CN214499942U - Self-locking device of electric actuating mechanism and electric actuating mechanism - Google Patents
Self-locking device of electric actuating mechanism and electric actuating mechanism Download PDFInfo
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- CN214499942U CN214499942U CN202120117019.XU CN202120117019U CN214499942U CN 214499942 U CN214499942 U CN 214499942U CN 202120117019 U CN202120117019 U CN 202120117019U CN 214499942 U CN214499942 U CN 214499942U
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Abstract
The utility model discloses a self-locking device of an electric actuator and an electric actuator, which belong to the field of linear brake equipment and can enhance the self-locking capability of the electric actuator, and the self-locking device of the electric actuator comprises a one-way bearing and a friction seat, wherein the one-way bearing is provided with an inner ring and an outer ring, the inner ring is sheathed on a transmission lead screw of the electric actuator, the friction seat is arranged on the outer ring and fixed in the electric actuator, when the transmission lead screw rotates forwards, the inner ring rotates relative to the outer ring, when the transmission lead screw rotates backwards, the inner ring drives the outer ring to rotate, the friction seat is provided with a radial friction part and an axial friction part, the radial friction part is contacted with the outer periphery of the outer ring, the axial friction part is contacted with the end part of the outer ring, so that when the transmission lead screw has the tendency of reverse rotation, and a circumferential self-locking force is generated between the outer ring and the friction seat.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a linear braking equipment field especially relates to electric actuator's self-lock device and electric actuator.
[ background of the invention ]
The traditional electric push rod is usually matched with a worm gear by adopting a torsion spring for realizing self-locking of the mechanism. The tolerance among the actual course of working of torsional spring is not well controlled, and in order not to wear and tear the worm wheel, the smooth finish requirement to the torsional spring is higher, lead to the torsional spring processing degree of difficulty to increase, the push rod operation in-process, the torsional spring position can the drunkenness, lead to the production of abnormal sound, torsional spring and worm wheel realize the mechanism auto-lock through certain magnitude of interference, the worm wheel is the plastic material, can't bear high temperature yielding, in the batch production, the magnitude of interference of torsional spring and worm wheel can't guarantee unanimously, current value size when leading to the push rod to retract is unstable, the current is inconsistent when the no-load stretches out and retracts.
[ Utility model ] content
The utility model aims to solve the technical problem that overcome the not enough and propose electric actuator's self-lock device of prior art, can strengthen electric actuator's auto-lock ability.
In order to solve the technical problem, the utility model adopts the following technical scheme:
electric actuator's self-lock device, including one-way bearing and friction seat, one-way bearing has inner circle and outer lane, the inner circle suit is in on electric actuator's the drive lead screw, the friction seat is in just fix on the outer lane in the electric actuator, when drive lead screw corotation, the inner circle is relative the outer lane rotates, when drive lead screw reversal, the inner circle drives the outer lane rotates, the friction seat has radial friction portion and axial friction portion, radial friction portion with the periphery contact of outer lane, axial friction portion with the tip contact of outer lane, with when drive lead screw has the reversal trend, the outer lane with produce circumference auto-lock power between the friction seat.
The utility model discloses a self-lock device for electric actuator, can produce the auto-lock power, avoid the transmission lead screw reversal to reset, unidirectional through the one-way bearing makes its outer lane and friction seat cooperation, realize the auto-lock, when the transmission lead screw forward rotates, can drive the object and rise, the inner circle rotates along with the transmission lead screw this moment, keep rotating relatively with the outer lane, there is no frictional force between outer lane and the friction seat, after the transmission lead screw stops rotating, when it has the trend of reversal, because unidirectional of the one-way bearing, the inner circle can drive the outer lane and rotate synchronously, frictional force can be produced between outer lane and the friction seat, block the reverse rotation of transmission lead screw, the abnormal sound can not appear yet in the auto-lock, and the size of current value can keep stable in the corotation of transmission lead screw and reversal;
the periphery of the outer ring is contacted with a radial friction part of the friction seat, the end part of the outer ring is contacted with an axial friction part of the friction seat, when the outer ring rotates relative to the friction seat, the friction force in the circumferential direction of the transmission screw rod can be generated, the axial friction part can be used as a supporting part for the one-way bearing, the load gravity borne by the transmission screw rod and the gravity of the transmission screw rod can act on the axial friction part through the outer ring, the friction force between the outer ring and the friction seat can be increased, the one-way bearing can be prevented from falling off from the transmission screw rod, if the axial friction part is lacked, the friction force between the outer ring and the radial friction part not only acts on the circumferential direction of the transmission screw rod, but also can generate the friction force in the axial direction of the transmission screw rod, but not belongs to a part of self-locking force, when the transmission screw rod has the tendency of reverse rotation, the static friction force is generated between the outer ring and the friction seat, the static friction force is self-locking force, so that the transmission screw rod is prevented from reversing, and the larger the weight of the load on the transmission screw rod is, the larger the friction force generated between the outer ring and the friction seat is, so that the self-locking capability of the electric actuating mechanism is enhanced;
when the load on the transmission screw rod needs to be controlled to move downwards, the transmission screw rod is controlled to rotate reversely, and the power in the reverse rotation process is far greater than the static friction force between the outer ring and the friction seat, so that the friction force can be overcome to enable the load to be reduced.
Furthermore, a transmission piece is sleeved outside the transmission screw rod, and the lower end of the transmission piece is abutted to the upper end of the outer ring. The gravity loaded on the transmission screw rod can increase the downward pressure of the transmission screw rod, the pressure acts on the transmission piece and acts on the outer ring through the transmission piece, so that the pressure of the outer ring acting on the friction seat is increased, the friction force is improved, the transmission screw rod does not directly conduct the acting force to the inner ring and then transfers the acting force to the outer ring through the inner ring, and the friction force of the inner ring and the outer ring in relative rotation can be reduced.
Further, the transmission part comprises a gasket and a plane bearing, the gasket is connected with the transmission screw rod, the plane bearing is in clearance fit with the transmission screw rod, the upper end of the plane bearing is abutted against the gasket, and the lower end of the plane bearing is abutted against the outer ring. The upper end and the lower end of the plane bearing can rotate relatively, the transmission screw rod transmits downward pressure to the plane bearing through the gasket, so that tight connection does not need to be carried out between the plane bearing and the transmission screw rod, friction force influencing transmission of the plane bearing cannot be generated between the transmission screw rod and the plane bearing when the transmission screw rod rotates, the upper end of the plane bearing, which is abutted against the gasket, can move synchronously along with the gasket, and the lower end of the plane bearing, which is abutted against the outer ring, can move synchronously along with the outer ring.
Further, the periphery of the gasket extends downwards to cover the upper end of the plane bearing. The periphery of the gasket extends downwards to form a circular area at the lower end of the gasket so as to limit the plane bearing inside and limit the radial displacement of the plane bearing, thus avoiding the contact of the plane bearing and the transmission screw rod and further avoiding influencing the normal transmission of the plane bearing.
Further, the upper end of the outer ring is higher than the upper end of the inner ring. The design can avoid the inner ring to contact with the plane bearing, thereby preventing the inner ring from generating friction force between the inner ring and the plane bearing when rotating relative to the outer ring or driving the lower end of the plane bearing to rotate so as to generate friction force between the lower end of the plane bearing and the outer ring.
Further, the radial friction part surrounds the outer side of the outer ring, the axial friction part is formed by extending the end part of the radial friction part to the transmission screw rod, and a gap exists between the axial friction part and the transmission screw rod. The transmission screw rod can not contact with the axial friction part to generate friction when rotating, and meanwhile, the inner ring can also avoid contacting with the axial friction part due to the existence of the gap, so that the friction force is reduced.
Furthermore, the friction seat is a metal piece or a plastic piece. The metal piece has good wear resistance and high strength; the plastic part has high friction coefficient and low noise generated during friction.
The electric actuating mechanism comprises a driving piece, a transmission nut, an inner tube, an outer tube and the self-locking device of the electric actuating mechanism, wherein the transmission screw rod is driven to rotate by the driving piece, the transmission nut is in axial movement when the transmission screw rod rotates, the transmission nut drives the inner tube to stretch relative to the outer tube, and the friction seat is fixedly installed on the outer tube through a screw.
The electric actuator adopts the self-locking device, the noise generated in the operation process of the electric actuator can be reduced, and the self-locking force which hinders the transmission screw rod from having the reversal reset trend can be generated, the transmission screw rod can be driven to rotate through the driving piece, the transmission nut can move along the axial direction of the transmission screw rod when the transmission screw rod rotates, and the inner tube is driven to move axially, the friction seat is fixedly arranged on the outer tube and keeps static with the outer tube, so that the stable friction force can be provided when the transmission screw rod has the reversal trend, the self-locking device can also play the radial limiting role of the transmission screw rod, and the shaking in the rotation process of the transmission screw rod is reduced.
Further, still include the transmission shell, the outer tube with the transmission shell is connected, the transmission lead screw stretches into in the transmission shell, the driving piece with the transmission shell is connected, be equipped with the transmission part in the transmission shell, be used for with the power transmission of driving piece extremely on the transmission lead screw, self-lock device set up in the transmission shell. After the driving part runs, the power of the driving part can be converted into the power for rotating the transmission screw rod through the transmission part, and the transmission shell can block external dust from being accumulated on the self-locking device and the transmission part, so that the self-locking effect of the self-locking device and the transmission capacity of the transmission part are influenced.
Furthermore, the transmission shell comprises a first shell and a second shell which are connected with each other, and a shaft shoulder is arranged on the first shell and used for limiting the upward displacement of the self-locking device. The first shell and the second shell can form a transmission shell in a splicing mode, the self-locking device and the transmission part can be arranged after the first shell is installed firstly in the installation process, the installation and operation can be facilitated, the upward displacement of the self-locking device can be limited through the shaft shoulder of the first shell, the downward displacement of the one-way bearing can be limited due to the fixation of the friction seat and the outer tube, and therefore the axial displacement of the self-locking device is limited.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention will be further explained with reference to the drawings:
fig. 1 is a schematic structural view of a transmission screw rod with a self-locking device in an embodiment of the present invention;
fig. 2 is an exploded view of a driving screw rod with a self-locking device in an embodiment of the present invention;
fig. 3 is a cross-sectional view of the self-locking device in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electric actuator according to an embodiment of the present invention;
fig. 5 is an exploded view of an electric actuator according to an embodiment of the present invention;
fig. 6 is another exploded view of the electric actuator according to the embodiment of the present invention.
Reference numerals:
one-way bearing 100, inner race 110, outer race 120;
a friction seat 200, a radial friction part 210 and an axial friction part 220;
the transmission screw 300, the driving piece 310, the transmission nut 320, the inner tube 330, the outer tube 340, the transmission housing 350, the first shell 351, the second shell 352 and the transmission part 360;
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 to 3, the embodiment of the present invention discloses a self-locking device for an electric actuator, including a one-way bearing 100 and a friction seat 200, the one-way bearing 100 has an inner ring 110 and an outer ring 120, the inner ring 110 is sleeved on a transmission screw 300 of the electric actuator, the friction seat 200 is fixed on the outer ring 120 and in the electric actuator, when the transmission screw 300 rotates forwards, the inner ring 110 rotates relative to the outer ring 120, when the transmission screw 300 rotates backwards, the inner ring 110 drives the outer ring 120 to rotate, the friction seat 200 has a radial friction portion 210 and an axial friction portion 220, the radial friction portion 210 contacts with the outer periphery of the outer ring 120, the axial friction portion 220 contacts with the end of the outer ring 120, so that when the transmission screw 200 has a reverse rotation tendency, a circumferential self-locking force is generated between the outer ring 120 and the friction seat 200.
The utility model discloses a self-locking device for electric actuator, can produce the auto-lock power, avoid the transmission lead screw reversal to reset, make its outer lane 120 and friction seat 200 cooperate through the unidirectionality of one-way bearing 100, realize the auto-lock, when transmission lead screw 300 forward rotates, can drive the object to rise, inner circle 110 rotates along with transmission lead screw 300 at this moment, keep rotating relatively with outer lane 120, there is no friction between outer lane 120 and the friction seat 200, after transmission lead screw 300 stops rotating, when it has the trend of reversal, because the unidirectionality of one-way bearing 100, inner circle 110 can drive outer lane 120 synchronous revolution, can produce the friction between outer lane 120 and the friction seat 200, block the reverse rotation of transmission lead screw 300, can not appear the abnormal sound when the auto-lock, and the size of the current value can keep stable when transmission lead screw 300 corotation and reversal, friction seat 200 can be made for the metal material, the metal piece has good wear resistance and high strength, and can also be made of plastic materials, the rubber piece has high friction coefficient, and the noise generated during friction is low;
the outer circumference of the outer ring 120 contacts with the radial friction part 210 of the friction seat 200, the end of the outer ring 120 contacts with the axial friction part 220 of the friction seat 200, when the outer ring 120 rotates relative to the friction seat 200, the friction force in the circumferential direction of the drive screw 300 can be generated, the axial friction part 220 can be used as a support component for the one-way bearing 100, the load gravity borne by the drive screw 300 and the gravity of the drive screw 300 can act on the axial friction part 220 through the outer ring 120, the friction force between the outer ring 120 and the friction seat 200 can be increased, the one-way bearing 100 can be prevented from falling off from the drive screw 300, if the axial friction part 220 is lacked, the friction force in the axial direction of the drive screw 300 can be generated between the outer ring 120 and the radial friction part 210 besides the friction force in the circumferential direction of the drive screw 300, but the friction force does not belong to a part of self-locking force, when the drive screw 300 has a tendency of reverse rotation, static friction force is generated between the outer ring 120 and the friction seat 200, and the static friction force is self-locking force, so that the transmission screw rod 300 is prevented from reversing, and the larger the weight of the load on the transmission screw rod 300 is, the larger the friction force generated between the outer ring 120 and the friction seat 200 is, so that the self-locking capability of the electric actuating mechanism is enhanced;
when the load on the driving screw 300 needs to be controlled to move downwards, the driving screw 300 is controlled to rotate reversely, and the power in the reverse rotation is far greater than the static friction force between the outer ring 120 and the friction seat 200, so that the friction force can be overcome to reduce the load.
The self-locking device can change the magnitude of the self-locking force according to the load weight on the transmission screw rod 300, if the transmission screw rod 300 transmits the load and the self gravity to the outer ring 120 through the inner ring 110, and then the friction force between the outer ring 120 and the friction seat 200 is increased, so that the friction force between the outer ring 120 and the inner ring 110 is increased, when the transmission screw rod 300 rotates forwards, a certain abrasion is also generated between the outer ring 120 and the inner ring 110, and the one-way bearing 100 is easily damaged after long-time use, therefore, a transmission member 400 is further arranged on the transmission screw rod 300, the transmission screw rod 300 can directly act the pressure of the load on the outer ring 120 through the transmission member 400, specifically, the lower end of the transmission member 400 is abutted against the upper end of the outer ring 120, so that the gravity load on the transmission screw rod 300 and the self gravity can act on the transmission member 400 and then be transmitted to the outer ring 120, the pressure of the outer race 120 on the friction seat 200 is increased, and the friction force is increased.
Because the transmission member 400 is connected to the driving screw 300, and can keep synchronous motion along with the driving screw 300, and the lower end of the transmission member 400 abuts against the outer ring 120, when the driving screw 300 rotates in the forward direction, unnecessary friction force is generated between the transmission member 400 and the outer ring 120, in the utility model, the transmission member 400 is composed of two parts, namely a gasket 410 and a plane bearing 420, wherein the gasket 410 is connected to the driving screw 300, the plane bearing 420 is in clearance fit with the driving screw 300, the upper end of the plane bearing 420 abuts against the gasket 410, the lower end abuts against the outer ring 120, the upper end and the lower end of the plane bearing 420 can rotate relatively, the driving screw 300 transmits downward pressure to the plane bearing 420 through the gasket 410, so that tight connection between the plane bearing 420 and the driving screw 300 is not needed, and thus, friction force influencing the transmission of the plane bearing 420 is not generated between the driving screw 300 and the plane bearing 420 when the driving screw 300 rotates, the upper end of the plane bearing 420 abutting against the gasket 410 can move synchronously with the gasket 410, and the lower end abutting against the outer ring 120 can keep moving synchronously with the outer ring 120.
Further, in order to ensure that the transmission screw 300 does not rub the plane bearing 420 during operation, the periphery of the spacer 410 extends downward to cover the upper end of the plane bearing 420, and the periphery of the spacer 410 extends downward to form a circular area at the lower end of the spacer 410, so that the radial displacement of the plane bearing 420 can be limited, and thus the plane bearing 420 can be prevented from contacting the transmission screw 300 due to the radial displacement during operation.
Based on the above embodiment, in order to avoid generating friction between the self-locking device and the driving screw rod when the driving screw rod rotates forward, in another embodiment of the present invention, referring to fig. 3, the upper end of the outer ring 120 is higher than the upper end of the inner ring 110, so the design can avoid the contact between the inner ring 110 and the flat bearing 420, thereby preventing the friction force generated between the inner ring 110 and the flat bearing 420 or the lower end of the flat bearing 420 from rotating when the inner ring 110 rotates relative to the outer ring 120, so as to generate the friction force between the lower end of the flat bearing 420 and the outer ring 120.
The radial friction part 210 surrounds the outer ring 120, the axial friction part 220 is formed by extending the end part of the radial friction part 210 to the transmission screw rod 300, a gap exists between the axial friction part 220 and the transmission screw rod 300, the transmission screw rod 300 cannot be contacted with the axial friction part 220 to generate friction when rotating, and meanwhile, the inner ring 110 can be prevented from being contacted with the axial friction part 220 due to the existence of the gap, so that the friction force is reduced.
Referring to fig. 4 to 6, the present invention further discloses an electric actuator, including a driving member 310, a driving nut 320, an inner tube 330, an outer tube 340 and the self-locking device of the electric actuator, wherein the driving screw 300 is driven by the driving member 310 to rotate, the driving nut 320 moves axially when the driving screw 300 rotates, the driving nut 320 drives the inner tube 330 to stretch and contract relative to the outer tube 340, and the friction seat 200 is fixedly mounted on the outer tube 340 through screws.
The electric actuator adopts the self-locking device, noise in the operation process of the electric actuator can be reduced, self-locking force which prevents the transmission screw rod 300 from having a reversal reset trend can be generated, the transmission screw rod 300 can be driven to rotate through the driving piece 310, the transmission nut 320 can move along the axial direction of the transmission screw rod 300 when the transmission screw rod 300 rotates, the inner tube 330 is driven to move axially, the friction seat 200 is fixedly arranged on the outer tube 340 and keeps static with the outer tube 340, stable friction force can be provided when the transmission screw rod 300 has a reversal trend, the self-locking device can also play a role in radially limiting the transmission screw rod 300, and shaking in the rotation process of the transmission screw rod 300 is reduced.
Further, electric actuator still includes transmission housing 350, outer tube 340 is connected with transmission housing 350, drive screw 300 stretches into in the transmission housing 350, driving piece 310 is connected with transmission housing 350, be equipped with drive disk assembly 360 in the transmission housing 350, be used for with the power transmission of driving piece 310 to drive screw 300 on, driving piece 310 operation back, can turn into drive screw 300 pivoted power with the power of driving piece 310 through drive disk assembly 360, self-lock device sets up in transmission housing 350, transmission housing 350 can block external dust and pile up on self-lock device and drive disk assembly 360, thereby influence self-lock device's auto-lock effect and drive disk assembly 360's transmission capacity.
In order to carry out axial spacing to self-lock device, transmission shell 350 is including first casing 351 and the second casing 352 of connecting each other, be equipped with the shaft shoulder (not drawn in the picture) on the first casing 351, the edge of shaft shoulder and driving medium 400 offsets, can restrict the ascending displacement of self-lock device, friction seat 200 and outer tube 340's fixed, can restrict the decurrent displacement of one-way bearing 100, thereby the axial displacement of self-lock device has been restricted, transmission shell 350 can be constituteed through the mode of concatenation to first casing 351 and second casing 352, can install earlier in the installation behind first casing 351 arranging self-lock device and transmission part 360, can conveniently install the operation.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. The self-locking device of the electric actuating mechanism is characterized by comprising a one-way bearing and a friction seat, wherein the one-way bearing is provided with an inner ring and an outer ring, the inner ring is sleeved on a transmission screw rod of the electric actuating mechanism, the friction seat is arranged on the outer ring and fixed in the electric actuating mechanism, when the transmission screw rod rotates forwards, the inner ring is opposite to the outer ring, when the transmission screw rod rotates backwards, the inner ring drives the outer ring to rotate, the friction seat is provided with a radial friction part and an axial friction part, the radial friction part is in contact with the periphery of the outer ring, and the axial friction part is in contact with the end part of the outer ring, so that when the transmission screw rod has a reverse rotation trend, the outer ring and the friction seat generate circumferential self-locking force.
2. The self-locking device of an electric actuator according to claim 1, wherein the driving screw is further sleeved with a driving member, and a lower end of the driving member abuts against an upper end of the outer ring.
3. The self-locking device of an electric actuator according to claim 2, wherein the transmission member comprises a spacer and a flat bearing, the spacer is connected with the transmission screw rod, the flat bearing is in clearance fit with the transmission screw rod, the upper end of the flat bearing abuts against the spacer, and the lower end of the flat bearing abuts against the outer ring.
4. The self-locking device for electric actuator according to claim 3, wherein the gasket has a periphery extending downward to enclose the upper end of the flat bearing.
5. The self-locking device of an electric actuator according to claim 3, wherein the upper end of the outer ring is higher than the upper end of the inner ring.
6. The self-lock device of an electric actuator according to any one of claims 1 to 5, wherein the radial friction portion surrounds the outer ring, the axial friction portion is formed by extending an end portion of the radial friction portion toward the drive screw, and a gap is formed between the axial friction portion and the drive screw.
7. The self-locking device of an electric actuator according to any one of claims 1 to 5, wherein the friction seat is a metal or plastic member.
8. The electric actuator is characterized by comprising a driving piece, a transmission nut, an inner pipe, an outer pipe and the self-locking device of the electric actuator as claimed in any one of claims 1 to 7, wherein the transmission screw rod is driven by the driving piece to rotate, the transmission nut moves in the axial direction when the transmission screw rod rotates, the transmission nut drives the inner pipe to stretch relative to the outer pipe, and the friction seat is fixedly arranged on the outer pipe through a screw.
9. The electric actuator according to claim 8, further comprising a transmission housing, wherein the outer tube is connected to the transmission housing, the transmission screw rod extends into the transmission housing, the driving member is connected to the transmission housing, a transmission member is disposed in the transmission housing for transmitting the power of the driving member to the transmission screw rod, and the self-locking device is disposed in the transmission housing.
10. The electric actuator according to claim 9, wherein the transmission housing comprises a first housing and a second housing connected to each other, the first housing having a shoulder thereon for limiting upward displacement of the self-locking device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120117019.XU CN214499942U (en) | 2021-01-14 | 2021-01-14 | Self-locking device of electric actuating mechanism and electric actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120117019.XU CN214499942U (en) | 2021-01-14 | 2021-01-14 | Self-locking device of electric actuating mechanism and electric actuating mechanism |
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| CN214499942U true CN214499942U (en) | 2021-10-26 |
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| CN202120117019.XU Active CN214499942U (en) | 2021-01-14 | 2021-01-14 | Self-locking device of electric actuating mechanism and electric actuating mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771874A (en) * | 2023-08-16 | 2023-09-19 | 康辉医疗科技(苏州)有限公司 | Lifting type anti-reversing transmission device with screw rod |
-
2021
- 2021-01-14 CN CN202120117019.XU patent/CN214499942U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771874A (en) * | 2023-08-16 | 2023-09-19 | 康辉医疗科技(苏州)有限公司 | Lifting type anti-reversing transmission device with screw rod |
| CN116771874B (en) * | 2023-08-16 | 2023-11-14 | 康辉医疗科技(苏州)有限公司 | Lifting type anti-reversing transmission device with screw rod |
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