CN211209494U - Electric push rod with motor overload protection function - Google Patents
Electric push rod with motor overload protection function Download PDFInfo
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- CN211209494U CN211209494U CN201922152457.5U CN201922152457U CN211209494U CN 211209494 U CN211209494 U CN 211209494U CN 201922152457 U CN201922152457 U CN 201922152457U CN 211209494 U CN211209494 U CN 211209494U
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- 238000010586 diagram Methods 0.000 description 2
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Abstract
The utility model discloses an electric putter with motor overload protection function, include: the sliding seat is provided with a motor at one end; the screw is rotationally arranged on the sliding seat and is in transmission connection with the motor; the sliding block is arranged on the sliding seat in a sliding mode and is matched with the screw rod in a transmission mode; and the current overload protection unit is electrically connected to the control circuit of the motor. The utility model provides an electric putter, when the motor transships, through the protection of electric current overload unit motor not burnt out, the life of extension motor reduces electric putter's maintenance rate.
Description
Technical Field
The utility model relates to an electric putter field especially relates to an electric putter with motor overload protection function.
Background
The electric push rod mainly utilizes the motor and the worm gear group to drive the screw rod to rotate forwards or backwards, the screw rod drives the sliding block to do reciprocating linear motion, and the electric push rod is widely applied to equipment such as sickbeds, electric chairs, sofas and the like or other occasions needing telescopic motion.
At present, the electric push rod on the market is caused by the overload of the motor by more than 70% in the motor burnout accident, and the motor of the existing electric push rod is not protected by overload, so that the service life of the motor is short, the maintenance rate of the electric push rod is high, and the experience feeling is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above prior art at least one defect, the utility model provides an electric putter with motor overload protection function.
The utility model discloses a solve the technical scheme that its problem adopted and be:
an electric putter with motor overload protection function, comprising:
the sliding seat is provided with a motor at one end;
the screw is rotationally arranged on the sliding seat and is in transmission connection with the motor;
the sliding block is arranged on the sliding seat in a sliding mode and is matched with the screw rod in a transmission mode;
and the current overload protection unit is electrically connected to the control circuit of the motor.
The utility model provides an electric putter, when the motor transships, through the protection of electric current overload unit motor not burnt out, the life of extension motor reduces electric putter's maintenance rate.
Further, the current overload protection unit is a PTC thermistor, and the motor and the PTC thermistor are connected in series on the control circuit. Therefore, when the motor is overloaded, the current in the control circuit is increased, the PTC thermistor consumes redundant current values through the sudden change of the resistance value after heating, the motor is protected from being burnt, the PTC thermistor can be repeatedly used for multiple times, and the use experience feeling is enhanced.
Further, the control circuit comprises a push rod action circuit and a push rod limiting circuit, the PTC thermistor, the motor and the push rod limiting circuit are sequentially connected in series, and the push rod action circuit controls the motor to rotate forwards and backwards.
Further, the push rod action circuit comprises an uplink key switch and a downlink key switch, the uplink key switch comprises a first common contact, a first normally open contact and a first normally closed contact, the downlink key switch comprises a second common contact, a second normally open contact and a second normally closed contact, the first common contact is electrically connected to one end of the PTC thermistor, the second common contact is electrically connected to one end of the push rod limiting circuit, the first normally open contact and the second normally open contact are electrically connected to the live wire, and the first normally closed contact and the second normally closed contact are electrically connected to the zero line.
Furthermore, the push rod limiting circuit comprises an uplink limiting circuit and a downlink limiting circuit which are connected in series, the uplink limiting circuit comprises an uplink limiting switch and a first group of diodes which are connected in parallel, the downlink limiting circuit comprises a downlink limiting switch and a second group of diodes which are connected in parallel, and the uplink limiting switch and the downlink limiting switch are arranged on the sliding seat to limit the sliding stroke of the sliding block.
To sum up, the utility model provides an electric putter has following technological effect:
the control circuit of the electric push rod is overall simpler, wiring is facilitated, the PTC thermistor is used as a current overload protection unit to protect the motor from being burnt, the service life of the motor is prolonged, the maintenance rate of the electric push rod is reduced, the electric push rod can be repeatedly used for multiple times, and the use experience feeling is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of a control circuit according to an embodiment of the present invention.
Wherein the reference numerals have the following meanings:
1. a slide base; 11. a slide bar; 12. a front mounting base; 13. a rear mounting seat; 2. a motor; 3. a screw; 4. a slider; 5. an uplink limit switch; 51. a first movable terminal; 52. a first stationary terminal; 53. a second stationary terminal; 6. an uplink limit switch; 61. a second movable terminal; 62. a third stationary terminal; 63. a fourth stationary terminal; 7. a PTC thermistor; 100. an uplink key switch; 200. a down key switch; 300. a first set of diodes; 400. a second set of diodes.
Detailed Description
For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 and 2, the utility model discloses an electric putter with motor overload protection function, including slide 1, motor 2, screw rod 3, slider 4 and electric current overload protection unit, motor 2 set up in the one end of slide 1, screw rod 3 rotate set up in on the slide 1 and with 2 transmissions of motor are connected, slider 4 slide set up in on the slide 1 and with 3 cooperation transmissions of screw rod are connected, electric current overload protection unit set up in on the slide 1 and the electricity connect in the control circuit of motor 2.
The utility model provides an electric putter, when the motor transships, through the disconnection of electric current overload protection unit or reduction control circuit's electric current, protection motor 2 are not burnt out, and extension motor 2's life reduces electric putter's maintenance rate.
Referring to fig. 1, specifically, the sliding seat 1 includes a sliding rod 11, a front mounting seat 12 and a rear mounting seat 13, the sliding rod 11 is fixed between the front mounting seat 12 and the rear mounting seat 13, the screw rod 3 is rotatably installed between the front mounting seat 12 and the rear mounting seat 13, the motor 2 and the current overload protection unit are arranged on the rear mounting seat 13, and the rear mounting seat 13 is further provided with a transmission assembly for realizing transmission connection between the screw rod 3 and the motor 2.
The transmission assembly comprises a worm arranged at the output end of the motor 2 and a worm wheel arranged on the screw rod 3 and used for being matched with the worm and being meshed with each other for transmission. The motor 2 drives the worm to rotate so as to drive the worm wheel to rotate, the worm wheel drives the screw rod 3 to rotate, and the screw rod 3 drives the sliding block 4 to linearly move on the sliding rod 11.
Admittedly, the aforesaid is right the concrete structural description of slide 1, slider 4, drive assembly is only the utility model discloses an optimal scheme, the utility model discloses a right the concrete structure of slide 1, slider 4, drive assembly does not do the restriction, only needs to satisfy slider 4 sets up and realizes that the transmission connection function of screw rod 3 and motor 2 can with the sliding mutually of slide 1.
Referring to fig. 2, the current overload protection unit is a PTC thermistor 7, and the motor 2 and the PTC thermistor 7 are connected in series to the control circuit. Therefore, when the electric push rod is overloaded or transmission parts are blocked, the motor 2 cannot normally rotate to cause overload, the current in the control circuit is increased, and the PTC thermistor 7 consumes redundant current value through sudden resistance value change after heating, so that the motor 2 is protected from being burnt; after the current is reduced, the PTC thermistor 7 begins to cool down and the resistance value is recovered to a normal numerical value, the current in the control circuit is increased, if the fault is eliminated at the moment, the motor 2 begins to work normally, the PTC thermistor 7 is small in size, convenient to use, good in stability and strong in overload capacity, and can be mounted on the rear mounting seat 13 to simplify the electric push rod, and the PTC thermistor 7 can be reused for multiple times, so that the use experience is enhanced.
Indeed, in other preferred embodiments, a plurality of PTC thermistors 7 may be provided, and a plurality of PTC thermistors 7 may be combined in series or in parallel to meet different protection requirements for the motor 2.
In this embodiment, the control circuit includes a push rod action circuit and a push rod limit circuit, the PTC thermistor 7, the motor 2 and the push rod limit circuit are sequentially connected in series, and the push rod action circuit controls the forward and reverse rotation of the motor 2.
Indeed, in this embodiment, the series connection sequence of the PTC thermistor 7, the motor 2, and the push rod limiting circuit may also be the motor 2, the PTC thermistor 7, and the push rod limiting circuit in sequence, or the motor 2, the push rod limiting circuit, and the PTC thermistor 7, which are connected in series.
The push rod action circuit comprises an uplink key switch 100 and a downlink key switch 200, the uplink key switch 100 comprises a first common contact b, a first normally open contact a and a first normally closed contact c, the downlink key switch 100 comprises a second common contact e, a second normally open contact d and a second normally closed contact f, the first common contact b is electrically connected to one end of the PTC thermistor 7, the second common contact e is electrically connected to one end of the push rod limiting circuit, the first normally open contact a and the second normally open contact d are electrically connected to a live wire, and the first normally closed contact c and the second normally closed contact f are electrically connected to a zero wire.
The push rod limiting circuit comprises an uplink limiting circuit and a downlink limiting circuit which are connected in series, the uplink limiting circuit comprises an uplink limiting switch 5 and a first group of diodes 300 which are connected in parallel, the downlink limiting circuit comprises a downlink limiting switch 6 and a second group of diodes 400 which are connected in parallel, and the uplink limiting switch 5 and the downlink limiting switch 6 are arranged on the sliding seat 1 to limit the sliding stroke of the sliding block 4.
Specifically, the up limit switch 5 includes a first movable terminal 51, a first stationary terminal 52 and a second stationary terminal 53, and the down limit switch 6 includes a second movable terminal 61, a third stationary terminal 62 and a fourth stationary terminal 63. Wherein the second fixed terminal 53 and the fourth fixed terminal 63 are in idle connection, the cathodes of the first movable terminal 51 and the first group of diodes 300 are communicated with the first end of the uplink limiting circuit, the anodes of the first fixed terminal 52 and the first group of diodes 300 are communicated with the second end of the uplink limiting circuit, the anodes of the second movable terminal 61 and the second group of diodes 400 are communicated with the first end of the downlink limiting circuit, the cathodes of the third fixed terminal 62 and the first group of diodes 300 are communicated with the second end of the downlink limiting circuit, the first end of the uplink limiting circuit is communicated with the second end of the downlink limiting circuit, the second end of the uplink limiting circuit is communicated with the second common contact e of the downlink key switch, the second end of the downlink limiting circuit is communicated with one end of the motor 2, and the other end of the motor 2 is communicated with one end of the PTC thermistor 7, the other end of the PTC thermistor 7 communicates with the first common contact b of the up key switch 100. The control circuit is simple in whole, the number of electric elements is small, all sub-circuits are connected in series, wiring of the circuit is facilitated, loss of connecting wires is reduced, and production is facilitated.
Referring to fig. 2, the working principle of the control circuit of the electric putter provided by the present invention is as follows (for convenience of principle description, specifically take the use scenario when the slider 4 is located in the middle of the sliding rod 11 as an example, at this time, the first movable terminal 51 of the upward limit switch 5 is communicated with the first stationary terminal 52, and the second movable terminal 61 of the downward limit switch 6 is communicated with the third stationary terminal 62):
(1) when the user needs to go up, the up key switch 100 is pressed, the first common contact b is disconnected with the first normally closed contact c, the first common contact b is connected with the first normally open contact a, the second group of diodes 400 are conducted, the first group of diodes 300 are not conducted, current sequentially passes through the up key switch 100, the PTC thermistor 7, the motor 2, the second group of diodes 400, the first movable terminal 51, the first fixed terminal 52 and the down key switch 200 to enter a zero line, and the motor 2 rotates forwards to drive the sliding block 4 to go up;
(2) when the down button switch 200 is pressed, the second common contact e is connected with the second normally open contact d, the first group of diodes 300 is conducted, the second group of diodes 400 is not conducted, the current sequentially passes through the down button switch 200, the first group of diodes 300, the third static terminal 62, the second dynamic terminal 61, the motor 2, the PTC thermistor 7 and the up button switch 100 to enter a zero line, and the motor 2 reversely rotates to drive the sliding block 4 to move down.
To sum up, the utility model provides an electric putter, its control circuit is whole comparatively succinct, does benefit to the wiring, utilizes PTC thermistor 7 not burnt out as electric current overload protection unit in order to protect motor 2, prolongs motor 2's life, reduces electric putter's maintenance rate, and used repeatedly many times, and the reinforcing is used and is experienced the sense.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides an electric putter with motor overload protection function which characterized in that includes:
the sliding seat is provided with a motor at one end;
the screw is rotationally arranged on the sliding seat and is in transmission connection with the motor;
the sliding block is arranged on the sliding seat in a sliding mode and is matched with the screw rod in a transmission mode;
and the current overload protection unit is electrically connected to the control circuit of the motor.
2. The power putter of claim 1, wherein the current overload protection unit is a PTC thermistor, and the motor and the PTC thermistor are connected in series to the control circuit.
3. The electric putter as claimed in claim 2, wherein the control circuit comprises a putter actuating circuit and a putter limiting circuit, the PTC thermistor, the motor and the putter limiting circuit are sequentially connected in series, and the putter actuating circuit controls the motor to rotate forward and backward.
4. The power putter of claim 3, wherein the putter actuation circuit comprises an up key switch and a down key switch, the up key switch comprises a first common contact, a first normally open contact and a first normally closed contact, the down key switch comprises a second common contact, a second normally open contact and a second normally closed contact, the first common contact is electrically connected to one end of the PTC thermistor, the second common contact is electrically connected to one end of the putter limiting circuit, the first normally open contact and the second normally open contact are both electrically connected to the live wire, and the first normally closed contact and the second normally closed contact are both electrically connected to the neutral wire.
5. The electric putter of claim 4, wherein the putter limit circuit comprises an uplink limit circuit and a downlink limit circuit connected in series, the uplink limit circuit comprises an uplink limit switch and a first set of diodes connected in parallel, the downlink limit circuit comprises a downlink limit switch and a second set of diodes connected in parallel, an anode of the first set of diodes is connected to one end of the motor, a cathode of the first set of diodes is connected to a cathode of the second set of diodes, an anode of the second set of diodes is connected to the second common contact, and the uplink limit switch and the downlink limit switch are disposed on the slider to limit a sliding stroke of the slider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922152457.5U CN211209494U (en) | 2019-12-04 | 2019-12-04 | Electric push rod with motor overload protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922152457.5U CN211209494U (en) | 2019-12-04 | 2019-12-04 | Electric push rod with motor overload protection function |
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| Publication Number | Publication Date |
|---|---|
| CN211209494U true CN211209494U (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922152457.5U Active CN211209494U (en) | 2019-12-04 | 2019-12-04 | Electric push rod with motor overload protection function |
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| CN (1) | CN211209494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904904A (en) * | 2021-01-28 | 2021-06-04 | 四川巧夺天工信息安全智能设备有限公司 | Method and device for controlling lifting of electric push rod |
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2019
- 2019-12-04 CN CN201922152457.5U patent/CN211209494U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112904904A (en) * | 2021-01-28 | 2021-06-04 | 四川巧夺天工信息安全智能设备有限公司 | Method and device for controlling lifting of electric push rod |
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| GR01 | Patent grant | ||
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Effective date of registration: 20240515 Address after: 215200 west side of Tongjin Avenue, Wujiang Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: Ruimai Technology Co.,Ltd. Country or region after: China Address before: 516083 5th floor, 68 Longshan 1st Road, Dayawan West District, Huizhou City, Guangdong Province (R & D office building of Minhua company) Patentee before: Huizhou Ruipelin Intelligent Technology Co.,Ltd. Country or region before: China |