CN112628369A - No return error sways motion structure - Google Patents
No return error sways motion structure Download PDFInfo
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- CN112628369A CN112628369A CN202011492735.2A CN202011492735A CN112628369A CN 112628369 A CN112628369 A CN 112628369A CN 202011492735 A CN202011492735 A CN 202011492735A CN 112628369 A CN112628369 A CN 112628369A
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- arc
- steel wire
- wire rope
- shaped block
- driving wheel
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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
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/08—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
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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
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/001—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion
- F16H19/003—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member
- F16H19/005—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for conveying reciprocating or limited rotary motion comprising a flexible member for conveying oscillating or limited rotary motion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys
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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
- F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
- F16H19/08—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion
- F16H2019/085—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and oscillating motion by using flexible members
Abstract
A swinging motion structure without return error mainly comprises a base, a support, a motor, a transmission wheel, a steel wire rope, an arc-shaped block, a pressing plate screw, a tension mechanism, a shaft system and a frame, and is a flexible speed reduction transmission system. The swinging motion structure without return error can realize reciprocating motion, can be used for any rotary table, when the motor receives a motion instruction signal, the motor rotates forwards and backwards, when the motor rotates forwards and backwards, two steel wire ropes are respectively wound and loosened on the driving wheel coaxial with the motor, so that the arc-shaped block is pulled to perform reciprocating linear motion, and the arc-shaped block fixedly connected with the frame enables the frame to perform forward and reverse rotation around a rotary shaft system and is converted into swinging motion of the frame. The invention does not occupy the axial space of a rotary table shaft system, has small volume, light weight and low cost, can freely set the transmission ratio for different rotary tables according to the requirement, and can realize zero return error of reciprocating motion, no vibration and no impact.
Description
Technical Field
The invention belongs to the field of swing experiment devices, relates to a swing motion structure, and particularly relates to a return error-free swing motion structure.
Background
The swing platform is a rotary table with a swing function, can provide space swing motion, and is mainly used for testing the dynamic performance and the dynamic precision of the instrument. During testing, the swing platform makes swing motion with specified parameters according to the instructions of the industrial personal computer. The existing swing table mainly has four transmission modes: the first is supported and driven by an electric cylinder; the second is that the driving motor is coaxially installed with the rotating shaft and is directly driven; the third is a crank connecting rod mechanism driven by a motor; the fourth is a gear pair or a gear rack transmission driven by a motor. The form supported and driven by the electric cylinder has high manufacturing cost, large power consumption and long production period; the swing motion rotary table with the driving motor and the rotating shaft coaxially arranged has the advantages that the torque motor used under the same motion index is large in size, and the table body is large in size; the crank connecting rod mechanism driven by the motor is in transmission with the gear pair or the gear rack, and due to inherent gaps among mechanical parts, the swinging motion has large impact, large noise and large return error.
Disclosure of Invention
The invention aims to overcome the defects and provides a swing motion structure without return stroke errors for a swing test, which has the advantages of simple structure, low power consumption, no return stroke errors, no impact, stable motion, small volume, convenience in processing and installation and suitability for single-shaft, double-shaft and three-shaft swing motion turntables.
In order to achieve the above purpose, the invention provides the following technical scheme:
a return-error-free rocking motion structure comprising: the device comprises a base, a frame, a rotary shaft system, a bracket, a motor, a transmission wheel, an arc-shaped block, a tension mechanism and a steel wire rope;
the rotary shaft system is arranged on the base, and the frame is fixedly arranged on the rotary shaft system;
the bracket is fixedly arranged on the base, and the motor is fixedly arranged on the bracket;
the driving wheel is fixedly arranged on an output shaft of the motor, and the motor drives the driving wheel to rotate;
the arc-shaped block is fixed at one end of the frame, the upper surface of the arc-shaped block is vertical to the axis X1 of the rotary shaft system, and the end surface of the arc-shaped block, which is far away from the axis X1 of the rotary shaft system, is arc-shaped; the arc-shaped block reciprocates to drive the frame to rotate around the rotating shaft system;
the tension mechanism is arranged on the upper surface of the arc-shaped block to realize the installation and pre-tightening of the steel wire rope;
the steel wire rope is connected with the arc-shaped block and the tension mechanism through the driving wheel, and the rotation of the driving wheel is converted into the reciprocating motion of the arc-shaped block. The positions of the steel wire rope, the arc-shaped block and the tension mechanism are respectively positioned at two sides of the upper surface of the arc-shaped block;
further, the frame is of a hollow structure.
Furthermore, the rotating shaft is an outer rotor structure and comprises a rotating shaft and a bearing seat, the rotating shaft is fixedly connected with the base, and the frame is fixedly connected with the bearing seat.
Further, the axis X2 of the motor is parallel to the axis X1 of the rotary shaft system of the turntable.
Further, the transmission wheel is a hollow cylinder, a spiral groove is formed in the outer cylindrical surface, two radial steel wire mounting holes are formed in the spiral groove, and a central angle corresponding to an arc line along the outer cylindrical surface of the transmission wheel (6) between the steel wire mounting holes is 25-30 degrees.
Furthermore, the tension mechanism comprises a fixed bracket, a floating bracket, a sliding block, a spring and an adjusting screw;
the fixed support is fixedly connected with the arc-shaped block;
the floating support, the sliding block and the spring are connected in series in the fixed support through the adjusting screw, the sliding block is fixed at one end of the spring and is tightly attached to the other end of the spring, and the adjusting screw is rotated to drive the sliding block to extrude or loosen the spring and drive the floating support to move along the axis direction of the adjusting screw;
the floating support is fixedly connected with the steel wire rope, and the floating support moves to control the steel wire rope to be tensioned.
Furthermore, when the device is pre-tightened, the gap between the sliding block and the floating support is controlled to be 3-5 mm through the adjusting screw.
Furthermore, two steel wire ropes are arranged, and the steel wire ropes penetrate through the two steel wire mounting holes of the driving wheel and are connected with the surface of the arc-shaped block and the tension mechanism after respectively winding the driving wheel for one circle;
the two steel wire ropes are opposite in direction around the driving wheel, and the two steel wire ropes are wound and loosened on the driving wheel respectively, so that the arc-shaped block is pulled to perform reciprocating linear motion.
Furthermore, the device also comprises a pressure plate and a pressure plate screw; the steel wire rope is respectively fixed on the arc-shaped block and the tension mechanism through the pressing plate and the pressing plate screw;
the pressure plate screw is divided into a threaded area and a non-threaded area, the non-threaded area is tightly close to the screw head, and the length of the non-threaded area is less than the diameter of the steel wire rope, the thickness of the pressure plate and the thickness of the arc-shaped block or the floating support; the pressing plate is sleeved on the pressing plate screw, the steel wire rope penetrates through the position between the pressing plate and the arc-shaped block or the floating support, and after the steel wire rope is bent oppositely around the pressing plate screw, the threaded area of the pressing plate screw is matched with the standard nut to compress the steel wire rope.
Furthermore, the non-thread area of the pressure plate screw is surrounded by two opposite cambered surfaces and two opposite planes, so that the rotary motion of the pressure plate screw in the through hole is limited; and straight knurls vertical to the direction of the steel wire rope are distributed on the plane where the pressing plate is in contact with the steel wire rope and used for increasing the friction force between the pressing plate and the steel wire rope.
Further, the radius of the arc-shaped end of the arc-shaped block is equal to the distance from the axis X1 of the rotating shaft system to the arc-shaped end.
Further, the radius of the driving wheel is equal to the distance from the axis X2 of the motor to the arc end of the arc-shaped block.
Further, the steel wire rope is a composite multi-strand stainless steel wire rope.
Furthermore, the cross section of a spiral groove arranged on the driving wheel is arc-shaped, the radius of the arc-shaped is 1.2-1.4 times of that of the steel wire rope, and the gap between the deepest part of the spiral groove and the arc-shaped end of the arc-shaped block is + 0.4-0.6 mm of the diameter of the steel wire rope.
Compared with the prior art, the invention has the following beneficial effects:
(1) the return error-free swing motion structure adopts a transmission structure mode of an arc-shaped block, a transmission wheel, a steel wire rope and a tension mechanism, the transmission mode reduces the influence of load inertia on a motor, reduces the driving power of the motor, reduces the volume of the rotary table under the same load condition by 1/3, and greatly improves the use performance of the rotary table;
(2) the invention adopts the steel wire rope as a transmission medium, eliminates transmission return stroke idle stroke and return stroke errors caused by mechanical transmission, and ensures that the swinging motion has the advantages of stability, high efficiency, low noise, high precision, long service life and the like.
(3) The invention adopts the structural form of the external rotor with the external driving system, thereby greatly reducing the rotational inertia of the swing table, reducing the volume of the mechanical table body, reducing the manufacturing cost and shortening the manufacturing period.
Drawings
FIG. 1 is a front view of a rocking motion mechanism without return stroke error according to the present invention;
FIG. 2 is a top view of the rocking motion mechanism without return error of the present invention;
FIG. 3 is a tension mechanism of the swing motion structure without return error of the present invention;
FIG. 4 is a structural diagram of the transmission structure of the non-return error rocking motion structure of the present invention;
FIG. 5 is a structural diagram of a driving wheel of the swing motion structure without return error according to the present invention;
FIG. 6 is a cross-sectional view of the spiral groove of the driving wheel with a swing motion structure without return stroke error according to the present invention;
fig. 7 is a structure diagram of a pressure plate screw of the rocking motion structure without return stroke error of the invention.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The technical scheme of the invention is as follows: a swinging motion structure without return error is a flexible speed-reducing transmission system, can realize reciprocating motion, can be used for any rotary table and mainly comprises a base, a support, a motor, a transmission wheel, a steel wire rope, an arc-shaped block, a pressing plate screw, a tension mechanism, a rotary shaft system and a frame. The steel wire rope is connected with the arc-shaped block and the tension mechanism through the transmission wheel, the arc-shaped block is connected with the frame, and the motor drives the transmission wheel to rotate so as to drive the frame to realize swinging motion.
The working principle of the invention is as follows: when the motor receives a motion instruction signal, the motor rotates forwards and reversely, and when the motor rotates forwards and reversely, the two steel wire ropes are wound and loosened on the driving wheel coaxial with the motor respectively, so that the arc-shaped block is pulled to perform reciprocating linear motion, and the arc-shaped block fixedly connected with the frame enables the frame to rotate forwards and reversely around the rotary shaft system and is converted into swinging motion of the frame.
As shown in fig. 1 and 2, the present invention provides a swing motion structure without return error, comprising: the device comprises a base 1, a frame 2, a rotary shaft system 3, a bracket 4, a motor 5, a driving wheel 6, an arc-shaped block 7, a tension mechanism 8 and a steel wire rope 9;
the rotary shaft system 3 is arranged on the base 1, and the frame 2 is fixedly arranged on the rotary shaft system 3; the rotary shaft system 3 is used for supporting the frame 2;
the bracket 4 is fixedly arranged on the base 1, the motor 5 is fixedly arranged on the bracket 4, and the bracket 4 is used for supporting and fixing the motor 5; a motor mounting flange is arranged on the support 4, the motor 5 is arranged on the support 4, and the axis is parallel to the axis X1 of the rotary shaft system 3 of the rotary table;
the transmission wheel 6 is fixedly arranged on an output shaft of the motor 5, and the motor 5 drives the transmission wheel 6 to rotate; the rotation axis of the driving wheel 6 is coaxial with the axis X2 of the motor 5;
the arc-shaped block 7 is fixed at one end of the frame 2, the upper surface of the arc-shaped block is vertical to the axis X1 of the rotary shaft system 3, and the end surface of the arc-shaped block, which is far away from the axis X1 of the rotary shaft system 3, is arc-shaped; the arc of the arc-shaped end of the arc-shaped block 7 is in a vertical plane of a common plane with the axis X1 of the rotary shaft system 3 and the axis X2 of the motor 5;
the reciprocating motion of the arc-shaped block 7 drives the frame 2 to rotate by taking the rotary shaft system 3 as a center;
as shown in fig. 4, the tension mechanism 8 is installed on one side of the upper surface of the arc block 7 to realize the installation and pre-tightening of the steel wire rope 9; the tension mechanism 8 is used as a steel wire rope 9 and fixed at the moving end of the arc-shaped block 7; the other end of the steel wire rope 9 is fixed on the other side of the upper surface of the arc-shaped block 7 to be used as a fixed end;
the steel wire rope 9 is connected with the surface of the arc-shaped block 7 and the tension mechanism 8 through the driving wheel 6, and the left-right rotation of the driving wheel 6 is converted into the reciprocating motion of the arc-shaped block 7. The specific process is as follows: when the motor 5 receives the motion instruction signal, the motor 5 rotates forward and reversely, and the motor 5 rotates forward and reversely, because the motor 5 is coaxial with the driving wheel 6, and two ends of two steel wire ropes 9 are respectively fixed on the driving wheel 6 and the arc-shaped block 7 or the tension mechanism 8, the two steel wire ropes 9 are respectively wound and loosened on the driving wheel 6, thereby pulling the arc-shaped block 7 to perform reciprocating linear motion. The arc-shaped blocks 7 fixedly connected with the frame 2 enable the frame 2 to rotate forwards and reversely around the axis X1 of the revolving shaft system 3, so that the swinging motion of the frame 2 is realized.
Further, the frame 2 is a hollow structure.
Further, the rotary shaft system 3 is an outer rotor structure and comprises a rotating shaft and a bearing seat, the rotating shaft is fixedly connected with the base 1, and the frame 2 is fixedly connected with the bearing seat. In the structure of the rotating shaft system 3, the shaft only plays a supporting role and does not participate in the movement of the frame 2. Therefore, the structure is small in rotational inertia, a group of flexible transmission consisting of the transmission wheel 6, the arc-shaped block 7 and the steel wire rope 9 is a speed reduction transmission structure, and the torque required by the motor 5 is related to the ratio of the motion radius R of the arc-shaped block 7 to the radius R of the transmission wheel 6.
Further, the axis X2 of the motor 5 is parallel to the axis X1 of the turntable rotating shaft system 3.
Furthermore, the driving wheel 6 is a hollow cylinder, the diameter of the inner hole of the cylinder is the same as the nominal size of the output shaft of the motor 5, an open slot is formed in the lower 1/3 part of the cylinder and provided with a screw, the driving wheel 6 is sleeved on the output shaft of the motor 5, and the screw is screwed tightly, so that the driving wheel 6 is fixedly connected with the output shaft of the motor 5. The outer cylindrical surface of the driving wheel 6 is provided with a spiral groove, the cylindrical surface of the driving wheel 6 is provided with two adjacent radial steel wire mounting holes, the two steel wire mounting holes are arranged in the same spiral groove, and the section of the spiral groove is semicircular. The central angle that corresponds along the pitch arc of the drive wheel 6 outer cylindrical surface between the steel wire mounting hole is 25 ~ 30, sees from the drive wheel cross-section direction promptly, and the contained angle between two steel wire mounting holes is 25 ~ 30.
Further, as shown in fig. 3, the tension mechanism 8 includes a fixed bracket 12, a floating bracket 13, a slider 14, a spring 15, and an adjusting screw 16;
the fixed bracket 12 is fixedly connected with the arc-shaped block 7;
the floating support 13, the sliding block 14 and the spring 15 are connected in series in the fixed support 12 through the adjusting screw 1, the sliding block 14 is fixed at one end of the spring 15, the floating support 13 is tightly attached to the other end of the spring 15, and the adjusting screw 16 is rotated to drive the sliding block 14 to extrude or loosen the spring 15, so that the floating support 13 is driven to move along the axis direction of the adjusting screw 16; the compression direction of the spring 15 in the tension mechanism 8 is perpendicular to the axis X2 of the motor 5.
The floating support 13 is fixedly connected with the steel wire rope 9, and the floating support 13 controls the steel wire rope 9 to be tensioned in a moving mode.
Furthermore, when the tension mechanism 8 is pre-tightened, the adjusting screw 16 is used for ensuring that the gap between the sliding block 14 and the floating support 13 is 3-5 mm.
Furthermore, two steel wire ropes 9 are provided, and the steel wire ropes 9 pass through two steel wire mounting holes of the driving wheel 6 and are respectively connected with the surface of the arc-shaped block 7 and the tension mechanism 8 after winding the driving wheel 6 for a circle; the positions of the steel wire rope 9, the arc block 7 and the tension mechanism 8 are respectively positioned at two sides of the upper surface of the arc block 7;
furthermore, the directions of the two steel wire ropes 9 around the driving wheel 6 are opposite, and the two steel wire ropes 9 are wound and loosened on the driving wheel 6 respectively, so that the arc-shaped block 7 is pulled to perform reciprocating linear motion. And the left-right rotation of the driving wheel 6 is converted into the reciprocating motion of the arc-shaped block 7. Two wire ropes 9 are fixed through two wire mounting holes of the driving wheel 6 respectively and penetrate out of the wire mounting holes of the driving wheel 6, a left edge and a right edge of a spiral groove of the driving wheel 6 are connected to the surface of the arc block 7 and the tension mechanism 8 after winding the driving wheel 6 for one circle, the tension mechanism 8 is located on one side of the upper surface of the arc block 7, and the positions of the wire ropes 9 and the upper surface of the arc block 7, which are fixed, are located on the other side of the upper surface of the arc block 7.
Furthermore, the swing motion structure without return error also comprises a pressure plate 10 and a pressure plate screw 11; in the structure, two sets of pressure plates 10 and pressure plate screws 11 are arranged, wherein one set is arranged on the tension mechanism 8, and the other set is arranged on the arc-shaped block 7 and used for fixing the steel wire rope 9.
The pressing plate 10 is a rectangular steel plate, the pressing plate screw 11 is divided into a threaded area and a non-threaded area, the non-threaded area is tightly close to the head of the screw, and the length of the non-threaded area is less than the diameter of the steel wire rope 9, the thickness of the pressing plate 10 and the thickness of the arc-shaped block 7 or the floating support 13; the tail end of the pressure plate screw 11 is externally threaded for mounting a standard nut, as shown in fig. 7.
The arc block 7 and the floating support 13 are provided with two through holes at the position for installing the pressure plate 10, the pitch of the through holes is the same as that of the holes on the pressure plate 10, the nominal size of the through holes is the same as the shape and size of the cylindrical cross section of the pressure plate screw 11, and the through holes are set to be in positive tolerance.
The way of fixing the steel wire rope 9 by the pressing plate 10 and the plate screw 11 is as follows: the pressing plate 10 is sleeved on the pressing plate screw 11, the steel wire rope 9 penetrates through the position between the pressing plate 10 and the arc-shaped block 7 or the floating support 13, and after the steel wire rope is bent oppositely around the pressing plate screw 11, the threaded area of the pressing plate screw 11 is matched with the standard nut to press the steel wire rope 9 tightly. Specifically, a pressing plate screw 11 is embedded into a through hole of an arc-shaped block 7 (or a floating support 13), then a pressing plate 10 and a standard nut are sequentially installed on the pressing plate screw 11, a steel wire rope 9 penetrates through the position between the pressing plate 10 and the arc-shaped block 7 (or the floating support 13), and after the steel wire rope is bent for 180 degrees around the two pressing plate screws 11, the standard nut on the pressing plate screw 11 is screwed, and the steel wire rope 9 is fixed below the pressing plate 10.
Furthermore, the non-threaded area of the pressure plate screw 11 is in the shape of a round hole cut edge, namely, the non-threaded area is surrounded by two opposite cambered surfaces and two opposite planes, so that the rotary motion of the pressure plate screw 11 in the through hole is limited; the through hole for installing the pressure plate screw 11 on the arc block 7 (or the floating support 13) is also in the shape of a round hole cut edge, so that the rotary motion of the pressure plate screw 11 around the axis of the pressure plate screw can be limited, and when the nut is screwed, only a solid wrench is needed, so that the structural space is saved, and the operation is simple. And straight knurls vertical to the trend of the steel wire rope 9 are distributed on the plane where the pressing plate 10 is in contact with the steel wire rope 9 and used for increasing the friction force between the pressing plate 10 and the steel wire rope 9.
Further, the radius of the arc-shaped end of the arc-shaped block 7 is equal to the distance from the axis X1 of the rotary shaft system 3 to the arc-shaped end.
Further, as shown in fig. 5, the radius of the driving wheel 6 is equal to the distance from the axis X2 of the motor 5 to the arc end of the arc block 7.
Further, the wire rope 9 is a composite multi-strand stainless wire rope.
Further, as shown in fig. 6, the cross section of the spiral groove formed in the driving wheel 6 is arc-shaped, the radius of the arc-shaped groove is 1.2-1.4 times of the radius of the steel wire rope 9, and the depth of the groove is set to ensure that the gap between the minimum diameter (namely the bottom diameter of the spiral groove and the deepest part of the spiral groove) of the spiral groove on the driving wheel 6 and the arc-shaped end of the arc-shaped block 7 is + 0.4-0.6 mm of the diameter of the steel wire rope 9.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (14)
1. A return-error-free rocking motion structure, comprising: the device comprises a base (1), a frame (2), a rotary shaft system (3), a bracket (4), a motor (5), a transmission wheel (6), an arc-shaped block (7), a tension mechanism (8) and a steel wire rope (9);
the rotary shaft system (3) is arranged on the base (1), and the frame (2) is fixedly arranged on the rotary shaft system (3);
the bracket (4) is fixedly arranged on the base (1), and the motor (5) is fixedly arranged on the bracket (4);
the transmission wheel (6) is fixedly arranged on an output shaft of the motor (5), and the motor (5) drives the transmission wheel (6) to rotate;
the arc-shaped block (7) is fixed at one end of the frame (2), the upper surface of the arc-shaped block is vertical to the axis X1 of the rotary shaft system (3), and the end surface of the arc-shaped block, which is far away from the axis X1 of the rotary shaft system (3), is arc-shaped; the arc-shaped block (7) reciprocates to drive the frame (2) to rotate by taking the rotary shaft system (3) as a center;
the tension mechanism (8) is arranged on the upper surface of the arc-shaped block (7) to realize the installation and pre-tightening of the steel wire rope (9);
the steel wire rope (9) is connected with the arc-shaped block (7) and the tension mechanism (8) through the driving wheel (6), and the rotation of the driving wheel (6) is converted into the reciprocating motion of the arc-shaped block (7).
2. The structure of swinging motion without return stroke error as claimed in claim 1, wherein the frame (2) is a hollow structure.
3. The structure of swinging motion without return stroke error as claimed in claim 1, wherein the rotary shaft system (3) is an outer rotor structure, and comprises a rotary shaft and a bearing seat, the rotary shaft is fixedly connected with the base (1), and the frame (2) is fixedly connected with the bearing seat.
4. The structure of swinging motion without return stroke error as claimed in claim 1, wherein the axis X2 of the motor (5) is parallel to the axis X1 of the turntable rotating shaft system (3).
5. The structure of swinging without return stroke error as claimed in claim 1, wherein the driving wheel (6) is a hollow cylinder, a spiral groove is arranged on the outer cylindrical surface, two radial steel wire mounting holes are arranged in the spiral groove, and the central angle corresponding to the arc line along the outer cylindrical surface of the driving wheel (6) between the steel wire mounting holes is 25-30 °.
6. The structure of swinging motion without return stroke error as claimed in claim 1, wherein the tension mechanism (8) comprises a fixed bracket (12), a floating bracket (13), a slide block (14), a spring (15) and an adjusting screw (16);
the fixed support (12) is fixedly connected with the arc-shaped block (7);
the floating support (13), the sliding block (14) and the spring (15) are connected in series in the fixed support (12) through an adjusting screw (16), the sliding block (14) is fixed at one end of the spring (15), the floating support (13) is tightly attached to the other end of the spring (15), the sliding block (14) is driven to extrude or loosen the spring (15) by rotating the adjusting screw (16), and the floating support (13) is driven to move along the axis direction of the adjusting screw (16);
the floating support (13) is fixedly connected with the steel wire rope (9), and the floating support (13) controls the steel wire rope (9) to be tensioned in a moving mode.
7. The structure of claim 6, wherein the gap between the sliding block (14) and the floating support (13) is controlled to be 3-5 mm by the adjusting screw (16) during pre-tightening.
8. The structure of swinging motion without return stroke error as claimed in claim 1, wherein there are two steel wire ropes (9), and the steel wire ropes (9) are connected with the arc-shaped block (7) and the tension mechanism (8) after passing through two steel wire mounting holes of the driving wheel (6) and respectively winding around the driving wheel (6); the positions of the steel wire rope (9) connected with the arc-shaped block (7) and the tension mechanism (8) are respectively positioned on two sides of the upper surface of the arc-shaped block (7);
the two steel wire ropes (9) are opposite in direction around the driving wheel (6), and the two steel wire ropes (9) are wound and loosened on the driving wheel (6) respectively, so that the arc-shaped block (7) is pulled to perform reciprocating linear motion.
9. The structure of swinging motion without return stroke error as claimed in claim 1, further comprising a pressure plate (10) and a pressure plate screw (11); the steel wire rope (9) is respectively fixed on the arc-shaped block (7) and the tension mechanism (8) through a pressure plate (10) and a pressure plate screw (11);
the clamp plate screw (11) is divided into a threaded area and a non-threaded area, the non-threaded area is tightly close to the screw head, and the length of the non-threaded area is less than the diameter of the steel wire rope (9), the thickness of the clamp plate (10), the thickness of the arc-shaped block (7) or the thickness of the floating support (13); the pressing plate (10) is sleeved on the pressing plate screw (11), the steel wire rope (9) penetrates through the position between the pressing plate (10) and the arc-shaped block (7) or the floating support (13), and after the steel wire rope is bent oppositely around the pressing plate screw (11), the threaded area of the pressing plate screw (11) is matched with the standard nut to compress the steel wire rope (9).
10. The structure of claim 9, wherein the non-threaded area of the pressure plate screw (11) is defined by two opposite curved surfaces and two opposite flat surfaces, and the rotation of the pressure plate screw (11) in the through hole is limited; straight knurls vertical to the direction of the steel wire rope (9) are distributed on the plane where the pressing plate (10) is in contact with the steel wire rope (9) and used for increasing the friction force between the pressing plate (10) and the steel wire rope (9).
11. The structure of swinging motion without return stroke error as claimed in claim 1, wherein the radius of the arc end of the arc block (7) is equal to the distance from the axis X1 of the rotation shafting (3) to the arc end.
12. A return error-free rocking motion structure as claimed in claim 1, wherein the radius of the driving wheel (6) is equal to the distance from the axis X2 of the motor (5) to the arc end of the arc block (7).
13. The structure of claim 1, wherein the wire rope (9) is a composite multi-strand stainless steel wire rope.
14. The structure of swinging motion without return stroke error as claimed in claim 5, wherein the cross section of the spiral groove of the driving wheel (6) is arc-shaped, the radius of the arc-shaped is 1.2-1.4 times of the radius of the steel wire rope (9), and the clearance between the deepest part of the spiral groove and the arc-shaped end of the arc-shaped block (7) is + 0.4-0.6 mm of the diameter of the steel wire rope (9).
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| CN202011492735.2A CN112628369A (en) | 2020-12-16 | 2020-12-16 | No return error sways motion structure |
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| CN101288941A (en) * | 2007-12-12 | 2008-10-22 | 哈尔滨工业大学 | Large angle activity guide plate swinging gear |
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