CN203141398U - Electric wrench - Google Patents

Electric wrench Download PDF

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Publication number
CN203141398U
CN203141398U CN2013200931786U CN201320093178U CN203141398U CN 203141398 U CN203141398 U CN 203141398U CN 2013200931786 U CN2013200931786 U CN 2013200931786U CN 201320093178 U CN201320093178 U CN 201320093178U CN 203141398 U CN203141398 U CN 203141398U
Authority
CN
China
Prior art keywords
ratchet
gear
swing
electric wrench
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2013200931786U
Other languages
Chinese (zh)
Inventor
陈亮
周其伟
陈武
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Chervon Industry Co Ltd
Original Assignee
Nanjing Chervon Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201220745985 priority Critical
Priority to CN201210590614 priority
Priority to CN201220745985.7 priority
Priority to CN201210590614.0 priority
Application filed by Nanjing Chervon Industry Co Ltd filed Critical Nanjing Chervon Industry Co Ltd
Priority to CN2013200931786U priority patent/CN203141398U/en
Application granted granted Critical
Publication of CN203141398U publication Critical patent/CN203141398U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/46Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/463Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an externally toothed wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type

Abstract

The utility model discloses an electric wrench, comprising a casing, a power part, a ratchet mechanism, a support transmission component and an aperture gear, wherein a mounting part is formed at one end of the casing; the power part, the ratchet mechanism, the support transmission component and the aperture gear are sequentially connected and accommodated in the casing; a thread part penetrates through the mounting part to reach the aperture gear, the support transmission component is connected with the aperture gear and drives the aperture gear to rotate, so that the tightening or unscrewing of the thread part is realized. The electric wrench can be conveniently used for screwing a nut with a pipeline under the situations of overlength bolts or narrower operation space, the ratchet mechanism is used as a reversing transmission mechanism, a motor supplies power, in the use process, the thread part only needs to be placed in a sleeve of the aperture gear, and then the power jaw wrench is started, the tightening or unscrewing of the thread part can be realized under the situation that the casing is not needed to be rotated, the operation is simple and convenient, the working intensity is low, and the working efficiency is high.

Description

Electric wrench
Technical field
The utility model relates to a kind of electric tool, particularly a kind of electric wrench.
Background technology
Spanner has a wide range of applications in daily life, and it normally is used for tightening or unscrewing screw, nut.Spanner commonly used has two kinds of open-end wrench and ratchet spanneres.General open-end wrench can be put into screw element from the lateral opening of spanner, but it is tightening or is unscrewing in the operation, after being rotated a less corner, just spanner need be taken off from screw element screw element, and then spanner is changed angle be placed on the screw element to be rotated further, this process will be repeated repeatedly usually, tightened fully or unclamped until screw element, therefore operation inconvenience, and open-end wrench generally is not suitable for using in some narrow spaces.The nip part of ratchet spanner is generally enclosed construction, and therefore will realize tightening or unscrewing screw element needs ratchet spanner is entangled screw element from top or the bottom of screw element, uses inconvenience.Be the convenience of increasing work efficiency and using, occurred some electric wrenches on the market, yet the working head of these electric wrenches is generally enclosed construction, so only can under the short situation of bolt, use usually.In auto repair or house ornamentation industry, the long situation of a lot of bolts is arranged, existing electric wrench must cooperate long sleeve to use, and has reduced the convenience that uses like this.In addition, common electric wrench is more inconvenient with tubular object (for example water pipe, oil pipe) nut engaged the time, even can't use common electric wrench to carry out operation.
Summary of the invention
The utility model purpose is to provide a kind of and can uses and easy to operate electric wrench at narrow space.
For achieving the above object, the utility model provides a kind of electric wrench, being used for driving screw element rotates, it comprises housing, power part and ratchet mechanism, one end of described housing is formed with installation portion, described installation portion comprises two chelas that are oppositely arranged, be formed with jaw between two chelas, described electric wrench also comprises support transmission component and opening gear, described power part, ratchet mechanism, support transmission component and opening gear connect successively and are contained in the described housing, its split shed gear is arranged in the described installation portion and can rotates in installation portion, described opening gear comprises and supports the outer toothed portion that transmission component is meshed, the opening corresponding with described jaw and the drive division that communicates with opening, the width of described jaw and described opening is more than or equal to diameter or the width of the tubulose that cooperates with described screw element or column object, and drive division rotates for the annex that drives screw element or cooperate with screw element; The power that described power part provides is delivered to by ratchet mechanism and supports on the transmission component, and drives the rotation of opening gear by supporting transmission component.
Preferably, described housing is " one " font structure, it comprises the main casing that longitudinally extends and the support housing that is extended by main casing one end, one end of support housing is fixedly mounted in the main casing, the other end extends to the main casing outside along the shell length direction, installation portion is formed on described support housing away from an end of main casing, installation portion comprises two chelas that are oppositely arranged, two chelas are roughly curved, also be formed with an accommodation hole that communicates with described jaw between two chelas, the opening gear is installed in the accommodation hole.
Preferably, also be provided with reducing gear between described power part and the ratchet mechanism, the power that described power part provides passes to ratchet mechanism after slowing down by reducing gear.
Preferably, described reducing gear is planetary gear reducing mechanism or bevel gear reducer structure.
Preferably, described ratchet mechanism comprises eccentric shaft, swing component, ratchet and ratchet, and described eccentric shaft is articulated on the described support housing, and the output shaft of eccentric shaft and power part joins; Described ratchet is articulated on the described swing component, the inner ring of described ratchet is provided with the hook tooth with click-fit, the outer ring of described ratchet is provided with and supports the external toothing that transmission component matches, the pivot that ratchet can wind under the drive of swing component perpendicular to plane, described swing component place rotates along first direction or second direction, when described ratchet rotated along first direction, ratchet can insert hook tooth and rotate in the same way to promote ratchet; When described ratchet rotated along second direction, ratchet streaked at ratchet, and ratchet stops operating.
Preferably, described ratchet mechanism comprises eccentric shaft, swing component, ratchet and ratchet, and described eccentric shaft is articulated on the described support housing, and eccentric shaft joins by the output shaft of reducing gear and power part; Described ratchet is articulated on the described swing component, the inner ring of described ratchet is provided with the hook tooth with click-fit, the outer ring of described ratchet also is provided with and supports the external toothing that transmission component matches, the pivot that ratchet can wind under the drive of swing component perpendicular to plane, described swing component place rotates along first direction or second direction, when described ratchet rotated along first direction, ratchet just inserted hook tooth and rotates in the same way to promote ratchet; When described ratchet rotated along second direction, ratchet streaked at ratchet, and ratchet stops operating.
Preferably, described power part comprises motor and the power supply of powering to motor, described reducing gear is planetary gear reducing mechanism, it comprises planetary gear, ring gear, planet carrier and central gear, central gear is connected with the output shaft spline of motor, and planetary gear is meshed with central gear and ring gear respectively, and wherein ring gear is fixedly mounted on the support housing, planetary gear rotation under the drive of central gear, and along the output shaft revolution of ring gear around motor; The corresponding planet pin that is set with protrusion on the planet carrier, planetary gear is sleeved on the planet pin and can rotates relative to planet pin, and described planet carrier is connected with the eccentric shaft spline.
Preferably, described ratchet mechanism comprises commutator, described commutator includes rotating shaft, elastic parts reaches to dial and turns round, described swing component is articulated on the described support housing by rotating shaft, described elastic parts one end supports in rotating shaft, the other end and described ratchet offset, described ratchet comprises along the symmetrically arranged first ratchet portion of pivot and the second ratchet portion, described elastic parts rotates under rotating shaft drives, and offset with the first ratchet portion or the second ratchet portion, turn round spline for described group and be connected in the described rotating shaft, so that described group turned round and can drive rotating shaft and rotate to change elastic parts support the position on ratchet, thereby realize commutation function.
Preferably, described elastic parts comprises stage clip and hollow pins, and described rotating shaft is provided with putting hole, and wherein stage clip one end is connected to the inwall of hollow pins, and the other end is contained in the putting hole of rotating shaft, and described hollow pins offsets with ratchet under the effect of stage clip.
Preferably; described swing component comprises swing body and the over cap that cooperates with the swing body; described ratchet is installed between swing body and the over cap; be provided with shaft hole on swing body and the over cap; described ratchet arranges with shaft hole is concentric; all be provided with pilot hole on described swing body and the over cap relatively; be contained in the pilot hole described swing body and over cap is fixedly connected by screw; the shaft hole of described swing body and over cap is passed in described rotating shaft so that swing body and over cap can rotate by the phase countershaft, and described rotating shaft two end supports is on support housing and can rotate relative to support housing.
Preferably; at least one parts is equipped with round boss in the side near another parts in swing body and the over cap; wherein shaft hole is arranged on the center of round boss; described pilot hole is arranged on the round boss; also be provided with on the round boss for pivoting the pivot hole of ratchet is installed, pivot hole and pilot hole lay respectively at the circumferential both sides of round boss.
Preferably, described support transmission component comprises two drives, and two drives are symmetrically distributed centered by axis.Each drive both sides is meshing with each other with opening gear and changement respectively, and the opening size of opening gear is less than the maximum engagement distance between two drives and the opening gear.
Preferably, described drive division is the inner sleeve structure.
Preferably, described electric wrench also comprises Control Component, described Control Component comprises main switch, reset switch, switch drive part and circuit board, wherein main switch, reset switch are oppositely arranged on the both sides, grip part of housing, described switch drive part is arranged between main switch and the reset switch, and circuit board is provided with the control circuit that rotates for the control motor.
The utility model is by offering and the jaw corresponding opening at the opening gear, thereby screw element can be set in the opening gear by installation portion, tighten or unclamp action, thereby make electric wrench of the present utility model under the long situation of some bolts, or can both be convenient to use under the situation when twisting the nut of band pipeline etc.And with ratchet mechanism as the commutation transmission mechanism, and provide power by motor, in use, only screw element need be put into and start electric wrench of the present utility model in the opening gear then, under the situation that does not need roll-shell, can realize tightening or unscrewing of screw element, simple to operation, and also working strength is little, high efficiency also can conveniently be used in narrow operating space.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the electric wrench of the utility model embodiment;
Fig. 2 is the structural representation after the electric wrench of the utility model embodiment removes shell body and upper support frame;
Fig. 3 removes the structural representation behind the over cap of swing component for Fig. 2;
Fig. 4 is the three-dimensional exploded view of the electric wrench housing of the utility model embodiment;
Fig. 5 is the electric wrench motor of the utility model embodiment and the three-dimensional exploded view of reducing gear;
Fig. 6 is the three-dimensional exploded view of the electric wrench ratchet mechanism of the utility model embodiment;
Fig. 7 is the front view after the electric wrench of the utility model embodiment removes housing;
Fig. 8 is the electric wrench opening gear operation schematic diagram of the utility model embodiment;
Fig. 9 is that the electric wrench opening gear operation of the utility model embodiment is to the schematic diagram of other direction;
Figure 10 is the use view of the electric wrench of the utility model embodiment.
The specific embodiment
In order more to understand technology contents of the present utility model, especially exemplified by the specific embodiment and cooperate appended graphic being described as follows.
Please refer to Fig. 1 ~ 3, a kind of electric wrench 10 comprises housing 11, power part 13, reducing gear 14, ratchet mechanism 15, supports transmission component 17, opening gear 18 and Control Component 19.
Housing 11 is " one " font structure, and it comprises the main casing 110 that longitudinally extends and the support housing 111 that is extended by main casing 110 1 ends.Power part 13, reducing gear 14, ratchet mechanism 15, support transmission component 17 and opening gear 18 connect successively and are contained in the described housing 11.
Please also refer to Fig. 4, in the present embodiment, main casing 110 comprises first shell body 1101 and second shell body 1102, clamping mutually between first shell body 1101 and second shell body 1102, and it is fastening with screw, be formed with container cavity (figure is mark not) between first shell body 1101 and second shell body 1102, to hold an end of power part 13, reducing gear 14 and support housing 111.Also can adopt modes such as interference is connected, snapping, grafting, pin connection between first shell body 1101 and second shell body 1102, so long as first shell body 1101 and second shell body, 1102 connected modes fastening and easy accessibility all should be able to be belonged to protection domain of the present utility model.
One end of support housing 111 is formed with installation portion 1111, installation portion 1111 comprises two chelas that are oppositely arranged 1112, two chelas 1112 are roughly curved, be formed with an accommodation hole (figure is mark not) and a jaw that communicates with accommodation hole 1113 between two chelas 1112, accommodation hole is used for construction opening gear 18.One end of support housing 111 is fixedly mounted in the main casing 110, the other end extends to main casing 110 outsides along housing 11 length directions, the intensity of electric wrench 10 of the present utility model when guaranteeing manual operation, first end of support housing 111 extends to the grip part 112 of housing 11.In the present embodiment, support housing 111 comprises first bracing frame 1114 and second bracing frame 1115, the aluminum component that first bracing frame 1114 is formed in one or hot investment casting part, second bracing frame 1115 is the lid corresponding with first bracing frame, 1114 structures, first bracing frame 1114 and the 1115 mutual clampings of second bracing frame, make electric wrench 10 compact conformations of the present utility model and torsional strength height like this, thereby can be used for transfer larger torque.
In operating process, electric wrench 10 can by jaw 1113 overlap from the side install to object that screw element cooperates on, then screw element is installed to and tightens in the drive division or unclamp action, thereby make electric wrench 10 of the present utility model under the long situation of some bolts, or when twisting the nut of band pipeline, or can both be convenient to use under the situation such as the operating space is narrower.
Power part 13 is used for providing power to ratchet mechanism 15, the power supply 131 that it comprises motor 130 and power source is provided to motor 130.In embodiment, power supply 131 is battery, for example, and lithium battery or Ni-MH battery.Be appreciated that also and can in housing 11, power supply be set, and directly by the external power supply power supply, for example by ac power supply, at this moment, power part is alternating current generator.
Please refer to Fig. 5, the transmission of power that reducing gear 14 is used for power part 13 is provided is to ratchet mechanism 15, and its clutch end links to each other with ratchet mechanism 15.Reducing gear 14 is arranged between power part 13 and the ratchet mechanism 15 rotating speed for reducing motor 130, improves moment of torsion.
In order to make the structure of electric wrench 10 compacter, can transfer larger torque, and have higher transmission efficiency, in the present embodiment, reducing gear 14 is planetary gear reducing mechanism, and it comprises planetary gear 140, ring gear 141, planet carrier 142 and central gear 143.
Ring gear 141 is fixedly mounted in the housing 11, for keep transmission steadily, planetary gear 140 is more than one, and is evenly distributed in the ring gear 141 and with ring gear 141 and is meshed.In the present embodiment, planetary gear 140 is three, and central gear 143 is connected with the output shaft spline of motor 130, and planetary gear 140 is meshed with central gear 143, planetary gear 140 rotation under the drive of central gear 143, and along the output shaft revolution of ring gear 141 around motor 130.The corresponding planet pin 1420 that is set with three protrusions on the planet carrier 142, planetary gear 140 is sleeved on the planet pin 1420 and can rotates relative to planet pin 1420.Planet carrier 142 output shaft around motor 130 under the drive of planetary gear 140 rotates, and links to each other to give ratchet mechanism 15 with transmission of power with ratchet mechanism 15.Be appreciated that present embodiment is preferred version of the present utility model, reducing gear 14 is not limited to planetary gear reducing mechanism, also can be other reducing gears, for example bevel gear reducer structure.
Please refer to Fig. 2 and Fig. 6, ratchet mechanism 15 comprises eccentric shaft 150, swing component 151, ratchet 152 and ratchet 153.One end of eccentric shaft 150 is connected with planet carrier 142 splines, the other end of eccentric shaft 150 is provided with eccentric part (figure is mark not), and eccentric part and swing component 151 join that motor output shaft is converted into swing component 151 around the reciprocally swinging of its pivotal axis around rotatablely moving of axis.Swing component 151 is articulated on the support housing 111, and swing component 151 is provided with and the corresponding groove 1510 of the eccentric part of eccentric shaft 150, is set with the actuating sleeve 1501 that cooperates with groove 1510 on the eccentric part.Actuating sleeve 1501 is around the rotation of the central axis off-centre of eccentric shaft 150, and in the process of its eccentric rotary, actuating sleeve 1501 drives the reciprocally swinging of swing component 151 around the pivotal axis cycle.
Be appreciated that, because itself can playing, ratchet mechanism 15 slows down preferably and the effect that increases moment of torsion, therefore also can omit reducing gear 14, directly the output shaft by motor 130 links to each other with the eccentric shaft 150 of ratchet mechanism 15 or form and swing component 151 that the output shaft of motor 130 is designed to eccentric shaft is cooperatively interacted, and realizes the function of ratchet mechanism 15 transferring power.
Ratchet 152 is articulated on the swing component 151, ratchet 153 is provided with the hook tooth 1530 that cooperates with ratchet 152, the pivot axis that ratchet 152 can wind under the drive of swing component 151 perpendicular to plane, described swing component 151 place rotates along first direction or second direction, when described ratchet 152 rotated along first direction, ratchet 152 just inserted hook tooth 1530 and rotates in the same way to promote ratchet 153; When described ratchet 152 rotated along second direction, ratchet 152 streaked at ratchet 153, and ratchet 153 stops operating.
Please refer to Fig. 3, in order to make the structure of the utility model electric wrench 10 compacter, ratchet mechanism 15 is internal gearing structure, and hook tooth 1530 is arranged on ratchet 153 inner rings, and the outer ring of ratchet 153 also is provided with and supports the external toothing 1531 that transmission component 17 matches.
Please refer again to Fig. 6, change the rotation direction of ratchet 153 for convenience, ratchet mechanism 15 also comprises commutator 154, commutator 154 includes rotating shaft 1540, elastic parts 1541 and dials and turn round 1542, swing component 151 is articulated on the support housing 111 by rotating shaft 1540, elastic parts 1,541 one ends are fixedly connected in the rotating shaft 1540, the other end and ratchet 152 offset, ratchet 152 comprises the symmetrically arranged first ratchet portion 1520 and the second ratchet portion 1521, and elastic parts 1541 can offset with the first ratchet portion 1520 or the second ratchet portion 1521 under rotating shaft 1540 drives; When elastic parts 1541 and the first ratchet portion 1520 offset, when ratchet 152 rotates along first direction, the first ratchet portion 1520 just inserts hook tooth 1530 and rotates in the same way to promote ratchet 153, when ratchet 152 rotates along second direction, the first ratchet portion 1520 streaks at ratchet 153, and ratchet 153 stops operating; When elastic parts 1541 and the second ratchet portion 1521 offset, when ratchet 152 rotates along second direction, the second ratchet portion 1521 just inserts hook tooth 1530 and rotates in the same way to promote ratchet 153, when ratchet 152 rotates along first direction, the second ratchet portion 1521 streaks at ratchet 153, and ratchet 153 stops operating.Dial and to turn round 1542 splines and be connected in the rotating shaft 1540, turn round 1542 rotations that can drive rotating shaft 1540 by dialling, elastic parts 1541 is supported in the first ratchet portion 1520 or the second ratchet portion 1521, thereby realize commutation function.
Wherein, elastic parts 1541 comprises stage clip 1543 and hollow pins 1544, rotating shaft 1540 is provided with putting hole 1545, wherein stage clip 1,543 one ends are connected to the inwall of hollow pins 1544, the other end is contained in the putting hole 1545 of rotating shaft 1540, and hollow pins 1544 offsets with ratchet 152 under the effect of stage clip 1543.
For ease of installing and protection ratchet 153 and be positioned at the ratchet 152 of ratchet 153; swing component 151 comprises swing body 1511 and the over cap 1512 that can cooperate with swing body 1511; ratchet 153 rotating being installed between swing body 1511 and the over cap 1512; be provided with the shaft hole that wears for rotating shaft 1540 on swing body 1511 and the over cap 1512, ratchet 153 arranges with shaft hole is concentric.The shaft hole of swing body 1511 and over cap 1512 is passed in rotating shaft 1540 so that swing body 1511 and over cap 1512 can rotate by phase countershaft 1540, and rotating shaft 1540 two end supports are on support housing 111 and can rotate relative to support housing 111.
For the intensity and the convenient location that increase swing body 1511, the side near over cap 1512 on the swing body 1511 is provided with round boss 1513, ratchet 153 and round boss 1513 concentric settings.Shaft hole (figure is mark not) is arranged on the center of the round boss 1513 of swing body 1511.Equal corresponding pilot hole that is provided with on round boss 1513 and the over cap 1512, being contained in by the screw (not shown) can be fixedly connected with described swing body 1511 and over cap 1513 in the pilot hole.Also offer on the round boss 1513 for pivoting the pivot hole 1514 of ratchet 152 is installed, mutual in order to prevent ratchet 152 and rigging screw Diffraction, pivot hole 1514 and pilot hole lay respectively at the circumferential both sides of round boss 1513.Be appreciated that; also round boss 1513 can be arranged on the over cap 1512; perhaps equal corresponding round boss 1513 that is provided with on over cap 1512 and the swing body 1511; ratchet 153 rotating being sleeved on the round boss 1513 are so that the structure of electric wrench of the present utility model 10 is compacter.
Please refer again to Fig. 2 and Fig. 3, support transmission component 17 and be used for transmission of power with ratchet mechanism 15 to opening gear 18, support transmission component 17 and be meshing with each other with opening gear 18.
In the utility model, support transmission component 17 comprise two respectively with the drive 170 of external toothing 1531 engagements of opening gear 18 and ratchet 153.In order to make transmission more steady, structure is compacter, and two drives 170 are symmetrically distributed centered by the axis of motor output shaft.Be appreciated that in order to make transmission of power more stable, also can between two above-mentioned symmetrically arranged drives 170, increase some drives.Certainly; support transmission component 17 and also can or have the tubular structure of external gear for chain; as long as can be with the transmission of power of ratchet 153 to opening gear 18; and guarantee that opening gear 18 supports transmission component 17 and has part to be meshed with opening gear 18 all the time in rotation process, thereby the transmission component that drive opening gear 18 rotates stably all should belong to protection domain of the present utility model.
Please also refer to Fig. 1 and Fig. 7, opening gear 18 is meshed with supporting transmission component 17, and rotatable being installed in the installation portion 1111 of support housing 111.
Opening gear 18 comprises that the outer toothed portion 181 that is meshed with support transmission component 17, the opening 182 that enters from the side for screw element reach the drive division 183 that communicates with opening 182, drive division 183 is the inner sleeve structure, and its shape is corresponding with the head of the screw element of required driving.In order to guarantee the stability of transmission of power, the openings of sizes of opening gear 18 is less than the maximum engagement distance that supports between transmission component 17 and the opening gear 18.Be appreciated that, in order to be suitable for the screw element of different size, can be on drive division 183 the coupling (not shown), annex can be open sleeve or the converter that can cooperate with the screw element of different size, be connected on the opening gear 18 to the annex spline, annex links to each other by the Flexible Connector (not shown) with opening gear 18, and opening gear 18 drives annex by the power that supports transmission component 17 transmission and rotates to tighten or unscrew the screw element that is placed in the annex.
Please refer again to Fig. 7, Control Component 19 is used for the work of control electric wrench 10, and it comprises main switch 191, reset switch 192, switch drive part 193 and circuit board 194.For improving the comfortableness of operation, in the present embodiment, main switch 191, reset switch 192 are oppositely arranged on 112 both sides, grip part of housing 11, and switch drive part 193 is arranged between main switch 191 and the reset switch 192.Circuit board 194 is provided with the control circuit (not shown) of rotating for control motor 130, switch drive part 193 the driving of main switch 191 or reset switch 192 with under be switched on or switched off control circuit, main switch 192 is used for starting or stoping of control electric wrench 10, reset switch 193 is used for resetting of control opening gear 18, and the opening 182 of namely controlling opening gear 18 aligns with the jaw 1113 of housing 11.
Please also refer to Fig. 8 and Fig. 9, operation principle of the present utility model is: rotating with opening gear 18 first rotation directions is threaded together part direction.When wanting the threaded together part, the opening 182 that at first starts reset switch 192 adjustment opening gears 18 aligns with jaw 1113, the operator will pass jaw 1113 with treating tubulose or column object that the threaded together part cooperates, from opening 182 and enter into opening gear 18, and screw element is installed in the drive division 183 of opening gear 18, turn round 1542 elastic parts 1541 supported on first ratchet portion 1520 by rotate dialling this moment, start main switch 191 then, this moment, the output shaft of motor 130 drove eccentric shaft 150 eccentric rotary by reducing gear 14, the groove of offering on eccentric shaft 150 and the swing component 151 1511 periodically cooperates, thereby motor output shaft is converted into swing component 151 1540 periodic wobble around the shaft along the rotation of its axis, ratchet 152 is articulated on the swing component 151, ratchet 153 is provided with the hook tooth 1530 that cooperates with ratchet 152, the first ratchet portion 1520 winds under the drive of swing component 151 perpendicular to pivot first rotation direction on plane, described swing component 151 place or the rotation of second rotation direction, when described ratchet 152 rotated along first rotation direction, the first ratchet portion 1520 just inserted hook tooth 1530 and rotates in the same way to promote ratchet 153; When described ratchet 152 rotated along second rotation direction, the first ratchet portion 1520 streaked at ratchet 153, and ratchet 153 stops operating.Thereby make ratchet 153 periodically rotate along first rotation direction, rotate thereby drive opening gear 18 first rotation directions, thereby threaded together part.
In the time will unscrewing screw element, the opening 182 that at first starts reset switch 192 adjustment opening gears 18 aligns with jaw 1113, the operator will pass jaw 1113 with treating tubulose or column object that the threaded together part cooperates, from opening 182 and enter into opening gear 18, and screw element is installed in the drive division 183 of opening gear 18, turn round 1542 elastic parts 1541 supported on second ratchet portion 1521 by rotate dialling this moment, start main switch 191 then, this moment, the output shaft of motor 130 drove eccentric shaft 150 eccentric rotary by reducing gear 14, the groove of offering on eccentric shaft 150 and the swing component 151 1511 periodically cooperates, thereby motor output shaft is converted into swing component 151 1540 periodic wobble around the shaft along the rotation of its axis, ratchet 152 is articulated on the swing component 151, ratchet 153 is provided with the hook tooth 1530 that cooperates with ratchet 152, the second ratchet portion 1521 winds under the drive of swing component 151 perpendicular to pivot first rotation direction on plane, described swing component 151 place or the rotation of second rotation direction, when described ratchet 152 rotated along second rotation direction, the second ratchet portion 1521 just inserted hook tooth 1530 and rotates in the same way to promote ratchet 153; When described ratchet 152 rotated along first rotation direction, the second ratchet portion 1521 streaked at ratchet 153, and ratchet 153 stops operating.Make ratchet 153 periodically rotate along second rotation direction, rotate with second rotation direction thereby drive annex 102 by opening gear 101, realize unscrewing screw element.
Please refer again to Fig. 8 and Fig. 9, electric wrench 10 of the present utility model also has manual work pattern, and rotating with opening gear 18 first rotation directions is threaded together part direction.When wanting the threaded together part, the opening 182 that at first starts reset switch 192 adjustment opening gears 18 aligns with jaw 1113, the operator will pass jaw 1113 with treating tubulose or column object that the threaded together part cooperates, from opening 182 and enter into opening gear 18, and screw element is installed in the drive division 183 of opening gear 18, turn round 1542 elastic parts 1541 supported on first ratchet portion 1520 by rotate dialling this moment, when manually with the first rotation direction roll-shell 11, because the inside transmission mechanism of electric wrench 10 is not stuck mutually, therefore opening gear 18 can rotate with second rotation direction by relative housing 11, thereby driving ratchet 153 also rotates with second rotation direction, hook tooth 1530 was meshed to promote ratchet 152 with the first ratchet portion 1520 and rotated in the same way this moment, ratchet 152 drives swing component 151 and rotates along second rotation direction, swing component 151 also can be reverse drive eccentric shaft 150 rotate, when the eccentric part of eccentric shaft 150 to reverse drive dead point that groove 1511 matches the time, then eccentric shaft 150 is oppositely stuck mutually with swing component 151.Then can by opening gear 18 drive screw elements with first rotation direction rotate when continuing manually with the first rotation direction roll-shell 11 this moment, thus locking screw spare gradually.In like manner, use that also can be manual electric wrench 10 of the present utility model unscrews screw element.
Support housing 111 extends to the grip part 112 of electric wrench 10 from installation portion 1111, guaranteed the torsional strength when manually using electric wrench 10 of the present utility model, and ratchet mechanism 15 cut off the transmission of power between opening gear 18 and the motor output shaft, effectively avoided motor counter-rotating under the manual work pattern.
Please refer to Figure 10, the utility model is by offering at opening gear 18 and jaw 1113 corresponding opening 182, thereby screw element can be set in the opening gear 18 by installation portion 1111, tighten or unclamp action, thereby make electric wrench of the present utility model under the long situation of some bolts, or can both be convenient to use under the situation when twisting the nut of band pipeline etc.And with ratchet mechanism 15 as the commutation transmission mechanism, and provide power by motor 130, in use, only need screw element is put into opening gear 18, start electric wrench 10 of the present utility model then, under the situation that does not need roll-shell 11, can realize tightening or unscrewing of screw element, simple to operation, and working strength is little, and high efficiency also can conveniently be used in narrow operating space.
Though the utility model discloses as above with preferred embodiments, so it is not in order to limit the utility model.Have in the technical field under the utility model and know the knowledgeable usually, in not breaking away from spirit and scope of the present utility model, when being used for a variety of modifications and variations.Therefore, protection domain of the present utility model is as the criterion when looking claims person of defining.

Claims (14)

1. electric wrench, being used for driving screw element rotates, it comprises housing, power part and ratchet mechanism, it is characterized in that: an end of described housing is formed with installation portion, described installation portion comprises two chelas that are oppositely arranged, be formed with jaw between two chelas, described electric wrench also comprises support transmission component and opening gear, described power part, ratchet mechanism, support transmission component and opening gear connect successively and are contained in the described housing, its split shed gear is arranged in the described installation portion and can rotates in installation portion, described opening gear comprises and supports the outer toothed portion that transmission component is meshed, the opening corresponding with described jaw and the drive division that communicates with opening, the width of described jaw and described opening is more than or equal to diameter or the width of the tubulose that cooperates with described screw element or column object, and drive division rotates for the annex that drives screw element or cooperate with screw element; The power that described power part provides is delivered to by ratchet mechanism and supports on the transmission component, and drives the rotation of opening gear by supporting transmission component.
2. electric wrench according to claim 1, it is characterized in that: described housing is " one " font structure, it comprises the main casing that longitudinally extends and the support housing that is extended by main casing one end, one end of support housing is fixedly mounted in the main casing, the other end extends to the main casing outside along the shell length direction, installation portion is formed on described support housing away from an end of main casing, installation portion comprises two chelas that are oppositely arranged, two chelas are roughly curved, also be formed with an accommodation hole that communicates with described jaw between two chelas, the opening gear is installed in the accommodation hole.
3. electric wrench according to claim 1 is characterized in that: also be provided with reducing gear between described power part and the ratchet mechanism, the power that described power part provides passes to ratchet mechanism after slowing down by reducing gear.
4. electric wrench according to claim 3, it is characterized in that: described reducing gear is planetary gear reducing mechanism or bevel gear reducer structure.
5. electric wrench according to claim 1, it is characterized in that: described ratchet mechanism comprises eccentric shaft, swing component, ratchet and ratchet, and described eccentric shaft is articulated on the described support housing, and the output shaft of eccentric shaft and power part joins; Described ratchet is articulated on the described swing component, the inner ring of described ratchet is provided with the hook tooth with click-fit, the outer ring of described ratchet is provided with and supports the external toothing that transmission component matches, the pivot that ratchet can wind under the drive of swing component perpendicular to plane, described swing component place rotates along first direction or second direction, when described ratchet rotated along first direction, ratchet can insert hook tooth and rotate in the same way to promote ratchet; When described ratchet rotated along second direction, ratchet streaked at ratchet, and ratchet stops operating.
6. electric wrench according to claim 3, it is characterized in that: described ratchet mechanism comprises eccentric shaft, swing component, ratchet and ratchet, described eccentric shaft is articulated on the described support housing, and eccentric shaft joins by the output shaft of reducing gear and power part; Described ratchet is articulated on the described swing component, the inner ring of described ratchet is provided with the hook tooth with click-fit, the outer ring of described ratchet also is provided with and supports the external toothing that transmission component matches, the pivot that ratchet can wind under the drive of swing component perpendicular to plane, described swing component place rotates along first direction or second direction, when described ratchet rotated along first direction, ratchet just inserted hook tooth and rotates in the same way to promote ratchet; When described ratchet rotated along second direction, ratchet streaked at ratchet, and ratchet stops operating.
7. electric wrench according to claim 6, it is characterized in that: described power part comprises motor and the power supply of powering to motor, described reducing gear is planetary gear reducing mechanism, it comprises planetary gear, ring gear, planet carrier and central gear, central gear is connected with the output shaft spline of motor, planetary gear is meshed with central gear and ring gear respectively, wherein ring gear is fixedly mounted on the support housing, planetary gear rotation under the drive of central gear, and along the output shaft revolution of ring gear around motor; The corresponding planet pin that is set with protrusion on the planet carrier, planetary gear is sleeved on the planet pin and can rotates relative to planet pin, and described planet carrier is connected with the eccentric shaft spline.
8. according to claim 5 or 6 described electric wrenches, it is characterized in that: described ratchet mechanism comprises commutator, described commutator includes rotating shaft, elastic parts reaches to dial and turns round, described swing component is articulated on the described support housing by rotating shaft, described elastic parts one end supports in rotating shaft, the other end and described ratchet offset, described ratchet comprises along the symmetrically arranged first ratchet portion of pivot and the second ratchet portion, described elastic parts rotates under rotating shaft drives, and offset with the first ratchet portion or the second ratchet portion, turning round spline for described group is connected in the described rotating shaft, so that described group turned round and can drive rotating shaft and rotate to change elastic parts support the position on ratchet, thereby realize commutation function.
9. electric wrench according to claim 8, it is characterized in that: described elastic parts comprises stage clip and hollow pins, described rotating shaft is provided with putting hole, wherein stage clip one end is connected to the inwall of hollow pins, the other end is contained in the putting hole of rotating shaft, and described hollow pins offsets with ratchet under the effect of stage clip.
10. electric wrench according to claim 8; it is characterized in that: described swing component comprises swing body and the over cap that cooperates with the swing body; described ratchet is installed between swing body and the over cap; be provided with shaft hole on swing body and the over cap; described ratchet arranges with shaft hole is concentric; all be provided with pilot hole on described swing body and the over cap relatively; be contained in the pilot hole described swing body and over cap is fixedly connected by screw; the shaft hole of described swing body and over cap is passed in described rotating shaft so that swing body and over cap can rotate by the phase countershaft, and described rotating shaft two end supports is on support housing and can rotate relative to support housing.
11. electric wrench according to claim 10; it is characterized in that: at least one parts is equipped with round boss in the side near another parts in swing body and the over cap; wherein shaft hole is arranged on the center of round boss; described pilot hole is arranged on the round boss; also be provided with on the round boss for pivoting the pivot hole of ratchet is installed, pivot hole and pilot hole lay respectively at the circumferential both sides of round boss.
12. electric wrench according to claim 1, it is characterized in that: described support transmission component comprises two drives, two drives are symmetrically distributed centered by axis, each drive both sides is meshing with each other with opening gear and changement respectively, and the opening size of opening gear is less than the maximum engagement distance between two drives and the opening gear.
13. electric wrench according to claim 1 is characterized in that: described drive division is the inner sleeve structure.
14. electric wrench according to claim 1, it is characterized in that: described electric wrench also comprises Control Component, described Control Component comprises main switch, reset switch, switch drive part and circuit board, wherein main switch, reset switch are oppositely arranged on the both sides, grip part of housing, described switch drive part is arranged between main switch and the reset switch, and circuit board is provided with the control circuit that rotates for the control motor.
CN2013200931786U 2012-12-29 2013-02-28 Electric wrench Expired - Fee Related CN203141398U (en)

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CN201220745985 2012-12-29
CN201210590614 2012-12-29
CN201220745985.7 2012-12-29
CN201210590614.0 2012-12-29
CN2013200931786U CN203141398U (en) 2012-12-29 2013-02-28 Electric wrench

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103909491A (en) * 2012-12-29 2014-07-09 南京德朔实业有限公司 Electric wrench
CN103962997A (en) * 2014-04-03 2014-08-06 杭州佳联工具有限公司 Pneumatic ratchet wheel open spanner and operation method thereof
CN109968263A (en) * 2017-12-27 2019-07-05 乔治雷诺公司 Including the indexable method for tightening nut around pipe and corresponding device again
CN113400232A (en) * 2021-06-22 2021-09-17 江苏科技大学 Detection device for electromechanical equipment based on ship

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CN112959255A (en) * 2021-02-23 2021-06-15 王田田 Electric wrench

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US5584220A (en) * 1994-03-01 1996-12-17 Darrah; Scott A. Angle attachment tool
JPH11138457A (en) * 1997-11-10 1999-05-25 Honda Motor Co Ltd Nut fastening device
JP4246308B2 (en) * 1998-12-22 2009-04-02 前田金属工業株式会社 Nut tightening machine
CN101797733A (en) * 2010-02-03 2010-08-11 江苏爱康太阳能科技有限公司 Tool capable of automatically turning nut
DE202011102889U1 (en) * 2011-07-05 2011-08-19 Shu-Su Chan Fork ratchet wrench
CN103909491B (en) * 2012-12-29 2016-08-03 南京德朔实业有限公司 Electric wrench

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103909491A (en) * 2012-12-29 2014-07-09 南京德朔实业有限公司 Electric wrench
CN103909491B (en) * 2012-12-29 2016-08-03 南京德朔实业有限公司 Electric wrench
CN103962997A (en) * 2014-04-03 2014-08-06 杭州佳联工具有限公司 Pneumatic ratchet wheel open spanner and operation method thereof
CN109968263A (en) * 2017-12-27 2019-07-05 乔治雷诺公司 Including the indexable method for tightening nut around pipe and corresponding device again
CN113400232A (en) * 2021-06-22 2021-09-17 江苏科技大学 Detection device for electromechanical equipment based on ship

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CN103909491B (en) 2016-08-03

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