Electric power operation tool

Abstract

The invention relates to the field of electric power system maintenance tools, in particular to an electric power operation tool. The cotter pin mounting tool further comprises a gear box body and a positioning device, the damping regulator and the positioning device are mounted on the gear box body; the abutting rod is used for abutting against the positioning device. The driving gear and the driven gear are arranged in the gear box body; the positioning device comprises a positioning frame, an axial positioning structure and two arc-shaped side baffles. The positioning frame is fixed to the gear box body; the axial positioning structure and the arc-shaped side baffle are mounted on the positioning frame; the two arc-shaped side baffles define a limiting space allowing a screw to be inserted by the cotter pin to enter. The electric power operation tool has the beneficial effects that the electric power operation tool can achieve installation of the cotter pin, the installation consistency is high, and the anti-falling effect can be guaranteed. The arc-shaped side baffles are matched with the screws, the screws are used for assisting in positioning of the electric power operation tool, and deflection in the using process is prevented. The positioning device positions the falling point of the cotter pin to the screw rod, so that the cotter pin is prevented from crossing a pin hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power system maintenance tools, in particular to a power operation tool. BACKGROUND

[0002] In power transmission and transformation, the proportion of fastener defects such as nut loosening is high, and the installation of cotter pins is required to eliminate such defects, and generally, equipotential operation is adopted. That is, the operator needs to reach the installation position of the cotter pin through an insulating ladder, and uses a manual tool such as a special pliers to install the cotter pin.

[0003] The main defects are as follows: (1) an insulating ladder and a manual tool are required, and the high-altitude operation is inconvenient; (2) the personnel need high-voltage protective clothing and need to constantly enter and exit the equipotential position, and the operation procedure is more complicated and time-consuming; (3) the safety risk is high. High voltage and strong electromagnetic field have adverse effects on the human body, and if the operation is not standardized, there is also the risk of electric shock; (4) the operation procedure is complicated, and according to the normal equipotential defect elimination process, a large amount of time will be spent on defect auditing, repair scheme preparation, and work task, safety, and technical measures briefing, so that the time available for the repair process is relatively tight; (5) the manual installation of the cotter pin, the opening of the cotter pin is completely controlled by the experience of the person, the consistency is poor, and the anti-falling effect is difficult to guarantee.

[0004] 202410932706.5 provides a cotter pin installation tool, and if the tool tilts during high-altitude operation, the screw rod and the tool may be separated. In addition, if the contact point of the cotter pin and the screw rod falls on the position beyond the pin hole when the tool is used, the pin insertion work cannot be performed, and therefore it is necessary to limit the positioning of the falling point of the cotter pin to the screw rod. SUMMARY

[0005] The purpose of the present application is to provide a power operation tool to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical solutions:

[0007] An electrical work tool includes: a drive shaft for being driven by an electric wrench, a lead screw shaft, a first lead screw nut, a second lead screw nut, a driven gear, a first engagement arm, a second engagement arm, a spring, a damping adjuster, a stop bar, a pin, and an opener; the drive shaft is provided with a driving gear; the driving gear meshes with the driven gear; the driven gear is mounted to the middle of the lead screw shaft; the lead screw shaft has a first lead screw portion and a second lead screw portion formed on both sides of the driven gear; the threads of the first lead screw portion and the second lead screw portion have opposite directions; the first lead screw portion and the first lead screw portion... The rod nut, the second lead screw section, and the second lead screw nut all constitute a lead screw nut transmission mechanism; one end of the first engagement arm is rotatably mounted to the damping adjuster; the pin is mounted to the other end of the first engagement arm; the first engagement arm and the first lead screw nut form a rotatable connection; the second engagement arm includes: a front arm and a rear arm; one end of the rear arm is rotatably connected to the damping adjuster; the other end of the rear arm is rotatably connected to one end of the front arm; the rear arm and the second lead screw nut form a rotatable connection; the opening device is mounted to the other end of the front arm; a spring connects the front arm and the second lead screw nut.

[0008] The drive shaft passes through the damping adjuster; the damping adjuster adjusts the damping of the drive shaft so that the damping adjuster and the drive shaft rotate synchronously; the cotter has a pointed protrusion for opening and separating the front end of the cotter pin; the stop bar is rotatably mounted to the forearm; the pin holder has a groove; the end of the first engagement arm is slidably disposed in the groove and abuts against the tail ring of the cotter pin to push the cotter pin to slide along the groove and separate from the pin holder.

[0009] A cotter pin installation tool further includes: a gearbox body and a positioning device; a damping adjuster and the positioning device are mounted to the gearbox body; a stop bar is used to abut against the positioning device; and a driving gear and a driven gear are disposed within the gearbox body.

[0010] The positioning device includes: a positioning frame, an axial positioning structure, and two arc-shaped side baffles;

[0011] The positioning frame is fixed to the gearbox body; the axial positioning structure and the arc-shaped side baffles are installed on the positioning frame; the two arc-shaped side baffles form a limiting space for the screw to be inserted with the cotter pin; the axial positioning structure is located in the limiting space; the axial positioning structure is used to abut against the end of the screw for axial limiting; the two arc-shaped side baffles limit the screw from both sides.

[0012] As a further embodiment of the present invention, the axial positioning structure is located between two arc-shaped side baffles; the axial positioning structure is a positioning bolt; the positioning bolt is installed to the positioning frame by means of bolt connection, thereby adjusting the depth of the positioning bolt inserted into the limiting space.

[0013] As a further embodiment of the present invention, the end of the arc-shaped side baffle away from the positioning frame is formed with an inner chamfer to facilitate the screw entering the limiting space.

[0014] As a further embodiment of the present invention, the arc-shaped side baffle is installed to the positioning frame by means of bolt connection; the arc-shaped side baffle is formed with a waist-shaped hole for the bolt to pass through; the length direction of the waist-shaped hole is consistent with the arrangement direction of the two arc-shaped side baffles.

[0015] As a further embodiment of the present invention, the pin holder also has two clamping arms for keeping the front end of the cotter pin together; a hollow hole is formed between the two clamping arms for separating the tail ring of the cotter pin from the pin holder; the depth direction of the hollow hole is consistent with the direction in which the screw is pulled out from the limiting space, and when the screw is pulled out from the limiting space, the cotter pin is pulled out from the hollow hole and between the two clamping arms.

[0016] As a further embodiment of the present invention, the abutment includes: a vertical rod portion and a horizontal rod portion; one end of the vertical rod portion is fixed to the middle of the horizontal rod portion to form a T-shape; the other end of the vertical rod portion is rotatably mounted to the forearm; the horizontal rod portion abuts against two arc-shaped side baffles.

[0017] As a further embodiment of the present invention, the side of the opening facing the pin is configured as an arc shape.

[0018] As a further embodiment of the present invention, the opening device also has guide grooves on both sides of the pointed protrusion to guide the bending of the cotter pin.

[0019] As a further embodiment of the present invention, an electrical work tool further includes: an electric wrench; the electric wrench drives a drive shaft to rotate;

[0020] As a further embodiment of the present invention, the electric wrench is provided with a camera, a supplementary light, and an interface for connecting to an insulating rod; the camera and the supplementary light are located on the side of the electric wrench facing the drive shaft.

[0021] As a further embodiment of the present invention, when the cotter pin is not inserted into the pin hole of the screw, the drive shaft and the damping adjuster rotate synchronously due to the setting of the damping adjuster;

[0022] After the cotter pin is inserted into the pin hole of the screw, it locks the first engagement arm, thus preventing the first engagement arm from rotating. The force on the first engagement arm is transmitted to the damping adjuster. The damping adjuster and the drive shaft overcome the damping and generate sliding friction to rotate relative to each other. The driving gear drives the driven gear to rotate. The rotation of the lead screw shaft drives the first lead screw nut and the second lead screw nut to move closer to each other along the lead screw shaft, so that the first engagement arm and the second engagement arm close together.

[0023] As a further embodiment of the present invention, after the drive shaft rotates, the damping adjuster rotates synchronously under the action of damping, and the cotter pin moves along the thread of the screw until it is inserted into the pin hole on the bolt.

[0024] As a further embodiment of the present invention, after the cotter pin is inserted into the pin hole on the screw, the cotter pin abuts against the screw under the action of the spring.

[0025] The advantages of this invention are: the power work tool can achieve cotter pin installation with high consistency and guaranteed anti-fall-off effect. Utilizing the arc-shaped side baffle and screw, the screw assists in positioning the power work tool, preventing deviation during use. The positioning device positions the cotter pin at the point where it lands on the screw, preventing the cotter pin from exceeding the pin hole.

[0026] The axial positioning structure allows for adjustment of the screw insertion depth.

[0027] The structure of the arc-shaped side baffle allows for fine-tuning of its position using oblong holes, and allows for the installation of specific arc-shaped side baffles according to the appropriate screw.

[0028] Electric wrenches can be connected to an external power insulating rod via an interface for indirect operation. By combining an electric wrench with wireless video assistance, rotation positioning, a pin, and a cotter pin device, electrical work tools can be operated at an intermediate potential via an insulating operating rod to complete the cotter pin installation operation in an indirect manner.

[0029] Other features and advantages of the present invention will be disclosed in detail in the following detailed description and accompanying drawings. Attached Figure Description

[0030] Figure 1 This is a perspective view of a power operation tool as an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 A partial structural diagram of a power operation tool;

[0032] Figure 3 yes Figure 2 A schematic diagram showing the mid-structure after the gearbox body has been removed;

[0033] Figure 4 yes Figure 1 A perspective view of an opening device used in electrical work;

[0034] Figure 5 yes Figure 1 A front view of the opening and the stop bar of an electrical work tool;

[0035] Figure 6 yes Figure 5 Left view of the central opening and the stop bar;

[0036] Figure 7 yes Figure 1 A front view of a positioning device for a power work tool;

[0037] Figure 8 yes Figure 7 Left view of the positioning device;

[0038] Figure 9 yes Figure 1 A front view of the latch of an electrical work tool;

[0039] Figure 10 yes Figure 9 Left view of the internal structure of the cotter pin after part of the housing has been removed, showing the state before the cotter pin is pushed out;

[0040] Figure 11 yes Figure 10 A schematic diagram of another state of the internal structure of the cotter pin after removing part of the housing, showing the state in which the cotter pin is pushed out;

[0041] Figure 12 yes Figure 1 A schematic diagram of an opening device and a locking device for electrical work, in which the cotter pins abut against the screw from both sides.

[0042] List of reference numerals: 100 electrical work tool, 10 electric wrench, 20 gearbox body, 21 drive shaft, 211 drive gear, 22 lead screw shaft, 221 first lead screw part, 222 second lead screw part, 2201 first lead screw nut, 2202 second lead screw nut, 2203 driven gear, 23 first engagement arm, 24 second engagement arm, 241 front arm, 242 rear arm, 25 spring, 26 damping adjuster, 27 stop bar, 28 pin, 281 slide groove, 282 clamp arm, 283 hollow hole, 29 opener, 291 sharp corner protrusion, 292 guide groove, 30 positioning device, 31 positioning frame, 32 axial positioning structure, 33 arc-shaped side baffle, 101 cotter pin. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figures 1 to 12 As shown, an electrical work tool 100 includes: a drive shaft 21, a lead screw shaft 22, a first lead screw nut 2201, a second lead screw nut 2202, a driven gear 2203, a first engagement arm 23, a second engagement arm 24, a spring 25, a damping adjuster 26, a stop bar 27, a pin 28, and an opener 29 for being driven by an electric wrench 10.

[0045] The drive shaft 21 is equipped with a driving gear 211. The driving gear 211 meshes with the driven gear 2203. The driven gear 2203 is mounted to the middle of the lead screw shaft 22. The lead screw shaft 22 has a first lead screw portion 221 and a second lead screw portion 222 formed on both sides of the driven gear 2203. The threads of the first lead screw portion 221 and the second lead screw portion 222 have opposite directions. The first lead screw portion 221 and the first lead screw nut 2201, as well as the second lead screw portion 222 and the second lead screw nut 2202, all constitute a lead screw and nut transmission mechanism.

[0046] One end of the first engagement arm 23 is rotatably mounted to the damping adjuster 26. A pin 28 is mounted to the other end of the first engagement arm 23. The first engagement arm 23 is rotatably connected to the first lead screw nut 2201. The second engagement arm 24 includes a front arm 241 and a rear arm 242. One end of the rear arm 242 is rotatably connected to the damping adjuster 26. The other end of the rear arm 242 is rotatably connected to one end of the front arm 241. The rear arm 242 is rotatably connected to the second lead screw nut 2202. An opening device 29 is mounted to the other end of the front arm 241. A spring 25 connects the front arm 241 and the second lead screw nut 2202. A drive shaft 21 passes through the damping adjuster 26. The damping adjuster 26 adjusts the damping of the drive shaft 21 so that the damping adjuster 26 and the drive shaft 21 rotate synchronously.

[0047] The cotter pin 29 has a pointed protrusion 291 for opening and separating the front end of the cotter pin 101. The abutment 27 is rotatably mounted to the forearm 241. The pin holder 28 has a groove 281. The end of the first engaging arm 23 is slidably disposed in the groove 281 and abuts against the tail ring of the cotter pin 101 to push the cotter pin 101 to slide along the groove 281 and separate from the pin holder 28.

[0048] In a preferred embodiment, a cotter pin installation tool 100 further includes a gearbox 20 and a positioning device 30. A damping adjuster 26 and the positioning device 30 are mounted to the gearbox 20. A stop bar 27 is used to abut against the positioning device 30. A driving gear 211 and a driven gear 2203 are disposed within the gearbox 20.

[0049] The positioning device 30 includes: a positioning frame 31, an axial positioning structure 32, and two arc-shaped side baffles 33.

[0050] The abutment rod 27 abuts against the arc-shaped side baffle 33. The positioning frame 31 is fixed to the gearbox body 20. The axial positioning structure 32 and the arc-shaped side baffle 33 are installed on the positioning frame 31.

[0051] Two arc-shaped side baffles 33 form a limiting space for the screw to be inserted into the cotter pin 101. An axial positioning structure 32 is located within the limiting space. The axial positioning structure 32 is used to abut against the end of the screw for axial limiting. The two arc-shaped side baffles 33 limit the screw from both sides.

[0052] In one specific implementation, the axial positioning structure 32 is located between the two arc-shaped side baffles 33. The axial positioning structure 32 is a positioning bolt. The positioning bolt is installed to the positioning frame 31 by bolt connection, thereby adjusting the depth of the positioning bolt inserted into the limiting space.

[0053] As one specific implementation, the end of the arc-shaped side baffle 33 away from the positioning frame 31 is formed with an inner chamfer to facilitate the screw entering the limiting space.

[0054] In one specific implementation, the arc-shaped side baffle 33 is installed to the positioning frame 31 by bolt connection. The arc-shaped side baffle 33 has an oblong hole for the bolt to pass through. The length direction of the oblong hole is consistent with the arrangement direction of the two arc-shaped side baffles 33.

[0055] In one specific implementation, the pin holder 28 also has two clamping arms 282 for holding the front end of the cotter pin 101 together. A perforated hole 283 is formed between the two clamping arms 282 to allow the tail ring of the cotter pin 101 to separate from the pin holder 28. The depth direction of the perforated hole 283 is consistent with the direction in which the screw is pulled out of the limiting space. When the screw is pulled outward from the limiting space, the cotter pin 101 is pulled out from between the perforated hole 283 and the two clamping arms 282.

[0056] In one specific embodiment, the abutment 27 includes a vertical section and a horizontal section. One end of the vertical section is fixed to the middle of the horizontal section, forming a T-shape. The other end of the vertical section is rotatably mounted to the forearm 241. The horizontal section abuts against two arc-shaped side baffles 33.

[0057] In one specific implementation, when the cotter pin 101 is not inserted into the pin hole of the screw, the drive shaft 21 and the damping adjuster 26 rotate synchronously due to the setting of the damping adjuster 26.

[0058] After the cotter pin 101 is inserted into the pin hole of the screw, it locks the first engagement arm 23, thereby preventing the first engagement arm 23 from rotating. The force on the first engagement arm 23 is transmitted to the damping adjuster 26. The damping adjuster 26 and the drive shaft 21 overcome the damping and generate sliding friction to rotate relative to each other. The driving gear 211 drives the driven gear 2203 to rotate. The rotation of the lead screw shaft 22 drives the first lead screw nut 2201 and the second lead screw nut 2202 to move closer to each other along the lead screw shaft 22, so that the first engagement arm 23 and the second engagement arm 24 close together.

[0059] In one specific implementation, after the screw pushes the abutment 27 to rotate and disengage from the positioning device 30, the opening device 29 abuts against the screw under the action of the spring 25. After the screw is inserted along the limiting space, its lower end is lower than the arc-shaped side baffle 33, and the lower end contacts and pushes the abutment 27 to rotate.

[0060] In one specific implementation, after the drive shaft 21 rotates, the damping adjuster 26 rotates synchronously under the action of damping, and the cotter pin 101 moves along the thread of the screw until it is inserted into the pin hole on the bolt.

[0061] In one specific implementation, the side of the opening 29 facing the pin 28 is configured in an arc shape. The arc shape is used to align the bolt.

[0062] As one specific implementation, the opening device 29 also has guide grooves 292 on both sides of the pointed protrusion 291 to guide the bending of the cotter pin 101.

[0063] As an optional implementation, the power work tool 100 can be connected to an external power tool, i.e., mounted on a power tool, and driven by the power tool to install the cotter pin. As a preferred implementation, the power work tool 100 can also be driven by a dedicated power tool. Specifically, a power work tool 100 further includes: an electric wrench 10. The electric wrench 10 drives the drive shaft 21 to rotate. The torque of the electric wrench 10 is 120 NM. The electric wrench 10 is equipped with a camera, a supplementary light, and an interface for connecting to an insulating rod. The camera and supplementary light are located on the side of the electric wrench 10 facing the drive shaft 21. Operation is performed by connecting the insulating operating rod of the electric standard to the interface of the electric wrench 10. The interface of the electric wrench 10 is formed by the housing of the electric wrench 10. The insulating rod can be fixed to the interface by insertion or by screwing. The electric wrench is controlled via a mobile phone APP. The camera is connected to the mobile phone APP to view the video in front. The supplementary light 13 is controlled by the mobile phone APP to provide supplementary lighting in low light conditions.

[0064] In use, first, by controlling the knob of the damping adjuster 26, the damping adjuster 26 can be rotated synchronously with the drive shaft 21. Then, the cotter pin 101 is inserted into the groove 281 of the pin holder 28. The cotter pin 101 will not slide out of the groove 281 of the pin holder 28 due to friction.

[0065] Bring the abutment 27 close to the screw where the cotter pin 101 is to be installed, and use the end of the screw to push the abutment 27 to rotate, causing it to disengage from the positioning device 30. At this time, under the action of the spring 25, the cotter pin 29 abuts against the screw. Start the electric wrench 10 to drive the drive shaft 21 to rotate, and the drive shaft 21, the first engagement arm 23 and the second engagement arm 24 rotate synchronously. The cotter pin 101 is screwed along the thread on the screw until it moves to the pin hole on the screw and is inserted into the pin hole. Because the cotter pin 101 is stuck in the pin hole, the first engagement arm 23 cannot rotate. The torque on the drive shaft 21 is greater than the torque of the damping adjuster 26, and the drive shaft 21 rotates relative to the damping adjuster 26, the first engagement arm 23 and the second engagement arm 24. The driving gear 211 drives the driven gear 2203 to rotate. The first lead screw nut 2201 and the second lead screw nut 2202 approach each other on the lead screw shaft 22, causing the first engagement arm 23 and the second engagement arm 24 to retract. The first engagement arm 23 moves relative to the pin holder 28, pressing the cotter pin 101 within the slide groove 281, causing the cotter pin 101 to move towards the opener 29. The cotter pin 101 passes through the pin hole on the bolt and contacts the opener 29. The opener 29 forces the front end of the cotter pin 101 to separate and bend through the pointed protrusion 291 and the guide groove 292, completing the installation of the cotter pin 101. After the cotter pin 101 is installed in place, the tail ring of the cotter pin 101 moves to the hollow hole 283. At this time, the tool can be pulled out along the axial direction of the screw, allowing the cotter pin 101 to remain inside the screw.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power work tool (100), comprising: Drive shaft (21), lead screw shaft (22), first lead screw nut (2201), second lead screw nut (2202), driven gear (2203), first engagement arm (23), second engagement arm (24), spring (25), damping adjuster (26), stop bar (27), pin (28) and opener (29) for being driven by electric wrench (10); The drive shaft (21) is provided with a drive gear (211); the drive gear (211) meshes with the driven gear (2203); the driven gear (2203) is installed in the middle of the lead screw shaft (22); the lead screw shaft (22) has a first lead screw portion (221) and a second lead screw portion (222) respectively formed on both sides of the driven gear (2203); the threads of the first lead screw portion (221) and the second lead screw portion (222) are opposite in direction; the first lead screw portion (221) and the first lead screw nut (2201) and the second lead screw portion (222) and the second lead screw nut (2202) all constitute a lead screw nut transmission mechanism; One end of the first engagement arm (23) is rotatably mounted to the damping adjuster (26); the pin (28) is mounted to the other end of the first engagement arm (23); the first engagement arm (23) and the first lead screw nut (2201) are rotatably connected; the second engagement arm (24) includes: a front arm (241) and a rear arm (242); one end of the rear arm (242) is rotatably connected to the damping adjuster (26); the other end of the rear arm (242) is rotatably connected to the front arm (241). 1) One end; the rear arm (242) and the second lead screw nut (2202) are rotatably connected; the opener (29) is installed to the other end of the forearm (241); the spring (25) connects the forearm (241) and the second lead screw nut (2202); the drive shaft (21) passes through the damping adjuster (26); the damping adjuster (26) adjusts the damping of the drive shaft (21) so that the damping adjuster (26) and the drive shaft (21) rotate synchronously; The opening device (29) has a pointed protrusion (291) for opening and separating the front end of the cotter pin (101); the abutment (27) is rotatably mounted to the forearm (241); the pin device (28) has a groove (281); the end of the first engagement arm (23) is slidably disposed in the groove (281) and abuts against the tail ring of the cotter pin (101) to push the cotter pin (101) to slide along the groove (281) and separate from the pin device (28); The invention is characterized by a power operation tool (100) further comprising: a gearbox (20) and a positioning device (30); the damping adjuster (26) and the positioning device (30) are mounted to the gearbox (20); the abutment (27) is used to abut against the positioning device (30); the driving gear (211) and the driven gear (2203) are disposed within the gearbox (20); The positioning device (30) includes: a positioning frame (31), an axial positioning structure (32), and two arc-shaped side baffles (33). The positioning frame (31) is fixed to the gearbox body (20); the axial positioning structure (32) and the arc-shaped side baffle (33) are installed on the positioning frame (31); the two arc-shaped side baffles (33) form a limiting space for the screw to be inserted by the cotter pin (101); the axial positioning structure (32) is located in the limiting space; the axial positioning structure (32) is used to abut against the end of the screw for axial limiting; the two arc-shaped side baffles (33) limit the screw from both sides.

2. The power operation tool (100) according to claim 1, characterized in that, The axial positioning structure (32) is located between the two arc-shaped side baffles (33); the axial positioning structure (32) is a positioning bolt; the positioning bolt is installed to the positioning frame (31) by means of bolt connection, thereby adjusting the depth of the positioning bolt inserted into the limiting space.

3. The power operation tool (100) according to claim 1, characterized in that, The arc-shaped side baffle (33) has an inner chamfer at the end away from the positioning frame (31) so that the screw can enter the limiting space.

4. The power operation tool (100) according to claim 1, characterized in that, The arc-shaped side baffle (33) is installed to the positioning frame (31) by bolt connection; the arc-shaped side baffle (33) has a waist-shaped hole for the bolt to pass through; the length direction of the waist-shaped hole is consistent with the arrangement direction of the two arc-shaped side baffles (33).

5. The power operation tool (100) according to claim 1, characterized in that, The pin holder (28) also has two clamp arms (282) for holding the front end of the cotter pin (101) together; the two clamp arms (282) form a hollow hole (283) between them for separating the tail ring of the cotter pin (101) from the pin holder (28); the depth direction of the hollow hole (283) is consistent with the direction in which the screw is pulled out from the limiting space, and when the screw is pulled out from the limiting space, the cotter pin (101) is pulled out from the hollow hole (283) and between the two clamp arms (282).

6. The power operation tool (100) according to claim 1, characterized in that, The abutment (27) includes a vertical rod and a horizontal rod; one end of the vertical rod is fixed to the middle of the horizontal rod to form a T-shape; the other end of the vertical rod is rotatably mounted to the forearm (241); the horizontal rod abuts against the two arc-shaped side baffles (33).

7. The power operation tool (100) according to claim 1, characterized in that, The opening (29) is set in an arc shape on the side facing the pin (28).

8. The power operation tool (100) according to claim 1, characterized in that, The opening device (29) also has guide grooves (292) on both sides of the pointed protrusion (291) to guide the bending of the cotter pin (101).

9. The power operation tool (100) according to claim 1, characterized in that, An electrical work tool (100) further includes an electric wrench (10); the electric wrench (10) drives the drive shaft (21) to rotate.

10. A power operation tool (100) according to claim 9, characterized in that, The electric wrench (10) is equipped with a camera, a fill light and an interface for connecting to an insulating rod; the camera and the fill light are located on the side of the electric wrench (10) facing the drive shaft (21).

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