CN116221355A - Linear driver - Google Patents

Linear driver Download PDF

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Publication number
CN116221355A
CN116221355A CN202211741986.9A CN202211741986A CN116221355A CN 116221355 A CN116221355 A CN 116221355A CN 202211741986 A CN202211741986 A CN 202211741986A CN 116221355 A CN116221355 A CN 116221355A
Authority
CN
China
Prior art keywords
base
shell
linear drive
ball screw
gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211741986.9A
Other languages
Chinese (zh)
Inventor
胡绪山
朱浩翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Zhete Electrical And Mechanical Technology Co ltd
Original Assignee
Kunshan Zhete Electrical And Mechanical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan Zhete Electrical And Mechanical Technology Co ltd filed Critical Kunshan Zhete Electrical And Mechanical Technology Co ltd
Priority to CN202211741986.9A priority Critical patent/CN116221355A/en
Publication of CN116221355A publication Critical patent/CN116221355A/en
Pending legal-status Critical Current

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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
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2209—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with arrangements for taking up backlash
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • 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
    • F16H2025/2046—Screw mechanisms with gears arranged perpendicular to screw shaft axis, e.g. helical gears engaging tangentially the screw shaft
    • 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
    • F16H2025/2081—Parallel arrangement of drive motor to screw axis
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention discloses a linear driver, which comprises a base, a shell fixedly connected with the base, a ball screw arranged in the shell and extending to the base, a sliding block in threaded connection with the ball screw, a travel rod connected with the sliding block and a driving mechanism for driving the ball screw to rotate, wherein the travel rod is driven by the driving mechanism to axially move along the shell, and the driving mechanism comprises two motors which are in transmission connection with each other; the ball screw extends to a rod section in the base, a first fixing piece and a second fixing piece which are arranged at intervals along the axial direction are fixed on the rod section, a limiting piece is arranged in the base, the first end of the limiting piece is in butt joint with the inner end of the shell, a first plane bearing is arranged between the second end of the limiting piece and the first fixing piece, and a second plane bearing is arranged between the second fixing piece and the base. The linear driver provided by the invention can eliminate transmission gaps in the linear direction of the linear driver, is stable in operation, improves the precision and prolongs the service life.

Description

Linear driver
Technical Field
The invention relates to the technical field of drivers, in particular to a linear driver.
Background
The high-thrust linear driver is a driver commonly used in the industry and medical industry and generally comprises a shell, a screw rod arranged in the shell, a sliding block in threaded connection with the screw rod, a travel rod connected with the sliding block and a power source for driving the screw rod to rotate, wherein the power source adopts a motor, and drives the screw rod to rotate through the motor, so that the travel rod is driven to axially move along the shell, and linear driving is realized. The clearance exists between the linear driver screw and the sliding block which commonly use the trapezoidal screw in the linear direction, and the linear driver has the vibration during movement, so that the precision of the linear driver is low, the working efficiency is low and the service life is short.
Disclosure of Invention
The invention aims to provide a linear driver which can improve the load capacity, eliminate the axial clearance and stably operate.
Based on the problems, the technical scheme provided by the invention is as follows:
a linear driver, which comprises a base, a shell fixedly connected with the base, a ball screw arranged in the shell and extending to the base, a sliding block in threaded connection with the ball screw, a travel rod connected with the sliding block and a driving mechanism for driving the ball screw to rotate, wherein the travel rod is driven by the driving mechanism to axially move along the shell,
the driving mechanism comprises two motors, and the ball screw is in transmission connection with the two motors;
the ball screw extends to a rod section in the base, a first fixing piece and a second fixing piece which are arranged at intervals along the axial direction are fixed on the rod section, a limiting piece is arranged in the base, the first end of the limiting piece is in butt joint with the inner end of the shell, a first plane bearing is arranged between the second end of the limiting piece and the first fixing piece, and a second plane bearing is arranged between the second fixing piece and the base.
In some embodiments, a rotating guide sleeve is arranged at one end of the screw rod, which is close to the base.
In some embodiments, the driving mechanism further comprises a gear box fixed on the outer side of the base, a worm wheel rotatably arranged in the gear box, a first gear fixed on one axial end of the worm wheel, and a worm arranged at the power output end of the motor, wherein the two worms are respectively meshed with the worm wheel, and a second gear meshed with the first gear is fixed on the ball screw.
In some embodiments, the two worms are disposed on both radial sides of the worm wheel, respectively.
In some embodiments, a support gear assembly is further disposed in the gear box, and the support gear assembly includes two support gears rotatably disposed on two radial sides of the worm wheel, and the support gears are engaged with the worm.
In some embodiments, bearings are respectively arranged on two axial sides of the worm wheel, and a mounting table matched with the bearings is arranged in the gear box.
In some embodiments, a first connecting piece is fixed on the base, and a second connecting piece is fixed at the outer end of the travel bar; the first connecting piece part extends into the base, the rotating guide sleeve is arranged in the first connecting piece, and the second plane bearing is located between the second fixing piece and the first connecting piece.
In some embodiments, the outer end of the housing is provided with a travel guide sleeve matched with the travel bar.
In some embodiments, the slider includes a first sliding portion slidably engaged with the housing and a second sliding portion coupled to the travel bar.
In some embodiments, the sliding block is provided with a plurality of limiting parts at the periphery, and the inner wall of the shell is provided with a sliding groove matched with the limiting parts.
Compared with the prior art, the invention has the advantages that:
1. compared with the linear driver adopting two linear drivers, the linear driver adopts a structure of matching two motors with a first-stage ball screw transmission, so that the energy loss is less, the load capacity is higher, the running speed is faster, and the efficiency is higher;
2. two fixing pieces are arranged on the ball screw, and meanwhile, a limiting piece is arranged in the base and matched with the plane bearing, so that the clearance of the linear driver in the linear direction can be eliminated, the operation is stable, and the precision of the linear driver is improved;
3. the power output ends of the two motors are driven worms, and the two worms are meshed with the worm wheel at the same time, so that the self-locking capacity of the linear driver is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, in which the drawings are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a linear actuator according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 4 is a schematic view of a portion of a structure of an embodiment of the present invention;
wherein:
1. the device comprises a base 2, a shell 2-1, a stroke guide sleeve 3, a ball screw 4, a sliding block 4-1, a first sliding part 4-2, a second sliding part 5, a stroke rod 6, a limiting piece 7, a first fixing piece 8, a second fixing piece 9, a first plane bearing 10 and a second plane bearing; 11. the first connecting piece 12, the worm wheel 13, the first gear 14, the second gear 15, the motor 16 and the worm; 17. a support gear; 18. bearing 19, gear box 20, second connecting piece 21, rotation guide pin bushing.
Detailed Description
The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The implementation conditions used in the examples may be further adjusted according to the conditions of the specific manufacturer, and the implementation conditions not specified are generally those in routine experiments.
Referring to fig. 1 to 4, for a schematic structural diagram of an embodiment of the present invention, a linear driver is provided, which includes a base 1, a housing 2 fixedly connected with the base 1, a ball screw 3 installed in the housing 2 and extending to the base 1, a slider 4 screwed with the ball screw 3, a travel rod 5 connected with the slider 4, and a driving mechanism for driving the ball screw 3 to rotate, wherein the travel rod 5 is driven by the driving mechanism to axially move along the housing 2, so as to realize linear driving.
Specifically, the driving mechanism comprises a gear box 19 fixed on the outer side of the base 1, two motors 15 installed on the gear box 19, a worm wheel 16 arranged in the gear box 19 in a rotating mode, a first gear 13 fixed at one axial end of the worm wheel 16 and a worm 16 arranged at the power output end of the motor 15, wherein the two worms 16 are respectively meshed with the worm wheel 16, meanwhile, a second gear 14 meshed with the first gear 13 is fixed on the ball screw 3, and the two motors 15 drive the two worms 16 to rotate so as to drive the worm wheel 12 to rotate, so that the first gear 13 is driven to rotate, the second gear 14 is driven to rotate, and the rotation of the ball screw 3 and the linear movement of the stroke rod 5 are achieved. Preferably, two worms 16 are arranged on both radial sides of the worm wheel 12. The load force and self-locking capacity of the linear driver can be improved by adopting two motors 15 to drive and simultaneously adopting two worms 16 to mutually engage and drive the worm wheel 12.
In order to improve the stability of the driving mechanism, a supporting gear assembly is further arranged in the gear box 19 to ensure stable transmission of the worm gear and the worm, and the driving mechanism comprises two supporting gears 17 rotatably arranged on two radial sides of the worm gear 12, wherein the supporting gears 17 are meshed with the worm 16.
In order to facilitate the installation of the worm wheel 12, bearings 18 are provided on both axial sides of the worm wheel 12, and an installation table matching with the bearings 18 is provided in a gear case 19, and the worm wheel 12 is rotatably supported in the gear case 19 via the two bearings 18. A support shaft is provided in the gear case 19, and the support gear 17 is rotatably supported on the support shaft via a bearing 18.
In order to facilitate the installation of the ball screw 3 and eliminate the clearance of the linear driver in the linear direction, a first fixing piece 7 and a second fixing piece 8 which are arranged at intervals along the axial direction are arranged on the rod section of the ball screw 3 extending into the base 1, a limiting piece 6 with the first axial end abutting against the inner end of the shell 2 is arranged in the base 1, a first plane bearing 9 is arranged between the second axial end of the limiting piece 6 and the first fixing piece 7, a second plane bearing 10 is arranged between the second fixing piece 8 and the base 1, the limiting piece 6 is in threaded connection on the inner wall of the base 1, the transmission clearance of the linear driver in the linear direction can be eliminated through the limit of the limiting piece 6, the operation is stable, the precision is improved, and the service life is prolonged.
In order to facilitate the connection of the driven member, a first connecting member 11 is fixed to the base 1, and a second connecting member 20 is fixed to the outer end of the travel bar 5. Wherein, the first connecting piece 11 extends into the base 1 partially, the second plane bearing 10 is disposed between the second fixing piece 8 and the first connecting piece 11, and a rotating guide sleeve 21 matched with the end of the ball screw 3 is disposed in the first connecting piece 11, in this example, the rotating guide sleeve 21 is a graphite copper sleeve.
In order to facilitate the linear movement of the travel bar 5, a travel guide sleeve 2-1 matched with the travel bar 5 is arranged at the outer end of the housing 2.
In this example, the slider 4 includes a first sliding portion 4-1 slidably engaged with the housing 2 and a second sliding portion 4-2 connected to the stroke lever 5. Wherein the stroke rod 5 is in threaded connection with the second sliding part 4-2.
The periphery at slider 4 is equipped with a plurality of spacing portions, is equipped with the spout that matches with spacing portion at shell 2 inner wall simultaneously, realizes the sliding connection of slider 4 and shell 2 through the cooperation of spacing portion and spout, avoids slider 4 to rotate in shell 2.
The working process of the invention is as follows:
the two motors 15 drive the two worms 16 to rotate, the two worms 16 drive the worm wheel 12 to rotate, the worm wheel 12 drives the first gear 13 to rotate, the first gear 13 drives the second gear 14 to rotate so as to drive the ball screw 3 to rotate, and accordingly the sliding block 4 is driven to axially move along the ball screw 3, and the travel rod 5 is driven to axially move along the housing 2, so that linear driving is realized.
The linear driver adopts double motor driving, and two worms are respectively meshed with the worm wheel for transmission, so that the load capacity and the self-locking capacity of the linear driver are improved, and the running speed and the running efficiency are further improved; after the ball screw is installed, the clearance of the linear driver in the linear direction can be eliminated, the operation is stable, the precision is improved, and the service life is prolonged.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a linear drive, includes the base, with base fixed connection's shell, install in the shell and extend to the ball of base, with ball threaded connection's slider, with the stroke pole and the drive that the slider is connected ball pivoted actuating mechanism, the stroke pole is in under the actuating mechanism drives along shell axial displacement, its characterized in that:
the driving mechanism comprises two motors, and the ball screw is in transmission connection with the two motors;
the ball screw extends to a rod section in the base, a first fixing piece and a second fixing piece which are arranged at intervals along the axial direction are fixed on the rod section, a limiting piece is arranged in the base, the first end of the limiting piece is in butt joint with the inner end of the shell, a first plane bearing is arranged between the second end of the limiting piece and the first fixing piece, and a second plane bearing is arranged between the second fixing piece and the base.
2. The linear drive of claim 1, wherein: and a rotating guide sleeve is arranged at one end of the ball screw, which is close to the base.
3. The linear drive of claim 1, wherein: the driving mechanism further comprises a gear box fixed on the outer side of the base, a worm wheel arranged in the gear box in a rotating mode, a first gear fixed at one axial end of the worm wheel, and a worm arranged at the power output end of the motor, wherein the two worms are respectively meshed with the worm wheel, and a second gear meshed with the first gear is fixed on the ball screw.
4. A linear drive according to claim 3, characterized in that: the two worms are respectively arranged at two radial sides of the worm wheel.
5. A linear drive according to claim 3, characterized in that: the gear box is internally provided with a supporting gear assembly, the supporting gear assembly comprises two supporting gears which are rotatably arranged on two radial sides of the worm wheel, and the supporting gears are meshed with the worm.
6. A linear drive according to claim 3, characterized in that: bearings are respectively arranged on two axial sides of the worm wheel, and a mounting table matched with the bearings is arranged in the gear box.
7. The linear drive of claim 1, wherein: the base is fixedly provided with a first connecting piece, and the outer end of the travel rod is fixedly provided with a second connecting piece; the first connecting piece part extends into the base, the rotating guide sleeve is arranged in the first connecting piece, and the second plane bearing is located between the second fixing piece and the first connecting piece.
8. The linear drive of claim 1, wherein: the outer end of the shell is provided with a travel guide sleeve matched with the travel rod.
9. The linear drive of claim 1, wherein: the sliding block comprises a first sliding part in sliding fit with the shell and a second sliding part connected with the travel rod.
10. The linear drive of claim 9, wherein: the sliding block is characterized in that a plurality of limiting parts are arranged on the periphery of the sliding block, and sliding grooves matched with the limiting parts are formed in the inner wall of the shell.
CN202211741986.9A 2022-12-29 2022-12-29 Linear driver Pending CN116221355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211741986.9A CN116221355A (en) 2022-12-29 2022-12-29 Linear driver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211741986.9A CN116221355A (en) 2022-12-29 2022-12-29 Linear driver

Publications (1)

Publication Number Publication Date
CN116221355A true CN116221355A (en) 2023-06-06

Family

ID=86588416

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211741986.9A Pending CN116221355A (en) 2022-12-29 2022-12-29 Linear driver

Country Status (1)

Country Link
CN (1) CN116221355A (en)

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