CN112897397A - Upper limit switch for lead screw - Google Patents
Upper limit switch for lead screw Download PDFInfo
- Publication number
- CN112897397A CN112897397A CN202110252858.7A CN202110252858A CN112897397A CN 112897397 A CN112897397 A CN 112897397A CN 202110252858 A CN202110252858 A CN 202110252858A CN 112897397 A CN112897397 A CN 112897397A
- Authority
- CN
- China
- Prior art keywords
- rod
- seat body
- lead screw
- microswitch
- upper limit
- 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.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Push-Button Switches (AREA)
Abstract
The invention relates to an upper limit switch for a lead screw, which comprises an upper seat body and a lower seat body, wherein the lower seat body is provided with a blocking piece, the blocking piece is provided with a groove, the upper seat body is provided with a switch assembly and a sliding seat, the sliding seat is provided with a movable rod and a pressure rod, the movable rod extends into the groove, and the end part of the movable rod is provided with a limit body; the switch assembly comprises a microswitch, the microswitch is provided with a contact piece, and the pressing rod is positioned above the contact piece. When the screw rod rises to the highest position, the contact piece is pressed down through the pressure lever, the micro switch can be effectively closed, the screw rod stops moving, and the lifting platform is prevented from rising again. The lifting platform has the advantages of simple structure, high sensitivity and almost zero failure rate, and makes contribution to realizing stable lifting and effective limiting of the lifting platform.
Description
Technical Field
The invention relates to a limit switch, which is mainly used for limiting an upper limit of a screw rod and belongs to the technical field of switches.
Background
The lead screw is a core component in the lifting platform, and the quality and the function of the lead screw relate to the problems of whether the lifting of the lifting platform is stable, whether mute lifting can be realized and the like. Therefore, to realize the superiority of lift platform, the first task is to seek a lead screw with superior performance. However, the stroke limit in the screw rod is a technical problem in the prior art, and the stroke limit switch in the prior art has a complex structure, is difficult to install, has low sensitivity and a high failure rate, often has the situation of no timely limit, causes excessive stroke, and cannot obtain satisfactory user experience.
Therefore, the development of a travel limit switch with simple structure, convenient installation, high sensitivity and low failure rate is a main development direction of technicians in the field at the present stage.
The present invention has been made based on this.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the upper limit switch for the screw rod, which has the advantages of simple structure, high sensitivity and almost zero failure rate, and makes contribution to realizing stable lifting and effective limiting of the lifting platform.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an upper limit switch for a lead screw comprises an upper seat body and a lower seat body, wherein the lower seat body is provided with a blocking piece, the blocking piece is provided with a groove, the upper seat body is provided with a switch assembly and a sliding seat, the sliding seat is provided with a movable rod and a pressure rod, the movable rod extends into the groove, and the end part of the movable rod is provided with a limit body; the switch assembly comprises a microswitch, the microswitch is provided with a contact piece, and the pressing rod is positioned above the contact piece.
The upper seat body is provided with a fixed seat, and the microswitch is arranged on the fixed seat.
The end of the moving rod is provided with a spring which is positioned between the fixed seat and the sliding seat.
The movable rod slides in the slide rail.
The invention has the following beneficial effects:
the upper limit switch for the screw rod can effectively close the micro switch by pressing the contact piece downwards through the pressure rod when the screw rod rises to the highest position, so that the screw rod stops moving and the lifting platform is prevented from rising again. The lifting platform has the advantages of simple structure, high sensitivity and almost zero failure rate, and makes contribution to realizing stable lifting and effective limiting of the lifting platform.
Drawings
FIG. 1 is a schematic diagram of the switch of the present invention in an open state;
FIG. 2 is a schematic diagram of the switch of the present invention in the off state;
wherein, 1 is an upper seat body, 2 is a lower seat body, 3 is a blocking piece, 4 is a groove, 5 is a sliding seat, 6 is a moving rod, 7 is a pressure rod, 8 is a limiting body, 9 is a microswitch, 10 is a contact piece, 11 is a spring, 12 is a fixed seat, 13 is a sliding rail, 14 is a lower part of a screw rod, and 15 is an upper part of the screw rod.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto.
As shown in fig. 1 and 2, the upper limit switch for the lead screw of the invention comprises an upper seat body 1 and a lower seat body 2, wherein the lower seat body 2 is provided with a blocking piece 3, the blocking piece 3 is provided with a groove 4, the upper seat body 1 is provided with a switch assembly and a sliding seat 5, the upper seat body 1 is provided with a fixed seat 12, and a microswitch 9 is arranged on the fixed seat 12. A moving rod 6 and a pressure rod 7 are arranged on the sliding seat 5, the moving rod 6 extends into the groove 4, and a limiting body 8 is arranged at the end part of the moving rod 6; the other end of the movable rod 6 is provided with a spring 11, and the spring 11 is positioned between the fixed seat 12 and the sliding seat 5. The switch assembly comprises a microswitch 9, the microswitch 9 is provided with a contact piece 10, and the pressure lever 7 is positioned above the contact piece 10.
When the screw rod sliding seat is used, the upper seat body 1 is arranged on the upper portion 15 of the screw rod, the lower seat body 2 is arranged on the lower portion 14 of the screw rod, the lower portion 14 of the screw rod further comprises a sliding rail 13, and when the screw rod sliding seat is used, the moving rod 6 slides in the sliding rail 13. When the lifting platform needs to ascend, the movable rod 6 slides in the sliding rail 13 along with the upward movement of the upper part 15 of the screw rod, after the movable rod slides to a certain distance, the limiting body 8 is blocked by the blocking piece 3, so that the movable rod 6 can not slide any more, at the moment, the sliding seat 5 is pulled downwards along with the continuous ascending of the screw rod, the pressing rod 7 slowly approaches the contact piece 10, until the spring 11 is pressed to the lowest position, the pressing rod 7 presses the contact piece 10, the micro switch 9 is closed, the screw rod stops ascending, and therefore the lifting platform also stops ascending.
When the screw rod rises to the highest position, the contact piece 10 is pressed down through the pressure lever 7, the microswitch 9 can be effectively closed, so that the screw rod stops moving, and the lifting platform is prevented from rising again. The lifting platform has the advantages of simple structure, high sensitivity and almost zero failure rate, and makes contribution to realizing stable lifting and effective limiting of the lifting platform.
The structures and installation relations of the screw rod, the lifting platform and the like in the embodiment are common general knowledge in the field, and are not described herein again.
The above-mentioned embodiments are only used for explaining the inventive concept of the present invention, and do not limit the protection of the claims of the present invention, and any insubstantial modifications of the present invention using this concept shall fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides an upper limit switch for lead screw which characterized in that: the switch comprises an upper seat body and a lower seat body, wherein the lower seat body is provided with a blocking piece, the blocking piece is provided with a groove, the upper seat body is provided with a switch assembly and a sliding seat, the sliding seat is provided with a moving rod and a pressing rod, the moving rod extends into the groove, and the end part of the moving rod is provided with a limiting body; the switch assembly comprises a microswitch, the microswitch is provided with a contact piece, and the pressing rod is positioned above the contact piece.
2. The upper limit switch for a lead screw according to claim 1, wherein: the upper seat body is provided with a fixed seat, and the microswitch is arranged on the fixed seat.
3. The upper limit switch for the lead screw according to claim 2, wherein: the end of the moving rod is provided with a spring which is positioned between the fixed seat and the sliding seat.
4. The upper limit switch for a lead screw according to claim 1, wherein: the movable rod slides in the slide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110252858.7A CN112897397A (en) | 2021-03-09 | 2021-03-09 | Upper limit switch for lead screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110252858.7A CN112897397A (en) | 2021-03-09 | 2021-03-09 | Upper limit switch for lead screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112897397A true CN112897397A (en) | 2021-06-04 |
Family
ID=76107096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110252858.7A Withdrawn CN112897397A (en) | 2021-03-09 | 2021-03-09 | Upper limit switch for lead screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112897397A (en) |
-
2021
- 2021-03-09 CN CN202110252858.7A patent/CN112897397A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210604 |