CN218141965U

CN218141965U - Crank mechanism and bicycle with same

Info

Publication number: CN218141965U
Application number: CN202221764934.9U
Authority: CN
Inventors: 赵兰敏; 周旺; 赵天奇
Original assignee: Xingtai Jintian Children's Products Co ltd
Current assignee: Xingtai Jintian Children's Products Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-12-27
Anticipated expiration: 2032-07-08

Abstract

The utility model discloses a crank mechanism and have its bicycle. The crank mechanism comprises a crank, a middle shaft and a quick-release assembly. The crank comprises a main body and a hollow connecting column, a connecting hole is formed in the axial direction of the hollow connecting column, and a mounting hole communicated with the connecting hole is formed in the radial direction of the hollow connecting column; the middle shaft is provided with a locking hole corresponding to the mounting hole; the quick release assembly comprises a hoop sleeve and a locking piece, wherein the hoop sleeve is provided with a first position for locking the locking piece and enabling the locking piece to be simultaneously inserted into the mounting hole and the locking hole so as to lock and connect the middle shaft to the crank; the hoop sleeve is provided with an avoiding locking piece and unlocks the locking piece so as to detach the middle shaft from the crank at a second position, and the hoop sleeve can reciprocate along the axial direction of the hollow connecting column to switch between the first position and the second position. The utility model discloses can solve the bicycle occupation space among the prior art big, the problem of depositing is not convenient for.

Description

Crank mechanism and bicycle with same

Technical Field

The application relates to the technical field of vehicles, in particular to a crank mechanism and a bicycle with the same.

Background

The cranks of the existing bicycles and children bicycles in the market need to be installed by professionals, the installed pedals are the wider positions next to the handlebar in the bicycle body, and the bicycles occupy larger space and are not convenient to store.

SUMMERY OF THE UTILITY MODEL

The utility model provides a main aim at provides a crank mechanism and have its bicycle, and crank mechanism can solve the bicycle occupation space among the prior art big, the problem of not being convenient for deposit.

According to an aspect of an embodiment of the present application, there is provided a crank mechanism including:

the crank comprises a main body and a hollow connecting column, the hollow connecting column is vertically connected to one end of the main body, a connecting hole is formed in the axial direction of the hollow connecting column, and a mounting hole communicated with the connecting hole is formed in the radial direction of the hollow connecting column;

one end of the middle shaft is detachably inserted into the connecting hole, and a locking hole corresponding to the mounting hole is formed in the middle shaft; and

the quick-release assembly comprises a hoop sleeve and a locking piece, the hoop sleeve is sleeved on the periphery of the hollow connecting column, and the locking piece is mounted in the mounting hole;

the hoop sleeve is provided with a first position for locking the locking piece and enabling the locking piece to be simultaneously inserted into the mounting hole and the locking hole so as to lock and connect the middle shaft on the crank; the hoop sleeve is also provided with a second position for avoiding the locking piece and unlocking the locking piece so as to detach the middle shaft from the crank, and the hoop sleeve can reciprocate along the axis direction of the hollow connecting column so as to switch between the first position and the second position.

Furthermore, the quick-release assembly further comprises an elastic element, the elastic element is sleeved on the hollow connecting column, and two ends of the elastic element respectively abut against the hollow connecting column and the hoop sleeve.

Furthermore, a first limiting step is arranged on the hollow connecting column, a second limiting step is arranged on the inner wall surface close to one end of the middle shaft in the hoop sleeve mode, the elastic element is a spring, and two ends of the spring respectively abut against the first limiting step and the second limiting step.

Furthermore, an annular bulge is arranged on the inner wall of the hoop sleeve, and when the annular bulge stops at the end part of the connecting hole, the hoop sleeve is located at the first position;

when the annular bulge avoids the end part of the connecting hole, the hoop sleeve is located at the second position.

Further, the crank mechanism further comprises a limiting part, and the limiting part is arranged on the hollow connecting column to prevent the hoop from falling off from the hollow connecting column.

Further, the hollow connecting column is far away from one end of the main body is provided with an annular groove, and the limiting part is a stop snap spring embedded in the annular groove.

Further, the locking piece is a locking steel ball or a locking pin.

Furthermore, a connecting section is arranged on the middle shaft, the connecting hole is a square hole, and the connecting section is a square connecting section matched with the square hole.

Furthermore, each side of the square connecting section is provided with the locking hole, and the connecting hole on the hollow connecting column and the locking piece are arranged in one-to-one correspondence with the locking hole.

In another aspect, the present application further provides a bicycle comprising a crank mechanism as described above.

Compared with the prior art, the technical scheme of the application has at least the following technical effects:

because the utility model provides a crank mechanism is provided with the quick detach subassembly, removes along the axis direction of hollow spliced pole through the cuff in making the quick detach subassembly, can make the cuff switch between primary importance and second place, and then can carry out locking or unblock to the locking piece, and then be convenient for dismantle the axis from the crank or connect the axis locking on the crank. That is to say, the user only needs to remove the hoop and can carry out the dismouting of axis, simple structure, convenient operation. When will the utility model provides a back is installed in the bicycle to the crank mechanism, when actually depositing the bicycle, only need with the axis from the crank dismantle can, the occupation space of bicycle is little, more is suitable for and deposits.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural diagram of a crank mechanism disclosed in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a crank mechanism disclosed in an embodiment of the present application at a hollow connecting post;

FIG. 3 is a first exploded view of the crank mechanism disclosed in the embodiments of the present application;

fig. 4 is a second exploded view of the crank mechanism disclosed in the embodiment of the present application.

Wherein the figures include the following reference numerals:

10. a crank; 11. a main body; 12. a hollow connecting column; 121. connecting holes; 122. mounting holes; 123. a first limit step; 124. an annular groove; 20. a middle shaft; 21. a connection section; 211. a locking hole; 30. a quick release assembly; 31. a hoop cover; 311. a second limit step; 312. an annular projection; 32. a locking member; 33. an elastic element; 40. a stopper.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Referring to fig. 1-4, according to an embodiment of the present application, a crank mechanism is provided that includes a crank 10, a central shaft 20, and a quick release assembly 30.

Specifically, the crank 10 comprises a main body 11 and a hollow connecting column 12, wherein the hollow connecting column 12 is vertically connected to one end of the main body 11, a connecting hole 121 is formed in the axial direction of the hollow connecting column 12, and a mounting hole 122 communicated with the connecting hole 121 is formed in the radial direction of the hollow connecting column 12; one end of the middle shaft 20 is detachably inserted into the connecting hole 121, and the middle shaft 20 is provided with a locking hole 211 corresponding to the mounting hole 122 corresponding to the connecting hole 121; the quick release assembly 30 comprises a collar 31 and a locking member 32, the collar 31 is sleeved on the periphery of the hollow connecting column 12, and the locking member 32 is mounted in the mounting hole 122. In practical use, the hoop 31 has a first position for locking the locking member 32 and allowing the locking member 32 to be inserted into the mounting hole 122 and the locking hole 211 simultaneously, so as to lock and connect the middle shaft 20 to the crank 10; the hoop 31 also has a second position for avoiding the lock member 32 and unlocking the lock member 32 to detach the bottom bracket 20 from the crank 10, and the hoop 31 is reciprocally movable in the axial direction of the hollow connecting post 12 to switch between the first position and the second position.

Because the crank mechanism in this embodiment is provided with the quick release assembly 30, the hoop 31 in the quick release assembly 30 can be switched between the first position and the second position by moving the hoop 31 along the axial direction of the hollow connecting column 12, so as to lock or unlock the locking member 32, thereby facilitating to detach the middle shaft 20 from the crank 10 or lock and connect the middle shaft 20 to the crank 10. That is to say, the user only needs to remove the hoop cover 31 to disassemble and assemble the middle shaft 20, and the structure is simple and the operation is convenient. When the crank mechanism in this embodiment is installed in a bicycle, the middle shaft 20 only needs to be detached from the crank 10 to store the bicycle, so that the bicycle occupies a small space and is more suitable for storage.

Furthermore, the main body 11 in this embodiment is substantially a rod-shaped structure, and the hollow connecting column 12 is vertically connected to one end of the main body 11 and integrally formed with the main body 11, so that the structure is stable and reliable. Of course, in other embodiments of the present application, the hollow connecting column 12 may also be fixedly connected to the main body 11 by means of snap, welding, screwing, etc., and any other modifications under the concept of the present application are within the scope of the present application.

Further, the quick release assembly 30 in this embodiment further includes an elastic element 33, the elastic element 33 is sleeved on the hollow connection column 12, and two ends of the elastic element 33 respectively abut against the hollow connection column 12 and the hoop 31. Specifically, the hollow connecting column 12 is provided with a first limiting step 123, the inner wall surface of the hoop 31 is provided with a second limiting step 311, the elastic element 33 is a spring, and two ends of the spring respectively abut against the first limiting step 123 and the second limiting step 311. Of course, in other embodiments of the present application, the elastic element 33 may also be an elastic pad, such as a rubber pad or the like.

Under the natural state, the hoop 31 is in the first position by the action of the elastic element 33, and at this time, the hoop 31 locks the locking member 32, and the locking member 32 can be simultaneously inserted into the mounting hole 122 and the locking hole 211, so that the middle shaft 20 can be locked and connected to the crank 10. When the middle shaft 20 needs to be detached from the crank 10, only an external force needs to be applied to the hoop sleeve 31 to enable the hoop sleeve 31 to move along the axis direction of the hollow connecting column 12, when the hoop sleeve 31 moves to avoid the unlocking stopping piece 32, the locking piece 32 can be unlocked, at the moment, the middle shaft 20 is pulled, and the middle shaft 20 can be detached from the locking piece 32 and the crank 10.

The hoop 31 in this embodiment is provided with an annular protrusion 312 on the inner wall near one end of the middle shaft 20, and when the annular protrusion 312 stops at the end of the connecting hole 121, the hoop 31 is in the first position; when the annular projection 312 clears the end of the attachment aperture 121, the collar 31 is in the second position. In this embodiment, the annular protrusion 312 is disposed to stop the connecting hole 121, so that the structure is simple and the implementation is convenient.

Alternatively, the locking member 32 in the present application may be a locking ball or a locking pin. In the embodiment, the locking member 32 is a locking steel ball, and the locking member 32 is configured as the locking steel ball, so that when the bottom bracket 20 is detached from the crank 10, the resistance between the locking member 32 and the bottom bracket 20 can be reduced, and the bottom bracket 20 can be more easily detached from the crank 10.

Further, the crank mechanism in the present application further includes a limiting member 40, and the limiting member 40 is disposed on the hollow connection column 12 to prevent the collar 31 from falling off from the hollow connection column 12. Specifically, one end of the hollow connecting column 12, which is far away from the main body 11, is provided with an annular groove 124, and the limiting member 40 is a stop snap spring embedded in the annular groove 124. When the limiting part 40 is installed, the limiting part 40 protrudes out of the outer surface of the hollow connecting column 12, the hoop sleeve 31 can be stopped, the hoop sleeve 31 is prevented from being detached from the hollow connecting column 12, and the structure is simple and convenient to achieve.

Further, the connecting section 21 is arranged on the middle shaft 20 in the application, the connecting hole 121 is a square hole (i.e., a hole with a square cross section), the connecting section 21 is a square connecting section (i.e., a connecting section with a square cross section) matched with the square hole, and through the mutual matching effect of the square hole and the square connecting section, after the middle shaft 20 is connected to the hollow connecting column 12, the middle shaft 20 can be prevented from rotating relative to the hollow connecting column 12. Of course, in other embodiments of the present application, the connecting segment 21 and the connecting hole 121 may also be other non-circular holes.

Optionally, each side of the square connecting section in this embodiment is provided with a locking hole 211, and correspondingly, the mounting hole 122 and the locking piece 32 on the hollow connecting column 12 are all provided in one-to-one correspondence with the locking hole 211, that is, the four locking holes 211, the mounting hole 122 and the locking piece 32 in this embodiment are all four, and the four locking pieces 32 are installed in the four locking pieces 32 in one-to-one correspondence, so that the central shaft 20 can be locked from the four sides of the square connecting section, and the structure is stable and reliable.

The assembling and disassembling process of the crank mechanism in the present embodiment will be described in detail in conjunction with the above structure as follows:

during assembly, the elastic element 33 is firstly sleeved on the hollow connecting column 12, the locking piece 32 is arranged in the locking hole 211, the hoop sleeve 31 is sleeved on the hollow connecting column 12, and then the limiting piece 40 is arranged in the annular groove 124, so that the hoop sleeve 31 is locked and limited on the hollow connecting column 12. Then, an external force is applied to the hoop 31 to switch the hoop 31 to the second position, at this time, the connecting section 21 of the middle shaft 20 is inserted into the connecting hole 121, and then the external force applied to the hoop 31 is removed, and the hoop 31 can be switched to the first position under the action of the elastic element 33 to lock the middle shaft 20, thereby completing the assembly of the crank mechanism.

When the crank is disassembled, the hoop sleeve 31 is acted by external force, the hoop sleeve 31 is switched to the second position along the axis direction of the hollow connecting column 12, at the moment, the middle shaft 20 is pulled, and the middle shaft 20 can be disassembled from the crank 10.

On the other hand, according to the embodiments of the present application, there is also provided a bicycle, which includes a crank mechanism, and the crank mechanism is the crank mechanism in the above embodiments, so that the bicycle in this embodiment includes all the technical effects of the crank mechanism in the above embodiments, and since the technical effects of the crank mechanism have been described in detail in the foregoing, the detailed description is omitted here.

For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A crank mechanism, comprising:

the crank (10), the crank (10) comprises a main body (11) and a hollow connecting column (12), the hollow connecting column (12) is vertically connected to one end of the main body (11), a connecting hole (121) is formed in the axial direction of the hollow connecting column (12), and a mounting hole (122) communicated with the connecting hole (121) is formed in the radial direction of the hollow connecting column (12);

the middle shaft (20), one end of the middle shaft (20) is detachably inserted into the connecting hole (121), and a locking hole (211) corresponding to the mounting hole (122) is formed in the middle shaft (20); and

the quick release assembly (30) comprises a hoop sleeve (31) and a locking piece (32), the hoop sleeve (31) is sleeved on the periphery of the hollow connecting column (12), and the locking piece (32) is installed in the installation hole (122);

the hoop sleeve (31) is provided with a first position for locking the locking piece (32) and enabling the locking piece (32) to be simultaneously inserted into the mounting hole (122) and the locking hole (211) so as to lock and connect the middle shaft (20) on the crank (10); the hoop (31) is also provided with a second position for avoiding the locking piece (32) and unlocking the locking piece (32) so as to detach the middle shaft (20) from the crank (10), and the hoop (31) can reciprocate along the axial direction of the hollow connecting column (12) to switch between the first position and the second position.

2. Crank mechanism according to claim 1, characterized in that the quick release assembly (30) further comprises a resilient element (33), the resilient element (33) is sleeved on the hollow connection column (12), and two ends of the resilient element (33) respectively abut against the hollow connection column (12) and the hoop (31).

3. A crank mechanism as claimed in claim 2, characterized in that the hollow connecting column (12) is provided with a first limit step (123), the inner wall surface of the collar (31) is provided with a second limit step (311), the elastic element (33) is a spring, and two ends of the spring respectively abut against the first limit step (123) and the second limit step (311).

4. Crank mechanism according to claim 1, characterized in that the collar (31) is provided with an annular protrusion (312) on the inner wall adjacent to one end of the middle shaft (20), the collar (31) being in the first position when the annular protrusion (312) stops at the end of the connection hole (121);

when the annular protrusion (312) is retreated from the end of the connecting hole (121), the hoop (31) is in the second position.

5. The crank mechanism according to claim 1, further comprising a stopper (40), wherein the stopper (40) is disposed on the hollow connecting post (12) to prevent the collar (31) from falling off the hollow connecting post (12).

6. The crank mechanism according to claim 5, wherein the hollow connecting column (12) is provided with an annular groove (124) at an end thereof away from the main body (11), and the stopper (40) is a stopper snap spring embedded in the annular groove (124).

7. Crank mechanism according to one of claims 1 to 6, characterized in that the locking means (32) is a locking ball or a locking pin.

8. Crank mechanism according to one of claims 1 to 6, characterized in that the middle shaft (20) is provided with a connecting section (21), the connecting hole (121) is a square hole, and the connecting section (21) is a square connecting section adapted to the square hole.

9. Crank mechanism according to claim 8, characterized in that the locking holes (211) are provided on each side of the square connecting section, and the connecting holes (121) on the hollow connecting post (12) and the locking pieces (32) are provided in one-to-one correspondence with the locking holes (211).

10. A bicycle, characterized in that the bicycle comprises a crank mechanism as claimed in any one of claims 1 to 9.