WO2022246655A1 - Vérin hydraulique - Google Patents

Vérin hydraulique Download PDF

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Publication number
WO2022246655A1
WO2022246655A1 PCT/CN2021/095857 CN2021095857W WO2022246655A1 WO 2022246655 A1 WO2022246655 A1 WO 2022246655A1 CN 2021095857 W CN2021095857 W CN 2021095857W WO 2022246655 A1 WO2022246655 A1 WO 2022246655A1
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WO
WIPO (PCT)
Prior art keywords
oil
hydraulic
cylinder
chamber
passage
Prior art date
Application number
PCT/CN2021/095857
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English (en)
Chinese (zh)
Inventor
詹勇勇
杜新法
王松峰
阮彬豪
Original Assignee
杭州天铭科技股份有限公司
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 杭州天铭科技股份有限公司 filed Critical 杭州天铭科技股份有限公司
Priority to PCT/CN2021/095857 priority Critical patent/WO2022246655A1/fr
Publication of WO2022246655A1 publication Critical patent/WO2022246655A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/26—Adaptations or arrangements of pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/36—Load-engaging elements

Definitions

  • the present application relates to the field of mechanical equipment, in particular to a hydraulic jack.
  • the hydraulic jack in the related art is to convert the oil in the two areas of the jack to drive the telescopic rod to move back and forth, and realize the function of the jack through the one-way valve and the cross-sectional difference.
  • hydraulic jacks can lift heavy objects only by pressing down on a single piston.
  • the piston only has a lifting stroke when it presses down on a heavy object, and there is no lifting stroke when the piston lifts up.
  • the support block of the jack is fixed. If the heavy object is too far away from the support block, the jack will not support the heavy object or most of the lifting stroke will be wasted on the empty stroke.
  • the embodiment of the application proposes a hydraulic jack, including an outer oil cylinder, the outer wall of the outer oil cylinder is provided with a bearing assembly for carrying or pulling heavy objects, and the outer wall of the outer oil cylinder has a plurality of fixed positions , the bearing assembly can be fixed at any one of the fixed positions, and can move between any two of the fixed positions.
  • the hydraulic jack of the embodiment of the present application can adjust the position of the bearing assembly on the outer oil cylinder, so that the lifting or pulling operation can be carried out quickly, the distance of the empty stroke is reduced, and the adaptability is better.
  • each of the fixed positions is provided with a card slot
  • the bearing assembly includes: a slider, a latch and a jacking block
  • the slider is sheathed on the outer wall of the outer oil barrel and can move relative to the outer oil barrel.
  • a bolt installation groove is opened on the slider, and the bolt is hinged to the bolt installation groove.
  • the bolt having an open state and a locked state, and being switchable between said open state and said locked state;
  • the slider In the open state, the slider can move relative to the outer oil cylinder;
  • part of the structure of the bolt is located in the installation groove of the bolt, and part of the structure is located in the groove, so that the slider is fixed relative to the outer oil cylinder;
  • the top block is installed on the slider and can move with the slider.
  • the slider is provided with an elastic push assembly
  • the latch is provided with a groove, and when the latch is in the locked state, the elastic push assembly pushes against the groove.
  • the elastic pushing assembly includes screws, springs and push balls
  • the slider is provided with installation through holes, and the screws, springs and push balls are arranged in the installation through holes.
  • the spring is compressed between the screw and the top ball, and a part of the top ball can leak out from the end of the installation through hole to abut against the groove.
  • the jacking block is detachably connected to the sliding block, or the jacking block and the sliding block are integrally formed.
  • the slider is provided with an insertion slot, and the insertion slot includes a first guide portion and a limiting portion;
  • the top block has an insertion part, and the insertion part includes a second guide part and a limit block;
  • the insertion part can be inserted into the insertion slot, and the second guide part is matched with the first guide part, and the limit block is matched with the limit part.
  • the number of the bolts is two, and two bolt installation grooves are opened on the slider, each of the bolt installation grooves is hinged to one of the bolts;
  • the two pins are symmetrical about the central axis of the outer oil cylinder.
  • the hydraulic jack further includes an inner oil cylinder, a hydraulic cylinder body, and a piston rod;
  • the outer oil cylinder is sleeved outside the inner oil cylinder and can move relative to the inner oil cylinder, and the outer oil cylinder and the inner oil cylinder define a reserve oil chamber;
  • the hydraulic cylinder block is arranged in the inner oil cylinder and can move along the axial seal of the inner oil cylinder.
  • the two ends of the hydraulic cylinder block are respectively the load oil chamber and the reserve oil chamber;
  • a piston is arranged in the hydraulic cylinder body, and the piston divides the hydraulic cylinder body into a first hydraulic oil chamber and a second hydraulic oil chamber, the first hydraulic oil chamber has a first oil port, and the second hydraulic oil chamber
  • the cavity has a second oil port; both the first oil port and the second oil port are in one-way communication with the load oil chamber, and both the first oil port and the second oil port can be connected to the load oil chamber.
  • the load oil chamber is in one-way communication; the first oil port and the second oil port are in one-way communication with the reserve oil chamber, and the reserve oil chamber can flow to the first oil port and the One-way circulation of the second oil port;
  • the hydraulic cylinder block has an oil unloading pipeline, the oil unloading pipeline communicates with the load oil chamber and the reserve oil chamber, and an oil unloading switch is arranged on the oil unloading pipeline;
  • a handle is hinged on the outer oil cylinder, one end of the piston rod is connected to the piston, and the other end is connected to the handle, so that the handle can drive the piston to reciprocate through the piston rod to change The volume of the first hydraulic oil chamber and the second hydraulic oil chamber, so that one of the first oil port and the second oil port delivers hydraulic oil to the load oil chamber, while the other Suction oil from the reserve oil chamber.
  • the outer oil cylinder is provided with an oil cylinder cover, and the oil cylinder cover is sealed and arranged on the top of the outer oil cylinder, the handle is hinged to the oil cylinder cover, and the piston A rod passes through the oil tank cover and is hinged to the handle.
  • the outer oil cylinder is provided with a sleeve, the sleeve is fixedly connected to the bottom of the outer oil cylinder, the sleeve is sleeved outside the inner oil cylinder, and can sealingly slides along the outer wall of the inner oil cylinder.
  • At least a partial area of the inner wall of the sleeve is provided with a bushing, the bushing is coaxially arranged with the sleeve and fixed relative to the sleeve, and the sleeve sleeve on the outer wall of the inner oil cylinder, and can move relative to the axial direction of the inner oil cylinder.
  • the bottom of the inner oil cylinder is provided with a base sealing body, and the base sealing body seals the bottom of the inner oil cylinder;
  • the top of the inner oil cylinder is located under the oil cylinder cover and is open in the inner cavity of the outer oil cylinder.
  • the sealing body of the base is connected to the base, and the outer wall of the inner oil cylinder is provided with a limiting member, and the limiting member is used to limit the movement range of the outer oil cylinder, and the limiting member The component is located at the upper middle of the inner oil cylinder.
  • the hydraulic cylinder includes: an oil passage main body, an oil passage cover, and an oil passage lower cover;
  • the outer wall of the oil passage main body is in sealing contact with the inner wall of the inner oil barrel, and enables the oil passage main body to move axially relative to the inner oil barrel;
  • a hydraulic oil chamber penetrating through the oil passage body is formed in the oil passage main body, the piston is arranged in the hydraulic oil chamber, and divides the hydraulic oil chamber into the first hydraulic oil chamber and the second hydraulic oil chamber.
  • the oil unloading pipeline is formed on the main body of the oil passage;
  • the oil upper cover is sealed on the upper end of the hydraulic oil cavity
  • the oil lower cover is sealed on the lower end of the hydraulic oil cavity
  • the piston rod is connected to the piston through the oil upper cover.
  • the first oil port communicates with the reserve oil chamber through the first oil inlet passage, and communicates with the load oil chamber through the first oil outlet passage, and the first oil inlet
  • a first one-way valve is set on the road, and a second one-way valve is set on the first oil outlet line;
  • the second oil port communicates with the reserve oil chamber through the second oil inlet, and communicates with the load oil chamber through the second oil outlet.
  • a third check valve is arranged on the second oil inlet.
  • a fourth one-way valve is arranged on the second oil outlet.
  • the first oil inlet passage is formed on the oil passage cover
  • the first oil outlet passage and the second oil inlet passage are both formed on the oil passage main body
  • the The second oil outlet passage is formed on the lower cover of the oil passage.
  • the upper end of the oil passage main body is formed with a first sinker
  • the lower end of the oil passage main body is formed with a second sinker
  • at least part of the structure of the oil passage cover is arranged on the In the first sinker
  • at least part of the structure of the lower cover of the oil passage is arranged in the second sinker
  • the inlet of the first oil outlet is located in the first sinker, and the outlet of the second oil inlet is located in the second sinker.
  • an oil discharge rod is arranged in the inner oil cylinder, one end of the oil discharge rod is arranged on the oil discharge pipeline, and the other end passes through the oil cylinder cover and is connected to the oil discharge pipe.
  • the oil discharge handle is hinged to the oil tank cover, and can control the connection and closure of the oil discharge pipeline through the oil discharge rod.
  • a first overload protection oil circuit is connected between the first hydraulic oil chamber and the reserve oil chamber,
  • a second overload protection oil circuit is connected between the second hydraulic oil chamber and the reserve oil chamber.
  • the hydraulic cylinder includes: an oil passage main body, an oil passage cover, and an oil passage lower cover;
  • the outer wall of the oil passage main body is in sealing contact with the inner wall of the inner oil barrel, and enables the oil passage main body to move axially relative to the inner oil barrel;
  • a hydraulic oil chamber penetrating through the oil passage body is formed in the oil passage main body, the piston is arranged in the hydraulic oil chamber, and divides the hydraulic oil chamber into the first hydraulic oil chamber and the second hydraulic oil chamber.
  • the oil upper cover is sealed on the upper end of the hydraulic oil chamber, and the oil lower cover is sealed on the lower end of the hydraulic oil chamber;
  • the first overload protection oil passage is arranged on the oil cover, and the second overload protection oil passage is arranged on the piston rod.
  • a first pressure one-way valve is arranged on the first overload protection oil circuit
  • a second pressure one-way valve is arranged on the second overload protection oil circuit
  • the first pressure one-way valve The valve is opened when the pressure difference on both sides is greater than a first preset value
  • the second pressure check valve is opened when the pressure difference on both sides is greater than a second preset value.
  • a piston cylinder is sheathed on the outside of the piston rod, and one end of the piston cylinder is connected to the oil cylinder cover, and the other end is connected to the hydraulic cylinder block.
  • the piston rod includes an upper piston rod and a lower piston rod connected to each other, the upper piston rod is connected to the handle, and the lower piston rod is connected to the piston.
  • Fig. 1 is a schematic diagram of a hydraulic oil circuit system in an embodiment of the present application
  • Fig. 2 is a schematic sectional view of a hydraulic jack on a first sectional plane in an embodiment of the present application
  • Fig. 3 is a partially enlarged schematic diagram A of Fig. 2;
  • Fig. 4 is a partial sectional view of the hydraulic jack on the second sectional plane in an embodiment of the present application
  • Fig. 5 is a partially enlarged schematic diagram B of Fig. 4;
  • Fig. 6 is a top view of the assembly of components such as the hydraulic cylinder block and the piston rod in an embodiment of the present application;
  • Fig. 7 is a schematic sectional view along A-A of Fig. 6;
  • Fig. 8 is a schematic cross-sectional view along B-B of Fig. 6;
  • Figure 9 and Figure 10 are three-dimensional schematic diagrams of the main body of the oil passage at different angles in an embodiment of the present application.
  • Fig. 11 is an exploded schematic diagram of the bearing assembly installed in the outer oil cylinder in an embodiment of the present application.
  • Figure 12 and Figure 13 are cross-sectional views of the bearing assembly installed in the outer oil cylinder in an embodiment of the present application;
  • Figure 14 and Figure 15 are the installation of the bearing assembly on the outer oil cylinder in an embodiment of the present application, where the pins are located in different positions;
  • Fig. 16 is a schematic diagram of the three-dimensional structure of the slider and the top block in an embodiment of the present application.
  • Fig. 17 is a schematic diagram of a hydraulic jack used as a manual winch in an embodiment of the present application.
  • 101-oil circuit main body 101-oil circuit main body; 102-oil circuit cover; 103-oil circuit lower cover;
  • 80-bearing assembly 80-bearing assembly; 81-slider; 811-bolt installation slot; 812-elastic push assembly; 8121-screw; 8122-spring; 8123-top ball;
  • this embodiment provides a hydraulic oil circuit system of a hydraulic jack, which can be used to lift heavy objects or tow heavy objects, depending on the purpose and method of use.
  • the hydraulic oil circuit system mainly includes: a hydraulic cylinder block 10, a load oil chamber 20, a reserve oil chamber 30 and an oil discharge pipeline 21;
  • the hydraulic cylinder block 10 is provided with a piston 13, and the piston 13 divides the interior of the hydraulic cylinder block 10 into a first hydraulic oil chamber 11 and a second hydraulic oil chamber 12, the first hydraulic oil chamber 11 has a first oil port, and the second hydraulic oil chamber 12
  • the oil chamber 12 has a second oil port; both the first oil port and the second oil port communicate with the load oil chamber 20 in one direction, and enable the first oil port and the second oil port to communicate with the load oil chamber 20 in one direction; Both the first oil port and the second oil port communicate with the reserve oil chamber 30 in one direction, and enable the reserve oil chamber 30 to communicate with the first oil port and the second oil port respectively;
  • the hydraulic cylinder block 10 is a double-acting hydraulic cylinder body, that is to say, the first hydraulic oil chamber 11 and the second hydraulic oil chamber 12 are both working chambers, so that the reciprocating movement of the piston 13 can change the volumes of the first hydraulic oil chamber 11 and the second hydraulic oil chamber 12, so that the first One of the first oil port and the second oil port delivers hydraulic oil to
  • the bearing assembly 80 for supporting heavy objects can be arranged outside the oil reserve chamber 30 and fixedly arranged relative to the oil reserve chamber 30 .
  • the bearing assembly 80 may not be provided separately, but may directly use the external structure of the reserve oil chamber 30 to realize the function of supporting heavy objects.
  • an oil unloading pipeline 21 is also provided, and the oil unloading pipeline 21 is connected to the load oil chamber 20 and the reserve oil chamber 30; The hydraulic oil in 20 flows into the reserve oil chamber 30.
  • the first oil port communicates with the reserve oil chamber 30 through the first oil inlet passage 111 and communicates with the load oil chamber 20 through the first oil outlet passage 112.
  • the first oil inlet passage 111 is provided with a first One-way valve 113
  • the second one-way valve 114 is set on the first oil outlet 112
  • the second oil port communicates with the reserve oil chamber 30 through the second oil inlet 121, and communicates with the load oil through the second oil outlet
  • the cavity 20 is connected, the second oil inlet passage 121 is provided with a third one-way valve 123 , and the second oil outlet passage 122 is provided with a fourth one-way valve 124 .
  • the one-way communication between the first oil port and the second oil port and the load oil chamber 20 and the one-way communication between the first oil port and the second oil port and the reserve oil chamber 30 are realized.
  • a first overload protection oil circuit 115 is connected between the first hydraulic oil chamber 11 and the reserve oil chamber 30
  • a second overload protection oil circuit is connected between the second hydraulic oil chamber 12 and the reserve oil chamber 30 125.
  • the first overload protection oil circuit 115 is opened to release pressure to the reserve oil chamber 30 to avoid damage to the hydraulic cylinder block 10.
  • the second overload protection oil circuit 125 is opened to release the pressure to the reserve oil chamber 30 to avoid damage to the hydraulic cylinder block 10 .
  • a first pressure one-way valve 1151 may be provided on the first overload protection oil circuit 115
  • a second pressure one-way valve 1251 may be provided on the second overload protection oil circuit 125 . Both the first pressure one-way valve 1151 and the second pressure one-way valve 1251 can only be opened under a preset pressure, and the values of the two preset pressures can be the same or different.
  • the hydraulic jack includes an outer oil cylinder 40, the outer wall of the outer oil cylinder 40 is provided with a bearing assembly 80 for carrying or pulling heavy objects, the outer oil cylinder
  • the outer wall of 40 has a plurality of fixed positions, and the bearing assembly 80 can be fixed at any of the fixed positions and can move between any two of the fixed positions.
  • the fixed position of the carrying assembly 80 can be adjusted first, so that the carrying assembly 80 is fixed at the nearest position from the lifted surface. Then carry out the lifting work, thereby reducing the invalid stroke.
  • each fixed position is provided with a card slot 44
  • the bearing assembly 80 includes: a slider 81, a latch 82, and a top block 83; Move, the slide block 81 is provided with a latch installation groove 811, and one end of the latch 82 is hinged to the latch installation groove 811 by the hinge shaft 84, and the latch 82 has an open state (as shown in Figure 15) and a locked state (as shown in Figure 14 ), and can be switched between the open state and the locked state; in the open state, the slider 81 can move relative to the outer oil cylinder 40; In the slot 44, the slider 81 is fixed relative to the outer oil cylinder 40.
  • the latch 82 rotates into the latch installation groove 811 , and in the unlocked state, one end of the latch 82 rotates out of the latch installation groove 811 .
  • the top block 83 is installed on the slider 81 and can move synchronously with the slider 81 .
  • the top block 83 is detachably connected to the slider 81 .
  • the specific connection method can be plug-in, clamping, mortise and tenon connection, screw connection and so on.
  • the slider 81 is provided with an insertion slot 813, the insertion slot 813 includes a first guide portion 8131 and a limiting portion 8132; the top block 83 has an insertion portion 831, and the insertion portion 831 includes a second guide portion 8311 With the limiting block 8312, the insertion part 831 can be inserted into the insertion slot 813, and the second guiding part 8311 is matched with the first guiding part 8131, and the limiting block 8312 is matched with the limiting part 8132.
  • This plug-in structure enables the slider 81 and the top block 83 to be connected and disassembled quickly, and the stability after the connection is high.
  • the mating surfaces of the first guiding portion 8131 and the second guiding portion 8311 are both curved surfaces.
  • the slider 81 is provided with an elastic pushing assembly 812
  • the latch 82 is provided with a groove 821.
  • the elastic pushing assembly 812 is against the groove 821, as shown in the figure 12 and FIG. 13 , the elastic push assembly 812 rests in the groove 821 to limit the rotation of the latch 82.
  • the restriction of the elastic push assembly 812 to the latch 82 can prevent the latch 82 from rotating arbitrarily and exert a certain external force on the latch 82.
  • the groove 821 can be separated from the restriction of the elastic pushing component 812, so as to switch from the locked state to the opened state.
  • the elastic pushing assembly 812 includes a screw 8121, a spring 8122 and a top bead 8123, the slider 81 is provided with a mounting through hole, the screw 8121, a spring 8122 and a top bead 8123 are arranged in the installation through hole, and the spring 8122 is compressed by the screw 8121 and the top bead Between 8123, a part of the top ball 8123 can leak out from the end of the installation through hole, so as to push against the groove 821.
  • the latch 82 is located in the latch installation groove 811, at this time the position of the slider 81 is fixed; as shown in Figure 15, one end of the latch 82 is turned out from the latch installation groove 811, at this time the slider can be adjusted up and down 81 positions.
  • the top block 83 is detachably connected to the slider 81 .
  • the structure of the top block 83 can have various forms.
  • the lifting surface of the top block 83 is provided with anti-slip stripes, and the lifting surface of the top block 83 can be perpendicular to the lifting direction of the outer oil cylinder 40 (that is, the horizontal setting as shown in the figure). Can be set to bevel for special working environment. Therefore, the detachable connection between the top block 83 and the slide block 81 can facilitate the replacement of different types of top blocks 83 .
  • the top block 83 and the slide block 81 can also be integrally formed.
  • the number of bolts 82 is two, and the slider 81 is provided with two bolt installation grooves 811, and each bolt installation groove 811 is hinged to a bolt 82; Axisymmetric. Such setting can make the connection between the slider 81 and the outer oil cylinder 40 stronger and more stable.
  • the hydraulic jack includes: an inner oil cylinder 50, a hydraulic cylinder block 10 and a piston rod 60,
  • the outer oil cylinder 40 is provided with a handle 41; the outer oil cylinder 40 is sleeved outside the inner oil cylinder 50, and can move relative to the inner oil cylinder 50, and the outer oil cylinder 40 and the inner oil cylinder 50 define a reserve oil chamber 30;
  • the reserve oil chamber 30 can be in the inner oil cylinder 50, also can be between the outer oil cylinder 40 and the inner oil cylinder 50, also can be both in the inner oil cylinder 50 and between the outer oil cylinder 40 and the inner oil cylinder 50 .
  • the hydraulic cylinder block 10 is arranged in the inner oil cylinder 50, and can seal and move along the axial direction of the inner oil cylinder 50.
  • the two ends of the hydraulic cylinder block 10 are respectively the load oil chamber 20 and the reserve oil chamber 30;
  • There is a piston 13, and the piston 13 divides the interior of the hydraulic cylinder 10 into a first hydraulic oil chamber 11 and a second hydraulic oil chamber 12, the first hydraulic oil chamber 11 has a first oil port, and the second hydraulic oil chamber 12 has a second oil port ;
  • Both the first oil port and the second oil port are in one-way communication with the load oil chamber 20, and both the first oil port and the second oil port can flow to the load oil chamber 20 in one direction;
  • the ports are all in unidirectional communication with the reserve oil chamber 30, and enable the reserve oil chamber 30 to communicate with the first oil port and the second oil port in one direction;
  • the hydraulic cylinder block 10 has an oil unloading pipeline 21, which is connected to the load oil chamber 20 and the reserve oil chamber 30, and the oil unloading pipeline 21 is provided with an oil unloading switch 211; the oil unloading switch 211 can control the on-off of the oil unloading pipeline 21 .
  • One end of the piston rod 60 is connected to the piston 13, and the other end is connected to the handle 41, so that the handle 41 can drive the piston 13 to move back and forth through the piston rod 60, so as to change the volumes of the first hydraulic oil chamber 11 and the second hydraulic oil chamber 12, Therefore, one of the first oil port and the second oil port delivers hydraulic oil to the load oil chamber 20 , while the other absorbs oil from the reserve oil chamber 30 .
  • the piston rod 60 also plays a certain supporting role.
  • the hydraulic oil in the load oil chamber 20 increases, the hydraulic cylinder block 10 is pushed to move upward, and the supporting force is transmitted to the handle 41 through the piston rod 60, and further to the
  • the outer oil cylinder 40 makes the hydraulic cylinder block 10 , the outer oil cylinder 40 and the piston rod 60 move upward relative to the inner oil cylinder 50 synchronously, so as to realize the effect of jacking or traction.
  • the outer oil cylinder 40 is provided with an oil cylinder cover 42, and the oil cylinder cover 42 is sealed on the top of the outer oil cylinder 40, the handle 41 is hinged to the oil cylinder cover 42, and the piston rod 60 passes through the oil cylinder cover 42 and The handle 41 is hinged. That is to say, the top of the outer oil cylinder 40 in this embodiment is sealed by the oil cylinder cover 42 , and the oil cylinder cover 42 also plays the role of installing the handle 41 .
  • the outer oil cylinder 40 is provided with a sleeve 43, the sleeve 43 is fixedly connected to the bottom of the outer oil cylinder 40, the sleeve 43 is sleeved outside the inner oil cylinder 50, and can be along the inner oil cylinder 50.
  • the outer wall is sealed to slide.
  • the sleeve 43 can act as a seal at the bottom of the outer oil cylinder 40, and at the same time play a guiding role to ensure the coaxiality of the outer oil cylinder 40 and the inner oil cylinder 50, and prevent the outer oil cylinder 40 from skewing during the rising process.
  • the shaft sleeve 431 is coaxially arranged with the sleeve 43, and fixed relative to the sleeve 43, the sleeve 43 is sleeved on the outer wall of the inner oil cylinder 50, and can be relatively Axial movement of the inner oil cylinder 50.
  • the shaft sleeve 431 also plays a guiding role, and multiple shaft sleeves 431 can be provided. As shown in FIG. 3 , one shaft sleeve 431 is respectively provided at the upper and lower ends of the sleeve 43 .
  • the bottom of the inner oil cylinder 50 is provided with a base sealing body 51, and the base sealing body 51 seals the bottom of the inner oil cylinder 50;
  • the inner cavity is open.
  • the inner cavity of the inner oil cylinder 50 communicates with the inner cavity of the outer oil cylinder 40
  • the reserve oil chamber 30 is formed in the inner cavity of the oil cylinder 50 and the inner cavity of the outer oil cylinder 40 .
  • the bottom of the inner oil cylinder 50 may not be provided with a base sealing body 51, but the bottom of the inner oil cylinder 50 is directly designed as a sealed structure, that is to say, the inner oil cylinder 50 may be a cylinder with only one upper opening.
  • the bottom of the inner oil cylinder 50 is provided with a base sealing body 51 for sealing.
  • the sealing body 51 of the base can also be used as the supporting base of the hydraulic jack, and a larger supporting surface can be designed. Also can specially design a base 52.
  • the base sealing body 51 is connected to a base 52 , and the base 52 is detachably connected to the base sealing body 51 .
  • the base 52 can also be removed for use when necessary.
  • the outer wall of the inner oil cylinder 50 is provided with a limiting component 53 , the limiting component 53 is used to limit the movement range of the outer oil cylinder 40 , and the limiting component 53 is located at the upper middle of the inner oil cylinder 50 position, the limiting member 53 is fixed relative to the inner oil cylinder 50 .
  • the hydraulic cylinder block 10 mainly includes: an oil passage main body 101, an oil passage cover 102 and an oil passage lower cover 103; the outer wall of the oil passage main body 101 and the inner oil cylinder 50
  • the inner wall of the oil circuit is in sealing contact, and enables the oil passage body 101 to move axially relative to the inner oil cylinder 50
  • the oil passage main body 101 is formed with a hydraulic oil chamber penetrating through the oil passage main body 101, and the piston 13 is arranged in the hydraulic oil chamber, and
  • the hydraulic oil chamber is divided into the first hydraulic oil chamber 11 and the second hydraulic oil chamber 12
  • the oil upper cover 102 is sealed on the upper end of the hydraulic oil chamber
  • the oil passage lower cover 103 is sealed on the lower end of the hydraulic oil chamber
  • the piston rod 60 passes through the oil passage
  • the cover 102 is connected to the piston 13 , and the oil discharge line 21 is formed in the oil passage body 101 .
  • FIG. 1 For the hydraulic principle of the hydraulic jack in this embodiment, refer to FIG. 1
  • the first oil port communicates with the reserve oil chamber 30 through the first oil inlet passage 111, and communicates with the load oil chamber 20 through the first oil outlet passage 112, the first oil inlet A first one-way valve 113 is set on the road 111, and a second one-way valve 114 is set on the first oil outlet 112; the second oil port communicates with the reserve oil chamber 30 through the second oil inlet
  • the oil outlet passage 122 communicates with the load oil chamber 20 , the second oil inlet passage 121 is provided with a third one-way valve 123 , and the second oil outlet passage 122 is provided with a fourth one-way valve 124 .
  • the first oil inlet passage 111 is formed on the oil upper cover 102
  • the first oil outlet passage 112 and the second oil inlet passage 121 are both formed on the oil passage main body 101
  • the second oil outlet passage 122 is formed on the oil passage lower cover 103 .
  • a first sinker 1011 is formed on the upper end of the oil passage body 101
  • a second sinker 1012 is formed on the lower end of the oil passage main body 101
  • at least part of the structure of the oil passage cover 102 is set In the first sinker 1011
  • at least part of the structure of the oil passage lower cover 103 is arranged in the second sinker 1012
  • the entrance of the first oil outlet 112 is located in the first sinker 1011
  • the outlet of the second oil inlet 121 Located in the second sinker 1012.
  • a certain gap can be formed between the top of the oil passage lower cover 103 and the bottom of the second sinker 1012, so that the hydraulic oil at the outlet of the second oil inlet passage 121 can quickly flow into the second hydraulic pressure.
  • a runner groove can be provided on the top of the oil passage lower cover 103; similarly, a certain clearance can also be provided between the bottom of the oil passage cover 102 and the bottom of the first sinker 1011 , so that the hydraulic oil in the first hydraulic oil chamber 11 enters the entrance of the first oil outlet passage 112, if no clearance is provided, a flow passage groove can also be provided at the bottom of the oil passage cover 102.
  • an oil discharge rod 70 is arranged in the inner oil cylinder 50, one end of the oil discharge rod 70 is arranged on the oil discharge pipeline 21, and the other end passes through the oil cylinder cover 42, and is connected to the oil discharge pipe.
  • the handle 71 and the oil discharge handle 71 are hinged to the oil tank cover 42 , and can control the connection and closure of the oil discharge pipeline 21 through the oil discharge rod 70 .
  • a return spring (not shown) may be provided on the oil unloading lever 70.
  • a first overload protection oil circuit 115 is connected between the first hydraulic oil chamber 11 and the reserve oil chamber 30
  • a second overload protection oil circuit is connected between the second hydraulic oil chamber 12 and the reserve oil chamber 30 125.
  • the first overload protection oil circuit 115 is opened to release pressure to the reserve oil chamber 30 to avoid damage to the hydraulic cylinder block 10.
  • the second overload protection oil circuit 125 is opened to release the pressure to the reserve oil chamber 30 to avoid damage to the hydraulic cylinder block 10 .
  • a first pressure one-way valve 1151 may be provided on the first overload protection oil circuit 115
  • a second pressure one-way valve 1251 may be provided on the second overload protection oil circuit 125 . Both the first pressure one-way valve 1151 and the second pressure one-way valve 1251 can only be opened under a preset pressure, and the values of the two preset pressures can be the same or different.
  • the first overload protection oil passage 115 is arranged on the oil cover 102
  • the second overload protection oil passage 125 is arranged on the piston rod 60 .
  • At least part of the piston rod 60 is provided with a hollow structure, and the bottom end of the piston 13 has an opening, so that the hydraulic oil in the second hydraulic oil chamber 12 can flow into the hollow piston rod 60 through the opening, and then flow to the second pressure unidirectional
  • the position of the valve 1251 is such that the outlet of the second pressure check valve 1251 is set to communicate with the reserve oil chamber 30 .
  • the first overload protection oil circuit 115 is provided with a first pressure one-way valve 1151
  • the second overload protection oil circuit 125 is provided with a second pressure one-way valve 1251
  • the first pressure one-way valve 1151 is two It opens when the pressure difference on both sides of the second pressure check valve 1251 is greater than the first preset value, and opens when the pressure difference on both sides of the second pressure check valve 1251 is greater than the second preset value.
  • the opening pressure value of the first pressure one-way valve 1151 and the opening pressure value of the second pressure one-way valve 1251 may be the same or different.
  • a piston cylinder 61 is sheathed on the outside of the piston rod 60 , one end of the piston cylinder 61 is connected to the oil cylinder cover 42 , and the other end is connected to the hydraulic cylinder block 10 .
  • the piston barrel 61 plays a supporting role between the hydraulic cylinder block 10 and the oil barrel cover 42.
  • the upwardly moving hydraulic cylinder block 10 transmits the supporting force to the oil barrel cover 42 through the piston barrel 61.
  • the piston barrel 61 supports the oil barrel cover 42
  • the supporting force of the piston rod 60 on the oil cylinder cover 42 is reduced or has no supporting force.
  • Such setting can reduce the damage to the piston rod 60 and improve the service life of the hydraulic jack.
  • the piston rod 60 includes an upper piston rod 62 and a lower piston rod 63 connected to each other, the upper piston rod 62 is connected to the handle 41 , and the lower piston rod 63 is connected to the piston 13 .
  • the lower piston rod 63 is provided with a hollow structure, and a second pressure check valve 1251 is arranged therein, and one or more through holes can be opened on the piston barrel 61 to connect the hydraulic oil in the piston barrel 61 with the reserve oil chamber. 30 connections.
  • the hydraulic jack of the present embodiment also has the function of a manual winch, and the specific usage method is as follows: referring to Fig. 17, the fiber rope 5 is passed through the base attachment 3, the base 52 and the drag attachment 4 (to prevent overturning when stressed), and the fiber rope 5 One end is connected with the fixed object, and the other end is connected with the hydraulic jack base 52; one end of the drag chain 2 is connected with the dragged object 1, and the other end is fixed on the dragging attachment 4 of the hydraulic jack, and the handle 41 is pushed and pulled to realize the dragging of the dragged object 1. Pulling, the hook on the base attachment 3 and the hook on the drag attachment 4 alternately hook the drag chain 2, so that when the hydraulic jack reciprocates, the dragging object 1 will not slide to the initial position, thereby realizing the function of the manual winch.
  • a first feature being "on” or “under” a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch.
  • “above”, “above” and “above” the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • “Below”, “beneath” and “beneath” the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the terms “one embodiment,” “some embodiments,” “example,” “specific examples,” or “some examples” mean specific features, structures, materials, or features described in connection with the embodiment or examples. Features are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)

Abstract

Vérin hydraulique comprenant un cylindre à huile externe (40), la paroi extérieure du cylindre à huile externe (40) est pourvue d'un ensemble palier (80) utilisé pour porter ou tirer des objets lourds, la paroi externe du cylindre à huile externe (40) présente une pluralité de positions fixes, et l'ensemble palier (80) peut être fixé à n'importe quelle position fixe et peut se déplacer entre deux positions fixes quelconques. Le vérin hydraulique peut ajuster la position de l'ensemble palier (80) sur le cylindre à huile externe (40), de sorte à effectuer rapidement une opération de levage ou de traction, à réduire la distance d'une course de repos et à améliorer l'adaptabilité.
PCT/CN2021/095857 2021-05-25 2021-05-25 Vérin hydraulique WO2022246655A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/095857 WO2022246655A1 (fr) 2021-05-25 2021-05-25 Vérin hydraulique

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Application Number Priority Date Filing Date Title
PCT/CN2021/095857 WO2022246655A1 (fr) 2021-05-25 2021-05-25 Vérin hydraulique

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WO2022246655A1 true WO2022246655A1 (fr) 2022-12-01

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281820A (en) * 1979-12-26 1981-08-04 Martin Coy J Lifting jack for vehicles or the like
CN1182047A (zh) * 1996-11-11 1998-05-20 Mvp(香港)工业有限公司 可一步到位的千斤顶液压回路系统
US20090057633A1 (en) * 2007-07-16 2009-03-05 Russ Beck Jack assembly
CN104228784A (zh) * 2013-06-18 2014-12-24 塞昆特高性能产品公司 千斤顶组件
US9022355B1 (en) * 2014-05-14 2015-05-05 Bruce W. Pigeon Hydraulic jack attachment
EP3000766A1 (fr) * 2013-05-20 2016-03-30 Melchor Gabilondo, S.A. Outil de levage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4281820A (en) * 1979-12-26 1981-08-04 Martin Coy J Lifting jack for vehicles or the like
CN1182047A (zh) * 1996-11-11 1998-05-20 Mvp(香港)工业有限公司 可一步到位的千斤顶液压回路系统
US20090057633A1 (en) * 2007-07-16 2009-03-05 Russ Beck Jack assembly
EP3000766A1 (fr) * 2013-05-20 2016-03-30 Melchor Gabilondo, S.A. Outil de levage
CN104228784A (zh) * 2013-06-18 2014-12-24 塞昆特高性能产品公司 千斤顶组件
US9022355B1 (en) * 2014-05-14 2015-05-05 Bruce W. Pigeon Hydraulic jack attachment

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