CN213585435U

CN213585435U - Motor and linear actuator with torsional spring self-locking mechanism

Info

Publication number: CN213585435U
Application number: CN202022406318.3U
Authority: CN
Inventors: 王永超; 张东行
Original assignee: Ningbo Haishikai Drive Technology Co ltd
Current assignee: Ningbo Haishikai Drive Technology Co ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-29
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a motor and linear actuator with torsional spring self-locking mechanism, which belongs to the technical field of motor self-locking, comprising a motor body and a motor shaft, wherein the torsional spring self-locking mechanism is sleeved outside the motor shaft and comprises a seat ring component and a torsional spring, the seat ring component is circumferentially fixed relative to the motor shaft and rotates along with the motor shaft, the torsional spring is wound and annularly arranged and elastically tightly presses the outer periphery of the seat ring component, one end of the torsional spring is fixed relative to the motor body, the screwing direction of the torsional spring is consistent with the reverse direction of the motor shaft, the seat ring component rotates along with the motor shaft, the self-locking is realized by utilizing the torsional spring to hold the seat ring component tightly, the structure is simpler and easier to realize, the self-locking force is larger at the same time, the self-locking effect is better, the stability is higher, and compared with, the noise is reduced, and the service life of the motor is prolonged.

Description

Motor and linear actuator with torsional spring self-locking mechanism

[ technical field ] A method for producing a semiconductor device

The utility model relates to a motor auto-lock technical field, concretely relates to motor and linear actuator with torsional spring self-locking mechanism.

[ background of the invention ]

The linear actuator is an actuator which is operated by converting a rotary motion into a linear motion, is commonly used in machine tools and industrial machinery, computer peripheral equipment (such as disk drives and printers), valves and air gates and many other places requiring linear motion, and for the linear actuator, self-locking is an essential function, for example, an electric lifting table, when a driving motor does not operate, the linear actuator is required to have self-locking capability to prevent the lifting table from automatically descending and returning, the self-locking mechanism of the current linear actuator comprises flexible self-locking on a lead screw and rigid self-locking on the motor, the flexible self-locking is realized by a brake torsion spring, the brake torsion spring is driven to be tightly held when the rotating lead screw rotates reversely to generate braking force, but the actuating self-locking force of the brake torsion spring on the lead screw is relatively insufficient, the self-locking effect is poor, the rigid self-locking comprises worm gear, however, the existing rigid self-locking mode has the defects of low motor efficiency when the self-locking performance is good, poor self-locking performance when the motor efficiency is low, irregular shapes of a plurality of manufacturing structures, difficulty in noise control, serious surface contact friction loss and shortened service life.

In utility model patent document No. CN103185084A, a motor with braking function for an actuator is disclosed, comprising: a motor body; the rotating shaft is connected in the center of the motor body in a penetrating way; the brake mechanism comprises a brake ring and a spiral spring, wherein the brake ring consists of a plurality of annular plates, the spiral spring is wound around the outer edge of each arc-shaped plate, and the arc-shaped plates are sleeved on the outer periphery of the rotating shaft together; and, backstop mechanism, the setting is between this motor body and this arrestment mechanism for the rotation of arbitrary this arc of restriction, will make coil spring and each arc produce radial expansion when clockwise rotation is done in the pivot, can make coil spring and each arc produce the radial shrinkage auto-lock when anticlockwise rotation is done in the pivot, the utility model discloses the arc relative motor of well braking ring is fixed to be set up, does not follow the pivot and rotates, and rotation axis and each arc friction braking when pivot anticlockwise rotation, braking auto-lock effect is relatively poor, and in order to realize the auto-lock, the pivot still need produce the friction with the pivot contact when clockwise rotation is done in the pivot, influences the pivot and normally rotates, causes the unnecessary energy consumption, and easy wearing and tearing.

[ summary of the invention ]

An object of the utility model is to design a can partly solve above-mentioned technical problem's motor that has torsional spring self-locking mechanism.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a motor with torsional spring self-locking mechanism, includes motor body and motor shaft, torsional spring self-locking mechanism suit is outside the motor shaft, torsional spring self-locking mechanism includes seat circle component and torsional spring, the relative motor shaft circumference of seat circle component is fixed and rotates along with the motor shaft, the torsional spring winding encircles and establishes and elasticity tightly compels the outer peripheral edges of seat circle component, the relative motor body of one end of torsional spring is fixed, the direction of screwing of torsional spring is unanimous with the reversal direction of motor shaft.

The beneficial effect of this scheme of adoption:

1. adopt on the motor the utility model provides a torsional spring self-locking structure, when the motor shaft corotation, the seat circle component is along with the synchronous corotation of motor shaft, the rotation direction is to the rotation of torsional spring against, the frictional force of torsional spring and seat circle component props the torsional spring big, the increase of torsional spring internal diameter, frictional force value between torsional spring and the seat circle reduces, can not influence the normal rotation operation of motor, avoid producing extra friction and heat, reduce the energy consumption, reduce wear and tear, reduce the replacement cost, when the motor shaft reversal, the seat circle component is along with the synchronous reversal of motor shaft, the rotation direction is unanimous with the direction of screwing of torsional spring, the frictional force of torsional spring and seat circle component drives the torsional spring locking, cause the increase of frictional force value, thereby lock more tightly.

2. The soft auto-lock of rotation lead screw is embraced to the braking torsional spring among the prior art, in order to realize the auto-lock and can not influence normal rotation again, it is higher to braking torsional spring processing precision requirement, adopt above-mentioned auto-lock structure, it is lower to torsional spring and seat circle component cooperation precision requirement, reduce the processing degree of difficulty, and compare in prior art and be used for each arc in actuating device's the motor of utensil braking function not along with motor shaft pivoted auto-lock structure, seat circle component rotates along with the motor shaft in this scheme, utilize the torsional spring to embrace seat circle component and realize the auto-lock, the structure is simpler, it is easier to realize, simultaneously, the auto-lock power is bigger, the auto-lock effect is better, stability is higher, compare in the rigidity auto-lock that worm auto-lock and helical gear formed simultaneously, the auto-lock mechanism in this scheme is relatively flexible, reduce.

3. The utility model provides a torsional spring self-locking mechanism only needs the suit outside the motor shaft, and simple structure is compact, and is small, saves installation space, and need not to change the motor original structure, sparingly revises the cost, can be applicable to simultaneously on various types of motors, and application range is wider, and the practicality is stronger.

4. The motor in the utility model can balance the motor propulsion and self-locking better, the motor output power is large, the torsion spring is expanded, the friction force is reduced, and the efficiency is high in the process of the motor positive rotation (the load is increased); in the motor reversal process (load descending), the output power of the motor is small, the torsion spring contracts, the friction force is increased, the efficiency is reduced, the output power of the motor is increased, and the numerical values of ascending and descending power, current and the like are balanced.

Preferably, the race member comprises a torsion spring seat sleeved on the motor shaft, the inner diameter of the torsion spring is slightly smaller than the outer diameter of the torsion spring seat, and the torsion spring seat form pre-tightening.

Preferably, the race member comprises a needle seat and needles, a plurality of needle grooves are formed in the outer wall of the needle seat, the needles are located in the needle grooves and partially protrude out of the needle grooves, and the inner diameter of the torsion spring is slightly smaller than the outer diameter of the rotation stroke of the needles.

Preferably, the plurality of needle roller grooves are uniformly distributed along the circumference of the needle roller seat.

Preferably, the motor further comprises a motor shell, and the motor shaft penetrates out of the motor shell.

Preferably, a tail seat is arranged at the tail end of the motor shell, and one end, close to the motor body, of the torsion spring is fixed on the tail seat.

Preferably, the shell further comprises a cover cap, the cover cap is detachably connected to the tail end of the shell body, and the torsion spring self-locking mechanism is located in the cover cap.

Preferably, one end of the torsion spring, which is far away from the motor body, is fixed on the cover.

Preferably, the race member is connected with the motor shaft by at least one of interference fit, flat connection, key connection and clamping.

The utility model discloses an another technical scheme as follows:

the linear actuator comprises an inner tube, an outer tube, a rotary screw rod and a motor with a torsional spring self-locking mechanism in any technical scheme, wherein the motor drives the rotary screw rod to rotate, the rotary screw rod drives a transmission nut to axially move when rotating, and the transmission nut moves to drive the inner tube and the outer tube to relatively contract.

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 utility model is further described with the following drawings:

fig. 1 is a schematic view of the three-dimensional structure of the motor with the torsion spring self-locking mechanism of the present invention.

Fig. 2 is an exploded view of a motor with a torsion spring self-locking mechanism according to an embodiment of the present invention.

Fig. 3 is a partial cross-sectional view of a motor with a torsion spring self-locking mechanism according to an embodiment of the present invention.

Fig. 4 is an exploded view of a motor with a torsion spring self-locking mechanism according to the second embodiment of the present invention.

Fig. 5 is a partial cross-sectional view of a motor with a torsion spring self-locking mechanism according to an embodiment of the present invention.

Reference numerals: a machine body 001; a motor housing 101; the motor shaft 002; a torsion spring self-locking mechanism 003; a torsion spring 1; a torsion spring seat 2; a needle rolling seat 3; a needle groove 301; a needle roller 4; a cover 004; a tail stock 005.

[ 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.

The first embodiment is as follows:

as shown in fig. 1 to 3, a motor with torsional spring self-locking mechanism, including motor body 001 and motor shaft 002, torsional spring self-locking mechanism 003 suit is outside motor shaft 002, torsional spring self-locking mechanism 003 includes seat circle component and torsional spring 1, the relative motor shaft 002 circumference of seat circle component is fixed and rotates along with motor shaft 002, torsional spring 1 winding ring is established and elasticity is tightly compelled in the seat circle component outer peripheral edges, the relative motor body 001 of one end of torsional spring 1 is fixed, the direction of screwing of torsional spring 1 is unanimous with the reversal direction of motor shaft 002.

Adopt on the motor the utility model provides a 1 self-locking structure of torsional spring, when motor shaft 002 corotation, the seat circle member is along with the synchronous corotation of motor shaft 002, the rotation direction is against the rotation direction of torsional spring 1, the frictional force of torsional spring 1 and seat circle member props 1 big with torsional spring, the increase of 1 internal diameter of torsional spring, frictional force value between torsional spring 1 and the seat circle reduces, can not influence the normal rotation operation of motor, avoid producing extra friction and heat, reduce the energy consumption, reduce wear and tear, reduce the replacement cost, when motor shaft 002 reversal, the seat circle member is along with the synchronous reversal of motor shaft 002, the rotation direction is unanimous with the direction of screwing of torsional spring 1, the frictional force of torsional spring 1 and seat circle member drives 1 locking, cause the increase of frictional force value, thereby it forms the auto-lock. In the prior art, the brake torsion spring 1 tightly holds the rotating screw rod for soft self-locking, in order to realize self-locking and not influence normal rotation, the requirement on the processing precision of the braking torsion spring 1 is higher, the self-locking structure has lower requirement on the matching precision of the torsion spring 1 and the seat ring member, the processing difficulty is reduced, compared with the prior art of self-locking structure that each arc-shaped plate in the motor with the braking function for the actuating device does not rotate along with the motor shaft 002, the seat ring member in the embodiment rotates along with the motor shaft 002, and the torsion spring 1 is utilized to hold the seat ring member tightly to realize self-locking, so that the structure is simpler and easier to realize, simultaneously, the self-locking force is larger, the self-locking effect is better, the stability is higher, and meanwhile, compared with rigid self-locking formed by worm and gear self-locking and helical gears, the self-locking mechanism in the embodiment is relatively flexible, abrasion among parts is reduced, noise is reduced, and the service life of the motor is prolonged. The utility model provides a torsional spring self-locking mechanism 003 only need the suit outside motor shaft 002, and simple structure is compact, and is small, saves installation space, and need not to change the motor original structure, saves the modification cost, can be applicable to various types of motors simultaneously on, application range is wider, and the practicality is stronger. The motor in the utility model can balance the motor propulsion and self-locking better, the motor output power is large, the torsion spring is 1 big, the friction force is reduced, and the efficiency is high in the process of the motor positive rotation (the load is increased); in the motor reversal process (load descending), the output power of the motor is small, the torsion spring 1 contracts, the friction force is increased, the efficiency is reduced, the output power of the motor is increased, and the numerical values of ascending and descending power, current and the like are balanced.

In this embodiment, the race member is connected to the motor shaft 002 through at least one of interference fit, flat position connection, key connection, and clamping to ensure that the two are circumferentially fixed relative to each other.

In order to simplify the structure, as shown in fig. 2 and fig. 3, the race member in this embodiment includes a torsion spring seat 2 sleeved on the motor shaft 002, the inner diameter of the torsion spring 1 is slightly smaller than the outer diameter of the torsion spring seat 2, the torsion spring 1 and the torsion spring seat 2 form a pre-tightening force, when the motor shaft 002 rotates, the torsion spring seat 2 is in sliding contact with the torsion spring 1, the pre-tightening force generates a friction force, the torsion spring seat is a plastic seat or a metal seat, when the motor shaft 002 rotates forwards, the torsion spring seat 2 rotates forwards synchronously, the friction force expands the torsion spring 1, the normal operation of the motor is not affected, when the motor shaft 002 rotates backwards, the torsion spring seat 2 rotates backwards synchronously, the friction force locks the torsion.

For better protection motor, as shown in fig. 1-3, the motor still includes motor casing 101, motor shaft 002 wears out outside motor casing 101, the tail end of motor casing 101 is equipped with shroud 004, shroud 004 can be dismantled with motor casing 101 and be connected,

motor shaft

002 and 1 auto-lock structure of torsional spring are located shroud 004 to form better protection to it, the one end that motor body 001 was kept away from to torsional spring 1 is fixed on shroud 004, the other end of torsional spring 1 is the free end, so that torsional spring 1 rises greatly or contracts when rotating along with the motor.

As shown in fig. 2 and fig. 3, the tail end of the motor housing 101 is further provided with a tail seat 005, the tail seat 005 is located in the cover 004, in order to fix the torsion spring 1, one end of the torsion spring 1 close to the motor body 001 may be fixed on the tail seat 005, and the other end of the torsion spring 1 is a free end, so that the torsion spring 1 expands or contracts when rotating with the motor.

Example two:

as shown in fig. 4 and 5, the present embodiment is different from the first embodiment in that the race member includes a needle holder 3 and needles 4, a plurality of needle grooves 301 are formed on an outer wall of the needle holder 3, the needles 4 are located in the needle grooves 301 and partially protrude from the needle grooves 301, and an inner diameter of the torsion spring 1 is slightly smaller than an outer diameter of a rotational stroke of the needles 4.

The outer diameter of the rotation stroke of the roller pin 4 refers to the outer diameter of a circle formed by the outermost vertex of the roller pin 4 in the rotation process, by adopting the structure in the embodiment, when the motor shaft 002 rotates, the roller pin 4 is in sliding contact with the torsion spring 1, the pretightening force generates friction force, when the motor shaft 002 rotates forwards, the roller pin seat 3 provided with the roller pin 4 rotates forwards synchronously, the friction force expands the torsion spring 1, the normal operation of the motor is not influenced, when the motor shaft 002 rotates backwards, the roller pin seat 3 provided with the roller pin 4 rotates backwards synchronously, the friction force locks the torsion spring 1, and the friction force is increased to.

In order to keep the coaxiality of the torsion spring 1 and the needle seat 3, the plurality of needle roller grooves 301 are uniformly distributed along the circumference of the needle roller seat 3, so that the stress of the whole circumference of the needle roller grooves 301 is uniform when the needle roller is held tightly, and the stress concentration and the breakage caused by overlarge local stress are avoided.

Example three:

a linear actuator comprises an inner tube, an outer tube, a rotating screw rod and a motor with a torsion spring self-locking mechanism in any embodiment, wherein the motor drives the rotating screw rod to rotate, the rotating screw rod drives a transmission nut to move axially when rotating, and the transmission nut moves to drive the inner tube and the outer tube to contract relatively.

The above description is only for the embodiments of the present invention, but the 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 description in the above embodiments and the accompanying drawings. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides a motor with torsional spring self-locking mechanism, includes motor body and motor shaft, torsional spring self-locking mechanism suit is outside the motor shaft, a serial communication port, torsional spring self-locking mechanism includes seat circle component and torsional spring, the relative motor shaft circumference of seat circle component is fixed and rotates along with the motor shaft, the torsional spring winding ring is established and elasticity is compelled the outer peripheral edges of seat circle component tightly, the relative motor body of one end of torsional spring is fixed, the direction of screwing of torsional spring is unanimous with the reversal direction of motor shaft.

2. The motor with the torsion spring self-locking mechanism according to claim 1, wherein the race member includes a torsion spring seat fitted over the motor shaft, the inner diameter of the torsion spring is slightly smaller than the outer diameter of the torsion spring seat, and the torsion spring seat form a pre-tightening force.

3. The motor with torsion spring self-locking mechanism according to claim 1, wherein the race member includes a needle seat and a needle roller, the needle seat has a plurality of needle roller grooves on an outer wall thereof, the needle roller is disposed in the needle roller groove and partially protrudes from the needle roller groove, and the inner diameter of the torsion spring is slightly smaller than the outer diameter of the needle roller in the rotational stroke.

4. The motor with torsion spring self-locking mechanism according to claim 3, wherein the plurality of needle grooves are uniformly distributed along the circumference of the needle seat.

5. The motor with torsion spring self-locking mechanism according to claim 1, further comprising a motor housing, wherein the motor shaft penetrates out of the motor housing.

6. The motor with the torsion spring self-locking mechanism according to claim 5, wherein the tail end of the motor housing is provided with a tail seat, and one end of the torsion spring close to the motor body is fixed on the tail seat.

7. The motor with the torsion spring self-locking mechanism according to claim 5 or 6, further comprising a cover, wherein the cover is detachably connected to the tail end of the housing body, and the torsion spring self-locking mechanism is located in the cover.

8. The motor with the torsion spring self-locking mechanism according to claim 7, wherein one end of the torsion spring away from the motor body is fixed on the cover.

9. The motor with torsion spring self-locking mechanism according to claim 1, wherein the race member is connected to the motor shaft by at least one of interference fit, flat connection, keyed connection, and snap connection.

10. A linear actuator comprises an inner tube, an outer tube and a rotating lead screw, and is characterized by further comprising a motor with a torsion spring self-locking mechanism as claimed in any one of claims 1 to 9, wherein the motor drives the rotating lead screw to rotate, the rotating lead screw drives a transmission nut to move axially when rotating, and the transmission nut moves to drive the inner tube and the outer tube to contract relatively.