CN108331894B - Linear motion mechanism with adjustable stroke and slope and control method thereof - Google Patents
Linear motion mechanism with adjustable stroke and slope and control method thereof Download PDFInfo
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- CN108331894B CN108331894B CN201810280784.6A CN201810280784A CN108331894B CN 108331894 B CN108331894 B CN 108331894B CN 201810280784 A CN201810280784 A CN 201810280784A CN 108331894 B CN108331894 B CN 108331894B
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- 125000006850 spacer group Chemical group 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 4
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- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
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Abstract
A linear motion mechanism with adjustable stroke and slope and a control method thereof belong to the technical field of motion mechanisms and consist of a linear motion mechanism and an adjusting mechanism together; the linear motion mechanism consists of a motion output connecting rod, a motion crank shaft, a motion external gear, an internal gear external worm wheel, a motion sliding block, a motion connecting rod and a linear motion motor; the adjusting mechanism consists of a motion stroke adjusting worm, an inner gear outer worm wheel, a motion outer gear, a stroke adjusting hand wheel, a worm left flange, a worm right flange and a stroke adjusting motor; the utility model has novel structure, clear and feasible control method, the initial position forming the reciprocating linear motion can be adjusted according to actual needs, and the mechanism has no lateral component force in the operation process, so that the sliding block does not have lateral friction resistance motion in the plane pair, and the service life and the stability of the kinematic pair are improved; although the manufacturing cost is increased, the application range is wide, and the cost performance is enhanced.
Description
Technical Field
The utility model belongs to the technical field of motion mechanisms, relates to a linear motion mechanism and a control method thereof, and particularly relates to a linear motion mechanism with adjustable stroke and slope and a control method thereof.
Background
The mechanism is a system of components with defined mechanical movements that can be used to transfer and translate the movements. The linear motion mechanism is a mechanism which enables a certain point on the component to perform accurate or approximate linear motion, so that the linear motion mechanism can be divided into an accurate linear motion mechanism and an approximate linear motion mechanism; the precise linear mechanism can replace the guide groove and the slide bar, and the friction loss is much smaller than that of the guide groove and the slide bar because the only loss source in the movement process is the rotation friction at the hinge joint and the friction length is very short. Classical precise linear motion mechanisms are Bose Li Ye-Lipujin linear motion mechanism and Saruss linear motion mechanism. Although the approximately linear motion mechanism can replace the sliding rod and the guide groove, in application, one section is required to be a straight line, and the other section is required to be a curve. Classical approximately linear motion mechanisms are the watt approximately linear motion mechanism and the Huo Ken linear motion mechanism.
The linear motion mechanism has the following characteristics: (1) The device has the advantages of simple structure, easy manufacture, reliable work, longer transmission distance, larger transmission load, realization of a quick return motion rule, low transmission efficiency, unstable transmission and larger impact and vibration, and can not easily obtain uniform motion or other random motion rules; (2) The rotation and the linear movement can be realized, the transmission is stable and noiseless, and the transmission and the linear movement are interchanged; the sliding screw can be made into a self-locking screw mechanism; the working speed is generally low, and the device is only suitable for low-power transmission; (3) The requirements on manufacturing and installation precision are high, the transmission noise is large when the precision is low, and no overload protection function is achieved; the helical gear mechanism moves stably and has strong bearing capacity, but axial force can be generated in transmission, and a thrust bearing or an angular contact bearing is required to be arranged when the helical gear mechanism is used; (4) The distance between shafts is larger, the working is stable and noise-free, the vibration absorption can be buffered, and the friction belt transmission has overload protection effect; the structure is simple, the installation requirement is not high, and the outline size is larger; the friction belt transmission has elastic sliding and cannot be used for an indexing system; friction is easy to electrify, and is not suitable for flammable and explosive occasions; the stress of the shaft and the bearing is larger, and the service life of the transmission belt is shorter; (5) The axial distance is larger, the average transmission ratio is constant, an oil film formed between chain elements has vibration absorbing capacity, strong adaptability to severe environments, reliable work and smaller on-shaft load; the instantaneous running speed is not uniform, and the belt is not stable at high speed; when the chain works, resonance is easy to occur after the chain is worn and stretched, and a tensioning and damping device is generally needed to be additionally arranged.
Common mechanisms for the mutual conversion between the rotary motion and the linear motion in practical machines are a crank-slider mechanism, a cam mechanism, a rack-and-pinion mechanism and a ball screw mechanism, respectively.
In a common four-bar mechanism, four components are connected through a revolute pair to realize conversion between curve and curve motion, and a crank sliding block mechanism reserves a crank rod, a middle rod and a fixed rod (a rack), degenerates the other rod into a sliding block, enables the sliding block to be connected with the middle connecting rod through the revolute pair, and enables the sliding block to be connected with the fixed rod through a movable pair, so that the mutual conversion between the rotary motion of a crank end and the linear motion of a sliding block end is realized. Slider-crank mechanisms are widely used in machines, for example, internal combustion engines that convert internal energy into mechanical energy for cranking by reciprocating pistons; the structure of the press machine realizes the pressurizing effect by continuously rotating the crank and driving the sliding block through the connecting rod; in the main motion mechanism of the squaring machine, a guide rod swings around a point to drive a ram to reciprocate, so that the planning is realized; in the structure of the water pump, when the handle is rocked, the piston rod moves up and down in the cylinder (fixed slide block) under the support of the connecting rod, so as to achieve the purpose of pumping water. In addition, crank block mechanisms are used in machines such as thread rolling machines, automatic feeding devices, self-unloading tipping bucket devices and the like in engineering. The crank block mechanism has the advantages of low secondary connection, small single-unit area stress of the kinematic pair, convenient lubrication and small abrasion; control over long distances is also possible; the movement between the components is maintained by a geometrical closure, which is more reliable than a force closure. However, the crank slider mechanism has a complex structural design and high sensitivity to manufacturing and installation; high speeds will cause significant vibration and dynamic loads.
The cam mechanism consists of a cam, a follower and a frame, wherein the cam is a driving piece, and the motion rule of the follower is determined by the contour of the cam. The cam is a member having a curved profile or groove, and if the follower is a moving member, such a cam mechanism can effect a conversion of rotary motion to linear motion. The valve mechanism of the internal combustion engine is a typical example of the application of a cam mechanism, and the cam mechanism can be used for occasions requiring any motion rule of a driven member; the device can be started at a high speed, the action is accurate and reliable, and the structure is simple and compact; the cam and the follower are in point or line contact, the pressure per unit area is high, good lubrication is difficult to keep, and the cam is easy to wear; however, the cam has a complex shape and is difficult to process and maintain.
The gear-rack transmission is a transmission form which is widely used, can realize the conversion between the rotary motion of a gear and the linear motion of a rack, has a plurality of advantages, particularly on a plurality of large-scale machine tools, can conveniently obtain high-speed linear motion by utilizing the transmission form, and can manufacture racks of various materials according to different aspects of the machine tools, so that the rigidity and the mechanical efficiency are greatly improved. However, the stability of the transmission form depends on the precision of racks and gears, and if the precision is not high enough, the machine tool has a certain error when machining other parts. Therefore, if it is desired to eliminate the errors of such parts or to reduce the running noise in a machine tool, the accuracy requirements for racks and gears are continuously increased, and the wear resistance and heat resistance are increased in terms of materials.
The patent number CN01240083.1 discloses a non-crankshaft long-stroke piston internal combustion engine, wherein a transmission shaft head hole output device is used for replacing a crankshaft, the swing angle of the crankshaft is not limited, and the stroke of a cylinder and a piston of the non-crankshaft long-stroke piston internal combustion engine can be reasonably lengthened at will according to the thermal efficiency requirement; the utility model of patent number CN1520373237.4 proposes a gear box capable of converting linear motion into rotary motion, which adopts the principle of rack and gear transmission to realize the conversion of linear motion and rotary motion; the patent number CN201510149575.4 discloses a linear motion device in a combined mode, which consists of a side plate, a linear guide rail, a motor, a coupler, a fixed end bearing seat, a support end bearing seat, a nut, a ball screw and a sliding table, and realizes the conversion of rotary motion and linear motion; the patent number CN201410280856.9 discloses a reciprocating linear motion and circular motion conversion device, wherein a transmission chain is adopted to realize motion conversion around a fixed rotating shaft, and the accuracy of the motion has defects; the patent number CN99202004.2 discloses a round internal rotation line reciprocating linear motion device with a variable stroke, which is realized by fixing a fixed ring internal gear on a base, arranging a movable ring external gear on a crankshaft of a T-shaped shaft cross arm in a shaft hole of a bearing seat, arranging a driving wheel on the T-shaped shaft cross arm, symmetrically with the movable ring external gear, movably arranging an adjustable crank on a spoke of the movable ring gear for movable displacement, arranging a square sliding hanging plate on a middle cutting sleeve of a sliding guide rail, and driving a working rod to do reciprocating linear motion. It can be seen from the prior utility model patent and the prior utility model patent that the conversion mechanism for realizing the rotary motion and the linear motion has different paths, but is realized by the cooperation of a certain kinematic pair. A combined mechanism of gear transmission and a crank connecting rod mechanism does not exist to realize a motion mechanism which converts rotary motion into linear motion and has controllable stroke.
Disclosure of Invention
Aiming at the defects that the conventional linear motion mechanism can realize the rapid back motion rule, but cannot obtain the uniform motion rule, the transmission is unstable, the impact and vibration are large, the working stroke cannot be finely adjusted according to the requirements, and the like, the utility model provides the linear motion mechanism with adjustable stroke and slope and the control method thereof, which can effectively solve the defects in the prior art and can further meet the use requirements of the linear motion mechanism in special occasions.
The technical scheme of the utility model is as follows: the linear motion mechanism with adjustable stroke and slope comprises a left shell and a right shell, wherein the left shell and the right shell are connected through an inner hexagonal flower-shaped cylindrical head screw; the method is characterized in that: the linear motion mechanism with adjustable stroke and slope is also composed of a linear motion mechanism and an adjusting mechanism;
the linear motion mechanism consists of a motion output connecting rod, a motion crank shaft, a motion external gear, an internal gear external worm wheel, a motion sliding block, a motion connecting rod and a linear motion motor; the inner gear outer worm wheel is connected and arranged in the right shell through an angular contact ball bearing, the motion crankshaft is arranged at the center of the inner gear outer worm wheel through the angular contact ball bearing, the input end of the motion crankshaft is in driving connection with the output shaft of the linear motion motor, the motion outer gear is arranged at the output end of the motion crankshaft, the motion crank is arranged at the center of the motion outer gear, the motion output connecting rod is arranged at the bottom of the motion crank, one end of the motion connecting rod is connected with the motion output connecting rod, and the other end of the motion connecting rod is connected with the motion sliding block;
the adjusting mechanism consists of a motion stroke adjusting worm, an internal gear outer worm wheel, a motion external gear, a stroke adjusting hand wheel, a worm left flange, a worm right flange and a stroke adjusting motor; the motion stroke adjusting worm is in transmission connection with the worm wheel outside the internal gear, the left side of the stroke adjusting worm is connected and arranged on the shell through an angular contact ball bearing, the left flange of the worm is arranged on the outer side of the angular contact ball bearing through a countersunk head screw, the stroke adjusting hand wheel is arranged at the left end part of the motion stroke adjusting worm and is limited and fixed through a big cylindrical head screw, the right side of the motion stroke adjusting worm is connected and arranged on the shell through the angular contact ball bearing, the right flange of the worm is arranged on the outer side of the angular contact ball bearing through a countersunk head screw, and the output shaft of the stroke adjusting motor is connected with the right end part of the motion stroke adjusting worm.
And a centripetal needle roller and a retainer component are arranged between the motion output connecting rod and the motion crank, so that the motion output connecting rod rotates circumferentially relative to the motion crank, and the motion output connecting rod is axially limited and fixed with the motion crank through a slotted spherical large cylindrical head screw.
The motion crank is arranged in the center of the motion external gear and is fixedly connected with the motion crankshaft through a hexagon head fluted bolt, a flat washer and a light spring washer.
The center of the axle distance of the motion crank is equal to the pitch circle radius of the motion external gear.
The angular contact ball bearings, the angular contact ball bearings and the angular contact ball bearings are used in a paired structure, bearing spacer rings are arranged between every two angular contact ball bearings, a spring retainer ring for a shaft is arranged on an outer worm wheel shaft of an internal gear where the angular contact ball bearings are located, and a spring retainer ring for a hole is arranged on the hole wall of an outer worm wheel of the internal gear where the angular contact ball bearings are located.
The pitch circle diameter of the external moving gear is equal to the pitch circle radius of the worm wheel outside the internal gear.
The control method of the linear motion mechanism with adjustable stroke and slope is characterized by comprising the following control steps:
(1) The stroke adjusting hand wheels or the stroke adjusting motors arranged at the two ends of the movement stroke adjusting worm are adjusted, so that the movement stroke adjusting worm drives the outer worm wheel of the inner gear to rotate by a certain angle, the angle is kept unchanged, and self-locking is realized;
(2) The initial position of the outer worm wheel of the inner gear is changed, so that the initial meshing point of the outer worm wheel of the inner gear is changed, the motion track of any point on the pitch circle of the outer moving gear is changed, the slope is adjusted by the inclination of the straight line of the diameter reciprocating straight line motion of the outer worm wheel of the inner gear relative to the horizontal position, and the reciprocating straight line motion of the moving slide block and the adjustment of the position of the moving slide block are adjusted.
(3) By installing a motion crank with the same length as the pitch circle radius of the external motion gear at the output end of the motion crank, a certain point on the pitch circle of the external motion gear is virtually moved, the tooth strength of the external motion gear is ensured, and the aim that the motion trail of the certain point on the pitch circle of the external motion gear moves linearly along the horizontal diameter direction of the worm wheel outside the internal gear is fulfilled.
(4) The moving slide block has no lateral component force in the running process of the mechanism, so that the moving slide block does not move in the plane pair with lateral friction resistance, and the service life and stability of the moving pair are improved.
The beneficial effects of the utility model are as follows: the linear motion mechanism with adjustable stroke and slope provided by the utility model has novel structure, and a control method is clear and feasible, adopts the principle that the motion track of any point on the section circle of the external gear of the motion is a straight line which reciprocates through the diameter of the external worm wheel of the internal gear of the motion, and simultaneously adopts a part structure with the adjustable stroke slope and the internal gear of the motion as a whole, so that the initial position for forming the reciprocating linear motion can be adjusted according to actual needs, and the linear motion stroke of the sliding block is controlled and adjusted through the connecting rod. The mechanism has more parts relative to the crank slide mechanism, but the linear motion stroke of the slide block of the crank slide mechanism is fixed, and the mechanism can be adjusted manually or under control according to the requirement; meanwhile, the mechanism has no lateral component force in the operation process, so that the sliding block does not move in the plane pair with lateral friction resistance, and the service life and stability of the kinematic pair are improved; although the manufacturing cost is increased, the application range is wide, and the cost performance is enhanced.
Drawings
FIG. 1 is a schematic diagram of the overall side view of the present utility model.
Fig. 2 is a schematic diagram of the overall front view structure of the present utility model.
In the figure: the large cylindrical head screw 1 of the slotted sphere, the centripetal needle and retainer assembly 2, the motion output connecting rod 3, the motion crank 4, the hexagonal head slotted bolt 5, the plain washer 6, the light spring washer 7, the motion crank 8, the large washer 9, the first angular contact ball bearing 10, the bearing spacer 11, the motion external gear 12, the long spacer 13 of the bearing, the internal gear external worm wheel 14, the motion stroke adjusting worm 15, the left shell 16, the inner hexagonal cylindrical head screw 17, the plain washer 18, the light spring washer 19, the right shell 20, the second angular contact ball bearing 21, the bearing spacer 22, the inner hexagonal cylindrical head screw 23, the plain washer 24, the light spring washer 25, the spring washer for shaft 26, the spring washer for hole 27, the third angular contact ball bearing 28, the linear motion motor 29, the large cylindrical head screw 30, the stroke adjusting hand wheel 31, the worm left flange 32, the countersunk head screw 33, the fourth angular contact ball bearing 34, the stroke adjusting motor 35, the motion slide 36, the motion connecting rod 37, and the worm right flange 38.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1-2, a linear motion mechanism with adjustable stroke and slope comprises a left shell 16 and a right shell 20, and also comprises a linear motion mechanism and an adjusting mechanism.
As shown in fig. 1 to 2, a linear motion mechanism with adjustable stroke and slope is composed of a motion output connecting rod 3, a motion crank 4, a motion crank shaft 8, a motion external gear 12, an internal gear external worm wheel 14, a motion sliding block 36, a motion connecting rod 37 and a linear motion motor 29; the inner gear outer worm wheel 14 is connected and arranged in the right shell 20 through a second angular contact ball bearing 21, the motion crankshaft 8 is arranged at the center of the inner gear outer worm wheel 14 through a first angular contact ball bearing 10, the input end of the motion crankshaft 8 is in driving connection with the output shaft of the linear motion motor 29, the motion outer gear 12 is arranged at the output end of the motion crankshaft 8, the motion crank 4 is arranged at the center of the motion outer gear 12, the motion output connecting rod 3 is arranged at the bottom of the motion crank 4, one end of the motion connecting rod 37 is connected with the motion output connecting rod 3, and the other end is connected with the motion sliding block 36;
as shown in fig. 1 to 2, a linear motion mechanism with adjustable stroke and slope is composed of a motion stroke adjusting worm 15, an internal gear outer worm wheel 14, a motion outer gear 12, a stroke adjusting hand wheel 31, a worm left flange 32, a worm right flange 38 and a stroke adjusting motor 35; the motion stroke adjusting worm 15 is in transmission connection with the internal gear outer worm wheel 14, the left side of the motion stroke adjusting worm 15 is connected and arranged on the shell through a fourth angle contact ball bearing 34, a worm left flange 32 is arranged on the outer side of the angle contact ball bearing 34 through a countersunk head screw 33, a stroke adjusting hand wheel 31 is arranged at the left end part of the motion stroke adjusting worm 15 and is limited and fixed through a big cylindrical head screw 30, the right side of the motion stroke adjusting worm 15 is connected and arranged on the shell through the fourth angle contact ball bearing 34, a worm right flange 38 is arranged on the outer side of the fourth angle contact ball bearing 34 through a countersunk head screw 33, and an output shaft of a stroke adjusting motor 35 is connected with the right end part of the motion stroke adjusting worm 15.
As shown in fig. 1-2, in the linear motion mechanism with adjustable stroke and slope, a centripetal rolling needle and a retainer assembly 2 are arranged between a motion output connecting rod 3 and a motion crank 4, so that the motion output connecting rod 3 rotates circumferentially relative to the motion crank 4, and the motion output connecting rod 3 and the motion crank 4 form axial limiting fixation through a slotted spherical big cylindrical head screw 1; the motion crank 4 is arranged in the center of the motion external gear 12 and is fixedly connected with the motion crankshaft 8 through a hexagon head fluted bolt 5, a flat washer 6 and a light spring washer 7; the center distance of the motion crank 4 is equal to the pitch circle radius of the motion external gear 12; the first angular contact ball bearing 10, the second angular contact ball bearing 21, the third angular contact ball bearing 28 and the fourth angular contact ball bearing 34 are all used in a paired structure, bearing spacers are arranged between every two angular contact ball bearings, a shaft spring retainer ring 26 is arranged on an outer worm wheel shaft of an inner gear where the second angular contact ball bearing 21 is positioned, and a hole spring retainer ring 27 is arranged on the hole wall of an outer worm wheel of the inner gear where the third angular contact ball bearing 28 is positioned; the pitch diameter of the external motion gear 12 is equal to the pitch radius of the external gear worm wheel 14.
As shown in fig. 1-2, in a linear motion mechanism with adjustable stroke and slope, since a cylindrical pin is installed on the node of the external motion gear 12, it is difficult to drive the motion output connecting rod 3 to drive the motion sliding block 36 to do reciprocating linear motion, in order to ensure the strength of gear teeth and transmit certain torque, a large-modulus gear must be selected as an internal gear and an external gear, and thus the volume of the motion conversion mechanism is huge. For this purpose, a crank 4 is fixedly connected by means of splines (or square structures) by means of the left shaft end extension of the crank shaft 8, the axial distance of the crank 4 being equal to the pitch circle radius of the external gear 12. I.e. virtually making a pitch circle radius, realizing the function of transmitting motion and torque.
As shown in fig. 1-2, a control method of a linear motion mechanism with adjustable stroke and slope comprises the following control steps:
(1) The stroke adjusting worm 15 drives the inner gear outer worm wheel 14 to rotate by a certain angle by adjusting the stroke adjusting handwheels 31 or the stroke adjusting motors 35 arranged at the two ends of the movement stroke adjusting worm 15, and the angle is kept unchanged and self-locking is realized;
(2) By changing the initial position of the inner gear outer worm wheel 14, the initial meshing point of the moving outer gear 12 with the inner gear outer worm wheel 14 is changed, so that the movement track of any point on the pitch circle of the moving outer gear 12 is changed, and the inclination of the straight line of the diameter reciprocating straight line movement of the inner gear outer worm wheel 14 relative to the horizontal position is adjusted to adjust the reciprocating straight line movement of the moving slide block 36 and the position thereof.
(3) By installing the motion crank 4 with the same length as the pitch radius of the external motion gear 12 at the output end of the motion crank 8, a certain point on the pitch circle of the external motion gear 12 is virtually calculated, the tooth strength of the external motion gear 12 is ensured, and the purpose that the motion trail of the certain point on the pitch circle of the external motion gear 12 moves linearly along the horizontal diameter direction of the external worm gear 14 of the internal gear is realized.
(4) The moving slide block 36 has no lateral component force in the running process of the mechanism, so that the moving slide block does not move in the plane pair with lateral friction resistance, and the service life and the stability of the moving pair are improved.
Examples
The parameters of the linear motion mechanism with adjustable stroke and slope are as follows:
(1) In order to ensure the high strength, rigidity, high meshing quality and small volume of the gear transmission mechanism, the structural parameters of the gear transmission are selected as follows: modular 2, internal gear number 50, external gear number 25.
(2) Slope actuating mechanism for changing linear motion travel: the worm gear number is 60, the modulus is 2, the worm head number is 1, and the manual or automatic adjustment is carried out; after the adjustment is finished, the worm and gear mechanism is in a self-locking state.
(3) Slope adjustment range: 0-90 deg.
(4) In order to ensure that the crank-connecting rod mechanism has enough rigidity and strength on the premise of light mechanism, the most suitable length of the connecting rod, crank radius and structural parameters are selected as follows: the length of the connecting rod is 180mm, the radius of the crank is 25mm, and the structural parameters are 0.2778.
(5) The virtual crank length is 25mm.
(6) Maximum and minimum travel of the sliding block after the slope adjusting mechanism is adjusted: 0-50 mm.
Claims (7)
1. The linear motion mechanism with adjustable stroke and slope comprises a left shell (16) and a right shell (20), wherein the left shell (16) and the right shell (20) are connected through an inner hexagonal flower-shaped cylindrical head screw (17); the method is characterized in that: the linear motion mechanism with adjustable stroke and slope is also composed of a linear motion mechanism and an adjusting mechanism;
the linear motion mechanism consists of a motion output connecting rod (3), a motion crank (4), a motion crank shaft (8), a motion external gear (12), an internal gear external worm wheel (14), a motion sliding block (36), a motion connecting rod (37) and a linear motion motor (29); the inner gear outer worm wheel (14) is connected and arranged in the right shell (20) through a second angular contact ball bearing (21), the motion crankshaft (8) is arranged at the center of the inner gear outer worm wheel (14) through a first angular contact ball bearing (10), the input end of the motion crankshaft (8) and the output shaft of the linear motion motor (29) form driving connection, the motion outer gear (12) is arranged at the output end of the motion crankshaft (8), the motion crank (4) is arranged at the center of the motion outer gear (12), the motion output connecting rod (3) is arranged at the bottom of the motion crank (4), one end of the motion connecting rod (37) is connected with the motion output connecting rod (3), and the other end of the motion connecting rod is connected with the motion sliding block (36);
the adjusting mechanism consists of a motion stroke adjusting worm (15), an internal gear outer worm wheel (14), a motion outer gear (12), a stroke adjusting hand wheel (31), a worm left flange (32), a worm right flange (38) and a stroke adjusting motor (35); the motion stroke adjusting worm (15) is in transmission connection with the inner gear outer worm wheel (14), the left side of the motion stroke adjusting worm (15) is connected and arranged on the shell through a fourth corner contact ball bearing (34), a worm left flange (32) is arranged on the outer side of the fourth corner contact ball bearing (34) through a countersunk head screw (33), a stroke adjusting hand wheel (31) is arranged at the left end part of the motion stroke adjusting worm (15) and is limited and fixed through a large cylindrical head screw (30), the right side of the motion stroke adjusting worm (15) is connected and arranged on the shell through the fourth corner contact ball bearing (34), a worm right flange (38) is arranged on the outer side of the fourth corner contact ball bearing (34) through a countersunk head screw (33), and an output shaft of a stroke adjusting motor (35) is connected with the right end part of the motion stroke adjusting worm (15).
2. A linear motion mechanism with adjustable stroke and slope as claimed in claim 1 wherein: and a centripetal needle roller and a retainer component (2) are arranged between the motion output connecting rod (3) and the motion crank (4), so that the motion output connecting rod (3) rotates circumferentially relative to the motion crank (4), and the motion output connecting rod (3) is axially limited and fixed with the motion crank (4) through a slotted spherical big cylindrical head screw (1).
3. A linear motion mechanism with adjustable stroke and slope as claimed in claim 1 wherein: the motion crank (4) is arranged in the center of the motion external gear (12) and is fixedly connected with the motion crankshaft (8) through a hexagon head fluted bolt (5), a flat washer (6) and a light spring washer (7).
4. A linear motion mechanism with adjustable stroke and slope as claimed in claim 1 wherein: the axle center distance of the motion crank (4) is equal to the pitch circle radius of the motion external gear (12).
5. A linear motion mechanism with adjustable stroke and slope as claimed in claim 1 wherein: the first angular contact ball bearing (10), the second angular contact ball bearing (21), the third angular contact ball bearing (28) and the fourth angular contact ball bearing (34) are used in a paired structure, bearing spacers are arranged between every two angular contact ball bearings, a spring retainer ring (26) for a shaft is arranged on an outer worm wheel shaft of an inner gear where the second angular contact ball bearing (21) is located, and a spring retainer ring (27) for a hole is arranged on the hole wall of an outer worm wheel of the inner gear where the third angular contact ball bearing (28) is located.
6. A linear motion mechanism with adjustable stroke and slope as claimed in claim 1 wherein: the pitch circle diameter of the external moving gear (12) is equal to the pitch circle radius of the external worm gear (14).
7. A control method of a linear motion mechanism with both stroke and slope being adjustable, characterized by using the linear motion mechanism with both stroke and slope being adjustable according to any one of claims 1 to 6, comprising the following control steps:
(1) The stroke adjusting worm (15) drives the internal gear outer worm wheel (14) to rotate by a certain angle through adjusting the stroke adjusting handwheels (31) or the stroke adjusting motors (35) arranged at the two ends of the movement stroke adjusting worm (15), and the angle is kept unchanged and self-locking is realized;
(2) The initial position of the external worm wheel (14) of the internal gear is changed, so that the initial meshing point of the external moving gear (12) with the external worm wheel (14) of the internal gear is changed, the movement track of any point on the pitch circle of the external moving gear (12) is changed, the inclination is adjusted by the inclination of the straight line of the diameter reciprocating straight line movement of the external worm wheel (14) of the internal gear relative to the horizontal position, and the reciprocating straight line movement of the moving slide block (36) and the adjustment of the position thereof are adjusted;
(3) The motion crank (4) with the same length as the pitch circle radius of the external motion gear (12) is arranged at the output end of the motion crank shaft (8), a certain point on the pitch circle of the external motion gear (12) is virtually moved, the tooth strength of the external motion gear (12) is ensured, and the aim that the motion trail of the certain point on the pitch circle of the external motion gear (12) moves linearly along the horizontal diameter direction of the external worm gear (14) of the internal gear is fulfilled;
(4) The moving slide block (36) has no lateral component force in the running process of the mechanism, so that the moving slide block does not move in the plane pair with lateral friction resistance, and the service life and the stability of the moving pair are improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280784.6A CN108331894B (en) | 2018-04-02 | 2018-04-02 | Linear motion mechanism with adjustable stroke and slope and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN108331894B true CN108331894B (en) | 2023-12-22 |
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| CN113580008A (en) * | 2021-08-20 | 2021-11-02 | 上海新钐机床有限公司 | Reciprocating motion device and grinding wheel frame comprising same |
| CN113911042A (en) * | 2021-10-11 | 2022-01-11 | 深圳市亚加电机有限公司 | Mobile device for camera and lifting motor mechanism |
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| CN102182811A (en) * | 2011-03-27 | 2011-09-14 | 欧阳富 | Beyond gear shifting implement |
| CN102677185A (en) * | 2012-06-04 | 2012-09-19 | 浙江理工大学 | Integral swing type one-order denaturation eccentric circular gear-two-order conjugate non-circular gear traverse mechanism of silk reeling machine |
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| CN106594220A (en) * | 2016-12-22 | 2017-04-26 | 武汉理工大学 | Stroke-adjustable type intermittent movable mechanical device based on non-circular gear divider |
| EP3293418A1 (en) * | 2015-02-10 | 2018-03-14 | Hangzhou Deyu Precision Machinery Manufacturing Co., Ltd. | Back knocking mechanism and knocking method therefor |
| CN208138419U (en) * | 2018-04-02 | 2018-11-23 | 扬州工业职业技术学院 | A kind of stroke and the adjustable straight-line motion mechanism of slope |
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| CN1786501A (en) * | 2004-12-09 | 2006-06-14 | 财团法人工业技术研究所 | Structure of moving device using electromechanical to control clutch |
| CN102182811A (en) * | 2011-03-27 | 2011-09-14 | 欧阳富 | Beyond gear shifting implement |
| CN102677185A (en) * | 2012-06-04 | 2012-09-19 | 浙江理工大学 | Integral swing type one-order denaturation eccentric circular gear-two-order conjugate non-circular gear traverse mechanism of silk reeling machine |
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| CN108331894A (en) | 2018-07-27 |
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