CN218665235U - Lead screw with lower limit switch - Google Patents
Lead screw with lower limit switch Download PDFInfo
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- CN218665235U CN218665235U CN202120516121.7U CN202120516121U CN218665235U CN 218665235 U CN218665235 U CN 218665235U CN 202120516121 U CN202120516121 U CN 202120516121U CN 218665235 U CN218665235 U CN 218665235U
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- lower limit
- limit switch
- lead screw
- switch
- gear
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Abstract
The utility model relates to a screw rod with a lower limit switch, which comprises an upper part and a lower part which are connected by a threaded rod, wherein a first gear and a second gear are arranged at the end part of the threaded rod and are meshed; the lead screw is installed down limit switch, and limit switch includes ejector pin and lower limit switch subassembly down, and the lower limit switch subassembly moves the pole including lower limit micro-gap switch and lower limit displacement, and lower limit micro-gap switch is equipped with down the limit switch bump, and lower limit displacement moves the pole and is provided with wide portion and narrow portion, connects through the slope between wide portion and the narrow portion. The utility model discloses simple structure, sensitivity height, fault rate are almost zero, for realizing that lift platform's stable goes up and down with effective spacing make the contribution.
Description
Technical Field
The utility model relates to a lead screw specifically relates to a lead screw with lower limit switch, mainly used lift platform's lift.
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 that performance is superior. 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 the lead screw with the travel limit switch, which has the advantages of simple structure, convenience in installation, high sensitivity and low failure rate, is a main development direction of technicians in the field at the present stage.
Based on this, provide the utility model discloses.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem of prior art, the utility model provides a lead screw with limit switch down, limit switch simple structure, sensitivity height, fault rate of lower level are almost zero when it goes up and down, for realizing that lift platform's stable goes up and down and effectively spacing make the contribution.
In order to achieve the purpose, the utility model is realized by the following technical proposal:
a screw rod with a lower limit switch comprises an upper portion and a lower portion of the screw rod which are connected through a screw rod, wherein a first gear and a second gear are mounted at the end of the screw rod and meshed with each other; the lead screw is installed down limit switch, limit switch includes ejector pin and lower limit switch subassembly down, the limit switch subassembly is moved the pole including lower limit micro-gap switch and lower limit displacement down, lower limit micro-gap switch is equipped with down the limit switch bump, lower limit displacement moves the pole and is provided with wide portion and narrow portion, connect through the slope between wide portion and the narrow portion.
The upper seat body is installed on the upper portion of the screw rod, the lower seat body is installed on the lower portion of the screw rod, the lower limit switch assembly is installed on the upper seat body, and the ejector rod is installed on the lower seat body.
The lower limit displacement moving rod is provided with a lower limit spring.
The lower limit displacement moving rod is provided with a lower limit body, and the lower limit displacement moving rod moves in the lower limit body.
The lower retainers are two, and the wide portion and the narrow portion are located between the two lower retainers.
The upper seat body is provided with a through hole, and when the lower limit switch is closed, the end part of the lower limit displacement moving rod extends out of the outer side of the through hole.
The beneficial effects of the utility model are as follows:
the utility model discloses lead screw with limit switch down, when the lead screw descends to the extreme low position, through wide portion to pressing of limit switch bump down, limit micro-gap switch under can effectively closing for lead screw stop motion prevents the decline again of lift platform. The utility model discloses simple structure, sensitivity height, fault rate are almost zero, for realizing that lift platform's stable goes up and down with effective spacing make the contribution.
Drawings
Fig. 1 is a schematic view of the internal structure of the screw rod of the present invention;
fig. 2 is a schematic view of an open state of a lower limit switch in the present invention;
fig. 3 is a schematic diagram of a closed state of the lower limit switch in the present invention;
wherein, 1 is a threaded rod, 2 is an upper part of the screw rod, 3 is a lower part of the screw rod, 4 is a first gear, 5 is a second gear, 6 is a mandril, 7 is a lower limit microswitch, 8 is a lower limit displacement moving rod, 9 is a lower limit switch salient point, 10 is a wide part, 11 is a narrow part, 12 is a slope, 13 is an upper seat body, 14 is a lower seat body, 15 is a lower limit spring, and 16 is a lower limit body.
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. 1-3, the screw rod with the lower limit switch of the present invention comprises an upper portion 2 and a lower portion 3 connected by a threaded rod 1, wherein a first gear 4 and a second gear 5 are mounted at the end of the threaded rod 1, and the first gear 4 is engaged with the second gear 5; the lead screw is provided with a lower limit switch.
The upper part 2 of the screw rod is provided with an upper seat body 13, and the lower part 3 of the screw rod is provided with a lower seat body 14.
The lower limit switch component is arranged on the upper base body 13, and the mandril 6 is arranged on the lower base body 14. Move pole 8 and break away from upper base body 11 for preventing lower limit displacement, the utility model provides a lower limit displacement moves pole 8 and is equipped with two lower retainers 16, and lower limit displacement moves pole 8 and removes in lower retainer 16, and wide portion 10 and narrow portion 11 are located between two lower retainers 16, realize spacing wide portion 10 and narrow portion 11, have also realized spacing to lower retaining spring 15.
During the use, the upper seat body 13 is installed at lead screw upper portion 2, lower seat body 14 is installed at lead screw lower part 3, when the user needs to descend lifting platform, lead screw upper portion 2 moves down, after moving to a certain degree, the one end that the lower limit displacement moved the pole 8 contacts ejector pin 6, along with the continuation motion of lead screw upper portion 2, lower limit displacement moved pole 8 by the direction of ejector pin 6 top down spacing spring 15, slope 12 slowly contacts lower spacing switch bump 9, and lower limit displacement moves pole 8 and continues by the direction of ejector pin 6 top down spacing spring 15, lower spacing switch bump 9 reaches on wide portion 10 along slope 12, lower spacing switch bump 9 is down pressed through wide portion 10, make the switch close the outage, the lead screw reaches the minimum, lower spacing spring 15 is compressed to the minimum, lifting platform stops going up and down.
The utility model discloses there are two kinds of modes to the installation of lower limit displacement transfer pole 8: 1. the upper base body 13 is provided with a through hole (the utility model discloses do not mark in the drawing), and when lower limit switch closed, the through hole outside was stretched out to the tip of lower limit displacement pole 8. 2. When the switch is opened, the end part of the lower limit displacement moving rod 8 has a certain distance with the upper seat body 13, and along with the movement of the lower limit displacement moving rod 8, when the switch is closed, one end of the lower limit displacement moving rod props against the upper seat body 13.
The utility model discloses lead screw with limit switch down, when the lead screw descends to the extreme low position, through wide portion 10 to pressing of limit switch bump 9 down, limit micro-gap switch 7 under can effectively closing for lead screw stop motion prevents the decline again of lift platform.
The utility model discloses well lead screw lower part 3 is equipped with the internal thread (the utility model discloses do not mark in the drawing), the external screw thread and the internal thread meshing of threaded rod 1. The second gear 5 is externally connected with a driving device, the first gear 4 is driven to rotate by driving the second gear 5, so that the up-and-down movement of the threaded rod 1 is realized,
the utility model discloses simple structure, sensitivity height, fault rate are almost zero, for realizing that lift platform's stable goes up and down with effective spacing make the contribution.
The above embodiments are only used for explaining the inventive concept of the present invention, and not for limiting the protection of the claims of the present invention, and all the insubstantial modifications of the present invention made by using the above inventive concept shall fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a lead screw with limit switch down which characterized in that: the screw rod driving device comprises a screw rod upper part and a screw rod lower part which are connected through a screw rod, wherein a gear I and a gear II are installed at the end part of the screw rod, and the gear I is meshed with the gear II; limit switch under the lead screw is installed, limit switch includes ejector pin and lower limit switch subassembly down, limit switch subassembly includes that limit micro-gap switch and lower limit displacement move the pole down, limit micro-gap switch is equipped with down the limit switch bump down, lower limit displacement moves the pole and is provided with wide portion and narrow portion, connect through the slope between wide portion and the narrow portion.
2. The lead screw having a lower limit switch as set forth in claim 1, wherein: the upper seat body is installed on the upper portion of the screw rod, the lower seat body is installed on the lower portion of the screw rod, the lower limit switch assembly is installed on the upper seat body, and the ejector rod is installed on the lower seat body.
3. The lead screw having a lower limit switch as set forth in claim 1, wherein: the lower limit displacement moving rod is provided with a lower limit spring.
4. The lead screw having a lower limit switch of claim 2, wherein: the lower limit displacement moving rod is provided with a lower limit body, and the lower limit displacement moving rod moves in the lower limit body.
5. The lead screw having a lower limit switch of claim 4, wherein: the lower retainers are two, and the wide portion and the narrow portion are located between the two lower retainers.
6. The lead screw having a lower limit switch of claim 2, wherein: the upper seat body is provided with a through hole, and when the lower limit switch is closed, the end part of the lower limit displacement moving rod extends out of the outer side of the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516121.7U CN218665235U (en) | 2021-03-09 | 2021-03-09 | Lead screw with lower limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516121.7U CN218665235U (en) | 2021-03-09 | 2021-03-09 | Lead screw with lower limit switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218665235U true CN218665235U (en) | 2023-03-21 |
Family
ID=85535304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120516121.7U Active CN218665235U (en) | 2021-03-09 | 2021-03-09 | Lead screw with lower limit switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218665235U (en) |
-
2021
- 2021-03-09 CN CN202120516121.7U patent/CN218665235U/en active Active
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