CN2826066Y - Friction clutch for centrifugal electric and pneumatic tool - Google Patents
Friction clutch for centrifugal electric and pneumatic tool Download PDFInfo
- Publication number
- CN2826066Y CN2826066Y CN 200520072250 CN200520072250U CN2826066Y CN 2826066 Y CN2826066 Y CN 2826066Y CN 200520072250 CN200520072250 CN 200520072250 CN 200520072250 U CN200520072250 U CN 200520072250U CN 2826066 Y CN2826066 Y CN 2826066Y
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- brake pad
- friction
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- seat
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Abstract
The utility model discloses a friction clutch for a centrifugal electric and pneumatic tool, which is a two sheet disk type friction clutch which adopts materials which are used by automobile friction sheets without asbestos materials as friction sheet materials of the utility model. In addition, the utility model makes use of centrifugal force which is generated when a friction block rotates to carry out radial friction with an outer shell of a clutch to transfer torque, and the friction block does straight-line motion in a guiding groove of a seat. A shaft hole of the seat is connected with a shaft of a motor, and the outer shell of the clutch is connected with an operating mechanism of an electric tool and is a bridge between the motor and the operating mechanism. When the clutch operates, the utility model has stable running, small friction coefficient, wear resistant performance and heat resistant performance. When the utility model is combined, the utility model has the advantages of large transferring torque and no impact force, when the utility model is separated, the motor is protected. The utility model is suitable for the protection of motors of various portable electric tools. In addition, the utility model also provides guarantee for the safe operation of electric tools.
Description
Affiliated technical field
The utility model relates to electronic, the air tool clutch of a kind of hand-held type.
Background technique
At present, clutch electronic, pneumatic wrench adopts jaw clutch more, and is slow from, resultant velocity, bump is arranged, and can not protect motor immediately.The hand-held type electric tools of the overwhelming majority all do not adopt clutch device, though adopted clutch also exist function singleness, mechanism is unreasonable, the transmitting torque loss is big defective etc.
Summary of the invention
In order to overcome above-mentioned defective, the utility model provides a kind of centrifugal electric instrument friction clutch, and this centrifugal electric instrument friction clutch can in time be protected power plant when operation (comprise safety) and energy-conservation safely, and pursuit does not have impact soon from, resultant velocity.
The utility model for the technological scheme that solves its technical problem and adopt is: a kind of centrifugal electric, pneumatic tool friction clutch mainly are made of parts such as seat, first brake pad, second brake pad, first friction plate, second friction plate, first extension spring, second extension spring, clutch outer members;
The center of described seat is provided with the axis hole that is connected with pto, and the two ends of described seat form projection respectively, and described protruding both sides form lateral protrusions respectively;
Described first and second brake pad is the semicircle disc type, is setting in opposite directions, described seat is located between described first and second brake pad, be respectively equipped with the guiding groove and the side direction guiding groove that are complementary with described seat two ends projection and lateral protrusions in described first and second brake pad in the middle of the circle, the projection and the described lateral protrusions at described seat two ends are movably placed in respectively in the guiding groove and side direction guiding groove of described first and second brake pad, and described first and second brake pad can only be done reciprocating linear motion in one direction;
Described first and second friction plate is the circular arc sheet, and described first and second friction plate is individually fixed in described first and second brake pad surface;
The two ends of described first extension spring are individually fixed in a side of described first and second brake pad, the two ends of described second extension spring are individually fixed in the opposite side of described first and second brake pad, when rotating speed descends, make described first and second brake pad move to seat in opposite directions, reset rapidly away from clutch outer member;
Described clutch outer member, the one side is the open circles ring-type, opposite side be hexagonal bar-shaped, be used for giving the electric tool working portion with transmission of power, described seat, first brake pad, second brake pad, first friction plate, second friction plate, first extension spring, second extension spring place respectively in the annulus opening of described clutch outer member one side, by described first friction plate, second friction plate and described annulus inboard from, close the cut-out, the transmission that realize frictional power.
It is friction material that described first and second friction plate adopts no asbestos material, uses High Temperature High Pressure to be bonded on the brake pad.
Be provided with first, second, third and fourth straight pin, the two ends of described first and second extension spring are connected in the both sides of described first and second brake pad respectively by first, second, third and fourth straight pin.
Be provided with the 5th, six, seven, eight straight pins again, the termination, both sides of described seat is respectively equipped with projection, the circle side is respectively equipped with four notches for the movable turnover of projection in described first and second brake pad corresponding with projection, be inserted with described the 5th, six, seven, eight straight pins in described four notches respectively, be used for the operating range of limiting friction piece.
The beneficial effects of the utility model are: the axis hole of seat is connected with motor output shaft during use, clutch outer member (being clutch end) is connected with the operation mechanism of electric tool, the centrifugal force that utilizes first and second brake pad to produce when rotated carries out radial friction with the shell of clutch or separates, thereby reaches transmitting torque or cut off torsion; The guiding groove of first and second brake pad and side direction guiding groove be respectively along the projection and the lateral protrusions moving linearly of seat, and mechanism's running is steadily like this, friction factor is little, therefore from, close reliable rapidly; Again rubbing surface can account for external diameter surface long-pending 85%, from, close and do not have that to impact the moment of torsion that transmits big; Adopt no asbestos material friction material as friction plate material of the present utility model again, first and second friction plate uses High Temperature High Pressure to be bonded in antiwear heat resisting on first and second brake pad respectively, friction factor＜0.37 in the time of 300 ℃; After the utility model is used in electric tool, in case electric tool is the excessive rotating speed of load moment of descending stall will taking place at work, first, two brake pads separate immediately with the shell inboard under the effect of two extension springs, motor is in the uncharge idling conditions, immediately avoided of the impact of big electric current to motor, protected motor to play energy-conservation purpose again, the countertorque that simultaneously can also decompose the impact type electric driven instrument, after making the electric tool that countertorque is arranged originally use the utility model, the imperceptible at all existence that countertorque is arranged of operator helps safety in production, rotating speed recovers normally under action of centrifugal force first, two friction plates are opened again and are carried out transmitting torque; In addition: the size of clutch diameter influences the size of power such as motor and output power again, therefore can reach object of energy saving.
Description of drawings
Below in conjunction with drawings and embodiments the utility model is further described in detail;
Fig. 1 is an assembling explosive view of the present utility model;
Fig. 2 is first brake pad described in the utility model and first friction plate stereogram after bonding;
Fig. 3 is an assembling longitudinal sectional drawing of the present utility model;
Fig. 4 is the assembling relationship figure of seat of the present utility model and first and second brake pad.
Among the figure: 11. first friction plates; 12. second friction plate; 21. first brake pad; 22. second brake pad; 31. first extension spring; 32. first extension spring; The seat; 5. shell; 61. first straight pin; 62. second straight pin; 63. three cylindrical pin; 64. the 4th straight pin; 65. the 5th straight pin; 66. the 6th straight pin; 67. the 7th straight pin; 68. the 8th straight pin; 41. projection; 42. lateral protrusions; 43. projection; 71. guiding groove; 72. side direction guiding groove; 73. notch; 44. axis hole.
Embodiment
Embodiment: a kind of centrifugal electric, pneumatic tool friction clutch mainly are made of parts such as seat, first brake pad 21, second brake pad 22, first friction plate 11, second friction plate 12, first extension spring 31, second extension spring 32, clutch outer members 5;
The center of described seat 4 is provided with the axis hole 44 that is connected with pto, and the two ends of described seat form projection 41 respectively, and described protruding both sides form lateral protrusions 42 respectively;
Described first and second brake pad is the semicircle disc type, is setting in opposite directions, described seat is located between described first and second brake pad, be respectively equipped with the guiding groove 71 and the side direction guiding groove 72 that are complementary with described seat two ends projection and lateral protrusions in described first and second brake pad in the middle of the circle, the projection and the described lateral protrusions at described seat two ends are movably placed in respectively in the guiding groove and side direction guiding groove of described first and second brake pad, and described first and second brake pad can only be done reciprocating linear motion in one direction;
Described first and second friction plate is the circular arc sheet, and described first and second friction plate is individually fixed in described first and second brake pad surface;
The two ends of described first extension spring 31 are individually fixed in a side of described first and second brake pad, the two ends of described second extension spring 32 are individually fixed in the opposite side of described first and second brake pad, when rotating speed descends, make described first and second brake pad move to seat in opposite directions, reset rapidly away from clutch outer member;
Described clutch outer member 5, the one side is the open circles ring-type, opposite side be hexagonal bar-shaped, be used for giving the electric tool working portion with transmission of power, described seat, first brake pad, second brake pad, first friction plate, second friction plate, first extension spring, second extension spring place respectively in the annulus opening of described clutch outer member one side, by described first friction plate, second friction plate and described annulus inboard from, close the cut-out, the transmission that realize frictional power.
It is friction material that described first and second friction plate adopts no asbestos material, uses High Temperature High Pressure to be bonded on the brake pad.
Be provided with first, second, third and fourth straight pin 61,62,63,64, the two ends of described first and second extension spring are connected in the both sides of described first and second brake pad respectively by first, second, third and fourth straight pin.
Be provided with the 5th, six, seven, eight straight pins 65,66,67,68 again, the termination, both sides of described seat is respectively equipped with projection 43, the circle side is respectively equipped with four notches 73 for projection 43 movable turnover in described first and second brake pad corresponding with projection, be inserted with described the 5th, six, seven, eight straight pins in described four notches respectively, be used for the operating range of limiting friction piece.
Working principle of the present utility model is: after power transmits by the seat intermediate shaft hole, bi-side by seat pass to first and second brake pad, high speed rotating, first and second brake pad is under action of centrifugal force, instantaneous first and second extension spring pretightening force arranged, extrapolated by first and second friction plate and the shell transmitting torque that rubs along projection, the lateral protrusions of seat both sides, the hexagonal by shell partly passes to the electric tool working portion again.When rotating speed descends under the effect of first and second extension spring first and second brake pad reset rapidly, reach and cut off transmission of power and make motor idle running, the effect of protection motor.
First and second brake pad is two disk structures, and the centre cuts out in half of hexagonal has guiding groove, side direction guiding groove to limit the rotational freedom of first and second brake pad respectively, and first and second brake pad can only be done reciprocating linear motion in one direction.
The structure of seat, it is based on hexagon, after closing up, hexagon and first and second piece brake pad just in time mate (see figure 4), the projection at hexagon seat two ends, lateral protrusions part then match with guiding groove, the side direction guiding groove of first and second brake pad and limit the rotational freedom of first and second brake pad, and first and second brake pad can only be done reciprocating linear motion in one direction.
First and second friction plate adopts no asbestos material friction plate material, and first and second friction plate uses High Temperature High Pressure to be bonded in respectively on first and second brake pad.Bonding firmly, rubbing surface account for external diameter surface long-pending 85%,, the moment of torsion of transmission is big, uses this material can make from, fashionable nothing simultaneously and impacts, and is wear-resisting and be easy to heat radiation, friction factor＜0.37 in the time of 300 ℃.
Use eight straight pins altogether, four straight pins are used for and being connected of first and second extension spring, and are pressed into respectively in four notches of first and second brake pad when four straight pins then in the end assemble in addition, are used to limit the operating range of first and second brake pad.
Claims (4)
1. a centrifugal electric, pneumatic tool friction clutch is characterized in that: mainly be made of seat, first brake pad, second brake pad, first friction plate, second friction plate, first extension spring, second extension spring, clutch outer member;
The center of described seat is provided with the axis hole that is connected with pto, and the two ends of described seat form projection respectively, and described protruding both sides form lateral protrusions respectively;
Described first and second brake pad is the semicircle disc type, is setting in opposite directions, described seat is located between described first and second brake pad, be respectively equipped with the guiding groove and the side direction guiding groove that are complementary with described seat two ends projection and lateral protrusions in described first and second brake pad in the middle of the circle, the projection and the described lateral protrusions at described seat two ends are movably placed in respectively in the guiding groove and side direction guiding groove of described first and second brake pad, and described first and second brake pad can only be done reciprocating linear motion in one direction;
Described first and second friction plate is the circular arc sheet, and described first and second friction plate is individually fixed in described first and second brake pad surface;
The two ends of described first extension spring are individually fixed in a side of described first and second brake pad, the two ends of described second extension spring are individually fixed in the opposite side of described first and second brake pad, when rotating speed descends, make described first and second brake pad move to seat in opposite directions, reset rapidly away from clutch outer member;
Described clutch outer member, the one side is the open circles ring-type, opposite side be hexagonal bar-shaped, be used for giving the electric tool working portion with transmission of power, described seat, first brake pad, second brake pad, first friction plate, second friction plate, first extension spring, second extension spring place respectively in the annulus opening of described clutch outer member one side, by described first friction plate, second friction plate and described annulus inboard from, close the cut-out, the transmission that realize frictional power.
2. centrifugal electric according to claim 1, pneumatic tool friction clutch is characterized in that: it is friction material that described first and second friction plate adopts no asbestos material, uses High Temperature High Pressure to be bonded on the brake pad.
3. centrifugal electric according to claim 1, pneumatic tool friction clutch, it is characterized in that: be provided with first, second, third and fourth straight pin, the two ends of described first and second extension spring are connected in the both sides of described first and second brake pad respectively by first, second, third and fourth straight pin.
4. centrifugal electric according to claim 1, pneumatic tool friction clutch, it is characterized in that: be provided with the 5th, six, seven, eight straight pins again, the termination, both sides of described seat is respectively equipped with projection, the circle side is respectively equipped with four notches for the movable turnover of projection in described first and second brake pad corresponding with projection, be inserted with described the 5th, six, seven, eight straight pins in described four notches respectively, be used for the operating range of limiting friction piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072250 CN2826066Y (en) | 2005-05-30 | 2005-05-30 | Friction clutch for centrifugal electric and pneumatic tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072250 CN2826066Y (en) | 2005-05-30 | 2005-05-30 | Friction clutch for centrifugal electric and pneumatic tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826066Y true CN2826066Y (en) | 2006-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520072250 Expired - Fee Related CN2826066Y (en) | 2005-05-30 | 2005-05-30 | Friction clutch for centrifugal electric and pneumatic tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2826066Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279251A (en) * | 2014-09-25 | 2015-01-14 | 芜湖市中亚汽车制动元件有限公司 | Clutch |
| CN110273934A (en) * | 2018-03-16 | 2019-09-24 | 天佑电器（苏州）有限公司 | Clutch and electric tool, garden instrument and food refuse disposer with it |
| CN110273934B (en) * | 2018-03-16 | 2024-05-10 | 天佑电器（苏州）有限公司 | Clutch and electric tool, garden tool and food waste disposer with same |
-
2005
- 2005-05-30 CN CN 200520072250 patent/CN2826066Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279251A (en) * | 2014-09-25 | 2015-01-14 | 芜湖市中亚汽车制动元件有限公司 | Clutch |
| CN110273934A (en) * | 2018-03-16 | 2019-09-24 | 天佑电器（苏州）有限公司 | Clutch and electric tool, garden instrument and food refuse disposer with it |
| CN110273934B (en) * | 2018-03-16 | 2024-05-10 | 天佑电器（苏州）有限公司 | Clutch and electric tool, garden tool and food waste disposer with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |