JP7596047B2 - Moped - Google Patents

Description

The present invention relates to a motorized bicycle.

Conventionally, the body frame structure of motorized bicycles has adopted a double frame structure as disclosed in Patent Document 1 from the viewpoint of ensuring rigidity and stability during high-speed driving. This structure of Patent Document 1 is composed of a main frame extending from the head pipe, a rear frame that branches into two and extends rearward from the main frame, a pair of down tubes hanging down from the head pipe on the left and right, a lower pipe that is bent from the down tube and extends approximately horizontally, a center frame that rises from the rear end of the lower pipe, and stays that connect the center frame and the rear frame. The step, which is the part on which the rider places their feet, is composed of a support plate, a pipe that runs around the edge of the support plate, and a rubber plate that is attached to the top surface of the support plate, and the support plate is connected to the down tube by stays.

Patent No. 4188136

However, the foot rests of existing motorized bicycles are not easy to remove or replace, unlike the structure of Patent Document 1, which is directly attached to the down tube. On the other hand, with the diversification of consumer preferences in recent years, there is a demand for foot rests that suit the rider's preferences, and there is a demand for a structure that allows the foot rest to be easily replaced according to the rider's preferences.

The present invention has been proposed in light of the above problems, and aims to provide a motorized bicycle that allows the foot rest to be easily replaced according to the rider's preference.

The motor-driven bicycle of the present invention is characterized in that a locking bar is provided protruding in the left and right directions around the lower end of the down tube which extends diagonally downward from the head pipe to which the operating handle is attached, and a point-shaped upper engagement portion and a point-shaped lower engagement portion are respectively formed on the upper and lower sides of the locking bar, the upper footrest half is positioned by engaging a point-shaped engagement protrusion protruding downward with the upper engagement portion, and the lower footrest half is positioned by engaging a point-shaped engagement protrusion protruding upward with the lower engagement portion, and the upper footrest half and the lower footrest half are removably fixed to a recess provided in a position forward or rearward of the locking bar of the upper footrest half to form a footrest portion.
According to this, the upper footrest half is positioned by engaging the engaging protrusion with the upper engaging part of the locking bar, and the lower footrest half is positioned by engaging the engaging protrusion with the lower engaging part of the locking bar, so that the upper footrest half and the lower footrest half can be easily positioned and fixed, in other words, the footrest part can be easily positioned and fixed. Also, by forming the footrest part by removably fixing the upper footrest half and the lower footrest half, the footrest part can be easily replaced according to the driver's preference. Also, by fixing the upper footrest half at a recess provided in a position forward or rearward of the locking bar of the upper footrest half, the fixing point can be prevented from interfering with the driver's footrest.

The motor-driven bicycle of the present invention is characterized in that the upper footrest half and the lower footrest half are fixed in the recess by bolts, and the height of the protruding portion formed by the bolts is set lower than the depth of the recess.
This can reliably prevent the bolt fastening points between the upper footrest half and the lower footrest half from interfering with the driver's placing his/her feet on the footrest portion.

The motor-driven bicycle of the present invention is characterized in that the upper footrest half body and the lower footrest half body are press-molded products.
According to this, by forming the upper and lower footrest halves into press-molded products, the effective area of the footrest portion on which the feet are placed can be enlarged easily and at low cost. Also, a wide variety of upper and lower footrest halves can be easily formed, which promotes diversification of the types of footrest portions.

The moped of the present invention is a moped that travels at a low speed of 20 km/h or less, and is characterized in that the down tube, a curved portion provided at the lower end of the down tube, and a rear tube extending diagonally upward from the curved portion are formed from a single frame, and the locking bar is provided to pass through the curved portion.
This allows the foot rest of a motorized bicycle traveling at low speeds to be easily replaced according to the rider's preference. By forming the down tube, the curved portion, and the rear tube as a single frame, the rider can easily place his/her feet on either the left or right side of the body or in front or behind the foot rest, and the rider can easily place his/her feet on the ground when the motorized bicycle traveling at low speeds is stopped. In addition, by locating the curved portion and the foot rest near the minimum ground clearance of the single frame, even riders such as short people or elderly people can easily straddle the single frame to get on and off the motorized bicycle traveling at low speeds.

The motorized bicycle of the present invention allows the rider to easily change the foot rest according to their preference.

1 is a side view of a motorized bicycle according to an embodiment of the present invention; FIG. 2 is a side view of a head pipe, a down tube, a bent portion, and a rear tube of the motor-driven bicycle according to the embodiment. 1A is a plan view of a head pipe, a down tube, a bent portion and a rear tube of a motor-driven bicycle according to an embodiment of the present invention, and FIG. FIG. 2 is a plan view of the vicinity of a footrest of the motor-driven bicycle according to the embodiment. FIG. 6 is an enlarged end view of FIG. 5 along the line B-B.

[Motorcycle of the embodiment]
1 to 3, the motorized bicycle 1 according to an embodiment of the present invention is a motorized bicycle 1 that travels at a low speed, preferably 20 km/h or less, and includes a head pipe 2, a down tube 3 extending diagonally downward from the head pipe 2, a bent portion 4 provided at the lower end of the down tube 3, and a rear tube 5 extending diagonally upward from the bent portion 4 as a vehicle body frame structure, with the down tube 3, bent portion 4, and rear tube 5 being formed of a substantially cylindrical single frame that extends in a straight line in a plan view. The down tube 3, bent portion 4, and rear tube 5 in this embodiment are formed of bent pipes made of the same metal material, such as stainless steel, aluminum alloy, or aluminum-carbon-steel.

The down tube 3, curved section 4, and rear tube 5, which are made up of a single frame, have the required strength required for the body frame structure of a motorized bicycle 1 that travels at a low speed of preferably 20 km/h. In order to ensure the required strength as a body frame and to make it easier for the rider to place their feet on the ground when stopped, the left and right widths of the down tube 3 and curved section 4 are preferably formed to be 350 mm to 450 mm, more preferably 350 mm to 400 mm, and the left and right widths of the rear tube 5 are preferably formed to be 600 mm to 700 mm, more preferably 600 mm to 650 mm.

A cylindrical handle post 6 is provided on the upper side of the head pipe 2 and is fixed to the head pipe 2 by fitting or welding, etc., and a cylindrical operating handle 7 that is roughly U-shaped in plan view is provided at the upper end of the handle post 6. That is, the operating handle 7 is attached to the head pipe 2 via the handle post 6. The grip at the tip of the operating handle 7 is provided with an operating unit 8 that allows the rider 100 to operate the motorized bicycle 1 to drive, stop, decelerate, accelerate, etc. A front fork 9 is provided on the lower side of the head pipe 2 and is fixed to the head pipe 2 by fitting or welding, etc., and a front wheel 10 is rotatably supported at the lower end of the front fork 9.

A cylindrical rear stay 11 is provided behind the bent portion 4, and the rear stay 11 is fixed to the rear side of the bent portion 4 by welding or the like, and is provided so as to extend rearward substantially horizontally. The upper end of a seat stay 12 extending diagonally downward toward the rear is fixed to a position near the top of the rear tube 5 by welding or the like, and the seat stay 12 and the rear stay 11 are arranged in a substantially V-shape in side view. A rear wheel 13 is rotatably supported at the intersection of the rear end of the seat stay 12 and the lower end of the rear stay 11, and a motor device 14 is provided to control and operate the rear wheel 13 by driving, stopping, decelerating, accelerating, etc. The motor device 14 and the operating unit 8 are connected by a connection wire that is wired through the inside of the operating handle 7, the handle post 6, the head pipe 2, the down tube 3, the bent portion 4, and the rear stay 11 (not shown).

A seat support tube 15 is provided at a position above the fixed point of the seat stay 12 on the rear tube 5, so as to be approximately horizontal and slightly inclined downward toward the rear. The seat support tube 15 is composed of a left U-shaped pipe material 151 located on the left side in a plan view and a right U-shaped pipe material 152 located on the right side in a plan view, and one end of the left U-shaped pipe material 151 located on the rear side and one end of the right U-shaped pipe material 152 are fixed to the rear tube 5 by welding or the like at the same height. The other end of the left U-shaped pipe material 151 located on the front side and the other end of the right U-shaped pipe material 152 are fitted together to form the seat support tube 15, which is approximately rectangular in plan view and supports the seat 17 to be placed and fixed.

The underside of the front end of the seat support tube 15 is supported by a left support stay 161 and a right support stay 162, which are roughly L-shaped in side view. One end of the left support stay 161, which is located on the lower side, and one end of the right support stay 162 are fixed by welding or the like to the rear tube 5 at the same height at a midpoint of the rear tube 5 lower than the fixing point of the seat stay 12. The other end of the left support stay 161, which is located on the upper side, is fixed by welding or the like to the lower side of the left U-shaped pipe material 151, and the other end of the right support stay 162, which is located on the upper side, is fixed by welding or the like to the lower side of the right U-shaped pipe material 152.

In this embodiment, the inclination angle of the rear tube 5 with respect to the horizontal is preferably 40° to 50°, more preferably 40° to 45°, and the seat support tube 15 is provided at a height of preferably 300 mm to 450 mm, more preferably 400 mm to 450 mm, from the lowest end of the bent portion 4 of the rear tube 5, and a seat 17 that is roughly L-shaped in side view is placed on the seat support tube 15 that is installed at this height.

The curved portion 4 provided around the lower end of the down tube 4 of the motorized bicycle 1 is positioned within a range from within 20% of the length of the wheelbase on the front side of the midpoint M to within 20% of the length of the wheelbase on the rear side of the midpoint M, based on the midpoint M of the line segment connecting the front axle 101 of the front wheel 10 and the rear axle 131 of the rear wheel 13, and is positioned within the range of the curved portion placement setting region R in FIG. 2. In addition, the distance L from the rear end 171 of the seat surface of the seat 17 to the midpoint of the front-to-rear length of the footrest portion 18 described later is preferably 400 mm to 500 mm, and more preferably 425 mm to 475 mm.

The bent portion 4 is provided with a fixed foot rest 18 that protrudes locally to the left and right. In this embodiment, a locking bar 19 is provided at the bent portion 4 so as to protrude in the left and right directions, and in the illustrated example, a series of tubular locking bars 19 are inserted into through holes in the bent portion 4 and provided so as to penetrate the bent portion 4. The locking bar 19 is fixed by welding or the like to the periphery of the through hole in the bent portion 4, and is fixed so that the left and right protruding lengths from the bent portion 4 are the same and constant, and the foot rest 18 is attached to this locking bar 19.

As shown in Figs. 3 to 5, the footrest portion 18 in this embodiment is composed of an upper footrest half body 181 and a lower footrest half body 182, and the upper footrest half body 181 and the lower footrest half body 182 are each formed by press molding. The upper footrest half body 181 is formed with an engagement protrusion 1811 that protrudes downward like a point, and the lower footrest half body 182 is formed with an engagement protrusion 1821 that protrudes upward like a point. In addition, a point-like upper engagement portion 191 composed of an engagement hole is formed on the upper side of the locking rod 19, and a point-like lower engagement portion 192 composed of an engagement hole is formed below the position corresponding to the upper engagement portion 191 of the locking rod 19.

The upper footrest half 181 is positioned by engaging the engagement protrusion 1811 with the upper engagement portion 191 of the locking rod 19, and the lower footrest half 182 is positioned by engaging the engagement protrusion 1821 with the lower engagement portion 192 of the locking rod 19, and the upper footrest half 181 and the lower footrest half 182 are positioned so that they are aligned.

The upper footrest half 181 and the lower footrest half 182 are detachably fixed to each other in recesses 1812 and 1813 provided respectively in front and rear of the locking rod 19 of the upper footrest half 181, forming the footrest portion 18. In this embodiment, the upper footrest half 181 and the lower footrest half 182 are fixed to each of the recesses 1812 and 1813 by fastening the bolts 20 and nuts 21 to form the footrest portion 18.

Furthermore, in this embodiment, the height of the protruding portion due to bolt tightening is set lower than the depth of each of the recesses 1812 and 1813, and in the illustrated example, the height of the head of the bolt 20 is set lower than the depth of each of the recesses 1812 and 1813, and the head of the bolt 20 is accommodated inside the recesses 1812 and 1813, in other words, it is arranged so that it does not protrude above the foot placement surface. In addition, in this embodiment, recesses 1822 and 1823 are provided in front and rear positions of the locking rod 19 of the lower foot placement half 182, and are arranged so that the nut 21 tightened by the bolt tightening of the bolt 20 is accommodated inside the recesses 1822 and 1823.

According to the motorized bicycle 1 of this embodiment, the engagement protrusion 1811 of the upper footrest half 181 is engaged with the upper engagement portion 191 of the locking bar 19 to position it, and the engagement protrusion 1821 of the lower footrest half 182 is engaged with the lower engagement portion 192 of the locking bar 19 to position it, so that the upper footrest half 181 and the lower footrest half 182 can be easily positioned and fixed, in other words, the footrest portion 18 can be easily positioned and fixed. In addition, the upper footrest half 181 and the lower footrest half 182 are detachably fixed to form the footrest portion 18, so that the footrest portion 18 can be easily replaced according to the rider's preference.

In addition, by fixing the upper footrest half 181 at recesses 1812, 1813 provided in front and rear positions of the locking rod 19, it is possible to prevent the fixing points, such as the bolt fastening points, from interfering with the driver's footrest.

In addition, by forming the upper footrest half body 181 and the lower footrest half body 182 as press-molded products, the effective area of the footrest portion 18 on which the feet are placed can be easily and inexpensively enlarged. Also, a wide variety of upper footrest half bodies 181 and lower footrest half bodies 182 can be easily formed, which promotes diversification of the types of footrest portion 18.

In addition, by forming the down tube 3, curved section 4, and rear tube 5 of the moped 1 traveling at low speed from a single frame, the rider 100 can easily place his/her feet on either the left or right side of the body of the moped 1 or in front or behind the footrest 18, and the rider 100 can easily place his/her feet on the ground when the moped 1 traveling at low speed is stopped. In addition, by locating the curved section 4 and the footrest 18 near the minimum ground clearance of the single frame, even riders 100 who are short or elderly can easily straddle the single frame to get on and off the moped 1 traveling at low speed.

[Scope of the invention disclosed herein]
The inventions disclosed in this specification include, in addition to the inventions and embodiments listed as inventions, those specified by changing partial contents of these to other contents disclosed in this specification, those specified by adding other contents disclosed in this specification to these contents, or those specified by deleting partial contents of these to the extent that partial effects can be obtained, and specifying them as a higher-level concept. The inventions disclosed in this specification also include the following modified examples and added contents.

For example, the motorized bicycle on which the footrest of the present invention is formed can be any suitable motorized bicycle other than the motorized bicycle 1 that travels at low speed in the above embodiment. In addition, the upper footrest half and the lower footrest half of the present invention can be processed products other than press-molded products. In addition, the upper footrest half and the lower footrest half of the present invention can be fixed in any suitable manner within the scope of the spirit of the present invention, and can be fixed in any manner other than bolt fastening, such as by screws.

The recess in the upper foot rest half, which houses the fixing points for removably fixing the upper and lower foot rest halves, can also be provided only in front of the locking rod of the upper foot rest half or only in the rear of the locking rod, depending on the fixing points.

The present invention can be used in motorized bicycles that have a footrest.

1...motorcycle 2...head pipe 3...down tube 4...bent portion 5...rear tube 6...handle post 7...operating handle 8...operating portion 9...front fork 10...front wheel 101...front wheel axle 11...rear stay 12...seat stay 13...rear wheel 131...rear wheel axle 14...motor device 15...seat support tube 151...left U-shaped pipe material 152...right U-shaped pipe material 161...left support stay 162...right support stay 17...seat 171...rear end of seat cushion 18...foot rest 181...upper foot rest half 1811...engaging protrusion 1812, 1813...recess 182...lower foot rest half 1821...engaging protrusion 1822, 1823...recess 19...locking rod 191...upper engaging portion 192...Lower engagement part 20...Bolt 21...Nut 100...Driver M...Midpoint of the line segment connecting the front and rear axles H...Wheelbase R...Bend placement setting area L...Distance from the rear end of the seat to the midpoint of the length of the footrest in the front-to-rear direction

Claims (4)

A locking rod is provided protruding in the left and right directions around the lower end of a down tube that extends obliquely downward from a head pipe to which an operating handle is attached,
The locking rod is provided with a dot-shaped upper engagement portion and a dot-shaped lower engagement portion on the upper and lower sides thereof,
The upper footrest half is positioned by engaging a dot-like engagement protrusion protruding downward with the upper engagement part,
The lower footrest half is positioned by engaging an engagement protrusion protruding in a dot shape on the upper side with the lower engagement part,
The motor-driven bicycle is characterized in that the upper foot rest half and the lower foot rest half are detachably fixed to each other in a recess provided in a position forward or rearward of the locking bar of the upper foot rest half to form a foot rest portion. The upper footrest half and the lower footrest half are fixed to each other by bolts in the recesses.
2. The motor-driven bicycle according to claim 1, wherein the height of the protruding portion fastened by the bolt is set lower than the depth of the recess. The motorized bicycle according to claim 1, characterized in that the upper footrest half and the lower footrest half are press-molded products. A motorized bicycle that travels at a low speed of 20 km/h or less,
the down tube, a bent portion provided at a lower end of the down tube, and a rear tube extending obliquely upward from the bent portion are formed as a single frame,
4. The motor-driven bicycle according to claim 1, wherein the engaging rod is provided so as to pass through the bent portion.

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