CN116551441A - Self-locking screw rod device and machine tool - Google Patents

Self-locking screw rod device and machine tool Download PDF

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Publication number
CN116551441A
CN116551441A CN202310601680.1A CN202310601680A CN116551441A CN 116551441 A CN116551441 A CN 116551441A CN 202310601680 A CN202310601680 A CN 202310601680A CN 116551441 A CN116551441 A CN 116551441A
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CN
China
Prior art keywords
screw rod
motor
friction disc
friction
self
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
CN202310601680.1A
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Chinese (zh)
Inventor
潘卫国
陈正源
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Nantong Guosheng Intelligence Technology Group Co ltd
Original Assignee
Nantong Guosheng Intelligence Technology Group 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 Nantong Guosheng Intelligence Technology Group Co ltd filed Critical Nantong Guosheng Intelligence Technology Group Co ltd
Priority to CN202310601680.1A priority Critical patent/CN116551441A/en
Publication of CN116551441A publication Critical patent/CN116551441A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
    • B23Q5/402—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw in which screw or nut can both be driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
    • B23Q5/58—Safety devices
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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

Abstract

The application provides a self-locking screw rod device, which comprises a support; the motor is arranged on the support; the screw rod is rotatably arranged on the support and is connected with the motor; the arresting gear sets up in the support, and is located the one end that the motor was kept away from to the lead screw, and arresting gear includes: the first friction disc is arranged at one end of the screw rod far away from the motor; the second friction disc is movably arranged on the support and is opposite to the first friction disc; the elastic piece is arranged on one side of the second friction disk, which is away from the first friction disk, and can push the second friction disk to be abutted against the first friction disk; the electromagnetic piece is arranged on one side of the second friction disk, which is away from the first friction disk, and when the electromagnetic piece is electrified, attractive force can be generated on the second friction disk, and the attractive force can drive the second friction disk to overcome the thrust of the elastic piece and separate from the first friction disk. The self-locking screw rod device can be used for rapidly locking the screw rod to prevent the screw rod from rotating under the action of gravity when the motor is powered off, so that the carriage is caused to fall down, and the occurrence probability of safety accidents is reduced.

Description

Self-locking screw rod device and machine tool
Technical Field
The application belongs to the field of fixed components, and particularly relates to a self-locking screw rod device and a machine tool.
Background
At present, the movement of the parts of the numerical control machine tool is mostly driven by a ball screw, and the ball screw driving can change the rotary motion of a motor into the linear motion of the parts. Because the ball screw can not be self-locked, the component moving in the vertical direction can drive the ball screw to rotate and fall under the action of gravity, so that safety accidents are caused.
Disclosure of Invention
In view of this, the application provides a self-locking screw rod device and lathe to solve the problem that the lead screw can not auto-lock among the prior art.
Solves the technical problems, and one technical scheme adopted by the application is as follows: provided is a self-locking screw device including: a support; the motor is arranged on the support; the screw rod is rotationally arranged on the support and is connected with the motor; the arresting gear, set up in the support, and be located the lead screw is kept away from the one end of motor, arresting gear includes: the first friction disc is arranged at one end of the screw rod far away from the motor; the second friction disc is movably arranged on the support and is opposite to the first friction disc; the elastic piece is arranged on one side, away from the first friction disc, of the second friction disc, and can push the second friction disc to be abutted against the first friction disc; the electromagnetic piece is arranged on one side, away from the first friction disc, of the second friction disc, the electromagnetic piece is electrified to generate attractive force for the second friction disc, and the attractive force can drive the second friction disc to overcome the thrust of the elastic piece and separate from the first friction disc.
According to an embodiment of the present application, the braking device further includes: the first encoder is arranged on the motor; the second encoder is arranged at one end of the screw rod, which is close to the motor, and the second encoder is arranged corresponding to the first encoder; and the control part is electrically connected with the first encoder and the second encoder and is electrically connected with the motor.
According to an embodiment of the present application, the braking device further includes a first guiding shaft, and the second friction disc is sleeved outside the first guiding shaft and moves reciprocally along the extending direction of the first guiding shaft.
According to an embodiment of the present application, the electromagnetic member is annular and is sleeved outside the first guiding shaft.
According to an embodiment of the application, the second friction disc comprises a friction part and a moving part, the friction part and the moving part are annular, the friction part is opposite to the first friction disc, and is located between the electromagnetic piece and the first friction disc, and the moving part is connected to one side of the friction part away from the first friction disc and is located between the first guide shaft and the electromagnetic piece.
According to an embodiment of the application, the support comprises a stand column, a first bearing seat arranged on the stand column, and a second bearing seat arranged on the stand column, wherein the first bearing seat and the second bearing seat are arranged on the same side of the stand column at intervals; the screw rod is rotatably arranged on the first bearing seat and the second bearing seat.
According to an embodiment of the present application, one end of the screw rod, which is close to the motor, is rotationally connected with the first bearing seat through a first bearing, and one end of the screw rod, which is far away from the motor, is rotationally connected with the second bearing seat through a second bearing.
According to an embodiment of the present application, the screw includes: the guide rail is arranged on the support, and the extending direction of the guide rail is parallel to the extending direction of the screw rod; the nut seat is in threaded connection with the screw rod and sleeved on the guide rail; the first guide rail sliding block is sleeved on the guide rail in a sliding way; the second guide rail sliding block is sleeved on the guide rail in a sliding manner, and the first guide rail sliding block and the second guide rail sliding block are respectively positioned at two sides of the nut seat; and the carriage is fixedly connected to the nut seat, the first guide rail sliding block and the second guide rail sliding block.
According to an embodiment of the application, the self-locking screw rod device further comprises a first shaft connector and a second shaft connector, the screw rod is connected with the motor through the first shaft connector, the second shaft connector and the motor, and the first shaft connector and the second shaft connector are oppositely arranged.
In order to solve the technical problem, the application also provides a machine tool, which comprises the self-locking screw rod device.
The beneficial effects of this application are: the self-locking screw rod device comprises a support, a motor, a screw rod and a braking device, wherein the braking device comprises a first friction disc, a second friction disc, an elastic piece and an electromagnetic piece, when the electromagnetic piece is electrified, attractive force can be generated on the second friction disc, and the attractive force can drive the second friction disc to overcome the thrust of the elastic piece and separate from the first friction disc, so that the screw rod is unlocked; when the electromagnetic part is powered off, the elastic part can push the second friction disc to be abutted against the first friction disc, so that the screw rod is quickly stopped and locked, and the safety is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a front view of one embodiment of a self-locking screw assembly of the present application;
fig. 2 is a partial schematic view of an embodiment of the self-locking screw assembly of fig. 1.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the current scheme, as the screw rod can not be self-locked, a part (such as a carriage) borne by the screw rod can fall downwards under the action of gravity, in order to avoid falling, the main technology adopted at present is that a motor is powered off and self-locked, the weight of the carriage is balanced through a weight balance block, a high-pressure gas cylinder and the like, and the problem of falling of the carriage can be avoided under normal conditions. However, as a result of long-term studies by the present inventors, it was found that since there is a possibility of failure in the mechanical coupling between the screw and the motor, an accident of falling of the carriage may occur in the following cases: the first is that motor power and braking force cannot be transmitted to the screw. In order to ensure neutrality, the motor and the screw rod coupler are connected by friction force, if the loose friction force of the cone ring is reduced, the connection fails, the shaft connection part slips, the power of the motor and the outage self-locking force cannot be completely transmitted to the screw rod, the screw rod loses the rotation power or braking force and is in a free rotation state, the screw rod cannot be self-locked, the screw rod rotates due to the gravity of the carriage, the carriage falls downwards, workpieces, a workbench or the like below are smashed, and serious accidents and property loss are caused. The second is self-locking failure of the motor after power failure. The driving motor is provided with a brake device, and the brake device is tightly held by a motor spindle after power failure to lock the motor. When the braking force of the braking device is reduced or the steel wire rope of the weight balance block is broken, the motor fails in self-locking due to insufficient air pressure of the high-pressure air cylinder and the like, the screw rod is in a free rotation state, the screw rod rotates under the action of the gravity of the carriage, and meanwhile the carriage falls downwards. The scheme can solve the problems.
Referring to fig. 1, an embodiment of the present application provides a self-locking screw device 10, where the self-locking screw device 10 includes a support 11, a motor 12, a screw 13, and a braking device 14. The motor 12 is arranged on the support 11; the screw rod 13 is rotatably arranged on the support 11 and is connected with the motor 12; the braking device 14 is arranged on the support 11 and is positioned at one end of the screw 13 away from the motor 12. Referring to fig. 2 in combination, the brake 14 includes a first friction disk 141, a second friction disk 142, an elastic member 143, and an electromagnetic member 144. The first friction disc 141 is arranged at one end of the screw rod 13 far away from the motor 12; the second friction disc 142 is movably arranged on the support 11 and is opposite to the first friction disc 141; the elastic piece 143 is disposed at one side of the second friction disc 142 away from the first friction disc 141, and the elastic piece 143 can push the second friction disc 142 to abut against the first friction disc 141; the electromagnetic member 144 is disposed on a side of the second friction disc 142 away from the first friction disc 141, and when the electromagnetic member 144 is energized, an attractive force can be generated on the second friction disc 142, and the attractive force can drive the second friction disc 142 to overcome the thrust of the elastic member 143 and separate from the first friction disc 141.
Specifically, a motor 12 is disposed at one end of the support 11, one end of a screw rod 13 is connected with an output end of the motor 12, the other end of the screw rod 13 is connected with a braking device 14, and specifically the screw rod 13 is fixedly connected with a first friction disc 141 included in the braking device 14. The second friction plate 142 is disposed opposite to the first friction plate 141.
On the one hand, the elastic element 143 is disposed on one side of the second friction disc 142 away from the first friction disc 141, when the screw rod device 10 is powered off integrally or the screw rod 13 is required to be stopped actively, the motor 12 is powered off, meanwhile, the electromagnetic element 144 is powered off, the elastic element 143 recovers to deform itself, so as to generate a force in the first direction x, the elastic element 143 pushes the second friction disc 142 to abut against the first friction disc 141, when the first friction disc 141 abuts against the second friction disc 142, the rotation is immediately stopped due to mutual friction, and meanwhile, the screw rod 13 fixedly connected with the first friction disc 141 is immediately stopped rotating after being subjected to a circumferential braking force, so that the screw rod 13 is locked rapidly. The friction force which can be generated between the first friction disk 141 and the second friction disk 142 is very large, and even the screw rod 13 moving at high speed, the locking braking to the screw rod 13 can be stable and reliable.
On the other hand, the electromagnetic member 144 is disposed on the side of the second friction disc 142 facing away from the first friction disc 141, when the motor 12 is energized, the electromagnetic member 144 generates an attractive force in the second direction y on the second friction disc 142, and the attractive force drives the second friction disc 142 to overcome the thrust of the elastic member 143 (at this time, the elastic member is in a compressed state) and separate from the first friction disc 141, at this time, the first friction disc 141 and the second friction disc 142 are separated, the locking of the screw rod 13 is released, and the screw rod 13 is unlocked so as to rotate.
In this embodiment, in order to perform a braking function when the screw device 10 is powered off as a whole, the electromagnetic member 144 is configured to generate an attractive force to the second friction disc 142 after being powered on, and to release the locking of the second friction disc 142 after being powered off, and the braking device 14 achieves a braking effect on the screw 13 after being powered off. In other embodiments, the electromagnetic member 144 may be adjusted to generate attractive force to the second friction disc 142 when the electromagnetic member 144 is powered off according to actual situations, and the second friction disc 142 is unlocked after the electromagnetic member is powered on, so that the braking device 14 can achieve a braking effect on the screw rod 13 after the electromagnetic member is powered on, which is not limited herein.
It should be noted that, in different embodiments, the braking device 14 of the present application may be designed in various forms, such as a disc brake, a band brake, a face gear, etc.
In the present embodiment, the braking device 14 further includes a first encoder (not shown), a second encoder 15, and a control member (not shown). The first encoder is arranged on the motor 12; the second encoder 15 is arranged at one end of the screw rod 13 close to the motor 12, and the second encoder 15 is arranged corresponding to the first encoder; the control is electrically connected to the first and second encoders 15 and to the motor 12.
Specifically, the first encoder is disposed on the motor 12 and is used for reading the rotation speed or rotation angle of the motor 12; the second encoder 15 is arranged at one end of the screw rod 13 close to the motor 12 and is used for reading the rotating speed or the rotating angle of the screw rod 13; the control member is electrically connected to the first and second encoders 15 and to the motor 12. In some embodiments, the control may be a numerical control system. When the readings of the first encoder and the second encoder 15 are different, the relative rotation of the screw rod 13 and the motor 12 can be illustrated, the connection between the screw rod 13 and the motor 12 fails, the control member immediately sends a power-off alarm to the motor 12 to stop working, and the brake device 14 immediately acts to lock the screw rod 13 after the motor 12 is powered off. Wherein, after the motor 12 is powered off, the braking device 14 immediately acts in the following manner: after the power is off, the attraction force of the electromagnetic member 144 to the second friction disc 142 in the second direction y disappears, at this time, the elastic member 143 recovers to deform to generate thrust in the first direction x, the elastic member 143 pushes the second friction disc 142 to abut against the first friction disc 141, and when the first friction disc 141 abuts against the second friction disc 142, the rotation is immediately stopped due to mutual friction, and meanwhile, the screw rod 13 fixedly connected with the first friction disc 141 is immediately stopped from rotating after receiving circumferential braking force, so that the screw rod 13 is quickly locked, and safety accidents are avoided. The scheme can judge whether the connection between the screw rod 13 and the motor 12 fails or not through whether the readings of the first encoder and the second encoder 15 are the same, and if the connection fails, the power failure alarm is timely realized, so that the brake device 14 immediately acts, and the screw rod 13 is locked.
In other embodiments, since the test motor 12 and the encoders of the screw 13 rotate at different speeds or angles, the range of encoder reading errors can be set so as to avoid erroneous judgment and to avoid locking the screw 13 under normal working conditions.
In this embodiment, the braking device 14 further includes a first guiding shaft 145, and the second friction disc 142 is sleeved outside the first guiding shaft 145 and reciprocates along the extending direction of the first guiding shaft 145. Specifically, with continued reference to fig. 2, the second friction disc 142 is sleeved on the outer ring of the first guiding shaft 145, and the first guiding shaft 145 can move in the first direction x or the second direction y. When the electromagnetic member 144 is electrified, attractive force in the second direction y is generated, the first guide shaft 145 drives the second friction disc 142 to move towards the second direction y so as to separate from the first friction disc 141, and the locking of the screw rod 13 is released; when detecting that the connection between the motor 12 and the screw rod 13 fails, the control member gives an outage alarm, the motor is powered off, the attractive force of the electromagnetic member 144 in the second direction y disappears, at this time, the elastic member 143 recovers to deform itself to generate thrust in the first direction x, and the first guide shaft 145 drives the second friction disc 142 to move towards the first direction x, and the second friction disc and the first friction disc 141 are mutually abutted to lock the screw rod 13.
In the present embodiment, the electromagnetic member 144 is annular and is sleeved outside the first guide shaft 145.
In this embodiment, the second friction disc 142 includes a friction portion 1421 and a moving portion 1422, the friction portion 1421 and the moving portion 1422 are annular, the friction portion 1421 is disposed opposite to the first friction disc 141 and between the electromagnetic member 144 and the first friction disc 141, and the moving portion 1422 is connected to a side of the friction portion 1421 away from the first friction disc 141 and between the first guide shaft 145 and the electromagnetic member 144. Specifically, the second friction disk 142 is composed of two parts: friction portion 1421 and moving portion 1422. The friction part 1421 and the moving part 1422 are both sleeved on the first guide shaft 145 in an annular manner, the friction part 1421 is used for abutting against the first friction disk 141 to generate circumferential braking force so as to lock the screw rod 13, and the friction part 1421 is positioned between the electromagnetic member 144 and the first friction disk 141. The moving portion 1422 is configured to connect to the friction portion 1421, and is located between the first guide shaft 145 and the electromagnetic member 144. The friction portion 1421 and the moving portion 1422 may be integrally designed or may be separately designed, which is not limited herein.
In the present embodiment, the support 11 includes a stand 111, a first bearing seat 112 disposed on the stand 111, and a second bearing seat 113 disposed on the stand 111, where the first bearing seat 112 and the second bearing seat 113 are disposed on the same side of the stand 111 at intervals; the screw 13 is rotatably provided to the first bearing housing 112 and the second bearing housing 113. Specifically, the support 11 includes a column 111, a screw rod 13 is sleeved on the column 111, one end of the screw rod 13 close to the motor 12 is connected to the support 11 through a first bearing block 112, and one end of the screw rod 13 far away from the motor 12 is connected to the support 11 through a second bearing block 113.
In the present embodiment, one end of the screw 13 near the motor 12 is rotatably connected to the first bearing housing 112 through the first bearing 1121, and one end of the screw 13 far from the motor 12 is rotatably connected to the second bearing housing 113 through the second bearing 1131. Specifically, the first bearing support 112 is internally provided with a first bearing 1121, the second bearing support 113 is internally provided with a second bearing 1131, and both ends of the screw rod 13 are respectively rotatably connected to the upright 111 through the first bearing 1121 and the second bearing 1131.
In the present embodiment, the screw 13 includes a guide rail 131, a nut seat 132, a first guide rail slider 133, a second guide rail slider 134, and a carriage 135. The guide rail 131 is arranged on the support 11, and the extending direction of the guide rail 131 is parallel to the extending direction of the screw rod 13; the nut seat 132 is in threaded connection with the screw rod 13, and the nut seat 132 is sleeved on the guide rail 131; the first guide rail sliding block 133 is slidably sleeved on the guide rail 131; the second guide rail slide block 134 is slidably sleeved on the guide rail 131, and the first guide rail slide block 133 and the second guide rail slide block 134 are respectively positioned at two sides of the nut seat 132; the carriage 135 is fixedly connected to the nut seat 132, the first rail slider 133 and the second rail slider 134.
Specifically, the outer surface of the screw rod 13 is provided with external threads, the nut seat 132 is provided with internal threads, the nut seat 132 is in threaded engagement with the screw rod 13, and when the screw rod 13 rotates, the nut seat 132 moves along the spiral line, thereby realizing linear motion. The guide rail 131 is arranged on the upright 111, the extending direction of the guide rail 131 is parallel to the extending direction of the screw rod 13, the nut seat 132 is sleeved on the guide rail 131, the first guide rail slide block 133 and the second guide rail slide block 134 are sleeved on the guide rail 131 in a sliding manner, the first guide rail slide block 133 and the second guide rail slide block 134 are respectively positioned on two sides of the nut seat 132, and the carriage 135 is fixedly connected to the nut seat 132, the first guide rail slide block 133 and the second guide rail slide block 134. When the screw rod 13 rotates, the nut seat 132 moves in the first direction x or the second direction y, so that the nut seat 132 drives the carriage 135 fixedly connected thereto to move in the first direction x or the second direction y. Meanwhile, the first guide rail slider 133 and the second guide rail slider 134 fixedly connected with the carriage 135 can also move along the guide rail 131 in the first direction x or the second direction y, and the first guide rail slider 133 and the second guide rail slider 134 can improve the stability of the carriage 135 during movement. In other embodiments, the first rail slider 133 and the second rail slider 134 may not be provided.
In this embodiment, when the motor 12 is energized, the screw rod 13 rotates, and the nut seat 132 moves along the spiral line, so that the carriage 135 fixedly connected to the nut seat 132 performs linear motion to perform operations such as machine tool machining; when the motor 12 is powered off, the brake device 14 acts immediately, and the screw rod 13 is locked rapidly to prevent the screw rod 13 from rotating under the action of gravity, so that the carriage 135 falls down, and the occurrence probability of safety accidents is reduced.
In this embodiment, the self-locking screw device 10 further includes a first shaft coupler 16 and a second shaft coupler 17, the screw 13 is connected to the motor 12 through the first shaft coupler 16 and the second shaft coupler 17, and the first shaft coupler 16 is disposed opposite to the second shaft coupler 17. Specifically, in order to ensure centering, the screw rod 13 is connected with the motor 12 through the first shaft connector 16, the second shaft connector 17, and the first shaft connector 16 and the second shaft connector 17 are connected by friction by adopting a keyless conical ring connection structure. If the cone ring between the first shaft coupling 16 and the second shaft coupling 17 is loosened and the friction is reduced, the connection between the screw rod 13 and the motor 12 fails, and the brake device 14 immediately acts to lock the screw rod 13. The brake 14 functions in the same manner as described above and will not be described in detail herein.
The present application also provides a machine tool comprising the self-locking screw device 10 according to any of the above embodiments.
To sum up, the present application adopts a self-locking screw device 10, where the self-locking screw device 10 includes a support 11, a motor 12, a screw 13, a braking device 14, a first encoder and a second encoder 15, and the braking device 14 includes a first friction disc 141, a second friction disc 142, an elastic member 143 and an electromagnetic member 144. When the readings of the first encoder and the second encoder 15 are different, it can be stated that the screw rod 13 and the motor 12 rotate relatively, the connection between the screw rod 13 and the motor 12 fails, the control member immediately sends a power-off alarm to the motor 12, the motor 12 stops working, the braking device 14 immediately acts after power-off, the attraction force of the electromagnetic member 144 to the second friction disc 142 in the second direction y disappears, at this time, the elastic member 143 resumes self deformation to generate thrust force in the first direction x, the elastic member 143 pushes the second friction disc 142 to abut against the first friction disc 141, and when the first friction disc 141 abuts against the second friction disc 142, the screw rod 13 fixedly connected with the first friction disc 141 immediately stops rotating due to mutual friction, thereby realizing quick locking of the screw rod 13 and avoiding occurrence of safety accidents. The self-locking screw rod device 10 provided by the application can timely find abnormality as long as the motor 12 and the screw rod 13 rotate relatively, and further expansion of faults is avoided. In addition, the self-locking screw rod device 10 is simple and reliable in structure, can play a role in both working and stopping of the machine tool, and reduces the accident probability.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.

Claims (10)

1. A self-locking screw assembly comprising:
a support;
the motor is arranged on the support;
the screw rod is rotationally arranged on the support and is connected with the motor;
the arresting gear, set up in the support, and be located the lead screw is kept away from the one end of motor, arresting gear includes:
the first friction disc is arranged at one end of the screw rod far away from the motor;
the second friction disc is movably arranged on the support and is opposite to the first friction disc;
the elastic piece is arranged on one side, away from the first friction disc, of the second friction disc, and can push the second friction disc to be abutted against the first friction disc;
the electromagnetic piece is arranged on one side, away from the first friction disc, of the second friction disc, the electromagnetic piece is electrified to generate attractive force for the second friction disc, and the attractive force can drive the second friction disc to overcome the thrust of the elastic piece and separate from the first friction disc.
2. The self-locking screw arrangement of claim 1, wherein the braking arrangement further comprises:
the first encoder is arranged on the motor;
the second encoder is arranged at one end of the screw rod, which is close to the motor, and the second encoder is arranged corresponding to the first encoder;
and the control part is electrically connected with the first encoder and the second encoder and is electrically connected with the motor.
3. The self-locking screw device according to claim 1, wherein the brake device further comprises a first guide shaft, and the second friction disc is sleeved outside the first guide shaft and reciprocates along the extending direction of the first guide shaft.
4. The self-locking screw device according to claim 3, wherein the electromagnetic member is ring-shaped and is sleeved outside the first guide shaft.
5. The self-locking screw device according to claim 4, wherein the second friction plate comprises a friction part and a moving part, the friction part and the moving part are annular, the friction part is opposite to the first friction plate and is located between the electromagnetic member and the first friction plate, and the moving part is connected to one side of the friction part away from the first friction plate and is located between the first guide shaft and the electromagnetic member.
6. A self-locking screw arrangement according to claim 1, characterized in that,
the support comprises a stand column, a first bearing seat arranged on the stand column and a second bearing seat arranged on the stand column, and the first bearing seat and the second bearing seat are arranged on the same side of the stand column at intervals; the screw rod is rotatably arranged on the first bearing seat and the second bearing seat.
7. The self-locking screw assembly of claim 6, wherein,
one end of the screw rod, which is close to the motor, is rotationally connected with the first bearing seat through a first bearing, and one end of the screw rod, which is far away from the motor, is rotationally connected with the second bearing seat through a second bearing.
8. The self-locking screw arrangement of claim 6, wherein the screw comprises:
the guide rail is arranged on the support, and the extending direction of the guide rail is parallel to the extending direction of the screw rod;
the nut seat is in threaded connection with the screw rod and sleeved on the guide rail;
the first guide rail sliding block is sleeved on the guide rail in a sliding way;
the second guide rail sliding block is sleeved on the guide rail in a sliding manner, and the first guide rail sliding block and the second guide rail sliding block are respectively positioned at two sides of the nut seat;
and the carriage is fixedly connected to the nut seat, the first guide rail sliding block and the second guide rail sliding block.
9. A self-locking screw arrangement according to claim 1, characterized in that,
the self-locking screw rod device further comprises a first shaft connector and a second shaft connector, the screw rod is connected with the motor through the first shaft connector and the second shaft connector, and the first shaft connector and the second shaft connector are oppositely arranged.
10. A machine tool comprising a self-locking screw arrangement according to any one of the preceding claims 1-9.
CN202310601680.1A 2023-05-25 2023-05-25 Self-locking screw rod device and machine tool Pending CN116551441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310601680.1A CN116551441A (en) 2023-05-25 2023-05-25 Self-locking screw rod device and machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310601680.1A CN116551441A (en) 2023-05-25 2023-05-25 Self-locking screw rod device and machine tool

Publications (1)

Publication Number Publication Date
CN116551441A true CN116551441A (en) 2023-08-08

Family

ID=87501666

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310601680.1A Pending CN116551441A (en) 2023-05-25 2023-05-25 Self-locking screw rod device and machine tool

Country Status (1)

Country Link
CN (1) CN116551441A (en)

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