CN201990418U - Anti-overwinding switch - Google Patents
Anti-overwinding switch Download PDFInfo
- Publication number
- CN201990418U CN201990418U CN2011200981517U CN201120098151U CN201990418U CN 201990418 U CN201990418 U CN 201990418U CN 2011200981517 U CN2011200981517 U CN 2011200981517U CN 201120098151 U CN201120098151 U CN 201120098151U CN 201990418 U CN201990418 U CN 201990418U
- Authority
- CN
- China
- Prior art keywords
- switch
- spring
- overwinding
- micro
- pull bar
- 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 - Fee Related
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- Switch Cases, Indication, And Locking (AREA)
- Tumbler Switches (AREA)
Abstract
The utility model discloses an anti-overwinding switch, which comprises a casing. A spring holder with a spring inside is arranged in the casing, a pull rod is mounted in the spring holder and positioned below the spring, a micro switch is arranged on the upper portion of the spring holder, and a connecting mechanism for being connected with a counter weight is arranged at the lower end of the pull rod. The anti-overwinding switch is characterized in that a nylon sleeve and a rubber sleeve which have the function of sealing are fixed to the bottom of the micro switch. The anti-overwinding switch is much improved in service life and operational stability.
Description
Technical field
The utility model is special in weight-lifting equipment, can be widely used on various car hosits, crawler crane, port and pier hoisting crane and other weight-lifting equipments.Be that a kind of lifting altitude restriction is that the winch steel rope prevents the pulleying switch.
Background technology
The overwinding-proof switch housing that uses on the present domestic crane generally adopts non-metal shell; and degree of protection is generally all lower; because the crane working environment is more abominable; the switch long term exposure outside; therefore shell occurs through regular meeting when switch uses and damage on hoisting crane, and waterproof badly can cause the switch contact oxidation, contact bad.Thereby bring certain potential safety hazard to hoisting crane.The utility model mainly is at some above-mentioned major defects and outdoor bad working environment and design-calculated.
The utility model content
The purpose of this utility model provides a kind of improved overwinding-proof switch, and it is all having greatly improved aspect service life and the working stability.
The technical solution of the utility model is:
The overwinding-proof switch comprises housing, is provided with the spring perch that is built-in with spring in housing; Pull bar also is contained among the spring perch, is positioned at the bottom of spring; Spring perch top is provided with micro-switch; The bottom of pull bar is provided with and is used for and weight bonded assembly bindiny mechanism.Nylon jacket that seals and rubber coating are fixed on the bottom of micro-switch.
Positive progressive effect of the present utility model is simple in structure, low cost of manufacture, and water resistance has increased nylon jacket and rubber coating except that traditional lead line outlet and cover plate for sealing at the pull bar motion parts, and anti-sealing enters from this.Therefore even also can be reliably in abominable external environment condition, trouble free service.Overcome the potential safety hazard that hoisting crane brings because of switch is unreliable.
Description of drawings
Fig. 1 is the utility model structural representation-front view;
Fig. 2 is the left view of Fig. 1.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment 1:
The utility model is made up of housing 1, spring perch 3, spring, pull bar 6, nylon jacket 5, rubber coating 4, micro-switch 2 etc.Spring, pull bar 6 all are contained in the spring perch 3, and spring perch 3 is screwed in the housing 1, and micro-switch 2 is fixed in the housing 1.Nylon jacket 5, rubber coating 4 are fixed on micro-switch 2 bottoms, seal, and anti-sealing enters from this.The elastic force that the weight 7 that links to each other with pull bar 6 during the hoisting crane normal operation makes pull bar 6 overcome spring moves downward, micro-switch 2 is in free state, switch is exported one group of normally closed (or often opening) switching value signal, when suspension hook rises to desired end position, suspension hook holds up weight, spring makes the pull bar upward movement, backs down micro-switch and makes the switching value state of output that opposite variation take place, and cuts off the action of dangerous direction by circuit, hydraulic efficiency pressure system.
For making its work more reliable, degree of protection adopts IP65.
Because the metal case that adopts is therefore just to have avoided non-metal shell to damage because of the shell that wears out or collision causes, thereby adopt the degree of protection of IP65 can more effectively prevent that the switch inner contact from contacting defectives such as bad because of the oxidation of making moist causes the contact.
Claims (1)
1. the overwinding-proof switch comprises housing, is provided with the spring perch that is built-in with spring in housing; Pull bar also is contained among the spring perch, is positioned at the bottom of spring; Spring perch top is provided with micro-switch; The bottom of pull bar is provided with and is used for and weight bonded assembly bindiny mechanism, it is characterized in that the bottom that the nylon jacket that seals and rubber coating are fixed on micro-switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200981517U CN201990418U (en) | 2011-04-07 | 2011-04-07 | Anti-overwinding switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200981517U CN201990418U (en) | 2011-04-07 | 2011-04-07 | Anti-overwinding switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201990418U true CN201990418U (en) | 2011-09-28 |
Family
ID=44666912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200981517U Expired - Fee Related CN201990418U (en) | 2011-04-07 | 2011-04-07 | Anti-overwinding switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201990418U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787219A (en) * | 2014-02-08 | 2014-05-14 | 山河智能装备股份有限公司 | Over-wind protection device for hoisting |
| CN109534199A (en) * | 2018-12-07 | 2019-03-29 | 湖南考思特电子有限公司 | The multi-functional Anti-overwinding switch of backplate type |
-
2011
- 2011-04-07 CN CN2011200981517U patent/CN201990418U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787219A (en) * | 2014-02-08 | 2014-05-14 | 山河智能装备股份有限公司 | Over-wind protection device for hoisting |
| CN109534199A (en) * | 2018-12-07 | 2019-03-29 | 湖南考思特电子有限公司 | The multi-functional Anti-overwinding switch of backplate type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hunan Huicheng Control System Co., Ltd. Assignor: Li Huiyuan Contract record no.: 2014430000109 Denomination of utility model: Limited heavy hammer for crane anti-overwinding switch Granted publication date: 20110928 License type: Exclusive License Record date: 20140625 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20180407 |