Electrically powered hydraulic impulse assembly tool

Abstract

The application discloses an electric oil pressure pulse type assembly tool, which comprises a motor and an oil pressure pulse assembly provided with a striking shaft; the motor, the oil pressure pulse assembly and the striking shaft are arranged in a shell; the shell is further provided with a detector I for monitoring the rotating speed of an output shaft, a detector II for monitoring the striking number of the striking shaft and a controller connected with the detector I, the detector II and the motor; the controller automatically stops the motor when the pulse number reaches a set value; the pulse number is the acceleration fluctuation number obtained based on the rotating speed and the striking number. The electric oil pressure pulse type assembly tool utilizes the motor to drive the oil pressure pulse assembly to output torque outward; the oil pressure pulse assembly has stable power transmission characteristics; the detector I, the detector II and the controller can accurately monitor the output shaft and the striking shaft and feed back the start and stop of the motor; the fixed torque function is realized on the basis of the oil pressure pulse assembly; the output torque is accurately controlled; and the working performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric tools, in particular to an electric oil pressure pulse assembly tool. BACKGROUND

[0002] The electric screwdriver is an electric tool which can convert kinetic energy generated by the rotation of the electric motor into deformation energy of the threaded coupling in the external world, and is used for tightening and disassembling the threaded coupling, and can be widely applied to the household appliance, automobile, motorcycle and other industries.

[0003] In order to guarantee the assembly quality of the product, the operator often needs to make the electric screwdriver complete the installation of the threaded coupling in the product at a specific torque, in other words, the electric screwdriver with the fixed torque function can guarantee the installation effect of the threaded coupling in the product, and further guarantee the assembly quality of the product.

[0004] In the current common electric screwdriver, although some electric screwdrivers can realize the fixed torque, the torque transmission accuracy and detection accuracy are relatively low, so the fixed torque control effect of such electric screwdrivers is general, and there is a large error between the actual torque of the tool to the threaded coupling and the expected torque of the operator, which not only affects the assembly quality of the product and the threaded coupling, but also is not conducive to the service life and safety of the electric screwdriver itself. SUMMARY

[0005] The purpose of the present application is to provide an electric oil pressure pulse assembly tool which can realize the fixed torque with high output torque accuracy.

[0006] In order to achieve the above purpose, the present application provides an electric oil pressure pulse assembly tool, comprising a motor and an oil pressure pulse assembly provided with a striking shaft; the motor, the oil pressure pulse assembly and the striking shaft are all arranged in a housing; the housing is further provided with:

[0007] a detector I which is adjacent to the output shaft of the motor and is used for monitoring the rotating speed of the output shaft;

[0008] a detector II which is adjacent to the striking shaft and is used for monitoring the striking number of the striking shaft;

[0009] a controller which is connected with the detector I, the detector II and the motor; the controller automatically stops the motor when the pulse number reaches a set value; the pulse number is the acceleration fluctuation number which is obtained based on the rotating speed and the striking number.

[0010] Preferably, the detector I comprises a magnetic inductor and an encoder.

[0011] Preferably, the oil pressure pulse assembly comprises an impact frame connected with the output shaft; a connector is arranged between the impact frame and the output shaft; the impact frame and the connector are both in the shape of a sleeve;

[0012] The connector comprises a first joint and a second joint respectively arranged at the two axial ends; the first joint is sleeved and tightly fitted on the output shaft; the second joint is sleeved and tightly fitted on the impact frame.

[0013] Preferably, a threaded fitting surface is arranged between the first joint and the output shaft.

[0014] Preferably, the output shaft comprises a shaft section I and a shaft section II; the shaft section I is connected with a driving member in the motor through the shaft section II; the diameter of the shaft section I is smaller than that of the shaft section II; the threaded fitting surface is arranged between the first joint and the shaft section II; the shaft section I is fitted with a mounting hole in the connector.

[0015] Preferably, the second joint comprises a sleeve and a plurality of locking screws arranged around the sleeve; any one of the locking screws is arranged along the radial direction of the sleeve and locks the sleeve and the impact frame.

[0016] Preferably, the impact frame comprises a working section with a sealed oil cavity arranged inside and a connecting section with a plurality of positioning blind holes arranged around the side surface; the sleeve is sleeved on the connecting section; all the locking screws are correspondingly arranged in the positioning blind holes.

[0017] Preferably, the outer diameter of the connecting section is larger than that of the first joint; the outer diameter of the working section is equal to that of the sleeve.

[0018] Preferably, the axial end surface of the impact frame is provided with a central blind hole; the shaft end of the output shaft is inserted into and fitted with a shaft hole in the central blind hole; the impact frame, the central blind hole, the connector and the output shaft are coaxially arranged.

[0019] Preferably, the oil pressure pulse assembly comprises an impact frame, a camshaft and the striking shaft; the striking shaft tail of the striking shaft and the camshaft are coaxially arranged in a sealed oil cavity in the impact frame; an oil pressure mover is arranged in the sealed oil cavity and moves along the radial direction of the camshaft; the oil pressure mover defines two pulse oil cavities between the sealed oil cavity and the striking shaft tail; the two pulse oil cavities are located on both sides of the moving direction of any one of the oil pressure movers; the two pulse oil cavities are communicated through an overflow hole; the impact frame periodically presses the oil pressure mover to drive the oil to flow between the two pulse oil cavities when rotating, thereby driving the striking shaft to output pulse torque outward.

[0020] The electric oil pressure pulse assembly tool provided by the present application comprises a motor and an oil pressure pulse assembly provided with a striking shaft; the motor, the oil pressure pulse assembly and the striking shaft are arranged in a shell; and the shell is further provided with:

[0021] a detector I close to the output shaft of the motor for monitoring the rotating speed of the output shaft;

[0022] a detector II close to the striking shaft for monitoring the striking number of the striking shaft;

[0023] a controller connected with the detector I, the detector II and the motor; the controller automatically stops the motor when the pulse number reaches a set value; the pulse number is the acceleration fluctuation number based on the rotating speed and the striking number.

[0024] The electric oil pressure pulse assembly tool utilizes the motor to drive the oil pressure pulse assembly to output torque outward, so as to screw the workpiece. On the basis of good stability of the oil pressure pulse assembly, the electric oil pressure pulse assembly tool realizes the functions of fixed torque and automatic power-off by monitoring the output shaft and the striking shaft to feedback control the start and stop of the motor, so as to more accurately control the output torque and improve the working performance of the electric oil pressure pulse assembly tool. The specific structure and function of the oil pressure pulse assembly can refer to the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0026] Figure 1 The structural schematic diagram of the electric oil pressure pulse assembly tool provided by the embodiment of the present application;

[0027] Figure 2 The partial structural schematic diagram of the electric oil pressure pulse assembly tool provided by the embodiment of the present application at the oil pressure pulse assembly and the connector;

[0028] Figure 3 The structural schematic diagram of the electric oil pressure pulse assembly tool provided by the embodiment of the present application at the PCB. Figure 1 The sectional view along the direction of A-A;

[0029] Figure 4 The sectional view along the direction of B-B; Figure 1 The sectional view along the direction of B-B;

[0030] Figure 5 The structural schematic diagram of the electric oil pressure pulse assembly tool provided by the embodiment of the present application at the PCB.

[0031] Wherein, 1-motor, 11-output shaft, 3-oil pressure pulse assembly, 31-impact frame, 310-working section, 311-connecting section, 32-camshaft, 33-hitting shaft, 34-oil pressure block, 4-housing, 5-connector, 51-first joint, 52-second joint, 521-sleeve, 522-locking screw, 6-illumination lamp, 7-forward and reverse touch switch, 8-switch, 9-battery, 10-PCB. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0034] Please refer to Figures 1 to 5 , Figure 1 The structural schematic diagram of the electric oil pressure pulse type assembly tool provided by the embodiments of the present application; Figure 2 The partial structural schematic diagram of the electric oil pressure pulse type assembly tool provided by the embodiments of the present application at the oil pressure pulse assembly and the connector; Figure 3 The structural schematic diagram of the electric oil pressure pulse type assembly tool provided by the embodiments of the present application along the A-A direction; Figure 1 The structural schematic diagram of the electric oil pressure pulse type assembly tool provided by the embodiments of the present application along the B-B direction; Figure 4 The structural schematic diagram of the electric oil pressure pulse type assembly tool provided by the embodiments of the present application at the PCB. Figure 1 Figure 5 The present application provides an electric oil pressure pulse type assembly tool, which comprises a motor 1, an oil pressure pulse assembly 3 and a housing 4; the oil pressure pulse assembly 3 comprises a hitting shaft 33, which is used to connect external workpieces such as threaded couplings; the motor 1 has an output shaft 11, which is connected to the oil pressure pulse assembly 3 and used to provide power to the oil pressure pulse assembly 3.

[0035] The present application provides an electric oil pressure pulse type assembly tool, which comprises a motor 1, an oil pressure pulse assembly 3 and a housing 4; the oil pressure pulse assembly 3 comprises a hitting shaft 33, which is used to connect external workpieces such as threaded couplings; the motor 1 has an output shaft 11, which is connected to the oil pressure pulse assembly 3 and used to provide power to the oil pressure pulse assembly 3.

[0036] ​The motor 1 is arranged in the housing 4, the striking shaft 33 includes a striking shaft head for connecting a workpiece, and the rest of the oil pressure pulse assembly 3 except the striking shaft head is arranged in the housing 4. In addition, the housing 4 is provided with a detector I for detecting the rotating speed of the output shaft 11, a detector II for monitoring the striking number of the striking shaft 33, and a controller connected with the detectors I and II and the motor 1, which automatically stops the motor 1 when the pulse number reaches a preset value.

[0037] The pulse number refers to the acceleration fluctuation number obtained by analyzing the rotating speed obtained by the detector I and the striking number obtained by the detector II. In other words, the electric oil pressure pulse assembly tool can calibrate the corresponding relationship between the output torque of the striking shaft 33 and the preset torque value based on the acceleration transformation of the striking shaft 33, so as to determine whether the output torque of the striking shaft 33 reaches the preset torque value.

[0038] The electric oil pressure pulse assembly tool drives the oil pressure pulse assembly 3 to output torque outward by the motor 1, so as to screw the workpiece. On the basis of good stability of the oil pressure pulse assembly 3, the electric oil pressure pulse assembly tool realizes the functions of constant torque and automatic power-off by monitoring the output shaft 11 and the striking shaft 33 to feedback control the start and stop of the motor 1, so as to more accurately control the output torque and improve the working performance of the electric oil pressure pulse assembly tool. The specific structure and function of the oil pressure pulse assembly 3 can refer to the prior art.

[0039] The electric oil pressure pulse assembly tool provided by the application will be further described in combination with the drawings and embodiments.

[0040] In the electric oil pressure pulse assembly tool provided by the application, the detectors I and II can realize the respective monitoring functions by using a magnetic inductor and an encoder. Taking the detector I as an example, the detector I includes a magnetic inductor and an encoder, the encoder processes the signal obtained by the magnetic inductor and provides an "ABZ" signal which can be used to describe the rotating state of the output shaft 11 to the controller such as a PCB 10.

[0041] According to the rotating speed of the output shaft 11 and the striking number of the striking shaft 33 provided by the detectors I and II, the controller can analyze and calculate the acceleration data of the oil pressure pulse assembly 3 and the acceleration fluctuation number in the acceleration data.

[0042] Further, the oil pressure pulse assembly 3 includes an impact frame 31, and the electric oil pressure pulse assembly tool further includes a connector 5 arranged between the impact frame 31 and the output shaft 11.

[0043] The impact frame 31 is assembled on the outer periphery of the rest of the components of the oil pressure pulse assembly 3, so as to integrate all the components of the oil pressure pulse assembly 3 into an assembly. Of course, for the impact shaft 33 of the oil pressure pulse assembly 3, the impact frame 31 is arranged on the outer periphery of the rest of the impact shaft 33 except the impact shaft head, for example, the impact shaft 33 includes an impact shaft head, an impact shaft middle part and an impact shaft tail part, and the impact frame 31 is arranged on the outer periphery of the impact shaft middle part and the impact shaft tail part.

[0044] Both the impact frame 31 and the connector 5 are sleeve-shaped. The connector 5 includes a first joint 51 and a second joint 52 arranged at the two axial ends respectively; the first joint 51 is sleeved on the output shaft 11 and tightly fixed with the output shaft 11; the second joint 52 is sleeved on the impact frame 31 and tightly fixed with the impact frame 31. When the electric oil pressure pulse assembly tool is used, the output shaft 11 of the motor 1 drives the impact frame 31 to rotate through the connector 5, so as to transmit torque to the oil pressure pulse assembly 3.

[0045] In order to improve the assembly accuracy of the output shaft 11 and the impact frame 31, a threaded surface is arranged between the first joint 51 and the output shaft 11, for example, the outer periphery of the output shaft 11 is provided with external threads, and the first joint 51 is a threaded joint with internal threads; the first joint 51 is sleeved and screwed on the shaft end of the output shaft 11, so as to ensure the tight connection of the first joint 51 and the output shaft 11, and better constrain the relative movement of the first joint 51 and the output shaft 11 in the axial and radial directions.

[0046] In addition to the threaded connection of the output shaft 11 and the first joint 51, the output shaft 11 is also matched with the mounting hole shaft hole in the connector 5. More specifically, the connector 5 includes the first joint 51, the second joint 52 and a mounting hole arranged between the two, and the mounting hole is in communication with the first joint 51; the output shaft 11 includes a relatively fixed shaft section I and a shaft section II, the shaft section I is connected to the driving member in the motor 1 through the shaft section II, in other words, the shaft section II is closer to the motor 1 than the shaft section I; when the first joint 51 is sleeved and screwed on the shaft section II, the shaft section I is arranged in the mounting hole, so as to realize the shaft hole matching of the shaft section I and the mounting hole, wherein the shaft section I and the shaft section II can be coaxially distributed, and the shaft section I and the mounting hole can be interference fit.

[0047] As for the second joint 52 of the connector 5, it can include a sleeve 521 for sleeving the impact frame 31 and a plurality of locking screws 522 arranged on the outer periphery of the sleeve 521; any one of the locking screws 522 is arranged along the radial direction of the sleeve 521 and penetrates into the impact frame 31, and all the locking screws 522 are arranged around the sleeve 521 and the impact frame 31 which are sleeved with each other. The locking screws 522 can not only limit the relative position of the sleeve 521 and the impact frame 31 in the axial direction, but also facilitate reducing the assembly gap of the sleeve 521 and the impact frame 31 in the radial direction.

[0048] The above assembly relationship between the second joint 52 and the impact frame 31 realizes the embedded installation of the impact frame 31 in the second joint 52, which is conducive to reducing the bounce between the connector 5 and the impact frame 31 and ensuring the stable transmission of power between the connector 5 and the impact frame 31.

[0049] Considering that the oil pressure pulse assembly 3 needs to provide a cavity structure for the oil inside it to realize sealing operation, the above impact frame 31 can include a working section 310 with a sealed oil cavity inside and a connecting section 311 with a plurality of positioning blind holes on the periphery. In the oil pressure pulse assembly 3, the sealed oil cavity is used to accommodate oil and a transmission structure related to the movement of the oil, and can provide a sealed operating environment for the oil; the positioning blind hole is used to connect the locking screw 522, and satisfies the positioning installation of the locking screw 522 between the sleeve 521 and the impact frame 31. It can be seen that in this embodiment, not only are the sealed oil cavity and the positioning blind hole not connected to each other, but also the working section 310 provided with the sealed oil cavity and the connecting section 311 provided with the positioning blind hole belong to different parts of the impact frame 31. In this way, the shape structure of the sealed oil cavity and the hole depth of the positioning blind hole along the radial direction of the impact frame 31 have little influence on each other, which can not only guarantee the sealed oil cavity and its operating characteristics, but also ensure the connection performance of the second joint 52 and the connecting section 311.

[0050] In particular, in the above embodiment, the outer diameter of the connecting section 311 is greater than the outer diameter of the first joint 51, and the outer diameter of the working section 310 is equal to the outer diameter of the sleeve 521.

[0051] The connecting section 311 and the sleeve 521 are mutually sleeved, specifically, the sleeve 521 is sleeved on the connecting section 311. Based on the assembly relationship between the sleeve 521 and the connecting section 311, the outer diameter of the sleeve 521 is necessarily greater than the outer diameter of the connecting section 311, and also greater than the outer diameter of the first joint 51. At the same time, the outer diameter of the sleeve 521 is equal to the maximum radial dimension of the mutually sleeved connecting section 311 and the sleeve 521, which is equal to the outer diameter of the workpiece section, meaning that the impact frame 31 and the connector 5 can be assembled into a combined structure with a relatively regular shape, which is conducive to the rotation of the housing 4 of the impact frame 31 driven by the motor 1 through the connector 5.

[0052] Further, in the electric oil pressure pulse assembly tool, the axial end face of the impact frame 31 is provided with a center blind hole. When the motor 1, the connector 5 and the impact frame 31 are assembled, the motor 1 is not only fixed by the sleeve of the first joint 51 of the connector 5 through the peripheral surface of the output shaft 11, but also inserted into the center blind hole of the impact frame 31 through the shaft end of the output shaft 11.

[0053] The matching relationship between the shaft end of the output shaft 11 and the center blind hole of the impact frame 31 includes, but is not limited to, clearance fit, interference fit. The shaft end of the output shaft 11 is positioned by the center blind hole, which can simplify the installation of the connector 5 and the impact frame 31. For example, after the shaft end of the output shaft 11 is inserted into the center blind hole, a plurality of locking screws 522 can be conveniently inserted between the sleeve 521 and the impact frame 31.

[0054] As preferred, in the above embodiment, the output shaft 11, the connector 5, the impact frame, and the center blind hole are coaxially distributed. The assembly relationship of the output shaft 11 and the center blind hole not only simplifies the positioning and installation of the locking screw 522, but also helps to ensure the coaxiality of the motor 1 and the impact frame 31 during assembly, thereby improving the installation quality of the motor 1 and the impact frame 31 in the housing 4.

[0055] In the above embodiment, the electric oil pressure pulse assembly tool improves the assembly accuracy and strength of the motor 1 and the oil pressure pulse assembly 3 by adding the connector 5 between the motor 1 and the impact frame 31, avoids vibration when the motor 1 and the oil pressure pulse assembly 3 are directly connected, helps the motor 1 to safely, stably, and accurately transmit torque to the oil pressure pulse assembly 3, and helps to improve the detection accuracy of the detector I and the detector II. Based on the shape and structure of the connector 5, the electric oil pressure pulse assembly tool also adjusts the connection relationship between the motor 1 and the impact frame 31, which can further improve the assembly effect of the motor 1 and the oil pressure pulse assembly 3, and helps to simplify the assembly process of the electric oil pressure pulse assembly tool, thereby providing process support for improving the assembly quality of the motor 1 and the oil pressure pulse assembly 3.

[0056] A specific embodiment of the oil pressure pulse assembly 3 used in the present application is provided below.

[0057] The oil pressure pulse assembly 3 includes an impact frame 31, a camshaft 32, a striking shaft 33, and an oil pressure piston 34. The impact frame 31 has a sealed oil cavity inside. The striking shaft 33 includes striking shaft heads at both axial ends and a striking shaft tail. The camshaft 32, the oil pressure piston 34, and the striking shaft tail are all installed in the sealed oil cavity of the impact frame 31, and the striking shaft tail, the camshaft 32, and the impact frame 31 with the sealed oil cavity are coaxially distributed.

[0058] In the oil pressure pulse assembly 3, the oil pressure block 34 moves along the radial direction of the cam shaft 32, including moving close to and away from the cam shaft 32 along the radial direction of the cam shaft 32. The impact shaft tail and the oil pressure block 34 define two pulse oil cavities. The two pulse oil cavities are communicated through overflow holes; the two pulse oil cavities are located on both sides of the moving direction of any one of the oil pressure blocks 34, thus, the alternating flow of oil in the two pulse oil cavities has a specific corresponding relationship with the reciprocating movement of the oil pressure block 34 along the radial direction of the cam shaft 32. When the impact frame 31 rotates under the driving of the motor 1, the impact frame 31 periodically presses the oil pressure block 34, so that the oil pressure block 34 moves along the radial direction of the cam shaft 32, and the oil in the two pulse oil cavities flows alternately, the aforementioned oil acts on the impact shaft tail, and the driving of the impact shaft 33 is realized. The impact shaft 33 rotates to output the pulse torque outward.

[0059] The oil pressure block 34 can include a sliding seat sleeve 341 and a sliding wheel 342; the sliding seat sleeve 341 is embedded and slidingly fitted in the sliding cavity of the cam shaft 32, one side of the sliding wheel 342 abuts against the sliding seat sleeve 341, and the other end is used to periodically contact the rotating impact frame 31.

[0060] Compared with the conventional mechanical transmission structure, the oil pressure pulse assembly 3 has high sealing performance and good stability, can ensure the working sensitivity and precision in long-term operation, and is beneficial to the combination of the detector I, the detector I, the controller and the connector 5 to ensure the output torque precision of the electric oil pressure pulse assembly tool.

[0061] In addition, the electric oil pressure pulse assembly tool provided by the present application can further include a switch 8, a lighting lamp 6, an indicator lamp and a forward and reverse touch switch 7; the switch 8 and the forward and reverse touch switch 7 are arranged on the surface of the shell 4; the lighting lamp 6 is arranged at the front end of the electric oil pressure pulse assembly tool, which is convenient for the use of the electric oil pressure pulse assembly tool in an environment with insufficient light; the indicator lamp can include an indicator lamp I, an indicator lamp II, an indicator lamp III and an indicator lamp IV, which are respectively used to identify different flow signals of the electric oil pressure pulse assembly tool, for example, the indicator lamp I is turned on when the output torque of the electric oil pressure pulse assembly tool reaches a set value, the indicator lamp II is turned on when the output torque of the electric oil pressure pulse assembly tool does not reach the set value, the indicator lamp III is turned on when the battery 9 of the electric oil pressure pulse assembly tool is about to run out of power, and the indicator lamp IV is turned on when the impact shaft 33 of the electric oil pressure pulse assembly tool is reversed. The four indicator lamps can be distinguished by color, position and mark. For example, the indicator lamp I is a green LED lamp, the indicator lamp II is a red LED lamp, the indicator lamp III is a yellow LED lamp, and the indicator lamp IV is a blue LED lamp.

[0062] The electric oil pressure pulse type assembly tool provided by the application is described in detail. The principle and implementation mode of the application are described by using specific examples, and the above description of the examples is only used to help understand the method of the application and the core idea. It should be pointed out that for ordinary skilled persons in the art, the application can be improved and modified without departing from the principle of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. An electric hydraulic pulse assembly tool, characterized in that, Includes a motor (1) and a hydraulic pulse assembly (3) with a striking shaft (33); the motor (1), the hydraulic pulse assembly (3), and the striking shaft (33) are all housed in a housing (4); the housing (4) also contains: A detector I for monitoring the rotational speed of the output shaft (11) adjacent to the output shaft (1); A detector II, located adjacent to the strike axis (33), is used to monitor the number of strikes on the strike axis (33); A controller connected to detector I, detector II, and motor (1); The controller automatically shuts down the motor (1) when the number of pulses reaches a set value; the number of pulses is the number of acceleration fluctuations obtained based on the rotational speed and the number of impacts. The hydraulic pulse assembly (3) includes an impact frame (31) connected to the output shaft (11); a connector (5) is provided between the impact frame (31) and the output shaft (11); both the impact frame (31) and the connector (5) are bushing-shaped. The connector (5) includes a first connector (51) and a second connector (52) located at opposite ends of the axial direction; the first connector (51) is fitted and tightly fitted to the output shaft (11); the second connector (52) is fitted and tightly fitted to the impact frame (31).

2. The electric hydraulic pulse assembly tool according to claim 1, characterized in that, The detector I includes a magnetic sensor and an encoder.

3. The electric hydraulic pulse assembly tool according to claim 2, characterized in that, A threaded mating surface is provided between the first connector (51) and the output shaft (11).

4. The electric hydraulic pulse assembly tool according to claim 3, characterized in that, The output shaft (11) includes shaft segment I and shaft segment II; shaft segment I is connected to the drive unit in the motor (1) through shaft segment II; the diameter of shaft segment I is smaller than the diameter of shaft segment II; the threaded mating surface is located between the first connector (51) and shaft segment II; shaft segment I mates with the mounting hole shaft hole in the connector (5).

5. The electric hydraulic pulse assembly tool according to any one of claims 2 to 4, characterized in that, The second connector (52) includes a sleeve (521) and a plurality of locking screws (522) arranged around the periphery of the sleeve (521); any of the locking screws (522) passes through the sleeve (521) radially and locks the sleeve (521) and the impact frame (31).

6. The electric hydraulic pulse assembly tool according to claim 5, characterized in that, The impact frame (31) includes a working section (310) with a sealed oil cavity inside and a connecting section (311) with several positioning blind holes on its periphery; the sleeve (521) is fitted into the connecting section (311); all the locking screws (522) are inserted into the positioning blind holes one by one.

7. The electric hydraulic pulse assembly tool according to claim 6, characterized in that, The outer diameter of the connecting section (311) is greater than the outer diameter of the first connector (51); the outer diameter of the working section (310) is equal to the outer diameter of the sleeve (521).

8. The electric hydraulic pulse assembly tool according to claim 7, characterized in that, The impact frame (31) has a central blind hole on its axial end face; the output shaft (11) is inserted into the central blind hole and its shaft hole fits into the central blind hole; the impact frame (31), the central blind hole, the connector (5) and the output shaft (11) are all coaxially distributed.

9. The electric hydraulic pulse assembly tool according to claim 1, characterized in that, The hydraulic pulse assembly (3) includes an impact frame (31), a camshaft (32), and a striking shaft (33); the striking shaft tail of the striking shaft (33) and the camshaft (32) are coaxially mounted in a sealed oil cavity within the impact frame (31); a hydraulic moving block (34) is provided in the sealed oil cavity, which moves radially along the camshaft (32); the hydraulic moving block (34) defines two pulse oil cavities between the sealed oil cavity and the striking shaft tail; the two pulse oil cavities are located on both sides of the moving direction of any one of the hydraulic moving blocks (34); the two pulse oil cavities are connected through an overflow hole; when the impact frame (31) rotates, it periodically squeezes the hydraulic moving block (34) to drive the oil to flow alternately between the two pulse oil cavities, thereby driving the striking shaft (33) to output pulse torque outward.

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