FI90221C - Bicycle - Google Patents

Description

90221 in POLKUPYORÅ

The invention relates to a bicycle as defined in the preamble of claim 1.

5 A bicycle is previously known, the body of which is formed of two parts, i. from the front of the body and from the rear of the body, which are connected to each other by an articulated structure. The front and rear parts of the frame are then pivoted from the articulation structure to each other in close proximity to each other when the bicycle is to be brought into the transport position. In the normal riding position, the articulated structure is locked so that the front and rear of the frame form a substantially fixed frame of a normal bicycle. The hinge structure is generally used as the articulation structure, whereby the front part of the body 15 can be pivoted around the hinge pin parallel to the rear part of the body.

A disadvantage of the known bicycle is that the stresses in the riding position are applied directly to the hinge axle, which is why the hinge structure must be 20 relatively stiff. A further disadvantage is that the hinge joint is outside the frame structure and fully exposed to weather variations and external mechanical stresses.

A further disadvantage of the known bicycle is that in the transport position the front part and the rear part of the frame must be locked together in order to be able to be towed behind. In general, transport other than, for example, in the luggage compartment of a passenger car or in a public transport vehicle, does not work comfortably or effortlessly on such a wheel. The articulated structure is perfect, not to mention the fact that little attention has been paid to the design and weight of the wheel frame structure itself: for example, to facilitate transport by walking.

.-. The object of the invention is to eliminate the above-mentioned drawbacks. In particular, it is an object of the invention to provide a new type of urban bicycle which is particularly suitable for driving short distances and which can be easily moved from a driving position to a transport position in the smallest possible size and easily movable package.

The bicycle according to the invention is characterized by what is stated in claim 1.

The bicycle according to the invention comprises a frame formed of two parts, a front part 10 of the frame and a rear part of the frame, which are connected to each other by a hinged structure so that the front and rear parts of the frame can be rotated from 15 is arranged in connection with the body substantially perpendicular to the longitudinal direction of the body. According to the invention, the articulation structure comprises a first and a second segment portion, the first segment being arranged in connection with the front part of the body and the second segment in connection with the rear part 20 of the body, the segments being arranged in a cylindrical housing , wherein the first side surfaces of the segment parts are arranged to rest on the ground in the driving position, most preferably above the central axis, and to be released from each other when the front and rear parts of the body are turned with their segments into the transport position.

The jacketed cylindrical housing may be arranged in connection with the front part of the body or the rear part of the body together with either the first segment or the second segment. In this case, the cylindrical housing is formed by a cylindrical recess, a part of which is covered by a segment part of the corresponding body part, while the segment part of the other body part 35 can be fitted in this cylindrical housing.

In one embodiment of the bicycle, the casing of the cylindrical 90221 3-shaped housing is formed as part of a separate body part to which a saddle is connected. With the aid of a separate body part, it is possible, for example, to adjust the position of the saddle to a suitable height with respect to the front and rear part of the body. In addition, the cylindrical housing can be formed as a separate space, in connection with which the front part and the rear part of the body can be arranged from their segment parts.

In one embodiment of the bicycle, the first segment part is arranged to protrude in connection with the front part 10 of the frame and the second segment part is arranged to protrude in connection with the rear part of the frame. This structure is particularly advantageous when using a separate body part in which a cylindrical housing of the associated casing is formed. In this way, the articulation structure can be implemented in a technically advantageous manner.

In one embodiment of the bicycle, the segmental portions of the front and rear portions of the frame include heel portions adapted to form a cylindrical seat. The function of the platform parts is to act as centering parts 20 so that both the front part and the rear part of the frame can be pivoted reliably and safely around a common pivot axis.

In one embodiment of the bicycle, the articulation structure comprises locking means for locking the front part and the rear part of the frame together at least in the upright position of the bicycle I '· .. a. The locking means are preferably used ____ also to lock the front and rear parts of the body to each other in the transport position.

λ. In one embodiment of the bicycle, the locking means are arranged to pass through the openings passing through the tip portions of the first and second segment portions of the front and rear portions of the body and the central axis of the cylindrical housing to lock the front and rear portions and segment portions together.

35 In one embodiment of the bicycle, the locking means comprises an axle pin provided at a first end with an end flange or similar es-90221 4 support member and at the second end with a swing arm having an eccentric member at the front or rear of the body.

In one embodiment of the bicycle, the housing of the cylindrical housing comprises annular abutment surfaces and the segment parts are surrounded by annular friction surfaces of the front and rear parts of the body fitted to the abutment surfaces. The purpose of the abutment surfaces and friction surfaces is to provide the widest possible contact surfaces between the parts 10 so that they remain in the desired position against each other.

In one embodiment of a bicycle, the annular abutment surfaces of the sheath and the friction surfaces of the front and rear of the frame are conical surfaces. These surfaces are, in particular, conical surfaces in opposite directions to the vertical plane of the bicycle. Thus, in order to lock the front and rear parts of the body against each other and against the casing, especially in the driving position, a very high compressive force is not required, whereby the locking members can be relatively light in construction.

In one application of a bicycle, friction rings are arranged between the abutment surfaces and the friction surfaces. Friction tires can be used to facilitate the maintenance of the bicycle and to provide high friction between the surfaces resting on each other. Friction rings can be made, for example, of a suitable plastic, such as elastomer, in which case the friction ring is made to function in an articulated structure. . like a disc spring.

An advantage of the invention is that the path-30 wheel according to it is easy to use; the bicycle is easily accessible in the transport position and again in the driving position. Putting the bicycle into the transport position is done quickly with a couple of hand movements, after which the bicycle can be carried or pulled behind the handlebar-35. When assembled, the bicycle can also fit in the trunk of a car and does not take up much space, for example when storing.

90221 5

A further advantage of the invention is that its articulation structure is simple, reliable and easy to implement.

A further advantage of the invention is that the parts related to the articulation structure are integrated into the front and rear parts of the bicycle frame so that it does not include any protruding and easily breakable parts. The bicycle is easy to ride, tow and maintain.

A further advantage of the invention is that the frame of the bicycle with the articulated frame can be made of, for example, composite plastic, whereby the frame is made light and durable. The technology of manufacturing plastics also makes it possible to make all the necessary functional elements in the body parts and in connection with the casing of the 15-cylinder housing. In this way, the number of parts of the entire frame structure of the bicycle can be reduced.

In the following, the invention and other related advantages will be described in detail with reference to the accompanying drawing, in which Figure 1 shows a side view of a wheel according to the invention in the driving position; Figure 2 is a side view of the wheel of Figure 1 in the transport position; Fig. 3 shows an exploded view of an articulated structure of a bicycle according to the invention; Fig. 4 also shows an exploded view of the locking means of the articulation of Fig. 3; Figure 5 shows a cross-section of the articulated structure of Figure 3; ... Fig. 6 shows the position of the segment parts of the articulated structure of Fig. 3 in the driving position; and Figure 7 shows the position of the segment parts in the transport position, respectively.

The bicycle according to the invention is shown in Figure 1 in the riding position. The bicycle comprises a frame 1 formed of two parts, the front part 2 of the frame 2 6 9 G 2 21 and the rear part 3 of the frame 3. A front wheel 4 is connected to the front part 2 of the frame and a rear wheel 5 connected to the rear part 3 of the frame. 8 and the chain 9 are arranged 5 in the normal way in connection with the rear part 3 of the frame and the rear wheel 5. The handlebar 10 is in turn connected to the front part 2 of the body. The saddle 11 is connected to the front and rear parts of the body by two separate body parts 12, which is also one part of the body 1.

The front part 2 and the rear part 3 of the frame 1 are connected to each other by an articulated structure 13. Thanks to this articulated structure 13, the front part 2, the rear part 3 and the separate frame part 12 can be pivoted to the bicycle transport position shown in Fig. 2. In this position, the front part 2 and the rear part 3 of the body 15 are approximately in the same direction, but partly crossed so that the front wheel 4 and the rear wheel 5 of the bicycle are approximately parallel. The saddle 11 is turned by means of a separate body part 12 to a position deviating from the driving position towards the front and rear wheels 20, 5. In this case, the bicycle has a protruding part with a handlebar 10, from which the folded bicycle can be pulled behind, e.g. Alternatively, the bicycle can be easily placed in the luggage compartment of a car, for example.

An articulation structure 13 of a bicycle according to the invention is illustrated in the exploded view of FIG. The articulation structure 13 comprises a cylindrical housing 15 provided with a jacket 14, a first segment part 16 and a second segment part 17. The jacket 14 of the cylindrical housing 15 30 is in this case formed as a separate body part 12 connected to the saddle 11, as shown in Figure 1. . The cylindrical housing 15 is thus preferably arranged in connection with a separate body part 12 in such a way that it, and in particular its central axis A-A, is substantially perpendicular to the longitudinal axis of the bicycle, i.e. the longitudinal direction of the body 1. The longitudinal axis passes through the poles of the front wheel 4 of the bicycle and the rear wheel q r, o o Ί 7 U <L i. I 7 5 when the wheels 4, 5 are parallel. In addition, the cylindrical housing 15 is open on both sides, i.e. it is arranged to pass through the jacket 14.

The first segment part 16 is arranged in connection with the front part 2 of the body so that it protrudes from its surface. Correspondingly, the second segment part 17 is arranged in connection with the rear part 3 of the body so that it also protrudes from the rear part of the body. In addition, the segments 16, 17 project 10 substantially perpendicularly to the longitudinal axis of the bicycle and at the same time to the longitudinal direction of the body 1.

The segment portions 16, 17 are formed of segment-like portions, the central angle α, β of which is preferably 120 ° and the curved portions of the circles 15 form the outer surfaces 16c, 17c of the segments and the radial surfaces are the side surfaces 16a, 16b of the segments; 17a, 17b.

The front part 2 and the rear part 3 of the body are arranged from their segment parts 16, 17 in a cylindrical housing 15 so that the segment parts 16, 17 are located on opposite sides of the cylindrical housing 15 when viewed from the direction of the central axis AA of the housing 15. The outer surfaces 16c, 17c against the inner surface 15a of the housing 15 and the tip portions are on the central axis AA. The front part 2 and the rear part 3 of the body 25 with their segment parts 16, 17 can then be turned relative to the central axis A-A of the housing 15.

In connection with the segment parts 16, 17, the platform parts 18, 19 are preferably included. These platform parts have a circular cross-section and their diameters 30 correspond to the diameter of the cylindrical housing 15. When the segment parts 16, 17 are fitted in the cylindrical housing 15, the platform parts 18, 19 center the segment parts 16, 17 in their correct positions with respect to the housing 15 and in particular with its central axis A-A.

The articulated structure 13 comprises locking means for locking the front and rear parts 2, 3 of the frame and their segment parts 16, 17 together in the riding position of the bicycle and preferably also in the transport position. The locking means can be located on the outside of the actual articulation structure 13 between the front and rear parts 2, 3 of the body. By means of them, the front and rear parts 2, 3 and 5 of the body are pressed together at a possible position in the driving and transport position at a possible separate body part 12 at the articulation structure 13. When the position of the bicycle is changed, the articulation structure 13 is released from the compression of the locking means.

In the preferred embodiment 10, the locking means 20 are arranged to pass through the openings 33, 34 passing through the carcass parts of the first and second segment parts 16, 17 and the central axis A-A of the cylindrical housing 15.

through. The locking means 20 comprise, as can be seen in Figure 4, a shaft pin 21 provided with a first end flange 22 and at the other end a support arm 23. The crank arm 23 is attached to the shaft pin 21 by a pin 24. The crank arm 23 has a non-central member 25, as a protrusion, at a distance from the pivot axis formed by the pin 24. The position of the shaft pin 21 20 and the end flange 22 relative to each other in the direction of the central axis A-A can be adjusted by means of the threaded connection therein.

The locking means 20 operate as follows. With the pivot arm 23 substantially in the direction B of the central axis A-A in position B in Fig. 5, the parts of the articulation structure 13 are harnessed relative to each other and thus movable; the position of the body parts 2,3 and 12 relative to each other can be changed. The bicycle can be moved from the driving position to the transport position or back. When the pivot arm 23 is pivoted 30 in the direction of the body to position C in Fig. 5, the eccentric member 25 presses the rear part 3 of the body adjacent to the shaft pin 21 and the central shaft AA and further shells 14 towards the 5) tightly 35 against each other in the locking position. By means of the pivot arm 23 and the associated eccentric member 25, a sufficient compressive force 9 9 Π 2 21 is thus obtained simply and efficiently.

In connection with the rear part 3 of the body, a recess arm 26 is arranged in the arms, to which the head arm 23 can be fitted in a position 5 conforming to the shapes of the body 1 when the body parts 2, 3, 12 are locked together. The carrying arm 23 can be used in the open position B (Fig. 5) as a hand support when moving the path wheel and especially when lifting.

In a preferred embodiment of the invention, the housing 14 of the cylindrical housing 15 comprises annular abutment surfaces 27, 28 arranged around the housing. Respectively, the segment parts 16, 17 have annular friction surfaces 29, 30 arranged on the abutment surfaces -7, 28. It is preferred that these abutment surfaces 27, 28 and the friction surfaces 29, 30 are conical surfaces, as shown in Fig. 5. These surfaces are preferably conical surfaces on opposite sides of the front part 2 and the rear part 3 of the body, whereby their locking effect is enhanced.

20 The articulated structure 13 must be locked completely rigid, especially in the riding position of the bicycle. In this case, the parts associated with the articulation structure 13 must fit together seamlessly, even if slightly worn. The conical shape of the friction surfaces 29, 30 of the body parts 2, 3, such as the corresponding shape of the abutment surfaces 27, 28 of MySs-25, allows the parts; locking against each other tightly. Thus, a high rest friction is achieved in the articulation structure 13. In addition, it should be noted that these parts rub against each other, so that wear cannot be prevented. In this case, friction rings 31, 32 can preferably be arranged between the abovementioned abutment surfaces 27, 28 and the friction surfaces 29, 30. These friction rings 31, 32 can always be replaced if necessary due to their wear. They can be made of plastic or other suitable material. In addition, they preferably act as spring-like transmission elements between the surfaces and thus strengthen the rigidity of the articulation structure.

ίο 90221

The operation of the articulated structure 13 of the bicycle according to the invention can be illustrated by means of Figures 6 and 7. Assume that the cover arm 23 is in the open position B in Fig. 5, in which case the locking means 20 are not in the locking position 5 and the articulation structure is out. The front part 2 and the rear part 3 of the body, such as the first segment part 16 and the second segment part 17 in the cylindrical housing 15, can then be folded relative to each other. The front part 2 and the rear part 3 of the frame can be turned to the driving position 10 in Fig. 1, whereby the radial side surfaces 16a, 17a of the segment parts 16, 17 press against each other and thus support each other preferably above the central axis A-A substantially along the longitudinal axis When the cover arm 23 of the locking means 20 is now turned to the position C, i.e. to the locking position, the annular abutment surfaces 27, 28 are pressed tightly together against the friction surfaces 29, 30 by means of the shaft pin 21 by means of the shaft pin 21. The hinge structure 13 is thus stiffened 20 into a stationary assembly. It should be noted that in the driving position the weight stresses are applied specifically to the radially side surfaces 16a, 17a of the segment parts 16, 17 and through them to the body parts 2, 3 (cf. Fig. 6).

The locking means 20 are opened when it is desired to assemble the bicycle to the transport position in Fig. 2. The pivot arm 23 is moved from position C to position B in Fig. 5, after which the front part 2 and the rear part 3 can be pivoted relative to each other as shown in Fig. 2. The separate body part 12, to which the saddle 11 is attached, can also be turned to the desired position. The front part 2 and the rear part 3 of the body can be rotated 90 ° with respect to the axis A-A in this case, whereby the second radial side surfaces 16b, 35 17b of the segment parts 16, 17 meet, as shown in Fig. 7.

This position corresponds to the wheel transport position according to figure 2. Again, the arm of the locking member 20 23 11 p r r> r \ λ

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by turning from position B to position C, the front and rear parts 2, 3 of the body can be locked in any position so that they cannot move relative to each other. At the same time, the separate body part 12 is also locked in the desired inverted transport position.

It should be noted that the separate body part 12 can be moved relatively freely between the front part 2 and the rear part 3 of the body when changing the position of the bicycle. The trajectory of the separate body portion 12 about the central axis A-A 10 is more than 200 °.

The invention is not limited to the above-mentioned applications, but many modifications are possible while remaining within the scope of the inventive idea defined by the claims.

Claims (10)

1. A bicycle, spring frame (1) is formed of two parts, the front part of the frame (2) and the rear part (3), which are connected to each other with a link structure (13) so that the front part of the frame (2) ) and the rear part (3) are pivotable from the crusher to each other in the proximity of the bicycle's transport position, to which the joint structure (13) comprises a cylindrical housing (15) fitted with a sheath (14), which is arranged adjacent to the frame. (1) substantially perpendicular to the longitudinal direction of the frame, characterized therefrom, to include in the hinge structure (13) an understanding and a second segment part (16, 17), which understand segment part (16) is arranged adjacent to the front part of the frame (2). ) and the second segment portion (17) adjacent to the rear portion (3) of the frame, which segment portions (16, 17) of the cylindrical housing (15) viewed in the direction (AA) of its center axis are disposed on opposite sides of the housing and are pivotable. relative to the center axis (AA) of the cylindrical housing (15), wherein s understand the side surfaces (16a, 17a) of the body parts (16, 17) arranged to stand against each other in the crusade advantageously on the upper side of the center axis (AA) of the housing (15), and to be released from one another as the front part (2) of the frame (2) and rear portion (3) in relation to the center shaft (AA) is pivoted with associated segments (16, 17) from the crusher to the conveyor. 2. A bicycle according to claim 1, characterized in that the casing (14) of the cylindrical housing (15) is formed as part of a separate frame part (12) to which a saddle (11) is joined. 3. A bicycle according to claim 2, characterized in that it understands the segment part (16) is arranged to project from the front part of the frame (2) and the second segment part (17) is arranged to project from the rear part of the frame (3). link. 15 9 Γ: 22 '! A bicycle according to claim 3, characterized in that, in connection with the segment parts (16, 17), there are raised parts (18, 19) which are fitted into the cylindrical housing (15). 5. A bicycle according to claims 1, 2, 3 or 4, characterized in that the locking means (20) for locking the front and rear part (2, 3) and their associated segment parts (16, 4) are secured to the hinge structure (13). 17) at each other at least in the crusade of the cycle. 6. A bicycle according to claim 5, characterized in that the locking medium (20) is arranged to pass through the openings (33, 34) of the segment segments and the second segment parts (16, 17) and through the cylindrical housing (20). 15) center shaft (AA) for locking the front and rear portions (2, 3) and segment portions (16, 17) together. 7. A bicycle as claimed in claim 6, characterized in that a locking pin (21) is provided to the locking medium (20), which in its one year is provided with a spirit flange (22) or a similar track means and in its second spirit with a swing arm (23), and there is an eccentric means (25) for pressing the front portion 25 (2) and rear portion (3) of each frame against each other and against the manifold (14) in the locking post. : "8. A bicycle according to any of the preceding claims, characterized in that the ring-shaped counter surfaces (27, 28) and around the segment parts (16, 17) are adapted to the counter parts for the cylindrical housing (15) of the casing (14). annular friction surfaces (29, 30. in the front and rear of the frame). 9. A bicycle according to claim 8, characterized in that the annular counter-surfaces 35 (27, 28) of the mantein and the front and rear friction surfaces (29, 30) of the frame are conical surfaces. 10. A bicycle according to claim 8 or 9, characterized in that adapted friction rings (31, 32) are arranged between the counter surfaces (27, 28) and the friction surfaces (29, 30).