Handheld electric tool

Abstract

The invention belongs to the technical field of electric tools, and particularly relates to a handheld electric tool, which comprises a tong head device, a handle device and a handle device, the driving device comprises a power mechanism and a driving mechanism for driving the jaw to be closed; the control device comprises a starting signal source used for controlling the power mechanism to act; the trigger device is used for manually driving the jaw to close and triggering the control device to work; the trigger device comprises a trigger shaft which is movably arranged in a strip-shaped hole in the rear end of the tong head installation component through a trigger reset piece. The trigger handle is rotationally arranged on the trigger shaft and is provided with a handle part for being pressed by fingers and a pulling and buckling part; the abutting part is arranged at the tail part of the first clamp body or / and the second clamp body and corresponds to the pulling and buckling part; the handle part of the trigger handle is pressed, and the pulling and buckling part drives the jaw to close and triggers the starting signal source through the abutting part, so that a user can operate with one hand conveniently, and the operation convenience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power tools, and particularly relates to a handheld power tool. Background Art

[0002] Chinese Patent CN220660751U discloses an electric crimping tool, which includes a housing, and a jaw head and a motor disposed in the housing from top to bottom. The upper end of the jaw head extends out of the housing. The jaw head includes two relatively arranged jaw bodies, and the middle parts of the two jaw bodies are respectively hinged in the housing. The jaw bodies are in a normally closed state under the action of a spring. When in use, it is necessary to first press the operating handle, place the workpiece into the jaw, and then press the power button to start the motor to realize the crimping action of the workpiece. It has the following problems:

[0003] 1. The operating handle and the power button of the electric crimping tool are respectively located on both sides of the tool, and generally both hands are required to cooperate to complete the operation; even when operating with one hand, the thumb needs to be placed on the power button, some fingers need to be placed on the operating handle, and the remaining fingers need to be placed on the housing to hold it. Such an operation is not very convenient and is rather laborious.

[0004] 2. The jaw is in a normally closed state, and each installation or removal of the workpiece requires the user to manually operate the operating handle to open the jaw, increasing the labor intensity of the user and affecting the processing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a handheld power tool with a simple structure, convenient and labor-saving operation.

[0006] The purpose of the present invention is achieved as follows:

[0007] A handheld power tool includes: a jaw head device, including a jaw head mounting member, a first jaw body and a second jaw body rotatably disposed on the jaw head mounting member. Both the first jaw body and the second jaw body have a jaw mouth portion for forming a jaw and a force-receiving portion for driving its own rotation. The jaw is a normally open jaw; a driving device, including a power mechanism for providing power and a driving mechanism connected to the output end of the power mechanism and acting on the force-receiving portion. The driving mechanism drives the jaw to close through the force-receiving portion; a control device, including a start signal source for controlling the operation of the power mechanism; and a trigger device for manually driving the jaw to close and triggering the control device to work. Among them, the trigger device includes: a trigger shaft movably disposed in a strip-shaped hole at the rear end of the jaw head mounting member through a trigger return member; a trigger handle rotatably disposed on the trigger shaft and having a handle portion for finger pressing and a trigger portion; and an abutting portion disposed at the tail of the first jaw body or / and the second jaw body and corresponding to the trigger portion. Pressing the handle portion of the trigger handle, the trigger portion drives the jaw to close and triggers the start signal source through the abutting portion.

[0008] The present invention is further provided with a trigger handle having an initial position, a pre-pressing position, and a switch activation position: when the trigger handle is pressed from the initial position to the pre-pressing position, the trigger handle rotates around the trigger axis, so that the jaws can pre-press the workpiece; when the trigger handle is pressed from the pre-pressing position to the switch activation position, the trigger handle rotates around the abutting portion and drives the trigger axis to move, thereby triggering the activation signal source and closing the jaws through the driving device.

[0009] The present invention is further provided with the trigger handle having two symmetric trigger portions; the abutting portions are correspondingly arranged on the side walls of the first jaw body and / or the second jaw body and correspond to the two trigger portions one by one.

[0010] The present invention is further provided with the abutting portion being a trigger pin, which is correspondingly installed in the trigger pin mounting holes at the tails of the first jaw body and / or the second jaw body, and both ends of the trigger pin respectively protrude from the side walls of the first jaw body or the second jaw body.

[0011] The present invention is further provided with the trigger return member being a U-shaped torsion spring, one end of which is sleeved on the trigger axis and the other end directly or indirectly abuts against the jaw head mounting member, driving the trigger axis to move towards the outside of the strip-shaped hole.

[0012] The present invention is further provided with the jaw head device further including a synchronous rotation mechanism arranged between the first jaw body and the second jaw body, and the synchronous rotation mechanism includes: a toothed slider slidably arranged on the jaw head mounting member, a first tooth portion arranged on the first jaw body close to the second jaw body and meshing with the toothed slider; a second tooth portion arranged on the second jaw body close to the first jaw body and meshing with the toothed slider; and a slider return member abutted between the toothed slider and the jaw head mounting member for driving the toothed slider to move to realize the automatic opening of the jaws.

[0013] The present invention is further provided with, wherein when the trigger handle is pressed, the resistance force of the slider return member acting on the trigger handle through the jaw head device is the first acting force; the resistance force of the trigger return member acting on the trigger handle through the trigger axis is the second acting force; and the second acting force is greater than the first acting force.

[0014] The present invention is further provided with the first jaw body and the second jaw body both including a jaw arm plate A, a toothed rocker arm, and a jaw arm plate B that are fixedly connected to each other; the toothed rocker arm has a plurality of teeth for forming the first tooth portion or the second tooth portion and a longitudinal extension surface for forming a force-receiving portion; tooth-shaped groove portions corresponding to the first tooth portion and the second tooth portion are respectively arranged on both sides of the toothed slider, and the rotation of one of the toothed rocker arms can drive the linear movement of the toothed slider and realize the synchronous rotation of the other toothed rocker arm.

[0015] The present invention is further provided with a jaw mounting member having jaw mounting plates respectively disposed on both sides of the first jaw body and the second jaw body. At least one jaw mounting plate is provided with a strip-shaped sliding groove, and at least one side of the toothed slider is provided with a slider protrusion. The toothed slider linearly moves in the strip-shaped sliding groove through the slider protrusion.

[0016] The present invention is further provided with a power mechanism having a motor, a reducer, and a screw. The motor is fixed to the jaw mounting member through the reducer. The input end of the screw is connected to the reducer, and the other end of the screw is rotatably disposed on the jaw mounting member through a screw support block. The driving mechanism has a roller seat slidably disposed on the jaw mounting member and rollers rotatably disposed at both ends of the roller seat. The roller seat cooperates with the screw, and the rollers cooperate with the corresponding force-receiving portions.

[0017] The prominent and beneficial technical effects of the present invention compared with the prior art are:

[0018] 1. The trigger handle of the present invention includes two pressing strokes. When pressing the first stroke, the jaws are manually closed to achieve pre-pressing. When pressing the second stroke, the motor works, and the jaws are electrically closed to achieve corresponding crimping and other operations. Therefore, through the segmented trigger device, the manual pre-tightening and electric crimping of workpieces can be achieved, which is convenient for the user to operate with one hand and improves the operation convenience.

[0019] 2. The first jaw body and the second jaw body of the present invention are both provided with abutting portions. When the jaw device and the driving device are installed, there is no need to consider the positional relationship between the first jaw body and the second jaw body, and they can be installed in either positive or negative directions.

[0020] 3. The abutting portion of the present invention is a trigger pin, and both ends respectively extend out of the side walls of the first jaw body or the second jaw body. The trigger handle has two symmetric trigger portions, which correspond to both ends of the trigger pin one by one, making the force more symmetric and labor-saving.

[0021] 4. The first jaw body and the second jaw body of the present invention are respectively engaged with both sides of the toothed slider through the first tooth portion and the second tooth portion to achieve synchronous opening or closing of the first jaw body and the second jaw body, having the advantages of good synchronism, more symmetric and stable force, etc.

[0022] 5. The present invention drives the jaws of the first jaw body and the second jaw body to automatically open through a slider reset member, so that in the non-force state, the jaws are in an open state. Compared with the jaw device with normally closed jaws, when placing or taking the workpiece, the operator is saved from manually pressing the wrench handle to open the jaws, thereby reducing the working intensity and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention.

[0024] Figure 2 It is an exploded view of the jaw device of the present invention.

[0025] Figure 3 It is one of the sectional views of the first embodiment of the present invention.

[0026] Figure 4 It is the second sectional view of the first embodiment of the present invention.

[0027] Figure 5 It is Figure 4 The partial enlarged view of the position A in

[0028] Figure 6 It is the structural schematic diagram of the toothed slider of the present invention.

[0029] Figure 7 It is the structural schematic diagram of the baffle of the present invention.

[0030] Figure 8 It is Figure 4 The partial enlarged view of the position B in

[0031] Figure 9 It is the structural schematic diagram of the screw rod of the present invention.

[0032] Figure 10 It is the structural schematic diagram of the control device of the present invention.

[0033] Figure 11 It is the exploded view of the trigger device of the present invention.

[0034] Figure 12 It is the pre-pressing structural schematic diagram of the wiring terminal crimping die installed at the jaw of the present invention.

[0035] Figure 13 It is the structural schematic diagram of the clamp tightening die installed at the jaw of the present invention.

[0036] Figure 14 It is the structural schematic diagram of the hoop removing die installed at the jaw of the present invention.

[0037] The meanings represented by the reference numerals in the figure:

[0038] Jaw device 1; driving device 2; trigger device 3; control device 4;

[0039] Clamp head mounting component 11; Clamp head mounting plate 111; Strip-shaped chute 1111; Strip-shaped hole 1112; Strip-shaped guide groove 1113; Fixed hole 1114; First clamp body 12; Clamp jaw part 121; Force-receiving part 122; Second clamp body 13; Clamp arm plate A 131; Toothed rocker arm 132; Clamp arm plate B 133; Fixed pin 134; Synchronous rotation mechanism 14; Toothed slider 141; Toothed groove part 1411; Slider protrusion 1412; First tooth part 142; Second tooth part 143; Slider reset part 144; Cylindrical pin 15; Baffle 16; Arc-shaped clamping groove 161; Blocking boss 162;

[0040] Power mechanism 21; Motor 211; Reducer 212; Reducer housing 2121; Planetary gear set 2122; Screw connection hole 2122A; Ring gear 2123; Reducer end cover 2124; Screw 213; Thread section 2131; Bearing abutment platform 2132; Reducer connection section 2133; Screw support block 214; Plain bearing 215; Retaining ring 216;

[0041] Drive mechanism 22; Roller seat 221; Guide protrusion 2211; Roller 222;

[0042] Trigger handle 31; Handle part 311; Trigger part 312; Abutting part 32; Trigger reset part 33; Trigger shaft 34;

[0043] Start signal source 41; Stop signal source 42;

[0044] Mold 100; Cable 101; Terminal 102; Pipe fitting 103; Pipe joint 104; Clamp 105. Specific embodiments

[0045] The present invention will be further described below in conjunction with specific embodiments:

[0046] Embodiment 1:

[0047] As Figure 1 shown, a handheld power tool includes a clamp head device 1, a driving device 2 for electrically driving the clamp head device 1 to act, a trigger device 3 for manually driving the clamp head device 1 to act, a control device 4 for controlling the driving device 2, and a power source for supplying power to the driving device 2. The power source is preferably a lithium battery.

[0048] As Figure 2As shown in the figure, the jaw device 1 includes a jaw mounting member 11, two cylindrical pins 15, and a first jaw body 12 and a second jaw body 13 rotatably arranged on the cylindrical pins 15 correspondingly. The first jaw body 12 and the second jaw body 13 are symmetrically arranged. Both the first jaw body 12 and the second jaw body 13 include a jaw arm plate A131, a toothed rocker arm 132, and a jaw arm plate B133 that are fixedly connected to each other. The toothed rocker arm 132 is installed between the jaw arm plate A131 and the jaw arm plate B133 through at least one fixing pin 134. The toothed rocker arm 132 is located in the rear half of the jaw arm plate A131 and the jaw arm plate B133 and is formed with a force-receiving portion 122 for driving its own rotation. The front ends of the jaw arm plate A131 and the jaw arm plate B133 form a jaw portion 121. The two jaw portions 121 of the first jaw body 12 and the second jaw body 13 together form a jaw opening. A mold 100 for processing workpieces is detachably installed in the jaw opening. The molds 100 are designed in pairs and are respectively installed on the jaw portions 121 through fasteners (such as screws). The mold 100 can be a terminal crimping mold, a pipe fitting crimping mold, a shearing mold, a clamp tightening mold, a clamp removing mold, etc., and can be replaced according to the needs of users. The mold 100 installed in this embodiment is a terminal crimping mold.

[0049] The jaw mounting member 11 has two jaw mounting plates 111 arranged in parallel and located on both sides of the first jaw body 12 and the second jaw body 13 respectively. The jaw mounting plates 111 are provided with cylindrical pin holes. The first jaw body 12 and the second jaw body 13 are respectively rotatably arranged between the two jaw mounting plates 111 through the cylindrical pins 15, and both ends of the cylindrical pins 15 are limited by circlips.

[0050] As Figure 3 、 4 shown in the figure, the jaw device 1 further includes a synchronous rotation mechanism 14 arranged between the first jaw body 12 and the second jaw body 13. The synchronous rotation mechanism 14 includes a toothed slider 141 slidably arranged on the jaw mounting member 11, a first tooth portion 142 arranged on the first jaw body 12 close to the second jaw body 13, and a second tooth portion 143 arranged on the second jaw body 13 close to the first jaw body 12.

[0051] Specifically, as Figure 4 、 5 、6 shown in the figure, at least one jaw mounting plate 111 is provided with a strip-shaped chute 1111, and the strip-shaped chute 1111 is located on the central axis of the two cylindrical pin holes.

[0052] The toothed slider 141 is a square block, the width of which is adapted to the width of the installation space formed by the two jaw mounting plates 111; at least one side of the toothed slider 141 in the width direction is provided with a slider protrusion 1412, and the toothed slider 141 linearly moves in the strip-shaped chute 1111 through the slider protrusion 1412. On both sides of the toothed slider 141 in the height direction, toothed groove portions 1411 are symmetrically arranged respectively, and the toothed groove portions 1411 have a number of toothed grooves arranged linearly. In this embodiment, both of the two jaw mounting plates 111 are provided with strip-shaped chutes 1111, and slider protrusions 1412 are symmetrically arranged on both sides of the toothed slider 141, so that the force on the toothed slider 141 is more uniform.

[0053] The outer side of the front end of the toothed rocker arm 132 abuts against the cylindrical pin 15 through an arc-shaped groove, and a number of teeth are arranged on the inner side of the front end of the toothed rocker arm 132, and the number of teeth are circumferentially distributed around the axis of the cylindrical pin 15; a force-receiving portion 122 is arranged at the rear end of the toothed rocker arm 132, and the force-receiving portion 122 is an arc-shaped longitudinally extending surface.

[0054] A number of teeth at the front end of the toothed rocker arm 132 of the first jaw body 12 form a first toothed portion 142, and a number of teeth at the front end of the toothed rocker arm 132 of the second jaw body 13 form a second toothed portion 143. The first toothed portion 142 and the second toothed portion 143 are arranged in the same direction and respectively mesh with the toothed groove portions 1411 of the toothed slider 141, so as to realize the synchronous opening or closing of the first jaw body 12 and the second jaw body 13, making the force more symmetrical and stable.

[0055] The front end of the toothed rocker arm 132 abuts against the cylindrical pin 15, which can prevent the toothed rocker arm 132 from deforming when rotating and ensure the meshing effect with the toothed slider 141. In another embodiment, the outer side of the front end of the toothed rocker arm 132 can also be sleeved on the cylindrical pin 15 through an assembly hole to achieve the same effect.

[0056] The synchronous rotation mechanism 14 further includes a slider return member 144. The slider return member 144 abuts between the toothed slider 141 and the jaw mounting member 11. The slider return member 144 is preferably a spring, which is used to drive the toothed slider 141 to move towards the jaw direction to realize the automatic opening of the jaw. In this embodiment, in the non-force state, the jaw is in the normally open state. Compared with the jaw device with a normally closed jaw, when placing or taking a workpiece, the operator is saved the operation of manually pressing the wrench handle to open the jaw, thereby reducing the working intensity and improving the processing efficiency. In another embodiment, a spring can be directly arranged between the jaw mounting member 11 and the tail of the jaw body to realize the automatic opening of the jaw.

[0057] Such as Figure 3 、 7As shown, a baffle 16 is clamped between two cylindrical pins 15. The baffle 16 is arranged on one side of the synchronous rotation mechanism 14 close to the jaws, and is located between the jaw arm plates A131 and B133 of the first jaw body 12 and the second jaw body 13, for preventing impurities from entering the synchronous rotation mechanism 14, thereby improving the service life.

[0058] The baffle 16 is a strip-shaped part. The width of the baffle 16 is adapted to the gap between the jaw arm plate A131 and the jaw arm plate B133, and the height of the baffle 16 is adapted to the height of the jaw head device 1. As Figure 3 shown, both ends of the baffle 16 of this embodiment slightly protrude from the first jaw body 12 and the second jaw body 13. Both ends of the baffle 16 are inclined for guiding impurities to slide out of the jaw head device 1. Arc-shaped clamping grooves 161 for clamping the cylindrical pins 15 are respectively formed at the back end parts of the baffle 16, facilitating the fixation of the baffle 16. A blocking boss 162 extends along the width direction in the middle of the baffle 16. The blocking boss is located in the gap between the first jaw body 12 and the second jaw body 13 and abuts against the jaw head mounting plate 111, thereby expanding the blocking area of the baffle 16, so that the baffle 16 divides the mounting space formed by the two jaw head mounting plates 111 through the two jaw head mounting plates 111, the jaw arm plate A131 and the jaw arm plate B133, further reducing the risk of impurities entering the synchronous rotation mechanism 14 and the driving device 2.

[0059] As Figure 3 、 8 shown, the driving device 2 includes a power mechanism 21 for providing power and a driving mechanism 22 connected to the output end of the power mechanism 21 and acting on the force-receiving part 122. The driving mechanism 22 drives the jaws to close through the force-receiving part 122.

[0060] Specifically, the power mechanism 21 has a motor 211, a reducer 212 and a screw 213. The reducer 212 has a reduction housing 2121. The motor 211 is fixed to one end of the reduction housing 2121 by screws. A long and narrow mounting boss is formed at the other end of the reduction housing 2121, which extends into the tails of the two jaw head mounting plates 111 and is fixed by screws and nuts, so that the motor 211, the reducer 212, the jaw head mounting component 11, the first jaw body 12 and the second jaw body 13 form a fixed structure.

[0061] As Figure 3 shown, the input end of the screw 213 is connected to the reducer 212, and the other end is rotatably arranged on the jaw head mounting component 11 through a screw support block 214. As Figure 5As shown in the figure, the screw support block 214 of this embodiment is a square block, preferably made of copper or copper alloy. Fixed protrusions extend from both sides thereof. Corresponding fixing holes 1114 are provided on the clamp head mounting plate 111. The screw support block 214 is fixed in the fixing holes 1114 through the fixed protrusions. A screw support hole is provided on the side of the screw support block 214 facing the screw 213. The outer end of the screw 213 is rotatably arranged in the screw support hole. When the screw 213 rotates, the screw support block 214 can provide a support point to prevent the end of the screw 213 from moving. Preferably, bearings or slip rings can also be provided between the screw 213 and the screw support hole to reduce the rotation resistance.

[0062] In addition, as Figure 5 shown, the slider reset member 144 abuts between the toothed slider 141 and the screw support block 214. Spring mounting posts are provided on the screw support block 214, and spring mounting holes are provided in the toothed slider 141. One end of the slider reset member 144 is sleeved on the spring mounting post, and the other end abuts in the spring mounting hole, realizing the dual use of the screw support block 214.

[0063] As Figure 8 shown, the speed reducer 212 includes a reduction housing 2121, a reduction end cover 2124, a gear ring 2123 fixedly installed in the reduction housing 2121, and a multi-stage planetary gear set 2122 installed in the gear ring 2123. The reduction end cover 2124 fixes the gear ring 2123 and the multi-stage planetary gear set 212 in the reduction housing 2121. In this embodiment, the reduction end cover 2124 is first fixed to the end face of the housing of the motor 211 through axial screws, and then fixed to one end of the reduction housing 2121 through radial screws.

[0064] The planetary gear set 2122 includes a sun gear, several planetary gears and a planetary carrier. The sun gear of the first-stage planetary gear set is connected to the main shaft of the motor 211. An irregular screw connection hole 2122A is provided at the center of the planetary carrier of the last-stage planetary gear set for connecting the screw 213. This embodiment is provided with a three-stage planetary gear set 2122.

[0065] Bearing mounting holes and screw insertion holes are provided in the mounting boss of the reduction housing 2121. A plain bearing 215 is provided in the bearing mounting hole. As Figure 9 shown, the screw 213 has a threaded section 2131 for mounting the roller seat 221, a bearing abutment platform 2132 for abutting against the plain bearing 215, and a speed reducer connection section 2133. The end of the speed reducer connection section 2133 is adapted to the shape of the screw connection hole 2122A. The speed reducer connection section 2133 of the screw 213 sequentially passes through the plain bearing 215 and the screw insertion hole and enters the screw connection hole 2122A to realize the transmission connection with the speed reducer 212. This installation method of inserting the screw 213 into the speed reducer 212 can improve the assembly efficiency.

[0066] As shown Figure 8 in the figure, a counterbore is further provided on the speed reduction housing 2121 at the outer end of the bearing mounting hole. A retaining ring 216 for restricting the outward movement of the bearing abutting platform 2132 is arranged in the counterbore. The retaining ring 216 is fixed on the speed reduction housing 2121 by the end face of the jaw head mounting plate 111, so that the outer side of the bearing abutting platform 2132 is limited by the retaining ring 216, and the inner side of the bearing abutting platform 2132 abuts against the plain bearing 215, thereby restricting the axial position of the screw 213.

[0067] As shown Figure 3 in the figure, the driving mechanism 22 has a roller seat 221 slidably arranged on the jaw head mounting member 11 and rollers 222 rotatably arranged at both ends of the roller seat 221.

[0068] Specifically, as shown Figure 8 in the figure, at least one jaw head mounting plate 111 is provided with a strip-shaped guiding groove 1113, and the strip-shaped guiding groove 1113 is arranged along the axial direction of the screw 213; at least one side of the roller seat 221 is provided with a guiding protrusion 2211 whose width is adapted to the strip-shaped guiding groove 1113, and the length of the strip-shaped guiding groove 1113 is greater than the length of the guiding protrusion 2211, so that the roller seat 221 can move along the strip-shaped guiding groove 1113. In this embodiment, both jaw head mounting plates 111 are provided with strip-shaped guiding grooves 1113, and guiding protrusions 221 are arranged at both ends of the roller seat 221 facing the jaw head mounting plates 111.

[0069] A threaded hole is provided in the middle of the roller seat 221 and it is sleeved on the screw 213. The rollers 222 cooperate with the corresponding force-receiving parts 122. When the screw 213 rotates forward or backward, the roller seat 221 moves back and forth along the axial direction of the screw 213. When the roller seat 221 moves forward, the rollers 222 drive the force-receiving parts 122 to close the jaws 121 of the first jaw body 12 and the second jaw body 13 (i.e., close the jaws), and cooperate with the mold 100 to realize functions such as crimping, shearing, and tightening.

[0070] When the roller seat 221 moves forward to drive the jaws to close, the screw 213 will receive an axial thrust from the roller seat 221. The bearing abutting platform 2132 on the screw 213 can directly abut against the plain bearing 215 to counteract this axial thrust and ensure the stable rotation of the screw 213.

[0071] As shown Figure 1 and 10 in the figure, the control device 4 includes a control board, a start signal source 41 and a stop signal source 42 for controlling the start and stop of the control motor 211. The start signal source 41 and the stop signal source 42 are preferably microswitches or Hall elements.

[0072] On the jaw mounting components 11 (i.e., the jaw mounting plates 111) at both ends of the strip-shaped guide groove 1113, there are respectively provided stop signal sources 42 for controlling the stop of the motor 211. On the outer side of the guide protrusion 2211 on one side of the corresponding roller seat 221, there extends a contact point that contacts the stop signal source 42. When the guide protrusion 2211 touches the stop signal source 42 (travel limit signal switch) near the jaw, the stop signal source 42 controls the motor 211 to stop, and at this time, the jaw reaches the maximum closing position; when the guide protrusion 2211 touches the stop signal source 42 (initial position signal switch) away from the jaw, the stop signal source 42 controls the motor 211 to stop, and at this time, the jaw reaches the initial position, and the jaw is in the maximum opening position under the action of the slider reset member 144.

[0073] In this embodiment, after the workpiece is processed, the closing position of the jaw is controlled by detecting the current of the motor. When the current reaches the set value, the control board controls the motor to stop automatically to ensure the processing quality of the workpiece. At this time, the contact point of the roller seat 221 generally does not contact the stop signal source 42 (travel limit signal switch) near the jaw. Generally, when there is no mold 100 on the jaw or the mold 100 does not meet the requirements, the stop signal source 42 will be triggered.

[0074] As Figure 2 、 11 shown, on the jaw mounting component 11, there is provided a trigger device 3 for manually driving the jaw to close. The trigger device 3 includes a trigger handle 31, a trigger shaft 34, a trigger reset member 33, and an abutting portion 32.

[0075] On one side of the tails of the two jaw mounting plates 111, there extends a wrench mounting portion. A strip-shaped hole 1112 is formed in the wrench mounting portion. The trigger shaft 34 is movably arranged in the strip-shaped hole 1112 through the trigger reset member 33. The trigger reset member 33 is preferably a U-shaped torsion spring. One end of it is sleeved on the trigger shaft 34, and the other end abuts against the abutting surface of the reduction housing 2121, driving the trigger shaft 34 to move outward from the strip-shaped hole 1112.

[0076] In another embodiment, one end of the trigger reset member 33 can also be sleeved on the trigger shaft 34, and the other end directly abuts against the jaw mounting plate 111. In fact, the reduction housing 2121 and the jaw mounting plate 111 are fixedly connected, and the same function can be achieved by directly or indirectly abutting against the jaw mounting component 11.

[0077] The trigger handle 31 is rotatably arranged on the trigger shaft 34. The trigger handle 31 has a handle part 311 for finger pressing and a trigger part 312. The handle part 311 and the trigger part 312 can be integrally formed or separately formed. This embodiment includes two trigger parts 312, which are separately formed on both sides of the handle part 311. The trigger part 312 can be a metal part to provide sufficient strength; the handle part 311 can be a plastic part or a rubber part to reduce costs and improve the comfort of finger pressing.

[0078] The abutting part 32 is arranged at the tail of the first jaw body 12 or / and the second jaw body 13. The abutting part 32 in this embodiment is a trigger pin, which is correspondingly installed in the trigger pin mounting hole at the tail of the first jaw body 12 or / and the second jaw body 13. Both ends of the trigger pin respectively protrude from the side wall of the first jaw body 12 or the second jaw body 13 and correspond to the two trigger parts 312 one by one.

[0079] In this embodiment, the abutting parts 32 are arranged on both the first jaw body 12 and the second jaw body 13. When the jaw head device 1 and the driving device 2 are installed, there is no need to consider the positional relationship between the first jaw body 12 and the second jaw body 13, that is, they can be installed in either the correct or reverse orientation. In addition, the abutting part 32 can also be a convex or groove structure integrally formed on the first jaw body 12 or the second jaw body 13.

[0080] The start signal source 41 is fixed on the wrench mounting part of the jaw head mounting plate 111 and is located on the rotation path of the trigger handle 31.

[0081] The trigger handle 31 of the present invention has two pressing strokes and three critical positions, namely the initial position, the first position, and the second position. In this embodiment, the first position is also called the pre-pressing position, and the second position is also called the switch starting position.

[0082] The jaws of this embodiment are normally open jaws, and the corresponding die actions are realized by closing the jaws.

[0083] As Figure 12 shown, the workpieces in this embodiment are the cable 101 and the terminal 102. After the cable 101 and the terminal 102 are assembled and placed in the terminal crimping die, the user first presses the first stroke of the trigger handle 31, that is, the trigger handle 31 is pressed from the initial position to the first position. During this process, the trigger handle 31 rotates around the trigger shaft 34, and drives one of the jaw bodies (the first jaw body 12 or the second jaw body 13) to close through the abutting part 32. When the toothed rocker arm 132 of this jaw body rotates, it will drive the toothed slider 141 to linearly move and realize the synchronous rotation of the toothed rocker arm 132 of the other jaw body, so that the jaws close synchronously to realize the pre-pressing and positioning of the workpiece, facilitating the user to observe whether the processing position is correct. At this time, the trigger handle 31 is in the pre-pressing position.

[0084] Then continue to press the second stroke of the trigger handle 31, that is, press the trigger handle 31 from the first position to the second position. During this process, the trigger handle 31 rotates around the abutting portion 32, and the trigger shaft 34 is pressed down, so as to make the trigger handle 31 trigger the start signal source 41. At this time, the trigger handle 31 is in the switch start position, the motor 211 works and drives the screw 213 to rotate, and the driving mechanism 22 moves towards the jaw direction to realize the closing of the jaw. When the control device 4 detects that the current of the motor 211 reaches the set value, the control device 4 stops the motor 211 and shorts the brake to complete the crimping of the wire and the terminal.

[0085] When the trigger handle 31 is released, the start signal source 41 is disconnected, and the control device 4 drives the motor to reverse, and the roller seat 221 resets. When it touches the stop signal source 42 (initial position signal switch) far from the jaw, the motor stops and waits to enter the next working state.

[0086] In the first stroke of pressing the trigger handle 31, the resistance mainly comes from the slider reset member 144, that is, it is necessary to overcome the first acting force of the slider reset member 144 to drive the jaw to open through the jaw device 1; in the second stroke of pressing the trigger handle 31, the resistance mainly comes from the trigger reset member 33, that is, it is necessary to overcome the second acting force of the trigger reset member 33 to push the trigger shaft 34 outward. In this embodiment, the second acting force of the trigger reset member 33 on the trigger handle 31 is greater than the first acting force of the slider reset member 144 on the trigger handle 31.

[0087] Generally, the elastic coefficient of the trigger reset member 33 is greater than that of the slider reset member 144. At this time, in the first pressing stroke of the trigger handle 31, it is ensured that the trigger reset member 33 will not be pressed. When the user presses the first stroke, since the jaw abuts against the workpiece and the hand can no longer be pressed manually, there will be an obvious change in the acting force, thus reminding the user that the pre-crimping position has been reached; when the pre-crimping position is the correct crimping position of the workpiece, continue to press the trigger handle 31 to start the motor and realize electric crimping.

[0088] In this embodiment, by pressing the trigger handle 31 in a segmented manner, the manual pre-crimping and electric crimping of the workpiece can be realized before and after, which is convenient for the user to operate with one hand and improves the operation convenience.

[0089] Embodiment Two:

[0090] The application scenario of this embodiment is the tightening of the clamp. The clamp in this embodiment specifically refers to a reusable earless clamp, and the earless clamp has a tension hook and a load retaining hook.

[0091] Such as Figure 13As shown in the figure, a pair of clamp tightening dies (claw for tightening) for tightening the clamp 105 are installed on the jaws of the jaw device 1. First, the clamp 105 is sleeved on the connection between the pipe fitting 103 (rubber pipe) and the pipe joint 104, and then the trigger handle 31 is pre-pressed so that the claws of the clamp tightening die (claw for tightening the stop clamp) respectively extend into the corresponding tension hooks of the clamp 105. Then, the trigger handle 31 is continuously pressed to start the motor 211 to work, and the clamp 105 is tightened. When the load holding hook of the clamp 105 is latched, the trigger handle 31 is released, the motor is reversed to reset, and the jaws automatically open, waiting for the next operation.

[0092] Embodiment Three:

[0093] The application scenario of this embodiment is the release of the clamp. The clamp in this embodiment specifically refers to a reusable earless clamp, which has a load holding hook, a release hook, and a pre-fixed hook engaged with the release hook.

[0094] As Figure 14 shown in the figure, a pair of clamp removing dies (claw for removing the clamp) for releasing the clamp 105 are installed on the jaws of the jaw device 1. The trigger handle 31 is pre-pressed so that the claws of the clamp removing die (claw for removing the clamp) respectively extend into the release hook and the pre-fixed hook of the clamp 105. Then, the trigger handle 31 is continuously pressed to start the motor 211 to work, and the clamp is tightened. When the load holding hook is separated, the trigger handle 31 is released, the motor is reversed to reset, and the jaws automatically open, waiting for the next operation.

[0095] Embodiment Four:

[0096] This embodiment is basically the same as Embodiment One, and the difference lies in the structure of the driving mechanism 22.

[0097] Specifically, the driving mechanism 22 has a driving seat slidably arranged on the jaw mounting member 11 and connecting rods symmetrically hinged at both ends of the driving seat. The other end of one connecting rod is hinged on the force receiving portion 122 of the first jaw body 12, and the other end of the other connecting rod is hinged on the force receiving portion 122 of the second jaw body 13.

[0098] A threaded hole is formed in the middle of the driving seat and it is sleeved on the screw rod 213. When the screw rod 213 rotates forward or backward, the driving seat moves back and forth along the axis of the screw rod, and the jaws are opened or closed through the connecting rods.

[0099] Embodiment Five:

[0100] This embodiment is basically the same as Embodiment One, and the difference lies in:

[0101] The jaws of this embodiment are normally closed jaws.

[0102] The user drives the trigger handle 31 to move in the first stroke, that is, the trigger handle 31 moves from the initial position to the first position. The trigger handle 31 rotates around the trigger axis 34 and drives one of the pliers bodies (the first pliers body 12 or the second pliers body 13) to open through the abutting portion 32, so that the jaws open synchronously, realizing the pre-positioning function of the corresponding jaw device 1.

[0103] Then, continue to drive the trigger handle 31 to move in the second stroke, that is, the trigger handle 31 moves from the first position to the second position. During this process, the trigger handle 31 rotates around the abutting portion 32 as the center, and the trigger axis 34 moves, so that the trigger handle 31 triggers the start signal source 41. At this time, the trigger handle 31 is in the switch start position, the motor 211 works and drives the screw 213 to rotate, realizing the closing or opening action of the jaws.

[0104] The above embodiments are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A hand-held power tool, characterized in that, Comprising: A jaw device (1), including a jaw mounting member (11) and a first jaw body (12) and a second jaw body (13) rotatably arranged on the jaw mounting member (11). Both the first jaw body (12) and the second jaw body (13) have a jaw portion (121) for forming a jaw and a force-receiving portion (122) for driving their own rotation. A driving device (2), including a power mechanism (21) for providing power and a driving mechanism (22) connected to the output end of the power mechanism (21) and acting on the force-receiving portion (122). The driving mechanism (22) drives the jaw to close through the force-receiving portion (122). A control device (4), including a start signal source (41) for controlling the operation of the power mechanism (21); and A trigger device (3) for manually driving the jaw to close and triggering the control device (4) to work. Wherein, the trigger device (3) includes: A trigger shaft (34) movably arranged in a strip-shaped hole (1112) at the rear end of the jaw mounting member (11) through the trigger return member (33). A trigger handle (31) rotatably arranged on the trigger shaft (34), and having a handle portion (311) for finger pressing and a trigger portion (312). An abutting portion (32) arranged at the tail of the first jaw body (12) or / and the second jaw body (13) and corresponding to the trigger portion (312). Press the handle portion (311) of the trigger handle (31), and the trigger portion (312) drives the jaw to close and triggers the start signal source (41) through the abutting portion (32).

2. The hand-held electric tool according to claim 1, characterized in that: Among them, The trigger handle (31) has an initial position, a pre-pressing position and a switch starting position: When the trigger handle (31) is pressed from the initial position to the pre-pressing position, the trigger handle (31) rotates around the trigger shaft (34), so that the jaw can pre-press the workpiece. When the trigger handle (31) is pressed from the pre-pressing position to the switch starting position, the trigger handle (31) rotates around the abutting portion (32) and drives the trigger shaft (34) to move, thereby triggering the start signal source (41) and realizing the closing of the jaw through the driving device (2).

3. The hand-held electric tool according to claim 1, characterized in that: Among them, The trigger handle (31) has two symmetric trigger portions (312); The abutting portion (32) is correspondingly arranged on the two side walls of the first jaw body (12) or / and the second jaw body (13) and corresponds to the two trigger portions (312) one by one.

4. The hand-held electric tool according to claim 3, characterized in that: Among them, The abutting portion (32) is a trigger pin correspondingly installed in a trigger pin mounting hole at the tail of the first jaw body (12) or / and the second jaw body (13), and both ends of the trigger pin respectively extend out of the side wall of the first jaw body (12) or the second jaw body (13).

5. The hand-held electric tool according to claim 1, characterized in that: Among them, The trigger reset member (33) is a U-shaped torsion spring, one end of which is sleeved on the trigger shaft (34), and the other end directly or indirectly abuts against the jaw mounting member (11), driving the trigger shaft (34) to move outward of the strip-shaped hole (1112).

6. A hand-held power tool according to any one of claims 1-5, It is characterized in that: Wherein, the jaw device (1) further includes a synchronous rotation mechanism (14) arranged between the first jaw body (12) and the second jaw body (13), and the synchronous rotation mechanism (14) includes: A toothed slider (141), slidably arranged on the jaw mounting member (11), A first tooth portion (142), arranged on the first jaw body (12) close to the second jaw body (13), and meshing with the toothed slider (141); A second tooth portion (143), arranged on the second jaw body (13) close to the first jaw body (12), and meshing with the toothed slider (141); and A slider reset member (144), abutted between the toothed slider (141) and the jaw mounting member (11), for driving the toothed slider (141) to move to realize the automatic opening of the jaws.

7. A handheld power tool according to claim 6, It is characterized in that: Wherein, when pressing the trigger handle (31), The resistance of the slider reset member (144) acting on the trigger handle (31) through the jaw device (1) is the first acting force; The resistance of the trigger reset member (33) acting on the trigger handle (31) through the trigger shaft (34) is the second acting force; The second acting force is greater than the first acting force.

8. A hand-held electric tool according to claim 6, characterized in that: Among them, Both the first jaw body (12) and the second jaw body (13) include a jaw arm plate A (131), a toothed rocker arm (132) and a jaw arm plate B (133) that are fixedly connected to each other; The toothed rocker arm (132) has a plurality of teeth for forming the first tooth portion (142) or the second tooth portion (143) and a longitudinally extending surface for forming the force-receiving portion (122); Toothed groove portions (1411) corresponding to the first tooth portion (142) and the second tooth portion (143) are respectively arranged on both sides of the toothed slider (141), By the rotation of one of the toothed rocker arms (132), the linear movement of the toothed slider (141) can be driven and the synchronous rotation of the other toothed rocker arm (132) can be realized.

9. A hand-held electric tool according to claim 6, characterized in that: Among them, The jaw mounting member (11) has jaw mounting plates (111) respectively arranged on both sides of the first jaw body (12) and the second jaw body (13), and at least one jaw mounting plate (111) is provided with a strip-shaped chute (1111), At least one side of the toothed slider (141) is provided with a slider projection (1412), and the toothed slider (141) linearly moves in the strip-shaped chute (1111) through the slider projection (1412).

10. A hand-held electric tool according to claim 6, characterized in that: Among them, The power mechanism (21) includes a motor (211), a speed reducer (212), and a screw rod (213). The motor (211) is fixed on the jaw mounting member (11) through the speed reducer (212). The input end of the screw rod (213) is connected to the speed reducer (212), and the other end of the screw rod (213) is rotatably arranged on the jaw mounting member (11) through a screw rod support block (214). The driving mechanism (22) includes a roller seat (221) slidably arranged on the jaw mounting member (11) and rollers (222) rotatably arranged at both ends of the roller seat (221). The roller seat (221) cooperates with the screw rod (213), and the rollers (222) cooperate with the corresponding force receiving portions (122).

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