CN101452787A - Rolling fork type operating device for travel switch - Google Patents
Rolling fork type operating device for travel switch Download PDFInfo
- Publication number
- CN101452787A CN101452787A CNA200710171286XA CN200710171286A CN101452787A CN 101452787 A CN101452787 A CN 101452787A CN A200710171286X A CNA200710171286X A CN A200710171286XA CN 200710171286 A CN200710171286 A CN 200710171286A CN 101452787 A CN101452787 A CN 101452787A
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- China
- Prior art keywords
- travel switch
- cam
- roller
- fork type
- type actuator
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Abstract
The invention relates to a rolling fork type actuator for a travel switch, which comprises a shell, a transmission mechanism and a push rod, wherein the transmission mechanism comprises a rotating shaft with a rotating arm and a cam with an irregular section, the cam is sleeved at the head end of the rotating shaft, the cam and the rotating shaft are in tight fit, the head end is positioned above the push rod, the upper end of the push rod is provided with an axial groove, a roller is fixed in the groove through a pin shaft and is engaged with the cam, and the cam is provided with a protuberance part positioned at the left upper part of the cam. Compared with the prior art, the actuator has the advantages of compact structure, stable performance, reliable work, and long service life.
Description
Technical field
The present invention relates to the actuating of travel switch, particularly relate to a kind of rolling fork type actuator that is used for travel switch.
Background technology
Travel switch can be transformed into electrical signal with mechanical movement, is used for controlling mechanical action or program control, therefore is used widely in control system.Exist the operating characteristics instability in actual applications, defective such as it is unreliable to work.Because defencive function is perfect not to the utmost, on-the-spot abnormal running causes mechanism's clamping stagnation, and the malfunctioning fault that causes of moving happens occasionally.
Summary of the invention
Technical problem to be solved by this invention is exactly to provide a kind of rolling fork type actuator that is used for travel switch for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions: a kind of rolling fork type actuator that is used for travel switch, it is characterized in that, comprise housing, transmission mechanism, push rod, described transmission mechanism comprises the irregular cam in rotating shaft, cross section of being with pivoted arm, described cam is sheathed on the head end of rotating shaft, both tight fits, this head end is positioned at the top of push rod, the upper end of described push rod offers axial groove, fix a roller by bearing pin in this groove, this roller and cam meshing close, and described cam is provided with and is positioned at its upper left protuberance.
Described transmission mechanism also comprises the strutting piece of being close to inner walls, this strutting piece is positioned at the top of rotating shaft head end, a roller is fixed by bearing pin in its lower end, and this roller and cam meshing close, and is provided with spring between the inner walls of the upper end of described strutting piece and its top.
The lower end of described push rod also is provided with axial screw, and this screw internal fixation has adjustment screw, and tightly touch mutually the header planes of this adjustment screw and the operating side of travel switch.
Described pivoted arm is the fork-shaped pivoted arm, by the bearing pin riveting one group of roller is arranged on it.
Described roller is two, and two-wheeled is all preceding.
Described roller is two, and revolver is preceding, right wheel after.
Described roller is two, revolver after, right wheel is preceding.
Compared with prior art, compact conformation of the present invention, stable performance, reliable operation, long service life.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is A-A cutaway view of Fig. 1.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, 2, a kind of rolling fork type actuator that is used for travel switch, comprise housing 1, transmission mechanism, push rod 2, described transmission mechanism comprises the irregular cam 4 in rotating shaft 3, the cross section of being with pivoted arm, described cam 4 is sheathed on the head end of rotating shaft 3, both tight fits, this head end is positioned at the top of push rod 2, the upper end of described push rod 2 offers axial groove, fix a roller 5 by bearing pin in this groove, this roller 5 is meshed with cam 4, and described cam is provided with and is positioned at its upper left protuberance 11.
Described transmission mechanism also comprises the strutting piece of being close to inner walls 6, this strutting piece 6 is positioned at the top of rotating shaft head end, a roller 7 is fixed by bearing pin in its lower end, and this roller 7 is meshed with cam 4, is provided with spring 8 between the inner walls of the upper end of described strutting piece 6 and its top; The lower end of described push rod 2 also is provided with axial screw, and this screw internal fixation has adjustment screw 9, and tightly touch mutually the operating side of the header planes of this adjustment screw 9 and travel switch 10; Described pivoted arm is the fork-shaped pivoted arm, by the bearing pin riveting one group of roller is arranged on it; Described roller is two, the position have three kinds available, two-wheeled is all preceding; Perhaps revolver is preceding, right wheel after; Perhaps revolver after, right wheel is preceding. Roller 5,7 all can rotate around bearing pin.
Push rod axially reciprocatingly slides with transmission mechanism, and its stroke is restricted by the camming movement track.
After moving machinery touched the roller of the rolling fork type actuator that is used for travel switch, active force passed to push rod by the cam in the rotating shaft, and the pull switch element makes contact closure or disconnection, reached the purpose of control.
The rolling fork type actuator that is used for travel switch of the present invention has limit function.The position-limit mechanism of forming by cam and housing inner arm with the Stroke Control of push rod in the impulse stroke limit that switch element allows, realize automatically spacing, thereby improved the reliability of work.
The cam that is used for the rolling fork type actuator of travel switch of the present invention is provided with the counter-force buffer protection of roller belts guiding, therefore makes mechanism's work very steady; Owing to adopt rolling structure, the friction of motion resistance is little, has prolonged useful life simultaneously.
The rolling fork type actuator that is used for travel switch of the present invention can effectively overcome the impulsive force that protection test is born, or the misoperation that produces at work.
Claims (7)
1. rolling fork type actuator that is used for travel switch, it is characterized in that, comprise housing, transmission mechanism, push rod, described transmission mechanism comprises the irregular cam in rotating shaft, cross section of being with pivoted arm, and described cam is sheathed on the head end of rotating shaft, both tight fits, this head end is positioned at the top of push rod, and the upper end of described push rod offers axial groove, fixes a roller by bearing pin in this groove, this roller and cam meshing close, and described cam is provided with and is positioned at its upper left protuberance.
2. a kind of rolling fork type actuator that is used for travel switch according to claim 1, it is characterized in that, described transmission mechanism also comprises the strutting piece of being close to inner walls, this strutting piece is positioned at the top of rotating shaft head end, a roller is fixed by bearing pin in its lower end, this roller and cam meshing close, and are provided with spring between the inner walls of the upper end of described strutting piece and its top.
3. a kind of rolling fork type actuator that is used for travel switch according to claim 1 and 2, it is characterized in that, the lower end of described push rod also is provided with axial screw, and this screw internal fixation has adjustment screw, and tightly touch mutually the header planes of this adjustment screw and the operating side of travel switch.
4. a kind of rolling fork type actuator that is used for travel switch according to claim 3 is characterized in that described pivoted arm is the fork-shaped pivoted arm, by the bearing pin riveting one group of roller is arranged on it.
5. a kind of rolling fork type actuator that is used for travel switch according to claim 4 is characterized in that described roller is two, and two-wheeled is all preceding.
6. a kind of rolling fork type actuator that is used for travel switch according to claim 4 is characterized in that described roller is two, and revolver is preceding, right wheel after.
7. a kind of rolling fork type actuator that is used for travel switch according to claim 4 is characterized in that described roller is two, revolver after, right wheel is preceding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710171286XA CN101452787A (en) | 2007-11-29 | 2007-11-29 | Rolling fork type operating device for travel switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710171286XA CN101452787A (en) | 2007-11-29 | 2007-11-29 | Rolling fork type operating device for travel switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101452787A true CN101452787A (en) | 2009-06-10 |
Family
ID=40734962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710171286XA Pending CN101452787A (en) | 2007-11-29 | 2007-11-29 | Rolling fork type operating device for travel switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101452787A (en) |
-
2007
- 2007-11-29 CN CNA200710171286XA patent/CN101452787A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090610 |