Electric tool body and electric tool

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to an electric tool body and an electric tool. The electric tool main body comprises a mounting sleeve and a driving part and acts on a working part; the pushing part is used for pushing the driving part to move; and a sensing unit; wherein the pushing part is provided with a screw rod which is rotationally arranged in the mounting sleeve; the movable sleeve movably sleeves the outer side of the lead screw and is connected with the driving part; the induction part is provided with an induction piece installed at the end, away from the driving part, of the movable sleeve, and a sensor installed on the installation sleeve and used for being matched with the induction piece. According to the utility model, the sensor is mounted on the mounting sleeve, and when the mounting direction of the working part needs to be adjusted by rotating the mounting seat (a structure for mounting the working part) in the use process of the tool, the sensor mounted on the mounting sleeve cannot be influenced no matter how the mounting seat rotates, so that the sensor is protected; therefore, the sensor can be normally used.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric tool technical field, concretely relates to a kind of electric tool main body and electric tool. BACKGROUND

[0002] Electric tool is a kind of tool that is powered by power supply, and the working head at the front end is driven by transmission mechanism to work. In pipeline, power and other construction operations, different working heads can realize different functions, such as electric crimping tool, electric pipe expanding tool, electric shearing tool, etc. Taking electric crimping tool as an example, it is generally composed of power supply, motor drive mechanism and crimping pliers. The power supply supplies power to the motor drive mechanism and controls the motor drive mechanism to start to drive the crimping pliers to perform crimping work on the pipeline.

[0003] The applicant's prior utility model patent application CN116810725A discloses an electric crimping tool, which is provided with a sensing part on the roller seat, a sensor is installed on the mounting seat, and the sensor is connected to the controller located at the bottom of the tool main body through a connecting line. The roller seat moves under the drive of the driving mechanism during the working process, so the position of the sensing part can be judged by the sensor to determine whether the roller seat is at the initial position and whether it can work normally. However, the applicant found a problem in actual use: for example, when encountering some special installation conditions, it is necessary to adjust the working direction by rotating the mounting seat (including the crimping pliers, roller seat and other components installed thereon). During the rotation process, since the mounting seat rotates relative to the main body part, the connecting line on the sensor is easy to wind around or even break along the main body part and the mounting seat, which causes the sensor to be unable to use and affects the normal use of the tool. SUMMARY

[0004] To solve the above problems, the utility model provides an electric tool main body and electric tool, which install the sensor on the mounting sleeve to protect the sensor.

[0005] The utility model adopts the following technical scheme:

[0006] An electric tool main body is provided in an electric tool for driving the working components of the electric tool to work, and has the following characteristics: a housing; a mounting sleeve installed in the housing and fixed relative to the housing; a driving part acting on the working components; a pushing part for pushing the driving part to move; and a sensing part; wherein the pushing part has: a lead screw rotatably arranged in the mounting sleeve; a movable sleeve arranged on the outside of the lead screw and connected to the driving part; the sensing part has: a sensing part installed at one end of the movable sleeve away from the driving part; a sensor installed on the mounting sleeve for cooperating with the sensing part.

[0007] The utility model provides an electric tool main body, still have such characteristics, still include: driving motor, speed reducer, one end is installed on the output shaft of driving motor, the other end is combined with screw rod, wherein, the mounting sleeve has: screw rod installation part, is used for installing screw rod, speed reduction installation part is integrally arranged with screw rod installation part, is used for installing speed reducer.

[0008] The utility model provides an electric tool main body, still have such characteristics, screw rod installation part contains: guide portion, the inner wall is provided with the guide groove with the cooperation of movable sleeve, installation part is located the one end of guide portion close to speed reduction installation part, wherein, installation part inside is equipped with the installation step for installing screw rod, sensor is installed on the outer circumferential wall of installation part.

[0009] The utility model provides an electric tool main body, still have such characteristics, wherein, the one end close to speed reducer of screw rod is integrally or separately formed with annular mounting plate, plane thrust bearing is equipped between annular mounting plate and installation step, the one side of installation step away from plane thrust bearing is equipped with deep groove ball bearing, and one end of screw rod passes through deep groove ball bearing and is combined with speed reducer.

[0010] The utility model provides an electric tool main body, still have such characteristics, driving portion has: a pair of rollers, is used for acting on work part, roller seat is used for installing a pair of rollers, movable sleeve has: push rod, one end is inserted into mounting sleeve and is set on the outer periphery of screw rod, the other end extends out mounting sleeve and is fixed with roller seat, screw rod nut, movable sleeve is set on the outer periphery of screw rod, and is integrally or separately set with the one end of push rod away from roller seat, wherein, the outer circumferential surface of screw rod nut is installed with inductive piece.

[0011] The utility model provides an electric tool main body, still have such characteristics, when screw rod nut and push rod are separately set, the middle part of screw rod nut is equipped with through hole for screw rod, and the one end of push rod away from roller seat forms and is inserted into the insertion end of through hole, and the inner wall of through hole is located on the one side of action surface and still recesses and forms the clamping groove along the circumference, the clamping groove is installed with the limit stopper, and the insertion end is located between limit stopper and action surface, or, the one side of through hole is provided with the clamping hole, and the clamping hole is provided with the clamping pin, and the movable sleeve is connected with the insertion end through the clamping pin.

[0012] The utility model provides an electric tool main body, still have such characteristics, wherein, the one end close to speed reducer of driving motor is equipped with motor seat, and the motor seat is installed together with the end face of speed reduction installation part through fixing piece.

[0013] The electric tool body further has the following features: a control switch is installed on the shell; a controller is installed in the shell; a power supply is detachably installed on the shell; and a mounting seat is rotatably installed on the mounting sleeve and extends out of the shell at one end for mounting a working component; wherein the sensor, the control switch, the driving motor and the power supply are electrically connected to the controller.

[0014] The electric tool body further has the following features: a control switch is installed on the shell; a controller is installed in the shell; a power supply is detachably installed on the shell; and a mounting seat is rotatably installed on the mounting sleeve and extends out of the shell at one end for mounting a working component; wherein the sensor, the control switch, the driving motor and the power supply are electrically connected to the controller.

[0015] The electric tool body further has the following features: a control switch is installed on the shell; a controller is installed in the shell; a power supply is detachably installed on the shell; and a mounting seat is rotatably installed on the mounting sleeve and extends out of the shell at one end for mounting a working component; wherein the sensor, the control switch, the driving motor and the power supply are electrically connected to the controller.

[0016] Practical effects

[0017] According to the electric tool body, when the mounting seat (a structure for mounting the working component) needs to be rotated to adjust the installation direction of the working component during use of the tool, the sensor installed on the mounting sleeve is not affected by rotation of the mounting seat, and the sensor is protected to ensure normal use of the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural diagram of the electric crimping tool of the embodiment 1 of the utility model.

[0019] Figure 2 is a structural diagram of the electric tool body after removal of part of the shell.

[0020] Figure 3 is a sectional view of the mounting seat and the driving mechanism installation structure of the embodiment 1 of the utility model.

[0021] Figure 4 is a structural diagram of the lead screw.

[0022] Figure 5 is a structural diagram of the mounting sleeve of the embodiment 1 of the utility model.

[0023] Figure 6 is a schematic diagram of the roller seat installation structure.

[0024] Figure 7 is a structural diagram of the lead screw nut.

[0025] Figure 8 is Figure 3 is a local enlarged view of A of

[0026] Figure 9 is the sectional view of the screw rod nut of the utility model.

[0027] Figure 10 is Figure 3 the partial enlarged view of B of the utility model.

[0028] Figure 11 is the sectional schematic view of the push rod and the screw rod nut mounting structure of the utility model embodiment 2.

[0029] Figure 12 is the structure diagram of the mounting sleeve of the utility model embodiment 3.

[0030] Reference signs: electric crimping tool 100, main body 10, shell 11, display screen 12, working mechanism 20, crimping pliers 21, clamping jaw 211, recess 212, mounting seat 22, mounting section 221, driving mechanism 30, roller 31, roller seat 32, screw 321, screw rod 33, threaded section 331, annular mounting plate 332, push rod 34, connecting head 341, insertion end 342, screw rod nut 35, through hole 351, mounting recess 352, acting surface 353, helical groove 354, mounting hole 355, reverser 356, clamping groove 357, sliding bar 358, bolt 359, mounting sleeve 36, mounting notch 361, screw rod mounting part 362, guide part 3621, mounting part 3622, guide groove 3623, mounting step 3624, speed reducer mounting part 363, limiting clamping piece 37, bearing 38, clamping spring 381, ball 39, power supply 40, control board 41, driving motor 51, output shaft 511, motor seat 512, motor gear 513, speed reducer 52, primary inner ring gear 521, secondary and tertiary inner ring gears 522, primary planetary carrier 523, primary planetary gear 524, secondary planetary carrier 525, secondary planetary gear 526, tertiary planetary carrier 527, tertiary planetary gear 528, planar thrust bearing 53, deep groove ball bearing 54, inductive piece 61, sensor 62, screw 621, wire 63, button 71, switch element 72, wire 73. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the electric tool main body and electric tool of the utility model are specifically described below in combination with embodiments and drawings.

[0032] <Embodiment 1>

[0033] As Figure 1As shown in the drawings, the embodiment provides an electric tool, in particular an electric crimping tool 100, which comprises a main body 10 and a working component, the main body 10 is an electric tool main body, and the working component is a crimping clamp 21, which is detachably installed at the front end of the main body 10 and can perform crimping work on pipes under the driving of the main body 10.

[0034] As Figure 2 shown, the main body 10 at least comprises a shell 11, a working mechanism 20 acting on the crimping clamp 21, a driving mechanism 30 for driving the working mechanism 20 to work, a control mechanism for controlling the working of the driving mechanism 30, and a switch mechanism. In the embodiment, the shell 11 is a vertically extending shell formed by two half shells fixed to each other by screws, which is hollow inside for installing the driving mechanism 30, the front end (which can be the top end) is installed with the crimping clamp 21, and the rear end (which can be the bottom end) is installed with the control mechanism, the control mechanism has a power supply 40 for power supply and a control board 41, and the switch mechanism has a button 71 and a switch element 72 arranged on the shell 11, the switch element 72 is electrically connected to the control board 41 through a wire 73, and the internal switch element 72 is opened by pressing the button 71.

[0035] The power supply 40 is detachably installed at the bottom of the shell 11, the control board 41 and the driving mechanism 30 are installed inside the shell 11, the control board 41 is located at the opening at the bottom of the shell 11 for easy connection with the power supply, and a display screen 12 is arranged on the outer side of the control board 41 at the bottom of the shell 11 for displaying relevant working information of the tool. The driving mechanism 30 is installed above the control board 41, and the working mechanism 20 is installed at the front end of the driving mechanism 30 and extends out of the shell 11. The working mechanism 20 has a mounting seat 22, the crimping clamp 21 has a pair of symmetrical clamping jaws 211, the front end of the clamping jaw 211 forms a notch 212 for clamping workpieces, and the pair of clamping jaws 211 can rotate under the driving of the driving mechanism 30 to perform crimping on the workpieces in the notch 212; the rear end of the mounting seat 22 is located inside the shell 11 and is provided with a mounting section 221 for mounting the driving mechanism 30, and the front end extends out of the shell 11 and is detachably connected with the crimping clamp 21 for easy disassembly and replacement of the crimping clamp 21.

[0036] As Figure 3As shown, the driving mechanism 30 comprises a pushing part for driving the driving part to move, a driving motor 51 and a speed reducer 52 for driving the pushing part, a sensing part and a mounting sleeve 36. The driving part has a pair of rollers 31 acting on the crimping pliers 21 and a roller seat 32 for mounting the rollers 31. The pushing part has a screw rod 33 and a movable sleeve. The screw rod 33 is mounted in the mounting sleeve 36, one end of the speed reducer 52 is combined with the screw rod 33, the other end is mounted on the output shaft 511 of the driving motor 51, and the speed reducer 52 is built in the mounting sleeve 36. The driving motor 51 is located at one end of the output shaft 511 and is provided with a motor seat 512. The motor seat 512 is fixed with the end of the mounting sleeve 36 by screws. The driving motor 51 is electrically connected with a control board. The control board controls the driving motor to work. The screw rod 33 rotates under the driving of the driving motor 51 or the speed reducer 52.

[0037] As shown in the figure, Figure 4 The outer periphery of the screw rod 33 is formed with a threaded segment 331. The movable sleeve is sleeved on the threaded segment 331. Under the action of the threaded segment 331 during the rotation of the screw rod 33, the movable sleeve moves axially along the screw rod 33. One end of the movable sleeve extends out of the mounting sleeve 36 and is fixed to the roller seat 32 of the pushing part. When the movable sleeve moves axially, it drives the roller seat 32 and the rollers 31 to move, thereby realizing the work of the crimping pliers 21.

[0038] The sensing part has a sensing piece 61 and a sensor 62. The sensing piece 61 is selected from an inductive magnet and is mounted on the end of the movable sleeve away from the pushing part. The sensor 62 is selected from a Hall sensor and is mounted on the mounting sleeve 36 for sensing the position of the inductive magnet and is electrically connected with the control board 41 through a wire 63. The sensor 62 transmits signals to the control board 41, which controls the driving motor 51 to work. As shown in the figure, Figure 2 The mounting sleeve 36 is mounted inside the housing 11. An installation recess 361 is formed on the outer peripheral surface of the middle part of the mounting sleeve 36. The sensor 62 is fixed in the installation recess 361 by screws 621. The sensing piece 61 has an initial zero position. When the sensing piece 61 is at the initial zero position, the crimping pliers are in an open state. When the tool is started, the motor is first reversed to make the driving part return to the initial zero position, and then the rollers are controlled to extend out to make the crimping pliers gradually close to realize the crimping of the workpiece.

[0039] In this embodiment, as shown in the figures, Figure 3 , Figure 5 and Figure 10As shown, the mounting sleeve 36 is a one-piece sleeve structure, and has a screw mounting portion 362 for mounting the screw 33, and a reduction mounting portion 363 integrally provided with the screw mounting portion 362 for mounting the reducer 52. That is, the reduction box housing for mounting the reducer 52 and the mounting housing for mounting the screw are made into a one-piece structure, greatly simplifying the mounting structure, reducing cost, and making the structure more compact and stable, which is conducive to product miniaturization and light weight. The screw mounting portion 362 includes a guide portion 3621 and a mounting portion 3622, the guide portion 3621 is located at the end of the mounting portion 3622 away from the reduction mounting portion 363, and a plurality of guide grooves 3623 cooperating with the movable sleeve are formed in the inner wall of the guide portion 3621, and the mounting portion 3622 is internally provided with a mounting step 3624 for mounting the screw 33, and an annular mounting plate 332 (as shown in Figure 4 The annular mounting plate 332 is integrally provided with the screw 33), and a plane thrust bearing 53 (also referred to as a plane needle bearing) is arranged between the annular mounting plate 332 and the mounting step 3624, a deep groove ball bearing 54 is arranged on the side of the mounting step 3624 away from the plane thrust bearing 53, and one end of the screw 33 passes through the deep groove ball bearing 54 (also referred to as a ball bearing) and is combined with the reducer 52. The selection of the plane thrust bearing 53 not only cooperates with the deep groove ball bearing 54 to form a stable installation between the screw 33 and the mounting portion 3622, but also offsets the residual stress in the axial direction of the screw 33, so that the screw 33 is more stable and is protected.

[0040] The outer wall of the mounting portion 3622 is provided with the mounting notch 361 for mounting the sensor 62, and in this embodiment, the mounting notch is shaped like a racetrack, and the sensor 62 is mounted in an embedded manner. When the sensor 62 is mounted in this way, it is closer to the control panel 41, and since the mounting sleeve 36 is built into the housing 11 and remains relatively fixed relative to the housing 11, even if the working angle of the crimping head needs to be adjusted during use, the sensor 62 will not be affected, thereby ensuring normal use of the sensor 62.

[0041] The movable sleeve includes a push rod 34 and a screw nut 35 which are integrally provided or combined, and in this embodiment, the screw nut 35 is provided at one end of the push rod 34. The push rod 34 has a structure with one end sealed and the other end open, and the sealed end is formed with a connector 341, and the other end is provided with a threaded hole 342 for mounting the screw nut 35, and the screw nut 35 is provided with a threaded hole 351 passing through the middle portion for the screw 33 to pass through, and a sensing element 61 is mounted on the outer circumferential surface near the bottom of the screw nut 35. Figure 6As shown, the connecting head 341 extends out of the mounting sleeve 36 and is fixed to the roller seat 32 by the screw 321, so as to realize the connection between the push rod 34 and the roller seat 32; the push rod 34 is hollow inside, and the open end is sleeved outside the end of the screw rod 33 away from the speed reducer 52.

[0042] As shown in the figure, Figure 8 As shown, the open end of the push rod 34 extends into the through hole 351 of the screw rod nut 35 to form an extending end 342, which is an annular boss structure, the push rod 34 is connected with the screw rod nut 35 through the annular boss structure, the screw rod nut 35 is arranged at the end of the push rod 34 (i.e. the screw rod nut 35 is located at the end of the push rod 34 away from the roller seat 32), the push rod 34 can drive the roller seat 32 to move during the rotation of the screw rod 33, so as to make the roller 31 push the crimping pliers 21 to work. The roller 31 will contact the inner end of the jaw 211 during movement, and the jaw 211 will rotate around the central rotating shaft under the pushing force of the roller 31, so as to make the crimping pliers 21 close, and the workpiece is crimped. Since the structure and principle of using the roller to drive the crimping pliers to work are prior art, they will not be described in detail here. The mounting sleeve 36 is arranged outside the screw rod 33, the push rod 34 and the screw rod nut 35, and the end thereof is connected with the mounting seat 22. The end of the mounting sleeve 36 close to the roller seat 32 is threadedly connected to the mounting section 221 of the mounting seat 22, the inside of the mounting sleeve 36 is hollow, the screw rod 33 and the screw rod nut 35 are enclosed inside the guiding sleeve 36, a gap for the push rod 34 and the screw rod nut 35 to move is formed between the inner wall of the mounting sleeve 36 and the outer wall of the screw rod 33, so that a closed space is formed between the push rod 34, the screw rod nut 35 and the mounting sleeve 36, and the screw rod 33 is located in the closed space, which further protects the screw rod 33 from dust and impurities.

[0043] As shown in the figure, Figures 7-9 As shown, the end of the through hole 351 of the screw rod nut 35 close to the push rod 34 is provided with a mounting groove 352, the bottom of the mounting groove 352 forms an annular acting surface 353, the lower end surface of the extending end 342 of the push rod 34 abuts against the annular acting surface 353, and the two interact with each other, so that the screw rod nut 35 can push the push rod 34 to move towards the direction where the roller seat 32 is located under the action of the screw rod 33. As shown in the figure, Figure 8 As shown, the specific mounting structure of the screw rod nut 35 and the push rod 34 is that the inner wall of the through hole 351 is recessed along the circumference on the side of the acting surface 353 to form a clamping groove 357, a limiting clamping piece 37 is installed in the clamping groove 357, the screw rod nut 35 is connected with the push rod 34 through the limiting clamping piece 37, so that the extending end 342 is located between the limiting clamping piece 37 and the acting surface 353.

[0044] The moving direction of the push rod 34 has two directions, one is the direction of moving the roller seat 32 towards the crimping pliers 21, which is called the advancing direction, and the other is the direction opposite to the advancing direction, which is called the retreating direction. As shown in Figure 8 , the movement of the push rod 34 towards the advancing direction is realized by the action of the action surface 353 of the screw nut 35 on the lower end surface of the extended end 342 of the push rod 34, which has the characteristics of large bearing force, facilitating the bearing of large advancing force during work; the movement of the push rod 34 towards the retreating direction is realized by the action of the end structure of the screw nut 35 and the limiting clamp 37 at the extended end 342, at this time, the stress is relatively small, and it is not easy to affect the service life of the limiting clamp 37.

[0045] As shown in Figure 3 and Figure 9 , the inner wall of the through hole 351 is provided with a threaded matching part (i.e. a spiral groove 354) matched with the surface threaded segment 331 of the lead screw 33, the threaded matching part and the threaded segment 331 are provided with a ball 39 therebetween, and a mounting hole 355 is formed on the screw nut 35 for mounting a reverser 356, which forms an inner circulating ball screw structure in combination with the lead screw 33. The outer periphery of the screw nut 35 is further provided with a sliding strip 358 (which can also be a spline tooth structure), and the guide groove 3623 (which can also be a spline groove structure matched with the spline tooth) provided on the inner wall of the guide portion 3621 can be matched with the sliding strip 358, so that the screw nut 35 can stably move axially along the inner wall of the guide portion 3621 of the mounting sleeve 36, and has a good guiding and stabilizing effect.

[0046] As shown in Figure 3 , the end portion of the lead screw 33 located inside the push rod 34 is further provided with a bearing 38, and the bearing 38 is fixed on the lead screw 33 through a snap spring 381. The bearing 38 is located between the top end of the lead screw 33 and the inner wall of the push rod 34, which not only makes the rotation of the lead screw 33 more stable, but also limits the stroke of the screw nut 35, avoids the screw nut 35 from being separated from the lead screw 33, and makes the structure more stable.

[0047] As shown in Figure 3 and Figure 10As shown, the control motor 51 of the embodiment is a non-inductive brushless motor. Compared with the traditional inductive motor (with Hall element), the non-inductive brushless motor reduces the layout of the circuit and the number of parts. In high-power power tools, heat is easy to affect electrical components, so the use of non-inductive brushless motors has a longer service life. The non-inductive brushless motor contains an output shaft 511, and a motor gear 513 is installed on the output shaft 511. The reducer 52 is installed on the motor gear 513. Specifically, the reducer 52 is a three-stage planetary structure, which is installed in the reduction installation part 363 of the installation sleeve 36. The three-stage planetary structure includes a first inner tooth ring 521, a second and third inner tooth ring 522, a first planetary carrier 523, a first planetary gear 524, a second planetary carrier 525, a second planetary gear 526, a third planetary carrier 527, and a third planetary gear 528. The first inner tooth ring 521 and the second and third inner tooth ring 522 are stacked and installed in close contact with the inner wall of the reduction installation part 363. The first planetary gear 524 is installed on the first planetary carrier 523 and engages with the motor gear 513. The second planetary gear 526 is installed on the second planetary carrier 525 and engages with the first planetary carrier 523. The third planetary gear 528 is installed on the third planetary carrier 527 and engages with the second planetary carrier 525. A hole is formed in the middle of the third planetary carrier 527 for inserting the lower end of the lead screw 33. The lower end of the lead screw 33 is clamped in the middle of the third planetary carrier 527 by a snap spring. The deep groove ball bearing 54 is arranged between the top end of the third planetary carrier 527 and the installation step 3624.

[0048] The working principle of the embodiment is as follows:

[0049] Press the button 71 to start the tool. The motor first reverses to drive the lead screw 33 to rotate in the opposite direction, prompting the push rod 34 to drive the driving part to return to the initial zero position. After the sensor 62 senses that the sensing part 61 returns to the initial zero position, it transmits a signal to the control panel 41. The control panel 41 controls the motor to rotate in the forward direction, and the lead screw 33 rotates in the forward direction, prompting the push rod 34 to drive the driving part to move towards the direction where the crimping pliers 21 are located. The roller 31 contacts and drives the clamping jaw 211 of the crimping pliers 21 to rotate, and the workpiece is subjected to crimping.

[0050] <Embodiment 2>

[0051] The embodiment is basically the same as the above-mentioned embodiment 1, except for the connection structure of the extension end 342 of the push rod 34 and the lead screw nut 35. The lead screw nut 35 has a through hole 351 in the middle for the lead screw 33 to pass through, and an installation groove is arranged at one end of the through hole 351 close to the push rod 34. The bottom of the installation groove forms an annular action surface 353, which abuts against the end face of the extension end of the push rod 34. The two interact with each other, so that the lead screw nut 35 can move the push rod 34 towards the direction of the roller seat 32 under the action of the lead screw 33. Figure 11As shown, the specific mounting structure of the screw nut 35 and the push rod 34 in this embodiment is that the through hole 351 is provided with a latch 359 on one side of the acting surface 353, one end of the latch 359 is inserted into the extended end 342 of the push rod 34, and the screw nut 35 and the push rod 34 are connected through the latch 359. The moving direction of the push rod 34 has two directions, one is the direction of moving the roller holder 32 towards the crimping pliers 21, which is called the advancing direction, and the other is the direction opposite to the advancing direction, which is called the retreating direction. The movement of the push rod 34 towards the advancing direction is realized by the acting surface 353 of the screw nut 35 acting on the end surface of the extended end 342 of the push rod 34 to advance; the movement of the push rod 34 towards the retreating direction is realized by the latch 359 on the screw nut 35 acting on the extended end 342 to retreat.

[0052] <Embodiment 3>

[0053] This embodiment is basically the same as the above-mentioned embodiments 1 and 2, and the difference lies in the shape of the mounting notch 361 for installing the sensor 62 in the middle of the mounting sleeve 36. In embodiment 1, as shown in Figure 5 , the shape profile of the mounting notch 361 is a racetrack shape with semicircular shapes at both ends, while in this embodiment, as shown in Figure 12 , the shape profile of the mounting notch 361 is semicircular at one end and linear at the other end. The design of different shapes at both ends can prevent incorrect installation during installation.

[0054] Effects of the embodiment:

[0055] According to the electric tool and the main body of the above-mentioned embodiments, since the sensor 62 is installed on the mounting sleeve 36, and the corresponding sensing member 61 is installed on the movable sleeve, when the installation direction of the working part needs to be adjusted by rotating the mounting seat 22 (a structure for installing the working part) during use of the tool, no matter how the mounting seat 22 is rotated, it will not affect the sensor 62 installed on the mounting sleeve 36 (i.e. the wire connected to the control panel of the sensor 62 will not be twisted or broken due to rotation), which protects the sensor 62 to ensure that the sensor 62 can be used normally.

[0056] Further, the mounting sleeve 36 is designed integrally for installing the screw rod 33 and the speed reducer 52, which cancels the separate speed reducer 52 shell, simplifies the structure, reduces the cost, and makes the entire screw rod 33 rotating structure more stable.

[0057] Further, since the screw rod 33 is arranged in the housing 11, and the push rod 34 and the screw nut 35 are sleeved on the outer periphery of the screw rod 33, a relatively closed space is formed on the inner periphery of the guide sleeve, which can prevent dust from entering and affecting the screw rod 33, and protect the screw rod 33.

[0058] Further, since the hardness required by the push rod 34 in actual work is smaller than that of the screw nut 35, the push rod 34 and the screw nut 35 are arranged separately in the above embodiment, and different hardness materials are selected for the two, so that the cost and demand can be reduced to a certain extent.

[0059] Further, since the control motor is the inductanceless brushless motor 51, compared with the traditional inductance motor (with a Hall element), the layout of the circuit and the parts are reduced, and in the high-power electric tool, since the heat easily affects the electrical elements, the inductanceless brushless motor has a longer service life.

[0060] The above embodiment is only used for illustrating the specific implementation of the present application, and the present application is not limited to the description range of the above embodiment. For example, in the case provided in the above embodiment, the push rod and the movable sleeve are arranged separately, and in the actual case, the push rod and the movable sleeve can be arranged integrally; similarly, in the above embodiment, the screw rod and the annular mounting plate thereon are arranged integrally, and in the actual case, the screw rod and the annular mounting plate thereon can be arranged separately. In the case provided in the above embodiment, the working component is taken as the crimping pliers, and in the actual case, the working component can be replaced by a shearing head or the like, that is, the working component is replaced according to different working environments and requirements.

Claims

1. A power tool body, disposed within a power tool, for driving the working parts of the power tool to perform operations, characterized in that, include: shell; The mounting sleeve is installed inside the housing and fixed relative to the housing; The drive unit acts on the working component; A driving part, used to drive the driving part to move; and Sensing unit; The pushing part has: The lead screw is rotatably mounted inside the mounting sleeve; A movable sleeve is provided on the outside of the lead screw and is connected to the drive unit; The sensing unit has: The sensor is installed at the end of the movable sleeve furthest from the drive unit. The sensor is mounted on the mounting sleeve and is used to cooperate with the sensing element.

2. The power tool body according to claim 1, characterized in that, Also includes: Drive motor, The speed reducer is mounted on the output shaft of the drive motor at one end and connected to the lead screw at the other end. The mounting sleeve has the following features: Lead screw mounting part, used to mount the lead screw. The speed reduction mounting part is integrally formed with the lead screw mounting part and is used to install the speed reducer.

3. The power tool body according to claim 2, characterized in that, The lead screw mounting part includes: The guide section has a guide groove on its inner wall that mates with the movable sleeve. The mounting section has an internal mounting step for mounting the lead screw, and the sensor is mounted on the outer peripheral wall of the mounting section.

4. The power tool body according to claim 3, characterized in that, in, The lead screw has an integral or separate annular mounting plate at one end near the reducer. A planar thrust bearing is provided between the annular mounting plate and the mounting step. A deep groove ball bearing is provided on the side of the mounting step away from the planar thrust bearing. One end of the lead screw passes through the deep groove ball bearing and is connected to the reducer.

5. The power tool body according to any one of claims 1-4, characterized in that, The drive unit has: A pair of rollers, for action on the working part, Roller seat, for mounting the pair of rollers, The active sleeve has: The push rod has one end inserted into the mounting sleeve and fitted around the outer circumference of the lead screw, and the other end extending out of the mounting sleeve and fixed to the roller seat. The lead screw nut is movably sleeved on the outer circumference of the lead screw, and is either integrally formed with or separate from the end of the push rod away from the roller seat. The sensing element is installed on the outer peripheral surface of the lead screw nut.

6. The power tool body according to claim 5, characterized in that, When the lead screw nut and the push rod are separately set, the lead screw nut has a through hole in the middle for the lead screw to pass through, and the end of the push rod away from the roller seat has an extension end that extends into the through hole. The through hole has a working surface for abutting against one end face of the extension end. The inner wall of the through hole is also recessed circumferentially on one side of the working surface to form a groove, in which a limiting device is installed, and the extended end is located between the limiting device and the working surface. Alternatively, a locking hole is provided on one side of the working surface of the through hole, and a locking pin is provided in the locking hole, through which the movable sleeve is connected to the inserted end.

7. The power tool body according to any one of claims 2-4, characterized in that, in, The drive motor has a motor mount at one end near the reducer, and the motor mount is installed together with the end face of the reducer mounting part by a fastener.

8. The power tool body according to any one of claims 2-4, characterized in that, Also includes: The control switch is mounted on the housing; The controller is installed inside the housing; The power supply is detachably mounted on the housing. as well as The mounting base is rotatably mounted on the mounting sleeve, and one end extends out of the housing for mounting the working component; The sensor, the control switch, the drive motor, and the power supply are all electrically connected to the controller.

9. The power tool body according to claim 8, characterized in that, in, A display screen is provided on the outer casing near the location of the controller.

10. A power tool, characterized in that, include: main body, The working component is detachably mounted on the main body and operates under the drive of the main body. The main body is the power tool body as described in any one of claims 1-9.

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