Transposition crank with internal pressure spring sliding sleeve

Abstract

The utility model is applicable to the field of cranks, and provides a transposition crank with an internal pressure spring sliding sleeve, which comprises a crank middle section, the two ends of the crank middle section are slidably connected with sliding sleeves, the two ends of the crank middle section are rotatably provided with crank lower sections, and the side surfaces of the crank lower sections close to the sliding sleeves are fixedly connected with convex blocks. A groove matched with the protruding block is formed in the sliding sleeve, and when the protruding block is connected with the groove in a clamped mode, the crank lower section is located at a working position. When the folding crank is folded, the sliding sleeve is shifted to enable the convex block on the crank lower section to be separated from the groove in the sliding sleeve, and then the crank lower section is rotated, so that the crank lower section can be folded, and the crank lower section can be conveniently packaged.

Description

Technical Field

[0001] The utility model belongs to the field of cranks, and in particular relates to a transfer crank equipped with an inner pressure spring sliding sleeve. Background Art

[0002] The crank is a kind of accessory in the bicycle chainring. A bicycle, also known as a bicycle or a bike, is usually a small two-wheeled land vehicle. After riding on the bicycle, people use pedals as power. Bicycles are green and environmentally friendly means of transportation. With the development of society, more and more people use bicycles as fitness equipment for cycling exercise and bicycle travel.

[0003] For the production of cranks, traditional appearance design and craftsmanship have been used for many years. For the installation position of the pedals, most of them adopt the production process of flattening, drilling and tapping the tail end of the cranks, so as to produce pedal holes with tooth patterns. When the bicycle is assembled and packed, the pedals cannot be installed directly, otherwise the two sides of the bicycle outer box will protrude, affecting the packing and the overall appearance and volume of the carton. Therefore, customers are usually required to assemble it by themselves after purchase, or ask someone to assemble it. However, this method has the risk of customers being unable to assemble it due to poor tooth patterns.

[0004] In order to avoid the above technical problems, it is necessary to provide an indexing crank equipped with an internal pressure spring sliding sleeve to overcome the above defects in the prior art. Utility Model Content

[0005] The utility model aims to provide a transfer crank equipped with an inner pressure spring sliding sleeve, aiming to solve the problem that the pedal cannot be directly installed when the bicycle is transported.

[0006] The utility model is implemented as follows: a transfer crank equipped with an internal pressure spring sliding sleeve comprises a crank middle section, both ends of the crank middle section are slidably connected with the sliding sleeve, both ends of the crank middle section are rotatably mounted with a crank lower section, a pedal hole is provided on the crank lower section, the pedal hole is used to install the pedal, a protrusion is fixedly connected to the side of the crank lower section close to the sliding sleeve, the sliding sleeve is provided with a groove matched with the protrusion, when the protrusion is engaged with the groove, the crank lower section is in a working position, when the protrusion is pulled out of the groove, the crank lower section can be rotated, and the transfer and folding of the crank lower section can be completed.

[0007] A further technical solution is that a step is provided on the middle section of the crank, and a compression spring is sleeved on the middle section of the crank, one end of the compression spring abuts on the step, and an accommodating groove is provided at the end of the sliding sleeve, the compression spring is located inside the accommodating groove, and the other end of the compression spring abuts against the side wall of the accommodating groove. Under the action of the compression spring, the sliding sleeve and the lower section of the crank are tightly attached together, thereby making the installation of the lower section of the crank more stable.

[0008] A further technical solution is that a No. 1 mounting groove is provided at the end of the middle section of the crank, a connecting pin is installed inside the No. 1 mounting groove, an inner ring groove is provided inside the lower section of the crank, both ends of the connecting pin extending out of the middle section of the crank extend into the inner ring groove, the connecting pin can rotate in the inner ring groove to prevent the lower section of the crank from falling off the middle section of the crank, and a mounting hole is provided on the lower section of the crank.

[0009] A further technical solution is that a No. 2 installation groove is provided on the middle section of the crank, a positioning pin is installed inside the No. 2 installation groove, and a waist-shaped groove is provided on the sliding sleeve. One end of the positioning pin extending out of the No. 2 installation groove extends into the waist-shaped groove, and the sliding sleeve can slide along the waist-shaped groove, and the positioning pin can prevent the sliding sleeve from escaping from the middle section of the crank.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] The utility model provides a transfer crank equipped with an internal pressure spring sliding sleeve. When folding, the sliding sleeve is moved to make the protrusion on the lower section of the crank disengage from the groove on the sliding sleeve, and then the lower section of the crank is rotated, so that the lower section of the crank can be folded, which is convenient for packaging and avoids the situation where the pedal cannot be installed due to poor tooth pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0014] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0015] Figure 4 It is a schematic diagram of the three-dimensional structure of the lower section of the crank of the utility model.

[0016] In the attached drawings: 1. middle section of crank; 2. sliding sleeve; 3. lower section of crank; 4. protrusion; 5. groove; 6. compression spring; 7. accommodating groove; 8. connecting pin; 9. inner ring groove; 10. mounting hole; 11. positioning pin; 12. waist-shaped groove. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0019] like Figure 1-4 As shown, a transfer crank equipped with an internal pressure spring sliding sleeve provided by the utility model includes a crank middle section 1, both ends of the crank middle section 1 are slidably connected with sliding sleeves 2, both ends of the crank middle section 1 are rotatably installed with crank lower sections 3, a pedal hole is provided on the crank lower section 3, and the pedal hole is used to install the pedal, the side of the crank lower section 3 close to the sliding sleeve 2 is fixedly connected with a protrusion 4, the sliding sleeve 2 is provided with a groove 5 matched with the protrusion 4, when the protrusion 4 is engaged with the groove 5, the crank lower section 3 is in the working position, when the protrusion 4 is pulled out of the groove 5, the crank lower section 3 can be rotated, and then the transfer and folding of the crank lower section 3 can be completed.

[0020] In the embodiment of the present utility model, Figure 3 As shown, as a preferred embodiment of the utility model, a step is provided on the crank middle section 1, and a compression spring 6 is sleeved on the crank middle section 1, one end of the compression spring 6 abuts on the step, and a receiving groove 7 is provided at the end of the sliding sleeve 2, the compression spring 6 is located inside the receiving groove 7, and the other end of the compression spring 6 abuts against the side wall of the receiving groove 7. Under the action of the compression spring 6, the sliding sleeve 2 and the crank lower section 3 are tightly attached together, so that the crank lower section 3 is installed more firmly.

[0021] In the embodiment of the present utility model, Figure 2-3 As shown, as a preferred embodiment of the utility model, a mounting groove No. 1 is provided at the end of the crank middle section 1, and a connecting pin 8 is installed inside the mounting groove No. 1. An inner ring groove 9 is provided inside the crank lower section 3, and both ends of the connecting pin 8 extending out of the crank middle section 1 extend into the inner ring groove 9. The connecting pin 8 can rotate in the inner ring groove 9 to prevent the crank lower section 3 from falling off the crank middle section 1. A mounting hole 10 is provided on the crank lower section 3, and the mounting hole 10 is connected with the inner ring groove 9. When installing the crank lower section 3, the crank lower section 3 is firstly put on the crank middle section 1, and then the connecting pin 8 is inserted into the mounting groove No. 1 from the mounting hole 10, and then the crank lower section 3 is rotated, and the connecting pin 8 can be immersed in the inner ring groove 9.

[0022] In the embodiment of the present utility model, Figure 1-4 As shown, as a preferred embodiment of the utility model, a No. 2 mounting groove is provided on the crank middle section 1, a positioning pin 11 is installed inside the No. 2 mounting groove, a waist-shaped groove 12 is provided on the sliding sleeve 2, one end of the positioning pin 11 extending out of the No. 2 mounting groove extends into the waist-shaped groove 12, the sliding sleeve 2 can slide along the waist-shaped groove 12, and the positioning pin 11 can prevent the sliding sleeve 2 from escaping from the crank middle section 1.

[0023] When assembling the indexing crank equipped with the internal pressure spring sliding sleeve 2, first put the compression spring 6 on the crank middle section 1, then put it into the sliding sleeve 2, then insert the positioning pin 11 from the waist groove 12 into the No. 2 mounting groove, and then install the crank lower section 3, and finally insert the connecting pin 8 from the mounting hole 10 into the No. 1 mounting groove, so that the connecting pin 8 is completely immersed in the inner ring groove 9, and then rotate the crank lower section 3 to make the protrusion 4 on it engage with the groove 5 on the sliding sleeve 2 to complete the assembly; when folding, move the sliding sleeve 2 to make the protrusion 4 on the crank lower section 3 disengage from the groove 5 on the sliding sleeve 2, and then rotate the crank lower section 3, so that the crank lower section 3 can be folded for easy packaging.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A indexing crank with an internal pressure spring sliding sleeve, comprising a crank middle section, characterized in that: Both ends of the crank middle section are slidably connected with sliding sleeves, and both ends of the crank middle section are rotatably installed with crank lower sections. The side of the crank lower section close to the sliding sleeve is fixedly connected with a protrusion, and the sliding sleeve is provided with a groove matched with the protrusion. When the protrusion is engaged with the groove, the crank lower section is in a working position.

2. The indexing crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: A step is arranged on the middle section of the crank, and a compression spring is sleeved on the middle section of the crank. One end of the compression spring abuts against the step. A receiving groove is opened at the end of the sliding sleeve. The compression spring is located inside the receiving groove, and the other end of the compression spring abuts against the side wall of the receiving groove.

3. The indexing crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: A mounting groove No. 1 is provided at the end of the middle section of the crank, a connecting pin is installed inside the mounting groove No. 1, an inner ring groove is provided inside the lower section of the crank, and both ends of the connecting pin extending out of the middle section of the crank extend into the inner ring groove.

4. The indexing crank with internal pressure spring sliding sleeve according to claim 3, characterized in that: The lower section of the crank is provided with a mounting hole matched with the connecting pin.

5. The indexing crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: A No. 2 mounting groove is provided on the middle section of the crank, a positioning pin is installed inside the No. 2 mounting groove, a waist-shaped groove is provided on the sliding sleeve, and one end of the positioning pin extending out of the No. 2 mounting groove extends into the waist-shaped groove.

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