WO2012094894A1 - Appareil de commande séquentielle de mécanisme télescopique à plusieurs niveaux et équipement d'ingénierie comprenant ce dernier - Google Patents

Appareil de commande séquentielle de mécanisme télescopique à plusieurs niveaux et équipement d'ingénierie comprenant ce dernier Download PDF

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Publication number
WO2012094894A1
WO2012094894A1 PCT/CN2011/078663 CN2011078663W WO2012094894A1 WO 2012094894 A1 WO2012094894 A1 WO 2012094894A1 CN 2011078663 W CN2011078663 W CN 2011078663W WO 2012094894 A1 WO2012094894 A1 WO 2012094894A1
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WO
WIPO (PCT)
Prior art keywords
hydraulic cylinder
hydraulic
stage telescopic
control device
operating device
Prior art date
Application number
PCT/CN2011/078663
Other languages
English (en)
Chinese (zh)
Inventor
王佳茜
吴瀚晖
万梁
苏复兵
Original Assignee
长沙中联重工科技发展股份有限公司
湖南中联重科专用车有限责任公司
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Publication of WO2012094894A1 publication Critical patent/WO2012094894A1/fr

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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
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators

Definitions

  • the present invention relates to the field of hydraulic control, and in particular to a sequential control device for a multi-stage telescopic mechanism and an engineering device including the same.
  • Telescopic mechanisms such as concrete pump trucks, telescopic support legs for truck cranes, are often used in engineering equipment in the field of work transportation. Taking the concrete pump truck as an example, with the development of the pump truck, the length of the boom of the concrete pump truck is continuously increasing. To ensure the stability of the whole vehicle, it is necessary to expand the stable support area of the whole vehicle, which leads to the support legs. The span is constantly increasing.
  • the driving method of multi-stage telescopic legs mainly has the following several implementation modes: Solution 1: Drive with a single hydraulic cylinder; Option 2: Drive with two separate hydraulic cylinders; Option 3: Use a multi-stage hydraulic cylinder Drive 4:
  • the hybrid drive is driven by a hydraulic cylinder and a chain.
  • the motor drives the chain to drive the first-stage telescopic legs, and the other secondary telescopic legs are driven by hydraulic hydraulic cylinders.
  • the disadvantages of the above several multi-stage telescopic leg driving methods are as follows: In the first scheme, the length of the telescopic legs is limited, which cannot meet the support strength requirements of some models, and obviously cannot guarantee the sequential driving of the multi-stage telescopic legs; When driving for two-stage telescopic legs, if hydraulic pipes are connected in parallel, and each hydraulic cylinder drives one of the first-stage telescopic legs, each operating device corresponds to one leg driving operation.
  • a primary object of the present invention is to provide a control device for a new multi-stage telescopic mechanism and an engineering device therewith.
  • a multi-stage telescopic mechanism sequence control device comprising: a first operating device for conveying hydraulic fluid to a corresponding downstream component to control a downstream component Operating; a first hydraulic cylinder and a second hydraulic cylinder disposed downstream of the first operating device and coupled to the first operating device, wherein the first hydraulic cylinder and the second hydraulic cylinder are respectively coupled to two of the plurality of telescopic members Driving the two telescopic members separately; wherein the rodless cavity of the first hydraulic cylinder is in communication with the first port of the first operating device, and the rod cavity of the first hydraulic cylinder is in communication with the second port of the first operating device The rodless cavity of the first hydraulic cylinder communicates with the rodless cavity of the second hydraulic cylinder, and the rod cavity of the first hydraulic cylinder and the rod cavity of
  • the multi-stage telescopic mechanism sequential control device wherein the rodless chamber of the first hydraulic cylinder is directly in communication with the rodless chamber of the second hydraulic cylinder, and the rodless chamber of the first hydraulic cylinder is horizontally
  • the cross-sectional area is larger than the cross-sectional area of the rodless cavity of the second hydraulic cylinder.
  • the multi-stage telescopic mechanism sequential control device wherein the first-stage valve is disposed on the connecting line of the rodless chamber of the first hydraulic cylinder and the rodless chamber of the second hydraulic cylinder.
  • the multi-stage telescopic mechanism sequence control device according to the first aspect of the present invention, wherein the sequence control device further comprises: a hydraulic motor, and another telescopic member other than the two telescopic members of the multi-stage telescopic mechanism Connected to drive another telescopic member; a second operating device is coupled to the hydraulic motor to deliver hydraulic fluid to the hydraulic motor in accordance with an operational command to control operation of the hydraulic motor.
  • the multi-stage telescopic mechanism sequence control device further includes: a hydraulic motor connected to another telescopic member of the multi-stage telescopic mechanism except the two telescopic members, Driving another telescopic member; wherein: one end of the hydraulic motor is connected to the first end of the first operating device, and the other end of the hydraulic motor is connected to the second end of the first operating device through the second sequence valve; wherein, the first hydraulic cylinder The rodless chamber is connected to the first end of the first operating device via a third sequence valve.
  • the opening pressure of the second sequence valve is smaller than the opening pressure of the third sequence valve.
  • the multi-stage telescopic mechanism sequential control device wherein the first hydraulic lock is disposed between the first operating device and the first hydraulic cylinder.
  • the multi-stage telescopic mechanism sequential control device wherein the second hydraulic lock is disposed between the second operating device and the hydraulic motor.
  • the first hydraulic lock is disposed between the first operating device and the first hydraulic cylinder and the hydraulic motor.
  • the multistage telescopic mechanism sequential control device wherein the first hydraulic cylinder and the second hydraulic cylinder are reversely mounted, wherein the respective cylinders of the first hydraulic cylinder and the second hydraulic cylinder are fixed together
  • the piston rods of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected to the two telescopic members.
  • an engineering apparatus comprising a multi-stage telescopic mechanism and a multi-stage telescopic mechanism sequence control device according to the first aspect of the present invention, wherein the multi-stage telescopic mechanism is coupled to a chassis of the engineering equipment, The sequence control device is coupled to the multi-stage telescopic mechanism to control the sequential operation of the multi-stage telescopic mechanism.
  • the present invention has the following technical effects:
  • the multi-stage telescopic mechanism sequential control device of the present invention sets the cross-sectional ratio between the rod cavity and the rodless cavity of two connected hydraulic cylinders, so that between the two hydraulic cylinders during operation There is a difference in force, thereby causing the two hydraulic cylinders to sequentially operate, thereby achieving sequential control of the telescopic members.
  • FIG. 1 is a schematic diagram of a hydraulic circuit of a first embodiment of a sequential control device according to the present invention
  • FIG. 2 is a schematic diagram of a hydraulic circuit of a second embodiment of a sequential control device according to the present invention
  • Figure 3 is a schematic diagram showing a hydraulic circuit of a third embodiment of a sequential control device according to the present invention
  • Figure 4 is a schematic view showing a hydraulic circuit of a fourth embodiment of a sequential control device according to the present invention
  • Fig. 6 is a schematic diagram of a hydraulic circuit of a sixth embodiment of a sequential control device according to the present invention.
  • Figure 7 shows a schematic view of the application of a sequential control device according to the present invention to a multi-stage telescopic member of a concrete pump truck.
  • the multi-stage telescopic mechanism sequential control device comprises: a first operating device (generally, the first operating device may be a universal hydraulic reversing valve, and the latter second operating device is also similar) 11, which is used according to an operator
  • the given operational command delivers hydraulic fluid to the respective downstream component to control operation of the downstream component; a first hydraulic cylinder 21 and a second hydraulic cylinder 22 disposed downstream of the first operating device 11 and coupled to the first operating device 11
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are respectively connected to two of the telescopic members of the multi-stage telescopic mechanism to respectively drive the two telescopic members to perform a telescopic movement.
  • the rodless chamber 21a of the first hydraulic cylinder 21 communicates with the first port 11a of the first operating device 11, and the rod chamber 21b of the first hydraulic cylinder 21 communicates with the second port lib of the first operating device 11.
  • the first operating device 11 can deliver hydraulic fluid to the rodless chamber 21a of the first hydraulic cylinder 21 downstream through its first port 11a, and has a rod to the downstream first hydraulic cylinder 11 through the second port 1 ib
  • the chamber 21b delivers hydraulic fluid.
  • the rodless chamber 21a of the first hydraulic cylinder 21 communicates with the rodless chamber 22a of the second hydraulic cylinder 22, and the rod chamber 21b of the first hydraulic cylinder 21 and the rod chamber 22b of the second hydraulic cylinder 22 communicate with each other.
  • the hydraulic fluid delivered from the first operating device 11 to the rodless chamber 21a of the first hydraulic cylinder 21 sequentially flows into the rodless chamber 22a of the second hydraulic cylinder 22, and is delivered to the rod chamber 21b of the first hydraulic cylinder 21.
  • Hydraulic fluid will flow into the first
  • the second hydraulic cylinder 22 has a rod cavity 22b. Further, the cross-sectional area of the rod chamber 21b of the first hydraulic cylinder 21 is made smaller than the cross-sectional area of the rod chamber 22b of the second hydraulic cylinder 22.
  • the above-described multi-stage telescopic mechanism sequential control device controls the working order of the hydraulic cylinders by changing the cross-sectional area of the rod-cavity of the driving hydraulic cylinder to control the working order of the hydraulic cylinders, thereby controlling the operation sequence of the telescopic members.
  • the rigidity of the larger first-stage telescopic member is greater than that of the smaller second-stage telescopic member. In order to ensure stable and safe operation, it is necessary to ensure the piston of the first hydraulic cylinder 21 during the telescopic movement.
  • the rod 21c is first extended and then retracted, and the piston rod 22c of the second hydraulic cylinder 22 is retracted and then retracted. That is, when the telescopic mechanism is extended, the piston rod 21c of the first hydraulic cylinder 21 is extended before the piston rod 22c of the second hydraulic cylinder 22; when the telescopic mechanism is retracted, the piston of the second hydraulic cylinder 22 is made The rod 22c is retracted prior to the piston rod 21c of the first hydraulic cylinder 21.
  • the cross-section of the rod chamber and the rodless chamber of the two hydraulic cylinders The areas are designed to be different from each other.
  • the cross-sectional area of the rod chamber 21b of the first hydraulic cylinder 21 is smaller than the cross-sectional area of the rod chamber 22b of the second hydraulic cylinder 22, while the cross-sectional area of the rodless chamber 21a of the first hydraulic cylinder 21 is larger than The cross-sectional area of the rodless chamber 22a of the second hydraulic cylinder 22, thereby causing a force difference between the two hydraulic cylinders when the telescopic member is extended and retracted (which will be described in detail below in conjunction with specific examples), The force difference realizes the sequential operation of the first hydraulic cylinder 21 and the second hydraulic cylinder 22, thereby causing the linear expansion of the telescopic members respectively connected to the two hydraulic cylinders.
  • the above sequential control device of the present invention can be applied to a secondary, tertiary or even more class of telescopic mechanisms.
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 may be respectively coupled to the first stage telescopic member and the second stage telescopic member Connected (the first stage telescopic member is generally the larger one of the telescopic members), whereby the first hydraulic cylinder 21 first drives the first stage telescopic member to move, and then the second hydraulic cylinder 22 drives the second stage telescopic member to move, thereby Realize the sequential action of the secondary telescopic mechanism.
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 may be respectively connected to the first-stage telescopic member and the second-stage telescopic member, or may be respectively the second-stage telescopic member and the third-stage telescopic member. Connected, or may be connected to the first-stage telescopic member and the third-stage telescopic member, respectively, to achieve the sequential action of the telescopic member.
  • the telescopic members can be controlled by a motor-driven chain transmission and are manually controlled to cooperate with the double hydraulic cylinders to realize the three telescopic members.
  • FIG. 1 there is shown a hydraulic circuit schematic of a first embodiment of a multi-stage telescopic mechanism sequence control device in accordance with the present invention.
  • the rodless chamber 21a of the first hydraulic cylinder 21 and the rodless chamber 22a of the second hydraulic cylinder 22, the rod chamber 21b and the second hydraulic cylinder 22 of the first hydraulic cylinder 21 are provided.
  • the rod chambers 22b are all directly connected through respective infusion lines, and the hydraulic lines are relatively simple.
  • the first hydraulic cylinder 21 is also absent.
  • the cross-sectional area of the rod cavity 21a is designed to be larger than the cross-sectional area of the rodless cavity 22a of the second hydraulic cylinder 22.
  • the operator operates the first hydraulic cylinder 21 and the second hydraulic cylinder 22 through the first operating device 11 to realize the extension and contraction movement of the respective stages of the telescopic members.
  • the hydraulic lock 31 is connected in series to the hydraulic line between the first operating device 11 and the two hydraulic cylinders 21 and 22.
  • the hydraulic lock 31 is composed of two hydraulically controlled check valves, which are usually used in the oil passage of a load-bearing hydraulic cylinder or motor to prevent the hydraulic cylinder or motor from sliding or running under the action of a large load. .
  • the hydraulic lock 31 in Figs. 1 and 2 is mainly used to prevent a safety accident caused by an external force generated by the telescopic member in a stationary state.
  • the operation mode of the sequence control device shown in FIG. 1 will be described by taking a control of the secondary expansion mechanism as an example.
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are respectively used to drive the first stage telescopic members (larger telescopic members) and the second stage telescopic members (smaller telescopic members).
  • the cross-sectional areas of the rodless chamber 21a of the first hydraulic cylinder 21 and the rod chamber 21b are respectively indicated as ⁇ . ⁇ 1 , .
  • the cross-sectional areas of the rodless chamber 22a of the second hydraulic cylinder 22 and the rod chamber 22b are respectively indicated. " 2.
  • the cross-sectional area of the rodless cavity and the rod cavity of the first hydraulic cylinder 21 and the second hydraulic cylinder 22 has the following relationship: (1) ⁇ S rod2 (2)
  • hydraulic fluid enters the rodless chamber 21a of the first hydraulic cylinder 21 from the first port 11a of the first operating device 11 through the first hydraulic lock 3, while the hydraulic fluid passes through the rodless chamber 21a,
  • the connecting line between 22a enters the rodless chamber 22a from the rodless chamber 21a.
  • the oil inlet pressure of the hydraulic system ie, the pressure in the rodless chamber
  • the oil return pressure ie, the rod chamber pressure
  • the force Fi on the first stage telescopic member and the force F 2 acting on the second stage telescopic member of the second hydraulic cylinder 22 are: - P ⁇ S. P()S r .
  • the sequential extension and retraction of the secondary telescopic members can be achieved.
  • the two hydraulic cylinders are connected by a simple pipe, and the sequential operation of the telescopic members is realized by setting the cross-sectional areas of the rod chambers and the rodless chambers of the first hydraulic cylinder 21 and the second hydraulic cylinder.
  • the structural resistance of the first-stage telescopic member and the second-stage telescopic member encountered during the extension and retraction of the telescopic member is not completely the same, in order to ensure The realization of sequential actions and improved operational safety, as much as possible to increase the cross-sectional area difference between the rodless cavity and the rod cavity.
  • the present invention further provides a second embodiment, which will be described in detail below with reference to FIG.
  • the rod chambers 21b, 22b of the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are directly communicated through the connecting line, and the rodless chamber 21a of the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are not.
  • a first sequence valve 41 is disposed on the connecting line of the rod chamber 22a.
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are designed such that the cross-sectional areas of their respective rod- shaped cavities 21b, 22b satisfy the following relationship: ⁇ S rod2 (9)
  • the first hydraulic cylinder 21 drives the first-stage telescopic member to extend.
  • the first hydraulic cylinder 21 has no rod.
  • the pressure in the chamber 21a rises.
  • the first sequence valve 41 is opened, and the hydraulic fluid enters the second hydraulic pressure from the rodless chamber 21a of the first hydraulic cylinder 21 through the first sequence valve 41.
  • the rodless chamber 22a of the cylinder 22 drives the second stage telescopic member to extend.
  • the sequential extension of the telescopic members can be realized, thereby avoiding the requirement of the cross-sectional area of the rodless cavity of the first hydraulic cylinder 21 and the second hydraulic cylinder 22, and the design of the hydraulic cylinder can be made more reasonable. , and the sequential movement is more secure.
  • the hydraulic fluid enters the rod chamber 21b of the first hydraulic cylinder 21 through the hydraulic lock 3 through the second port lib of the first operating device 11.
  • the general return pressure is ⁇ . ' () , then from equation (8), A 'mainly.
  • the second-stage telescopic member can be retracted first, and the first-stage telescopic member can be retracted in the sequential operation.
  • the hydraulic cylinder it is only necessary to design the hydraulic cylinder to have a cross-sectional difference between the rod cavities, so that the strength and rigidity of the hydraulic cylinder are better than that of the first embodiment, and the operation safety of the system is safe. The sex is also higher, and the effect of sequential control is better.
  • the first embodiment and the second embodiment described above can be directly used to realize the sequential control requirements of the two-stage telescopic member, that is, the first-stage telescopic member (generally the first-stage telescopic member) having a large rigidity is first extended and then retracted.
  • the first-stage telescopic member (generally the second-stage telescopic member) having a small rigidity is extended and then retracted.
  • the requirements for the span of the telescopic members are increasing. Due to the limitation of the body width, the two-stage telescopic members may not meet the requirements. It is necessary to use three or more telescopic members. The following describes the first embodiment and the above.
  • a sequence control device for a three-stage telescopic member for the sequential control of the three-stage telescopic mechanism, the hydraulic cylinder group shown in the first embodiment and the second embodiment is used to drive the two-stage telescopic members therein, for example, the first and second-stage telescopic members or the second and third stages.
  • the telescopic member, the first-stage telescopic member is driven by the chain transmission mode, that is, the motor 50 drives the chain transmission mechanism to realize the movement of the telescopic member.
  • the sequential control method of the three-stage expansion mechanism will be described by taking the first stage expansion and contraction member of the three-stage telescopic mechanism driven by the motor 50 and the second and third-stage expansion and contraction members of the hydraulic cylinder group as an example.
  • the first-stage telescopic member (the first-stage telescopic member closest to the vehicle body when extended is defined as the first-stage telescopic leg) has the greatest rigidity, the second and third.
  • the order of action of the three-stage telescopic members is: one to two to three when extended, and three to two ⁇ one for retraction.
  • the operation sequence of the second and third-stage telescopic members can be realized by the hydraulic cylinder group in the first embodiment or the second embodiment, and the following four implementation manners can be implemented for the operation requirements of the first-stage telescopic members.
  • the following is described in conjunction with FIGS. 3, 4, 5, and 6.
  • the embodiments shown in Figures 3 and 4 are constructed based on the embodiments shown in Figures 1 and 2, respectively, wherein the embodiments of Figures 3 and 4 are sequentially controlled in Figures 1 and 2, respectively.
  • a hydraulic motor 50 and a second operating device 12 for controlling a third telescopic member (here, a first-stage telescopic member) are added to the device. As shown in FIGS.
  • the hydraulic motor 50 is connected to the first stage telescopic member of the three telescopic mechanisms, and the second operating device 12 is passed through a separate hydraulic line and hydraulic motor 50. Connected to deliver hydraulic fluid to the hydraulic motor 50 in accordance with an operator's operational command to control operation of the hydraulic motor 50.
  • the embodiments shown in Figures 5 and 6 are also constructed based on the embodiments shown in Figures 1 and 2, respectively, wherein the embodiments of Figures 5 and 6 are in the order of Figures 1 and 2, respectively.
  • the motor 50 for controlling the first stage telescopic member is added to the control device, but no additional second operating device is added, but the common first operating device 11 is used together with the hydraulic cylinder group to drive the motor 50 and the hydraulic pressure.
  • the cylinder groups 21, 22 are controlled. As shown in FIGS. 5 and 6, in the fifth and sixth embodiments, one end 50a of the hydraulic motor 50 is connected to the first end 11a of the first operating device 11, and the other end 50b of the hydraulic motor 50 is passed through the second sequence valve. 42 is connected to the second end 1 ib of the first operating device 11; and, the rodless chamber 21a of the first hydraulic cylinder 21 is connected to the first end 11a of the first operating device 11 via a third sequence valve 43. Referring first to the third and fourth embodiments shown in Figures 3 and 4, wherein the hydraulic cylinder groups 21, 22 and the motor 50 are controlled by separate first operating devices 11 and second operating devices 21 and corresponding hydraulic lines, respectively. .
  • a second hydraulic lock 12 is provided between the motor 50 and the second operating device 12.
  • the operator first drives the motor 50 through the second operating device 12, and the motor 50 drives the sprocket and chain (not shown) connected to the first-stage telescopic member to move.
  • the first stage telescopic member projects.
  • the hydraulic cylinder groups 21, 22 are driven by the first operating device 11 to sequentially extend the second and third stage telescopic members; when the three-stage telescopic members are sequentially retracted, the operator is first driven by the first operating device 11.
  • the hydraulic cylinder groups 21, 22 sequentially retract the third and second stage telescopic members; and then, the second operating device 12 drives the motor 50 to retract the first stage telescopic members. Thereby, the sequential extension and retraction of the three-stage telescopic members is achieved.
  • the sequential operation modes of the second and third stage telescopic members are as described in the first and second embodiments above, and are not described herein. Referring next to the fifth and sixth embodiments shown in Figures 5 and 6, wherein the hydraulic cylinder sets 21, 22 and the motor 50 are operated using a common first operating device 11 and corresponding hydraulic lines, but as described above The second sequence valve 42 and the third sequence valve 43 are added to the hydraulic line.
  • the operator When the three-stage telescopic members are sequentially extended, the operator first operates the first operating device 11 such that the first port 11a delivers hydraulic fluid downstream, due to the rodless chamber 21a of the first hydraulic cylinder 21 and the first port 11a A second sequence valve 42 is provided therebetween so that hydraulic fluid will first enter the motor 50.
  • the motor 50 is driven to drive the chain to drive the first stage telescopic member out.
  • the first stage telescopic member is fully extended and then reaches the limiting device (not shown), the pressure in the hydraulic system rises.
  • the third sequence valve 43 When the set opening pressure of the third sequence valve 43 is reached, the third sequence valve 43 is opened, the hydraulic pressure Only the third sequence valve 43 of the fluid enters the rodless chamber 21a of the first hydraulic cylinder 21, thereby driving the hydraulic cylinder groups 21, 22, thereby sequentially extending the second and third stage telescopic members.
  • the operator When the three-stage telescopic members are sequentially retracted, the operator first operates the first operating device 11 such that the second port 1 ib delivers hydraulic fluid downstream, since the second sequence is set between the hydraulic motor 50 and the second port l ib The valve 42, thus the hydraulic fluid first drives the hydraulic cylinder groups 21, 22, thereby sequentially retracting the third and second stage telescopic members.
  • the opening pressures of all sequence valves can be set according to the sequence of sequential valve actions in a particular embodiment.
  • the general principle is that the sequence valves associated with prior actions (eg, first extended and then retracted), Its set opening pressure is relatively small.
  • the opening pressure of the second sequence valve 42 is smaller than the opening pressure of the third sequence valve 43, so that the second sequence valve 42 operates before the third sequence valve 43 to Better guarantee the sequential action of the telescopic mechanism.
  • the embodiments of FIGS. 3 to 6 are capable of realizing the sequential operation of the three-stage telescopic members, but the hydraulic hoses of the embodiments of FIGS. 3 and 4 are relatively more than the embodiments of FIGS. 5 and 6. Complex, but the embodiments of Figures 5 and 6 have higher performance requirements for hydraulic components such as motors and sequence valves.
  • the chain transmission mechanism can be used to control the first-stage telescopic members, and the chain transmission mechanism can also be used to control the other-stage telescopic members.
  • a hydraulic cylinder block is used to control two adjacent telescoping mechanisms that are nested one another.
  • the hydraulic motor 50 and the second operating device 12 are used to control the third stage telescopic member, and the hydraulic cylinder is used.
  • the groups 21, 22 and the first operating device 11 control the first stage telescopic member and the second stage telescopic member; in the embodiment of Figs.
  • the third stage telescopic member is controlled by the hydraulic motor 50, at this time, It is necessary to change the set opening pressure of the second sequence valve 42 and the corresponding connection mode of the hydraulic motor 50.
  • the application of the sequential control device for the three-stage telescopic member on the concrete pump truck is as shown in Fig. 7, in which the state in which the three telescopic members are both extended.
  • the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are mounted opposite to each other, and in the illustrated example, are mounted on the second stage telescopic member 3.
  • the respective cylinders of the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are fixed together, and the respective piston rods of the first hydraulic cylinder 21 and the second hydraulic cylinder 22 are respectively coupled to the two telescopic members (shown in FIG. 7 The second stage telescopic member 3 and the third stage telescopic member 4) are connected.
  • the driven sprocket 6 and the drive sprocket 7 are both mounted on the base member 1, wound around the driven sprocket 6 and the drive sprocket 7
  • a section of the upper chain 8 is fixedly coupled to the first stage telescopic member 2, thereby connecting the first stage telescopic member 2 and the base member 1.
  • the chain transmission mechanism passes the first stage telescopic member 2 through the driven sprocket 7 mounted on the first stage telescopic member 2 and the drive sprocket 6 mounted on the base leg 1 of the telescopic mechanism. It is connected to the base member 1.
  • the motor 50 is shown in Fig. 7, which is mounted outside the base member 1, and is coupled to the drive sprocket 7 via a rotating shaft, whereby the drive sprocket 6 can be rotated.
  • a hydraulic cylinder including two or more hydraulic cylinders can be used accordingly.
  • connection mode of the hydraulic cylinders can be referred to the above embodiment.
  • sequence valve for the opening sequence control, by appropriately setting the opening of the sequence valve Pressure can achieve sequential control of the hydraulic cylinder.
  • the multi-stage telescopic mechanism sequential control device realizes sequential control of the multi-stage telescopic mechanism by rationally designing the internal size of the hydraulic cylinder and the connection manner of the hydraulic cylinder; and, in the sequential control device of the present invention, two hydraulic pressures
  • the cylinder adopts a common control operating device and an infusion line, which simplifies the pipeline connection; meanwhile, the sequential control device of the present invention overcomes the insufficient driving force caused by the use of the multi-stage hydraulic cylinder in the prior art, and the telescopic member is stuck. .
  • the principle of the sequential control of the telescopic mechanism of the present invention can be used alone, that is, the sequential control can be realized by separately designing the cross-sectional area ratio between the rod chamber and the rodless chamber of the hydraulic cylinder;
  • the sequential valve arrangement can also be used alone to achieve sequential control. What is described in this specification is a combination Control mode, but it will be apparent that those skilled in the art can readily conceive the above described sequential control scheme in accordance with the principles of the present invention.
  • the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un appareil de commande séquentielle de mécanisme télescopique à plusieurs niveaux comprenant : un premier appareil d'exploitation (11), destiné à être utilisé pour le transfert d'un fluide hydraulique vers un composant en aval pour commander le fonctionnement du composant en aval, un premier vérin hydraulique (21) et un second vérin hydraulique (22), disposés en aval par rapport au premier appareil d'exploitation (11) et connectés au premier appareil d'exploitation (11). Le premier vérin hydraulique (21) et le second vérin hydraulique (22) sont respectivement connectés à deux composants télescopiques du mécanisme télescopique à plusieurs niveaux pour entraîner respectivement les deux composants télescopiques. Une chambre dépourvue de tringlerie (21a) du premier vérin hydraulique (21) est connectée à un premier orifice (11a) du premier appareil d'exploitation (11) ; une chambre comportant une tringlerie (21b) du premier vérin hydraulique (21) est connectée à un second orifice (11b) du premier appareil d'exploitation (11) ; la chambre dépourvue de tringlerie (21a) du premier vérin hydraulique (21) est connectée à une chambre dépourvue de tringlerie (22a) du second vérin hydraulique (22) ; la chambre comportant une tringlerie (21b) du premier vérin hydraulique (21) est connectée à une chambre comportant une tringlerie (22b) du second vérin hydraulique (22). L'aire en coupe transversale (Srod1) de la chambre comportant une tringlerie (21b) du premier vérin hydraulique (21) est plus petite que l'aire en coupe transversale (Srod2) de la chambre comportant une tringlerie (22b) du second vérin hydraulique (22).
PCT/CN2011/078663 2011-01-13 2011-08-19 Appareil de commande séquentielle de mécanisme télescopique à plusieurs niveaux et équipement d'ingénierie comprenant ce dernier WO2012094894A1 (fr)

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CN201110007297.0 2011-01-13

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CN102085851B (zh) * 2011-01-13 2013-06-05 中联重科股份有限公司 多级伸缩机构顺序控制装置及包括该装置的工程设备
CN105889175A (zh) * 2014-12-20 2016-08-24 卞康群 联动式液压缸
CN105179367A (zh) * 2015-10-13 2015-12-23 姚运文 无顺序阀自动顺序动作多级液压油缸
CN108249324B (zh) * 2017-12-12 2019-06-14 湖南百特随车起重机有限公司 一种起重机臂的顺序伸缩机构
CN112537279B (zh) * 2020-12-14 2022-12-16 安徽博微长安电子有限公司 一种大吨位载车平台的液压调平支撑腿撤收系统及撤收方法
CN115477239B (zh) * 2022-07-04 2023-04-04 韶关市起重机厂有限责任公司 一种电控实现的起重机顺序伸缩系统

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