CN217198499U

CN217198499U - Folding crank

Info

Publication number: CN217198499U
Application number: CN202023352458.3U
Authority: CN
Inventors: 郑汉信
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-12
Filing date: 2020-12-30
Publication date: 2022-08-16
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a folding crank, including crank main shaft, connection handle and locking mechanism, crank main shaft one end is equipped with first unsmooth face, the one end of connection handle is equipped with the unsmooth face of second, the unsmooth face cooperation of first unsmooth face and second, locking mechanism is used for installing connection handle on the crank main shaft with the elasticity. The utility model provides a folding crank, convenient operation, structure are reliable.

Description

Folding crank

Technical Field

The utility model relates to a bicycle and electric bicycle technical field, specifically speaking relates to a folding crank that is used for bicycle or electric bicycle to go up.

Background

The bicycle is as traditional instrument of riding instead of walk, and is leisure, motion instrument now, especially modern life quality's improvement, and motion, leisure receive people's attention, and the unique motility of bicycle and leisure are loved for modern people, and the cooperation is at home or the convenience of going out to carry, but beta structure is made to the bicycle, and folding bicycle is liked by people deeply promptly, and folding bicycle cooperates the car to improve its mobility for its activity area is wider, promotes the recreational and the leisure of riding.

Folding bicycle on the market, the crank is fixed can not be folded, because the crank is overhanging after the bicycle is folded, bulky, area is big, and the crank is outstanding not convenient for place the bicycle after folding. Chinese patent document CN1475396A discloses a rotary crank for a foldable bicycle, which is characterized in that a big-end locking bolt is used to press the lower part of the crank, so that the lower part of the crank and the upper part of the crank are locked by friction between the lower part of the crank and the upper part of the crank, and the lower part of the crank and the big-end locking bolt.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a folding crank, convenient operation, the structure is reliable.

The utility model discloses a technical scheme that folding crank adopted is:

a folding crank comprises a crank main shaft, a connecting handle and a locking mechanism, wherein a first concave-convex surface is arranged at the end of the crank main shaft, a second concave-convex surface is arranged at one end of the connecting handle, the first concave-convex surface is matched with the second concave-convex surface, and the locking mechanism is used for installing the connecting handle on the crank main shaft in an elastic mode.

As a preferred scheme, the locking mechanism comprises a connecting rod, a connecting hole is formed in one end of the crank spindle, a through hole is formed in the connecting handle, the connecting rod penetrates through the through hole to be arranged in the connecting hole of the crank spindle, and the crank spindle and the connecting handle are fixed relatively.

As a preferred scheme, the locking mechanism further comprises an elastic piece, the connecting rod is provided with a large-head end part and a rod part, the rod part is provided with an external thread, the connecting hole in the crank spindle is a threaded hole, the elastic piece is sleeved on the rod part of the connecting rod, one end of the elastic piece is abutted to the large-head end part of the connecting rod, and the other end of the elastic piece is abutted to the connecting handle.

Preferably, the locking mechanism further comprises a clamp spring, a clamp spring groove is formed in the rod portion, the clamp spring is arranged in the clamp spring groove of the connecting rod, and one end of the connecting rod is prevented from falling off the crank spindle.

As a preferred scheme, the locking mechanism further comprises a threaded rod with a head and an elastic piece, wherein the threaded rod with the head penetrates through a through hole in the main shaft of the shaft handle and the elastic piece and is fixedly arranged in a connecting hole in the connecting handle.

Preferably, the locking mechanism further comprises an anti-falling screw and an elastic piece, two ends of the elastic piece respectively abut against the big head end portion and the connecting handle of the connecting rod, the connecting rod is provided with a penetrating hole, the big head end portion is provided with a counter bore, and the anti-falling screw penetrates through the penetrating hole and is connected with the crank spindle.

Preferably, one end of the rod part is provided with an internal threaded hole, the end part of the big head is provided with a threaded connection part, and the end part of the big head is in threaded connection with one end of the rod part through the threaded connection part.

As preferred scheme, locking mechanism includes quick detach eccentric handle, articulated shaft and connecting axle, quick detach eccentric handle is equipped with cam and handle, be equipped with the eccentric orfice on the cam, the articulated shaft is located in the eccentric orfice, the other end of connecting handle is equipped with the arcwall face, the arcwall face cooperates with the cam of quick detach eccentric handle, be equipped with the through-hole on the connecting handle, the one end of crank main shaft is equipped with the connecting hole, the one end and the articulated shaft fixed connection of connecting axle, the other end of connecting axle passes through-hole and crank main shaft fixed connection.

Preferably, the locking mechanism further comprises a spring, a step is arranged in the through hole of the connecting handle, the spring is sleeved on the connecting shaft and arranged in the through hole of the connecting handle, and two ends of the spring are respectively abutted against the step and the hinged shaft.

According to a preferable scheme, the locking mechanism comprises an eccentric shaft, a rotating handle and an adjusting rod, a shaft hole is formed in the adjusting rod, an eccentric shaft hole is formed in the connecting handle, the eccentric shaft penetrates through the shaft hole in the adjusting rod and is arranged in the eccentric shaft hole in the connecting handle, the adjusting rod is fixedly connected with the crank spindle, and the rotating handle is fixed on the eccentric shaft.

As a preferred scheme, the locking mechanism further comprises an adjusting screw, one end of the adjusting rod is provided with an adjusting internal thread hole, and the adjusting screw is arranged in the adjusting internal thread hole.

As preferred scheme, locking mechanism still includes handle anticreep and return spring, the last anticreep mounting hole that is equipped with of turning handle, the handle anticreep is buckled and is equipped with spout and anticreep groove, be equipped with the convex part in the spout, the convex part is located during turning handle's anticreep is buckled the mounting hole, the anticreep mounting hole is bigger than the convex part, the bottom of spout is equipped with and keeps off the wall, return spring one end butt keeps off the wall, the bottom of other end butt convex part, the anticreep groove is equipped with anticreep portion and ejector pin entry, be equipped with the ejector pin on the crank spindle, the ejector pin corresponds with the ejector pin entry in anticreep groove.

Preferably, the crank is characterized by further comprising a dustproof sleeve, wherein the dustproof sleeve is arranged on the crank main shaft and is positioned at the joint of the first concave-convex surface and the second concave-convex surface.

The utility model discloses a folding crank's beneficial effect is: the locking mechanism is used for installing the connecting handle on the crank main shaft in an elastic manner, the first concave-convex surface on the crank main shaft is matched with the second concave-convex surface on the connecting handle, when the first concave-convex surface is meshed with the second concave-convex surface, the crank main shaft and the connecting handle are relatively fixed, the structure is reliable, the connecting handle and the crank main shaft can rotate or are fixed relatively through the elasticity of the locking mechanism, and the operation is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a folding crank according to an embodiment of the present invention.

Fig. 2 is an exploded view of a folding crank according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a connecting handle of a folding crank according to an embodiment of the present invention.

Fig. 4 is a schematic assembled sectional view of a folding crank according to an embodiment of the present invention.

Fig. 5 is a schematic view of the folded crank and pedal assembly according to the embodiment of the present invention in an unfolded state.

Fig. 6 is a schematic view illustrating a folded state of the crank and pedal assembly according to the present invention.

Fig. 7 is an exploded view of the folding crank according to the embodiment of the present invention.

Fig. 8 is a schematic view of the folded crank and pedal assembly structure according to the embodiment of the present invention in an unfolded state.

Fig. 9 is a schematic structural diagram of a three-folding crank according to an embodiment of the present invention.

Fig. 10 is an exploded view of a tri-fold crank according to an embodiment of the present invention.

Fig. 11 is a schematic cross-sectional view of a triple-folding crank according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a four-fold crank according to an embodiment of the present invention.

Fig. 13 is an exploded view of a four-fold crank according to an embodiment of the present invention.

Fig. 14 is a schematic structural view of a five-fold crank according to an embodiment of the present invention.

Fig. 15 is an exploded view of a five-fold crank according to an embodiment of the present invention.

Fig. 16 is a schematic structural view of a rotating handle of a five-fold crank according to an embodiment of the present invention.

Fig. 17 is a schematic structural view of the handle anti-releasing of the five-folding crank according to the embodiment of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to a specific embodiment and a drawing of the description, in which:

example one

Referring to fig. 1 to 6, a folding crank comprises a crank main shaft 10, a connecting handle 20 and a locking mechanism 30. The crank main shaft 10 has a connecting hole 11 at one end, a first concave-convex surface 12 at the end face, the first concave-convex surface 12 is preferably square or trapezoid concave-convex, the other end is mounted on a five-way pipe on a bicycle frame through a crank shaft, the crank shaft is not shown in the figure, the connecting handle 20 is provided with a through hole 21, a second concave-convex surface 23 is provided at one end of the connecting handle 20, referring to figure 3, the first concave-convex surface 12 and the second concave-convex surface 23 are matched, a pedal mounting hole 22 is provided at the side of the connecting handle 20, the pedal mounting hole 22 is used for mounting a pedal 40,

the locking mechanism 30 comprises a connecting rod 31, an elastic part 32 and a clamp spring 33, the connecting rod 31 is provided with a large end part 311 and a rod part 312, the rod part 312 is provided with a clamp groove 313 and an external thread, the clamp spring 33 is arranged in the clamp groove 313 on the rod part 312 to prevent the connecting rod 31 from being completely loosened from the main shaft 10, the elastic part 32 is sleeved on the rod part 312 of the connecting rod 31, two ends of the elastic part 32 are respectively abutted to the large end part 311 and the connecting handle 20, the rod part 312 of the connecting rod 31 penetrates through a through hole 21 on the connecting handle 20, and the connecting rod 31 is fixedly connected in a connecting hole 11 of the crank main shaft 10 through threads, so that the crank main shaft 10 is connected with the connecting handle 20. In the scheme, an operation hole is generally formed in the side portion of the crank main shaft 10, which is not shown in the figures and can be referred to fig. 7 and 8, and the operation hole is communicated with the connecting hole 11, so that a user can conveniently disassemble and assemble the clamp spring 33 in the operation hole.

In the scheme, after the connecting rod 31 is unscrewed, the elastic piece 32 is in a compressed state, the effect of the elastic piece 32 on the connecting handle 20 is utilized, so that the first concave-convex surface 12 on the crank main shaft 10 is engaged with the second concave-convex surface 23 on the connecting handle 20, when the folding crank needs to be folded or unfolded, the connecting handle 20 is held to compress the elastic piece 32, after the second concave-convex surface on the connecting handle 20 is separated from the first concave-convex surface 12 on the crank main shaft 10, the connecting handle 20 can be rotated, when the crank rotates for about 90 degrees, the connecting handle 20 is released, the connecting handle 20 approaches to the crank main shaft 10 under the effect of the elastic piece 32, and the first concave-convex surface 12 on the crank main shaft 10 is engaged with the second concave-convex surface 23 on the connecting handle 20 again.

Because the first concave-convex surface 12 on the crank main shaft 10 is matched with the second concave-convex surface 23 on the connecting handle 20, after the connecting rod 31 and the crank main shaft 10 are relatively screwed, the crank main shaft 10 and the connecting handle 20 are relatively fixed, the connecting rod 31 is rotated to enable the connecting rod 31 to be loosened from the crank main shaft 10, and the second concave-convex surface 23 on the connecting handle 20 can be separated from the first concave-convex surface 12 on the crank main shaft 10 under the elasticity of the elastic piece 32 to relatively rotate, so that the connecting handle 20 and the crank main shaft 10 are positioned at two different positions, namely a folding crank unfolding state and a folding crank folding state. Referring to fig. 5 and 6, fig. 5 shows the pedals 40, the folding crank and the crank shaft on the same plane, the crank shaft is not shown in the figure, the pedals 40 are extended outwards, the folding crank is in the unfolded use state, and fig. 6 shows the folding crank in the folded state. The connecting rod 31 is loosened or locked by holding the big end part 311 of the connecting rod 31 to enable the connecting handle 20 and the crank main shaft 10 to be located at two different positions, so that the folding or unfolding of the folding crank is realized, and the folding crank is convenient to operate and reliable to use.

Example two

Referring to fig. 7 and 8, a folding crank comprises a crank spindle 10, a connecting handle 20 and a locking mechanism 50. The crank main shaft 10 is provided with a through hole 13 at one end, a first concave-convex surface 12 at one end face, the first concave-convex surface 12 is preferably square or trapezoidal concave-convex, the other end of the first concave-convex surface is arranged on a five-way pipe on a bicycle frame through a crank shaft, the crank shaft is not shown in the figure, the connecting handle 20 is provided with a connecting hole 24, a second concave-convex surface is arranged at one end of the connecting handle 20, the first concave-convex surface 12 is matched with the second concave-convex surface, a pedal mounting hole 22 is arranged at the side face of the connecting handle 20, and the pedal mounting hole 22 is used for mounting a pedal.

The locking mechanism 50 comprises a threaded rod 51 with a head and an elastic part 52, the elastic part 52 is sleeved on the rod part of the threaded rod 51 with a head, two ends of the elastic part 52 are respectively abutted against the crank spindle 10 and the head part of the threaded rod 51 with a head, the rod part of the threaded rod 51 with a head passes through the through hole 13 on the crank spindle 10, and the threaded rod 51 with a head is fixedly connected in the connecting hole 24 of the connecting handle 20 through threads, so that the crank spindle 10 is connected with the connecting handle 20. In the scheme, an operation hole is generally formed in the side part of the crank main shaft 10 and is communicated with the through hole 13, so that a user can conveniently assemble, disassemble and tighten the locking mechanism 50 in the operation hole.

In the scheme, the elastic element 52 is in a compressed state, the effect of the elasticity 52 on the crank spindle 10 is utilized to enable the first concave-convex surface 12 on the crank spindle 10 to be meshed with the second concave-convex surface on the connecting handle 20, when the folding crank needs to be folded or unfolded, the connecting handle 20 is held to compress the elastic element 52, after the second concave-convex surface on the connecting handle 20 is separated from the first concave-convex surface 12 on the crank spindle 10, the connecting handle 20 can be rotated, the connecting handle 20 is loosened when the crank is rotated by about 90 degrees, the connecting handle 20 is close to the crank spindle 10 under the effect of the elastic element 52, and the first concave-convex surface 12 on the crank spindle 10 is meshed with the second concave-convex surface on the connecting handle 20 again.

Because the first concave-convex surface 12 on the crank main shaft 10 is matched with the second concave-convex surface on the connecting handle 20, after the headed screw 51 is screwed with the connecting handle 20 relatively, the crank main shaft 10 and the connecting handle 20 are fixed relatively, the headed screw 51 is rotated to loosen the headed screw 51 from the connecting handle 20, and the second concave-convex surface on the connecting handle 20 can be separated from the first concave-convex surface 12 on the crank main shaft 10 and then rotated relatively under the action of overcoming the elastic force of the elastic piece 52, so that the connecting handle 20 and the crank main shaft 10 are positioned at two different positions, namely a folding crank unfolding state and a folding crank folding state. Referring to fig. 5 and 6, the folding or unfolding of the folding crank is realized, the operation is convenient, and the use is reliable.

EXAMPLE III

Referring to fig. 9 to 11, a folding crank comprises a crank spindle 10, a connecting handle 20, a dust-proof sleeve 90 and a locking mechanism 60. The crank main shaft 10 is provided with a connecting hole 11 at one end, an anti-falling screw thread hole is formed in the bottom of the connecting hole 11 of the crank main shaft 10, a first concave-convex surface 12 is arranged on the end face of the end, the first concave-convex surface 12 is preferably square or trapezoidal concave-convex, the other end of the first concave-convex surface is mounted on a five-way pipe on a bicycle frame through a crank shaft, the crank shaft is not shown in the figure, the connecting handle 20 is provided with a through hole 21, a second concave-convex surface is arranged at one end of the connecting handle 20, the first concave-convex surface 12 is matched with the second concave-convex surface, a pedal mounting hole 22 is formed in the side face of the connecting handle 20, and the pedal mounting hole 22 is used for mounting pedals. The dustproof sleeve 90 is sleeved at the joint of the crank main shaft 10 and the connecting handle 20 and used for isolating dust and preventing the dust from entering the crank main shaft 10.

Locking mechanism 60 includes connecting rod, elastic component 63 and anticreep screw 64, the connecting rod includes big end portion 62 and pole portion 61, be equipped with the counter bore on big end portion 62, big end portion 62 is equipped with threaded connection portion, pole portion 61 is equipped with the penetration hole, pole portion 61 one end is equipped with the external screw thread, and the other end is equipped with the internal thread, pole portion 61 and crank spindle 10 threaded connection, big end portion 62 and pole portion 61 threaded connection, elastic component 63 overlaps on locating pole portion 61, is located between big end portion 62 and the connection handle 20, and anticreep screw 64 passes counter bore on big end portion 62, the penetration hole on the pole portion 61 and the anticreep screw thread hole threaded connection on the crank spindle 10.

The anti-slip screw 64 is in a pre-locking state, namely the anti-slip screw does not abut against the large end part 62, the counter bore can be set to be in a hexagonal tool shape, a hexagonal wrench is used for loosening the large end part 62 until the large end part 62 abuts against the anti-slip screw 64, the large end part 62 is prevented from being completely loosened, the elastic part 63 changes from a high compression state to a low compression state, the connecting handle 20 is pushed, under the action of overcoming the elasticity of the elastic part 63, the second concave-convex surface on the connecting handle 20 is separated from the first concave-convex surface on the crank spindle 10 and then rotates relatively, folding of the folding crank is realized, the connecting handle 20 is loosened, the second concave-convex surface and the first concave-convex surface are meshed again under the action of the elastic part 63 of the connecting handle 20, when the folding crank needs to be unfolded, the connecting handle 20 is pushed to enable the second concave-convex surface on the connecting handle 20 to be separated from the first concave-convex surface on the crank spindle 10 and rotate by about 90 degrees, and the pedal arranged on the connecting handle 20 is unfolded, the big end part 62 is locked to relatively fix the crank main shaft 10 and the connecting handle 20. Convenient operation and reliable use.

Example four

Referring to fig. 12 and 13, a folding crank comprises a crank spindle 10, a connecting handle 20 and a locking mechanism 70. The crank main shaft 10 is provided with a connecting hole 11 at one end, a first concave-convex surface 12 at the end face, the first concave-convex surface 12 is preferably square or trapezoid concave-convex, the other end is mounted on a five-way pipe on a bicycle frame through a crank shaft, the crank shaft is not shown in the figure, the connecting handle 20 is provided with a through hole 21, a step is arranged in the through hole 21 of the connecting handle 20, a second concave-convex surface is arranged at one end of the connecting handle 20, an arc-shaped surface is arranged at the other end of the connecting handle, the first concave-convex surface 12 is matched with the second concave-convex surface, a pedal mounting hole 22 is arranged at the side face of the connecting handle 20, and the pedal mounting hole 22 is used for mounting a pedal.

Locking mechanism 70 includes quick detach eccentric handle 71, articulated shaft 72, connecting axle 73, spring 75 and screw 74, quick detach eccentric handle 71 is equipped with cam and handle, be equipped with the eccentric orfice on the cam, the articulated shaft 72 is located in the eccentric orfice, screw 74 and articulated shaft 72 fixed connection are passed through to the one end of connecting axle 73, the other end of connecting axle 73 passes through-

hole

21 and 11 fixed connection in connecting hole of crank main shaft 10, arcwall face and quick detach eccentric handle 71's cam cooperation, on the step in the connecting hole 21 of connecting handle 20 was located to spring 75, spring 75's both ends butt step and articulated shaft 72 respectively, and spring 75 plays the pretension effect. The quick-release eccentric handle 71 is rotated to push the connecting handle 20 to move up and down through the eccentric hole of the cam, so that the first concave-convex surface 12 on the crank spindle 10 is engaged with or separated from the second concave-convex surface on the connecting handle 20. Convenient operation and reliable use.

EXAMPLE five

Referring to fig. 14 to 17, a folding crank comprises a crank main shaft 10, a connecting handle 20 and a locking mechanism 80.

The crank main shaft 10 is provided with a connecting hole 11 at one end, the end face of the end is provided with a first concave-convex surface 12, the first concave-convex surface 12 is preferably square or trapezoid concave-convex, the other end is mounted on a five-way pipe on a bicycle frame through a crank shaft, the crank shaft is not shown in the figure, the crank main shaft 10 is provided with a push rod hole which is not shown in the figure, a push rod 14 is fixedly arranged in the push rod hole, the connecting handle 20 is provided with a through hole 21, one end of the connecting handle 20 is provided with a second concave-convex surface, the first concave-convex surface 12 is matched with the second concave-convex surface, one side face of the connecting handle 20 is provided with a pedal mounting hole 22, the pedal mounting hole 22 is used for mounting a pedal, the other side face of the connecting handle 20 is provided with an eccentric shaft hole 24, and the eccentric shaft hole 24 transversely penetrates through the connecting handle 20.

The locking mechanism 80 comprises an adjusting rod 81, an eccentric shaft 82, a rotating handle 83, an adjusting screw 84, a handle anti-tripping device 85 and a return spring 89. The adjusting rod 81 is provided with a shaft hole 811, one end of the adjusting rod 81 is provided with an adjusting inner threaded hole, the other end of the adjusting rod 81 is provided with an adjusting outer thread, the adjusting screw 84 is arranged in the adjusting inner threaded hole of the adjusting rod 81, the adjusting rod 81 is arranged in the through hole 21 of the connecting handle 20, the eccentric shaft 82 penetrates through the eccentric shaft hole 24 of the connecting handle 20 and the shaft hole 811 on the adjusting rod 81, the other end of the adjusting rod 81 is in threaded connection with the connecting hole 11 of the crank main shaft 10 through the adjusting outer thread, the rotating handle 83 is provided with a convex edge 831 and a fixing hole 832, the convex edge 831 is in a straight shape in the embodiment and can be in a cross shape and the like, the rotating handle 83 is fixed at one end of the eccentric shaft 82 through a screw 86 penetrating through the fixing hole 832, the end of the eccentric shaft 82 is provided with a groove which is matched with the convex edge 831, so that the rotating handle 83 can drive the eccentric shaft 82 to rotate synchronously, the other end of the eccentric shaft 82 is connected with an end screw 87 by a screw thread, so as to prevent the end of the eccentric shaft 82 from coming out of the eccentric shaft hole 24, if the end of the eccentric shaft is larger than the eccentric shaft hole 24, the end screw 87 can be omitted, the rotating handle 83 is further provided with an anti-tripping mounting hole 833, please refer to fig. 15, the handle anti-tripping device 85 is provided with a chute 851 and an anti-tripping groove 852, please refer to fig. 16, the chute 851 is provided with a convex part 853, the convex part 853 is provided with a fixing screw hole, the wall of the chute 851 is provided with a guide groove 855 for driving the rotating handle 83 to slide therein, the bottom of the chute 851 is provided with a blocking wall 854, the anti-tripping groove 852 is provided with an anti-tripping part 8522 and a mandril inlet 8521, the convex part 853 is arranged in the anti-tripping mounting hole 833 of the rotating handle 83, the anti-tripping mounting hole 833 is larger than the convex part 853, and the convex part 853 can slide in the anti-tripping mounting hole 853, anticreep screw 88 passes anticreep knot mounting hole 833 and is connected with the fixed screw hole on the convex part 853, is connected handle anticreep release 85 and twist grip 83, return spring 89 one end butt keeps off wall 854, and the bottom of other end butt convex part 853 makes handle anticreep release 85 and twist grip 83 have the trend of separating, ejector pin 14 passes through ejector pin entry 8521 and gets into anticreep groove 852, and under return spring's effect, ejector pin 14 slips to anticreep portion 8522, and the joint of ejector pin 14 is in anticreep groove 852, promotes return spring, makes ejector pin 14 break away from anticreep portion 8522, then ejector pin 14 can follow anticreep groove 852 and roll out.

The rotating handle 83 is rotated to drive the eccentric shaft 82 to rotate, so as to push the adjusting rod 81 to move, and drive the crank spindle 10 to move, so that the first concave-convex surface 12 on the crank spindle 10 is engaged with or separated from the second concave-convex surface on the connecting handle 20, and the tightness of the crank spindle 10 and the connecting handle 20 is realized.

It needs to explain very much, and pedal mounting structure is various, and one of them mounting means is introduced to this embodiment, is equipped with pedal mounting hole on the connection handle to this installation is pedal, and another kind of form is equipped with protruding structure on the connection handle, carries out fixed connection with pedal, the utility model discloses an invent point is not in the mounting structure of connection handle and pedal, and pedal mounting structure on the connection handle sets up according to the pedal needs of installation, for succinctly introducing the utility model discloses an invent point to the characteristics of each embodiment are highlighted, all enumerate the side of connecting the handle and be equipped with pedal mounting hole, consequently, pedal mounting hole is not the necessary technical characteristics of the utility model, explain very much here.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a folding crank, includes crank main shaft and connection handle, its characterized in that still includes locking mechanism, crank main shaft one end is equipped with first concavo-convex face, the one end of connection handle is equipped with the concavo-convex face of second, first concavo-convex face with the concavo-convex face cooperation of second, locking mechanism be used for with the connection handle can install in elasticity on the crank main shaft.

2. The folding crank of claim 1 wherein the locking mechanism comprises a connecting rod, one end of the crank spindle is provided with a connecting hole, the connecting rod is provided with a through hole, the connecting rod is arranged in the connecting hole of the crank spindle through the through hole to fix the crank spindle and the connecting rod relatively.

3. The folding crank of claim 2, wherein the locking mechanism further comprises an elastic member, the connecting rod is provided with a large end and a rod, the rod is provided with an external thread, the connecting hole on the crank spindle is a threaded hole, the elastic member is sleeved on the rod of the connecting rod, one end of the elastic member abuts against the large end of the connecting rod, and the other end of the elastic member abuts against the connecting handle.

4. The folding crank of claim 3, wherein the locking mechanism further comprises a snap spring, the rod portion is provided with a snap spring groove, and the snap spring is arranged in the snap spring groove to prevent one end of the connecting rod from falling off the crank spindle.

5. The folding crank of claim 1 wherein the locking mechanism comprises a headed screw and an elastic member, the headed screw passing through the through hole in the crank spindle and the elastic member and being fixedly disposed in the attachment hole in the attachment shank.

6. The folding crank of claim 1, wherein the locking mechanism comprises an anti-loosening screw and an elastic member, two ends of the elastic member respectively abut against the big head end and the connecting handle of the connecting rod, the connecting rod is provided with a through hole, the big head end is provided with a counter bore, and the anti-loosening screw penetrates through the through hole and is connected with the crank spindle.

7. The folding crank of claim 1, wherein the locking mechanism comprises a quick-release eccentric handle, an articulated shaft and a connecting shaft, the quick-release eccentric handle is provided with a cam and a handle, the cam is provided with an eccentric hole, the articulated shaft is arranged in the eccentric hole, the other end of the connecting handle is provided with an arc-shaped surface, the arc-shaped surface is matched with the cam of the quick-release eccentric handle, the connecting handle is provided with a through hole, one end of the crank spindle is provided with a connecting hole, one end of the connecting shaft is fixedly connected with the articulated shaft, and the other end of the connecting shaft penetrates through the through hole and is fixedly connected with the crank spindle.

8. The folding crank of claim 1 wherein said locking mechanism comprises an eccentric shaft, a turning handle and an adjusting lever, said adjusting lever is provided with a shaft hole, said connecting lever is provided with an eccentric shaft hole, said eccentric shaft is inserted through said shaft hole of said adjusting lever and is disposed in said eccentric shaft hole of said connecting lever, said adjusting lever is fixedly connected to said crank main shaft, and said turning handle is fixed to said eccentric shaft.

9. The folding crank of claim 8 wherein the locking mechanism further comprises an adjustment screw having an adjustment threaded internal hole at one end, the adjustment screw being received in the adjustment threaded internal hole.

10. The folding crank of any one of claims 1 to 9 further comprising a dust boot disposed on the crank spindle at a junction of the first and second male and female surfaces.