CN2406605Y

CN2406605Y - Vacuum dustcleaner pipe

Info

Publication number: CN2406605Y
Application number: CN00216255U
Authority: CN
Inventors: 余进兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-18
Filing date: 2000-01-18
Publication date: 2000-11-22
Anticipated expiration: 2010-01-18
Also published as: EP1118304A2; EP1118304A3

Abstract

The utility model relates to a stepless dust suction tube on a dust cleaner, which comprises an outer tube (4) and an inner tube (1) which is inserted into a tube cavity of the outer tube (4), and a position locking mechanism is arranged between the outer tube (4) and the inner tube (1). The umbrella is characterized in that the locking mechanism is a section of inner tube conical surface (5) which is arranged on the inner tube (1), and the external shape of the inner tube conical surface is conical. An open locking ring (7) is sheathed on the inner tube conical surface (5), and the inner wall of the locking ring (7) and the outer wall of the inner tube conical surface (5) are in thread connection. The inner wall of the outer tube (4) is provided with an axial guide convex rib (11) which is inserted into an axial guide slot of the locking ring (7). The utility model can cause the dust suction tube to be locked on any positions, and the operation is reliable and simple.

Description

Stepless sweep-up pipe on the dust catcher

The utility model relates to the sweep-up pipe on a kind of dust catcher.

In the prior art, sweep-up pipe on the dust catcher such as Europe patent EP0293518 disclose grade expansion sweep-up pipe that has on a kind of dust catcher, it comprises outer tube, be inserted in the interior pipe in the tube chamber of described outer tube, described outer tube and described in be provided with position locking mechanism between the pipe.When the described locking mechanism of release, described interior pipe can have level flexible with outer tube relatively, makes whole sweep-up pipe to elongate or to shorten.Described locking mechanism more complicated can only have level to regulate.

The utility model purpose provides the stepless sweep-up pipe on a kind of dust catcher that carries out step-less adjustment.

For achieving the above object, the technical solution adopted in the utility model is: the stepless sweep-up pipe on a kind of dust catcher, comprise outer tube, be inserted in the interior pipe in the tube chamber of described outer tube, be provided with position locking mechanism between described outer tube and the described interior pipe, described locking mechanism be described in pipe be provided with one section profile be conical in the pipe conical surface, be with the retaining ring that has opening on the pipe conical surface in described, the inwall of described retaining ring with described in the pipe conical surface outer wall between be threaded, the inwall of described outer tube is provided with axial guiding convex tendon, and described guiding convex tendon is inserted in the axially directed groove of described retaining ring.When interior pipe and outer tube relatively rotate, outer tube does not produce moving mutually moving with described retaining ring, pipe relatively rotates with described retaining ring only, makes described retaining ring manage conical surface upper edge threads turn in described, and then retaining ring can move axially along the described interior pipe conical surface.When the thick direction of inwardly managing the conical surface when described retaining ring moves, described retaining ring by tensioner between interior pipe and outer tube, locked between pipe and the outer tube in described.When described retaining ring is inwardly managed the thin direction of the conical surface when moving, between interior pipe and the outer tube in the gapped permission the relative slip of pipe with outer tube to elongate or shorten.

Because the utilization of such scheme, the utility model compared with prior art has following advantage:

Retaining mechanism of the present utility model only relies on a retaining ring, and is therefore simple in structure, and sweep-up pipe is locked on any position, and its operation is reliable, simple.

The utility model will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a structural front view of the present utility model;

Accompanying drawing 2 is the A-A direction sectional view of accompanying drawing 1;

Wherein: [1], interior pipe; [2], pipe bushing; [3], clip; [4], outer tube; [5], the interior pipe conical surface; [6], screw thread; [7], retaining ring; [8], back-up ring; [9], tail cover; [10], retaining ring opening; [11], guiding convex tendon;

Embodiment: shown in accompanying drawing 1, stepless sweep-up pipe on a kind of dust catcher, comprise outer tube [4], be inserted in the interior pipe [1] in the tube chamber of described outer tube [4], be provided with position locking mechanism between described outer tube [4] and the described interior pipe [1], described locking mechanism be described in the pipe [1] be provided with one section profile be conical in the pipe conical surface [5], be with the retaining ring [7] that has opening on the pipe conical surface [5] in described, the retaining ring opening [10] that opening on the described retaining ring [7] axially has for the tubular axis along described interior pipe [1], described retaining ring opening [10] be used to make described retaining ring [7] be inserted in described in during the thick place of the pipe conical surface [5], described retaining ring [7] can be opened.

The inwall of described retaining ring [7] with described in the pipe conical surface [5] outer wall between be threaded.The inwall of described outer tube [4] is provided with axial guiding convex tendon [11], described guiding convex tendon [11] is inserted in the axially directed groove of described retaining ring [7], make described retaining ring [7] to endwisely slip with respect to the inwall of described outer tube [4], still described retaining ring [7] can not be rotated with respect to the inwall of described outer tube [4].The structure that a kind of equivalence is replaced is that described retaining ring [7] also can have a convex tendon to be inserted in the axially directed groove on described outer tube [4] inwall.

The pipe conical surface [5] is arranged at the afterbody of described interior pipe [1] in described.The rear portion of described retaining ring [7] is provided with the back-up ring [8] that is fixed on the described interior pipe conical surface [5].Described back-up ring [8] has a position-limiting action to described retaining ring [7].

Claims

1, stepless sweep-up pipe on a kind of dust catcher, comprise outer tube [4], be inserted in the interior pipe [1] in the tube chamber of described outer tube [4], be provided with position locking mechanism between described outer tube [4] and the described interior pipe [1], it is characterized in that: described locking mechanism be described in the pipe [1] be provided with one section profile be conical in the pipe conical surface [5], be with the retaining ring [7] that has opening on the pipe conical surface [5] in described, the inwall of described retaining ring [7] with described in the pipe conical surface [5] outer wall between be threaded, the inwall of described outer tube [4] is provided with axial guiding convex tendon [11], and described guiding convex tendon [11] is inserted in the axially directed groove of described retaining ring [7].

2, the stepless sweep-up pipe on the dust catcher according to claim 1 is characterized in that: the retaining ring opening [10] that the opening on the described retaining ring [7] axially has for the tubular axis along described interior pipe [1].

3, the stepless sweep-up pipe on the dust catcher according to claim 1 is characterized in that: the pipe conical surface [5] is arranged at the afterbody of described interior pipe [1] in described.

4, the stepless sweep-up pipe on the dust catcher according to claim 3 is characterized in that: the rear portion of described retaining ring [7] is provided with the back-up ring [8] that is fixed on the described interior pipe conical surface [5].