CN216805710U

CN216805710U - Sprocket crank convenient to dismouting

Info

Publication number: CN216805710U
Application number: CN202220241661.3U
Authority: CN
Inventors: 郝润波
Original assignee: Tianjin Kuayue Vehicle Industry Co ltd
Current assignee: Tianjin Kuayue Vehicle Industry Co ltd
Priority date: 2022-01-29
Filing date: 2022-01-29
Publication date: 2022-06-24
Anticipated expiration: 2032-01-29

Abstract

The utility model discloses a chain wheel crank convenient to disassemble and assemble, which comprises a chain wheel main body, a fixed crank and a movable crank, wherein limiting plates are fixedly welded on the outer walls of two sides of the chain wheel main body, a first thread groove is formed in the side wall of each limiting plate, a sleeve is attached to the side wall of each limiting plate, a first bolt matched with the first thread groove penetrates through the side wall of the sleeve, an extension rod is installed on the side wall of the sleeve, an end plate is installed at the end part of each extension rod, a second bolt penetrating through the end part of the fixed crank is connected with the side wall of each end plate in a threaded manner, a limiting strip is connected to the outer wall of the fixed crank in an integrated manner, the periphery of the fixed crank is connected with the movable crank in a sliding manner, and a third bolt is connected to the periphery of the movable crank in a threaded manner. The installation of being convenient for is fixed and dismantles, can change alone after damaging, and crank length can be adjusted as required, adapts to the children of different age brackets, and the economic nature is better.

Description

Sprocket crank convenient to dismouting

Technical Field

The utility model relates to the technical field of bicycle accessories, in particular to a sprocket crank convenient to disassemble and assemble.

Background

The bicycle crank assembly is provided with a crank and a chain wheel, when a bicycle is ridden, 180-degree angles are formed between the left crank and the right crank of the bicycle, a rider sits on a saddle, and the left crank and the right crank are treaded by double feet in parallel, so that the rotating surface of the left crank and the right crank drives the chain wheel of the bicycle to rotate to drive the bicycle to move.

Application number CN202023217406.5 discloses an assembled sprocket crank convenient to it is lubricated, including sprocket wheel body and sprocket crank, the internally mounted of assembly through-hole has hexagon socket head cap screw, and hexagon socket head cap screw's below is provided with the block track, the orbital internally mounted of block has the sprocket bent axle, and the front end of sprocket bent axle is provided with the external screw thread, the block arm is installed to the outer wall of sprocket bent axle, and the inside of sprocket bent axle is provided with the internal thread, sprocket crank is installed to the top of external screw thread, and sprocket crank's front end installs fixing bolt, the location pivot is installed to sprocket crank's below, and the running-board is installed to the outer wall of location pivot, the inside of running-board is provided with the lubrication hole, and the below of lubrication hole is provided with hollow through-hole. In this kind of assembled sprocket crank convenient to it is lubricated, through the lubrication hole that sets up, can pour into hollow through-hole with lubricated liquid through the lubrication hole to lubricate location pivot and hollow through-hole contact site.

The assembled chain wheel crank convenient for lubrication in the technology has the following defects: the saddle height-adjusting of children with the bicycle is limited, and sprocket crank's length can't be adjusted, and children develop sooner, therefore children are with the bicycle and are eliminated sooner, lead to children to use the bicycle economy inadequately, can not adjust bicycle sprocket crank's length according to children's actual demand that uses the car. Therefore, the chain wheel crank convenient to disassemble and assemble is provided.

Disclosure of Invention

The utility model mainly aims to provide a chain wheel crank convenient to disassemble and assemble, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a sprocket crank convenient to dismouting, includes the sprocket main part, still includes fixed crank and movable crank, the equal welded fastening of both sides outer wall of sprocket main part has a limiting plate, the lateral wall structure of limiting plate has first thread groove, the lateral wall laminating of limiting plate has the sleeve, telescopic lateral wall wears to be equipped with the first bolt with first thread groove adaptation, the extension rod is installed to telescopic lateral wall, the end plate is installed to the tip of extension rod, the lateral wall threaded connection of end plate has the second bolt of wearing to establish the fixed crank tip, fixed crank's outer wall is connected with spacing through integrated into one piece, fixed crank's periphery sliding connection has movable crank, movable crank's periphery threaded connection has the third bolt, the tip and the spacing butt of third bolt.

Furthermore, spacing strip sets up in the one side that fixed crank kept away from the sprocket main part, facilitates the use spanner fastening third bolt to adjust fixed crank and movable crank's relative position.

Furthermore, the lateral wall of the movable crank is rotatably connected with a pedal through a pin shaft, the two ends of the pedal are both in an arc shape, the ankle of the child is not easy to be injured by the pedal at the arc end part, and the protection performance is better.

Further, the periphery of limiting plate is constructed with the spacing groove that the annular array distributes, telescopic interior week integrated into one piece have with the arch of spacing groove adaptation, spacing groove and bellied cooperation make the sleeve be difficult for producing the phenomenon of skidding with the limiting plate.

Further, the inner peripheral diameter of sleeve equals with the outer peripheral diameter size of limiting plate, and the sleeve can laminate each other with the limiting plate.

Further, the sprocket body is configured with sprocket teeth on an outer periphery thereof.

Compared with the prior art, the utility model has the following beneficial effects: the fixed crank and the chain wheel main body are convenient to mount and fix and also convenient to dismount through the limiting plate, the limiting groove, the first thread groove, the first bolt, the extension rod, the end plate and the second bolt, and can be replaced independently after being damaged; through the fixed crank, the movable crank, the limiting strip and the third bolt that set up, be convenient for adjust fixed crank and movable crank's relative position for children can be better with the running-board contact drive sprocket main part rotate, adapt to the children of different age brackets, need not to change the bicycle, improve economic nature.

Drawings

Fig. 1 is a schematic view of the whole structure of a sprocket crank easy to disassemble and assemble according to the present invention.

Fig. 2 is a schematic structural diagram of a limiting plate of the sprocket crank convenient to disassemble and assemble.

FIG. 3 is an enlarged view of the structure of FIG. 1A of a sprocket crank of the present invention for easy disassembly and assembly.

In the figure: 1. a sprocket body; 2. a limiting plate; 3. a limiting groove; 4. a first thread groove; 5. a sleeve; 6. a first bolt; 7. an extension pole; 8. an end plate; 9. a second bolt; 10. fixing a crank; 11. a limiting strip; 12. a third bolt; 13. a movable crank; 14. a foot pedal.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

As shown in fig. 1-3, a sprocket crank convenient to dismouting, includes sprocket main body 1, still includes fixed crank 10 and movable crank 13, sprocket main body 1's both sides outer wall all welded fastening has limiting plate 2, limiting plate 2's lateral wall structure has first thread groove 4, limiting plate 2's lateral wall laminating has sleeve 5, sleeve 5's lateral wall is worn to be equipped with first bolt 6 with first thread groove 4 adaptation, extension rod 7 is installed to sleeve 5's lateral wall, end plate 8 is installed to the tip of extension rod 7, end plate 8's lateral wall threaded connection has the second bolt 9 of wearing to establish fixed crank 10 tip, fixed crank 10's outer wall is connected with spacing strip 11 through integrated into one piece, fixed crank 10's periphery sliding connection has movable crank 13, movable crank 13's periphery threaded connection has third bolt 12, the end of the third bolt 12 abuts against the limit strip 11.

The limiting strip 11 is arranged on one side, far away from the chain wheel main body 1, of the fixed crank 10, and a wrench is convenient to use to fasten the third bolt 12 so as to adjust the relative positions of the fixed crank 10 and the movable crank 13.

The side wall of the movable crank 13 is rotatably connected with a pedal 14 through a pin shaft, two ends of the pedal 14 are both in an arc shape, the pedal 14 at the end of the arc shape is not easy to hurt the ankle of the child, and the protection performance is better.

Wherein, the periphery of limiting plate 2 is constructed with spacing groove 3 that the annular array distributes, the interior week integrated into one piece of sleeve 5 has the arch with 3 adaptations of spacing groove, and spacing groove 3 makes sleeve 5 be difficult for producing the phenomenon of skidding with limiting plate 2 with bellied cooperation.

Wherein, the interior circumference diameter of sleeve 5 equals with limiting plate 2's periphery diameter size, and sleeve 5 can laminate each other with limiting plate 2.

Wherein the sprocket body 1 is configured with sprocket teeth on its outer periphery.

It should be noted that, the utility model is a sprocket crank convenient to disassemble and assemble, when in installation, the sleeve 5 is attached to the limiting plate 2, the first bolt 6 is screwed into the first thread groove 4 through the sleeve 5, the second bolt 9 is screwed with the end plate 8 through the fixed crank 10, the length of the leg of a child is changed after the child develops, the third bolt 12 is loosened, the movable crank 13 is shifted to one side of the sprocket main body 1, the third bolt 12 is screwed after the movable crank 13 slides for a certain length along the limiting strip 11, and the total length of the movable crank 13 and the fixed crank 10 is shortened.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sprocket crank convenient to dismouting, includes sprocket main body (1), its characterized in that still includes fixed crank (10) and movable crank (13), the equal welded fastening of both sides outer wall of sprocket main body (1) has limiting plate (2), the lateral wall of limiting plate (2) is constructed first thread groove (4), the lateral wall laminating of limiting plate (2) has sleeve (5), first bolt (6) with first thread groove (4) adaptation are worn to be equipped with by the lateral wall of sleeve (5), extension rod (7) are installed to the lateral wall of sleeve (5), end plate (8) are installed to the tip of extension rod (7), the lateral wall threaded connection of end plate (8) has second bolt (9) of wearing to establish fixed crank (10) tip, the outer wall of fixed crank (10) is connected with spacing (11) through integrated into one piece, the periphery sliding connection of fixed crank (10) has movable crank (13), the periphery of the movable crank (13) is in threaded connection with a third bolt (12), and the end part of the third bolt (12) is abutted to the limiting strip (11).

2. A sprocket crank for facilitating disassembly and assembly as set forth in claim 1, wherein: the limiting strip (11) is arranged on one side, far away from the chain wheel main body (1), of the fixed crank (10).

3. A sprocket crank for facilitating disassembly and assembly as set forth in claim 1, wherein: the side wall of the movable crank (13) is rotatably connected with a pedal (14) through a pin shaft, and two ends of the pedal (14) are both arc-shaped.

4. A sprocket crank for facilitating disassembly and assembly as set forth in claim 1, wherein: the limiting plate is characterized in that limiting grooves (3) distributed in an annular array are formed in the periphery of the limiting plate (2), and protrusions matched with the limiting grooves (3) are integrally formed in the inner periphery of the sleeve (5).

5. A sprocket crank for facilitating disassembly and assembly as set forth in claim 1, wherein: the inner peripheral diameter of the sleeve (5) is equal to the outer peripheral diameter of the limiting plate (2).

6. A sprocket crank for facilitating disassembly and assembly as defined in claim 1, wherein: the sprocket body (1) is configured with sprocket teeth on the outer periphery.