CN2322880Y

CN2322880Y - Frame tube turning locking device for folding bicycle

Info

Publication number: CN2322880Y
Application number: CN 97248935
Authority: CN
Inventors: 谢匆
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-03
Filing date: 1997-12-03
Publication date: 1999-06-09
Anticipated expiration: 2007-12-03

Abstract

The utility model relates to a frame tube turning locking device for folding bicycles, which comprises a front tube and a rear tube; the front tube and the rear tube can be oppositely folded; the front tube and the rear tube respectively form thread connection with a front tube locking sleeve and a rear tube locking sleeve; in addition, the front tube and the rear tube are respectively and fixedly provided with a front sleeve connection arm and a rear sleeve connection arm; the front sleeve connection arm is mutually connected with the rear sleeve connection arm by a hinge shaft; the rear end of the front tube is fixed to a locking sheet; an installation sheet is fixed to the front end near the rear tube in the locking sleeve of the rear tube; the locking sheet is provided with a long hole; the installation sheet is fixedly provided with a T-shaped locking head which can be inserted in the long hole, and the T-shaped locking head can extend along the axis direction of the rear tube. The utility model has the advantages of beautiful appearance, small size and structure, high connection strength and convenient operation.

Description

The vehicle frame pipe turnover latching device that is used for folding bicycle

The utility model relates to a kind of folding bicycle, particularly relates to a kind of folding latching device that is used for cycle frame.

The vehicle frame folding of existing folding bicycle generally is to adopt fixing linkwork, step on the linkwork of folding bicycle as the Blang of Taiwan and Britain's Joint Production, this mechanism will be tending towards parallel owing to will consider its front and back vehicle frame of folding back, so the line of centers of articulated mounting must be in the outer of vehicle frame, so just make articulated mounting form a tangible outshot, therefore can influence the outward appearance of car body, when riding, may tangle skirt angle or trousers angle, and this mechanism itself can not lock.

The purpose of this utility model provides a kind of folding catch gear that is used for folding bicycle frame.

Be used to realize a kind of vehicle frame pipe turnover latching device that is used for folding bicycle of the utility model purpose, a pipe and a back pipe before comprising one, preceding pipe can be relative folding with the back pipe, preceding pipe and back pipe are threaded with a preceding pipe lock sleeve and a back pipe lock sleeve respectively, and on preceding pipe and back pipe, fix a protheca link arm and a back cover link arm respectively, protheca link arm and back cover link arm interconnect by a jointed shaft, fix a stay in the rear end of preceding pipe, in the pipe lock sleeve of back, fix an installation sheet near the front end of back pipe, on stay, have a slotted hole, on installation sheet, fix the T shape locking head of the inserted slotted hole of back, edge tube axis direction extension, the length of locking head and width are less than the length and the width of slotted hole, but the length of locking head is greater than the width of slotted hole.

The utility model also is provided with a locating dowel pin in the pipe of back, fix a positive stop on installation sheet, and positive stop is preferably a screw that is installed on the installation sheet.

The utlity model has good looking appearance, scantling of structure is little, Joint strenght height, characteristics easy to use.

Describe the utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is the vertical cross section of latching device of the present utility model when locking state.

Fig. 2 is the section-drawing along A-A hatching line among Fig. 1.

Fig. 3 is the horizontal sectional drawing of latching device of the present utility model in the time can opening.

Fig. 4 is the vertical cross section of latching device of the present utility model when open mode.

Fig. 5 is that the utility model is used for the scheme drawing on the vehicle frame.

Referring to Fig. 1-4, a kind of vehicle frame pipe turnover latching device 20 that is used for folding bicycle of the present utility model, pipe 1 and one back pipe 2 before comprising one, preceding pipe 1 can be relative folding with back pipe 2, preceding pipe 1 and back pipe 2 are threaded with a preceding pipe lock sleeve 3 and a back pipe lock sleeve 4 respectively, and on preceding pipe 1 and back pipe 2, fix a protheca link arm 5 and a back cover link arm 6 respectively, protheca link arm 5 and back cover link arm 6 interconnect by a jointed shaft 7, fix a stay 8 in the rear end of preceding pipe 1, in the pipe lock sleeve 4 of back, fix an installation sheet 9 near the front end of back pipe 2, on stay 8, have a slotted hole 10, on installation sheet 9, fix the T shape locking head 11 of the inserted slotted hole 10 of back, edge pipe 2 axis directions extension, the length of locking head 11 and width are less than the length and the width of slotted hole 10, but the length of locking head 11 is greater than the width of slotted hole 10.

In order to carry out accurate in locating, the utility model is provided with a locating dowel pin 12 in back pipe 2, fix a positive stop 13 on installation sheet 9, and positive stop 13 is preferably a screw that is installed on the installation sheet 9.

Fig. 5 represents that vehicle frame pipe turnover latching device 20 of the present utility model is used for the situation of vehicle frame.In Fig. 5, preceding pipe 1 and back pipe 2 are used as the pipe of going up of vehicle frame, before pipe 1 be connected with vehicle frame head pipe 21, back pipe 2 is connected with vehicle frame saddle standpipe 22, down tube 23 and the back flap hinge of rear wheel frame 24 structure 25 of meeting sb. at the airport in succession can be any form, certainly, also can use vehicle frame pipe turnover latching device 20 of the present utility model.

The utility model using method is, referring to Fig. 1 and 2, when folding bicycle, to rotate 90 ° from position vertically downward to horizontal direction by the handle 26 that protheca link arm 5 and back cover link arm 6 are formed, preceding pipe lock sleeve 3 and back pipe lock sleeve 4 difference are rotated around preceding pipe 1 and back pipe 2 thereupon, back pipe lock sleeve 4 drives installation sheet 9 and rotates, and then T shape locking head 11 is rotated, reach position shown in Figure 2, at this moment, T shape locking head 11 can withdraw from from slotted hole 10, and folding articulated structure 25 has been opened or opened simultaneously.With jointed shaft 7 is that 180 ° of rotations are done at the center, i.e. pipe 1 and back pipe 2 before the foldable chassis.

When riding, handle 26 is horizontal, pipe 1 and back pipe 2 before the butt joint, and T shape locking head 11 inserts in the slotted hole 10, rotates handle 26 to the upright position, 10 one-tenth plumbnesss of T shape locking head 11 and slotted hole, preceding pipe 1 and back pipe 2 promptly are locked.

More than by a specific embodiment the utility model is described in detail, but the utility model is not limited thereto, in design scope of the present utility model, can make multiple variation, this to those skilled in the art, be conspicuous, as, the position and the movement relation of stay 8 and installation sheet 9 can be exchanged, before can being arranged on, lock sleeve in pipe or the back pipe, is used for the slotted hole that handle rotates but will on preceding pipe or back pipe, open one.

Claims

1, a kind of vehicle frame pipe turnover latching device that is used for folding bicycle, a pipe (1) and a back pipe (2) before comprising one, preceding pipe (1) can be relative folding with back pipe (2), it is characterized in that, pipe (1) and back pipe (2) are threaded with a preceding pipe lock sleeve (3) and a back pipe lock sleeve (4) respectively before said, and before said, fix a protheca link arm (5) and a back cover link arm (6) on pipe (1) and the back pipe (2) respectively, said protheca link arm (5) and back cover link arm (6) interconnect by a jointed shaft (7), fix a stay (8) in the rear end of preceding pipe (1), in back pipe lock sleeve (4), fix an installation sheet (9) near the front end of back pipe (2), on said stay (8), have a slotted hole (10), on said installation sheet (9), fix a T shape locking head (11) that inserts said slotted hole (10) along back pipe (2) axis direction extension, the length of said locking head (11) and width are less than the length and the width of said slotted hole (10), but the length of locking head (11) is greater than the width of slotted hole (10).

2, vehicle frame pipe turnover latching device according to claim 1 is characterized in that, in said back pipe (2) locating dowel pin (12) is set, and fixes a positive stop (13) on said installation sheet (9).

3, vehicle frame pipe according to claim 2 turnover latching device is characterized in that, said positive stop (13) is one to be installed in the screw on the installation sheet.