CN211844755U

CN211844755U - Vertical pipe folding joint for folding bicycle

Info

Publication number: CN211844755U
Application number: CN202021649337.2U
Authority: CN
Inventors: 郑宏宇
Original assignee: Kunshan Jinghongli Hardware Technology Co ltd
Current assignee: Kunshan Jinghongli Hardware Technology Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2020-11-03
Anticipated expiration: 2030-08-10

Abstract

The utility model provides a joint is folded to riser for folding car, including lower chuck, go up chuck and locking mechanical system, locking mechanical system includes the hasp, spring and lockpin, through making hasp and last chuck looks pivot joint, make the spring have the trend of driving the hasp to the axial lead direction pivoted that is close to last chuck, make the lockpin rotationally set up on lower chuck, and set up first bulge and second bulge on the lockpin, when changing locking mechanical system to locking state, can drive the clearance between the rotation axial lead of first bulge crowded hasp and lockpin, produce interference fit, thereby make the hasp straining and keep on the lockpin, the security is higher; when the locking mechanism is changed to the unlocking state, the first protruding part can be driven to be separated from the gap through the rotation of the lock pin, and the second protruding part is driven to abut against the lock catch, so that the lock catch rotates towards the direction far away from the axis of the upper chuck, the separation of the lock catch and the lock pin is completed, and the operation is convenient.

Description

Vertical pipe folding joint for folding bicycle

Technical Field

The utility model relates to a folding car field, concretely relates to joint is folded to riser for folding car.

Background

The folding bicycle belongs to a bicycle and generally comprises a frame folding joint and a stand pipe folding joint, wherein the frame folding joint is used for folding a frame, two front wheels and two rear wheels are folded together in half to reduce the length of the folding bicycle, and the stand pipe folding joint is used for folding a handlebar and a connecting pipe of a saddle to reduce the height of the folding bicycle.

The joint is folded to current riser when the locking, and the hasp is in clearance fit or normal fit state with the lockpin, at the in-process of riding, can make the clearance increase between hasp and the lockpin owing to jolting, rocking, serious, still can make hasp and lockpin break away from, and the security is poor, and when the unblock, the hasp is stirred to the needs manual work mostly, because the region at hasp place is comparatively narrow and small, operates inconveniently and has the potential safety hazard when stirring.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of prior art, provide a higher and convenient operation's of security riser folding joint for folding car.

In order to achieve the above object, the utility model discloses a technical scheme is, a joint is folded to riser for folding car, include:

the lower chuck is detachably fixed on the frame of the folding bicycle;

the upper chuck is connected with the lower chuck through a first shaft in a pivot mode, the upper chuck is provided with a first working position and a second working position, when the upper chuck is located at the first working position, the lower end face of the upper chuck is attached to the upper end face of the lower chuck, and the axial lead of the upper chuck is overlapped with the axial lead of the lower chuck; when the upper chuck is at a second working position, the lower end surface of the upper chuck and the upper end surface of the lower chuck are positioned on the same horizontal plane, and the axial lead of the upper chuck is parallel to the axial lead of the lower chuck;

a locking mechanism for locking said upper jaw in said first operating position, said locking mechanism having a locked state and an unlocked state, said locking mechanism being located on opposite sides of said first shaft, said locking mechanism comprising a catch, a spring and a locking pin;

the lock catch is pivotally connected with the upper chuck through a second shaft, the spring is arranged between the lock catch and the upper chuck, and the spring has a tendency of driving the lock catch to rotate towards the direction close to the axial lead of the upper chuck;

the lock pin is rotatably arranged on the lower chuck and is provided with a first protruding part and a second protruding part, when the locking mechanism is in a locking state, the first protruding part is squeezed into a gap between the lock catch and a rotating axis of the lock pin, so that the lock catch is fastened and kept on the lock pin, when the locking mechanism is in an unlocking state, the first protruding part is separated from the gap, and the second protruding part props against the lock catch, so that the lock catch rotates towards a direction far away from the axis of the upper chuck, and the lock catch is separated from the lock pin.

Preferably, the middle part of the lock pin is an eccentric shaft with a reduced diameter, and the outer circumferential surface of the eccentric shaft far away from the axis of the lock pin forms the first protruding part.

Preferably, a shifting piece is arranged on the lock pin, the shifting piece and the lock pin are kept relatively fixed, and the end part of the shifting piece, which is far away from the axis of the lock pin, forms the second protruding part.

Preferably, the axis of the second shaft is parallel to the axis of the first shaft.

Preferably, the axis of rotation of the locking pin is parallel to the axis of the second shaft.

Preferably, the included angle between the first protrusion and the second protrusion is 90 °.

Further preferably, the locking mechanism further comprises a handle for driving the lock pin to rotate, the handle is fixed to two end portions of the lock pin, and an avoiding groove for avoiding the lock catch is formed in the handle.

Further preferably, at least one end of the lock pin is a straight prism, a through hole matched with the straight prism is formed in the handle, and the straight prism is inserted into the through hole.

Further preferably, a safety groove is formed in the lock catch, a safety catch is arranged on the handle, and when the locking mechanism is in a locked state, the safety catch is inserted into the safety groove to play a safety role.

Further preferably, the safety catch is slidably disposed on the handle, and the handle is further provided with an elastic element for driving the safety catch to slide in a direction of being inserted into the safety slot.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

Drawings

Fig. 1 is a schematic front view of a preferred embodiment of the present invention, wherein the upper jaw is in a first working position and the locking mechanism is in a locked state.

Fig. 2 is a schematic bottom view of fig. 1.

Fig. 3 is a schematic sectional view in the direction of a-a in fig. 2.

Fig. 4 is a schematic front view of the preferred embodiment of the present invention, wherein the upper jaw is in the first operating position and the locking mechanism is in the unlocked position.

Fig. 5 is a bottom view of fig. 4.

Fig. 6 is a schematic cross-sectional view taken along the direction B-B in fig. 5.

Fig. 7 is a schematic front view of the preferred embodiment of the present invention, wherein the upper jaw is in the second operating position and the locking mechanism is in the unlocked position.

Fig. 8 is a bottom view of fig. 7.

Fig. 9 is a schematic cross-sectional view in the direction C-C in fig. 8.

Fig. 10 and 11 are enlarged perspective views of the locking mechanism in fig. 1.

Wherein: 10. a lower chuck; 11. a first shaft; 12. an upper end surface; 20. an upper chuck; 21. a lower end face; 22. a riser; 30. a locking mechanism; 31. locking; 311. a second shaft; 312. a safety groove; 32. a spring; 33. a lock pin; 331. a first projecting portion; 332. a second projection; 333. an eccentric shaft; 334. a shifting sheet; 3341. a square through hole; 335. a right prism; 336. a cylinder; 34. a handle; 341. an avoidance groove; 342. a square through hole; 343. a safety buckle; 3431. an elastic member; 344. a circular through hole.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make clear and definite definitions of the protection scope of the present invention.

As shown in fig. 1-9, the present invention provides a riser folding joint for a folding cart, comprising: the lower chuck 10, the upper chuck 20 and the locking mechanism 30, wherein the lower chuck 10 is detachably fixed on a frame of the folding cart, a first shaft 11 is arranged on an outer wall of one side of the lower chuck 10, an axial line of the first shaft 11 is perpendicular to an axial line of the lower chuck 10, the upper chuck 20 is detachably connected with a vertical pipe 22 of the folding cart, the upper chuck 20 and the lower chuck 10 are pivotally connected through the first shaft 11, the upper chuck 20 has a first working position and a second working position, as shown in fig. 1-9, when the upper chuck 20 is in the first working position, a lower end face 21 of the upper chuck 20 is attached to an upper end face 12 of the lower chuck 10, and an axial line of the upper chuck 20 is overlapped with an axial line of the lower chuck 10; when the upper chuck 20 is at the second working position, the lower end surface 21 of the upper chuck 20 and the upper end surface 12 of the lower chuck 10 are located on the same horizontal plane, and the axial line of the upper chuck 20 is parallel to the axial line of the lower chuck 10.

The locking mechanism 30 is used for locking the upper chuck 20 at a first working position, the locking mechanism 30 has a locking state and an unlocking state, the locking mechanism 30 is located at the opposite side of the first shaft 11, the locking mechanism 30 comprises a latch 31, a spring 32 and a lock pin 33, wherein the latch 31 is pivotally connected with the upper chuck 20 through a second shaft 311, the axis of the second shaft 311 is parallel to the axis of the first shaft 11, the spring 32 is a torsion spring, the spring 32 is arranged between the latch 31 and the upper chuck 20, specifically, the spring 32 is sleeved on the second shaft 311, and the spring 32 has a tendency of driving the latch 31 to rotate towards the direction close to the axis of the upper chuck 20; the lock pin 33 is rotatably disposed on the lower chuck 10 along its axis, the rotation axis of the lock pin 33 is parallel to the axis of the second shaft 311, the lock pin 33 has a first protrusion 331 and a second protrusion 332, when the locking mechanism 30 is changed to the locking state, the lock pin 33 rotates to drive the first protrusion 331 to intrude into the gap between the lock catch 31 and the rotation axis of the lock pin 33, so as to generate an interference fit, so that the lock catch 31 is fastened and held on the lock pin 33, when the locking mechanism 30 is changed to the unlocking state, the lock pin 33 rotates in the opposite direction to drive the first protrusion 331 to disengage from the gap, and drive the second protrusion 332 to abut against the lock catch 31, so that the lock catch 31 rotates in the direction away from the axis of the upper chuck 20, so as to disengage the lock catch 31 from the lock pin 33.

In this embodiment, as shown in fig. 3, 6, 9 and 10-11, the two ends of the lock pin 33 are respectively a cylinder 336 and a straight prism 335, the middle of the lock pin 33 is a reduced diameter eccentric shaft 333, the reduced diameter eccentric shaft 333 means that the diameter of the eccentric shaft 333 is smaller than the diameter of the two ends of the lock pin 33, the axis of the eccentric shaft 333 is located on one side of the axis of the lock pin 33, and the outer circumferential surface of the eccentric shaft 333 away from the axis of the lock pin 33 forms a first protrusion 331.

In this embodiment, as shown in fig. 3, 6, 9, and 10-11, the lock pin 33 is provided with a dial 334, the dial 334 is provided with a square through hole 3341 for the straight prism 335 to pass through, the straight prism 335 passes through the square through hole 3341, so that the dial 334 and the lock pin 33 are relatively fixed, when the lock pin 33 rotates, the dial 334 can be driven to rotate, a second protruding portion 332 is formed at an end of the dial 334 away from an axial line of the lock pin 33, and an included angle between the second protruding portion 332 and the first protruding portion 331 is 90 °.

In this embodiment, as shown in fig. 1 to 11, the locking mechanism 30 further includes a handle 34 for driving the lock pin 33 to rotate, the handle 34 is fixed to two end portions of the lock pin 33, specifically, the handle 34 is provided with a circular through hole 344 and a square through hole 342, the cylinder 336 of the lock pin 33 passes through the circular through hole 344, the straight prism 335 of the lock pin 33 passes through the square through hole 342, so that the handle 34 is erected on the two end portions of the lock pin 33, the handle 34 is provided with an avoiding groove 341 for avoiding the lock catch 31, and the avoiding groove 341 is located between the circular through hole 344 and the square through hole 342.

In the present embodiment, as shown in fig. 3, 6, 9 and 10-11, in order to further enhance the safety, the lock catch 31 is provided with a safety groove 312, the handle 34 is provided with a safety catch 343, when the locking mechanism 30 is in the locked state, one end of the safety catch 343 is inserted into the safety groove 312 to prevent the lock catch 31 from rotating, so as to achieve the safety function, in order to enable the safety catch 343 to be inserted into the safety groove 312 while the locking mechanism 30 is locked, the safety catch 343 is slidably provided on the handle 34, and the handle 34 is further provided with an elastic member 3431 for driving the safety catch 343 to slide in the direction of being inserted into the safety groove 312.

The utility model provides a folding joint of riser for folding car, through making hasp and last chuck looks pivotal connection, make the spring have the trend that orders about the hasp to the axial lead direction pivoted that is close to last chuck, make the lockpin rotationally set up on lower chuck, and set up first bulge and second bulge on the lockpin, when changing locking mechanical system to locking state, can drive the clearance between the axial lead of rotation of first bulge crowded hasp and lockpin through the rotation of lockpin, produce interference fit, thereby make the hasp straining and keep on the lockpin, the security is higher; when the locking mechanism is changed to the unlocking state, the first protruding part can be driven to be separated from the gap through the rotation of the lock pin, and the second protruding part is driven to abut against the lock catch, so that the lock catch rotates towards the direction far away from the axis of the upper chuck, the separation of the lock catch and the lock pin is completed, and the operation is convenient.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A riser folding joint for a folding cart, comprising:

the lower chuck is detachably fixed on the frame of the folding bicycle;

the method is characterized in that:

2. The riser folding joint for a folding cart of claim 1, characterized in that: the middle part of the lock pin is an eccentric shaft with a reduced diameter, and the outer circumferential surface of the eccentric shaft, which is far away from the axis of the lock pin, forms the first protruding part.

3. The riser folding joint for a folding cart of claim 1, characterized in that: the lock pin is provided with a shifting piece, the shifting piece and the lock pin are relatively fixed, and the end part of the shifting piece, which is far away from the axis of the lock pin, forms the second protruding part.

4. The riser folding joint for a folding cart of claim 1, characterized in that: the axis of the second shaft is parallel to the axis of the first shaft.

5. The riser folding joint for a folding cart of claim 1, characterized in that: the axis of rotation of the lock pin is parallel to the axis of the second shaft.

6. The riser folding joint for a folding cart of claim 1, characterized in that: the included angle between the first protruding portion and the second protruding portion is 90 degrees.

7. The riser folding joint for a folding cart according to any one of claims 1 to 6, characterized in that: the locking mechanism further comprises a handle used for driving the lock pin to rotate, the handle is fixed on two end portions of the lock pin, and an avoiding groove used for avoiding the lock catch is formed in the handle.

8. The riser folding joint for a folding cart of claim 7, characterized in that: at least one end part of the lock pin is a straight prism, a through hole matched with the straight prism is formed in the handle, and the straight prism is inserted into the through hole.

9. The riser folding joint for a folding cart of claim 7, characterized in that: the handle is provided with a safety catch, the locking mechanism is arranged in the handle, and the safety catch is inserted into the safety catch to play a safety role when the locking mechanism is in a locking state.

10. The riser folding joint for a folding cart of claim 9, characterized in that: the safety buckle is slidably arranged on the handle, and the handle is further provided with an elastic piece for driving the safety buckle to slide in the direction of inserting into the safety slot.