CN212744913U - Electric push rod with self-locking function - Google Patents
Electric push rod with self-locking function Download PDFInfo
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- CN212744913U CN212744913U CN202020846808.2U CN202020846808U CN212744913U CN 212744913 U CN212744913 U CN 212744913U CN 202020846808 U CN202020846808 U CN 202020846808U CN 212744913 U CN212744913 U CN 212744913U
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- screw rod
- locking function
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Abstract
The utility model discloses a take self-locking function's electric putter belongs to electric putter technical field. The electric push rod with the self-locking function comprises a shell, an inner pipe and a mounting ring, wherein the inner pipe is positioned in the shell and can shuttle back and forth from an opening at the top end of the shell; a screw rod penetrates through the shell, and the tail end of the inner tube is rotatably connected with the screw rod through a screw rod nut pair; the tail end of the screw rod is connected with an output shaft of the motor through a transmission gear; the lead screw is fixedly connected with a self-locking device, and the self-locking device can clamp the lead screw to prevent the lead screw from rotating when the top end of the lead screw is stressed. This electric putter's self-lock device compares with traditional self-lock device, inwards holds the lead screw tightly with the torsional spring and relies on frictional force locking motion state to change into the outside expansion of torsional spring, relies on the motion of torsional spring bush restraint torsional spring to lock motion state, can provide bigger moment of torsion to guarantee that electric putter can bear bigger pressure.
Description
Technical Field
The utility model relates to an electric putter technical field, in particular to take self-locking function's electric putter.
Background
The electric push rod is a universal auxiliary driving device and widely used in a plurality of industries, and the electric push rod is an electric driving device which converts the rotary motion of a motor into the linear reciprocating motion of the push rod and can be used as an execution machine to realize remote control, centralized control or automatic control.
The electric push rod has the main working principle that a motor drives a screw rod to rotate, a transmission nut is arranged on the screw rod, the screw rod drives the transmission nut to reciprocate when rotating, and a worm and gear mechanism or a transmission gear is usually adopted between the motor and the screw rod to realize transmission.
Want to make electric putter can stop at arbitrary height at the in-process that rises to keep this state, electric putter often need have self-locking function so, need increase self-lock device in electric putter inside, traditional self-lock device is through the torsional spring holding the lead screw tightly, relies on the torsional spring and the motion of lead screw at vertical direction of the frictional force locking lead screw that the lead screw contact surface produced, this self-lock device structure is complicated, and the moment of torsion that can bear is less, only can be applicable to little thrust electric putter.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take self-locking function's electric putter to it is complicated to solve traditional electric putter self-locking device structure, and the less problem of moment of torsion that can bear.
In order to solve the technical problem, the utility model provides an electric push rod with a self-locking function, which comprises a shell, an inner tube and a mounting ring, wherein the inner tube is positioned in the shell and can shuttle back and forth from an opening at the top end of the shell; the mounting ring is fixedly connected to the top end of the inner pipe;
a screw rod penetrates through the shell, and the tail end of the inner tube is rotatably connected with the screw rod through a screw rod nut pair;
the tail end of the screw rod is connected with an output shaft of the motor through a transmission gear;
the lead screw is fixedly connected with a self-locking device, and the self-locking device can clamp the lead screw to prevent the lead screw from rotating when the top end of the lead screw is stressed.
Optionally, the self-locking device comprises a torsion spring bushing fixing seat, a torsion spring bushing, an active shifting fork, a passive shifting fork and a torsion spring, and the torsion spring bushing is fixedly connected to the inner wall of the torsion spring bushing fixing seat; the torsion spring is in contact fit with the inner wall of the torsion spring bushing; the driving shifting fork is fixedly connected with the transmission gear and rotates along with the transmission gear; the passive shifting fork is fixedly connected with the screw rod through a key and rotates along with the screw rod.
Optionally, the starting end and the terminal end of the torsion spring are respectively bent with a first torsion spring bend angle and a second torsion spring bend angle.
Optionally, the first torsion spring bend and the second torsion spring bend are respectively located on two sides of the driving shifting fork, and a bend groove is formed in a contact position of the driving shifting fork and the first torsion spring bend and the second torsion spring bend.
Optionally, the screw-nut pair is slidably connected with the housing through a nut guide sleeve, a plurality of sliding blocks are arranged on the side wall of the nut guide sleeve, and each side sliding block is located in a sliding groove corresponding to the inner wall of the housing.
Optionally, the inner wall of the shell is provided with two limit switches, and the two limit switches are respectively located on two sides of the nut guide sleeve and can limit the moving length of the nut guide sleeve.
Optionally, the screw rod is rotatably connected with the housing through a thrust ball bearing.
The electric push rod with the self-locking function provided by the utility model comprises a shell, an inner tube and a mounting ring, wherein the inner tube is positioned in the shell and can shuttle back and forth from an opening at the top end of the shell; the mounting ring is fixedly connected to the top end of the inner pipe; a screw rod penetrates through the shell, and the tail end of the inner tube is rotatably connected with the screw rod through a screw rod nut pair; the tail end of the screw rod is connected with an output shaft of the motor through a transmission gear; the lead screw is fixedly connected with a self-locking device, and the self-locking device can clamp the lead screw to prevent the lead screw from rotating when the top end of the lead screw is stressed. This electric putter's self-lock device compares with traditional self-lock device, inwards holds the lead screw tightly with the torsional spring and relies on frictional force locking motion state to change into the outside expansion of torsional spring, relies on the motion of torsional spring bush restraint torsional spring to lock motion state, can provide bigger moment of torsion to guarantee that electric putter can bear bigger pressure.
Drawings
Fig. 1 is a schematic view of an overall structure of an electric push rod with a self-locking function provided by the present invention;
fig. 2 is an internal cross-sectional view of the electric putter with self-locking function provided by the present invention;
fig. 3 is a schematic structural view of an electric push rod self-locking device with a self-locking function provided by the present invention;
fig. 4 is a top view of the electric push rod self-locking device with self-locking function provided by the present invention;
FIG. 5 is a cross-sectional view of the A-A side of the electric putter self-locking device with self-locking function provided by the present invention;
fig. 6 is a cross-sectional view of a B-B surface of the electric push rod self-locking device with self-locking function provided by the utility model.
Detailed Description
The following describes an electric putter with self-locking function in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
Example one
The utility model provides an electric push rod with self-locking function, the structure of which is shown in figure 1 and figure 2, comprising a shell 1, an inner tube 2 and a mounting ring 3, wherein the inner tube 2 is positioned in the shell 1 and can shuttle back and forth from an opening at the top end of the shell 1; the mounting ring 3 is fixedly connected to the top end of the inner pipe 2; a screw rod 4 penetrates through the shell 1, and the tail end of the inner tube 2 is rotatably connected with the screw rod 4 through a screw rod nut pair 5; the tail end of the screw rod 4 is connected with an output shaft of a motor 8 through a transmission gear 9; the lead screw 4 is also fixedly connected with a self-locking device 7, and the self-locking device 7 can tightly clamp the lead screw 4 to prevent the lead screw 4 from rotating when the top end of the lead screw 4 is stressed.
Specifically, as shown in fig. 3-5, the self-locking device 7 is composed of a torsion spring bushing fixing seat 71, a torsion spring bushing 72, an active shifting fork 73, a passive shifting fork 74 and a torsion spring 75, wherein the torsion spring bushing 72 is fixedly connected to the inner wall of the torsion spring bushing fixing seat 71; the torsion spring 75 is in contact fit with the inner wall of the torsion spring bushing 72; the driving shifting fork 73 is fixedly connected with the transmission gear 9 and rotates along with the transmission gear 9; the passive shifting fork 74 is fixedly connected with the screw rod 4 through a key 76 and rotates along with the screw rod 4.
Further, as shown in fig. 6, the starting end and the terminal end of the torsion spring 75 are respectively bent with a first torsion spring corner 751 and a second torsion spring corner 752; the first torsion spring bend angle 751 and the second torsion spring bend angle 752 are respectively located at two sides of the driving fork 73, and corner grooves are formed at contact positions of the driving fork 73 and the first torsion spring bend angle 751 and the second torsion spring bend angle 752. When the electric push rod with the self-locking function needs to be lifted, the motor 8 is started, the transmission gear 9 drives the driving shift fork 73 to rotate under the driving of the motor 8, when the motor 8 rotates forwards, the driving shift fork 73 is preferentially contacted with the first torsion spring bend 751, when the motor 8 rotates backwards, the driving shift fork 73 is preferentially contacted with the second torsion spring bend 752, no matter the driving shift fork 73 is contacted with the first torsion spring bend 751 or the second torsion spring bend 752, the torsion spring 75 can contract inwards, so that the torsion spring 75 is in a follow-up rotation state, the driving shift fork 73 drives the driven shift fork 74 to rotate together with the screw rod 4, and the screw rod nut pair 5 on the screw rod 4 can drive the inner tube 2 and the mounting ring 3 to do linear motion; meanwhile, the inner tube 2 can be accelerated to retract under the influence of external pressure, and the self-locking device 7 can balance the motion state, so that the motion is kept at a constant speed; when the motor 8 rotates reversely, the electric push rod with the self-locking function retracts; when the electric push rod with the self-locking function needs to stop at a certain position, the motor 8 is stopped, the external pressure born by the mounting ring 3 is transmitted to the screw rod 4 through the screw-nut pair 5, so that the screw rod 4 generates reverse rotation, when the screw rod 4 rotates, the driven shifting fork 74 rotates along with the screw rod, so that the first torsion spring bend 751 and the second torsion spring bend 752 are contacted, the torsion spring 75 is outwards tensioned, but the torsion spring 75 is externally sleeved with the torsion spring bushing 72, and when the torsion spring bushing 72 is completely contacted, the driven shifting fork 74 cannot rotate, the screw rod 4 cannot rotate, so that the screw-nut pair 5 is ensured to maintain the existing position, and the self-locking purpose is achieved.
Specifically, please refer to fig. 1 and fig. 2, the screw-nut pair 5 is connected to the housing 1 by a nut guide sleeve 6 in a sliding manner, the side wall of the nut guide sleeve 6 is provided with a plurality of sliding blocks, and each side sliding block is located in a sliding groove corresponding to the inner wall of the housing 1; two limit switches 11 are arranged on the inner wall of the shell 1, and the two limit switches 11 are respectively positioned on two sides of the nut guide sleeve 6 and can limit the moving length of the nut guide sleeve 6; the screw rod 4 is rotatably connected with the shell 1 through a thrust ball bearing 10.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.
Claims (7)
1. The electric push rod with the self-locking function is characterized by comprising a shell (1), an inner pipe (2) and a mounting ring (3), wherein the inner pipe (2) is positioned in the shell (1) and can shuttle back and forth from an opening at the top end of the shell (1); the mounting ring (3) is fixedly connected to the top end of the inner pipe (2);
a screw rod (4) penetrates through the shell (1), and the tail end of the inner tube (2) is rotatably connected with the screw rod (4) through a screw rod nut pair (5);
the tail end of the screw rod (4) is connected with an output shaft of a motor (8) through a transmission gear (9);
the lead screw (4) is fixedly connected with a self-locking device (7), and the self-locking device (7) can clamp the lead screw (4) to prevent the lead screw (4) from rotating when the top end of the lead screw (4) is stressed.
2. The electric push rod with the self-locking function according to claim 1, wherein the self-locking device (7) is composed of a torsion spring bushing fixing seat (71), a torsion spring bushing (72), an active shifting fork (73), a passive shifting fork (74) and a torsion spring (75), and the torsion spring bushing (72) is fixedly connected to the inner wall of the torsion spring bushing fixing seat (71); the torsion spring (75) is in contact fit with the inner wall of the torsion spring bushing (72); the driving shifting fork (73) is fixedly connected with the transmission gear (9) and rotates along with the transmission gear (9); the passive shifting fork (74) is fixedly connected with the screw rod (4) through a key (76) and rotates along with the screw rod (4).
3. The electric putter with self-locking function according to claim 2, wherein the torsion spring (75) is bent at the beginning and end thereof with a first torsion spring bend angle (751) and a second torsion spring bend angle (752), respectively.
4. The electric putter with self-locking function according to claim 3, wherein the first torsion spring corner (751) and the second torsion spring corner (752) are respectively located at two sides of the driving fork (73), and the driving fork (73) is provided with a corner groove at the contact position with the first torsion spring corner (751) and the second torsion spring corner (752).
5. The electric push rod with the self-locking function according to claim 1, wherein the screw-nut pair (5) is slidably connected with the housing (1) through a nut guide sleeve (6), the side wall of the nut guide sleeve (6) is provided with a plurality of slide blocks, and each side slide block is located in a corresponding sliding groove in the inner wall of the housing (1).
6. The electric push rod with the self-locking function according to claim 5, wherein the inner wall of the housing (1) is provided with two limit switches (11), and the two limit switches (11) are respectively located at two sides of the nut guide sleeve (6) and can limit the moving length of the nut guide sleeve (6).
7. The electric push rod with the self-locking function according to claim 1, wherein the screw rod (4) is rotatably connected with the housing (1) through a thrust ball bearing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846808.2U CN212744913U (en) | 2020-05-19 | 2020-05-19 | Electric push rod with self-locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846808.2U CN212744913U (en) | 2020-05-19 | 2020-05-19 | Electric push rod with self-locking function |
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| Publication Number | Publication Date |
|---|---|
| CN212744913U true CN212744913U (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020846808.2U Active CN212744913U (en) | 2020-05-19 | 2020-05-19 | Electric push rod with self-locking function |
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| CN (1) | CN212744913U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839515A (en) * | 2021-09-30 | 2021-12-24 | 兰州万里航空机电有限责任公司 | Dual-redundancy roller screw pair actuator with anti-reversion mechanism |
-
2020
- 2020-05-19 CN CN202020846808.2U patent/CN212744913U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839515A (en) * | 2021-09-30 | 2021-12-24 | 兰州万里航空机电有限责任公司 | Dual-redundancy roller screw pair actuator with anti-reversion mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An electric push rod with self-locking function Effective date of registration: 20211115 Granted publication date: 20210319 Pledgee: Bank of Jiangsu Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: WUXI HONGBA MECHANICAL AND ELECTRICAL EQUIPMENT CO.,LTD. Registration number: Y2021320010471 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: No. 5 Lijiang Road, Xinwu District, Wuxi City, Jiangsu Province, 214111 Patentee after: Wuxi Hongba Electromechanical Co.,Ltd. Address before: No.5 Lijiang Road, Xinwu District, Wuxi City, Jiangsu Province Patentee before: WUXI HONGBA MECHANICAL AND ELECTRICAL EQUIPMENT CO.,LTD. |
|
| CP03 | Change of name, title or address | ||
| PM01 | Change of the registration of the contract for pledge of patent right |
Change date: 20240328 Registration number: Y2021320010471 Pledgor after: Wuxi Hongba Electromechanical Co.,Ltd. Pledgor before: WUXI HONGBA MECHANICAL AND ELECTRICAL EQUIPMENT CO.,LTD. |
|
| PM01 | Change of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210319 Pledgee: Bank of Jiangsu Limited by Share Ltd. Wuxi science and Technology Branch Pledgor: Wuxi Hongba Electromechanical Co.,Ltd. Registration number: Y2021320010471 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |