CN2677284Y - Rotary crank for folding bicycle - Google Patents

Abstract

The utility model relates to a rotary crank for folding bicycle comprising an upper portion (1) of a crank, a lower portion of the crank (2), a big end locking bolt (3), an anti-loosing torque force compressed spring (4), an adjusting cushion ring (5), etc. The utility model has simple structure, easy operation, low manufacture cost and easy popularization and the width size after the folding of the folding bicycle can be reduced.

Description

The folding bicycle rotary crank

Technical field the utility model relates to a kind of folding bicycle rotary crank.

The folding pedals that the folding bicycle of the existing domestic production of background technology adopts in order to reduce folding back width dimensions, complex structure, complex operation, the manufacturing cost height, the width dimensions after folding is also bigger.

The summary of the invention the purpose of this utility model is: a kind of maneuverable folding bicycle rotary crank that reduces width dimensions behind the bicycle folding simple in structure is provided, the technical solution of the utility model is: crank is divided on the crank under (1) and crank (2), and (1) is processed with central axis hole (A), pin hole (B), negative thread (C) and right side or rear side is processed with cylindrical protrusion negative thread (D) or short endoporus (E) of cylindrical protrusion or the long endoporus of cylindrical protrusion (K) on the crank; Under the crank (2) be processed with pedal screw thread (G) that pedal (15) is installed and and the external screw thread (F) of negative thread (C) coaxial line and the same pitch and lock shrinkage pool (H); Being tightened in the external screw thread (F) of (2) under the negative thread (C) of (1) on the crank and the crank together, the back makes pedal screw thread (G) according to the correct installation direction reprocessing of pedal screw thread (G), perhaps align packing ring (5) levelling with several pieces and make the pedal screw thread of making earlier (G) in the right direction, the right side by (1) on the crank or the cylindrical protrusion negative thread (D) of rear side or the short endoporus (E) of cylindrical protrusion or the long endoporus of cylindrical protrusion (K) coaxial line bore to external screw thread (F) and lock shrinkage pool (H); For become flexible (2) under (1) and the crank on the anti-crank, adopt following three kinds of lock methods respectively: first kind is major part lock(ing) bolt (3) to be screwed into withstand locking shrinkage pool (H) in the cylindrical protrusion negative thread (D), perhaps major part lock(ing) bolt (3) is put locking torsion compressing spring (4) and be screwed into and withstand locking shrinkage pool (H) in the cylindrical protrusion negative thread (D), two of locking torsion compressing spring (4) is inserted respectively in the following mounting hole (L) and the last mounting hole (M) on the major part lock(ing) bolt (3) on the cylindrical protrusion negative thread (D); Second kind is short lock pin (6) running-fit that aperture (I) arranged to be packed into to withstand in the short endoporus of cylindrical protrusion (E) lock shrinkage pool (H), the pivot pole that has little slotted hole (J) (7) is welded on (1) on the crank, when being contained in short lock pin (6) aperture (I) lining and the little slotted hole of pivot pole (7) (J) lining with two major part pins (9), lever (8) loads onto torsion spring (10), insert respectively in the left mounting hole (N) and the right mounting hole (0) on the lever (8) on the pivot pole (7) at two of torsion spring (10), flat in case return the other end of two major part pins (9) towards riveting, short lock pin (6) is pressed closer lock shrinkage pool (H); The third is that long lock pin (11), compressing spring (12) running-fit are enclosed in the long endoporus of cylindrical protrusion (K), withstand locking shrinkage pool (H), screw on behind the union cap (UC) (13), the draw ring (14) of can droping to the ground is contained in the through hole (P) on the long lock pin (11), long lock pin (11) is pressed closer lock shrinkage pool (H).The beneficial effects of the utility model are: simple in structure, operation easily can reduce the folding back of folding bicycle width dimensions, and low cost of manufacture is easy to promote the use of.

Description of drawings Fig. 1 be folding bicycle with behind (2) pedal (15) Rotate 180 under first kind of lock method of rotary crank and the crank ° by the front view of 1: 1 ratio picture.

Fig. 2 is the folding bicycle front view of second kind of lock method of rotary crank in 1: 1 ratio picture.

Fig. 3 is the folding bicycle front view of the third lock method of rotary crank in 1: 1 ratio picture.

Part sequence number is as follows among the figure: (2), major part lock(ing) bolt (3) under (1), the crank, locking torsion compressing spring (4), levelling packing ring (5), short lock pin (6), pivot pole (7), lever (8), major part pin (9), torsion spring (10), long lock pin (11), compressing spring (12), union cap (UC) (13), the draw ring (14) of can droping to the ground, pedal (15) on the crank; Central axis hole (A), pin hole (B), negative thread (C), cylindrical protrusion negative thread (D), cylindrical protrusion are lacked endoporus (E), external screw thread (F), pedal screw thread (G), locking shrinkage pool (H), aperture (I), little slotted hole (J), the long endoporus of cylindrical protrusion (K), following mounting hole (L), are gone up mounting hole (M), left mounting hole (N), right mounting hole (0), through hole (P).

The specific embodiment is unclamped major part lock(ing) bolt (3) with the right hand as shown in Figure 1, makes it be separated from the locking shrinkage pool and pulls pedal (15) Rotate 180 ° with left hand (H) time, and it is crouched in folding bicycle.

As shown in Figure 2, pressing lever (8) to make it be separated from the locking shrinkage pool with the right hand pulls pedal (15) Rotate 180 with left hand (H) time and ° it is crouched in folding bicycle.

As shown in Figure 3, make it be separated from the locking shrinkage pool to pull pedal (15) Rotate 180 with left hand (H) time and ° it is crouched in folding bicycle with the right hand pull-up draw ring (14) of can droping to the ground.

Claims (6)

1, a kind of folding bicycle comprises central axis hole (A), pin hole (B) and pedal screw thread (G) with rotary crank, it is characterized in that: crank is divided on the crank under (1) and crank (2), (1) is processed with negative thread (C) on the crank, (2) are processed with the external screw thread (F) with negative thread (C) coaxial line and the same pitch under the crank, and the external screw thread (F) under negative thread on the crank on (1) (G) and the crank on (2) is tightened in together.

2, folding bicycle rotary crank according to claim 1 is characterized in that: make pedal screw thread (G) or align packing ring (5) levelling with several pieces making the pedal screw thread (G) of processing earlier in the right direction according to the correct installation direction reprocessing of pedal screw thread (G).

3, folding bicycle rotary crank according to claim 1, it is characterized in that: on the crank right side of (1) or rear side have with crank under the cylindrical protrusion negative thread (D) of locking shrinkage pool (H) coaxial line on the external screw thread (F) on (2), major part lock(ing) bolt (3) is screwed into cylindrical protrusion negative thread (D) and withstands locking shrinkage pool (H).

4, folding bicycle rotary crank according to claim 1, it is characterized in that: on the crank right side of (1) or rear side have with crank under the cylindrical protrusion negative thread (D) of locking shrinkage pool (H) coaxial line on the external screw thread (F) on (2), major part lock(ing) bolt (3) puts locking torsion compressing spring (4) and is screwed into cylindrical protrusion negative thread (D) and withstands locking shrinkage pool (H), and insert respectively in the following mounting hole (L) and the last mounting hole (M) on the major part lock(ing) bolt (3) on the cylindrical protrusion negative thread (D) at two of locking torsion compressing spring (4).

5, folding bicycle rotary crank according to claim 1, it is characterized in that: on the crank right side of (1) or rear side have with crank under the short endoporus (E) of cylindrical protrusion of locking shrinkage pool (H) coaxial line on the external screw thread (F) on (2), short lock pin (6) running-fit that is processed with aperture (I) is packed into and is withstood locking shrinkage pool (H) in the short endoporus of cylindrical protrusion (E), the pivot pole (7) that has little slotted hole (J) be welded on crank (1), lever (8) is contained in aperture (I) lining of short lock pin (6) with two major part pins (9) running-fit, and little slotted hole (J) lining on the pivot pole (7) time and the major part pin (9) on the pivot pole (7) load onto torsion spring (10) with one heart and two of torsion spring (10) inserted respectively in the left mounting hole (N) and the right mounting hole (0) on the lever (8) on the pivot pole (7), the other end of two major part pins (9) is flat towards riveting.

6, folding bicycle rotary crank according to claim 1, it is characterized in that: on the crank right side of (1) have with crank under the long endoporus of cylindrical protrusion (H) of locking shrinkage pool (H) coaxial line on the external screw thread (F) on (2), long lock pin (11), compressing spring (12) running-fit are enclosed in and withstand locking shrinkage pool (H) in the long endoporus of cylindrical protrusion (K), screw on behind the union cap (UC) (13), the draw ring (14) of can droping to the ground is contained in the through hole (P) on the long lock pin (11).

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