CN205057965U - Electric hammer of antioverloading - Google Patents
Electric hammer of antioverloading Download PDFInfo
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- CN205057965U CN205057965U CN201520733443.1U CN201520733443U CN205057965U CN 205057965 U CN205057965 U CN 205057965U CN 201520733443 U CN201520733443 U CN 201520733443U CN 205057965 U CN205057965 U CN 205057965U
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- gear
- cylinder
- spacing ball
- groove
- electric hammer
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Abstract
The utility model discloses an electric hammer of antioverloading, including cylinder and edge the cylinder axis direction with the cylinder keeps relatively fixed's gear, the one end of gear is provided with the recess, still include spacing ball with be used for with spacing ball pushes elastic component in the recess, be provided with on the cylinder along the axis direction of self extend and with spacing ball sliding fit's slide, spacing ball is in under the effect of elastic component, some is located in the slide, some is located in the recess, the cell wall of recess from the one end that has the notch to the other end gradually to the central line of recess is close to, spacing ball with the cell wall of recess offsets. Because the gear breaks away from with spacing ball before the gear need bear bigger moment of torsion, avoided the gear to bear bigger effort, and then can avoid the teeth of a cogwheel of gear to be damaged.
Description
Technical field
The utility model relates to machine tool technical field, more particularly, relates to a kind of antioverloading electric hammer.
Background technology
Electric hammer belongs to the one of electric drill, and electric hammer is mainly used for holing on mixed earth, floor, brick wall and stone material etc.Because general electric drill, be difficult to directly to impact hard outer surface punch, and electric hammer is on the basis of electric drill, add a piston by motor-operated crankshaft-link rod, piston is reciprocating air in a cylinder, make cylinder air pressure be cyclically-varying, the hammer in the air pressure band dynamic air cylinder of change back and forth hits the top of drill bit, makes drill bit can also carry out hammering while brill.
Concrete, an electric hammer generally comprises two groups of transmission components, and transmission component generally comprises power transmission shaft, clutch and gear, and its middle gear realizes transmission together with the gears meshing of the power transmission shaft of motor.In two groups of transmission components, one group of transmission component is drill bit rotational transmission component, another transmission component is drill bit hammering transmission component, and wherein drill bit rotational transmission component generally comprises power transmission shaft, with motor shaft tooth meshed gears with make the clutch of power transmission shaft and gear-linked.Drill bit is relative with cylinder fixing, and namely the rotation of cylinder can drive the rotation of drill bit, and cylinder is connected by bevel-gear sett with the power transmission shaft of drill bit rotational transmission component.
In order to prevent overload, generally overload protection can be set on the power transmission shaft of drill bit rotational transmission component, but when the power that moment of torsion is subject to increases instantaneously time, because gear stage is many, within the response time, be easy to damage gear wheel and pinion.
In sum, the gear teeth how effectively solving gear hold flimsy problem, are current those skilled in the art's urgent problems.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of antioverloading electric hammer, and the gear teeth that this electric hammer can solve gear effectively hold flimsy problem.
In order to achieve the above object, the utility model provides following technical scheme:
A kind of antioverloading electric hammer, comprise cylinder and keep relatively-stationary gear along described cylinder-bore axis direction and described cylinder, one end of described gear is provided with groove, also comprise spacing ball and for described spacing ball being pushed the elastic component in described groove,, the axis direction described cylinder is provided with along self extends and the slideway be slidably matched with described spacing ball; Described spacing ball is under the effect of described elastic component, and a part is positioned at described slideway, and a part is positioned at described groove; The cell wall of the described groove center line from the one end with notch to the other end gradually to described groove is close, and the cell wall of described spacing ball and described groove offsets.
Preferably, the both sides cell wall of described V-type groove lays respectively at the both sides circumferentially of described spacing ball along described cylinder.
Preferably, described cylinder comprises fixing and fixed head in the form of a ring relative to cylinder body, and described fixed head is set on described cylinder body, and described installation of slide track is on described fixed head.
Preferably, described fixed head offsets away from the first limiting component on the side of described gear and described cylinder body, described fixed head offsets near the side of described gear and described gear, between described cylinder body and described fixed head, is also provided with both restrictions the second limiting component in relative rotation.
Preferably, described second limiting component is in spherical positive stop key.
Preferably, described fixed head is provided with passage or the air channel of through both sides.
Preferably, described elastic component plays spring for compression, is also provided with the first back-up ring between described Compress Spring and described spacing ball.。
Preferably, also comprise axle-steel silk gear and the second back-up ring of being arranged on away from one end of described gear on described Compress Spring, described steel wire gear is relative with described cylinder fix and with described second back-up ring on offset away from the side of described Compress Spring.
Preferably, described axle-steel silk keeps off ringwise and has fracture, and described axle-steel silk gear can adjust the size of inner ring at External Force Acting, described cylinder is provided with the draw-in groove of the described axle-steel silk gear of restriction along the axis direction movement of described cylinder.
Preferably, described cylinder is also provided with spacing preiection, and described spacing preiection can stop spacing ball described in described resilient element urges when described spacing ball enters in described groove.
The antioverloading electric hammer of the one that the utility model provides, this electric hammer comprises cylinder, gear, spacing ball and elastic component.At the axis direction along cylinder, gear and cylinder keep relative fixing, it should be noted that herein, should be rotatably connected between cylinder and gear.One end on gear is provided with the groove for holding a spacing ball part, and elastic component is used for spacing ball to push in groove.Axis direction cylinder being also provided with self extends and the slideway be slidably matched with spacing ball.Under the effect of elastic component, a part for spacing ball is positioned at slideway, and a part is positioned at groove.The cell wall of its further groove is from the one end with notch to the other end gradually to the centerline dip of groove, and the cell wall of spacing ball and groove offsets.
Can know according to above-mentioned technical scheme, the antioverloading electric hammer that the utility model provides, when the moment of torsion that drill bit is subject within the limits prescribed time, the now rotation of gear can drive the rotation of spacing ball, now the cell wall of groove can apply torque forces to spacing ball, it should be noted that herein, because cell wall tilts, so the active force that spacing ball is subject to cell wall should be divided into the axis direction of parallel cylinder power and perpendicular to axis direction power, and the elastic force of wherein parallel to the axis direction force and elastic component offsets, and wherein spacing ball can be driven to rotate perpendicular to the power of axis direction.Because now under the effect of elastic component, spacing ball can be against in groove.Because spacing ball coordinates with the axial sliding movement of slideway along cylinder, and when spacing ball rotates around the axis of cylinder, so spacing ball can be with dynamic air cylinder to rotate together, and then cylinder can drive drill bit to rotate together.And when the moment of torsion that drill bit is subject to exceeds prescribed limit, active force now between gear and spacing ball will increase, gear will be greater than the elastic force of elastic component at the component of the axis direction along cylinder for the active force of spacing ball, spacing ball will move along the axis of cylinder to the direction departing from groove, until when departing from groove, gear just can not drive spacing ball to rotate again.And then can not rotational cylinder be driven.Gear now just can be avoided to be subject to larger moment of torsion.Because need the front gear bearing larger moment of torsion to depart from spacing ball at gear, avoid gear and bear larger active force, so this electric hammer can avoid the gear teeth of gear damaged.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The partial structurtes schematic diagram of the electric hammer that Fig. 1 provides for the utility model embodiment;
In the electric hammer that Fig. 2 provides for the utility model embodiment, fixed head and cylinder body are by the spacing decomposition texture schematic diagram of limiting section;
In the electric hammer that Fig. 3 provides for the utility model embodiment, fixed head and cylinder body are by the spacing decomposition texture schematic diagram of spherical positive stop key.
Detailed description of the invention
The utility model embodiment discloses a kind of antioverloading electric hammer, holds flimsy problem with the gear teeth effectively solving gear.
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-Fig. 3, the partial structurtes schematic diagram of the electric hammer that Fig. 1 provides for the utility model embodiment; In the electric hammer that Fig. 2 provides for the utility model embodiment, fixed head and cylinder body are by the spacing decomposition texture schematic diagram of limiting section; In the electric hammer that Fig. 3 provides for the utility model embodiment, fixed head and cylinder body are by the spacing decomposition texture schematic diagram of spherical positive stop key.
In one embodiment, present embodiments provide a kind of antioverloading electric hammer, this electric hammer comprises cylinder 1, gear 2, spacing ball 3 and elastic component 4.At the axis direction along cylinder 1, gear 2 keeps relative with cylinder 1 to be fixed, and it should be noted that herein, should be rotatably connected between cylinder 1 and gear 2, and namely the rotation of gear 2 should directly be with dynamic air cylinder 1 to rotate.Concrete, gear 2 can being made to have cylindrical hole, cylinder 1 has the cylindrical portion with cylindrical hole matched in clearance, being provided with at the two ends of gear 2 for stoping gear 2 along the parts of the axis direction movement of cylinder 1.
One end on gear 2 is provided with the groove for holding spacing ball 3 part, and elastic component 4 is for pushing in groove by spacing ball 3, and it should be noted that elastic component 4 herein can be draw springs herein, also can be compression elastic piece.For the ease of arranging the position of elastic component 4, elastic component 4 generally all selects compression elastic piece, concrete, and one end of elastic component 4 keeps relative with cylinder 1 and fixes, and the other end promotes spacing ball 3 in groove.
Cylinder 1 is also provided with along self axis direction extend and with the slideway that spacing ball 3 is slidably matched, it should be noted that herein, because the effect of slideway, make spacing ball 3 be merely able to move along the bearing of trend of slideway.Under the effect of elastic component 4, a part for spacing ball 3 is positioned at slideway, and a part is positioned at groove.The cell wall of its further groove center line from the one end with notch to the other end gradually to groove is close, and spacing ball 3 offsets with the cell wall of groove.Namely groove cell wall be tilt, and in groove with spacing ball 3 what offset is the recess of groove.Make the cell wall of groove not only have the axis of vertical cylinder 1 to the active force of spacing ball 3, also should have power that the is parallel and axis direction of cylinder 1.
In use, when the moment of torsion that drill bit is subject within the limits prescribed time, the now rotation of gear 2 can drive the rotation of spacing ball 3, now the cell wall of groove can apply torque forces to spacing ball 3, it should be noted that herein, because cell wall tilts, so the active force that spacing ball 3 is subject to cell wall should be divided into the axis direction of parallel cylinder 1 power and perpendicular to axis direction power, and the elastic force of wherein parallel to the axis direction force and elastic component 4 offsets, and wherein can drive spacing ball 3 perpendicular to the power of axis direction.Because now under the effect of elastic component 4, spacing ball 3 can be against in groove.A part for spacing ball 3 is positioned at groove, and a part is positioned at slideway.Because spacing ball 3 coordinates with the axial sliding movement of slideway along cylinder 1, and when spacing ball rotates around the axis of cylinder 1, spacing ball 3 can be with dynamic air cylinder 1 to rotate together, and then drives drill bit to rotate together by cylinder 1.And when the moment of torsion that drill bit is subject to exceeds prescribed limit, active force now between gear 2 and spacing ball 3 will increase, gear 2 will be greater than the elastic force of elastic component 4 at the component of the axis direction along cylinder 1 for the active force of spacing ball 3, spacing ball 3 will move along the axis of cylinder 1 to the direction departing from groove, until when departing from groove, gear 2 just can not drive spacing ball 3 to rotate again.And then dynamic air cylinder 1 can not be with to rotate.Gear 2 now just can be avoided to be subject to larger moment of torsion.So need the front gear 2 bearing larger moment of torsion to depart from spacing ball 3 at gear 2, avoid gear 2 and bear larger active force, and then the gear teeth of gear 2 can be avoided damaged.
In order to control the active force between spacing ball 3 and the cell wall of groove more accurately, avoid the active force between spacing ball 3 and groove excessive, groove can be made to be V-type groove, in order to ensure that V-type groove can drive spacing ball 3 to rotate around the axis of cylinder 1, the both sides cell wall of V-type groove should be made to lay respectively at both sides circumferentially along cylinder 1 on spacing ball 3, and cell wall restriction spacing ball 3 opposed gear 2 namely tilted by the both sides of V-type groove is moved along the circumferencial direction of gear 2.Wherein the setting of V-type groove can also be avoided because the diameter of gear 2 and the restriction of cylinder 1 diameter, and causes the diameter for spacing ball 3 to limit.Because be point cantact between V-type groove and spacing ball 3, compare linear contact lay, frictional force is little, and spacing ball 3 more easily slides and rolls.
For the ease of arranging slideway, and being convenient to manufacture cylinder 1, cylinder 1 can be made to comprise cylinder body and fixed head 11 relatively-stationary with cylinder body, fixed head 11 in the form of a ring and be set on cylinder body, and by installation of slide track at fixed head 11.Wherein cylinder body can with in prior art design.The installation of slide track increased is on fixed head 11.Wherein fixed head 11 is in platy structure, platy structure gets out slideway ratio and is easier to.
For the ease of arranging fixed head 11, make that fixed head 11 is more convenient to be removed and installed, can make to be detachable installation between fixed head 11 and cylinder body, wherein can make fixed head 11 offsets away from the first limiting component on the side of gear 2 and cylinder body, it is emphasized that this first limiting component should be move along the axis direction of cylinder 1 for limiting fixed head 11 herein.And fixed head 11 offsets near the side of gear 2 and gear 2, move with the axis direction of limiting gear 2 along cylinder 1, based on the setting of fixed head 11, namely can arrange the spacing card key of ring-type at gear 2 away from one end of fixed head 11, spacing card key and cylinder 1 clamping are with the movement of limiting gear 2.By the first limiting component and gear 2, make on the axis direction along cylinder 1, fixed head 11 is relative with cylinder body fixing.Also should be provided with between fixed head 11 and cylinder body and limit cylinder body and fixed head the second limiting component 12 in relative rotation.Wherein the second limiting component 12 can be positive stop key, and wherein positive stop key can be spherical, also can be along the Axis Extension of cylinder arrange shaft-like, be preferably spherical positive stop key.Second limiting component 12 can also be arranged on the fastener for engaging with the draw-in groove of fixed head 11 on cylinder body, and fastener and draw-in groove are slidably matched along the axis direction of cylinder 1.Fastener can be one-body molded with cylinder body, also can be to be connected together with cylinder body.
In concrete use, cylinder 1 has air pressure than the gas of the change that is easier to reciprocal property or the gas of fever expansion outside one end of drill bit, so gas herein needs to communicate with the external world, if and directly passage is set at the housing position being positioned at this place, housing seal can be made bad, more easily enter dust, based on this, venting channels is being set along the axis direction of cylinder 1.But due to fixed head 11 because arrange slideway, so need outstanding cylinder body to arrange.In order to avoid whole electric hammer has been seen more too fat to move, can arrange passage or the air channel of through both sides on fixed head 11, consider the restriction of gear 2, only can arrange air channel, concrete air channel can be arranged on the lateral surface of fixed head 11.
Conveniently arrange elastic component 4, elastic component 4 can be made for spring, and concrete can be Compress Spring, Compress Spring is arranged fixed head 11 one end away from gear 2.In order to enable Compress Spring better promote spacing ball 3, can arrange the first back-up ring 5 between spacing ball 3 and Compress Spring, the plate face of back-up ring can ensure stable promotion spacing ball 3.The other end of Compress Spring can be relative with cylinder 1 fixing, also can keep off 7 to provide support power to Compress Spring by the second back-up ring 6 and axle-steel silk.Concrete, second back-up ring 6 is arranged on the other end of Compress Spring namely away from one end of gear 2, axle-steel silk gear 7 offsets with the second side away from Compress Spring on back-up ring 6, and to stop the second back-up ring 6 to move to the direction away from Compress Spring, and then guarantee provides support power to Compress Spring.It can be clamping that axle has steel wire to keep off between 7 and cylinder 1, also can be welding.Keep off 7 to make axle-steel silk and there is better replaceability, so preferably make axle-steel silk keep off clamping between 7 and cylinder 1, concrete has the draw-in groove of restrictive axes steel wire gear 7 along the axis direction movement of cylinder 1 on cylinder 1, wherein axle-steel silk gear 7 ringwise, and disconnect at a place, when needs are stuck in draw-in groove, first can support macro-axis steel wire and keep off 7 inner rings, can move in draw-in groove on cylinder 1 after making axle-steel silk keep off 7 distortion, when moving to draw-in groove place, the compressional axis inner ring of steel wire gear 7, makes axle-steel silk keep off 7 and is stuck in draw-in groove.
Consider when spacing ball 3 is positioned at groove, spacing ball 3 can play the effect of transmission, if now elastic component 4 also applies pressure to spacing ball 3 to groove direction, can make to have between spacing ball 3 and the cell wall of groove and larger compress power, spacing ball 3 can be limited and rotate in groove.Based on this, can arrange spacing preiection on cylinder 1, this spacing preiection stops elastic component 4 to promote spacing ball 3 when spacing ball 3 enters in groove.Concrete, when under the effect of spacing ball 3 in elastic force, when entering in groove, now elastic component 4 can offset with spacing preiection, provides resistance by spacing preiection to elastic component 4.This spacing preiection can be same parts with the first limiting component, namely the both sides of this spacing preiection offset with elastic component 4 and fixed head 11 respectively, wherein spacing preiection can be weld together with cylinder body, also can be that both are one-body molded, can also by the draw-in groove on cylinder body and cylinder body clamping, snap fit can be coaxially identical with the snap fit between cylinder 1 with steel wire gear 7.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an antioverloading electric hammer, comprise cylinder (1) and keep relatively-stationary gear (2) along described cylinder (1) axis direction and described cylinder (1), it is characterized in that, one end of described gear (2) is provided with groove, also comprising spacing ball (3) and for described spacing ball (3) being pushed the elastic component (4) in described groove, described cylinder (1) being provided with and extending and the slideway be slidably matched with described spacing ball (3) along self axis direction; Described spacing ball (3) is under the effect of described elastic component (4), and a part is positioned at described slideway, and a part is positioned at described groove; The cell wall of the described groove center line from the one end with notch to the other end gradually to described groove is close, and described spacing ball (3) offsets with the cell wall of described groove.
2. electric hammer according to claim 1, is characterized in that, described groove is V-type groove, and the both sides cell wall of described V-type groove lays respectively at the both sides circumferentially of described spacing ball (3) along described cylinder (1).
3. electric hammer according to claim 2, it is characterized in that, described cylinder (1) comprises fixing and fixed head (11) in the form of a ring relative to cylinder body, described fixed head (11) is set on described cylinder body, and described installation of slide track is on described fixed head (11).
4. electric hammer according to claim 3, it is characterized in that, described fixed head (11) offsets away from the first limiting component on the side of described gear (2) and described cylinder body, the upper side near described gear (2) of described fixed head (11) and described gear (2) offset, and are also provided with both restrictions the second limiting component (12) in relative rotation between described cylinder body and described fixed head (11).
5. electric hammer according to claim 4, is characterized in that, described second limiting component (12) is in spherical positive stop key.
6. electric hammer according to claim 3, is characterized in that, described fixed head (11) is provided with passage or the air channel of through both sides.
7. electric hammer according to claim 3, is characterized in that, described elastic component (4) is Compress Spring, is also provided with the first back-up ring (5) between described Compress Spring and described spacing ball (3).
8. electric hammer according to claim 7, it is characterized in that, also comprise axle-steel silk gear (7) and the second back-up ring (6) of being arranged on away from one end of described gear (2) on described Compress Spring, described axle-steel silk gear (7) is relative with described cylinder (1) fix and with described second back-up ring (6) on offset away from the side of described Compress Spring.
9. electric hammer according to claim 8, it is characterized in that, described axle-steel silk gear (7) ringwise and have fracture, described axle-steel silk gear (7) can adjust the size of inner ring at External Force Acting, described cylinder (1) is provided with the draw-in groove of described axle-steel silk gear (7) of restriction along the axis direction movement of described cylinder (1).
10. the electric hammer according to any one of claim 1-9, it is characterized in that, described cylinder (1) is also provided with spacing preiection, and described spacing preiection can stop described elastic component (4) to promote described spacing ball (3) when described spacing ball (3) enters in described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520733443.1U CN205057965U (en) | 2015-09-21 | 2015-09-21 | Electric hammer of antioverloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520733443.1U CN205057965U (en) | 2015-09-21 | 2015-09-21 | Electric hammer of antioverloading |
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| Publication Number | Publication Date |
|---|---|
| CN205057965U true CN205057965U (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520733443.1U Active CN205057965U (en) | 2015-09-21 | 2015-09-21 | Electric hammer of antioverloading |
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| CN (1) | CN205057965U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107914248A (en) * | 2018-01-12 | 2018-04-17 | 江苏恒丰电动工具有限公司 | A kind of portable dial is turned round |
| CN112571528A (en) * | 2020-10-27 | 2021-03-30 | 孙刚 | Can reduce padauk door of installation location degree of difficulty |
-
2015
- 2015-09-21 CN CN201520733443.1U patent/CN205057965U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107914248A (en) * | 2018-01-12 | 2018-04-17 | 江苏恒丰电动工具有限公司 | A kind of portable dial is turned round |
| CN112571528A (en) * | 2020-10-27 | 2021-03-30 | 孙刚 | Can reduce padauk door of installation location degree of difficulty |
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Effective date of registration: 20190912 Address after: Three road 321200 Zhejiang city of Jinhua province Wuyi Huanglong County Hushan Street Huanglong Industrial Zone No. 18 Patentee after: Jinhua poly Electric Appliance Co., Ltd. Address before: Three road 321200 Zhejiang city of Jinhua province Wuyi Huanglong County Hushan Street Huanglong Industrial Zone No. 18 Patentee before: Zhejiang SKT Electric Machine Co., Ltd. |