CN116771874A - Lifting type anti-reversing transmission device with screw rod - Google Patents
Lifting type anti-reversing transmission device with screw rod Download PDFInfo
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- CN116771874A CN116771874A CN202311029804.XA CN202311029804A CN116771874A CN 116771874 A CN116771874 A CN 116771874A CN 202311029804 A CN202311029804 A CN 202311029804A CN 116771874 A CN116771874 A CN 116771874A
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- transmission
- screw rod
- damping grease
- caulking groove
- interlayer
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 152
- 238000013016 damping Methods 0.000 claims abstract description 71
- 239000004519 grease Substances 0.000 claims abstract description 70
- 239000011229 interlayer Substances 0.000 claims abstract description 59
- 230000001050 lubricating effect Effects 0.000 claims abstract description 27
- 230000002441 reversible effect Effects 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 230000002829 reductive effect Effects 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 230000033001 locomotion Effects 0.000 claims description 9
- 238000005461 lubrication Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 5
- 238000001356 surgical procedure Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
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- 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
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- 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
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
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- 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
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0497—Screw mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The application relates to a lifting type self-carrying screw rod anti-reversing transmission device which comprises a motor, a speed reducer, a transmission screw rod, a transmission nut, a one-way clutch, a contact seat, a shaft end mounting seat, a lubricating sheet and a damping grease interlayer, wherein the contact seat comprises a contact sheet and a connecting sleeve, the one-way clutch is in transition fit with the inner wall of the connecting sleeve, the shaft end mounting seat fixedly connects the contact seat with the shaft end of the transmission screw rod, and the damping grease interlayer is positioned between the lubricating sheet and the contact sheet. According to the application, not only can the static friction force formed by the damping grease interlayer, the contact piece and the lubricating piece lock the transmission screw rod to prevent reverse rotation when the motor stops working and the transmission nut is in a static state, so that the use risk under special working conditions is reduced, but also the friction and abrasion are reduced through the extrusion deformation of the damping grease interlayer when the motor needs to rotate reversely, the service life of the screw rod is prolonged, and in addition, the structure is simple, the implementation is convenient, and the cost is low.
Description
Technical Field
The application belongs to the technical field of transmission, and particularly relates to an anti-reversing transmission device with a lifting type self-contained screw rod.
Background
It is well known that a transmission transmits the power of a power mechanism to a working mechanism to achieve a desired movement, such as: lifting motion, traversing motion, circular motion and the like, wherein for lifting motion, once the lifting height requirement is higher, a transmission screw rod structure is generally adopted, and the lifting device comprises a transmission screw rod extending up and down, a transmission nut matched with the transmission screw rod and a power component for driving the transmission screw rod to rotate, wherein the power component and the transmission screw rod are synchronous through a coupler, an output seat is formed by the transmission nut, and lifting adjustment is carried out in the rotation of the transmission screw rod so as to meet the lifting requirement.
However, under some special conditions (such as setting of height in rehabilitation or surgery), when the output seat stays at a certain position, the output seat is subjected to a large downward pressure, so that the inversion (or reverse rotation) of the transmission screw rod is caused, and no limitation on the rotation direction is formed between the power component and the transmission screw rod, therefore, under the inversion of the transmission screw rod, the output seat moves down, so that the output seat cannot stay at the set position accurately, and particularly, in rehabilitation or surgery, there is a great risk (safety, surgery success rate and the like).
Disclosure of Invention
The application aims to solve the technical problem of overcoming the defects of the prior art and providing an improved lifting type anti-reverse transmission device with a screw rod.
In order to solve the technical problems, the application adopts the following technical scheme:
the lifting type anti-reverse transmission device with the screw rod comprises a motor, a speed reducer, a transmission screw rod and a transmission nut, wherein the transmission screw rod is arranged up and down, the speed reducer is used for butting the end part of the transmission screw rod with an output shaft of the motor, and a reduction box body of the speed reducer is fixedly connected with the motor; the transmission nut is lifted up and down in forward and reverse rotation of the transmission screw rod, and particularly, the transmission device further comprises a one-way clutch, a contact seat and a shaft end mounting seat which are coaxial with the transmission screw rod and are sleeved in sequence from inside to outside; a lubrication sheet fixedly mounted on the reduction gearbox body; the damping grease interlayer is positioned between the lubricating sheet and the contact sheet, when the motor stops working and the transmission nut is in a static state, static friction force formed by the damping grease interlayer, the contact sheet and the lubricating sheet locks the transmission screw rod to prevent reverse rotation, and the one-way clutch has two states of separation and coupling, wherein when the one-way clutch is in a separation state, the transmission screw rod rotates freely relative to the one-way clutch, and the transmission nut rises and falls relatively; when the damping grease interlayer is in a coupling state, the transmission screw rod, the one-way clutch and the contact seat are integrally and relatively fixed, the motor provides a force larger than the locking force, the transmission screw rod reversely rotates, the contact sheet extrudes the damping grease interlayer into the lubricating sheet so as to reduce the friction force between the contact sheet and the damping grease interlayer, and the transmission nut relatively ascends and descends.
According to a specific implementation and preferred aspect of the application, the butt end surfaces of the lubricating piece and the contact piece are respectively provided with a first caulking groove and a second caulking groove which are concave inwards, the damping grease interlayer is extruded between the lubricating piece and the contact piece, and two opposite sides of the damping grease interlayer are respectively extruded into the first caulking groove and the second caulking groove, wherein a containing cavity formed by the first caulking groove is larger than a containing cavity formed by the second caulking groove, and after the lubricating piece, the contact piece and the damping grease interlayer are assembled, a residual cavity is formed inside the first caulking groove. Here, the collection of the compression set is performed by the residual chamber to change the magnitude of the positive pressure (i.e., change the frictional force), reducing the friction between the contact sheet and the lubrication sheet and damping grease barrier.
In one specific implementation and preferred aspect, the one-way clutch is in a coupled state, and when the drive screw rotates in a reverse direction, the damping grease in the second caulking groove is gradually extruded and extruded into the residual cavity so as to reduce friction force between the contact piece and the damping grease interlayer.
According to a further embodiment and preferred aspect of the application, the second grooves are provided in a plurality, each of the second grooves being distributed from deep to shallow around the center of the contact piece and simultaneously ejecting the damping grease in the second grooves outwardly to the residual cavity upon rotation. The step-by-step extrusion is implemented by adopting a deep-to-shallow layout, a plurality of second caulking grooves are distributed in an annular array and in an arithmetic array from inside to outside, meanwhile, when the damping grease interlayer loses the outward collision of the second caulking grooves, part of damping grease can fall back into the second caulking grooves and form corresponding residual cavities, in some specific embodiments, the continuous extrusion movement of the second caulking grooves causes the two sides of the damping grease interlayer to change between the opposite residual cavities, so that the friction force formed between the damping grease interlayer and the contact piece is changed. Not only is favorable for reversing high-precision control, but also effectively prolongs the service life.
In one specific implementation and preferred aspect, the lubricant sheet is annular and the annular surface forms a plurality of cylindrical grooves distributed in a rectangular array, wherein the center of the rectangular array is aligned with the center of the annular shape, and the plurality of cylindrical grooves form the first caulking groove. The deformation layout of the two sides is different, so that the residual cavity is formed more effectively to change the extrusion force, the assistance is further provided for reversing, the locking force generated when the transmission nut is kept still is further improved, the probability of anti-reversing of the transmission screw rod is reduced, and meanwhile, the better deformation capability is considered, and the cylindrical groove parts positioned on the peripheral inner ring or the peripheral outer ring are communicated with the outside.
According to a further specific implementation and preferred aspect of the present application, the shaft end mounting seat comprises a mounting bearing fixedly sleeved on the periphery of the connecting sleeve and abutting against the contact piece, and an end cover blocked on the outer end of the mounting bearing and abutting against the shaft end of the transmission screw, wherein the mounting bearing, the end cover and the transmission screw are coaxial. Under this structural layout, not only ensure rotation balance, further reduce the relative transmission lead screw's axle looks and produce the mobility probability moreover, when improving transmission lead screw reversal, the synchronism of axle head mount pad, one-way clutch, contact seat and transmission lead screw.
In a specific implementation and preferred aspect, the transmission screw rod comprises a threaded section, a first shaft end and a second shaft end which are positioned at two ends of the threaded section, wherein the first shaft end is in a stepped shaft shape and is in butt joint with the speed reducer, the end cover is sleeved on the stepped shaft, and the two end faces respectively abut against the end face of the threaded section and the end face of the mounting bearing; the second shaft end is rotatably arranged on the corresponding shaft seat. The speed reducer comprises a speed reducing seat rotationally connected with the speed reducing box body through a rotating bearing and a transmission part in transmission connection with the output shaft, wherein the end part of the stepped shaft is matched and butted with the speed reducing seat, in some specific embodiments, the end part of the stepped shaft is in a frustum shape with gradually reduced outer diameter from inside to outside, and a conical matching hole matched with the frustum shape is formed in the speed reducing seat.
In addition, the transmission screw rod and the transmission nut are matched to form a ball screw, wherein when the transmission screw rod rotates forwards, the one-way clutch is in a separation state, and the transmission nut is lifted upwards relative to the ball screw; when the transmission screw rod reversely rotates and forms a torque larger than resistance torque formed by the damping grease interlayer, the contact piece and the lubricating piece, the one-way clutch is in a coupling state, the contact piece synchronously moves with the ball screw rod and keeps friction with the damping grease interlayer, and the transmission nut descends downwards relative to the ball screw rod.
In one specific implementation and preferred aspect, the one-way clutch is a one-way needle thrust bearing.
Due to the implementation of the technical scheme, compared with the prior art, the application has the following advantages:
the existing lifting type screw rod transmission device cannot accurately stay at a set position when an output seat is static due to the fact that the limitation of the rotation direction is not formed between a power component and a transmission screw rod, and the transmission screw rod is inverted once the transmission screw rod is subjected to external force, so that the use condition of lifting height setting cannot be met, particularly, in rehabilitation or operation, great risks (safety, operation success rate and the like) exist, and various defects of the existing structure are skillfully solved through the integral design of the structure of the transmission device. After the transmission device is adopted, the transmission screw is separated and coupled relative to the one-way clutch through the control of the one-way clutch so as to control the forward and reverse rotation of the screw, lifting of the transmission nut is carried out, meanwhile, static friction force formed by the damping grease interlayer, the contact piece and the lubricating piece is used for locking the transmission screw to prevent reverse rotation when the motor stops working and the transmission nut is in a static state, then in a coupling state, the transmission screw reversely rotates after the motor provides force required by locking, the damping grease interlayer is extruded into the lubricating piece by the contact piece so as to reduce friction force between the contact piece and the damping grease interlayer, and therefore, compared with the existing structure, the application not only can realize locking of the transmission screw to prevent reverse rotation when the motor stops working and the transmission nut is in a static state, reduce the use risk under special working conditions, but also reduce friction and abrasion through extrusion deformation of the damping grease interlayer when reverse rotation is required, and the transmission device is simple in structure, convenient to implement and low in cost.
Drawings
The application will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is an exploded view of the lifting type anti-reverse transmission device with a screw rod according to the present embodiment;
FIG. 2 is a schematic front view of the assembled structure of FIG. 1 (partially omitted);
FIG. 3 is an enlarged partial semi-sectional schematic view of FIG. 2;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a schematic view of an axial projection of a lubricant sheet according to the present embodiment from an end surface of a first caulking groove;
fig. 6 is an axial projection schematic diagram of the contact piece of the present embodiment formed from the end surface where the second caulking groove is located;
wherein: 1. a motor; 10. an output shaft;
2. a speed reducer; 20. a reduction gearbox body; 21. a rotating bearing; 22. a speed reducing seat; 23. a transmission member; 230. a planetary gear;
3. a transmission screw rod; 30. a threaded section; 31. a first shaft end; 32. a second axial end;
4. a drive nut;
5. a one-way clutch;
6. a contact base; 60. a contact piece; q2, a second caulking groove; 61. connecting sleeves;
7. a shaft end mounting seat; 70. mounting a bearing; 71. an end cap;
8. a lubrication sheet; q1, a first caulking groove;
9. damping grease barrier.
Detailed Description
The present application will be described in detail with reference to the drawings and the detailed description, so that the above objects, features and advantages of the present application can be more clearly understood. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above" and "over" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under," "under" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions are used herein for illustrative purposes only and are not meant to be the only embodiment.
As shown in fig. 1 to 4, the lifting type self-carrying screw anti-reversing transmission device of the present embodiment is particularly suitable for lifting adjustment in rehabilitation or surgical treatment, and the transmission device comprises a motor 1, a speed reducer 2, a transmission screw 3, a transmission nut 4 forming a ball screw structure with the transmission screw 3, a one-way clutch 5, a contact seat 6, a shaft end mounting seat 7, a lubricating sheet 8 and a damping grease interlayer 9.
In some embodiments, the motor 1 is located at the upper part and the output shaft 10 extends up and down, the speed reducer 2 is fixedly connected with the lower part of the motor 1 through the speed reducing box 20, the speed reducer 2 can also drive and connect the output shaft 10 with the upper end part of the transmission screw 3 extending up and down, the one-way clutch 5 is a one-way needle roller thrust bearing and is coaxially installed at the upper end part of the transmission screw 3, the contact seat 6 comprises a contact piece 60 and a connecting sleeve 61, the one-way clutch 5 is in transition fit with the inner wall of the connecting sleeve 61, the shaft end mounting seat 4 fixedly connects the contact seat 6 with the shaft end of the transmission screw 3, the lubricating piece 8 is fixedly installed on the speed reducing box 20, the damping grease interlayer 9 is located between the lubricating piece 8 and the contact piece 60, when the motor 1 stops working and the transmission nut 4 is in a standing state, the static friction force formed by the damping grease interlayer 9, the contact piece 60 and the lubricating piece 8 is used for locking the transmission screw 3 to realize anti-reverse, and the one-way clutch 5 has two states of separation and coupling, wherein in the separation state, the transmission screw 3 rotates freely relative to the one-way clutch 5, and the transmission nut 4 moves relatively up and down; when the motor is in a coupling state, the transmission screw rod 3, the one-way clutch 5 and the contact seat 6 are integrally and relatively fixed, the motor 1 provides a force larger than the locking required force, the transmission screw rod 3 reversely rotates, the contact piece 60 extrudes the damping grease interlayer 9 into the lubricating piece 8 so as to reduce the friction force between the contact piece 60 and the damping grease interlayer 9, and the transmission nut 4 relatively ascends and descends.
As shown in fig. 5 and 6, the abutting end surfaces of the lubricating piece 8 and the contact piece 60 are respectively provided with a first caulking groove q1 and a second caulking groove q2 which are concave inwards, when the damping grease interlayer 9 is extruded between the lubricating piece 8 and the contact piece 60, and two opposite sides of the damping grease interlayer are respectively extruded into the first caulking groove q1 and the second caulking groove q2, wherein the containing cavity formed by the first caulking groove q1 is larger than the containing cavity formed by the second caulking groove q2, so that after the lubricating piece 8, the contact piece 60 and the damping grease interlayer 9 are assembled, the residual cavity is formed inside the first caulking groove q 1.
In some embodiments, the lubricant sheet 8 is annular (which is arranged coaxially with the drive screw 3) and the annular surface forms a plurality of cylindrical grooves distributed in a rectangular array, wherein the centers of the rectangular array and the annular center are aligned, the plurality of cylindrical grooves forming a first caulking groove, while the portions of the cylindrical grooves located in the peripheral inner or outer ring communicate with the outside in view of better deformability. The second caulking grooves q2 are multiple, each second caulking groove q2 is distributed from deep to shallow around the center of the contact piece 60, and damping grease in the second caulking grooves q2 is synchronously ejected outwards to the residual cavities during rotation, in this example, the plurality of second caulking grooves q2 are divided into two annular whole rows (of course, more than one second caulking groove q2 can be arranged), and are distributed in an equal-differential array from inside to outside, meanwhile, when the damping grease interlayer 9 loses the outward collision of the second caulking grooves q2, part of damping grease can fall back into the second caulking grooves q2 and form corresponding residual cavities, that is, the continuous extrusion movement of the second caulking grooves q2 causes the two sides of the damping grease interlayer to change between the opposite residual cavities, so that the friction force formed between the damping grease interlayer 9 and the contact piece 60 is variable, and the reverse rotation of the transmission screw rod 3 under the coupling state is more facilitated.
Further, the shaft end mounting seat 7 comprises a mounting bearing 70 fixedly sleeved on the periphery of the connecting sleeve 61 and abutting against the contact piece 60, and an end cover 71 blocked at the outer end of the mounting bearing 70 and abutting against the shaft end of the transmission screw 3, wherein the mounting bearing 70, the end cover 71 and the transmission screw 3 are coaxial. The transmission screw rod 3 comprises a threaded section 30, a first shaft end 31 and a second shaft end 32 which are positioned at the upper end and the lower end of the threaded section 30, wherein the first shaft end 31 is in a stepped shaft shape and is in butt joint with the speed reducer 2, the end cover 71 is sleeved on the stepped shaft, and the two end faces respectively abut against the upper end face of the threaded section 30 and the lower end face of the mounting bearing 70; the second shaft end 31 is rotatably mounted on the corresponding shaft seat.
The speed reducer 2 comprises a speed reducing seat 22 rotatably connected with the speed reducing box 20 through a rotating bearing 21, and a transmission piece 23 for transmitting and connecting the speed reducing seat 22 with the output shaft 10, wherein the end part of the stepped shaft is matched and butted with the speed reducing seat 22, in some specific embodiments, the end part of the stepped shaft is in a conical table shape with gradually reduced inner and outer diameters, a conical matching hole matched with the conical table shape is formed in the speed reducing seat 22, meanwhile, the speed reducing seat 22 is a conventional gear seat, and the transmission piece 23 adopts two or more planetary gears 230 to be meshed with gears arranged on the output shaft 10 to implement speed reducing transmission, thus the speed reducing mechanism belongs to a conventional planetary gear type speed reducing structure in the field, and the specific principle of the speed reducing mechanism is not explained herein, and the speed reducing mechanism is clearly practicable.
In addition, in the actual use process of the transmission device, when the transmission screw rod 3 rotates forwards, the one-way clutch 5 is in a separated state, and the transmission nut 5 is lifted upwards relative to the ball screw; when the transmission screw rod 3 rotates reversely and forms a torque larger than resistance torque formed by the damping grease interlayer 9, the contact piece 60 and the lubrication piece 80, the one-way clutch 5 is in a coupling state, the contact piece 60 moves synchronously with the ball screw and keeps friction with the damping grease interlayer 9, the transmission nut 5 descends downwards relative to the ball screw, meanwhile, once the motor 1 stops working and the transmission nut 4 is kept standing, the damping grease interlayer 9 is extruded and embedded into the corresponding first caulking groove q1 and the corresponding second caulking groove q2, static friction force formed by the damping grease interlayer 9, the contact piece 60 and the lubrication piece 8 is used for locking the transmission screw rod 3 to prevent reverse rotation, and particularly, the one-way clutch 5 is in a coupling state, and when the transmission screw rod 3 rotates reversely, damping grease in the second caulking groove q2 is extruded in a corresponding residual cavity gradually to reduce friction force between the contact piece 60 and the damping grease interlayer 9.
In summary, after the transmission device is adopted, the transmission screw is separated and coupled relative to the one-way clutch through the control of the one-way clutch so as to control the forward and reverse rotation of the screw, lifting of the transmission nut is performed, meanwhile, when the motor stops working and the transmission nut is in a static state, static friction force formed by the damping grease interlayer, the contact piece and the lubricating piece is used for locking the transmission screw to prevent reverse rotation, and then in a coupling state, the motor provides force required by locking, the transmission screw reversely rotates, and the contact piece extrudes the damping grease interlayer into the lubricating piece to reduce friction force between the contact piece and the damping grease interlayer, so that compared with the existing structure, the application not only can realize the anti-reverse rotation of the locking transmission screw when the motor stops working and the transmission nut is in the static state, reduce the use risk under special working conditions, but also can reduce friction and abrasion through extrusion deformation of the damping grease interlayer when the reverse rotation is required, prolong the service life of the screw, in addition, the structure is simple, the implementation is convenient, and the cost is low; on the other hand, in the descending process of the transmission nut, two sides of the damping grease interlayer change between the opposite residual cavities, so that the friction force formed between the damping grease interlayer and the contact piece is changed, the reverse rotation of the transmission screw rod in a coupling state is facilitated, the reverse rotation control precision is high, and the abrasion is small; the restriction of coaxial and axial installation that the third aspect adopted not only has higher rotation synchronism, can not produce the displacement in the axial moreover, and the lifting precision is high, satisfies special operating mode, like: in rehabilitation or operation, the risk is reduced, the rehabilitation effect is improved, the success rate of the operation is improved, and the like; the fourth aspect adopts the caulking grooves with different array arrangements, different shapes and different cavity sizes, is convenient for damping fat deformation in static and motion, and achieves the required rotation and locking effect.
The present application is described in detail above, but the present application is not limited to the above-described embodiments. All equivalent changes or modifications made in accordance with the spirit of the present application should be construed to be included in the scope of the present application.
Claims (14)
1. The lifting type anti-reverse transmission device with the screw rod comprises a motor, a speed reducer, a transmission screw rod and a transmission nut, wherein the transmission screw rod is arranged up and down, the speed reducer is used for butting the end part of the transmission screw rod with an output shaft of the motor, and a speed reduction box body of the speed reducer is fixedly connected with the motor; the transmission nut is lifted up and down in forward and reverse rotation of the transmission screw rod, and is characterized in that: the transmission device also comprises a one-way clutch, a contact seat and a shaft end mounting seat which are coaxial with the transmission screw rod and are sleeved in sequence from inside to outside; the lubricating piece is fixedly arranged on the reduction gearbox body; the damping grease interlayer is positioned between the lubricating sheet and the contact sheet, when the motor stops working and the transmission nut is in a static state, static friction force formed by the damping grease interlayer, the contact sheet and the lubricating sheet is used for locking the transmission screw rod to prevent reverse rotation, and the one-way clutch has two states of separation and coupling, wherein in the separation state, the transmission screw rod rotates freely relative to the one-way clutch, and the transmission nut is lifted relatively; when the damping grease interlayer is in a coupling state, the transmission screw rod, the one-way clutch and the contact seat are integrally and relatively fixed, the motor provides force required by locking, the transmission screw rod reversely rotates, the contact piece extrudes the damping grease interlayer into the lubricating piece so as to reduce friction force between the contact piece and the damping grease interlayer, and the transmission nut relatively ascends and descends.
2. The lifting self-contained lead screw anti-backup transmission of claim 1, wherein: the anti-vibration device comprises a contact piece, a lubrication piece, a damping grease interlayer, a first caulking groove, a second caulking groove, a damping grease interlayer and a lubricant piece, wherein the first caulking groove and the second caulking groove are respectively arranged on the butt joint end face of the contact piece, the first caulking groove and the second caulking groove are inwards recessed, the damping grease interlayer is extruded between the lubrication piece and the contact piece, and opposite sides of the damping grease interlayer are respectively extruded into the first caulking groove and the second caulking groove, a containing cavity formed by the first caulking groove is larger than a containing cavity formed by the second caulking groove, and after the lubrication piece, the contact piece and the damping grease interlayer are assembled, a residual cavity is formed inside the first caulking groove.
3. The lifting self-contained lead screw anti-backup transmission of claim 2, wherein: when the one-way clutch is in a coupling state and the transmission screw rod rotates reversely, damping grease in the second caulking groove is extruded gradually and extruded into the residual cavity so as to reduce friction force between the contact piece and the damping grease interlayer.
4. A lifting self-contained lead screw anti-backup transmission as claimed in claim 3, wherein: the second caulking grooves are distributed from deep to shallow around the center of the contact piece, and damping grease in the second caulking grooves is synchronously ejected outwards to the residual cavity during rotation.
5. The lifting self-contained lead screw anti-backup transmission of claim 4, wherein: the second caulking grooves are distributed in an annular array and are distributed in an equi-differential number array from inside to outside.
6. The lifting self-contained lead screw anti-backup transmission of claim 5, wherein: when the damping grease interlayer loses the outward collision of the second caulking groove, part of damping grease can fall back into the second caulking groove and form a corresponding residual cavity, wherein two sides of the damping grease interlayer change between the opposite residual cavities in the continuous extrusion movement of the second caulking groove.
7. The lifting self-contained lead screw anti-backup transmission of claim 2, wherein: the lubrication sheet is annular, a plurality of cylindrical grooves distributed in a rectangular array are formed on the annular surface, the centers of the rectangular array are aligned with the centers of the annular shape, and a plurality of cylindrical grooves form the first caulking groove.
8. The lifting self-contained lead screw anti-backup transmission of claim 7, wherein: each of the cylindrical groove portions located in the peripheral inner ring or the peripheral outer ring communicates with the outside.
9. The lifting self-contained lead screw anti-backup transmission of claim 1, wherein: the shaft end mounting seat comprises a mounting bearing fixedly sleeved on the periphery of the connecting sleeve and abutting against the contact piece, and an end cover blocked at the outer end of the mounting bearing and abutting against the shaft end of the transmission screw rod, wherein the mounting bearing, the end cover and the transmission screw rod are coaxial.
10. The lifting self-contained lead screw anti-backup transmission of claim 9, wherein: the transmission screw rod comprises a threaded section, a first shaft end and a second shaft end which are positioned at two end parts of the threaded section, wherein the first shaft end is in a stepped shaft shape and is in butt joint with the speed reducer, the end cover is sleeved on the stepped shaft, and the two end surfaces are respectively abutted against the end surfaces of the threaded section and the end surface of the mounting bearing; the second shaft end is rotatably arranged on the corresponding shaft seat.
11. The lifting self-contained lead screw anti-backup transmission of claim 10, wherein: the speed reducer comprises a speed reducing seat which is rotationally connected with the speed reducing box body through a rotating bearing, and a transmission piece which is used for transmitting and connecting the speed reducing seat with the output shaft, wherein the end part of the stepped shaft is matched and butted with the speed reducing seat.
12. The lifting self-contained lead screw anti-backup transmission of claim 11, wherein: the end part of the stepped shaft is in a frustum shape with the outer diameter gradually reduced from inside to outside, and the speed reducing seat is provided with a conical matching hole matched with the frustum shape.
13. The lifting self-contained lead screw anti-backup transmission of claim 1, wherein: the transmission screw rod and the transmission nut are matched to form a ball screw, wherein when the transmission screw rod rotates forwards, the one-way clutch is in a separation state, and the transmission nut is lifted upwards relative to the ball screw; when the transmission screw rod reversely rotates and forms a torque larger than resistance torque formed by the damping grease interlayer, the contact piece and the lubricating piece, the one-way clutch is in a coupling state, the contact piece synchronously moves with the ball screw rod and keeps friction with the damping grease interlayer, and the transmission nut descends downwards relative to the ball screw rod.
14. The lifting self-contained lead screw anti-backup transmission of claim 1, wherein: the one-way clutch is a one-way needle roller thrust bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311029804.XA CN116771874B (en) | 2023-08-16 | 2023-08-16 | Lifting type anti-reversing transmission device with screw rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311029804.XA CN116771874B (en) | 2023-08-16 | 2023-08-16 | Lifting type anti-reversing transmission device with screw rod |
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| CN116771874A true CN116771874A (en) | 2023-09-19 |
| CN116771874B CN116771874B (en) | 2023-11-14 |
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| CN202311029804.XA Active CN116771874B (en) | 2023-08-16 | 2023-08-16 | Lifting type anti-reversing transmission device with screw rod |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161163A (en) * | 2011-03-23 | 2011-08-24 | 桂林机床股份有限公司 | Unidirectional rotating shaft locking device |
| CN103453044A (en) * | 2013-09-17 | 2013-12-18 | 吉林大学 | Vehicular actuator for automatic clutches |
| CN104482069A (en) * | 2014-12-04 | 2015-04-01 | 湖南江麓容大车辆传动股份有限公司 | Clutch lubrication device |
| CN110778673A (en) * | 2019-09-12 | 2020-02-11 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of linear actuator and linear actuator |
| CN210739294U (en) * | 2019-09-12 | 2020-06-12 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of linear actuator and linear actuator |
| CN211202782U (en) * | 2019-09-19 | 2020-08-07 | 吴昌御 | Screw rod mechanism |
| CN211715696U (en) * | 2019-12-26 | 2020-10-20 | 浙江捷昌线性驱动科技股份有限公司 | Brake device of linear actuator and linear actuator |
| CN213039769U (en) * | 2020-05-14 | 2021-04-23 | 沈阳新宝路航空科技有限公司 | Backstop for ball screw pair |
| CN214499942U (en) * | 2021-01-14 | 2021-10-26 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of electric actuating mechanism and electric actuating mechanism |
| CN215171903U (en) * | 2021-05-18 | 2021-12-14 | 浙江捷昌线性驱动科技股份有限公司 | Linear actuator and lifting platform |
| CN215521832U (en) * | 2021-02-01 | 2022-01-14 | 常州市凯迪电器股份有限公司 | Friction self-locking device with one-way adjustable damping |
| CN216530930U (en) * | 2021-10-21 | 2022-05-13 | 东莞市兆威机电有限公司 | Linear motor and device using same |
| CN217558928U (en) * | 2022-06-14 | 2022-10-11 | 浙江乐歌智能驱动科技有限公司 | One-way self-locking device for linear driving mechanism |
| CN217647997U (en) * | 2022-07-11 | 2022-10-25 | 岳阳岳机机床制造有限公司 | Be used for horizontal feeding ball screw of numerical control merry go round machine |
| CN115325054A (en) * | 2022-07-07 | 2022-11-11 | 武汉步锐科汽车工业科技有限责任公司 | Thrust actuating mechanism and brake |
-
2023
- 2023-08-16 CN CN202311029804.XA patent/CN116771874B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161163A (en) * | 2011-03-23 | 2011-08-24 | 桂林机床股份有限公司 | Unidirectional rotating shaft locking device |
| CN103453044A (en) * | 2013-09-17 | 2013-12-18 | 吉林大学 | Vehicular actuator for automatic clutches |
| CN104482069A (en) * | 2014-12-04 | 2015-04-01 | 湖南江麓容大车辆传动股份有限公司 | Clutch lubrication device |
| CN110778673A (en) * | 2019-09-12 | 2020-02-11 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of linear actuator and linear actuator |
| CN210739294U (en) * | 2019-09-12 | 2020-06-12 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of linear actuator and linear actuator |
| CN211202782U (en) * | 2019-09-19 | 2020-08-07 | 吴昌御 | Screw rod mechanism |
| CN211715696U (en) * | 2019-12-26 | 2020-10-20 | 浙江捷昌线性驱动科技股份有限公司 | Brake device of linear actuator and linear actuator |
| CN213039769U (en) * | 2020-05-14 | 2021-04-23 | 沈阳新宝路航空科技有限公司 | Backstop for ball screw pair |
| CN214499942U (en) * | 2021-01-14 | 2021-10-26 | 浙江捷昌线性驱动科技股份有限公司 | Self-locking device of electric actuating mechanism and electric actuating mechanism |
| CN215521832U (en) * | 2021-02-01 | 2022-01-14 | 常州市凯迪电器股份有限公司 | Friction self-locking device with one-way adjustable damping |
| CN215171903U (en) * | 2021-05-18 | 2021-12-14 | 浙江捷昌线性驱动科技股份有限公司 | Linear actuator and lifting platform |
| CN216530930U (en) * | 2021-10-21 | 2022-05-13 | 东莞市兆威机电有限公司 | Linear motor and device using same |
| CN217558928U (en) * | 2022-06-14 | 2022-10-11 | 浙江乐歌智能驱动科技有限公司 | One-way self-locking device for linear driving mechanism |
| CN115325054A (en) * | 2022-07-07 | 2022-11-11 | 武汉步锐科汽车工业科技有限责任公司 | Thrust actuating mechanism and brake |
| CN217647997U (en) * | 2022-07-11 | 2022-10-25 | 岳阳岳机机床制造有限公司 | Be used for horizontal feeding ball screw of numerical control merry go round machine |
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| Publication number | Publication date |
|---|---|
| CN116771874B (en) | 2023-11-14 |
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