CN108286596B - Linear motion output device - Google Patents
Linear motion output device Download PDFInfo
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- CN108286596B CN108286596B CN201710017694.3A CN201710017694A CN108286596B CN 108286596 B CN108286596 B CN 108286596B CN 201710017694 A CN201710017694 A CN 201710017694A CN 108286596 B CN108286596 B CN 108286596B
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- driving
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- sliding block
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- linear motion
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- 230000007246 mechanism Effects 0.000 claims abstract description 51
- 230000008859 change Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a linear motion output device, which comprises a driving mechanism and a sliding block, wherein the driving mechanism is of a rotatable structure, and a plurality of driving pieces which are uniformly distributed along the circumferential direction of the driving mechanism are arranged on the driving mechanism; the sliding block can slide along a straight line, and a plurality of baffles are uniformly distributed on the sliding block along the sliding direction; the driving piece is in interference fit with the baffle along with the rotation of the driving mechanism and slides from the first end of the baffle to the second end of the baffle so as to push the sliding block to slide along a straight line, and before one driving piece leaves the second end of the baffle contacted with the driving piece, the other driving piece adjacent to the driving piece is in interference fit with the first end of the other baffle on the sliding block; therefore, the linear motion output device has the advantages of simple structure, convenience in manufacturing and installation, low production cost and capability of continuously outputting unidirectional linear motion.
Description
Technical Field
The invention relates to the technical field of power output devices, in particular to a linear motion output device.
Background
In addition to the linear motor, the motion mode of the motor output commonly used at present is rotation, and most of motors exist in the form of torque as a driving source. Therefore, in the occasion of needing linear driving, a transmission mechanism for converting rotary motion into linear motion needs to be added, and the currently common transmission mechanisms are as follows: ball screw mechanisms, rack and pinion mechanisms, cam link mechanisms, and the like.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a ball screw mechanism in the prior art, the ball screw mechanism is composed of a screw 100, a screw nut 101, a raceway 102 and balls 103, and converts rotary motion into linear motion in the form of a thread curve, and since the lead angle of the thread curve is small, the moving speed of the screw nut 101 along the axial direction of the screw 100 is far less than the linear velocity component of the rotational speed of the screw 100 at the edge of the screw 100, and the speed conversion efficiency of the ball screw mechanism is low; the rack and pinion mechanism, as shown in fig. 2, fig. 2 is a schematic structural diagram of the rack and pinion mechanism in the prior art, wherein the rotation of the gear 200 can be converted into linear motion of the rack 201, the rack 201 is an external gear changing the reference circle into a straight line, and the rack 201 is of a gear structure, and has the advantages of stable transmission, high efficiency, long service life and the like, and has wide application in industry. However, the tooth-shaped structure is limited by various parameters, so that the machining precision and cost required by the tooth-shaped structure are high; in addition, the cam link mechanism has a short linear motion stroke, and when the power source performs uniform rotation motion, the linear motion of the output end is variable-speed motion, so that the cam link mechanism can only be used in some special occasions, and has a narrow application range.
Therefore, how to provide a linear motion output device, which has the advantages of simple structure, convenient manufacture, higher transmission efficiency and wide application range, is an important technical problem to be solved by the technicians in the field.
Disclosure of Invention
In view of this, the invention provides a linear motion output device, so as to achieve the purposes of simple structure, convenient manufacture, higher transmission efficiency and wide application range.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a linear motion output device comprising:
the driving mechanism is rotatable and is provided with a plurality of driving pieces which are uniformly distributed along the circumferential direction of the driving mechanism;
the sliding block can slide linearly, and a plurality of baffles are uniformly distributed on the sliding block along the sliding direction;
the driving piece is used for being in interference fit with the baffle along with the rotation of the driving mechanism and sliding from the first end of the baffle to the second end of the baffle so as to push the sliding block to slide along a straight line, and before one driving piece leaves the second end of the baffle contacted with the driving piece, the other driving piece adjacent to the driving piece is in interference fit with the first end of the other baffle on the sliding block.
Preferably, the driving mechanism is a driving disc, and the driving piece is arranged on one end face of the driving disc, or the driving piece is arranged on the circumferential side wall of the driving disc.
Preferably, the driving member includes a mounting shaft disposed on a side surface of the driving mechanism and having an axis parallel to the axis of the driving mechanism, and a driving roller rotatably fitted over the mounting shaft.
Preferably, the outer wall of the driving roller is coated with a buffer pad.
Preferably, the baffle is an arc baffle.
Preferably, the first end of the shutter is located forward of the second end of the shutter in the advancing direction of the slider.
Preferably, the end face of the first end of the baffle is an arc face.
Preferably, the shape function formula of the baffle is:
wherein R is the distance from the axis of the mounting shaft to the axis of the driving disc, ω is the angular velocity of the driving disc, t is the rotation time of the driving disc, X is the coordinate value of each point on the baffle-shaped curved surface on the X axis, and Y is the coordinate value of each point on the baffle-shaped curved surface on the Y axis.
According to the technical scheme, the linear motion output device comprises a driving mechanism and a sliding block, wherein the driving mechanism is of a rotatable structure, and a plurality of driving pieces which are uniformly distributed along the circumferential direction of the driving mechanism are arranged on the driving mechanism; the sliding block can slide along a straight line, and a plurality of baffles are uniformly distributed on the sliding block along the sliding direction; the driving piece is in interference fit with the baffle along with the rotation of the driving mechanism and slides from the first end of the baffle to the second end of the baffle so as to push the sliding block to slide along a straight line, and before one driving piece leaves the second end of the baffle contacted with the driving piece, the other driving piece adjacent to the driving piece is in interference fit with the first end of the other baffle on the sliding block; therefore, the linear motion output device has the advantages of simple structure, convenience in manufacturing and installation, low production cost and capability of continuously outputting unidirectional linear motion.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a ball screw mechanism according to the prior art;
FIG. 2 is a schematic diagram of a prior art rack and pinion mechanism;
fig. 3 is a schematic structural diagram of a linear motion output device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a driving mechanism in a linear motion output device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a slider in a linear motion output device according to an embodiment of the present invention.
Detailed Description
The invention provides a linear motion output device, which has the advantages of simple structure, convenient manufacture, higher transmission efficiency and wide application range.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a linear motion output device according to an embodiment of the invention.
The invention provides a linear motion output device which comprises a driving mechanism 1 and a sliding block 4.
The driving mechanism 1 is of a rotatable structure, and a plurality of driving pieces which are uniformly distributed along the circumferential direction of the driving mechanism 1 are arranged on the driving mechanism 1; the sliding block 4 can slide along a straight line, and a plurality of baffles 5 are uniformly distributed on the sliding block 4 along the sliding direction; the driving members are used for abutting against the baffle plate 5 along with the rotation of the driving mechanism 1 and sliding from the first end of the baffle plate 5 to the second end of the baffle plate 5 so as to push the sliding block 4 to slide along a straight line, and before one driving member leaves the second end of the baffle plate 5 contacted with the driving member, the other driving member adjacent to the driving member abuts against the first end of the other baffle plate 5 on the sliding block 4.
Compared with the prior art, when the linear motion output device is used, the torque output device, such as the output end of the motor, is connected with the driving mechanism 1, so that the driving mechanism 1 drives the driving piece to rotate, when the driving piece rotates to be in contact with the baffle plate 5 on the sliding block 4, the sliding block 4 is pushed to move along a straight line, and when the driving piece is about to be separated from the baffle plate 5 from the second end of the baffle plate 5, the other driving piece adjacent to the driving piece is in interference fit with the first end of the other baffle plate 5 on the sliding block 4 to ensure the continuity of motion, therefore, the linear motion output device is simple in structure, convenient to manufacture and install, low in production cost and capable of continuously outputting unidirectional linear motion.
The driving mechanism 1 is used for connecting the driving member with the output end of the torque output device, and may have various structures, for example, the driving mechanism 1 may be a bracket, and the bracket includes a connecting portion located in the center and a plurality of support rods uniformly distributed on the circumferential side wall of the connecting portion, and other structures may be used in addition, as shown in fig. 3, the driving mechanism 1 is a driving disc, and the driving member is disposed on an end face of the driving disc, or the driving member is disposed on the circumferential side wall of the driving disc. The shape of the driving disk may be circular, square or other polygonal shape, and is not limited again.
In the embodiment of the invention, referring to fig. 4, fig. 4 is a schematic structural diagram of a driving mechanism in a linear motion output device provided by the embodiment of the invention, the driving member comprises a mounting shaft 2 and a driving roller 3, the mounting shaft 2 is arranged on one side surface of the driving mechanism 1, the axis of the mounting shaft 2 is parallel to the axis of the driving mechanism 1, the driving roller 3 is rotatably sleeved on the mounting shaft 2, sliding friction between the driving member and the baffle 5 can be avoided through the driving roller 3, damage to the driving roller 3 and the baffle 5 is avoided through rolling friction, the service lives of the driving roller 3 and the baffle 5 are prolonged, and meanwhile noise can be reduced.
Further optimizing the above technical solution, in the embodiment of the present invention, the outer wall of the driving roller 3 is covered with a cushion pad. The buffer pad can play a role in buffering and noise reduction in the running process of the linear motion output device, so that collision damage between the driving roller 3 and the baffle plate 5 is prevented, and noise is further reduced.
The driving member is driven by the driving disk to perform uniform circular motion, although the value of the linear velocity of the driving member does not change, the angular moment of the driving member changes, so that in the running process, the velocity components of the driving member in the X-axis direction and the Y-axis direction also change at the moment, in fig. 3, the sliding direction of the sliding block 4, that is, the length direction of the driving member is the Y-axis direction, and the diameter direction perpendicular to the Y-axis direction on the driving disk is the X-axis direction, so that in order to enable the linear motion output device to output uniform linear motion, the shape of the baffle plate 5 needs to be adjusted, and the velocity components of the driving member in the X-axis direction and the Y-axis direction, which change at the moment, are converted into the linear uniform motion of the sliding block 4, and because the driving member itself performs circular motion, it is known that the baffle plate 5 should also be an arc baffle plate, so that the velocity components of the driving roller 3 in the Y-axis direction can push the arc baffle plate to move along the Y-axis direction, and the velocity components of the driving roller 3 in the X-axis direction can be offset by the shape of the arc baffle plate.
As can be seen from an examination of fig. 3, when the driving roller 3 is in contact with the shutter 5, the line connecting the driving roller 3 and the axis of the driving disk is exactly perpendicular to the Y axis, at this time, the velocity component of the driving roller 3 in the Y axis is the largest, which is equal to the linear velocity of the circumferential motion of the driving roller 3, the velocity component of the driving roller 3 in the X axis is the smallest, which is equal to 0, and the velocity component of the driving roller 3 in the Y axis gradually decreases and the velocity component of the driving roller in the X axis gradually increases as the driving disk rotates, and therefore, according to this feature, the shutter 5 is adjusted so that the first end of the shutter 5 is located in front of the second end of the shutter 5 in the advancing direction of the slider 4, that is, when the velocity component of the driving roller 3 in the Y axis is the largest, the slope change of the shutter 5 is gentle, and with the gradual decrease of the velocity component of the driving roller 3 in the Y axis, the slope change of the shutter 5 gradually increases, and by the above structure, it is possible to cancel the velocity loss of the circumferential motion of the driving roller 3 in the Y axis and keep the linear motion.
Further optimizing the above technical solution, the shape of the baffle 5 is critical to whether the slide block 4 can realize uniform linear motion, and the embodiment of the invention provides a shape function formula of the baffle 5, which is:
wherein R is the distance from the axis of the mounting shaft 2 to the axis of the driving disk, ω is the angular velocity of the driving disk, t is the rotation time of the driving disk, X is the coordinate value of each point on the curved surface of the shape of the baffle 5 on the X axis, and Y is the coordinate value of each point on the curved surface of the shape of the baffle 5 on the Y axis.
The derivation of the formula is as follows:
the driving disk rotates at constant speed with angular velocity omega, a point A/B is taken from the centers of two adjacent driving rollers 3, and referring to FIG. 4, the distance between A/B and the axis of the driving disk is R, the displacement X of the point A in the X-axis direction A Displacement Y in Y-axis direction =r-Rcos ωt A =rsinωt; displacement X of point B in X-axis direction B Displacement yb= -Rcos ωt in Y-axis direction. Deriving the displacement function from time t to obtain the velocity component of the A/B point: velocity component V of point A in X-axis direction AX Velocity component V in Y-axis direction =rωsin ωt AY R ωcos ωt; velocity component V of point B in X-axis direction BX Velocity component V in Y-axis direction =rωcos ωt BY R ωsin ωt. Because the shape design of the circular arc baffle is based on counteracting the velocity loss of the circular motion of the driving roller 3 in the y-axis directionThen the speed of the slider 4 is rω. The point of contact with the driving roller 3 is respectively taken from two adjacent circular arc baffles of the sliding block 4, and is designated as a '/B', referring to fig. 5, fig. 5 is a schematic structural diagram of the sliding block in the linear motion output device provided by the embodiment of the present invention, and then the motion track of a '/B' is the shape of the circular arc baffles. Taking the point B 'as an example, in the transmission process, the velocity component of B' in the X-axis direction is the motion component V of B in the X-axis direction B’X Velocity component V in Y-axis direction =rωcos ωt B’Y The displacement function X of B' is obtained by integrating the time t for the velocity function of B =rωsin ωt-rω B’ ＝Rsinωt，Y B’ = -Rcos ωt-rcot. And obtaining the shape function of the circular arc baffle.
Further optimize above-mentioned technical scheme, in order to avoid driving roller 3 and baffle 5 to collide in-process that contacts the cooperation, lead to driving roller 3 or baffle 5 to damage, in the embodiment of the invention, the terminal surface of the first end of baffle 5 is the cambered surface.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A linear motion output device, comprising:
the device comprises a rotatable driving mechanism (1), wherein a plurality of driving pieces which are uniformly distributed along the circumferential direction of the driving mechanism (1) are arranged on the driving mechanism (1), and the driving mechanism (1) is a driving disc;
the sliding block (4) can slide linearly, and a plurality of baffles (5) are uniformly distributed on the sliding block (4) along the sliding direction;
the driving piece is used for being in interference fit with the baffle plate (5) along with the rotation of the driving mechanism (1) and sliding from the first end of the baffle plate (5) to the second end of the baffle plate (5) so as to push the sliding block (4) to slide along a straight line, and before one driving piece leaves the second end of the baffle plate (5) contacted with the driving piece, the other driving piece adjacent to the driving piece is in interference fit with the first end of the other baffle plate (5) on the sliding block (4);
the driving piece comprises a mounting shaft (2) and a driving roller (3), the mounting shaft (2) is arranged on one side surface of the driving mechanism (1), the axis of the mounting shaft (2) is parallel to the axis of the driving mechanism (1), and the driving roller (3) is rotatably sleeved on the mounting shaft (2); the baffle (5) is an arc-shaped baffle, the first end of the baffle (5) is positioned in front of the second end of the baffle (5) in the advancing direction of the sliding block (4), the sliding direction of the sliding block (4) is the Y-axis direction, the diameter direction perpendicular to the Y-axis direction on the driving disc is the X-axis direction, along the direction from the first end to the second end of the baffle (5), along with the gradual reduction of the speed component of the driving roller (3) on the Y-axis, the slope change of the baffle (5) gradually increases, and the sliding block (4) keeps uniform linear motion.
2. The linear motion output device according to claim 1, characterized in that the outer wall of the drive roller (3) is covered with a cushion.
3. The linear motion output device according to claim 1, characterized in that the end face of the first end of the baffle (5) is a cambered surface.
4. Linear motion output device according to claim 1, characterized in that the shape function formula of the baffle (5) is:
wherein R is the distance from the axis of the mounting shaft (2) to the axis of the driving disc, ω is the angular velocity of the driving disc, t is the rotation time of the driving disc, X is the coordinate value of each point on the curved surface of the shape of the baffle (5) on the X axis, and Y is the coordinate value of each point on the curved surface of the shape of the baffle (5) on the Y axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017694.3A CN108286596B (en) | 2017-01-10 | 2017-01-10 | Linear motion output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710017694.3A CN108286596B (en) | 2017-01-10 | 2017-01-10 | Linear motion output device |
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| CN108286596A CN108286596A (en) | 2018-07-17 |
| CN108286596B true CN108286596B (en) | 2023-12-01 |
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| CN201710017694.3A Active CN108286596B (en) | 2017-01-10 | 2017-01-10 | Linear motion output device |
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| FR2367956A1 (en) * | 1976-10-14 | 1978-05-12 | Giraudo Georges | Transmission system with oscillating output shaft - has slotted levers to change magnitude of output oscillation with constant input speed |
| GB1567633A (en) * | 1975-10-14 | 1980-05-21 | Brems John Henry | Mechanisms |
| CN1111734A (en) * | 1993-11-12 | 1995-11-15 | 株式会社三桥制作所 | Cam apparatus |
| WO2006063509A1 (en) * | 2004-12-14 | 2006-06-22 | Haier Group Corporation | A driving mechanism for the air inlet and outlet baffle of an air conditioner |
| CN103075477A (en) * | 2012-12-28 | 2013-05-01 | 方裕华 | Pin wheel track driving device |
| CN203031127U (en) * | 2012-12-27 | 2013-07-03 | 中科中涵激光设备（福建）股份有限公司 | Laser processing rotary moving structure based on guide slider structure |
| CN105428696A (en) * | 2015-11-16 | 2016-03-23 | 深圳市倍特力电池有限公司 | Automatic edge-folding machine |
| CN105666480A (en) * | 2016-02-26 | 2016-06-15 | 东莞市速美达自动化有限公司 | Linear sliding block type rotary robot |
| CN205415748U (en) * | 2016-03-24 | 2016-08-03 | 张以周 | Chop machine of mixing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9573681B2 (en) * | 2014-02-14 | 2017-02-21 | Michael J. C. Smith | Wing-drive mechanism with unidirectional drive |
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2017
- 2017-01-10 CN CN201710017694.3A patent/CN108286596B/en active Active
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| GB1567633A (en) * | 1975-10-14 | 1980-05-21 | Brems John Henry | Mechanisms |
| FR2367956A1 (en) * | 1976-10-14 | 1978-05-12 | Giraudo Georges | Transmission system with oscillating output shaft - has slotted levers to change magnitude of output oscillation with constant input speed |
| CN1111734A (en) * | 1993-11-12 | 1995-11-15 | 株式会社三桥制作所 | Cam apparatus |
| WO2006063509A1 (en) * | 2004-12-14 | 2006-06-22 | Haier Group Corporation | A driving mechanism for the air inlet and outlet baffle of an air conditioner |
| CN203031127U (en) * | 2012-12-27 | 2013-07-03 | 中科中涵激光设备（福建）股份有限公司 | Laser processing rotary moving structure based on guide slider structure |
| CN103075477A (en) * | 2012-12-28 | 2013-05-01 | 方裕华 | Pin wheel track driving device |
| CN105428696A (en) * | 2015-11-16 | 2016-03-23 | 深圳市倍特力电池有限公司 | Automatic edge-folding machine |
| CN105666480A (en) * | 2016-02-26 | 2016-06-15 | 东莞市速美达自动化有限公司 | Linear sliding block type rotary robot |
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