Handheld nut breaking and cutting device

Abstract

The utility model relates to a handheld nut splitter which comprises a cutter mechanism, a telescopic mechanism, a pressurizing mechanism, a pressure relief mechanism and a hydraulic mechanism. The pressurizing mechanism is used for pumping and injecting hydraulic oil in the hydraulic mechanism into a pressurizing oil cavity of the telescopic mechanism; the cutter mechanism comprises a movable cutter, the telescopic mechanism comprises a telescopic piston arranged at the front end of the pressurizing oil cavity, and the telescopic piston is used for driving the movable cutter to extend forwards to break and cut the nut under the thrust action of the pressurizing oil cavity; the pressure relief mechanism is used for relieving pressure of the hydraulic oil in the pressurizing oil cavity and discharging the hydraulic oil back to the hydraulic mechanism, and meanwhile the telescopic piston retracts and resets. According to the handheld nut breaking and cutting device, the dependence of equipment on an external hydraulic pump station can be reduced, and the individual handheld operation requirement of the nut breaking and cutting device is met through different integrated mechanisms.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nut breaking tools, in particular to a handheld nut breaking cutter. BACKGROUND

[0002] At present, most of the nut breakers for steel rails on the market are manual hydraulic type and automatic hydraulic type.

[0003] The manual hydraulic type is locked by a locking head, and a single hydraulic pump rod is repeatedly pressed down to pressurize, the whole operation is manual, the pressurizing speed is slow, the labor amount is large, and the operation process is slow, especially when the operation is carried out through a skylight, the working efficiency is seriously affected.

[0004] The automatic hydraulic type can well make up for the deficiency of the manual type, the automatic hydraulic pump can quickly realize system pressurization, and the working efficiency is greatly improved, but the locking head needs to be connected with a hydraulic pump station, and most of the hydraulic pump stations are large in weight and volume, which is extremely cumbersome during carrying and operation, and a person needs to assist to successfully complete the operation. CONTENT OF THE INVENTION

[0005] The application aims to provide a handheld nut breaking cutter, which can greatly increase the convenience of the nut breaker on the basis of successfully completing the nut breaking operation.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a handheld nut breaking cutter, which comprises a cutter mechanism, a telescopic mechanism, a pressurizing mechanism, a pressure relief mechanism and a hydraulic mechanism.

[0007] The pressurizing mechanism is used for sucking and pressurizing the hydraulic oil in the hydraulic mechanism into the pressurizing oil cavity of the telescopic mechanism.

[0008] The cutter mechanism comprises a movable cutter, the telescopic mechanism comprises a telescopic piston arranged at the front end of the pressurizing oil cavity, and the telescopic piston is used for driving the movable cutter to protrude forward to break and cut the nut under the thrust action of the pressurizing oil cavity.

[0009] The pressure relief mechanism is used for relieving the pressure of the hydraulic oil in the pressurizing oil cavity and returning the hydraulic oil to the hydraulic mechanism, and simultaneously makes the telescopic piston retract and reset.

[0010] In an optional embodiment, the cutter mechanism comprises a cutter end sleeve, a splash-proof baffle is arranged on the cutter end sleeve, the splash-proof baffle is connected to the cutting square groove of the cutter end sleeve in an openable and closable mode, and the connection parts are mutually engaged through a rack;

[0011] The inside of the cutter end sleeve is provided with a fixed cutter at the front end, and the movable cutter is movably arranged on the other side of the fixed cutter relative to the cutting square groove.

[0012] In an optional embodiment, the telescopic mechanism includes a transmission sleeve, the pressurized oil chamber is disposed inside the transmission sleeve, the telescopic piston includes a pressure-relieving piston disposed inside the transmission sleeve, the pressure-relieving piston is located in front of the pressurized oil chamber, and the movable cutter is connected to the pressure-relieving piston through a cutter moving shaft.

[0013] In an optional embodiment, the cutter moving shaft is disposed on the front side of the pressure-relieving piston, and a cutter reset spring is disposed on the outside of the cutter moving shaft;

[0014] The front end of the cutter reset spring abuts against the front end of the transmission sleeve, and the rear end abuts against the pressure-relieving piston.

[0015] In an optional embodiment, a base is provided on the rear side of the transmission sleeve, a pressurized oil chamber is provided inside the base, and an oil supply channel is provided between the pressurized oil chamber and the pressurized oil chamber.

[0016] The hydraulic mechanism includes a hydraulic oil tank connected to the rear end of the machine base, and an oil filling channel is provided between the hydraulic oil tank and the pressurized oil chamber;

[0017] The pressurized oil chamber is equipped with an oil-filling piston that can move up and down reciprocally.

[0018] In an optional embodiment, the oil-filled piston is connected to an oil-filled piston rod capable of moving it up and down, and the pressurizing mechanism includes a pressurizing motor and an eccentric assembly connected to the output end of the pressurizing motor, the eccentric assembly being disposed at the bottom of the oil-filled piston rod.

[0019] In an optional embodiment, the eccentric assembly includes a turntable connected to the output end of the pressurizing motor, an abutment wheel connected to the front side of the turntable, the abutment wheel being disposed directly below the oil-filling piston rod and eccentrically disposed with respect to the turntable, and a piston rod reset spring being vertically disposed in the pressurizing oil chamber.

[0020] The top end of the piston rod return spring abuts against the top of the pressurized oil chamber, and the bottom end abuts against the oil-filled piston.

[0021] In an optional embodiment, a limiting shaft is provided on the front end face of the abutting wheel, the limiting shaft is concentrically arranged with the turntable, an abutting bearing is provided on the outer side of the abutting wheel, the abutting bearing abuts against the bottom end of the oil-filled piston rod, and a fixed bearing is provided on the outer side of the limiting shaft, the fixed bearing is installed on the housing on the front side of the pressurizing motor.

[0022] In an optional embodiment, a one-way valve is provided on the oil filling channel. The one-way valve is used to unidirectionally transport hydraulic oil from the hydraulic oil tank into the pressurized oil chamber during the suction of the oil filling piston as it moves up and down.

[0023] In an optional embodiment, the pressure relief mechanism includes an oil drain channel disposed between the pressurized oil chamber and the hydraulic oil tank, an oil sealing pin disposed on the oil drain channel, and a pin spring disposed on the oil sealing pin;

[0024] The housing is equipped with a pressure relief switch, which is connected to a pressure relief lever. The end of the oil sealing pin is engaged with the pressure relief lever, and the pressure relief lever can lift the oil sealing pin when the pressure relief switch is pressed.

[0025] By setting different mechanisms, it is possible to cut waste nuts with a simple structure, while also meeting the extension and retraction requirements of the cutter and improving work efficiency.

[0026] The pressurizing mechanism is used to draw hydraulic oil from the hydraulic mechanism and inject it into the pressurizing oil chamber of the telescopic mechanism. The pushing pressure of the pressurizing oil chamber causes the telescopic mechanism to drive the moving cutter of the cutting mechanism to push forward and cut. The telescopic piston can drive the moving cutter to extend forward and cut the nut under the thrust of the pressurizing oil chamber.

[0027] The pressure relief mechanism can release the hydraulic oil in the pressurized oil chamber back to the hydraulic mechanism, and at the same time, it can retract the telescopic piston to its initial state, so that the cutting cycle can be performed again.

[0028] The handheld nut breaker of this invention reduces the equipment's reliance on an external hydraulic pump station and meets individual handheld operation needs by integrating different mechanisms.

[0029] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the external structure of the handheld nut cutter in this application;

[0032] Figure 2 This is a schematic diagram of the external structure of the cutting mechanism;

[0033] Figure 3 This is a cross-sectional view of the cutting mechanism.

[0034] Figure 4 A cross-sectional view of a handheld nut cutter;

[0035] Figure 5 This is a schematic diagram of the eccentric component.

[0036] Figure 6 This is a schematic diagram of the pressure relief mechanism.

[0037] icon:

[0038] 1-Cutter end sleeve; 11-Moving cutter; 12-Splash guard; 13-Cutting square groove; 14-Fixed cutter;

[0039] 2-Transmission sleeve; 21-Pressurized oil chamber; 22-Pressure charging / discharging piston; 23-Cutter moving shaft; 24-Cutter reset spring;

[0040] 3-Base; 31-Pressurized oil chamber; 32-Oil filling channel; 33-Oil filling piston; 34-Oil filling piston rod; 35-Piston rod return spring;

[0041] 4-Hydraulic oil tank; 41-Oil drain channel; 42-Oil sealing pin; 43-Pin spring;

[0042] 5-Pressure motor; 51-Turntable; 52-Abutting wheel; 53-Limiting shaft; 54-Abutting bearing; 55-Fixed bearing; 56-Pressure switch;

[0043] 6-Housing; 61-Pressure relief switch; 62-Pressure relief lever. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0045] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] The handheld nut cutter of this invention is mainly used for rail replacement operations. It is suitable for disassembling nuts that are rusted, seized, or have damaged threads in harsh environments, such as high-temperature or corrosive environments. The handheld nut cutter can achieve simple, quick, safe, and efficient disassembly and replacement without fire or electricity, without damaging the bolt threads.

[0048] See Figure 1 The handheld nut cutter of this utility model includes: a cutting mechanism, a telescopic mechanism, a pressurizing mechanism, a pressure relief mechanism, and a hydraulic mechanism;

[0049] The pressurizing mechanism is used to draw hydraulic oil from the hydraulic mechanism and inject it into the pressurizing oil chamber 21 of the telescopic mechanism;

[0050] The cutting mechanism includes a movable cutting blade 11, and the telescopic mechanism includes a telescopic piston disposed at the front end of the pressurized oil chamber 21. The telescopic piston is used to drive the movable cutting blade 11 to extend forward under the thrust of the pressurized oil chamber 21 to cut the nut.

[0051] The pressure relief mechanism is used to release the hydraulic oil in the pressurized oil chamber 21 back to the hydraulic mechanism, and at the same time, to retract and reset the telescopic piston.

[0052] In one specific embodiment, the cutting mechanism includes a cutting end sleeve 1, on which a splash guard 12 is provided. The splash guard 12 is detachably connected to the cutting groove 13 of the cutting end sleeve 1. Specifically, see [link to relevant documentation]. Figure 2The splash guard 12 includes two oppositely arranged plates, which are installed on the locking head of the cutter. The connecting parts of the two splash guards 12 are meshed with each other through a rack and pinion, and can be opened and closed synchronously.

[0053] By adding a splash-proof structure to the locking head, the nut can be effectively prevented from flying out and injuring people when the nut breaks, thus enhancing safety.

[0054] Combination Figure 3 A cross-sectional view of the cutting mechanism shows that a fixed cutter 14 is located at the front end inside the cutter end sleeve 1, and the fixed cutter 14 is locked in place by bolts.

[0055] The movable cutter 11 is movably mounted on the opposite side of the fixed cutter 14 relative to the cutting groove 13, and is connected to the cutter moving shaft 23. The cutter moving shaft 23 is mainly used to push the movable cutter 11 to achieve forward or backward movement. During operation, the nut axis is placed parallel to the cutter tip in the cutting groove 13 of the cutter end sleeve 1, with one side pressed against the fixed cutter 14. After pressure is applied, the movable cutter 11 on the other side of the cutting groove 13 moves forward, pressing the nut against the fixed cutter 14 until the nut breaks along its axial direction. After decompression, the broken nut can be removed to complete the nut breaking operation.

[0056] Combination Figure 4 The schematic diagram of the cross-sectional structure of the handheld nut cutter shows that the telescopic mechanism includes a transmission sleeve 2, a pressurized oil chamber 21 is located inside the transmission sleeve 2, and the telescopic piston specifically includes a pressure-relieving piston 22 located inside the transmission sleeve 2. The pressure-relieving piston 22 is located in front of the pressurized oil chamber 21, and the movable cutter 11 is connected to the pressure-relieving piston 22 through the cutter moving shaft 23.

[0057] The pressure-increasing piston 22 mainly functions to pressurize and advance as well as to depressurize and reset, while driving the cutter moving shaft 23 and the moving cutter 11 to reciprocate in the front-back direction.

[0058] When the pressurized oil chamber 21 is pressurized, it compresses the pressure-relieving piston 22 located in front of it to move forward, while simultaneously driving the cutter moving shaft 23 and the moving cutter 11 forward to achieve the cutting action.

[0059] The retraction and reset process during reciprocating movement is specifically carried out by the cutter reset spring 24. Specifically, the cutter moving shaft 23 is located in front of the pressure-releasing piston 22, and the cutter reset spring 24 is provided on the outside of the cutter moving shaft 23.

[0060] The front end of the cutter reset spring 24 is fixedly abutted against the front end of the transmission sleeve 2, and the rear end of the cutter reset spring 24 abuts against the pressure-relieving piston 22, specifically the rear end abuts against the front side wall of the pressure-relieving piston 22.

[0061] When the pressure relief mechanism is used to relieve the pressure in the pressurized oil chamber 21, the pressurized oil chamber 21 loses the pressure to push, and the cutter reset spring 24 can drive the cutter moving shaft 23 and the moving cutter 11 to retract and reset.

[0062] In terms of specific structural composition, a base 3 is provided on the rear side of the transmission sleeve 2, and a pressurized oil chamber 31 is provided inside the base 3. An oil supply channel is provided between the pressurized oil chamber 31 and the pressurized oil chamber 21.

[0063] The hydraulic mechanism includes a hydraulic oil tank 4 connected to the rear end of the base 3. An oil filling channel 32 is provided between the hydraulic oil tank 4 and the pressurized oil chamber 31. An oil filling piston 33 capable of reciprocating up and down is provided in the pressurized oil chamber 31.

[0064] The oil-filled piston 33 is connected to an oil-filled piston rod 34 that can drive it to move up and down. The pressurization mechanism includes a pressurization motor 5 and an eccentric component connected to the output end of the pressurization motor 5. The eccentric component is located at the bottom of the oil-filled piston rod 34.

[0065] During the pressurization process, hydraulic oil is drawn in and pressurized by the reciprocating movement of the filling piston 33. During the drawing process, the hydraulic oil enters the pressurizing oil chamber 31 from the hydraulic oil tank 4 through the filling channel 32 as the filling piston 33 moves downward. Then, as the filling piston 33 moves upward, the pressurizing oil chamber 31 supplies hydraulic oil into the pressurizing oil chamber 21 through the oil supply channel, gradually pressurizing the pressurizing oil chamber 21. This pressurizing oil chamber 21 then pushes the pressure relief piston 22 forward, further propelling the moving cutter 11 to perform a cutting force.

[0066] Combination Figure 4 ,as well as Figure 5 The schematic diagram of the eccentric component shows that the oil-filled piston 33 is connected to an oil-filled piston rod 34 that can drive it to move up and down. The pressurizing mechanism includes a pressurizing motor 5 and an eccentric component connected to the output end of the pressurizing motor 5. The eccentric component is located at the bottom of the oil-filled piston rod 34.

[0067] The eccentric assembly includes a turntable 51 connected to the output end of the pressurizing motor 5. An abutment wheel 52 is connected to the front side of the turntable 51. The abutment wheel 52 is located directly below the oil-filling piston rod 34 and is eccentrically positioned with respect to the turntable 51. A piston rod return spring 35 is vertically arranged in the pressurizing oil chamber 31. The top end of the piston rod return spring 35 abuts against the top of the pressurizing oil chamber 31, and the bottom end abuts against the oil-filling piston 33.

[0068] Furthermore, a limiting shaft 53 is provided on the front end face of the abutment wheel 52. The limiting shaft 53 is concentrically arranged with the turntable 51. An abutment bearing 54 is provided on the outer side of the abutment wheel 52. The abutment bearing 54 abuts against the bottom end of the oil-filled piston rod 34. A fixed bearing 55 is provided on the outer side of the limiting shaft 53. The fixed bearing 55 is installed on the housing 6 on the front side of the pressurizing motor 5.

[0069] The pressurization process mainly includes the following steps: after the motor starts, the abutment bearing 54 rotates eccentrically relative to the output shaft of the pressurization motor 5 under the drive of the abutment wheel 52. After the pressurization switch 56 is pressed, the motor starts. Every time the output shaft of the pressurization motor 5 rotates once, the abutment bearing 54 will press the oil-filled piston rod 34 at the bottom of the oil-filled piston rod 34 once. The oil-filled piston rod 34 and the oil-filled piston 33 move upward. When the abutment bearing 54 leaves the oil-filled piston rod 34, the oil-filled piston rod 34 will be bounced back to its original position by the piston rod return spring 35 and move downward. Thus, the oil-filled piston 33 completes one extension and retraction action, which pressurizes and fills the hydraulic oil from the hydraulic oil tank 4 into the pressurization oil chamber 21, pushing the pressure-releasing piston 22 forward, thereby pushing the cutter.

[0070] In order to ensure that hydraulic oil can be unidirectionally transported from the hydraulic oil tank 4 to the pressurized oil chamber 31 during the extension and retraction of the oil-filled piston 33, a one-way valve (not shown in the figure) is provided on the oil filling channel 32. The one-way valve is used to ensure the unidirectional output of hydraulic oil during the suction of the oil-filled piston 33 during its up-and-down reciprocating movement.

[0071] See Figure 6 A schematic diagram of the pressure relief mechanism. The pressure relief mechanism includes an oil drain channel 41 disposed between the pressurized oil chamber 21 and the hydraulic oil tank 4. An oil sealing pin 42 is disposed on the oil drain channel 41, and a pin spring 43 is disposed on the oil sealing pin 42.

[0072] A pressure relief switch 61 is provided on the housing 6. The pressure relief switch 61 is connected to a pressure relief lever 62. The end of the oil sealing pin 42 is engaged with the pressure relief lever 62. Under the pressing action of the pressure relief switch 61, the pressure relief lever 62 can lift the oil sealing pin 42, so that the oil sealing pin 42 avoids blocking the oil drain channel 41.

[0073] Specifically, a compression spring 43 is installed on the outer clamp of the oil sealing pin 42. The pin spring 43 is limited and installed in the pressure relief groove. When there is no operation, the pin spring 43 always presses the oil sealing pin 42 inward, so that the oil sealing pin 42 seals the oil leakage channel 41 and prevents leakage into the pressurized oil chamber 21.

[0074] When the pressure relief switch 61 is pressed, the long swing end of the pressure relief lever 62 is pressed down. Since the center of the pressure relief lever 62 is fixed and rotatable, its short swing end will be raised. The outer end of the sealing pin 42 is locked with the short swing end of the pressure relief lever 62, so the sealing pin 42 will be pulled up. The oil drain channel 41 is connected to the hydraulic oil tank 4. With the help of the pressure difference between the pressurized oil chamber 21 and the hydraulic oil tank 4 and the elastic force of the cutter reset spring 24, the hydraulic oil in the pressurized oil chamber 21 is depressurized and discharged back to the hydraulic oil tank 4, thereby realizing the pressure relief operation.

[0075] The pressure motor 5 is a DC motor powered by a lithium battery. This DC motor drives the hydraulic mechanism's pressurization operation and, in conjunction with the pressure relief mechanism, completes the clamping or releasing action of the cutter. The overall design features a pistol-style casing, conforming to ergonomic principles.

[0076] The handheld nut splitter of this invention breaks through the limitations of traditional splitters, which are large in size and weight and cumbersome in operation. It uses a small DC motor to provide power and combines it with a hydraulic mechanism, which greatly reduces the overall size and weight of the equipment and optimizes the operation. The work can be completed by pressing only two buttons.

[0077] The overall weight and structure are similar to ordinary electric drills, allowing one person to operate one machine, which greatly reduces labor intensity and saves labor. The overall structure is more compact and precise, and the anti-splash mechanism increases the safety and stability of the equipment, ensuring the personal safety of the operator.

[0078] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0079] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A handheld nut cutter, characterized in that, include: Cutting mechanism, telescopic mechanism, pressurizing mechanism, pressure relief mechanism, and hydraulic mechanism; The pressurizing mechanism is used to draw hydraulic oil from the hydraulic mechanism and inject it into the pressurizing oil chamber of the telescopic mechanism; The cutting mechanism includes a movable cutting blade, and the telescopic mechanism includes a telescopic piston disposed at the front end of the pressurized oil chamber. The telescopic piston is used to drive the movable cutting blade to extend forward under the thrust of the pressurized oil chamber to cut the nut. The pressure relief mechanism is used to release the hydraulic oil in the pressurized oil chamber back to the hydraulic mechanism, while simultaneously causing the telescopic piston to retract and reset.

2. The handheld nut cutter according to claim 1, characterized in that, The cutting mechanism includes a cutting end sleeve, on which a splash guard is provided. The splash guard is detachably connected to the cutting square groove of the cutting end sleeve and meshes with each other through a rack at the connection point. The cutter end sleeve is provided with a fixed cutter located at the front end, and the movable cutter is movably disposed on the other side of the fixed cutter opposite to the cutting groove.

3. The handheld nut cutter according to claim 1, characterized in that, The telescopic mechanism includes a transmission sleeve, the pressurized oil chamber is disposed inside the transmission sleeve, the telescopic piston includes a pressure-relieving piston disposed inside the transmission sleeve, the pressure-relieving piston is located in front of the pressurized oil chamber, and the movable cutter is connected to the pressure-relieving piston through a cutter moving shaft.

4. The handheld nut cutter according to claim 3, characterized in that, The cutter moving shaft is located on the front side of the pressure-relieving piston, and a cutter return spring is provided on the outside of the cutter moving shaft; The front end of the cutter reset spring abuts against the front end of the transmission sleeve, and the rear end abuts against the pressure-relieving piston.

5. The handheld nut cutter according to claim 3, characterized in that, A base is provided on the rear side of the transmission sleeve, and a pressurized oil chamber is provided inside the base. An oil supply channel is provided between the pressurized oil chamber and the pressurized oil chamber. The hydraulic mechanism includes a hydraulic oil tank connected to the rear end of the machine base, and an oil filling channel is provided between the hydraulic oil tank and the pressurized oil chamber; The pressurized oil chamber is equipped with an oil-filling piston that can move up and down reciprocally.

6. The handheld nut cutter according to claim 5, characterized in that, The oil-filled piston is connected to an oil-filled piston rod that can drive it to move up and down. The pressurizing mechanism includes a pressurizing motor and an eccentric assembly connected to the output end of the pressurizing motor. The eccentric assembly is located at the bottom of the oil-filled piston rod.

7. The handheld nut cutter according to claim 6, characterized in that, The eccentric assembly includes a turntable connected to the output end of the pressurizing motor. A stop wheel is connected to the front side of the turntable. The stop wheel is located directly below the oil-filling piston rod and is eccentrically positioned with respect to the turntable. A piston rod return spring is vertically arranged in the pressurizing oil chamber. The top end of the piston rod return spring abuts against the top of the pressurized oil chamber, and the bottom end abuts against the oil-filled piston.

8. The handheld nut cutter according to claim 7, characterized in that, A limiting shaft is provided on the front end face of the abutting wheel. The limiting shaft is concentrically arranged with the turntable. An abutting bearing is provided on the outer side of the abutting wheel. The abutting bearing abuts against the bottom end of the oil-filled piston rod. A fixed bearing is provided on the outer side of the limiting shaft. The fixed bearing is installed on the housing on the front side of the pressurizing motor.

9. The handheld nut cutter according to claim 7, characterized in that, A one-way valve is provided on the oil filling channel. The one-way valve is used to unidirectionally transport hydraulic oil from the hydraulic oil tank into the pressurized oil chamber during the suction of the oil filling piston as it moves up and down.

10. The handheld nut cutter according to claim 8, characterized in that, The pressure relief mechanism includes an oil drain channel disposed between the pressurized oil chamber and the hydraulic oil tank, an oil sealing pin disposed on the oil drain channel, and a pin spring disposed on the oil sealing pin; The housing is equipped with a pressure relief switch, which is connected to a pressure relief lever. The end of the oil sealing pin is engaged with the pressure relief lever, and the pressure relief lever can lift the oil sealing pin when the pressure relief switch is pressed.

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