JP5745677B1 - Frame body of motorcycle with side car - Google Patents

Abstract

A frame body of a two-wheeled vehicle with a side vehicle that reduces deterioration in riding comfort due to road surface conditions is provided with a simple configuration. A frame body 23 of a two-wheeled vehicle 1 with a side vehicle includes a side frame body 29 that supports a wheel shaft 17 of a side wheel 9 and a main frame body 31 that supports a rear wheel shaft 19. The stopper 33 is provided between the side frame body 29 and the main frame body 31. The side frame body 29 is fixed to the head pipe 27, and the main frame body 31 is connected to the head pipe 27 so as to be rotatable around a horizontal axis 51 orthogonal to the traveling direction F. As a result, the main frame body 31 rotates relative to the side frame body 29. The stopper 33 limits the rotation range of the main frame body 31. [Selection] Figure 1

Description

  The present invention relates to a frame body that is used in a vehicle such as a bicycle or an automobile that is provided with a side wheel on one side of a two-wheeled vehicle and travels on three wheels of a front wheel, a rear wheel, and a side wheel.

  2. Description of the Related Art Conventionally, there is known a two-wheeled bicycle with a side vehicle (for example, Patent Document 1) in which a side wheel of one wheel is attached to the side of a two-wheeled vehicle having a front wheel and a rear wheel, and the vehicle travels with three wheels. Since the vehicle body is supported by three wheels, the two-wheeled bicycle with a side vehicle is excellent in stability when traveling straight on a paved flat land. However, since each wheel is attached to the vehicle body with the relative positional relationship of the wheel shafts fixed to each other, when traveling across an inclined surface, the vehicle body is inclined with the inclination, The riding posture becomes unstable. In addition, the smooth cornering performed by tilting the vehicle body portion toward the side wheels could not be performed. For this reason, it was not possible to obtain a riding comfort like a general bicycle.

  A tricycle developed for such a problem is described in Patent Document 2. This three-wheeled bicycle includes a pair of rear wheels whose wheel shafts are coaxially provided, and a frame body connected to the pair of rear wheels so as to be able to swing left and right in the traveling direction. When traveling across an inclined surface, the frame body stands in a vertical direction with respect to the inclined surface. For this reason, the occupant can perform pedaling in a normal riding posture. It is also possible to perform cornering by tilting the frame body.

  However, the structure of the drive device provided between the swingable frame body and the rear wheel is complicated, which causes the weight of the vehicle body and the cost of the product to increase. In addition, since the wheel shafts of the pair of rear wheels are always supported so as to be coaxially located, when traveling on an unpaved uneven road, if one of the rear wheels bounces, the other Bouncing. For this reason, there is a problem that the rear part of the vehicle body part is shaken and the stability during driving and the ride comfort are impaired.

Japanese Utility Model Publication No. 57-77075 JP 2006-168503 A

  It is an object of the present invention to provide a frame body of a two-wheeled vehicle with a side vehicle that reduces deterioration in riding comfort due to road surface conditions with a simple configuration.

(1) The present invention is a frame body of a two-wheeled vehicle with a side vehicle having a side wheel on one side of a two-wheeled vehicle including a front wheel and a rear wheel,
A head pipe, a side frame body that extends from the head pipe toward the side wheel and on which the wheel shaft of the side wheel is supported, and is rotatable about an axis parallel to the wheel axis of the rear wheel. It has a connecting part connected to the head pipe or the side frame body, the wheel axle of the rear wheel is pivotally supported, and the main frame body that supports the occupant and the rotation range of the main frame body are limited. And a stopper.
(2) Further, the present invention is characterized in that the side frame body is disposed on the right side in the traveling direction with respect to the center plane of the main frame body.
(3) Furthermore, the present invention is characterized in that the side frame body includes a main body portion to which the side wheels are attached, and a connected portion that is detachably connected to the main body portion.
(4) Furthermore, a support portion is provided between the main frame body and the head pipe when the main body portion of the side frame body is removed, and restricts the rotation of the main frame body. It is characterized by that.

The present invention has the following effects as long as the rotation of the main frame body is not limited by the stopper.
For example, during upright running, when the side wheel gets over a convex obstacle on the running surface, the rear side of the side frame body is lifted together with the side wheel, and the head pipe tilts forward. With respect to the movement of the side frame body and the head pipe, the main frame body rotates relative to the side frame body around the connecting portion, and thus is not affected by the obstacle. Thus, this frame body does not transmit the impact of the side frame body received from the obstacle to the main frame body side, and acts like a suspension, so that the ride comfort is not impaired.

  Then, as the main frame body rotates with respect to the side frame body, the rear wheels and the side wheels move up and down independently of each other. And can travel stably.

  When traveling across the inclined surface, the rear wheel moves to a high position or a low position with respect to the side wheel according to the height of the inclination, so that the main frame body stands in the vertical direction without being inclined. Therefore, the occupant can maintain a normal riding posture. In cornering on flat ground, the main frame body can be tilted left and right, so that smooth cornering like a general two-wheeled vehicle is possible. Further, since no twist is generated between the main frame body and the rear wheel, the driving device also has a simple configuration.

Moreover, this invention has the following effect by providing a stopper.
When the main frame body is inclined to the side frame body side, the main frame body rotates around the connection portion with the head pipe. When the main frame body is further tilted, the stopper acts to limit the rotation range of the main frame body. At this time, a part of the occupant's load is transmitted more to the side frame body, and stable traveling is possible with the occupant being supported by the three wheels of the front wheel, the rear wheel, and the side wheel in a balanced manner. Therefore, the two-wheeled vehicle with a side vehicle provided with this frame body is suitable for an elderly person with a weak sense of balance.

The side view of a two-wheeled bicycle with a side car. The top view of a two-wheeled bicycle with a side car. The top view which shows other embodiment of a side frame body. The partial top view of a side frame body. The partial sectional view of a side frame body, and the sectional view of a standing pipe.

  The embodiment of the present invention will be described using a two-wheeled bicycle with a side vehicle as an example. In addition, the same code | symbol shown over each figure shows the same or the same thing.

  As shown in FIGS. 1 and 2, the two-wheel bicycle with a side vehicle 1 has a front wheel 5, a rear wheel 7, a side wheel 9, a steering device 11, a seat device 13, and a drive device 15 attached to the vehicle body portion 3. It is a configuration. The front wheel 5 and the rear wheel 7 are arranged in a straight line before and after each other, and the side wheel 9 is arranged on one side of the rear wheel 7. The side wheel 9 preferably has a smaller diameter than the rear wheel 7, and the wheel shaft 17 of the side wheel 9 is located substantially directly below the extension line of the wheel shaft 19 of the rear wheel 7 (hereinafter referred to as the rear wheel shaft 19). Is preferably provided.

  The vehicle body 3 includes a front fork 21 and a frame body 23 according to the present embodiment. A wheel shaft 25 (hereinafter referred to as a front wheel shaft 25) of the front wheel 5 is pivotally supported by a front fork claw (not shown), and the steering device 11 is connected to a fork stem (not shown). The frame body 23 includes a head pipe 27 that rotatably supports the fork stem via a head component (not shown), a side frame body 29, a main frame body 31, and a stopper 33.

  The side frame body 29 is fixed to the side wall of the head pipe 27 and extends toward the wheel shaft 17 of the side wheel 9 and supports the wheel shaft 17 of the side wheel 9. The side frame body 29 includes a side pipe 35 and a side wheel shaft support portion 37, and is made of a metal such as an aluminum alloy, for example. The front end of the side pipe 35 is fixed to the head pipe 27 by welding or the like. The side pipe 35 extends linearly from the head pipe 27 toward a vertical pipe 39 which will be described later, and bends in front of the vertical pipe 39. It is further bent and extended toward 9. The side wheel shaft support portion 37 is connected to the rear end portion of the side pipe 35 and supports the wheel shaft 17 of the side wheel 9. The representative side wheel shaft support portion 37 is a fork member that branches and extends from the rear end portion of the side pipe 35 toward both ends of the wheel shaft 17 and supports the wheel shaft 17 with both ends. Through the side frame body 29 having such a configuration, the relative positional relationship of the side wheels 9 with respect to the front wheels 5 is connected in a fixed state.

  The main frame body 31 is connected to the head pipe 27 so as to be rotatable about an axis parallel to the rear wheel shaft 19 and supports the occupant by supporting the rear wheel shaft 19. The main frame body 31 typically includes a vertical pipe 39 to which the seat device 13 is attached via a seat part 41, and a rear pawl (not shown) that supports the rear wheel shaft 19 from the upper end of the vertical pipe 39. A back fork 43 (not shown in FIG. 2) extending toward the rear, a hanger lug 45 provided at the lower end of the upright pipe 39 to which the driving device 15 is attached via a hanger part (not shown), and a rear from the hanger lug 45 A chain stay 47 (not shown in FIG. 2) extending toward the pawl and a connecting pipe 49 extending from the standing pipe 39 toward the head pipe 27 are provided. The leading end of the connecting pipe 49 is connected to the head pipe 27 via a joint 53 having a shaft 51 (in this embodiment, a horizontal axis orthogonal to the traveling direction F) parallel to the rear wheel shaft 19. The main frame body 31 rotates relative to the side frame body 29 around the shaft 51 at the tip of the connecting pipe 49 connected in this way. The connecting pipe 49 is disposed below the side pipe 35 and is connected to the side wall of the head pipe 27 below the side pipe 35.

  The stopper 33 limits the rotation range of the main frame body 31. An example of the stopper 33 is a metal wire that is loosely bridged between the main frame body 31 and the side frame body 29 in a state where the vehicle body is upright. When the main frame body 31 reaches a predetermined rotation position with respect to the side frame body 29, this wire becomes a tension state and restricts further rotation of the main frame body 31. Note that the rotation range of the main frame body 31 is determined by the amount of looseness of the metal wire. This amount of looseness can be determined according to the passenger's preference, weight, etc., or can be determined in proportion to the spacing between the rear wheel 7 and the side wheel 9.

  In the present embodiment, the carrier 55 is provided above the side wheel 9 and attached to the wheel shaft 17 of the side wheel 9.

  The frame body 23 having the above-described configuration is a portion where the main frame body 31 is connected to the head pipe 27 when the main frame body 31 is tilted toward the side frame body 29 during the traveling of the two-wheeled bicycle 1 with a side vehicle. It rotates in a direction away from each other about a certain axis 51. From there, when the main frame body 31 is further tilted, the stopper 33 acts to limit the rotation range of the main frame body 31. At this time, a part of the occupant's load is transmitted to the side frame body 29 more via the main frame body 31, and the occupant can be stably driven with the front wheel 5, the rear wheel 7 and the side wheel 9 in a well-balanced manner. It becomes. Therefore, the two-wheeled bicycle 1 with a side vehicle provided with the frame body 23 can suppress an accident such as losing balance and falling while traveling as much as possible, and is suitable for an elderly person with a weak sense of balance.

According to the frame body 23 according to the present embodiment, the following effects are obtained in a range where the rotation of the main frame body 31 is not limited by the stopper 33.
For example, during upright running, when the side wheel 9 gets over a convex obstacle on the running surface, the rear side of the side frame body 29 is lifted together with the side wheel 9, and the head pipe 27 tilts forward. As the side frame body 29 and the head pipe 27 move as described above, the main frame body 31 rotates around the connecting portion, and thus is not affected by obstacles. In this way, the frame body 23 is not transmitted to the main frame body 31 due to the influence of the side frame body 29 received from the obstacles, and operates like a suspension, so that the riding comfort is not impaired.

  Since the main frame body 31 rotates about the shaft 51 with respect to the side frame body 29, the rear wheel 7 and the side wheel 9 move up and down independently of each other. The vehicle body 3 can travel stably without being shaken from side to side.

  Further, in cornering on a flat ground, the main frame body 31 can be tilted to the left and right in the traveling direction F, so that smooth cornering can be achieved that is almost inferior to a general two-wheeled bicycle.

  Furthermore, when traveling across an inclined surface, the rear wheel 7 moves to a high position or a low position with respect to the side wheel 9 according to the height of the inclination, so that the vehicle body portion 3 stands upright without being inclined. The posture is maintained. Therefore, the occupant can pedal in a normal riding posture. In addition, since no twist is generated between the main frame body 31 and the rear wheel 7, the driving device 15 can use the configuration of a conventional two-wheeled bicycle as it is.

  Furthermore, the side frame body 29 fixed to the head pipe 27 is subjected to a part of the passenger's load received by the main frame body 31 via the head pipe 27. That is, the side frame body 29 is always in a state where a force is applied downward due to the load of the occupant. For this reason, the side wheel 9 does not jump up when it gets over the obstacle or falls into the depression. Therefore, when the carrier 55 is mounted on the side wheel 9 and the load is loaded, the impact received by the load can be reduced. Therefore, it is suitable for carrying a broken article in the cargo box attached to the carrier 55.

  Further, the side wheel 9 is arranged on the right side in the traveling direction F of the rear wheel 7, and the side frame body 29 is formed on the right side from the main frame body center plane (a plane formed by the centerlines of the connecting pipe 49 and the standing pipe 39). Therefore, the side frame body 29 and the side wheels 9 do not get in the way for the occupant straddling the main frame body 31 from the left side in the traveling direction F, and it is easy to ride.

  Further, the main frame body 31 may be connected to a joint provided on the side pipe 35. In this case, it is preferable to be connected to the front end portion of the side pipe 35. Thereby, for example, when the side frame body 29 rides on an obstacle, the head angle change that occurs when the main frame body 31 rotates with respect to the side frame body 29, and the rear wheel 7 and the front wheel. Since the change in the wheelbase length of 5 is reduced, it is possible to travel without a sense of incongruity.

  In the main frame body 31, the rear end of the connection pipe 49 is connected to the standing pipe 39, but the present invention is not limited to this, and the connection pipe 49 may be connected to the hanger lug 45.

  The frame body of the present invention is not limited to the above embodiment. For example, as shown in FIGS. 3 and 4, the side frame body 29 may be configured to include a main body portion 57 and a connected portion 59 that are detachably connected to each other. Such a main body 57 and a connected portion 59 can be formed by dividing the side pipe 35, for example.

  The main body 57 has the side wheel 9 attached thereto, and the side wheel shaft support portion 37 and the extension portion 61 of the side pipe 35 that is bent and extends from the side wheel shaft support portion 37 toward the standing pipe 39. It is the structure provided with. The connected portion 59 has a front end fixed to the head pipe 27 and a main body portion 57 connected to the rear end, and typically extends linearly from the head pipe 27 toward the standing pipe 39. This configuration includes a straight portion 63 of the side pipe 35 and a bent portion 65 of the side pipe 35 bent from the straight portion 63 toward the arrangement of the side wheels 9. Although the connection aspect of the main-body part 57 and the to-be-connected part 59 is not specifically limited, For example, the front-end | tip (the front-end | tip of the extension part 61) of the main-body part 57 and the rear end (the front-end | tip of the bending part 65) of the to-be-connected part 59, ie, A pair of flanges 67 provided in the divided portion of the side pipe 35 are aligned with each other, and are connected using a grooved band 69 into which the paired flanges 67 are fitted. In addition, the pair of flanges 67 may be connected by screwing or the like. Further, in order to improve the connection strength, an insertion portion 71 may be provided at the tip of the main body portion 57 and the insertion portion 71 may be inserted into the rear end of the connected portion 59. Further, the insertion portion 71 and the rear end portion of the connected portion 59 may be screwed together.

  The side frame body 29 can be attached and detached with the main body 57 as required. Moreover, if the main-body part 57 from which the diameter of the side wheel 9 differs is prepared, the side wheel 9 according to a passenger | crew's liking can be selected. Furthermore, if the main body 57 having a different design is prepared, it is possible to select a design according to the passenger's preference.

  Further, as shown in FIG. 5, the rear end portion of the connected portion 59 may be fixed to the standing pipe 39 of the main frame body 31 when the main body portion 57 is removed. For example, a screw 73 that is inserted from the rear surface to the front surface of the standing pipe 39 and attached to the surface of the bent portion 65 that faces the front surface of the standing pipe 39 is used. In this case, the connected portion 59 of the side frame body 29 fixes the head pipe 27 and the standing pipe 39 to each other like the upper pipe in a general bicycle. That is, the connected portion 59 functions as a support portion that restricts the rotation of the main frame body 31 via the joint 53. Therefore, the same traveling as a general bicycle is possible. In the state where the main body 57 is attached, the screw 73 is removed from the surface of the bent portion 65.

  As shown in FIGS. 1 and 2, in the two-wheeled bicycle 1 with a side vehicle using the frame body 23 of the present invention, when the vehicle body portion 3 is tilted to the right in the traveling direction F, the stopper 33 acts to move the front wheel 5. Since the vehicle body part 3 is supported by the rear wheel 7 and the side wheel 9 and is self-supporting, it is not necessary to park using a stand. However, a single stand (not shown) may be attached to the left side in the traveling direction F of the main frame body 31 in order to prevent falling to the left side. This single stand is attached across the back fork 43 and the chain stay 47 of the main frame body 31.

  The embodiments of the present invention have been described above. However, the present invention can be implemented in various forms added with various improvements, corrections, and modifications based on the knowledge of those skilled in the art without departing from the spirit of the present invention. All the embodiments belong to the scope of the present invention.

  For example, in the above embodiment, the front wheel 5 and the rear wheel 7 are arranged in a straight line. That is, the center line of the head pipe 27 is included in the center plane of the main frame body. However, the present invention is not limited to this aspect, and the center line of the head pipe 27 is shifted to the left and right with respect to the center plane of the main frame body. May be provided. For example, if the head pipe 27 is disposed closer to the side frame body 29 than the main frame body center plane, the main frame body 31 is liable to tilt toward the side frame body 29 during parking and can be made independent.

  The stopper is not limited to a metal wire, and when the main frame body 31 reaches a predetermined rotation range, the stopper is in a tension state between the main frame body 31 and the side frame body 29, and the main For example, a member such as a chain or a link mechanism that restricts the rotation of the frame body 31 can be employed. Further, the metal wire as the stopper 33 may be loosely bridged between the connection pipe 49 of the main frame body 31 and the head pipe 27. In this case, the attachment position of the wire in the head pipe 27 is a position above the connection pipe 49.

Further, the shape of the side pipe 35 is not limited to the illustrated one, and other shapes that do not hinder pedaling of the occupant and do not disturb the rotation of the main frame body can be adopted. For example, the side pipe extends from the head pipe 27 to the side in the running direction F (right side horizontal direction), and from the tip of the side extension to the wheel shaft 17 of the side wheel 9. The structure provided with the back extension part extended back may be sufficient. When the side pipe is configured in this way, it is preferable that the metal wire as the stopper is attached to the protruding portion protruding backward from the head pipe 27 and the lower portion is attached to the connecting pipe 49. . For example, the projecting portion is a rod-shaped member whose front end is fixed to the upper portion of the head pipe 27 and whose rear end is located between the head pipe 27 and the standing pipe 39. In such a side pipe, the side extension portion may be divided to form the main body portion and the connected portion. Further, a support member may be provided between the protruding portion and the connecting pipe 49 when the main body is removed.
The support member is, for example, a metal rod-like body, and the upper end is attached to the protruding portion and the lower end is attached to the connection pipe 49. Thereby, the protrusion and the connection pipe 49 are fixed to each other via the support member, and the rotation of the main frame body 31 via the joint 53 is limited. Therefore, the same traveling as a general bicycle is possible.

  Moreover, although the two-wheeled bicycle with a side vehicle has been described as an example of the embodiment of the present invention, the present invention is not limited to this, and can be used as a frame body for a two-wheeled vehicle with a side vehicle or a scooter. For example, in a general motorcycle, a frame body excluding the head pipe can be used as the main frame body of the present invention. Further, in the scooter, a portion on which a passenger's foot is placed and a portion that supports the rear wheel shaft can be used as the main frame body of the present invention. These main frame bodies are connected to the head pipe via a joint that is rotatable about a horizontal axis. Furthermore, a side frame can be provided on the side of the main frame body, extending from the head pipe to the side wheel, and supporting the wheel shaft of the side wheel.

DESCRIPTION OF SYMBOLS 1 ... Two-wheel bicycle 7 with a side car ... Rear wheel 9 ... Side wheel 17 ... Wheel axle 19 of a side wheel ... Rear wheel axle 23 ... Frame body 27 ... Head pipe 29 ... Side frame body 31 ... Main frame body 33 ... Stopper 39 ... Vertical pipe 51 ... Shaft 57 parallel to rear wheel axis ... Main body 59 ... Connected part

Claims (4)

A frame body of a two-wheeled vehicle with side wheels having side wheels on one side of a two-wheeled vehicle having front wheels and rear wheels,
A head pipe,
A side frame that extends from the head pipe toward the side wheel and on which a wheel shaft of the side wheel is supported;
It has a connecting part connected to the head pipe or the side frame body so as to be rotatable around an axis parallel to the wheel axis of the rear wheel, and the wheel axis of the rear wheel is pivotally supported and supports an occupant. A mainframe body,
A stopper for limiting the rotation range of the main frame body;
A frame body of a two-wheeled vehicle with a side vehicle, comprising:   The frame body of a two-wheeled vehicle with a side vehicle according to claim 1, wherein the side frame body is disposed on the right side in the traveling direction with respect to a center plane of the main frame body. The side frame body is
A main body to which the side wheels are attached;
A connected portion that is detachably connected to the body portion;
The frame body of the two-wheeled vehicle with a side vehicle according to claim 1 or 2, characterized by comprising:   A support portion is provided between the main frame body and the head pipe when the main body portion of the side frame body is removed, and restricts rotation of the main frame body. Item 4. A frame body of a motorcycle with a side vehicle according to Item 3.

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