Main body of the power tool and power tool

Abstract

A power tool main body installed in a power tool and used to drive the working component of the power tool, having and comprising the following features: Housing; Mounting sleeve mounted in the housing and fixed relative to the housing; Drive unit acting on the working component; Thrust unit used to move the drive unit, and sensor unit; The thrust unit includes: Spindle arranged to rotate in the mounting sleeve; The movable sleeve, the movable sleeve is arranged on the outside of the spindle and connected to the drive unit; The sensor unit includes: Sensor component mounted at the end of the movable sleeve, away from the drive unit, Sensor that is mounted on the mounting sleeve and works together with the sensor component.

Description

Technology area

[0001] The utility model belongs to the technology field of power tools and relates in particular to a main body of the power tool and a power tool. Technical background

[0002] A power tool is a tool powered by a power source that uses a gear mechanism to control the working head at the front of the tool to perform work. In construction work such as piping and electricity, a variety of different functions can be realized by using different working heads, such as electric crimping tools, electric pipe expanding tools, electric cutting tools, and so on. Taking an electric crimping tool as an example, it generally consists of a power source, a motor drive mechanism, and a crimping pliers. The power source supplies power to the motor drive mechanism and controls the motor drive mechanism to start, driving the crimping pliers, which are then used to crimp pipes.

[0003] The applicant's prior utility model application CN116810725A discloses an electric crimping tool equipped with a sensor component on the roller seat. The sensor is mounted on the mounting seat, which is connected to the control unit at the bottom of the tool's main body via a connecting line. The roller seat moves during operation under the action of the drive mechanism. Therefore, the sensor can detect the position of the sensor component to check whether the roller seat is in the home position and whether it is functioning properly.However, in practical use, the applicant has encountered a problem with the above-described structure: under certain special assembly conditions, when the mounting seat (including the crimping tool, roller seat, and other parts mounted thereon) needs to be rotated to adjust the working direction, the sensor's connecting lines will become entangled or even torn during the rotation process due to the rotation of the mounting seat relative to the main body. This will cause the sensor to become inoperable and affect the normal use of the tool. Invention content

[0004] In order to solve the above problems, the utility model provides a main body of the power tool and power tool in which a sensor is installed on a mounting sleeve to protect the sensor.

[0005] The utility model incorporates the following technical solutions: A power tool main body installed in a power tool and used to drive the working component of the power tool, comprising: a housing; a mounting sleeve mounted in the housing and fixed relative to the housing; a drive unit acting on the working component; a thrust unit for moving the drive unit; and a sensor unit. The thrust unit comprises: a spindle rotatably mounted in the mounting sleeve; a movable sleeve. The movable sleeve is mounted externally on the spindle and connected to the drive unit. The sensor unit comprises: a sensor component mounted on the end of the movable sleeve, remote from the drive unit; and a sensor mounted on the mounting sleeve and cooperating with the sensor component.

[0006] The main body of the power tool proposed in this utility model further has such features and further includes: a drive motor; a reduction gear, one end of which is mounted on the output shaft of the drive motor and the other end of which is combined with the spindle. The mounting sleeve includes: a spindle mounting portion for mounting the spindle; a reduction gear mounting portion integrally formed with the spindle mounting portion and for mounting the reduction gear.

[0007] The main body of the power tool proposed in this utility model further includes the following features: The spindle mounting portion includes a guide portion, the inner wall of which is provided with a guide groove that mates with the movable sleeve; and a mounting portion located at the end of the guide portion near the reduction gear mounting portion. A mounting step is provided inside the mounting portion for installing the spindle, and a sensor is mounted on the outside of the mounting portion.

[0008] The main body of the power tool proposed in this utility model also has the following features: At the end of the spindle closest to the reduction gear, an annular mounting plate is provided, either as a one-piece or two-piece construction. A flat bearing is located between the annular mounting plate and the mounting stage, and a deep groove ball bearing is mounted on the side of the mounting stage opposite the flat bearing. One end of the spindle passes through the deep groove ball bearing and connects to the reduction gear.

[0009] The main body of the power tool proposed in this utility model also has such features: The drive unit includes: a pair of rollers for acting on the working member; a roller seat for mounting a pair of rollers; The movable sleeve includes: a push rod, one end of which engages with the mounting sleeve and wraps around the outer side of the spindle, while the other end protrudes from the mounting sleeve and is connected to the roller seat; a spindle nut mounted on the outer region of the spindle; and the movable sleeve is provided on the side of the spindle remote from the roller seat, either as a one-piece or two-piece structure. A sensor component is mounted on the outer side of the spindle nut.

[0010] The main body of the power tool proposed in this utility model also has such features: when the spindle nut and the push rod are arranged separately, the center of the spindle nut is provided with a through hole through which the spindle is passed. The end of the push rod remote from the roller seat forms a spigot end that engages with the through hole. The through hole has an engaging surface that comes into contact with the end surface of the spigot end. On the inner side of the through hole, on the engaging surface side, a recess is machined along the circumference to form a locking groove into which a limiting lock is inserted. The spigot end is located between the limiting lock and the engaging surface. Alternatively, a locking hole may be provided on the engaging surface side of the through hole, into which a locking pin is inserted to connect the movable sleeve to the spigot end.

[0011] The main body of the power tool proposed in this utility model also has the following features: A motor seat is provided at the end of the drive motor closer to the reduction gear. This motor seat is mounted to the end surface of the reduction gear mounting portion by a fastener.

[0012] The power tool main body proposed in this utility model further includes such features and further includes: a control switch mounted on the housing; a controller installed in the housing; a power source detachably mounted on the housing; and a mounting seat rotatably mounted on the mounting sleeve, one end of which extends from the housing for installing the working component. The sensors, control switch, drive motor, and power source are all electrically connected to the controller.

[0013] The main body of the power tool proposed in this utility model also has the following features: A display is provided on the housing, near the controller.

[0014] The main body of the power tool proposed in this utility model further has such features and includes: main body, working member detachably mounted on the main body and working under the drive of the main body, wherein the main body is a main body of the power tool as described above. Functions and effects of utility models

[0015] According to the main body of the utility model power tool, the sensor is installed on the mounting sleeve. During use of the tool, when the mounting direction of the working component needs to be adjusted by rotating the mounting seat (the structure for mounting the working component), the rotation of the mounting seat does not affect the sensor mounted on the mounting sleeve. This protects the sensor and ensures its normal use. Explanation of the figures Fig. 1 shows a structural diagram of an electrical crimping tool according to Embodiment 1 of the utility model. Fig. 2 is a structural diagram of the main body of the utility model power tool after a part of the casing is removed. Fig. 3 is a cross-sectional view of the mounting structure of the mounting seat and drive mechanism according to Embodiment 1 of the utility model. Fig. 4 is a simplified structural diagram of the spindle of the utility model. Fig. 5 is a simplified structural diagram of the mounting sleeve according to Embodiment 1 of the utility model. Fig. 6 is a schematic diagram of the assembly structure of the roller seat of the utility model. Fig. 7 is a simplified structural diagram of the spindle nut of the utility model. Fig. 8 a partially enlarged view at A of Fig. 3. Fig. 9 a cross-sectional view of the spindle nut of the utility model. Fig. 10 a partially enlarged view at B of Fig. 3. Fig. 11 is a schematic cross-sectional view of the mounting structure of the push rod and the spindle nut according to Embodiment 2 of the utility model. Fig. 12 is a simplified structural diagram of the mounting sleeve according to Embodiment 3 of the utility model. Fig. 13 is a cross-sectional view of the mounting structure of the spindle according to Embodiment 4 of the utility model.

[0016] List of figures: Electric Crimping Tool 100, Main Body 10, Housing 11, Display 12, Working Mechanism 20, Crimping Pliers 21, Clamping Jaw 211, Notch 212, Mounting Seat 22, Mounting Segment 221, Drive Mechanism 30, Rollers 31, Roller Seat 32, Screw 321, Spindle 33, Threaded Section 331, Annular Mounting Plate 332, Push Rod 34, Connecting Head 341, Insertion End 342, Spindle Nut 35, Through Hole 351, Mounting Groove 352, Effective Surface 353, Spiral Groove 354, Mounting Hole 355, Reverse Mechanism 356, Latch Groove 357, Slide Latch 358, Latch 359, Mounting Sleeve 36, Mounting Notch 361, Spindle Mounting Area 362, Guide Area 3621, Mounting Area 3622, guide groove 3623, mounting step 3624, reducer mounting area 363, limit bar 37, bearing 38, spring clip 381, ball 39, power source 40, control plate 41, drive motor 51, output shaft 511, motor seat 512, motor gear 513, reducer 52, first internal gear 521, second and third internal gear 522,first planet carrier 523, first planet gear 524, second planet carrier 525, second planet gear 526, third planet carrier 527, third planet gear 528, flat bearing 53, deep groove ball bearing 54, sensor component 61, sensor 62, screw 621, line 63, button 71, switching element 72, line 73., Concrete implementation

[0017] In order to easily understand the technical means, creative features, objects and effects of the utility model, the main body of the power tool and the power tool of the utility model are explained in detail below in conjunction with the embodiments and figures. <Ausführungsbeispiel 1>

[0018] As in Fig. 1, this embodiment proposes a power tool, specifically, an electric crimping tool 100. The electric crimping tool 100 includes a main body 10 and a working member, wherein the main body 10 is a main body of the power tool, and the working member is a crimping pliers 21. The crimping pliers 21 is detachably mounted on the front end of the main body 10 and can perform crimping work on pipes under the drive of the main body 10.

[0019] As in Fig. As shown in Figure 2, the main body 10 includes at least a housing 11, a working mechanism 20 acting on the crimping tool 21, a drive mechanism 30 for driving the working mechanism 20 to operate, a control mechanism for controlling the driving mechanism 30 to operate, and a switching mechanism. In this embodiment, the housing 11 is a vertically extended housing body consisting of two front and rear housing parts fastened together by screws, and the inner part is hollowed out to mount the driving mechanism 30. The crimping tool 21 is mounted on the front side (which may also be the top side), while the control mechanism is installed on the rear side (which may also be the bottom side). The control mechanism includes a power source 40 and a control board 41.The switching mechanism comprises a button 71 mounted on the housing 11 and a switching element 72, wherein the switching element 72 is electrically connected to the control board 41 via lines 73. Pressing the button 71 activates the internal switching element 72.

[0020] Among them, the power source 40 is detachably installed at the bottom of the housing 11. The control plate 41 and the drive mechanism 30 are installed inside the housing 11. The control plate 41 is located at the bottom opening of the housing 11, which is convenient for connection with the power source. The outside of the housing 11 near the control plate 41 is provided with a display 12 for displaying relevant working information of the tool. The drive mechanism 30 is mounted above the control plate 41, and the working mechanism 20 is mounted on the front end of the drive mechanism 30 and extends out of the housing 11. The working mechanism 20 has a mounting seat 22, and the crimping pliers 21 have a pair of symmetrically arranged jaws 211. The front end of the jaws 211 forms a notch 212 for holding the workpiece.The pair of jaws 211 can be rotated under the movement of the drive mechanism 30 to crimp the workpiece in the notch 212; the rear end of the mounting seat 22 is located in the housing 11 and is provided with a mounting segment 221 for mounting the drive mechanism 30, and the front end extends from the housing 11 and is detachably connected to the crimping pliers 21, thereby enabling easy removal and replacement of the crimping pliers 21.

[0021] As in Fig. 3, the drive mechanism 30 includes a thrust unit for driving the drive unit to move, a drive motor 51 and a reducer 52 for driving the thrust unit, a sensor unit, and a mounting sleeve 36. Among them, the drive unit has a pair of rollers 31 acting on the crimping pliers 21 and a roller seat 32 for mounting the rollers 31. The thrust unit has a spindle 33 and a movable sleeve. The spindle 33 is mounted in the mounting sleeve 36, one end of the reducer 52 is combined with the spindle 33, and the other end is mounted on the output shaft 511 of the drive motor 51, and the reducer 52 is installed in the mounting sleeve 36. The drive motor 51 is located at the end of the output shaft 511, to which a motor seat 512 is attached. The motor seat 512 is connected to the end portion of the mounting sleeve 36 by screws.The drive motor 51 is electrically connected to the control board, which controls the drive motor to operate. Under the movement of the drive motor 51 and the reduction gear 52, the spindle 33 is rotated.

[0022] As in Fig. As shown in Figure 4, a threaded portion 331 is formed on the outer periphery of the spindle 33, and the movable sleeve is disposed on the threaded portion 331. During the rotation of the spindle 33, under the action of the threaded portion 331, the movable sleeve moves axially along the spindle 33. One end of the movable sleeve extends from the mounting sleeve 36 and is fixed to the roller seat 32 of the thrust unit. As the movable sleeve moves axially, it drives the roller seat 32 and rollers 31 to move, thereby driving the crimping tool 21.

[0023] The sensor unit has a sensor component 61 and a sensor 62. The sensor component 61 selects an induction magnet and is installed at one end of the movable sleeve remote from the thrust unit. The sensor 62 is a Hall sensor mounted on the mounting sleeve 36 to detect the position of the induction magnet and is electrically connected to the control plate 41 via a line 63. The sensor 62 transmits a signal to the control plate 41, and the control plate 41 then controls the drive motor 51 to operate the tool. As shown in Fig. As shown in Figure 2, the mounting sleeve 36 is mounted inside the housing 11, and a mounting notch 361 is opened in the outer peripheral surface of the middle part of the mounting sleeve 36. The sensor 62 is fixed in the mounting notch 361 by means of a screw 621. The sensor component 61 has a home zero position. When the sensor component 61 is in the home zero position, the crimping tool is in an open state. When the tool is started, the motor first rotates backward to return the drive unit to the home zero position. After that, the forward rotation is performed to drive out the rollers and gradually close the crimping tool, thereby crimping the workpiece.

[0024] In this embodiment, as in the Fig. 3, Fig. 5 and Fig. As shown in Figure 10, the mounting sleeve 36 is an integrated sleeve structure and includes a spindle mounting portion 362 and a reducer mounting portion 363. The spindle mounting portion 362 is used to mount the spindle 33, and the reducer mounting portion 363 is integrally arranged with the spindle mounting portion 362 to mount the reducer 52. That is, the reducer housing for mounting the reducer 52 and the mounting housing for mounting the spindle are formed into an integrated structure, which greatly simplifies the assembly structure and reduces costs, while making the structure more compact and stable, which is conducive to miniaturization and weight reduction of the product.The spindle mounting portion 362 includes a guide portion 3621 and a mounting portion 3622. The guide portion 3621 is located at one end of the mounting portion 3622 remote from the mounting portion 363, and the inner wall is opened with a plurality of guide grooves 3623 that cooperate with the movable sleeve. The interior of the mounting portion 3622 is provided with a mounting step 3624 for mounting the mounting plate 33. An annular mounting plate 332 is integrated at one end of the spindle 33 near the reduction gear 52 (as shown in FIG. Fig. As shown in Figure 4, the annular mounting plate 332 is arranged integrally with the mounting plate 33 and adopts an integrated structure that is simple and stable. A flat bearing 53 (also called a flat needle roller bearing) is arranged between the annular mounting plate 332 and the mounting step 3624, and a deep groove ball bearing 54 is arranged on the side of the mounting step 3624 opposite the flat bearing 53. One end of the spindle 33 passes through the deep groove ball bearing 54 (also called a ball bearing) and connects to the reduction gear 52. The selection of the flat bearing 53 can not only cooperate with the deep groove ball bearing 54 to form a stable fastening between the spindle 33 and the mounting portion 3622, but can also counteract the recoil force in the axial direction of the spindle 33, thereby stabilizing the load on the spindle 33 and providing protection for the spindle 33.

[0025] On the outer wall of the mounting area 3622, the above-mentioned mounting notch 361 is opened for mounting the sensor 62. In this embodiment, the mounting notch is similar to a raceway, and the sensor 62 is embedded. The sensor 62 is mounted here, on the one hand, closer to the control plate 41, and on the other hand, because the mounting sleeve 36 is built into the housing 11 and held relatively firmly with respect to the housing 11. Even if the working angle of the crimping head needs to be adjusted during use, this has no influence on the sensor 62, thus ensuring the proper function of the sensor 62.

[0026] The movable sleeve includes a push rod 34 and a spindle nut 35, which are arranged either in a one-piece construction or in a separable combination. In this embodiment, the partially assembled version is taken as an example: In the center of the spindle nut 35, there is a through hole 351 through which the spindle 33 passes. The outer peripheral surface is installed near the bottom with a sensor component 61, and the spindle nut 35 is arranged at one end of the push rod 34. The push rod 34 has a structure in which one end is closed and the other end is open. The closed end is formed with a connecting head 341. As shown in Fig. 6, the connecting head 341 extends beyond the mounting sleeve 36 and is fixed to the roller seat 32 by a screw 321, thereby realizing the connection of the push rod 34 to the roller seat 32; The push rod 34 is hollow inside, and the open end is sheathed outside the end of the spindle 33 facing away from the reduction gear 52.

[0027] As in Fig. As shown in Figure 8, the open end of the push rod 34 protrudes into the through hole 351 of the spindle nut 35 to form a male end 342. The male end 342 is an annular protrusion structure through which the push rod 34 is connected to the spindle nut 35. The spindle nut 35 is disposed at the end of the push rod 34 (that is, the spindle nut 35 is located at the end of the push rod 34 remote from the roller seat 32). The push rod 34 can move the roller seat 32 during the rotation of the spindle 33, whereby rollers 31 press the crimping tool 21 to work. During the movement, rollers 31 come into contact with the inner end of the chuck 211, and the chuck 211 rotates around the central rotation axis as an axis under the pressure of the rollers 31, thereby closing the crimping tool 21 to crimp the workpiece.Since the structure and principle by which the roller drives the crimping tool are state of the art, they will not be discussed further here. The mounting sleeve 36 is arranged on the outside of the spindle 33, the push rod 34, and the spindle nut 35, and its end is connected to the mounting seat 22. One end of the mounting sleeve 36 is connected to the mounting segment 221 of the mounting seat 22 by a thread located near the roller seat 32. The interior of the mounting sleeve 36 has a hollow structure that encloses the spindle 33 and the spindle nut 35 within the guide sleeve 36. A gap is formed between the inner wall of the mounting sleeve 36 and the outer wall of the spindle 33, allowing movement of the push rod 34 and the spindle nut 35.

[0028] This creates a relatively enclosed space between the push rod 34, the spindle nut 35, and the mounting sleeve 36. The spindle 33 is located within this enclosed space. It provides an additional protective barrier for the spindle 33 to prevent dust and contaminants from entering and affecting the spindle's precision.

[0029] As in the Fig. 7 to 9, one end of the through hole 351 of the spindle nut 35 near the push rod 34 is provided with a mounting groove 352. The bottom of the mounting groove 352 forms an annular active surface 353. The active surface 353 abuts the lower end surface of the insertion end 342 of the push rod 34. The two interact so that the spindle nut 35 can push the push rod 34 towards the rolling seat 32 under the action of the spindle 33. As shown in Fig. As shown in Fig. 8, the specific assembly structure of the spindle nut 35 and the push rod 34 is as follows: The inner wall of the through hole 351 on the side of the effective surface 353 is recessed along the circumference to form a locking groove 357. A limit lock 37 is installed in this locking groove 357. The limit lock connects the spindle nut 35 to the push rod 34, so that the insertion end 342 is positioned between the limit lock 37 and the effective surface 353.

[0030] The movement direction of the push rod 34 has two directions: one direction is the direction in which the roller seat 32 is moved toward the crimping tool 21, called the forward direction; the other direction is the opposite direction to the forward direction, called the reverse direction. As shown in Fig. As shown in Figure 8, the movement of the push rod 34 in the feed direction relies on the action surface 353 of the screw nut 35 acting on the lower end surface of the insertion end 342 of the push rod 34 to realize feed. It has the characteristics of large bearing capacity and practical for load-bearing capacity, which facilitates bearing the larger feed force during work. The movement of the push rod 34 toward the retraction direction depends on the end structure of the screw nut 35 and the limit bar 37 acting on the insertion end 342 to achieve retraction. At this time, the force is relatively small and it is not easy to affect the service life of the limit bar 37.

[0031] As in the Fig. 3 and Fig. As shown in Fig. 9, the inner wall of the through hole 351 is provided with a threaded fitting portion (i.e., a spiral groove 354) that cooperates with the threaded portion 331 on the surface of the spindle 33. Balls 39 (steel balls) are installed between the threaded fitting portion and the threaded portion 331. Furthermore, a mounting hole 355 is provided on the spindle nut 35 for installing a reverse reversing mechanism 356, which, together with the spindle 33, forms an inner circuit ball screw structure. The outer surface of the spindle nut 35 is further provided with a slide lock 358 (this may also be a gear structure).The guide groove 3623 on the inner wall of the guide portion 3621 (this may also be a groove structure that matches with the gears) can cooperate with the slide lock 358, so that the spindle nut 35 can perform a stable axial movement along the inner wall of the guide portion 3621 of the mounting sleeve 36, thereby ensuring good guidance and stability.

[0032] As in Fig. 3, one end of the spindle 33 located inside the push rod 34 is further equipped with a bearing 38. The bearing 38 is fixed to the spindle 33 by a spring clip 381. The bearing 38 is located between the upper end of the spindle 33 and the inner wall of the push rod 34. This not only allows the spindle 33 to rotate more stably, but also limits the stroke of the spindle nut 35 and prevents the spindle nut 35 from deviating from the spindle 33, thereby making the structure more stable.

[0033] As in the Fig. 3 and Fig. As shown in Figure 10, the control motor 51 in this embodiment is a sensorless brushless motor. Compared with conventional motors with sensors (with Hall elements), the sensorless brushless motor reduces the wiring layout and the number of components. In high-power power tools, since high temperatures can affect the electrical components, the use of a sensorless brushless motor ensures a longer service life. The sensorless brushless motor includes an output shaft 511 on which a motor gear 513 is mounted, and the reduction gear 52 is mounted on the motor gear 513. Specifically, the reduction gear 52 is a three-stage planetary structure mounted in the reduction gear mounting portion 363 of the mounting sleeve 36.The three-stage planetary structure includes a first internal gear 521, second and third internal gears 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 internal gear 521 and the second and third internal gears 522 are stacked on top of each other and fixedly installed on the inside of the reduction gear mounting portion 363. The first planetary gear 524 is mounted on the first planetary carrier 523, and the first planetary gear 524 meshes with the motor gear 513. The second planetary gear 526 is mounted on the second planetary carrier 525 and meshes with the first planetary carrier 523. The third planetary gear 528 is mounted on the third planetary carrier 527 and meshes with the second planetary carrier 525.In the center of the third planetary carrier 527 is a connection hole through which the lower end of the spindle 33 is inserted. The lower end of the spindle 33 is secured with a spring clip in the center part of the third planetary carrier 527. The aforementioned deep groove ball bearing 54 is located between the upper end of the third planetary carrier 527 and the mounting step 3624. How this embodiment works:

[0034] Pressing button 71 starts the tool. The motor initially rotates backward, driving spindle 33 to rotate backward, causing push rod 34 to return the drive unit to the initial zero position. Sensor 62 detects that sensor component 61 has reached the initial zero position and transmits the signal to control plate 41. Control plate 41 then controls the motor forward, causing spindle 33 to rotate forward, causing push rod 34 to move the drive unit toward crimping tool 21. Rollers 31 contact and rotate the clamping jaw 211 of crimping tool 21 to crimp the connection of the workpiece. < Example 2 >

[0035] This embodiment is essentially identical to Embodiment 1 above, except for the connection structure of the insertion end 342 of the push rod 34 with the spindle nut 35. The spindle nut 35 has, as in Embodiment 1, a through hole 351 in the center through which the spindle 33 is passed. At the end of the through hole 351 closest to the push rod 34, a mounting groove is provided, the bottom of which forms an annular engagement surface 353. This engagement surface 353 is in contact with the end surface of the engagement end of the push rod 34. Through this interaction, the spindle nut 35, under the action of the spindle 33, can move the push rod 34 toward the roller seat 32. As in Fig. As shown in Fig. 11, the specific assembly structure of the spindle nut 35 and the push rod 34 in this embodiment is that a latch 359 is attached to the side of the through hole 351 opposite to the action surface 353. One end of the latch 359 is inserted into the insertion end 342 of the push rod 34. Through this latch 359, the spindle nut 35 is connected to the push rod 34. The movement direction of the push rod 34 has two directions: one direction is the direction in which the roller seat 32 is moved toward the crimping tool 21, called the forward direction; the other direction is the opposite direction to the forward direction, called the reverse direction. The movement of the push rod 34 in the forward direction is enabled by the action of the action surface 353 of the spindle nut 35 on the end surface of the insertion end 342 of the push rod 34.The movement of the push rod 34 in the reverse direction is achieved by the latch 359 on the spindle nut 35 at the insertion end 342 of the push rod 34 for retraction. < Example 3 >

[0036] This embodiment is essentially identical to the above embodiments 1 and 2, the difference being that the shape of the mounting notch 361 for mounting the sensor 62 is opened in the center of the mounting sleeve 36. In the embodiment 1, as in Fig. 5, the shape of the mounting notch 361 has a track-like shape with semicircular ends. In this embodiment, as shown in Fig. As shown in Figure 12, the shape of the mounting notch 361 is semicircular at one end and straight at the other. The different design of the two ends enables error-free installation. < Example 4 >

[0037] This embodiment is substantially identical to the above embodiments 1-3, with the difference that in the above embodiments 1-3, the spindle 33 is arranged integrally with the annular mounting plate 332 thereon, while in this embodiment, as in Fig. 13, the outer periphery of the spindle 33 is provided with the annular mounting plate 332 above the mounting step 3624 of the mounting sleeve 36. This annular mounting plate 332 has a "convex" cross-section and a larger outer diameter at its large end 332a and a smaller outer diameter at its small end 332b, with a flat bearing 53 disposed between the outer periphery of the small end 332b and the inner wall of the mounting sleeve 36. The use of a separate structure facilitates disassembly and replacement. Effect and effect of the embodiment:

[0038] According to the power tool and the main body of the above-described embodiments, since the sensor 62 is mounted on the mounting sleeve 36 and the corresponding sensor component 61 is mounted on the movable sleeve, it is ensured that the sensors 62 are not affected during use of the tool when the mounting seat 22 (the structure for mounting the working component) is rotated to adjust the orientation of the working component. Regardless of how the mounting seat 22 rotates, the sensor 62 attached to the mounting sleeve 36 is not affected (i.e., the wire connection of the sensor 62 to the control board is not twisted or broken by the rotation), thereby protecting the sensor 62 and ensuring its proper use.

[0039] Furthermore, the mounting sleeve 36 is designed in a one-piece construction for securing the spindle 33 and the reduction gear 52, eliminating the need for a separate housing for the reduction gear 52. This simplifies the structure, reduces costs, and ensures that the entire spindle 33 rotates more stably.

[0040] Furthermore, the spindle 33 is housed in the housing 11, and the push rod 34 and the spindle nut 35 are arranged on the outside of the spindle 33. This creates a relatively closed space on the circumferential side inside the guide sleeve, which prevents the ingress of dust and protects the spindle 33.

[0041] Furthermore, the push rod 34 requires a lower hardness than the spindle nut 35 in practice. Therefore, in the above embodiments, the push rod 34 was arranged separately from the spindle nut 35, and both parts were selected from materials of different hardness. This contributes to a certain extent to cost reduction and meeting requirements.

[0042] Furthermore, the use of a sensorless brushless motor 51 offers advantages over conventional motors with sensors (with Hall elements), such as a simplified wiring layout and fewer components. In high-performance power tools, since high temperatures can affect electrical components, the use of a sensorless brushless motor ensures a longer service life.

[0043] The above embodiments are only for illustrating the specific implementation of the utility model, and the utility model is not limited to the scope of the above embodiments. For example, in the situation provided by the above embodiment, the push rod and the movable sleeve are arranged separately, and in the actual situation, the push rod and the movable sleeve may also be arranged integrally. In the situation provided by the above embodiment, the working part is a crimping pliers as an example, and in the actual situation, it may also be replaced with a working part such as a shaving head, that is, the working part is replaced according to different working environments and requirements.For example, in the above-mentioned embodiments, the push rod is arranged separately from the movable sleeve; however, in practice, the push rod may also be mounted integrally with the movable sleeve. In the above-mentioned embodiments, a crimping tool is used as the working component; however, in practice, a cutting head or other working component may also be used, which can be replaced depending on the different working environments and requirements. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 116810725A

[0003]

Claims

[1] A main body of the power tool which is installed in a power tool and serves to drive the working component of the power tool, having and comprising the following features: Housing; Mounting sleeve mounted in the housing and fixed relative to the housing; Drive unit acting on the working component; Thrust unit used to move the drive unit, and sensor unit; The thrust unit includes: Spindle which is arranged to rotate in the mounting sleeve; The movable sleeve, the movable sleeve is arranged on the outside of the spindle and connected to the drive unit; The sensor unit includes: Sensor component mounted at the end of the movable sleeve, away from the drive unit, Sensor that is mounted on the mounting sleeve and works together with the sensor component. [2] Main body of the power tool according to claim 1, characterized by that it also includes: drive motor, Reduction gear, one end of which is mounted on the output shaft of the drive motor and the other end is combined with the spindle, The mounting sleeve includes: A spindle mounting area provided for mounting the spindle; A reduction gear mounting area that is integrally formed with the spindle mounting area and is used for mounting the reduction gear. [3] Main body of the power tool according to claim 2, characterized by that the spindle mounting area includes: A guide area, the inner wall of which is provided with a guide groove that fits with the movable sleeve, A mounting area in which a mounting step is provided to install the spindle, and a sensor is attached to the outside of the mounting area. [4] Main body of the power tool according to claim 3, characterized by : At the end of the spindle closer to the reduction gear, an annular mounting plate is provided in either a one-piece or two-piece design. A flat bearing is located between the annular mounting plate and the mounting stage, and a deep groove ball bearing is mounted on the side of the mounting stage facing away from the flat bearing. One end of the spindle passes through the deep groove ball bearing and connects to the reduction gear. [5] Main body of the power tool according to one of claims 1 to 4, characterized by that the drive unit includes: A pair of rollers to act on the working component, A roller seat for mounting a pair of rollers, The movable sleeve includes: Push rod, one end of which engages the mounting sleeve and wraps around the outer side of the spindle, while the other end protrudes from the mounting sleeve and is connected to the roller seat, Spindle nut mounted on the outer portion of the spindle and the movable sleeve is provided on the side of the spindle away from the roller seat, either as a one-piece or two-piece construction. A sensor component is mounted on the outside of the spindle nut. [6] Main body of the power tool according to claim 5, characterized by When the spindle nut and the push rod are arranged separately, the center of the spindle nut is provided with a through hole through which the spindle passes. The end of the push rod remote from the roller seat forms a spigot end that engages the through hole; The through hole contains an active surface that comes into contact with the end face of the insertion end. On the inside of the through hole, on the side of the active surface, a recess is machined along the circumference to form a locking groove into which a limiting bolt is inserted. The insertion end is located between the limiting bolt and the active surface. Alternatively, a locking hole may be provided on the side of the effective surface of the through hole, into which a locking pin is inserted, which connects the movable sleeve to the insertion end. [7] Main body of the power tool according to one of claims 2 to 4, characterized by : A motor seat is provided at the end of the drive motor closest to the reducer. This motor seat is attached to the end face of the reducer mounting area by a fastener. [8] Main body of the power tool according to one of claims 2 to 4, characterized by that it includes: Control switch mounted on the housing; Controller installed in the enclosure; Power source removably mounted on the housing; and Mounting seat which can be rotatably mounted on the mounting sleeve and one end of which extends from the housing to install the working component; Sensors, control switches, drive motor and power supply are all electrically connected to the controller. [9] Main body of the power tool according to claim 8, characterized by : A display is provided on the housing, near the controller. [10] A power tool, characterized by that it includes: main body, Working component that is detachably mounted on the main body and operates under the drive of the main body, wherein the main body is a main body of the power tool as described in any one of claims 1-9.

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