TW201402386A - Bicycle frame structure featuring adjustable frame length and angle - Google Patents

Abstract

Disclosed is a bicycle frame structure featuring adjustable frame length and angle, comprising: a bottom bracket for receiving pedals coupled thereto; a seat tube connected with the bottom bracket and extending upwardly; a rear fork rod assembly connected with the seat tube and the bottom bracket and extending backwardly; a non-horizontal retractable tube assembly, which is composed of a first tubular member and a second tubular member that can be relatively adjusted for extension and retraction and selectively change the relative distance between the first tubular member and the second tubular member to change a relative angle between frame tubes of the bicycle for use with different riding modes, wherein the second tubular member is connected to the seat tube and extends upwardly and forwardly; at least one positioning device for fixing the first tubular member and the second tubular member at a fixed position; a head tube connected to the first tubular member and extending downwardly and forwardly; a front fork rod pivoted in the head tube and extending downwardly; and at least a support tube connected between the seat tube and the second tubular member. The bicycle frame structure can be used with the rider's height and riding mode to carry out, for example, step-less adjustments of center distance of the front or rear wheels, horizontal distance between the seat tube and head tube, tilt angle of the seat tube, and tilt angle of the front fork rod.

Description

Bicycle frame structure with adjustable frame length and angle

The invention relates to a bicycle frame structure capable of adjusting the length and angle of the frame, in particular to a stepless adjustment of the height and the riding mode of the rider, for example, the front and rear wheelbases, the seat tube and the front tube Bicycle frame structure such as horizontal distance, front fork tilt angle and seat tube tilt angle.

The bicycle frame structure mainly comprises: a five-way pipe for the foot pedal; a seat pipe connected to the five-way pipe and extending upward; one connected to the seat pipe and the five-way pipe and extending backward a rear fork rod group; a front head tube; a front fork rod pivotally connected to the head tube and extending downward; and an upper tube and a lower tube connecting the seat tube and the front tube. Other accessories of the bicycle include: a rear wheel pivotally connected to the rear fork bar group; a front wheel pivotally connected to the front fork bar; a seat pad riser and a seat pad connected to the seat tube and extending upward; a handle riser and a handlebar pivotally connected to the front tube and extending upwardly, the handle riser and the front fork have an interlocking relationship, and the riding direction of the front wheel can be controlled; and the pedal can be driven by the pedal And transmit power to the sprocket drive set of the rear wheel (or front wheel); and a brake device.

Bicycles are suitable for riders of different heights (such as strollers, youth cars, carts, etc.) and different riding modes (such as racing cars, city cars, off-road vehicles, etc.), and in the frame of their frame structure The distance between the pipes and the inclination angle have different setting modes, such as the front and rear wheelbases, the horizontal distance between the seat tube and the front tube, the inclination angle of the seat tube and the inclination angle of the front fork, etc., which need to match different types of vehicles. , make different settings. Here are a few examples to illustrate: the difference between a baby carriage, a youth car, and a large wheeled car is different from the wheel diameter. In addition, the upper tube distance and the setting of the front and rear wheelbases are also different. Generally speaking, the distance between the upper tube of the baby carriage and the youth car and the wheelbase of the front and rear wheels are relatively short. The upper pipe distance of the large wheeled car and the wheelbase of the front and rear wheels are longer, so as to adapt to the riding of people with higher height. .

Vehicles with a tilt angle of the seat tube and a large angle of inclination of the front fork (such as racing cars and off-road vehicles) are suitable for high-speed riding in the suburbs. In this case, a larger seat tube angle is required (for example, the speed of the seat tube is set to 73-75 degrees) to facilitate the rider's pedaling force. And a large front fork forward tilt angle (for example, the front fork angle of the racing car is set to 73-75 degrees) for more sensitive handling. At the same time, in order to ride at high speed and to facilitate the pedaling force, it is necessary to have a long seat tube to the handlebar distance, so that the rider can lean over, on the one hand, reduce the wind resistance, on the one hand, it is beneficial to step on the force. However, when you ride, you have to lean over. It is only suitable for more professional people. Most people will feel tired and less used to it. Therefore, it is less suitable for urban low-speed leisure riding style.

Vehicles with a small inclination angle of the seat tube and a small inclination angle of the front fork (such as a city car) are suitable for the low-speed riding mode of the city car in the metropolitan area. The ride of the city car is mainly leisure, the speed is not fast, and the comfort is required. Therefore, the distance between the seat tube and the handlebar is short, so that the rider can ride up straight and is not easy to fatigue for the average person. The front fork tilt angle and the seat tube angle are usually set to 69-71 degrees. This smaller front fork forward tilt angle and seat tube angle are not conducive to the pedaling force, but can disperse the ground rebound vibration, so Comfort is better. However, this smaller seat tube inclination angle and the angle of the front fork lever are not conducive to high-speed driving, and are not conducive to climbing.

The horizontal distance between the seat tube and the front tube (hereinafter referred to as the upper tube distance) should be different depending on the height of different people. The taller person, the hand and the foot are longer, so it takes a longer time. Upper tube distance. In addition, the upper tube distance, the seat tube tilt angle and the front fork tilt angle should also be slightly different with different riding modes. In the high-speed riding mode, a longer front and rear axles are required. The distance from the upper tube or the upper tube allows the rider to sprint and lower the wind resistance; at the same time, the larger seat tube tilt angle makes the rider's foot force more efficient. When riding at low speeds in the city, you need a shorter upper tube distance to allow the rider to stand up. Comfortable ride, while the smaller seat tube tilt angle and front fork tilt angle reduce vibration from the ground.

Different riding positions (dive and straight) and the matching handlebars (such as sports car handles and straight handles) will require different upper tube distances.

In general, the handlebars are: flat handles for mountain bikes, curved handles for sports cars, and curved handles for ladies' vehicles. Regardless of which handle, there are different back bend angles. Therefore, the selection of different handlebars will inevitably affect the horizontal distance of the upper pipe. Since the general frame has been welded and formed, the horizontal distance of the upper pipe has been fixed. Therefore, when the rider wants to replace the different handlebars arbitrarily, Will make the horizontal distance of the upper tube too long or too short, causing the rider to feel unsmooth. For example, when the flat handle is changed into a sports car bend, the horizontal distance of the upper pipe becomes too long, the rider has to lower the ride, and the ride center of gravity is excessively moved forward, which is easy to cause the front roll; otherwise, the sports car When the bending handle is changed to a flat handle, the horizontal distance of the upper tube becomes too short, and the rider cannot ride in a posture of leaning over, lowering the wind resistance, and the pedaling efficiency is lowered, and the high-speed riding cannot be performed.

In this case, since the horizontal distance of the upper tube can be adjusted, it can be arbitrarily selected with various handles according to the rider's personal preference. With the change of the seat tube angle and the head tube tilt angle, various ride feelings can be experienced. You can also find the most comfortable combination for everyone.

From the above several examples, it can be seen that the distance between the frame tubes of the bicycle frame structure and the inclination angle thereof are differently set according to the riders of different heights and different riding modes. However, the frame structure of the bicycle is fixed, and the size of the frame is fixed after the welding is completed. The consumer can't change it. No matter the size is not suitable, it can only bend the existing frame size, or choose shorter or longer. The head of the car (connecting the handlebars and the device above the front fork standpipe), however, the replacement length of this car head is limited, especially for taller people, if the car head is lengthened in order to increase the upper pipe distance, It will make the center of gravity of the ride more forward. When going downhill or emergency braking, it is extremely easy to roll forward and affect the safety of driving. because Therefore, an unsuitable bicycle frame rides for a long time, often causing sports injuries, back pain, miserable, and thus loses confidence in riding a bicycle. Of course, the frame structure of the bicycle is not compatible with different riding environments and riding modes, and the frame distance and the tilt angle of the fixed-size conventional bicycle frame structure are reset.

The inventor of the present application applied for the patents of the Republic of China No. 091218684 and No. 092210060, respectively, which provide a telescopic bicycle, the main technical feature of which is to make the upper tube of the bicycle into a structure for telescopically adjusting the length of the upper tube, and the main purpose of the invention is The overall length of the bicycle can be shortened when not riding, so as to reduce the space occupied by the collection. Of course, when adjusting the length of the upper tube, the above-mentioned telescopic bicycle can also relatively adjust the front and rear wheelbases and the horizontal distance between the seat tube and the front tube to suit people of different heights. However, when the telescopic tube is contracted, in order to avoid the rear wheel, the telescopic tube can only be designed horizontally. Therefore, when adjusting the length of the upper tube, the forward tilt angle of the front fork and the tilt angle of the seat tube are substantially the same, which cannot be matched. The wheelbase changes and the tilt angle thereof is adjusted accordingly; so that when the wheelbase is shortened, there is a problem that it is easy to roll forward when the steep slope is steep, and the stability is poor.

There is also a conventional telescopic bicycle structure, which is mainly used for welding a conventional bicycle to an upper tube between a front tube and a seat tube, and is cut into two-stage upper tubes which are mutually retractable and slidable, and welded in a horizontal manner. On the frame, use a tightening bolt to position it tightly. The disadvantage is that when the two-stage horizontal upper tube is telescoped, only the front and rear track distances can be adjusted, and the angles of the seat tube and the front fork tube cannot be changed, and the different riding modes cannot be satisfied; and only one pressing bolt is used for locking. Forming a single-point locking state not only causes the frame structure to be unstable, but also the locking point becomes a point, and the radial component force generated during riding causes the two-stage upper tube to yaw to the left and right. A relative torsional motion is generated between the upper tubes, which causes the knight to be unable to maintain a balance when riding a bicycle, thereby causing problems of riding difficulties or even accidental crashes.

The structure of the above two conventional retractable bicycles is such that the adjustable telescopic tube is arranged on the horizontal upper tube, which results in a higher height of the frame and the upper tube, which is disadvantageous for the woman to get on and off the vehicle.

In general, the horizontal distance between the upper tube of the bicycle head tube and the seat tube and the relative angle between the frame tubes (including the angle of inclination of the seat tube and the forward tilt angle of the front tube) are related to the riding comfort and the pedaling efficiency. good.

Horizontal distance between the front tube and the seat tube: Different heights, the horizontal distance between the front tube and the seat tube must be different. When the height is short, the horizontal distance between the front tube and the seat tube is short. On the contrary, when the height is high, the horizontal distance between the front tube and the seat tube is longer. In addition, in the urban leisure low-speed riding mode, the emphasis is on comfort. Therefore, the horizontal distance between the shorter head tube and the seat tube can make the rider's straight body ride more comfortable. On the other hand, in the high-speed cycling mode, the speed and the pedaling efficiency are mainly used. Therefore, the horizontal distance between the longer head pipe and the seat tube allows the rider to lean down and reduce the wind resistance.

Relative angle of each frame tube: (including the angle of inclination of the seat tube and the forward tilt angle of the front tube)

In the urban leisure low-speed riding mode, the emphasis is on comfort, so the seat tube inclination angle and the head tube forward angle are small. The smaller seat tube inclination angle and the forward tilt angle of the front tube can effectively disperse and reduce the vibration rebound from the ground, making it more comfortable when riding a bicycle. Although the seat tube inclination angle is small, it is not conducive to pedaling efficiency, but the urban leisure riding mode setting is mainly based on low speed.

When the high-speed sports car mode is required, the speed and the pedaling efficiency are the main points, so the seat pipe inclination angle and the front pipe inclination angle are large. The large inclination angle of the seat tube is beneficial to the foot force, which allows the rider to pedal the pedal efficiently and pursue high-speed riding. The greater forward tilt angle of the front tube is beneficial to the rider's better handling.

The object of the present invention is to provide a bicycle frame structure capable of adjusting the length and angle of the frame, which can be matched with the rider's height and riding mode, for example, the front and rear wheelbases, the horizontal distance between the seat tube and the front tube. , seat tube tilt angle and front fork tilt angle Wait for a stepless adjustment.

Another object of the present invention is to enable a general cyclist to experience different riding modes on the same bicycle and increase the fun of riding a bicycle. You can also find out the most comfortable frame geometry for everyone and enjoy the fun of cycling with the rider's personal preferences.

Another object of the present invention is to provide a bicycle frame structure capable of adjusting the length and angle of the frame, which can meet the same vehicle and can be gradually adjusted to the most suitable size as the child grows up, thereby reducing the number of children who need to change the car because of growing up. The number of times, resulting in a waste of resources. At the same time, depending on personal preference, the long and short wheelbase and the seat tube and the forward tilt angle of the front fork can be adjusted to experience different riding modes.

Another object of the present invention is to enable a general bicycle rider to select a variety of different styles of handlebars according to the rider's personal preference, and to vary the seat tube angle and the change of the head tube front fork angle to experience various differences. The riding feel can also find the most comfortable combination for everyone.

Another object of the present invention is to provide a bicycle frame structure capable of adjusting the length and angle of the frame, which can adjust the seat tube at the same time while adjusting the front and rear wheelbase distances, the horizontal distance between the seat tube and the front tube. Tilt angle and tilt angle of the front fork to match different riding modes such as: racing car high speed mode or city car low speed leisure mode. When the distance between the seat tube and the front tube is increased, the inclination angle of the seat tube and the inclination angle of the front fork rod become larger, which is convenient for the rider to lean over to reduce the wind resistance, and is advantageous for stepping on the force and maintaining a certain degree. Control flexibility; when the distance between the seat tube and the front tube is shortened, the inclination angle of the seat tube and the inclination angle of the front fork become smaller, which makes it easier for the rider to stand up and improve the riding comfort and the steep slope or It is easy to roll over during emergency braking.

A further object of the present invention is to provide a bicycle frame structure capable of adjusting the length and angle of the frame, in addition to reducing the height of the frame and the seat cushion, and the height of the upper tube can also be lower, thereby facilitating the female body. Or children can get on and off very conveniently.

Another object of the present invention is to provide an adjustable frame length and angle. The bicycle frame structure is provided with at least one positioning device having an anti-twist function, which can be used not only to lock the first pipe member and the second pipe member which are mutually sleeved, but also the radial component force when the knight steps on the foot pedal. It will not be directly transmitted to the positioning device, and the anti-twist function of the positioning device can still be ensured after long-term riding. In one embodiment of the positioning device, the technical means of lateral locking is adopted, and the propulsion device for the user to operate is located on the side of the frame structure, and the user does not need to squat operation when operating, and the operation is convenient and time-saving.

In general, when producing high-end vehicles, or hand-built bicycles, the same model will have 3-5 different sizes and can be purchased by consumers of different sizes. However, in this way, producers must produce many at the same time. Different sizes cause troubles in stock preparation, welding molds, and storage, which inevitably increases manufacturing costs and causes inconvenience in production. Another object of the present invention is to provide a bicycle frame structure that can be adjusted to the length and angle of the frame that can be accommodated by consumers of different heights in a single size, and can effectively solve the above problems.

The bicycle frame structure capable of achieving the frame length and angle of the above-mentioned invention includes: a five-way pipe for connecting a pedal; a seat pipe connected to the five-way pipe and extending upward; a rear fork rod group respectively connected to the seat tube and the five-way tube and extending backward; a non-horizontal telescopic tube assembly is composed of a first tube member and a second tube member which can be adjusted by relative expansion and contraction, and Selectively changing the relative distance between the first tube member and the second tube member to change the relative angle between the bicycle frame tubes, wherein the second tube member is coupled to the seat tube and extends forward and upward; at least one positioning device is provided for The first tube member and the second tube member are locked in a fixed position; a head tube connected to the first tube member and extending forward and downward; and a front fork pivotally extending in the head tube and extending downward Rod.

In a preferred embodiment, there is further included at least one support tube connected between the seat tube and the second tube.

In a preferred embodiment, the at least one support tube is disposed above, below, and combinations of the second tube.

In a preferred embodiment, the positioning device comprises: a tapered concave groove formed in the first tubular member; and a through hole formed in the second tubular member and corresponding to the tapered concave groove And a body constituting the positioning device, a tapered pressing component, a wedge-shaped transmission component and a propelling device; the body is fixed under the through hole of the second pipe member, and the inside thereof is provided with a receiving portion a vertical hole of the pressing member and a horizontal through hole for receiving the wedge drive assembly; the tapered pressing member has a tapered top surface matching the tapered concave groove of the first pipe member and a tapered bottom surface The wedge-shaped transmission component is symmetrically disposed in the horizontal through hole in the left and right directions, and is provided on the end surface adjacent to the tapered pressing component to be symmetric with each other and with a tapered bottom surface of the tapered pressing member. a surface; the propulsion device is operative to urge the wedge-shaped transmission member to be relatively horizontally displaced, and the tapered surface is driven to vertically displace the tapered tensioning member such that the tapered top surface of the tapered compression assembly passes through the first a through hole of the second pipe member to the first pipe Concave conical packing groove, force the first tubular member and second tubular member relative to the locking force by the solid.

In a preferred embodiment, the propulsion device is a propulsion screw having an operating knob, and one of the wedge-shaped transmission members has a screw hole that cooperates with the propeller screw, and the screw is engaged when the propeller screw is rotated. Pushing the wedge drive assembly relative to the horizontal displacement.

In a preferred embodiment, a guide rail is disposed in the horizontal through hole of the body, and the wedge drive assembly is provided with a guide groove matching the guide rail, thereby limiting linear displacement of the wedge drive assembly in the horizontal through hole of the body. .

In a preferred embodiment, the first tube member further has at least one tapered surface, and the second tube member is further provided with at least one fixing spacer at a position corresponding to the tapered surface of the first tube member; A tubular member and the second tubular member are relatively tightly locked, and the tapered surface and the fixed gasket are also relatively tight.

In a preferred embodiment, the tapered inner groove groove is formed on the bottom surface of the first tubular member.

In a preferred embodiment, the positioning device comprises: a tapered concave groove formed in one of the first tubular members; a through hole formed in the second tubular member and corresponding to the tapered concave groove; a tapered pressing member and a propelling device; the tapered pressing member has a tapered top surface that cooperates with a tapered concave groove of the first tubular member; the propulsion device includes a fixed portion a fixing nut on the second pipe member and a propeller screw having an operating handle, and the conical pressing assembly is pushed by the propeller screw to pass the tapered top surface of the conical pressing assembly through the second pipe member The through hole is urged toward the tapered concave groove of the first pipe member to force the first pipe member to be relatively tightly locked with the second pipe member.

10‧‧‧First pipe fittings

11‧‧‧Conical concave groove

12‧‧‧Conical surface

13‧‧‧ Telescopic tube assembly

20‧‧‧Second pipe fittings

21‧‧‧Fixed gasket

23‧‧‧through hole

29‧‧‧ Positioning device

30‧‧‧Ontology

31‧‧‧Vertical holes

32‧‧‧ horizontal through hole

33‧‧‧rails

40‧‧‧Cone tightening components

41‧‧‧Conical top surface

42‧‧‧Conical bottom surface

50‧‧‧Wedge transmission components

51‧‧‧Wedge surface

52‧‧‧ screw holes

53‧‧‧Guide

60‧‧‧ propulsion device

61‧‧‧Operation knob

62‧‧‧Advance screw

70‧‧‧ propulsion device

71‧‧‧Fixed nuts

72‧‧‧Operation handle

73‧‧‧Promoting screw

74‧‧‧ internal thread

75‧‧ ‧ room

76‧‧‧Cone tightening element

77‧‧‧Conical top surface

80‧‧‧5-way pipe

81‧‧‧ seat tube

82‧‧‧ rear fork set

83‧‧‧ head tube

84‧‧‧Front fork

85‧‧‧ Rear wheel

86‧‧‧ front wheel

87‧‧‧Cushion riser

88‧‧‧Cushion

89‧‧‧Handle riser

90‧‧‧Car handle

92‧‧‧ Ground

93‧‧‧ Shelf

94‧‧‧Rechargeable battery

95‧‧· wheel arc motor

101‧‧‧Second support tube

101’‧‧‧Support tube

102‧‧‧First support tube

102’‧‧‧Support tube

1 is a plan view showing the structure of a bicycle frame with adjustable frame length and angle according to the present invention; FIG. 2 is similar to FIG. 1 except that the telescopic tube assembly is adjusted and elongated; FIG. 3 is similar to FIG. 2, but the telescopic tube is indicated by a broken line. The relative position and angle change of each frame tube when the assembly is shortened; FIG. 4 is a plan view showing the structure of the bicycle frame with the adjustable frame length and angle when an electric bicycle is implemented; FIG. 3 is an exploded perspective view of a first embodiment of a positioning device in a bicycle frame structure for adjusting a frame length and an angle; FIG. 6 is an enlarged cross-sectional view of the first embodiment of the positioning device shown in FIG. 5; FIG. 7 is similar to FIG. The first embodiment of the positioning device is in a relaxed state; FIG. 8 is an enlarged cross-sectional view of the second embodiment of the positioning device in the bicycle frame structure of the adjustable frame length and angle; FIG. 9 is similar to the figure 8. The second embodiment of the positioning device is in a relaxed state; FIG. 10 is a plan view showing another embodiment of the bicycle frame structure capable of adjusting the frame length and angle according to the present invention; Figure 11 is a plan view showing still another embodiment of the bicycle frame structure capable of adjusting the length and angle of the frame of the present invention.

1 and FIG. 2, the bicycle frame structure of the adjustable frame length and angle provided by the present invention mainly includes: a five-way pipe 80 for receiving a pedal (not shown); a seat tube 81 connected to the five-way tube 80 and extending upward; a rear fork rod group 82 respectively connected to the seat tube 81 and the five-way tube 80 and extending rearward; a non-horizontal telescopic tube assembly 13 The first tube member 10 and the second tube member 20 can be adjusted by relative telescopic adjustment, and can selectively change the relative distance between the first tube member and the second tube member, thereby changing the relative angle between the bicycle frame tubes. The second tube member 20 is coupled to the seat tube 81 and extends forwardly and upwardly; at least one positioning device 29 for locking the first tube member 10 and the second tube member 20 to the telescopically adjusted fixed position; a head pipe 83 connected to the first pipe member 10 and extending forward and downward; and a front fork bar 84 pivotally connected to the head pipe 83 and extending downward. The at least one positioning device 29 is two positioning devices 29 respectively disposed at different positions on the second pipe member 20.

The present invention further includes a first support tube 102 connected between the seat tube 81 and the telescopic tube assembly 13, so that the rear fork rod group 82, the first support tube 102 and the telescopic tube assembly 13 are combined to form a structural strength. Diamond frame. At the same time, the lower position of the first support tube 102, in addition to reducing the height of the frame and the seat cushion, the height of the upper tube can also be lower, so that the woman or child can easily get on and off the vehicle.

The telescoping tube assembly 13 can also be selectively coupled to the seat tube 81 adjacent the five-way tube 80, which is an equivalent embodiment that is of course contemplated by the present invention.

The bicycle further includes: a rear wheel 85 pivotally connected to the rear fork rod set 82; a front wheel 86 pivotally connected to the front fork rod 84; and a seat cushion riser 87 connected to the seat tube 81 and extending upward And a seat cushion 88; a handle riser 89 pivotally connected to the head pipe 83 and extending upwardly, and a handlebar 90, the handle riser 89 and the front fork lever 84 have an interlocking relationship, and the front wheel 86 can be manipulated The riding direction; a sprocket transmission group (not shown) that can be driven by the pedal and transmit power to the rear wheel 85 (or the front wheel 86); and a brake device (not shown) or the like.

As shown in FIG. 1, the first tube member 10 is moved toward the second tube member 20, thereby shortening the length of the telescoping tube assembly 13, and the first tube member 10 and the second portion are supported by the at least one positioning device 29. When the tubular member 20 is locked in the shortened position, the wheelbase between the front wheel 86 and the rear wheel 85 becomes smaller as the bellows assembly 13 is shortened; and since the telescopic tube assembly 13 has an inclined angle and the front wheel 86 and the rear wheel 85 It is necessary to contact the horizontal ground 92, so that the current and the rear two wheelbases become smaller; the inclination angles of the seat tube 81 and the head pipe 83 respectively connected to the two ends of the telescopic telescopic tube assembly 13 are also reduced to, for example, 69- 71 degrees. The wheelbase between the front wheel 86 and the rear wheel 85 becomes small, which is suitable for the low-speed riding mode of the city car in the metropolitan area. Since the wheelbase is short, the horizontal distance between the seat tube 81 and the head pipe 83 is short, so the ride can be quite good. Straight body riding, better comfort, less fatigue for the average person; and because the front fork angle 84 forward tilt angle and the seat tube 81 tilt angle become smaller, for example, between 69-71 degrees, the ground rebound The vibration makes the ground vibration not easily conveyed directly to the handlebar, so the comfort is better; at the same time, the rider's center of gravity is moved more backwards, making it less prone to rollover when going downhill or emergency braking. The flexibility of handling has also become more sluggish, but riding is more stable.

As shown in FIG. 2, if the first tube member 10 is moved outwardly against the second tube member 20, the length of the telescoping tube assembly 13 is elongated, and the first tube member 10 is pulled by the at least one positioning device 29. When the second pipe member 20 is locked in the extended position, the wheelbase between the front wheel 86 and the rear wheel 85 is increased as the extension tube assembly 13 is extended, and the upper tube distance is also lengthened at the same time; and due to the extension tube assembly 13 has an inclined angle and the front wheel 86 and the rear wheel 85 must be in contact with the horizontal ground 92, so that the inclination angles of the seat tube 81 and the head tube 83 respectively connected to the two ends of the telescopic telescopic tube assembly 13 are also increased to For example, between 73-75 degrees, it is suitable for the high-speed riding mode of the suburban car. When the wheelbase between the front wheel 86 and the rear wheel 85 is increased, it can be applied to a person with a higher height or a high-speed riding mode in a posture of leaning over; the wheelbase between the front wheel 86 and the rear wheel 85 is increased. At the same time, the inclination angles of the seat tube 81 and the head tube 83 and the front fork rod 84 are also When the head tube and the front fork are tilted forward, the steering sensitivity can be obtained, and the inclination angle of the seat tube is increased, so that the rider can more effectively step on the force.

In order to clearly show the difference between FIG. 1 and FIG. 2, referring to FIG. 3, in the case where the bicycle rear wheel 85 is at the same position and the same level height, the solid line indicates that the telescopic tube assembly 13 is elongated, each frame tube The relative position and angle of the frame; the broken line indicates the relative position and angle of each frame tube when the extension tube assembly 13 is shortened. By the parallel comparison of the solid line and the broken line, it is easier to understand the change of the bicycle frame structure of the adjustable frame length and angle when the telescopic tube assembly 13 is stretched. That is, the shorter the telescopic tube assembly 13 is, the smaller the inclination angle of the seat tube 81, the head tube 83 or the front fork rod 84; conversely, the longer the telescopic tube assembly 13 is, the seat tube 81, the head tube 83 or the front fork The angle of inclination of the rod 84 is larger.

Referring to FIG. 4, the bicycle frame structure of the adjustable frame length and angle provided by the present invention can be used in an electric bicycle. In a feasible embodiment, a rechargeable battery 94 is mounted on a frame such as the shelf 93. And an arc motor 95 is mounted on the axle of the rear wheel 85, and the electric power of the rechargeable battery 94 is transmitted to the arc motor 95 by an electric control unit (not shown), thereby driving the bicycle traveler. When riding an electric bicycle, you can choose the mode of full power output or electric power assist, or turn off the power to select the mode of foot pedaling. When the power is exhausted, you can only choose to step on the foot. The above three situations are completely different riding modes for the rider, so the most suitable frame angle should be different; however, the electric bicycles currently sold on the market can only be used in a single car. It is not ideal to apply the above three modes at the same time. The following are three different riding modes for electric bicycles:

1. In the full power output mode, the rider does not need to step on it, and the bicycle can turn forward, just like riding a motorcycle. In this mode, since the rider does not need to step on it, there is no need for a large seat tube 81 angle to facilitate the pedaling force, so it is not suitable for the riding angle of the sports car; at this time, it is necessary to be comfortable and need to use the city car. Riding angle, so shortening the front and rear wheelbases allows the hands to easily hold the handlebar 90, the same When the seat tube 81 and the front fork rod 84 are more inclined, the center of gravity is relatively less than the rearward movement.

2. In the electric assist mode, the rider can turn forward without the need for stepping on the bicycle. In this mode, the rider needs to step on the foot, but does not need to step on the pedal, so it is not suitable for the riding angle of the larger seat tube 81 and the front fork rod 84. At this time, it is necessary to be comfortable, and the city car needs to be selected. The riding angle, in this mode, the front and rear wheelbases need to be slightly enlarged compared with the front and rear axles of the full power output mode, and the angle of the seat tube 81 and the front fork 84 is increased. Allows the rider to easily apply force on the foot while also allowing the hands to easily hold the handlebar 90.

3. Turn off the power to select the mode of foot pedaling, or when the power is exhausted, you can only choose to pedal the bicycle with your foot to turn forward. At this time, this electric bicycle is completely the same as the general bicycle. Generally, if you like high-speed bicycle or for a tall user, you must adjust the front and rear axles to the maximum, and increase the angle of the seat tube 81 and the front fork 84. To make it the riding angle of the racing car, increase the angle of the seat tube 81 to facilitate the foot force; the maximum wheel position can be swooped, reduce the wind resistance, and enjoy the better rotation inertia of the front and rear wheels when the bicycle is riding at high speed; And choose a larger forward tilt angle for better handling.

The bicycle frame structure of the adjustable frame length and angle provided by the invention can cooperate with three different riding modes of the electric bicycle, for example, the front and rear wheelbases, the horizontal distance between the seat tube and the front tube, and the seat tube The tilt angle and the tilt angle of the front fork lever are adjusted in a stepless manner, and can be fully adjusted in accordance with the above three riding modes.

Referring to FIG. 5 to FIG. 7 , the first tubular member 10 and the second tubular member 20 are configured as the telescopic adjustable length telescopic tube assembly 13 with at least one operable positioning device 29 therebetween. The second tube member 20 is connected to the seat tube 81 and has an open end, and the first tube member 10 is connected to the head tube 83 at one end and is sleeved at the other end. Entering the interior of the second tubular member 20. At the positioning device 29 In the relaxed state, the first pipe member 10 and the second pipe member 20 are axially displaceable.

Referring to FIGS. 5-7, the first embodiment of the positioning device 29 includes a body 30, a tapered tensioning assembly 40, a wedge-shaped transmission member 50, and a propulsion device 60. The body 30 is fixed under the at least one through hole 23 of the second tubular member 20, and has a vertical hole 31 for receiving the tapered pressing member 40 and a horizontal through hole 32 for receiving the wedge-shaped transmission assembly 50. The tapered tensioning member 40 has a tapered top surface 41 that cooperates with the tapered concave groove 11 of the first tubular member 10 and a tapered bottom surface 42; the wedge-shaped transmission assembly 50 is symmetrically disposed left and right A wedge-shaped surface 51 is provided in the horizontal through-hole 32 and adjacent to the end surface of the tapered tensioning assembly 40 to be symmetrical with one another and to engage the tapered bottom surface 42 of the tapered tensioning assembly 40.

As shown in FIGS. 6 and 7, the first tubular member 10 has a tapered concave groove 11 and at least one tapered surface 12, and the tapered concave groove 11 is preferably formed on the first tubular member. The bottom surface of the 10, to prevent rain or dust from accumulating in the tapered concave groove 11, the tapered surface 12 is oppositely formed on the top surface of the first pipe member 10; the second pipe member 20 is correspondingly tapered The at least one through hole 23 is disposed at a position of the concave groove 11 to allow a tapered pressing assembly 40 that cooperates with the tapered concave groove 11 to pass through, and the second tubular member 20 corresponds to a tapered surface. At least one fixed spacer 21 is provided at the position of 12.

In addition, it is worth mentioning that the conical concave groove 11 of the first pipe member 10 is below the end of the tail end, and the lock is inherently provided with a screw (not shown) or other restricting member to prevent the first pipe member 10 from being adjusted when the vehicle length is adjusted. Pull out and separate from the second tube 20.

As shown in FIG. 5, a guide rail 33 is defined in the horizontal through hole 32 of the body 30, and the wedge drive assembly 50 is provided with a guide groove 53 for engaging the guide rail 33, thereby limiting the wedge drive assembly 50 on the body 30. Only a linear displacement motion can be made in the horizontal through hole 32.

As shown in FIG. 6, in the first embodiment, the propulsion device 60 is a propulsion screw 62 having an operation knob 61, and one of the wedge-shaped transmission members 50 has a screw hole 52 that cooperates with the propulsion screw 62. When the propeller screw 62 is rotated in the forward direction, the wedge-shaped transmission member 50 is pushed relatively close to the horizontal displacement by the screwing engagement, and is driven by the wedge-shaped surface 51. The tapered bottom surface 42 of the tapered tensioning member 40 is vertically displaced upwardly such that the tapered top surface 41 of the tapered tensioning assembly 40 passes through the through hole 23 of the second tubular member 20 to the cone of the first tubular member 10. The inner concave groove 11 is forced to force the first pipe member 10 to be relatively tightly locked with the second pipe member 20, so that the two are in a tightly fitting elastic pressing state, and the cone of the first pipe member 10 is also forced. The surface of the second tube member 10 and the second tube member 20 are tightly locked to each other, and the first tube member 10 and the second tube member are prevented from being locked together. 20 cases of improper relative radial torsion.

As shown in FIG. 7, when the pusher screw 62 is reversely rotated, the wedge-shaped transmission member 50 is pushed relatively far apart in a horizontal displacement manner by a threaded engagement, and the tapered tensioning assembly 40 is not subjected to the wedge-shaped transmission assembly 50. With the upward thrust and the vertical downward displacement due to its own gravity, the tapered top surface 41 of the tapered tensioning assembly 40 then leaves the tapered concave groove 11 of the first tubular member 10, causing the two to be in a relaxed state. At the same time, the tapered surface 12 of the first tubular member 10 and the fixed gasket 21 of the second tubular member 20 are also in a relaxed state. At this time, the first pipe member 10 and the second pipe member 20 are not tightly locked, so that the first pipe member 10 and the second pipe member 20 can be relatively pulled, thereby adjusting the length of the telescopic pipe member 13.

Referring to FIG. 8 and FIG. 9 simultaneously, in the second embodiment of the positioning device 29, the positioning device 29 includes a tapered pressing member 76 and a pushing device 70; the tapered pressing member 76 has a The conical concave groove 11 of the first tubular member 10 is fitted with a tapered top surface 77. Using the propulsion device 70 to push the tapered tensioning assembly 76 to the tapered concave groove 11 of the first tubular member 10, forcing the first tubular member 10 and the second tubular member 20 to be relatively tightly locked, so that The elastically tight state of the tight fit also forces the tapered surface 12 of the first tubular member 10 to be in close contact with the fixed gasket 21 of the second tubular member 20. The propulsion device 70 is a threaded manual propulsion device including a fixed nut 71 welded to the outer wall of the second tubular member 20 and a push screw 73 having an operating handle 72. The tapered pressing assembly 76 is mounted on the advancing end surface of the propeller screw 73 so as to be pushed by the propeller screw 73, and further moved toward the conical concave groove 11; the fixing nut 71 is engraved with the propulsion screw In addition to the internal thread 74 of the rod 73, a chamber 75 is defined in the interior thereof to accommodate the reversely biased tapered tensioning assembly 76.

As shown in FIG. 9, when the pusher screw 73 is operated in the reverse direction, the tapered tensioning assembly 76 is moved away from the tapered recessed groove 11 to make a slight contact between the two, thereby releasing the relationship between the two. The elastic pressing state of the fixing gasket 21 and the tapered surface 12 is also released, thereby causing a slight gap between the first pipe member 10 and the second pipe member 20, at this time, A tube member 10 is freely displaceable relative to the second tube member 20.

The positioning device 29 described above is a possible embodiment of the present invention. Other conventional devices that can lock or tighten the telescopic tubular member, such as a quick release lever commonly used in bicycles, are all possible embodiments of the present invention.

Referring to FIG. 10, in another embodiment of the bicycle frame structure with adjustable frame length and angle, the main structure is the same as that of the embodiment shown in FIG. 1, and the same components are denoted by the same reference numerals; Partially explained: the non-horizontal telescopic tube assembly 13 in FIG. 10 increases the connection position of the second tube member 20 connected to the seat tube 81 upwards, thereby reducing the inclination angle of the telescopic tube assembly 13 with respect to the horizontal plane; A second support tube 101 connecting the two can be disposed between the second tube member 20 and the seat tube 81 to strengthen the overall structural strength of the frame.

Referring to FIG. 11, in another embodiment of the bicycle frame structure with adjustable frame length and angle, the main components are the same as those of the embodiment shown in FIG. 1, and the same components are denoted by the same reference numerals; The second tube member 20 in FIG. 11 is respectively provided with two support tubes 101' and 102' connected to the seat tube 81 above and below, and the two support tubes 101' and 102' are substantially The symmetrical state is used to strengthen the overall structural strength of the frame.

The bicycle frame structure capable of adjusting the length and angle of the frame can be matched with the rider's height and riding mode, for example, the front and rear wheelbases, the horizontal distance between the seat tube and the front tube, and the seat tube Stepless angle, tilt angle of the front fork, etc. Adjustment. Moreover, while adjusting the horizontal distance between the front and rear wheelbases and the seat tube and the front tube, the tilt angle of the seat tube and the tilt angle of the front fork can be adjusted at the same time to match different riding modes; When the distance between the tube and the front tube is large, the inclination angle of the seat tube and the inclination angle of the front fork rod become larger, which can facilitate the rider to lean over and ride to reduce the wind resistance, and is advantageous for stepping on the force and maintaining a certain degree of control flexibility; When the distance between the seat tube and the head tube is shortened, the inclination angle of the seat tube and the inclination angle of the front fork rod become smaller, which makes it easier for the rider to stand up and improve the riding comfort and the ease of the downhill or emergency braking. The problem of turning over the car.

The detailed description of the preferred embodiments of the present invention is not intended to limit the scope of the present invention. The patent scope of this case.

10‧‧‧First pipe fittings

13‧‧‧ Telescopic tube assembly

20‧‧‧Second pipe fittings

29‧‧‧ Positioning device

80‧‧‧5-way pipe

81‧‧‧ seat tube

82‧‧‧ rear fork set

83‧‧‧ head tube

84‧‧‧Front fork

85‧‧‧ Rear wheel

86‧‧‧ front wheel

87‧‧‧Cushion riser

88‧‧‧Cushion

89‧‧‧Handle riser

90‧‧‧Car handle

92‧‧‧ Ground

102‧‧‧First support tube

Claims (9)

A bicycle frame structure capable of adjusting a frame length and an angle, comprising: a five-way pipe for connecting a pedal; a seat tube connected to the five-way pipe and extending upward; and a connection to the seat pipe And a rear fork bar group extending backwardly; the non-horizontal telescopic tube assembly is composed of a first pipe member and a second pipe member which are relatively telescopically adjustable, wherein the second pipe member is connected to the The seat tube extends forwardly upward; at least one positioning device for locking the first tube member and the second tube member in a fixed position; a head tube connected to the first tube member and extending forward and downward; a front fork rod pivotally connected to the head tube and extending downward. The frame length and adjust the angle of application of the first item of the scope of patent bicycle frame structure further comprises a seat tube connected to the support tube by at least one of between the second tubular member. The bicycle frame structure of the adjustable frame length and angle according to claim 2 , wherein the at least one support pipe is disposed above, below or a combination of the second pipe. The bicycle frame structure of the adjustable frame length and angle according to claim 1 , wherein the positioning device comprises: a tapered concave groove formed in the first pipe member; formed in the second a tubular member and a through hole at one of the tapered recessed grooves; and a body constituting the positioning device, a tapered pressing assembly, a wedge-shaped transmission member, and a propelling device; the body is fixed to the second tubular member Below the through hole, there is a vertical hole for accommodating the tapered pressing member and a horizontal through hole for receiving the wedge-shaped transmission component; the tapered pressing member has a tapered inner portion of the first tubular member a conical top surface of the concave groove and a conical bottom surface; the wedge transmission assembly is symmetrically disposed in the horizontal through hole in the left and right directions, and is symmetrically adjacent to the end surface of the conical pressing assembly The tapered bottom surface of the tapered tensioning element cooperates with a wedge-shaped surface; the propulsion device is operative to urge the wedge-shaped transmission element to be relatively horizontally displaced, and the wedge-shaped surface drives the tapered tensioning element to be vertically displaced, such that Cone tight The top surface of the tapered member through the second through hole of the tubular member, a tapered concave groove of the first pipe to the packing member, the first tubular member to force the tubular member relative to the second locking force are solid. The bicycle frame structure of the adjustable frame length and angle according to claim 4 , wherein the propulsion device is a propulsion screw having an operation knob, and one of the wedge-shaped transmission elements has the propulsion screw A mating screw hole that urges the wedge drive assembly relative to the horizontal displacement by a threaded engagement when the advancement screw is rotated. The bicycle frame structure of the adjustable frame length and angle according to claim 4 , wherein a guide rail is disposed in the horizontal through hole of the body, and the wedge transmission assembly is provided with a guide groove for the guide rail, thereby A linear displacement of the wedge drive assembly within the horizontal through bore of the body is limited. The bicycle frame structure of the adjustable frame length and angle according to claim 4 , wherein the first pipe member further has at least one tapered surface, and the second pipe member has a tapered shape corresponding to the first pipe member. The surface is further provided with at least one fixing spacer; when the first tube and the second tube are relatively tightly locked, the tapered surface and the fixing spacer are also relatively tight. The bicycle frame structure of the adjustable frame length and angle according to claim 4 , wherein the tapered inner groove groove is formed on a bottom surface of the first pipe member. The bicycle frame structure of the adjustable frame length and angle according to claim 1 , wherein the positioning device comprises: a tapered concave groove formed in the first pipe member; formed in the second a tubular member and a through hole for one of the tapered recessed grooves; and a tapered pressing member and a propelling device constituting the positioning device; the tapered pressing member has a tapered inner groove corresponding to the first tubular member a tapered top surface of the groove; the propulsion device includes a fixing nut fixed to the second pipe member and a propeller screw having an operating handle, and the conical pressing member is pushed by the propeller screw to make the cone The tapered top surface of the tensioning assembly passes through the through hole of the second tubular member, and is urged toward the tapered concave groove of the first tubular member, forcing the first tubular member and the second tubular member to be relatively tightly locked. .