CN106629425B - Jib for tower crane lower edge connection structure - Google Patents
Jib for tower crane lower edge connection structure Download PDFInfo
- Publication number
- CN106629425B CN106629425B CN201611247130.0A CN201611247130A CN106629425B CN 106629425 B CN106629425 B CN 106629425B CN 201611247130 A CN201611247130 A CN 201611247130A CN 106629425 B CN106629425 B CN 106629425B
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- CN
- China
- Prior art keywords
- pin shaft
- forked standard
- pin
- lower edge
- location nut
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
Abstract
The invention discloses a kind of jib for tower crane lower edge connection structures, belong to derrick crane field, the end face of the pin shaft jib for tower crane lower edge connection structure uneven relative to the lateral surface of forked standard can be solved the problems, such as by providing one kind, plug and forked standard including being mutually inserted cooperation, it further include the pin shaft for connecting the plug and forked standard, it further include location nut, the location nut is fixedly provided on forked standard, the location nut has internal thread hole, and the internal thread hole and the pin hole on forked standard are coaxial；One section of external screw thread shaft part is provided on the pin shaft, and the external screw thread shaft part can be threadedly engaged with the internal thread hole in location nut.The present invention can realize the adjusting of depth in the pin hole being inserted on forked standard to pin shaft by screwing pin shaft, and then ensure that pin roll end face and corresponding side on crane arm lower edge are concordant, finally ensure the stable operation of trolley.
Description
Technical field
The present invention relates to derrick crane fields, and in particular to a kind of jib for tower crane lower edge connection structure.
Background technique
Currently, most of derrick crane is all the luffing movement by trolley on crane arm lower edge, realize
It accurately rises and falls to loading is hung.As shown in Fig. 8, trolley is usually the idler wheel and corresponding guide wheel difference for relying on itself
Luffing is rolled on the upper surface of crane arm lower edge and lateral surface；Therefore, the upper surface of entire crane arm lower edge and lateral surface be all
It smooth must just can guarantee that amplitude changing process is smooth and normal, the stable operation of trolley.
However, existing crane arm lower edge is typically all to be connected with each other by more piece lower edge rod piece by pin shaft, connect
Binding structure is usually to be made of plug, forked standard, pin shaft and split pin, wherein plug and forked standard respectively with corresponding lower edge rod piece
Connection end is fixedly connected, and is then again attached plug and forked standard by pin shaft.As shown in Fig. 8, in existing company
In binding structure, it is equipped with a block usually on forked standard medial surface, while using the pin shaft of bevel structure, passing through the locating latch of pin shaft
Face is contacted with block, realizes the axially position to pin shaft, then passes through split pin falling off to prevent shotpin axis again.But this company
Binding structure is difficult to the accurate positioning of pin shaft in the axial direction and to be difficult to adjust the insertion of pin shaft according to the actual situation deep
, such as there is attached drawing 9 and attached drawing 10 in degree, therefore the problem for be easy to causeing the end face of pin shaft uneven relative to the lateral surface of forked standard
Shown in situation, and then when the guide wheel of trolley runs to the link position, be easy to appear luffing Caton, hit abnormal sound,
Lead to variable-amplitude steel wire rope relaxation, jib lubbing mechanism damage；It is more likely to trolley is stuck when serious, causes dangerous thing
Therefore.
Summary of the invention
Technical problem solved by the present invention is being easy in existing jib for tower crane lower edge connection structure
The end face of the cash sale axis problem uneven relative to the lateral surface of forked standard.
The technical solution adopted by the present invention to solve the technical problems is: jib for tower crane lower edge connection structure,
Plug and forked standard including being mutually inserted cooperation, further include the pin shaft for connecting the plug and forked standard, further include positioning spiral shell
Mother, the location nut are fixedly provided on forked standard, and the location nut has internal thread hole, the internal thread hole and forked standard
On pin hole it is coaxial；One section of external screw thread shaft part is provided on the pin shaft, and the external screw thread shaft part can be with positioning spiral shell
Internal thread hole on mother is threadedly engaged.
Further, further including split pin；The stationary positioned for extending radially through location nut is provided in location nut
Slot；The movable positioning hole for extending radially through pin shaft is provided on the pin shaft；The stationary positioned slot and the movable positioning hole
It can cooperate, and can be connected the stationary positioned slot of corresponding matching with movable positioning hole by the split pin.
Further, having multiple stationary positioned slots along the arranged circumferentially spaced of location nut.
Further, having multiple movable positioning holes along the arranged circumferentially spaced of pin shaft.
Further, there are four the stationary positioned slot settings, and four stationary positioned slots are along the week of location nut
To being uniformly distributed；There are three the movable positioning hole settings, and three movable positioning holes are uniformly distributed along the circumferential direction of pin shaft.
Further, one end on the pin shaft close to external screw thread shaft part is provided with interior hexagonal counterbore.
Further, the plug is single orifice plate plug；The forked standard is spectacle plate forked standard.
The beneficial effects of the present invention are: the external screw thread shaft part on pin shaft and the internal thread hole screw thread in location nut can be passed through
Cooperation can realize the adjusting of depth in the pin hole being inserted on forked standard to pin shaft by screwing pin shaft, therefore can realize to pin
The accurate regulation and control of axial end position, and then ensure that pin roll end face and corresponding side on crane arm lower edge are concordant, it can keep away
Exempt to occur the end face of the pin shaft problem uneven relative to the lateral surface of forked standard, it is ensured that the stable operation of trolley.In addition,
Can also further by the way that corresponding stationary positioned slot and movable positioning hole is arranged after, played by split pin prevent pin shaft rotation,
The effect to fall off further ensures that the position of pin shaft is fixed.
Detailed description of the invention
Fig. 1 is the three-dimensional view of jib for tower crane lower edge connection structure of the present invention；
Fig. 2 is the main view of jib for tower crane lower edge connection structure of the present invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the cross-sectional view of Section A-A in Fig. 2；
Fig. 5 is the three-dimensional view of forked standard；
Fig. 6 is the three-dimensional view of plug；
Fig. 7 is the three-dimensional view of pin shaft；
Fig. 8 is the schematic diagram of the prior art；
Fig. 9 is that the end face of pin shaft in Fig. 8 the schematic diagram of indent problem occurs；
Figure 10 is that the end face of pin shaft in Fig. 8 the schematic diagram of outer convex problem occurs；
In the figure, it is marked as plug 1, forked standard 2, pin hole 21, pin shaft 3, external screw thread shaft part 31, interior hexagonal counterbore 32, positioning
Nut 4, internal thread hole 41, split pin 5, stationary positioned slot 6, movable positioning hole 7, idler wheel 8, guide wheel 9, crane arm lower edge 10.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
As shown in Fig. 1 to Fig. 7, jib for tower crane lower edge connection structure of the present invention, including phase interfix
The plug 1 and forked standard 2 for connecing cooperation further include the pin shaft 3 for connecting the plug 1 and forked standard 2, further include location nut 4, institute
It states location nut 4 to be fixedly provided on forked standard 2, the location nut 4 has internal thread hole 41, the internal thread hole 41 and fork
Pin hole 21 on seat 2 is coaxial；One section of external screw thread shaft part 31, and the external screw thread shaft part 31 are provided on the pin shaft 3
It can be threadedly engaged with the internal thread hole 41 in location nut 4.
It wherein, is to be threadedly engaged with the internal thread hole 41 in location nut 4 due to the external screw thread shaft part 31 on pin shaft 3, because
The depth that this pin shaft 3 is inserted into the pin hole 21 on forked standard 2 is adjustable, controllable, i.e. adjustable and ensure by screwing pin shaft 3 in this way
The end face of pin shaft 3 and corresponding side on crane arm lower edge are concordant, and then the end face that can avoid pin shaft 3 occur is relative to forked standard 2
The uneven problem of lateral surface, the stable operation of trolley is ensured with this.
In addition, being also provided with split pin 5 to further realize the rotary spacing to pin shaft 3；And in location nut
The stationary positioned slot 6 for extending radially through location nut 4 is provided on 4；The work for extending radially through pin shaft 3 is provided on the pin shaft 3
Dynamic location hole 7；The stationary positioned slot 6 and the movable positioning hole 7 can cooperate, and can be incited somebody to action by the split pin 5
The stationary positioned slot 6 and movable positioning hole 7 of corresponding matching connect.In this way, after the position of pin shaft 3 is installed in place, it can be by inserting
Enter corresponding split pin 5 and realize the locking rotated to pin shaft 3, and then can prevent pin shaft 3 from rotating and falling off.
It more specifically, can be along the circumferential direction of location nut 4 in order to realize the accurate control to the amount of movement in the axial direction of pin shaft 3
It is positioned apart from multiple stationary positioned slots 6 and/or has multiple movable positioning holes 7 along the arranged circumferentially spaced of pin shaft 3.This
The benefit of sample setting is, can be during rotating one week to pin shaft 3, it can be achieved that multiple stationary positioned slots 6 and multiple activities are fixed
Position hole 7 is corresponding in turn to cooperation, and the accurate control to 3 axial displacement of pin shaft can be improved in this way.For example, referring to institute in attached drawing
Show, is arranged there are four stationary positioned slots 6, and four stationary positioned slots 6 are uniformly distributed along the circumferential direction of location nut 4；It sets simultaneously
It sets there are three movable positioning holes 7, and three movable positioning holes 7 are uniformly distributed along the circumferential direction of pin shaft 3；At this point, theoretically working as pin
During every 15 ° of the rotation of axis 3, it is corresponding with one of movable positioning hole 7 just to have a stationary positioned slot 6；Therefore theoretical
On the precision controlling of displacement for pin shaft 3 in the axial direction the precision of 1/24 screw pitch can be realized, wherein screw pitch refers to pin
The screw pitch at place is threadedly engaged between internal thread hole 41 on external screw thread shaft part 31 on axis 3 and location nut 4.
More specifically, also interior hexagonal counterbore 32 can be provided in one end of close external screw thread shaft part 31 on the pin shaft 3.Its
The purpose of hexagonal counterbore 32 is primarily to convenient for realizing the rotation to pin shaft 3 by allen wrench of corresponding size in middle setting
It twists.Without loss of generality, it may also set up the counter bore structure of other structures.
In addition, for the specific structure of plug 1 and forked standard 2, in the present invention it is not strictly necessary that, can be used with it is existing
Plug 1 and the identical structure of forked standard 2.Specifically, can respectively refer to shown in attached drawing 5 and attached drawing 6, setting plug 1 is single orifice plate
Plug, setting forked standard 2 are spectacle plate forked standard.In addition, for the ease of by plug 1 and forked standard 2 respectively with corresponding lower edge rod piece
It is attached, the double plate prong likes connected with corresponding lower edge rod piece can be respectively arranged on plug 1 and forked standard 2.
Claims (4)
1. jib for tower crane lower edge connection structure, plug (1) and forked standard (2) including being mutually inserted cooperation, further include
For connecting the pin shaft (3) of the plug (1) and forked standard (2), it is characterised in that: further include location nut (4), the positioning spiral shell
Female (4) are fixedly provided on forked standard (2), and the location nut (4) has internal thread hole (41), the internal thread hole (41) with
Pin hole (21) on forked standard (2) is coaxial；One section of external screw thread shaft part (31) is provided on the pin shaft (3), and described outer
Threaded shaft section (31) can be threadedly engaged with the internal thread hole (41) on location nut (4)；It further include split pin (5)；In positioning spiral shell
The stationary positioned slot (6) for extending radially through location nut (4) is provided on female (4)；It is provided with and extends radially through on the pin shaft (3)
The movable positioning hole (7) of pin shaft (3)；The stationary positioned slot (6) and the movable positioning hole (7) can cooperate, and can
The stationary positioned slot (6) of corresponding matching and movable positioning hole (7) are connected by the split pin (5)；Along location nut (4)
It is arranged circumferentially spaced to have multiple stationary positioned slots (6)；Arranged circumferentially spaced along pin shaft (3) has multiple movable positioning holes
(7)。
2. jib for tower crane lower edge connection structure as described in claim 1, it is characterised in that: the stationary positioned slot
(6) there are four setting, and four stationary positioned slots (6) are uniformly distributed along the circumferential direction of location nut (4)；The movable positioning hole
(7) there are three setting, and three movable positioning holes (7) are uniformly distributed along the circumferential direction of pin shaft (3).
3. jib for tower crane lower edge connection structure as described in claim 1, it is characterised in that: in the pin shaft (3)
Upper one end close to external screw thread shaft part (31) is provided with interior hexagonal counterbore (32).
4. the jib for tower crane lower edge connection structure as described in any one of claims 1 to 3, it is characterised in that:
The plug (1) is single orifice plate plug；The forked standard (2) is spectacle plate forked standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247130.0A CN106629425B (en) | 2016-12-29 | 2016-12-29 | Jib for tower crane lower edge connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611247130.0A CN106629425B (en) | 2016-12-29 | 2016-12-29 | Jib for tower crane lower edge connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106629425A CN106629425A (en) | 2017-05-10 |
| CN106629425B true CN106629425B (en) | 2019-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611247130.0A Active CN106629425B (en) | 2016-12-29 | 2016-12-29 | Jib for tower crane lower edge connection structure |
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| Country | Link |
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| CN (1) | CN106629425B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110642163A (en) * | 2019-10-09 | 2020-01-03 | 湖南中联重科建筑起重机械有限责任公司 | Crane boom and crane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203345978U (en) * | 2013-07-01 | 2013-12-18 | 张家港市天运建筑机械有限公司 | Bottom chord of tower crane boom |
| CN203545534U (en) * | 2013-10-24 | 2014-04-16 | 朝阳凌云建筑机械有限公司 | Lower chord connecting structure of tower crane boom |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2853891B1 (en) * | 2003-04-17 | 2006-05-19 | Potain Sa | DEVICE FOR THE DISASSEMBLY OF THE ELEMENTS OF A TOWER CRANE |
| CN104791372A (en) * | 2015-03-19 | 2015-07-22 | 句容五星机械制造有限公司 | Connecting structure of dump car pyriform plate and hinge pin |
-
2016
- 2016-12-29 CN CN201611247130.0A patent/CN106629425B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203345978U (en) * | 2013-07-01 | 2013-12-18 | 张家港市天运建筑机械有限公司 | Bottom chord of tower crane boom |
| CN203545534U (en) * | 2013-10-24 | 2014-04-16 | 朝阳凌云建筑机械有限公司 | Lower chord connecting structure of tower crane boom |
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| Publication number | Publication date |
|---|---|
| CN106629425A (en) | 2017-05-10 |
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