Electric crimping pliers

Abstract

The invention relates to electric crimping pliers, and belongs to the technical field of electric tools. The tool comprises a front supporting plate and a rear supporting plate which are fixed in a machine shell, and a driving shaft which is installed at one end of the machine shell and driven by a motor. The front and rear support plates are hinged with the left and right jaws, the front and rear adjusting levers and the switch wrench; an electric sliding groove is formed in the front supporting plate, the electric sliding groove and a motor driving block form a moving pair, and one end of the motor driving block is provided with an electric opening inclined face. A manual sliding groove is formed in the rear supporting plate, the manual sliding groove and a manual driving block form a moving pair, and the manual driving block is provided with a manual opening inclined face. A left sliding block and a right sliding block are installed on the front supporting plate and the rear supporting plate and hinged to the inner ends of the left jaw and the right jaw respectively, and an elastic pulling piece is installed between the left sliding block and the right sliding block. When the switch wrench is released, the left sliding block and the right sliding block are reset under the action of the elastic pulling piece, so that the left jaw and the right jaw are opened. The operation time can be shortened, and the efficiency can be improved; and the jaw can be automatically opened, so that the operation is more convenient.

Description

Technical Field

[0001] The invention relates to an electric crimping tool, in particular to a handheld electric crimping pliers, belonging to the technical field of electric tools. Background Art

[0002] The typical structure of electric crimping pliers is disclosed in the Chinese patent application number 201380042456.8. Since the motor has an "idle stroke" after manual switching to electric, which affects the working efficiency, the Chinese patent application number 202311379628.2 proposes an electric crimping tool. Since the closure of the pliers mouth of the improved technical solution is not only driven manually and electrically in turn, so as to achieve manual rapid clamping and electric force tightening, but also because the manual loading and electric loading are separated from each other and partially overlapped, the electric direct drive loading part reduces the "idle stroke" of the manual loading part, which can shorten the working time and improve the working efficiency. However, it is found in practice that the above-mentioned improved technical solution has the disadvantage that the jaws do not have the automatic opening function. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art and to provide an electric wire crimping pliers which can not only reduce the "idle travel" but also open the jaws automatically, thereby making the operation and use more convenient.

[0004] In order to achieve the above purpose, the basic technical scheme of the electric crimping pliers of the present invention is: comprising front and rear support plates fixed in the casing, and a drive shaft driven by a motor installed at one end of the casing; The front and rear support plates are hinged at one end away from the motor to support the left and right jaws, the middle part is coaxially hinged to support the front and rear adjustment levers, and the lower part is hinged to support the switch wrench; the end of the switch wrench away from the handle is respectively engaged with the adjacent ends of the front and rear adjustment levers; An electric slide groove extending along the axial direction of the drive shaft is opened in the middle of the front support plate, and the electric slide groove and the motor drive block form a moving pair, and one end of the motor drive block has a symmetrical electric support inclined surface; A manual slide groove extending axially along the drive shaft is provided in the middle of the rear support plate, the manual slide groove and the manual drive block form a moving pair, and one end of the manual drive block has a symmetrical manual opening inclined surface; One of the front and rear support plates is provided with a left slider and a right slider respectively forming a moving pair perpendicular to the axial direction, the left slider and the right slider are respectively hinged to the inner ends of the left and right jaws, and an elastic pulling member is provided between the left and right sliders; When the switch wrench is in the initial manual stroke, one end of the rear adjusting lever presses down the manual driving block, gradually expanding the manual expanding inclined surface to expand the left and right sliders, driving the left and right jaws to close; when the switch wrench is in the later electric stroke, the starting trigger motor is triggered to drive the electric driving block, and its electric expanding inclined surface continues to expand the left and right sliders, driving the left and right jaws to close; After releasing the switch wrench, the left and right sliders are reset under the action of the elastic pulling member, causing the left and right jaws to open.

[0005] Since the present invention not only maintains the structural characteristics of separately arranging the manual and electric driving loading members in 202311379628.2, the connection between manual and electric closing of the jaws is compact. The electric driving member does not need to repeat the "idle stroke" of the manual driving member shifting after starting, which can shorten the operation time and improve efficiency. Moreover, due to the structure of the left and right sliders that can be elastically pulled and reset, the jaws can be automatically opened, making the operation more convenient.

[0006] A further improvement of the present invention is that on the sides of the left and right sliders away from their respective guide posts, there are respectively an expanding cam and a spring hanging pin, and a tension spring is installed between the spring pins of the left and right sliders.

[0007] Furthermore: In the middle of the front support plate, there are expanding chutes respectively located on both sides of the electric chute, and in the middle of the rear support plate, there is a relief groove extending from one end of the manual chute towards both sides.

[0008] Furthermore: The expanding chutes on both sides of the electric chute are respectively inserted with guide posts that pass through the relief groove of the rear support plate and form a moving pair therewith.

[0009] Furthermore: The front adjusting lever is located outside the front support plate, and the rear adjusting lever is located outside the rear support plate.

[0010] Furthermore: The drive shaft and the central hole of the motor drive block form a screw pair.

[0011] Furthermore: At the ends of the front and rear support plates adjacent to the jaws, there are front covers installed.

[0012] Furthermore: The machine shell is formed by mating two half shells. Description of the Drawings

[0013] The present invention will be further described below in conjunction with the drawings.

[0014] Figure 1 is the three-dimensional exploded structural schematic diagram of Embodiment 1 of the present invention.

[0015] Figure 2 is Figure 1 the structural schematic diagram of the initial position of the embodiment.

[0016] Figure 3 is Figure 2 the rear view structural schematic diagram of

[0017] Figure 4 is Figure 1 the structural schematic diagram of the manual crimping in the embodiment.

[0018] Figure 5 is Figure 4 the rear view structural schematic diagram of

[0019] Figure 6 is Figure 1 the structural schematic diagram of the electric crimping in the embodiment.

[0020] Figure 7 is Figure 6 the rear view structural schematic diagram of

[0021] In the figure, 10: housing; 20: rear adjusting lever; 30: rear support plate; 40: left jaw; 50: right jaw; 60: front support plate; 70: switch wrench; 80: tension spring; 90: manual driving block; 101: micro switch 1; 102: micro switch 2; 103: micro switch 3; 104: micro switch 4; 110: right slider; 120: left slider; 130: motor driving block; 140: front cover; 150: oil storage cover; 160: motor; 170: gear box; 171: output shaft; 180: front adjusting lever; 190: reset compression spring; 210: disc gasket. Detailed implementation manners Embodiment

[0022] The overall structure of the electric wire crimping pliers in this embodiment is as Figure 1As shown in the figure, the front and rear support plates 60 and 30 are fixed in the casing 10 formed by the mating of two half-casings. At one end of the casing 10, a drive shaft 171 extending into the casing 10 driven by a motor 160 through a gearbox 170 is installed. The drive shaft 171 and the central hole of the motor drive block 130 form a screw pair for realizing transmission connection, and a disc spring 210 for buffering is installed between them. The left and right jaws 40 and 50 located between the front and rear support plates 60 and 30 are respectively hinged at both sides of the ends of the front and rear support plates 60 and 30 far from the motor, and the front and rear adjustment levers 180 and 20 are coaxially hinged at one side of the middle part, and the switch wrench 70 is hinged at one side of the lower part. The front adjustment lever 180 is located outside the front support plate 60, and the rear adjustment lever 20 is located outside the rear support plate 30. The partial teeth at the end of the switch wrench 70 far from the handle are respectively engaged with the adjacent ends of the front and rear adjustment levers 180 and 20, and a return compression spring 190 is installed at the part where it disengages from the engagement. These basic structures are similar to those of the prior art. The inner ends of the left and right jaws 40 and 50 are respectively equipped with rollers. The front and rear support plates 60 and 30 are equipped with a front cover 140 at the ends adjacent to the jaws to prevent foreign objects and debris from entering the interior of the casing. The front and rear support plates 60 and 30 are also equipped with a microswitch 101 for controlling the forward rotation of the electric start, a microswitch 104 for controlling the reverse rotation of the electric, a microswitch 102 for controlling the stop when the jaws are closed in place, and a microswitch 103 for controlling the stop when the jaws are opened in place through mounting plates.

[0023] An electric chute 60a extending along the axial direction of the drive shaft 171 and spreading chutes 60b located on both sides of the electric chute are respectively opened in the middle of the front support plate 60. The electric chute 60a forms a moving pair with a protrusion 130b (see Figure 2 ) on the adjacent surface of the motor drive block 130. One end of the motor drive block 130 has symmetric electric spreading inclined surfaces 130a corresponding to the two rollers respectively.

[0024] A manual chute 30a extending along the axial direction of the drive shaft and a relief groove 30b extending from one end of the manual chute to both sides are respectively opened in the middle of the rear support plate 30. The manual chute 30a forms a moving pair with a protrusion 90a on the adjacent surface of the manual drive block 90. One end of the manual drive block has symmetric manual spreading inclined surfaces 90b.

[0025] The left and right sliders 120 and 110 are respectively hinged to the inner ends of the left and right jaws 40 and 50. The sides of them far from the guide post 110c respectively have spreading cams 110b and spring hook pins 110a. A tension spring 80 is installed between the spring pins of the left and right sliders. The spreading chutes 60b on both sides of the electric chute 60a are respectively inserted with guide posts 110c that pass through the relief groove 30b of the rear support plate 30 and form a moving pair with it.

[0026] When the switch wrench 70 is in the natural state under the action of the return compression spring 190, as Figure 2 ,Figure 3 As shown, the left and right jaws 40 and 50 are open.

[0027] When the switch wrench 70 is in the initial manual stroke, as Figure 4 , Figure 5 shown, one end of the rear adjustment lever 20 presses down the manual drive block 90, so that the manual expansion inclined surface 90b acts on the expansion cam 110b to gradually expand the left and right sliders 120 and 110, driving the left and right jaws 40 and 50 to close.

[0028] When the switch wrench is in the later electric stroke, one side of it triggers the micro switch 101, as Figure 6 , 7 shown, the motor 160 drives the electric drive block 130 through the helical pair of the gearbox 170 and the drive shaft, so that the electric expansion inclined surface 130a expands the left and right sliders 120 and 110 through the corresponding rollers, driving the left and right jaws 40 and 50 to close until the micro switch 102 is triggered to stop the machine after closing.

[0029] When the switch wrench 70 is released, the left and right sliders 120 and 110 reset under the action of the tension spring 80, driving the left and right jaws 40 and 50 to open to the Figure 2 , 3 shown natural state position.

[0030] In the above process, when an emergency occurs, etc., the micro switch 104 can be triggered to reverse the motor, so that the left and right jaws 40 and 50 open; and once the predetermined jaw opening limit position is reached, the micro switch 103 is triggered and the motor stops.

[0031] Tests show that since the manual and electric drives of this embodiment are set separately, the jaw closing is first manual and then electric, with a compact connection, effectively reducing the "idle stroke", which can shorten the operation time and improve the efficiency. More importantly, the left and right sliders enable the jaws to open automatically, making the operation more convenient. In addition, in the prior art, both the manual drive device and the electric drive device are placed in the middle of the support plate, while the manual drive part of this embodiment is placed outside the corresponding support plate, and the size of the electric drive part is also further reduced; in addition, two PCB boards need to be set inside the prior art, which is large in volume due to the complex structure, while this embodiment integrates the micro switch on a connecting plate, so the structure is compact and helps to reduce the volume.

[0032] In addition to the above embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An electric wire crimping pliers comprising front and rear support plates (60, 30) fixed in a housing (10), and a drive shaft (171) driven by a motor (160) mounted at one end of the housing; The front and rear support plates are hingedly supported at one end away from the motor with left and right jaws (40, 50), the middle part is coaxially hingedly supported at one side with front and rear adjustment levers (180, 20), and the lower part is hingedly supported at one side with a switch wrench (70); the switch wrench is respectively meshed with the adjacent ends of the front and rear adjustment levers at one end away from the handle; the characteristics are: An electric slide groove extending axially along the drive shaft is provided in the middle of the front support plate, the electric slide groove and the motor drive block (130) form a moving pair, and one end of the motor drive block has a symmetrical electric opening inclined surface; A manual slide groove extending axially along the drive shaft is provided in the middle of the rear support plate, the manual slide groove and the manual drive block (90) form a moving pair, and one end of the manual drive block has a symmetrical manual opening inclined surface; One of the front and rear support plates is provided with left and right sliders (120, 110) respectively forming a movable pair perpendicular to the axial direction, the left and right sliders are respectively hinged to the inner ends of the left and right jaws, and an elastic pulling member (80) is provided between the left and right sliders; When the switch wrench is in the early manual stroke, one end of the rear adjustment lever presses down the manual drive block, so that the manually opened inclined surface gradually opens the left and right sliders, driving the left and right jaws to close; when the switch wrench is in the late electric stroke, the starter motor is triggered to drive the electric drive block, so that the electrically opened inclined surface continues to open the left and right sliders, driving the left and right jaws to close; When the switch wrench is released, the left and right sliding blocks are reset under the action of the elastic pulling member, so that the left and right jaws are opened.

2. The electric wire pressing pliers according to claim 1, characterized in that: The left and right sliding blocks are provided with a spreading cam and a tension spring hanging pin at one side away from the respective guide pillars, and a tension spring is arranged between the tension spring pins of the left and right sliding blocks.

3. The electric wire crimping pliers according to claim 2, wherein: The front support plate is provided with a support slot in the middle thereof, which is respectively located at both sides of the electric slot. The rear support plate is provided with a yield slot in the middle thereof, which extends from one end of the manual slot to both sides.

4. The electric wire pressing pliers according to claim 3, characterized in that: The expanded slide grooves on both sides of the electric slide groove are respectively inserted through the rear support plate's clearance groove to form guide columns of the moving pair.

5. The electric wire pressing pliers according to claim 4, characterized in that: The front adjusting lever is located outside the front supporting plate, and the rear adjusting lever is located outside the rear supporting plate.

6. The electric wire pressing pliers according to claim 5, characterized in that: The driving shaft and the central hole of the motor driving block form a spiral pair.

7. The electric wire pressing pliers according to claim 6, characterized in that: One end of the front and rear supporting plates adjacent to the jaws is provided with a front cover.

8. The electric wire pressing pliers according to claim 7, characterized in that: The casing is formed by combining two half shells.

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