CN218022020U

CN218022020U - Self-locking device for fixedly connecting telescopic pipe fittings

Info

Publication number: CN218022020U
Application number: CN202222364945.4U
Authority: CN
Inventors: 欧玉田
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2022-12-13
Anticipated expiration: 2032-09-06

Abstract

The utility model discloses a self-lock device of flexible pipe fitting fixed connection, including last port along the wall body axial be equipped with the sleeve pipe of constant head tank, along the outer disc wall face on the axial be equipped with notched insert tube, overlap in the beam ring of sleeve pipe upper end port excircle press from both sides, connect in the eccentric wheel locking handle that the open end was pressed from both sides to the beam ring. The groove on the insertion tube is a V-shaped groove, the inner circle wall surface of the ring clamp is provided with a V-shaped boss matched with the V-shaped groove, the V-shaped boss is connected with the inner circle wall surface of the ring clamp through a guide piece, and the guide piece is clamped in the positioning groove of the sleeve. The limiting V-shaped boss and the limiting V-shaped groove are in limiting fit, so that the V-shaped boss and the V-shaped groove are more attached to each other, and the situation that the insertion tube cannot rotate relative to the sleeve can be guaranteed. At least one deformation groove is axially formed at the end of the sleeve, so that the rigidity of the end of the sleeve can be reduced. When the collar clamp hoops the sleeve, the sleeve can hoop the insertion tube tightly so as to firmly and fixedly connect the sleeve and the insertion tube, thereby achieving the effect of safe locking.

Description

Self-locking device for fixedly connecting telescopic pipe fittings

Technical Field

The utility model relates to a removable fixed connection mechanism especially relates to a self-lock device that is used for fixed connection between the relatively flexible pipe fitting.

Background

With the development of society, people often utilize bicycles as walking tools or fitness and exercise equipment. The folding bicycle wins the favor of consumers due to the characteristic of quick folding or unfolding. When the bicycle is folded, the volume is reduced, thereby greatly facilitating transportation and storage; can be safely used after being unfolded. The middle of the bicycle handlebar is connected with an upper vertical pipe (an insert pipe) downwards, the insert pipe is inserted into a vertical pipe (a sleeve) of a front fork of the bicycle below, and the vertical height of the bicycle handlebar is adjusted by the axial sliding of the insert pipe relative to the sleeve. After the relative positions of the inserting pipe and the sleeve pipe are adjusted, the two pipe fittings are fixedly connected through a locking device, so that the inserting pipe and the sleeve pipe can not axially slide relative to each other or can not circumferentially rotate relative to each other. Fig. 1 is a schematic structural diagram of a conventional locking device for telescopic pipes. A collar clamp 4 is sleeved on the upper port of the sleeve 7, and after the insertion tube 1 is inserted into the sleeve 7, the inner diameter of the collar clamp 4 can be adjusted by rotating a locking handle 3 of an eccentric wheel arranged at the open end of the collar clamp 4, so that the sleeve 7 can clamp or release the insertion tube 1. In order to further limit the relative rotation of the insertion tube 1 and the sleeve 7, a groove 2 may be axially formed on the outer circumferential wall of the insertion tube 1, for example, a rectangular groove with straight sides is formed on both sides, and a boss 5 engaged with the groove 2 is correspondingly formed on the inner circumference of the collar clamp 4. When the device is installed, the boss 5 is clamped on the positioning groove 8 of the wall body of the sleeve 7 and is inwards embedded into the groove 2 of the insertion tube 1. After the locking handle 3 is rotated to automatically lock and fix the inserting pipe 1 and the sleeve 7, the upper vertical pipe of the handlebar and the vertical pipe of the front fork are connected into a rigid whole, so that the bicycle can be safely ridden.

Because the two side edges of the groove 2 of the insertion tube 1 and the boss 5 arranged on the inner circle of the collar clamp 4 are both straight-edge structures, namely the cross sections are rectangular, the accuracy is limited when the insertion tube 1, the collar clamp 4 and the sleeve 7 are processed; and because the rigidity of the sleeve 7 is larger, when the inner circle of the sleeve and the outer circle of the insertion tube have certain processing errors, the collar clamp 4 cannot effectively utilize the radial elastic deformation of the sleeve 7, and the insertion tube 1 is tightly hooped by the whole circumference, so that a small gap still exists after the insertion tube and the sleeve are locked. The insert tube and sleeve will generate 5 when the user rides to turn the handlebar ⁰ ～10 ⁰ The left and right relative rotation can even slide up and down. Therefore, the rigidity of the connecting device is reduced, a loose feeling is brought to people, and potential safety hazards are brought to a rider for a long time.

Therefore, how to overcome the defect that the connection and fixation reliability of the self-locking device for the fixed connection of the existing telescopic pipe fitting is not high is a problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve current flexible pipe fitting fixed connection's self-lock device and connect the not high problem of fixed reliability, provide a processing is simple, connect reliable flexible pipe fitting fixed connection's self-lock device. The self-locking device may also prevent the insertion tube from being pulled out of the cannula.

The utility model provides a pair of telescopic tube spare fixed connection's self-lock device, including last port along the wall body axial be equipped with the constant head tank the sleeve pipe, along the outer disc on the axial be equipped with notched insert tube, overlap in the collar of port excircle on the sleeve pipe press from both sides, connect in the eccentric wheel locking handle of collar clamp open end, a serial communication port, recess on the insert tube is the V-arrangement recess, the interior round wall that the collar clamp pressed from both sides be equipped with V-arrangement recess complex V-arrangement boss, this V-arrangement boss by a guide vane with the interior round wall that the collar clamp pressed from both sides be connected, this guide vane card in the sheathed tube constant head tank.

Preferably, the surfaces of the V-shaped bosses on the two sides of the guide vane are cambered surfaces and are attached to the inner circular wall surface of the ring clamp.

Preferably, the upper port of the sleeve is provided with at least one deformation groove along the axial direction of the wall body.

Preferably, the lower end part of the V-shaped groove of the insertion tube is provided with an anti-falling lug.

Preferably, the anti-falling lug is a screw.

Preferably, the wall body of the ring binding clamp is provided with a positioning screw for connecting the ring binding clamp and the sleeve.

Preferably, the collar clamp and the insertion tube are made of extruded profiles.

The utility model discloses press from both sides integrative preparation with spacing V-arrangement boss and binding ring, and V-arrangement boss constitutes spacing cooperation with the V-arrangement recess of agreeing with on the insert tube. And the two corresponding side edges of the V-shaped boss and the V-shaped groove are bevel edges, so that the V-shaped boss and the V-shaped groove are more attached to each other, and the insertion pipe can be ensured not to rotate relative to the sleeve. The surfaces of the V-shaped bosses on the left side and the right side of the guide vane are cambered surfaces, and during installation, the cambered surfaces on the back surfaces of the V-shaped bosses are tightly attached to the inner circular wall surface of the beam ring clamp 4. Particularly, at least one deformation groove is axially formed at the port of the sleeve, so that the rigidity of the port of the sleeve can be reduced. When the collar clamp hoops the sleeve, the sleeve can be effectively and elastically deformed in the radial direction, and the insertion tube is tightly hooped, so that the sleeve and the insertion tube are firmly and fixedly connected, and the effect of complete locking is achieved. When the inserting pipe is pulled out upwards, the anti-falling lug arranged at the end part of the V-shaped groove of the inserting pipe can be blocked by the lug boss on the binding ring clamp, and the inserting pipe cannot be pulled out easily even under the condition that the self-locking handle is not locked, so that the inserting pipe is safer. The collar clamp and the sleeve can be firmly connected by the positioning screw, so that the collar clamp cannot rotate. The utility model discloses the insecure defect of prior art connection has been overcome effectively. The ring binding clamp and the insertion pipe are made of extruded sections, and the whole set of locking device has few parts, so that the processing error is small, the joint surfaces can be completely matched, and the production cost is reduced.

Drawings

FIG. 1 is an exploded view of a locking device for securing a conventional telescopic tube;

FIG. 2 is an exploded view of the preferred embodiment of the present invention;

FIG. 3 is a schematic assembled cross-sectional view of the preferred embodiment of the present invention;

fig. 4 is a schematic end view of a collar clamp and an insertion tube according to a preferred embodiment of the present invention.

Detailed Description

The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:

fig. 2 to 4 show the constitution of the preferred embodiment of the present invention. The self-locking device for the fixed connection of the telescopic pipe fitting comprises a sleeve 7, a positioning groove 12 is axially arranged at the upper port of the sleeve along the wall body, an insertion pipe 1 which is inserted into the sleeve 7 and can slide relatively, a binding ring clamp 4 sleeved on the excircle of the upper port of the sleeve 7, and an eccentric locking handle 3 connected to the opening end of the binding ring clamp 4. In this embodiment, the groove axially formed on the insertion tube 1 is a V-shaped groove 11, and the inner circular wall surface of the collar clamp 4 is provided with a V-shaped boss 9 matched with the V-shaped groove 11. The cross section of the V-shaped groove 11 is approximately trapezoidal, the short side of the trapezoid is positioned at the bottom of the groove, and the long side of the trapezoid is positioned at the opening of the groove. Namely, the left and right sides of the V-shaped groove 11 are inclined planes 16. The shape of the V-shaped boss 9 on the collar clamp 4 corresponds to the shape of the V-shaped groove 11, namely, the left side and the right side of the V-shaped boss 9 are also provided with inclined planes 16. Referring to fig. 3 and 4, the V-shaped boss 9 is connected to the inner circular wall of the collar clamp 4 by a guide piece 10, and the guide piece 10 is clamped in a positioning groove 12 of the sleeve 7. In this embodiment, the surfaces of the V-shaped bosses 9 on the left and right sides of the guide vane 10 are arc surfaces 17, and when the guide vane is installed, the arc surfaces 17 on the back surfaces of the V-shaped bosses 9 are tightly attached to the inner circular wall surface of the collar clamp 4. The upper port of the sleeve 7 is provided with a deformation groove 13 along the axial direction of the wall body. Two or three deformation slots may be provided as required to further reduce the stiffness of the cannula port. A detachable anti-slip projection 14, for example, an anti-pull screw, is provided in the lower end portion of the V-shaped groove 11 of the insertion tube 1. The wall of the collar clamp 4 is provided with a set screw 15 connecting the collar clamp 4 and the collar 7 to further limit the relative movement of the collar clamp 4 and the collar 7. The insertion tube 1 and the collar clamp 4 can be made of extruded profiles.

The utility model discloses press from both sides integrative preparation with spacing V-arrangement boss and binder ring, and V-arrangement boss constitutes spacing cooperation with the V-arrangement recess of agreeing with on the insert tube. And the two corresponding side edges of the V-shaped boss and the V-shaped groove are bevel edges, so that the V-shaped boss and the V-shaped groove are more attached to each other, and the insertion pipe can be ensured not to rotate relative to the sleeve. Particularly, at least one deformation groove is axially formed at the port of the sleeve, so that the rigidity of the port of the sleeve can be reduced. When the collar clamp hoops the sleeve, the sleeve can be effectively and elastically deformed to tightly hoop the insertion tube, so that the sleeve and the insertion tube are firmly and fixedly connected, and the purpose of safe locking is achieved. The utility model discloses the insecure defect of prior art connection has been overcome effectively.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a self-lock device of telescopic tube spare fixed connection, includes that the port is equipped with the sleeve pipe of constant head tank along the wall body axial, along the outer disc axial establish the notched insert tube, overlap in the collar clamp of port excircle on the sleeve pipe, connect in the eccentric wheel locking handle of collar clamp open end, its characterized in that, the recess on the insert tube is the V-arrangement recess, the interior round wall of collar clamp be equipped with V-arrangement recess complex V-arrangement boss, this V-arrangement boss by a guide vane with the interior round wall of collar clamp be connected, this guide vane card in the sheathed tube constant head tank.

2. The self-locking device of claim 1, wherein the surfaces of the V-shaped bosses on the left and right sides of the guide tab are curved and abut against the inner circular wall surface of the collar clamp.

3. The self-locking device of claim 1, wherein the upper port of the sleeve is provided with at least one deformation groove along the axial direction of the wall body.

4. The self-locking device of claim 1, wherein the V-shaped groove of the lower end of the insertion tube is provided with a disengagement preventing projection.

5. The self-locking device of claim 4, wherein the anti-slip projection is a screw.

6. The self-locking device of claim 1, wherein the collar clip has a set screw on a wall to connect the collar clip to the collar.

7. The self-locking device of claim 1, wherein the collar clip and the insertion tube are made of extruded sections.