CN108747942A

CN108747942A - High stability electric screwdriver

Info

Publication number: CN108747942A
Application number: CN201810818477.9A
Authority: CN
Inventors: 龙军
Original assignee: Suzhou Multidimensional Intelligent Technology Co Ltd
Current assignee: Suzhou Multidimensional Intelligent Technology Co Ltd
Priority date: 2018-07-24
Filing date: 2018-07-24
Publication date: 2018-11-06

Abstract

The present invention provides a kind of high stability electric screwdrivers, including screwdriver bit and in tubular shell, the screwdriver bit is located at the distal end of the shell, motor is equipped in the shell, it is equipped with for realizing manual and automatic pattern switching compound output mechanism between the screwdriver bit and motor, a holder is fixed in the shell, the motor is fixed on the internal stent, the compound output mechanism is located at the distal end of the holder, the proximal end of the holder is provided with battery, it is further fixed on wiring board in the holder, the positive and negative polarities of the wiring board and the battery are electrically connected.The beneficial effects are mainly as follows：The first all installations of electrical equipment in shell can be positioned in this mechanism, then realize welding electrical connection, electric connection in this way is more simple and reliable, not will produce the hidden danger of electric leakage power-off by the setting of holder.

Description

High stability electric screwdriver

Technical field

The present invention relates to a kind of screwdriver, more particularly to it is a kind of for tighten and unscrew screw, nut and collection manually with from It moves in the screwdriver of one.

Background technology

Screwdriver is a kind of tool for twisting screw to force its in place, and usual screwdriver is divided into normal screws Batch, combined screwdriver and electric screwdriver, and electric screwdriver is typically all combined screwdriver.Electric screwdriver cares for name It is exactly to replace human hand to install and remove screw with electro-motor, and the small electric screwdriver of routine is in the case of no electric to think justice, It can not generally be used manually, manually in use, screwdriver output shaft is non-locking in activity.

In the prior art, it is directed to a kind of screwdriver of auto-manual, is limited using check valve, realizes auto-manual , the volume of check valve is big, and outer diameter is also larger so that the volume and outer diameter of screwdriver product are also larger, it has not been convenient to carry and deposit Storage.

Chinese patent CN 201410339537.0 improves the technology of auto-manual, uses a kind of compound output mechanism, The compound output mechanism includes mutually matched output shaft, supporting rack, bearing block and a plurality of pins.But the compound output mechanism There is a bigger problem, i.e., due to being to be slidably connected between its supporting rack and the shell, the two can produce if being in close contact Raw sliding friction, can lose bigger power, screwdriver usage time, which has been grown, also has noise.But if the two does not connect It touches, then supporting rack will produce certain shaking in the rotation, then：1, user experience is bad, and the feeling of hand tremor is serious；2, spiral shell The whole jitter time of silk batch is long, and the connection for motor and circuit is also to have bigger hidden danger；3, its single cylinder Shape shell is also to propose very high matching requirements for the assembling of internal mechanism.

Chinese patent CN 201410339624.6 also reveals a electric screw using same compound output mechanism Batch, same compound output mechanism has above-mentioned technical problem.Unlike, which adopts the battery flat shell of original screwdriver With the tubular shell combination motor casing of integral type using the structure of assembled shell, it is improved to using an installation inner casing, the installation Inner casing is made of the first mounting shell and the second mounting shell of mutual split, and decelerating motor, switch, electricity are equipped in the installation inner casing Pond and compound output mechanism, such structure type can reach efficiently technique effect easy to assembly, but this also brings along Some problems：1, due to artificial one installation inner casing of increase, cause its cost that can greatly increase；2, battery and other electricity consumptions member It is connected using conducting wire between part, in assembly needs that first conducting wire is welded, then be placed in again in the installation inner casing, meeting in this way Leading to the problem of one, that is, conducting wire arrangement is time-consuming and laborious when assembling, and will produce the problem of crimping causes assembly to have some setbacks in many cases, Either generating assembler firmly accidentally can be by conducting wire and battery contact or the assembly thing broken with the pad on electric device Therefore.Such case does not allow in assembly, and product fraction defective can be caused to greatly increase.

Invention content

It is an object of the invention to solve above-mentioned technical problem, a kind of high stability electric screwdriver is provided.

The present invention is achieved by the following technical solutions：

A kind of high stability electric screwdriver, including screwdriver bit and the shell in tubular, the screwdriver bit are located at described The distal end of shell, the shell is interior to be equipped with motor, is equipped with for realizing manual and automatic mold between the screwdriver bit and motor The compound output mechanism of formula switching, is fixed with a holder in the shell, the motor is fixed on the internal stent, described multiple The distal end that output mechanism is located at the holder is closed, the proximal end of the holder is provided with battery, circuit is further fixed in the holder The positive and negative polarities of plate, the wiring board and the battery are electrically connected.

Preferably, the holder includes a torus and symmetrically and proximally extend along the holder axis two Branch piece；Be provided with protrusion on the periphery of the torus, for the groove match tight fit in the shell so that the two It is mutually radially fixed；The distal end end face of the torus is matched with the protrusion in the shell, so that the two is mutually axially solid It is fixed.

Preferably, the proximal end of the torus of the holder is additionally provided with inside convex wall, and is arranged in the branch on piece Wedge block cooperates to the motor being axially fixed at the internal stent, the flat surface of the motor and institute together Stating the inner surface mutual cooperation of branch piece keeps the motor and the holder radially fixed.

Preferably, the wiring board is fixed on by screw on the holder, and one end is located at the proximal end of the motor.

Preferably, one end of the wiring board includes the positive and negative polarities contact of the battery, and wherein cathode contact passes through institute The bayonet for stating the proximal end of branch piece is directly contacted with battery, cathode contact with positioned at the battery proximal end conductive tube and or conduction Spring is electrically connected.

Preferably, setting is there are two through-hole on the shell, and there are two buttons to pass through described in the through-hole presses on respectively The both ends of the switch contact of wiring board, the button are respectively equipped with hangnail, for preventing the button from being dropped out from the through-hole.

Preferably, the compound output mechanism includes：

Bearing block, including a staged inner cavity, and fix on the bracket,

Output shaft, interts the inner cavity for being set to the bearing block and its distal end is concordant with the distal end of the bearing block, the output shaft Distal end with the interior hexagonal for receiving the screwdriver bit and its it is internal there is magnet, the proximal end of the output shaft is diameter More than the step of its distal end, the staged inner cavity of the step and the bearing block matches, and the peripheral surface of the step is by one Group curved surface is formed, and one group of curved surface is formed by connecting by spaced arcuate surface and inner concave,

And it is placed in the swivel mount between the bearing block and output shaft and a plurality of rollers, the swivel mount cooperation roller driving The output shaft realizes that the output shaft and bearing block are fixed to each other and realize the spiral shell by the automatic mode of screwdriver, the roller The manual mode of silk batch.

Preferably, the swivel mount includes backboard and vertically extending a plurality of adjutages, and the backboard is equipped with and institute The linkage axis hole that the arbor of motor is connected to each other is stated, so that the arbor of the swivel mount and motor is connected, the adjutage stretches into Between the proximal end and bearing block of the output shaft, the roller be axially set in the backboard and bearing block staged inner cavity it Between, it is circumferentially disposed between the output shaft and bearing block, and between adjacent adjutage.

Preferably, the bearing block is fixed on by convex shoulder on the holder.

Preferably, pad is additionally provided between the swivel mount and the holder, the pad is sleeved on the motor Motor shaft outside.

Preferably, it is provided with sealing ring between the bearing block and the output shaft.

The beneficial effects are mainly as follows：

1, the setting of holder, the electrical equipment in shell first can all be installed be positioned in this mechanism, then realize welding electricity Connection, in this way electric connection are more simple and reliable, not will produce the hidden danger of electric leakage power-off；

2, the setting of holder need not can also separately be set directly as the jig of welding；

3, the distal end of output shaft is concordant with the distal end of the bearing block, causes the length of fit of the two to greatly increase, improves biography Dynamic stability reduces hand tremor caused by the prior art and feels；

4, the cylindrical outer shape structure of output shaft, structure is more compact, and cost is lower；

5, the setting of pad can reduce the frictional force between swivel mount and holder, improve drive efficiency, reduce energy consumption；

The proximal end of bearing block and output shaft can be formed enclosure space, be placed in the sky by 6, the sealing ring setting on the outside of output shaft Interior lubricating oil can be such that the muting function of entire screwdriver greatly increases.

Description of the drawings

Fig. 1 is the exploded perspective view of the preferred embodiment of the present invention；

Fig. 2 is the front view of the preferred embodiment of the present invention；

Fig. 3 is the enlarged drawing of part A in Fig. 2；

Fig. 4 is the structural schematic diagram of holder of the present invention.

Specific implementation mode

It is understandable to enable above-mentioned purpose, feature and the advantageous effect of the present invention to become apparent, below in conjunction with the accompanying drawings to this The specific embodiment of invention is described in detail.

Present invention is disclosed a kind of high stability electric screwdrivers, and its height is mute, the concrete structure of preferred embodiment As shown in Figures 1 to 4, like the prior art, including screwdriver bit and the shell 1 in tubular, the screwdriver bit are located at The distal end of the shell 1." distal end " in the present invention, " proximal end " are the definition for user, distant from user One end is " distal end ", and one end closer from user is " proximal end ".Motor 2, the screwdriver bit are provided in the shell 1 It is equipped with for realizing manual and automatic pattern switching compound output mechanism between motor 2.

In the present invention, a holder 3 is fixed in the shell 1, the holder can be metal, can also be plastics system At, concrete structure as shown in figure 4, the holder 3 includes a torus 31 and symmetrically and along 3 axis of the holder proximally Two branch pieces 32 extended；It is provided with protrusion 33 on the periphery of the torus 31, is used for and 11 phase of groove in the shell 1 Tight fit is matched, so that the two is mutually radially fixed；The distal end end face 34 of the torus 31 and the raised phase in the shell 1 Cooperation, so that the two is mutually axially fixed.

The proximal end of the torus 31 of the holder 3 is additionally provided with inside convex wall 35（Shown in Fig. 3）, in the branch piece 32 It is provided with wedge block 36, the motor 2 is axially fixed inside the holder 3 by the two mutual cooperation, the motor of the motor 2 Axis is distally directed, and stretches out in the convex wall 35 and be formed by a circular hole.The motor 2 has flat surface 21, with institute Stating the inner surface mutual cooperation of branch piece 32 keeps the motor and the holder 3 radially fixed.In this way, when assembly motor 2 just very Simply, the motor 2 is fastened between the convex wall 35 of the holder 3 and wedge block 36.Because of the diameter of the branch piece 32 To extended structure, causes it with certain elasticity, be suitable for installation motor.Certainly, described if the shape of motor changes Branch piece 32 also only needs to change motor described in its shape adaptation.

The compound output mechanism is located at the distal end of the holder 3, and the proximal end of the holder 3 is provided with battery 4, the branch Wiring board 5 is further fixed in frame 3, which can be flexible circuit board, can also be common printed wiring board.It is described Wiring board 5 and the positive and negative polarities of the battery 4 are electrically connected.The battery 4 can be the lithium battery of dry cell or a bulk charging, nickel The common cells such as hydrogen battery.As shown in Fig. 2, the wiring board 5 is fixed on by screw 22 on the holder 3, and one end is located at The proximal end of the motor 2.One end of the wiring board 5 includes the positive and negative polarities contact of the battery 4, and wherein cathode contact passes through The bayonet 37 of the proximal end of the branch piece 32 is directly contacted with battery, cathode contact and the conductive tube 39 for being located at 4 proximal end of the battery With or power spring 38 be electrically connected.The power spring 38 is compressed by tail-hood 40.

The other end of the wiring board 5 includes a sheet metal conductor 52, and the sheet metal conductor 52 extends simultaneously to distal end It is electrically connected to a LED lamp panel 52, the LED lamp panel 52 is connected in the distal end of the shell 1 by LED lamp cover 53.

Setting is there are two through-hole 12 on the shell 1, and there are two buttons 13 to pass through described in the through-hole 12 presses on respectively The both ends of the switch contact 51 of wiring board 5, the button 13 are respectively equipped with hangnail 14, for preventing the button 13 from leading to from described Hole 12 drops out.In this way, the button 13 is mounted on the shell 1, the serious forgiveness of assembly is relatively high.

In conjunction with shown in Fig. 1 and Fig. 3, heretofore described compound output mechanism includes：It bearing block 6, output shaft 7 and sets Swivel mount 8 between the bearing block 6 and output shaft 7 and a plurality of rollers 9.

The bearing block 6 includes a staged inner cavity, and is fixed on the holder 3.The bearing block 6 passes through convex shoulder 61 It is fixed on the holder 3.

The output shaft 7 interts the inner cavity for being set to the bearing block 6 and its distal end is concordant with the distal end of the bearing block 6, The distal end of the output shaft 7 is with the interior hexagonal for receiving the screwdriver bit and its inside is with magnet 93, the output The proximal end of axis 7 is the step that diameter is more than its distal end, and the staged inner cavity of the step and the bearing block 6 matches, described The peripheral surface of step is formed by one group of curved surface, and one group of curved surface is formed by connecting by spaced arcuate surface and inner concave, institute The automatic mode that swivel mount 8 coordinates roller 9 that the output shaft 7 is driven to realize screwdriver is stated, the roller 9 is by the output shaft 7 It is fixed to each other with bearing block 6 and realizes the manual mode of the screwdriver.

Specifically, the swivel mount 8 includes backboard 81 and vertically extending a plurality of adjutages 82, set on the backboard 81 There is the linkage axis hole that the arbor with the motor 2 is connected to each other, so that the swivel mount 8 and the arbor of motor are connected, it is described to prolong Semi-girder 82 stretches between the proximal end of the output shaft and bearing block 6, and the roller 9 is axially set in the backboard 81 and bearing block It is circumferentially disposed between the output shaft 7 and bearing block 6 between 6 staged inner cavity, and between adjacent adjutage 82.

Similarly to the prior art, the swivel mount 8 coordinates roller 9 to drive institute for the switching of the automatically and manually pattern of the present invention The automatic mode that output shaft 7 realizes the electric precise screwdriver is stated, the roller 9 is mutual by the output shaft 7 and bearing block 6 The fixed manual mode for realizing the electric precise screwdriver.The peripheral surface of the step of the output shaft 7 is formed by one group of curved surface, One group of curved surface is formed by connecting by spaced arcuate surface and inner concave.In automatic mode, the roller 9 is right by the present invention The output shaft 7 generates the skew force of rotation direction, and under the automatic mode for making the present invention in this way, torque increases, and drive efficiency is big In the electric screwdriver of the prior art.The diameter of the roller 9 can select to be substantially equal between the inner concave and bearing block 6 Maximum distance, make in this way the present invention manual mode under, output shaft not will produce the idle stroke of rotation, and user experience is good. The switching of the manually and automatically pattern of the present invention is substantially similar with the prior art, and details are not described herein.

As shown in figures 1 and 3, pad 91, the pad are additionally provided between the swivel mount 8 and the holder 3 91 are sleeved on outside the motor shaft of the motor 2.The frictional force between holder and shell can be reduced in this way, improved drive efficiency, reduced Energy consumption.The cylindrical outer shape structure of output shaft 7 of the present invention, structure is more compact, and cost is lower.

Sealing ring 92 is provided between the bearing block 6 and the output shaft 7, it can be close with output shaft 7 by bearing block 6 End forms enclosure space, and lubricating oil can be placed in the space, the effect of pad 91 can be made to greatly enhance in this way, entirely The muting function of screwdriver greatly increases.

In order to make the muting function of screwdriver of the present invention more preferable, one layer of EVA can also be wrapped up on the periphery of the motor 2 Silencing cotton.The noise of motor itself can also substantially reduce in this way.This is helped for the worker for the environmental work that needs peace and quiet It is very big.

The beneficial effects are mainly as follows：The setting of holder first can all install the electrical equipment in shell It is positioned in this mechanism, then realizes welding electrical connection, electric connection in this way is more simple and reliable, not will produce electric leakage power-off Hidden danger；Holder need not can also separately be set directly as the jig of welding；The distal end of the output shaft 7 of the present invention and the bearing The distal end of seat 6 is concordant, and the length of fit of the two is caused to greatly increase, and improves the stability of transmission, reduces prior art institute band The hand tremor come is felt.

Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and it is perfect, therefore the present invention protection model It encloses to work as and is subject to what claims were defined.

Claims

1. a kind of high stability electric screwdriver, including screwdriver bit and the shell in tubular（1）, the screwdriver bit is located at The shell（1）Distal end, the shell（1）It is interior to be equipped with motor（2）, the screwdriver bit and motor（2）Between be equipped be used for Realize manual and automatic pattern switching compound output mechanism, it is characterised in that：The shell（1）Inside it is fixed with a holder（3）, The motor（2）It is fixed on the holder（3）Inside, the compound output mechanism are located at the holder（3）Distal end, the branch Frame（3）Proximal end be provided with battery（4）, the holder（3）Inside it is further fixed on wiring board（5）, the wiring board（5）With the electricity Pond（4）Positive and negative polarities be electrically connected.

2. high stability electric screwdriver as described in claim 1, which is characterized in that the holder（3）Including a torus （31）With symmetrically and along the holder（3）Two branch pieces that axis proximally extends（32）；The torus（31）It is outer Protrusion is provided on week（33）, it is used for and the shell（1）Interior groove（11）Match tight fit, so that the two is mutually radial It is fixed；The torus（31）Distal end end face（34）With the shell（1）Interior protrusion matches, so that the two is mutually axially It is fixed.

3. high stability electric screwdriver as claimed in claim 2, which is characterized in that the holder（3）Torus（31） Proximal end be additionally provided with inside convex wall（35）, with setting in the branch piece（32）On wedge block（36）, cooperate together By the motor（2）It is axially fixed at the holder（3）Inside, the motor（2）Flat surface（21）With the branch piece （32）Inner surface mutual cooperation make the motor and the holder（3）It is radially fixed.

4. high stability electric screwdriver as claimed in claim 3, which is characterized in that the wiring board（5）Pass through screw （22）It is fixed on the holder（3）On, and one end is located at the motor（2）Proximal end.

5. high stability electric screwdriver as claimed in claim 4, which is characterized in that the wiring board（5）One end include The battery（4）Positive and negative polarities contact, wherein cathode contact pass through the branch piece（32）Proximal end bayonet（37）Directly with Battery contact, cathode contact be located at the battery（4）The conductive tube of proximal end（39）With or power spring（38）It is electrically connected.

6. high stability electric screwdriver as claimed in claim 5, which is characterized in that the shell（1）There are two upper settings Through-hole（12）, there are two buttons respectively（13）Across the through-hole（12）Press on the wiring board（5）Switch contact（51）, The button（13）Both ends be respectively equipped with hangnail（14）, for preventing the button（13）From the through-hole（12）It drops out.

7. the high stability electric screwdriver as described in claim 1 to 6 is any, which is characterized in that the compound output mechanism Including bearing block（6）, including a staged inner cavity, the bearing block（6）Pass through convex shoulder（61）It is fixed on the holder（3）On, Output shaft（7）, intert and be set to the bearing block（6）Inner cavity and its distal end and the bearing block（6）Distal end it is concordant, it is described defeated Shaft（7）Distal end is with the interior hexagonal for receiving the screwdriver bit and it is internal with magnet（93）, the output shaft （7）Proximal end be step that diameter is more than its distal end, the step and the bearing block（6）Staged inner cavity match, institute The peripheral surface for stating step is formed by one group of curved surface, and one group of curved surface is formed by connecting by spaced arcuate surface and inner concave, And it is placed in the bearing block（6）And output shaft（7）Between swivel mount（8）With a plurality of rollers（9）, the swivel mount（8） Coordinate roller（9）Drive the output shaft（7）Realize the automatic mode of screwdriver, the roller（9）By the output shaft（7）With Bearing block（6）It is fixed to each other and realizes the manual mode of the screwdriver.

8. high stability electric screwdriver as claimed in claim 7, which is characterized in that the swivel mount（8）Including backboard （81）With vertically extending a plurality of adjutages（82）, the backboard（81）It is equipped with and the motor（2）Arbor be connected to each other Linkage axis hole so that the swivel mount（8）It is connected with the arbor of motor, the adjutage（82）Stretch into the output shaft Proximal end and bearing block（6）Between, the roller（9）It is axially set in the backboard（81）With bearing block（6）Staged inner cavity Between, it is circumferentially disposed in the output shaft（7）With bearing block（6）Between, and it is located at adjacent adjutage（82）Between.

9. high stability electric screwdriver as claimed in claim 7, which is characterized in that the swivel mount（8）With the holder （3）Between be additionally provided with pad（91）, the pad（91）It is sleeved on the motor（2）Motor shaft outside.

10. high stability electric screwdriver as claimed in claim 7, which is characterized in that the bearing block（6）With the output Axis（7）Between be provided with sealing ring（92）.