Electric high-pressure hydraulic cutting pliers

Abstract

The invention discloses an electric high-pressure hydraulic shearing clamp which is composed of a shearing clamp assembly, a handheld hydraulic power system and a rotary joint connecting assembly. The cutting nipper assembly is a cutting nipper driven by a hydraulic oil cylinder; the handheld hydraulic power system comprises a handheld motor gun and a hydraulic pump assembly of an integrated structure. The hydraulic pump assembly of the integrated structure comprises an integrated valve block and a pump cover which form a shell. The rotary joint connecting assembly is a rotary connecting pair in sealed connection, and the two ends of the rotary joint connecting assembly are connected with the cutting nipper assembly and the handheld hydraulic power system respectively. An external hydraulic power source is not needed, the hydraulic pump, the reversing valve set and the transmission oil way are integrally installed on the integrated valve block, external oil ways are reduced, transition connector parts are omitted, the hidden danger of oil leakage is reduced, and the overall structure is more compact and stable; the rotary joint connecting assembly is adopted, so that the shearing jaw can rotate by 360 degrees, the shearing and forcible entry requirements for rescue in more complex scenes are met, and the rescue efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fire rescue equipment design and manufacturing, especially to the technical field of fire rescue hydraulic shears design and manufacturing, and specifically to an electric high-pressure hydraulic shears. BACKGROUND

[0002] The hydraulic shears is a professional breaking tool for fire rescue, which works by hydraulic principle. When working, the hydraulic pump pressurizes the oil to push the piston to move, so that the shears arm is closed to generate strong shearing force. The hydraulic shears has the advantages of large shearing force, light structure, short time consumption for opening and closing, etc., and is widely used in traffic accident rescue, earthquake disaster and building collapse rescue, air disaster and sea disaster rescue, etc. It can quickly shear hard components such as steel bars and steel plates, and accelerate the rescue process.

[0003] The hydraulic shears in the prior art is composed of a shears jaw assembly and a hydraulic cylinder, which is an execution part of the hydraulic shears and does not include a hydraulic power source. When the hydraulic shears is normally operated, an external hydraulic power source and a hydraulic oil pipe are needed to provide and transmit hydraulic power, which reduces the efficiency of fire rescue. In addition, the external hydraulic oil pipe makes the operation less flexible. Although the hydraulic shears combining the execution part and the hydraulic power source has appeared on the market, it is set at a fixed angle, which cannot be used at a fixed angle when the space is narrow and the operation space is complex, thereby affecting the rescue process. Therefore, we propose an electric super-high-pressure hydraulic shears. SUMMARY

[0004] The present application aims to provide an electric high-pressure hydraulic shears, which can effectively solve the problems in the background art.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] An electric high-pressure hydraulic shears, characterized in that it is composed of a shears assembly, a handheld hydraulic power system, and a rotary joint connecting assembly.

[0007] The shears assembly is a hydraulic cylinder driven shears.

[0008] The handheld hydraulic power system comprises a handheld electric machine gun and an integrated hydraulic pump assembly; the handheld electric machine gun comprises a battery and an electric motor and a control assembly driven by the battery; the integrated hydraulic pump assembly comprises an integrated valve block constituting a shell and a pump cover; the pump cover serves as a connecting seat, a mounting hole is arranged at the center of the connecting seat, a bearing is arranged in the mounting hole, and a hydraulic oil tank is arranged in the other available space of the pump cover; the integrated valve block serves as a mounting seat, a hydraulic pump is mounted in the mounting seat, a drive shaft of the hydraulic pump is combined with the electric motor drive through the central mounting hole of the pump cover, and the other block space of the integrated valve block is provided with output and input hydraulic oil paths matched with the hydraulic pump and the hydraulic oil tank.

[0009] The rotary joint connecting assembly is a sealed rotary connecting pair, and the two ends are respectively connected with the shearing tongs assembly and the handheld hydraulic power system; the connecting pair comprises a male rotary joint, a female rotary joint, and a hydraulic oil path is arranged between the shearing tongs assembly and the handheld hydraulic power system.

[0010] Further, a reversing valve group is arranged on the output and input hydraulic oil paths of the integrated valve block, a spring is mounted on the exposed end of the valve core of the reversing valve group, and one end of a reversing handle is connected with the spring, and the other end of the reversing handle is connected with a sliding bolt mounted on the pump cover and is close to the equipment control button; when the reversing handle is pulled, the reversing handle moves along the axial direction of the integrated valve block and the pump cover, drives the valve core of the reversing valve group to move, and manual reversing control of the reversing valve group is realized.

[0011] Further, the rotating shaft of the electric motor passes through the mounting hole and is combined with the drive shaft of the hydraulic pump through a speed change gear set, and the hydraulic pump is directly connected with the hydraulic oil tank arranged on the pump cover.

[0012] Further, the pump cover is fixedly connected with the integrated valve block, the pump cover is internally provided with one or more hydraulic oil tank mounting areas; the integrated valve block is internally provided with one or more pump heads, and the pump heads are correspondingly arranged with the hydraulic oil tanks in the pump cover; the motor and the hydraulic pump shaft are connected through the central mounting hole of the pump cover, and the mounting position of an angular contact ball bearing is reserved.

[0013] Further, the hydraulic pump is a plunger hydraulic pump or a gear hydraulic pump; wherein the plunger hydraulic pump heads are distributed in parallel on a single plane or multiple planes, and the output structure adopts a horizontal shaft output structure or a vertical shaft output structure.

[0014] Further, the rotary joint connecting assembly comprises a male flange, a male rotary joint, a female rotary joint and a female flange; one end of the male flange is fixedly connected with the integrated valve block, and the other end is connected with the male rotary joint; the other end of the male rotary joint is connected with the female rotary joint in a sealed and matched manner, and the two can rotate by 360 degrees along the axial direction; the other end of the female rotary joint is connected with the female flange, and the female flange is fixedly connected with the hydraulic oil cylinder of the shearing tongs assembly.

[0015] Further, the male flange, the male rotary joint, the female rotary joint and the female flange are provided with hydraulic oil paths and are communicated with each other; hydraulic oil passes through the integrated valve block, and then passes through the male flange, the male rotary joint, the female rotary joint and the female flange in sequence, and is collected into the hydraulic oil cylinder to push the extension or retraction of the hydraulic oil cylinder piston rod.

[0016] Further, the hydraulic oil cylinder piston rod of the shearing tongs assembly is connected with one end of a piston connecting head, the other end of the piston connecting head is connected with a pair of rotary connecting rods through a bolt respectively, the rotary connecting rods and the piston connecting head can rotate around the axis of the bolt; the other end of the rotary connecting rods is connected with a pair of symmetrically arranged shearing tongs arms through a bolt respectively, and the connection part can rotate; the shearing tongs arms are connected with the outer supporting rods of the hydraulic oil cylinder cylinder through a pin shaft at the intersection, and the shearing tongs arms rotate around the axis of the pin shaft to realize the closing and opening of the shearing tongs.

[0017] Further, an auxiliary handle for hand holding is arranged outside the female flange, the auxiliary handle is coaxial with the female flange and can rotate around the female flange, and the auxiliary handle can be adjusted to a vertical position during 360-degree rotation of the shearing tongs; a tension adjusting screw is arranged on one side of the auxiliary handle, and the mounting tension of the auxiliary handle and the female flange can be adjusted through the adjusting screw.

[0018] The electrically-operated ultrahigh-pressure hydraulic shearing tongs have the following beneficial effects:

[0019] The hydraulic shearing tongs execution part is combined with the hydraulic power source, and an external hydraulic power source is not needed. The hydraulic pump, the reversing valve group and the transmission oil path are integrated and installed on the integrated valve block, external oil paths are reduced, transition joint parts are cancelled, oil leakage risks are reduced, the possibility of impurities entering the hydraulic power system is reduced, and the overall structure is more compact and stable.

[0020] The rotary joint connecting assembly enables the shearing tongs to rotate by 360 degrees, meets the shearing and breaking requirements of more complex scene rescue, and improves the rescue efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure is a hydraulic power system principle diagram of the embodiment of the present application.

[0022] Figure 2 The figure is a three-dimensional structure schematic diagram of the embodiment of the present application.

[0023] Figure 3 The figure is a left side view structure schematic diagram of the embodiment of the present application.

[0024] Figure 4 The figure is a three-dimensional structure schematic diagram of the integrated valve block of the embodiment of the present application.

[0025] Figure 5 The figure is a sectional view schematic diagram of the integrated valve block of the embodiment of the present application.

[0026] Figure 6 The pump cover sectional view of the embodiment of the present application.

[0027] Figure 7 The rotating joint connecting assembly schematic view of the embodiment of the present application.

[0028] Figure 8 The plunger hydraulic pump head arrangement schematic view of the three groups of pump head of the embodiment of the present application.

[0029] Figure 9 The plunger hydraulic pump head arrangement schematic view of the six groups of pump head of the embodiment of the present application.

[0030] The reference signs are explained as follows: 101 is the motor (including the electric control system), 102 is the battery, 201 is the integrated valve block, 202 is the reversing valve group, 203 is the hydraulic pump, 204 is the safety overflow valve, 205 is the pump cover, 2011 is the hydraulic oil circuit, 2012 is the bearing seat, 2013 is the pump cavity, 2014 is the mounting hole, 208 is the plunger pump head, 209 is the eccentric bearing, 301 is the reversing handle, 401 is the male flange, 402 is the male rotating joint, 403 is the female rotating joint, 404 is the female flange, 501 is the bolt, 502 is the pin shaft, 503 is the piston connecting head, 504 is the rotating connecting rod, 505 is the shearing force pincer arm, 601 is the auxiliary handle, 701 is the hydraulic oil cylinder, and 801 is the hydraulic oil tank. DETAILED DESCRIPTION

[0031] The present application is further described below in conjunction with specific embodiments, which are further illustrations of the principles of the present application and do not limit the present application in any way. The same or similar technology as the present application does not exceed the protection scope of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrange", "open", "mount", "connect", "connect" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The embodiments of the present application will be described in detail below.

[0035] The electric high-pressure hydraulic shearing tongs of the embodiments of the present application comprise a shearing tongs assembly, a handheld hydraulic power system, and a rotary joint connecting assembly.

[0036] The handheld hydraulic power system comprises a hydraulic oil tank, a hydraulic pump, a hydraulic oil circuit, a reversing valve group, an integrated valve block, a variable speed gear set, a hydraulic oil cylinder, etc. It also comprises a driving motor, a battery, a control circuit board, a display, control buttons and other electrical elements.

[0037] The shearing assembly comprises a pair of symmetrically arranged shearing tongs arms, a latch, an auxiliary handle, a piston connecting head, and a pair of rotary connecting rods.

[0038] The rotary joint connecting assembly is composed of a male flange, a male rotary joint, a female rotary joint, and a female flange. The male flange is fixedly connected to the integrated valve block at one end and connected to the male rotary joint at the other end. The male rotary joint is connected to the female rotary joint at the other end and can rotate 360 degrees. The female rotary joint is connected to the female flange at the other end, and the female flange is fixedly connected to the hydraulic oil cylinder.

[0039] The motor of the handheld hydraulic power system is connected to the hydraulic pump through the variable speed gear set. The hydraulic pump is directly connected to the hydraulic oil tank and draws oil from the tank. The output oil passes through the internal oil circuit of the integrated block, the embedded reversing valve group, and the rotary joint connecting assembly, and then flows into the hydraulic oil cylinder, pushing the piston rod to extend or retract and driving the shearing tongs assembly to move, thereby closing and opening the shearing tongs.

[0040] The hydraulic pump and the reversing valve group are integrally installed in the integrated valve block. The output oil of the hydraulic pump is all collected and conducted to the reversing valve group through the internal oil circuit of the integrated valve block. After reversing, the output oil flows to the rotary joint connecting assembly through the internal oil circuit of the integrated valve block. The return oil also passes through the internal oil circuit and returns to the tank through the reversing valve. The whole has no external oil circuit.

[0041] The valve core exposed end of the reversing valve group is installed with a spring, and is connected with one end of the reversing handle. The other end of the reversing handle is connected with a sliding bolt installed on the pump cover, and is close to the equipment control button. Pulling the reversing handle, the reversing handle will move axially with the integrated valve block and the pump cover, driving the valve core of the reversing valve group to move, realizing the manual reversing control of the reversing valve group.

[0042] The reversing handle is arranged axially outside the integrated valve block and the pump cover.

[0043] The pump cover is fixedly connected with the integrated valve block. The pump cover is internally provided with one or more hydraulic oil tank installation areas. The integrated valve block is internally provided with one or more pump heads, and corresponds to the hydraulic oil tanks in the pump cover one by one. The motor and the hydraulic pump shaft are connected through the center of the pump cover, and the installation position of the angular contact ball bearing is reserved.

[0044] The hydraulic pump is of a plunger hydraulic pump or a gear hydraulic pump, etc. The plunger hydraulic pump head is distributed on a single plane or multiple planes in parallel. Meanwhile, the output structure thereof is of a horizontal shaft output structure or a vertical shaft output structure, etc.

[0045] The male flange, the male rotating joint, the female rotating joint and the female flange are internally provided with hydraulic oil paths, and are communicated with each other. The output hydraulic oil flows through the integrated valve block, and sequentially flows through the male flange, the male rotating joint, the female rotating joint and the female flange, and is collected into the hydraulic oil cylinder, driving the piston rod to extend or retract.

[0046] The handheld hydraulic power system is provided with a filter. The filter is of an internal type or an external type, and the filtering precision thereof is of a coarse filter or a fine filter, etc., so as to filter the impurities in the oil and protect the hydraulic pump equipment.

[0047] One end of the piston connecting head of the shearing tongs assembly is connected with the piston of the hydraulic oil cylinder, and the other end thereof is connected with a pair of rotating connecting rods through a bolt respectively. The rotating connecting rods and the piston connecting head can rotate about the axis of the bolt. The other end of the rotating connecting rods is connected with a pair of symmetrically arranged shearing tongs arms through a bolt respectively. The connecting portions can rotate. The shearing tongs arms are connected with the outer supporting rods of the cylinder barrel of the hydraulic oil cylinder through a pin shaft. The shearing tongs arms rotate about the axis of the pin shaft, so as to realize the closing and opening of the shearing tongs.

[0048] The auxiliary handle is installed outside the female flange, and is connected and fixed with the female flange through a handle plus a mounting ring coaxial with the female flange, so as to rotate about the female flange. During the 360-degree rotation of the shearing tongs, the auxiliary handle can always be adjusted to the vertical position. Meanwhile, a tension adjusting screw is arranged on one side of the auxiliary handle, so as to adjust the mounting tension of the auxiliary handle and the female flange through the adjusting screw.

[0049] The hydraulic oil cylinder is of a single cylinder or a double cylinder. The motor is of a brush motor or a brushless motor, etc.

[0050] The embodiment will be further described in detail below with reference to the drawings.

[0051] As Figure 1 shown, it is a hydraulic power system schematic diagram. Three hydraulic pumps 203 (including hydraulic pump one 203.1, hydraulic pump two 203.2, and hydraulic pump three 203.3) or pump heads 208 are directly driven by the motor 101 to operate, and the output hydraulic oil is combined and then flows into the rodless cavity of the hydraulic cylinder 701 through the safety overflow valve 204 and the manual reversing valve group 202, pushes the piston to extend, drives the shear tongs assembly to act, and realizes the closing of the shear tongs 505. After switching the manual reversing valve group 202, the oil flows back into the rod cavity of the hydraulic cylinder 701, the piston rod retracts, drives the shear tongs assembly to act, and realizes the opening of the shear tongs 505. When the system oil pressure exceeds the set pressure of the safety overflow valve 204, the excess oil flows back into the oil tank 801 through the safety overflow valve 204, ensuring the stability of the system oil pressure.

[0052] As Figure 2 , 3 shown, the motor 101 is partially designed in an integrated manner, including the control assembly of the electric control system, and the overall structure is compact. The connection between the battery 102 and the motor 101 adopts a plug-in design. When the battery 102 is low in power, the standby battery 102 can be quickly replaced to restore the operation.

[0053] As Figure 6 shown, the shaft center of the pump cover 205 is provided with a motor 101 rotating shaft, a bearing seat 2012, and a mounting hole 2014. The motor 101 rotating shaft is connected with the hydraulic pump 203 shaft outside the shaft center of the pump cover 205, the bearing seat 2012, and the mounting hole 2014. Meanwhile, the pump cover 205 is provided with a single or multiple hydraulic oil tank 801 mounting space.

[0054] As Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, the valve core exposed end of the reversing valve group 202 is provided with a spring and is connected with one end of the reversing handle 301. The other end of the reversing handle 301 is connected with the sliding bolt installed on the pump cover 205 and is close to the equipment control button. When the reversing handle 301 is pulled, the reversing handle 301 will move axially along the integrated valve block 201 and the pump cover 205, drives the valve core of the reversing valve group 202 to move, realizes the manual reversing control of the reversing valve group 202, and then switches the oil supply direction, realizes the opening and closing of the hydraulic shear tongs 505.

[0055] The valve body of the manual reversing valve is directly machined from the cutting integrated valve block 201 and is an integral structure with the integrated valve block 201, and the valve core is a separately configured part. The valve core is installed in the valve body to form a complete reversing valve. Since the reversing valve group 202 is a manual reversing valve, one end of the valve core is exposed for manual control of the valve core. Meanwhile, a spring is installed on the exposed end of the valve core of the reversing valve group 202, and the spring force is used to make the valve core in the left position, that is, the pressure oil circuit is in communication with the cylinder rodless chamber. Once the pressure oil circuit has pressure oil flowing, the pressure oil will directly flow into the cylinder rodless chamber to push the piston rod to extend and drive the hydraulic shearing jaw 505 to close. The exposed end of the reversing valve core is also connected to a reversing handle 301, which is connected to the sliding bolt installed on the pump cover 205 through the integrated valve block 201 and the outer surface of the pump cover 205, and is close to the equipment control button, which is convenient for the operator to manually control the reversing valve. Pulling the reversing handle 301 will move the reversing handle along the axial direction of the integrated valve block 201 and the pump cover 205, driving the valve core of the reversing valve group 202 to move, and the valve core overcomes the spring force to switch to the right position, so that the pressure oil circuit is in communication with the cylinder rod chamber, pushing the piston rod to retract, driving the hydraulic shearing jaw 505 to open, and realizing manual reversing control of the reversing valve group.

[0056] As shown in Figure 2 , Figure 3 , Figure 7 , one end of the male flange 401 of the rotary joint connecting assembly is fixedly connected with the integrated valve block 201, and the other end is connected with the male rotary joint 402. The other end of the male rotary joint 402 is connected with the female rotary joint 403, and the two can rotate by 360 degrees. The other end of the female rotary joint 403 is connected with the female flange 404, and the female flange 404 is fixedly connected with the hydraulic oil cylinder 701. The male flange 401, the male rotary joint 402, the female rotary joint 403 and the female flange 404 are provided with hydraulic oil circuits 2011 inside, and are in communication with the integrated valve block 201 and the hydraulic oil cylinder 701. The output hydraulic oil flows through the integrated valve block 201, the male flange 401, the male rotary joint 402, the female rotary joint 403 and the female flange 404 in sequence, and then flows into the hydraulic oil cylinder 701 to push the piston rod to extend or retract.

[0057] As shown in Figure 2 , Figure 3 , Figure 7As shown from the integrated valve block 201 to the end of the oil cylinder 701, there are four components in turn, namely the male flange 101, the male rotary joint 402, the female rotary joint 403 and the female flange 404. The male flange 101 and the female flange 404 play a transition role in assisting the oil passage, enhancing the connection strength of the male rotary joint 402 and the female rotary joint 403. The male flange 101 is used to connect the integrated valve block and the male rotary joint 402, connect the pressure oil passage and the oil return passage of the integrated valve block, and adjust the design position of the pressure oil passage to the shaft center and the oil return passage to the eccentric position, so as to facilitate the communication of the pressure oil passage and the oil return passage of the male rotary joint 402, and at the same time, the male flange 101 enhances the connection strength of the integrated valve block and the male rotary joint 402. The female flange 404 has a similar effect. The male rotary joint 402 and the female rotary joint 403 constitute a rotary pair, and the common central shaft of the two can rotate 360 degrees. The pressure oil passage of the male rotary joint 402 and the pressure oil passage of the female rotary joint 403 are connected along the common central axis. At the contact position of the female rotary joint 403 and the male rotary joint 402, the female rotary joint 403 is provided with an annular oil return passage, which facilitates the communication of the oil return passage of the male rotary joint 402 and meets the requirement of 360-degree rotation of the male and female rotary joints.

[0058] As shown in Figure 2 , Figure 3 , the piston connecting head 503 is connected to the piston rod through threads and moves together with the piston rod when the piston rod is extended and retracted. The other end of the piston connecting head 503 is connected to the upper and lower surfaces of a pair of rotary connecting rods 504 through a latch 501, and the rotary connecting rods 504 can rotate around the axis of the latch 501 and the piston connecting head 503. The other end of the rotary connecting rods 504 is connected to a pair of symmetrically arranged shear tongs 505 through two pin shafts 502, and the connection can rotate. The intersection of the shear tongs 505 is connected to the outer support rod of the cylinder barrel of the hydraulic oil cylinder 701 through a pin shaft 502, and the shear tongs 505 rotate around the axis of the pin shaft 502. When shearing is performed, the piston rod of the hydraulic oil cylinder 701 is extended, driving the piston connecting head 503 to move forward, and a pair of symmetrically arranged rotary connecting rods 504 connected to the piston connecting head 503 also move forward, but are affected by the pin shaft 502 of the shear tongs 505, so that the rotary connecting rods 504 present an eight-shaped opening action, driving the shear tongs 505 to rotate around the axis of the pin shaft 502, so that the tongs close, realizing shearing. After shearing is completed, the piston is retracted, the piston connecting head 503 is retracted at the same time, the eight-shaped closing of the connection end of the rotary connecting rods 504 and the shear tongs 505 drives the shear tongs 505 to move, so that the shear tongs open, completing a shearing operation.

[0059] As shown in Figure 2 , Figure 3As shown, the auxiliary handle 601 is mounted outside the female flange 404 coaxially with the female flange 404 and can rotate around the female flange 404, so that it can be adjusted to the vertical position during the 360-degree rotation of the shearing jaw. At the same time, the auxiliary handle 601 is provided with a tension adjusting screw on one side, and the tension of the auxiliary handle 601 and the female flange 404 can be adjusted by the adjusting screw.

[0060] As shown in Figure 4 、 Figure 5 The integrated valve block 201 is provided with a hydraulic oil path 2011 for outputting oil liquid of the hydraulic pump station 203, and is also a return oil path. A manual reversing valve group 202 valve body and a corresponding hydraulic oil path 2011 are arranged on the integrated valve block 201, and the manual reversing valve group 202 can be composed by only configuring a manual reversing valve group 202 valve core. The integrated valve block 201 also has a hydraulic pump 203 installation chamber, i.e. a pump cavity 2013, which can be combined with a pump head 208 and a pump cover 205 to constitute a complete hydraulic pump 203 pump body.

[0061] The integrated valve block 201 realizes the combination of the manual reversing valve group 202, the pump body 203, and the hydraulic oil path 2011, so that the power structure of the hydraulic system of the electric high-pressure hydraulic shearing clamp is more compact and smaller in size.

[0062] The integrated valve block 201 combines the manual reversing, the pump body, and the hydraulic oil path. The integrated valve block 201 has installation spaces for a hydraulic pump head 208, a hydraulic pump 203 shaft, and a bearing, and acts as a pump shell of the hydraulic pump 203. The hydraulic pump head 208 is embedded and installed in the integrated valve block 201, and together with the pump cover 205, it constitutes the hydraulic pump 203.

[0063] The integrated valve block 201 also has an installation space for a manual reversing valve group 202 valve core. The valve body structure is directly machined by cutting the integrated valve block 201 and is integrated with the valve core. After being installed into the valve core, it can constitute a complete manual reversing valve.

[0064] The integrated valve block 201 is internally provided with a hydraulic oil circuit 2011, including a pressure oil circuit and a return oil circuit. One end of the pressure oil circuit is connected with a pressure oil end of a pump head 208 installed in the integrated valve block 201. Each pump head 208 has a pressure oil circuit matched therewith. The other end of each pressure oil circuit is connected at the center of the integrated valve block 201, forming a total pressure oil circuit and being communicated to the manual reversing valve group 202. After passing through the manual reversing valve group 202, the total pressure oil circuit is communicated with another pressure oil circuit provided in the integrated valve block 201, and then communicated with a pressure oil circuit in the male flange 401 through the connection end surface of the integrated valve block 201 and the male flange 401. The return oil circuit in the male flange 401 is communicated with the return oil circuit provided in the integrated valve block 201 through the connection end surface of the integrated valve block 201 and the male flange 401, and then communicated with the total return oil circuit after passing through the manual reversing valve group 202, and the total return oil circuit is communicated with the oil tank 801.

[0065] The integrated valve block 201 not only bears the structures of the hydraulic pump 203, the manual reversing valve group 202 and the hydraulic oil circuit 2011, but also provides spaces for the installation of the hydraulic pump head 208, the hydraulic pump shaft, the bearing and the valve core of the manual reversing valve group 202. The hydraulic pump 203, the manual reversing valve group 202 and the hydraulic oil tank 801 are organically connected through the internal oil circuit. Meanwhile, the motor, the rotating joint assembly and the shearing assembly are integrally connected in the overall structure of the electric super-high-pressure hydraulic shearing clamp.

[0066] The hydraulic power system can adopt a horizontal shaft output mode or a vertical shaft output mode, and can provide large flow oil for the hydraulic shearing clamp 505 to realize rapid shearing operation.

[0067] As shown in FIGS. 1, 2 and 3, the electric super-high-pressure hydraulic shearing clamp can be provided with three groups of pump heads 208 or six groups of pump heads 208. Figure 8 , Figure 9 , Figure 8 is a schematic view of the arrangement of the plunger hydraulic pump heads of three groups of pump heads. Figure 9 is a schematic view of the arrangement of the plunger hydraulic pump heads of six groups of pump heads. The electric super-high-pressure hydraulic shearing clamp can be provided with three groups of pump heads 208 or six groups of pump heads 208. Figure 8 , or Figure 9 . The plunger hydraulic pumps 203 of the three groups or six groups of pump heads 208 are distributed on a single plane or multiple planes in parallel, so that the hydraulic shearing clamp can realize rapid shearing.

Claims

1. An electric high-pressure hydraulic shearing clamp, characterized in that: It consists of a shearing pliers assembly, a handheld hydraulic power system, and a swivel joint connection assembly; The shearing pliers assembly is a hydraulically driven shearing pliers. The handheld hydraulic power system includes a handheld electric gun and an integrated hydraulic pump assembly. The handheld electric gun includes a battery, a motor, and control components. The integrated hydraulic pump assembly includes an integrated valve block and a pump cover forming the housing. The pump cover also serves as a connecting seat, with a mounting hole in the center. A bearing is installed in the mounting hole, and the remaining space in the pump cover houses the hydraulic oil tank. The integrated valve block also serves as a mounting seat, where the hydraulic pump is installed. The hydraulic pump drive shaft is connected to the motor drive through the mounting hole in the center of the pump cover. The remaining space in the integrated valve block houses the output and input hydraulic oil circuits that match the hydraulic pump and the hydraulic oil tank. The swivel joint connecting assembly is a sealed swivel joint, with its two ends connected to the shearing pliers assembly and the handheld hydraulic power system, respectively. The connecting assembly includes a male swivel joint and a female swivel joint, in which a hydraulic oil circuit is provided to connect the shearing pliers assembly and the handheld hydraulic power system.

2. The electric high-pressure hydraulic shearing pliers according to claim 1, characterized in that: The integrated valve block has a reversing valve assembly installed on its output and input hydraulic oil lines. The valve core of the reversing valve assembly has a spring installed on its exposed end and is connected to one end of the reversing handle. The other end of the reversing handle is connected to a sliding pin installed on the pump cover and is close to the equipment control button. Pulling the reversing handle moves the reversing handle along the axial direction of the integrated valve block and the pump cover, which drives the valve core of the reversing valve assembly to move, thereby realizing manual reversing control of the reversing valve assembly.

3. The electric high-pressure hydraulic shearing pliers according to claim 1, characterized in that: The rotating shaft of the motor passes through the mounting hole and is driven by the hydraulic pump drive shaft through a gear set. The hydraulic pump is directly connected to the hydraulic oil tank located on the pump cover.

4. The electric high-pressure hydraulic shearing pliers according to any one of claims 1 to 3, characterized in that: The pump cover is fixedly connected to the integrated valve block, and the pump cover has one or more hydraulic oil tank installation areas inside; one or more pump heads are installed inside the integrated valve block, and correspond one-to-one with the hydraulic oil tanks inside the pump cover; the motor and the hydraulic pump shaft are connected through the central mounting hole of the pump cover, and the mounting position of the angular contact ball bearing is reserved.

5. The electric high-pressure hydraulic shearing pliers according to claim 4, characterized in that: The hydraulic pump is a piston hydraulic pump or a gear hydraulic pump; wherein, the piston hydraulic pump head is distributed in parallel on a single plane or multiple planes, and its output structure adopts a horizontal axis output structure or a vertical axis output structure.

6. The electric high-pressure hydraulic shearing pliers according to claim 1, characterized in that: The rotary joint connection assembly consists of four parts: a male flange, a male rotary joint, a female rotary joint, and a female flange. One end of the male flange is fixedly connected to the integrated valve block, and the other end is connected to the male rotary joint. The other end of the male rotary joint is sealed to the female rotary joint, and the two can rotate 360 ​​degrees relative to each other along the axial direction. The other end of the female rotary joint is connected to the female flange, and the female flange is fixedly connected to the hydraulic cylinder of the shearing clamp assembly.

7. The electric high-pressure hydraulic shearing pliers according to claim 6, characterized in that: The male flange, male swivel joint, female swivel joint, and female flange are equipped with hydraulic oil circuits and are interconnected. The hydraulic oil passes through the integrated valve block, sequentially through the male flange, male swivel joint, female swivel joint, and female flange, and flows into the hydraulic cylinder to push the piston rod of the hydraulic cylinder to extend or retract.

8. The electric high-pressure hydraulic shearing pliers according to claim 6, characterized in that: The hydraulic cylinder piston rod of the shearing clamp assembly is connected to one end of the piston connector, and the other end of the piston connector is connected to a pair of rotating connecting rods via pins. The rotating connecting rods and the piston connector can rotate around the pin axis. The other end of the rotating connecting rods is connected to a pair of symmetrically arranged shearing clamp arms via pins, and the connection point can rotate. The intersection of the shearing clamp arms is connected to the outer support rod of the hydraulic cylinder barrel via a pin. The shearing clamp arms rotate around the pin axis to realize the closing and opening of the shearing jaws.

9. The electric high-pressure hydraulic shearing pliers according to claim 6, characterized in that: An auxiliary handle for handheld use is provided on the outer side of the female flange. The auxiliary handle is coaxial with the female flange and can rotate around it. It can always be adjusted to a vertical position during the 360-degree rotation of the shear jaws. A tension adjustment screw is provided on one side of the auxiliary handle, which can be used to adjust the tightness of the installation between the auxiliary handle and the female flange.

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