CN110634691B - Travel limit stop, travel limit device and equipment with travel limit device - Google Patents
Travel limit stop, travel limit device and equipment with travel limit device Download PDFInfo
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- CN110634691B CN110634691B CN201910986859.7A CN201910986859A CN110634691B CN 110634691 B CN110634691 B CN 110634691B CN 201910986859 A CN201910986859 A CN 201910986859A CN 110634691 B CN110634691 B CN 110634691B
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- 230000003116 impacting effect Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/16—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-levelling switch of a lift
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- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
The invention provides a travel limit stop, a travel limit device and equipment with the travel limit device. The device employs the travel limit stops. The device uses the apparatus. The invention can prolong the service life of the roller type travel switch and reduce the failure rate of mechanical equipment.
Description
Technical Field
The invention relates to the technical field of travel switches, in particular to a travel limit stop, a travel limit device using the travel limit stop and equipment using the travel limit device.
Background
In many machines with position sensing, roller travel switches are typically used to control the position of the moving parts, and the range of motion can be controlled to within a safe and effective range by the roller travel switches. The roller type travel switch is also called position switch or limit switch, it is a common low current master control electric appliance, it is mainly installed on the mechanical moving part, the mechanical moving direction or travel can be controlled by the contact action of the roller type travel switch, it changes the mechanical displacement into electric signal, the motor running state changes, thus limits the mechanical movement, realizes the safety protection, electric linkage or program control.
The conventional roller type travel switches can be classified into mechanical contact type roller type travel switches (direct-acting type, roller type and microswitch type) and non-contact type (photoelectric type and induction type) according to structures, wherein the single-roller type limit switch with the contact type roller type travel switch having the automatic reset function is widely applied. The structure principle of a roller type travel switch is shown in fig. 1, and the roller type travel switch comprises a roller 1, a rotating arm 2 and a return spring 3. When a limit stop on a controlled machine impacts a rotating arm 2 with a roller 1, the rotating arm 2 rotates, and when the rotating angle reaches a certain value, a normally closed contact of the roller type travel switch is opened, and a normally open contact of the roller type travel switch is closed. When the roller type travel switch leaves a certain distance from the limit stop, the rotating arm 2 is gradually restored to the original non-rotating state under the action of the return spring 3, and the contact of the roller type travel switch is also reset accordingly. The roller type travel switch often fails in application, that is, a roller of the roller type travel switch cannot break a control circuit after contacting a limiting block, and common faults are that the return spring of the roller type travel switch is weakened or even damaged. The roller type travel switch is connected with a moving part of mechanical equipment, not only plays roles of position detection and limiting by itself, but also can be completed by being matched with a limit stop. The damage of the roller type travel switch is related to the state of frequently colliding a limit stop and the mechanical motion itself, and the mechanical motion is often in the limit of two ends in practical application, such as the detection of the retraction and extension state of a hydraulic cylinder and the opening and closing of an electric door. Therefore, the working state of the roller type travel switch after collision with the limit stop needs to be adjusted, the service life of the roller type travel switch is prolonged, and the failure rate of mechanical equipment is reduced.
Disclosure of Invention
The invention aims to provide a travel limit stop block which can prolong the service life of a roller type travel switch and reduce the failure rate of mechanical equipment.
The second purpose of the invention is to provide a stroke limiting device which can prolong the service life of the roller type stroke switch and reduce the failure rate of mechanical equipment.
The invention aims to provide equipment with a stroke limiting device, which can prolong the service life of a roller type stroke switch and reduce the failure rate of mechanical equipment.
In order to achieve the first object, the invention provides a travel limit stop having a switch contacting portion, the switch contacting portion having a first impact inclined plane, a maintaining plane and a reset groove, wherein the first impact inclined plane, the maintaining plane and the reset groove are sequentially disposed on the same side of the switch contacting portion in a direction of the roller type travel switch impacting the travel limit stop.
According to the scheme, the travel limit stop disclosed by the invention has the advantages that the reset groove is formed, so that the roller type travel switch can be reset at the reset groove after the roller type travel switch impacts the first impact inclined plane to complete a switching task, the condition that the rotating arm cannot be restored to the original state due to the fact that the spring in the roller type travel switch is in a compressed state for a long time is changed, and the service life of the roller type travel switch is prolonged.
In a further scheme, the reset groove is provided with a second impact inclined plane, and the second impact inclined plane is arranged on one side, away from the first impact inclined plane, of the reset groove.
Therefore, the reset groove is provided with the second impact inclined plane, so that the roller type travel switch can complete the switching task by impacting the second impact inclined plane when the roller type travel switch cannot complete the switching task after impacting the first impact inclined plane, the reliable stop of the moving machine is realized, the reliability of the moving machine is improved, and the failure rate of mechanical equipment is reduced.
In a further scheme, in the direction that the roller type travel switch impacts the travel limit stop, the length of the first impact inclined surface is smaller than or equal to that of the second impact inclined surface.
Therefore, the length of the first impact inclined surface is less than or equal to that of the second impact inclined surface, so that when the second impact inclined surface is impacted, enough capacity is available for completing the switching task, and the moving machine can be reliably stopped.
In a further aspect, the second impact ramp is disposed at a first predetermined angle relative to the retaining plane.
Therefore, the second impact inclined plane and the maintaining plane are arranged at a first preset angle, and the inclination angle of the second impact inclined plane can be set according to the actual condition of the travel switch, so that the moving machine can be reliably stopped.
In a further scheme, the first impact inclined plane and the maintaining plane are arranged at a second preset angle.
Therefore, the first impact inclined plane and the maintaining plane are arranged at a second preset angle, and the inclination angle of the first impact inclined plane can be set according to the actual condition of the travel switch, so that the moving machine can be reliably stopped.
In order to achieve the second purpose, the travel limit device provided by the invention comprises a roller type travel switch and a travel limit stop, wherein the roller type travel switch and the travel limit stop are arranged in a matching way; the roller type travel switch is provided with a rotating arm and a return spring, and the rotating arm and the return spring are arranged in a matching way; the travel limit stop is provided with a switch contact part, the switch contact part is provided with a first impact inclined plane, a maintaining plane and a reset groove, and the first impact inclined plane, the maintaining plane and the reset groove are sequentially arranged on the same side of the switch contact part in the direction of the roller type travel switch impacting the travel limit stop.
According to the scheme, the travel limit stop block of the travel limit device is provided with the reset groove, so that the roller type travel switch can be reset at the reset groove after impacting the first impact inclined plane to complete a switching task, the problem that a rotating arm cannot be restored to an original state due to the fact that a spring in the roller type travel switch is in a compressed state for a long time is solved, and the service life of the roller type travel switch is prolonged.
In order to achieve the third object, the present invention provides a device having a travel limiting device, which is provided with the travel limiting device.
Drawings
Fig. 1 is a schematic structural view of a conventional roller type travel switch.
FIG. 2 is a schematic structural diagram of a roller type travel switch and a travel limit stop in an embodiment of the travel limit device of the present invention.
Fig. 3 is a structural view of a bump stopper in an embodiment of the bump stopper of the present invention.
Fig. 4 is a schematic diagram of the operation of a travel switch in an embodiment of the travel stop of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
As shown in fig. 2, the travel limit device of the present invention includes a roller type travel switch 10 and a travel limit stop 20, and the roller type travel switch 10 and the travel limit stop 20 are cooperatively disposed, wherein the travel limit stop 20 is made of a metal material, and preferably, the metal material includes an alloy material. The arrangement of the roller type position switch 10 and the position limit stopper 20 is well known to those skilled in the art and will not be described herein. The roller type travel switch 10 may be a conventional roller type travel switch, and the structure of the roller type travel switch is well known to those skilled in the art, and will not be described herein. In this embodiment, the roller type travel switch 10 is provided with a rotating arm 11 and a return spring 12, and the rotating arm 11 and the return spring 12 are cooperatively arranged.
Referring to fig. 3, the limit stop 20 is provided with a switch contact portion 21, the switch contact portion 21 is provided with a first striking slope 22, a maintaining plane 23 and a reset groove 24, and the first striking slope 22, the maintaining plane 23 and the reset groove 24 are sequentially disposed on the same side of the switch contact portion 21 in a direction in which the roller type limit switch 10 strikes the limit stop 20. The first striking slope 22 is used to rotate the rotating arm 11 when the rotating arm 11 of the roller type stroke switch 10 strikes the stroke limit stopper 20. The maintaining plane 23 is used to maintain a certain time after the rotation arm 11 is rotated to a certain angle. The reset groove 24 is used to reset when the swivel arm 11 travels to the reset groove 24. The direction in which the roller-type limit switch 10 strikes the limit travel stop 20 is the direction in which the roller-type limit switch 10 moves toward the limit travel stop 20.
The reset groove 24 is provided with a second striking ramp 25, the second striking ramp 25 being provided on the side of the reset groove 24 remote from the first striking ramp 22. In the direction in which the roller travel switch 10 strikes the travel limit stop 20, the length of the first striking slope 22 is less than or equal to the length of the second striking slope 25, and the length of the maintaining plane 23 is a predetermined length, which may be set as required by the control system or the commissioning position of the roller travel switch 10. The second striking ramp 25 is disposed at a first predetermined angle with respect to the retaining plane 23. The first striker ramp 22 is disposed at a second predetermined angle relative to the retaining plane 23. The first preset angle and the second preset angle may be set according to an effective rotation angle of the roller type travel switch 10, wherein the effective rotation angle is an angle at which the roller type travel switch 10 triggers a switch function. In this embodiment, the first predetermined angle is smaller than the second predetermined angle.
Referring to fig. 4, in the position detection of the position limiter of the present invention, when the roller type position switch 10 collides against the position limit stopper 20, the rotating arm 11 of the roller type position switch 10 contacts the position limit stopper 20 at the point a of the first collision slope 22 and starts to be rotated by a force, and when the position switch moves to the point O1In position, the roller end of the rotating arm 11 is at the turning point B, the rotating arm 11 is at 01B state, in this case, the states of normally open and normally closed contacts in the travel switch 10 are switched, but due to the inertia of the moving part and the problem of response delay of the control system itself, the moving part will move from point B to point C along the maintaining plane 23, when the upper rotating arm of the travel switch runs to point O2In the C-turn state, the motion part stops moving, and the rotating arm 11 is restored to the original state O under the action of the force of the return spring 122E and keep this state, the position E is that the reset spring 12 is completely in the original uncompressed state, in order to adapt to the situation that the speed when the travel switch on the moving machinery impacts the stop block is different, the moving machinery can carry out the limit stop in the working speed range and ensure that the upper rotating arm can be recovered to the original state, and the travel switch 10 keeps the free sliding state in this section from the position E to the position F of the reset groove 24. In order to improve the reliable action of the moving machine, the point F to the point G in the second impact inclined plane 25 are secondary impact sections, when the roller type travel switch 10 cannot complete the switching task after impacting the first impact inclined plane 22, the rotating arm 11 is contacted with the second impact inclined plane 25 again, the reliable action of the micro switch is further ensured, and the reliable stop of the moving machine is realized.
The travel limit device of the invention can be applied to equipment with the travel limit device, and the equipment with the travel limit device can be a machine tool with travel limit detection, a hoisting machine with travel limit detection, a door with travel limit detection (such as an automatic door of an elevator) and the like.
As can be seen from the above, the travel limit stop of the present invention, by providing the reset groove 24, the roller type travel switch 10 can be reset at the reset groove 24 after impacting the first impact inclined plane 22 to complete the switching task, which changes the situation that the rotating arm cannot be restored to the original state due to the long-term compression of the spring inside the roller type travel switch 10, and improves the service life of the roller type travel switch 10. In addition, the reset groove 24 is provided with the second impact inclined surface 25, so that when the roller type travel switch 10 cannot complete the switching task after impacting the first impact inclined surface 22, the second impact inclined surface 25 is impacted to complete the switching task, thereby realizing the reliable stop of the moving machine, improving the reliability of the moving machine and reducing the failure rate of mechanical equipment.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept also fall within the protection scope of the present invention.
Claims (11)
1. The utility model provides a travel limit stop is provided with the switch and touches portion, its characterized in that:
the switch contact part is provided with a first impact inclined plane, a maintaining plane and a reset groove, and the first impact inclined plane, the maintaining plane and the reset groove are sequentially arranged on the same side of the switch contact part in the direction of the roller type travel switch impact travel limit stop block;
the first impact inclined plane is used for enabling a rotating arm of the roller type travel switch to rotate when the rotating arm impacts a travel limit stop;
the maintaining plane is used for keeping a period of time after the rotating arm rotates to a certain angle;
the reset groove is used for resetting when the rotating arm travels to the reset groove.
2. The bump stop of claim 1, wherein:
the reset groove is provided with a second impact inclined plane, and the second impact inclined plane is arranged on one side, away from the first impact inclined plane, of the reset groove.
3. The bump stop of claim 2, wherein:
in the direction of the roller type travel switch impacting the travel limit stop, the length of the first impacting inclined surface is smaller than or equal to that of the second impacting inclined surface.
4. The bump stop of claim 3, wherein:
the second impact inclined plane and the maintaining plane are arranged at a first preset angle.
5. The bump stop of any of claims 1-4, wherein:
the first impact inclined plane and the maintaining plane are arranged at a second preset angle.
6. A stroke limiting device comprises a roller type stroke switch and a stroke limiting stop, wherein the roller type stroke switch and the stroke limiting stop are arranged in a matching way; the roller type travel switch is provided with a rotating arm and a return spring, and the rotating arm and the return spring are arranged in a matched manner; the travel limit stop is provided with a switch contact part, and is characterized in that:
the switch contact part is provided with a first impact inclined plane, a maintaining plane and a reset groove, and the first impact inclined plane, the maintaining plane and the reset groove are sequentially arranged on the same side of the switch contact part in the direction of the roller type travel switch impact travel limit stop block;
the first impact inclined plane is used for enabling a rotating arm of the roller type travel switch to rotate when the rotating arm impacts a travel limit stop;
the maintaining plane is used for keeping a period of time after the rotating arm rotates to a certain angle;
the reset groove is used for resetting when the rotating arm travels to the reset groove.
7. The travel stop device of claim 6, wherein:
the reset groove is provided with a second impact inclined plane, and the second impact inclined plane is arranged on one side, away from the first impact inclined plane, of the reset groove.
8. The travel stop device of claim 7, wherein:
in the direction of the roller type travel switch impacting the travel limit stop, the length of the first impacting inclined surface is smaller than or equal to that of the second impacting inclined surface.
9. The travel stop device of claim 8, wherein:
the second impact inclined plane and the maintaining plane are arranged at a first preset angle.
10. The travel stop device according to any one of claims 6 to 9, wherein:
the first impact inclined plane and the maintaining plane are arranged at a second preset angle.
11. Equipment with stroke stop device is provided with stroke stop device, its characterized in that: the stroke limiting device is applied to the stroke limiting device of any one of the preceding claims 6 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986859.7A CN110634691B (en) | 2019-10-17 | 2019-10-17 | Travel limit stop, travel limit device and equipment with travel limit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910986859.7A CN110634691B (en) | 2019-10-17 | 2019-10-17 | Travel limit stop, travel limit device and equipment with travel limit device |
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| Publication Number | Publication Date |
|---|---|
| CN110634691A CN110634691A (en) | 2019-12-31 |
| CN110634691B true CN110634691B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910986859.7A Active CN110634691B (en) | 2019-10-17 | 2019-10-17 | Travel limit stop, travel limit device and equipment with travel limit device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107290936B (en) * | 2016-03-31 | 2019-03-08 | 上海微电子装备（集团）股份有限公司 | A kind of mask platform with mechanical limit structure |
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