CN107630998B - Variable-pitch elastic polished rod transmission device - Google Patents
Variable-pitch elastic polished rod transmission device Download PDFInfo
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- CN107630998B CN107630998B CN201711039242.1A CN201711039242A CN107630998B CN 107630998 B CN107630998 B CN 107630998B CN 201711039242 A CN201711039242 A CN 201711039242A CN 107630998 B CN107630998 B CN 107630998B
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Abstract
A variable-pitch elastic feed rod transmission device comprises a sliding block, 3 balance wheel modules and an optical axis, wherein the balance wheel modules and the optical axis are both positioned on the sliding block, one balance wheel is positioned on the upper side of the axial direction of the optical axis, the other two balance wheels are positioned on the lower side of the axial direction of the optical axis, and the rotation axis of the balance wheels and the axial line of the optical axis are finely adjusted through a wheel carrier angle adjusting wheel to form an equivalent thread lead angle; each balance wheel module comprises a contact wheel supporting frame, a contact wheel shaft and a wheel frame, wherein the contact wheel is in contact with the optical axis and rotates around the contact wheel shaft; the wheel carrier is fixedly connected with a wheel carrier shaft, the wheel carrier shaft penetrates through the through hole of the sliding block and then is connected with the wheel carrier angle adjusting wheel and the locking nut, the wheel carrier angle adjusting wheel is connected with the wheel carrier shaft, and the locking nut is in threaded connection with the end of the wheel carrier shaft; the wheel frame shaft is in clearance fit with the through hole of the sliding block or is connected through a bearing.
Description
Technical Field
The invention belongs to the field of transmission devices, and particularly relates to a variable-pitch elastic polished rod transmission device.
Background
In the technical field of mechanical engineering, a screw-nut pair has wide application as a commonly used linear motion mechanism, and the screw-nut pair is often matched with a rotating motor to realize conversion from rotary motion to linear motion. The screw-nut pair generally has a trapezoidal screw-nut pair, a standard screw-nut pair, a ball screw-nut pair, and the like. The trapezoidal screw nut pair can transmit larger torque and is generally used on heavy machinery; the standard screw nut pair can realize micro-feeding by adjusting the screw pitch in a 60-degree tooth form angle matching mode; the ball screw nut pair is formed by adding balls between the screw and the nut, and is characterized in that the friction torque is small, and the idle-stroke-free movement can be realized through pre-tightening. The minimum pitch of a standard screw-nut pair cannot be achieved by the pitch of a ball screw-nut pair limited by the minimum diameter of the ball.
Although the lead screw nut pairs are different in form, the common point of the lead screw nut pairs is that the thread pitch of the selected lead screw nut pair is fixed, namely that the conversion from one rotation of the lead screw to the linear displacement is fixed. For the application occasions with wide speed range, the indexes of the rotating motor such as the highest rotating speed, the moment and the like have higher requirements. And when the stroke of the screw nut pair is longer, the high-speed rotation motion generates a rod vibration effect, and the motion transmission function is seriously influenced.
In the transmission aspect of the light bar, a plurality of bearings forming a certain angle with the light bar are combined into a rotation-linear conversion mechanism, and the structure realizes the transmission of motion by means of the friction force between the bearings and the light bar. However, the method is to fix the equivalent pitch and has no pitch adjustment function.
Disclosure of Invention
The invention aims to provide a variable-pitch elastic polished rod transmission mechanism which is used for replacing a screw-nut pair transmission mechanism. The mechanism can overcome the defects that the single-turn feeding amount of the traditional screw nut pair is not adjustable, the shape error of the screw and the lateral force generated by self-weight deformation cause the reduction of the guiding precision of the guiding component. The mechanism can adjust the equivalent screw pitch in real time, and realize the real-time conversion of micro feeding and macro feeding. And an elastic energy absorption mechanism is added, so that the influence of a transmission mechanism on the guiding precision of the guiding mechanism is reduced.
The technical scheme of the invention is as follows: a variable-pitch elastic feed rod transmission device comprises a sliding block, 3 balance wheel modules and an optical axis, wherein the balance wheel modules and the optical axis are both positioned on the sliding block, one balance wheel is positioned on the upper side of the axial direction of the optical axis, the other two balance wheels are positioned on the lower side of the axial direction of the optical axis, and the rotation axis of the balance wheels and the axial line of the optical axis are finely adjusted through a wheel carrier angle adjusting wheel to form an equivalent thread lead angle; each balance wheel module comprises a contact wheel supporting frame, a contact wheel shaft and a wheel frame, wherein the contact wheel is in contact with the optical axis and rotates around the contact wheel shaft;
the wheel carrier is fixedly connected with a wheel carrier shaft, the wheel carrier shaft penetrates through the through hole of the sliding block and then is connected with the wheel carrier angle adjusting wheel and the locking nut, the wheel carrier angle adjusting wheel is connected with the wheel carrier shaft, and the locking nut is in threaded connection with the end of the wheel carrier shaft; the wheel frame shaft is in clearance fit with the through hole of the sliding block or is connected through a bearing; the contact wheel supporting frame is connected with the wheel frame through a contact wheel shaft, the contact wheel shaft is in interference fit with the wheel frame, and the contact wheel shaft is connected with the contact wheel supporting frame through a bearing; one side of the contact wheel supporting frame is connected with the wheel frame through a contact force adjusting spring and a contact force adjusting jackscrew, and the contact force of the balance wheel module and the optical axis can be adjusted through adjusting the contact force adjusting jackscrew; the contact wheel is connected with the contact wheel supporting frame through a wheel shaft; the driving wheel is in contact connection with the wheel carrier angle adjusting wheel; the driving wheel is connected with the sliding block; when the driving wheel rotates, the angle adjusting wheel of the wheel frame is driven to rotate together, and the balance wheel module generates angular deflection.
The wheel frame is fixedly connected with the wheel frame shaft through threads.
The connection mode of the wheel frame angle adjusting wheel and the wheel frame shaft is in key connection.
The wheel frame shaft is in clearance fit with the through hole of the sliding block.
The wheel shaft is in interference fit with the contact wheel support frame.
The driving wheel is in frictional contact with the wheel carrier angle adjusting wheel.
The driving wheel is connected with the sliding block through a sliding or rolling matching shaft.
When the rotation axes of the three balance wheel modules are parallel to the rotation axis of the optical axis, the rotation of the optical axis does not cause the transverse displacement of the sliding block; when the rotation axes of the three balance wheel modules form included angles with the rotation axis of the optical axis, the rotation of the optical axis generates transverse friction force on the balance wheel modules, and then the sliding block is driven to generate transverse displacement; when the optical axis rotation speed is fixed, the transverse displacement speed of the sliding block is determined by the included angle between the rotation axis of the three balance wheel modules and the rotation axis of the optical axis, the larger the included angle is, the larger the transverse displacement speed is, and on the contrary, the smaller the transverse displacement speed is.
The invention has the following remarkable effects: according to the technical scheme, the variable-pitch elastic polished rod transmission mechanism is actually manufactured, the diameter of the contact wheel is 20mm, the diameter of the polished rod shaft is 36mm, the driving wheel can be driven by the rotating motor to adjust a small angle, the equivalent pitch can cover the adjustment range of (0.1-12 mm) through actual measurement, and both micro-feeding and quick feeding can be realized. When the diameter of the optical axis is 36mm, the thread pitch of the common screw nut pair cannot reach 0.1 mm. The variable-pitch elastic polished rod transmission mechanism is applied to an air floatation guide system, the influence of the variable-pitch elastic polished rod transmission mechanism on the guide precision of the air floatation guide system is less than 0.5 mu m, and the variable-pitch elastic polished rod transmission mechanism has a good application effect.
Drawings
FIG. 1 is a front view of the variable pitch elastic optical lever transmission of the present invention
FIG. 2 is a side view of the variable pitch flexible optical rod drive of the present invention
FIG. 3 is a rear view of the variable pitch flexible optical lever actuator of the present invention
In the figure: 1-a slide block; 2-balance wheel module; 3-optical axis; 4-locking the nut; 5-a wheel carrier shaft; 6-wheel shaft; 7-wheel carrier angle adjusting wheel; 8-driving wheel; 9-a contact force adjusting spring; 10-adjusting the contact force of the jackscrew; 11-contact wheel support; 12-a contact wheel; 13-contact axle; 14-wheel frame.
Detailed Description
The pitch-variable elastic feed rod transmission device comprises a sliding block 1, balance wheel modules 2 and an optical axis 3, wherein the balance wheel modules 2 and the optical axis 3 are both positioned on the sliding block 1, the number of the balance wheel modules 2 is 3, one balance wheel is positioned on the upper side of the axial direction of the optical axis 3, the other two balance wheels are positioned on the lower side of the axial direction of the optical axis 3, and the rotation axes of the 3 balance wheels and the axial line of the optical axis 3 are finely adjusted through a wheel carrier angle adjusting wheel 7 to form an equivalent thread lead angle; each balance wheel module comprises a contact wheel support frame 11, a contact wheel 12, a contact wheel shaft 13 and a wheel frame 14, wherein the contact wheel 12 is in contact with the optical axis 3 and can rotate around the contact wheel shaft 13,
the wheel carrier 14 is fixedly connected with the wheel carrier shaft 5 through threads, the wheel carrier shaft 5 penetrates through the through hole of the sliding block 1 and then is connected with the wheel carrier angle adjusting wheel 7 and the locking nut 4, the wheel carrier angle adjusting wheel 7 is in key connection but not limited to key connection with the wheel carrier shaft 5, and the locking nut 4 is in threaded connection with the shaft end of the wheel carrier shaft 5; the wheel frame shaft 5 is in clearance fit with the through hole of the sliding block 1 or is connected through a bearing; the contact wheel supporting frame 11 is connected with the wheel frame 14 through the contact wheel shaft 13, the contact wheel shaft 13 is in interference fit with the wheel frame 14, and the contact wheel shaft 13 is in clearance fit with the contact wheel supporting frame 11 or is connected through a bearing; one side of the contact wheel supporting frame 11 is connected with the wheel frame 14 through the contact force adjusting spring 9 and the contact force adjusting jackscrew 10, the contact force of the balance wheel module 2 and the optical axis 3 can be adjusted through adjusting the contact force adjusting jackscrew 10, and meanwhile, the contact force adjusting spring 9 has a geometric error eliminating function when the optical axis 3 has a shape error or self-weight deformation, so that the influence of the geometric error eliminating function on the guiding precision of the guiding mechanism is reduced. The contact wheel 12 is connected with the contact wheel support frame 11 through the wheel shaft 6, the wheel shaft 6 is in interference fit with the contact wheel support frame 11, and is in clearance fit with the contact wheel 12 or is connected through a bearing. The driving wheel 8 and the wheel carrier angle adjusting wheel 7 are in contact connection, and may be in friction contact connection, but not limited to gear connection. The driving wheel 8 is connected with the sliding block 1 through a sliding or rolling matching shaft. When the driving wheel 8 rotates, the wheel carrier angle adjusting wheel 7 is driven to rotate together, so that the balance wheel module 2 generates angle deflection, and the purpose of adjusting the equivalent pitch is achieved. The rotary motion of the driving wheel 8 can be generated manually or driven by an additional rotary motor.
When the axes of rotation of the three balance modules 2 are parallel to the axis of rotation of optical axis 3, the rotation of optical axis 3 does not cause a lateral displacement of slide 1. When the rotation axes of the three balance wheel modules 2 and the rotation axis of the optical axis 3 form included angles, the rotation of the optical axis 3 generates transverse friction force on the balance wheel modules 2, and then the sliding block 1 is driven to generate transverse displacement. When the rotation speed of optical axis 3 is fixed, the lateral displacement speed of slider 1 is determined by the included angle between the rotation axis of three balance wheel modules 2 and the rotation axis of optical axis 3, and the larger the included angle is, the larger the lateral displacement speed is, otherwise, the smaller the lateral displacement speed is.
Claims (8)
1. The utility model provides a variable pitch elasticity polished rod transmission which characterized in that: the balance wheel mechanism comprises a sliding block (1), balance wheel modules (2) and an optical axis (3), wherein the balance wheel modules (2) and the optical axis (3) are both positioned on the sliding block (1), the number of the balance wheel modules (2) is 3, one balance wheel is positioned on the upper side of the optical axis (3) in the axial direction, the other two balance wheels are positioned on the lower side of the optical axis (3) in the axial direction, and the rotation axes of the 3 balance wheels and the axis of the optical axis (3) are finely adjusted through a wheel carrier angle adjusting wheel (7) to form an equivalent thread lead angle; each balance wheel module comprises a contact wheel support frame (11), a contact wheel (12), a contact wheel shaft (13) and a wheel frame (14), wherein the contact wheel (12) is in contact with the optical axis (3) and rotates around the contact wheel shaft (13);
the wheel carrier (14) is fixedly connected with the wheel carrier shaft (5), the wheel carrier shaft (5) penetrates through the through hole of the sliding block (1) and then is connected with the wheel carrier angle adjusting wheel (7) and the locking nut (4), the wheel carrier angle adjusting wheel (7) is connected with the wheel carrier shaft (5), and the locking nut (4) is in threaded connection with the shaft end of the wheel carrier shaft (5); the wheel frame shaft (5) is in clearance fit with the through hole of the sliding block (1) or is connected through a bearing; the contact wheel supporting frame (11) is connected with the wheel frame (14) through a contact wheel shaft (13), the contact wheel shaft (13) and the wheel frame (14) are in interference fit, and the contact wheel shaft (13) is connected with the contact wheel supporting frame (11) through a bearing; one side of the contact wheel supporting frame (11) is connected with the wheel frame (14) through a contact force adjusting spring (9) and a contact force adjusting jackscrew (10), and the contact force of the balance wheel module (2) and the optical axis (3) can be adjusted through adjusting the contact force adjusting jackscrew (10); the contact wheel (12) is connected with the contact wheel support frame (11) through a wheel shaft (6); the driving wheel (8) is in contact connection with the wheel carrier angle adjusting wheel (7); the driving wheel (8) is connected with the sliding block (1); when the driving wheel (8) rotates, the wheel frame angle adjusting wheel (7) is driven to rotate together, and the balance wheel module (2) generates angle deflection.
2. The variable pitch elastic optical lever actuator of claim 1, wherein: the wheel frame (14) is fixedly connected with the wheel frame shaft (5) through threads.
3. The variable pitch elastic optical lever actuator of claim 1, wherein: the connection mode of the wheel frame angle adjusting wheel (7) and the wheel frame shaft (5) is a key connection.
4. The variable pitch elastic optical lever actuator of claim 1, wherein: the wheel frame shaft (5) is in clearance fit with the through hole of the sliding block (1).
5. The variable pitch elastic optical lever actuator of claim 1, wherein: the wheel shaft (6) is in interference fit with the contact wheel support frame (11).
6. The variable pitch elastic optical lever actuator of claim 1, wherein: the driving wheel (8) is in frictional contact with the wheel carrier angle adjusting wheel (7).
7. The variable pitch elastic optical lever actuator of claim 1, wherein: the driving wheel (8) is connected with the sliding block (1) through a sliding or rolling matching shaft.
8. The variable pitch elastic optical lever actuator of claim 1, wherein: when the rotation axes of the three balance wheel modules (2) are parallel to the rotation axis of the optical axis (3), the rotation of the optical axis (3) does not cause the transverse displacement of the sliding block (1); when the rotation axes of the three balance wheel modules (2) form included angles with the rotation axis of the optical axis (3), the optical axis (3) rotates to generate transverse friction force on the balance wheel modules (2), and then the sliding block (1) is driven to generate transverse displacement; when the rotation speed of the optical axis (3) is fixed, the transverse displacement speed of the sliding block (1) is determined by the included angle between the rotation axis of the three balance wheel modules (2) and the rotation axis of the optical axis (3), the larger the included angle is, the larger the transverse displacement speed is, and conversely, the smaller the transverse displacement speed is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711039242.1A CN107630998B (en) | 2017-10-31 | 2017-10-31 | Variable-pitch elastic polished rod transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711039242.1A CN107630998B (en) | 2017-10-31 | 2017-10-31 | Variable-pitch elastic polished rod transmission device |
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| Publication Number | Publication Date |
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| CN107630998A CN107630998A (en) | 2018-01-26 |
| CN107630998B true CN107630998B (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711039242.1A Active CN107630998B (en) | 2017-10-31 | 2017-10-31 | Variable-pitch elastic polished rod transmission device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843759A (en) * | 2018-09-11 | 2018-11-20 | 李桂君 | A kind of Eccentrically rocking type reduction gear |
| CN111473097A (en) * | 2020-04-02 | 2020-07-31 | 铜陵帆捷智能测控科技有限责任公司 | High-efficiency external rolling type large-lead polished rod toothless nut |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB447424A (en) * | 1935-11-11 | 1936-05-19 | Ronald Maitland Austin Rice | Improvements in or relating to variable pitch airscrews |
| CN1079514C (en) * | 1998-04-24 | 2002-02-20 | 南京经济学院 | Variable pitch high speed feeding screw and its manufacture |
| CN2436718Y (en) * | 2000-08-22 | 2001-06-27 | 石家庄钢铁有限责任公司 | Screw stroke controller |
| CN101973084B (en) * | 2010-11-22 | 2012-08-15 | 湖南宇晶机器实业有限公司 | Automatic winding device with swinging mechanism for multi-wire cutting machine |
| CN201940262U (en) * | 2010-12-20 | 2011-08-24 | 田建中 | Roller fine adjusting structure for mini-mills |
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