CN107461142A

CN107461142A - The slow descending mechanism of the automatic adaptation pipe deformation of extension ladder

Info

Publication number: CN107461142A
Application number: CN201710649558.6A
Authority: CN
Inventors: 潘跃进
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-07-27
Filing date: 2017-07-27
Publication date: 2017-12-12
Also published as: WO2019019228A1

Abstract

A kind of slow descending mechanism of the automatic adaptation pipe deformation of extension ladder, including a disk of holding one's breath being located in pipe on lower side, the disk of holding one's breath are tightly connected with place cleat stanchion tube wall, and the disk of holding one's breath is provided with exhaust hole on one in card；An isolation mount is provided with below the disk of holding one's breath, the isolation mount is arranged on the lower end of cleat stanchion pipe, and the isolation mount is provided with a lower exhaust hole；Piston ring is provided with the lower end of the isolation mount, the piston ring is tightly connected with adjacent lower section tube wall.The present invention provides a kind of slow descending mechanism of the automatic adaptation pipe deformation of the extension ladder with preferably slow drop effect.

Description

The slow descending mechanism of the automatic adaptation pipe deformation of extension ladder

Technical field

The present invention relates to extension ladder, and especially a kind of easy to assembly, structure is reliable, can adapt to automatically pipe roundness and The slow descending mechanism of the extension ladder of linearity.

Background technology

Extension ladder be it is a kind of it is extensible use, the necessity of the operation of climbing of collapsible storage, stretching in current techniques Contracting ladder, its slow descending mechanism require very high to the roundness and linearity of cleat stanchion pipe, slightly lose circle or bending, just have a strong impact on The effect of slow drop, otherwise the effect for influenceing sealing because of mistake circle causes quickly to drop with not delaying drop, otherwise just as bending And block, cause to face a difficult choice up and down, the stability of product quality when having a strong impact on batch production.I commercially once tried out one Money ladder, it is that a slow drop using rubber ring as sealing ring is stretched to be inquired according to the patent No. shown on its packing material Ladder, but practical probation effect describes that effect is very remote, and quickly, impulsive force is very big caused by decline for decrease speed, at all with patent Being not reaching to reduces the purpose of security risk.It is exactly because the pipe used is not reaching to ideal dimensions and its rubber to analyze its reason Cushion rubber can produce radial displacement during ladder decline and can not accomplish to remain the effect of sealing.

Therefore existing extension ladder technology requires very high to the shape and size precision of pipe, wants to reach preferably slow drop Effect, it is necessary to cold-drawn is carried out to pipe, aligning is processed, but largely have impact on the economy of product.

The content of the invention

In order to overcome the shortcomings of that the slow drop mode of existing extension ladder can not be poor suitable for pipe deformation, slow drop effect, The present invention provides a kind of slow descending mechanism of the automatic adaptation pipe deformation of the extension ladder with preferably slow drop effect.

The technical solution adopted for the present invention to solve the technical problems is：

A kind of slow descending mechanism of the automatic adaptation pipe deformation of extension ladder, including one be located in pipe closing on lower side Gas disk, the disk of holding one's breath are tightly connected with place cleat stanchion tube wall, and the disk of holding one's breath is small provided with being vented on one in card Hole；An isolation mount is provided with below the disk of holding one's breath, the isolation mount is arranged on the lower end of cleat stanchion pipe, the isolation Support is provided with a lower exhaust hole；Piston ring, the piston ring and adjacent lower section are provided with the lower end of the isolation mount Tube wall is tightly connected.

Further, the pipe that disk coordinates with it of holding one's breath, which uses, is interference fitted.

Further, screw column is provided with the disk center of holding one's breath, the screw column insertion is located at isolation mount center After through hole, disk will be held one's breath on isolation mount by screw.

Further, the top of the isolation mount is provided with button hole, and the isolation mount is arranged on by the button hole and is located at On the button bit of pipe on lower side.

Preferably, the middle part of the isolation mount is provided with upper seam dish, and diameter ratio of seam dish has cooperation to close with it on this Big compared with the external diameter of small tubes in two adjacent pipes of system, the internal diameter of bigger pipe is small, so as to by this adjacent two Pipe is effectively isolated；The bottom of the isolation mount is provided with lower seam dish, and the diameter of the lower seam dish is than upper seam dish Diameter is small.

Further, the upper surface of the piston ring is provided with a groove, is being radially provided with an opening, the piston ring Between the upper seam dish and lower seam dish of the isolation mount.

Beneficial effects of the present invention are mainly shown as：A slow drop extension ladder that can adapt to pipe deformation automatically is provided, When ensure that batch production on the premise of product quality stability, difficulty of processing is reduced, having saved manpower, material cost.

Brief description of the drawings

Fig. 1 is the contraction state of extension ladder and the mode of appearance figure of extended configuration, and (a) is contraction state, and (b) is stretching, extension State；

Fig. 2 is the three-dimensional explosive view of this automatic slow descending mechanism for adapting to pipe deformation；

Fig. 3 is the planar explosive figure of this automatic slow descending mechanism for adapting to pipe deformation；

Fig. 4 is the assembling view of this automatic slow descending mechanism for adapting to pipe deformation.

Embodiment

The present invention will be further described below in conjunction with the accompanying drawings.

1~Fig. 4 of reference picture, a kind of slow descending mechanism of the automatic adaptation pipe deformation of extension ladder, including one be located at pipe Disk of holding one's breath in son on lower side, the disk of holding one's breath are tightly connected with place cleat stanchion tube wall, and the disk of holding one's breath is set in card There is a upper exhaust hole；An isolation mount is provided with below the disk of holding one's breath, the isolation mount is arranged on cleat stanchion pipe Lower end, the isolation mount is provided with a lower exhaust hole；Piston ring, the work are provided with the lower end of the isolation mount Plug ring is tightly connected with adjacent lower section tube wall.

Reference picture 1 is the contraction state of extension ladder and the grown form figure of extended configuration of the present embodiment, including left and right Symmetrical two longitudinally disposed cleat stanchions 1, some steps 2 laterally set, if every cleat stanchion 1 is all descending by the Heavenly Stems and Earthly Branches Pipe 1 (1)~1 (n) is socketed to form；It is the conventional structure of extension ladder above.

Reference picture 2 and Fig. 3,1 (2) are pipe larger in adjacent two pipes, and 1 (3) are smaller in adjacent two pipes Pipe, be provided with isolation mount 2 in the lower end of the pipe 1 (3), the isolation mount 2 is by setting button hole 16 at an upper portion thereof It is buckled in and is located on the button bit 17 of pipe 1 (3) bottom, the isolation mount 2 is so as to being fixed on the lower end of pipe 1 (3).

The middle part of the isolation mount 2 is provided with upper seam dish 6, and the diameter ratio of the upper seam dish 6 has matching relationship with it Two adjacent pipes in it is bigger compared with the external diameter of small tubes 1 (3), the internal diameter of bigger pipe 1 (2) is smaller, so as to should Two adjacent pipes 1 (2) and 1 (3) are effectively isolated but can axially moved, and avoid and be axially moved phase mutual connection Touch friction；The card center of the upper seam dish 6 is provided with through hole 8；Steam vent 9 is additionally provided with the card of the upper seam dish 6.

The bottom of the isolation mount 2 is provided with lower seam dish 7, and the diameter of lower seam dish 7 is smaller than the diameter of upper seam dish 6.

Disk 3 of holding one's breath is provided with the bottom of the pipe 1 (3), the disk 3 of holding one's breath uses with pipe 1 (3) to be interference fitted, The card of the disk 3 of holding one's breath is provided with steam vent 10, and the center of the disk 3 of holding one's breath is provided with raised screw column 11, during installation, institute State after the insertion of screw column 11 is located at the through hole 8 at the center of isolation mount 2, disk will be held one's breath on the isolation mount 2 by screw 5.

Piston ring 4, the piston ring 4 are installed between upper seam dish 6 and lower seam dish 7 on the isolation mount 2 Upper surface be provided with a groove 12, just because fluted 12 presence, cause to form that a circle is flexible, energy on piston ring 4 The automatic elastic thin-wall 13 for adapting to pipe 1 (2) deformation.

The lower inside of the piston ring 4 is provided with leading surface 14, and the leading surface 14 is abutted against under the bottom of isolation mount 2 In seam dish 7, so that piston ring 4 when running into pipe 1 (2) of deformation, will not produce radial displacement, and flexible bullet Property thin-walled 13 at by pipe 1 (2) deformation when, the inwall that can also be close to pipe 1 (2) while deformation can be adapted to automatically, protect Hold sealing property.

The piston ring 4 be radially provided with one opening 15, it is described opening 15 setting be to install for convenience, only need by Opening staggers a little it become convenient substantially that between the upper seam dish 6 and lower seam dish 7 being installed on isolation mount 2, and After loading pipe 1 (2), the closure of opening 15, it is ensured that piston ring 4 is close to sealing with pipe 1 (2) inwall.

The present invention the course of work be：Reference picture 4, it is designed with the bottom of pipe 1 (2) and pipe 1 (3) a set of by isolating The slow descending mechanism for the automatic adaptation pipe deformation that support 2, disk 3 of holding one's breath, piston ring 4 and screw 5 are combined；When pipe 1 (3) During decline, because hold one's breath disk 3 (1) and piston ring 4 (2) all with the inwall of pipe 1 (2) closely gluing, sealing, so in pipe 1 (2) air held one's breath between disk 3 (1) and piston ring 4 (2) can only pass through small steam vent 9 (1), steam vent 10 (1) and exhaust Hole 9 (2), steam vent 10 (2) are slowly discharged, so as to reach the purpose slowly declined；And more importantly：This slow descending mechanism is because of knot Structure design possesses very strong automatic adaptability, and effect of preferably holding one's breath can be not only reached when using the pipe of ideal form size Fruit, when using the pipe of tolerance to a certain degree, this slow descending mechanism equally can guarantee that effect of preferably holding one's breath.

It is well known that the pipe produced of extruding actually all exist to a certain extent form tolerance (such as：Radially lose Circle and axial straight line variation), but this slow descending mechanism can adapt to the form tolerance of this degree automatically, directly can be given birth to using extrusion process The pipe that output is come, preferably slow drop effect can be reached, without additionally improving the shape of pipe by cold-drawn and straightening process Shape dimensional accuracy, so as to largely reduce difficulty of processing, manpower, material cost are saved, has improved the economy of product Property and the market competitiveness.

Claims

A kind of 1. slow descending mechanism of the automatic adaptation pipe deformation of extension ladder, it is characterised in that：It is located at including one in pipe Disk of holding one's breath on lower side, the disk of holding one's breath are tightly connected with place cleat stanchion tube wall, and the disk of holding one's breath is provided with one in card Individual upper exhaust hole；An isolation mount is provided with below the disk of holding one's breath, the isolation mount is arranged under cleat stanchion pipe End, the isolation mount are provided with a lower exhaust hole；Piston ring, the piston ring are provided with the lower end of the isolation mount It is tightly connected with adjacent lower section tube wall.
2. the slow descending mechanism of the automatic adaptation pipe deformation of extension ladder as claimed in claim 1, it is characterised in that：It is described to close Gas disk is with the pipe that it coordinates using interference fit.
3. the slow descending mechanism of the automatic adaptation pipe deformation of extension ladder as claimed in claim 1 or 2, it is characterised in that：Institute State and screw column is provided with disk center of holding one's breath, after the screw column insertion is located at the through hole at isolation mount center, will be closed by screw Gas disk is arranged on isolation mount.
4. the slow descending mechanism of the automatic adaptation pipe deformation of extension ladder as claimed in claim 1 or 2, it is characterised in that：Institute The top for stating isolation mount is provided with button hole, and the isolation mount is arranged on by the button hole and is located on the button bit of pipe on lower side.
5. the slow descending mechanism of the automatic adaptation pipe deformation of extension ladder as claimed in claim 4, it is characterised in that：It is described every Middle part from support is provided with upper seam dish, on this diameter of seam dish than have with it in two adjacent pipes of matching relationship compared with The external diameter of small tubes is big, and the internal diameter of bigger pipe is small, so as to which two adjacent pipes be effectively isolated；The isolation The bottom of support is provided with lower seam dish, and the diameter of the lower seam dish is smaller than the diameter of upper seam dish.
6. the slow descending mechanism of the automatic adaptation pipe deformation of extension ladder as claimed in claim 1 or 2, it is characterised in that：Institute The upper surface for stating piston ring is provided with a groove, is being radially provided with an opening, the piston ring is arranged on the isolation mount Upper seam dish and lower seam dish between.