CN103192342B - Impact mechanism for electric tool - Google Patents
Impact mechanism for electric tool Download PDFInfo
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- CN103192342B CN103192342B CN201310148786.7A CN201310148786A CN103192342B CN 103192342 B CN103192342 B CN 103192342B CN 201310148786 A CN201310148786 A CN 201310148786A CN 103192342 B CN103192342 B CN 103192342B
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- transmission shaft
- power transmission
- rid
- block hitting
- impact mechanism
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 56
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000010079 rubber tapping Methods 0.000 abstract description 6
- 238000004146 energy storage Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 description 4
- 238000010009 beating Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013475 authorization Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001095 motoneuron effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to an impact mechanism for an electric tool. The impact mechanism comprises a driving wheel and a driving shaft, wherein one end of the driving shaft is connected with a driving mechanism in a driving manner. The impact mechanism is characterized in that the other end of the driving shaft, which passes through the driving wheel in a rotating manner, is rotatably connected with a power output part; a slapping block is arranged on the driving wheel; two check blocks are symmetrically arranged at the tail of the power output part and the head of the slapping block is positioned between the two check blocks; a containing groove used for containing steel balls is formed in the driving shaft; and a spring is also arranged between the head of the slapping block and the driving shaft. Compared with the prior art, the impact mechanism has the advantages that the torsional spring is used for energy storage, so that a working head of the electric tool can immediately work along with the starting of a motor without delay; and the problem that energy is wasted due to adoption of driving based on a friction force in the prior art is avoided; moreover, the impact mechanism is low in energy consumption, high in working efficiency and wide in application range, can be used for connection of common screws, and is especially suitable for being used for tightening self-tapping screws.
Description
Technical field
The present invention relates to electric hand tool, specifically refer to a kind of impact mechanism for electric tools.
Background technology
Electric wrench be a kind of with power supply or battery be power, instrument for tighting a bolt.In prior art, electric wrench generally includes the motor be connected with power supply, the transmission mechanism driven by motor, and described transmission mechanism transfers energy to and gets rid of in block hitting, to finish the work task by getting rid of the shock of block hitting to working head.The beater mechanism delivery efficiency of existing electric wrench reduces, and moment of torsion is little.
Authorization Notice No. is that the Chinese utility model patent of CN201881326U discloses " a kind of impact mechanism for electric tools ", it comprises and to be arranged in casing by motor-driven transmission mechanism, to get rid of block hitting and power output member, and described block hitting of getting rid of is driven by described transmission mechanism and drives the output shaft described in connection; It is characterized in that described transmission mechanism comprises drive, described motor drives the power transmission shaft connecting this drive, the perisporium of described drive is arranged with two grooves, and two pieces of afterbodys getting rid of block hitting respectively axle are located in two grooves; Two pieces of heads getting rid of block hitting connect power output member; Afterbody and the head interval of getting rid of block hitting described in described power transmission shaft corresponds to are provided with the first axis hole and the second axis hole, spring is equipped with in described first axis hole, conflicting respectively and get rid of the afterbody of block hitting at two pieces in the two ends of spring, is provided with and can makes two blocks of magnet getting rid of block hitting action simultaneously in described second axis hole.The electric wrench beater mechanism that this utility model provides is provided with two pieces and gets rid of block hitting, and utilize spring energy-storage, utilize magnet to make two pieces to get rid of block hitting to throw away simultaneously, larger power output can be obtained under less power of motor effect, and two pieces are got rid of block hitting and are symmetrical arranged, and the dynamic balancing in the course of work have also been obtained good guarantee.Be arranged at the clutch between drive and motor, make the work of beater mechanism more stable; With the engaged element of steel ball as clutch, advantage that long service life, cost are low and in the course of work temperature rise is low etc.But this beater mechanism starts owing to relying on frictional force to drive to get rid of block hitting, and energy consumption is high, and delayed certain relative to electric machine rotation of the action of output shaft; Simultaneously, because output shaft relies on the alternating action of spring and magnetic part to carry out work under the driving of motor, so the action of output shaft is intermittent, operating efficiency is not high, simultaneously because bringing a fatal problem, be exactly that this beater mechanism can only be used for screw to be assembled in existing screw, and to helpless from merit screw.
Summary of the invention
Technical problem to be solved by this invention provides a kind of applied widely and impact mechanism for electric tools that energy consumption is low, operating efficiency is high for the present situation of prior art.
The present invention solves the problems of the technologies described above adopted technical scheme: this impact mechanism for electric tools, comprise drive, the axis direction of described drive is provided with the first through axis hole, be provided with power transmission shaft in this first axis hole, one end of power transmission shaft connects the transmission mechanism of this electric tool and drives rotation by transmission mechanism; It is characterized in that: described drive axis is arranged in described first axis hole, and torsion spring set is located on described power transmission shaft, one end of torsion spring is fixedly connected on described power transmission shaft, and the other end of torsion spring is fixedly connected on described drive; Described drive is provided with groove, and the afterbody getting rid of block hitting is rotated by connecting axle and is arranged in described groove; Power output member is provided with the second axis hole, and the other end of described power transmission shaft is contained in described second axis hole, and has fit clearance between described power transmission shaft and described second axis hole; The afterbody of described power output member be interval with protrude towards described drive and symmetrically arranged two pieces of blocks, described in get rid of the head of block hitting between two pieces of blocks; Described power transmission shaft is provided with the storage tank for accommodating steel ball, be contained in the afterbody of power transmission shaft described in the steel ball subtend in storage tank, described in get rid of also to be provided with between the head of block hitting and described power transmission shaft make described in get rid of the elastic component that block hitting head opens relative to described power transmission shaft outward.
In such scheme, described block hitting of getting rid of can be designed as one, uses one and gets rid of the beating frequency that block hitting does not affect this beater mechanism, but the impulsive force be applied on working head can be slightly weak.Preferably, described groove has two, is symmetricly set on described drive; Accordingly, described in get rid of block hitting and have two, be separately positioned in two grooves.Use two to get rid of block hitting to be symmetrical arranged, impulsive force is stronger, and dynamic balancing is better.
Elastic component in such scheme can be stage clip or torsion spring.For stage clip, the two ends of stage clip are directly made to conflict on the position that the head and power transmission shaft that get rid of block hitting are corresponding; When using torsion spring, can be located on power transmission shaft by torsion spring set, the two ends of torsion spring are separately fixed at torsion spring and get rid of on the head position of block hitting.
Compared with prior art, the present invention utilizes torsion spring accumulation of energy, and therefore the working head of electric tool can work immediately with the startup of motor, not delayed; Avoid in prior art the problem of the energy consumption waste relying on frictional force transmission to bring, energy consumption is low, and operating efficiency is high, applied widely, not only may be used for the connection of plain screw, and is especially suitable for tightening of tapping screw simultaneously.In preferred version, two pieces of designs of getting rid of block hitting, make the job stability of this electric tool better, impulsive force is larger.Impact mechanism for electric tools provided by the present invention is particularly useful for tapping screw.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of embodiment of the present invention assembly structure;
Fig. 2 is the sectional view along A-A line in Fig. 1;
Fig. 3 is the sectional view along B-B line in Fig. 1;
Fig. 4 is the sectional view along C-C line in Fig. 1;
Fig. 5 is the longitudinal sectional view of drive in the embodiment of the present invention;
Fig. 6 is the sectional view along D-D line in Fig. 5;
Fig. 7 is the top view of Fig. 5;
Fig. 8 is the sectional view (when getting rid of block hitting disengaging block) along A-A line in Fig. 1;
The floor map of block hitting is got rid of in Fig. 9 embodiment of the present invention;
Figure 10 is the sectional view of embodiment of the present invention medium power output;
Figure 11 is the side view of Fig. 9.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Figures 1 to 10, this impact mechanism for electric tools comprises:
Power transmission shaft 1, the power output shaft be connected with the driving mechanism of electric tool.The driving mechanism of the electric tool in the present embodiment comprises the motor (not shown) be arranged in housing 6, and the output shaft connection for transmission mechanism 7 of motor, one end of power transmission shaft is fixedly connected with the output of transmission mechanism.Transmission mechanism 7 can select according to actual needs of the prior art any one.In order to ensure job stability and the service life of power transmission shaft, the power transmission shaft in the present embodiment is arranged on bearing 8.The other end of power transmission shaft connects power output member 3 through drive 2.The afterbody of power transmission shaft is arranged with in two storage tanks, 11, two storage tanks 11 and is equipped with steel ball 13 respectively; The head of power transmission shaft is arranged with two the first stopper slots 12.
Drive 2 is flying wheel, and the axis direction of drive is provided with the first through axis hole 21, and power transmission shaft 1 through the first axis hole 21, and has fit clearance between power transmission shaft 1 and the first axis hole 21, so that both relatively rotate.The sidewall of drive 2 is arranged with centered by the axis of drive on the first groove 22 sidewall relative with the second groove 23 with the second groove 23, first groove 22 and is respectively equipped with for being connected the connecting axle 24 that two pieces are got rid of block hitting 4.Two pieces are got rid of block hitting 4 and are contained in respectively in the first groove 22 and the second groove 23, and the afterbody getting rid of block hitting is rotatably connected on corresponding connecting axle 24.Connecting axle 24 is between storage tank 11 and the first stopper slot 12.Get rid of block hitting 4 and be provided with second stopper slot 41 corresponding with the first stopper slot 12.The two ends of spring 9 are contained in the first corresponding stopper slot 12 and the second stopper slot 41 respectively, thus two pieces of heads getting rid of block hitting are had all the time relative to the outer trend of opening of power transmission shaft 1.
Power output member 3, between the working head (not shown) being arranged on drive and electric tool, is delivered to the kinetic energy of beater mechanism on working head and carries out work.Power output member is arranged with two pieces of blocks 31 of protrusion towards the afterbody of drive 2, makes the end face of power output member afterbody forms groove structure.Two pieces of head captured of getting rid of block hitting are in this groove and between two pieces of blocks.The bottom surface of groove is provided with the second axis hole 32 for accommodating power transmission shaft head; The head rotation of power transmission shaft is arranged in the second axis hole 32.
Torsion spring 5, is the accumulation of energy part in the present embodiment, is set on power transmission shaft 1, one end of torsion spring is fixed on power transmission shaft 1, and the other end of torsion spring is fixed on drive 2.
The operation principle of this impact mechanism for electric tools is described for tapping screw.
When off position, two pieces of heads getting rid of block hitting are opened outward and two blocks of conflicting respectively under the action of the spring.
Motor obtains electric rotation, and drive power transmission shaft to rotate together by transmission mechanism, while drive axis, drive rotates with power transmission shaft under the effect of torsion spring, and two pieces are got rid of block hitting and also rotate together thereupon; Because the head getting rid of block hitting is conflicted two blocks, so power output member also rotates under getting rid of the drive of block hitting at two pieces together thereupon, namely power output member and motor in synchrony rotate, and the working head acted on screw turns screw.
Along with the rotation of screw, the resistance suffered by working head is increasing, is delivered to the resistance got rid of in block hitting and increases, thus the velocity of rotation of the drive getting rid of block hitting place is slowed down relative to power transmission shaft, torsion spring distortion accumulation of energy; Meanwhile, two steel balls in storage tank are squeezed evagination, outwards extrude from the afterbody getting rid of block hitting and get rid of block hitting, get rid of block hitting and rotate around connecting axle, get rid of the inside extrusion spring of head of block hitting, depart from the yoke (as shown in Figure 8) between block, under the effect of torsion spring, moment is racing fast, drives and gets rid of block hitting dynamic impact problem output shaft, the working head that power output shaft is driven impacts screw while rotary screw, forces tapping screw be screwed into workpiece.
After completing once impact, the head getting rid of block hitting resets under the action of the spring, and transposition is conflicted on two pieces of blocks, and the afterbody getting rid of block hitting then inwardly rotates, and two steel balls enter in respective storage tank, and the afterbody getting rid of block hitting resets.
Along with being rotated further of motor, this beater mechanism repeats above-mentioned action, is shot in workpiece by screw.
Power output member rotates half cycle and namely impacts once, and therefore the beating frequency of this impact mechanism for electric tools is high; And utilize torsion spring accumulation of energy in whole process, energy consumption is low; Avoid in prior art the problem that the energy consumption that relies on frictional force transmission to cause is high; And applied widely, not only may be used for the connection of plain screw, and be especially suitable for tightening of tapping screw.
Claims (3)
1. an impact mechanism for electric tools, comprises drive, and the axis direction of described drive is provided with the first through axis hole, is provided with power transmission shaft in this first axis hole, and one end of power transmission shaft connects the transmission mechanism of this electric tool and drives rotation by transmission mechanism; It is characterized in that: described drive axis is arranged in described first axis hole, and torsion spring set is located on described power transmission shaft, one end of torsion spring is fixedly connected on described power transmission shaft, and the other end of torsion spring is fixedly connected on described drive; Described drive is provided with groove, and the afterbody getting rid of block hitting is rotated by connecting axle and is arranged in described groove; Power output member is provided with the second axis hole, and the other end of described power transmission shaft is contained in described second axis hole, and has fit clearance between described power transmission shaft and described second axis hole; The afterbody of described power output member be interval with protrude towards described drive and symmetrically arranged two pieces of blocks, described in get rid of the head of block hitting between two pieces of blocks; Described power transmission shaft is provided with the storage tank for accommodating steel ball, be contained in the afterbody of power transmission shaft described in the steel ball subtend in storage tank, described in get rid of also to be provided with between the head of block hitting and described power transmission shaft make described in get rid of the elastic component that block hitting head opens relative to described power transmission shaft outward.
2. impact mechanism for electric tools according to claim 1, is characterized in that described groove has two, is symmetricly set on described drive; Accordingly, described in get rid of block hitting and have two, be separately positioned in two grooves.
3. impact mechanism for electric tools according to claim 1 and 2, is characterized in that described elastic component is stage clip or torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148786.7A CN103192342B (en) | 2013-04-25 | 2013-04-25 | Impact mechanism for electric tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148786.7A CN103192342B (en) | 2013-04-25 | 2013-04-25 | Impact mechanism for electric tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103192342A CN103192342A (en) | 2013-07-10 |
| CN103192342B true CN103192342B (en) | 2015-04-15 |
Family
ID=48715251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310148786.7A Expired - Fee Related CN103192342B (en) | 2013-04-25 | 2013-04-25 | Impact mechanism for electric tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103192342B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014212656A1 (en) * | 2014-06-30 | 2015-12-31 | Robert Bosch Gmbh | Test device for testing screw systems and test methods therefor |
| CN109065340B (en) * | 2018-08-22 | 2020-11-24 | 扬州鑫宝利金属制品有限公司 | Electric power vibration damping ring |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4811797A (en) * | 1987-10-21 | 1989-03-14 | Nauchno-Proizvodstvennoe Obiedinenie Po Mekhanizirovannomu Stroitelnomu Instrumentru I Otdelochnym Mashinam | Impact wrench |
| JP4457170B1 (en) * | 2009-06-03 | 2010-04-28 | 株式会社空研 | Impact wrench |
| CN201881326U (en) * | 2010-11-09 | 2011-06-29 | 徐雪峰 | Impact mechanism for electric tools |
| CN202517459U (en) * | 2012-01-18 | 2012-11-07 | 董旭 | Impact mechanism for electric tool |
| CN203236410U (en) * | 2013-04-25 | 2013-10-16 | 毛富蓉 | Impact mechanism for electric tool |
-
2013
- 2013-04-25 CN CN201310148786.7A patent/CN103192342B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103192342A (en) | 2013-07-10 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: NINGBO GEMAY INDUSTRY CO., LTD. Free format text: FORMER OWNER: MAO FURONG Effective date: 20140530 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Mao Furong Inventor after: Yuan Tanghua Inventor before: Mao Furong |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: MAO FURONG TO: MAO FURONG YUAN TANGHUA Free format text: CORRECT: ADDRESS; FROM: 315040 NINGBO, ZHEJIANG PROVINCE TO: 315800 NINGBO, ZHEJIANG PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20140530 Address after: 315800 room 5, building 22, 603 Henghe Road, Beilun District, Zhejiang, Ningbo Applicant after: NINGBO GEMAY INDUSTRY Co.,Ltd. Address before: 315040, 201, Lane 1, historian lane, Jiangdong District, Zhejiang, Ningbo Applicant before: Mao Furong |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 |