CN109333459B - Shock attenuation electric hammer - Google Patents
Shock attenuation electric hammer Download PDFInfo
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- CN109333459B CN109333459B CN201810944221.2A CN201810944221A CN109333459B CN 109333459 B CN109333459 B CN 109333459B CN 201810944221 A CN201810944221 A CN 201810944221A CN 109333459 B CN109333459 B CN 109333459B
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- handle
- electric hammer
- elastic sleeve
- spring
- main body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The invention discloses a shock-absorbing electric hammer, which comprises an electric hammer main body, a rear handle and a front handle, wherein the front upper end of the rear handle is vertically and rotatably connected with the rear upper end of the electric hammer main body through a first shock-absorbing component; the front handle adopts a coil spring and a plurality of liquid shock absorption pieces to play a damping role in the transmission of the shock, so that the shock of the front handle is also obviously reduced; the left hand and the right hand holding the front handle and the rear handle can not feel numb and tired, and the damage to human bodies caused by the vibration of the electric hammer main body is avoided.
Description
Technical Field
The invention belongs to the technical field of hardware tools, and particularly relates to a damping electric hammer.
Background
The electric hammer is a tool for removing a working medium by means of rotation and hammering, most of vibration frequency generated by hammering acts on a human body, so that the phenomena of numbness, fatigue, whitening and the like of fingers in holding are caused, and particularly, the operation difficulty of the electric hammer is obviously increased due to the high-power electric hammer. Most of electric hammers in the prior art have no damping structure, and the handle and the tool main body are directly connected and fixed by screws, namely, a rigid connection mode is adopted, so that the vibration frequency generated by hammering is not weakened and directly acts on arms, and a user feels numbness and fatigue in a short time in use and damages the human body.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a damping electric hammer.
The technical scheme adopted by the invention is as follows: the utility model provides a shock attenuation electric hammer, includes the electric hammer main part, sets up at the back handle of electric hammer main part rear end, sets up the preceding handle at electric hammer main part front end, characterized by:
the front upper end of the rear handle is connected with the rear upper end of the electric hammer main body through a first shock absorption assembly, and the first shock absorption assembly comprises a first U-shaped seat, a first connecting rod, a first pin shaft, a first rubber gasket, a first nut, a first spring and a first corrugated elastic sleeve; the first U-shaped seat is fixed at the rear upper end of the electric hammer main body, a first U-shaped slot is formed in the first U-shaped seat, a notch of the first U-shaped slot is vertical, and a first through hole is formed in the first U-shaped slot; the front end of the first connecting rod is provided with a first inserting plate, the first inserting plate is matched with the first U-shaped slot, the first inserting plate is provided with a first shaft hole, the rear end of the first connecting rod is provided with a first inserting rod, and the first inserting rod can be inserted into the rear handle and can stretch and slide in the rear handle; the first pin shaft penetrates through the first through hole and the first shaft hole and is fixed on the first shaft hole, and external threads are arranged at two ends of the first pin shaft; the two first rubber gaskets are respectively sleeved at two ends of the first pin shaft in a penetrating way and embedded on the first penetrating hole; the two first nuts are respectively screwed on the external threads at the two ends of the first pin shaft; the first spring is sleeved on the first inserting rod in a penetrating mode, one end of the first spring is connected with the first connecting rod, and the other end of the first spring is connected with the rear handle; the first corrugated elastic sleeve wraps the first U-shaped seat and the first connecting rod, one end of the first corrugated elastic sleeve is connected with the electric hammer main body, and the other end of the first corrugated elastic sleeve is connected with the rear handle; the first damping assembly is vertically and rotatably connected with the electric hammer main body, and has obvious damping effect on vertical and front and back vibration under the action of the first rubber gasket, the first spring and the first corrugated elastic sleeve;
the front lower end of the rear handle is connected with the rear lower end of the electric hammer main body through a second shock absorption assembly, and the second shock absorption assembly comprises a second U-shaped seat, a second connecting rod, a second pin shaft, a second rubber washer, a second nut, a second spring and a second corrugated elastic sleeve; the second U-shaped seat is fixed at the rear lower end of the electric hammer main body, a second U-shaped slot is formed in the second U-shaped seat, a notch of the second U-shaped slot is transverse, and a second through hole is formed in the second U-shaped slot; a second inserting plate is arranged at the front end of the second connecting rod and matched with the second U-shaped slot, a second shaft hole is formed in the second inserting plate, and a second inserting rod is arranged at the rear end of the second connecting rod and can be inserted into the rear handle and can stretch and slide in the rear handle; the second pin shaft penetrates through the second through hole and the second shaft hole and is fixed on the second shaft hole, and external threads are arranged at two ends of the second pin shaft; the two second rubber gaskets are respectively sleeved at two ends of the second pin shaft in a penetrating way and embedded in the second through hole; the two second nuts are respectively screwed on the external threads at the two ends of the second pin shaft; the second spring is sleeved on the second inserted link in a penetrating manner, one end of the second spring is connected with the second connecting rod, and the other end of the second spring is connected with the rear handle; the second U-shaped seat and the second connecting rod are wrapped by the second corrugated elastic sleeve, one end of the second corrugated elastic sleeve is connected with the electric hammer main body, and the other end of the second corrugated elastic sleeve is connected with the rear handle; the second damping component is connected with the electric hammer main body in a transverse rotating mode, and has obvious damping effect on transverse and front and back vibration under the action of the second rubber gasket, the second spring and the second corrugated elastic sleeve; the first damping component and the second damping component are matched with each other, so that the vibration of the electric hammer main body in all directions can be effectively absorbed, and the vibration of the rear handle is obviously reduced;
the front handle comprises a connecting piece, a core bar, an outer handle tube, a plurality of coil springs, liquid and a third corrugated elastic sleeve; the connecting piece is movably sleeved at the front end of the electric hammer main body; the core bar is fixed on the connecting piece; the outer handle barrel wraps the core rod and is not in direct contact with the core rod; the coil spring is arranged in the outer handle barrel, a spring strip forming the coil spring becomes thicker gradually from the inner end to the outer end, so that the stiffness coefficient of the coil spring becomes larger gradually from the inner end to the outer end, the inner end of the coil spring is fixed on the side wall of the core rod, the outer end of the coil spring is fixed on the inner side wall of the outer handle barrel, contact points of the inner ends of the coil springs and the side wall of the core rod are uniformly distributed in a spiral direction, contact points of the outer ends of the coil springs and the inner side wall of the outer handle barrel are uniformly distributed in the spiral direction, so that the stress of the core rod is balanced, and the core rod is positioned on the central axis of the outer handle barrel under the action of the balanced force; when the core rod vibrates, the vibration at the inner end of the coil spring connected with the core rod is caused and gradually transmitted to the outer end, and the vibration is gradually attenuated from the inner end to the outer end due to the fact that the coefficient of stiffness of the coil spring is gradually increased from the inner end to the outer end, so that the outer handle barrel connected with the outer end of the coil spring hardly vibrates; the liquid is filled in the outer handle cylinder, and the liquid can play a damping role in the transmission of vibration; the third ripple elastic sleeve is sleeved at the upper end of the core rod in a penetrating mode, the upper end of the third ripple elastic sleeve is connected with the core rod in a sealing mode, the lower end of the third ripple elastic sleeve is connected with the upper end of the outer handle cylinder in a sealing mode, the third ripple elastic sleeve plays a role in sealing liquid, and meanwhile plays a role in damping vibration transmission.
Further, the first rubber gasket and the second rubber gasket are both in a gear shape.
Furthermore, the rear handle and the front handle are both provided with anti-skid lines.
The invention has the beneficial effects that: the first damping component and the second damping component are matched with each other, so that the vibration of the electric hammer main body in all directions can be effectively absorbed, and the vibration of the rear handle is obviously reduced; under the combined action of the coil spring, the liquid and the third corrugated elastic sleeve, the vibration of the electric hammer main body is prevented from being transmitted to the outer handle barrel, so that the vibration of the front handle is also obviously reduced; the left hand and the right hand holding the front handle and the rear handle can not feel numb and tired, and the damage to human bodies caused by the vibration of the electric hammer main body is avoided.
Drawings
Fig. 1 is a schematic structural diagram of an appearance of the embodiment of the present invention.
FIG. 2 is a schematic structural view of a first shock absorbing assembly according to an embodiment of the present invention.
FIG. 3 is a schematic structural view of a second shock absorbing assembly according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a single coil spring structure according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of a front handle according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a shock attenuation electric hammer, including electric hammer main part 1, set up at the back handle 2 of electric hammer main part 1 rear end, set up at the front handle 3 of electric hammer main part 1 front end, characterized by:
referring to fig. 1 and 2, the front upper end of the rear handle 2 is connected with the rear upper end of the electric hammer main body 1 through a first damping assembly 4, and the first damping assembly 4 comprises a first U-shaped seat 8, a first connecting rod 9, a first pin shaft 10, a first rubber gasket 11, a first nut 12, a first spring 13 and a first corrugated elastic sleeve 14; the first U-shaped seat 8 is fixed at the rear upper end of the electric hammer main body 1, a first U-shaped slot 15 is formed in the first U-shaped seat 8, a slot opening of the first U-shaped slot 15 is vertical, and a first through hole 16 is formed in the first U-shaped slot 15; a first inserting plate 17 is arranged at the front end of the first connecting rod 9, the first inserting plate 17 is matched with the first U-shaped slot 15, a first shaft hole 18 is formed in the first inserting plate 17, a first inserting rod 19 is arranged at the rear end of the first connecting rod 9, and the first inserting rod 19 can be inserted into the rear handle 2 and can stretch and slide in the rear handle 2; the first pin shaft 10 penetrates through the first through hole 16 and the first shaft hole 18 and is fixed on the first shaft hole 18, and external threads are arranged at two ends of the first pin shaft 10; the two first rubber gaskets 11 are respectively sleeved at two ends of the first pin shaft 10 in a penetrating way and are embedded on the first through hole 16; the two first nuts 12 are respectively screwed on the external threads at the two ends of the first pin shaft 10; the first spring 13 is sleeved on the first inserted link 19 in a penetrating way, one end of the first spring 13 is connected with the first connecting rod 9, and the other end is connected with the rear handle 2; the first corrugated elastic sleeve 14 wraps the first U-shaped seat 8 and the first connecting rod 9, one end of the first corrugated elastic sleeve 14 is connected with the electric hammer main body 1, and the other end of the first corrugated elastic sleeve is connected with the rear handle 2; the first damping component 4 is vertically and rotatably connected with the electric hammer main body 1, and the first rubber gasket 11, the first spring 13 and the first corrugated elastic sleeve 14 are used, so that the first damping component 4 has an obvious damping effect on vertical and front and back vibration;
referring to fig. 1 and 3, the front lower end of the rear handle 2 is connected with the rear lower end of the electric hammer main body 1 through a second damping assembly 5, and the second damping assembly 5 comprises a second U-shaped seat 20, a second connecting rod 21, a second pin 22, a second rubber washer 23, a second nut 24, a second spring 25 and a second corrugated elastic sleeve 26; the second U-shaped seat 20 is fixed at the rear lower end of the electric hammer main body 1, a second U-shaped slot 27 is formed in the second U-shaped seat 20, a notch of the second U-shaped slot 27 is transverse, and a second through hole 28 is formed in the second U-shaped slot 27; a second inserting plate 29 is arranged at the front end of the second connecting rod 21, the second inserting plate 29 is matched with the second U-shaped slot 27, a second shaft hole 30 is formed in the second inserting plate 29, a second inserting rod 31 is arranged at the rear end of the second connecting rod 21, and the second inserting rod 31 can be inserted into the rear handle 2 and can stretch and slide in the rear handle 2; the second pin shaft 22 penetrates through the second through hole 28 and the second shaft hole 30 and is fixed on the second shaft hole 30, and external threads are arranged at two ends of the second pin shaft 22; the two second rubber gaskets 23 are respectively sleeved at two ends of the second pin shaft 22 in a penetrating way and embedded in the second through hole 28; the number of the second nuts 24 is two, and the two second nuts are respectively screwed on the external threads at the two ends of the second pin shaft 22; the second spring 25 is sleeved on the second inserted link 31 in a penetrating manner, one end of the second spring 25 is connected with the second connecting rod 21, and the other end of the second spring is connected with the rear handle 2; the second U-shaped seat 20 and the second connecting rod 21 are wrapped by the second corrugated elastic sleeve 26, one end of the second corrugated elastic sleeve 26 is connected with the electric hammer main body 1, and the other end of the second corrugated elastic sleeve 26 is connected with the rear handle 2; because the second damping component 5 is connected with the electric hammer main body 1 in a transverse rotating mode and the second rubber gasket 23, the second spring 25 and the second corrugated elastic sleeve 26 are used, the second damping component 5 has obvious damping effect on transverse and front and back vibration; the first damping component 4 and the second damping component 5 are matched with each other, so that the vibration of the electric hammer main body 1 in all directions can be effectively absorbed, and the vibration of the rear handle 2 is obviously reduced;
referring to fig. 1, 4 and 5, the front handle comprises a connecting piece 6, a core rod 35, an outer handle barrel 36, a plurality of coil springs 32, a liquid 37 and a third corrugated elastic sleeve 38; the connecting piece 6 is movably sleeved at the front end of the electric hammer main body 1; the core bar 35 is fixed on the connecting piece 6; the outer handle tube 36 wraps the core bar 35 and is not in direct contact with the core bar 35; the coil spring 32 is arranged in the outer handle barrel 36, a spring strip forming the coil spring 32 becomes thicker gradually from the inner end 34 to the outer end 33, so that the stiffness coefficient of the coil spring 32 becomes larger gradually from the inner end 34 to the outer end 33, the inner end 34 of the coil spring 32 is fixed on the side wall of the core rod 35, the outer end 33 of the coil spring 32 is fixed on the inner side wall of the outer handle barrel 36, contact points of the inner ends 34 of the coil springs 32 and the side wall of the core rod 35 are spirally and uniformly distributed, contact points of the outer ends 33 of the coil springs 32 and the inner side wall of the outer handle barrel 36 are spirally and uniformly distributed, so that the core rod 35 is stressed uniformly, and the core rod 35 is positioned on the central axis of the outer handle barrel 36 under the action of uniform force; when the core rod 35 vibrates, the inner end 34 of the coil spring 32 connected with the core rod 35 is firstly caused to vibrate and gradually transmit to the outer end 33, and because the stiffness coefficient of the coil spring 32 is gradually increased from the inner end 34 to the outer end 33, the vibration is gradually attenuated from the inner end 34 to the outer end 33, so that the outer handle barrel 36 connected with the outer end 33 of the coil spring 32 hardly vibrates; the liquid 37 is filled in the outer handle cylinder 36, and the liquid 37 can play a role in damping the transmission of vibration; the third corrugated elastic sleeve 38 is sleeved on the upper end of the core rod 35 in a penetrating mode, the upper end of the third corrugated elastic sleeve 38 is connected with the core rod 35 in a sealing mode, the lower end of the third corrugated elastic sleeve 38 is connected with the upper end of the outer handle barrel 36 in a sealing mode, the third corrugated elastic sleeve 38 plays a role in sealing the liquid 37, and meanwhile the damping effect is achieved for the transmission of vibration.
Further, the first rubber gasket 10 and the second rubber gasket 22 are both gear-shaped.
Furthermore, the rear handle 2 and the front handle 3 are both provided with anti-skid grains 7.
Claims (3)
1. The utility model provides a shock attenuation electric hammer, includes the electric hammer main part, sets up at the back handle of electric hammer main part rear end, sets up the preceding handle at electric hammer main part front end, characterized by:
the front upper end of the rear handle is connected with the rear upper end of the electric hammer main body through a first shock absorption assembly, and the first shock absorption assembly comprises a first U-shaped seat, a first connecting rod, a first pin shaft, a first rubber gasket, a first nut, a first spring and a first corrugated elastic sleeve; the first U-shaped seat is fixed at the rear upper end of the electric hammer main body, a first U-shaped slot is formed in the first U-shaped seat, a notch of the first U-shaped slot is vertical, and a first through hole is formed in the first U-shaped slot; the front end of the first connecting rod is provided with a first inserting plate, the first inserting plate is matched with the first U-shaped slot, the first inserting plate is provided with a first shaft hole, the rear end of the first connecting rod is provided with a first inserting rod, and the first inserting rod can be inserted into the rear handle and can stretch and slide in the rear handle; the first pin shaft penetrates through the first through hole and the first shaft hole and is fixed on the first shaft hole, and external threads are arranged at two ends of the first pin shaft; the two first rubber gaskets are respectively sleeved at two ends of the first pin shaft in a penetrating way and embedded on the first penetrating hole; the two first nuts are respectively screwed on the external threads at the two ends of the first pin shaft; the first spring is sleeved on the first inserting rod in a penetrating mode, one end of the first spring is connected with the first connecting rod, and the other end of the first spring is connected with the rear handle; the first corrugated elastic sleeve wraps the first U-shaped seat and the first connecting rod, one end of the first corrugated elastic sleeve is connected with the electric hammer main body, and the other end of the first corrugated elastic sleeve is connected with the rear handle;
the front lower end of the rear handle is connected with the rear lower end of the electric hammer main body through a second shock absorption assembly, and the second shock absorption assembly comprises a second U-shaped seat, a second connecting rod, a second pin shaft, a second rubber washer, a second nut, a second spring and a second corrugated elastic sleeve; the second U-shaped seat is fixed at the rear lower end of the electric hammer main body, a second U-shaped slot is formed in the second U-shaped seat, a notch of the second U-shaped slot is transverse, and a second through hole is formed in the second U-shaped slot; a second inserting plate is arranged at the front end of the second connecting rod and matched with the second U-shaped slot, a second shaft hole is formed in the second inserting plate, and a second inserting rod is arranged at the rear end of the second connecting rod and can be inserted into the rear handle and can stretch and slide in the rear handle; the second pin shaft penetrates through the second through hole and the second shaft hole and is fixed on the second shaft hole, and external threads are arranged at two ends of the second pin shaft; the two second rubber gaskets are respectively sleeved at two ends of the second pin shaft in a penetrating way and embedded in the second through hole; the two second nuts are respectively screwed on the external threads at the two ends of the second pin shaft; the second spring is sleeved on the second inserted link in a penetrating manner, one end of the second spring is connected with the second connecting rod, and the other end of the second spring is connected with the rear handle; the second U-shaped seat and the second connecting rod are wrapped by the second corrugated elastic sleeve, one end of the second corrugated elastic sleeve is connected with the electric hammer main body, and the other end of the second corrugated elastic sleeve is connected with the rear handle;
the front handle comprises a connecting piece, a core bar, an outer handle tube, a plurality of coil springs, liquid and a third corrugated elastic sleeve; the connecting piece is movably sleeved at the front end of the electric hammer main body; the core bar is fixed on the connecting piece; the outer handle barrel wraps the core rod and is not in direct contact with the core rod; the coil spring is arranged in the outer handle barrel, a spring strip forming the coil spring becomes thicker gradually from the inner end to the outer end, so that the stiffness coefficient of the coil spring becomes larger gradually from the inner end to the outer end, the inner end of the coil spring is fixed on the side wall of the core rod, the outer end of the coil spring is fixed on the inner side wall of the outer handle barrel, contact points of the inner ends of the coil springs and the side wall of the core rod are uniformly distributed in a spiral direction, contact points of the outer ends of the coil springs and the inner side wall of the outer handle barrel are uniformly distributed in the spiral direction, so that the stress of the core rod is balanced, and the core rod is positioned on the central axis of the outer handle barrel under the action of the balanced force; the liquid is filled in the outer handle cylinder, and the liquid can play a damping role in the transmission of vibration; the third ripple elastic sleeve is sleeved at the upper end of the core rod in a penetrating mode, the upper end of the third ripple elastic sleeve is connected with the core rod in a sealing mode, the lower end of the third ripple elastic sleeve is connected with the upper end of the outer handle cylinder in a sealing mode, the third ripple elastic sleeve plays a role in sealing liquid, and meanwhile plays a role in damping vibration transmission.
2. A shock absorbing electric hammer as set forth in claim 1, wherein: the first rubber gasket and the second rubber gasket are both in a gear shape.
3. A shock absorbing electric hammer as set forth in claim 1, wherein: the rear handle and the front handle are both provided with anti-skid lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810944221.2A CN109333459B (en) | 2018-08-18 | 2018-08-18 | Shock attenuation electric hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810944221.2A CN109333459B (en) | 2018-08-18 | 2018-08-18 | Shock attenuation electric hammer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109333459A CN109333459A (en) | 2019-02-15 |
| CN109333459B true CN109333459B (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810944221.2A Active CN109333459B (en) | 2018-08-18 | 2018-08-18 | Shock attenuation electric hammer |
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| CN (1) | CN109333459B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1820903A (en) * | 2005-02-18 | 2006-08-23 | 罗伯特·博世有限公司 | Hand-held machine tool |
| CN201586964U (en) * | 2009-10-29 | 2010-09-22 | 浙江恒友机电有限公司 | Handle shock-absorbing structure used in electric hammer or hammer drill |
| CN101925440A (en) * | 2008-01-25 | 2010-12-22 | 罗伯特.博世有限公司 | Handheld power tool, in particular electrically driven handheld power tool |
| EP2415562A2 (en) * | 2010-08-05 | 2012-02-08 | Black & Decker Inc. | Rear handle |
| CN202292684U (en) * | 2011-09-16 | 2012-07-04 | 楼其榜 | Vibration-damping electric hammer and electric pickax |
| CN104227663A (en) * | 2013-06-20 | 2014-12-24 | 力山工业股份有限公司 | Automatic mallet with damping device |
| CN204308922U (en) * | 2014-12-23 | 2015-05-06 | 浙江博大实业有限公司 | Portable multifunctional electric hammer |
| CN205889070U (en) * | 2016-07-19 | 2017-01-18 | 福建惠安县坚固电机有限公司 | Shock attenuation electric hammer and electric pick |
-
2018
- 2018-08-18 CN CN201810944221.2A patent/CN109333459B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1820903A (en) * | 2005-02-18 | 2006-08-23 | 罗伯特·博世有限公司 | Hand-held machine tool |
| CN101925440A (en) * | 2008-01-25 | 2010-12-22 | 罗伯特.博世有限公司 | Handheld power tool, in particular electrically driven handheld power tool |
| CN201586964U (en) * | 2009-10-29 | 2010-09-22 | 浙江恒友机电有限公司 | Handle shock-absorbing structure used in electric hammer or hammer drill |
| EP2415562A2 (en) * | 2010-08-05 | 2012-02-08 | Black & Decker Inc. | Rear handle |
| CN202292684U (en) * | 2011-09-16 | 2012-07-04 | 楼其榜 | Vibration-damping electric hammer and electric pickax |
| CN104227663A (en) * | 2013-06-20 | 2014-12-24 | 力山工业股份有限公司 | Automatic mallet with damping device |
| CN204308922U (en) * | 2014-12-23 | 2015-05-06 | 浙江博大实业有限公司 | Portable multifunctional electric hammer |
| CN205889070U (en) * | 2016-07-19 | 2017-01-18 | 福建惠安县坚固电机有限公司 | Shock attenuation electric hammer and electric pick |
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| Publication number | Publication date |
|---|---|
| CN109333459A (en) | 2019-02-15 |
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Effective date of registration: 20210729 Address after: No. 577, Huajie West Avenue, Huajie Town, Yongkang City, Jinhua City, Zhejiang Province 321000 Applicant after: ZHEJIANG XINPU INDUSTRY AND TRADE Co.,Ltd. Address before: 476000 lianghao family home, Suiyang District, Shangqiu City, Henan Province Applicant before: Heng Yuzhen |
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