Synchronous movement device and compressor
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-04-03
Smart Images
Figure CN121782346A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of compressor technology, and more particularly to a synchronous motion device and a compressor. Background Technology
[0002] In the field of mechanical automation, especially in scenarios requiring multiple end effectors to achieve synchronized radial contraction or expansion movements, such as multi-jaw manipulators, variable-diameter grippers or molds, optical lens centering mechanisms, and precision alignment devices, achieving high-precision synchronous and concentric motion has always been a key technological challenge. Existing technical solutions mainly suffer from two types of representative defects: The first approach involves equipping each actuator mounting section with an independent drive unit (such as a servo motor, linear motor, or cylinder) and performing complex synchronous control through a host controller. While this approach theoretically enables flexible movement, it results in a large number of system components, complex wiring, and high overall cost. Furthermore, the mechanical errors, response delays, and slight asynchrony of control commands in each drive unit can accumulate, making it difficult to maintain strict radial movement of all actuator ends relative to an absolutely fixed center during dynamic processes; in other words, "concentricity" accuracy is difficult to guarantee.
[0003] The second type of solution employs traditional mechanical linkage mechanisms, such as sector gear linkages, synchronous belt pulley systems, or multi-cam systems. While these solutions reduce the number of drive sources, their structures are often inherently complex and bulky, with numerous kinematic pairs. Accumulated backlash can amplify transmission errors, making it difficult to achieve high rigidity and high precision motion transmission. More importantly, their kinematic design often struggles to ensure that the instantaneous motion directions of all output points precisely converge at a fixed center point, meaning that while achieving synchronous expansion and contraction, it is difficult to strictly guarantee concentricity. Therefore, existing technologies generally suffer from problems such as complex structures, high manufacturing costs, limited motion accuracy (especially concentricity), and a need to improve reliability and stability.
[0004] Therefore, there is an urgent need for a mechanical device that is simple in structure, low in cost, and can ensure high-precision synchronous concentric motion. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a synchronous motion device and compressor.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: On one hand, the present invention provides a synchronous motion device, comprising: The main frame is equipped with linear guide rails; A drive assembly includes a drive source and a guide wheel that is drively connected to the drive source, the guide wheel having multiple curved grooves. At least two driven components, each driven component including a guide that movably engages with each of the curved grooves, a slider connected to the guide, and an actuator mounting part connected to the slider; When the guide wheel rotates, it pushes each of the guide members through the curved groove, causing each of the sliders to move linearly along the linear guide rail under the drive of each of the guide members, thereby causing the actuator mounting part to move synchronously and concentrically along the radial direction of the guide wheel.
[0007] Furthermore, the outline of each of the curved grooves is an involute, and each involute has the same base circle and development angle.
[0008] Furthermore, the guide component is a rolling bearing, which is located within the curved groove and its outer ring is movably disposed relative to the side wall of the curved groove. The inner ring of the rolling bearing is connected to the slider via a connecting shaft.
[0009] Furthermore, the main frame includes a first fixing plate, which includes a central portion and guide portions extending radially in multiple directions along the central portion, the guide portions being provided with linear guide rails arranged in the radial direction.
[0010] Furthermore, the main frame also includes a second fixing plate, which is arranged parallel above the first fixing plate. The first fixing plate and the second fixing plate are spaced apart to form an installation space, and the guide wheel is disposed within the installation space.
[0011] Furthermore, the drive assembly also includes a drive shaft, the drive source is a motor, the output end of the motor is connected to the drive shaft, and the drive shaft is fixedly connected to the guide wheel.
[0012] Furthermore, the upper surface of the second fixing plate is provided with a central hole, and a support bearing is provided in the central hole. The inner ring of the support bearing is fixedly connected to the drive shaft.
[0013] Furthermore, the drive assembly also includes a support plate and a first column. The support plate is disposed above the second fixed plate, and the support plate and the second fixed plate are connected through the first column. The drive source is fixedly installed on the support plate, and the support plate has a through hole for the drive shaft to pass through.
[0014] Furthermore, the main frame also includes a third fixing plate and a second column. The third fixing plate is located above the second fixing plate, and the second fixing plate and the third fixing plate are connected through the second column. The support plate is located in the space between the second fixing plate and the third fixing plate.
[0015] On the other hand, the present invention also provides a compressor including the aforementioned synchronous motion device.
[0016] The beneficial effects of this invention compared with the prior art are as follows: A synchronous motion device includes a main frame, a drive assembly, and at least two driven assemblies. The main frame is provided with a linear guide rail. The drive assembly includes a drive source and a guide wheel that is driven by the drive source. The guide wheel is provided with multiple curved grooves. Each driven assembly includes a guide member that is movably engaged with each curved groove, a slider connected to the guide member, and an actuator mounting part connected to the slider. When the guide wheel rotates, it pushes each guide member through the curved groove, causing each slider to move linearly along the linear guide rail under the drive of each guide member, thereby causing the actuator mounting part to move synchronously and concentrically along the radial direction of the guide wheel. By setting a guide wheel with a curved groove as the core driving medium and cooperating with the guide components in each driven assembly, while using linear guide rails on the main frame to constrain the movement direction of the sliders, a single drive source can synchronously drive all actuator mounting parts. This structure cleverly uses the geometric contour of the curved groove to directly and deterministically convert the rotational motion of the drive wheel into the precise linear motion of multiple sliders along the guide rails. This significantly simplifies the overall mechanical structure, greatly reduces manufacturing costs and the complexity of the control system, and fundamentally ensures the strict synchronization and extremely high concentricity of the movement of all actuator mounting parts, improving the reliability and motion accuracy of the device.
[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other objectives, features and advantages of the present invention more obvious and understandable, preferred embodiments are described in detail below. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 A schematic diagram of the structure of a synchronous motion device (outer expansion state) provided for a specific embodiment of the present invention; Figure 2 A schematic diagram of the structure of a synchronous motion device (inward state) provided for a specific embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a synchronous motion device provided in a specific embodiment of the present invention; Figure 4A schematic diagram of the installation of a power source provided for a specific embodiment of the present invention; Figure 5 A schematic diagram of the main frame provided in a specific embodiment of the present invention; Figure 6 An assembly diagram of the first fixing plate and the second fixing plate provided for a specific embodiment of the present invention; Figure 7 A schematic diagram of the structure of the first fixing plate provided in a specific embodiment of the present invention; Figure 8 A state diagram showing the actuator mounting part installed on the first fixed plate, provided for a specific embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the action execution of a synchronous motion device provided in a specific embodiment of the present invention.
[0020] Figure Labels 1. Main frame; 11. First fixing plate; 111. Center part; 112. Guide part; 1121. Linear guide rail; 12. Second fixing plate; 121. Center hole; 1211. Support bearing; 13. Third fixing plate; 14. Second column; 2. Drive assembly; 21. Drive source; 22. Guide wheel; 221. Curved groove; 23. Drive shaft; 24. Support plate; 25. First column; 3. Driven assembly; 31. Actuator mounting part; 32. Guide component; 33. Slider; 100. Actuator. Detailed Implementation
[0021] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0027] In the field of mechanical automation, especially in scenarios requiring multiple end effectors to achieve synchronized radial contraction or expansion movements, such as multi-jaw manipulators, variable-diameter grippers or molds, optical lens centering mechanisms, and precision alignment devices, achieving high-precision synchronous and concentric motion has always been a key technological challenge. Existing technical solutions mainly suffer from two types of representative defects: The first approach involves equipping each actuator mounting section with an independent drive unit (such as a servo motor, linear motor, or cylinder) and performing complex synchronous control through a host controller. While this approach theoretically enables flexible movement, it results in a large number of system components, complex wiring, and high overall cost. Furthermore, the mechanical errors, response delays, and slight asynchrony of control commands in each drive unit can accumulate, making it difficult to maintain strict radial movement of all actuator ends relative to an absolutely fixed center during dynamic processes; in other words, "concentricity" accuracy is difficult to guarantee.
[0028] The second type of solution employs traditional mechanical linkage mechanisms, such as sector gear linkages, synchronous belt pulley systems, or multi-cam systems. While these solutions reduce the number of drive sources, their structures are often inherently complex and bulky, with numerous kinematic pairs. Accumulated backlash can amplify transmission errors, making it difficult to achieve high rigidity and high precision motion transmission. More importantly, their kinematic design often struggles to ensure that the instantaneous motion directions of all output points precisely converge at a fixed center point, meaning that while achieving synchronous expansion and contraction, it is difficult to strictly guarantee concentricity. Therefore, existing technologies generally suffer from problems such as complex structures, high manufacturing costs, limited motion accuracy (especially concentricity), and a need to improve reliability and stability.
[0029] Therefore, there is an urgent need for a mechanical device that is simple in structure, low in cost, and can ensure high-precision synchronous concentric motion.
[0030] To address the aforementioned problems, this invention is proposed, and will be described below through specific embodiments.
[0031] Figures 1 to 9 As shown, this embodiment of the invention provides a synchronous motion device, including a main frame 1, a drive assembly 2, and at least two driven assemblies 3. The main frame 1 is provided with a linear guide rail 1121. The drive assembly 2 includes a drive source 21 and a guide wheel 22 that is driveably connected to the drive source 21. The guide wheel 22 is provided with multiple curved grooves 221. Each driven assembly 3 includes a guide member 32 that is movably engaged with each curved groove 221, a slider 33 connected to the guide member 32, and an actuator 100 connected to the slider 33. The actuator mounting part 31 can be a mounting plate, fixedly connected to the slider 33, for mounting the final actuator 100, such as a mechanical finger, gripper, processing head, or vane in a compressor. When the guide wheel 22 rotates, it pushes each guide member 32 through the curved grooves 221, causing each slider 33 to move linearly along the linear guide rail 1121 under the drive of each guide member 32, thereby causing the actuator 100 to move synchronously and concentrically along the radial direction of the guide wheel 22.
[0032] By setting a guide wheel 22 with a curved groove 221 as the core driving medium and cooperating it with the guide member 32 in each driven component 3, and using the linear guide rail 1121 on the main frame 1 to constrain the movement direction of the slider 33, only a single drive source 21 is needed to synchronously drive all actuators 100. This structure cleverly uses the geometric contour of the curved groove 221 to directly and deterministically convert the rotational motion of the drive wheel into the precise linear motion of multiple sliders 33 along the guide rail, thereby significantly simplifying the overall mechanical structure, greatly reducing manufacturing costs and the complexity of the control system, and fundamentally ensuring the strict synchronization and extremely high concentricity of the movement of all actuators 100, improving the reliability and motion accuracy of the device.
[0033] In some embodiments, the outline of each curved groove 221 is an involute, and each involute has the same base circle and development angle. Specifically, an involute refers to the trajectory of any point on a straight line (generating line) when it rolls purely along a fixed circle (base circle). In this embodiment, a continuous arc segment of the trajectory is taken as the center line of the curved groove 221. The fact that each involute has the same base circle means that the virtual base circle used for all curved grooves 221 is unique and has a fixed radius. This base circle is a virtual circle concentric with the guide wheel 22, and its center is the absolute center point in the kinematic sense of the entire device. The fact that each involute has the same development angle means that the range and pattern of variation of the development angle (i.e., the angle the generating line rotates from its starting position to form a point on the curve segment, or the corresponding central angle on the base circle) of each involute segment used as a curved groove 221 are the same. More specifically, if the development angle is used as a parameter, the contour of each curved groove 221 can be described by the same parametric equation, the only difference being their initial phase angle (i.e., the starting position set on the circumference of the guide wheel 22 is different).
[0034] Since all the curved grooves 221 are equal-phase copies of the same involute profile on the circumference, according to the properties of the involute, the equal change in the aspect ratio directly affects the equal change in radial displacement. Therefore, the radial displacement, velocity, and acceleration of all sliders 33 and actuators 100 are theoretically completely consistent at any given time, achieving rigid, absolute synchronization guaranteed by mechanical geometry, and completely eliminating the error caused by asynchronous control from multiple independent drive sources 21. Simultaneously, because the linear guide 1121 forces the slider 33 to move only radially, this radial direction is the normal direction of the slider 33's trajectory. All involutes based on the same base circle and with the same aspect ratio have points with the same aspect ratio. Regardless of the position of the guide wheel 22, the line of action of the force exerted by each curved groove 221 on its corresponding guide member 32 points towards (or away from) the same fixed point, i.e., the center of the common base circle. This ensures that the extension of the trajectory line (radial straight line) of each slider 33 precisely intersects this fixed center at any given time, thus achieving concentric radial expansion and contraction motion.
[0035] exist Figure 3 and Figure 8 In the embodiment shown, the guide 32 is a rolling bearing, which is located in the curved groove 221 and the outer ring of the rolling bearing is movably disposed relative to the side wall of the curved groove 221. The inner ring of the rolling bearing is connected to the slider 33 by a connecting shaft.
[0036] Specifically, the outer diameter of the rolling bearing should be slightly smaller than the width of the curved groove 221 on the guide wheel 22 to ensure that the outer ring of the rolling bearing can be placed inside the curved groove 221 and maintain contact with both side walls of the curved groove 221 (i.e., the radial inner and outer edges of the curved groove 221), while leaving a small clearance to avoid jamming and achieve smooth rolling. The connecting shaft is a rigid shaft. One end of the connecting shaft is stepped or uses an interference fit to fix it to the inner ring of the rolling bearing. The other end of the connecting shaft is used to connect to the slider 33. This end can be machined with external threads for screwing into the corresponding threaded hole on the slider 33 and can be locked with a nut, or fixed to the side of the slider 33 by a flange and bolts, or radially fixed by a pin or set screw. The slider 33 can be provided with an upwardly protruding connecting part or a vertical hole to accommodate and fix this end of the connecting shaft. Therefore, the rolling bearing and the slider 33 form a rigid connection through the connecting shaft.
[0037] During assembly, the rolling bearing is embedded from above into the curved groove 221 of the guide wheel 22. The outer cylindrical surface of its outer ring is in direct contact with the side wall of the curved groove 221. The connecting shaft is positioned perpendicular to the disk surface of the guide wheel 22, with its upper end fixed to the inner ring of the rolling bearing and its lower end fixed to the slider 33. The slider 33 is nested on the linear guide rail 1121 of the main frame 1. When the drive assembly 2 drives the guide wheel 22 to rotate, the side wall of the curved groove 221 generates contact pressure on the outer ring of the rolling bearing embedded therein. Since the relative movement between the outer ring and the groove wall is designed to be rolling rather than sliding, this contact pressure will mainly be converted into a torque that causes the balls (or rollers) of the rolling bearing to roll between the inner and outer raceways. Since the inner ring is fixed to the slider 33 by the connecting shaft, and the slider 33 is constrained by the linear guide rail 1121 to move only radially, the rolling bearing as a whole cannot rotate freely in the groove, but rather, under the push of the groove wall, generates a composite motion tendency that changes along the contour of the curved groove 221. In this motion trend, the component perpendicular to the allowed radial motion direction of slider 33 is resisted by the rigid constraint of linear guide 1121; while the radial component is realized, transforming into precise radial linear motion of slider 33 along linear guide 1121. Throughout the process, the relative motion between the outer ring of the rolling bearing and the steel groove wall, as well as between the internal balls and raceways, is carried out with extremely low rolling friction, thereby efficiently and smoothly transmitting the power of guide wheel 22 to slider 33.
[0038] By using rolling bearings, energy consumption can be reduced, and the wear of the guide wheel 22, the curved groove 221, and the guide component 32 itself can be greatly reduced, thereby improving the service life of the entire device and the long-term motion accuracy retention.
[0039] exist Figure 7 In the embodiment shown, the main frame 1 includes a first fixing plate 11, the first fixing plate 11 includes a central portion 111 and guide portions 112 extending radially in multiple directions along the central portion 111, and the guide portions 112 are provided with linear guide rails 1121 arranged in the radial direction.
[0040] The first fixed plate 11 is a metal sheet with sufficient thickness and rigidity, such as aluminum alloy, steel, or cast iron, machined from it. The central portion 111 of the first fixed plate 11 refers to a reinforced structural part in the geometric center region of the first fixed plate 11, which is a ring-shaped area around the center point. The guide portions 112 are structural arms that extend radially outward from the central portion 111. The number of guide portions 112 is equal to the number of driven components 3 (and actuators 100), and they are evenly distributed in the circumferential direction to ensure symmetrical force distribution and motion. Each guide portion 112 is structurally integrally formed with the central portion 111 (e.g., by casting or milling from a single piece of material), or is fixed to the central portion 111 by a high-strength mechanical connection (e.g., bolt connection, key connection with screws) to ensure its position relative to the central portion 111 is absolutely fixed. The guide portion 112 is elongated, and its length determines the maximum radial stroke of the slider 33 and the actuator 100. In cross-section, the guide portion 112 can be designed as a T-shape, I-shape, or rectangle to reduce weight while ensuring its bending and torsional stiffness.
[0041] The upper surface of each guide section 112 is machined into a mounting plane, and the linear guide rail 1121 is fixedly mounted on this plane. The linear guide rail 1121 here is a mature linear motion component in the art, and its structure will not be described in detail.
[0042] Because the radial guide section 112 structure naturally matches the working condition of synchronous radial motion, the layout is compact and efficient. The force transmission path (from slider 33 to guide section 112 to center section 111) is short and direct, avoiding detours and bends, and reducing energy loss and deformation during the transmission process.
[0043] exist Figure 3 In the embodiment shown, the main frame 1 further includes a second fixing plate 12, which is arranged parallel above the first fixing plate 11. The first fixing plate 11 and the second fixing plate 12 are spaced apart to form an installation space, and the guide wheel 22 is disposed in the installation space.
[0044] Specifically, the second fixing plate 12 can be a metal sheet with considerable thickness and rigidity. Its planar projection shape is preferably similar to or identical to that of the first fixing plate 11. Spatially, the second fixing plate 12 is positioned parallel to the first fixing plate 11. This parallel spacing between the two plates can be achieved using multiple columns or support columns. These columns are evenly distributed in a circular pattern, and their end faces are machined into strictly parallel planes. The installation space is a flat, box-shaped, or disc-shaped cavity enclosed by the upper surface of the first fixing plate 11, the lower surface of the second fixing plate 12, and the inner surfaces of the surrounding columns. The height of this cavity must be greater than the thickness of the guide wheel 22, and sufficient, uninterrupted free space must be reserved for the rotation of the guide wheel 22 and the movement of the guide member 32 in the driven assembly 3.
[0045] The guide wheel 22 is accommodated in the installation space. A certain gap is left between the lower surface of the guide wheel 22 and the upper surface of the first fixing plate 11, which is sufficient to avoid any possible friction. A similar gap is left between the upper surface of the guide wheel 22 and the lower surface of the second fixing plate 12.
[0046] The combination of the first fixing plate 11 and the second fixing plate 12 has excellent bending and torsional stiffness, which can effectively suppress frame deformation or vibration that may occur under load or high-speed movement. The presence of the second fixing plate 12 provides a direct and stable mounting base for the upper drive assembly 2, making the support of the entire drive chain from the motor to the guide wheel 22 more solid and reducing transmission errors.
[0047] exist Figure 3 In the embodiment shown, the drive assembly 2 further includes a drive shaft 23, the drive source 21 is a motor, the output end of the motor is connected to the drive shaft 23, and the drive shaft 23 is fixedly connected to the guide wheel 22.
[0048] The drive source 21 is preferably a rotary motor, but can be a stepper motor, servo motor, or brushless DC motor, depending on the required control precision, torque, and speed. To obtain greater output torque and reduce speed, the motor is integrated with or connected in series with a reducer to form an integrated motor-reducer unit or a separate unit. The reducer can be a planetary gear reducer, worm gear reducer, or harmonic reducer, and its reduction ratio is selected based on the required operating speed of the guide wheel 22 and the characteristics of the motor.
[0049] The drive shaft 23 is a rotating shaft with sufficient torsional strength and rigidity. Its main function is to transmit the rotational power of the motor to the guide wheel 22. Its connection to the motor output is achieved through a coupling; for high-precision transmission, a diaphragm coupling or a perforated flexible coupling can be used. During installation, one end of the coupling is fixed to the motor output shaft using a set screw or key, and the other end is fixed to the upper end of the drive shaft 23 in the same manner.
[0050] The lower end of the drive shaft 23 extends into the mounting space formed by the first and second fixing plates 12. The fixed connection between the drive shaft 23 and the guide wheel 22 is the final link in realizing power transmission, and its connection must be firm, reliable and well-aligned.
[0051] A tapered clamping sleeve can be designed at the center hole 121 of the guide wheel 22, or at least two set screws can be directly installed radially on the hub. After the guide wheel 22 is fitted into the drive shaft 23, tighten the clamping nut of the clamping sleeve or the radial set screws to fix the shaft and wheel by friction. This method facilitates the adjustment of the circumferential phase of the guide wheel 22.
[0052] When in operation, the motor is powered on and runs, outputting torque and speed. The torque and speed are adjusted by the reducer and transmitted to the drive shaft 23 through the coupling. The drive shaft 23 transmits the rotational motion to the guide wheel 22 which is fixedly connected to it. The guide wheel 22 begins to rotate around its central axis, and the curved groove 221 on it begins to work.
[0053] exist Figure 6 In the embodiment shown, the upper surface of the second fixing plate 12 is provided with a central hole 121, and a support bearing 1211 is provided in the central hole 121. The inner ring of the support bearing 1211 is fixedly connected to the drive shaft 23.
[0054] Specifically, the center hole 121 is a stepped hole, comprising an upper section with a larger diameter and a lower section with a smaller diameter, forming an annular shoulder at their junction. The diameter of the upper section matches the outer diameter of the selected support bearing 1211 to accommodate the bearing outer ring; the diameter of the lower section is slightly larger than the diameter of the drive shaft 23, providing passage space for the drive shaft 23 and preventing friction. The type of support bearing 1211 can be selected according to load and precision requirements. For applications where radial loads are primarily borne and a certain amount of axial clearance is permissible, a deep groove ball bearing is preferred.
[0055] To facilitate assembly and adjustment, a bearing housing can be installed in the center hole 121. First, press the bearing into the bearing housing, then insert the entire housing into the center hole 121 of the second fixing plate 12 with an transition fit, and press the outer ring of the bearing from above with an end cap or retaining ring.
[0056] When the drive shaft 23 rotates under the drive of the motor, its rotation center line is defined by the support bearing 1211. The second fixed plate 12, as a stable mounting platform, provides an intermediate fulcrum for the entire rotating shaft system through the bearing in its central hole 121, thereby improving the operational stability of the guide wheel 22.
[0057] exist Figure 3In the embodiment shown, the drive assembly 2 further includes a support plate 24 and a first column 25. The support plate 24 is located above the second fixed plate 12. The support plate 24 and the second fixed plate 12 are connected through the first column 25. The drive source 21 is fixedly installed on the support plate 24. The support plate 24 has a through hole for the drive shaft 23 to pass through.
[0058] The support plate 24 is a rigid plate independent of the second fixing plate 12, and its planar shape is preferably circular or square. The first columns 25 are multiple (usually three or four, evenly distributed along the circumference) solid cylindrical, rectangular, or profile (such as aluminum profile) support rods. Both end faces of these first columns 25 are machined into parallel and smooth planes. On the upper surface of the second fixing plate 12, corresponding to the positions of these columns, threaded blind holes or through holes are machined; on the corresponding positions on the lower surface of the support plate 24, corresponding mounting holes (through holes or threaded holes) are also machined. During installation, the lower end of the first column 25 is fastened to the second fixing plate 12 using hexagonal socket head cap screws or stud bolts; its upper end is fastened to the support plate 24 in the same manner. By precisely controlling the consistency of the length of all the first columns 25, it can be ensured that the support plate 24 is installed strictly parallel to the second fixing plate 12, and that a preset, stable vertical distance is maintained between them. This distance provides the necessary space to accommodate any couplings, part of the drive shaft 23, and to allow for maintenance operations.
[0059] Secondly, the drive source 21 is fixed to the upper surface of the support plate 24 via its own mounting flange or base. For a secure installation, the upper surface of the support plate 24 needs to be machined with threaded holes or smooth holes (for bolts and nuts) that perfectly match the motor mounting holes. During installation, the motor is typically placed in position first, with the motor output shaft roughly aligned with the through holes on the support plate 24, and then high-strength bolts are used to lock the motor onto the support plate 24 from bottom to top or from top to bottom. To ensure the alignment of the motor shaft with the lower drive shaft 23, fine-tuning may be necessary after initial installation or maintenance.
[0060] The through hole on the support plate 24 is located in the central area of the support plate 24, and its diameter must be larger than the diameter of the drive shaft 23 or the maximum outer diameter of the coupling to ensure that these rotating parts do not come into contact with or interfere with the support plate 24 when rotating. This through hole not only provides a passage for the drive shaft 23 to pass through.
[0061] The support plate 24 is rigidly connected to the sturdy second fixing plate 12 below by the first column 25, essentially creating an installation bridge elevated above the main frame 1. This structure effectively isolates the motor's own vibration, preventing it from being directly transmitted to the main frame 1; at the same time, it can also resist the interference of the working reaction force transmitted from below on the motor installation accuracy, ensuring the long-term stability of the motor installation reference.
[0062] exist Figure 3 In the embodiment shown, the main frame 1 also includes a third fixing plate 13 and a second column 14. The third fixing plate 13 is located above the second fixing plate 12. The second fixing plate 12 and the third fixing plate 13 are connected by the second column 14. The support plate 24 is located in the space between the second fixing plate 12 and the third fixing plate 13.
[0063] The third fixing plate 13 is the topmost structural plate in the main frame 1, and it is a thick plate that is round or square. Its core function is to serve as the top cover and mounting reference for the entire device, facilitating the easy connection of flanges to components using the device.
[0064] The lower end of the second column 14 is fixed to a pre-set position on the upper surface of the second fixing plate 12 using high-strength bolts, while the upper end is fixed to the corresponding position on the lower surface of the third fixing plate 13 in the same manner. By precisely controlling the length of the second column 14, the third fixing plate 13 is installed strictly parallel to the second fixing plate 12, forming an upper-level space with a defined height between them. The height design of this upper-level space needs to be carefully considered, ensuring it is sufficient to accommodate the support plate 24, the motor mounted on the support plate 24, the coupling, part of the drive shaft 23, and necessary maintenance and operation clearances, while also being as compact as possible to save vertical space.
[0065] In some embodiments, the present invention also provides a compressor including the aforementioned synchronous motion device. Apart from the aforementioned synchronous motion device, the remaining structure of the compressor is the same as that in the prior art, and will not be described in detail here.
[0066] It should be noted that the compressor provided in this embodiment of the invention includes the aforementioned synchronous motion device, and therefore the compressor has all the beneficial effects of the aforementioned synchronous motion device, which will not be repeated here.
[0067] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A synchronous motion device, characterized in that, include: The main frame is equipped with linear guide rails; A drive assembly includes a drive source and a guide wheel that is drively connected to the drive source, the guide wheel having multiple curved grooves. At least two driven components, each driven component including a guide that movably engages with each of the curved grooves, a slider connected to the guide, and an actuator mounting part connected to the slider; When the guide wheel rotates, it pushes each of the guide members through the curved groove, causing each of the sliders to move linearly along the linear guide rail under the drive of each of the guide members, thereby causing the actuator mounting part to move synchronously and concentrically along the radial direction of the guide wheel.
2. The synchronous motion device according to claim 1, characterized in that, The outline of each of the curved grooves is an involute, and each involute has the same base circle and development angle.
3. The synchronous motion device according to claim 1, characterized in that, The guide component is a rolling bearing, which is located in the curved groove and its outer ring is movably disposed relative to the side wall of the curved groove. The inner ring of the rolling bearing is connected to the slider through a connecting shaft.
4. The synchronous motion device according to claim 1, characterized in that, The main frame includes a first fixing plate, which includes a central portion and guide portions extending radially in multiple directions along the central portion. The guide portions are provided with linear guide rails arranged in the radial direction.
5. A synchronous motion device according to claim 4, characterized in that, The main frame also includes a second fixing plate, which is arranged parallel to the top of the first fixing plate. The first fixing plate and the second fixing plate are spaced apart to form an installation space, and the guide wheel is located in the installation space.
6. A synchronous motion device according to claim 5, characterized in that, The drive assembly further includes a drive shaft, the drive source is a motor, the output end of the motor is connected to the drive shaft, and the drive shaft is fixedly connected to the guide wheel.
7. A synchronous motion device according to claim 6, characterized in that, The upper surface of the second fixing plate is provided with a central hole, and a support bearing is provided in the central hole. The inner ring of the support bearing is fixedly connected to the drive shaft.
8. A synchronous motion device according to claim 6, characterized in that, The drive assembly further includes a support plate and a first column. The support plate is located above the second fixed plate and is connected to the second fixed plate via the first column. The drive source is fixedly mounted on the support plate, and the support plate has a through hole for the drive shaft to pass through.
9. A synchronous motion device according to claim 8, characterized in that, The main frame also includes a third fixing plate and a second column. The third fixing plate is located above the second fixing plate. The second fixing plate and the third fixing plate are connected by the second column. The support plate is located in the space between the second fixing plate and the third fixing plate.
10. A compressor, characterized in that, Includes the synchronous motion device as described in any one of claims 1-9.