WO2011020374A1 - 一种平衡重装卸装置及移动式起重机 - Google Patents

一种平衡重装卸装置及移动式起重机 Download PDF

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Publication number
WO2011020374A1
WO2011020374A1 PCT/CN2010/074370 CN2010074370W WO2011020374A1 WO 2011020374 A1 WO2011020374 A1 WO 2011020374A1 CN 2010074370 W CN2010074370 W CN 2010074370W WO 2011020374 A1 WO2011020374 A1 WO 2011020374A1
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WO
WIPO (PCT)
Prior art keywords
tray
fixed
telescopic
turntable
mobile crane
Prior art date
Application number
PCT/CN2010/074370
Other languages
English (en)
French (fr)
Inventor
刘会敏
刘木南
张鑫
Original Assignee
湖南三一智能控制设备有限公司
三一汽车制造有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 湖南三一智能控制设备有限公司, 三一汽车制造有限公司 filed Critical 湖南三一智能控制设备有限公司
Priority to US13/380,359 priority Critical patent/US8739989B2/en
Priority to EP10809507.6A priority patent/EP2436639B1/en
Priority to AU2010285413A priority patent/AU2010285413B2/en
Priority to BR112012003458A priority patent/BR112012003458A2/pt
Publication of WO2011020374A1 publication Critical patent/WO2011020374A1/zh

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Classifications

    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/74—Counterweights or supports for balancing lifting couples separate from jib

Definitions

  • the present invention relates to the field of crane technology, and more particularly to a counterweight handling device, and to a mobile crane having the above-described counterweight handling device. Background technique
  • the crane is a commonly used construction machine.
  • the crane mainly includes rail cranes and non-railways, mobile cranes, and mobile cranes include all-terrain cranes, tire cranes, crawler cranes, etc.
  • Mobile cranes are widely used in engineering construction because of their good passability, flexibility, fast driving speed, rapid transfer, and immediate access to the destination.
  • the mobile crane is limited by its own weight and has a small lifting capacity.
  • the mobile crane is usually equipped with a counterweight.
  • the balance weight is the main structural part of the mobile crane.
  • the weight of the counterweight has a great influence on the stability and lifting performance of the crane.
  • Small-tonnage mobile cranes usually adopt the structure of their own fixed balance weight.
  • the balance weight is fixed on the fuselage of the mobile crane, and the balance weight moves and works with the mobile crane.
  • the lifting weight is small, the weight of the required balance weight is also small, the balance weight is fixedly set on the fuselage, the balance weight does not need to be disassembled, and the overall structure is compact and the movement is flexible.
  • the balance weight can only be reasonably arranged with limited space.
  • the balance weight is set as the movable part, that is, the mobile crane does not carry the counterweight when driving, and will be balanced when working. Reinstalled on the fuselage.
  • the counterweight is mounted on the fuselage by the counterweight loading and unloading mechanism, and the counterweight is removed from the fuselage.
  • the structure of the traditional counterweight loading and unloading mechanism is generally symmetrically provided with a left lifting cylinder and a right lifting cylinder on both sides of the turntable.
  • the left lifting cylinder and the right lifting cylinder have piston rods upward and a left movable pulley and a right movable pulley respectively disposed at the top thereof.
  • the left side of the turntable is symmetrically provided with a left fixed pulley and a right fixed pulley, and one end of the left wire rope wound around the pulley set composed of the left movable pulley and the left fixed pulley is fixed on the turntable, and the other end is provided with a left hanging heavy hook.
  • One end of a right wire rope wound around a pulley block composed of the right movable pulley and the right fixed pulley is fixed on the turntable, and the other end is provided with a right hanging weight hook, and a left locking cylinder is further provided on both sides of the turntable And right lock cylinder.
  • the balance weight loading and unloading mechanism is composed of a lifting cylinder, a locking cylinder, a hoisting steel wire rope and a pulley block.
  • the balance reinstalling method is: when the mobile crane is in place to lay the legs, the rotary table can be rotated, and the mobile crane passes through the lifting device itself.
  • the cylinder and the right locking cylinder make the pin on the left locking cylinder and the right locking cylinder extend, and insert the fixing hole provided on the balance weight tray to fix the balance weight tray; the left lifting cylinder and the right lifting cylinder are slightly retracted to avoid the left
  • the lifting cylinder, the right lifting cylinder, the left wire rope and the right wire rope are loaded during the lifting operation.
  • the method of unloading the counterweight is the reverse of the method of loading the counterweight described above.
  • the balance weight loading and unloading mechanism of this structure sets the left lift cylinder, the right lift cylinder, the left lock cylinder, and the right lock cylinder on the turntable of the mobile crane, and the volume of each component of the large tonnage and oversized tonnage mobile crane itself.
  • the components are more compact, the space between the components is limited, if the left lift cylinder, the right lift cylinder, the left lock on the turntable.
  • the cylinder and the right locking cylinder will cause the space on the turntable to be very narrow, which will affect the normal rotation of the turntable, which will seriously affect the working performance of the mobile crane.
  • An object of the present invention is to provide a counterweight loading and unloading device which is more rationally arranged in a position to provide sufficient space on the turntable of the mobile crane and a more compact structure.
  • the present invention provides a balance weight loading and unloading device, comprising a separately arranged tray, an upper end surface of the two ends of the tray is used for placing a balance weight, and both ends of the tray have a cavity, the space A plurality of telescopic cylinders are disposed in the cavity, and the fixed end of the telescopic cylinder is fixed to the tray, and the telescopic end of the telescopic cylinder is connected with the tray lifting mechanism for lifting the tray.
  • the tray lifting mechanism comprises a fixed pulley, a movable pulley and a steel wire rope wound around the fixed pulley and the movable pulley, the movable pulley is fixed at a telescopic end of the telescopic cylinder, and the fixed pulley is fixed on the tray
  • the first end to the second end of the wire rope are sequentially wound around the fixed pulley and the movable pulley, and the first end of the wire rope is detachably connected with the ear plate disposed on the turntable of the mobile crane, A second end of the wire rope is secured to the tray.
  • the tray lifting mechanism comprises a fixed pulley and a steel wire rope wound around the fixed pulley, the fixed pulley is fixed on the tray, and the first end of the steel cord and the ear disposed on the turntable of the mobile crane The plate is detachably connected, and the second end of the wire rope is fixed to the telescopic end of the telescopic cylinder.
  • the tray lifting mechanism comprises a fixed sprocket, a moving sprocket and a chain around the fixed sprocket and the moving sprocket, wherein the moving sprocket is fixed on the telescopic end of the telescopic cylinder,
  • the fixed sprocket is fixed on the tray, and the first end to the second end of the chain are sequentially wound around the fixed sprocket and the moving sprocket, and the first end of the chain is on the turntable of the mobile crane
  • the ear plate is detachably connected, and the second end of the chain is fixed to the tray.
  • the tray lifting mechanism comprises a fixed sprocket and a chain around the fixed sprocket, the fixed sprocket is fixed on the tray, and the first end of the chain is on the turntable of the mobile crane
  • the ear plate is detachably connected, and the second end of the chain is fixed to the telescopic end of the telescopic cylinder.
  • the number of telescopic cylinders in each of the cavities is one or two.
  • the tray is further provided with a tray fixing member of not less than one, and the tray fixing member can be pinned with a fixing pin provided at a rear end of the turntable of the mobile crane.
  • the number of the tray fixing members is four.
  • a mobile crane includes the above-described counterweight loading and unloading device.
  • the rear end of the turntable of the mobile crane is provided with a fixed number of not less than one.
  • the balance weight loading and unloading device provided by the present invention comprises a separately arranged tray, the upper end faces of the two ends of the tray are used for placing a balance weight, and both ends of the tray have cavities extending along the length of the tray, and the cavity is A plurality of telescopic cylinders are provided, and the fixed end of the telescopic cylinder is fixed to the tray, and the telescopic end of the telescopic cylinder is connected with a tray lifting mechanism for lifting the tray.
  • the tray lifting mechanism may be a pulley mechanism composed of a fixed pulley, a movable pulley and a wire rope wound around the fixed pulley and the movable pulley, the movable pulley is fixed to a telescopic end of the telescopic cylinder, and the fixed pulley is fixed at the On the tray, the first end to the second end of the wire rope are sequentially wound around the fixed pulley and the movable pulley, and the first end of the wire rope is detachably connected with the ear plate disposed on the crane turntable, and the wire rope is The second end is fixed to the tray.
  • the balance weight loading and unloading device of this type is installed as follows: The mobile crane is in place to lay the legs, the turntable can be rotated, the pallet is lifted by the mobile crane's own lifting device, and the pallet is placed on the side of the mobile crane. Position between the legs; the required balance weight is placed on the upper end faces of the two ends of the tray by the mobile crane's own lifting device. After the balance weight is placed neatly, the turntable is turned, so that the rear end of the turntable is turned to the tray.
  • the balance weight loading and unloading device of the structure is provided with a cavity extending in the length direction of the tray in the tray, and the telescopic cylinder providing the lifting power is disposed in the cavity in the tray, and the telescopic cylinder no longer occupies the space where the turntable is located,
  • the counterweight handling device is no longer subject to the frame of the mobile crane
  • the limitation of the height of the space and the turret does not affect the normal rotation of the turret, which guarantees the working performance of the mobile crane; the counterweight loading and unloading device will not increase the overall size of the mobile crane, so that the overall size of the mobile crane will not exceed Road driving standards, the structure of the whole machine is more compact.
  • the telescopic cylinder also has a certain weight, and the telescopic oil rainbow is placed in the tray.
  • the telescopic cylinder can also play the role of balance weight, so that the force of the turntable is more reasonable, and the stability of the mobile crane will be improved;
  • the structure of the wire rope and the pulley block, the tray lifting device is a flexible connection, and the field operation cylinder is safe, reliable and reliable.
  • the present invention also provides a mobile crane having the above-described counterweight loading and unloading device. Since the above-described counterweight loading and unloading device has the above-described technical effects, the mobile crane having the counterweight loading and unloading device should also have corresponding technical effects. DRAWINGS
  • FIG. 1 is a schematic perspective view showing a specific embodiment of a balanced heavy loading and unloading device according to the present invention
  • FIG. 2 is a schematic view showing the working principle of the balanced heavy loading and unloading device provided by the present invention
  • Figure 3 is a schematic cross-sectional view taken along line A in Figure 2;
  • Figure 4 is a schematic plan view of Figure 2;
  • Figure 5 is a schematic view showing the structure of the counterweight loading and unloading device provided in the hoisting position of the present invention
  • Figure 6 is a schematic view showing the structure of the counterweight loading and unloading device provided in the working position
  • a tray 10 a first telescopic oil rainbow 11, a second telescopic oil rainbow 12, a third telescopic oil rainbow 13, a fourth telescopic oil rainbow 14, a wire rope 21, a first cable segment 21-1, a second cable segment 21-2,
  • the core of the present invention is to provide a counterweight loading and unloading device which is more rationally arranged to provide sufficient space on the turntable of the mobile crane and a more compact structure.
  • Another core of the invention is to provide a mobile crane.
  • FIG. 1 is a schematic perspective structural view of a specific embodiment of a balanced heavy loading and unloading device according to the present invention.
  • the balance weight loading and unloading device comprises a tray 10 which is independently provided.
  • the upper end faces of the two ends of the tray 10 are used for placing the balance weight 61, and both ends of the tray 10 have an empty space extending along the length of the tray 10.
  • the cavity has a plurality of telescopic cylinders in the cavity, and the fixed end of each telescopic cylinder is fixed to the tray 10, and the telescopic end of each telescopic cylinder is connected with the tray lifting mechanism for lifting the tray 10.
  • each of the two ends of the tray 10 is provided with two telescopic cylinders.
  • a first telescopic cylinder 11 and a second telescopic tube are disposed in the cavity of the end of the tray 10 .
  • the oil rainbow 12 has a third telescopic oil rainbow 13, a fourth telescopic oil rainbow 14, a first telescopic cylinder 11, a second telescopic cylinder 12, a third telescopic cylinder 13, and a fourth telescopic cylinder 14 in the cavity at the other end.
  • the telescopic ends are all disposed in the end direction of the tray 10. It is also possible to provide only one telescopic cylinder in each cavity at both ends of the tray 10. The present invention does not limit the number of telescopic cylinders provided in each cavity.
  • the first telescopic oil red 11, the second telescopic oil red 12, the third telescopic oil red 13, and the telescopic end of the fourth telescopic cylinder 14 are each connected with a tray lifting mechanism, and the following is a tray connected to the telescopic end of the first telescopic cylinder 11 Take the lifting mechanism as an example to introduce it.
  • the tray lifting mechanism connected to the telescopic end of the first telescopic cylinder 11 includes a movable pulley 31, a fixed pulley 41, and a wire rope 21 wound around the movable pulley 31 and the fixed pulley 41.
  • the movable pulley 31 is fixed at the first The telescopic end of the telescopic cylinder 11 , the movable pulley 31 can reciprocate along the longitudinal direction of the tray 10 along with the telescopic end of the first telescopic cylinder 11 , and the fixed pulley 41 is fixed on the tray 10 , and the first end to the second end of the steel cord 21 are sequentially wound around
  • the fixed pulley 41 and the movable pulley 31 are disposed, and the first end of the wire rope 21 is detachably connected to the ear plate 71 disposed on the turntable 70 of the mobile crane, and the second end of the wire rope 21 is fixed on the tray 10.
  • first end and the second end of the wire rope 21 are connected and fixed, and the first cable joint 21-1 and the second cable joint 21-2 are respectively disposed at the first end and the second end of the wire rope 21, and the first cable joint 21-2
  • Both the second cable joint 21-2 and the second cable joint 21-2 can be connected to the ear plate and the tray 10 on the turntable by means of pinning.
  • FIG. 2 is a balanced reloading provided by the present invention.
  • the expansion and contraction amount of the first telescopic cylinder 11 is In the case of L, the amount of movement of the wire rope 21 will be 2L, that is, the amount of movement of the tray 10 in the vertical direction is also 2L, and the first telescopic cylinder 11 can lift the tray 10 by a large amount of displacement with a small amount of movement.
  • a plurality of steel wire ropes can be used, and the number of the wire ropes 21 can be set as needed.
  • the tray lifting mechanisms respectively connected to the telescopic ends of the second telescopic oil red 12, the third telescopic oil red 13, and the fourth telescopic oil red 14 are similar to the tray lifting mechanism connected to the first telescopic cylinder 11, and are not used here. Detailed introduction.
  • a tray fixing member 51 is provided on the tray, and the tray fixing member 51 is provided. It may be a connecting plate having a pin-receiving hole, and correspondingly, a fixing pin 72 matching the tray fixing member 51 is provided on the turntable 70 of the mobile crane, and the fixing pin 72 can be fixedly fixed to the tray fixing member 51. connection.
  • FIG. 2 is a schematic view showing the working principle of the balanced heavy loading and unloading device according to the present invention
  • FIG. 3 is a cross-sectional view of the A direction in FIG. 2
  • FIG. 2 is a schematic structural view of a top view
  • FIG. 5 is a schematic structural view of the balanced heavy loading and unloading device provided in the hoisting position of the present invention
  • FIG. 6 is a structural schematic view of the balanced heavy loading and unloading device provided by the present invention in a working position.
  • the method for installing the counterweight of the counterweight loading and unloading device is as follows: The mobile crane is in place to lay the legs, and after the turntable 70 can be rotated, the tray 10 is lifted by the lifting device of the mobile crane itself, and the tray 10 is placed on the mobile The position between the legs of the side body of the crane; the required balance weight 61 is placed on the upper end faces of the two ends of the tray 10 by the lifting device of the mobile crane itself, and after the balance weight 61 is placed neatly, the turntable 70 is turned on, so that The rear end of the turntable 70 is turned directly above the tray 10, and the first cable joint 21-1 of the first end of the wire rope 21 is set on the turntable 70.
  • the ear plate 71 is connected; driving the first telescopic oil rainbow 11, the second telescopic oil rainbow 12, the third telescopic oil rainbow 13, the fourth telescopic cylinder 14, the first telescopic cylinder 11, the second telescopic cylinder 12, and the third telescopic oil
  • the telescopic ends of the rainbow 13 and the fourth telescopic oil rainbow 14 all protrude toward the end of the tray 10, and the telescopic end of each telescopic oil rainbow moves the movable pulley 31 toward the end of the tray 10, because the first end of the wire rope 21 and the turntable 70 Fixed, the second end of the wire rope 21 is fixed on the tray 10.
  • the wire rope 21 is tightened, and under the action of the tension of the wire rope 21, the tray 21 and the balance weight 61 placed on the tray 21 are gradually lifted;
  • the tray fixing device 51 provided on the tray 21 is fixedly coupled to the fixing pin 72 provided on the turntable 70, and the tray 21 and the counterweight 61 are fixed.
  • the process of removing the tray 21 and the counterweight 61 is reversed from the above process and will not be described in detail herein.
  • the balance weight loading and unloading device provided by the present invention is provided with a cavity extending in the longitudinal direction of the tray 10 in the tray 10, and a first telescopic cylinder 11, a second telescopic cylinder 12, a third telescopic cylinder 13, and a fourth, which provide lifting power.
  • the telescopic cylinder 14 is disposed in the cavity in the tray 10, and each telescopic cylinder will no longer occupy the space where the turntable 70 is located.
  • the counterweight loading and unloading device is no longer limited by the frame space of the mobile crane and the height of the turntable, and will not Affecting the normal rotation of the turntable 70 ensures the working performance of the mobile crane; the balanced heavy loading and unloading device will not increase the overall size of the mobile crane, so that the overall size of the mobile crane does not exceed the road driving standard, the structure of the whole machine More compact.
  • the first telescopic cylinder 11, the second telescopic cylinder 12, the third telescopic cylinder 13, and the fourth telescopic cylinder 14 also have a certain weight, and the first telescopic cylinder 11, the second telescopic cylinder 12, the third telescopic cylinder 13, and the fourth
  • the telescopic oil rainbow 14 is disposed in the tray 10, and each telescopic cylinder can also function as a counterweight, so that the force of the turntable 70 is more reasonable, and the stability of the mobile crane is effectively improved.
  • the pallet lifting device adopts the structure of the wire rope 21 and the pulley block.
  • the pallet lifting device is a flexible connection, and the field operation cylinder is safe, reliable and reliable.
  • the tray lifting mechanism in the above embodiment is only a tray lifting mechanism of the structure provided by the present invention, and the present invention is not limited thereto, and the tray lifting mechanism for lifting the tray by the expansion and contraction of the telescopic cylinder should be protected by the present invention.
  • a fixed pulley structure is employed. The following is a brief introduction to the tray lifting mechanism using only one fixed pulley.
  • the tray lifting mechanism connected to the telescopic end of the first telescopic cylinder 11 includes a fixed pulley and a wire rope wound around the fixed pulley.
  • the position of the fixed pulley is similar to the position of the fixed pulley 41 in the above embodiment, and the fixed pulley is fixed on the tray 10,
  • the first end of the wire rope is detachably connected to the ear plate 71 disposed on the turntable 70 of the mobile crane, and the second end of the wire rope is fixed to the telescopic end of the first telescopic cylinder 11 .
  • the first end of the wire rope is convenient
  • the second end is fixedly connected, and the cable ends are respectively disposed at the first end and the second end of the wire rope.
  • the tray lifting mechanism of this configuration when the telescopic amount of the telescopic end of the first telescopic cylinder 11 is L, the amount of movement of the wire rope is also L, that is, the amount of movement of the tray 10 in the vertical direction is also L.
  • the remaining implementation process is similar to the above embodiment, and will not be described in detail herein.
  • the tray lifting mechanism in the above embodiment is composed of a pulley block and a wire rope.
  • the balance weight loading and unloading device provided by the present invention is not limited thereto, and the tray lifting mechanism may also be composed of a sprocket set and a chain, which will be carried out in the following embodiments. The introduction of the tube.
  • the tray lifting mechanism connected to the telescopic end of the first telescopic cylinder 11 will be described as an example.
  • the tray lifting mechanism connected to the telescopic end of the first telescopic cylinder 11 includes a moving sprocket, a fixed sprocket, and a chain around the moving sprocket and the fixed sprocket, and the moving sprocket is fixed at
  • the telescopic end of the first telescopic cylinder 11 , the moving sprocket can reciprocate along the length direction of the tray 10 along with the telescopic end of the first telescopic cylinder 11 , and the fixed sprocket is fixed on the tray 10 , and the first end to the second end of the chain are sequentially
  • the first end of the chain is detachably connected to the ear plate 71 provided on the turntable 70 of the mobile crane, and the second end of the chain is fixed on the tray 10.
  • the movement amount of the chain will be 2L, that is, the movement amount of the tray 10 in the vertical direction is also 2L, and the first telescopic cylinder 11 has a small movement amount.
  • the tray 10 can be lifted by a large amount of displacement.
  • the structure of the sprocket set is not limited to the above-described structure.
  • the tray lifting mechanism for lifting the tray by the expansion and contraction of the telescopic cylinder should be within the protection scope of the present invention, for example, only one fixed sprocket structure is adopted. The following is a brief introduction to the pallet lifting mechanism using only one fixed sprocket.
  • the tray lifting mechanism connected to the telescopic end of the first telescopic cylinder 11 includes a fixed sprocket and a chain around the fixed sprocket.
  • the position of the fixed sprocket is similar to the position of the fixed sprocket in the above embodiment, and the fixed sprocket is fixed.
  • the first end of the chain is detachably connected to the ear plate 71 provided on the turntable 70 of the mobile crane, and the second end of the chain is fixed to the telescopic end of the first telescopic cylinder 11.
  • the tray lifting mechanism of this configuration when the amount of expansion and contraction of the telescopic end of the first telescopic cylinder 11 is L, the amount of movement of the chain is also L, that is, the amount of movement of the tray 10 in the vertical direction is also L.
  • the remaining implementation process is similar to the above embodiment, and will not be described in detail herein.
  • the present invention also provides a mobile crane having the above-described counterweight loading and unloading device. Since the above-mentioned balance heavy loading and unloading device has the above technical effects, the mobile crane having the balanced heavy loading and unloading device should also have corresponding technical effects, and will not be described in detail herein.

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Description

一种平衡重装卸装置及移动式起重机 本申请要求于 2009 年 08 月 19 日提交中国专利局、 申请号为 200910166487.X, 发明名称为"一种平衡重装卸装置及移动式起重机"的中 国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及起重机技术领域， 尤其涉及一种平衡重装卸装置， 还涉及 一种具有上述平衡重装卸装置的移动式起重机。 背景技术
起重机是一种常用的工程机械， 起重机主要包括轨道式起重机和非轨 道、 移动式起重机， 移动式起重机又包括全路面起重机、 轮胎式起重机、 履带式起重机等。 移动式起重机具有通过性好、 机动灵活、 行驶速度快、 可快速转移、 到达目的地能马上投入工作等优点， 因此广泛应用于工程施 工中。 但是， 与轨道式起重机相比， 移动式起重机受其自身重量的限制， 其起吊能力较小， 为了提高移动式起重机在工作状态下的稳定性， 通常在 移动式起重机上装配有平衡重。
平衡重是移动式起重机的主要结构件， 平衡重的重量对起重机的稳定 性及起重性能有很大的影响。 小吨位的移动式起重机通常采用自身固定平 衡重的结构形式， 平衡重固定设置在移动式起重机的机身上， 平衡重随移 动式起重机一起移动、 工作。 对于小吨位的移动式起重机， 其起重量较小， 所需平衡重的重量也较小， 平衡重固定设置在机身上， 平衡重不需拆卸， 整体结构紧凑、 移动灵活。
移动式起重机逐渐向大吨位、 超大吨位的方向发展， 移动式起重机的 平衡重的重量和空间尺寸也不断的增加， 同时起重机本身的各部件的体积 也会越来越大， 而道路标准和底盘的运载能力限制了平衡重的设置，所以， 只能利用有限的空间合理布置好平衡重， 通常将平衡重设置成为活动件， 即移动式起重机行车的时候不带配重， 工作时再将平衡重安装在机身上。 通过平衡重装卸机构将平衡重安装在机身上、 从机身上将平衡重卸下。 传统平衡重装卸机构的结构一般是在转台的两侧对称设有左提升油 缸、 右提升油缸， 左提升油缸、 右提升油缸的活塞杆均向上且其顶端分别 设有左动滑轮和右动滑轮， 在转台的两侧对称设有左侧定滑轮和右侧定滑 轮， 绕在由所述左动滑轮和左侧定滑轮组成的滑轮组的左钢丝绳的一端固 定在转台上， 另一端设有左吊重挂钩； 绕在由所述右动滑轮和右侧定滑轮 组成的滑轮组的右钢丝绳的一端固定在所述转台上， 另一端设有右吊重挂 钩， 在所述的转台两侧还设有左锁定油缸和右锁定油缸。
上述平衡重装卸机构由提升油缸， 锁定油缸、 吊重钢丝绳和滑轮组组 成， 其平衡重安装方法是： 当移动式起重机就位打好支腿， 转台可以回转 后， 移动式起重机通过自身起吊装置， 将所需的平衡重吊到车架侧面地上 相宜位置的平衡重托盘上， 然后转台回转， 使设有平衡重装卸机构的转台 的尾部转到平衡重的正上方， 将左右吊重挂钩挂在平衡重托盘上， 用销轴 固定好； 然后提升油缸向上伸， 从来提升平衡重托盘及平衡重， 通过转台 上的楔块和平衡重托盘上的定位块定位，保证销孔对齐，操作左锁定油缸、 右锁定油缸， 使得左锁定油缸、 右锁定油缸上的销轴伸出， 插入平衡重托 盘上设置的固定孔， 固定平衡重托盘； 将左提升油缸、 右提升油缸稍微回 缩， 避免左提升油缸、 右提升油缸及左钢丝绳、 右钢丝绳在起重作业时受 载。 卸平衡重的方法与上述装平衡重的方法过程相反。
这种结构的平衡重装卸机构， 将左提升油缸、 右提升油缸、 左锁定油 缸、 右锁定油缸均设置在移动式起重机的转台上， 大吨位、 超大吨位的移 动式起重机本身的各部件的体积均较大， 为了保证移动式起重机整体尺寸 不超过道路行驶标准， 各部件设置均较紧凑， 各部件之间的空间很有限， 如果在转台上的再设置左提升油缸、 右提升油缸、 左锁定油缸和右锁定油 缸， 会导致转台上的空间十分狭小， 将会影响到转台的正常回转， 严重影 响到移动式起重机的工作性能； 同时， 由于左提升油缸、 右提升油缸、 左 锁定油缸、 右锁定油缸均具有较大的重量， 如果其位置设置不合理， 将使 得转台的受力不合理， 严重会影响到移动式起重机的稳定性； 再者， 左提 升油缸、 右提升油缸、 左锁定油缸、 右锁定油缸均具有较大的尺寸， 其将 增大移动式起重机整车的尺寸， 使得移动式起重机的整体尺寸会超过道路 行驶标准。 发明内容
本发明的目的是提供一种平衡重装卸装置， 该平衡重装卸装置的设置 位置更加合理， 可以使得移动式起重机的转台上有足够的空间、 结构更加 紧凑。
为了实现上述目的， 本发明提供了一种平衡重装卸装置， 包括独立设 置的托盘， 该托盘两端的上端面用于放置平衡重， 所述托盘的两端均具有 一个的空腔， 所述空腔内均设置有数量不少于一个的伸缩油缸， 所述伸缩 油缸的固定端与托盘固定， 所述伸缩油缸的伸缩端与用于提升所述托盘的 托盘提升机构连接。
优选的， 所述托盘提升机构包括定滑轮、 动滑轮及绕于所述定滑轮和 所述动滑轮上的钢丝绳， 所述动滑轮固定在所述伸缩油缸的伸缩端， 所述 定滑轮固定在所述托盘上， 所述钢丝绳的第一端至第二端依次绕于所述定 滑轮、 所述动滑轮， 且所述钢丝绳的第一端与移动式起重机的转台上设置 的耳板可拆卸连接， 所述钢丝绳的第二端固定在所述托盘上。
优选的，所述托盘提升机构包括定滑轮及绕于所述定滑轮上的钢丝绳， 所述定滑轮固定在所述托盘上， 所述钢丝绳的第一端与移动式起重机的转 台上设置的耳板可拆卸连接， 所述钢丝绳的第二端固定在所述伸缩油缸的 伸缩端。
优选的， 所述托盘提升机构包括固定链轮、 移动链轮及绕于所述固定 链轮和所述移动链轮上的链条， 所述移动链轮固定在所述伸缩油缸的伸缩 端， 所述固定链轮固定在所述托盘上， 所述链条的第一端至第二端依次绕 于所述固定链轮、 移动链轮， 且所述链条的第一端与移动式起重机的转台 上设置的耳板可拆卸连接， 所述链条的第二端固定在所述托盘上。
优选的， 所述托盘提升机构包括固定链轮及绕于所述固定链轮上的链 条， 所述固定链轮固定在所述托盘上， 所述链条的第一端与移动式起重机 的转台上设置的耳板可拆卸连接， 所述链条的第二端固定在所述伸缩油缸 的伸缩端。
优选的， 每个所述空腔内的伸缩油缸的数量为一个或两个。 优选的， 所述托盘上还设有数量不少于一个的托盘固定件， 该托盘固 定件能与移动式起重机的转台后端设置的固定销形成销接。
优选的， 所述托盘固定件的数量为四个。
一种移动式起重机， 包括上述的平衡重装卸装置。
优选的，该移动式起重机的转台的后端设有数量不少于一个的固定销。 本发明提供的平衡重装卸装置， 包括独立设置的托盘， 该托盘两端的 上端面用于放置平衡重， 所述托盘的两端均具有沿托盘长度方向延伸的空 腔， 所述空腔内均设有数量不少一个的伸缩油缸， 所述伸缩油缸的固定端 与托盘固定，所述伸缩油缸的伸缩端与用于提升托盘的托盘提升机构连接。 托盘提升机构可以为由定滑轮、 动滑轮及绕于所述定滑轮和所述动滑轮上 的钢丝绳组成的滑轮机构， 所述动滑轮固定在所述伸缩油缸的伸缩端， 所 述定滑轮固定在所述托盘上， 所述钢丝绳的第一端至第二端依次绕于所述 定滑轮、 所述动滑轮， 且所述钢丝绳的第一端与起重机转台上设置的耳板 可拆卸连接， 所述钢丝绳的第二端固定在托盘上。
这种结构的平衡重装卸装置安装平衡重方法如下： 移动式起重机就位 打好支腿，转台可以回转后，通过移动式起重机自身起吊装置将托盘起吊， 并将托盘放置在移动式起重机侧身的支腿之间的位置； 通过移动式起重机 自身起吊装置将所需的平衡重放置在托盘两端的上端面上， 平衡重摆放整 齐后， 回转转台， 使得转台的后端转至托盘的正上方， 将钢丝绳的第一端 与转台上设置的耳板连接； 驱动伸缩油缸， 伸缩油缸的伸缩端向托盘端部 方向伸出， 伸缩油缸的伸缩端带动动滑轮向托盘端部方向移动， 由于钢丝 绳的第一端与转台固定， 钢丝绳的第二端固定在托盘上， 动滑轮移动的过 程中， 钢丝绳绷紧， 在钢丝绳的作用下， 托盘及放置在托盘上的平衡重逐 渐被提升； 托盘及平衡重被提升至所需位置时， 托盘上设置的托盘固定装 置与转台固定， 托盘及平衡重将被固定。 将平衡重卸下的过程与上述平衡 重安装方法的过程相反。
这种结构的平衡重装卸装置在托盘内设置有沿托盘长度方向延伸的空 腔， 将提供提升动力的伸缩油缸设置在托盘内的空腔内， 伸缩油缸将不再 占用转台所在的空间， 该平衡重装卸装置不再受移动式起重机的车架平面 空间和转台高度的限制， 不会影响转台的正常回转， 保证了移动式起重机 的工作性能； 该平衡重装卸装置将不会增加移动式起重机的整体尺寸， 使 得移动式起重机的整体尺寸不会超过道路行驶标准，整机的结构更加紧凑。 伸缩油缸也具有一定的重量， 将伸缩油虹设置在托盘内， 伸缩油缸还可起 到平衡重的作用， 从而使得转台的受力更加合理， 将提高移动式起重机的 稳定性； 托盘提升装置采用钢丝绳、 滑轮组的结构， 该托盘提升装置为柔 性连接， 现场操作筒便、 安全、 可靠。
本发明还提供了一种移动式起重机， 该移动式起重机具有上述的平衡 重装卸装置。 由于上述平衡重装卸装置具备上述技术效果， 具有该平衡重 装卸装置的移动式起重机也应具备相应的技术效果。 附图说明
图 1为本发明所提供的平衡重装卸装置的一种具体实施方式的立体结 构示意图；
图 2为本发明所提供的平衡重装卸装置的工作原理示意图；
图 3为图 2中的 A向截面示意图；
图 4为图 2的俯视结构示意图；
图 5为本发明提供的平衡重装卸装置处于起吊位置时的结构示意图； 图 6本发明提供的平衡重装卸装置处于工作位置时的结构示意图； 其中， 图 1-图 6中：
托盘 10、 第一伸缩油虹 11、 第二伸缩油虹 12、 第三伸缩油虹 13、 第 四伸缩油虹 14、 钢丝绳 21、 第一索节 21-1、 第二索节 21-2、 动滑轮 31、 定滑轮 41、 托盘固定件 51、 平衡重 61、 转台 70、 耳板 71、 固定销 72。 具体实施方式
本发明的核心是提供一种平衡重装卸装置， 该平衡重装卸装置的设置 位置更加合理， 可以使得移动式起重机的转台上有足够的空间、 结构更加 紧凑。 本发明的另一核心是提供一种移动式起重机。
下面结合附图对本发明的内容进行描述， 以下的描述仅是示范性和解 释性的， 不应对本发明的保护范围有任何的限制作用。
请参看图 1 , 图 1为本发明所提供的平衡重装卸装置的一种具体实施 方式的立体结构示意图。
如图 1所示，本发明提供的平衡重装卸装置，包括独立设置的托盘 10, 托盘 10两端的上端面用于放置平衡重 61 ,托盘 10的两端均具有沿托盘 10 长度方向延伸的空腔， 所述空腔内均设有数量不少于一个的伸缩油缸， 每 个伸缩油缸的固定端与托盘 10固定，每个伸缩油缸的伸缩端与用于提升托 盘 10的托盘提升机构连接。
在一种具体的实施方式中，托盘 10两端的每个空腔内均设有两个伸缩 油缸， 如图 1所示， 托盘 10—端的空腔内设有第一伸缩油缸 11、 第二伸 缩油虹 12, 另一端的空腔内设有第三伸缩油虹 13、 第四伸缩油虹 14, 第 一伸缩油缸 11、 第二伸缩油缸 12、 第三伸缩油缸 13、 第四伸缩油缸 14的 伸缩端均设置在托盘 10的端部方向上。 托盘 10两端的每个空腔内还可以 仅设置一个伸缩油缸， 本发明不对每个空腔内设置的伸缩油缸的数量做限 制。
第一伸缩油紅 11、 第二伸缩油紅 12、 第三伸缩油紅 13、 第四伸缩油 缸 14的伸缩端均连接有托盘提升机构， 以下以与第一伸缩油缸 11的伸缩 端连接的托盘提升机构为例对其进行筒单介绍。
在一种具体的实施方式中，与第一伸缩油缸 11的伸缩端连接的托盘提 升机构包括动滑轮 31、 定滑轮 41及绕于动滑轮 31和定滑轮 41上的钢丝 绳 21 , 动滑轮 31 固定在第一伸缩油缸 11的伸缩端， 动滑轮 31可随第一 伸缩油缸 11的伸缩端一起沿托盘 10长度方向往复移动，定滑轮 41固定在 托盘 10上， 钢丝绳 21的第一端至第二端依次绕于定滑轮 41、 动滑轮 31 上，且钢丝绳 21的第一端与移动式起重机的转台 70上设置的耳板 71可拆 卸连接， 钢丝绳 21的第二端固定在托盘 10上， 优选方案中， 为了方便钢 丝绳 21的第一端和第二端连接固定， 分别在钢丝绳 21的第一端和第二端 设置有第一索节 21-1和第二索节 21-2, 第一索节 21-1和第二索节 21-2均 可通过销接的方式分别与转台上的耳板、 托盘 10连接。
其中， 钢丝绳 21的绕向可参看图 2, 图 2为本发明所提供的平衡重装 卸装置的工作原理示意图。 如图 2所示， 钢丝绳 21 的第二端固定在托盘 10上， 钢丝绳 21依次绕过动滑轮 31、 定滑轮 41、 直至钢丝绳 21的第一 端， 可以理解， 第一伸缩油缸 11的伸缩量为 L时， 钢丝绳 21的移动量将 为 2L, 即托盘 10在竖直方向上的移动量也为 2L, 第一伸缩油缸 11以较 小的移动量便可使托盘 10提升较大的位移量。
优选方案中， 为了保证钢丝绳 21可以承受足够的强度， 可采用多根钢 丝绳， 钢丝绳 21的数量可根据需要进行设定。
与第二伸缩油紅 12、 第三伸缩油紅 13、 第四伸缩油紅 14的伸缩端分 别连接的托盘提升机构均和与第一伸缩油缸 11连接的托盘提升机构类似， 在此不再做详细介绍。
通过上述托盘提升机构可以将托盘 10及平衡重 61提升至所需高度， 为了将托盘 10与移动式起重机的转台 70固定， 优选方案中， 在托盘上设 置有托盘固定件 51 , 托盘固定件 51可以为具有销接孔的连接板， 相应地， 在移动式起重机的转台 70上设有与托盘固定件 51相配合的固定销 72, 固 定销 72可与托盘固定件 51以销接的方式固定连接。 进一步的方案中， 为 了保证托盘 10与移动式起重机的转台 70固定的稳固性，在托盘 10上对称 地设置四个托盘固定件 51 ,相应地，转台 70上同样对称地四个固定销 72。
以下介绍本发明提供的平衡重装卸装置的工作原理。
请参看图 2、 图 3、 图 4、 图 5、 图 6, 图 2为本发明所提供的平衡重 装卸装置的工作原理示意图， 图 3为图 2中的 A向截面示意图， 图 4为图 2的俯视结构示意图， 图 5为本发明提供的平衡重装卸装置处于起吊位置 时的结构示意图， 图 6本发明提供的平衡重装卸装置处于工作位置时的结 构示意图。
本发明提供的平衡重装卸装置安装平衡重方法如下： 移动式起重机就 位打好支腿，转台 70可以回转后，通过移动式起重机自身的起吊装置将托 盘 10起吊， 并将托盘 10放置在移动式起重机侧身的支腿之间的位置； 通 过移动式起重机自身起吊装置将所需的平衡重 61放置在托盘 10两端的上 端面上， 平衡重 61摆放整齐后， 回转转台 70, 使得转台 70的后端转至托 盘 10的正上方， 将钢丝绳 21的第一端的第一索节 21-1与转台 70上设置 的耳板 71连接； 驱动第一伸缩油虹 11、 第二伸缩油虹 12、 第三伸缩油虹 13、 第四伸缩油缸 14, 第一伸缩油缸 11、 第二伸缩油缸 12、 第三伸缩油 虹 13、 第四伸缩油虹 14的伸缩端均向托盘 10端部方向伸出， 各伸缩油虹 的伸缩端带动动滑轮 31向托盘 10端部方向移动，由于钢丝绳 21的第一端 与转台 70固定， 钢丝绳 21的第二端固定在托盘 10上， 动滑轮 31移动的 过程中， 钢丝绳 21绷紧， 在钢丝绳 21拉力的作用下， 托盘 21及放置在托 盘 21上的平衡重 61逐渐被提升； 托盘 21及平衡重 61被提升至所需位置 时， 托盘 21上设置的托盘固定装置 51与转台 70上设置的固定销 72固定 连接， 托盘 21及平衡重 61将被固定。 将托盘 21、 平衡重 61卸下的过程 与上述过程相反， 在此不再做详细介绍。
以下介绍本发明提供的平衡重装卸装置所具有的技术效果。
本发明提供的平衡重装卸装置， 在托盘 10内设置有沿托盘 10长度方 向延伸的空腔， 将提供提升动力的第一伸缩油缸 11、 第二伸缩油缸 12、 第 三伸缩油缸 13、 第四伸缩油缸 14设置在托盘 10内的空腔内， 各伸缩油缸 将不再占用转台 70所在的空间，该平衡重装卸装置不再受移动式起重机的 车架平面空间和转台高度的限制， 不会影响转台 70的正常回转，保证了移 动式起重机的工作性能； 该平衡重装卸装置将不会增加移动式起重机的整 体尺寸， 使得移动式起重机的整体尺寸不会超过道路行驶标准， 整机的结 构更加紧凑。
第一伸缩油缸 11、 第二伸缩油缸 12、 第三伸缩油缸 13、 第四伸缩油 缸 14也具有一定的重量， 将第一伸缩油缸 11、 第二伸缩油缸 12、 第三伸 缩油缸 13、 第四伸缩油虹 14设置在托盘 10内， 各伸缩油缸还可起到平衡 重的作用，从而使得转台 70的受力更加合理，有效地提高了移动式起重机 的稳定性。
托盘提升装置采用钢丝绳 21、 滑轮组的结构， 该托盘提升装置为柔性 连接， 现场操作筒便、 安全、 可靠。
以上实施例中的托盘提升机构仅是本发明提供的一种结构的托盘提升 机构， 本发明并不局限于此， 凡利用伸缩油缸的伸缩将托盘提升的托盘提 升机构均应在本发明的保护范围内， 例如仅采用一个定滑轮的结构。 以下对仅采用一个定滑轮的托盘提升机构进行筒单介绍。
与第一伸缩油缸 11 的伸缩端连接的托盘提升机构包括定滑轮及绕于 定滑轮的钢丝绳， 定滑轮的位置与上述实施例中的定滑轮 41的位置类似， 定滑轮固定在托盘 10上， 钢丝绳的第一端与移动式起重机的转台 70上设 置的耳板 71可拆卸连接， 钢丝绳的第二端固定在第一伸缩油缸 11的伸缩 端， 优选方案中， 为了方便钢丝绳的第一端和第二端连接固定， 分别在钢 丝绳的第一端和第二端设置有索节。
这种结构的托盘提升机构中，第一伸缩油缸 11的伸缩端的伸缩量为 L 时， 钢丝绳的移动量也为 L, 即托盘 10在竖直方向上的移动量也为 L。 其 余具体实施过程与上述实施例类似， 在此不再做详细介绍。
以上实施例中的托盘提升机构是由滑轮组和钢丝绳组成的， 本发明提 供的平衡重装卸装置并不局限于此， 托盘提升机构还可以由链轮组和链条 组成， 以下实施例将对此进行筒单介绍。
以下以与第一伸缩油缸 11 的伸缩端连接的托盘提升机构为例对其进 行筒单介绍。
在一种具体的实施方式中，与第一伸缩油缸 11的伸缩端连接的托盘提 升机构包括移动链轮、 固定链轮及绕于移动链轮和固定链轮上的链条， 移 动链轮固定在第一伸缩油缸 11 的伸缩端， 移动链轮可随第一伸缩油缸 11 的伸缩端一起沿托盘 10长度方向往复移动， 固定链轮固定在托盘 10上， 链条的第一端至第二端依次绕于固定链轮、 移动链轮上， 且链条的第一端 与移动式起重机的转台 70上设置的耳板 71可拆卸连接， 链条的第二端固 定在托盘 10上。
可以理解， 第一伸缩油缸 11的伸缩量为 L时，链条的移动量将为 2L, 即托盘 10在竖直方向上的移动量也为 2L,第一伸缩油缸 11以较小的移动 量便可使托盘 10提升较大的位移量。
其余具体实施过程与上述的实施例类似， 在此不再做详细介绍。
链轮组的结构并不局限与以上所述的一种结构， 凡利用伸缩油缸的伸 缩将托盘提升的托盘提升机构均应在本发明的保护范围内， 例如仅采用一 个固定链轮的结构。 以下对仅采用一个固定链轮的托盘提升机构进行筒单介绍。
与第一伸缩油缸 11 的伸缩端连接的托盘提升机构包括固定链轮及绕 于固定链轮的链绳， 固定链轮的位置与上述实施例中的固定链轮的位置类 似， 固定链轮固定在托盘 10上， 链绳的第一端与移动式起重机的转台 70 上设置的耳板 71可拆卸连接， 链绳的第二端固定在第一伸缩油缸 11的伸 缩端。这种结构的托盘提升机构中， 第一伸缩油缸 11的伸缩端的伸缩量为 L时， 链绳的移动量也为 L, 即托盘 10在竖直方向上的移动量也为 L。 其 余具体实施过程与上述实施例类似， 在此不再做详细介绍。
本发明还提供了一种移动式起重机， 该移动式起重机具有上述的平衡 重装卸装置。 由于上述平衡重装卸装置具备上述技术效果， 具有该平衡重 装卸装置的移动式起重机也应具备相应的技术效果，在此不再做详细介绍。
以上所述仅是本发明的优选实施方式， 应当指出， 对于本技术领域的 普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进、 润饰或变化， 比如， 切割环可以是相应管道的一部分， 也可以是单独设置 的具有较高耐磨性能的部件； 这些改进、 润饰或变化也应视为本发明的保 护范围。

Claims

权 利 要 求
1.一种平衡重装卸装置， 包括独立设置的托盘（10), 该托盘（10)两 端的上端面用于放置平衡重（61), 其特征在于， 所述托盘（10)的两端均 具有一个空腔， 所述空腔内均设置有数量不少于一个的伸缩油缸， 所述伸 缩油缸的固定端与托盘（10) 固定， 所述伸缩油缸的伸缩端与用于提升所 述托盘（10) 的托盘提升机构连接。
2.根据权利要求 1所述的平衡重装卸装置， 其特征在于， 所述托盘提 升机构包括定滑轮（ 41 )、 动滑轮（ 31 )及绕于所述定滑轮（ 41 )和所述动 滑轮（ 31 )上的钢丝绳（ 21 ), 所述动滑轮（ 31 ) 固定在所述伸缩油缸的伸 缩端， 所述定滑轮（41) 固定在所述托盘（10)上， 所述钢丝绳（21) 的 第一端至第二端依次绕于所述定滑轮（41)、 所述动滑轮（31), 且所述钢 丝绳（21) 的第一端与移动式起重机的转台 （70)上设置的耳板（71)可 拆卸连接， 所述钢丝绳（21) 的第二端固定在所述托盘 （10)上。
3.根据权利要求 1所述的平衡重装卸装置， 其特征在于， 所述托盘提 升机构包括定滑轮及绕于所述定滑轮上的钢丝绳， 所述定滑轮固定在所述 托盘（10)上， 所述钢丝绳的第一端与移动式起重机的转台 （70)上设置 的耳板（71)可拆卸连接， 所述钢丝绳的第二端固定在所述伸缩油缸的伸 缩端。
4.根据权利要求 1所述的平衡重装卸装置， 其特征在于， 所述托盘提 升机构包括固定链轮、 移动链轮及绕于所述固定链轮和所述移动链轮上的 链条， 所述移动链轮固定在所述伸缩油缸的伸缩端， 所述固定链轮固定在 所述托盘（10)上， 所述链条的第一端至第二端依次绕于所述固定链轮、 移动链轮， 且所述链条的第一端与移动式起重机的转台 （70)上设置的耳 板（71)可拆卸连接， 所述链条的第二端固定在所述托盘（10)上。
5.根据权利要求 1所述的平衡重装卸装置， 其特征在于， 所述托盘提 升机构包括固定链轮及绕于所述固定链轮上的链条， 所述固定链轮固定在 所述托盘（10)上， 所述链条的第一端与移动式起重机的转台 （70)上设 置的耳板（71)可拆卸连接， 所述链条的第二端固定在所述伸缩油缸的伸 缩端。
6.根据权利要求 1-5任一项所述的平衡重装卸装置， 其特征在于， 每 个所述空腔内的伸缩油缸的数量为一个或两个。
7.根据权利要求 6所述的平衡重装卸装置，其特征在于，所述托盘（ 10 ) 上还设有数量不少于一个的托盘固定件（51), 该托盘固定件（51)能与移 动式起重机的转台 （70)后端设置的固定销 (72)形成销接。
8.根据权利要求 7所述的平衡重装卸装置， 其特征在于， 所述托盘固 定件（51 ) 的数量为四个。
9.一种移动式起重机， 其特征在于， 包括权利要求 1-8任一项所述的 平衡重装卸装置。
10.根据权利要求 9所述的移动式起重机， 其特征在于， 该移动式起重 机的转台的后端设有数量不少于一个的固定销 ( 72 )。
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US8739989B2 (en) 2014-06-03
CN101643182A (zh) 2010-02-10
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AU2010285413A1 (en) 2012-03-29
EP2436639B1 (en) 2014-08-27

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