CN202384189U - Novel Limit switch - Google Patents
Novel Limit switch Download PDFInfo
- Publication number
- CN202384189U CN202384189U CN2011204691763U CN201120469176U CN202384189U CN 202384189 U CN202384189 U CN 202384189U CN 2011204691763 U CN2011204691763 U CN 2011204691763U CN 201120469176 U CN201120469176 U CN 201120469176U CN 202384189 U CN202384189 U CN 202384189U
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- Prior art keywords
- switch
- limit switch
- collision
- permanent magnet
- arm
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- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
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- 229910052734 helium Inorganic materials 0.000 description 1
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Abstract
The utility model relates to an electric appliance switch, especially to a novel limit switch, composed of a mechanical limit detecting element, a non-contact type electrical switch element and a shell. The novel limit switch is characterized in that the mechanical limit detecting element is a collision arm with a spring-type unstable balance mechanism, the non-contact type electrical switch element is a reed switch controlled by a permanent magnet, and the permanent magnet is fixed on a rotating arm connected with the rotating shaft of the collision arm. By using the novel limit switch of the utility model, the problem can be solved that the electrical part service life and the mechanical part service life of the conventional limit switch do not match; the novel limit switch is equipped with normally open contacts and also normally-closed contacts, enables the number of contacts to be added or reduced according to demands, and is strong in flexibility; by employing the adjustable spring-type unstable balance mechanism and guaranteeing the accuracy and reliability of a positioning signal at the same time, the novel limit switch can provide the collision reset type switch and automatic reset type switch two work modes, is simple in structure, convenient in installation, reliable in work, long in service life and strong in adaptability.
Description
Technical field
The utility model relates to a kind of appliance switch, relates in particular to a kind of novel limit switch that is applicable to that object moves on the qualification position of its movement locus or precalculated position.
Background technology
The application of limit switch on mobile device is quite general; Generally be used for sending after mobile device puts in place the corresponding signal that puts in place to prevent that equipment is offside or to take other action measure; The reliability of limit switch signal is directly connected to normal operation and the production and the device security of equipment; Therefore, its working condition receives much attention always.Because process requirements, this spacing action is generally very frequent, and this kind switch is broadly divided into mechanical action part and electrical contact mechanism two parts.Mechanical collision action part and can are generally the cast iron structure; The effective action number of times is more; And electrical contact mechanism is generally the organic plastics support, is easy to wearing and tearing, and its effective action number of times is far smaller than mechanical part; So, depend on the effective action number of times of electric part contact mechanism the useful life of this kind limit switch.In addition, the polymer cam structure is adopted in the collision angle switching mechanism of most of limit switch of using now, and this mechanism is easy to wearing and tearing, causes the collision arm operating angle not enough after mechanism is worn, thereby makes switching signal malfunctioning, and then cause more production accident.
China's utility model patent " magnetic limit switch " (Chinese patent number: ZL89203553.6; Granted publication number: CN2074497) disclose a kind of technical scheme near the formula inductive switch; Comprise Sensor section and power amplifying part, adopt magnetic induction principle, when permanent magnet during near tongue tube; Directly the adhesive reed switch contact amplifies the break-make control that realizes external circuits through electronic power.If this mode is used in the environment of large-scale open-air machine work, be difficult to obtain accurately induced signal, and in installation and use, change original mounting means and partial circuit, make troubles to The field.In addition, because the normally opened contact and the normally-closed contact of this contrast patent can not have both, and the contact number can not expand, and is difficult to satisfy on-the-spot requirement of actual application usually.
The utility model content
The purpose of the utility model is to design a kind of novel limit switch; In the electric part life-span and mechanical part life-span mismatch problem that solve existing limit switch; The equipment signal that puts in place can be provided accurately and reliably, thereby effectively prevent the generation of the offside accident of equipment.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
A kind of novel limit switch is provided; Form by mechanical position limitation detecting element and contactless electric switch element and shell; It is characterized in that; Described mechanical position limitation detecting element is the collision arm that has spring unstable equilibrium mechanism, and described contactless electric switch element is the tongue tube of permanent magnet control, and permanent magnet is fixed on the turning arm that is connected with the rotating shaft of collision arm.
A kind of preferable technical scheme of the novel limit switch of the utility model is that described electric switch element comprises 1 group of normally opened contact and 1 group of normally-closed contact at least.
The further improved technical scheme of the novel limit switch of the utility model is that the spring fitting device of said spring unstable equilibrium mechanism is an adjustable structure, has collision homing position type switch and automatically resets two kinds of mode of operations of formula switch.
The beneficial effect of the utility model is: the mechanical position limitation detecting element of the utility model limit switch and contactless electric switch element structure can solve the electric part life-span and the mechanical part life-span mismatch problem of existing limit switch; Improve the action frequency of switch greatly; Prolong the replacement cycle of limit switch; For equipment control and maintenance are provided convenience, thereby practice thrift equipment cost; This novel limit switch normally opened contact normally-closed contact has both, and can increase or reduce the number of contact according to actual needs again, and flexibility is strong; The utility model limit switch adopts adjustable spring unstable equilibrium mechanism; Can be in the accuracy of guaranteeing framing signal and reliability; Collision homing position type switch is provided and automatically resets two kinds of mode of operations of formula switch, advantage such as have simple in structure, easy for installation, reliable operation, the life-span is long, adaptability is strong.
Description of drawings
Fig. 1 is the structural representation of tongue tube,
Fig. 2 is the sketch map of the contact closure condition of tongue tube,
Fig. 3 is the structural representation of novel limit switch first stable state of the utility model,
Fig. 4 is the structural representation of the novel limit switch collision arm of the utility model,
Fig. 5 is the sketch map of the novel limit switch transition position state of the utility model,
Fig. 6 is the collision arm position view of the novel limit switch transition position state of the utility model,
Fig. 7 is the sketch map of novel limit switch second stable state of the utility model,
Fig. 8 is the formula that the automatically resets structural representation of the novel limit switch of the utility model,
The label of each parts in more than scheming: 1-reed, 2-reed, 3-sealed tube, 4-can; The 5-spring fitting device, 6-tongue tube, 7-tongue tube, 8-tongue tube mounting groove; 9-magnet, 10-magnet, 11-extension spring, 12-collision arm; 13-rotating shaft, 14-bump the arm limited bolt, 15-L type cursor.
Embodiment
In order to understand the technique scheme of the utility model better, be explained in further detail below in conjunction with accompanying drawing and embodiment.
Tongue tube is a magnetic switch commonly used on a kind of electric equipment, comprises two or three reed contacts in the tongue tube usually, is encapsulated in 3 li of sealed tubes that are filled with inert gas (like nitrogen, helium etc.) or vacuum, and is as shown in Figure 1.The reed 1 of parallel encapsulation in the sealed tube and the tip side of reed 2 are overlapping, leave certain interval or are in contact with one another the normally opened contact or the normally-closed contact of formation switch.The reed 1 that constitutes normally opened contact and reed 2 are made by not only magnetic conduction but also the material that conducts electricity, and when permanent magnet during near tongue tube, reed 1 will induce opposite polarity magnetic pole with reed 2.Because pole polarity attracts each other mutually on the contrary, when the magnetic force that attracts surpassed the drag of reed, the reed 1 that separates and reed 2 just can adhesives, and be as shown in Figure 2.When permanent magnet leaves tongue tube, when magnetic force was reduced to certain value, reed 1 returned to initial off-state again with reed 2 under the effect of reed drag, realizes the effect of magnetic switch thus.Dry reed-pipe structure is compact, weight is little, can be installed in the extremely limited space.Because the switch contact of tongue tube is hermetically sealed within the inert gas atmosphere, can be because of not causing loose contact with the corrosion of external environment catalytic oxidation; Tongue tube does not adopt sliding members, so the fatigue of materials phenomenon can not occur, guarantees in fact almost limitless mechanical useful life.The technical scheme of the utility model is exactly that the non-contact control tongue tube, the characteristic of nothing machinery wearing and tearing combine the novel limit switch of composition with the collision arm structure that has spring unstable equilibrium mechanism of existing machinery formula limit switch.
The utility model first embodiment of novel limit switch be out that one closes collision homing position type switch mode of operation, its structure such as Fig. 3 and shown in Figure 4.The limit switch of present embodiment has two kinds of stable states, and first stable state is free position, and second stable state is a working position, realizes the conversion of working position and free position by collision.In the present embodiment, when working position or free position, a closing of contact is arranged respectively, a contact is broken off.The mechanical position limitation detecting element of limit switch is a collision arm 12, and permanent magnet 9 and permanent magnet 10 are fixed on the two ends of L type cursor 15, and cursor 15 rotates with the rotating shaft 13 of collision arm 12.When switch was in free position, coil tension spring 11 was in reset mode, collision arm 12 the pulling force of coil tension spring 11 with bump under the restriction of arm limited bolt 14, be in stable equilibrium position, constitute first stable state of limit switch.Under this state, permanent magnet 9 is near tongue tube 6, and tongue tube 6 is closed under the effect of permanent magnet 9, as the normally-closed contact of first stable state, this road circuit is connected; Permanent magnet 10 is in the position away from tongue tube 7, and tongue tube 7 is in off-state, constitutes the normally opened contact of first stable state, and this road circuit is broken off.
When collision arm 12 receives the collision of external impact retaining head and when moving; 13 on rotating shaft can rotate under the drive of collision arm, and switch then becomes transition position (like Fig. 5 and shown in Figure 6) by free position, and this moment, permanent magnet 9 left tongue tube 6; Tongue tube 6 breaks off; Permanent magnet 10 is also near tongue tube 7, tongue tube 7 adhesive not yet, and this moment, the two-way circuit all broke off.When being in the transition position; Bump arm limited bolt 14 and be in the centre position between 12 liang of arms of collision arm; Lose limit function; Coil tension spring 11 energy storage that is stretched makes the transition position become the unstable equilibrium state, and collision arm 12 hits in the retaining butt and can cross the transition position very soon under the effect with self inertia and turn to working position.
After switch collision arm 12 forwards working position to by the transition position (as shown in Figure 7); Coil tension spring 11 retracted for clearance,, collision arm 12 the pulling force of coil tension spring 11 with bump under the restriction of arm limited bolt 14; Be in stable equilibrium position, constitute second stable state of limit switch.Permanent magnet 9 is away from tongue tube 6 at this moment, and tongue tube 6 is in off-state, constitutes the normally opened contact of second stable state, and this road circuit is broken off.And corresponding permanent magnet 10 makes tongue tube 7 be in closure state near tongue tube 7, as the normally-closed contact of second stable state, this road circuit is connected.
The reseting procedure and the course of work of switch are in the opposite direction, and outer collision retaining head drive collision arm 12 moves and reset.In the entire work process; Outer collision retaining impact force state that disequilibrates, the reliable transition of leaning on the flexible completion poised state of coil tension spring guarantees the putting in place of the anglec of rotation of rotating shaft; It is approaching and accomplish the break-make of circuit away from tongue tube to lean on rotating shaft to drive motion permanent magnet down; Lean on magnetic field to accomplish the coupling of mechanical mechanism and electrical contact, this contactless coupled modes have been avoided the wearing and tearing of touch switch polymer support with the action cam, have improved the action frequency of switch greatly.
First embodiment of the novel limit switch of the utility model comprises 1 group of normally opened contact and 1 group of normally-closed contact; Form by tongue tube 6 and tongue tube 7; As the tongue tube of normally opened contact and normally-closed contact place respectively can 4 inner about in two tongue tube mounting grooves 8, the contact leads of each tongue tube is drawn out to can 4 through wiring hole outside is connected with external equipment.Therefore, only need to increase or reduce the tongue tube quantity in the tongue tube mounting groove 8, just can increase or reduce the number of normally opened contact or normally-closed contact neatly according to the needs of on-the-spot working control.
The lower end of the coil tension spring 11 of first embodiment of the novel limit switch of the utility model is fixed on the can; The upper end of coil tension spring 11 is fixed on rotating shaft 13 through spring fitting device 5, realizes having the collision homing position type switch mode of operation of two stable states.Second embodiment of the novel limit switch of the utility model changes spring fitting device 5 into adjustable connected mode with the mode that is fixedly connected between the rotating shaft 13; The angle between the arm of force and the collision arm 12 that receives through adjustment spring fitting device 5; Make an arm that receives fixed permanent magnet 10 on the arm of force and the L type cursor 15 of rotating spring fixture 5 parallel; As shown in Figure 8, the novel limit switch of the utility model just becomes the switch of the formula that automatically resets of having only a kind of stable state.When switch was in initial condition, coil tension spring 11 was a reset mode, and collision arm 12 is in stable equilibrium position, and permanent magnet 9 is near tongue tube 6, and tongue tube 6 is closed under the effect of permanent magnet 9, as the normally-closed contact of stable state, this road circuit was connected; Permanent magnet 10 is in the position away from tongue tube 7, and tongue tube 7 is in off-state, constitutes the normally opened contact of stable state, and this road circuit is broken off.When collision arm 12 receives the collision of external impact retaining head and when moving; 13 on rotating shaft can rotate under the drive of collision arm, and permanent magnet 9 is away from tongue tube 6, and tongue tube 6 is in off-state; Permanent magnet 10 makes tongue tube 7 be in closure state near tongue tube 7.Simultaneously, coil tension spring 11 energy storage that is stretched, switch is in the unstable equilibrium state.When external impact retaining head leaves collision arm 12, L type cursor 15, permanent magnet 9 and permanent magnet 10 automatically revert to the incipient stability equilbrium position under the pulling force of coil tension spring 11, tongue tube 6 closures, and tongue tube 7 breaks off, and limit switch automatically resets.The switch of formula does not need reset operation owing to automatically reset, and collision arm 12 changes I shape single armed structure into by the V-arrangement arm structure.
Those of ordinary skill in the art will be appreciated that; Above embodiment only is the technical scheme that is used for explaining the utility model; And be not the qualification that is used as the utility model; Any based on connotation of the present invention to variation, modification that the above embodiment did, all will drop in the protection range of claim of the present invention.
Claims (3)
1. novel limit switch; Form by mechanical position limitation detecting element and contactless electric switch element and shell; It is characterized in that; Described mechanical position limitation detecting element is the collision arm that has spring unstable equilibrium mechanism, and described contactless electric switch element is the tongue tube of permanent magnet control, and permanent magnet is fixed on the turning arm that is connected with the rotating shaft of collision arm.
2. the described limit switch of claim 1, described contactless electric switch element comprises 1 group of normally opened contact and 1 group of normally-closed contact at least.
3. the described limit switch of claim 1, the spring fitting device of said spring unstable equilibrium mechanism is an adjustable structure, has collision homing position type switch and automatically resets two kinds of mode of operations of formula switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204691763U CN202384189U (en) | 2011-11-23 | 2011-11-23 | Novel Limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204691763U CN202384189U (en) | 2011-11-23 | 2011-11-23 | Novel Limit switch |
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| Publication Number | Publication Date |
|---|---|
| CN202384189U true CN202384189U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204691763U Expired - Fee Related CN202384189U (en) | 2011-11-23 | 2011-11-23 | Novel Limit switch |
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| CN (1) | CN202384189U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617913A (en) * | 2013-12-05 | 2014-03-05 | 顾星 | Waterproof switch |
| CN104422427A (en) * | 2013-08-19 | 2015-03-18 | 中国科学院沈阳自动化研究所 | Mechanical switch-type depth sensor |
| CN105244213A (en) * | 2015-11-25 | 2016-01-13 | 国家电网公司 | Disconnecting link with cutter location detection device |
| WO2017092510A1 (en) * | 2015-12-01 | 2017-06-08 | 武汉普林光通科技有限公司 | Triggering structure for electronic lock, electronic lock and triggering method thereof |
| CN110010401A (en) * | 2019-04-18 | 2019-07-12 | 合肥德通科贸有限公司 | A kind of convenient and fast handle component of operation |
| CN110503988A (en) * | 2019-07-12 | 2019-11-26 | 成都皮兆永存科技有限公司 | Data storage device |
| TWI727561B (en) * | 2019-12-23 | 2021-05-11 | 環名興業有限公司 | Switching magnetic reed detector |
-
2011
- 2011-11-23 CN CN2011204691763U patent/CN202384189U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422427A (en) * | 2013-08-19 | 2015-03-18 | 中国科学院沈阳自动化研究所 | Mechanical switch-type depth sensor |
| CN104422427B (en) * | 2013-08-19 | 2016-08-10 | 中国科学院沈阳自动化研究所 | A mechanical switch type depth sensor |
| CN103617913A (en) * | 2013-12-05 | 2014-03-05 | 顾星 | Waterproof switch |
| CN103617913B (en) * | 2013-12-05 | 2015-07-22 | 顾星 | Waterproof switch |
| CN105244213A (en) * | 2015-11-25 | 2016-01-13 | 国家电网公司 | Disconnecting link with cutter location detection device |
| WO2017092510A1 (en) * | 2015-12-01 | 2017-06-08 | 武汉普林光通科技有限公司 | Triggering structure for electronic lock, electronic lock and triggering method thereof |
| CN110010401A (en) * | 2019-04-18 | 2019-07-12 | 合肥德通科贸有限公司 | A kind of convenient and fast handle component of operation |
| CN110010401B (en) * | 2019-04-18 | 2024-09-13 | 合肥德通科贸有限公司 | Handle component convenient to operate |
| CN110503988A (en) * | 2019-07-12 | 2019-11-26 | 成都皮兆永存科技有限公司 | Data storage device |
| TWI727561B (en) * | 2019-12-23 | 2021-05-11 | 環名興業有限公司 | Switching magnetic reed detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20161123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |