CN117257363B

CN117257363B - Locking assembly

Info

Publication number: CN117257363B
Application number: CN202311130036.7A
Authority: CN
Inventors: 岳欣; 莫福昊
Original assignee: Bangshi Medical Technology Co ltd
Current assignee: Bangshi Medical Technology Co ltd
Priority date: 2023-09-04
Filing date: 2023-09-04
Publication date: 2024-02-23
Anticipated expiration: 2043-09-04
Also published as: CN117257363A

Abstract

The invention relates to the technical field of medical equipment, in particular to a locking assembly, which is used for fixing a cutter on a power handle and comprises a connecting piece, a rotating piece and an elastic piece, wherein one end of the connecting piece is connected with the cutter, the other end of the connecting piece is connected with the power handle, the rotating piece is rotatably sleeved on the connecting piece and used for locking or unlocking the cutter, and the elastic piece is arranged in the connecting piece and used for limiting the cutter to move relative to the power handle in the circumferential direction; the invention realizes the locking and unlocking between the cutter and the power handle in a way of controlling the ball to rise and fall by the rotating piece, has the characteristics of convenience, rapidness and firm structure, and realizes the meaning of a quick connector.

Description

Locking assembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to a locking assembly.

Background

In the era that the high and new technology runs through and merges into life, the operation power apparatus is also widely used to the bone tissue operation of departments such as otorhinolaryngology branch of academic or vocational study, orthopedics, neurosurgery, spinal surgery, can provide a plurality of surgical operation functions such as mill, saw, etc. it mainly comprises cutter assembly, locking subassembly and power handle, establish the motor in the power handle, transmission mechanism or part of transmission mechanism are located inside the locking subassembly, be connected cutter assembly and power handle through the locking subassembly, the motor output shaft provides power for the cutter through the transmission mechanism who connects with it, in order to carry out various bone tissue operations.

The locking subassembly has crucial influence to the steady operation of cutter, among the prior art, and locking subassembly often realizes the locking to the cutter with buckle and recess and the mode that combines the locating pin, but this structure is unstable enough, produces not hard up between locking subassembly and the cutter because of the vibrations that the motor brought easily in the use for power instrument produces noise and unusual heating in the use, brings certain risk for the operation. In addition, the structure lacks of fool-proof design, and personnel can easily pull out the cutter from the handle by misoperation. Based on the problems existing in the prior art, a plurality of attempts are made by the skilled person, for example, chinese patent application CN216167586U discloses a joint assembly, the stability between the locking assembly and the cutter is enhanced by improving the elastic raised structure, and positioning is performed by adopting the positioning pin, so as to achieve the locking purpose, although the connection is more stable, the locking is performed by using the elastic structure, the problem that the cutter is easily pulled out from the power handle due to misoperation still exists, and the operation process is affected.

Disclosure of Invention

In order to solve the problems, the invention provides a locking assembly, which is used for locking and unlocking a cutter through a rotating piece and a locking structure arranged in the rotating piece, has a stable structure, can not pull out the cutter through external force, and avoids the problem that the cutter is easy to pull out of a power handle due to misoperation.

In order to achieve the above purpose, the invention adopts the following technical scheme: a locking assembly for securing a cutter to a power handle, the locking assembly comprising a connector, a rotator and an elastic member; one end of the connecting piece is connected with the cutter, and the other end of the connecting piece is connected with the power handle; the rotating piece is rotatably sleeved on the connecting piece and used for locking or unlocking the cutter; the elastic piece is arranged in the connecting piece and used for limiting the cutter to move relative to the power handle in the circumferential direction.

Further, the connecting piece includes connecting cylinder and fixed section of thick bamboo, the connecting cylinder rear end is equipped with annular region, is equipped with a plurality of round holes near annular region department on the connecting cylinder, be equipped with a plurality of bolt holes on the annular region, fixed section of thick bamboo includes anterior segment, middle section and rear segment, anterior segment and connecting cylinder rear end fixed connection, rear segment and power handle fixed connection.

Further, the rotating piece comprises a movable locking table, a rotating cylinder, a plurality of bolts and balls, wherein the movable locking table is sleeved on the front section and comprises a bolt limiting part and a ball moving part, the bolt limiting part is arranged at the rear end of the movable locking table, the ball moving part is arranged at the front end of the movable locking table, the balls are movably arranged in the ball moving part, the bolts penetrate through bolt holes in the annular area and are clamped at a bolt limiting part, and the rotating cylinder is sleeved on the fixed cylinder and is clamped with the bolt limiting part.

Further, the limit portion edge of bolt is equipped with a plurality of joint portions, rotary cylinder front end internal surface is equipped with a plurality of archs, and is a plurality of the arch corresponds the joint with a plurality of joint portion, the inside a plurality of spacing grooves that are equipped with of bolt limit portion, the bolt pass the regional bolt hole of annular and joint in the spacing inslot, ball movable part is equipped with a plurality of movable areas, and the ball is corresponding to the activity and is set up in the movable area, the movable area includes locking platform and unlocking groove, and locking platform and unlocking groove set up side by side, unlocking groove's lateral wall sets up to the inclined plane.

Further, the middle part of the clamping part is arc-shaped, the two ends of the clamping part are provided with arc-shaped grooves, the two ends of the limiting groove are circular, and the middle part of the limiting groove is smooth arc-shaped with reduced width.

Through set up joint portion on movable locking platform to make joint portion and locate protruding cooperation on the fixed section of thick bamboo and be connected, can drive movable locking platform one when making the rotatory section of thick bamboo and rotate, through rotating movable locking platform, then can make the position of ball switch between unlocking groove and locking platform, thereby make the cutter switch between locking state and unlocking state, accomplish the dismantlement or the change process of cutter with this kind of mode, make whole operation more convenient and fast, realized the meaning of quick interface, and lock through the ball, make the structure more firm.

Further, the bolt comprises a first connecting part, a second connecting part and a third connecting part, wherein the second connecting part is in a truncated cone shape, a shoulder is formed between the second connecting part and the first connecting part, the shoulder is attached to the inner wall of the annular area, and the third connecting part is inserted into the limiting groove.

Further, the elastic piece comprises a gasket and a plurality of groups of springs, a plurality of holes are formed in the side wall of the middle section of the fixed cylinder, the gasket is arranged at the hole opening and is attached to the movable locking table, and the springs are arranged in the holes under the compression state.

Through making the outstanding annular region of first connecting portion of bolt, the third connecting portion passes the spacing groove, then can make when connecting the handle of a knife, forward push the bolt through the elastic component, make the bolt by supporting to press on the handle of a knife, can further increase the frictional force between handle of a knife and the power handle, avoid the tool bit direction of working to take place to deflect to this makes and need not to set up the locating pin on the handle of a knife, makes the connection process more convenient and fast.

Further, a plurality of sealing rings are arranged on the connecting cylinder, a plurality of heat dissipation windows are formed in the middle section of the fixed cylinder, and a plurality of air outlets are formed in the rotary cylinder.

Further, the power handle includes shell, motor output shaft, cable cover and cable cover retaining member, shell front end and fixed section of thick bamboo back end fixed connection, and the rear end is equipped with the air intake, and inside is equipped with the air inlet passageway, in the shell was located to the motor, motor output shaft locates the motor front end, the motor output shaft other end is connected with power transmission spare, the power transmission spare overcoat is equipped with radiator fan, the cable cover is located the end of power handle for the cable of protection motor, cable cover retaining member locates cable cover front end, is used for fixed cable cover.

By arranging the heat dissipation air duct, the influence of the heating phenomenon generated in the working process on the operation process is reduced.

Further, the cutter comprises a cutter handle, a transmission shaft is arranged in the cutter handle and connected to one end of the power transmission part, a groove penetrating along the circumferential direction is formed in the inner surface of the cutter handle, and the position of the groove corresponds to that of the ball.

The technical scheme of the invention has the beneficial effects that:

1. through the combination use movable locking platform, rotary cylinder, bolt and ball constitution rotating member, realize the locking and the unblock of cutter through the mode that the rotating member control ball rises and falls, enable firm connection between cutter and the power handle, can avoid the maloperation to pull out the problem of cutter from the handle, avoided the influence that causes to the operation process.

2. The locking and unlocking functions of the cutter are controlled through the rotating piece, the cutter is quickly detached and fixed, positioning through a positioning pin is not needed during connection, the purpose of quickly detaching or replacing the cutter is achieved, convenience and rapidness are achieved, and the meaning of a quick connector is achieved.

3. The elastic piece is used for pressing the inserting pin to increase the friction force between the cutter and the power handle, so that the structure of the locking assembly is more compact, the stability of the structure is improved, the problem that the cutter rotates circumferentially due to vibration of the motor can be avoided, and the problem that unnecessary normal tissue damage is caused due to deflection of the working direction of the cutter head is avoided.

4. Through set up the heat dissipation window on the fixed pipe, set up the air intake on the power handle shell, set up the air inlet passageway in the shell and set up the air outlet on the rotary drum to and set up radiator fan in the shell and form the heat dissipation wind channel, reduced the influence of high temperature to the operation process.

5. The setting of spacing groove has limited the rotatory scope of rotatory section of thick bamboo in circumference, and sets up the spacing groove into both ends be with circular, and the centre is the gentle arc that the width reduces, has provided the feel on rotatory, can help the doctor confirm the progress of locking.

6. The side wall of the unlocking groove is set to be an inclined plane, so that the movable locking table can be prevented from being clamped by the ball in the rotating process, and clamping in the switching process of the locking state and the unlocking state of the cutter is avoided.

Drawings

In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is an isometric view of the overall structure of a locking assembly and a power handle of the present invention.

Fig. 2 is a schematic view of the structure of the rotary drum of fig. 1 after removal.

FIG. 3 is a cross-sectional view of the locking assembly and the power handle.

Fig. 4 is a partial enlarged view at a in fig. 3.

Fig. 5 is an isometric view of the movable lock-out table.

Fig. 6 is an isometric view of a rotating drum.

Fig. 7 is an isometric view of a latch.

Fig. 8 is an isometric view of a tool shank.

Wherein: 110-connecting cylinder, 111-round hole, 112-annular area, 113-sealing ring, 120-fixed cylinder, 121-front section, 122-middle section, 123-rear section, 124-heat dissipation window, 210-rotary cylinder, 211-air outlet, 212-bulge, 220-movable locking platform, 221-bolt limiting part, 2211-clamping part, 2212-limiting groove, 222-ball movable part, 2221-locking platform, 2222-unlocking groove, 230-bolt, 231-first connecting part, 232-second connecting part, 233-third connecting part, 310-gasket, 320-spring, 410-air inlet, 420-heat dissipation fan, 430-motor, 431-motor output shaft, 440-air inlet channel, 450-power transmission part, 500-cable sleeve locking part, 600-cable sleeve, 810-groove and 820-transmission shaft.

Detailed Description

The following description of the present invention is provided with reference to the accompanying drawings, but is not limited to the following description, and any modifications or equivalent substitutions of the present invention should be included in the scope of the present invention without departing from the spirit and scope of the present invention.

Example 1

As shown in fig. 1, the locking assembly comprises a connecting piece, a rotating piece and an elastic piece, wherein one end of the connecting piece is used for connecting a cutter, the other end of the connecting piece is connected with a power handle, the rotating piece is sleeved on the connecting piece, and the elastic piece is arranged in the connecting piece.

As shown in fig. 2 and 3, the connecting piece includes a connecting cylinder 110 and a fixing cylinder 120, the connecting cylinder 110 is cylindrical, the front end and the middle part of the connecting cylinder 110 are provided with a sealing ring 113 for increasing the friction force between the tool holder and the connecting cylinder 110, the rear end is in an annular shape with enlarged diameter, an annular region 112 is formed, three pin 230 holes are uniformly provided in the annular region 112 along the circumferential direction, three round holes 111 are uniformly provided in the position near the annular region 112 along the circumferential direction on the cylindrical region for exposing the ball 700, the fixing cylinder 120 includes a front section 121, a middle section 122 and a rear section 123, the diameter of the front section 121 is smaller than the diameter of the cylindrical region of the connecting cylinder 110, the diameter of the middle section 122 is the same as the diameter of the annular region 112 of the connecting cylinder 110, the diameter of the rear section 123 is smaller than the middle section 122, and slightly larger than the diameter of the front end of the power handle housing 400, the outer surface of the front section 121 of the fixing cylinder 120 is provided with threads, the three pin 230 holes are uniformly provided in the circumferential direction on the annular region 112, six windows 124 are uniformly provided in the circumferential direction on the fixing cylinder 122, the rear section 120 is provided with the inner surface 123 of the fixing cylinder 120, the inner surface 123 is provided with the threads 123, the front section 123 is fixedly connected with the front end of the power handle housing 400 and the rear section 120, and the rear section 120 is fixedly connected with the front section 120 through the thread, and the front section 120 and the rear section 120 is fixedly connected with the front section 120.

As shown in fig. 3-7, the rotating member includes a movable locking platform 220, a rotating cylinder 210, a latch 230 and a ball 700, wherein the movable locking platform 220 is sleeved on the front section 121 of the fixed cylinder 120, and specifically includes a latch limiting portion 221 and a ball moving portion 222, wherein the latch limiting portion 221 is located at the rear end of the movable locking platform 220 and is disposed in a gap between the annular region 112 and the middle section 122 of the fixed cylinder 120, and the ball moving portion 222 is located at the front end of the movable locking platform 220; the whole bolt limiting part 221 is circular, the diameter of the bolt limiting part is smaller than that of the annular region 112, three clamping parts 2211 are arranged on the edge of the bolt limiting part 221 along the circumferential direction, an arc-shaped section is arranged in the middle of the clamping parts 2211, two arc-shaped grooves are respectively arranged at two ends of the bolt limiting part, the radian of the arc-shaped section is equal to that of the bolt limiting part 221, the arc-shaped grooves are recessed towards the center of the bolt limiting part 221, three limiting grooves 2222 are uniformly arranged in the bolt limiting part 221 along the circumferential direction, the limiting grooves 2222 are dumbbell-shaped, the two ends are circular, and the middle of the bolt limiting part is a gentle arc with reduced width; the ball movable portion 222 is cylindrical, the diameter is larger than the diameter of the front section 121 of the fixed cylinder 120, three movable areas are uniformly arranged at the periphery of the end opening of the ball movable portion 222, and the ball 700 can move in the movable areas and can be exposed from the circular hole 111 of the connecting cylinder 110. The movable area comprises a locking platform 2221 and an unlocking groove 2222 which are arranged in parallel, wherein the side wall of the unlocking groove 2222 is an inclined plane, so that the blocking of the movable locking platform 220 by the balls 700 in the rotating process can be avoided, the locking platform 2221 is arranged along the circumferential direction, the unlocking groove 2222 is axially arranged, three balls 700 are respectively arranged in the three movable areas, the positions of the balls 700 can be switched between the unlocking groove 2222 and the locking platform 2221 according to the unlocking or locking state, when the movable locking platform is in the unlocking state, the balls 700 are positioned at the unlocking groove 2222, and when the movable locking platform is in the locking state, the balls 700 are positioned at the locking platform 2221;

the latch 230 includes a first connection portion 231, a second connection portion 232, and a third connection portion 233, where the first connection portion 231 and the third connection portion 233 are cylindrical, the second connection portion 232 is in a truncated cone shape, the bottom surface diameter of the first connection portion 231 is smaller than that of the second connection portion 232, the bottom surface diameter of the third connection portion 233 is smaller than that of the first connection portion 231, the top surface diameter of the second connection portion 232 is equal to that of the third connection portion 233, when the latch is installed, the first connection portion 231 passes through a latch 230 hole on the annular region 112 and is exposed from the latch 230 hole, the second connection portion 232 cannot pass through the latch 230 hole due to the limitation of the diameter, and the conical surface at the other end of the second connection portion 232 and the third connection portion 233 stretch into the limit groove 2222;

the rotary cylinder 210 is sleeved between the annular region 112 and the rear section 123 of the fixed cylinder 120, an air outlet 211 is arranged on the outer surface of the rotary cylinder 210 near the front end, three protrusions are arranged on the inner surface of the front end of the rotary cylinder 210, the protrusions correspond to the clamping parts 2211 in position and are mutually matched, when the rotary cylinder 210 is installed, the front end of the rotary cylinder 210 is attached to the annular region 112, the rear end of the rotary cylinder abuts against the power handle shell 400, meanwhile, the protrusions are matched with the clamping parts 2211, the rotary cylinder 210 is connected with the movable locking table 220, and the movable locking table 220 can be driven to rotate together when the rotary cylinder 210 rotates; when in use, the rotary cylinder 210 is rotated to drive the movable locking platform 220 to rotate, so that the position of the ball 700 is switched from the unlocking groove 2222 to the locking platform 2221, thereby exposing the ball 700 from the round hole 111 of the connecting cylinder 110, realizing the switching from the unlocking state to the locking state, in the rotating process, the third connecting part 233 of the bolt 230 is switched from the left end round opening to the right end round opening of the limiting groove 2222, and the rotating range of the movable locking platform 220 is limited, thereby limiting the rotatable range of the rotary cylinder 210 and the movable locking platform 220, and the position of the bolt 230 can be subjected to a resistance in the changing process due to the gentle radian with smaller width in the middle of the limiting groove 2222, thereby providing a stress sense in the rotating process, so as to be convenient for judging the progress of locking or unlocking.

As shown in fig. 4, the elastic member is disposed in the fixed cylinder 120 and includes a spacer 310 and four sets of springs 320, the spacer 310 is disposed between the movable locking stand 220 and the middle section 122 of the fixed cylinder 120 and is attached to the movable locking stand 220, four holes that are axially backward are formed on a side wall of one end of the middle section 122 of the fixed cylinder 120, which is close to the spacer 310, the four sets of springs 320 are respectively disposed in the four holes, and the springs 320 are in a compressed state, one end of each spring is abutted against a rear wall of the hole, and one end of each spring is abutted against the spacer 310, so that the spacer 310 can be pressed against the movable locking stand 220 and the latch 230 forward, thereby further increasing friction force between the tool handle and the power handle, and avoiding the problem that the tool rotates circumferentially due to vibration of the motor 430.

As shown in fig. 1-3, the power handle includes a housing 400, a cooling fan 420, a motor 430, a motor output shaft 431, a cable sleeve 600 and a cable sleeve locking member 500, the front end of the housing 400 is designed to be in a stepped shape, two shoulders are formed, the first shoulder is attached to the rear end of the rotary drum 210, the second shoulder is attached to the rear end of the rotary drum 120, an air inlet 410 is disposed at the position, close to the tail, of the outer surface of the housing 400, an air inlet channel 440 is disposed at the position, close to the inner surface of the housing 400, the middle of the housing 400 is provided with the motor 430, the front end of the motor 430 is provided with the motor output shaft 431, the front end of the motor output shaft 431 is connected with a power transmission member 450, the other end, close to the outer periphery of the power transmission member 450, of the cable sleeve 600 is sleeved with the cooling fan 420, and the heat generated by the operation of the motor 430 can be discharged through the cooling fan 420 in combination with the air inlet 410 on the housing 400, the air inlet channel 440 on the housing 400, the heat dissipation window 124 on the rotary drum 120 and the air outlet 211 on the rotary drum 210, thereby avoiding the influence on equipment caused by heat generation, and the influence on the tail end of the motor, on the apparatus, and the cable sleeve 600 is used for protecting the cable sleeve 600, and cable sleeve locking member 600.

As shown in fig. 8, the transmission shaft is disposed in the handle, and is used for driving the motor 430 to drive the tool to move, a circle of groove 810 is formed in the inner wall of the handle near the port along the circumferential direction, when the handle is inserted into the connecting cylinder 110, the position of the groove 810 exactly corresponds to the positions of the ball 700 and the circular hole 111 on the connecting cylinder 110, and when in use, the ball 700 is exposed from the circular hole 111 and then exactly can be clamped in the groove 810.

When the locking assembly is in an unlocking state, the connecting cylinder 110 is inserted into the tool handle, the side wall of the tool handle is attached to the bolt 230, the groove 810 is just above the round hole 111 formed in the connecting cylinder 110, then the rotary cylinder 210 is rotated to drive the movable locking table 220 to rotate, the locking table 2221 is rotated to the lower part of the ball 700 and jack up the ball 700, the ball 700 is exposed from the round hole 111 and is clamped in the groove 810 in the tool handle, and a pressure is formed on the ball 700 due to extrusion of the locking table 2221, so that the tool handle is fixed on the connecting cylinder 110, and the connection between the tool and the power handle is realized; when the cutter needs to be disassembled or replaced, the rotary cylinder 210 is reversely rotated, so that the balls 700 fall into the unlocking grooves 2222, unlocking of the cutter is realized, quick pulling and inserting between the cutter and the power handle are realized in the mode, convenience and rapidness are realized, and the meaning of a quick interface is realized.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A locking assembly for securing a knife to a power handle, the locking assembly comprising a connector, a rotator and an elastic member;

one end of the connecting piece is connected with the cutter, and the other end of the connecting piece is connected with the power handle;

the connecting piece comprises a connecting cylinder (110) and a fixing cylinder (120);

the rear end of the connecting cylinder (110) is provided with an annular area (112), a plurality of round holes (111) are formed in the connecting cylinder (110) close to the annular area (112), and a plurality of bolt holes are formed in the annular area (112);

the fixed cylinder (120) comprises a front section (121), a middle section (122) and a rear section (123), wherein the front section (121) is fixedly connected with the rear end of the connecting cylinder (110), and the rear section (123) is fixedly connected with the power handle;

the rotating piece is rotatably sleeved on the connecting piece and used for locking or unlocking the cutter;

the rotating piece comprises a movable locking table (220), a rotating cylinder (210), a plurality of bolts (230) and balls (700);

the movable locking table (220) is sleeved on the front section (121) and comprises a bolt limiting part (221) and a ball movable part (222), the bolt limiting part (221) is arranged at the rear end of the movable locking table (220), the ball movable part (222) is arranged at the front end of the movable locking table (220), the ball (700) is movably arranged in the ball movable part (222), and the bolt (230) penetrates through a bolt hole of the annular area (112) and is clamped in the bolt limiting part (221);

the rotary cylinder (210) is sleeved on the fixed cylinder (120) and is clamped with the bolt limiting part (221);

the elastic piece is arranged in the connecting piece and used for limiting the cutter to move relative to the power handle in the circumferential direction.

2. The locking assembly of claim 1, wherein the locking assembly comprises a locking member,

the edge of the plug pin limiting part (221) is provided with a plurality of clamping parts (2211), the inner surface of the front end of the rotary cylinder (210) is provided with a plurality of bulges (212), and the plurality of bulges (212) are correspondingly clamped with the plurality of clamping parts (2211);

a plurality of limiting grooves (2212) are formed in the plug pin limiting part (221), and the plug pins (230) penetrate through plug pin holes of the annular region (112) and are clamped in the limiting grooves (2212);

the ball movable part (222) is provided with a plurality of movable areas, the balls are correspondingly and movably arranged in the movable areas, the movable areas comprise a locking platform (2221) and an unlocking groove (2222), the locking platform (2221) and the unlocking groove (2222) are arranged in parallel, and the side wall of the unlocking groove (2222) is an inclined plane.

3. The locking assembly according to claim 2, wherein the middle of the clamping portion (2211) is arc-shaped, two ends of the clamping portion are provided with arc-shaped grooves, two ends of the limiting groove (2212) are circular, and the middle of the limiting groove is a gentle arc shape with reduced width.

4. The locking assembly of claim 2, wherein the bolt (230) comprises a first connection (231), a second connection (232) and a third connection (233);

the second connecting portion (232) is in a truncated cone shape, a shoulder is formed between the second connecting portion (232) and the first connecting portion (231), the shoulder is attached to the inner wall of the annular region (112), and the third connecting portion (233) is inserted into the limiting groove (2212).

5. The locking assembly of claim 4, wherein the elastic member comprises a spacer (310) and a plurality of sets of springs (320), wherein a plurality of holes are formed in the side wall of the middle section of the fixed cylinder (120), the spacer (310) is disposed at the hole opening and is attached to the movable locking platform (220), and the springs (320) are disposed in the holes in a compressed state.

6. The locking assembly according to claim 1, wherein the connecting cylinder (110) is provided with a plurality of sealing rings (113), the middle section (122) of the fixed cylinder (120) is provided with a plurality of heat dissipation windows (124), and the rotating cylinder (210) is provided with a plurality of air outlets (211).

7. The locking assembly of claim 6, wherein the power handle comprises a housing (400), a motor (430), a motor output shaft (431), a cable jacket (600), and a cable jacket lock (500);

the front end of the shell (400) is fixedly connected with the rear section (123) of the fixed cylinder (120), the rear end is provided with an air inlet (410), and an air inlet channel (440) is arranged in the shell;

the motor (430) is arranged in the shell (400), the motor output shaft (431) is arranged at the front end of the motor (430), the other end of the motor output shaft (431) is connected with a power transmission part (450), and a cooling fan (420) is sleeved outside the power transmission part (450);

the cable sleeve (600) is arranged at the tail end of the power handle and is used for protecting a cable of the motor;

the cable sleeve locking piece (500) is arranged at the front end of the cable sleeve (600) and used for fixing the cable sleeve (600).

8. The locking assembly of claim 7, wherein the tool comprises a tool shank, a transmission shaft (820) is arranged in the tool shank, the transmission shaft (820) is connected to one end of the power transmission member (450), a groove (810) penetrating circumferentially is formed in the inner surface of the tool shank, and the position of the groove (810) corresponds to that of the ball (700).