CN103232002B - Boom anti-tripping mechanism as well as crane boom and construction crane comprising boom anti-tripping mechanism - Google Patents
Boom anti-tripping mechanism as well as crane boom and construction crane comprising boom anti-tripping mechanism Download PDFInfo
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- CN103232002B CN103232002B CN201310166850.4A CN201310166850A CN103232002B CN 103232002 B CN103232002 B CN 103232002B CN 201310166850 A CN201310166850 A CN 201310166850A CN 103232002 B CN103232002 B CN 103232002B
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Abstract
The invention provides a boom anti-tripping mechanism as well as a crane boom and a construction crane comprising the boom anti-tripping mechanism. The boom anti-tripping mechanism comprises a first connecting part (10), a second connecting part (20) and a locking part (50), wherein the first connecting part (10) is arranged at the first end of an arm body part (30) of a boom, the second connecting part (20) arranged at the first end of an arm tip part (40) of the boom which is connected with the arm body part (30), the locking part (50) is movably installed between the first connecting part (10) and the second connecting part (20), and provided with a first position for preventing the first connecting part (10) and the second connecting part (20) from doing the relative movement along a first direction and a second position which can enable the first connecting part (10) and the second connecting part (20) to do the relative movement along the first direction, and the first direction is perpendicular to the moving direction of the locking part (50). According to the boom anti-tripping mechanism provided by the invention, the boom can be effectively prevented from tripping.
Description
Technical field
The present invention relates to elevator machinery field, in particular to a kind of jib inclination-proof device and the elevator boom rack, the crane that comprise it.
Background technology
In crane field, existing hoisting crane generally comprises arm body portion and arm tip, arm body portion is connected by superposed bearing pin rotationally with between arm tip, rise in arm process carrying out arm body, arm body portion starts to raise up, arm tip is rotated around bearing pin under gravity, and bottom is drawn close to arm body portion.When arm body portion raises up certain angle, the connecting bridge between arm tip with arm body portion engages completely, arm tip can under the drive in arm body portion hoisting heavy.Due to the Action of Gravity Field of weight and the deadweight of arm tip, the connection of the bearing pin of arm tip only between top portion and arm body portion just can complete lifting action.
But rising in arm or the process of lifting, when arm body portion raises up the comparatively large or arm tip of angle after carrying out lift heavy unloading, can rebound in arm tip, and then drive jib to tumble, and causes safety misadventure.
Summary of the invention
The present invention aims to provide a kind of jib inclination-proof device and comprises its elevator boom rack, crane, can effectively prevent jib from tumbling.
To achieve these goals, according to an aspect of the present invention, provide a kind of jib inclination-proof device, comprising: the first connecting portion, be arranged on the first end in the arm body portion of jib; Second connecting portion, is arranged on the first end be connected with arm body portion of the arm tip of jib; Locking piece, is arranged between the first connecting portion and the second connecting portion movably; Locking piece has and prevents the first connecting portion and the second connecting portion along the primary importance of first direction generation relative motion and make the first connecting portion and the second connecting portion along the second place of first direction generation relative motion, and this first direction is perpendicular to the moving direction of locking piece.
Further, the first connecting portion has the first slideway; Second connecting portion has the second slideway, and the first slideway and the second slideway can be arranged with being connected; Locking piece is mounted slidably along the first slideway and the second slideway, and locking piece has the primary importance at the cohesive position place being connected to the first slideway and the second slideway, and away from the second place of cohesive position.
Further, first connecting portion is be fixedly connected on the first sleeve in arm body portion, second connecting portion is the second sleeve be fixedly connected on arm tip, and the opening of the first sleeve and the second sleeve is oppositely arranged, and locking piece is the slidiing pin be mounted slidably in the first sleeve and the second sleeve.
Further, slidiing pin is free to slide to the second sleeve when jib is positioned at assembled state, is free to slide to the cohesive position of the first sleeve and the second sleeve when jib has been positioned at arm state.
Further, slidiing pin and be free-running fit between the first sleeve and the second sleeve, the two ends of slidiing pin are provided with guiding frustum.
Further, the first sleeve and/or the second sleeve internal fixtion are provided with the locating part of the movement position limiting slidiing pin.
Further, jib inclination-proof device also comprises the testing agency of the movement position detecting locking piece.
Further, testing agency comprises the position transduser be arranged on the first connecting portion and/or the second connecting portion.
Further, testing agency also comprises the angular transducer be arranged in arm body portion.
According to a further aspect in the invention, provide a kind of elevator boom rack, the arm tip comprising arm body portion and be connected rotationally by top bearing pin with arm body portion, also comprise jib inclination-proof device, this jib inclination-proof device is above-mentioned jib inclination-proof device, first connecting portion of jib inclination-proof device is fixedly connected in arm body portion, and the second connecting portion of jib inclination-proof device is fixedly connected on arm tip.
Further, the first connecting portion is fixedly connected on the side away from top bearing pin in arm body portion, and the second connecting portion is fixedly connected on the side away from top bearing pin of arm tip.
In accordance with a further aspect of the present invention, provide a kind of crane, comprise elevator boom rack, this elevator boom rack is above-mentioned elevator boom rack.
Apply technical scheme of the present invention, locking piece is arranged between the first connecting portion and the second connecting portion movably; Locking piece has and prevents the first connecting portion and the second connecting portion along the primary importance of first direction generation relative motion and make the first connecting portion and the second connecting portion along the second place of first direction generation relative motion, and this first direction is perpendicular to the moving direction of locking piece.In hoisting crane working process, locking piece can adjust annexation between the first connecting portion and the second connecting portion according to the state of hoisting crane, when crane is in installing condition or other off working state, locking piece can be adjusted to the second place, prevent locking piece from causing obstruction to the first connecting portion and the relative motion in a first direction of the second connecting portion, first connecting portion and the second connecting portion can be departed from, thus make between the arm body portion of crane and arm tip, to be more convenient to dismounting, and obstruction can not be caused to the mounting or dismounting of arm body portion and arm tip.When crane has been in arm state, then locking piece can be adjusted to primary importance, first connecting portion and the second connecting portion are linked together, now locking piece is positioned in the middle of the first connecting portion and the second connecting portion, and can prevent between the first connecting portion and the second connecting portion along first direction generation relative motion, therefore the first connecting portion and the second connecting portion can be made to be locked together, pass through locking piece, the cooperation of the first connecting portion and the second connecting portion, can make, between the arm body portion of jib and arm tip, there is more stable connection structure, therefore can effectively prevent in jib course of action, tumble due to reasons such as Condition of Sudden Unloadings in arm tip, the arm body portion avoided and then may cause tumbles, effectively ensure that the safe operation of crane.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows structural representation when elevator boom rack of the prior art is in assembled state;
Fig. 2 shows structural representation when elevator boom rack of the prior art has been in arm state;
Fig. 3 shows structural representation when elevator boom rack has according to an embodiment of the invention been in arm state;
Fig. 4 show jib inclination-proof device according to an embodiment of the invention be in assembled state time sectional structure schematic diagram;
Fig. 5 show jib inclination-proof device according to an embodiment of the invention be in horizontality time sectional structure schematic diagram; And
Fig. 6 show jib inclination-proof device according to an embodiment of the invention be in arm state time sectional structure schematic diagram.
Detailed description of the invention
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Fig. 1 and Fig. 2 is respectively structural representation when elevator boom rack of the prior art is in assembled state and plays arm state.As can be seen from Figure 1, when elevator boom rack is in assembled state, connected rotationally by the bearing pin being arranged on top between the first end in the arm body portion 30 of elevator boom rack and the first end of arm tip 40, jib is supported by the supporting construction bottom arm body portion 30 and arm tip 40, has comparatively wide arc gap between arm body portion 30 and the bottom of arm tip 40.
As can be seen from Figure 2, when elevator boom rack is started working, elevator boom rack has been in arm state, now arm body portion 30 starts to raise up under the effect of lifting lifting rope, the first end be connected with arm body portion 30 upward movement under the drive in arm body portion 30 of arm tip 40, second end in the away from arm body portion 30 of arm tip 40 supports on the ground.When arm body portion 30 raises up certain angle, the chord member of the downside of the first end of arm tip 40 can contact with structures such as the cross bars on the downside of the first end in arm body portion 30, and arm tip 40 is pressed in arm body portion 30 under gravity.In the process of lifting, the application force of weight can act on arm tip 40, and arm tip 40 is pressed in arm body portion 30 more closely.
If but there is Condition of Sudden Unloading or other unexpected situation and cause hanging loading when departing from, arm tip 40, under reaction force, can rotate around top bearing pin, if application force is larger, then may tumble, and then drive whole jib to tumble, serious may cause the accident.
Arm tip 40 is caused to tumble brought problem in order to prevent the reaction force be subject to due to arm tip 40, the application is provided with connecting portion in arm body portion 30 and arm tip 40, and by locking piece 50, two connecting portions are locked, thus can not tumble when being subject to affecting of Condition of Sudden Unloading in arm tip 40.When not needing to lock two connecting portions, then can change the position of locking piece 50 easily, removing the locking state between two connecting portions, thus make the dismounting between arm tip 40 and arm body portion 30 and fast easier for installation.
As shown in Figure 3 and Figure 6, according to embodiments of the invention, jib inclination-proof device comprises the first connecting portion 10, second connecting portion 20 and locking piece 50, first connecting portion 10 is arranged on the first end in the arm body portion 30 of jib, second connecting portion 20 is arranged on the first end of the arm tip 40 of jib, locking piece 50 is arranged between the first connecting portion 10 and the second connecting portion 20 movably, and locking piece 50 has and prevents the first connecting portion 10 and the second connecting portion 20 along the primary importance of first direction generation relative motion and make the first connecting portion 10 and the second connecting portion 20 along the second place of first direction generation relative motion, this first direction is perpendicular to the moving direction of locking piece 50.When being long rod structure when locking piece 50 and moving along the length direction of long rod structure, this first direction is perpendicular to the length direction of long rod structure.When locking piece 50 is round bar, this first direction is the radial direction of round bar.
By above-mentioned set-up mode, annexation between the first connecting portion 10 and the second connecting portion 20 can be adjusted according to the state of crane, when crane is in installing condition or other off working state, locking piece 50 can be adjusted to the second place, prevent locking piece from causing obstruction to the first connecting portion 10 and the second connecting portion 20 relative motion in a first direction, first connecting portion 10 and the second connecting portion 20 can be departed from, thus make between the arm body portion 30 of crane and arm tip 40, to be more convenient to dismounting, and obstruction can not be caused to the mounting or dismounting of arm body portion 30 and arm tip 40.When crane has been in arm state, then locking piece 50 can be adjusted to primary importance, first connecting portion 10 and the second connecting portion 20 are linked together, now locking piece 50 is positioned in the middle of the first connecting portion 10 and the second connecting portion 20, and can prevent between the first connecting portion 10 and the second connecting portion 20 along first direction generation relative motion, therefore the first connecting portion 10 and the second connecting portion 20 can be made to be locked together, by locking piece 50, the cooperation of the first connecting portion 10 and the second connecting portion 20, can make, between the arm body portion 30 of jib and arm tip 40, there is more stable connection structure, therefore can effectively prevent in jib course of action, tumble due to reasons such as Condition of Sudden Unloadings in arm tip 40, and then cause arm body portion 30 to tumble, effectively ensure that the safe operation of crane.
In the present embodiment, first connecting portion 10 has the first slideway 11, second connecting portion 20 has the second slideway 21, first slideway 11 and the second slideway 21 are arranged accordingly, make when playing arm state, when arm body portion 30 compresses mutually with the bottom of arm tip 40, the first slideway 11 and the second slideway 21 are connected, first slideway 11 is consistent with the bearing of trend of the second slideway 21, ensures that locking piece 50 can slide in the first slideway 11 and the second slideway 21.First slideway 11 can be identical with the cross sectional shape of the second slideway 21, also can be different, but should ensure that locking piece 50 all slidably and is not hindered in the first slideway 11 and the second slideway 21.Preferably, the first slideway 11 is all identical with cross sectional shape with the size of the second slideway 21.
Locking piece 50 is mounted slidably in the first slideway 11 and the second slideway 21, and locking piece 50 has the primary importance at the cohesive position place being connected to the first slideway 11 and the second slideway 21, and away from the second place of this cohesive position.When locking piece 50 is connected to the cohesive position of the first slideway 11 and the second slideway 21, a part for locking piece 50 is positioned at the first slideway 11, another part is positioned at the second slideway 21, thus make locking piece 50 be stuck between the first slideway 11 and the second slideway 21, first connecting portion 10 and the second connecting portion 20 are linked together, match with the top bearing pin between arm body portion 30 and arm tip 40, prevent from departing from along first direction generation relative motion between the first connecting portion 10 and the second connecting portion 20, form the locking position limiting structure preventing jib from tumbling.When locking piece 50 is positioned at the cohesive position of the first slideway 11 and the second slideway 21, its length should be able to ensure to prevent the first connecting portion 10 and the second connecting portion 20 from departing from.
When locking piece 50 is positioned at the second place, locking piece 50 can be positioned at the first slideway 11 on the first connecting portion 10 completely, and also can be positioned at the second slideway 21 on the second connecting portion 20 completely, its particular location can be determined according to the regulative mode of locking piece 50.That is, if locking piece 50 realizes change in location by driver train, then locking piece 50 both can be positioned at the first slideway 11, also can be positioned at the second slideway 21.When locking piece 50 be according to jib raise up angle difference and carried out the adjustment of position by the gravity of self, then when locking piece 50 is in the second place, it is positioned at the second slideway 21 completely.
In conjunction with shown in Figure 6, in the present embodiment, first connecting portion 10 is the first sleeve, second connecting portion 20 is the second sleeve, first sleeve is fixedly connected in arm body portion 30, and the second sleeve is fixedly connected on arm tip 40, and the opening of the first sleeve and the second sleeve is oppositely arranged, locking piece 50 is the slidiing pin be mounted slidably in the first sleeve and the second sleeve, and above-mentioned first direction is the radial direction of slidiing pin.Preferably, the first sleeve is identical with the internal diameter of the second sleeve, and when jib is in lifting state (when the bottom of arm body portion 30 and arm tip 40 abuts against), the first sleeve and the second sleeve are coaxially arranged.First sleeve and the second sleeve also can be other structure, such as square cartridge structure or other polygon tubular structure.Preferably, reinforced rib is provided with at the first sleeve and the connection location place in arm body portion 30 and the connection location place of the second sleeve and arm tip 40.
This slidiing pin passes through the second slideway 21 automatically sliding into the second sleeve from gravity when jib is positioned at assembled state, in such cases, slidiing pin is positioned at the second sleeve completely, first sleeve and the second sleeve depart from, no matter be install or dismantle arm body portion 30 and arm tip 40, all do not need to operate the first sleeve and the second sleeve, therefore the mounting or dismounting of jib are very convenient.Namely slidiing pin is when jib is positioned at assembled state, and the height of the first sleeve is higher than the height of the second sleeve, and the first sleeve and the second sleeve are all arranged relative to terrain slope.
When jib has been positioned at arm state, arm body portion 30 raises up after certain angle, the friction force taken between itself and the second slideway 21 is made every effort to overcome in the deadweight of slidiing pin, start the cohesive position sliding into the second slideway 21 and the first slideway 11 from the second slideway 21, simultaneously, the bottom of arm tip 40 is drawn close to the bottom in arm body portion 30, and is finally pressed in the lower crosspiece in arm body portion 30.In the process, slidiing pin slides into the cohesive position of the first slideway 11 and the second slideway 21 gradually from the second slideway 21, and the relative position of final locking the first sleeve and the second sleeve, and then the connection structure between lock arm body portion 30 and arm tip 40.Due to the slidiing pin in the present embodiment rely on completely self from gravity to realize the change in location of bearing pin, therefore automatic insert-pull pin can be realized, avoid the issuable dangerous situation of operative, effectively reduce labour intensity, improve the degree of automation of complete machine, simple, be convenient to Self-loading-unloading, especially for aloft work, the safety and reliability of crane arm support operation can more be improved.
In order to ensure the smooth degree that slidiing pin moves, slidiing pin and be free-running fit between the first sleeve and the second sleeve, its tolerance clearance can be bigger, but premised on the connection structure not affecting arm body portion 30 and arm tip 40 when playing arm state.Guiding frustum can also be set at the two ends of slidiing pin, directional tagging can be played to slidiing pin, prevent the motion of gap to slidiing pin at the connection location place of the first sleeve and the second sleeve from causing adverse effect.
In order to ensure the movement position of slidiing pin, in the first sleeve and the second sleeve, all can be fixedly installed the locating part 12 of the movement position limiting slidiing pin.The setting position of the locating part 12 in the first sleeve should ensure that locking piece 50 is when the cohesive position of the first sleeve and the second sleeve, and the middle part of locking piece 50 is just in time positioned at the linking gap location of the first sleeve and the second sleeve.The setting position of the locating part 12 in the second sleeve should ensure that locking piece 50 can be positioned at the second sleeve completely, can not affect the first sleeve and the assembly and disassembly operations of the second sleeve when jib is in installation or disassembly status.
Locating part 12 also can only be arranged in the first sleeve or the second sleeve, or does not arrange locating part 12, and the length by means of only restriction first sleeve and the second sleeve ensures the movement position of locking piece 50.Locating part 12 can be baffle plate, projection or other any structure that can play position-limiting action to the motion of slidiing pin.
Preferably, jib inclination-proof device also comprises the testing agency of the movement position detecting locking piece 50, and this testing agency, for detecting the position of locking piece 50 when jib is in different conditions, ensures that jib inclination-proof device normally works.Testing agency comprises the position transduser 71 be arranged on the first sleeve and/or the second sleeve.Position transduser 71 can be arranged on locating part 12, also can be arranged on the outer wall of sleeve, can detect slidiing pin and whether reach desired location.Wherein being positioned at position transduser 71 on the first sleeve for detecting the state that completes of slidiing pin, being positioned at position transduser 71 on the second sleeve for detecting the disengaging state of slidiing pin.Jib inclination-proof device can also comprise controller, and this controller is connected with testing agency, when testing agency detects abnormal operating state, gives the alarm, and avoids the generation of safety misadventure.
Testing agency can also comprise the angular transducer 72 be arranged in arm body portion 30, and this angular transducer 72 is for the angle that raises up in detection arm body portion 30.The signal that controller transmits according to position transduser 71 and angular transducer 72, judges whether jib inclination-proof device normally completes insert-pull pin action, and correspondingly sends control signal.
In a unshowned embodiment, jib inclination-proof device can also comprise driver train, and this driver train, according to the movement position of the Angle ambiguity slidiing pin in the arm body portion 30 of jib, ensures the various functions of slidiing pin.In such cases, due to jib inclination-proof device be not rely on slidiing pin from gravity to carry out the adjustment of position, therefore, can when jib be in installation or disassembly status, slidiing pin is made to be positioned at the first sleeve or the second sleeve completely under the driving effect of driver train, when jib has been in arm state, slidiing pin has been made to be positioned at the cohesive position of the first sleeve and the second sleeve.Here driver train is such as electric push rod or drives oil cylinder etc.Driver train is connected with controller, is controlled the motion of driver train by controller, ensures that slidiing pin arrives predetermined work position.
In conjunction with shown in Figure 4, when jib is positioned at assembled state, under the effect of slidiing pin self gravitation, slidiing pin is positioned at the second sleeve completely, there is not annexation between the first sleeve and the second sleeve.
In conjunction with shown in Figure 5, when the arm body portion 30 of jib starts to raise up, the angle between the axis of the first sleeve and the second sleeve and ground starts to change, and when the axis of the first sleeve and the second sleeve parallels with ground, slidiing pin remains in the second sleeve.
In conjunction with shown in Figure 6, when the arm body portion 30 of jib raises up certain angle, slidiing pin overcomes itself and the friction force between the second sleeve and the first sleeve, start to slide in the first sleeve gradually, and to raise up the increase of angle along with arm body portion 30, finally slide into the position at locating part 12 place, complete the connection of the first sleeve and the second sleeve.In such cases, owing to there are top bearing pin and locking piece 50 two connection locations between arm body portion 30 and arm tip 40, therefore form a fixed connection, arm tip 40 is when being subject to the application force of Condition of Sudden Unloading, by this force transmission to arm body portion 30, and can move with arm body portion 30, therefore, can not overthrow accident be there is, the safe action of jib can be ensured.
In conjunction with shown in Figure 3, according to embodiments of the invention, the arm tip 40 that elevator boom rack is comprised arm body portion 30 and is connected rotationally by top bearing pin with arm body portion 30, also comprise jib inclination-proof device, this jib inclination-proof device is above-mentioned jib inclination-proof device, first connecting portion 10 of jib inclination-proof device is fixedly connected in arm body portion 30, and the second connecting portion 20 of jib inclination-proof device is fixedly connected on arm tip 40.Preferably, the first connecting portion 10 is fixedly connected on the side away from top bearing pin in arm body portion 30, and the second connecting portion 20 is fixedly connected on the side away from top bearing pin of arm tip 40.
According to embodiments of the invention, crane comprises elevator boom rack, and this elevator boom rack is above-mentioned elevator boom rack.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect: locking piece is arranged between the first connecting portion and the second connecting portion movably; Locking piece has and prevents the first connecting portion and the second connecting portion along the primary importance of first direction generation relative motion and make the first connecting portion and the second connecting portion along the second place of first direction generation relative motion, and this first direction is perpendicular to the moving direction of locking piece.In hoisting crane working process, locking piece can adjust annexation between the first connecting portion and the second connecting portion according to the state of hoisting crane, when crane is in installing condition or other off working state, locking piece can be adjusted to the second place, prevent locking piece from causing obstruction to the first connecting portion and the relative motion in a first direction of the second connecting portion, first connecting portion and the second connecting portion can be departed from, thus make between the arm body portion of crane and arm tip, to be more convenient to dismounting, and obstruction can not be caused to the mounting or dismounting of arm body portion and arm tip.When crane has been in arm state, then locking piece can be adjusted to primary importance, first connecting portion and the second connecting portion are linked together, now locking piece is positioned in the middle of the first connecting portion and the second connecting portion, and can prevent between the first connecting portion and the second connecting portion along first direction generation relative motion, therefore the first connecting portion and the second connecting portion can be made to be locked together, pass through locking piece, the cooperation of the first connecting portion and the second connecting portion, can make, between the arm body portion of jib and arm tip, there is more stable connection structure, therefore can effectively prevent in jib course of action, tumble due to reasons such as Condition of Sudden Unloadings in arm tip, the arm body portion avoided and then may cause tumbles, effectively ensure that the safe operation of crane.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. a jib inclination-proof device, is characterized in that, comprising:
First connecting portion (10), is arranged on the first end in the arm body portion (30) of jib;
Second connecting portion (20), is arranged on the first end be connected with described arm body portion (30) of the arm tip (40) of described jib;
Locking piece (50), is arranged between described first connecting portion (10) and the second connecting portion (20) movably;
Described locking piece (50) has the primary importance preventing described first connecting portion (10) and described second connecting portion (20) along first direction generation relative motion, described locking piece (50) also has the second place making described first connecting portion (10) and described second connecting portion (20) along first direction generation relative motion, and this first direction is perpendicular to the moving direction of described locking piece (50).
2. jib inclination-proof device according to claim 1, is characterized in that,
Described first connecting portion (10) has the first slideway (11);
Described second connecting portion (20) has the second slideway (21), and described first slideway (11) and described second slideway (21) can be arranged with being connected;
Described locking piece (50) is mounted slidably along described first slideway (11) and described second slideway (21), and described locking piece (50) has the described primary importance at the cohesive position place being connected to described first slideway (11) and described second slideway (21), and away from the described second place of described cohesive position.
3. jib inclination-proof device according to claim 2, it is characterized in that, described first connecting portion (10) is for being fixedly connected on the first sleeve on described arm body portion (30), described second connecting portion (20) is for being fixedly connected on the second sleeve on described arm tip (40), the opening of described first sleeve and described second sleeve is oppositely arranged, and described locking piece (50) is the slidiing pin be mounted slidably in described first sleeve and described second sleeve.
4. jib inclination-proof device according to claim 3, it is characterized in that, described slidiing pin is free to slide to described second sleeve when described jib is positioned at assembled state, be free to slide to the cohesive position of described first sleeve and described second sleeve when described jib has been positioned at arm state.
5. jib inclination-proof device according to claim 3, is characterized in that, described slidiing pin and be free-running fit between described first sleeve and described second sleeve, and the two ends of described slidiing pin are provided with guiding frustum.
6. jib inclination-proof device according to claim 3, is characterized in that, described first sleeve and/or described second sleeve internal fixtion are provided with the locating part (12) of the movement position limiting described slidiing pin.
7. jib inclination-proof device according to any one of claim 1 to 6, is characterized in that, described jib inclination-proof device also comprises the testing agency of the movement position detecting described locking piece (50).
8. jib inclination-proof device according to claim 7, is characterized in that, described testing agency comprises the position transduser (71) be arranged on described first connecting portion (10) and/or described second connecting portion (20).
9. jib inclination-proof device according to claim 8, is characterized in that, described testing agency also comprises the angular transducer (72) be arranged on described arm body portion (30).
10. an elevator boom rack, the arm tip (40) comprising arm body portion (30) and be connected rotationally by top bearing pin with described arm body portion (30), it is characterized in that, also comprise jib inclination-proof device, the jib inclination-proof device of described jib inclination-proof device according to any one of claim 1 to 9, first connecting portion (10) of described jib inclination-proof device is fixedly connected on described arm body portion (30), and second connecting portion (20) of described jib inclination-proof device is fixedly connected on described arm tip (40).
11. elevator boom racks according to claim 10, it is characterized in that, described first connecting portion (10) is fixedly connected on the side away from described top bearing pin of described arm body portion (30), and described second connecting portion (20) is fixedly connected on the side away from described top bearing pin of described arm tip (40).
12. 1 kinds of cranes, comprise elevator boom rack, it is characterized in that, described elevator boom rack is the elevator boom rack described in claim 10 or 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310166850.4A CN103232002B (en) | 2013-05-08 | 2013-05-08 | Boom anti-tripping mechanism as well as crane boom and construction crane comprising boom anti-tripping mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310166850.4A CN103232002B (en) | 2013-05-08 | 2013-05-08 | Boom anti-tripping mechanism as well as crane boom and construction crane comprising boom anti-tripping mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103232002A CN103232002A (en) | 2013-08-07 |
| CN103232002B true CN103232002B (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310166850.4A Active CN103232002B (en) | 2013-05-08 | 2013-05-08 | Boom anti-tripping mechanism as well as crane boom and construction crane comprising boom anti-tripping mechanism |
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| CN109573857B (en) * | 2018-12-04 | 2020-07-28 | 青岛大学 | Anti-overturning pedestal crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4492311A (en) * | 1981-08-17 | 1985-01-08 | Fmc Corporation | Coupling and latching mechanism for extensible boom |
| CN201801331U (en) * | 2010-08-31 | 2011-04-20 | 辽宁抚挖重工机械股份有限公司 | Self-suction type oil cylinder anti-overturn device |
| CN203237960U (en) * | 2013-05-08 | 2013-10-16 | 中联重科股份有限公司 | Tilt-preventing type structure of cantilever crane as well as hoisting cantilever crane and construction crane including same |
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