CN202831027U - Novel vibration hammer - Google Patents
Novel vibration hammer Download PDFInfo
- Publication number
- CN202831027U CN202831027U CN 201220501933 CN201220501933U CN202831027U CN 202831027 U CN202831027 U CN 202831027U CN 201220501933 CN201220501933 CN 201220501933 CN 201220501933 U CN201220501933 U CN 201220501933U CN 202831027 U CN202831027 U CN 202831027U
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- vibration
- outer container
- shaker arm
- bearing
- hammer
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Abstract
The utility model discloses a novel vibration hammer which comprises a mounting outer case and a vibration device. The vibration device comprises a vibrating case and a vibrating arm, wherein the upper end of the vibrating case and the upper end of the vibrating arm are both located inside the mounting outer case, the vibrating case comprises a single eccentric gear which is arranged inside the vibrating case. Bearing frames and bearings are arranged in the mounting outer case, wherein the bearings are mounted on the bearing frames, anti-vibration glue is arranged next to the bearings, located between the bearing frames and the mounting outer case, and fixedly connected with the bearing frames and the mounting outer case, and the bearing frames are fixedly connected with the mounting outer case through the anti-vibration glue. The vibrating arm is connected with the mounting outer case through an oscillating bar. The oscillating bar comprises an upper oscillating bar and a lower oscillating bar. The upper oscillating bar, the lower oscillating bar, the vibrating arm and the mounting outer case form a four-bar mechanism with the mounting outer case used as a fixed framework. According to the novel vibration hammer, only the single eccentric gear is arranged, balance can be guaranteed, materials are saved, cost is low, the application range is wide, the bottom end of the vibrating arm can be provided with vibrating teeth or a flat press plate, and the novel vibration hammer has multiple functions.
Description
Technical field
The utility model relates to engineering machinery field, relates in particular to a kind of equipment for excavator.
Background technology
Excavator is for finishing data mining duty, mainly at several work facility such as the equipped excavation of its swing arm, lifting, loading, soil-shifting, jump bits.Quartering hammer is exactly an important power tool of excavator, existing quartering hammer mostly is the piston hydraulic quartering hammer, its power resources are the pressure oil that the pumping plant of excavator or loader provides, hydraulic breaking hammer is as power take hydrostatic pressure, driven plunger moves back and forth, high-speed impact drill steel during piston stroke is by solids such as drill steel breaking ores, concrete.Such quartering hammer is simple to operate, uses also extensively, and shortcoming is that operating efficiency is not high, power consumption, and noise is large, and impact in the form of piston is easily to quartering hammer especially drill steel itself and supporting excavator injury.Development along with technology, a kind of vibration hammer has appearred, it is a kind ofly to utilize centrifugal force to pump to produce the quartering hammer of destructive power with what motor drove, existing vibration hammer generally arranges two eccentric wheels that can synchronous backward rotate in the exciting case, like this, eccentric wheel centrifugal force in the horizontal direction just can be cancelled out each other, thereby ensure eccentric wheel balance in the horizontal direction, the centrifugal force of vertical direction then can superpose mutually, thereby drive the cracking hammer head up-down vibration that is connected with the exciting case, and constantly knock to allow the target working substance disintegrate division to the target working substance, be the utility model patent of CN201713849U discloses so a kind of hydraulic resonant breaking hammer such as notice of authorization number.
Yet above-mentioned existing vibration hammer in order to ensure the balance of the balance of quartering hammer, especially horizontal direction, but need to arrange eccentric wheel that two synchronous backwards rotate as shaking core.The quartering hammer of two cores that shake like this, consume material, cost is high, and gravity is very large, thereby the excavator that this quartering hammer is installed is required also high, needs the horsepower that provides larger in the use, therefore the range of application of above-mentioned existing vibration hammer is restricted, generally be disposed at large excavator, can't be disposed at mini-excavator, mini-excavator then can only use existing hydraulic breaking hammer in the form of piston.In addition, two eccentric wheels yet can cause the waste of power when the centrifugal force of offset by the level of direction.
The utility model content
For overcoming the defective of above-mentioned prior art, technical problem to be solved in the utility model is to provide a kind of and is widely used, saves material, the novel vibration hammer that cost is low, efficient is high.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of novel vibration hammer, it comprises installs outer container and vibrating device, the shaker arm that described vibrating device involving vibrations case, top and vibrating bin are fixing, the upper end of described vibrating bin and shaker arm all is positioned at installs outer container inside, and described vibrating bin comprises the single eccentric wheel of being located at its inside and is installed on the CD-ROM drive motor that vibrating bin rotates for the driving eccentric wheel; Described installation outer container inside is provided with bearing bracket stand, bearing and anti-vibration rubber, and described bearing is installed on described bearing bracket stand, and described bearing bracket stand is fixedly connected with the installation outer container by described anti-vibration rubber; Described shaker arm is connected with described installation outer container by fork, described fork comprises upper pendulum bar and draft link, the separately two ends of described upper pendulum bar and draft link are hinged by pitman shaft and described bearing and described shaker arm respectively, described upper pendulum bar, draft link and described shaker arm, outer container is installed is formed quadric chain take described installation outer container as fixed frame.
As the improvement of the novel vibration hammer of the utility model technical scheme, described anti-vibration rubber is arranged at described bearing upper and lower.
Another kind as the novel vibration hammer of the utility model technical scheme improves, and described anti-vibration rubber is around described bearing arrangement.
As improvement of the technical scheme, be provided with the vibrationproof air bag between described shaker arm top and the described installation outer container.
As improvement of the technical scheme, described shaker arm upper end is provided with elongated portion towards described installation outer container inside, described elongated portion is between the pitman shaft of draft link and bearing in the described connection, the pitman shaft of described connection draft link and bearing is provided with the support anti-vibration rubber, and described support anti-vibration rubber is between the pitman shaft and described elongated portion of described connection lower link and bearing.
As improvement of the technical scheme, described anti-vibration rubber is fixedly connected with described bearing bracket stand with described installation outer container by screw.
As improvement of the technical scheme, described installation outer container has working window.
As improvement of the technical scheme, described CD-ROM drive motor is hydraulic motor.
The improvement of the technical scheme that novel vibration is hammered into shape as the utility model, the vibration tooth is installed in described shaker arm bottom.
The another kind of the technical scheme that novel vibration is hammered into shape as the utility model improves, and the smooth pressing plate that can be used for ground grading is installed in described shaker arm bottom.
Implement the technical solution of the utility model, have following beneficial effect:
The novel vibration of the utility model hammer only comprises an eccentric wheel as shaking core, and the structure that outer container is installed has been made the substantial improvements that adapts, thereby has ensured that single eccentric vibrating bin is in the balance of vibration processes.Because the utility model vibration hammer only comprises an eccentric wheel, saved material, reduced cost, and compared to the vibration of double eccentric wheel hammer, deadweight alleviates greatly, and the required power that provides also greatly reduces accordingly, thereby, the utility model both can be installed on large-scale excavator, more can be matched with small-sized excavator, use thereby obtained more widely.In addition, two eccentric wheel synchronous backward rotations of the vibration hammer of double eccentric wheel, in the process that the centrifugal force of its horizontal direction is cancelled out each other, power also is depleted has wasted a part, and the technical solution of the utility model, single eccentric rotation can not produce the loss of this part power, thereby has improved efficient.If the vibration tooth is installed in the bottom at shaker arm, then this vibration hammer has the swing crushing function; And if in the bottom of shaker arm smooth pressing plate is installed, then this vibration hammer is obtained the function of ground grading.
Description of drawings
Fig. 1 is the structural representation that existing vibration hammer is installed outer container;
Fig. 2 is the assembling schematic diagram of a kind of novel vibration hammer embodiment of the utility model;
Fig. 3 is the main TV structure schematic diagram of the utility model embodiment;
Fig. 4 is the left-hand view of the utility model embodiment internal construction;
Fig. 5 is the left view that the utility model embodiment shown in Figure 2 installs outer container;
Fig. 6 is the structural representation of the bearing bracket stand of the utility model embodiment;
Fig. 7 is the structural representation that another kind of embodiment is hammered in the novel vibration of the utility model into shape.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is specifically described.
Fig. 1 is the structural representation of the installation outer container of existing vibration hammer, and as shown in the figure, bearing 12 directly is arranged at two side bodies that outer container 1 is installed, and that is to say, has axis hole in two side bodies, thereby bearing 12 is set, and the pitman shaft that is connected with shaker arm is installed.The structure of such installation outer container, if what use is the vibration hammer of double eccentric wheel, because two eccentric wheels can be offset at the centrifugal force of the horizontal direction of the plane of oscillation, the centrifugal force of vertical direction then superposes, thereby, whole vibrating bin can be at vertical direction to install outer container as the fixed frame up-down vibration, and other directions, especially horizontal direction then can keep balance.If yet an eccentric wheel only is set as shaking core in the vibrating bin, because all directions of the plane of oscillation all have centrifugal force, therefore, when the vibrating bin up-down vibration, same, also can be to other direction vibrations, especially horizontal direction, when vibration is delivered to when outer container is installed, outer container is installed also can be thereupon in plane of oscillation oscillation crosswise, thereby so that whole quartering hammer is difficult to average out, can't work.
Fig. 2 is the assembling schematic diagram that a kind of embodiment is hammered in a kind of novel vibration of the utility model into shape, and Fig. 3 is the main TV structure schematic diagram of the utility model embodiment; Fig. 4 is the left-hand view of the utility model embodiment internal construction.As shown in the figure, the utility model embodiment comprises installation outer container 1 and vibrating device 2, vibrating device involving vibrations case 20 and shaker arm 3, vibrating bin 20 is fixed with the top of shaker arm 3, concrete, can the hole that match with the vibrating bin size be set on the top of shaker arm, vibrating bin is mounted and fixed in this hole, the upper end of shaker arm 3 and vibrating bin 20 all are positioned at the inside that outer container 1 is installed.Vibrating bin 2 inside are provided with single eccentric wheel 21, and the CD-ROM drive motor 23 that rotates be used to driving described eccentric wheel 21 is installed on the casing of vibrating bin, and preferred, CD-ROM drive motor 23 is hydraulic motor.In the present embodiment, vibration tooth 4 is installed in the bottom of shaker arm 3.
As shown in Figure 4, shaker arm 3 is connected with installation outer container 1 by fork, fork comprises upper pendulum bar 311 and draft link 321, one end of upper pendulum bar 311 and draft link 321 is respectively by pitman shaft 331, pitman shaft 341 is installed on the bearing 12 of bearing bracket stand 11, the other end is respectively by pitman shaft 332, pitman shaft 342 is hinged with shaker arm 3, described upper pendulum bar 311, draft link 321 and described shaker arm 3, outer container 1 is installed has just been formed one outer container 1 to be installed as the quadric chain of fixed frame, and, when vibrating bin 20 vibration, shaker arm 3 just can swing up and down along with the vibration of vibrating bin together with upper pendulum bar 311 and draft link 321.
Concrete, upper pendulum bar and draft link all arrange in pairs, for distinguishing, the upper pendulum bar that arranges is not in pairs looked out among called after the first upper pendulum bar 311 and second upper pendulum bar 312(Fig. 4 respectively), the draft link that arranges is not in pairs looked out among called after the first draft link 321 and second draft link 322(Fig. 4 respectively), pitman shaft 332 on the pitman shaft 331 and second on 332 difference of the pitman shaft 331 that is connected with upper pendulum bar and pitman shaft called after first, the pitman shaft 341 and 342 that is connected with draft link is difference called after the first lower link axle 341 and the second lower link axle 342 then.Described upper pendulum bar and draft link two ends are equipped with axis hole, the top of shaker arm and middle part also are provided with axis hole, thereby the two ends of pitman shaft 331 are passed the axis hole of the first upper pendulum bar 311 and the second upper pendulum bar 312 1 ends and are installed on the bearing 12 of bearing bracket stand 11 on first, the two ends of the first lower link axle 341 are passed the axis hole of the first draft link 321 and the second draft link 322 1 ends and are installed on another bearing of bearing bracket stand 1, therefore, four bearings also have been installed accordingly on bearing bracket stand 11; And pitman shaft 332 passes and two ends are fixed with the axis hole of the first upper pendulum bar 311, the second upper pendulum bar 312 other ends respectively from the axis hole at shaker arm 3 tops on second, and the second lower link axle 342 passes and two ends are fixed with the axis hole of the first draft link 321, the second draft link 322 other ends respectively from the axis hole at shaker arm 3 middle parts.Like this, pitman shaft 331 and the first lower link axle 341 all are fixed in bearing bracket stand and can't swing up and down on first, and pitman shaft 332 and the second lower link axle 342 then can swing up and down with shaker arm on second, and play a part to support shaker arm.
The below introduces operating principle and the beneficial effect of the utility model embodiment: when eccentric wheel 21 high speed rotating of vibrating bin 20, its centrifugal force at the plane of oscillation (plane of oscillation namely as shown in Figure 4 the plane of the axle of vertical eccentric wheel) vertical direction will drive the shaker arm fixed with described vibrating bin vibration at high speed about in the of 3, especially the centrifugal force of horizontal direction will be from shaker arm for other directions, fork and pitman shaft are transmitted to four bearings that pitman shaft 331 and the first lower link axle two ends on described first are installed, because described bearing is installed on bearing bracket stand, and bearing bracket stand is to be fixedly connected with the installation outer container by anti-vibration rubber, therefore, other directions beyond the above-mentioned vertical direction especially centrifugal force of horizontal direction all will come together in anti-vibration rubber in the process that the outer container transmission is installed, thereby dissolved by anti-vibration rubber, simultaneously, anti-vibration rubber has also played the position-limiting action to shaker arm, like this, shaker arm just can not produce oscillation crosswise at the plane of oscillation, and vertical up-down vibration, and also guaranteed to install the balance of outer container, guaranteed that single eccentric vibration hammer can work.Further, because anti-vibration rubber is close to the bearing setting, as be arranged in the upper and lower of bearing, perhaps around bearing arrangement, therefore can better dissolve the vibration of the horizontal direction that the centrifugal force of horizontal direction causes, in the time of can guaranteeing the work of vibration hammer, the balance of outer container horizontal direction, guarantee that the vibration tooth converges, and transverse shifting can not occur to the vibration of target working substance the time.
Preferably, between shaker arm 3 tops and installation outer container 1, also be provided with anti-vibration gas-bag 5, shaker arm 3 upper ends are provided with elongated portion 35 towards outer container inside is installed, elongated portion 35 is between upper pitman shaft 331 and lower link axle 341, lower link axle 341 is provided with and supports anti-vibration rubber 6, support anti-vibration rubber between lower link axle 341 and described elongated portion 35, be separated with certain space between between lower link axle 341 and the elongated portion 35.Because the vibrationproof air bag is in compressive state; therefore can produce a downward active force to shaker arm; this moment, shaker arm only supported by supporting anti-vibration rubber in the elongated portion position; thereby be in approximate vacant state; this downward active force can make better the downward vibration target of shaker arm working substance, and the target working substance can be alleviated by the vibrationproof air bag to the reaction force of shaker arm when shaker arm is worked; avoid shaker arm and the hard collision that outer container is installed, thus protection outer container and shaker arm.Shaker arm is when dither; the amplitude of vibration is less than the clearance distance that supports between anti-vibration rubber and the shaker arm elongated portion; thereby the shaker arm elongated portion does not contact with the support anti-vibration rubber; yet when the start of vibration hammer is shut down; the Oscillation Amplitude of shaker arm is larger, and this moment, elongated portion can contact with the support anti-vibration rubber, under the effect of supporting anti-vibration rubber; avoided the hard collision of shaker arm and pitman shaft, protected shaker arm and outer container is installed to exempt from large damage.Because after shaker arm changes normal operation over to, support anti-vibration rubber and then do not contact with elongated portion, it is more durable therefore supporting anti-vibration rubber.
Preferably, have working window 15 on the installation outer container 1, working window 15 can be opened in installs the outer container bonnet, so that observe the working condition of vibration hammer internal vibration case, also is convenient to observe maintenance and vibrating bin is added lubrication oil.Install on the outer container and also be provided with motor cover 16, so that the CD-ROM drive motor that is installed on vibrating bin is protected.Vibrating bin also can be set to hermetically-sealed construction, like this, the eccentric High Rotation Speed of vibrating bin inside just is not easy the loosening of Caused Vibration box body, and hermetically-sealed construction only needs an amount of lubrication oil, and the hydraulic oil of hydraulic motor can cycle through use under certain pressure, hydraulic oil substantially can loss, and therefore, the novel vibration hammer of the utility model is more energy-conservation.
The novel vibration of the utility model hammer embodiment only comprises an eccentric wheel as shaking core, and the structure that outer container is installed has been made the substantial improvements that adapts, thereby has ensured in single eccentric vibrating bin vibration processes in the horizontal balance of the plane of oscillation.Because the utility model vibration hammer only comprises an eccentric wheel, saved material, reduced cost, and compared to the vibration of double eccentric wheel hammer, deadweight alleviates greatly, and the required power that provides also greatly reduces accordingly, thereby, the utility model both can be installed on large-scale excavator, more can be matched with small-sized excavator, use thereby obtained more widely.The vibration hammer of double eccentric wheel in use, because double eccentric wheel synchronous backward rotation, its centrifugal force is in the horizontal direction cancelled out each other, caused to a certain extent the loss of this part power, yet there is not the counteracting of horizontal direction centrifugal force in single eccentric vibration hammer, does not therefore just have the loss of this part power yet.As seen, single eccentric wheel quartering hammer sees that from this angle efficient also is higher, and the loss of power is little, and more power is used for vibration target working substance, and broken effect also can be better naturally.
Use the technical scheme of the novel vibration hammer of the utility model, when the eccentric wheel high-speed of vibrating bin inside rotates, vibrating bin is exciting up and down, because vibrating bin is fixing and shaker arm top, therefore, shaker arm is under the effect of vibrating bin, also incite somebody to action up and down reciprocatingly high speed swinging, the vibration tooth of shaker arm lower end is dither correspondingly, and produces the function that the target working substance is knocked at a high speed, thereby target working substance such as ore and concrete are destroyed.Because the dither of vibration tooth, when the vibration tooth when hitting first object point, its peripheral object has been subject to the damage of corresponding vibration, moves to this periphery object when working again, and just can faster the target working substance be disintegrated.And compared to the vibration of double eccentric wheel hammer, the utility model vibrating bin inside only arranges an eccentric wheel, thereby deadweight reduces greatly, can be more intensive and rapidly the target working substance is carried out vibration percussion, thus further reach the effect of quick crashing.
In addition, the piston type quartering hammer of prior art need to be at the downward target assault target working substance of a high position, when the target working substance of vibration tooth or drill steel bump stone, concrete and so on, sound is loud, noise is large, also easily quartering hammer itself is reached the excavator injury that quartering hammer is installed simultaneously.Yet, use vibration of the present utility model hammer, thereby the vibration tooth only need to knock at a high speed facing to the target working substance at low level the target working substance is damaged, not from the downward process of bump of height, thereby noise is low, and can be to outer container and excavator injury are not installed.Whole vibration hammer equipment, only having several of vibration tooth or anti-vibration rubbers etc. to consume needs to change, and the other side maintenance that substantially do not need repairing greatly reduces coefficient of losses, thereby has reduced the m of e cost, has improved economic benefit.
In the above-described embodiments, what installed the shaker arm bottom is vibration tooth 4, thereby its function is swing crushing, if smooth pressing plate 7 is installed in the bottom of shaker arm, as shown in Figure 7, this vibration hammer then had the function of ground grading then, as seen, the novel vibration hammer of the utility model is multi-functional.Because the dither of vibrating bin, this smooth pressing plate can be obtained good smooth effect, and original hydraulic breaking hammer is owing to adopting the mode of piston type impact grinding, then smooth pressing plate can't be installed in quartering hammer, thereby do not possess this smooth function, existing road roller can only carry out smooth to the level ground, inclined plane such as river levee and so on then can't be carried out smooth, use this equipment as long as handling excavator hammers the vibration of this installations pressing plate into shape the inclination certain angle and just can carry out the inclined plane smoothly, thereby be widely used.
Above disclosed only is preferred embodiment of the present utility model, certainly can not limit with this interest field of the utility model, and the equivalent variations of therefore doing according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (10)
1. a novel vibration is hammered into shape, it is characterized in that: described vibration hammer comprises installs outer container and vibrating device, the shaker arm that described vibrating device involving vibrations case, its upper end and vibrating bin are fixing, the upper end of described vibrating bin and shaker arm all is positioned at installs outer container inside, and described vibrating bin comprises the single eccentric wheel of being located at its inside and is installed on the CD-ROM drive motor that vibrating bin rotates for the driving eccentric wheel;
Described installation outer container inside is provided with bearing bracket stand, bearing and anti-vibration rubber, and described bearing is installed on described bearing bracket stand, and described bearing bracket stand is fixedly connected with the installation outer container by described anti-vibration rubber;
Described shaker arm is connected with described installation outer container by fork, described fork comprises upper pendulum bar and draft link, the separately two ends of described upper pendulum bar and draft link are hinged by pitman shaft and described bearing and described shaker arm respectively, described upper pendulum bar, draft link and described shaker arm, outer container is installed is formed quadric chain take described installation outer container as fixed frame.
2. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: described anti-vibration rubber is arranged at described bearing upper and lower.
3. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: described anti-vibration rubber is arranged around described bearing top circle face.
4. such as each described novel vibration hammer of claims 1 to 3, it is characterized in that: be provided with the vibrationproof air bag between described shaker arm top and the described installation outer container.
5. such as each described novel vibration hammer of claims 1 to 3, it is characterized in that: described shaker arm upper end is provided with elongated portion towards described installation outer container inside, described elongated portion is between the pitman shaft of draft link and bearing in the described connection, the pitman shaft of described connection draft link and bearing is provided with the support anti-vibration rubber, and described support anti-vibration rubber is between the pitman shaft and described elongated portion of described connection lower link and bearing.
6. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: described anti-vibration rubber is fixedly connected with described bearing bracket stand with described installation outer container by screw.
7. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: described installation outer container has working window.
8. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: described CD-ROM drive motor is hydraulic motor.
9. novel vibration hammer as claimed in claim 1 is characterized in that: described shaker arm bottom installation vibration tooth.
10. novel vibration as claimed in claim 1 is hammered into shape, and it is characterized in that: the smooth pressing plate that can be used for ground grading is installed in described shaker arm bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220501933 CN202831027U (en) | 2012-09-28 | 2012-09-28 | Novel vibration hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220501933 CN202831027U (en) | 2012-09-28 | 2012-09-28 | Novel vibration hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202831027U true CN202831027U (en) | 2013-03-27 |
Family
ID=47942772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220501933 Expired - Lifetime CN202831027U (en) | 2012-09-28 | 2012-09-28 | Novel vibration hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202831027U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852178A (en) * | 2012-09-28 | 2013-01-02 | 张桂添 | Novel vibrating hammer |
| CN104088316A (en) * | 2014-07-11 | 2014-10-08 | 上海工程技术大学 | Piston type high-frequency knapper |
| CN106914317A (en) * | 2017-03-06 | 2017-07-04 | 刘涛 | A kind of high-frequency breaking hammer |
-
2012
- 2012-09-28 CN CN 201220501933 patent/CN202831027U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852178A (en) * | 2012-09-28 | 2013-01-02 | 张桂添 | Novel vibrating hammer |
| CN104088316A (en) * | 2014-07-11 | 2014-10-08 | 上海工程技术大学 | Piston type high-frequency knapper |
| CN106914317A (en) * | 2017-03-06 | 2017-07-04 | 刘涛 | A kind of high-frequency breaking hammer |
| CN106914317B (en) * | 2017-03-06 | 2019-05-24 | 刘涛 | A kind of high-frequency breaking hammer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130327 Effective date of abandoning: 20141105 |
|
| RGAV | Abandon patent right to avoid regrant |