CN107939819A - Drag link mechanism and crane - Google Patents
Drag link mechanism and crane Download PDFInfo
- Publication number
- CN107939819A CN107939819A CN201711078815.1A CN201711078815A CN107939819A CN 107939819 A CN107939819 A CN 107939819A CN 201711078815 A CN201711078815 A CN 201711078815A CN 107939819 A CN107939819 A CN 107939819A
- Authority
- CN
- China
- Prior art keywords
- eccentric bushing
- pull rod
- eccentric
- link mechanism
- drag link
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/06—Adjustable connecting-rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a kind of drag link mechanism and crane, to solve the technical problem that the of high cost of drag link mechanism, service life are short in existing crane.The drag link mechanism includes pull rod, installation axle and eccentric bushing component；Eccentric bushing component includes at least two eccentric bushings for rotating socket successively, and installation axle, at least two eccentric bushings and pull rod rotate socket successively；Pull rod is zero along the eccentricity in vertical its center axis direction.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of drag link mechanism and crane.
Background technology
Shore container crane is the special purpose crane of container terminal apron loading and unloading container ship, Container Transport
The development of ship constantly tends to maximize, therefore shore container crane completes the handling times of container using drag link mechanism
Business.
Fig. 1 is the schematic diagram of existing drag link mechanism, as shown in Figure 1, the drag link mechanism of existing crane include pull rod 1, partially
Heart set 2 and fastening assembly 3, and the first installation axle and the second installation axle 4 being oppositely arranged.Wherein, the both ends of pull rod 1 and first
Installation axle and the second installation axle 4 are corresponding hinged respectively, and eccentric bushing 2 is rotated and is socketed between the second installation axle 4 and pull rod 1, eccentric
Set 2 is detachably connected with pull rod 1 by fastening assembly 3.During concrete operations, rotating eccentricity set after fastening assembly, eccentric bushing are removed
Fastening assembly is installed after the second installation axle rotation set angle, so realizes the adjusting to rod length.
Drag link mechanism includes having 8 kinds of positions along same 8 fastening assemblies circumferentially, eccentric bushing, and pull rod is wherein
There are 8 kinds of length on heart axis direction.The eccentricity in pull rod along its center axis direction is that pull rod edge is vertical in zero, Fig. 1 in Fig. 1
The eccentricity in its center axis direction is the eccentricity of eccentric bushing, only when the inner diameter central of eccentric bushing and outer through between center
When line is overlapped with the central axis of pull rod, the eccentricity in pull rod along vertical its center axis direction is just zero.
The length when eccentricity in pull rod along vertical its center axis direction is zero in Fig. 1 only has two kinds, in remaining 6 kinds
During length, there is the eccentricity along vertical its center axis direction in pull rod, in this way, there are an additional bending moment, design for pull rod
The cross section of pull rod need to be increased during pull rod, also, the presence of the additional bending moment causes the internal stress of pull rod to be concentrated, and then cause
The service life of pull rod is short.Therefore, there are the problem of of high cost, service life is short for the drag link mechanism of existing crane.
The content of the invention
It is an object of the invention to provide a kind of drag link mechanism, with solve drag link mechanism in existing crane it is of high cost,
The short technical problem of service life.
The present invention provides a kind of drag link mechanism, which includes pull rod, installation axle and eccentric bushing component；
The eccentric bushing component includes at least two eccentric bushings for rotating socket successively, the installation axle, described at least two
A eccentric bushing and the pull rod rotate socket successively；
The pull rod is zero along the eccentricity in vertical its center axis direction.
Further, the number of the eccentric bushing is even number；
Eccentric bushing described in each two is a pair in the eccentric bushing component, and two eccentric bushings of each centering are along vertically
The sum of eccentricity is zero caused by the pull rod central axial direction.
Further, the eccentric bushing component includes two eccentric bushings, and the eccentricity of two eccentric bushings is identical.
Further, the eccentricity of at least two eccentric bushings is different.
Further, by the installation axle to the pull rod, the eccentricity of at least two eccentric bushings is in multiple successively
Set.
Further, the installation axle includes the first end and second end being radially oppositely arranged；
One end that the thickness of at least two eccentric bushings is larger is corresponding with the first end；
Less one end of thickness of at least two eccentric bushings is corresponding with the second end.
Further, the eccentric bushing component includes two eccentric bushings, is respectively that the first eccentric bushing and second are eccentric
Set；
Fastening assembly is further included, first eccentric bushing, second eccentric bushing and the pull rod pass through the fastening group
Part is detachably connected.
Further, the fastening assembly includes fastener hole group, fastening column and clamp nut；
The fastener hole group include along first eccentric bushing the first fastener hole for axially penetrating through first eccentric bushing,
Run through along the second fastener hole for axially penetrating through second eccentric bushing of second eccentric bushing, along the thickness direction of the pull rod
3rd fastener hole of the pull rod；
It is described fastening column one end pass through first fastener hole, second fastener hole and the 3rd fastener hole after with
The clamp nut is fixedly connected, so that first eccentric bushing, second eccentric bushing and the pull rod are relatively fixed.
Further, the fastening assembly is multiple；
Multiple fastening assemblies are placed equidistant with successively along the circumferential direction of the installation axle.
Further, fixation kit is further included, the installation axle, the eccentric bushing component and the pull rod pass through described solid
Determine component to be detachably connected.
Further, the fixation kit includes positioning component；
The positioning component is included along the first locating slot for extending radially through the installation axle of the installation axle and along described
The second locating slot for extending radially through the eccentric bushing component of eccentric bushing component, and positioning plate；
The positioning plate is clamped at the same time with first locating slot and second locating slot, and the both ends of the positioning plate are equal
It is connected with the pull rod, so that the installation axle, the eccentric bushing component and the pull rod are relatively fixed.
Further, the fixation kit further includes connection component；
The connection component includes the first connecting hole and edge through the positioning plate along the thickness direction of the positioning plate
The thickness direction of the pull rod runs through the second connecting hole of the pull rod, and connecting pole and attaching nut；
One end of the connecting pole is consolidated after passing through first connecting hole and second connecting hole with the attaching nut
Fixed connection, so that the positioning plate is relatively fixed with the pull rod.
Further, including two fixation kits, two fixation kits are along the axially opposing of the installation axle
Set.
Drag link mechanism provided by the invention includes pull rod, installation axle and eccentric bushing component, wherein, eccentric bushing component include according to
Secondary at least two eccentric bushings for rotating socket, installation axle, at least two eccentric bushings and pull rod rotate socket successively, due to eccentric bushing
Component includes at least two eccentric bushings, and each eccentric bushing can be rotated relative to central shaft and pull rod, therefore can pass through
One or several eccentric bushings in rotating eccentric sleeve component are with to eccentric caused by other eccentric bushings in eccentric bushing component
Away from being offset, and then realize the adjustment to the eccentricity of pull rod, make the pull rod be along the eccentricity in vertical its center axis direction
Zero.Pull rod is not present additional bending moment in use, and no need to increase the cross section of pull rod when designing pull rod, also, the inside of pull rod should
Power is evenly distributed, and pull rod is not easily damaged, thus pull rod cost is low and service life is grown, and then, the cost of drag link mechanism it is low and
Service life is grown.
Another object of the present invention, which also resides in, provides a kind of crane, which includes drag link mechanism as described above.
The beneficial effect of crane provided by the invention compared with the prior art, is same as drag link mechanism phase provided by the invention
Than in the beneficial effect of the prior art, details are not described herein again.
Brief description of the drawings
The attached drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of existing drag link mechanism；
Fig. 2 is the first schematic diagram of according to embodiments of the present invention one drag link mechanism provided；
Fig. 3 is the second schematic diagram of according to embodiments of the present invention one drag link mechanism provided；
Fig. 4 is the 3rd schematic diagram of according to embodiments of the present invention one drag link mechanism provided；
Fig. 5 is the 4th schematic diagram of according to embodiments of the present invention one drag link mechanism provided；
Fig. 6 is the first schematic diagram of according to embodiments of the present invention two drag link mechanisms provided；
Fig. 7 is the second schematic diagram of according to embodiments of the present invention two drag link mechanisms provided.
In figure：
10- installation axles；20- eccentric bushing components；30- pull rods；40- fixation kits；The first eccentric bushings of 21-；22-
Two eccentric bushings；41- positioning plates.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.Below with reference to the accompanying drawings and the present invention will be described in detail in conjunction with the embodiments.
In the description of the present invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Fig. 2 is the first schematic diagram of according to embodiments of the present invention one drag link mechanism provided, and Fig. 3 is to implement according to the present invention
Second schematic diagram of the drag link mechanism that example one provides, Fig. 4 are the 3rd showing for according to embodiments of the present invention one drag link mechanism provided
It is intended to, Fig. 5 is the 4th schematic diagram of according to embodiments of the present invention one drag link mechanism provided, and Fig. 6 is according to embodiments of the present invention
First schematic diagram of two drag link mechanisms provided, Fig. 7 are the second signals of according to embodiments of the present invention two drag link mechanisms provided
Figure.
With reference to shown in Fig. 2 to Fig. 7, drag link mechanism provided in an embodiment of the present invention includes pull rod 30, installation axle 10 and bias
Component 20 is covered, wherein, eccentric bushing component 20 includes at least two eccentric bushings for rotating socket successively, installation axle 10, at least two
Eccentric bushing and pull rod 30 rotate socket successively, and pull rod 30 is zero along the eccentricity in vertical its center axis direction.
Drag link mechanism provided by the invention includes pull rod, installation axle and eccentric bushing component, wherein, eccentric bushing component include according to
Secondary at least two eccentric bushings for rotating socket, installation axle, at least two eccentric bushings and pull rod rotate socket successively, due to eccentric bushing
Component includes at least two eccentric bushings, and each eccentric bushing can be rotated relative to central shaft and pull rod, therefore can pass through
One or several eccentric bushings in rotating eccentric sleeve component are with to eccentric caused by other eccentric bushings in eccentric bushing component
Away from being offset, and then realize the adjustment to the eccentricity of pull rod, make the pull rod be along the eccentricity in vertical its center axis direction
Zero.Pull rod is not present additional bending moment in use, and no need to increase the cross section of pull rod when designing pull rod, also, the inside of pull rod should
Power is evenly distributed, and pull rod is not easily damaged, thus pull rod cost is low and service life is grown, and then, the cost of drag link mechanism it is low and
Service life is grown.
First embodiment
In the present embodiment, the number of eccentric bushing is even number, and each two eccentric bushing is a pair in eccentric bushing component, each centering
Two eccentric bushings along the sum of eccentricity caused by vertical ties central axial direction be zero.
It is respectively the first eccentric bushing and the second eccentric bushing for example, eccentric bushing component includes two eccentric bushings, this is first eccentric
Set is identical with the eccentricity of the second eccentric bushing, and during operation, the rotation angle of first eccentric bushing and the second eccentric bushing is identical and rotation
Turn direction on the contrary, two eccentric bushings along the sum of eccentricity caused by vertical ties central axial direction are zero.
For example, eccentric bushing component includes four eccentric bushings, it is respectively the first eccentric bushing, the second eccentric bushing, three eccentricity set
With the 4th eccentric bushing, wherein, the eccentricity of the first eccentric bushing and the second eccentric bushing is identical, during operation, first eccentric bushing and
The rotation angle of two eccentric bushings is identical and direction of rotation on the contrary, the first eccentric bushing and the second eccentric bushing along vertical ties central axis
The sum of eccentricity caused by direction is zero；Three eccentricity set is identical with the eccentricity of the 4th eccentric bushing, and during operation, the 3rd is inclined
The heart cover and the direction of rotation identical with rotation angle of the 4th eccentric bushing on the contrary, three eccentricity set with the 4th eccentric bushing along vertical ties
The sum of eccentricity caused by central axial direction is zero.Wherein, the first eccentric bushing and the second eccentric bushing and three eccentricity set and
The eccentricity of 4th eccentric bushing may be the same or different, during concrete operations, the first eccentric bushing and the second eccentric bushing and the 3rd
The rotation angle of eccentric bushing and the 4th eccentric bushing may be the same or different.
With reference to shown in Fig. 2 to Fig. 5, it is preferable that in the present embodiment, eccentric bushing component 20 includes two eccentric bushings, is respectively
First eccentric bushing 21 and the second eccentric bushing 22, wherein, installation axle 10, the first eccentric bushing 21, the second eccentric bushing 22 and pull rod 30 according to
Secondary to rotate socket, the first eccentric bushing 21 can carry out rotation by axis centered on the interior axially bored line of the first eccentric bushing 21, and second is inclined
Heart set 22 can carry out rotation by axis centered on the interior axially bored line of the second eccentric bushing 22.
The eccentricity for setting the first eccentric bushing and the second eccentric bushing is 20mm, then the length adjustable extent of pull rod for [-
40mm ,+40mm].
When the first eccentric bushing and the second eccentric bushing are by square installation, the physical length of pull rod is lengthened than theoretical length
40mm, pull rod is zero along the eccentricity in vertical its center axis direction at this time；When the first eccentric bushing and the second eccentric bushing are by negative
During side's installation, the physical length of pull rod shortens 40mm than theoretical length at this time, and pull rod is along vertical its center axis direction at this time
Eccentricity is zero.
Set the first eccentric bushing and when the second eccentric bushing is in respective initial position, the eccentricity of pull rod is zero.When
When two eccentric bushings rotate 45 degree of installations by initial position, the endoporus center of the second eccentric bushing (corresponds to respect to the mounting hole of pull rod
The excircle of second eccentric bushing) 45 degree of rotation, at this time：
Second eccentric bushing is along eccentricity caused by the central axial direction of pull rod：
L1=20 × cos45 ° of Δ
Second eccentric bushing is along eccentricity caused by the central axial direction of vertical ties：
L2=20*sin45 ° of Δ
To eliminate the second eccentric bushing along eccentricity caused by the central axial direction of vertical ties, then make the first eccentric bushing
- 45 degree installations are rotated by initial position, at this time：
First eccentric bushing is along eccentricity caused by the central axial direction of pull rod：
L3=20 × cos45 ° of Δ
First eccentric bushing is along eccentricity caused by the central axial direction of vertical ties：
L4=-20 × cos45 ° of Δ
First eccentric bushing and the second eccentric bushing are combined into eccentric bushing component, central axial direction of the eccentric bushing component along pull rod
Caused eccentricity is：
L01=20mm × cos45 ° of+20mm of Δ × cos45 ° of ≈ 28.28mm
At this time, the length increment of pull rod is：
L01=20mm × cos45 ° of+20mm of Δ × cos45 ° of ≈ 28.28mm
First eccentric bushing and the second eccentric bushing are combined into eccentric bushing component, central axis of the eccentric bushing component along vertical ties
Eccentricity is caused by direction：
Δ L02=Δ L2+ Δs L4=20 × sin45 ° -20 × sin45 °=0
At this time, since the equal in magnitude and direction of the deflection angle of the first eccentric bushing and the second eccentric bushing is on the contrary, therefore
After one eccentric bushing and the combination of the second eccentric bushing, the endoporus central axis (i.e. the central axis of installation axle) and pull rod of the first eccentric bushing
The central axis outer circumferential surface of the second eccentric bushing (correspond to) of mounting hole overlap so that the first eccentric bushing offsets the second eccentric bushing
Along eccentricity caused by the central axial direction of vertical ties, realize that pull rod is along the eccentricity in vertical its center axis direction
Zero.
In the present embodiment, the eccentricity of the first eccentric bushing and the second eccentric bushing can be a variety of numerical value, the first eccentric bushing and
The setting angle of two eccentric bushings can be a variety of numerical value.During concrete operations, the rotation angle phase of the first eccentric bushing and the second eccentric bushing
It is opposite Deng, direction of rotation.
Such as first eccentric bushing and the second eccentric bushing setting angle can be 0 °, 22.5 °, 45 °, 67.5 °, 90 °,
112.5°135°、157.5°、180°.Since eccentricity of every kind of installation combination in the central axial direction of vertical ties is
0, therefore the drag link mechanism will not make pull rod produce additional bending moment.
Wherein, when the first eccentric bushing and the second eccentric bushing with 45 degree are a setting angle, accordingly, pull rod has 8 kinds
Adjustable-length.Alternatively, when the first eccentric bushing and the second eccentric bushing with 22.5 degree are a setting angle, accordingly, pull rod has 9
Kind adjustable-length.
In the present embodiment one, drag link mechanism further includes fastening assembly, and the first eccentric bushing, the second eccentric bushing and pull rod pass through tight
Gu component is detachably connected, when the first eccentric bushing and the second eccentric bushing are respectively positioned on above-mentioned initial position, pull rod is in one of which
Length, removes the fastening assembly between the first eccentric bushing, the second eccentric bushing and pull rod, makes the first eccentric bushing and the second eccentric bushing edge
Opposite direction rotates a setting angle respectively, then pull rod is changed into required length by the original length, and installation is tight at this time
Gu component, is relatively fixed the first eccentric bushing, the second eccentric bushing and pull rod, then pull rod is maintained in the required length.
Specifically, fastening assembly includes fastener hole group, fastening column and clamp nut, wherein, fastener hole group is included along first
The first fastener hole for axially penetrating through the first eccentric bushing of eccentric bushing, axially penetrate through the second eccentric bushing second along the second eccentric bushing
Fastener hole, along pull rod thickness direction run through pull rod the 3rd fastener hole；One end of column is fastened through the first fastener hole, second tight
It is fixedly connected after solid hole and the 3rd fastener hole with clamp nut, so that the first eccentric bushing, the second eccentric bushing and pull rod are relatively fixed.
Preferably, it is high-strength bolt to fasten column.
In the present embodiment one, fastening assembly is multiple, and along the circumferential direction of installation axle, equi-spaced apart is set multiple fastening assemblies successively
Put, the angle between two neighboring fastening assembly corresponds to the setting angle with the first eccentric bushing and the second eccentric bushing, to fasten
First eccentric bushing and the second eccentric bushing are positioned in required angle by component.
In other embodiment, eccentric bushing component includes two eccentric bushings, is respectively the first eccentric bushing and the second eccentric bushing, is somebody's turn to do
The eccentricity of first eccentric bushing and the second eccentric bushing is different, this kind of situation is described in detail in following embodiments two.
Embodiment two
With reference to shown in Fig. 6 and Fig. 7, in the present embodiment two, eccentric bushing component 20 includes at least two eccentric bushings, and at least two
The eccentricity all same or difference of eccentric bushing.
Preferably, in the present embodiment two, the eccentricity of at least two eccentric bushings is different, the number of eccentric bushing for odd number or
Even number, the setting angle of each eccentric bushing is 180 degree, and at least two eccentric bushings are Thin-Walled Eccentric set, by installation axle 10 to
Pull rod 30, the eccentricities of at least two eccentric bushings set in multiple successively, in this way, the eccentricity all same relative to eccentric bushing
Eccentric bushing component, after multiple eccentric bushings that eccentricity is set in multiple successively combine, exchanges any one or arbitrarily several
The installation direction of eccentric bushing, you can a kind of length is obtained, its flexibility is high, and pull rod can be made to have more kinds of adjustable-lengths, and
And the maximum length of obtained pull rod is larger, minimum length is smaller, its adjustable range is big.
Preferably, installation axle includes the first end and second end being radially oppositely arranged, the thickness of at least two eccentric bushings
Spend that larger one end is corresponding with first end, less one end of thickness of at least two eccentric bushings is corresponding with second end.
Setting eccentric bushing component include by installation axle to pull rod rotate successively the first eccentric bushing of socket, the second eccentric bushing,
Three eccentricity covers and the 4th eccentric bushing, wherein, the eccentricity of the first eccentric bushing is 2.5mm, and the eccentricity of the second eccentric bushing is
5mm, the eccentricity of three eccentricity set is 10mm, and the eccentricity of the 4th eccentric bushing is 20mm.
When the first eccentric bushing, the second eccentric bushing, three eccentricity set and the 4th eccentric bushing are by positive installation, eccentric bushing group
Total eccentricity caused by part along the central axial direction of pull rod is+37.5mm, and the physical length of pull rod is lengthened than theoretical length
37.5mm, pull rod is zero along the eccentricity in vertical its center axis direction at this time；When the first eccentric bushing and the second eccentric bushing are pressed
When losing side is installed, total eccentricity is -37.5mm caused by eccentric bushing component along the central axial direction of pull rod, at this time pull rod
Eccentricity along vertical its center axis direction is zero.
After first eccentric bushing, the second eccentric bushing, three eccentricity set and the combination of the 4th eccentric bushing, then the adjustable model of the length of pull rod
Enclose for [- 37.5mm ,+37.5mm], total eccentricity caused by eccentric bushing component along the central axial direction of vertical ties is
Zero.
The peace of an eccentric bushing in the first eccentric bushing of any exchange, the second eccentric bushing, three eccentricity set and the 4th eccentric bushing
Direction is filled, pull rod can obtain a kind of length.In this setting embodiment, it is possible to achieve the length change increase and decrease of 5mm, i.e.,
37.5mm, 32.5mm, 27.5mm, 22.5mm, 17.5mm, 12.5mm, 7.5mm, 2.5mm, -2.5mm, -7.5mm, -
The adjusting of 12.5mm, -17.5mm, -22.5mm, -27.5mm, -32.7mm, -37.5mm totally 16 kinds of length.
For example, when the first eccentric bushing negative sense installation and the second eccentric bushing, the three eccentricity set and positive peace of the 4th eccentric bushing
During dress：
Eccentricity is caused by eccentric bushing component along the central axial direction of pull rod：
Δ L=-2.5+5+10+20=32.5mm.
Similarly, the direction of different eccentric bushings is exchanged, it is possible to achieve the combination of different eccentricities.The number of appropriate increase and decrease eccentric bushing
Amount or the eccentricity for suitably adjusting each eccentric bushing, can obtain the combination of different eccentricities.Inside and outside all eccentric bushings
Footpath center is on the center line of pull rod, and therefore, the combination regulation mode of this kind of eccentric bushing component is not present in pull rod
The eccentricity of mandrel line, the drag link mechanism will not produce additional bending moment to pull rod.
Certainly, also can arbitrarily exchange the first eccentric bushing, the second eccentric bushing, three eccentricity set and the 4th eccentric bushing in two or
The installation direction of three eccentric bushings.
In the present embodiment two, which further includes fixation kit 40, installation axle 10, eccentric bushing component 20 and pull rod 30
It is detachably connected by fixation kit 40.
Installation axle 10, eccentric bushing component 20 and pull rod 30 are detachably connected by fixation kit 40, at least two eccentric bushings
When being respectively positioned on first position, pull rod is in one of which length, removes tight between installation axle, at least two eccentric bushings and pull rod
Gu component, makes wherein any one or several eccentric bushings exchange installation direction, then pull rod is changed into required by the original length
Length, fastening assembly is installed at this time, is relatively fixed installation axle, at least two eccentric bushings and pull rod, then pull rod is maintained at this
In required length.
Specifically, fixation kit 40 includes positioning component, which includes extending radially through installation along installation axle 10
First locating slot of axis 10 and the second locating slot for extending radially through eccentric bushing component 20 along eccentric bushing component 20, and positioning plate
41；
Setting eccentric bushing component include four eccentric bushings, be respectively the first eccentric bushing, the second eccentric bushing, three eccentricity cover and
4th eccentric bushing, then the second locating slot radially sequentially pass through the first eccentric bushing, the second eccentric bushing, three eccentricity set and the 4th inclined
Heart set, positioning plate 41 are clamped at the same time with the first locating slot and the second locating slot, and the both ends of positioning plate 41 are connected with pull rod 30, with
It is relatively fixed installation axle 10, eccentric bushing component 20 and pull rod 30.
Fixation kit further includes connection component, and connection component includes running through the first of positioning plate along the thickness direction of positioning plate
Connecting hole and run through the second connecting hole of pull rod along the thickness direction of pull rod, and connecting pole and attaching nut, the one of connecting pole
It is fixedly connected after holding through the first connecting hole and the second connecting hole with attaching nut, so that positioning plate is relatively fixed with pull rod.
Above-mentioned fixation kit is two, axially opposing setting of two fixation kits along installation axle, so that eccentric bushing group
The axial location of part is fixed.
The another object of the embodiment of the present invention, which also resides in, provides a kind of crane, which includes draw-bar machine as above
Structure.
The beneficial effect of crane provided in an embodiment of the present invention compared with the prior art, is same as offer of the embodiment of the present invention
Drag link mechanism beneficial effect compared with the prior art, details are not described herein again.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.
Claims (14)
1. a kind of drag link mechanism, it is characterised in that including pull rod (30), installation axle (10) and eccentric bushing component (20)；
The eccentric bushing component (20) includes rotating at least two eccentric bushings of socket successively, the installation axle (10), it is described extremely
Few two eccentric bushings and the pull rod (30) rotate socket successively；
The pull rod (30) is zero along the eccentricity in vertical its center axis direction.
2. drag link mechanism according to claim 1, it is characterised in that the number of the eccentric bushing is even number；
Eccentric bushing described in each two is a pair in the eccentric bushing component (20), and two eccentric bushings of each centering are along vertically
The sum of eccentricity is zero caused by the pull rod central axial direction.
3. drag link mechanism according to claim 2, it is characterised in that the eccentric bushing component (20) is described inclined including two
Heart set, the eccentricity of two eccentric bushings are identical.
4. drag link mechanism according to claim 1, it is characterised in that the eccentricity of at least two eccentric bushings is not
Together.
5. drag link mechanism according to claim 4, it is characterised in that by the installation axle (10) to the pull rod (30),
The eccentricity of at least two eccentric bushings is set in multiple successively.
6. drag link mechanism according to claim 4, it is characterised in that the installation axle (10) includes radially opposite set
The first end and second end put；
One end that the thickness of at least two eccentric bushings is larger is corresponding with the first end；
Less one end of thickness of at least two eccentric bushings is corresponding with the second end.
7. drag link mechanism according to claim 1, it is characterised in that the eccentric bushing component (20) is described inclined including two
Heart set, is respectively the first eccentric bushing (21) and the second eccentric bushing (22)；
Fastening assembly is further included, first eccentric bushing (21), second eccentric bushing (22) and the pull rod (30) pass through institute
Fastening assembly is stated to be detachably connected.
8. drag link mechanism according to claim 7, it is characterised in that the fastening assembly includes fastener hole group, fastening column
And clamp nut；
The fastener hole group includes axially penetrating through the first tight of first eccentric bushing (21) along first eccentric bushing (21)
Solid hole, along the second fastener hole for axially penetrating through second eccentric bushing (22) of second eccentric bushing (22), along the pull rod
(30) thickness direction runs through the 3rd fastener hole of the pull rod (30)；
It is described fastening column one end pass through first fastener hole, second fastener hole and the 3rd fastener hole after with it is described
Clamp nut is fixedly connected, so that first eccentric bushing (21), second eccentric bushing (22) and the pull rod (30) are opposite
It is fixed.
9. drag link mechanism according to claim 7, it is characterised in that the fastening assembly is multiple；
Multiple fastening assemblies are placed equidistant with successively along the circumferential direction of the installation axle (10).
10. drag link mechanism according to claim 1, it is characterised in that further include fixation kit (40), the installation axle
(10), the eccentric bushing component (20) and the pull rod (30) are detachably connected by the fixation kit (40).
11. drag link mechanism according to claim 10, it is characterised in that the fixation kit (40) includes positioning component；
The positioning component is included along the first locating slot for extending radially through the installation axle (10) of the installation axle (10) and edge
The second locating slot for extending radially through the eccentric bushing component (20) of the eccentric bushing component (20), and positioning plate (41)；
The positioning plate (41) is clamped at the same time with first locating slot and second locating slot, and the two of the positioning plate (41)
End is connected with the pull rod (30), so that the installation axle (10), the eccentric bushing component (20) and the pull rod (30) phase
To fixation.
12. drag link mechanism according to claim 11, it is characterised in that the fixation kit (40) further includes connection group
Part；
The connection component includes the first connecting hole for running through the positioning plate (41) along the thickness direction of the positioning plate (41)
Run through the second connecting hole of the pull rod (30), and connecting pole and attaching nut with the thickness direction along the pull rod (30)；
One end of the connecting pole connects after passing through first connecting hole and second connecting hole with attaching nut fixation
Connect, so that the positioning plate (41) is relatively fixed with the pull rod (30).
13. drag link mechanism according to claim 10, it is characterised in that including two fixation kits (40), two
Axially opposing setting of the fixation kit (40) along the installation axle (10).
14. a kind of crane, it is characterised in that including the drag link mechanism as any one of claim 1-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078815.1A CN107939819A (en) | 2017-11-06 | 2017-11-06 | Drag link mechanism and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078815.1A CN107939819A (en) | 2017-11-06 | 2017-11-06 | Drag link mechanism and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107939819A true CN107939819A (en) | 2018-04-20 |
Family
ID=61934345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711078815.1A Pending CN107939819A (en) | 2017-11-06 | 2017-11-06 | Drag link mechanism and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107939819A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441963A (en) * | 2018-12-16 | 2019-03-08 | 中国航发沈阳发动机研究所 | A kind of length and angle adjustment structure |
| CN113547324A (en) * | 2021-07-14 | 2021-10-26 | 青岛德盛利立体停车设备有限公司 | Correction device for error of center distance of connecting rod |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431540A (en) * | 1993-12-14 | 1995-07-11 | United Technologies Corporation | Main rotor pitch control rod subassembly |
| CN203477046U (en) * | 2013-10-15 | 2014-03-12 | 黄石东贝电器股份有限公司 | Eccentric type connecting rod |
| CN205873729U (en) * | 2016-06-14 | 2017-01-11 | 太重（天津）滨海重型机械有限公司 | Hoist pull rod device |
| CN206129822U (en) * | 2016-11-04 | 2017-04-26 | 北京汽车动力总成有限公司 | Variable off -centre apart from pin structure |
-
2017
- 2017-11-06 CN CN201711078815.1A patent/CN107939819A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431540A (en) * | 1993-12-14 | 1995-07-11 | United Technologies Corporation | Main rotor pitch control rod subassembly |
| CN203477046U (en) * | 2013-10-15 | 2014-03-12 | 黄石东贝电器股份有限公司 | Eccentric type connecting rod |
| CN205873729U (en) * | 2016-06-14 | 2017-01-11 | 太重（天津）滨海重型机械有限公司 | Hoist pull rod device |
| CN206129822U (en) * | 2016-11-04 | 2017-04-26 | 北京汽车动力总成有限公司 | Variable off -centre apart from pin structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109441963A (en) * | 2018-12-16 | 2019-03-08 | 中国航发沈阳发动机研究所 | A kind of length and angle adjustment structure |
| CN113547324A (en) * | 2021-07-14 | 2021-10-26 | 青岛德盛利立体停车设备有限公司 | Correction device for error of center distance of connecting rod |
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