CN201262913Y - Safety guyrope switch - Google Patents
Safety guyrope switch Download PDFInfo
- Publication number
- CN201262913Y CN201262913Y CNU2008201457349U CN200820145734U CN201262913Y CN 201262913 Y CN201262913 Y CN 201262913Y CN U2008201457349 U CNU2008201457349 U CN U2008201457349U CN 200820145734 U CN200820145734 U CN 200820145734U CN 201262913 Y CN201262913 Y CN 201262913Y
- Authority
- CN
- China
- Prior art keywords
- housing
- moving contact
- travel switch
- necking part
- pull
- 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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Abstract
The utility model discloses a safe pull-cord switch, which comprises a housing, a pull axis and a pre-pulling spring, wherein, the top of the housing forms a through hole, and the pull axis penetrates through the through hole; one end of the pull axis exposed out of the housing forms a pull head which is connected with a pull cord; while the other end of the pull axis forms a step part which has a larger diameter and the step part is provided with a necking part; the pre-pulling spring is sleeved on the pull axis and one end of the pre-pulling spring is fixedly arranged on the inner wall of the housing, while the other end thereof is clamped at the step part; and the lateral surface of the housing corresponding to the necking part is provided with a punch hole, the moving contact of a travel switch generates a relative displacement with the necking part through the punch hole, and when the apex angle of the moving contact is positioned in the necking part, the travel switch is under a normal condition. The tension in the structure bears no relation to the size of the movement of the travel switch, thus bringing little wear to the travel switch, and having long service life and wide application range.
Description
Technical field
The utility model relates to the pull switch class device in the industrial electrical equipment.
Background technology
At some metallurgy, the mine, cement, electric power, in the industrial production of industry such as harbour affairs and chemical industry, often use some transmission conveying appliance transmission materials, as growing apart from belt conveyor, machine for zipper, scraper plate machine and chain bucket conveyer etc., because the transmission line of conveying device is long, often run into obstruction, card changes, overload, belt creep, sideslip, tear, equipment faults such as off-axis cause serious consequence, even jeopardize the post worker, the operative employee, check man's safety, thereby need the staff to make an inspection tour, the staff is in the tour process as the arbitrary place that finds transmission line when fortuitous event occurring, need go to control room or far field control button place removes to handle control switch faulty equipment is stopped, spended time is bound to, enlarge fault, cause more serious equipment fault and personal safety (belt feeder belt speed 1.4 meter per seconds).
At present, on the stay cord of conveyer or assembling line, generally all install pull switch class device, can be according to the pulling force of stay cord and length variation abnormality and the actuating length switch, as urgent trouble-saving safety measure.Yet, the present pull switch that generally uses, the direction of stay cord is designed to identical with the direction of action of travel switch, thereby the size of pulling force directly can have influence on the action force of travel switch, and during equipment fault, pulling force generally can be bigger, to the serious wear of travel switch, influence its useful life; On the other hand, when pulling force excessive, when stay cord is broken, because existing pull switch does not have auto-lock function, therefore travel switch is very easily replied under the effect of back-moving spring, makes circuit reconnect, and starts working, yet this moment, fault was not perhaps got rid of, and made breakdown loss further increase.
In view of above-mentioned defective, the inventor concentrates on studies at the structure of pull switch, and this case produces thus.
The utility model content
Main purpose of the present utility model is to provide a kind of safe pull switch, and the action size of its pulling force and travel switch is irrelevant, and is little to the wearing and tearing that travel switch causes, and long service life is applied widely.
Secondary objective of the present utility model is to provide a kind of safe pull switch, and it has auto-lock function, improves system works stability.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of safe pull switch comprises housing, pulling shaft and prestretching spring; One through hole is formed on the top of housing, and pulling shaft runs through this through hole; The end that pulling shaft exposes housing is formed with the pull head that is connected with stay cord; The other end of pulling shaft forms the bigger rank portion of diameter, and rank portion has necking part; The prestretching spring housing is located on the pulling shaft, and the one end is fixedly installed on inner walls, and the other end is fastened on rank portion; The position of the corresponding necking part in the side of housing begins that perforation is arranged, and the moving contact of travel switch produces relative displacement via perforation and necking part, and the drift angle of moving contact is when being arranged in necking part, and travel switch is in conventional state.
The vertical moving contact of the sagittal plane of above-mentioned housing also forms a spacing hole, and one passes this spacing hole from the lock section, and with the drift angle clip of moving contact, the restriction moving contact is near the displacement of necking part.
After adopting such scheme, the utility model is designed to vertical direction with the action force of pulling force and travel switch, and the size of pulling force and the action force of travel switch are irrelevant, therefore can freely design the size of pulling force, and can travel switch not caused damage, prolong its useful life.
On the other hand, the utility model is provided with one from the lock section by increase, when pulling force is excessive when causing stay cord to disconnect because spacing from the lock section, from the lock section to the frictional force of moving contact greater than travel switch in the elastic force of back-moving spring, make the moving contact can't return, thereby circuit still can not worked, and gets rid of up to the fault of equipment, is manually unpluged from the lock section by the technical staff again, moving contact is replied, and travel switch reenters conventional state.
Description of drawings
Fig. 1 is a perspective exploded view of the present utility model;
Fig. 2 is the assembled sectional view of the utility model when the pretension state;
Fig. 3 is the partial sectional view of Fig. 2 when overlooking;
Fig. 4 is the assembled sectional view of the utility model when stay cord is lax;
Fig. 5 is the combination appearance figure of the utility model when overlooking;
Fig. 6 is the assembled sectional view of the utility model when stay cord is strained;
Fig. 7 is the partial sectional view of Fig. 6 when overlooking.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1, a kind of safe pull switch of the utility model comprises housing 17, pulling shaft 8 and prestretching spring 10.
In the present embodiment, housing 17 is for being the form of " L " type, and its top in vertical part is formed with an axial through hole 171, and forms a perforation 172 at the right flank of horizontal edge.
Through hole 171, one ends that pulling shaft 8 runs through on the housing 17 expose outside housing 17, and are formed with pull head 13 at this end, and pull head 13 is connected with stay cord, can drive pulling shaft 8 interlock together under the draw of stay cord; The other end of pulling shaft 8 forms rank portion 81, and the diameter of this rank portion 81 is greater than the diameter of pulling shaft 8 bodies, and rank portion 81 also has necking part 82.
Prestretching spring 10 is set on the pulling shaft 8, and an end is fixedly installed on the inwall of housing 17, and the other end is fastened on the rank portion 81 of pulling shaft 8, and then prestretching spring 10 makes pulling shaft 8 have trend away from through hole 171 when being compressed.
During the utility model work, at first as shown in Figure 2, housing 17 and the travel switch that connected 1 is fixing, again stay cord is fixedlyed connected with pull head 13, adjust the degree of tightness of stay cord, cooperate the elastic force of prestretching spring 10, the drift angle of moving contact 4 is in the necking part 82 just, be the pretension position, this moment, travel switch 1 was in conventional state, the circuit communication operate as normal of follow-up connection.
When stay cord relaxes owing to equipment fault or disconnects, stay cord reduces the pulling force of pull head 13 even is zero, this moment is because the elastic-restoring force of prestretching spring 10, driving pulling shaft 8 moves to the direction away from through hole 171, the necking part 82 at rank portion 81 places produces relative displacement with the drift angle of moving contact 4, necking part 82 moves down along drift angle, lean moving contact 4 gradually, force moving contact to be walked for 4 times, until the rank portion 81 of drift angle arrival pulling shaft 8, the electric contact that drives travel switch 1 converts unconventional on off state to, as shown in Figure 4, this moment, travel switch 1 control circuit disconnected, and waited for technical staff's checkout equipment, fixed a breakdown.
When the stay cord tension, drive pulling shaft 8 by pull head 13 and walk to last time, the same surface analysis also can force moving contact to be walked for 4 times, and the electric contact that drives travel switch 1 converts unconventional on off state to, as shown in Figure 6, circuit is disconnected, and waits for maintenance.
In order further to improve functional reliability of the present utility model, present embodiment also in housing 17 front of horizontal edge one spacing hole 173 is set, this spacing hole 173 is corresponding with moving contact 4,6 drift angles that pass spacing hole 173 and moving contact 4 form clip from the lock section, as shown in Figure 5, play the effect of self-locking.Specifically, when pulling shaft 8 is in the pretension position, with reference to shown in Figure 3, from the lock section 6 with moving contact 4 against, can not influence the relative displacement of moving contact 4 and necking part 82 this moment; And when the stay cord tension, pulling shaft 8 was walked to last time, force moving contact to be walked for 4 times, this moment from the lock section 6 along the conical surface of moving contact 4 to lower slider, form clip with moving contact 4, the elasticity that overcomes back-moving spring sheathed on the moving contact 43 is stretched power, stop moving contact 4 to make travel switch 1 be in unconventional on off state all the time to the displacement of necking part 82 directions, until technical staff's remover apparatus fault, manually unplug from the lock section 6, the elastic-restoring force of back-moving spring 3 promotes moving contact 4 and reenters necking part 82, and transmission conveying appliance begins normal operation.
In sum, the utility model safety pull switch, focus on the action force of pulling force and travel switch 1 is designed to vertical direction, like this, the action force of the size of pulling force and travel switch 1 is irrelevant, when controlling, stay cord pulling pulling shaft 8 only need overcome clip power very little between necking part 82 and the moving contact 4, and promptly may command travel switch 1 changes operating state, therefore can not cause damage, prolong its useful life the moving contact 4 of travel switch 1; Simultaneously, also can change the control action of the size of pulling force to travel switch 1, thereby can select different springs according to actual working environment by changing the coefficient of elasticity of prestretching spring 10, applicability is wider, and is easy to use.Above embodiment only is explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every according to the technological thought that the utility model proposes, any change of being done on the technical scheme basis all falls within the utility model protection range.
Claims (2)
1, a kind of safe pull switch is characterized in that: comprise housing, pulling shaft and prestretching spring; One through hole is formed on the top of housing, and pulling shaft runs through this through hole; The end that pulling shaft exposes housing is formed with the pull head that is connected with stay cord; The other end of pulling shaft forms the bigger rank portion of diameter, and rank portion has necking part; The prestretching spring housing is located on the pulling shaft, and the one end is fixedly installed on inner walls, and the other end is fastened on rank portion; The position of the corresponding necking part in the side of housing begins that perforation is arranged, and the moving contact of travel switch produces relative displacement via perforation and necking part, and the drift angle of moving contact is when being arranged in necking part, and travel switch is in conventional state.
2, safe pull switch as claimed in claim 1 is characterized in that: the vertical moving contact of the sagittal plane of described housing also forms a spacing hole, and one passes this spacing hole from the lock section, and with the drift angle clip of moving contact, the restriction moving contact is near the displacement of necking part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201457349U CN201262913Y (en) | 2008-09-25 | 2008-09-25 | Safety guyrope switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201457349U CN201262913Y (en) | 2008-09-25 | 2008-09-25 | Safety guyrope switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201262913Y true CN201262913Y (en) | 2009-06-24 |
Family
ID=40809390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201457349U Expired - Fee Related CN201262913Y (en) | 2008-09-25 | 2008-09-25 | Safety guyrope switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201262913Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531394A (en) * | 2013-10-24 | 2014-01-22 | 田小兵 | Pull-cord switch |
| CN103745865A (en) * | 2014-01-14 | 2014-04-23 | 沈阳中煤工程技术有限公司 | Pull-cord switch with manual self-locking action mechanism |
| CN111494913A (en) * | 2020-04-30 | 2020-08-07 | 深圳市天步技术有限公司 | Device based on anaerobic apparatus tempers distance detection |
-
2008
- 2008-09-25 CN CNU2008201457349U patent/CN201262913Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531394A (en) * | 2013-10-24 | 2014-01-22 | 田小兵 | Pull-cord switch |
| CN103745865A (en) * | 2014-01-14 | 2014-04-23 | 沈阳中煤工程技术有限公司 | Pull-cord switch with manual self-locking action mechanism |
| CN111494913A (en) * | 2020-04-30 | 2020-08-07 | 深圳市天步技术有限公司 | Device based on anaerobic apparatus tempers distance detection |
| CN111494913B (en) * | 2020-04-30 | 2021-05-04 | 深圳市天步技术有限公司 | Device based on anaerobic apparatus tempers distance detection |
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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: 20090624 Termination date: 20150925 |
|
| EXPY | Termination of patent right or utility model |