JP2017165385A - Shockless bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a generally commercially available bicycle keeps impact or the like relaxed only by air pressure filling the tube in a wheel tire and by springs under a saddle and it has to be said that a further improvement is presently impossible on feeling that a further improvement in comfortableness is necessary because impact or vibration gives a considerable discomfort sense to a person boarding in accordance with a speed when a bicycle travels over the curb of a road or the boundary between a driveway and a sidewalk though a considerable comfort travel is possible when traveling over a paved road in a recent urban area.SOLUTION: This invention to improve comfortableness realizes a more comfortable travel by attaching an impact-relaxing mechanism or device which copes with irregularities or projections of a road to travel over while focusing on a present bicycle's frame structure along with a bicycle's frame to improve problems by remarkably modifying a conventional bicycle's structure.SELECTED DRAWING: Figure 1

Description

  In recent years, cheap bicycles have been imported, and their use has exploded. The number of bicycle parking lots and accidents have increased, and safety measures have become urgent. More than 180 years have passed since the bicycle was invented, but the basic structure has not changed much and has now reached the present. As is well known, the benefits of bicycles are extremely effective and differ greatly compared to human walking, and their use will continue to contribute greatly to humanity in the future. Bicycles that use electric motors as auxiliary power have also increased in popularity in recent years, and the effects of the auxiliary action are significant in cities with many slopes, and the reduction of human power and comfortable and light driving are realized. However, the utility of bicycles in the current situation is large, but the drawbacks of bicycles are still not so much improved in the past and are the same from the old days. That is, in a general commercial vehicle, there is not much technical progress in terms of vibration and puncture problems during travel. This means that if a puncture occurs during traveling, the puncture cannot be continued unless the puncture is repaired at that time, and the traveling must be stopped and the destination cannot be reached. . In addition, impacts such as vibrations may cause adverse effects such as fatigue accumulation during long-time running.

  In general commercial vehicles, tires are fitted into the rim of the wheel and a tube is installed inside, and the inside is filled with air to absorb the impact generated by road surface irregularities using air pressure to absorb the impact. However, it is uncomfortable for the rider who is riding the shock generated at this time, and if there is further relaxation during traveling, comfortable traveling can be realized. Most current commercial vehicles have a structure that absorbs the impact during driving with the tire structure and the spring structure located under the saddle, but this structure has limitations in absorbing vibration and shock. Therefore, there is a need for a system that improves the quality of absorption capacity by other mechanisms. Some parts have been improved and a special structure for absorbing shocks is sold. However, the structure has become complicated and the unit price has increased, resulting in a lack of mass penetration. Is the actual situation. In the present invention, the second embodiment in which the torsion bar springs are arranged horizontally on the main frame of the bicycle as shown in FIG. 1 and the front part of the torsion bar springs are arranged in the upper and lower parts as shown in FIG. The system of the third embodiment and the system of the third embodiment in which the steel pipe hype is arranged with a special structure as shown in FIG. 9 are presented.

  Japanese Patent No. 2688396   Japanese Patent No. 3122610

  The current ordinary commercial vehicle absorbs shocks and vibrations from the traditional tire tube air pressure and saddle spring structure due to its price. There are limits to getting enough comfort for the person. As is well known, the basic structure of a bicycle is that the rear wheel of the front wheel is arranged on a steel pipe with a pipe structure so that two triangles are arranged in a line, and the axle of the hub, which is the center of the front wheel, is attached to the front end angle portion The rear wheel axle is arranged at the tip of the rear triangle, and a saddle is attached to the upper part of the joint that becomes the contact point of the front and rear triangles, and the drive becomes the central axis of the chain that rotates the rear wheel in the lower triangle part The bottom bracket, which is a shaft, is arranged, and the rotating shaft part of the pedal is connected to the rear hub via a transmission device such as a chain. The rear wheel is rotated by the transmission device such as a chain when the rider rotates the petal with his feet. In this structure, the front and rear wheel axles and the pipe frame are integrated, and the vibration and impact from the road surface is constantly transmitted to the entire frame structure. Vibrations to those through the dollars and the saddle, impact shocks which are not absorbed in the spring structure of the pneumatic and saddle bottom in the tire mentioned above will be communicated to Nowa person. Derived from this basic structure, the structure of the current bicycle has changed to a slightly modified structure. In general bicycles, the center part of the pipe part on the upper side of the front triangle falls to the lower part and is connected to the pipe part in the center part of the triangle, so that women can wear skirts. It has a structure that can easily straddle the saddle on the forefoot. The vibration shock transmitted from the road surface is only mitigated by the air pressure in the tire tube of the wheel and the spring body under the saddle, but this is not enough, and it is equipped with further vibration and shock mitigation mechanisms. In order to make such an improvement measure in this plan, it is possible to run lightly by mitigating impact vibration by making a unique action structure with various shock absorbers and special frame structure It is. In addition, current commercial bicycles often puncture when pins or nails falling on the road get stuck in the tires, but at present, there have been no sufficient measures to prevent this problem. The present invention also takes a solution to this problem.

  The configuration of the bicycle body of the first embodiment of this proposal is not a frame configuration in which two sets of triangular pipe steel pipes are symmetrically combined as in a conventional bicycle, but a bicycle main frame (except for Embodiment 3). The torsion bar springs are made of various shapes of steel, and two bar-shaped bars with a length from the front tube head tube support to the rear wheel rear hub support are arranged in parallel on the left and right. The rear bracket and the rear wheel hub are supported and fixed to the front and rear of the bar, respectively, and a bottom bracket that is a pedal rotation shaft such as a chain that rotationally drives the rear wheel is arranged in the middle of the torsion bar spring. A structure in which the wheeler rotates with his / her foot and rotates the rear wheel with a chain, etc., on the top of the bottom bracket which is the pedal and crankshaft mounting shaft. A seat tube is arranged, and a vibration absorption mitigation device (rear suspension) with a combination of a spline and a spring with an anti-rotation structure is fitted to the upper part, and a saddle is arranged on the upper part. Between the rear wheel hub and the seat tube A seat stay is provided, and the triangular shape forms a structure that allows the rider to run safely and strengthens the overall structure of the bicycle, thereby driving safely.

  The front wheel head tube has a structure with only two torsion bar springs connected to a bar-shaped frame and does not have a top tube as usual, and the two left and right frames double as a conventional top tube and down tube. It is. A vibration absorption mitigation device (front suspension) with a spline structure is arranged inside the head tube of the front wheel, which acts as a vibration impact mitigation device for the vertical movement of the front wheel during traveling, such as impact from the road surface of the front wheel during traveling The spline shaft and the spline shaft are alleviated by the action of the spring, and the shock transmitted to the handlebar is eliminated by the front suspension in the head tube that is pushed up from the front wheel to the front fork. It is something to lose.

  The rear wheel side of the torsion bar spring is connected to a rear wheel hub to support the rear wheel part, and a bottom bracket is provided in the middle part of the torsion bar spring, and the weight of the rider's weight rides on this bottom bracket. Become. This causes the midpoint of the torsion bar spring to sink. By using a torsion bar spring that matches the weight of the rider, when the front wheel rises when riding on a step on the road surface, the middle point of the spring bar is weighted when the front wheel rises. When the bar warps downward a little, the impact transmitted from the road surface to the front wheels due to deformation is alleviated by the elasticity of the torsion bar spring and transmitted from the saddle to the rider via the seat tube. In the structure according to the present invention, the shock transmitted by the torsion bar spring is also reduced by the relaxation action of the tire pressure cushion and only the relaxation action of the saddle spring.

  In the first method, the vibration shock when the front wheel rides on the road step, etc. due to the relaxation action of the torsion bar spring of the main frame is affected by the action of the spline part (front suspension) in the front wheel head tube and the suspension of the seat pillar part (rear) The front wheels are relaxed by the action of the special spline shaft and spring of the suspension. Similarly, if the rear wheel also travels in a straight line, the rear wheel also rides on the rear wheel from the back of the front wheel, and the vibration shock repeats in the same way as the front wheel. The torsion bar springs on the rear wheel hub from the pedal rotation shaft of the main frame will also bend slightly during driving. Since the rear spring bar is located on the upper part of the pedal rotation shaft (bottom bracket), the seat stay is pushed forward by the distance that the frame stays back toward the seat tube when the rear wheel frame is bent back. In order to escape the movement, the seat tube base is fitted into the bottom bracket so that the seat tube mounting part (bottom bracket) of the pedal rotating shaft part can be rotated with a circular outer shape of the outer peripheral part of the bottom bracket that is the pedal rotating shaft part. As a result, the angle pushed forward rotates along the bottom bracket and escapes, so the frame of the rear wheel part can easily escape and absorb the warping forward.

  Although the operation of the system in which two main torsion bar springs are arranged horizontally in parallel has been described, it is also possible to produce a system in which two are installed vertically from the pedal rotating shaft to the front head tube. According to the second embodiment, the head tube is attached to the head tube with a rubber bush so as to have elasticity to disperse and release the vibration shock. Further, if the seat stay is structured to absorb the impact generated from the rear wheel by attaching the shock absorber, the system becomes more effective than the first embodiment. In addition, since each rider has a different weight, he / she attaches a bracket that can reinforce the tension of the sprink bar with a reinforcement bracket so that the tension of the spring of the main frame is increased for those who have a heavy weight. ing. In addition, the assist electric vehicle can be manufactured by the present method, and when this method is adopted, the function of the auxiliary motor and the impact at the time of traveling are absorbed, so that the comfort can be further improved.

The bicycle according to the first and second embodiments of the present invention employs a frame with a special structure in order to make the function of enabling comfortable driving by greatly reducing the vibration shock when driving on the road surface as in the past. And improve comfort during driving. And in the third embodiment of the present application, like a conventional bicycle, two steel pipe pipes are arranged in a triangle on the plane, and the center pipe is seat tube, and the head tube is attached to the apex of the triangle on the front wheel side. The rear wheel hub is arranged at the apex of the opposite triangle, the bottom bracket is arranged at the lower part of the seat tube, the rear suspension is arranged at the upper part as in the second embodiment, and the saddle is installed at the upper part. As in the second embodiment, the seat stay part is mounted with a shock absorber to relieve the vibration shock of the rear wheel hub. As in the second embodiment, the handle post penetrates the head tube and the return spring is attached to the head. It is arranged above and below the tube so that the vibrations of the front wheels are not transmitted to the head tube as in the second embodiment. The The get away Nowa person to relax the impact at the handlebar of the leaf spring is intended to reduce the transmission of vibration.

  The greatest advantage of the bicycle of the present invention is that it is uncomfortable that the impact and vibration from the road surface irregularities and steps are transmitted to the rider through the bicycle frame when driving on a bicycle when driving on a general road etc. This reduces vibration and makes it possible to travel comfortably, and can provide an effect of reducing fatigue even when riding for a long time. Conventional bicycles are closer to the comfort of a mini-bike or motorcycle by mitigating vibration during driving than the air pressure filled in the tube in the tire and the absorption force by the spring under the saddle. . In addition, the pin or nail falling on the road during the bicycle traveling of the present invention is not punctured by being stuck in the tire. Since there is no air in the tube in the tire, there is no need to replenish air regularly, and there is no need to adjust the air pressure, and even if a nail or the like is stuck in the tire during running, puncture does not occur. In this system, the tire is loaded with elastic rubber filler such as gel or polymer synthetic resin agent, and the anti-puncture agent is inserted. Since there is no phenomenon of air escaping, it is convenient because it is only necessary to remove a nail, a pin, etc. that are periodically stuck in the tire by visual inspection.

  Configuration of side view of the first embodiment   Front view of the first embodiment   Front suspension head tube cross section   Sectional drawing of the dashed-dotted line part of FIG.   Exploded view of rear suspension   Spring bar cross section   Side view of the second embodiment   Front view of the second embodiment   Side view of the third embodiment   Front view of the third embodiment   Changing the combination of front suspension and seat stay in the first embodiment   Changing the front suspension combination of the second embodiment   Changing the front suspension combination of the third embodiment   Front view of FIG.

  The shockless bicycle which is the invention of the present application presents examples of three basic structures, each of which presents a suspension device that absorbs vibration shocks in different ways. It is possible to create a unique configuration by combining basic configurations in different ways separately, and it is possible to assemble and assemble the suspension of each element without being bound by the basic configuration described below The configuration is not limited to the example.

  The operation of the shockless bicycle, which is the basic configuration of the first embodiment, will be described with reference to the drawings. FIG. 1 of the present invention is a side view of the system of the first embodiment of the shockless bicycle, and FIG. . (In the figure, the spokes and valves are omitted from the wheels.) The structure of the first embodiment is characterized by two elastic torsion bar springs 10 formed of a main frame 10 formed in a shape unique to the present plan, horizontally to the left and right. It is arranged like the inside, connected and fixed to the head tube 4 of the front wheel, fixed to the lower part of the bottom bracket 11 with the main frame bottom bracket 12, and the rear hub 19 and the seat stay 17 on the rear wheel side together with the main stay 10. When the rider sits down on the saddle during travel, the weight is placed on the center of the torsion bar spring 10 at the position of the bottom bracket 11 via the saddle and the seat tube. When the front and rear wheels move up and down due to vibration, etc., the spring bar of the main frame moves up and down by the reaction and the center of gravity is built up. The front and rear torsion bar springs 10 and the wheels act as a cushion while warping from the position of the bottom bracket, acting as a suspension device, reducing shock vibration from the road surface to the bicycle and reducing discomfort Will do. For this reason, as with conventional bicycles, the shock vibration transmitted to the frame only by the tire pressure and the spring under the saddle was transmitted to the rider as well as the torsion bar spring of the main frame 10 greatly. Will be alleviated. The impact during traveling is also greatly reduced by the action of this suspension device. However, in the present invention, the front suspension 4 and the rear suspension 16 above the seat tube 18 below the saddle are disposed in the head tube 4 of the front wheel. The rear-hub at the time of traveling is driven by the mechanism of rotating the connecting portion of the bottom bracket 11 with the force acting on the seat stay 17 as well as the force acting on the seat stay 17 and the force acting on the seat stay 17 forward. It is possible to alleviate the impact transmitted to the saddle by the structure of the rotary joint portion between the seat tube 18 and the bottom bracket 11 such as the up and down motion impact of the seat 19.

  In this way, the present structure is configured to further reduce the impact during traveling by arranging three relaxation mechanisms on the main frame. The operation of each of the three relaxation devices will be described. The first is that the inside of the head tube 4 in FIG. 1 is as shown in FIG. 3, and the cross section taken along the one-dot chain line in FIG. . As shown in FIG. 4, the outermost part is the head tube 34, and the spline shaft 31 is engaged with the head tube 34. The spline shaft is connected to the front fork 5, and the spline bearing is connected to the handle post 3. When the front fork is pushed up by a step or the like while the bicycle is traveling on a road or the like, the spline shaft pushes up the spline return springs 30 and 36 that push down the spline shaft of the front suspension, and the spline shaft rises without sliding on the upper part of the spline bearing. Does not push up the handle shaft 29. For this reason, no impact is transmitted to the handle held by the rider, and the spline shaft moves up and down inside the spline structure, and the impact can be eliminated within the mechanism by the action of the return spring. The vibration is mitigated in the front suspension 4 without acting directly on the handlebar 1. Because of the spline structure, there are many contact surfaces between metals, and therefore, grease is periodically injected from the grease nipple 29 on the outer surface of the head tube to take measures to prevent wear.

  Next, the shock absorber of the rear suspension 16 on the seat tube 18 under the saddle 15 becomes a sectional view as shown in FIG. 5, and the vibration shock transmitted from the seat tube to the saddle is a coil spring and a shock absorber in the rear suspension. By absorbing the impact thrusting from below by the action of 27, the impact acting on the saddle is alleviated and the impact transmitted by the bicycle is greatly reduced as compared with the conventional bicycle. The passengers who have a weight of 100 kg and those who have a weight of 50 kg naturally have different cushioning effects. Therefore, the weight adjustment screw 20 in FIG. 5 matches the weight of the rider to match the weight of the rider. It is possible to select the optimal comfort with a value that matches the above. (However, the thread of the weight adjusting screw thread 23 is omitted in the figure and is not shown.) And the vertical movement of the rear hub acts on the seat stay 17 and pushes the seat tube forward and the seat tube. The seat tube and saddle are tilted slightly forward and the force acting on the rear hub tilts forward and escapes, acting on the rear hub. This is how the power is relieved. As shown in the cross-sectional view of FIG. 6, the spring bar serving as the main frame may have any shape of a, b, c, and d, depending on the choice of the designer.

  The system of the second embodiment has a mechanism as shown in FIGS. 7 and 8. The section from the bottom bracket 11 to the head tube 4 has two main parts in the vertical direction, and a main frame is formed by the spring bar 10, and the bottom bracket 11 is connected to the rear bracket. Up to the hub 19, the torsion bar spring 38 is horizontally arranged in the same manner as in the first embodiment. The front wheel head tube does not incorporate a suspension as in the first embodiment, and the front fork 5 and the handle post 3 are connected to each other, and are disposed vertically through the head tube 4. The impact generated at the time of traveling transmitted from the front wheels by the action of the return springs 39 disposed above and below the upper part of the handle post is not eliminated by the spline mechanism in the head tube as in the first embodiment. In the case of the conventional handlebar 1, the impact is directly transmitted to the rider's arm, but in the second embodiment of the present invention, several leaf springs 40 are bundled up and down as shown in FIG. The impact that is placed in the state of being pushed up from below is caused by the handlebar moving up and down on both sides in the vertical direction of the leaf spring 40. Vibration is structured to eliminate Te, impact transmitted to Nowa who will be not a big burden small, thus resulting in an impact is alleviated. The rear suspension 16 uses the same suspension as in the first embodiment. The vibration of the vertical movement during the running of the rear main frame 38 from the rear bottom bracket 11 to the rear hub 19 is changed to the seat stay 17 of the first embodiment, and the shock absorber 7 is provided in the second embodiment from the rear hub. It absorbs the transmitted vibrations and so on to alleviate the impact.

  FIG. 9 is a side view and FIG. 10 is a front view of the configuration of the sickless bicycle of the third embodiment. The structure of the frame is the same as that of a conventional bicycle, but the steel pipe pipe triangle (the triangle at the front of the bicycle is slightly deformed because the triangle is a little deformed) is placed around the seat tube 18 with the triangular pipe structure in front and back. doing. The head tube 4 is connected to the front fork 5 and the handle post 3 in the same manner as in the second embodiment, and passes through the head tube 4 so as to be arranged vertically. The impact generated during the travel transmitted from the front wheel by the action of the spring 39 is transmitted to the upper part on the handle post 3 side, and if it is a conventional handlebar, the impact is directly transmitted to the rider's arm. Then, as shown in FIG. 10, the handle bar is arranged with several leaf springs bundled up and down, and the impact pushed up from below causes vibration and the like when the handle bar 1 moves up and down on both sides in the vertical direction of the leaf spring. It has a structure that eliminates and relaxes, and the impact transmitted to the person is small and will not be a heavy burden, thus reducing the impact It will be. The rear suspension 16 disposed between the seat tube 18 and the saddle 15 is disposed in the same manner as in the first and second embodiments. In the drawing, the chain stay 3711 is moved up and down by the vibration of the rear hub 19 from the bottom bracket 11 during traveling, and the outer shape of the bottom bracket 11 is circular, so the chain stay 38 is fitted on the outer periphery thereof, so the vertical movement of the rear hub 19 The movement allows the chain stay 38 to rotate slightly from the bottom bracket. The vertical movement of the rear hub 19 absorbs the vibration shock by the shock absorber 27, and the rear wheel relaxation action is obtained. As described above, the third embodiment constitutes a shockless bicycle having a pipe structure frame similar to that of a conventional bicycle.

  Thus, the combinations of the mitigation devices of the first to third embodiments of the present invention are not limited to the respective embodiments, but the first embodiment and the second embodiment as shown in FIG. 11, FIG. 12, and FIG. For example, FIG. 11 is not limited to each embodiment, and can be freely changed. FIG. 11 shows the seat suspension on the front suspension and the handlebar in the first embodiment. Has changed. In FIG. 12, the front suspension is configured as the front suspension of the first embodiment, and the handle post has the same handle structure as that of the first embodiment. FIG. 13 also employs the same system as the first embodiment for the front suspension and handlebar. In this manner, the designer may configure any various relaxation devices by any combination, and can freely design.

  The structure of the vibration and shock absorption mitigation mechanism when traveling on roads etc. on bicycles of the present application not only allows passengers to travel comfortably, but also measures to solve the puncture problem that is fatal to conventional driving Therefore, when traveling to the destination, it is possible to arrive at the destination on time without accidental stoppage, so that no time loss occurs. In this application system, the front and rear wheels of the conventional pipe structure frame transmit vibrations and shocks generated by steps and irregularities on the road surface to the passengers through the frame, and discomfort is transmitted when the wheel is running in this application system. A suspension system that has a unique action against vertical vibration by incorporating a relaxation device composed of splines and springs into the structure of the main frame, the head tube of the front wheel part and the seat tube part of the saddle under the saddle. It is incorporated and acts to alleviate transmitted vibrations and the like. As shown in the examples, the system is designed to reduce vibrations and vibrations in the various configurations of the present application system, to realize comfortable driving for passengers, and to prevent transmission of vibrations etc. The frequency of use increases because it becomes punkless during traveling and traveling, and if it is equipped with a type of bicycle equipped with an electric auxiliary motor, the range of use in bicycles in mountainous areas and sloped cities will increase, and with a motor It can be expected that an effect comparable to that of a vehicle that replaces the single-vehicle type will be obtained, and because it is human power, it is economical because it eliminates the burden of fuel costs, taxes, etc.

DESCRIPTION OF SYMBOLS 1 Handlebar 21 Weight adjustment instruction mark 2 Handle stem 22 Weight adjustment spring 3 Handle post 23 Weight adjustment moving thread 4 Front suspension (head tube) 24 Main lot 5 Front fork 25 Weight value 6 Tire 26 Bush stay 7 Rim 27 Shock absorber 8 Front hub 28 Rear bar bracket 9 Head tube bracket 29 Grease nipple 10 Main frame (torsion bar) 30 Spline return spring 11 Bottom bracket 31 Spline bearing 12 Main frame bottom bracket 32 Spline shaft 13 Crank 33 Upper support bearing 14 Petal 34 Head tube 15 Saddle 35 Lower support bearing 16 Rear suspension 36 Spline returns Pulling 17 Seat stay 37 Chain stay 18 Seat tube 38 Rear main frame 19 Rear hub 39 Return spring 20 Weight adjustment screw 40 Handlebar sprink

  In recent years, cheap bicycles have been imported, and their use has exploded. The number of bicycle parking lots and accidents have increased, and safety measures have become urgent. More than 180 years have passed since the bicycle was invented, but the basic structure has not changed much and has now reached the present. As is well known, the benefits of bicycles are extremely effective and differ greatly compared to human walking, and their use will continue to contribute greatly to humanity in the future. Bicycles that use electric motors as auxiliary power have also increased in popularity in recent years, and the effects of the auxiliary action are significant in cities with many slopes, and the reduction of human power and comfortable and light driving are realized. However, the utility of bicycles in the current situation is large, but the drawbacks of bicycles are still not so much improved in the past and are the same from the old days. That is, in a general commercial vehicle, there is not much technical progress in terms of vibration and puncture problems during travel. This means that if a puncture occurs during traveling, the puncture cannot be continued unless the puncture is repaired at that time, and the traveling must be stopped and the destination cannot be reached. . In addition, impacts such as vibrations may cause adverse effects such as fatigue accumulation during long-time running.

In general commercial vehicles, tires are fitted into the rim of the wheel and a tube is installed inside, and the inside is filled with air to absorb the impact generated by road surface irregularities using air pressure to absorb the impact. However, it is uncomfortable for the rider who is riding the shock generated at this time, and if there is further relaxation during traveling, comfortable traveling can be realized. Most current commercial vehicles have a structure that absorbs the impact during driving with the tire structure and the spring structure located under the saddle, but this structure has limitations in absorbing vibration and shock. Therefore, there is a need for a system that improves the quality of absorption capacity by other mechanisms. Some parts have been improved and a special structure for absorbing shocks is sold. However, the structure has become complicated and the unit price has increased, resulting in a lack of mass penetration. Is the actual situation. In the present invention, as shown in FIG. 1, a spring bar is arranged and fixed on the main frame constituting the main frame of the bicycle from the front wheel to the rear wheel in parallel with the left and right, and the spring bar of the main frame as shown in FIG. The system of the 2nd example which arranged two front parts of the upper and lower sides, and the system of the 3rd example which arranged the steel pipe hype by special structure like FIG. 9 are shown.

  JP-A-1-105028   JP 2013-86776 A   JP-A-7-228777   Microfilm of Japanese Utility Model Application No. 2-26457 (Japanese Utility Model Application Publication No. 3-118888)

The current ordinary commercial vehicle absorbs shocks and vibrations from the traditional tire tube air pressure and saddle spring structure due to its price. There are limits to getting enough comfort for the person. As is well known, the basic structure of a bicycle is that the front wheel rear wheel is placed on a steel pipe of pipe structure so that two triangles are arranged in a row, and the front hub axle is attached to the center of the front wheel at the front corner of the front part. A rear hub is provided at the tip of the rear triangle, a saddle is attached to the upper part of the joint that becomes the contact point of the front and rear triangles, and the center axis of the chain that rotates the rear wheel at the tip of the lower triangle The bottom bracket, which is the drive shaft, is arranged , the rotating shaft part of the petal is connected to the rear hub via a transmission device such as a chain, and the rider rotates the petal with his feet so that In this structure, the axles of the front and rear wheels and the frame of the pipe structure are integrated, and the vibration and impact from the road surface are constantly transmitted to the entire part of the frame structure. Constant vibrations to Nowa user via the handle and the saddle so that the impact shock or the like that is not absorbed in the spring structure of the pneumatic and saddle bottom in the tire mentioned above will be communicated to Nowa person. Derived from this basic structure, the structure of the current bicycle has changed to a slightly modified structure. In general bicycles, the center part of the pipe part on the upper side of the front triangle falls to the lower part and is connected to the pipe part in the center part of the triangle, so that women can wear skirts. It has a structure that can easily straddle the saddle on the forefoot. The vibration shock transmitted from the road surface is only mitigated by the air pressure in the tire tube of the wheel and the spring body under the saddle, but this is not enough, and it is equipped with further vibration and shock mitigation mechanisms. In order to make such an improvement measure in this plan, it is possible to run lightly by mitigating impact vibration by making a unique action structure with various shock absorbers and special frame structure It is. In addition, current commercial bicycles often puncture when pins or nails falling on the road get stuck in the tires, but at present, there have been no sufficient measures to prevent this problem. The present invention also takes a solution to this problem.

The configuration of the bicycle body of the embodiment of the present application is not a frame configuration in which two sets of triangular pipe steel pipes are combined symmetrically as in the conventional bicycle, but the spring bar that forms the main frame of the bicycle is formed in various shapes. By using shape steel, two rod-like spring bars with a length from the head tube support part of the front wheel to the rear hub support part of the rear wheel are arranged in parallel on the left and right sides, and the front wheel part and the rear wheel hub are placed in front of the bar. A bottom bracket that is a pedal rotation shaft such as a chain that rotates and drives the rear wheel is arranged in the middle part of the spring bar. With the structure that rotates the rear wheels, the seat tube is placed on the top of the bottom bracket that is the pedal and crankshaft mounting shaft. It becomes a structure in which to place the saddle on its upper vibration absorbing relieving device fitted (rear suspension) by spline structure and the combination of the spring of the rolling prevention structure, between the rear wheel hub and the seat tube to deploy the seat stays The triangular shape forms a structure that allows the rider to run safely and strengthens the overall structure of the bicycle, thus driving safely. In FIG. 2 of the cited document 1, a bicycle is shown in which the front wheel part and the rear wheel part are fixed together with a leaf spring in the same manner as in the present application. However, the difference from the present application is that the leaf spring is different in the structure of the cited document 1. Although this is a system in which a single frame is used to form the skeleton of the bicycle, the present application is greatly different in that it is a configuration in which two spring bars are arranged on the left and right. This difference is that if one leaf spring is damaged due to metal fatigue or a defective part during traveling, the front spring and rear wheel will be disassembled when the leaf spring breaks during traveling. It can be assumed that the rider falls over and touches the ground and bruises the head and other parts and seriously damages the human body. It is impossible to assume that this will break at the same time, and if one breaks first, it is possible to detect a sign of any abnormality of the vehicle body at that time, and it is possible to stop the bicycle and take accident prevention measures at that time Therefore, since the present application system can contribute to safety prevention measures, it is a significant feature that important safety measures are taken. .

The front wheel head tube of the present invention has a structure in which only two spring bars are connected so that a top tube does not exist like a normal general commercial bicycle , and two spring bars arranged in parallel on the left and right are conventional top tubes. And the down tube. The front wheel head tube has a built-in spline structure vibration absorption mitigation device (front suspension) that absorbs shocks in two stages and acts as a vibration impact mitigation device for the front wheel vertical movement during running. Due to shock vibration from the road surface, the two springs act and absorb in two stages according to the strength of the shock, and are pushed up from the front wheel to the front fork and relaxed by the front suspension in this head tube and are moved to the handlebar It eliminates discomfort such as vibration shock given to the rider by eliminating the transmitted impact.

Before SL is the rear wheel side of the spring bar supporting the rear wheel portion connected to the rear wheel hub, the weight fraction of the weight of Nowa's bottom bracket is deployed to an intermediate portion of the spring bar is through this seat tube from the saddle You will get on the bottom bracket. As a result, the middle point of the spring bar sinks by the weight of the bicycle. By using a spring bar that matches the weight of the rider, when the front wheel rises when riding on a step on the road surface, the middle point of the spring bar is weighted when the front wheel rises. by but it falls slightly warped downward, but impact transmitted to the front wheels from the road surface is relieved by resilient by spring bar is transmitted from the saddles to Nowa user via the seat tube to the spring bar is deformed prior this time In a bicycle, only the relaxation effect of the tire air pressure cushion and the expansion and contraction of the saddle spring are only relaxed, but in the structure according to the present invention, the transmitted impact is also reduced by the spring bar warping.
In reference document 2, paragraphs 0024 and FIGS. 2 and 3 are provided with two elastic rods 30A. However, as in the method of the present application, only two are used to attach the bottom bracket or seat tube from the front wheel head tube and fix it to the rear wheel hub. In the cited document 2 instead of the connection method, the front under frame 6 and the rear under frame 8 are connected to the lower part to form a solid structure. However, in the present application, only two spring bars are used, and the same firmness as in the cited document 2 is maintained, and there are effects such as reduction of members and a reduction in manufacturing price compared to the cited document 2, and much more advanced than the cited document 2. Sex is seen. The constituent elements of the elastic frame 30 in the cited document 2 are a part of the frame structure, but the constituent elements in the present application are main frames, and the main feature is that they are extremely simple.

In the first implementation system, the vibration shock when the front wheel rides on the road step or the like due to the relaxation action of the spring bar of the main frame is affected by the action of the spline part (front suspension) in the front wheel head tube and the suspension of the seat pillar part ( The shock from the front wheels is mitigated by the action of the spring on the spline bearing and spline shaft of the rear suspension. Similarly, if the rear wheel also travels in a straight line, the rear wheel also rides on the rear wheel from the back of the front wheel, and the vibration shock repeats in the same way as the front wheel. The spring bar on the rear wheel hub also repeats a slight warping while traveling from the pedal rotation shaft of the main frame. Since the rear spring bar is located on the upper part of the pedal rotation shaft (bottom bracket), the seat stay is pushed forward by the distance that the frame stays back toward the seat tube when the rear wheel frame is bent back. In order to escape the movement, the seat tube base is fitted into the bottom bracket so that the seat tube mounting part (bottom bracket) of the pedal rotating shaft part can be rotated with a circular outer shape of the outer peripheral part of the bottom bracket that is the pedal rotating shaft part. As a result, the angle pushed forward rotates along the bottom bracket and escapes, so that the frame of the rear wheel can easily escape and absorb the warped forward.
In Cited Document 3, a shock absorber composed of a spline bearing and a spring shaft similar to the present application as shown in FIG. 6 is disposed in the head pipe (head tube), but this is generated by a single spring. The shock is reduced by a single spring and is roughly compared to the method of reducing the impact by the action of two springs as in the present application. However, in this method, the generated shock is buffered in two stages. Therefore, a softer buffering effect than that of the cited document 3 is obtained , and there is an inventive step than the cited document 3. In the method of the present application, the primary return spring of the front suspension reduces the impact against minor vibrations during traveling, but the secondary return spring also acts in the event of a large impact, contributing to the reduction of the impact, and mitigating in two stages. There is clearly an inventive step because the action will work. Further, a cushioning device using a coil spring 3 is described in the rising pipe 2 shown in FIGS. 1 and 4 of the cited document 4, but when this method is compared with the rear suspension of the present method, the method of the cited document 4 is simply a spring rising pipe. In this method, the weight of the rider is adjusted by rotating the weight adjustment screw 20 of the rear suspension shown in FIG. 5 according to the weight of the rider. When traveling according to the numerical value 25, it is possible to travel in the most comfortable buffering state. In addition, since the hydraulic shock absorber 27 is built in, it is possible to obtain a result that the comfort is further improved, so that the buffering effect improved from that of the cited document 4 can be obtained.

Although there has been explained the comparative difference between the operation action in the system in which two spring bars, which are the main frames of the bicycle in this application system, are arranged in parallel from the head tube to the rear wheel hub and similar techniques already disclosed. The inventive step of the present invention is clear. In the first embodiment, paragraph 0008, the base of the seat tube is fitted into the bottom bracket so that the outer shape of the outer peripheral mounting portion of the bottom bracket can be rotated in a circle, so that the angle pushed forward rotates along the bottom bracket. If the seat stay of FIG. 7 is attached to the shock absorber 27 to absorb the impact generated from the rear wheel, the first embodiment is more effective. Become. In addition, even the electrically assisted bicycle can be manufactured according to the proposed method, and when this method is adopted, the function of the auxiliary motor and the impact at the time of traveling are absorbed, so that the comfort can be further improved.

The greatest feature of the present invention is that the front bar and the rear wheel are connected with two spring pars, and the seat tube and the seat stay are arranged on the bottom bracket so that the impact transmitted to the vehicle body from the road surface during traveling is maintained while maintaining the strength of the entire bicycle. In order to provide a more comfortable ride, the refraction restoring action is used as a buffering action. The head suspension is equipped with a front suspension and a rear suspension equipped with a weight adjustment screw and a hydraulic shock absorber at the top of the seat tube. It has a feature that achieves comfortable driving by mitigating shock, vibration, etc. that were buffered only by the air pressure in the tire and the spring under the saddle in the conventional popular commercial bicycle is there.

The greatest advantage of the bicycle of the present invention is that it is uncomfortable that the bumps and bumps on the road surface and the shocks and vibrations from the steps when riding on a general road are transmitted to the rider via the bicycle frame. This reduces vibration and makes it possible to travel comfortably, and can provide an effect of reducing fatigue even when riding for a long time.
In the city-cycle car or the bicycle called Mamachari, which is the most economical and popular bicycle in the market at present, the conventional bicycle is based on the air pressure filled in the tube in the tire and the spring under the saddle. The vibration during driving is further relaxed rather than the absorption capacity of the motorcycle, and it is close to the comfort of a mini-bike or motorcycle. Further, in the bicycle of the present invention, pins and nails that are falling on the road during traveling do not puncture the tire. Such It Since the tube within the tire no air periodically without the need replenishing air blowout does not occur because the nail or the like during running adjustment of the air pressure becomes unnecessary is never passing air be stuck in the tire In a system called a punctureless tire, an elastic rubber filler such as gel or a polymer synthetic resin agent is loaded into the tire and an anti-puncture agent is inserted, so pins and nails stick into the tire. However, since there is no phenomenon of air escaping as in the prior art, it is convenient because it is only necessary to remove a nail, a pin, etc. that are periodically stuck in the tire by visual inspection.

  Configuration of side view of the first embodiment   Front view of the first embodiment   Front suspension head tube cross section   Sectional drawing of the dashed-dotted line part of FIG. 3 i   Rear suspension diagram   Spring bar cross section   Side view of the second embodiment   Front view of the second embodiment   Side view of the third embodiment   Front view of the third embodiment   Changing the combination of front suspension and seat stay in the first embodiment   Changing the front suspension combination of the second embodiment   Changing the front suspension combination of the third embodiment   Front view of FIG.

  The shockless bicycle which is the invention of the present application presents examples of three basic structures, each of which presents a suspension device that absorbs vibration shocks in different ways. It is possible to create a unique configuration by combining basic configurations in different ways separately, and it is possible to assemble and assemble the suspension of each element without being bound by the basic configuration described below The configuration is not limited to the example.

The operation of the shockless bicycle, which is the basic configuration of the first embodiment, will be described with reference to the drawings. FIG. 1 of the present invention is a side view of the system of the first embodiment of the shockless bicycle, and FIG. . (Spokes, valves, etc. are omitted from the wheel in the figure.) The feature of the structure of Example 1 is that two spring bars 10 having elasticity formed in a shape unique to the present plan are parallel to the left and right in the figure. Are connected to the head tube 4 of the front wheel, fixed to the lower part of the bottom bracket 11 with the main frame bottom bracket 12, and further connected to the rear hub 19 and the seat stay 17 on the rear wheel side to connect the spring bar 10 of rigidly fixed at the end portion, will be the center of gravity is applied to the central portion of the spring bar 10 in the position of the bottom bracket 11 via the Nowa's multiply the waist of the saddle when the weight saddle and the seat tube during running, front wheels during running, the rear wheels as a base point a position of the bottom bracket spring bar 10 when vertical movement is taking the center of gravity and the vertical movement in the recoil vibration Spring bar 10 while the front and rear wheels warping acts as a cushion, responsible for acting as a suspension system, will reduce discomfort and reduce the impact vibration from the road surface to Nowa car. For this reason, the impact of vibrations transmitted to the frame by only the tire pressure and the spring under the saddle, as in the conventional bicycle, was transmitted to the rider as a result of the action of the spring bar 10 to be greatly mitigated. become. The impact of the spring bar 10 only by the suspension device is greatly reduced, but in the present invention, the front suspension and the seat suspension 18 at the bottom of the saddle are further provided with the rear suspension 16 in the front tube 4 of the front wheel. The arrangement and the mechanism for rotating the connecting portion of the bottom bracket 11 to the force that pushes the seat stay 17 forward, the force acting on the seat stay 17 also to the vibration of the vertical movement acting on the rear hub 19 of the spring bar 10 Thus, it is possible to mitigate the impact transmitted to the saddle by the structure of the rotary joint portion of the seat tube 18 and the bottom bracket 11 such as the impact of the vertical movement of the rear hub 19 during traveling.

As described above, the present invention is configured in such a structure that the three relaxing mechanisms are arranged on the spring bar 10 serving as the main frame to further reduce the impact during traveling. The operation of each of the three relaxation devices will be described. The first is that the front suspension is arranged inside the head tube 4 of FIG. 1 as shown in FIG. A cross section of the chain line is shown in FIG. As shown in FIG. 4, the outermost part is the head tube 34, and the spline shaft 31 is engaged with the head tube 34. The spline shaft is connected to the front fork 5, and the spline bearing is connected to the handle post 3. When the front fork is pushed up by a step or the like while the bicycle is traveling on a road or the like, the spline shaft pushes up the spline primary return spring 36 that pushes down the spline shaft of the front suspension , and the secondary return spring 30 so that the spline shaft is positioned above the spline bearing. Although it rises while sliding, it does not push up the handle post 3 . For this reason, no impact is transmitted to the handle held by the rider, and the spline shaft moves up and down inside the spline structure, and the impact can be eliminated within the mechanism by the action of the return spring. The vibration is mitigated in the front suspension 4 without acting directly on the handlebar 1. Because of the spline structure, there are many contact surfaces between metals, and therefore, grease is periodically injected from the grease nipple 29 on the outer surface of the head tube to take measures to prevent wear. It will alleviate absorb the impact acting Sekonda Lee spring 30 when the shock from mild road mitigating the impact performs a buffering action in the action of the primary return spring 36 but which is more impact acting on the front suspension . This function is a major feature of the front suspension of the present application and is a function having an unprecedented inventive step.

Next, the shock absorber of the rear suspension 16 on the seat tube 18 under the saddle 15 becomes a sectional view as shown in FIG. 5, and the vibration shock transmitted from the seat tube to the saddle is a coil spring and a shock absorber in the rear suspension. By absorbing the impact thrusting from below by the action of 27, the impact acting on the saddle is alleviated, and the impact transmitted by the rider is greatly reduced as compared with the conventional bicycle. Rider to suit the person and weight person and in Nowa's body weight weight adjusting screw 20 in FIG. 5 in accordance with the body weight is different naturally cushioning effect of 50kg body weight 100 kg, the Nowa's body weight adjusted numerical 25 It is possible to select the optimal comfort with a value that matches the weight. (However, the thread of the weight adjusting screw thread 23 is omitted in the figure and is not shown.) And the vertical movement of the rear hub acts on the seat stay 17 and pushes the seat tube forward and the seat tube. The seat tube and saddle are tilted slightly forward and the force acting on the rear hub tilts forward and escapes, acting on the rear hub. This is how the power is relieved. As shown in the cross-sectional view of FIG. 6, the spring bar serving as the main frame may have any shape of a, b, c, and d, depending on the choice of the designer. However, the technology in which the joint between the seat tube and the bottom bracket rotates is well known, and a designer who manufactures the shockless bicycle can use the hydraulic shock absorber 27 shown in FIG. Adoption is also an option.

The system of the second embodiment has a mechanism as shown in FIGS. 7 and 8. The section from the bottom bracket 11 to the head tube 4 has two main parts in the vertical direction, and a main frame is formed by the spring bar 10, and the bottom bracket 11 is connected to the rear bracket. Up to the hub 19, the spring bar 10 is arranged parallel to the left and right and up and down as in the first embodiment. The front wheel head tube does not incorporate a suspension as in the first embodiment, and the front fork 5 and the handle post 3 are connected to each other, and are disposed vertically through the head tube 4. The impact generated at the time of traveling transmitted from the front wheels by the action of the return springs 39 disposed above and below the upper part of the handle post is not eliminated by the spline mechanism in the head tube as in the first embodiment. In the case of the conventional handlebar 1, the impact is directly transmitted to the rider's arm, but in the second embodiment of the present invention, several leaf springs 40 are bundled up and down as shown in FIG. The impact that is placed in the state of being pushed up from below is caused by the handlebar moving up and down on both sides in the vertical direction of the leaf spring 40. Vibration is structured to eliminate Te, impact transmitted to Nowa who will be not a big burden small, thus resulting in an impact is alleviated. The rear suspension 16c uses the same suspension as in the first embodiment. The vibration of the vertical movement during traveling of the rear main frame 38 from the rear bottom bracket 11 to the rear hub 19 is changed to the seat stay 17 of the first embodiment, and in the second embodiment, a hydraulic shock absorber 27 is provided and the rear hub. The vibration transmitted from 19 will be absorbed and the impact will be reduced. Since the second embodiment also includes a part of publicly known technology, it can be considered that the design manufacturer partially selects and adopts these technologies as needed together with the following third embodiment.

FIG. 9 is a side view and FIG. 10 is a front view of the configuration of the sickless bicycle of the third embodiment. The structure of the frame is the same as that of a conventional bicycle, but the steel pipe pipe triangle (the triangle at the front of the bicycle is slightly deformed because the triangle is a little deformed) is placed around the seat tube 18 with the triangular pipe structure in front and back. doing. The head tube 4 is connected to the front fork 5 and the handle post 3 in the same manner as in the second embodiment, and passes through the head tube 4 so as to be arranged vertically. The impact generated during the travel transmitted from the front wheel by the action of the spring 39 is transmitted to the upper part on the handle post 3 side, and if it is a conventional handlebar, the impact is directly transmitted to the rider's arm. Then, as shown in FIG. 10, the handle bar is arranged with several leaf springs bundled up and down, and the impact pushed up from below causes vibration and the like when the handle bar 1 moves up and down on both sides in the vertical direction of the leaf spring. It has a structure that eliminates and relaxes, and the impact transmitted to the person is small and will not be a heavy burden, thus reducing the impact It will be. The rear suspension 16 disposed between the seat tube 18 and the saddle 15 is disposed in the same manner as in the first and second embodiments. In the drawing, the chain stay 3711 is moved up and down by the vibration of the rear hub 19 from the bottom bracket 11 during traveling, and the outer shape of the bottom bracket 11 is circular, so the chain stay 38 is fitted on the outer periphery thereof, so the vertical movement of the rear hub 19 The movement allows the seat tube 18 to rotate slightly from the bottom bracket in the forward direction of the bicycle . The vertical movement of the rear hub 19 absorbs the vibration shock by the shock absorber 27, and the rear wheel relaxation action is obtained. As described above, the third embodiment constitutes a shockless bicycle having a pipe structure frame similar to that of a conventional bicycle.

  Thus, the combinations of the mitigation devices of the first to third embodiments of the present invention are not limited to the respective embodiments, but the first embodiment and the second embodiment as shown in FIG. 11, FIG. 12, and FIG. For example, FIG. 11 is not limited to each embodiment, and can be freely changed. FIG. 11 shows the seat suspension on the front suspension and the handlebar in the first embodiment. Has changed. In FIG. 12, the front suspension is configured as the front suspension of the first embodiment, and the handle post has the same handle structure as that of the first embodiment. FIG. 13 also employs the same system as the first embodiment for the front suspension and handlebar. In this manner, the designer may configure any various relaxation devices by any combination, and can freely design.

  The structure of the vibration and shock absorption mitigation mechanism when traveling on roads etc. on bicycles of the present application not only allows passengers to travel comfortably, but also measures to solve the puncture problem that is fatal to conventional driving Therefore, when traveling to the destination, it is possible to arrive at the destination on time without accidental stoppage, so that no time loss occurs. In this application system, the front and rear wheels of the conventional pipe structure frame transmit vibrations and shocks generated by steps and irregularities on the road surface to the passengers through the frame, and discomfort is transmitted when the wheel is running in this application system. A suspension system that has a unique action against vertical vibration by incorporating a relaxation device composed of splines and springs into the structure of the main frame, the head tube of the front wheel part and the seat tube part of the saddle under the saddle. It is incorporated and acts to alleviate transmitted vibrations and the like. As shown in the examples, the system is designed to reduce vibrations and vibrations in the various configurations of the present application system, to realize comfortable driving for passengers, and to prevent transmission of vibrations etc. The frequency of use increases because it becomes punkless during traveling and traveling, and if it is equipped with a type of bicycle equipped with an electric auxiliary motor, the range of use in bicycles in mountainous areas and sloped cities will increase, and with a motor It can be expected that an effect comparable to that of a vehicle that replaces the single-vehicle type will be obtained, and because it is human power, it is economical because it eliminates the burden of fuel costs, taxes, etc.

DESCRIPTION OF SYMBOLS 1 Handlebar 21 Weight adjustment instruction mark 2 Handle stem 22 Weight adjustment spring 3 Handle post 23 Weight adjustment moving thread 4 Head tube 24 Main lot 5 Front fork 25 Weight value 6 Tire 26 Bush stay 7 Rim 27 Hydraulic type shock absorber 8 Front hub 28 Rear bar bracket 9 Head tube bracket 29 Grease nipple 10 Spring bar 30 Secondary return spring 11 Bottom bracket 31 Spline bearing 12 Main frame bottom bracket 32 Spline shaft 13 Crank 33 Upper support bearing 14 Petal 34 Head tube 15 Saddle 35 Lower support bearing 16 Rear suspension 36 Primary return spring 17 Seat stay 37 Chainstay 18 seat tube 38 the rear main frame 19 Rear - hub 39 return spring 20 weight adjustment screw 40 Handle Bath purine grayed

Claims (3)

  Two torsion bar springs, which form a main frame with various cross-sectional shapes from the front wheel head tube to the rear wheel hub, are arranged horizontally on the left and right, and the bottom bracket with the seat tube connected to the middle part and the previous main frame are the main frame bottom bracket. The suspension is built in the head tube using the repulsive force of the spline shaft, spline shaft and spring, and the mitigation device that cuts off the impact transmitted from the front wheel to the handlebar is formed. In the first half of the seat tube, a relaxation device equipped with a spring and anti-rotation mechanism is installed, and a saddle is installed on the top. The vertical movement of the rear wheel hub uses the bottom bracket as a fulcrum and the seat tube moves slightly from the bottom bracket. Shockless bicycle that can rotate Structure.   As in the first aspect, the torsion bar spring serving as the main frame is arranged between the front wheel and the rear wheel, and two head tubes are arranged vertically from the bottom bracket. A structure that moves up and down due to vibration against the spring force, and a structure that binds several leaf springs to the handle post and a structure that relieves shock from the front wheels. A suspension similar to claim 1 is mounted on the seat tube. The structure of a shockless bicycle that is configured to place a shock absorber on the seat stay for vertical movement of the rear wheel hub.   Claim 2 is used for mitigating the impact of the vertical movement of the rear wheel hub on the head tube and seat tube by using a steel pipe pipe symmetrically in the shape of a triangle as in the conventional bicycle and arranging the front wheel rear wheel. Structure of shockless bicycle with the same arrangement of suspension system

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