Foldable crank with internal pressure spring sliding sleeve

Abstract

The utility model is applicable to the field of cranks, and provides a foldable crank matched with an internal pressure spring sliding sleeve, which comprises a crank middle section, kidney-shaped shafts are arranged at two ends of the crank middle section, sliding sleeves are connected onto the kidney-shaped shafts in a sliding manner, kidney-shaped holes matched with the kidney-shaped shafts are formed in the sliding sleeves, and the sliding sleeves are connected with the kidney-shaped shafts in a sliding manner. One end of the kidney-shaped shaft is rotationally connected with a crank lower section, and the crank lower section is fixed to the sliding sleeve in an inserted mode. When the bicycle pedal is folded, the sliding sleeve is shifted to separate the sliding sleeve from the lower section of the crank, then the lower section of the crank is rotated until the bicycle pedal is parallel to a bicycle body, and then the sliding sleeve is loosened, so that the operation of folding the pedal can be completed, the bicycle pedal is folded, the bicycle is convenient to package, the pedal does not need to be detached, and the operation is convenient. And the situation that the user needs to assemble the device by himself / herself is

Description

Technical Field

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

[0002] The crank is a type of bicycle accessory. It is the part that connects the pedals and the chainring. It is used to transfer the kinetic energy from the pedals to the chainring, and then the kinetic energy from the chainring is transferred to the driving wheel of the bicycle through the chain, thereby making the bicycle move forward. The crank is the input structure of the bicycle power.

[0003] When transporting bicycles, in order to protect the bicycle frame, the bicycles usually need to be assembled and packed. However, the pedals cannot be installed directly during packing, otherwise the two sides of the bicycle outer box will protrude, affecting the packing and the overall appearance and volume of the carton. The pedals on the bicycle may also collide with external objects, causing damage to the pedals. Therefore, after arrival, users or professionals are usually required to assemble the pedals, which is very inconvenient.

[0004] In order to avoid the above technical problems, it is necessary to provide a foldable 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 foldable crank equipped with an inner pressure spring sliding sleeve, aiming to solve the problem that pedals cannot be directly installed when packing.

[0006] The utility model is implemented as follows: a foldable crank equipped with an internal pressure spring sliding sleeve comprises a crank middle section, both ends of the crank middle section are provided with a waist-shaped shaft, the waist-shaped shaft is slidably connected with a sliding sleeve, the sliding sleeve is provided with a waist-shaped hole matched with the waist-shaped shaft, one end of the waist-shaped shaft is rotatably connected with a crank lower section, the crank lower section is provided with a pedal hole, the pedal hole is used to install a bicycle pedal, the crank lower section is fixed to the sliding sleeve by plugging, the sliding sleeve is moved to separate the sliding sleeve from the crank lower section, and then the crank lower section can be rotated to realize the folding of the bicycle pedal.

[0007] According to a further technical solution, a waist-shaped boss is provided at one end of the lower crank section close to the sliding sleeve, a waist-shaped blind hole is provided on the side of the sliding sleeve, and the waist-shaped boss is inserted into the waist-shaped blind hole, thereby fixing the lower crank section and the sliding sleeve.

[0008] A further technical solution is that an annular groove No. 1 is provided at the end of the waist-shaped shaft, and a limiting hole is provided on the lower section of the crank. The axis of the limiting hole is perpendicular to the axis of the waist-shaped shaft, and a limiting pin is inserted into the inside of the limiting hole. The limiting pin is slidably connected in the annular groove No. 1, thereby preventing the lower section of the crank from escaping from the waist-shaped shaft.

[0009] A further technical solution is that a compression spring is sleeved on the waist-shaped shaft, and a receiving groove is opened on the side of the sliding sleeve. The compression spring is located in the receiving groove, one end of the compression spring abuts against the side of the middle section of the crank, and the other end of the compression spring abuts against the side wall of the receiving groove. Under the action of the compression spring, the sliding sleeve tightly fixes the lower section of the crank.

[0010] A further technical solution is that a No. 2 annular groove is provided at the end of the middle section of the crank, and a rubber ring is provided inside the No. 2 annular groove. The rubber ring is located at the end of the accommodating groove of the sliding sleeve, thereby preventing external dust from entering the accommodating groove. The rubber ring will increase the friction between the sliding sleeve and the middle section of the crank, making it difficult for the sliding sleeve to detach from the lower section of the crank, and the rubber ring also plays a damping role.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] The utility model provides a foldable crank equipped with an internal pressure spring sliding sleeve. When folding the pedal, the sliding sleeve is pushed to separate the sliding sleeve and the lower section of the crank, and then the lower section of the crank is rotated until the bicycle pedal is parallel to the bicycle body, and then the sliding sleeve is released to complete the pedal folding operation. The bicycle pedal can be folded up, which is convenient for packaging the bicycle without removing the pedal, thereby avoiding the need for users to assemble it themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0015] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure of the middle section of the crank of the utility model;

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the sliding sleeve of the utility model;

[0018] Figure 6 It is a schematic diagram of the three-dimensional structure of the lower section of the crank of the utility model.

[0019] In the attached drawings: 1. middle section of crank; 2. waist-shaped shaft; 3. sliding sleeve; 4. waist-shaped hole; 5. lower section of crank; 6. waist-shaped boss; 7. waist-shaped blind hole; 8. No. 1 annular groove; 9. limiting hole; 10. limiting pin; 11. compression spring; 12. accommodating groove; 13. rubber ring; 14. No. 2 annular groove. DETAILED DESCRIPTION

[0020] 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.

[0021] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1-6 As shown, a foldable crank with an internal pressure spring sliding sleeve provided by the utility model comprises a crank middle section 1, both ends of the crank middle section 1 are provided with a waist-shaped shaft 2, a sliding sleeve 3 is slidably connected to the waist-shaped shaft 2, a waist-shaped hole 4 matched with the waist-shaped shaft 2 is provided on the sliding sleeve 3, one end of the waist-shaped shaft 2 is rotatably connected to a crank lower section 5, a pedal hole is provided on the crank lower section 5, and the pedal hole is used to install a bicycle pedal, the crank lower section 5 is fixed to the sliding sleeve 3 by plugging, the sliding sleeve 3 is moved to disengage the sliding sleeve 3 from the crank lower section 5, and then the crank lower section 5 can be rotated to realize the folding of the bicycle pedal.

[0023] In the embodiment of the present utility model, Figure 5-6 As shown, as a preferred embodiment of the utility model, a waist-shaped boss 6 is provided at one end of the crank lower section 5 close to the sliding sleeve 3, a waist-shaped blind hole 7 is opened on the side of the sliding sleeve 3, and the waist-shaped boss 6 is inserted into the waist-shaped blind hole 7, so as to fix the crank lower section 5 and the sliding sleeve 3.

[0024] In the embodiment of the present utility model, Figure 1 , Figure 4 and Figure 6 As shown, as a preferred embodiment of the utility model, an annular groove No. 8 is provided at the end of the waist-shaped shaft 2, and a limiting hole 9 is provided on the crank lower section 5. The axis of the limiting hole 9 is perpendicular to the axis of the waist-shaped shaft 2, and a limiting pin 10 is inserted into the limiting hole 9. The limiting pin 10 is slidably connected in the annular groove No. 8, thereby preventing the crank lower section 5 from escaping from the waist-shaped shaft 2.

[0025] In the embodiment of the present utility model, Figure 3 As shown, as a preferred embodiment of the utility model, a compression spring 11 is sleeved on the waist-shaped shaft 2, and a receiving groove 12 is opened on the side of the sliding sleeve 3. The compression spring 11 is located in the receiving groove 12, and one end of the compression spring 11 abuts against the side of the crank middle section 1, and the other end of the compression spring 11 abuts against the side wall of the receiving groove 12. Under the action of the compression spring 11, the sliding sleeve 3 tightly fixes the crank lower section 5.

[0026] In the embodiment of the present utility model, Figure 3-4 As shown, as a preferred embodiment of the utility model, a second annular groove 14 is provided at the end of the crank middle section 1, and a rubber ring 13 is provided inside the second annular groove 14. The rubber ring 13 is located at the end of the accommodating groove 12 of the sliding sleeve 3, thereby preventing external dust from entering the accommodating groove 12, and the rubber ring 13 will increase the friction between the sliding sleeve 3 and the crank middle section 1, so that the sliding sleeve 3 is not easy to detach from the crank lower section 5, and the rubber ring 13 also plays a damping role.

[0027] When assembling the foldable crank equipped with the inner pressure spring sliding sleeve 3, the rubber ring 13 is installed first, and then the compression spring 11 is put on the waist-shaped shaft 2, and then the sliding sleeve 3 is put on the waist-shaped shaft 2, and then the crank lower section 5 is inserted, and the limiting hole 9 is aligned with the No. 1 annular groove 8, and then the limiting pin 10 is inserted into the limiting hole 9, so as to fix the crank lower section 5 and complete the assembly; when folding the pedal, the sliding sleeve 3 is moved to separate the sliding sleeve 3 and the crank lower section 5, and then the crank lower section 5 is rotated until the bicycle pedal is parallel to the bicycle body, and then the sliding sleeve 3 is released to complete the folding of the pedal. The bicycle pedal can be folded up, which is convenient for packaging the bicycle, and the pedal does not need to be disassembled, avoiding the need for users to assemble it themselves.

[0028] 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.

[0029] 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 foldable crank with an internal pressure spring sliding sleeve, comprising a crank middle section, characterized in that: Both ends of the middle section of the crank are provided with a waist-shaped shaft, a sliding sleeve is slidably connected to the waist-shaped shaft, a waist-shaped hole matched with the waist-shaped shaft is opened on the sliding sleeve, one end of the waist-shaped shaft is rotatably connected to the lower section of the crank, and the lower section of the crank is fixed to the sliding sleeve by plugging.

2. The foldable crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: A waist-shaped boss is arranged at one end of the lower section of the crank close to the sliding sleeve, a waist-shaped blind hole is opened on the side of the sliding sleeve, and the waist-shaped boss is inserted into the waist-shaped blind hole.

3. The foldable crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: An annular groove No. 1 is provided at the end of the waist-shaped shaft, and a limiting hole is provided on the lower section of the crank. The axis of the limiting hole is perpendicular to the axis of the waist-shaped shaft. A limiting pin is inserted into the limiting hole, and the limiting pin is slidably connected in the annular groove No.

1.

4. The foldable crank with internal pressure spring sliding sleeve according to claim 1, characterized in that: A compression spring is sleeved on the waist-shaped shaft, a receiving groove is opened on the side of the sliding sleeve, the compression spring is located in the receiving groove, one end of the compression spring abuts against the side of the middle section of the crank, and the other end of the compression spring abuts against the side wall of the receiving groove.

5. The foldable crank with internal pressure spring sliding sleeve according to claim 4, characterized in that: A second annular groove is provided at the end of the middle section of the crank, a rubber ring is provided inside the second annular groove, and the rubber ring is located at the end of the accommodating groove.

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