CN2810907Y - Tripping device for overload protection of electric hammer - Google Patents
Tripping device for overload protection of electric hammer Download PDFInfo
- Publication number
- CN2810907Y CN2810907Y CN 200520012850 CN200520012850U CN2810907Y CN 2810907 Y CN2810907 Y CN 2810907Y CN 200520012850 CN200520012850 CN 200520012850 CN 200520012850 U CN200520012850 U CN 200520012850U CN 2810907 Y CN2810907 Y CN 2810907Y
- Authority
- CN
- China
- Prior art keywords
- clamping plate
- dropout
- shaft
- conical tooth
- travelling gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a kind of electric hammer overload protection trip gear, comprise awl tooth (1), be provided with bearing (3), travelling gear (8) and dropout clamping plate (10) on the conical tooth shaft of described awl tooth (1) successively, travelling gear (8) cooperates in the mode of freely rotating with conical tooth shaft, dropout clamping plate (10) cooperate in axially movable mode with conical tooth shaft, are provided with shaft block ring (9) on the conical tooth shaft in dropout clamping plate (10) outside; At least be provided with four installing holes on the described dropout clamping plate (10), be provided with dropout spring (5) and steel ball (4) in the installing hole, travelling gear (8) the clamping plate installing hole corresponding groove that is provided with and threads off, steel ball (4) and groove coupling; After adopting said structure, have advantages such as simple and reasonable, safe and reliable, easy to process, stable performance, production cost be low.
Description
Technical field
The utility model relates to a kind of protective device of electric tool, particularly a kind of trip gear of electric hammer overload protection.
Background technology
The design feature of electric hammer and the particularity of operation make it be widely used at building, construction field, because the unstability of environment for use, in use, the condition of work sudden change of electric hammer causes electric hammer overload or stall, can damage drive disk assembly when serious, even burn motor, in addition, the reaction force that produces during stall also is easy to hurt sb.'s feelings; For this reason, manufacturer exports at electric hammer power and all is provided with the overload protection trip gear between the drill bit.The present manufactured merchant extensively overload protection trip gear of utilization has two kinds; First kind is the structure of traditional wearing piece form, and its weak point is that uniformity is poor, and dropout moment is difficult to guarantee, reliability is bad, is difficult to return to original duty after once threading off, and causes failure of apparatus, the disabler that causes electric hammer to bore substantially brings inconvenience to the consumer; Second kind is the structure of gears to engage and disengage form, and this device use part is many, element precision requires height, processing difficulties, complex structure, and production cost obviously improves.
Summary of the invention
For overcoming the above-mentioned disadvantage that existing electric hammer overload protection trip gear exists, problem to be solved in the utility model provides a kind of simple in structure, safe and reliable, easy to process, stable performance, electric hammer overload protection trip gear that production cost is low.The technical scheme that its technical problem that solves the utility model adopts comprises the awl tooth, be provided with bearing, travelling gear and dropout clamping plate on the conical tooth shaft of described awl tooth successively, travelling gear cooperates in the mode of freely rotating with conical tooth shaft, the dropout clamping plate cooperate in axially movable mode with conical tooth shaft, are provided with shaft block ring on the conical tooth shaft in the dropout clamping plate outside; At least be provided with four installing holes on the described dropout clamping plate, be provided with dropout spring and steel ball in the installing hole, the travelling gear clamping plate installing hole corresponding groove that is provided with and threads off, steel ball and groove coupling.
Conical tooth shaft between described awl tooth and the bearing is provided with awl tooth packing ring.
The conical tooth shaft in the described shaft block ring outside is provided with the second road shaft block ring, is provided with the protection pad of threading off between two shaft block rings.
After adopting said structure, groove fit by steel ball and travelling gear, travelling gear drives the dropout clamping plate and rotates, the dropout clamping plate drive the awl tooth spiral by conical tooth shaft to be changeed, thereby realizes the transmission of power, when the moment of torsion of drill bit during greater than the power of travelling gear, skid between steel ball and the travelling gear and in groove, extrude, be reduced in the dropout clamping plate, thereby the effect of overload protection is played in the dropout of realization travelling gear and dropout clamping plate; After removing resistance, steel ball slips into again under the effect of dropout spring in the groove of travelling gear automatically, can resume work again; Have advantages such as simple and reasonable, safe and reliable, easy to process, stable performance, production cost be low.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model dropout clamping plate.
Fig. 3 is the schematic top plan view of Fig. 2.
The specific embodiment
Fig. 1 is to shown in Figure 3, specific embodiments for a kind of electric hammer overload protection of the invention trip gear, it comprises awl tooth 1, be provided with bearing 3, travelling gear 8 and dropout clamping plate 10 on the conical tooth shaft of described awl tooth 1 successively, travelling gear 8 cooperates in the mode of freely rotating with conical tooth shaft, dropout clamping plate 10 cooperate in axially movable mode with conical tooth shaft, are provided with shaft block ring 9 on the conical tooth shaft in dropout clamping plate 10 outsides; Preferably establish eight installing holes on the described dropout clamping plate 10, be provided with dropout spring 5 and steel ball 4 in the installing hole, the travelling gear 8 clamping plate installing hole corresponding groove that is provided with and threads off, steel ball 4 and groove coupling.Conical tooth shaft between described awl tooth 1 and the bearing 3 is provided with awl tooth packing ring 2.The conical tooth shaft in described shaft block ring 9 outsides is provided with the second road shaft block ring 11, between two shaft block rings 9,11, be provided with the protection pad 6 of threading off, can be when the reaction force of 5 pairs of dropout clamping plate 10 of dropout spring be excessive, prevent to cause shaft block ring 9 deformation failures, make the utility model safety and reliability in use.
Claims (3)
1, a kind of electric hammer overload protection trip gear, comprise awl tooth (1), it is characterized in that: be provided with bearing (3), travelling gear (8) and dropout clamping plate (10) on the conical tooth shaft of described awl tooth (1) successively, travelling gear (8) cooperates in the mode of freely rotating with conical tooth shaft, dropout clamping plate (10) cooperate in axially movable mode with conical tooth shaft, are provided with shaft block ring (9) on the conical tooth shaft in dropout clamping plate (10) outside; At least be provided with four installing holes on the described dropout clamping plate (10), be provided with dropout spring (5) and steel ball (4) in the installing hole, travelling gear (8) the clamping plate installing hole corresponding groove that is provided with and threads off, steel ball (4) and groove coupling.
2, electric hammer overload protection trip gear according to claim 1 is characterized in that: the conical tooth shaft between described awl tooth (1) and the bearing (3) is provided with awl tooth packing ring (2).
3, electric hammer overload protection trip gear according to claim 1 and 2 is characterized in that: the conical tooth shaft in described shaft block ring (9) outside is provided with the second road shaft block ring (11), is provided with the protection pad (6) of threading off between two shaft block rings (9,11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012850 CN2810907Y (en) | 2005-06-23 | 2005-06-23 | Tripping device for overload protection of electric hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012850 CN2810907Y (en) | 2005-06-23 | 2005-06-23 | Tripping device for overload protection of electric hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2810907Y true CN2810907Y (en) | 2006-08-30 |
Family
ID=36937292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520012850 Expired - Lifetime CN2810907Y (en) | 2005-06-23 | 2005-06-23 | Tripping device for overload protection of electric hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2810907Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813594A (en) * | 2012-08-08 | 2012-12-12 | 上海荣泰健身科技发展有限公司 | Machine core overload protection device used on massager |
| CN103644211A (en) * | 2013-11-21 | 2014-03-19 | 无锡睿网科技有限公司 | Clutch disc |
-
2005
- 2005-06-23 CN CN 200520012850 patent/CN2810907Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102813594A (en) * | 2012-08-08 | 2012-12-12 | 上海荣泰健身科技发展有限公司 | Machine core overload protection device used on massager |
| CN102813594B (en) * | 2012-08-08 | 2014-09-17 | 上海荣泰健身科技发展有限公司 | Machine core overload protection device used on massager |
| CN103644211A (en) * | 2013-11-21 | 2014-03-19 | 无锡睿网科技有限公司 | Clutch disc |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG HAIWANG ELECTRICAL APPLIANCE CO., LTD. Free format text: FORMER OWNER: WANG WENJIANG Effective date: 20100526 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 321200 HAIWANG ELECTRICAL APPLIANCE CO., LTD., NO.15, HUANCHENGDONG ROAD, BAIYANGDU INDUSTRY ZONE, WUYI COUNTRY,ZHEJIANG PROVINCE TO: 321200 NO.18 HUANGLONGSAN ROAD, HUANGLONG INDUSTRIAL DISTRICT, HUSHAN STREET, WUYI COUNTY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100526 Address after: Three road 321200 Zhejiang Huanglong County in Wuyi Province Hill Street Huanglong Industrial Zone No. 18 Patentee after: Zhejiang SKT Electric Machine Co., Ltd. Address before: 321200 Zhejiang County of Wuyi province baiyangdu Ring Road Industrial Zone No. 15 Haiwang Electric Co. Ltd. Patentee before: Wang Wenjiang |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150623 Granted publication date: 20060830 |