TWM451303U - Adjustable bicycle frame structure - Google Patents

Description

Adjustable bicycle frame structure

This creation relates to an adjustable bicycle frame structure, in particular to a stepless adjustment of the rider's height and riding mode, such as the front and rear wheelbases, the horizontal distance between the seat tube and the front tube, and the front fork. The bicycle frame structure such as the inclination angle of the rod and the inclination angle of the seat tube.

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 bar set; a lower pipe connected to the five-way pipe and extending forward and upward; a front pipe connected to the lower pipe and extending forward and downward; a pivotal connection in the front pipe and extending downward Front fork and so on. The partial diamond frame further includes an upper tube connected between the seat tube and the lower 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, commuter cars, off-road vehicles, etc.), and in the frame of their frame structure The distance between the pipes and the angle of inclination have different setting modes, such as the front and rear wheelbases, seat tube and car. The horizontal distance between the head tubes, the angle of inclination of the seat tube and the angle of inclination of the front forks, etc., need to be matched with different vehicle types for different settings. The following examples are used to illustrate: the difference between the stroller, the youth car, and the cart is different except that the wheel diameter is different, and the upper tube distance and the front and rear wheelbases are also different.

Vehicles with longer wheelbase between the two wheels (such as racing cars and off-road vehicles) have good stability and good riding inertia. They are suitable for high-speed riding mode. In this case, a large front fork tilt angle is required. (For example, the front fork angle of the racing car is set to 74-75 degrees) for more sensitive handling and a larger seat tube angle (for example, the speed of the seat tube is set to 74-75 degrees). It is convenient for the rider to step on the force. In particular, the vehicle with a longer wheelbase when the steep slope is lower is less prone to roll over, but because of the long wheelbase, it is necessary to lean over when riding. It is suitable for more professional people, and people generally feel that it is easier to fatigue.

Short-wheel races (such as commuter cars) are suitable for the low-speed riding mode of urban vehicles in the metropolitan area. Due to the short wheelbase, the horizontal distance between the seat tube and the front tube is short, so the body can ride straight when riding. Comfort is better, it is less prone to fatigue for the average person, but this position is not conducive to high-speed driving. Generally speaking, the shorter track is easier to roll forward when the steep slope is lower, so the forward fork angle and the seat tube angle are usually set to 69-71 degrees, which makes the rider's center of gravity move further backwards. When it is sloped, it is not easy to roll over, and its flexibility is slightly shielded, but the ride is more stable, just like a general lady car.

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 to this, the upper tube The distance should also vary slightly with different riding modes. In the high-speed riding mode, a longer front and rear wheelbase or upper tube distance is required, so that the rider can sprint and reduce the wind resistance; In addition, the different riding postures (dive and straight) and the matching handlebars (such as sports car handles and straight handles) will require different upper tube distances.

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 used. After the welding is completed, the size of the frame is fixed. The consumer can't change it. No matter the size is not suitable, it can only bend the existing frame size, and long-term riding often results in sports. Injury, backache, bitterness, and loss of confidence in riding a bicycle. Of course, it is also impossible to match the different riding environment and riding mode, and the frame distance and the tilt angle of the fixed-size conventional bicycle frame structure are reset.

The singer of the case applied for permission in China, No. 091218684 and No. 092210060, providing a telescopic bicycle. The main technical feature is to make the upper tube of the bicycle into a structure that can adjust the length of the upper tube telescopically. 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, since the upper tube is substantially horizontal, when the length of the upper tube is adjusted, the forward tilt angle of the front fork and the tilt angle of the seat tube are substantially the same, and the tilt angle cannot be adjusted with the change of the wheelbase; so that the shaft is When the distance is shortened, there is It is easy to roll forward when steep slopes, and the stability is poor.

The purpose of this creation is to provide an adjustable bicycle frame structure that can be used with the rider's height and riding mode, such as the front and rear wheelbases, the horizontal distance between the seat tube and the front tube, and the seat tube tilt angle. And the front fork lever tilt angle, etc., for stepless adjustment.

The second purpose of the present invention is to provide an adjustable bicycle frame structure, which can adjust the tilt angle of the seat tube and the front fork rod while adjusting the horizontal distance between the front and rear wheelbases and the seat tube and the front tube. Tilt angle to match different riding modes; when the wheelbase is longer, it is convenient for the rider to step on the force and maintain a certain degree of control flexibility; when the wheelbase is shortened, it can be improved before the steep slope is easy. Rollover and poor stability.

Another object of the present invention is to provide an adjustable bicycle frame structure that satisfies the same vehicle and can be gradually adjusted to the most suitable size as the child grows, thereby reducing the number of times the child has to change the vehicle because of growing up. At the same time, you can adjust the long and short wheelbase and the forward tilt angle of the front fork to suit different riding modes.

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 an adjustable bicycle frame structure that can be worn by consumers who can fit different heights in a single size, and can effectively solve the above problem. question.

The adjustable bicycle frame structure capable of achieving the above novel object comprises: a five-way pipe for connecting a pedal; a seat pipe connected to the five-way pipe and extending upward; and a connection to the seat respectively a tube and a five-way tube and a rear fork rod group extending rearward; a lower tube selectively connectable to the five-way tube and one of the seat tube adjacent to the five-way tube and extending forward and upward, the lower tube system The utility model is composed of an inner tube and an outer tube which can be adjusted by telescopic adjustment; a positioning device for locking the inner tube and the outer tube to the fixed position after the telescopic adjustment; a connection to the lower tube and forward a downwardly extending head tube; and a front fork rod pivotally connected to the head tube and extending downward.

Wherein the positioning device forms at least one tapered concave surface and at least one tapered surface on the inner tube, and provides a passage on the outer tube that fits the outer shape of the inner tube at a position corresponding to the concave concave surface. a hole, and at least one fixing spacer is disposed at a position corresponding to the tapered surface; and a pushing device pushes a tapered pressing member through the through hole to press the tapered concave surface to force the inner tube The locker is relatively tight with the outer tube.

Wherein the propulsion device comprises a fixing nut fixed to the outer tube and a propeller screw having an operating handle, the conical pressing element being mounted on the advancing end surface of the propeller screw so that Push the screw to push.

Referring to FIG. 1 and FIG. 2, the adjustable bicycle frame structure provided by the present invention mainly includes: a five-way pipe 60 for connecting a pedal (not shown); a seat tube extending upwardly from the five-way tube 60 61; a rear fork rod group 62 respectively connected to the seat tube 61 and the five-way tube 60 and extending rearward; a lower tube 10 connected to the five-way tube 60 and extending forward and upward, the lower tube 10 is composed of An inner tube 11 and an outer tube 22 which are telescopically adjustable; a positioning device 30 for locking the inner tube 11 and the outer tube 22 to the telescopically adjusted fixed position; The tube 10 and the head tube 63 extending forward and downward; and a front fork rod 64 pivotally connected to the head tube 63 and extending downward.

The present invention further includes an upper tube 71 connected between the seat tube 61 and the lower tube 10, so that the rear fork rod group 62, the upper tube 71 and the lower tube 10 together form a diamond frame with good structural strength.

The lower tube 10 can also be selectively attached to the seat tube 61 adjacent to the five-way tube 60, which is an equivalent embodiment that is of course contemplated by the present invention.

The bicycle further includes: a rear wheel 65 pivotally connected to the rear fork lever group 62; a front wheel 66 pivotally connected to the front fork lever 64; and a seat cushion riser 67 connected to the seat tube 61 and extending upward And a seat cushion 68; a handle riser 69 pivotally connected to the head tube 63 and extending upwardly, and a handle 70, the handle riser 70 and the front fork 64 having an interlocking relationship, and the front wheel 66 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 65 (or the front wheel 66); and a brake device (not shown) or the like.

As shown in FIG. 1, if the inner tube 11 is moved toward the inner tube 22, the length of the lower tube 10 is shortened, and the inner tube 11 and the outer tube 22 are locked by the positioning device 30. In position, the wheelbase between the front wheel 66 and the rear wheel 65 is made smaller as the lower tube 10 is shortened; and since the lower tube 10 has an inclined angle and the front wheel 66 and the rear wheel 65 must be in contact with the horizontal floor 80, So when The front and rear axles become smaller; the inclination angles of the seat tube 61 and the head tube 63 respectively connected to the two ends of the telescopic lower tube 10 are also reduced to, for example, between 69 and 71 degrees. The wheelbase between the front wheel 66 and the rear wheel 65 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 61 and the head pipe 63 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 64 forward tilt angle and the seat tube 61 tilt angle become smaller, for example, between 69-71 degrees, let the rider's The center of gravity moves further back, making it less prone to rollover when going downhill, and its flexibility is slightly shielded, but riding is more stable.

As shown in FIG. 2, if the inner tube 11 is moved outwardly against the outer tube 22, the length of the lower tube 10 is elongated, and the inner tube 11 and the outer tube 22 are locked by the positioning device 30. In the extended position, the wheelbase between the front wheel 66 and the rear wheel 65 is increased as the lower tube 10 is extended; and since the lower tube 10 has an oblique angle and the front wheel 66 and the rear wheel 65 must be in contact with the horizontal On the floor 80, the angle of inclination of the seat tube 61 and the head tube 63 respectively connected to the two ends of the telescopic down tube 10 is also increased to, for example, between 74 and 75 degrees. When the wheelbase between the front wheel 66 and the rear wheel 65 is increased, the stability of the bicycle is good, and the riding inertia is good, which is suitable for the high-speed riding mode, and the front fork angle is increased as the front fork angle is increased. With more sensitive handling, the seat tube tilt angle is also increased, which is convenient for the rider's pedaling force.

Referring to FIG. 5, the solid line indicates the relative position and angle of each frame tube when the lower tube 10 is elongated, and the broken line indicates the relative position and angle of each frame tube when the lower tube 10 is shortened. By the parallel comparison of the solid line and the broken line, it is easier to understand the change of the structure of the adjustable bicycle frame when the down tube 10 is stretched and contracted. shape.

Referring to FIG. 3 and FIG. 4 together, the inner tube 11 and the outer tube 22 are configured as the retractable and adjustable length of the lower tube 10, and an operative positioning device 30 is provided therebetween to make the two portions relatively elastic. In the forced state, the outer tube 22 is connected to the five-way tube 60 and has an open end, and the inner tube 11 is connected to the front tube 63 at one end, and the other end is sleeved into the outer tube 22 internal. When the positioning device 30 is in a relaxed state, the inner tube 11 and the outer tube 22 are axially displaceable.

As shown in Fig. 3, the inner tube 11 is formed with at least one tapered concave surface 40 and at least one tapered surface 41. The tapered concave surface 40 is preferably formed on the bottom surface of the inner tube 11 to prevent rain. Or dust is accumulated in the tapered concave surface 40, and the tapered surface 41 is oppositely formed on the top surface of the inner tube 11; the outer tube 22 is provided at a position corresponding to the tapered concave surface 40. An aperture 42 for allowing passage of an operable tapered tensioning element 43 that cooperates with the tapered concave surface 40, the outer tube 22 being provided with at least one fixed spacer 44 at a location corresponding to the tapered surface 41 . Pushing the tapered pressing member 43 toward the tapered concave surface 40 by a pushing device 50 to make the two of them have a tightly fitting elastic pressing state, and also forcing the tapered surface 41 and the fixing washer 44 In a state of close contact, the inner tube 11 and the outer tube 22 are tightly locked to each other, and an improper relative radial torsion phenomenon between the inner tube 11 and the outer tube 22 can be prevented.

In a preferred embodiment, the propulsion device 50 is a threaded manual advancement device that includes a retaining nut 51 that is welded to the outer wall of the outer tube 22 and a pusher screw 53 that has an operating handle 52. The cone is forced The tensioning member 43 is mounted on the advancing end surface of the propeller screw 53, so that it can be pushed by the propeller screw 53, and then moves toward the conical concave surface 40; the fixing nut 51 is engraved with In addition to the internal thread 54 of the advancing screw 53, a chamber 55 is defined in the interior thereof to accommodate the tapered retracting member 43 which is reversely moved back.

As shown in FIG. 4, when the pusher screw 53 is operated in the reverse direction, the tapered pressing member 43 is moved away from the tapered concave surface 40 to make a slight contact between the two, thereby releasing the relationship between the two. The state of elasticity is tight, and at the same time, the elastic pressing state between the fixing washer 44 and the tapered surface 41 is also released, thereby causing a slight gap between the inner tube 11 and the outer tube 22. At this time, the inner tube 11 is It can be freely displaced relative to the inner tube 22.

The positioning device 30 described above is one of the possible embodiments of the present invention. Other conventional devices that can lock or tighten the telescopic tubular member, such as the quick release lever commonly used in bicycles, are all feasible embodiments of the present invention.

The adjustable bicycle frame structure provided by the creation 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, the seat tube inclination angle and the front fork The tilt angle of the lever, etc., is adjusted in a stepless manner. 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 to match different riding modes; when the wheelbase is lengthened It is convenient for the rider to step on the high-speed ride of the force and maintain a certain degree of control flexibility. When the wheelbase is shortened, the comfort is good and the problem of easy roll-over and poor stability when the steep slope is improved can be improved.

The detailed description above is specific to one of the possible embodiments of this creation. It is to be understood that the examples are not intended to limit the scope of the patents of the present invention, and that equivalents or modifications may be included in the scope of the patent.

10‧‧‧Under the tube

11‧‧‧Inner management

22‧‧‧External management

30‧‧‧ Positioning device

40‧‧‧Conical concave surface

41‧‧‧Conical surface

42‧‧‧through hole

43‧‧‧Cone tightening elements

44‧‧‧Fixed gasket

50‧‧‧ propulsion device

51‧‧‧Fixed nuts

52‧‧‧Operation handle

53‧‧‧Promoting screw

54‧‧‧ internal thread

55‧‧ ‧ room

60‧‧‧5-way pipe

61‧‧‧ seat tube

62‧‧‧ rear fork set

63‧‧‧ head tube

64‧‧‧Front fork

65‧‧‧ Rear wheel

66‧‧‧front wheel

67‧‧‧Cushion riser

68‧‧‧Cushion

69‧‧‧Handle riser

70‧‧‧Car handle

71‧‧‧Upper tube

80‧‧‧ ground

Figure 1 is a plan view of the structure of the adjustable bicycle frame; Figure 2 is similar to Figure 1, but the lower tube is adjusted and elongated; Figure 3 is the part drawn along line 3-3 of Figure 1. An enlarged view of the cross section, wherein the positioning device is in a locked and forced state; FIG. 4 is similar to FIG. 3 except that the positioning device is in a relaxed state; and FIG. 5 is similar to FIG. 2, but the lower tube is indicated by a broken line. Adjust the frame change when shortening.

10‧‧‧Under the tube

11‧‧‧Inner management

22‧‧‧External management

30‧‧‧ Positioning device

60‧‧‧5-way pipe

61‧‧‧ seat tube

62‧‧‧ rear fork set

63‧‧‧ head tube

64‧‧‧Front fork

65‧‧‧ Rear wheel

66‧‧‧front wheel

67‧‧‧Cushion riser

68‧‧‧Cushion

69‧‧‧Handle riser

70‧‧‧Car handle

71‧‧‧Upper tube

80‧‧‧ ground

Claims (6)

The utility model relates to an adjustable bicycle frame structure, comprising: a five-way pipe for connecting a pedal; a seat pipe connected to the five-way pipe and extending upward; one connected to the seat pipe and the five-way pipe respectively a rear fork bar group extending rearward; a lower pipe selectively connectable to the five-way pipe and one of the seat pipe adjacent to the five-way pipe and extending forward and upward, the lower pipe system being adjustable by relative expansion and contraction An inner tube and an outer tube; a positioning device for locking the inner tube and the outer tube to the telescopically adjusted fixed position; a front end connected to the lower tube and extending forward and downward a tube; and a front fork rod pivotally connected to the head tube and extending downward. The adjustable bicycle frame structure according to claim 1 , wherein the positioning device forms at least one tapered concave surface and at least one tapered surface on the inner tube, and cooperates with the inner tube shape. The outer tube is provided with a through hole at a position corresponding to the concave concave surface, and at least one fixing spacer is disposed at a position corresponding to the tapered surface; and a tapered pressing member is driven by a pushing device The through hole is forced toward the tapered concave surface, forcing the inner tube to be relatively tightly locked with the outer tube. The adjustable bicycle frame structure according to claim 2 , wherein the propulsion device comprises a fixing nut fixed to the outer tube and a propeller screw having an operating handle, the taper is tight The component is mounted on the forward end face of the pusher screw so that it can be pushed by the pusher screw. The adjustable bicycle frame structure of claim 2 , wherein the tapered concave surface is formed on a bottom surface of the inner tube. The adjustable bicycle frame structure according to claim 1 , further comprising an upper tube connected between the seat tube and the lower tube. The adjustable bicycle frame structure according to claim 1 , wherein the lower pipe is connected to the five-way pipe.