阅读说明：本技术 双锤式冲击扳手 (Double hammer impact wrench ) 是由 钟福祥 叶浩榕 于 2018-09-17 设计创作，主要内容包括：一种双锤式冲击扳手,适用于锁固螺丝,并包含马达、与所述马达连动的驱动单元,及锤击单元。所述锤击单元包括与所述驱动单元连接的锤轴、套设于所述锤轴的内环锤、套设于所述内环锤的外环锤、能与所述螺丝嵌合的输出锤,及多个滚珠。所述内环锤具有多个开口朝向所述外环锤的珠槽。所述内环锤随着所述锤轴转动并沿所述锤轴往复移动。所述外环锤具有多个对应于所述珠槽的导槽。每一个珠槽与对应的导槽之间各设置有滚珠。借由所述内环锤、所述外环锤及所述滚珠协同动作,产生提升动作流畅性且减少振动的效果。(A kind of double hammer impact wrench are suitable for locking screw, and include motor, the driving unit with motor gearing, and hammering unit.The hammering unit include with the hammer axis of driving unit connection, the inner ring hammer that is sheathed on the hammer axis, the outer ring hammer for being sheathed on inner ring hammer, can be chimeric with the screw output hammer into shape and multiple balls.The inner ring hammer has multiple pearl slots for being open and hammering into shape towards the outer ring.The inner ring hammer is rotated with the hammer axis and is moved back and forth along the hammer axis.The outer ring hammer has multiple guide grooves corresponding to the pearl slot.Ball is each provided between each pearl slot and corresponding guide groove.By inner ring hammer, outer ring hammer and the ball co-operating, generates enhancing action fluency and reduce the effect of vibration.)

1. a kind of double hammer impact wrench are suitable for locking screw, and include motor, driving unit, hammering unit and housing list Member, double hammer impact wrench are characterized in that:

The motor, the drive shaft including exportable power；

The driving unit is interlocked with the motor, and the gear set interlocked including the drive shaft by the motor；

The hammering unit is connected to the driving unit, and including extending along first axle and rotating around the first axle Hammer axis, annular in shape and the inner ring hammer, the annular in shape and outer ring that is sheathed on outside the inner ring hammer that are sheathed on outside the hammer axis Hammer, output hammer and multiple balls, the hammer axis have the driving end that connect with the gear set of the driving unit, and in contrast to The output end at the driving end, the pearl slot that the inner ring hammer has multiple recessed and opening to hammer into shape towards the outer ring, and it is more It is a towards the output end and around the hammering convex block that is separately arranged of hammer axis, the inner ring hammer rotates simultaneously with the hammer axis It is moved back and forth relative to the hammer axis along the first axle direction, the outer ring hammer has multiple is in around the first axle Recess and the guide groove for corresponding to the pearl slot, the guide groove are parallel to the first axle and extend, each pearl slot with it is corresponding Guide groove between be each provided with ball, the output hammer is set to the output end along the first axle, and has along described First axle extend and shape and the screw each other chimeric axis body and it is multiple be separately arranged around the axis body and with it is described Hammer the output convex block that convex block staggeredly engages；

The housing unit coats and supports the motor, the driving unit and the hammering unit, and including described in confession The opening that the axis body of output hammer is worn.

2. double hammer impact wrench according to claim 1, it is characterised in that: the gear set of the driving unit has more Planetary gear that a drive shaft with the motor engages, is connected to the planet tooth at the ring gear engaged with the planetary gear The bracket of the hammer axis of the hammering unit is taken turns and outputs power to, the ring gear is surrounded on outside the planetary gear and opposite Positioning is generated in the housing unit.

3. double hammer impact wrench according to claim 2, it is characterised in that: the hammering unit further includes being sheathed on institute The spring stating hammer axis and being connected between the bracket and inner ring hammer, the hammer axis is with surface, two by the surface Be recessed the V-arrangement ditch that is in the shape of the letter V, the inner ring hammer also tool there are two sliding ditch corresponding with the V-arrangement ditch, each V-arrangement ditch with Be provided with rolling member between corresponding sliding ditch, the rolling member is slided along corresponding V-arrangement ditch respectively so that inner ring hammer with The hammer axis rotation when can be moved back and forth relative to the hammer axis along the first axle direction.

4. double hammer impact wrench according to claim 1, it is characterised in that: the pearl slot of the hammering unit is around institute First axle is stated annularly to arrange.

5. double hammer impact wrench according to claim 4, it is characterised in that: it is described hammering unit the pearl slot be also in Angularly separately.

6. double hammer impact wrench according to claim 1, it is characterised in that: the hammering unit further includes the first pad Piece and the second gasket, outer ring hammer also have a first end corresponding to the output end, and in contrast to the of the first end Two ends, first gasket are annularly sheathed on the axis body outside of the output hammer and are resisted against the first end, and described second Gasket be annularly sheathed on outside the hammer axis and be resisted against the second end, first gasket and the second gasket also relative to The housing unit generates positioning so that outer ring hammer can only be rotated around the first axle and can not be along the first axle Direction is mobile.

7. double hammer impact wrench according to claim 1, it is characterised in that: the hammering unit further includes the second pad Piece and roller bearing, outer ring hammer also have corresponding to the output end and directly against the head of the housing unit, And the hammer body portion extended by the head towards the driving end, the roller bearing have stop collar and multiple rollers, the limit Position ring set is set to outside the hammer body portion and side is resisted against the head, and the roller is limited in the stop collar and can edge The stop collar rolls, and second gasket is annularly sheathed on outside the hammer body portion and is resisted against the stop collar far from described The other side on head, second gasket generate positioning also relative to the housing unit, so that outer ring hammer can only be around institute It states first axle rotation and can not be moved along the first axle direction.

Technical field

The present invention relates to a kind of hand-held tools, more particularly to a kind of double hammer impact wrench.

Background technique

Previous impact wrench be suitable for locking one screw, and have single jump bit, the jump bit by driving and It is moved back and forth along an axis and is rotated around the axis and hammer and hammered into shape in a output that can be chimeric with the screw.Work as aforementioned impact When spanner needs biggish impact power, it is considered as increasing the quality of the jump bit in design level to promote rotary inertia, but The shortcomings that being designed in this way is that the vibration generated by hammering is also larger, causes the maneuverability and degree of comfort decreased of use aspect. Therefore a kind of existing double hammer impact wrench as disclosed in No. 107175610 patent of People's Republic of China's publication No., With a main ram and a secondary hammer.The main ram is moved back and forth along an axis and is rotated around the axis, which hammers into shape with the main ram Rotation along the axis without moving.The design of this double hammers can effectively increase rotation compared to single hammer design above-mentioned and be used to Amount, and reduce the vibration that hammering generates.And between the main ram of existing double hammer impact wrench and secondary hammer, it is with multiple needle-shaped Roller is embedded in corresponding groove and interlocks.Needle dress roller needs an elastic component to assist positioning, and may be because of The positional shift of the needle rollers, the needle rollers are swung, the machining accuracy of the groove is insufficient, the needle rollers with The excessively high factor of frictional force between groove causes movement not smooth, and therefore causes additional vibration.

Summary of the invention

The purpose of the present invention is to provide a kind of enhancing action fluency and reduce double hammer impact wrench of vibration.

Double hammer impact wrench of the invention, are suitable for locking screw, and include motor, driving unit, hammering unit, and cover Shell unit.The motor includes the drive shaft of exportable power.The driving unit and the motor interlock, and including by described The gear set that the drive shaft of motor interlocks.

The hammering unit is connected to the driving unit, and including extending along first axle and turning around the first axle Dynamic hammer axis, it is annular in shape and be sheathed on outside the hammer axis inner ring hammer, it is annular in shape and be sheathed on the inner ring hammer it is external outside Ring hammer, output hammer and multiple balls.

The hammer axis has the driving end connecting with the gear set of the driving unit, and defeated in contrast to the driving end Outlet.Pearl slot that the inner ring hammer has multiple recessed and opening to hammer into shape towards the outer ring and multiple towards the output End and the hammering convex block being separately arranged around the hammer axis.The inner ring hammer rotates and with the hammer axis relative to the hammer axis It is moved back and forth along the first axle direction.The outer ring hammer has multiple recessed around the first axle and corresponds to The guide groove of the pearl slot.The guide groove is parallel to the first axle and extends.It is respectively set between each pearl slot and corresponding guide groove It is equipped with ball.Output hammer is set to the output end along the first axle, and have extend along the first axle and Shape and the screw chimeric axis body and multiple are separately arranged around the axis body and staggeredly connect with the hammering convex block each other The output convex block of conjunction

The housing unit coats and supports the motor, the driving unit and the hammering unit, and including for institute State the opening that the axis body of output hammer is worn

There are multiple drive shafts with the motor to nibble for double hammer impact wrench of the invention, the gear set of the driving unit The planetary gear of conjunction, the ring gear engaged with the planetary gear are connected to the planetary gear and output power to the hammer The bracket of the hammer axis of unit is hit, the ring gear, which is surrounded on outside the planetary gear and generates relative to the housing unit, to be determined Position.

Double hammer impact wrench of the invention, the hammering unit further includes being sheathed on the hammer axis and being connected to the bracket With the spring between inner ring hammer, the hammer axis has surface, two V-arrangement ditch being in the shape of the letter V by the surface indentation, described There are two sliding ditches corresponding with the V-arrangement ditch for inner ring hammer also tool, are provided with rolling between each V-arrangement ditch and corresponding sliding ditch Moving part, the rolling member are slided along corresponding V-arrangement ditch respectively, enable inner ring hammer with when hammer axis rotation relative to The hammer axis is moved back and forth along the first axle direction.

The pearl slot of double hammer impact wrench of the invention, the hammering unit is annularly arranged around the first axle.

Hammer impact wrench of the invention double, the pearl slot of the hammering unit are also in angularly separately.

Double hammer impact wrench of the invention, the hammering unit further include the first gasket and the second gasket, the outer ring hammer Also there is the first end corresponding to the output end, and in contrast to the second end of the first end, first gasket is annular in shape It is sheathed on outside the axis body of the output hammer and is resisted against the first end, second gasket is annularly sheathed on the hammer axis Outside is simultaneously resisted against the second end, first gasket and the second gasket also relative to housing unit generation positioning, makes Obtaining the outer ring hammer can only rotate around the first axle and can not move along the first axle direction.

Double hammer impact wrench of the invention, the hammering unit further include the second gasket and roller bearing, the outer ring hammer Also have corresponding to the output end and directly against the head of the housing unit, and by the head towards the driving end The hammer body portion of extension, the roller bearing have stop collar and multiple rollers, the stop collar be sheathed on outside the hammer body portion and Side is resisted against the head, and the roller is limited in the stop collar and can roll along the stop collar, described second Gasket is annularly sheathed on outside the hammer body portion and is resisted against the other side of the stop collar far from the head, second pad Piece also relative to the housing unit generate positioning so that the outer ring hammer can only around the first axle rotate and can not be along institute It is mobile to state first axle direction.

The beneficial effects of the present invention are: by inner ring hammer, outer ring hammer and the ball co-operating, generate Enhancing action fluency and the effect for reducing vibration simultaneously.

Detailed description of the invention

Fig. 1 is a perspective view of a first embodiment of double hammer impact wrench of the invention；

Fig. 2 is a sectional perspective exploded view of the first embodiment；

Fig. 3 is an incomplete sectional perspective exploded view of the first embodiment；

Fig. 4 is an incomplete side sectional view of the first embodiment；

Fig. 5 is a cross-sectional view of the line V-V in Fig. 4；

Fig. 6 is that an incomplete sectional perspective of a second embodiment of double hammer impact wrench of the invention is decomposed Figure；

Fig. 7 is an incomplete side sectional view of the second embodiment.

Specific embodiment

The following describes the present invention in detail with reference to the accompanying drawings and embodiments.

Refering to fig. 1 to Fig. 5, a first embodiment of the double hammer impact wrench of the present invention is suitable for one screw of locking, It and include 1, one, motor driving unit 2, one hammering unit 3 and a housing unit 4.The motor 1 can including one The drive shaft 11 of output power.

The driving unit 2 and the motor 1 interlock, and the gear set 21 that the drive shaft 11 including one by the motor 1 interlocks. The gear set 21 has multiple planetary gears engaged with the drive shaft 11 of the motor 1 211, one and the planetary gear 211 Ring gear 212, one of engagement are connected to the planetary gear 211 and output power to the bracket 213 of the hammering unit 3, should Ring gear 212 is surrounded on 211 outside of planetary gear and generates positioning relative to the housing unit 4.

The hammering unit 3 is connected to the driving unit 2, and including one extend along a first axle L1 and around this first 31, one, the hammer axis inner ring that are annular in shape and being sheathed on outside the hammer axis 31 that axis L1 is rotated are hammered 32, one into shape annularly and are arranged 34, outer ring hammer 33, multiple balls outputs outside inner ring hammer 32 hammer 35, one into shape and are sheathed on the hammer axis 31 and are connected to 36, first gaskets 37 of spring and second gasket 38 between the bracket 213 and inner ring hammer 32.

The hammer axis 31 has 311, one, a driving end connecting with the bracket 213 of the driving unit 2 in contrast to the drive The V-arrangement ditch 314 and two rollings that 313, two, the surface of output end 312, one of moved end 311 is in the shape of the letter V by the surface 313 recess Moving part 315.Inner ring hammer 32 has multiple pearl slots 321, multiple hammering convex blocks 322 and two corresponding with the V-arrangement ditch 314 Slide ditch 323.The pearl slot 321 is in concave arc shape and is open towards outer ring hammer 33.The pearl slot 321 is in around first axle L1 Annular arrangement and in angularly separately.The hammering convex block 322 is separately set towards the output end 312 and around the hammer axis 31 It sets.A rolling member 315 is provided between each V-arrangement ditch 314 and corresponding sliding ditch 323.In the present first embodiment, institute Pearl slot 321 is stated around first axle L1 in angularly separately generating the effect of uniform stressed, but is not limited thereto.

Outer ring hammer 33 is right with multiple guide groove 331, one for surrounding first axle L1 and corresponding to the pearl slot 321 It should be in the first end 332 of the output end 312 and a second end 333 in contrast to the first end 332.The guide groove 331 is parallel In concave arc shape and first axle L1 extension is parallel in the section of first axle L1.Each pearl slot 321 is led with corresponding A ball 34 is each provided between slot 331.Output hammer 35 is set to the output end 312 along first axle L1, and has One extend along first axle L1 and shape and the screw each other chimeric axis body 351 and it is multiple around the axis body 351 separately The output convex block 352 for being arranged and staggeredly being engaged with the hammering convex block 322.First gasket 37 is annularly sheathed on output hammer 35 outside of axis body 351 is simultaneously resisted against the first end 332, second gasket 38 be annularly sheathed on 31 outside of hammer axis and against In the second end 333, first gasket 37 and the second gasket 38 are generated also relative to the housing unit 4 and are positioned.It is real originally first It applies in example, the number of the pearl slot 321, the guide groove 331 and the ball 34 is all eight, but only for for example, and Number without being limited thereto.In addition, it is described hammering convex block 322 and it is described output convex block 352 number be all two, but only for citing and Speech, however it is not limited to this number.

The housing unit 4 coats and supports the motor 1, the driving unit 2 and the hammering unit 3, and including one for being somebody's turn to do The opening 41 that the axis body 351 of output hammer 35 is worn.

When the motor 1 starts, which interlocks the planetary gear 211.The planetary gear 211 drives the bracket 213, so that the hammer axis 31 for being connected to the bracket 213 is rotated around first axle L1.The bracket 213 also interlocks the bullet simultaneously Spring 36, and then interlock inner ring hammer 32.The inner ring hammer 32 due to the rolling member 315 respectively along corresponding V-arrangement ditch 314 slide, Inner ring hammer 32 is moved back and forth relative to the hammer axis 31 along the direction first axle L1 with when the hammer axis 31 rotates.It should Inner ring hammer 32 interlocks outer ring hammer 33 by the ball 34 and rotates around first axle L1, and since the guide groove 331 is parallel Extend in first axle L1, the ball 34 is rolled along the guide groove 331, it should without influencing 32 edge of inner ring hammer The direction first axle L1 is mobile.Since first gasket 37 and the second gasket 38 generate positioning relative to the housing unit 4, so that Movement of the outer ring hammer 33 along the direction first axle L1 is limited.That is, outer ring hammer 33 can only be around the first axle L1 is rotated and can not be moved along the direction first axle L1.

When the hammer axis 31 rotates, the hammering convex block 322 of inner ring hammer 32 staggeredly connects with the output convex block 352 of output hammer 35 It closes and interlocks each other.When the axis body 351 of output hammer 35 is embedded in the screw and meets with load, inner ring hammer 32 compresses the bullet Spring 36 simultaneously generates displacement along the direction first axle L1, finally makes the hammering convex block 322 and the output convex block 352 each other Escape simultaneously discharges elastic position energy.The hammering convex block 322 of inner ring hammer 32 is hammered by elastic position energy revolution at a high speed in the output The output convex block 352 of hammer 35, and then generate the effect for the screw that locks.

Double hammer impact wrench of the invention have effects that following:

1. the power due to hammering is influenced by rotary inertia, outer ring hammer 33 by inner ring hammer 32 interlock and around this One axis L1 rotation, can effectively increase rotary inertia go forward side by side a successive step hammering power.

2. compared to the single hammer impact wrench addressed in prior art, outer ring hammer 33 is along the first axle L1 when hammering The movement in direction is limited without generating additional vibration.

3. compared to a kind of double hammers existing as disclosed in No. 10175610 patent of People's Republic of China's publication No. Formula impact wrench, the present invention use the ball 34 rather than needle rollers, the ball 34 and the guide groove 331, the pearl slot 321 contact area is smaller, and then the frictional force between the guide groove 331, the pearl slot 321 is also smaller, generates to be promoted and move Make the effect of fluency.

4. the problem of capable of also excluding needle rollers positional shift simultaneously using the ball 34 and swinging, and can be by described Pearl slot 321 positions and omits elastic component, generates the effect for reducing vibration and simplifying structure.

5. in manufacture view, due to the ball 34 and the guide groove 331 can with shorter length and lesser area that This contact, so that machining accuracy needed for the guide groove 311 is low compared with when using needle rollers, and the guide groove 331 can be borrowed easily It is process by broaching tool, manufacturing cost is lower.

Refering to Fig. 6 to Fig. 7, the difference of a second embodiment and the first embodiment of the double hammer impact wrench of the present invention It is the hammering unit 3.

The hammering unit 3 further includes a roller bearing 39 and omits first gasket 37.Outer ring hammer 33 has multiple Guide groove 331, one around first axle L1 and corresponding to the pearl slot 321 correspond to the output end 312 and directly abut In the head of the housing unit 4 334 and a hammer body portion 335 extended by the head 334 towards the driving end 311.The roller axle Holding 39 has a stop collar 391 and multiple rollers 392.The stop collar 391 is sheathed on outside the hammer body portion 335 and side is supported In the head 334.The roller 392 is limited in the stop collar 391 and can roll along the stop collar 391.Second gasket 38 are annularly sheathed on outside the hammer body portion 335 and are resisted against the side of the stop collar 391 far from the head 334.Second gasket 38 generate positioning relative to the housing unit 4 so that outer ring hammer 33 can only be rotated around first axle L1 and can not along this One direction axis L1 is mobile.

Compared to the first embodiment, second gasket 38 is not resisted against outer ring hammer 33 in this second embodiment, But it is resisted against the stop collar 391.And the frictional force between the roller bearing 39 and second gasket 38 is greater than outer ring hammer 33 With the frictional force between the roller bearing 39.That is, outer ring hammer 33 reduces friction indirectly by the roller bearing 39 The effect of power, and generate the effect of enhancing action fluency.

In conclusion the double hammer impact wrench of the present invention are assisted by inner ring hammer 32, outer ring hammer 33 and the ball 34 With movement, generates enhancing action fluency and reduce the effect of vibration simultaneously, so the purpose of the present invention can be reached really.