A power-driven percussive tool

Abstract

The application discloses an electric attack tool, comprising: a handle assembly, a plunger mechanism, a driving assembly and a body assembly connected in sequence; wherein the handle assembly comprises an oil storage bin, and the oil storage bin is communicated with the plunger mechanism and the internal oil circuit of the driving assembly. The application sets the traditional oil storage space into the oil storage bin in the handle interior, reduces the external space of the attack tool, and utilizes a mechanical mounting structure to facilitate timely inspection and supplement of hydraulic oil; the application connects the high-pressure pump body, the low-pressure pump body and the conversion valve through a composite plunger pump and a conversion valve oil circuit, integrates the three subassemblies into one, saves space, avoids the failure rate and the pressure internal leakage hidden danger, and simultaneously, the knife seat is provided with multiple tool heads, is diversified in function, and can adapt to complex rescue environments.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rescue equipment, and particularly relates to an electric assault tool. BACKGROUND

[0002] The electric hydraulic shearing and expanding pincers in the prior art are usually composed of an electric hydraulic pump and a hydraulic shearing and expanding device, and can be used for shearing or expanding. When a fire, a traffic accident or an earthquake disaster occurs, the expanding and pulling function of the electric hydraulic shearing and expanding pincers can be used for prying open a door, lifting or moving heavy objects, separating metal or non-metal structures, etc., and the shearing and clamping function of the electric hydraulic shearing and expanding pincers can be used for shearing steel bars, door frames, cables and automobile frames, etc., so that victims trapped in a limited environment or victims in a dangerous environment can be rescued quickly. Therefore, the electric hydraulic shearing and expanding pincers are essential breaking tools for fire departments, traffic police, industrial and mining enterprises and other rescue departments.

[0003] Since there is usually no alternating current power supply and an oil pump at a disaster site, a portable hydraulic shearing and expanding pincers with a battery and an oil storage space must be used. The hydraulic device of the portable hydraulic shearing and expanding pincers is composed of a plunger pump, hydraulic control valves and an oil cylinder, and the structure is very compact. At present, the high-pressure pump body, the low-pressure pump body and the conversion valve of the domestic product are three separate assemblies, which not only wastes space, but also increases the risk of pressure leakage and the difficulty of carrying an external oil tank. SUMMARY

[0004] The application provides an electric assault tool to solve the technical problem of the separate arrangement of the high-pressure pump body and the low-pressure pump body and the oil storage tank of the conventional electric assault tool, which wastes installation space.

[0005] To solve the above technical problem, one technical scheme of the application is as follows: an electric assault tool, comprising: a handle assembly, a plunger mechanism, a driving assembly and a pincer body assembly connected in sequence.

[0006] The handle assembly comprises an oil storage tank, and the oil storage tank is communicated with internal oil channels of the plunger mechanism and the driving assembly.

[0007] Further, the plunger mechanism comprises a hollow second connecting seat, a composite plunger pump located in the second connecting seat, a first oil inlet channel, a first oil outlet channel, a second oil inlet channel and a second oil outlet channel.

[0008] The two ends of the first oil inlet channel and the first oil outlet channel are respectively communicated with the oil storage tank and the driving assembly, and the two ends of the second oil inlet channel and the second oil outlet channel are respectively communicated with the oil storage tank and the composite plunger pump.

[0009] Further, at least one hole blocking part is arranged on the first oil inlet oil path and / or the first oil outlet oil path or the second oil inlet oil path and / or the second oil outlet oil path, the hole blocking part is not communicated with the corresponding oil path, and the hole blocking part is fixedly connected with the second connecting seat.

[0010] Further, the handle assembly further comprises a reversing valve and a first connecting seat; the first connecting seat is fixedly connected with the second connecting seat; the oil storage bin and the reversing valve are arranged in the first connecting seat, and the oil storage bin is communicated with the plunger mechanism through the reversing valve.

[0011] Further, one end of the second connecting seat is provided with an oil hole seat fixedly connected with the first connecting seat, the other end of the second connecting seat is provided with an inner groove, and the first connecting seat is provided with an eccentric shaft connected with the composite plunger pump;

[0012] The inner groove is provided with a fifth oil hole and a sixth oil hole; the oil hole seat is provided with a first oil hole, a second oil hole, a third oil hole and a fourth oil hole communicated with the reversing valve;

[0013] The first oil hole is communicated with the fifth oil hole through the first oil inlet oil path, the sixth oil hole is communicated with the second oil hole through the first oil inlet oil path, the third oil hole is communicated with the composite plunger pump through the second oil inlet oil path, and the fourth oil hole is communicated with the oil return part of the composite plunger pump through the second oil outlet oil path.

[0014] Further, the driving assembly comprises an oil cylinder fixedly connected with the second connecting seat, a driving motor located in the oil cylinder, a central oil pipe sleeved with the clamp body assembly, a third oil inlet oil path and a third oil inlet oil path;

[0015] The oil cylinder is provided with an intermediate plate, the driving motor is arranged in the oil cylinder and located on one side of the intermediate plate, and the other side of the intermediate plate is fixedly connected with the central oil pipe; the oil cylinder is further provided with a search light.

[0016] Further, the oil cylinder is provided with a seventh oil hole and an eighth oil hole; the seventh oil hole and the eighth oil hole correspond to the fifth oil hole and the sixth oil hole respectively and are communicated through an intermediate pipe;

[0017] The seventh oil hole is communicated with the front and rear sides of the intermediate plate through the third oil inlet oil path, and the eighth oil hole is communicated with the central oil pipe through the third oil inlet oil path.

[0018] Further, the plier body assembly comprises a third connecting seat, an adjustable handle, a cutter seat and a piston sleeved on the central oil pipe; the third connecting seat is externally provided with a protective shell, and a piston connecting seat of the piston is pivotally connected with a bottom hole of the cutter seat;

[0019] The third connecting seat comprises a third base fixed to the oil cylinder and two third extension parts extending non-parallelly from the third base; an outer wall of the third base is sleeved with the adjustable handle; and an axle hole at a front end of the third extension part is pivotally connected with a central hole of the cutter seat through a connecting shaft.

[0020] Further, a detachable tool head is sleeved on a surface of the cutter seat, the detachable tool head is provided with a first connecting hole and a positioning bolt, and the detachable tool head is fixed to the surface of the cutter seat through the positioning bolt;

[0021] The cutter seat is provided with a second connecting hole corresponding to the first connecting hole, and the positioning bolt is arranged in the first connecting hole and the second connecting hole.

[0022] Further, the reversing valve, the eccentric shaft, the driving motor and the shaft of the oil cylinder are located on the same horizontal line.

[0023] The application has the beneficial effects that the application sets the traditional oil storage space into the oil storage bin inside the handle, reduces the external space of the impact tool, and utilizes the mechanical mounting structure to facilitate timely inspection and supplement of the hydraulic oil. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a structural schematic diagram of an embodiment of the electric impact tool of the application;

[0026] Figure 2 is Figure 1 a structural schematic diagram of a handle component in the embodiment;

[0027] Figure 3 is Figure 1 a front view structural schematic diagram of a plunger mechanism in the embodiment;

[0028] Figure 4 is Figure 3 a sectional view structural schematic diagram of the plunger mechanism in the embodiment;

[0029] Figure 5 is Figure 3 is a schematic view of a top cross-sectional structure of the first oil inlet and the first oil outlet in the first oil pump;

[0030] Figure 6 is Figure 3 is a schematic view of a front cross-sectional structure of the first oil inlet and the first oil outlet in the first oil pump;

[0031] Figure 7 is Figure 3 is a schematic view of a structure of the composite plunger pump in the first oil pump;

[0032] Figure 8 is Figure 1 is a schematic view of an oil path cross-sectional structure of the driving assembly and the plunger mechanism in the first oil pump;

[0033] Figure 9 is Figure 8 is a schematic view of a cross-sectional structure of the third oil inlet in the first oil pump;

[0034] Figure 10 is Figure 8 is a schematic view of a cross-sectional structure of the third oil outlet in the first oil pump;

[0035] Figure 11 is Figure 8 is a schematic view of a front structure of the oil cylinder in the first oil pump;

[0036] Figure 12 is Figure 11 is a schematic view of a cross-sectional structure of the area A in the first oil pump;

[0037] Figure 13 is Figure 1 is a schematic view of a structure of the forceps body assembly in the first oil pump;

[0038] Figure 14 is Figure 13 is a schematic view of a cross-sectional structure of the forceps body assembly in the first oil pump;

[0039] Figure 15 is Figure 13 is a schematic view of a structure of the piston in the first oil pump;

[0040] Figure 16 is Figure 13 is a schematic view of a structure of the knife seat in the first oil pump;

[0041] Figure 17 is Figure 13 is a schematic view of a cross-sectional structure of the detachable tool head in the first oil pump. DETAILED DESCRIPTION

[0042] With reference to the accompanying drawings: the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] As shown in Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of the electric impact tool of the present application, which comprises a handle assembly 1, a plunger mechanism 2, a driving assembly 3 and a jaw assembly 4 connected in sequence; wherein the handle assembly 1 comprises an oil storage tank 11, which is communicated with the oil circuit inside the plunger mechanism 2 and the driving assembly 3.

[0044] The present application realizes the internal communication by setting the oil storage tank 11 inside the handle, directly connecting the composite plunger pump 23 and the oil cylinder 31 inside through the oil circuit, and saving the extra oil storage space.

[0045] As shown in Figure 2 , Figure 2 is a structural schematic diagram of the handle assembly in the present application; the handle assembly 1 comprises an oil storage tank 11, a reversing valve 13 and a first connecting seat 14; the oil storage tank 11 is provided with a handle shell 12 outside and the handle shell 12 is integrally formed with the first connecting seat 14, and the first connecting seat 14 is fixedly connected with the second connecting seat 21 of the plunger mechanism 2; the oil storage tank 11 and the reversing valve 13 are arranged in the second connecting seat 21, and the oil storage tank 11 is communicated with the plunger mechanism 2 through the reversing valve 13. The design can realize that the oil storage tank 11 is built-in inside the handle shell 12, fully uses the space of the handle, reduces the extra oil storage space, and realizes the input and output of the internal hydraulic oil of the oil storage tank 11 through the reversing valve 13.

[0046] As shown in Figures 3-6 , Figure 3 is a front view structural schematic diagram of the second connecting seat in the present application;

[0047] Figure 4 is a sectional view structural schematic diagram of the second connecting seat in the present application; Figure 5 is a top view sectional view structural schematic diagram of the first oil inlet oil circuit and the first oil outlet oil circuit in the present application; Figure 6It is a side view of the first inlet oil path and the first outlet oil path in the application. The plunger mechanism includes a hollow second connecting seat 21, a composite plunger pump 23 inside the second connecting seat, a first inlet oil path 215, a first outlet oil path 216, a second inlet oil path 217 and a second outlet oil path 218. The outer side of the second connecting seat 21 is provided with a shell 22. The two ends of the first inlet oil path 215 and the first outlet oil path 216 are respectively communicated with the oil storage warehouse 11 and the driving assembly 3. The two ends of the second inlet oil path 217 and the second outlet oil path 218 are respectively communicated with the oil storage warehouse 11 and the composite plunger pump 23. The beneficial effect is that the first inlet oil path 215, the first outlet oil path 216, the second inlet oil path 217 and the second outlet oil path 218 in the second connecting seat 21 connect the oil storage warehouse 11, the composite plunger pump and the oil cylinder 31, which is convenient for the output and return flow of the internal hydraulic oil.

[0048] Preferably, at least one hole plugging part 6 is arranged on the first inlet oil path 215 and / or the first outlet oil path 216 and / or the second inlet oil path 217 and / or the second outlet oil path 218. The hole plugging part 6 is not communicated with the corresponding oil path, and the hole plugging part 6 is fixedly connected with the second connecting seat 21. The hole plugging part 6 mainly blocks the oil hole of each oil path communicated with the outside in the manufacturing process to prevent hydraulic oil leakage, so that the hydraulic oil only passes through the internal oil path.

[0049] The second connecting seat 21 is provided with an oil hole seat 24 fixedly connected with the first connecting seat 14 at one end, and is provided with an inner groove 25 at the other end. The first connecting seat 14 is provided with an eccentric shaft 26 connected with the composite plunger pump 23. The inner groove 25 is provided with a fifth oil hole 241 and a sixth oil hole 242 at the side end. The oil hole seat 24 is provided with a first oil hole 211, a second oil hole 212, a third oil hole 213 and a fourth oil hole 214 communicated with the reversing valve 13. The design can connect the first oil hole 211, the second oil hole 212, the third oil hole 213 and the fourth oil hole 214 through the reversing valve 13 to make the hydraulic oil in the oil storage warehouse 11 flow into the internal oil path of the second connecting seat 21.

[0050] The first oil hole 211 and the fifth oil hole 241 are communicated through the first oil inlet oil way 215, the sixth oil hole 242 and the second oil hole 212 are communicated through the first oil outlet oil way 216, the third oil hole 213 and the composite plunger pump 23 are communicated through the second oil inlet oil way 217, and the fourth oil hole 214 and the oil return part of the composite plunger pump 23 are communicated through the second oil outlet oil way 218. The setting can output the hydraulic oil through the first oil hole 211 to the first oil inlet oil way 215, and then into the inside of the oil cylinder 31, and the first oil outlet oil way 216 can send the hydraulic oil backflowing from the oil cylinder 31 back to the oil storage bin 11 through the second oil hole 212. Similarly, the hydraulic oil is output through the third oil hole 213 to the second oil inlet oil way 217, and then into the inside of the composite plunger pump 23, and the second oil outlet oil way 218 can send the hydraulic oil backflowing from the composite plunger pump 23 back to the oil storage bin 11 through the fourth oil hole 214, so as to complete the circulation of the hydraulic oil.

[0051] As Figure 7 shown, Figure 7 The structure of the composite plunger pump in the application is shown in the figure, and in the embodiment, the composite plunger pump 23 includes a first plunger pump 231, a second plunger pump 232, a first flow channel, a second flow channel (not marked in the figure), a first valve body 233 and a second valve body 234. The first flow channel and the first valve body 233 are communicated with the second oil inlet oil way 217, and are used for inputting the hydraulic oil from the reversing valve 13 to the composite plunger pump 23; the second flow channel and the second valve body 234 are communicated with the second oil outlet oil way 218, and are used for outputting the hydraulic oil to the reversing valve 13. The first plunger pump 231 and the second plunger pump 232 are connected with and communicated with the shaft sleeve 321 of the eccentric shaft 26, and are used for adjusting the output oil pressure of the composite plunger pump 23. The oil pressure of the hydraulic oil is output to the first oil inlet oil way 215 or the first oil outlet oil way 216 through the reversing valve 13, so as to control the oil pressure of the whole oil way. The composite plunger pump 23 realizes the fusion of the first plunger pump 231, the second plunger pump 232, the first valve body 233 and the second valve body 234 in a small module, so that the installation space can be greatly saved, and oil leakage and pressure leakage can be avoided, and the power source can be prevented from being too bulky and having too many hidden dangers.

[0052] As Figure 8 shown, Figure 8This is a schematic diagram of the hydraulic circuit structure of the drive assembly and plunger mechanism in this application. The drive assembly 3 includes a cylinder 31 fixedly connected to the second connecting seat 21, a drive motor 32 located in the cylinder 31, a central oil pipe 33 sleeved with the clamp body assembly 4, a third oil inlet passage 313, and a third oil outlet passage 314. The cylinder 31 has an intermediate plate 34. The drive motor 32 is located within the cylinder 31 and on one side of the intermediate plate 34. The other side of the intermediate plate 34 is fixedly connected to the central oil pipe 33. The intermediate plate 34 divides the cylinder 31 into two parts. The central oil pipe 33 connected to the front end of the intermediate plate 34 is connected to the first oil inlet passage 215 via the third oil inlet passage 313, thereby connecting to the oil storage tank 11, facilitating the output of hydraulic oil pressure to the central oil pipe 33. The drive motor 32 is mainly located at the rear end of the intermediate plate 34, providing power for the flow of hydraulic oil in the cylinder 31.

[0053] Preferably, a searchlight 36 is also provided on the outside of the hydraulic cylinder 31 to provide illumination for the tools of this application during rescue operations.

[0054] like Figures 9-12 As shown, Figure 9 This is a cross-sectional schematic diagram of the third oil inlet passage in this application; Figure 10 This is a schematic cross-sectional view of the third oil outlet passage in this application; Figure 11 This is a front view structural diagram of the hydraulic cylinder of this application; Figure 12 This is a cross-sectional view of region A of the intermediate plate in this application. The rear end of the hydraulic cylinder 31 is provided with a seventh oil hole 311 and an eighth oil hole 312. The seventh oil hole 311 and the eighth oil hole 312 correspond to the fifth oil hole 241 and the sixth oil hole 242, respectively, and are connected through an intermediate pipe 35. The seventh oil hole 311 is connected to the front and rear sides of the intermediate plate 34 through a third oil inlet passage 313, and the eighth oil hole 312 is connected to the central oil pipe 33 through a third oil outlet passage 314. This arrangement allows the first oil inlet passage 215 and the corresponding third oil inlet passage 313 to be connected through the intermediate pipe 35 when the drive assembly and the plunger mechanism are connected, so that hydraulic oil flows from the first oil inlet passage 215 into the third oil inlet passage 313. Simultaneously, the first oil outlet passage 216 and the corresponding third oil outlet passage 314 are also connected through the intermediate pipe 35, so that the returning hydraulic oil flows from the third oil outlet passage 314 into the first oil outlet passage 216.

[0055] Optionally, in this embodiment, at least one plugging part 6 is provided on the third oil inlet passage 313 and / or the third oil outlet passage 314. The plugging part 6 is not connected to the corresponding oil passage. The plugging part fixes the corresponding oil passage to the oil cylinder 31 and is used to block the connection hole between the oil passage and the outside of the oil cylinder 31 to prevent hydraulic oil leakage.

[0056] In the cross section of the area A, the third oil inlet channel 313 and the third oil outlet channel 314 inside the intermediate plate 34 are not in the same plane and height. The third oil inlet channel 313 is mainly connected with the central oil pipe 33, while the third oil outlet channel 314 penetrates the front and back of the intermediate plate 34. Therefore, the two oil channels need to be staggered to prevent mutual influence.

[0057] As shown in Figures 13-16 , Figure 13 Fig. 14 is a cross-sectional structural schematic diagram of the forceps body assembly in the application; Figure 15 is a structural schematic diagram of the piston in the application; Figure 16 is a structural schematic diagram of the knife seat in the application; the forceps body assembly 4 includes a third connecting seat 41, an adjustable handle 42, a knife seat 43, and a piston 44 sleeved on the central oil pipe 33; the third connecting seat 41 is externally provided with a protective shell 45, and a piston connecting seat 441 of the piston 44 is pivotally connected with a bottom hole 431 of the knife seat 43; wherein the third connecting seat 41 includes a third base 411 fixedly connected with the oil cylinder 31 and two third extension portions 412 extending non-parallelly from the third base 411; an adjustable handle 42 is sleeved on the outer side wall of the third base 411; an axle hole 413 at the front end of the third extension portion 412 is pivotally connected with a central hole 432 of the knife seat 43 through a connecting shaft 46. The design can control the opening and closing of the knife seat 43 through the forward and backward sliding of the piston 44, so as to realize the opening and closing operation of the forceps body.

[0058] Optionally, the piston 44 is connected with a piston connecting seat 441 at the front end of the connecting rod, and a through hole (not labeled in the figure) is arranged in the piston connecting seat 441. The through hole and the bottom hole 431 of the knife seat 43 are pivotally connected through a rotating shaft, and the central hole 432 in the middle of the knife seat 43 and the axle hole 413 of the third extension portion 412 are pivotally connected through the connecting shaft 46, so that the knife seat 43 is pivotally connected with the front end of the third extension portion 412. When the piston 44 pushes the piston connecting seat 441 forward, the bottom of the knife seat 43 expands to both sides, so that the knife edge of the knife seat 43 is closed, and the forceps body is sheared; when the piston 44 pulls the piston connecting seat 441 backward, the bottom of the knife seat 43 closes to the middle, so that the knife edge of the knife seat 43 is opened, and the forceps body is expanded.

[0059] As shown in Figure 17 , Figure 17Figure 1 is a schematic diagram of the cross-sectional structure of the detachable tool head in the application; the surface of the tool seat 43 is sleeved with the detachable tool head 5, which is provided with a first through hole 51 and a positioning bolt 52; the detachable tool head 5 is fixed to the surface of the tool seat 43 through the positioning bolt 52; wherein the tool seat 43 is provided with a second through hole 433 corresponding to the first through hole 51, and the positioning bolt 52 is arranged in the first through hole 51 and the second through hole 433. This design can facilitate the quick disassembly and installation of the detachable tool head 5 from the tool seat 43 by quickly disassembling the positioning bolt 52.

[0060] Optionally, the detachable tool head 5 includes at least two tool heads with different functions, one embodiment of the tool head has a pry bar function, which is quickly installed on the tool seat 43 on both sides through the positioning bolt 52, mainly for pry operation in rescue engineering. Another embodiment of the tool head has a sharp cutting edge, which can be disassembled by removing the positioning bolt 52, and then quickly installed on the tool seat 43 for cutting operation in rescue engineering.

[0061] Wherein the reversing valve 13, the eccentric shaft 26, the drive motor 32 and the shaft of the oil cylinder 31 are located on the same horizontal line, which is convenient for operating by directly applying force to the handle during the use of the tool head.

[0062] Specific working principle, when using the emergency tool of the application, first determine whether to perform expansion or cutting operation according to the actual rescue environment, and select high pressure or low pressure mode according to the actual object, when the pliers body low pressure is needed for seam opening operation, the compound plunger pump 23 is selected to the low pressure mode, the oil pressure is adjusted, and the drive motor 32 is started, at this time, the hydraulic oil in the oil storage bin 11 flows into the first oil inlet oil way 215, the third oil inlet oil way 313 and the center oil pipe 33 through the reversing valve 13, so that the hydraulic oil pushes the piston 44 with lower pressure, and the detachable tool head 5 expands the seam with lower power; when the pliers body low pressure is needed for cutting, the hydraulic oil enters the third oil outlet oil way 314, the first oil outlet oil way 216 and the reversing valve 13 in turn, and then flows into the oil storage bin 11, thereby pulling the piston 44 to move backward, so as to control the detachable tool head 5 to close and cut with lower power. Similarly, when a larger force is needed for cutting or opening the seam, the compound plunger pump 23 can be selected to the high pressure mode, and the oil pressure is adjusted to high, at this time, the hydraulic oil pushes or pulls the piston 44 with greater power, so that the detachable tool head 5 expands and cuts with greater force, which is suitable for operation on some solid objects.

[0063] The hydraulic oil in the oil storage tank 11 of the application can be adjusted by the reversing valve 13, and the oil pressure is adjusted by the compound plunger pump 23, so that the hydraulic oil is output through the first oil inlet oil way 215 and the third oil inlet oil way 313, and is returned through the third oil outlet oil way 314 and the first oil outlet oil way 216, the expansion and shear of the tool head are completed, the compound plunger pump 23 can select appropriate power operation according to the environment of the rescue site as needed, without separately setting high-pressure and low-pressure pumps, and without external oil storage space, not only the space is saved, but also the failure rate and pressure leakage hidden danger are avoided, and the knife seat is provided with multiple tool heads, the functions are diversified, and the rescue environment is more suitable.

[0064] The above is only an embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A power-driven impact tool characterized by comprising: The utility model relates to a multifunctional surgical forceps, including: The handle assembly, plunger mechanism, drive assembly and forceps body assembly are connected in sequence; The handle assembly includes an oil storage bin, which is communicated with the plunger mechanism and the internal oil circuit of the drive assembly; The plunger mechanism includes a hollow second connecting seat, a composite plunger pump in the second connecting seat, a first oil inlet oil circuit, a first oil outlet oil circuit, a second oil inlet oil circuit and a second oil outlet oil circuit; the two ends of the first oil inlet oil circuit and the first oil outlet oil circuit are communicated with the oil storage bin and the drive assembly respectively, and the two ends of the second oil inlet oil circuit and the second oil outlet oil circuit are communicated with the oil storage bin and the composite plunger pump respectively; The handle assembly further includes a reversing valve and a first connecting seat; the first connecting seat is fixedly connected with the second connecting seat; the oil storage bin and the reversing valve are arranged in the first connecting seat, and the oil storage bin is communicated with the plunger mechanism through the reversing valve.

2. The power tool of claim 1, wherein: One end of the second connecting seat is provided with an oil hole seat fixedly connected with the first connecting seat, and the other end of the second connecting seat is provided with an inner groove; an eccentric shaft connected with the composite plunger pump is arranged in the first connecting seat; The side end of the inner groove is provided with a fifth oil hole and a sixth oil hole; the oil hole seat is provided with a first oil hole, a second oil hole, a third oil hole and a fourth oil hole communicated with the reversing valve; The first oil hole is communicated with the fifth oil hole through the first oil inlet oil circuit, the sixth oil hole is communicated with the second oil hole through the first oil outlet oil circuit, the third oil hole is communicated with the composite plunger pump through the second oil inlet oil circuit, and the fourth oil hole is communicated with the oil return part of the composite plunger pump through the second oil outlet oil circuit.

3. The power tool of claim 2, wherein: The drive assembly includes a oil cylinder fixedly connected with the second connecting seat, a drive motor arranged in the oil cylinder, a central oil pipe sleeved with the forceps body assembly, a third oil inlet oil circuit and a third oil inlet oil circuit; The oil cylinder is provided with an intermediate plate, the drive motor is arranged in the oil cylinder and located on one side of the intermediate plate, and the central oil pipe is fixedly connected to the other side of the intermediate plate; a search light is further arranged outside the oil cylinder.

4. The power tool of claim 3, wherein: The rear end of the oil cylinder is provided with a seventh oil hole and an eighth oil hole; the seventh oil hole and the eighth oil hole correspond to the fifth oil hole and the sixth oil hole respectively and are communicated through an intermediate pipe; The seventh oil hole is communicated with the front and back sides of the intermediate plate through the third oil inlet oil circuit, and the eighth oil hole is communicated with the central oil pipe through the third oil inlet oil circuit.

5. The power tool of claim 4, wherein: The forceps body assembly includes a third connecting seat, an adjustable handle, a knife seat and a piston sleeved with the central oil pipe; a piston connecting seat of the piston is pivotally connected with a bottom hole of the knife seat; The third connecting seat includes a third base fixedly connected with the oil cylinder and two third extension parts non-parallelly extended from the third base; an adjustable handle is sleeved on the outer side wall of the third base; a shaft hole at the front end of the third extension part is pivotally connected with a central hole of the knife seat through a connecting shaft.

6. The power tool of claim 5, wherein: The tool head is detachably sleeved on the tool seat surface, and is provided with a first through hole and a positioning bolt. The tool seat is provided with a second through hole corresponding to the first through hole, and the positioning bolt is arranged in the first through hole and the second through hole.

7. The power tool of claim 4, wherein: The reversing valve, the eccentric shaft, the driving motor and the shaft of the oil cylinder are located on the same horizontal line.

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