A positioning device for annular workpieces

Abstract

This application discloses a positioning device for a ring-shaped workpiece, used to improve the positioning efficiency or assembly efficiency of the ring-shaped workpiece under complex working conditions. The application includes: a mounting base plate, a power-guided telescopic assembly, a V-shaped centering assembly, a pull-rope encoder assembly, a position switch, an elastic reset component, and a slewing support bearing; the power-guided telescopic assembly is fixed to the bottom of the mounting base plate, and one end of the power-guided telescopic assembly is connected to the V-shaped centering assembly; the pull-rope encoder assembly is located at the bottom of the mounting base plate and connected to the V-shaped centering assembly, used to sense the offset direction and offset amount of the V-shaped centering assembly; the slewing support bearing is mounted on the mounting base plate; the open end of the V-shaped centering assembly is provided with a position switch, which stops the slewing support bearing and the power-guided telescopic assembly when the ring-shaped workpiece is aligned to the position switch; the V-shaped centering assembly is provided with an elastic reset component for straightening the V-shaped centering assembly.

Description

Technical Field

[0001] This application relates to the field of ring-shaped workpiece assembly technology, and in particular to a positioning device for a ring-shaped workpiece. Background Technology

[0002] In the industrial manufacturing sector, there exist specialized components with clearly defined design parameters and functional positioning. Their structural form, material properties, and machining precision must be strictly adapted to the operational requirements of specific equipment. Ring-shaped workpieces, as components in mechanical structures, have a wide range of applications, such as sealing and connecting pipelines, coaxial positioning of precision rings, and flange connections. Due to their unique geometric shape and mechanical properties, ring-shaped workpieces have become the core carrier for achieving functional integration in various complex equipment.

[0003] With the increasing demands for equipment performance in the manufacturing sector, the assembly of ring-shaped workpieces has evolved from simple mechanical connections into a systems engineering process integrating geometric precision control, material interface mechanics, and intelligent detection technologies. The accuracy and reliability of ring-shaped workpiece assembly directly determine the operational performance and service life of the equipment. Current ring-shaped workpiece assembly technologies utilize laser displacement sensors and closed-loop control robots to achieve automated positioning of ring-shaped workpieces, thereby assisting in their assembly.

[0004] However, when using laser displacement sensors and closed-loop control robots to assist in the assembly of ring-shaped workpieces, they are easily affected by physical environmental interference such as dust, water mist, and oil, as well as electromagnetic interference, making them unsuitable for complex assembly environments. This results in low positioning or assembly efficiency for ring-shaped workpieces under complex working conditions, failing to meet current assembly requirements. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides a positioning device for a ring-shaped workpiece, which improves the positioning efficiency or assembly efficiency of the ring-shaped workpiece under complex working conditions.

[0006] The technical solution provided in this application is described below:

[0007] This application provides a positioning device for a ring-shaped workpiece, including: a mounting base plate, a power-guided telescopic assembly, a V-shaped centering assembly, a pull rope encoder assembly, a position switch, an elastic reset component, and a rotary support bearing;

[0008] The power-guided telescopic assembly is fixed to the bottom of the mounting base plate, and one end of the power-guided telescopic assembly is connected to the V-shaped centering assembly. The power-guided telescopic assembly is used to drive the V-shaped centering assembly to perform horizontal linear displacement, and the V-shaped centering assembly is used to clamp the centering annular workpiece.

[0009] The pull-cord encoder assembly is disposed at the bottom of the mounting base plate and connected to the V-shaped alignment assembly. The pull-cord encoder assembly is used to sense the offset and displacement of the V-shaped alignment assembly.

[0010] The slewing support bearing is mounted on the mounting base plate, and the slewing support bearing is used to drive the mounting base plate to rotate and correct the offset direction of the V-shaped centering assembly;

[0011] The V-shaped centering component is provided with the positioning switch at its open end. The positioning switch is used to position the annular workpiece. When the annular workpiece is aligned with the positioning switch in the forward direction, the slewing support bearing and the power guide telescopic component stop operating.

[0012] The V-shaped centering assembly is provided with the elastic reset member, which is used to straighten the V-shaped centering assembly.

[0013] Optionally, the V-shaped centering assembly includes a V-shaped bracket, a pin shaft, a mounting beam bracket, and an idler wheel guide assembly;

[0014] The bottom end of the V-shaped frame is rotatably connected to the middle part of the mounting beam bracket via the pin.

[0015] The elastic reset element is installed on both sides of the V-shaped frame;

[0016] One end of the elastic reset member is connected to the V-shaped frame, and the other end is rotatably connected to the mounting beam bracket through the idler wheel guide assembly;

[0017] The mounting beam bracket is connected to one end of the power-guided telescopic assembly.

[0018] Optionally, the position switch is located at the center of the open end of the V-shaped frame.

[0019] Optionally, the draw rope encoder assembly includes a draw rope encoder and an encoder wire;

[0020] The pull-cord encoder is installed at the bottom of the other end of the mounting base plate and is connected to the V-shaped centering assembly via the encoder wire.

[0021] Optionally, the power-guided telescopic assembly includes a power-guided telescopic assembly and a guide assembly;

[0022] The power telescopic assembly is installed at the bottom of the mounting base plate and connected to the V-shaped centering assembly. The power telescopic assembly is used to provide horizontal linear displacement for the V-shaped centering assembly.

[0023] The guide component is arranged parallel to both sides of the power telescopic component, and one end of the guide component is connected to the V-shaped centering component. The guide component is used to guide the V-shaped centering component to move linearly.

[0024] Optionally, the power telescopic assembly includes a motor, a lead screw, a nut, and a telescopic rod;

[0025] One end of the lead screw is connected to the motor shaft of the motor;

[0026] The nut is sleeved on the lead screw;

[0027] The telescopic rod has a hollow structure. One end of the telescopic rod is fixedly connected to the nut, and the other end is connected to the V-shaped centering assembly.

[0028] Optionally, the guide assembly includes an optical axis and a linear bearing;

[0029] The optical axis is arranged parallel to both sides of the power telescopic component, and one end of the optical axis is connected to the V-shaped centering component;

[0030] The linear bearing is fixed to the mounting base plate and slidably connected to the optical axis.

[0031] Optionally, the idler wheel guide assembly includes an idler wheel, a first gear, and a second gear;

[0032] The idler wheel, the first gear, and the second gear are all mounted on the mounting beam bracket;

[0033] The two sides of the idler gear mesh with one side of the first gear and one side of the second gear, respectively;

[0034] The other end of the elastic reset member is rotatably connected to the mounting beam bracket via the idler wheel.

[0035] Optionally, a touch sensor is provided on the inner side of the V-shaped frame.

[0036] Optionally, a counterweight is provided at the bottom of the mounting base plate.

[0037] As can be seen from the above technical solutions, this application has the following beneficial effects:

[0038] 1. The positioning device for annular workpiece proposed in this application has a simple structure, is easy to use, and can operate stably in complex working environments, thereby improving the positioning efficiency and assembly efficiency of annular workpieces.

[0039] 2. A position switch is set on the V-shaped centering component. When the annular workpiece is aligned in the forward direction, it can sense and stop the operation of the slewing support bearing and the power guide telescopic component. Combined with the calculation data on the left and right sides of the pull rope encoder component, the center position of the annular workpiece can be obtained, realizing the positioning of the annular workpiece and avoiding excessive movement or offset.

[0040] 3. The elastic reset component enables the V-shaped alignment assembly to have a small range of adaptive offset adjustment capability. Simultaneously, the slewing support bearing can adjust the overall orientation of the device, increasing the adjustment offset range of the elastic reset component. The drawstring encoder assembly can sense the offset and displacement of the V-shaped alignment assembly and assist the slewing support bearing in correcting the offset of the V-shaped alignment assembly, improving positioning accuracy.

[0041] 4. The power-guided telescopic component drives the V-shaped centering component to move horizontally in a linear fashion, thus achieving efficient positioning operation in conjunction with the V-shaped centering component. Attached Figure Description

[0042] Figure 1 A schematic diagram of the positioning device for the annular workpiece provided in this application;

[0043] Figure 2 Another structural schematic diagram of the positioning device for the annular workpiece provided in this application;

[0044] Figure 3 A schematic diagram of the rotating structure of the rotary support bearing in the positioning device for the annular workpiece provided in this application;

[0045] Figure 4 A schematic diagram of the forward centering position switch of the annular workpiece in the V-shaped centering component of the positioning device for the annular workpiece provided in this application when it is in the forward state;

[0046] Figure 5 A schematic diagram of the forward centering switch of the annular workpiece in the positioning device for the annular workpiece provided in this application when the V-shaped centering component is in the offset state;

[0047] Figure 6 A schematic diagram illustrating the calculation of the center coordinates of the annular workpiece during offset in the positioning device for the annular workpiece provided in this application;

[0048] Figure 7 A schematic diagram illustrating the calculation of the center coordinates of the annular workpiece when there is no offset in the positioning device for the annular workpiece provided in this application;

[0049] Figure 8 A schematic diagram of the power telescopic component in the positioning device for the annular workpiece provided in this application;

[0050] Figure 9 A schematic diagram of the idler wheel guide assembly in the positioning device for the annular workpiece provided in this application. Detailed Implementation

[0051] In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and other terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to describe the relative positional relationship between the components or parts and do not specifically limit the specific installation orientation of each component or part.

[0052] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0053] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0054] Furthermore, the structures, proportions, sizes, etc., drawn in the accompanying drawings of this application are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0055] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] See Figures 1 to 7 This application first provides an embodiment of a positioning device for a ring-shaped workpiece, the embodiment including:

[0057] Mounting base plate 1, power-guided telescopic assembly 2, V-shaped centering assembly 3, pull rope encoder assembly 4, position switch 5, elastic reset component 6, and slewing support bearing 7;

[0058] The power-guided telescopic assembly 2 is fixed to the bottom of the mounting base plate 1, and one end of the power-guided telescopic assembly 2 is connected to the V-shaped centering assembly 3. The power-guided telescopic assembly 2 is used to drive the V-shaped centering assembly 3 to perform horizontal linear displacement, and the V-shaped centering assembly 3 is used to clamp the centering annular workpiece 8.

[0059] The pull-cord encoder assembly 4 is set at the bottom of the mounting base plate 1 and connected to the V-type centering assembly 3. The pull-cord encoder assembly 4 is used to sense the offset and displacement of the V-type centering assembly 3.

[0060] The slewing bearing 7 is mounted on the mounting base plate 1. The slewing bearing 7 is used to drive the mounting base plate 1 to rotate and correct the offset direction of the V-shaped centering assembly 3.

[0061] The V-shaped centering component 3 is equipped with a positioning switch 5 at its open end. The positioning switch 5 is used to position the annular workpiece 8. When the annular workpiece 8 is aligned with the positioning switch 5 in the forward direction, the slewing support bearing 7 and the power guide telescopic component 2 stop operating.

[0062] The V-shaped centering component 3 is equipped with an elastic reset member 6, which is used to straighten the V-shaped centering component.

[0063] The functions of each component in this embodiment are described in detail below:

[0064] Mounting base plate 1: Mounting base plate 1 is used to provide mounting positions for components such as power-guided telescopic assembly 2, V-shaped centering assembly 3, and slewing support bearing 7. It needs to bear the weight of each component as well as the forces and torques generated during operation. At the same time, the entire positioning device can be mounted on the rotating shaft of other equipment through the slewing support bearing 7 on mounting base plate 1 to cooperate with other equipment to complete the positioning and assembly of the ring workpiece 8.

[0065] Power-guided telescopic assembly 2: The power-guided telescopic assembly 2 can generate driving force to provide power for the horizontal linear displacement of the V-shaped alignment assembly 3, and guide the V-shaped alignment assembly 3 to move linearly, pushing the V-shaped alignment assembly 3 closer to or away from the annular workpiece 8.

[0066] V-shaped alignment component 3: Utilizing the characteristics of its V-shaped structure, the V-shaped alignment component 3 fits snugly against the outer contour of the annular workpiece 8, thereby clamping and centering the annular workpiece. Simultaneously, a position switch 5 on the V-shaped alignment component 3 can detect whether the annular workpiece 8 is properly aligned. The V-shaped alignment component 3 also features a resilient reset element 6, which can, to a certain extent, straighten the annular workpiece 8, ensuring the stability and reliability of the V-shaped alignment component 3.

[0067] Pull-wire encoder assembly 4: The pull-wire encoder assembly 4 is fixed to the bottom of the mounting base plate 1 and connected to the V-shaped alignment assembly 3. When the power-guided telescopic assembly 2 pushes the V-shaped alignment assembly 3 to move, the pull-wire encoder assembly 4 is stretched, calculating the displacement of the V-shaped alignment assembly 3. When the V-shaped alignment assembly 3 experiences posture deviation during the alignment of the annular workpiece 8, the pull-wire encoder assembly 4 is stretched or relaxed, causing the rotating parts inside the pull-wire encoder assembly 4 to rotate, calculating the displacement data and offset angle of the V-shaped alignment assembly 3, and assisting the slewing support bearing 7 in correcting the offset of the V-shaped alignment assembly 3, thereby improving positioning accuracy.

[0068] Position switch 5: Position switch 5 can be a contact switch or a non-contact sensor. In this application, position switch 5 is a contact switch. Contact switches can adapt to harsh working conditions such as dust, high temperature, and fluid impact. Contact switches come in various types, such as contact microswitches or contact limit switches. They may contain elastic rods and electrical contacts. A rubber buffer head can be provided at the front end of the rod to prevent rigid collision with the annular workpiece 8. In an ideal environment free from dust, high temperature, water mist, and other interference, position switch 5 can also be a non-contact switch, such as a photoelectric sensor, inductive sensor, or capacitive sensor. Non-contact switches can avoid losses caused by mechanical collisions and also have higher positioning accuracy. However, non-contact switches have higher environmental requirements and cannot adapt to harsh working conditions such as dust and water mist. When the device positions the annular workpiece 8, the annular workpiece 8 needs to be aligned with position switch 5 in a positive direction for positioning and subsequent positioning calculations. When the annular workpiece 8 is aligned to the centering position switch 5, the position switch 5 is triggered, causing the slewing support bearing 7 and the power guide telescopic assembly 2 to stop operating. At the same time, by combining the different values ​​on both sides of the pull rope encoder assembly 4, the size of the annular workpiece 8, and the geometric relationship of the V-shaped centering assembly 3, the coordinate position of the center of the annular workpiece 8 can be calculated, thereby achieving the positioning of the annular workpiece 8.

[0069] Elastic Reset Component 6: The elastic reset component 6 is installed in the V-shaped centering assembly 3 and can be a component with elastic energy storage, such as a nitrogen spring or a torsion spring structure. When a torsion spring structure is used as the elastic reset component 6, it can be installed at the rotational position at the bottom of the V-shaped centering assembly. When a nitrogen spring is used as the elastic reset component 6, it is symmetrically installed on both sides of the V-shaped centering assembly 3 and typically consists of a cylinder, piston, nitrogen chamber, and seals, providing elastic straightening force for the V-shaped centering assembly 3. This application uses a nitrogen spring as the specific example of the elastic reset component 6. When the V-shaped centering assembly 3 tilts due to workpiece offset or external force, the difference in elastic force between the two nitrogen springs can push the V-shaped centering assembly 3 to rotate, returning it to the center position. During the straightening process of the V-shaped centering assembly 3, the position of the annular workpiece 8 remains unchanged. Simultaneously, it buffers the impact force during the clamping process, preventing rigid collision damage to the workpiece.

[0070] Rotary support bearing 7: The rotary support bearing 7 supports the horizontal rotation adjustment of the positioning device for the annular workpiece. When the V-shaped centering component 3 experiences unilateral offset during the clamping and centering of the annular workpiece 8, the elastic reset component 6 will adaptively adjust the V-shaped centering component 3. However, the adjustment range of the elastic reset component 6 is limited. When the offset exceeds the adjustment range of the elastic reset component 6, rotational adjustment is required through the rotary support bearing 7. At this time, the corresponding side of the draw rope encoder component 4 is stretched, the displacement data and offset angle of the V-shaped centering component 3 are calculated, and fed back to the rotary support bearing 7. The rotary support bearing 7 rotates and adjusts according to the calculation of the draw rope encoder component 4. The side of the draw rope encoder component 4 that was originally stretched becomes slack, and then the draw rope encoder component 4 internally winds up the slack side, pulling the V-shaped centering component 3 to rotate within a certain range, correcting the offset direction and offset of the V-shaped centering component 3, so that the V-shaped centering component 3 maintains the correct posture, thereby ensuring the positioning accuracy of the annular workpiece 8. While correcting the offset, it provides stable support for the V-shaped alignment component 3, bearing the radial and axial loads generated by the V-shaped alignment component 3 during operation, and ensuring the stability of the V-shaped alignment component 3 throughout the positioning process.

[0071] Working Principle: When positioning or assembling the annular workpiece 8, the power-guided telescopic component 2 generates a horizontal linear driving force, pushing the V-shaped alignment component 3 closer to the annular workpiece 8. The pull-cord encoder component 4 is stretched, calculating the displacement of the V-shaped alignment component 3. The V-shaped alignment component 3 clamps and centers the annular workpiece 8 using its V-shaped structure. During clamping, if the V-shaped alignment component 3 deviates on one side, the corresponding side of the pull-cord encoder component 4 is stretched. The elastic reset component 6 will adaptively adjust the V-shaped alignment component 3 to straighten it. When the offset exceeds the adjustment range of the elastic reset component 6, the pull-cord encoder component 4 feeds back the offset amount and direction of the V-shaped alignment component 3 to the slewing support bearing 7. The slewing support bearing 7 rotates according to the calculation of the pull-cord encoder component 4. The side of the pull-cord encoder component 4 that was originally stretched becomes slack, and then the pull-cord encoder component 4 internally winds up the slack side, pulling the V-shaped alignment component 3 to adjust its posture within a certain range, correcting the offset direction and amount. When the annular workpiece 8 is aligned to the centering position switch 5, the drive of the power-guided telescopic assembly 2 stops, and the slewing support bearing 7 locks its current posture, achieving positioning. If the annular workpiece 8 is misaligned when the V-shaped centering assembly 3 is misaligned, the centering position switch 5 will also be triggered, causing the power-guided telescopic assembly 2 and the slewing support bearing 7 to lock their current posture, achieving positioning. The V-shaped centering assembly 3 may also be equipped with a positioning sensor, which can trigger a positioning signal upon contact with the annular workpiece 8. In scenarios with lower precision positioning of the annular workpiece 8, the position of the positioning sensor, the centering signal, and the positioning signal can be used to determine whether the annular workpiece 8 is in position. In scenarios with higher precision positioning of the annular workpiece 8, the specific planar coordinates (x, y) of the annular workpiece 8 can be calculated using a computing device based on the geometric dimensions of the annular workpiece 8 and the spatial angles of the V-shaped centering assembly 3, forming a more intelligent closed-loop control system. It should be noted that during the correction of the misalignment of the V-shaped centering assembly 3, the annular workpiece 8 maintains its original position and will not move with the directional adjustment of the device.

[0072] Calculation of the center coordinates of the annular workpiece 8: The V-shaped centering assembly 3 clamps and locks the annular workpiece 8 in its current posture, enabling its positioning. The center coordinates of the annular workpiece 8 can be calculated by combining the geometric relationship between the V-shaped centering assembly 3 and the annular workpiece 8, and the stretching amount of the pull-wire encoder assemblies 4 on both sides. This provides coordinate data for subsequent assembly operations. For example, with the slewing bearing 7 as the origin, the pull-wire encoder assemblies 4 are installed on the left and right sides of the mounting base plate, symmetrically on the x-axis, with a spacing of 2L. The initial position of the V-shaped centering assembly 3 is in the positive y-axis direction, with the center point of the open end being... (0, ), as the initial coordinates of V-shaped centering component 3, This is the distance from the center of the circle to the V-shaped centering assembly 3, i.e., the distance from the slewing bearing 7 to the V-shaped centering assembly 3. During positioning, the V-shaped centering assembly 3 moves linearly along the y-axis with the power-guided telescopic assembly, and may also displace in the x-axis direction due to offset. When the annular workpiece 8 contacts both sides of the V-shaped centering assembly 3 and is aligned with the centering switch 5, the center C(x, y) of the annular workpiece 8 is located in the horizontal plane.

[0073] When not offset, the linear displacement of the V-shaped centering component 3 along the y-axis is determined by the average tension of the two pull-wire encoder components 4. Calculations show that the y-axis coordinate of point P of the V-shaped centering component 3 is... When offsetting, the rotation adjustment of the slewing bearing 7 needs to be considered. The rotation angle of the slewing bearing 7 is... Therefore, after the rotation adjustment of the slewing bearing 7, the coordinates of point P are: The x-axis offset of the angle bisector of the V-shaped centering component 3 is calculated from the difference in the tension of the two pull-cord encoder components 4. The angle between the angle bisector and the y-axis Where S represents the tension of the draw-wire encoder assembly 4, and k is the proportionality coefficient between the tension of the draw-wire encoder assembly 4 and the x-axis displacement, calibrated by the geometric relationship of the wire path of the draw-wire encoder assembly 4. For example, when the x-axis offset is 1mm, the corresponding encoder wire tension is... mm, then =Tension unit length of the drawstring encoder assembly 4 / x-axis offset unit length. Measure the opening angle of the V-type alignment assembly 3 and set the opening angle of the V-type alignment assembly 3 to... When the annular workpiece 8 contacts both sides of the V-shaped centering assembly 3 and is in the forward centering position with the switch 5, the angle bisector of the V-shaped centering assembly 3 always points to the center C, and the vector direction from C to point P is consistent with the direction of the angle bisector of the V-shaped centering assembly 3. The distance from the center C of the annular workpiece 8 to point P is... (Where, r is the radius of the annular workpiece 8, which can be obtained by measuring the annular workpiece 8). When the V-shaped centering component 3 has no offset. The angle bisector coincides with the y-axis, and the center C of the circle lies on the y-axis with coordinates [missing information]. When the V-shaped centering component 3 is offset The angle bisector of the V-shaped centering component 3 makes an angle with the y-axis. Then the coordinates of the center C are obtained as follows: .

[0074] In this embodiment, the power-guided telescopic assembly 2 drives the V-shaped centering assembly 3 to move horizontally in a linear fashion, achieving efficient positioning. Furthermore, during the clamping process of the V-shaped centering assembly 3, the elastic reset component allows the V-shaped centering assembly 3 to have a small range of adaptive adjustment offset capability. Simultaneously, the rotary support bearing 7 can adjust the overall orientation of the device, increasing the adjustment offset range of the elastic reset component 6. The drawstring encoder assembly 4 measures the displacement and offset of the V-shaped centering assembly 3 and assists the rotary support bearing 7 in correcting the offset of the V-shaped centering assembly 3, improving positioning accuracy and providing positioning data for the annular workpiece 8. The V-shaped centering assembly 3 is also equipped with a position switch 5. When the annular workpiece 8 is aligned correctly, it can sense this and stop the rotary support bearing 7 and the power-guided telescopic assembly 2, thus achieving the positioning of the annular workpiece 8. The positioning device for the annular workpiece 8 has a simple overall structure, is easy to use, and can operate stably in complex working environments, exhibiting a certain degree of stability and reliability, thus improving the positioning and assembly efficiency of the annular workpiece 8.

[0075] Please see Figure 1 , Figure 2 as well as Figure 9 The elastic reset element 6 in this application can be implemented using various technologies and mechanical structures. This application provides a preferred embodiment, in which a nitrogen spring is used as the elastic reset element 6, and an idler wheel guide assembly 34 guides the elastic reset element 6 in direction. The following is a detailed description:

[0076] V-shaped centering assembly 3 includes V-shaped frame 31, pin 32, mounting beam bracket 33 and idler wheel guide assembly 34;

[0077] The bottom end of the V-shaped frame 31 is rotatably connected to the middle part of the mounting beam bracket 33 via a pin 32;

[0078] The elastic reset element 6 is installed on both sides of the V-shaped frame 31;

[0079] One end of the elastic reset member 6 is connected to the V-shaped frame 31, and the other end is rotatably connected to the mounting beam bracket 33 via the idler wheel guide assembly 34.

[0080] The crossbeam bracket 33 is connected to the power-guided telescopic assembly 2.

[0081] V-shaped frame 31: The bottom end of the V-shaped frame 31 is provided with a hinge hole, which is connected to the middle of the mounting beam bracket 33 through a pin 32 to form a rotatable hinge structure. This structure can accommodate ring-shaped workpieces 8 of different sizes and can be adjusted in angle with the elastic reset member 6. The position switch 5 is located at the center of the open end of the V-shaped frame 31, which can trigger the position switch 5 immediately when the ring-shaped workpiece 8 is aligned, avoiding accidental activation due to offset.

[0082] In some specific embodiments, a contact edge sensor is provided on the inner side of the V-shaped frame 31. When clamping and centering the annular workpiece 8 or when adjusting the offset of the V-shaped frame 31, the safety contact edge is squeezed, triggering a positioning signal to avoid overshoot or positional deviation. At the same time, it can also reduce frictional damage and collision loss between the V-shaped frame 31 and the annular workpiece 8.

[0083] Pin 32: Pin 32 is a cylindrical metal shaft that passes through the hinge hole at the bottom of the V-block 31 and the hinge seat in the middle of the mounting beam bracket 33, forming a rotating pair. Pin 32 is the fulcrum of rotation of the V-block 31, allowing the V-block 31 to rotate around its axis, so that the V-block 31 can flexibly adjust its angle and correct its clamping posture under the action of the elastic reset member 6.

[0084] Mounting beam bracket 33: The mounting beam bracket 33 is typically a frame structure welded together from metal plates or profiles. It serves as the supporting base for the V-shaped frame 31, transmitting the driving force of the power-guided telescopic assembly 2, and providing mounting points for the pin shaft 32, the elastic reset member 6, and the idler wheel guide assembly 34. The mounting beam bracket 33 has a pin shaft 32 mounting seat in the middle, and idler wheel guide assembly 34 mounting interfaces on both sides. Its bottom end is fixedly connected to one end of the power-guided telescopic assembly 2.

[0085] Idler wheel guide assembly 34: The idler wheel guide assembly 34 can guide the direction of the force of the elastic reset member 6, convert the linear thrust of the elastic reset member 6 into torque on the V-shaped frame 31, and at the same time amplify or adjust the lever arm, improve the straightening efficiency of the elastic reset member 6, and reduce energy loss.

[0086] Working Principle: The power-guided telescopic assembly 2 drives the mounting beam bracket 33 to move horizontally, causing the V-shaped frame 31 to approach and clamp the annular workpiece 8. When the V-shaped frame 31 tilts, one side of the elastic reset member 6 is compressed, while the other side extends, creating a difference in elastic force. Simultaneously, the pull rope encoder assembly 3 stretches along with the offset of the V-shaped frame 31. At this time, the idler wheel guide assembly 34 guides the elastic reset member 6 to straighten its direction, converting the elastic force into torque around the pin 32, pushing the V-shaped frame 31 to rotate and correcting the offset angle within a certain range. When the offset exceeds the adjustment range of the elastic reset member 6, the pull rope encoder assembly 4 feeds back the offset amount and direction of the V-shaped frame 31 to the rotary support bearing 7. The rotary support bearing 7 rotates according to the calculation of the pull rope encoder assembly 4, causing the previously stretched side of the pull rope encoder assembly 4 to slack off. The pull rope encoder assembly 4 then winds up the slack side, pulling the V-shaped frame 31 to rotate on the mounting beam bracket 33 around the pin 32 as the rotation axis, correcting the offset direction and amount of the V-shaped frame 31. When the surface of the annular workpiece 8 simultaneously touches the position switch 5, the trigger signal causes the power-guided telescopic assembly 2 and the slewing support bearing 7 to stop operating.

[0087] In this embodiment, the combination of the V-shaped frame 31, the elastic reset member 6, and the idler wheel guide assembly 34 enables the device to automatically adapt to annular workpieces 8 of different diameters. The positional deviation of the V-shaped frame 31 is corrected by the elastic force of the elastic reset member 6 and the directional guidance of the idler wheel guide assembly 34. Furthermore, the elastic characteristics of the elastic reset member 6 provide cushioning during clamping, preventing damage to the workpiece surface from rigid collisions. Simultaneously, the positioning switch 5 is located on the symmetrical center line of the V-shaped frame 31, ensuring that the annular workpiece 8 is triggered when aligned in the positive direction, thus improving positioning accuracy.

[0088] Please see Figure 1 and Figure 2 In an optional embodiment, the draw rope encoder assembly 4 includes a draw rope encoder 41 and an encoder wire 42;

[0089] The pull-cord encoder 41 is installed at the bottom of the other end of the mounting base plate 1 and is connected to the V-shaped centering assembly 3 via the encoder wire 42.

[0090] In this embodiment, the pull-rope encoder assembly 4 consists of a pull-rope encoder 41 and an encoder wire 42. The pull-rope encoder 41 is installed at the bottom of the other end of the mounting base plate 1. The encoder wire 42 extends horizontally along the bottom of the mounting base plate 1, maintaining a straight trajectory, and passes sequentially through the guide wheels at both ends of the V-shaped frame 31 on the V-shaped alignment assembly 3 and the guide wheels on both sides of the mounting beam bracket 33, entering the pull-rope encoder 41. The pull-rope encoder 41 includes a rope wheel, a spring drum, an encoder, and a signal processing circuit. The pull-rope encoder 41 has a sealed design, allowing it to work stably in harsh environments such as dust and oil. The spring drum drives the rope wheel to remain in a tightened state, and the encoder converts the rotation angle of the rope wheel into an electrical signal. When the power-guided telescopic assembly 2 drives the V-shaped alignment assembly 3 to move horizontally, the encoder wire 42 extends and retracts synchronously with the V-shaped alignment assembly 3, causing the rope wheel inside the pull-rope encoder 41 to rotate. The rotation angle of the rope wheel is linearly related to the displacement of the V-shaped alignment assembly 3. The pull-rope encoder 41 converts this rotation angle into an electrical signal and transmits it to the control system. If the V-shaped alignment component 3 shifts, the encoder wire 42 is stretched. The pull-rope encoder 41 monitors the amount and direction of this deviation and provides real-time feedback to the slewing support bearing 7 through the control system. This causes the slewing support bearing 7 to rotate the mounting base plate 1. The stretched side of the encoder wire 42 becomes slack, and the spring drum inside the pull-rope encoder 41 drives the rope wheel to remain in a tightened state, causing the slack encoder wire 42 to be wound up. This drives the V-shaped alignment component to rotate, correcting the offset direction of the V-shaped alignment component 3 and achieving dynamic adjustment.

[0091] Please see Figure 1 , Figure 2 as well as Figure 8In an optional embodiment, the power-guided telescopic assembly 2 includes a power-guided telescopic assembly 21 and a guide assembly 22; the power-guided telescopic assembly 21 is installed on the bottom of the mounting base plate 1 and connected to the V-shaped alignment assembly 3, and the power-guided telescopic assembly 21 is used to provide horizontal linear displacement for the V-shaped alignment assembly 3; the guide assembly 22 is arranged parallel to both sides of the power-guided telescopic assembly 21, and one end of the guide assembly 22 is connected to the V-shaped alignment assembly 3, and the guide assembly 22 is used to guide the linear movement of the V-shaped alignment assembly 3.

[0092] In this embodiment, the power telescopic component 21 and the guide component 22 can be implemented using various technologies and mechanical structures. The power telescopic component 21 can be a structure driven by a motor, such as a worm gear transmission, a gear and rack transmission, or a hydraulic cylinder. The guide component 22 can be a structure such as an optical shaft bearing or a guide rail slider. In some specific embodiments, the power telescopic component 21 adopts a telescopic structure of a lead screw 212 and a nut 213 driven by a motor 211, and the guide component 22 adopts a structure of an optical shaft 221 and a linear bearing 222. A detailed description follows:

[0093] The power telescopic assembly 21 includes a motor 211, a lead screw 212, a nut 213, and a telescopic rod 214;

[0094] One end of the lead screw 212 is connected to the motor shaft of the motor 211;

[0095] Nut 213 is fitted onto lead screw 212;

[0096] The telescopic rod 214 has a hollow structure. One end of the telescopic rod 214 is fixedly connected to the nut 213, and the other end is connected to the V-shaped centering component 3.

[0097] Motor 211: Motor 211 is the power source for realizing the linear movement of the V-shaped alignment component 3. Motor 211 is mounted on the end of the mounting base plate 1 near the V-shaped alignment component 3 to realize the extension and retraction movement of the V-shaped alignment component 3.

[0098] Lead screw 212: Lead screw 212 is a long, straight rod-shaped part, one end of which is fixedly connected to motor 211. When the motor shaft rotates, lead screw 212 will be driven to rotate by the motor shaft.

[0099] Nut 213: Nut 213 is sleeved on lead screw 212 and can move linearly along lead screw 212.

[0100] Telescopic rod 214: The telescopic rod 214 has a hollow structure. One end of the telescopic rod 214 is connected to the nut 213, and the other end is connected to the mounting beam bracket 33 in the V-shaped centering assembly 3. When the nut 213 moves linearly along the lead screw 212, the telescopic rod 214 moves accordingly, thereby driving the V-shaped centering assembly 3 to move linearly.

[0101] Working principle: When motor 211 is running, the motor shaft rotates and drives lead screw 212 to rotate. Nut 213, which is sleeved on lead screw 212, moves linearly along lead screw 212. Telescopic rod 214 is connected to nut 213. Therefore, as nut 213 moves, telescopic rod 214 drives mounting beam bracket 33 in V-shaped centering assembly 3 to move linearly, realizing linear movement of V-shaped centering assembly 3.

[0102] The guide assembly 22 includes an optical axis 221 and a linear bearing 222;

[0103] The optical axis 221 is arranged parallel to both sides of the power telescopic component 21, and one end of the optical axis 221 is connected to the V-shaped centering component 3;

[0104] The linear bearing 222 is fixed on the mounting base plate 1 and is slidably connected to the optical axis 221.

[0105] Optical axis 221: Optical axis 221 is a cylindrical shaft that can serve as a guide for linear motion and provide a sliding or rolling surface for linear bearing 222.

[0106] Linear bearing 222: The linear bearing 222 is fixed to the bottom of the mounting base plate 1 and sleeved on the optical shaft 221, using the optical shaft 221 as a guide rail. Usually, two or more linear bearings 222 are installed on the optical shaft 221 to improve sliding stability. The linear bearing 222 has built-in balls, which can realize low-friction linear motion.

[0107] Working principle: When the power telescopic assembly 21 drives the V-shaped centering assembly 3 to move linearly, the optical shaft 221 extends and retracts synchronously with the V-shaped centering assembly 3. The inner ring balls of the linear bearing 222, fixed on the mounting base plate 1, roll along the surface of the optical shaft 221, converting traditional sliding friction into rolling friction and reducing the sliding friction between the optical shaft 221 and the linear bearing 222. At the same time, the optical shaft 221 assists the V-shaped centering assembly 3 in moving linearly on both sides of the power telescopic assembly 21, which can distribute the load-bearing capacity of the power telescopic assembly 21, prevent the power telescopic assembly 21 from bending and deforming due to uneven loading, and guide the linear movement of the V-shaped centering assembly 3.

[0108] In this embodiment, the motor 211 in the power telescopic assembly 21 drives the lead screw 212 to rotate, driving the nut 213 to slide linearly. This, in turn, pushes the V-shaped centering assembly 3 to move via the telescopic rod 214. Simultaneously, the optical shafts 221 in the guide assemblies 22 extend and retract with the V-shaped centering assembly 3. The linear bearings 222, fixed to the mounting base 1, convert sliding friction into low-loss rolling friction through ball bearings, reducing sliding friction loss. Furthermore, the symmetrical support of the parallel optical shafts 221 disperses the load of the power assembly, preventing the lead screw 212 from bending due to uneven load, ensuring the V-shaped centering assembly 3 moves linearly. The power structure of the power guide telescopic assembly 2, driven by the motor 211, the lead screw 212, and the nut 213, works in conjunction with the guiding structure of the optical shafts 221 and the linear bearings 222, achieving linear motion and load optimization. This also extends the device's lifespan and improves its overall performance, making the positioning of the annular workpiece 8 more efficient.

[0109] Please see Figure 9 In an optional embodiment, the idler guide assembly 34 includes an idler wheel 341, a first gear 342, and a second gear 343;

[0110] The idler gear 341, the first gear 342 and the second gear 343 are all mounted on the mounting beam bracket 33;

[0111] The two sides of the idler gear 341 mesh with one side of the first gear 342 and one side of the second gear 343, respectively;

[0112] The other end of the elastic reset member 6 is rotatably connected to the mounting beam bracket 33 via an idler wheel 341.

[0113] In this embodiment, the idler wheel 341 has a shaft hole in its middle and is mounted on the mounting beam bracket 33 via a bearing. Its outer circumference is machined with teeth, and it meshes with the first gear 342 and the second gear 343 on both sides, forming transmission nodes. The elastic reset member 6 is connected to the idler wheel 341. When the V-frame 31 tilts, the elastic reset members 6 on both sides generate a difference in elastic force, pushing the idler wheel 341 to rotate around its axis. Since the idler wheel 341 meshes with both the first gear 342 and the second gear 343 simultaneously, its rotation will drive the gears on both sides to rotate synchronously in opposite directions. For example, if the V-frame 31 tilts to the left, the compression of the elastic reset member 6 on the right side increases, pushing the idler wheel 341 to rotate clockwise, which in turn drives the first gear 342 to rotate counterclockwise and the second gear 343 to rotate clockwise, forming a pair of opposing torques that act on the V-frame 31, causing it to rotate to the right around the pin 32, counteracting the leftward tilt. The linear force of the elastic reset member 6 is converted into rotational torque by the meshing of the idler wheel 341 with the first gear 342 and the second gear 343. When the V-shaped frame 31 tilts to the left or right, it can be automatically corrected by the idler wheel guide assembly 34 and the elastic reset member 6, thereby achieving posture correction and improving adjustment efficiency.

[0114] Please see Figure 1 In an optional embodiment, a counterweight 9 is provided at the bottom of the mounting base plate 1.

[0115] In this embodiment, the counterweight 9 is mostly a block or columnar metal component, which can be fixed to the bottom of the mounting base plate 1 opposite to the power-guided telescopic assembly 2 by bolts, and is symmetrically distributed with the V-shaped centering assembly 3. The counterweight 9 has a certain weight and is used to balance the device; the specific weight needs to be configured according to the overall balance requirements of the device. During the operation of the device, the counterweight 9 can counteract the off-center load torque generated when the V-shaped centering assembly 3 clamps the workpiece, reduce the vibration or tilting of the device during operation, prevent the device from overturning due to the shift of the center of gravity, and improve the safety of the device.

Claims

1. A positioning device for a ring-shaped workpiece, characterized in that, include: Mounting base plate, power-guided telescopic assembly, V-type centering assembly, pull rope encoder assembly, position switch, elastic reset component, and slewing support bearing; The power-guided telescopic assembly is fixed to the bottom of the mounting base plate, and one end of the power-guided telescopic assembly is connected to the V-shaped centering assembly. The power-guided telescopic assembly is used to drive the V-shaped centering assembly to perform horizontal linear displacement, and the V-shaped centering assembly is used to clamp the centering annular workpiece. The pull-cord encoder assembly is disposed at the bottom of the mounting base plate and connected to the V-shaped alignment assembly. The pull-cord encoder assembly is used to sense the offset and displacement of the V-shaped alignment assembly. The slewing support bearing is mounted on the mounting base plate, and the slewing support bearing is used to drive the mounting base plate to rotate and correct the offset direction of the V-shaped centering assembly; The V-shaped centering component is provided with the positioning switch at its open end. The positioning switch is used to position the annular workpiece. When the annular workpiece is aligned with the positioning switch in the forward direction, the slewing support bearing and the power guide telescopic component stop operating. The V-shaped centering assembly is provided with the elastic reset member, which is used to straighten the V-shaped centering assembly.

2. The positioning device according to claim 1, characterized in that, The V-shaped centering assembly includes a V-shaped frame, a pin shaft, a mounting beam bracket, and an idler wheel guide assembly. The bottom end of the V-shaped frame is rotatably connected to the middle part of the mounting beam bracket via the pin. The elastic reset element is installed on both sides of the V-shaped frame; One end of the elastic reset member is connected to the V-shaped frame, and the other end is rotatably connected to the mounting beam bracket through the idler wheel guide assembly; The mounting beam bracket is connected to one end of the power-guided telescopic assembly.

3. The positioning device according to claim 2, characterized in that, The positioning switch is located at the center of the open end of the V-shaped frame.

4. The positioning device according to claim 2, characterized in that, The draw-wire encoder assembly includes a draw-wire encoder and an encoder wire; The pull-cord encoder is installed at the bottom of the other end of the mounting base plate and is connected to the V-shaped centering assembly via the encoder wire.

5. The positioning device according to claim 1, characterized in that, The power-guided telescopic assembly includes a power-guided telescopic assembly and a guide assembly; The power telescopic assembly is installed at the bottom of the mounting base plate and connected to the V-shaped centering assembly. The power telescopic assembly is used to provide horizontal linear displacement for the V-shaped centering assembly. The guide component is arranged parallel to both sides of the power telescopic component, and one end of the guide component is connected to the V-shaped centering component. The guide component is used to guide the V-shaped centering component to move linearly.

6. The positioning device according to claim 5, characterized in that, The power telescopic assembly includes a motor, a lead screw, a nut, and a telescopic rod; One end of the lead screw is connected to the motor shaft of the motor; The nut is sleeved on the lead screw; The telescopic rod has a hollow structure. One end of the telescopic rod is fixedly connected to the nut, and the other end is connected to the V-shaped centering assembly.

7. The positioning device according to claim 5, characterized in that, The guiding assembly includes an optical axis and a linear bearing; The optical axis is arranged parallel to both sides of the power telescopic component, and one end of the optical axis is connected to the V-shaped centering component; The linear bearing is fixed to the mounting base plate and slidably connected to the optical axis.

8. The positioning device according to claim 2, characterized in that, The idler wheel guide assembly includes an idler wheel, a first gear, and a second gear; The idler wheel, the first gear, and the second gear are all mounted on the mounting beam bracket; The two sides of the idler gear mesh with one side of the first gear and one side of the second gear, respectively; The other end of the elastic reset member is rotatably connected to the mounting beam bracket via the idler wheel.

9. The positioning device according to claim 2, characterized in that, A touch sensor is provided on the inner side of the V-shaped frame.

10. The positioning device according to any one of claims 1 to 9, characterized in that, The bottom of the mounting base plate is equipped with a counterweight.

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