Electric crimping tool

Abstract

The present application belongs to the technical field of electric tools, and particularly relates to an electric crimping tool. The electric crimping tool comprises a shell, a working mechanism with a crimping head, a driving mechanism for driving the crimping head to work, and a control mechanism for controlling the driving mechanism to work, and the control mechanism is provided with a power supply and a control board. The driving mechanism comprises a roller assembly, a push rod assembly, a screw rod, a push rod and a guide sleeve. The roller assembly comprises a roller and a roller seat for the roller. The push rod assembly is used for driving the roller seat to move and comprises the screw rod, the push rod and the guide sleeve. The screw rod is rotatably arranged in the shell. The push rod is movably arranged outside the end portion of the screw rod and is fixed to the roller seat at the end portion. The guide sleeve is sleeved on the outer periphery of the screw rod and the push rod. The push rod can drive the roller seat to move during the rotation of the screw rod. Since the guide sleeve is sleeved on the outer periphery of the screw rod, 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 and protect the screw rod.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric tools, and particularly relates to an electric crimping tool. BACKGROUND

[0002] An electric tool is a tool that is powered by an electric power source and drives a working head to work through a transmission mechanism. In pipe and power operations, different working heads can be equipped to achieve different functions, such as an electric crimping tool, an electric pipe expanding tool, an electric shearing tool, etc. Taking the electric crimping tool as an example, it is generally composed of a power source, a motor driving mechanism and a crimping head. The power source supplies power to the motor driving mechanism and controls the motor driving mechanism to start to drive the crimping head to perform crimping work on the pipe.

[0003] The existing electric crimping tool, such as the extrusion tool disclosed in the prior invention patent CN104540644B, drives the working head through a screw rod structure as a driving mechanism. However, due to the design that the screw rod is exposed outside, impurities such as mud and dust are easy to enter and adhere to the screw rod surface thread groove during use, which causes the screw rod to wear and produce abnormal noise, and even get stuck during work, seriously affecting the transmission precision and service life between the screw rod and the screw rod nut. SUMMARY

[0004] To solve the above problems, the present application provides an electric crimping tool in which the screw rod is installed inside the shell to prevent dust from entering.

[0005] The present application adopts the following technical solutions:

[0006] An electric crimping tool for crimping workpieces has the following features: a shell; a working mechanism with a crimping head; a driving mechanism for driving the crimping head to work; and a control mechanism for controlling the driving mechanism to work, and having a power source and a control board; wherein the driving mechanism has: a roller assembly containing a roller acting on the crimping head and a roller seat mounting the roller; a push rod assembly for moving the roller seat, and containing: a screw rod rotatably arranged in the shell; a push rod movably arranged outside the end of the screw rod, and having an end fixed to the roller seat; and a guide sleeve sleeved on the outer periphery of the screw rod and the push rod; the push rod can move the roller seat during rotation of the screw rod.

[0007] In the electric crimping tool proposed in the present application, the end of the push rod away from the roller seat is provided with a movable sleeve, and the movable sleeve has a through hole in the middle for the screw rod to pass through; the end of the through hole close to the push rod is provided with an acting surface matched with the end surface of the push rod.

[0008] In the electric crimping tool, the through hole is provided with a clamping groove on one side of the action surface, a clamping ring is installed in the clamping groove, and the movable sleeve is connected with the push rod through the clamping ring.

[0009] In the electric crimping tool, an end of the push rod away from the roller seat is integrally formed with a movable sleeve, and a through hole for the lead screw to pass through is arranged in the middle of the movable sleeve.

[0010] In the electric crimping tool, the push rod assembly further comprises a guide sleeve sleeved on the outer periphery of the lead screw, a gap for the push rod and the movable sleeve to move is formed between the inner wall of the guide sleeve and the outer wall of the lead screw, the inner wall of the guide sleeve is provided with a plurality of sliding grooves, and the outer periphery of the movable sleeve is provided with a plurality of sliding strips matched with the sliding grooves; a threaded segment is arranged on the surface of the lead screw, a threaded matching part is arranged on the inner wall of the through hole, and a plurality of balls are arranged between the threaded segment and the threaded matching part; a mounting hole is arranged on the movable sleeve, and a reverser is mounted in the mounting hole.

[0011] In the electric crimping tool, the drive mechanism further comprises a drive assembly for driving the lead screw to rotate, and the drive assembly comprises a power source for providing power, an output shaft, and a reducer mounted on the output shaft and comprising a housing and a planet carrier mounted in the housing and having one end connected with the output shaft and the other end used for mounting the lead screw, wherein an installation groove is arranged on one end of the housing towards the lead screw, and a thrust needle bearing is arranged in the installation groove.

[0012] In the electric crimping tool, the power source is a non-inductive brushless motor.

[0013] In the electric crimping tool, one end of the lead screw inside the push rod is provided with a guide piece through a fixing piece.

[0014] In the electric crimping tool, the drive mechanism further comprises an induction assembly, and the induction assembly comprises an induction magnet mounted on the roller seat and a sensor for sensing the position of the induction magnet and transmitting a signal to control the power source to work, wherein the induction magnet has an initial zero position, the power source is reversed first when it is turned on, and the power source is positively driven to move the push rod towards the roller seat when the sensor senses that the induction magnet is located at the initial zero position.

[0015] In the electric crimping tool, the working mechanism further has a mounting seat, one end of which is located in the shell and is provided with the roller seat, and the other end extends out of the shell and is provided with the crimping head, and the mounting seat is further provided with a mounting section for mounting the driving mechanism at the end located in the shell, and the sensor is mounted on the mounting seat.

[0016] Invention function and effect

[0017] According to the electric crimping tool, since the lead screw is arranged in the shell, and the push rod and the guide sleeve are sleeved on the outer periphery of the lead screw, a relatively closed space is formed on the peripheral surface inside the guide sleeve, dust is prevented from entering and affecting the lead screw, and the lead screw is protected. BRIEF DESCRIPTION OF DRAWINGS

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

[0019] Figure 2 is a structural diagram of the electric crimping tool of embodiment 1 of the present application after removing part of the shell.

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

[0021] Figure 4 is a structural diagram of the movable sleeve of embodiment 1 of the present application.

[0022] Figure 5 is a sectional view of the movable sleeve of embodiment 1 of the present application.

[0023] Figure 6 is a partial enlarged view of A of Figure 3

[0024] Figure 7 is a partial enlarged view of B of Figure 3

[0025] Figure 8 is a partial enlarged view of C of Figure 3

[0026] Figure 9 is a schematic diagram of the roller seat installation structure of embodiment 1 of the present application.

[0027] Figure 10 is a sectional schematic diagram of the push rod and the movable sleeve installation structure of embodiment 2 of the present application.

[0028] ​​​: electric crimping tool 100, housing 10, working mechanism 20, crimping head 21, clamping jaw 211, notch 212, mounting seat 22, mounting section 221, mounting notch 222, driving mechanism 30, roller 31, roller seat 32, screw 321, screw rod 33, threaded section 331, push rod 34, connecting head 341, boss structure 342, movable sleeve 35, through hole 351, mounting groove 352, acting surface 353, helical groove 354, mounting hole 355, reverser 356, clamping groove 357, sliding bar 358, latch 359, guide sleeve 36, sliding groove 361, clamping ring 37, guide 38, clamping spring 381, power supply 40, control board 41, non-inductive brushless motor 51, output shaft 511, speed reducer 52, housing 521, planet carrier 522, planet wheel 523, mounting groove 524, annular mounting position 525, thrust needle roller bearing 53, needle roller 531, upper mounting bracket 532a, lower mounting bracket 532b, ball bearing 54, bearing washer 55, inductive magnet 61, sensor 62, screw 621. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the electric crimping tool of the present application is specifically described below in combination with embodiments and drawings.

[0030] <Embodiment 1>

[0031] Figure 1 is a structural diagram of the electric crimping tool of Embodiment 1 of the present application.

[0032] Figure 2 is a structural diagram of the electric crimping tool of Embodiment 1 of the present application after removing part of the housing.

[0033] As Figure 1 and Figure 2As shown in the figure, the electric crimping tool 100 at least includes a housing 10, a working mechanism 20 acting on and crimping a workpiece (for example, a pipe), a driving mechanism 30 for driving the working mechanism 20 to work, a control mechanism for controlling the driving mechanism 30 to work, and a switch mechanism, the control mechanism has a power supply 40 for power supply and a control board 41 and the like structure, the switch mechanism has a button 71 arranged on the housing 10 and a switch element 72, the switch element 72 is electrically connected with the control board 41. Among them, the power supply 40 is detachably installed at the bottom of the housing 10, the control board 41 and the driving mechanism 30 are installed inside the housing 10, and the working mechanism 20 is located at the front end of the housing 10. The working mechanism 20 has a working head (also can be called a crimping head 21) and a mounting seat 22, the crimping head 21 has a pair of symmetrically arranged clamping jaws 211, the front end of the clamping jaw 211 forms a notch 212 for clamping the workpiece, and the pair of clamping jaws 211 can rotate under the drive of the driving mechanism 30, so as to crimp the workpiece in the notch 212; the rear end of the mounting seat 22 is located in the housing 10 and is provided with a mounting segment 221 for mounting the driving mechanism 30, and the front end extends out of the housing 10 and is detachably connected with the crimping head 21, which is convenient for dismounting and replacing the working head.

[0034] Figure 3 is the sectional view of the mounting seat and the driving mechanism mounting structure of the embodiment 1 of the application.

[0035] Figure 4 is the schematic view of the roller seat mounting structure of the embodiment 1 of the application.

[0036] Figure 5 is the structure diagram of the movable sleeve of the embodiment 1 of the application.

[0037] Figure 6 is the sectional view of the movable sleeve of the embodiment 1 of the application.

[0038] Figure 7 is Figure 3 the enlarged view of A in the figure.

[0039] As Figure 3 shown, the driving mechanism 30 includes a roller assembly, a push rod assembly for driving the roller assembly to move, a driving assembly for driving the push rod assembly, and an induction assembly. Among them, the roller assembly has a pair of rollers 31 acting on the crimping head 21 and a roller seat 32 mounting the rollers 31. The push rod assembly has a screw rod 33, a push rod 34, a movable sleeve 35 (also can be called a screw rod nut) and a guide sleeve 36. One end of the screw rod 33 is connected with the driving assembly and rotates under the drive of the driving assembly, the outer periphery of the screw rod 33 is formed with a threaded segment 331, the movable sleeve 35 is sleeved on the threaded segment 331, and in the rotating process of the screw rod 33, under the action of the threaded segment 331, the movable sleeve 35 moves along the screw rod 33.

[0040] The movable sleeve 35 is arranged at one end of the push rod 34, and the two can be arranged integrally or separately. In this embodiment, the separate arrangement is taken as an example for detailed description. The push rod 34 is in a structure with one end sealed and the other end open. The sealed end is formed with a connecting head 341. As shown in the figure, the connecting head 341 is fixed with the roller seat 32 through a 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 arranged outside the end of the lead screw 33 away from the driving assembly. As shown in the figure, the open end is formed with a boss structure 342. The push rod 34 is connected with the movable sleeve 35 through the boss structure 342. The movable sleeve 35 is arranged at the end of the push rod 34 (i.e. the movable sleeve 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 in the process of rotation of the lead screw 33, so as to make the roller 31 push the crimping head 21 to work. The roller 31 will contact the inner end of the clamping jaw 211 in the moving process. The clamping jaw 211 will rotate around the center rotating shaft under the pushing force of the roller 31, so as to make the crimping head 21 fold, and the workpiece is crimped. Since the structure and principle of the roller driving the crimping head to work are prior art, they will not be described in detail here. Figure 4 Figure 7 The roller 31 will contact the inner end of the clamping jaw 211 in the moving process. The clamping jaw 211 will rotate around the center rotating shaft under the pushing force of the roller 31, so as to make the crimping head 21 fold, and the workpiece is crimped. Since the structure and principle of the roller driving the crimping head to work are prior art, they will not be described in detail here.

[0041] As shown in the figures, a through hole 351 is arranged in the middle of the movable sleeve 35 for the lead screw 33 to pass through. The through hole 351 is provided with a mounting groove 352 at the end close to the push rod 34. The bottom of the mounting groove 352 is formed with an annular action surface 353. The action surface 353 abuts against the end face of the open end of the push rod 34, and the two interact with each other, so that the movable sleeve 35 can push the push rod 34 to move towards the roller seat 32 under the action of the lead screw 33. Figure 5 Figure 6 Figure 7 ​​​As shown, the specific mounting structure of the movable sleeve 35 and the push rod 34 is that the through hole 351 is provided with a clamping groove 357 on one side of the acting surface 353, and the clamping sleeve 37 is installed in the clamping groove 357, and the movable sleeve 35 is connected with the push rod 34 through the clamping sleeve 37. The moving direction of the push rod 34 has two directions, one is the direction of moving the roller seat 32 towards the crimping head 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 7 As shown, the movement of the push rod 34 towards the advancing direction is realized by the acting surface 353 of the movable sleeve 35 acting on the end surface of the open end of the push rod 34, which has the characteristics of large bearing capacity and is convenient for bearing larger advancing force during work; the movement of the push rod 34 towards the retreating direction is realized by the end structure of the movable sleeve 35 and the clamping sleeve 37 acting on the boss structure 342, at this time, the stress is relatively small, and it is not easy to affect the service life of the clamping sleeve 37.

[0042] As shown in Figure 3 and Figure 6 As shown, the inner wall of the through hole 351 is provided with a threaded matching part (i.e. a spiral groove 354) matched with the threaded segment 331 of the screw rod 33, the threaded matching part and the threaded segment 331 are provided with a ball therebetween, and a mounting hole 355 is formed on the movable sleeve 35 for mounting the reverser 356, and the screw rod 33 forms an inner circulating ball screw structure. The outer periphery of the movable sleeve 35 is also provided with a sliding strip 358 (which can also be a spline tooth structure), and the inner wall of the guide sleeve 36 is provided with a sliding groove 361 (which can also be a spline groove structure matched with the spline tooth) matched with the sliding strip 358, so that the movable sleeve 35 can move stably in the axial direction along the inner wall of the guide sleeve 36, and has a good guiding and stabilizing effect. As shown in Figure 3 As shown, the end of the screw rod 33 located inside the push rod 34 is also sleeved with a guide piece 38, the guide piece 38 is fixed on the screw rod 33 through a snap spring 381, and the guide piece 38 is located between the top end of the screw rod 33 and the inner wall of the push rod 34, which not only makes the position of the screw rod 33 more stable, but also makes the movement of the push rod 34 more stable in combination with the guide sleeve 36, and can also limit the stroke of the movable sleeve 35, avoid the movable sleeve 35 from being separated from the screw rod 33, and make the structure more stable.

[0043] Figure 8 is Figure 3 a local enlarged view of B.

[0044] As shown in Figure 3 and Figure 8As shown, the drive assembly has a power source (in this embodiment, a sensorless brushless motor 51) and a reducer 52 for providing power. Compared with traditional sensored motors (with Hall elements), the sensorless brushless motor 51 reduces the wiring layout and components. In high-power power tools, since heat can easily affect electrical components, the sensorless brushless motor has a longer lifespan. The sensorless brushless motor 51 includes an output shaft 511, and the reducer 52 is mounted on the output shaft 511. The end of the lead screw 33 away from the push rod 34 is mounted on the output end of the reducer 52. The specific mounting structure of the lead screw 33 and the reducer 52 is as follows: the reducer 52 includes a housing 521 and a three-stage planetary structure. The outer periphery of the end of the housing 521 facing the rolling seat 32 is threaded to one end of the guide sleeve 36. The three-stage planetary structure is mounted inside the housing 521, including a planet carrier 522 and planetary gears 523. One end of the planet carrier 522 is connected to the output shaft 511, and the other end is used to mount the lead screw 33. The housing 521 has a mounting groove 524 at one end facing the lead screw 33. A thrust needle roller bearing 53 is installed in the mounting groove 524. The inner wall of the housing 521 is also provided with an annular mounting position 525 on one side of the mounting groove 524. The annular mounting position 525 is provided with a ball bearing 54, so that the housing 521 remains stationary and unaffected when the lead screw 33 rotates. Both the thrust needle roller bearing 53 and the ball bearing 54 have through holes in the middle for the lead screw 33 to pass through.

[0045] The needle roller bearing 53 is mounted between the housing 521 and the lead screw 33 via bearing washers 55. The needle roller bearing 53 has several circumferentially arranged needles 531. Planar upper mounting brackets 532a and lower mounting brackets 532b are respectively provided above and below the needles 531. The axis of the needles 531 is perpendicular to the axis of the lead screw 33. The planes containing the end faces of the upper mounting bracket 532a and the lower mounting bracket 532b are also perpendicular to the lead screw axis. Figure 8 As shown, the outer side of the lower mounting bracket 532b is in contact with the end face of the mounting groove 524, and the outer side of the upper mounting bracket 532a is in contact with the end face of the bearing washer 55. The lead screw 33 has a protruding edge 332 that is engaged with the bearing washer 55. A flat needle roller bearing 53 is selected here, which not only cooperates with the ball bearing 54 to form a stable installation between the lead screw 33 and the housing 521, but also counteracts the recoil force in the axial direction of the lead screw 33, making the force on the lead screw 33 more stable and protecting the lead screw 33.

[0046] Figure 9 yes Figure 3 A magnified view of a portion of point C.

[0047] like Figure 3 As shown, a sensing component is disposed between the roller base 32 and the mounting base 22. Figure 9As shown, the induction assembly has an induction magnet 61 and a sensor 62, the induction magnet 61 is installed on the roller seat 32, the sensor 62 is selected from a Hall induction piece, which is used to induce the position of the induction magnet and transmit a signal to the control panel 41, and the power source is controlled by the control panel 41 to work. Figure 7 As shown, the mounting seat 22 is provided with a mounting notch 222 on one side, and the sensor 62 is fixed in the mounting notch 222 through a screw 621. Figure 2 As shown, part of the sensor 62 is exposed outside the entire machine body, which is convenient for disassembly and replacement. The induction magnet 61 has an initial zero position, and when the induction magnet 61 is located at the initial zero position, the crimping head is in an open state. When the tool is started, the motor reverses first to make the roller assembly return to the initial zero position, and then controls the roller to extend to make the crimping head gradually close to realize crimping of the workpiece.

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

[0049] Press the button 71 to start the tool, the motor reverses first to drive the screw rod 33 to reverse, which promotes the push rod 34 to drive the roller assembly to retreat to the initial zero position. After the sensor 62 senses that the induction magnet 61 returns to the initial zero position, a signal is transmitted to the control panel 41, and the control panel 41 controls the motor to rotate forward, and the screw rod rotates forward to promote the push rod 34 to drive the roller assembly to move towards the direction where the crimping head 21 is located. The roller 31 contacts and drives the clamping jaw 211 of the crimping head 21 to rotate to crimp the workpiece.

[0050] <Embodiment 2>

[0051] Figure 10 It is a sectional view of the mounting structure of the push rod and the movable sleeve of the embodiment 2.

[0052] The embodiment is basically the same as the above-mentioned embodiment 1, and the difference lies in the connection structure of the open end of the push rod 33 and the movable sleeve 35. The movable sleeve 35 has a through hole 351 for the screw rod 33 to pass through in the middle part, and an installation recess is arranged at one end of the through hole 351 close to the push rod 34. The bottom of the installation recess forms an annular acting surface 353, which abuts against the end face of the open end of the push rod 34, and the two interact with each other, so that the movable sleeve 35 can move towards the direction of the roller seat 32 under the action of the screw rod 33 and push the push rod 34. The open end of the push rod 34 is also provided with a boss structure 342 protruding outward, which is used to connect with the movable sleeve 35. Figure 10As shown, the specific mounting structure of the movable sleeve 35 and the push rod 34 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 boss structure 342 of the open end of the push rod 34, and the movable sleeve 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 seat 32 towards the crimping head 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 movable sleeve 35 acting on the end surface of the open end 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 movable sleeve 35 acting on the boss structure 342 to retreat.

[0053] Effects of the embodiment:

[0054] According to the electric crimping tool, since the lead screw is arranged in the shell, and the push rod 34 and the guide sleeve are arranged on the outer periphery of the lead screw 33, a relatively closed space is formed on the peripheral surface inside the guide sleeve, dust is prevented from entering to affect the lead screw 33, and the lead screw 33 is protected.

[0055] Further, since the hardness required by the push rod 34 in actual work is smaller than that of the movable sleeve 35, the push rod 34 and the movable sleeve 35 are arranged in a split mode in the above embodiment, different hardness materials are selected for the two, and the cost and demand can be reduced to a certain extent.

[0056] Further, since the power source adopts the non-inductive brushless motor 51, compared with the traditional inductive motor (with a Hall element), the layout of the circuit and the parts are reduced, and in the high-power electric tool, since heat easily affects the electrical elements, the non-inductive brushless motor has a longer service life.

[0057] Further, since the thrust needle bearing 53 is arranged between the lead screw 33 and the reducer shell 521, and the axis of the needle 531 of the thrust needle bearing 53, the end surface of the upper mounting frame 532a and the end surface of the lower mounting frame 532b are arranged perpendicularly to the axis of the lead screw 33, not only can the lead screw 33 and the shell 521 be stably mounted in cooperation with the ball bearing 54, but also the recoil force in the axial direction of the lead screw 33 can be offset, so that the force on the lead screw 33 is more stable, and the lead screw 33 is protected.

[0058] The above embodiment is only used to illustrate the specific implementation mode 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 in a split mode, and in actual cases, the push rod and the movable sleeve can also be arranged in an integrated mode.

Claims

1. An electric crimping tool for crimping workpieces, characterized in that, include: shell; The working mechanism has a crimp connector and a mounting base for mounting the crimp connector; A drive mechanism is used to drive the crimp connector to perform operations; as well as A control mechanism is used to control the operation of the drive mechanism, and includes a power supply and a control board; The drive mechanism has the following features: A roller assembly includes a roller that acts on the crimp connector and a roller seat for mounting the roller; A push rod assembly, used to move the roller seat, includes: The lead screw is rotatably mounted inside the housing; The push rod is located in the push rod mounting hole of the mounting base and is movably disposed on the outside of the end of the lead screw, and the end is fixed to the roller seat; A movable sleeve is provided at one end of the push rod, and has a through hole in the middle for the lead screw to pass through; and The guide sleeve has one end connected to the mounting section of the mounting base and the other end connected to the drive assembly. It is sleeved on the outer periphery of the lead screw, the movable sleeve and the push rod. The movable sleeve can move axially along the inner wall of the guide sleeve. During the rotation of the lead screw, the push rod and the roller seat are moved through the movable sleeve; The guide sleeve has a hollow structure inside, and the lead screw and movable sleeve are enclosed inside the guide sleeve. A gap is formed between the inner wall of the guide sleeve and the outer wall of the lead screw to allow the push rod and movable sleeve to move, so that the push rod, movable sleeve and guide sleeve form a relatively sealed space, and the lead screw is located in the sealed space.

2. The electric crimping tool according to claim 1, characterized in that, in, The end of the push rod away from the roller seat is provided with a movable sleeve; the end of the through hole near the push rod is provided with a working surface that cooperates with the end face of the push rod.

3. The electric crimping tool according to claim 2, characterized in that, in, The through hole is provided with a slot on one side of the working surface, and a retaining ring is installed in the slot to connect the movable sleeve to the push rod. 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 push rod.

4. The electric crimping tool according to claim 1, characterized in that, in, The end of the push rod away from the roller seat has an integrally formed movable sleeve.

5. The electric crimping tool according to any one of claims 2-4, characterized in that, in, A gap is formed between the inner wall of the guide sleeve and the outer wall of the lead screw to allow the push rod and the movable sleeve to move. The inner wall of the guide sleeve is provided with several sliding grooves, and the outer periphery of the movable sleeve is provided with several sliding strips that cooperate with the sliding grooves. The lead screw has a threaded section on its surface, and a threaded mating part is provided on the inner wall of the through hole. A ball is provided between the threaded mating part and the threaded section. A mounting hole is provided on the movable sleeve, and a reverser is installed in the mounting hole.

6. The electric crimping tool according to any one of claims 1-4, characterized in that, in, The drive mechanism further includes a drive assembly for driving the lead screw to rotate, the drive assembly comprising: A power source, used to provide power, has an output shaft. A speed reducer, mounted on the output shaft, includes: case, A planetary carrier, installed inside the housing, has one end for connection to the output shaft and the other end for mounting the lead screw. The housing has a mounting groove at one end facing the lead screw, and a thrust needle roller bearing is installed in the mounting groove.

7. The electric crimping tool according to claim 6, characterized in that, in, The power source is a sensorless brushless motor.

8. The electric crimping tool according to any one of claims 2-4, characterized in that, in, The lead screw is located inside the push rod, and a guide is provided at one end of the lead screw via a fixing component.

9. The electric crimping tool according to claim 6, characterized in that, in, The drive mechanism also includes a sensing component, which comprises: An induction magnet is mounted on the roller seat. The sensor is used to sense the position of the sensing magnet and transmit signals to control the power source to operate. The sensing magnet has an initial zero position. When the power source is turned on, it first reverses until the sensor senses that the sensing magnet is at the initial zero position. Then, the power source rotates forward to drive the push rod to move toward the roller seat.

10. The electric crimping tool according to claim 9, characterized in that, in, The working mechanism also has a mounting base, one end of which is located inside the housing and has the roller seat mounted thereon, and the other end of which extends out of the housing and has the crimp connector mounted thereon. The mounting base, located inside the housing, also has a mounting section for mounting the drive mechanism at one end. The sensor is mounted on the mounting base.

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