hexagon socket head cap bolts 47 are loosened using a tightening tool such as a hexagon wrench, and the two attachment position changing members 39 are placed between the swing restricting member 38 and the attachment member 46 as shown by phantom lines in FIG. Then, the hexagon socket head cap bolt 47 is tightened using the tightening tool.

  As a result, as shown in FIG. 5, the swing restricting member 38 is mounted on the mounting member 46, and the position of the swing restricting member 38 is removed by the thickness of the insertion plate portion 51 of the mounting position changing member 39. The distance S between the restricting surfaces 43 and 44 of the swing restricting member 38 in the radial direction of the circumferential track 24 and the main frame 10 at the vertical neutral position N increases.

  Therefore, for example, when the front frame 3 swings to the left side from the vertical neutral position N with respect to the rear frame 4, as shown by the solid line in FIG. When the main frame 10 swings left on the circumferential track 24 and the main frame 10 abuts on the left restricting surface 44 of the swing restricting member 38, the front frame 3 swings further to the left. Be regulated. At this time, the swing range in which the main frame 10 swings on the circumferential track 24 from the vertical neutral position N until it contacts the left regulation surface 44 is expanded as compared with the case (3) below.

  Similarly, when the front frame 3 swings to the right, the rotating shaft 21 rotates to the right and the main frame 10 of the front frame 3 swings to the right on the circumferential track 24, so that the main frame 10 Is in contact with the right restricting surface 43 of the swing restricting member 38, so that the front frame 3 is restrained from further swinging to the right. At this time, the swing range in which the main frame 10 swings on the circumferential track 24 from the vertical neutral position N to the right-side regulating surface 43 is expanded as compared with the case (3) below.

As a result, as shown in FIG. 3, the left and right inclination angles of the front frame 3 restricted by the swing restriction member 38 are respectively switched to the maximum inclination angle A, and the front frame 3 It can be swung on both sides by tilting to the maximum tilt angle A.
(3) Intermediate tilt angle switching function As shown in FIG. 6, both the fixing levers 60 a and 60 b are removed, and the fixing of the front frame 3 to the rear frame 4 is released. As a result, the front frame 3 can swing left and right with respect to the rear frame 4.

  Then, both hexagon socket head bolts 47 are loosened by using a tightening tool such as a hexagon wrench, and the swing restricting member 38 is lifted from the mounting member 46, and the both mounting position changing members 39 are inserted as shown by the solid line in FIG. The plate portion 51 is inserted between the swing restricting member 38 and the mounting member 46 from the left and right lateral directions, and then the hexagon socket head cap bolts 47 are tightened using the tightening tool.

  Accordingly, as shown in FIG. 6, the swing restricting member 38 is mounted on the mounting member 46 together with the mounting position changing member 39, and the position of the swing restricting member 38 is the thickness of the insertion plate portion 51 of the mounting position changing member 39. The distance S between the regulating surfaces 43 and 44 of the swing regulating member 38 in the radial direction of the circumferential track 24 and the main frame 10 at the vertical neutral position N is reduced.

  Therefore, for example, when the front frame 3 swings from the vertical neutral position N to the left side with respect to the rear frame 4, the main frame 10 has a left restricting surface 44 of the swing restricting member 38 as shown by a solid line in FIG. 6. The front frame 3 is restricted from swinging further to the left by the contact. At this time, the swing range in which the main frame 10 swings on the circumferential track 24 from the vertical neutral position N to contact with the left regulation surface 44 is reduced as compared with the case (2).

  Similarly, when the front frame 3 swings to the right, the front frame 3 swings further to the right by the main frame 10 coming into contact with the right restriction surface 43 of the swing restriction member 38. Be regulated. At this time, the swing range in which the main frame 10 swings on the circumferential track 24 from the vertical neutral position N to the right-side regulating surface 43 is reduced as compared with the case (2).

As a result, as shown in FIG. 3, the left and right inclination angles of the front frame 3 restricted by the rocking restriction member 38 are respectively switched to the intermediate inclination angle B. It can be swung on both sides by being inclined to an intermediate inclination angle B.
Next, an example of how to use the three-wheeled bicycle 1 having the switching functions (1) to (3) will be described.

  When an occupant unfamiliar with driving the three-wheeled bicycle 1 may cause the front frame 3 to be excessively tilted with respect to the rear frame 4 and lose the balance, as described in the above (1) fixed switching function, the rear frame 4, the front frame 3 is fixed at a vertical neutral position N to prevent the front frame 3 from swinging left and right. This eliminates the possibility that the front frame 3 is excessively inclined and loses balance.

  Then, when the user gets used to driving with the front frame 3 fixed at the vertical neutral position N as described above, as described in the above (3) intermediate tilt angle switching function, the swing restricting member 38 is used. The left and right inclination angles of the front frame 3 regulated by the above are switched to the intermediate inclination angle B, respectively.

  As a result, the front frame 3 tilts only to an intermediate tilt angle B smaller than the maximum tilt angle A with respect to the rear frame 4 during cornering, thereby preventing the front frame 3 from tilting excessively. Therefore, even an inexperienced passenger can easily maintain the balance of the three-wheeled bicycle 1 and can smoothly turn the three-wheeled bicycle 1.

  In this way, when the occupant is sufficiently familiar with the three-wheeled bicycle 1 switched so that the inclination angle of the front frame 3 is regulated to the intermediate inclination angle B, the above (2) maximum inclination angle switching is performed. As described in the function, the left and right inclination angles of the front frame 3 restricted by the rocking restriction member 38 are switched to the maximum inclination angle A, respectively. Thereby, the passenger can get used to the three-wheeled bicycle 1 in which the inclination angle of the front frame 3 is regulated to the maximum inclination angle A without difficulty.

  Further, in the above cases (2) and (3), as shown in FIG. 11, a fastening tool such as a hexagon wrench is inserted into the operation opening 54 from the inside of the flange 14 with the flange 14 attached to the rear frame 4. Since the hexagon socket head cap bolt 47 can be inserted and turned, the attachment position changing member 39 can be attached and detached without removing the collar 14 from the rear frame 4. Thereby, when the inclination angle of the front frame 3 restricted by the rocking restriction member 38 is switched to any one of the maximum inclination angle A and the intermediate inclination angle B, it is necessary to remove the bag 14 from the rear frame 4 each time. No, it is easy to change the tilt angle.

  Further, when attaching / detaching the attachment position changing member 39, the attachment position changing member 39 is attached / detached by holding the operation plate portion 52 with the fingertips from the left and right outer sides of the rear frame 4 and moving the attachment position changing member 39 horizontally. Work can be done easily.

  In addition, since one swing restricting member 38 includes both the right restricting surface 43 and the left restricting surface 44, the single swing restricting member 38 restricts the tilt angles on the left and right sides of the front frame 3. Therefore, the number of parts is reduced, the mounting space necessary for mounting the swing restricting member 38 is reduced, and the size can be reduced.

  Further, in the above cases (2) and (3), when the front frame 3 swings to the left from the vertical neutral position N with respect to the rear frame 4, as shown by the phantom line in FIG. Swing to the left on the circumferential track 24, one restoring lever 30 is pushed by the main frame 10 and swung in the same direction as the main frame 10 about the axis 20, and the lower end of one restoring lever 30 Is separated from the lower end of the other restoring lever 31 to the right side, and the tension coil spring 32 is stretched. The tension force of the tension coil spring 32 is applied to the main frame 10 via the one restoring lever 30 as a restoring force. Acting to the right (opposite to the swinging direction). As a result, the front frame 3 swinging to the left can be easily restored to the vertical neutral position N.

  Similarly, when the front frame 3 swings to the right from the vertical neutral position N with respect to the rear frame 4, the main frame 10 swings to the right on the circumferential track 24, and the other restoring lever 31 is It is pushed by the main frame 10 and swings around the axis 20 in the same direction as the main frame 10, and the lower end portion of the other restoring lever 31 is separated from the lower end portion of the one restoring lever 30 to the left side and is a tension coil spring 32 is stretched, and the tensile force of the tension coil spring 32 acts on the main frame 10 from the right side to the left (opposite to the swinging direction) as a restoring force via the other restoring lever 31. Thereby, the front frame 3 swinging to the right side can be easily restored to the vertical neutral position N.

In the above-described embodiment, the three-wheeled bicycle 1 that does not include auxiliary power has been described. However, an electric three-wheeled bicycle that includes auxiliary power such as a motor may be used.
In the above embodiment, as shown in FIG. 12, the front frame 3 is fixed using a pair of left and right fixing levers 60a and 60b, but may be fixed using only one of the levers.

In the above embodiment, as shown in FIG. 10, the attachment position changing member 39 is configured to be detachable from the left and right lateral directions, but may be configured to be detachable from the front or rear.
In the above embodiment, the front frame 3 is switched to two types of inclination angles, the maximum inclination angle A and the intermediate inclination angle B, but between the insertion plate portion 51 of the attachment position changing member 39 and the attachment member 46 or It is also possible to insert another plate-like attachment position changing member between the insertion plate portion 51 and the swing restricting member 38 so as to be switched to three or more kinds of inclination angles.

  In addition, a plurality of types of attachment position changing members 39 with different thicknesses of the insertion plate portion 51 are manufactured, and the intermediate inclination angle B is set according to various conditions such as passenger preference, physique or size of the three-wheeled bicycle 1. It is also possible to change the value. For example, when the attachment position changing member 39 having a thick plate thickness of the insertion plate portion 51 is attached, the intermediate inclination angle B becomes a small value, and when the attachment position changing member 39 having a thin plate thickness of the insertion plate portion 51 is attached, The inclination angle B is a large value.

  The present invention is very useful for a person unfamiliar with driving a swing type three-wheeled bicycle, and can get used to driving a three-wheeled bicycle step by step without difficulty.

Side view of a tricycle according to an embodiment of the present invention Top view of the rear frame of the tricycle XX arrow view in FIG. YY arrow view in FIG. Sectional drawing which shows the positional relationship of the rocking | fluctuation control member and main frame when the inclination angle of the front frame with respect to the rear frame of a three-wheeled bicycle is restricted to the maximum inclination angle. Sectional drawing which shows the positional relationship of the rocking | fluctuation control member and main frame at the time of restricting the inclination angle of the front frame with respect to the rear frame of the three-wheel bicycle to the intermediate inclination angle The perspective view of the swing restoration device of the tricycle Schematic showing the movement of the three-wheel bicycle swing restoration device The perspective view at the time of removing the rocking | fluctuation control member and attachment position change member of a tricycle A plan view of the three-wheeled bicycle with the swing restricting member and the mounting position changing member mounted thereon XX arrow view in FIG. The same figure of the fixing device of the tricycle Sectional view from the rear of a conventional tricycle

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Three-wheel bicycle 3 Front frame 4 Rear frame 5 Front wheel 6 Seat 10 Main frame 12a, 12b Rear wheel 14 籠 14a Bottom part 20 Axis center 21 Rotating shaft 24 Circumferential track 38 Swing regulation member 39 Mounting position change member (inclination angle switching) means)
43, 44 Restricting surface 46 Mounting member 47 Hexagon socket head cap screw (fastening member)
54 Opening A for Operation A Maximum Inclination Angle B Intermediate Inclination Angle D Predetermined Spacing N Vertical Neutral Position S Spacing

Claims (4)

A three-wheeler having a front frame that supports a front wheel and a seat, and a rear frame that supports two rear wheels, wherein the front frame is swingable with respect to the rear frame from a vertical neutral position to the left and right sides to a maximum inclination angle A bicycle,
A swing restricting member for restricting the tilt angle of the front frame, and an inclination angle switching means for switching the tilt angle restricted by the swing restricting member;
The tilt angle switching means sets the tilt angle of the front frame regulated by the swing regulating member to any one of the maximum tilt angle and an intermediate tilt angle between the vertical neutral position and the maximum tilt angle. Selectively switching ,
The front frame has a main frame extending backwards,
The swing regulating member has a regulating surface that regulates the inclination angle of the front frame by contacting the main frame.
The tilt angle switching means selectively switches the tilt angle of the front frame to one of the maximum tilt angle and the intermediate tilt angle by changing the position of the restriction surface with respect to the main frame,
The rear frame is provided with a pivot shaft that can pivot around the longitudinal axis.
The main frame is connected to the rotation shaft at a predetermined interval in the radial direction of the circumferential track around the axis of the rotation shaft, and is swingable on the circumferential track.
The swing restricting member is provided on the rear frame and is disposed between the main frame and the rotation shaft, and the inclination angle switching means changes the mounting position of the swing restricting member in the radial direction of the circumferential track. A three-wheeled bicycle having a mounting position changing function . The swing control member is provided with both a right-side restricting surface that restricts the right-side inclination angle of the front frame and a left-side restricting surface that restricts the left-side inclination angle of the front frame. Item 3. A three-wheeled bicycle according to item 1 . The swing regulating member is attached to an attachment member provided on the rear frame,
The inclination angle switching means is an attachment position changing member that is detachably inserted between the swing regulating member and the attachment member,
By inserting the mounting position changing member between the swing restricting member and the mounting member, the interval between the restricting surface of the swing restricting member and the main frame in the radial direction of the circumferential track is reduced,
By removing the mounting position changing member from between the swing restricting member and the mounting member, the distance between the restricting surface of the swing restricting member and the main frame in the radial direction of the circumferential track is increased. The tricycle according to claim 1 or 2 . The swing restricting member and the mounting position changing member are fastened to the mounting member by a common fastening member,
By operating the fastening member, the attachment position changing member is attached and detached,
A hook is attached on the rear frame,
The three-wheeled bicycle according to claim 3, wherein an operation opening for operating the fastening member from the inside of the bag is formed at the bottom of the bag .

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