CN106969109B - Actuator convenient to disassemble and assemble - Google Patents

Actuator convenient to disassemble and assemble Download PDF

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Publication number
CN106969109B
CN106969109B CN201710222846.3A CN201710222846A CN106969109B CN 106969109 B CN106969109 B CN 106969109B CN 201710222846 A CN201710222846 A CN 201710222846A CN 106969109 B CN106969109 B CN 106969109B
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CN
China
Prior art keywords
gear
module
transmission
actuator
drive
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CN201710222846.3A
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Chinese (zh)
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CN106969109A (en
Inventor
陆小健
胡仁昌
邢科亮
邓玉波
翟鑫
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Zhejiang Wendao Intelligent Equipment Co ltd
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Zhejiang Wendao Intelligent Equipment Co ltd
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Priority to CN201710222846.3A priority Critical patent/CN106969109B/en
Publication of CN106969109A publication Critical patent/CN106969109A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2031—Actuator casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/209—Arrangements for driving the actuator using worm gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H2025/2062—Arrangements for driving the actuator
    • F16H2025/2093—Arrangements for driving the actuator using conical gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • F16H2057/0235—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly specially adapted to allow easy accessibility and repair

Abstract

The invention discloses an actuator convenient to disassemble and assemble, which belongs to the technical field of transmission and comprises a motor and a telescopic assembly which is driven by the motor to realize telescopic operation, wherein the motor is connected with a driving worm, the telescopic assembly is connected with a driven gear, the driving worm drives the driven gear to rotate, the actuator further comprises a first transmission tooth and a second transmission tooth which are arranged between the driving worm and the driven gear, the first transmission tooth is in transmission connection with the driving worm, the second transmission tooth is in transmission connection with the driven gear, and the first transmission tooth and the second transmission tooth are mutually spliced to realize coupling. The invention has the advantage that the transmission part between the actuator telescopic component and the motor is more convenient to assemble and disassemble. The invention can be applied to household and medical equipment.

Description

Actuator convenient to disassemble and assemble
[ field of technology ]
The invention relates to an actuator convenient to disassemble and assemble, and belongs to the technical field of linear transmission.
[ background Art ]
Linear actuators, also known as pushrods, are widely used in the field of household and medical devices, and generally comprise a motor and a telescopic assembly, which can be driven by the motor to realize the telescopic function, so as to realize the function of pushing the target to move.
The existing linear actuator is usually single worm gear and worm one-stage speed reduction transmission, namely, a motor is connected with a driving worm, a telescopic component is connected with a driven worm gear, and the existing linear actuator has two-stage speed reduction transmission and even multi-stage speed reduction transmission, namely, a gear set is additionally arranged between the driving worm and the driven worm gear, but the linear actuator with the multi-stage transmission has certain problems: especially, the gear set part added in the middle is meshed with the driving worm wheel on one hand and meshed with the driven worm wheel on the other hand, so that the two aspects of meshing are combined in the assembly process, and the assembly is complicated; also, when one of the components of the gear set is replaced, the complete machine needs to be removed to realize replacement, which is very troublesome.
[ invention ]
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the actuator with convenient disassembly and assembly, so that the disassembly and assembly of the transmission part between the actuator telescopic assembly and the motor are more convenient.
The technical problems are solved, and the invention adopts the following technical scheme:
the utility model provides a convenient actuator of easy dismounting, includes the motor and realizes flexible subassembly under motor drive, the motor is connected with drive worm, flexible subassembly is connected with driven gear, drive worm drives driven gear rotates, the actuator is still including establishing first drive tooth and the second drive tooth between drive worm wheel and the driven gear, first drive tooth is connected with drive worm transmission, and the second drive tooth is connected with driven gear transmission, peg graft each other between first drive tooth and the second drive tooth and realize shaft coupling transmission.
The beneficial effects of the invention are that: in the actuator, an intermediate transmission gear set, namely a first transmission gear and a second transmission gear, is added between the driving worm and the driven gear, which is equivalent to multi-stage gear transmission, and of course, the intermediate transmission gear set on the side is not limited to the one-stage gear transmission, but can be a two-stage gear transmission, for example, a third transmission gear can be added between the first transmission gear and the driving worm, a fourth transmission gear is added between the second transmission gear and the driven gear, and the intermediate transmission gear set described below is exemplified by the one-stage gear transmission. An intermediate transmission gear set is added between the driving worm and the driven gear, so that the speed reduction and the improvement of the transmission torque can be further realized.
In addition, the key point of the invention is that the middle transmission gear set is designed in a split way, the first transmission gear and the second transmission gear are mutually independent, and when the middle transmission gear set is installed, the first transmission gear and the second transmission gear are coupled in an inserting way, after the design, the first transmission gear only needs to be meshed with the driving worm, the second transmission gear only needs to be meshed with the driven gear, after that, the first transmission gear and the second transmission gear are mutually inserted to realize the transmission of the whole actuator.
The conventional assembly mode needs to use the device for realizing the alignment engagement between the tooth surfaces of the transmission teeth and the tooth surfaces of the driving worm and the driven gear, and once the alignment accuracy is poor, certain abrasion is generated on the tooth surfaces.
Preferably, one of the first transmission gear and the second transmission gear is provided with a spline, and the other is provided with a key groove matched with the spline. Spline and keyway complex advantage are can peg graft in the multi-angle direction, do not need to aim at first drive tooth and second drive tooth to a certain angle and peg graft deliberately, and it is more convenient to peg graft.
Preferably, the first transmission gear is provided with a round table, the key groove is formed in the round table, and a brake is arranged on the periphery of the round table. The brake can generate braking force on the round table, so that under the condition that the motor is powered off, resistance is generated when the telescopic assembly is retracted, and damage to the telescopic assembly, the motor and other parts caused by too-fast retraction is prevented.
Preferably, one of the first transmission gear and the second transmission gear is provided with a coupling convex column, and the other is provided with a slot matched with the coupling convex column. The convex column and the slot are connected in an inserting mode, so that the structure is simpler, and the processing cost is lower.
Preferably, the first transmission gear is a speed reduction worm gear, and the second transmission gear and the driven gear are both bevel gears for transmission; or the first transmission gear is a speed reduction worm gear, and the second transmission gear and the driven gear are worm and gear transmission. When the second transmission gear and the driven gear are in helical gear transmission, the transmission efficiency is higher, the transmission gear is more stable, the noise is relatively smaller, and when the worm gear and worm transmission is adopted, the bearable torque is larger, the cost is lower, and the two transmission modes can be selected correspondingly according to the positioning of the product.
Preferably, the actuator comprises a first module and a second module, the first module comprises the motor, a driving worm and a first transmission gear, the second module comprises the telescopic component, a driven gear and a second transmission gear, and the first module and the second module are assembled in a mutually inserted mode. By adopting the structure, the assembly of the whole actuator is converted into the assembly of the first module and the second module, namely, the first module and the second module are all independent modularized integers, and the first module and the second module can be directly spliced to finish the installation when being installed. The structure can enable the first module and the second module to have better flexibility in actual use.
Preferably, the actuator further comprises a housing, the second module is mounted in the housing through a fastener, a first elastic pad is arranged between the first module and the inner wall of the housing, and the first module is floatably accommodated in the housing through the first elastic pad. In this scheme, the second module is accomplished through the fastener with the shell location, and first module then adopts floating installation, this side indicates floating installation, refer to and not need the fastener to fix, accomplish the location of shell to first module by utilizing the elastic space of first elastic pad, this kind of mounting means, even if there is assembly error in other parts inside the actuator, can compensate through the adjustable space of first elastic pad, thereby the precision requirement to spare part has been reduced, the cost is reduced, the first elastic pad can also play buffering, the absorbing effect simultaneously, reduce the vibration transmission of motor to the shell.
Preferably, the actuator further comprises a housing, the first module is mounted in the housing through a fastener, a second elastic pad is arranged between the second module and the inner wall of the housing, and the second module is floatably accommodated in the housing through the second elastic pad. The scheme is similar to the previous scheme, in the scheme, the first module is fixedly connected with the shell, and the second module is connected in a floating mode.
Preferably, the first module comprises a first gear box, the driving worm and the first transmission gear are both arranged in the first gear box, the second module comprises a second gear box, and the second transmission gear and the driven gear are both arranged in the second gear box. The first gear box and the second gear box are respectively and independently arranged on the first module and the second module, so that the integrity of the first module and the second module is stronger.
Preferably, a first bearing and a second bearing are respectively arranged at two ends of the second transmission gear, and a first bearing groove for correspondingly arranging the first bearing and a second bearing groove for correspondingly arranging the second bearing are arranged in the second gear box. The design ensures that both ends of the second transmission gear can be positioned, and the second transmission gear is more stable in the rotation process.
Preferably, the actuator comprises a housing including a lower case and an upper case, wherein a boss is protruded on the upper case, the first gear case is installed between the boss and the lower case, and a wire outlet hole is provided at a side of the boss. Because the size of the first gear box is larger than that of the motor, a bulge is arranged on the shell to avoid, the wire outlet hole can just conduct wire outlet by means of the side face of the bulge, the position is well utilized, and occupied space is reduced.
Preferably, the telescopic assembly comprises a driving screw and a driving nut arranged on the driving screw, and the driven gear is fixedly connected with the driving screw. The telescopic components of the driving screw and the driving nut are quite common, and the purchasing and manufacturing costs are low.
Preferably, the telescopic assembly comprises an outer tube and an inner tube, the inner tube is fixedly connected with the transmission nut, a limit switch is installed in the outer tube, and a positioning block for positioning the limit switch is also installed on the outer tube. The traditional limit switch is fixed by using fasteners such as screws, assembly errors are easy to generate in position, and the positioning block is used for positioning the limit switch, so that the position of the limit switch is more accurate, and the expansion limit position of the expansion assembly can be accurately controlled.
Preferably, a switch cavity for accommodating the limit switch is arranged in the outer tube, a top cover and a bottom cover are arranged at two ends of the outer tube, the bottom of the limit switch is propped against the bottom cover, the top of the limit switch is propped against the positioning block, and the positioning block is fixed between the top end of the outer tube and the top cover. The scheme is to develop details of the structure of the positioning block, and the structure utilizes the positioning block to limit the top of the limit switch.
Preferably, the limit switch comprises a base plate and a limit switch arranged on the base plate, and the positioning block is provided with a switch groove for positioning the limit switch. The limit switch can be positioned by the switch groove, so that a part of acting force is shared, and the connection stability of the limit switch and the substrate is better.
Other features and advantages of the present invention will be disclosed in the following detailed description of the invention and the accompanying drawings.
[ description of the drawings ]
The invention is further described with reference to the accompanying drawings:
FIG. 1 is a schematic overall view of a first embodiment of an actuator of the present invention;
FIG. 2 is a schematic illustration of an actuator embodiment of the present invention with an upper housing removed;
FIG. 3 is a schematic diagram illustrating the assembly of a first module and a second module in accordance with a first embodiment of the present invention;
FIG. 4 is a schematic view illustrating the internal structures of the first and second modules in the actuator according to the first embodiment of the present invention;
FIG. 5 is an exploded view of the components of a first embodiment of the actuator of the present invention;
FIG. 6 is a schematic view showing the assembly of an outer tube, limit switches, and positioning blocks in an actuator embodiment of the present invention.
[ detailed description ] of the invention
The technical solutions of the embodiments of the present invention will be explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present invention.
In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc. are used to indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description of the embodiments and to simplify the description, and do not indicate or imply that the apparatus or elements 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.
Example 1:
as shown in fig. 1 to 6, the present embodiment shows an actuator, which is a linear push rod, and is used in the fields of home and medical equipment, and in terms of the general structure, the actuator comprises a motor 1 and a telescopic assembly 3 which is driven by the motor 1 to realize telescopic motion, the telescopic assembly 3 in the present embodiment comprises a driving screw 31, a driving nut 32, an outer tube 33 and an inner tube 34, the driving screw 31 rotates, the driving nut 32 is driven to axially move on the driving screw 31, and the driving nut 32 is fixedly connected with the inner tube 34, so that the inner tube 34 relatively moves relative to the outer tube 33, and since the telescopic assembly 3 is very common in the field of actuators, and will not be excessively described.
Transmission part between motor 1 and telescopic assembly 3: the motor 1 is connected with a driving worm 21, the telescopic assembly 3 is connected with a driven gear 24, and the driving worm 21 drives the driven gear 24 to rotate. The actuator in this embodiment further includes an intermediate gear set between the driving worm 21 and the driven gear 24, that is, the first gear 22 and the second gear 23, which corresponds to a plurality of primary gear transmissions, and of course, this intermediate gear set is not limited to a primary gear transmission, but may be a secondary gear transmission, for example, a third gear may be added between the first gear 22 and the driving worm 21, and a fourth gear may be added between the second gear 23 and the driven gear 24, which is not expanded here, and the intermediate gear set in this embodiment is a primary gear transmission. The intermediate transmission gear set is added between the driving worm 21 and the driven gear 24, so that the speed reduction and the transmission torque improvement can be further realized.
In addition, as can be seen from fig. 3 to fig. 4, it is a key point of this embodiment that the intermediate gear set is designed separately, the first gear 22 and the second gear 23 are independent from each other, and when the intermediate gear set is installed, the first gear 22 and the second gear 23 are coupled by means of plugging, so after the design, the first gear 22 only needs to be meshed with the driving worm 21, the second gear 23 only needs to be meshed with the driven gear 24, after which the first gear 22 and the second gear 23 are plugged with each other to realize the transmission of the whole actuator.
In the conventional assembly mode, the tooth surfaces of the driving teeth are simultaneously considered to be aligned with the tooth surfaces of the driving worm 21 and the driven gear 24 to realize assembly, once the alignment accuracy is poor, certain abrasion is generated on the tooth surfaces, and by utilizing the structure of the embodiment, the two driving teeth can be firstly ensured to be respectively engaged with the corresponding tooth surfaces, the alignment difficulty in the engagement process is small, the abrasion influence on the tooth surfaces can not be generated, and the subsequent plugging process has no relation with the tooth surfaces and is only the alignment in the axial direction, so that the integral assembly mode is obviously simpler than the original assembly mode in the installation aspect, and the abrasion on the tooth surfaces is smaller.
The concrete structure is as follows:
as shown in fig. 4 and 5, in this embodiment, the first driving gear 22 is a speed-reducing worm gear, the second driving gear 23 is a bevel gear, the driven gear 24 is also a bevel gear, that is, a bevel gear is used between the second driving gear 23 and the driven gear 24, and when the bevel gear is used for driving, the transmission efficiency is higher, the stability is higher, the noise is relatively smaller, in addition, in the bevel gear driving manner, the intersection angle between the rotation axis of the second driving gear 23 and the rotation axis of the driven gear 24 can be adjusted, and the intersection angle is preferably 90 degrees, so that the axial direction of the driving worm 21 is parallel to the axial direction of the driving screw 31 (the threads on the driving screw 31 in fig. 5 are not shown). Of course, in other embodiments, the rotation axes of the second driving gear 23 and the driven gear 24 may not be limited to 90 degrees, may be 80 degrees, 60 degrees, etc., that is, the axial direction of the driving worm 21 and the axial direction of the driving screw 31 may not be limited to being parallel to each other after being disposed in a helical gear transmission.
The plug-in structure of the first transmission tooth 22 and the second transmission tooth 23: the outer periphery of the end of the second driving gear 23 is provided with a spline 231, and the end surface of the first driving gear 22 is provided with a round table 221, and the inside of the round table 221 is provided with a key groove 222 matched with the spline 231. By utilizing the structural characteristics of the spline 231 matched with the key groove 222, the first transmission teeth 22 and the second transmission teeth 23 can be spliced at multiple angles during splicing, and the first transmission teeth 22 and the second transmission teeth 23 are not required to be aligned to a certain angle for splicing, so that splicing is more convenient.
In addition, in this embodiment, a brake for generating braking force on the first driving gear 22 is disposed on the outer peripheral side of the round table 221, the brake includes a torsion spring 51 and a torsion spring cover plate 52, the torsion spring 51 is sleeved outside the round table 221, the torsion spring cover plate 52 is used for limiting pins of the torsion spring 51, when the motor 1 operates to drive the inner tube 34 to extend, friction force of the torsion spring 51 on the round table 221 is small, and there is almost no resistance, when the motor 1 is in a non-operation state, the inner tube 34 is recovered, the torsion spring 51 generates holding force on the round table 221 when receiving the friction force of the round table 221 which is reversed, so that resistance is generated on the round table 221 when recovering the inner tube 34, and since the torsion spring type brake itself is common in the actuator field, too will not be described.
In this embodiment, in order to further improve the overall assembly convenience of the actuator, the whole actuator is divided into three parts, including the housing 4, the first module a and the second module B, and when assembling, the first module a and the second module B are simply inserted and then integrally installed in the housing 4.
The first module A comprises the motor 1, a driving worm 21, a first transmission gear 22 and a first gear box 25, and the second module B comprises the telescopic assembly 3, a driven gear 24, a second transmission gear 23 and a second gear box 26. In short, the motor 1, the driving worm 21, the first driving gear 22 and the first gear box 25 form a modularized whole, the telescopic assembly 3, the driven gear 24, the second driving gear 23 and the second gear box 26 form a modularized whole, when in actual assembly, the first module A can be assembled firstly, the second module B can be assembled secondly, and finally, the first module A and the second module B are integrally inserted into each other, and the insertion structure of the first driving gear 22 and the second driving gear 23 is utilized for insertion. With this structure, the assembly of the whole actuator is converted into the assembly of the first module A and the second module B, and the integrity is stronger.
Meanwhile, the modularized installation mode can also be used for selling the first module A and the second module B as independent accessories; or the second module B can be matched with the first module A with various motor specifications, for example, enterprises can use motors 1 with different powers to form different first modules A, and the second module B can adopt the same type, and only different first modules A are needed to be selected when the first modules A are assembled on an assembly line; or the first module a may be adapted to accommodate a plurality of telescoping assemblies 3 of different telescoping lengths. All that is required is to ensure that the plug-in structure between the first module A and the second module B is kept universal. The structure can enable the first module A and the second module B to have better flexibility in actual use.
It should be noted that, fig. 2 shows a schematic diagram of the assembled first module a and second module B, in this embodiment, the driving worm 21 and the driving screw 31 are parallel after the first module a and second module B are assembled, which is only a preferred embodiment of the present invention, and in other embodiments, the driving worm 21 and the driving screw 31 may not be parallel, but may be disposed at any angle, for example, 90 degrees, and if disposed at 90 degrees, the longitudinal direction of the first module a and the longitudinal direction of the second module B are perpendicular to each other.
When the first gear box 25 and the second gear box 26 are arranged, and the first module a and the second module B are used as separate accessories, the integrity is stronger, the internal transmission structure can be better protected, the driving worm 21, the brake and the first transmission teeth 22 are all arranged in the first gear box 25, the second transmission teeth 23 and the driven gear 24 are all arranged in the second gear box 26, the first bearing 27 and the second bearing 28 are respectively arranged at two ends of the second transmission teeth 23, and the first bearing groove correspondingly provided with the first bearing 27 and the second bearing groove correspondingly provided with the second bearing 28 are arranged in the second gear box 26. This design allows both ends of the second gear tooth 23 to be positioned, allowing the second gear tooth 23 to be more stable during rotation.
To further enhance the convenience of assembly, the second module B in this embodiment is mounted in the housing 4 by fasteners, specifically, as shown in fig. 5, the second gear box 26 includes a lower half box 261 and an upper half box 262, the upper half box 262 and the lower half box 261 are fixed by screws, the housing 4 includes a lower shell 41 and an upper shell 42, the upper shell 42 is provided with mounting holes 4201, the mounting holes 4201 correspond to the positions of screw through holes 2601 for fastening one of the upper half boxes 262, and fasteners such as screws can pass through the mounting holes 4201 to fix the second gear box 26 on the upper shell 42, thereby positioning the second module B in the housing 4;
the first module a is mounted in a floating manner, which refers to a mounting positioning manner without using fasteners such as screws, because the mounting manner fixed by the fasteners such as screws is equivalent to that the position between the first module a and the housing 4 is relatively fixed, but in this embodiment, the position between the first module a and the housing 4 is relatively not fixed and can float. Specifically, a first elastic pad 431 is disposed between the first module a and the inner wall of the housing 4, in this embodiment, the first elastic pad 431 preferably includes a cover pad wrapped outside the first gear box 25, and when the first module a is installed, due to the plugging installation with the second module B, the plugging depth may not be uniform, that is, the first elastic pad 431 may be in interference fit with the inner wall of the housing 4, or even may be in clearance fit, because even in a slight clearance fit, vibration filtering may be achieved through the damping effect of the first elastic pad 431. After such design, the assembly error in the actuator can be compensated by utilizing the elastic action of the first elastic pad 431, so the assembly scheme of the structure of the embodiment has lower assembly precision requirement on parts in the actuator and better cost control, and simultaneously, the vibration reduction and noise reduction effects can be realized by utilizing the first elastic pad 431, and the vibration of the motor 1 is reduced and transmitted to the shell 4, thereby achieving two purposes.
The first elastic pad 431 is not limited to the case cover pad alone, and may include a motor pad provided outside the motor 1, or the like, as long as floating mounting is completed. The first elastic pad 431 is not limited to be fixed to the first module a, and may be fixed to the inner wall of the housing 4, or may be fixed to both the first module a and the inner wall of the housing 4, so long as it is between the first module a and the inner wall of the housing 4, and it is within the scope of the present invention.
In addition, for further shock absorption and noise reduction, a second elastic pad 432 may be added between the second module B and the inner wall of the housing 4, and the second elastic pad 432 is preferably disposed at a corner position of the second module B. So that the transmission of vibrations of the motor 1, the telescopic assembly 3 to the housing 4 can be reduced as a whole.
The top of the outer shell 4 of this embodiment is installed with the tail and draws 44, and the installation of tail draws 44 is also comparatively convenient, is equipped with the tail respectively and draws the notch on inferior valve 41, the epitheca 42, is equipped with annular notch on the tail and draws 44, and after inferior valve 41 and epitheca 42 concatenation, tail draws 44 notch just to imbed in the annular notch to realize tail and draw 44 location, for the reinforcement, tail draws 44 and still fasten to outer shell 4 top with the screw.
In addition, since the size of the first gear case 25 is larger than that of the motor 1, the upper shell 42 is protruded with the protrusion 421 to have enough space to solute the first gear case 25, the first gear case 25 is installed between the protrusion 421 and the lower shell 41, the side 4211 of the protrusion 421 is provided with the wire outlet 4222, and the wire pressing block 45 is added on the inner wall of the upper shell 42, so that the cable is not easily pulled, the wire outlet 4222 can just perform wire outlet by means of the side of the protrusion 421 in this embodiment, so that the position is well utilized, the occupied space is reduced, and the probability of being collided can be reduced relative to other sides of the housing 4.
In the outer tube 33 of the present embodiment, a limit switch is also installed, which is a relatively common accessory in the actuator field, and is mainly used for limiting two limit positions of the transmission nut 32, and the limit switch generally includes a strip-shaped base plate 61 and two limit switches 62 installed on the base plate 61, and positions of the two limit switches 62 on the base plate 61 can be adjusted. In the conventional actuator, the base plate 61 is fixed to the inner wall of the outer tube 33 by means of a fastener such as a screw, and since the screw is fastened in a manner having a certain positioning error, particularly when the drive nut 32 is pressed against the limit switch 62, an axial thrust is generated on the base plate 61, which tends to cause the base plate 61 to move axially, which results in inaccuracy in the two limit positions of the inner tube 34.
As shown in fig. 6, in order to solve such a problem, a positioning block 331 for positioning the limit switch is mounted on the outer tube 33, a switch cavity 332 for accommodating the limit switch is provided in the outer tube 33, a top cover 333 and a bottom cover 334 are provided at two ends of the outer tube 33, the bottom of the base plate 61 abuts against the bottom cover 334, the top of the base plate 61 abuts against the positioning block 331, the positioning block 331 is fixed between the top of the outer tube 33 and the top cover 333, in addition, the positioning block 331 in this embodiment is further provided with a switch slot 3311 for accommodating the limit switch, the limit switch above the base plate 61 can be mounted in the switch slot 3311 for positioning, and when the drive nut 32 presses the limit switch, a part of thrust is shared by the positioning block 331, so that the acting force between the limit switch 62 and the base plate 61 is reduced, and the connection stability of the limit switch 62 and the base plate 61 is better.
Example 2
The difference from embodiment 1 is that in this embodiment, the second driving gear and the driven gear are both worm and gear driven, that is, the second driving gear is a reduction worm, and the driven gear is a driven worm gear, so that compared with helical gear driving, the worm and gear driving mode has the advantages of larger driving torque, relatively higher reduction ratio and more cost advantage. The positioning of the product is related, and if the product is suitable for a low-end market or the torque transmission is required to be large, a worm and gear transmission mode can be adopted.
Example 3
The difference between the embodiment and the embodiment 1 is that the spliced structure is different, in this embodiment, the second transmission tooth is provided with the coupling convex column, the first transmission tooth is provided with the slot matched with the coupling convex column, the section of the coupling convex column is a non-circular section, for example, the section of the coupling convex column can be a rectangular convex column, a D-shaped convex column, and the like, so long as the first transmission tooth and the second transmission tooth keep synchronous rotation after the coupling convex column is inserted into the slot, and the first transmission tooth and the second transmission tooth keep synchronous rotation and fall into the protection scope of the invention.
Example 4
The difference between this embodiment and embodiment 1 lies in that the structure of pegging graft is different, has the circular projection on the second transmission tooth in this embodiment, is equipped with the round platform on the first transmission tooth, is equipped with on the round platform with circular projection complex round hole, the intercommunication has the side opening between the side of round platform and the round hole, be provided with the bolt hole on the circular projection, after the circular projection inserts the round hole, the bolt passes the side opening and inserts in the bolt hole, also can realize first transmission tooth and second transmission tooth synchronous drive.
Example 5
The difference between this embodiment and embodiment 1 is that in embodiment 1, the second module is fixedly connected with the housing, the first module is floatingly accommodated in the housing, and in this embodiment, the first module is fixedly connected with the housing, the second module is floatingly accommodated in the housing, that is, a second elastic pad is disposed between the second module and the inner wall of the housing, and the second module is floatably accommodated in the housing through the second elastic pad.
While the invention has been described in terms of embodiments, it will be appreciated by those skilled in the art that the invention is not limited thereto but rather includes the drawings and the description of the embodiments above. Any modifications which do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the appended claims.

Claims (11)

1. The utility model provides a convenient actuator of easy dismounting, includes the motor and realizes flexible subassembly under motor drive, the motor is connected with drive worm, flexible subassembly is connected with driven gear, drive worm drives driven gear rotates, its characterized in that, the actuator is still including establishing first drive tooth and the second drive tooth between drive worm and the driven gear, first drive tooth is connected with drive worm transmission, and the second drive tooth is connected with driven gear transmission, realize shaft coupling transmission mutually grafting between first drive tooth and the second drive tooth, the actuator includes first module and second module, first module includes motor, drive worm, first drive tooth, the second module includes flexible subassembly, driven gear, second drive tooth, first module and the mutual grafting assembly of second module, flexible subassembly includes drive screw and the drive nut of setting up on drive screw, driven gear with drive screw fixed connection, flexible subassembly includes inner tube and drive nut fixed connection, the outer tube is installed to the inner tube and is connected with driven gear transmission nut transmission, the outer tube is installed to the outer tube and is used for the limit top cap, the limit switch is equipped with the top cap is equipped with to the outer tube, the limit switch top cap is equipped with the top cap, the limit top cap is equipped with the top cap is fixed to the top cap.
2. The actuator of claim 1, wherein one of the first and second drive teeth is provided with a spline and the other is provided with a keyway that mates with the spline.
3. The actuator of claim 2, wherein the first gear is provided with a circular table, the key slot is formed in the circular table, and a brake is mounted on the periphery of the circular table.
4. The actuator of claim 1, wherein one of the first and second drive teeth has a coupling post and the other has a socket for mating with the coupling post.
5. The actuator of claim 1, wherein the first drive gear is a reduction worm gear, and the second drive gear and the driven gear are both helical gears; or the first transmission gear is a speed reduction worm gear, and the second transmission gear and the driven gear are worm and gear transmission.
6. The actuator of claim 1, wherein the actuator further comprises a housing, the second module is mounted in the housing by a fastener, a first resilient pad is disposed between the first module and an inner wall of the housing, and the first module is floatably received in the housing by the first resilient pad.
7. The actuator of claim 1, further comprising a housing, wherein the first module is mounted in the housing by a fastener, and a second resilient pad is disposed between the second module and an inner wall of the housing, wherein the second module is floatably received in the housing by the second resilient pad.
8. The easy-to-disassemble actuator of claim 1, wherein the first module comprises a first gear box, the driving worm and the first transmission gear are all arranged in the first gear box, the second module comprises a second gear box, and the second transmission gear and the driven gear are all arranged in the second gear box.
9. The actuator of claim 8, wherein the first bearing and the second bearing are respectively mounted at two ends of the second transmission gear, and a first bearing groove corresponding to the first bearing and a second bearing groove corresponding to the second bearing are arranged in the second gear box.
10. The easy-to-mount and demount actuator of claim 8, wherein the actuator comprises a housing including a lower shell and an upper shell, the upper shell having a bulge protruding thereon, the first gear box being mounted between the bulge and the lower shell, a side of the bulge being provided with a wire outlet.
11. The actuator of claim 1, wherein the limit switch comprises a base plate and a limit switch provided on the base plate, and the positioning block is provided with a switch groove for positioning the limit switch.
CN201710222846.3A 2017-04-07 2017-04-07 Actuator convenient to disassemble and assemble Active CN106969109B (en)

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CN108518466B (en) * 2018-04-19 2023-09-26 宁波海仕凯驱动科技有限公司 Linear actuator with compact structure
CN108394393A (en) * 2018-05-03 2018-08-14 吉林大学 A kind of electric booster braking system of large transmission ratio
CN109510429B (en) * 2018-10-27 2024-04-09 浙江捷昌线性驱动科技股份有限公司 Linear actuator

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