CN206689987U - A kind of jointing of electric wrench - Google Patents

Abstract

The utility model provides a kind of jointing of electric wrench, belongs to power tools technology field.It solves the technical problems such as the tool heads installation inconvenience of existing electric wrench.This jointing includes connecting shaft, is offered in connecting shaft by connecting hole of the end face along connecting shaft axially inwards, and connecting hole is interior to be provided with push rod and spring one, and the both ends of spring one are respectively acting on the bottom of push rod and connecting hole；The through hole being connected with connecting hole is offered in the side wall of connecting shaft, the spheroid that can be moved axially in through hole interior edge connecting shaft is provided with through hole, the diameter of spheroid is more than the wall thickness of connecting shaft through hole；Connection outer shaft sleeve is provided with adapter sleeve, and a part of relative resigning chamber with through hole is provided between the inwall of adapter sleeve and the outer peripheral face of connecting shaft；Spring two of the spheroid away from resigning chamber can be made by being additionally provided between adapter sleeve and connecting shaft.Jointing in the utility model is capable of the installation and removal of light implementation tool head.

Description

A kind of jointing of electric wrench

Technical field

The utility model belongs to power tools technology field, is related to a kind of electric wrench, particularly a kind of electric wrench Jointing.

Background technology

Electric wrench is exactly using power supply or battery as the spanner of power, is a kind of instrument for tightening high-strength bolt, is called High-strength bolt rifle.Impact wrench is broadly divided into, turns round and cuts spanner, constant torque wrench, corner spanner, angular spanner.Impact type at present Electric wrench makees motor using micromachine mostly, impacts the horizontal pin on output shaft by taping block, realizes the biography of torque Pass, so as to which inertia force caused by the taping block flywheel of rotation at a high speed is converted into the mesh that impulsive force reaches assembling-disassembling bolt or nut 's.The output shaft of electric wrench needs connecting tool head to be engaged with bolt or nut, in order to meet making for a variety of different occasions With；The output shaft of usual electric wrench is detachably connected with tool heads, is so convenient for changing tool heads.

China's patent (publication number：105773508A；Publication date：2016.07.20 a kind of electric wrench) is disclosed, including Casing, the motor in casing and the fixed chuck being connected outside casing and with motor output shaft, are connected with motor Power line, power cord ends are provided with plug, and fixed chuck is spring chuck, and fixed chuck lateral wall is provided with locating piece, fixed Screwdriver rod is removably fixed with chuck, one end of screwdriver rod is " one " font cutter head, and the other end is " ten " font cutter head, Fixed chuck outer wall is removably fixed with spanner set, and one end of spanner set is provided with nut neck, and the other end is provided with and fixed chuck The locating slot to match, positioning groove sidewall are provided with the neck to match with locating piece on fixed chuck.

Screwdriver rod is fixed in fixed chuck in above-mentioned patent document, whether installs or dismantle screw in the structure Knife bar, it is required for being unlocked manually, cumbersome, installation and removal screwdriver rod is not convenient enough.

The content of the invention

The utility model is directed to above mentioned problem existing for existing technology, there is provided a kind of jointing of electric wrench, this Utility model technical problem to be solved is：How convenience that in electric wrench tool heads mount and dismount is improved.

The purpose of this utility model can be realized by following technical proposal：

A kind of jointing of electric wrench, including connecting shaft, offer in the connecting shaft by end face along connecting shaft axle To inside connecting hole, it is characterised in that be provided with push rod and spring one in the connecting hole, the both ends of the spring one are made respectively Used in the bottom of the push rod and the connecting hole；The through hole being connected with connecting hole is offered in the side wall of the connecting shaft, The spheroid that can be moved axially in through hole interior edge connecting shaft is provided with the through hole, the diameter of the spheroid is more than the connecting shaft The wall thickness of through hole；The connection outer shaft sleeve is provided with adapter sleeve, the outer peripheral face of the inwall of the adapter sleeve and the connecting shaft it Between be provided with a part of relative resigning chamber with the through hole；The ball can be made by being additionally provided between the adapter sleeve and connecting shaft Spring two of the body away from resigning chamber.

Its operation principle is as follows：This jointing is used to connect shaft-like tool heads, has arc on the outer peripheral face of tool heads The stopper slot of shape；During original state, under the resilient force of spring two, spheroid is located in through hole and close to the hole of connecting hole Mouthful, spherical part is extend into connecting hole, during installation tool head, in tool heads insertion connecting hole, passes through instrument head end Portion is extruded spheroid, and spheroid overcomes the elastic force of spring two, is moved axially in through hole interior edge connecting shaft, and spheroid reaches through hole After extreme position, tool heads continue into, and the component that tool heads are applied on spheroid sphere causes spheroid to be moved along connection Axial and radial It is dynamic, resigning intracavitary is entered, spheroid is exited in connecting hole completely, and tool heads can overcome the elastic force of spring one to continue to connecting hole Bottom is moved, when the stopper slot in tool heads is relative with through hole, under the elastic acting force of spring two, and the spheroid edge connection diameter of axle Move, and be partially embedded into the stopper slot in tool heads into connecting hole to mobile, under the active force of spring one and push rod, Spheroid along connecting shaft moves one end distance axially outward with tool heads, and spheroid departs from resigning chamber, so as to be carried out to tool heads Firm axial limiting, implementation tool head are connected；When needing extracting tool head, connect along the pulling axially outward of connecting shaft Female connector, when resigning chamber is relative with spheroid, under the active force of spring one and push rod, spheroid moves radially along connecting shaft, enters To resigning intracavitary, spheroid exits the stopper slot of tool heads completely, and tool heads eject connection under the active force of spring one and push rod Hole, realization are conveniently dismantled.Jointing in the technical program is in connecting tool head, it is only necessary to is inserted into connection In hole, it just can easily realize and be connected；During extracting tool head, as soon as also only need adapter sleeve moving segment distance, can be easily The ejection of implementation tool head, installation and removal are all very convenient.

In the jointing of above-mentioned electric wrench, have on the outer peripheral face of the connecting shaft against platform, the company Head part on spheroid sphere can be resisted against by being provided between spindle and adapter sleeve, the both ends of the spring two be respectively acting on against On platform and head part.Spring two is acted on spheroid by head part, is had with spherical ball face and is preferably contacted, and ensures to promote spheroid Mobile reliability.

In the jointing of above-mentioned electric wrench, step groove one and step groove are offered on the inwall of the adapter sleeve Two, the step groove one is connected with step groove two and forms step surface, the depth of the step groove two on the inwall of adapter sleeve For degree more than the depth of the step groove one, the gap between the step groove two and the adapter sleeve and connecting shaft is collectively forming institute State resigning chamber.Step surface can play position-limiting action to head part, prevent it from coming off；Both step groove one and step groove two are with being connected The resigning space size formed between set is different, can realize that spherical part enters connecting hole and exits two kinds of connecting hole completely not Changed with being formed between state.

In the jointing of above-mentioned electric wrench, the through hole is more than described logical close to the aperture of connecting shaft outer peripheral face Hole is more than the through hole close to the aperture of connecting shaft inwall close to the diameter of the aperture of connecting shaft inwall and the spheroid.So both The normal function effect of spheroid is not influenceed, and activity space progress of the and can effectively to spheroid is spacing, prevents spheroid from shedding into company Connect hole or drop out connecting shaft.

In the jointing of above-mentioned electric wrench, limited block is fixedly provided with the connecting hole, is had on the push rod There is the limiting section to be leant with the limited block, the limiting section and spring one are located at the bottom of the limited block and the connecting hole Also there is the jacking portion that can be extend out between the limited block and the connecting hole aperture between portion, on the push rod.Pass through Push rod and spring one are carried out spacing, prevent both from coming off, at the same limited block the tool heads of insertion can also be carried out it is spacing, from And implementation tool head fast accurate is installed in place.

In the jointing of above-mentioned electric wrench, the quantity of the through hole have it is multiple and along connecting shaft it is circumferential uniformly between Every being equipped with a spheroid in distribution, each through hole；The step groove one and step groove two are annular groove, and the head part is in ring Shape, the head part and spring two are set in outside the connecting shaft.So pass through multiple not Tongfangs in tool heads circumferential direction Realize axially position in position so that be more uniformly stressed scattered, guarantee tool heads connection stability and reliability.

In the jointing of above-mentioned electric wrench, there is horizontal pin, the connecting hole on the outer peripheral face of the connecting shaft Cross section of inboard wall it is hexagonal.The shape of shape and connecting hole on tool heads outer peripheral face matches, and is in six sides by setting The circumference that shape is capable of implementation tool head is spacing；Impact block on electric wrench impacts above-mentioned horizontal pin so that connecting shaft rotates, and passes through Inertia force caused by rotation is converted into impulsive force and drives tool heads rotation at a high speed, so as to reach the purpose of assembling-disassembling bolt or nut.

Compared with prior art, the jointing in the utility model is in connecting tool head, it is only necessary to the company of being inserted into Connect in hole, just can easily realize and be connected；During extracting tool head, as soon as also only need adapter sleeve moving segment distance, can be light The ejection of the existing tool heads of pine nut, installation and removal are all very convenient.

Brief description of the drawings

Fig. 1 is the dimensional structure diagram of this jointing.

Fig. 2 is the cross section structure diagram of this jointing.

Fig. 3 is the partial enlargement structural representation at A in Fig. 2.

In figure, 1, connecting shaft；11st, connecting hole；12nd, through hole；13rd, against platform；14th, horizontal pin；2nd, push rod；21st, limiting section； 22nd, jacking portion；3rd, spring one；4th, spheroid；5th, adapter sleeve；51st, step groove one；52nd, step groove two；53rd, step surface；6th, step down Chamber；7th, spring two；8th, head part；9th, tool heads；91st, stopper slot；10th, limited block.

Embodiment

It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

As shown in Figure 1, Figure 2 and Figure 3, this jointing is used to connect shaft-like tool heads 9, on the outer peripheral face of tool heads 9 Stopper slot 91 with arc；The jointing of this electric wrench includes connecting shaft 1, has horizontal pin on the outer peripheral face of connecting shaft 1 14, the cross section of inboard wall of connecting hole 11 is hexagonal, and the shape and the shape of connecting hole 11 on the outer peripheral face of tool heads 9 match, Offered in connecting shaft 1 by connecting hole 11 of the end face along connecting shaft 1 axially inwards, connecting hole 11 is interior to be provided with push rod 2 and spring one 3, the both ends of spring 1 are respectively acting on the bottom of push rod 2 and connecting hole 11；Offered in the side wall of connecting shaft 1 and connecting hole 11 through holes 12 being connected, are provided with the spheroid 4 that can be moved axially in the interior edge connecting shaft 1 of through hole 12 in through hole 12, spheroid 4 it is straight Footpath is more than the wall thickness at the through hole 12 of connecting shaft 1；It is arranged with adapter sleeve 5 outside connecting shaft 1, the inwall of adapter sleeve 5 is outer with connecting shaft 1 A part of relative resigning chamber 6 with through hole 12 is provided between side face；Ball can be made by being additionally provided between adapter sleeve 5 and connecting shaft 1 Spring two 7 of the body 4 away from resigning chamber 6.During original state, under the resilient force of spring 27, spheroid 4 is located in through hole 12 And close to the aperture of connecting hole 11, the part of spheroid 4 is extend into connecting hole 11, and during installation tool first 9, tool heads 9 are inserted Enter in connecting hole 11, spheroid 4 is extruded by the end of tool heads 9, spheroid 4 overcomes the elastic force of spring 27, in through hole 12 Moved axially along connecting shaft 1, after spheroid 4 reaches the extreme position of through hole 12, tool heads 9 continue into, and tool heads 9 are applied to ball Component on the sphere of body 4 causes spheroid 4 to be moved radially along connecting shaft 1, enters in resigning chamber 6, and spheroid 4 exits connecting hole completely In 11, tool heads 9 can overcome the elastic force of spring 1 to continue to move to the bottom of connecting hole 11, when the stopper slot 91 in tool heads 9 When relative with through hole 12, under the elastic acting force of spring 27, spheroid 4 is moved radially along connecting shaft 1 and moved into connecting hole 11 It is dynamic, and in the stopper slot 91 being partially embedded into tool heads 9, under the active force of spring 1 and push rod 2, spheroid 4 is with instrument First 9 move one end distance axially outward along connecting shaft 1, and spheroid 4 departs from resigning chamber 6, so as to which tool heads 9 are carried out with firm axle To spacing, the axial direction of implementation tool first 9 is connected, by set hexagonal shape can implementation tool first 9 with being connected The circumference of the inwall of hole 11 is spacing, the horizontal pin 14 in impact block impact connecting shaft 1 on electric wrench so that connecting shaft 1 rotates, and leads to Inertia force caused by crossing high speed rotation is converted into impulsive force and drives tool heads 9 to rotate, so as to reach the mesh of assembling-disassembling bolt or nut 's；Need extracting tool it is first 9 when, along the adapter sleeve of pulling axially outward 5 of connecting shaft 1, when resigning chamber 6 is relative with spheroid 4, Under the active force of spring 1 and push rod 2, spheroid 4 moves radially along connecting shaft 1, enters in resigning chamber 6, and spheroid 4 exits completely The stopper slot 91 of tool heads 9, tool heads 9 eject connecting hole 11 under the active force of spring 1 and push rod 2, realized convenient and swift Dismounting.This jointing is in connecting tool head 9, it is only necessary to is inserted into connecting hole 11, just can easily realize that connection is solid It is fixed；Extracting tool it is first 9 when, as soon as also only need adapter sleeve 5 moving segment distance, can light implementation tool first 9 ejection, installation It is all very convenient with dismantling.

Further, as shown in Figures 2 and 3, have on the outer peripheral face of connecting shaft 1 against platform 13, connecting shaft 1 and connection The head part 8 that can be resisted against on the sphere of spheroid 4 is provided between set 5, the both ends of spring 27 are respectively acting on against platform 13 and top On part 8, spring 27 is acted on spheroid 4 by head part 8, is had with the sphere of spheroid 4 and is preferably contacted, and ensures to promote spheroid 4 to move Dynamic reliability；Step groove 1 and step groove 2 52, step groove 1 and step groove 2 52 are offered on the inwall of adapter sleeve 5 It is connected and step surface 53 is formed on the inwall of adapter sleeve 5, the depth of step groove 2 52 is more than the depth of step groove 1, platform Gap between rank groove 2 52 and adapter sleeve 5 and connecting shaft 1 is collectively forming resigning chamber 6, and step surface 53 can play limit to head part 8 Position effect, prevents it from coming off；The resigning space size that both step groove 1 and step groove 2 52 are formed between adapter sleeve 5 is not Together, it can realize that the part of spheroid 4 enters connecting hole 11 and exits formation conversion between 11 two kinds of different conditions of connecting hole completely.

As shown in Fig. 2 being fixedly provided with limited block 10 in connecting hole 11, there is the limit to be leant with limited block 10 on push rod 2 Position portion 21, limiting section 21 and spring 1 are located between limited block 10 and the bottom of connecting hole 11, and also having on push rod 2 to stretch Go out to the jacking portion 22 between limited block 10 and the aperture of connecting hole 11, it is spacing by being carried out to push rod 2 and spring 1, prevent two Person comes off, at the same limited block 10 tool heads 9 of insertion can also be carried out it is spacing, so as to first 9 fast accurate of implementation tool peace It is attached to position.

Through hole 12 is more than through hole 12 close to the hole of the inwall of connecting shaft 1 close to the aperture of the outer peripheral face of connecting shaft 1 in the present embodiment The diameter of footpath and spheroid 4 is more than through hole 12 close to the aperture of the inwall of connecting shaft 1.The normal function for so neither influenceing spheroid 4 is made With activity space progress of the and can effectively to spheroid 4 is spacing, prevents spheroid 4 from shedding into connecting hole 11 or drops out connecting shaft 1； The quantity of through hole 12 has multiple and is distributed along 1 circumferential uniform intervals of connecting shaft in the present embodiment, and one is equipped with each through hole 12 Individual spheroid 4；Step groove 1 and step groove 2 52 are annular groove, and head part 8 is annular in shape, head part 8 and the company of being set in of spring 27 Outside spindle 1, so by the circumferential direction of tool heads 9 multiple different azimuths realize axially position so that be more uniformly stressed It is scattered, ensure the connection stability and reliability of tool heads 9.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Although 1, connecting shaft has more been used herein；11st, connecting hole；12nd, through hole；13rd, against platform；14th, horizontal pin；2、 Push rod；21st, limiting section；22nd, jacking portion；3rd, spring one；4th, spheroid；5th, adapter sleeve；51st, step groove one；52nd, step groove two；53、 Step surface；6th, resigning chamber；7th, spring two；8th, head part；9th, tool heads；91st, stopper slot；10th, the term such as limited block, but be not precluded from Use the possibility of other terms.It is used for the purpose of more easily describing and explaining of the present utility model using these terms Matter；Any additional limitation is construed as all to disagree with the utility model spirit.

Claims (7)

1. a kind of jointing of electric wrench, including connecting shaft (1), offered on the connecting shaft (1) by end face along connecting The connecting hole (11) of axle (1) axially inwards, it is characterised in that push rod (2) and spring one (3) are provided with the connecting hole (11), The both ends of the spring one (3) are respectively acting on the bottom of the push rod (2) and the connecting hole (11)；The connecting shaft (1) Side wall on offer the through hole (12) being connected with connecting hole (11), being provided with the through hole (12) can be in through hole (12) The spheroid (4) moved axially along connecting shaft (1), the diameter of the spheroid (4) are more than the wall at the connecting shaft (1) through hole (12) place It is thick；Adapter sleeve (5), the inwall of the adapter sleeve (5) and the outer peripheral face of the connecting shaft (1) are arranged with outside the connecting shaft (1) Between be provided with a part of relative resigning chamber (6) with the through hole (12)；Between the adapter sleeve (5) and connecting shaft (1) also Provided with the spring two (7) that can make the remote resigning chamber (6) of the spheroid (4).

2. the jointing of electric wrench according to claim 1, it is characterised in that the outer peripheral face of the connecting shaft (1) Upper to have against platform (13), being provided between the connecting shaft (1) and adapter sleeve (5) can be resisted against on spheroid (4) sphere Head part (8), the both ends of the spring two (7) are respectively acting on against on platform (13) and head part (8).

3. the jointing of electric wrench according to claim 2, it is characterised in that on the inwall of the adapter sleeve (5) Step groove one (51) and step groove two (52) are offered, the step groove one (51) is connected and connected with step groove two (52) Covering and step surface (53) is formed on the inwall of (5), the depth of the step groove two (52) is more than the depth of the step groove one (51), Gap between the step groove two (52) and the adapter sleeve (5) and connecting shaft (1) is collectively forming the resigning chamber (6).

4. the jointing of the electric wrench according to claim 1 or 2 or 3, it is characterised in that the through hole (12) is close The aperture of connecting shaft (1) outer peripheral face be more than the through hole (12) close to connecting shaft (1) inwall aperture and the spheroid (4) it is straight Footpath is more than the through hole (12) close to the aperture of connecting shaft (1) inwall.

5. the jointing of the electric wrench according to claim 1 or 2 or 3, it is characterised in that in the connecting hole (11) Limited block (10) is fixedly provided with, there is the limiting section (21) to be leant with the limited block (10), the limit on the push rod (2) Position portion (21) and spring one (3) are located between the limited block (10) and the bottom of the connecting hole (11), on the push rod (2) Also there is the jacking portion (22) that can be extend out between the limited block (10) and the connecting hole (11) aperture.

6. the jointing of electric wrench according to claim 3, it is characterised in that the quantity of the through hole (12) has more It is individual and be distributed along the circumferential uniform intervals of connecting shaft (1), is equipped with a spheroid (4) in each through hole (12)；The step groove one (51) and step groove two (52) is annular groove, and annularly, the head part (8) and spring two (7) are set in the head part (8) The connecting shaft (1) is outside.

7. the jointing of the electric wrench according to claim 1 or 2 or 3, it is characterised in that the connecting shaft (1) There is horizontal pin (14), the cross section of inboard wall of the connecting hole (11) is hexagonal on outer peripheral face.