CN219959665U - Wire cutting and peeling device - Google Patents

Abstract

The utility model discloses a wire cutting and peeling device which comprises a working platform, and a wire cutting frame, a propelling guide rail, a propelling cylinder, a pressing guide rail and a fixing frame which are arranged on the working platform, wherein two first pneumatic fingers, a cutting cylinder and a pressing block are arranged on the wire cutting frame; this peeling device is through setting up the cut-off stand, utilize the first pneumatic finger of cut-off stand to realize fixed wire rod, then through cutting cylinder, cut cutter, compact heap, realize cutting wire shell in the wire rod, then through lift cylinder, mount, the pneumatic finger of second, the pneumatic finger of third, realize pulling out wire shell in the wire rod after will cutting, realize cutting out the wire rod, skin to follow-up with terminal and wire connection pressfitting, whole process degree of automation is high, machining efficiency is high.

Description

Wire cutting and peeling device

Technical Field

The utility model relates to the technical field of machinery, in particular to a wire cutting and peeling device.

Background

The terminal is a member to which the battery is connected to the external conductor. In electroengineering, a terminal is a multi-finger wire-connecting terminal, namely a wiring terminal, which is divided into a single hole, a double hole, a socket, a hook and the like, and the functions of the terminal are mainly used for transmitting electric signals or conducting electricity from materials such as copper silver plating, copper zinc plating, copper, aluminum, iron and the like; the existing terminal is generally connected with the wire in a pressing mode, but before the wire is connected in a pressing mode, the wire needs to be cut and peeled, the wire can only be subjected to subsequent pressing processing, but the existing device can only be subjected to one procedure, so that a plurality of devices are needed to finish the pressing processing of the terminal, and the overall efficiency is low. The utility model discloses a publication number is CN114421251A, discloses an automatic wire stripping and terminal making machine, relates to wire processing technology field, including workstation and chute, the chute sets up in workstation one side, and the workstation is being close to chute one side and is being equipped with feeding mechanism, first fixture and wire stripping mechanism in proper order along wire direction of delivery, and first fixture one side is equipped with first wire stripping mechanism, and the opposite side is equipped with tangent line mechanism and second fixture in proper order, and second fixture one side is equipped with the second and beats the terminal mechanism, and second is beaten terminal mechanism and is being beaten the terminal mechanism and setting of wire stripping mechanism in the homonymy. According to the wire stripping mechanism, the first clamping mechanism is matched with the wire stripping mechanism and the first terminal punching mechanism, the skin stripping and terminal punching processing of one end of the wire is realized, the second clamping mechanism is matched with the wire cutting mechanism and the second terminal punching mechanism, the skin stripping and terminal punching processing of the other end of the wire is realized, and finally the skin stripping and terminal punching processing of the two ends of the wire is realized. The terminal crimping machine can strip the outer skin and crimp the terminals, but has lower automation degree, and can not realize automatic feeding and lamination of the terminals.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a wire cutting and peeling device with high automation degree.

In order to achieve the above purpose, the present utility model provides the following solutions: the utility model provides a cut out line peeling device, includes work platform and the cut out line frame, propulsion guide rail, propulsion cylinder, pressfitting guide rail, the mount of setting on work platform, be provided with two first pneumatic fingers on the cut out line frame, cut out cylinder, compact heap, cut out the line frame and be used for placing the wire rod, two first pneumatic fingers interval sets up, first pneumatic fingers are used for jointly centre gripping wire rod, compact heap and cut out cylinder and set up from top to bottom, cut out the vertical setting of cylinder, cut out the cylinder and upwards be connected with and cut out the cutter, compact heap and cut out the cooperation and cut out the wire rod jointly from top to bottom;

the horizontal direction of the propelling guide rail is set, the propelling guide rail is connected with a propelling seat in a sliding manner, a second pneumatic finger and two third pneumatic fingers are arranged on the propelling seat, the second pneumatic finger and the two third pneumatic fingers are sequentially arranged at intervals, the second pneumatic finger is used for clamping a plurality of wires in the wire rod, the third pneumatic finger is used for clamping the wire rod, the propelling cylinder is connected with the propelling seat and used for driving the propelling seat to be close to the wire cutting frame and driving the second pneumatic finger to align to a fixing frame or a pressing guide rail, and a fixing cylinder is arranged on the fixing frame and used for pressing the plurality of wires of the wire rod.

The beneficial effects of the utility model are as follows: realize the automation of terminal cut out the line, skin, this peeling device is through setting up cut out the line frame, utilize the first pneumatic finger of cut out the line frame to realize fixed wire rod, then through cutting cylinder, cut out cutter, compact heap, realize cutting the electric wire shell in the wire rod, then through fixed cylinder, mount, the pneumatic finger of second, the pneumatic finger of third, realize pulling out the electric wire shell in the wire rod after cutting out, realize cutting out the line of wire rod, skin to follow-up with terminal and wire connection pressfitting, whole process degree of automation is high, machining efficiency is high.

Further, a sliding guide rail is arranged on the working platform, the sliding guide rail is arranged in the horizontal direction, the sliding guide rail is perpendicular to the propelling guide rail, a sliding seat is connected to the sliding guide rail in a sliding mode, and the propelling guide rail and the propelling cylinder are arranged on the sliding seat. After the structure is adopted, the propelling seat is driven to translate.

Further, the bottom of the working platform is provided with a servo motor, the servo motor is connected with a driving wheel, the bottom of the working platform is rotationally connected with a driving screw, the driving screw is in threaded connection with a sliding seat, the driving screw is coaxially connected with a driven wheel, and the driving wheel is connected with the driven wheel through a driving belt.

Further, the first pneumatic finger is connected with two first clamping jaws, two the first clamping jaws are used for jointly clamping wires, the second pneumatic finger is connected with two second clamping jaws, two opposite sides of the second clamping jaws are provided with a plurality of first clamping grooves, the first clamping grooves are arranged in parallel, every two opposite upper and lower first clamping grooves are used for jointly clamping one wire of the wires, and the third pneumatic finger is connected with two third clamping jaws which are used for jointly clamping the wires. After the structure is adopted, the wire rod and a plurality of wires in the wire rod are respectively clamped.

Further, be provided with translation guide rail, translation cylinder on the work platform, translation guide rail is parallel with the sliding guide rail, sliding connection mount on the translation guide rail, translation cylinder connects the mount, be provided with many montants on the mount, many the montant top is connected with the fixed plate jointly, be provided with fixed cylinder on the fixed plate, fixed cylinder downwardly connected has the fixed block, the fixed block is used for compressing tightly the wire end of wire rod on the mount.

Further, a fourth pneumatic finger is arranged on the sliding seat and aligned with the pressing guide rail, the fourth pneumatic finger is located between the second pneumatic finger and the third pneumatic finger, the fourth pneumatic finger is connected with two fourth clamping jaws, a plurality of second clamping grooves are formed in opposite sides of the two fourth clamping jaws, the second clamping grooves are arranged in parallel, and each two of the second clamping grooves are opposite to each other up and down and are used for jointly clamping one electric wire of the wire. After the structure is adopted, the fourth pneumatic finger is arranged, so that the electric wire positioning device has a positioning function, and the electric wire is pushed into the pressing frame to be pressed with the terminal after the electric wire after being peeled is clamped by the fourth pneumatic finger.

Further, be provided with the support on the work platform, be provided with material loading guide rail, material loading cylinder, pressfitting guide rail, pressfitting cylinder on the support, the material loading guide rail is used for carrying the terminal one by one, the pressfitting guide rail is connected to the discharge end of material loading guide rail, be provided with the pressfitting frame on the pressfitting guide rail, the material loading cylinder is used for pushing the terminal to pressfitting frame department one by one.

Further, open on the pressfitting guide rail has first recess and the second recess that runs through the pressfitting guide rail, the piston rod of pressfitting cylinder articulates there is the swinging arms, swinging arms middle part rotates the linking bridge, the swinging arms tip articulates there is the pressfitting piece, the pressfitting piece top has formed stopper and top briquetting respectively, the stopper upwards wears out first recess and is used for restricting the terminal removal, the top briquetting upwards wears out the second recess and is used for pressing the electric wire of wire rod in the terminal. After the structure is adopted, the press fit of the terminal and the electric wire is realized.

Drawings

Fig. 1 is a perspective view of the whole structure of the present utility model.

Fig. 2 is a partial enlarged view of fig. 1 at a.

Fig. 3 is a perspective view of the whole structure of the present utility model.

Fig. 4 is a partial enlarged view of fig. 3 at B.

Fig. 5 is a partial enlarged view of fig. 3 at C.

Fig. 6 is a perspective view of the whole structure of the present utility model.

Wherein 1 is a working platform, 21 is a pushing guide rail, 211 is a pushing seat, 22 is a pushing cylinder, 23 is a second pneumatic finger, 231 is a second clamping jaw, 232 is a first clamping groove, 24 is a third pneumatic finger, 241 is a third clamping jaw, 25 is a fourth pneumatic finger, 251 is a fourth clamping jaw, 252 is a second clamping groove, 26 is a sliding guide rail, 261 is a sliding seat, 27 is a servo motor, 271 is a driving wheel, 272 is a driving belt, 28 is a driving screw, 281 is a driven wheel, 3 is a cutting frame, 31 is a first pneumatic finger, 311 is a first clamping jaw, 32 is a pressing block, 33 is a cutting cylinder, 331 is a cutting knife, 4 is a bracket, 41 is a feeding guide rail, 42 is a feeding cylinder, 43 is a pressing guide rail, 431 is a pressing frame, 44 is a pressing cylinder, 45 is a swinging rod, 46 is a pressing block, 461 is a limiting block, 462 is a pressing block, 51 is a fixed frame, 511 is a vertical rod, 512 is a fixed plate, 52 is a fixed cylinder, 521 is a fixed block, 53 is a translation guide rail, 54 is a translation guide rail.

Detailed Description

The following description of the embodiments of the present utility model will be made more complete and less obvious to those skilled in the art, based on the embodiments of the present utility model, for a part, but not all of the embodiments of the present utility model, without making any inventive effort.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 6, a wire cutting and peeling device comprises a working platform 1, and a wire cutting frame 3, a pushing guide rail 21, a pushing cylinder 22, a pressing guide rail 43 and a fixing frame 51 which are arranged on the working platform 1, wherein two first pneumatic fingers 31, a cutting cylinder 33 and a pressing block 32 are arranged on the wire cutting frame 3, the wire cutting frame 3 is used for placing wires, the two first pneumatic fingers 31 are arranged at intervals, the first pneumatic fingers 31 are used for clamping the wires together, the pressing block 32 and the cutting cylinder 33 are arranged up and down, the cutting cylinder 33 is arranged vertically, the cutting cylinder 33 is connected with a cutting knife 331 upwards, and the pressing block 32 and the cutting knife 331 are matched up and down to cut the wires together.

In this embodiment, the pushing rail 21 is horizontally disposed, the pushing rail 21 is slidably connected with a pushing seat 211, a second pneumatic finger 23 and two third pneumatic fingers 24 are disposed on the pushing seat 211, the second pneumatic finger 23 and the two third pneumatic fingers 24 are sequentially disposed at intervals, the second pneumatic finger 23 is used for clamping a plurality of wires in the wire, the third pneumatic finger 24 is used for clamping the wire, the pushing cylinder 22 is connected with the pushing seat 211 and is used for driving the pushing seat 211 to be close to the wire cutting frame 3 and driving the second pneumatic finger 23 to align with the fixing frame 51 or the pressing rail 43, the fixing frame 51 is provided with a fixing cylinder 52, and the fixing cylinder 52 is used for pressing a plurality of wires of the wire.

In this embodiment, a sliding rail 26 is disposed on the working platform 1, the sliding rail 26 is disposed in a horizontal direction, the sliding rail 26 is perpendicular to the pushing rail 21, a sliding seat 261 is slidably connected to the sliding rail 26, and the pushing rail 21 and the pushing cylinder 22 are disposed on the sliding seat 261.

In this embodiment, a servo motor 27 is disposed at the bottom of the working platform 1, the servo motor 27 is connected with a driving wheel 271, a driving screw 28 is rotatably connected to the bottom of the working platform 1, the driving screw 28 is in threaded connection with the sliding seat 261, a driven wheel 281 is coaxially connected to the driving screw 28, and the driving wheel 271 is connected to the driven wheel 281 through a driving belt 272.

In this embodiment, the first pneumatic finger 31 is connected with two first clamping jaws 311, the two first clamping jaws 311 are used for clamping wires together, the second pneumatic finger 23 is connected with two second clamping jaws 231, a plurality of first clamping grooves 232 are formed on opposite sides of the two second clamping jaws 231, the plurality of first clamping grooves 232 are arranged in parallel, each two vertically opposite first clamping grooves 232 are used for clamping one wire of the wires together, the third pneumatic finger 24 is connected with two third clamping jaws 241, and the two third clamping jaws 241 are used for clamping wires together.

In this embodiment, a translation guide rail 53 and a translation cylinder 54 are disposed on the working platform 1, the translation guide rail 53 is parallel to the sliding guide rail 26, the translation guide rail 53 is slidably connected with a fixing frame 51, the translation cylinder 54 is connected with the fixing frame 51, a plurality of vertical rods 511 are disposed on the fixing frame 51, top ends of the plurality of vertical rods 511 are commonly connected with a fixing plate 512, a fixing cylinder 52 is disposed on the fixing plate 512, the fixing cylinder 52 is downwardly connected with a fixing block 521, and the fixing block 521 is used for pressing an end portion of an electric wire of a wire rod onto the fixing frame 51.

In this embodiment, a fourth pneumatic finger 25 is disposed on the sliding seat 261, the fourth pneumatic finger 25 is aligned with the pressing guide rail 43, the fourth pneumatic finger 25 is located between the second pneumatic finger 23 and the third pneumatic finger 24, the fourth pneumatic finger 25 is connected with two fourth clamping jaws 251, a plurality of second clamping grooves 252 are formed on opposite sides of the two fourth clamping jaws 251, and the plurality of second clamping grooves 252 are arranged in parallel, and every two vertically opposite second clamping grooves 252 are used for jointly clamping one wire of the wire.

In this embodiment, a support 4 is disposed on the working platform 1, a feeding guide rail 41, a feeding cylinder 42, a pressing guide rail 43 and a pressing cylinder 44 are disposed on the support 4, the feeding guide rail 41 is used for conveying the terminals one by one, a discharge end of the feeding guide rail 41 is connected with the pressing guide rail 43, a pressing frame 431 is disposed on the pressing guide rail 43, and the feeding cylinder 42 is used for pushing the terminals to the pressing frame 431 one by one.

In this embodiment, the pressing guide rail 43 is provided with a first groove and a second groove penetrating through the pressing guide rail 43, a piston rod of the pressing cylinder 44 is hinged with a swinging rod 45, a middle part of the swinging rod 45 rotates to connect the bracket 4, an end part of the swinging rod 45 is hinged with a pressing block 46, a limiting block 461 and a pressing block 462 are respectively formed at the top of the pressing block 46, the limiting block 461 penetrates upwards out of the first groove to limit the movement of the terminal, and the pressing block 462 penetrates upwards out of the second groove to press the wire of the wire into the terminal.

In this embodiment, the specific terminal wire cutting and stripping assembly process is as follows: firstly, placing a wire to be cut on a wire cutting frame 3, enabling a plurality of wires of the wire to be positioned right above a compression block 32, starting two first pneumatic fingers 31, enabling the first pneumatic fingers 31 to drive two first clamping jaws 311 to be close to each other so as to clamp the wire together, starting a cutting cylinder 33, enabling a piston rod of the cutting cylinder 33 to extend upwards so as to push the cutting knife 331 to move upwards until the cutting knife 331 is matched with the compression block 32 to cut a shell of the wire in the wire;

after cutting, firstly starting a pushing cylinder 22, extending a piston rod of the pushing cylinder 22 to push a pushing seat 211 to move, enabling the pushing seat 211, a second pneumatic finger 23 and two third pneumatic fingers 24 to be close to a cutting frame 3, synchronously starting the second pneumatic finger 23 and the two third pneumatic fingers 24, enabling the second pneumatic finger 23 to drive the two second clamping jaws 231 to open, enabling the third pneumatic finger 24 to drive the two third clamping jaws 241 to open until a wire is positioned between the two third clamping jaws 241 and an electric wire of the wire is positioned between the two second clamping jaws 231, and then controlling the second pneumatic finger 23 and the two third pneumatic fingers 24 to enable the second clamping jaws 231 to close, enabling the first clamping groove 232 to clamp the electric wire of the wire and the third clamping jaw 241 to close and clamp the wire;

at this time, the pushing cylinder 22 is controlled to retract the piston rod of the pushing cylinder 22 so as to drive the pushing seat 211 to be far away from the wire cutting frame 3 until the second clamping jaw 231 is aligned with the fixed frame 51, then the servo motor 27 is started, the servo motor 27 drives the driving wheel 271 to rotate, the driving wheel 271 drives the driven wheel 281 to rotate through the driving belt 272 so as to drive the driving screw 28 to rotate, thereby driving the sliding seat 261 and the pushing seat 211 to translate, enabling the second pneumatic finger 23 to be gradually close to the fixed frame 51 until the wire end of the wire is pushed onto the fixed frame 51, then the fixed cylinder 52 is started, and the piston rod of the fixed cylinder 52 extends out so as to drive the fixed block 521 to move downwards, so that the wire end of the wire is pressed and fixed on the fixed frame 51;

at this time, the translation cylinder 54 and the servo motor 27 are synchronously controlled to drive the fixing frame 51 to move and drive the sliding seat 261 and the pushing seat 211 to move, so that the fixing frame 51 and the pushing seat 211 are far away from each other, and the wire shell in the cut wire rod is pulled out, wherein the wire shell is positioned on the fixing frame 51, then one terminal is input into the pressing guide rail 43 one by one through the feeding guide rail 41, after one terminal enters the pressing guide rail 43, the feeding cylinder 42 is started, the piston rod of the feeding cylinder 42 extends out to push the terminal to the pressing frame 43, and stops in the pressing frame 43 through the limiting block 461, the servo motor 27 and the pushing cylinder 22 are respectively controlled, the second clamping jaw 231 is aligned to the pressing frame 431 of the pressing guide rail 43, and the second clamping jaw 231 is gradually close to the pressing guide rail 43 until the wire with the shell removed is inserted into the terminal, finally the pressing cylinder 44 is started, the piston rod of the pressing cylinder 44 is retracted to drive the swinging rod 45 to swing, the pressing block 46 is moved upwards, and the limiting block 461 and the pressing block 462 is driven to press the wire into the terminal, and the wire is cut, and the wire is peeled and pressed.

The above-described embodiments are merely preferred embodiments of the present utility model, and are not intended to limit the present utility model in any way. Any person skilled in the art can make many more possible variations and modifications of the technical solution of the present utility model or modify equivalent embodiments without departing from the scope of the technical solution of the present utility model by using the technical content disclosed above. Therefore, all equivalent changes according to the inventive concept are covered by the protection scope of the utility model without departing from the technical scheme of the utility model.

Claims (8)

1. The utility model provides a cut-parts line peeling device, includes work platform (1) and sets up cut-parts line frame (3) on work platform (1), impels guide rail (21), impels cylinder (22), pressfitting guide rail (43), mount (51), its characterized in that: the wire cutting frame is characterized in that two first pneumatic fingers (31), a cutting cylinder (33) and a compression block (32) are arranged on the wire cutting frame (3), the wire cutting frame (3) is used for placing wires, the two first pneumatic fingers (31) are arranged at intervals, the first pneumatic fingers (31) are used for clamping the wires together, the compression block (32) and the cutting cylinder (33) are arranged up and down, the cutting cylinder (33) is vertically arranged, the cutting cylinder (33) is upwards connected with a cutting knife (331), and the compression block (32) and the cutting knife (331) are matched up and down to cut the wires together;

the wire cutting device is characterized in that the pushing guide rail (21) is arranged in the horizontal direction, the pushing guide rail (21) is connected with the pushing seat (211) in a sliding mode, a second pneumatic finger (23) and two third pneumatic fingers (24) are arranged on the pushing seat (211), the second pneumatic finger (23) and the two third pneumatic fingers (24) are sequentially arranged at intervals, the second pneumatic finger (23) is used for clamping a plurality of wires in a wire rod, the third pneumatic finger (24) is used for clamping the wire rod, the pushing cylinder (22) is connected with the pushing seat (211) and used for driving the pushing seat (211) to be close to the wire cutting frame (3) and driving the second pneumatic finger (23) to align to the fixing frame (51) or the pressing guide rail (43), and a fixing cylinder (52) is arranged on the fixing frame (51) and used for pressing the plurality of wires of the wire rod.

2. A wire cutting peeling apparatus as defined in claim 1, wherein: the automatic feeding device is characterized in that a sliding guide rail (26) is arranged on the working platform (1), the sliding guide rail (26) is arranged in the horizontal direction, the sliding guide rail (26) is perpendicular to the pushing guide rail (21), a sliding seat (261) is connected to the sliding guide rail (26) in a sliding mode, and the pushing guide rail (21) and a pushing cylinder (22) are arranged on the sliding seat (261).

3. A wire cutting peeling apparatus as defined in claim 2, wherein: the automatic feeding device is characterized in that a servo motor (27) is arranged at the bottom of the working platform (1), the servo motor (27) is connected with a driving wheel (271), a driving screw (28) is rotatably connected to the bottom of the working platform (1), the driving screw (28) is in threaded connection with a sliding seat (261), a driven wheel (281) is coaxially connected to the driving screw (28), and the driving wheel (271) is connected with the driven wheel (281) through a driving belt (272).

4. A wire-cutting peeling apparatus as defined in claim 3, wherein: the wire clamping device is characterized in that the first pneumatic finger (31) is connected with two first clamping jaws (311), the two first clamping jaws (311) are used for jointly clamping wires, the second pneumatic finger (23) is connected with two second clamping jaws (231), a plurality of first clamping grooves (232) are formed in opposite sides of the second clamping jaws (231), the first clamping grooves (232) are arranged in parallel, the first clamping grooves (232) which are opposite from top to bottom every two are used for jointly clamping one wire of the wires, and the third pneumatic finger (24) is connected with two third clamping jaws (241), and the two third clamping jaws (241) are used for jointly clamping the wires.

5. The wire-cutting peeling apparatus as defined in claim 4, wherein: be provided with translation guide rail (53), translation cylinder (54) on work platform (1), translation guide rail (53) are parallel with sliding guide rail (26), sliding connection mount (51) on translation guide rail (53), translation cylinder (54) connect mount (51), be provided with many montants (511) on mount (51), many montant (511) top is connected with fixed plate (512) jointly, be provided with fixed cylinder (52) on fixed plate (512), fixed cylinder (52) are connected with fixed block (521) downwards, fixed block (521) are used for compressing tightly the wire end of wire rod on mount (51).

6. A wire-cutting peeling apparatus as defined in claim 5, wherein: be provided with fourth pneumatic finger (25) on sliding seat (261), pressfitting guide rail (43) are aimed at to fourth pneumatic finger (25), fourth pneumatic finger (25) are located between second pneumatic finger (23) and third pneumatic finger (24), fourth pneumatic finger (25) are connected with two fourth clamping jaw (251), two open on the opposite side of fourth clamping jaw (251) have a plurality of second grip groove (252), a plurality of second grip groove (252) are arranged side by side, every two upper and lower opposite second grip groove (252) are used for a electric wire of centre gripping wire rod jointly.

7. The wire cutting and stripping device as defined in claim 6, wherein: be provided with support (4) on work platform (1), be provided with material loading guide rail (41), material loading cylinder (42), pressfitting guide rail (43), pressfitting cylinder (44) on support (4), material loading guide rail (41) are used for carrying the terminal one by one, pressfitting guide rail (43) are connected to the discharge end of material loading guide rail (41), be provided with pressfitting frame (431) on pressfitting guide rail (43), material loading cylinder (42) are used for pushing the terminal to pressfitting frame (431) department one by one.

8. A wire-cutting peeling apparatus as defined in claim 7, wherein: the utility model discloses a wire rod, including pressfitting guide rail (43), piston rod, connecting bracket (4) are rotated at the piston rod of pressfitting cylinder (44), connecting bracket (46) are articulated in piston rod, connecting bracket (45) middle part, connecting bracket (46) are articulated to piston rod (45) tip, stopper (461) and top briquetting (462) have been formed respectively at pressfitting piece (46) top, stopper (461) upwards wear out first recess and are used for restricting the terminal removal, top briquetting (462) upwards wear out the second recess and are used for pressing the electric wire of wire rod in the terminal.