CN203345978U - Bottom chord of tower crane boom - Google Patents
Bottom chord of tower crane boom Download PDFInfo
- Publication number
- CN203345978U CN203345978U CN 201320384109 CN201320384109U CN203345978U CN 203345978 U CN203345978 U CN 203345978U CN 201320384109 CN201320384109 CN 201320384109 CN 201320384109 U CN201320384109 U CN 201320384109U CN 203345978 U CN203345978 U CN 203345978U
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- pin
- tower crane
- bottom chord
- easy
- joint
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Abstract
The utility model discloses a bottom chord of a tower crane boom. The bottom chord of the tower crane boom comprises a positive joint, a negative joint and a connecting pin which is used for fixedly connecting the positive joint and the negative joint; the bottom chord of the tower crane bottom is characterized by further comprising a cylindrical pin for axially positioning the connecting pin and a blocking pin for axially positioning the cylindrical pin, wherein the blocking pin is an R-shaped pin, and made of a corrosion-resistant temperature-resistant stainless steel spring wire 304 or 316; the cylindrical pin is a GB/T882 pin, and made from bearing steel. The bottom chord of the tower crane boom has the beneficial effects that the bottom chord of the tower crane boom is simple in structure and easy to manufacture; the connecting pin is axially positioned by the cylindrical pin, and the cylindrical pin is axially positioned by the blocking pin, so that the bottom chord is easy to manufacture, a phenomenon that a backstop thin steel plate is easy to deform or a welding seam is easy to crack and drop in an original hammering connecting pin installation process is avoided, and the reliability is higher; and the cylindrical pin is the GB/T882 pin, adopts standard components, and is easy to obtain.
Description
Technical field
The utility model relates to a kind of arm frame of tower crane, is specifically related to a kind of arm frame of tower crane lower edge, belongs to hoisting crane and manufactures field.
Background technology
The general crane arm from peaceful arm tower machine is for just putting triangular-section, and the roller of crane carriage moves on two lower edges of jib.
Existing arm frame of tower crane lower edge, as shown in Figure 1, the axial restraint mode that is fixedly connected with the connecting pin 103 of positive joint 101 and negative joint 102 is: connecting pin 103 is by welding retaining sheet steel 104 and spring cotter 105 co-located.Install in the process of hammering connecting pin 103, easily cause 104 distortion of retaining sheet steel, or cause weld cracking to come off.As can be seen here, the normal use that the axial restraint mode of existing connecting pin is the tower machine has brought potential safety hazard.
The utility model content
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of arm frame of tower crane lower edge simple, that reliability is higher of making.
In order to realize above-mentioned target, the utility model adopts following technical scheme:
A kind of arm frame of tower crane lower edge, comprise: lower boom, be separately positioned on the positive joint of lower boom end, negative joint, and the connecting pin that is fixedly connected with positive joint and negative joint, it is characterized in that, also comprise: aforementioned connecting pin is carried out to the straight pin of axial location, and the bayonet lock that aforementioned straight pin is carried out to axial location.
Aforesaid arm frame of tower crane lower edge, is characterized in that, aforementioned bayonet lock is R type pin.
Aforesaid arm frame of tower crane lower edge, is characterized in that, aforementioned R type pin adopts withstanding corrosion heatproof stainless steel spring line 304 or 316 to make.
Aforesaid arm frame of tower crane lower edge, is characterized in that, aforementioned straight pin is the GB/T882 pin.
Aforesaid arm frame of tower crane lower edge, is characterized in that, aforementioned straight pin adopts bearing steel to make.
Usefulness of the present utility model is: simple in structure, easily manufacture; Connecting pin carries out axial location by straight pin, and straight pin carries out axial location by bayonet lock again, makes simply, has avoided retaining sheet steel mutability or weld seam obscission easy to crack in original installation hammering connecting pin process, and reliability is higher; Bayonet lock is R type pin, preferably adopts withstanding corrosion heatproof stainless steel spring line 304 or 316 to make, and is suitable for using under outdoor harsh environment, can guarantee the safety of using; Straight pin is the GB/T882 pin, adopts standardized parts, easily obtains.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing arm frame of tower crane lower edge;
Fig. 2 is the structural representation of a specific embodiment of arm frame of tower crane lower edge of the present utility model.
The positive joint of the implication of Reference numeral: 101-in figure, 102-bears joint, the 103-connecting pin, 104-retaining sheet steel, the 105-spring cotter, the 201-lower boom, the positive joint of 202-, 203-bears joint, 204-connecting pin, 205-straight pin, 206-bayonet lock.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is done to concrete introduction.
With reference to Fig. 2, arm frame of tower crane lower edge of the present utility model, comprise: lower boom 201, be separately positioned on the positive joint 202 of lower boom 201 ends, negative joint 203, be fixedly connected with the connecting pin 204 of positive joint 202 and negative joint 203, connecting pin 204 is carried out to the straight pin 205 of axial location, and the bayonet lock 206 that straight pin 205 is carried out to axial location.
In the utility model, with straight pin, connecting pin is carried out to axial location, with original comparing with spring cotter co-located connecting pin with the retaining sheet steel, make simpler, and avoided retaining sheet steel mutability or weld seam obscission easy to crack in original installation hammering connecting pin process, reliability is higher.
As a kind of preferred scheme, bayonet lock 206 is R type pin.
More preferably, R type pin adopts withstanding corrosion heatproof stainless steel spring line 304 or 316 to make, and is suitable for using under outdoor harsh environment, can guarantee the safety of using.
In the utility model, straight pin 205 is preferably the GB/T882 pin, adopts standardized parts, more easily obtains.
More preferably, straight pin 205 adopts bearing steel to make, durable, can guarantee the safety of using.
It should be noted that, above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in protection domain of the present utility model.
Claims (5)
1. an arm frame of tower crane lower edge, comprise: lower boom, be separately positioned on the positive joint of lower boom end, negative joint, and the connecting pin that is fixedly connected with positive joint and negative joint, it is characterized in that, also comprise: above-mentioned connecting pin is carried out to the straight pin of axial location, and the bayonet lock that above-mentioned straight pin is carried out to axial location.
2. arm frame of tower crane lower edge according to claim 1, is characterized in that, above-mentioned bayonet lock is R type pin.
3. arm frame of tower crane lower edge according to claim 2, is characterized in that, above-mentioned R type pin adopts withstanding corrosion heatproof stainless steel spring line 304 or 316 to make.
4. arm frame of tower crane lower edge according to claim 1, is characterized in that, above-mentioned straight pin is the GB/T882 pin.
5. arm frame of tower crane lower edge according to claim 4, is characterized in that, above-mentioned straight pin adopts bearing steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320384109 CN203345978U (en) | 2013-07-01 | 2013-07-01 | Bottom chord of tower crane boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320384109 CN203345978U (en) | 2013-07-01 | 2013-07-01 | Bottom chord of tower crane boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203345978U true CN203345978U (en) | 2013-12-18 |
Family
ID=49745902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320384109 Expired - Fee Related CN203345978U (en) | 2013-07-01 | 2013-07-01 | Bottom chord of tower crane boom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203345978U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303819A (en) * | 2013-07-01 | 2013-09-18 | 张家港市天运建筑机械有限公司 | Tower crane jib bottom chord |
| CN106629425A (en) * | 2016-12-29 | 2017-05-10 | 四川建设机械（集团）股份有限公司 | Connection structure of tower type crane boom bottom chord |
-
2013
- 2013-07-01 CN CN 201320384109 patent/CN203345978U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303819A (en) * | 2013-07-01 | 2013-09-18 | 张家港市天运建筑机械有限公司 | Tower crane jib bottom chord |
| CN106629425A (en) * | 2016-12-29 | 2017-05-10 | 四川建设机械（集团）股份有限公司 | Connection structure of tower type crane boom bottom chord |
| CN106629425B (en) * | 2016-12-29 | 2019-09-03 | 四川建设机械（集团）股份有限公司 | Jib for tower crane lower edge 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: 20131218 Termination date: 20190701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |