A single-shaft direct-drive movement

Abstract

The utility model discloses a single -shaft direct drive core adopts eccentric rotation axis connection fixed axle and upper disc, and the single -shaft eccentric structure that forms, compares many axle and has simplified relative position's processing requirement, and the processing difficulty has reduced greatly, and the weight of core is reduced greatly simultaneously, and the elastic constraint of cooperation elastic swing frame to upper disc makes the directional eccentric rotation of upper disc when moving, and through the elastic reset effect, effectively eliminates the eccentricity of single -shaft eccentric structure.

Description

Technical Field

[0001] This utility model belongs to the technical field of biochemical experimental equipment and relates to a single-axis direct-drive mechanism. Background Technology

[0002] Currently, most shaking table equipment on the market adopts an eccentric shaft structure to provide a repeated oscillation effect through rotation. In order to correct the deviation of the eccentric shaft and improve the stability of the device, existing technologies usually set multiple eccentric shafts to reduce the deviation problem. Common ones are three-axis or five-axis. However, multi-axis mechanisms have very high requirements for machining precision, which makes it difficult to control the pass rate and the manufacturing cost is very high. If the machining requirements are reduced, the service life will be reduced. At the same time, multi-axis mechanisms bring greater weight, which further increases the difficulty of transportation and assembly. In addition, existing shaking table mechanisms mostly use belt drive. The belt wears and sheds chips severely and is prone to slippage, resulting in a short service life and requiring frequent replacement. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a single-axis direct-drive mechanism.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A single-axis direct-drive mechanism is characterized by comprising a fixed shaft, an eccentric rotating shaft, a drive mechanism, an upper plate, and an elastic rocker arm. The eccentric rotating shaft is coaxially disposed on the fixed shaft, and the drive mechanism drives the eccentric rotating shaft to rotate relative to the fixed shaft. The upper plate is rotatably disposed on the eccentric rotating shaft, and the rotation axis of the upper plate is eccentrically positioned parallel to the axis of the fixed shaft at a predetermined interval. The elastic rocker arm includes an elastic element and a lower fixed plate and an upper fixed plate disposed at both ends of the elastic element, and the upper fixed plate is fixedly connected to the upper plate.

[0006] Furthermore, it also includes a lower plate, the bottom of which is fixedly connected to the lower plate, and the lower fixing plate is fixedly connected to the lower plate.

[0007] Furthermore, it also includes a fixed base, which is fixedly connected to the lower plate. The driving mechanism includes a magnet rotor and a coil stator. The magnet rotor is coaxial with the coil stator and is located on the inner circumference of the coil stator. The coil stator is fixedly disposed on the inner circumference of the fixed base, and the magnet rotor is fixedly disposed on the outer circumference of the eccentric rotating shaft.

[0008] Furthermore, the elastic element is a spring, and the two ends of the spring are respectively fixedly connected to the upper fixing plate and the lower fixing plate.

[0009] Furthermore, the elastic element consists of two springs, with both ends of the springs fixedly connected to the upper fixing plate and the lower fixing plate, respectively. The upper fixing plate, the lower fixing plate, and the two springs together form a quadrilateral frame.

[0010] Furthermore, the elastic element includes multiple springs and a right-angle fixing plate. The right-angle fixing plate includes a first straight edge and a second straight edge. The first straight edge and the lower fixing plate are enclosed by two springs to form a first frame. The second straight edge and the lower fixing plate are enclosed by two springs to form a second frame. The first frame and the second frame are stacked.

[0011] Furthermore, a lower bearing is sleeved between the fixed shaft and the eccentric rotating shaft.

[0012] Furthermore, an upper bearing is provided in the middle of the upper plate, and a central shaft passes through the axial direction of the upper bearing. The central shaft is fixedly connected to the upper plate.

[0013] Furthermore, it also includes a counterweight, which is fixedly connected to the eccentric rotating shaft and is positioned on the opposite side of the upper plate with the axis of the fixed shaft as the center of symmetry.

[0014] Furthermore, the lower plate is provided with multiple support legs, which are threadedly connected to the lower plate, and the bottom of the support legs is provided with rubber pads.

[0015] In summary, the advantages of this utility model are as follows:

[0016] The movement of this invention uses an eccentric rotating shaft to connect the fixed shaft and the upper plate, forming a single-axis eccentric structure. Compared with multi-axis movements, this simplifies the machining requirements for relative positions, significantly reduces machining difficulty, and greatly reduces the weight of the movement. Combined with the elastic constraint of the elastic swing frame on the upper plate, the upper plate makes a directional eccentric rotational motion during movement. At the same time, the elastic reset effect effectively eliminates the deviation of the single-axis eccentric structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the mechanism of this utility model.

[0018] Figure 2 for Figure 1 A structural diagram from another perspective.

[0019] Figure 3 This is a schematic diagram of the rotating mechanism.

[0020] Figure 4 for Figure 3 A cross-sectional structural diagram.

[0021] The diagram shows the following markings: 1. Lower plate; 11. Support leg; 21. Fixed shaft; 22. Fixed base; 221. Coil stator; 222. Magnet rotor; 23. Eccentric rotating shaft; 231. Lower bearing; 24. Upper plate; 241. Upper bearing; 25. Counterweight; 31. Lower fixed plate; 321. First straight edge; 322. Second straight edge; 33. Upper fixed plate; 34. Spring. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0025] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0026] This utility model embodiment provides a single-axis direct-drive mechanism, including a rotation mechanism and an orientation mechanism.

[0027] Reference Figure 1 and Figure 2 The orientation mechanism includes a lower plate 1 and an elastic swing frame. The lower plate 1 serves as the base of the entire movement. The elastic swing frame and the rotation mechanism are both mounted on the lower plate 1. The bottom of the lower plate 1 may also be provided with multiple adjustable feet 11 to adjust the height of the lower plate 1 from the ground and the stability and flatness when placed. Preferably, the feet 11 are threadedly connected to the lower plate 1 so as to be adjusted by rotating the shaft. More preferably, the bottom of the feet 11 is provided with rubber pads to improve adhesion and provide shock absorption and noise reduction effects.

[0028] Reference Figure 3 and Figure 4 As shown, the rotating mechanism is mounted on the lower plate 1. The rotating mechanism includes an upper plate 24, an upper bearing 241, an eccentric rotating shaft 23, a counterweight 25, a lower bearing 231, a fixed shaft 21, a magnet rotor 222, a coil stator 221, and a fixed base 22. The fixed base 22 is fixedly mounted to the top of the lower plate 1 using bolts or other connecting components. The fixed base 22 is located on the outer periphery of the fixed shaft 21. The bottom of the fixed shaft 21 is fixedly connected to the fixed base 22 or the lower plate 1. The axis of the fixed shaft 21 is vertically upward. The eccentric rotating shaft 23 is coaxially sleeved on the outer periphery of the fixed shaft 21 and connected via the lower bearing 231, allowing the eccentric rotating shaft 23 to rotate relative to the fixed shaft 21. Shaft 21 rotates smoothly. Preferably, there are two lower bearings 231, which are respectively fitted to the upper and lower parts of the fixed shaft 21. The upper plate 24 is set at the top of the eccentric rotating shaft 23, and the upper bearing 241 is set at the center of the upper plate 24, providing the upper plate 24 with a rotational effect relative to the upper bearing 241. The axial direction of the upper bearing 241 is provided by a central shaft, which is fixedly connected to the top of the eccentric rotating shaft 23. The central shaft and the axis of the fixed shaft 21 are set to be parallel and form a set distance, so that the upper plate 24 is located at an eccentric position of the fixed shaft 21. When the eccentric rotating shaft 23 rotates relative to the fixed shaft 21, the upper plate 24 rotates eccentrically with the central axis of the fixed shaft 21 as the rotation center.

[0029] Furthermore, the magnet rotor 222 and the coil stator 221 are coaxially arranged on the outer periphery of the eccentric rotating shaft 23, wherein the coil stator 221 is fixedly installed on the fixed base 22, and the magnet rotor 222 is arranged between the inner periphery of the coil stator 221 and the outer periphery of the eccentric rotating shaft 23, and the magnet rotor 222 is fixedly connected to the eccentric rotating shaft 23. The coil stator 221 generates a changing magnetic field by passing an external alternating current through a wire. The changing magnetic field generates a continuous interaction force with the magnet rotor 222, thereby driving the magnet rotor 222 to drive the eccentric rotating shaft 23 to rotate.

[0030] By combining the magnetic rotor 222 and the coil stator 221, the mechanism and the motor are integrated into a single assembly, which is directly driven by the motor's magnetic field. This eliminates transmission components such as belts, couplings, or gears, resulting in lossless transmission efficiency. Furthermore, the assembly is small in size and compact in structure, which can make some equipment smaller or desktop-sized.

[0031] The elastic rocker arm is mounted on the lower plate 1 to constrain the upper plate 24, causing it to perform only directional eccentric rotational motion. The elastic rocker arm includes an upper fixed plate 33, a lower fixed plate 31, and a spring 34. In some embodiments, the lower fixed plate 31 is fixedly mounted on the lower plate 1, one end of the spring 34 is connected to the lower fixed plate 31, and the other end is connected to the upper fixed plate 33. The upper fixed plate 33 is fixedly connected to the upper plate 24. During the rotation drive of the eccentric rotation shaft 23, the upper plate 24 is constrained by the spring 34, limiting its own rotation. Within the elastic range of the spring 34, the upper plate 24 performs eccentric rotational motion.

[0032] While the spring 34 provides constraint on the movement of the upper plate 24, the elasticity of the spring 34 itself is applied to the upper plate 24, which further reduces or even eliminates the deviation of the single-axis eccentric movement of the upper plate 24, thereby providing a more stable oscillation effect. The spring 34, the upper fixed plate 33 and the lower fixed plate 31 are made of sheet metal, which is easy to disassemble and replace during long-term use to ensure good elasticity.

[0033] In some preferred embodiments, the elastic rocker includes a lower fixed plate 31, a right-angle fixed plate, an upper fixed plate 33, and springs 34. The lower fixed plate 31 is fixedly installed on the lower plate 1 and has a straight structure. Springs 34 are connected to both ends of the lower fixed plate 31, with each spring 34 forming a predetermined angle with the lower fixed plate 31. The right-angle fixed plate includes a first straight side 321 and a second straight side 322, which are fixedly connected to form an L-shaped right-angle structure. The two ends of the first straight side 321 are connected to the ends of the two springs 34, respectively. The lower fixed plate 31, the first straight edge 321, and the two springs 34 together form a quadrilateral first frame; the second straight edge 322 is set higher than the first straight edge 321, and the two ends of the second straight edge 322 are respectively connected to the other two springs 34. The upper fixed plate 33 is respectively connected to the ends of the other two springs 34, so that the second straight edge 322, the upper fixed plate 33, and the other two springs 34 together form a quadrilateral second frame. The upper plate 24 is fixedly connected to the upper fixed plate 33, and the upper fixed plate 33 constrains the rotation of the upper plate 24 itself.

[0034] The rectangular frame relies on the elasticity of the spring 34 to have a set swing range in the lateral direction. In this embodiment, it is preferred to use a first rectangular frame and a second rectangular frame stacked in the height direction. The first rectangular frame and the second rectangular frame respectively form two mutually perpendicular lateral movement directions. Without increasing the lateral dimension of the overall elastic swing frame, the upper limit of the swing range of the elastic swing frame is increased, which is suitable for the eccentric movement trajectory of the upper plate 24. At the same time, within the set swing range, the bending degree of each spring 34 is reduced, thereby improving the stability of its structure and movement, improving the positional accuracy of the constraint, better eliminating deviation, and increasing the service life of the spring 34.

[0035] A counterweight 25 is also fixedly installed on the eccentric rotating shaft 23. Preferably, with the axis of the fixed shaft 21 as the center of symmetry, the counterweight 25 is set on the opposite side of the upper plate 24 to form a counterweight balance against the eccentric motion.

[0036] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A single-axis direct-drive mechanism, characterized in that, The device includes a fixed shaft (21), an eccentric rotating shaft (23), a drive mechanism, an upper plate (24), and an elastic rocker frame. The eccentric rotating shaft (23) is coaxially disposed on the fixed shaft (21). The drive mechanism drives the eccentric rotating shaft (23) to rotate relative to the fixed shaft (21). The upper plate (24) is rotatably disposed on the eccentric rotating shaft (23). The rotation axis of the upper plate (24) is parallel to the axis of the fixed shaft (21) at a set interval to form an eccentricity. The elastic rocker frame includes an elastic element and a lower fixed plate (31) and an upper fixed plate (33) disposed at both ends of the elastic element. The upper fixed plate (33) is fixedly connected to the upper plate (24).

2. The single-axis direct-drive mechanism according to claim 1, characterized in that, It also includes a lower plate (1), the bottom of the fixed shaft (21) is fixedly connected to the lower plate (1), and the lower fixed plate (31) is fixedly connected to the lower plate (1).

3. A single-axis direct-drive mechanism according to claim 2, characterized in that, It also includes a fixed base (22), which is fixedly connected to the lower plate (1). The driving mechanism includes a magnet rotor (222) and a coil stator (221). The magnet rotor (222) is coaxial with the coil stator (221) and is located on the inner circumference of the coil stator (221). The coil stator (221) is fixedly disposed on the inner circumference of the fixed base (22), and the magnet rotor (222) is fixedly disposed on the outer circumference of the eccentric rotating shaft (23).

4. A single-axis direct-drive mechanism according to claim 2, characterized in that, The elastic element is a spring (34), and the two ends of the spring (34) are fixedly connected to the upper fixing plate (33) and the lower fixing plate (31) respectively.

5. A single-axis direct-drive mechanism according to claim 2, characterized in that, The elastic element consists of two springs (34), with the two ends of the springs (34) fixedly connected to the upper fixing plate (33) and the lower fixing plate (31) respectively. The upper fixing plate (33), the lower fixing plate (31), and the two springs (34) together form a quadrilateral frame.

6. A single-axis direct-drive mechanism according to claim 2, characterized in that, The elastic element includes a plurality of springs (34) and a right-angle fixing plate. The right-angle fixing plate includes a first straight edge (321) and a second straight edge (322). The first straight edge (321) and the lower fixing plate (31) are enclosed by two springs (34) to form a first frame. The second straight edge (322) and the lower fixing plate (31) are enclosed by two springs (34) to form a second frame. The first frame and the second frame are stacked.

7. A single-axis direct-drive mechanism according to claim 1, characterized in that, A lower bearing (231) is sleeved between the fixed shaft (21) and the eccentric rotating shaft (23).

8. A single-axis direct-drive mechanism according to claim 1, characterized in that, An upper bearing (241) is provided in the middle of the upper plate (24), and a central shaft is axially inserted through the upper bearing (241), and the central shaft is fixedly connected to the upper plate (24).

9. A single-axis direct-drive mechanism according to claim 1, characterized in that, It also includes a counterweight (25), which is fixedly connected to the eccentric rotating shaft (23) and is positioned on the opposite side of the upper plate (24) with the axis of the fixed shaft (21) as the center of symmetry.

10. A single-axis direct-drive mechanism according to claim 2, characterized in that, The lower plate (1) is provided with a plurality of support legs (11), the support legs (11) are threadedly connected to the lower plate (1), and the bottom of the support legs (11) is provided with rubber pads.

Images