CN208024261U - Extension ladder - Google Patents
Extension ladder Download PDFInfo
- Publication number
- CN208024261U CN208024261U CN201820153227.3U CN201820153227U CN208024261U CN 208024261 U CN208024261 U CN 208024261U CN 201820153227 U CN201820153227 U CN 201820153227U CN 208024261 U CN208024261 U CN 208024261U
- Authority
- CN
- China
- Prior art keywords
- ladder
- rod component
- vertical lead
- transmission belt
- parallelogram connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is related to a kind of extension ladders, including top connecting plate, the parallelogram connection-rod component for being each side hinged and connected one group of vertically-arranged of top connecting plate, it is respectively connected with ladder bars on the horizontal both ends axis pin of each parallelogram connection-rod component, it is provided with oppositely oriented motion thread in two adjacent ladder bars of correspondence of each group parallelogram connection-rod component, vertical lead screw is installed on motion thread, it is provided with handwheel on one of them vertical lead screw, it is both provided with driving wheel on two vertical lead screws, extension ladder further includes the transmission belt that Synchronous Transmission is connected between two driving wheels, transmission belt is the annular driving band that two ends are formed by connecting by releasable connection structure.The utility model solves the problems, such as that extension ladder in the prior art is set because that need to be placed against the wall due to use environment is limited.
Description
Technical field
The utility model is related to a kind of extension ladders.
Background technology
Ladder is the requirement in people's daily life, and Chinese patent CN105927138B discloses a kind of " extension ladder
Son ", which includes the parallelogram connection-rod component of one group of vertically-arranged, the horizontal both ends of each parallelogram connection-rod component
Axis pin all make the lengthening processing of forward direction, all sets wears cross section as rectangular ladder bars on the part of lengthening, ladder bars
Left and right ends position is symmetrically respectively machined with sliding slot penetrating before and after one section.Middle part in about one group two ladder bars on the lower
Position is machined with the opposite vertical screw hole of the hand of spiral, and vertical screw hole internal thread is connected with matching vertical lead screw, vertical silk
The intermediate position of bar is equipped with handwheel.This group of ladder bars unexpectedly other ladder bars all intermediate position be machined with vertical perforation in order to
Vertical lead screw is accommodated when ladder recycles.
In use, oppositely oriented due to two vertical screw holes, rotation handwheel can be obtained separate while ladder bars up and down
Or it is close simultaneously, and the design feature of parallelogram connection-rod component can be multiple in each connecting rod assembly by this movement synchronization
System, this telescopic variation process is also horizontally slip process of the axis pin in sliding slot, and the height of ladder entire in this way will be simultaneously
The acceleration of equimultiple elongates or shortens, to make ladder obtain elongation use state and cripetura recycling state.But it is existing at present
This extension ladder having has the following problems：1, only there are one parallelogram connection-rod components for the extension ladder, in use, necessary
Be placed against the wall and set, there is certain limitation to use environment, if there is no wall in use environment or it is other by vertical position if can not make
With；2, during being climb along ladder bars using process i.e. personnel, the position of ladder bars is not fixed, and ladder bars are in level
There is degree of freedom, this can increase the danger during cat ladder on direction；3, entire ladder needs whole carry that could move, and moves
Dynamic is not very convenient.
Utility model content
The purpose of this utility model is to provide a kind of extension ladders, to solve extension ladder in the prior art because that need to lean on
Wall is placed and the limited problem of use environment.
In order to solve the above technical problems, the technical solution of the utility model is as follows：
A kind of extension ladder, including top connecting plate, top connecting plate have each side been hinged and connected one group of vertically-arranged
Parallelogram connection-rod component, be respectively connected with ladder bars on the horizontal both ends axis pin of each parallelogram connection-rod component, it is each parallel
It is provided with oppositely oriented motion thread in two adjacent ladder bars of correspondence of quadrilateral connecting rod component, is installed on motion thread
Vertical lead screw is provided with handwheel on one of them vertical lead screw, is both provided with driving wheel on two vertical lead screws, extension ladder is also
It is connected to the transmission belt between two driving wheels including Synchronous Transmission, transmission belt is that two ends are formed by connecting by releasable connection structure
Annular driving band.
The releasable connection structure is the plug-in type releasable connection structure along the grafting of belt width direction.
The plug-in type releasable connection structure includes being set to the head end link block of transmission belt head end and being set to transmission belt
The tail end link block of tail end, head end link block connect with tail end link block complementation after width and the transmission belt bandwidth one
Cause, be provided with head end link block bolt and head end link block jack on head end link block, be provided on tail end link block for
Head end link block bolt, head end link block jack are to slotting tail end link block jack and tail end link block bolt.
The beneficial effects of the utility model are：Two parallelogram connection-rod components and top connecting plate in the utility model
Cooperation can form splayed structure, and two parallelogram connection-rod components can rely on mutual support each other, to which avoid must
The problem of wall must being relied on and limiting use environment.Actual use need adjust extension ladder height when, can first by
Two parallelogram connection-rod components arrange vertical parastate, and transmission belt is synchronous between the driving wheel of two vertical lead screws to be turned
It is dynamic, rotate the handwheel on one of them vertical lead screw, so that it may to realize the synchronization lifting of two parallelogram connection-rod components,
After the height for having adjusted extension ladder, by removing releasable connection structure, thus by transmission belt by being removed on two driving wheels, this
Two parallelogram connection-rod components of sample can form a splayed structure with angle, ladder can be used as normally to make
With.
Description of the drawings
Fig. 1 is the structural schematic diagram of extension ladder in the utility model；
Fig. 2 is status diagram of the extension ladder when adjusting height in the utility model；
Fig. 3 is the structural schematic diagram of single parallelogram connection-rod component in Fig. 1；
Fig. 4 is the cooperation schematic diagram of transmission belt and two vertical lead screws in the utility model；
Fig. 5 is the structural schematic diagram removed in Fig. 4 after transmission belt；
Fig. 6 is the structural schematic diagram of transmission belt in 4；
Fig. 7 is the status diagram after the releasable connection structural demolition of transmission belt in Fig. 6.
Specific implementation mode
A kind of implementation of extension ladder is for example shown in Fig. 1 ~ 7：Including top connecting plate 1, the left and right sides of top connecting plate
It is respectively hinged and connected the parallelogram connection-rod component of one group of vertically-arranged, the parallelogram connection-rod component that position keeps left is known as left flat
Row quadrilateral connecting rod component 2, the parallelogram connection-rod component that position is kept right are known as right parallelogram connection-rod component 3.It is each flat
Ladder bars 5 are respectively connected on the horizontal both ends axis pin of row quadrilateral connecting rod component, by parallelogram connection-rod component in the present embodiment
Horizontal both ends axis pin be referred to as the first axis pin 4 and the second axis pin 6, in order to avoid operating personnel's cat ladder process in the present embodiment
There is unstable problem in middle ladder bars, and the front end of ladder bars 5 is hinged and connected with the first axis pin 4, and ladder bars are provided on the second axis pin 6
Guide sleeve 7, the rear ends of ladder bars 5 and the guiding of ladder bars guide sleeve 7 are slidably matched, and the rear end end of ladder bars, which is additionally provided with, to be used for and ladder bars
Guide sleeve limit cooperation is to limit the gear of ladder bars orward movement limit along 8.
It is provided with oppositely oriented motion thread 11 in two adjacent ladder bars of correspondence of each group parallelogram connection-rod component,
It is installed with vertical lead screw on motion thread 11, the vertical lead screw in the present embodiment on left parallelogram connection-rod component is referred to as left
Vertical lead screw 14, the vertical lead screw on right parallelogram connection-rod component be referred to as right vertical lead screw 9, wherein being set on left vertically lead screw
Be equipped with handwheel 15, driving wheel 10 be installed on two vertical lead screws 15, the driving wheel on two vertical lead screws it is highly consistent,
Extension ladder further includes the transmission belt 16 that Synchronous Transmission is connected between two driving wheels, and transmission belt is tooth form synchronous belt, transmission
Band is the annular driving band that two ends are formed by connecting by releasable connection structure 17.Releasable connection structure is along belt width side
To the plug-in type releasable connection structure of grafting, plug-in type releasable connection structure includes being set to the head end link block of transmission belt head end
18 and be set to the tail end link block 21 of transmission belt tail end, head end link block 18 connect with 21 complementation of tail end link block after width
It is consistent with the bandwidth of transmission belt 16, head end link block bolt 20 and head end link block jack 19 are provided on head end link block 18,
Be provided on tail end link block 21 for head end link block bolt, head end link block jack to slotting tail end link block jack 23
With tail end link block bolt 22.In head end link block bolt, head end link block jack and tail end link block jack, tail end link block
After bolt is to inserting, transmission belt becomes a stable annular driving band, when head end link block bolt, head end link block jack and tail
After holding link block jack, the separation of tail end link block bolt, head end link block and the tail end link block of transmission belt disconnect, and are driven in this way
Band can be removed from two driving wheels, not influence the normal use of extension ladder.In the present embodiment, top connecting plate with it is left,
The top ladder bars of right parallelogram connection-rod component are hinged and connected.
The bottom of each parallelogram connection-rod component is respectively provided with there are two the universal wheel 12 for carrying brake gear 13, with brake
The universal wheel of vehicle device belongs to the prior art, is not described in detail to its structure at this.To avoid influencing the normal of extension ladder
Height regulating function, one of universal wheel are set in the ladder bars that lowermost position is set, another universal wheel is set to what lowermost position was set
On ladder bars guide sleeve.
Extension ladder needs adjustment height before use, as shown in Fig. 2, two groups of parallelogram connection-rod component adjustment are set
Vertical parallel orientation links together the releasable connection structure of transmission belt, and transmission belt is wound on two driving wheels, one of them
Universal wheel is locked, and operating personnel rotate handwheel, and two vertical lead screws rotate synchronously to drive two groups of parallelogram connection-rod groups
Part synchronization lifting will pin if two groups of parallelogram connection-rod component liftings are asynchronous.After height adjusts, it will pass
Dynamic band is removed, and extension ladder is put into splayed structure as shown in Figure 1, locks another universal wheel, you can as normal
Cat ladder use, when needing moving telescopic ladder, unclamp two universal wheels of each group parallelogram bottom, so that it may with convenient
Extension ladder is moved to any position.
In the other embodiments of the utility model：Releasable connection structure may not be plug-in type releasable connection structure,
Such as releasable connection structure is bolt releasable connection structure；Toothed belt can also be by other transmissions such as trapezoid belt, transmission chain bands
Band replaces.
Claims (2)
1. a kind of extension ladder, it is characterised in that：Including top connecting plate, top connecting plate has each side been hinged and connected
The parallelogram connection-rod component of one group of vertically-arranged is respectively connected with ladder on the horizontal both ends axis pin of each parallelogram connection-rod component
Bar is provided with oppositely oriented motion thread in two adjacent ladder bars of correspondence of each parallelogram connection-rod component, in transmission spiral shell
It is installed with vertical lead screw on line, handwheel is provided on one of them vertical lead screw, driving wheel is both provided on two vertical lead screws,
Extension ladder further includes the transmission belt that Synchronous Transmission is connected between two driving wheels, and transmission belt is that two ends pass through releasable connection knot
The annular driving band that structure is formed by connecting.
2. extension ladder according to claim 1, it is characterised in that：The releasable connection structure is along belt width side
To the plug-in type releasable connection structure of grafting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820153227.3U CN208024261U (en) | 2018-01-30 | 2018-01-30 | Extension ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820153227.3U CN208024261U (en) | 2018-01-30 | 2018-01-30 | Extension ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208024261U true CN208024261U (en) | 2018-10-30 |
Family
ID=63902541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820153227.3U Expired - Fee Related CN208024261U (en) | 2018-01-30 | 2018-01-30 | Extension ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208024261U (en) |
-
2018
- 2018-01-30 CN CN201820153227.3U patent/CN208024261U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181030 Termination date: 20190130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |