CN203065055U - Suspension arm lower chord device - Google Patents
Suspension arm lower chord device Download PDFInfo
- Publication number
- CN203065055U CN203065055U CN 201220597318 CN201220597318U CN203065055U CN 203065055 U CN203065055 U CN 203065055U CN 201220597318 CN201220597318 CN 201220597318 CN 201220597318 U CN201220597318 U CN 201220597318U CN 203065055 U CN203065055 U CN 203065055U
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- CN
- China
- Prior art keywords
- arm lower
- joint
- twin adapter
- utility
- square pipe
- 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 discloses a suspension arm lower chord device. The suspension arm lower chord device comprises a single joint and a dual-joint which are respectively arranged at two ends of a square pipe and are connected with the square pipe, wherein a cushion block is welded on each of the single joint and the dual-joint; and the cushion blocks stretch into the square pipe and are respectively welded with the square pipe. The application effectively solves the problems of welding defect, welding deformation and other bad phenomena caused by the original single/dual-joint welding method, so as to guarantee the reliability of product, and greatly prolong service life.
Description
Technical field
The utility model relates to the arm lower boom device in a kind of tower crane.
Background technology
At present, mostly the lower boom list dual terminal structure of existing tower crane arm is to adopt the version of complete through hole and the method for welding fabrication, inconvenience is installed, the end short slot that the version of through hole is mainly sold directly to households utilizes the welding pasting board of twin adapter inboard and the double-deck spacing end float misalignment that restricts bearing pin of spring cotter, but the pasting board of welding is subjected to the influence of product operation easily to produce distortion, can not actv. guarantees the location of bearing pin; And problems such as welding process and post welding distortion and polishing correction thereof make reliability of products not high, and safety factor is low, influences product life.
The utility model content
The utility model is for solving above-mentioned existing problems, and the utility model provides a kind of arm lower boom device, and this device has well fixing and reliability effect.
It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking:
A kind of arm lower boom device, comprise: be located at the two ends of square tube and single joint and the twin adapter that is connected with square tube respectively, wherein, the product twin adapter docks with single joint, adopt the mode of step pin and spring cotter to be connected, wherein, the stepped hole of twin adapter keeps concordant in the step pin rear surface of packing into.
Further, preferably, the open-cellular form of described twin adapter, a side is stepped hole, opposite side is through hole.
Further, preferably, described single joint and single twin adapter forging molding.
The utility model has been taked after the technique scheme, the product that can replace complete through hole by the twin adapter with stepped hole, efficiently solve inconvenience and the low problem of connection reliability of installing, original unreliable location of welding pasting board that relies on is also replaced by the self structure advantage of step pin, the outside flush fit of step pin and stepped hole can not influence the normal operation of dolly side wheel yet, reliability of products is guaranteed, thereby makes the life-span that very big lifting arranged.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in detail, so that above-mentioned advantage of the present utility model is clearer and more definite.
Fig. 1 is the structural representation of this practical arm lower boom device;
Fig. 2 is the side schematic view of this practical arm lower boom device;
Fig. 3 is that the A of twin adapter of this practical arm lower boom device is to generalized section.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.Fig. 1 is the structural representation of the utility model arm lower boom device, and wherein, 1 twin adapter, 2 cushion blocks, 3 square tubes, 4 single joints, Fig. 2 are the side schematic views of this practical arm lower boom device.
As depicted in figs. 1 and 2, shown in arm lower boom device comprise: be located at the two ends of square tube 3 and the single joint 4 that is connected with square tube and twin adapter 1 respectively, wherein, described single joint and twin adapter also are welded with a cushion block 2 respectively, described cushion block 2 stretch in the described square tube 3 and respectively with described square tube weld together, arm links together with the step pin by single twin adapter, the step pin cooperates with the stepped hole edging, end float misalignment by spring cotter and step part restriction bearing pin, the step pin is concordant with the twin adapter outside.
And described twin adapter one side has stepped hole, and stepped hole be used for to cooperate the step pin, and wherein the cross-sectional shape of single joint and single twin adapter and wedge angle square tube is measure-alike, as shown in Figure 3, is that the A of twin adapter of this practical arm lower boom device is to generalized section.
More particularly, the step pin links together, and the step pin cooperates with the stepped hole edging, the cross-sectional shape consistent size of single twin adapter and wedge angle square tube.
The utility model has been taked after the such scheme, described twin adapter adopts has the product that stepped hole has replaced complete through hole, efficiently solve inconvenience and the low problem of connection reliability of installing, original unreliable location of welding pasting board that relies on is also replaced by the self structure advantage of step pin, the outside flush fit of step pin and stepped hole can not influence the normal operation of dolly side wheel yet, reliability of products is guaranteed, thereby makes the life-span that very big lifting arranged.
For example, the perforate of described twin adapter, former complete through hole before this, the direct selling axle that use has otch connects, employing set square and spring cotter for bearing pin are fixed, and very inconvenience is installed, and the end short slot that the version of through hole is mainly sold directly to households utilizes the welding pasting board of twin adapter inboard and the double-deck spacing end float misalignment that restricts bearing pin of spring cotter, but the pasting board of welding is subjected to the influence of product operation easily to produce distortion, can not actv. guarantees the location of bearing pin.
It should be noted that; above-mentioned specific embodiment only is exemplary; under above-mentioned instruction of the present utility model, those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in the protection domain of the present utility model.
It will be understood by those skilled in the art that top specific descriptions just in order to explain the purpose of this utility model, is not for restriction the utility model.Protection domain of the present utility model is limited by claim and equivalent thereof.
Claims (1)
1. arm lower boom device, comprise: be located at the two ends of square tube and single joint and the twin adapter that is connected with square tube respectively, it is characterized in that, described twin adapter one side has stepped hole, described single joint and twin adapter also are welded with a cushion block respectively, described cushion block stretch in the described square tube and respectively with described square tube weld together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597318 CN203065055U (en) | 2012-11-14 | 2012-11-14 | Suspension arm lower chord device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220597318 CN203065055U (en) | 2012-11-14 | 2012-11-14 | Suspension arm lower chord device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203065055U true CN203065055U (en) | 2013-07-17 |
Family
ID=48763870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220597318 Expired - Fee Related CN203065055U (en) | 2012-11-14 | 2012-11-14 | Suspension arm lower chord device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203065055U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946168A (en) * | 2017-05-08 | 2017-07-14 | 哈尔滨理工大学 | A kind of new movable arm tower crane crane arm main chord structure |
| CN107792794A (en) * | 2017-11-01 | 2018-03-13 | 浙江省建设机械集团有限公司 | Novel crane boom lower chord connection structure |
-
2012
- 2012-11-14 CN CN 201220597318 patent/CN203065055U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106946168A (en) * | 2017-05-08 | 2017-07-14 | 哈尔滨理工大学 | A kind of new movable arm tower crane crane arm main chord structure |
| CN107792794A (en) * | 2017-11-01 | 2018-03-13 | 浙江省建设机械集团有限公司 | Novel crane boom lower chord connection structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20161114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |