A wheel bore circumferential radial positioning device and polishing apparatus

Abstract

The application discloses a kind of wheel inner hole circumferential radial positioning device and polishing equipment, it is related to wheel processing technical field, including fixed seat, concentric shaft system, execution end, the fixed seat is connected in bearing seat one side, concentric shaft system is installed in bearing seat other side;The first drive mechanism and the second drive mechanism are symmetrically equipped in bearing seat two sides, the first drive mechanism is connected with concentric shaft system by first transmission mechanism, the second drive mechanism is connected with concentric shaft system by second transmission mechanism;Concentric shaft system is rotatably connected with radial drive wheel, radial drive wheel is engaged with execution end, the first drive mechanism is used to provide the rotary power of execution end, the second drive mechanism is used to provide the radial displacement of execution end.The present application can be in the narrow space range of wheel inner hole, realize execution end to do different diameter circumferential motion simultaneously, always accurate positioning to inner hole surface along radial direction, to improve polishing precision.

Description

Technical Field

[0001] This invention relates to the field of wheel processing technology, and in particular to a radial positioning device and grinding equipment for the inner bore of a wheel. Background Technology

[0002] To ensure stable lubrication during wheel pressing, the inner bore of the wheel needs to be ground before pressing. Currently, manual grinding is commonly used, where a person holds a grinding tool and moves it in a circular motion while simultaneously pressing the tool radially against the inner bore surface to grind it. This method has drawbacks, including high manual labor intensity, poor on-site grinding environment, and the grinding condition of the workpiece being greatly affected by the operator's condition.

[0003] In some existing technologies, multi-axis robots or other mechanical structures are used. The aforementioned automated grinding equipment all employ interpolation to simulate circular motion. However, this method cannot achieve accurate radial positioning of the actuator, and uneven grinding force can occur due to differences in hub hole diameter or non-ideal circumferential conditions. This uneven grinding force leads to variations in the actual surface finish, ultimately affecting the stability of the wheel pressing process. Furthermore, currently commercially available constant force devices are all unidirectional constant force output units, which cannot consistently apply grinding pressure radially in a constantly changing direction during wheel inner hole grinding. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an automatic variable diameter wheel inner hole circumferential radial positioning device and inner hole grinding equipment. This device can achieve accurate radial positioning of the inner hole surface while the actuator performs circumferential movements of different diameters within the narrow space of the wheel inner hole, thereby improving grinding accuracy.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a radial positioning device for the inner bore of a wheel, comprising a fixed seat, a concentric shaft system, and an actuating end. The fixed seat is connected to one side of a bearing seat, and the concentric shaft system is mounted on the other side of the bearing seat. A first driving mechanism and a second driving mechanism are symmetrically arranged on both sides of the bearing seat. The first driving mechanism is connected to the concentric shaft system through a first transmission mechanism, and the second driving mechanism is connected to the concentric shaft system through a second transmission mechanism. A radial driving wheel is rotatably connected to the concentric shaft system, and the radial driving wheel meshes with the actuating end. The first driving mechanism is used to provide rotational power to the actuating end, and the second driving mechanism is used to provide radial displacement to the actuating end.

[0006] As a further implementation, the actuator is equipped with a wire encoder, which is used to detect the lateral movement distance of the actuator relative to the concentric gear train in real time.

[0007] As a further implementation, the actuator includes a driven frame, which has a through cavity, and a rack is installed on the inner wall of the through cavity; the rack meshes with a radial drive wheel.

[0008] As a further implementation, the concentric shaft system includes a hollow shaft, a bearing housing is installed at one end of the hollow shaft, and the other end of the hollow shaft is connected to an outlet flange; The outlet flange is in sliding fit with the driven frame.

[0009] As a further implementation, flanges are provided on both sides of the outlet flange, and the flanges cooperate with the limiting groove, which is fixed to the lower side of the driven frame.

[0010] As a further implementation, the execution end also includes a vertical plate and a horizontal plate, the driven frame is connected to the horizontal plate through the vertical plate, and the horizontal plate is arranged parallel to the lower side of the driven frame.

[0011] As a further implementation, both the first and second transmission mechanisms adopt synchronous belt transmission mechanisms, wherein the driving synchronous belt pulley in the synchronous belt transmission mechanism is installed at the output end of the first and second drive mechanisms, and the driven synchronous belt pulley is installed on a concentric shaft system.

[0012] As a further implementation, the driven synchronous pulley in the first transmission mechanism is interference-fitted with the concentric shaft system, and the driven synchronous pulley in the second transmission mechanism is fixedly connected to the radial drive wheel.

[0013] As a further implementation, the first drive mechanism and the second drive mechanism respectively include a servo motor and a reducer connected to the servo motor.

[0014] Secondly, the present invention also provides a wheel inner hole grinding device, including the aforementioned circumferential radial positioning device.

[0015] As a further implementation, it also includes an external mobile device and an external working device, wherein the external mobile device is connected to the fixed base and the external working device is connected to the execution end.

[0016] The beneficial effects of the present invention are as follows: (1) The circumferential radial positioning device of the present invention has a set of driving mechanisms on each side of the concentric shaft system. The driving mechanisms are connected by a transmission mechanism. The concentric shaft system is rotatably connected to a radial driving wheel. The radial driving wheel meshes with the execution end. The first driving mechanism provides the rotational power of the execution end, and the second driving mechanism provides the radial displacement of the execution end. It realizes the coordinated driving of the circumferential and radial motion of the execution mechanism in a compact space, so that the execution end can make different diameter circumferential motions while always accurately positioning itself to the inner hole surface in the radial direction. It can realize automatic diameter change of the execution end for different models of wheel inner hole sizes.

[0017] (2) The present invention designs two sets of drive mechanisms to provide rotational power and radial diameter change power respectively; wherein, a hollow shaft is used as the main rotation axis and is driven to rotate by the first drive mechanism to realize the overall circumferential motion of the execution end; at the same time, a radial drive wheel that can rotate relative to each other is installed on the hollow shaft and is driven by the second drive mechanism to form a coaxial differential transmission to provide power for radial diameter change; according to the different transmission ratios of the two sets of drive mechanisms, the rotation speed of the two sets of drive mechanisms is precisely controlled to achieve the radial positioning while the execution end makes circumferential motion when the two sets of drive mechanisms are relatively stationary.

[0018] (3) The actuator of the present invention is equipped with a wire encoder, which can detect the lateral movement distance of the actuator relative to the outlet flange in real time, thereby controlling the distance between the actuator and the inner hole surface of the wheel to remain constant. It can be used in conjunction with the control system to adjust the radial feed in real time, so that the actuator can accurately and stably fit the inner hole surface, thereby achieving precise positioning in the radial direction. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative examples and descriptions of the invention are used to explain the invention and do not constitute an undue limitation of the invention.

[0020] Figure 1 This is a schematic diagram of the circumferential radial positioning device for the inner hole of a wheel according to one or more embodiments of the present invention. Figure 2 This is a schematic diagram of the drive device structure according to one or more embodiments of the present invention; Figure 3 This is a schematic diagram of the concentric shaft system structure according to one or more embodiments of the present invention; Figure 4 This is a cross-sectional view of the concentric shaft system according to one or more embodiments of the present invention; Figure 5 This is a schematic diagram of the execution end structure according to one or more embodiments of the present invention.

[0021] The components are as follows: 1. Fixed base; 2. Connecting body; 3. First drive mechanism; 4. Second drive mechanism; 5. Concentric shaft system; 6. Actuating end; 7. First synchronous belt; 8. Second synchronous belt; 9. Servo motor; 10. Reducer; 11. First active synchronous pulley; 12. Rotary joint; 13. Bearing housing; 14. Rolling bearing; 15. Hollow shaft; 16. First driven synchronous pulley; 17. Second driven synchronous pulley; 18. Radial drive wheel; 19. Outlet flange; 20. Bearing; 21. Driven frame; 22. Limiting groove; 23. Vertical plate; 24. Wire encoder; 25. Horizontal plate; 26. Rack; 27. Flange flange. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] For ease of description, the terms "upper," "lower," "left," and "right" appearing in this invention only indicate that they correspond to the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and do not indicate or imply that the device or component 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. In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Example 1: The inner diameter of wheels is relatively small, typically φ170mm~φ212mm. Current automated wheel bore grinding methods cannot achieve accurate radial positioning of the actuator 6, affecting grinding precision. Furthermore, during wheel bore grinding, some constant force devices cannot consistently apply grinding pressure radially in a constantly changing direction. Therefore, this embodiment provides a wheel bore circumferential radial positioning device for connecting external mobile devices (e.g., robots) and external working devices (e.g., unidirectional constant force output units). The circumferential radial positioning device, in conjunction with the external mobile and working devices, completes constant force grinding of the wheel bore.

[0025] like Figure 1As shown, the wheel inner hole circumferential radial positioning device of this embodiment includes two sets of drive mechanisms, namely the first drive mechanism 3 and the second drive mechanism 4. The first drive mechanism 3 is used to drive the execution end 6 to move in a circular motion, and the second drive mechanism 4 is used to drive the execution end 6 to move horizontally. Thus, a controllable circular motion is generated through one set of drive mechanisms, and a horizontal motion matching the first set of drive mechanisms is generated through the other set of drive mechanisms, so that the execution end 6 always extends and retracts radially during the circular motion.

[0026] Specifically, such as Figure 1 As shown, the wheel inner hole circumferential radial positioning device of this embodiment includes a fixed base 1, a first drive mechanism 3, a second drive mechanism 4, a concentric shaft system 5, a first transmission mechanism, a second transmission mechanism, and an execution end 6. The fixed base 1 is used to connect to the interface of an external mobile device (such as a robotic arm). The concentric shaft system 5 is coaxially mounted with the fixed base 1. The first drive mechanism 3 and the second drive mechanism 4 are symmetrically arranged with respect to the fixed base 1. The first drive mechanism 3 is connected to the concentric shaft system 5 through the first transmission mechanism, and the second drive mechanism 4 is connected to the concentric shaft system 5 through the second transmission mechanism. The execution end 6 is installed at the end of the concentric shaft system 5. Under the combined action of the first drive mechanism 3, the second drive mechanism 4, and the concentric shaft system 5, it realizes circumferential motion while providing radial displacement for external working equipment.

[0027] The first driving mechanism 3 and the second driving mechanism 4 have the same structure. In this embodiment, as shown... Figure 2 As shown, both the first drive mechanism 3 and the second drive mechanism 4 include a drive motor and a reducer 10 connected in sequence. The first transmission mechanism and the second transmission mechanism adopt a synchronous belt mechanism, which has high transmission accuracy, smooth operation, and low noise, and can achieve precise motion transmission.

[0028] The first transmission mechanism includes a first synchronous belt 7, a first driving synchronous pulley 11, and a first driven synchronous pulley 16. The second transmission mechanism includes a second synchronous belt 8, a second driving synchronous pulley, and a second driven synchronous pulley 17. The first driving synchronous pulley 11 and the second driving synchronous pulley are mounted on the reducer 10 shaft in the corresponding drive mechanism. The first driven synchronous pulley 16 and the second driven synchronous pulley 17 are installed sequentially along the concentric shaft system 5, which allows the two driven synchronous pulleys to share the same axis, reducing the axial space occupied by the device, while ensuring the coaxiality of the movement of the two driven synchronous pulleys, further improving the transmission smoothness and structural reliability.

[0029] It is understood that in other embodiments, the first and second transmission mechanisms may also be implemented using other structures, such as a sprocket drive mechanism.

[0030] like Figure 3 and Figure 4As shown, the concentric shaft system 5 includes a hollow shaft 15, one end of which is connected to a rotary joint 12, and the other end is connected to an outlet flange 19. A bearing seat 13 is installed on the outer side of the connection end between the hollow shaft 15 and the rotary joint 12. A rolling bearing 14 is installed inside the bearing seat 13. The concentric shaft system 5 is connected to the fixed seat 1 and the connecting body 2 through the bearing seat 13. The bearing seat 13 is fixed at the middle position on the upper side of the connecting body 2. The first drive mechanism 3 and the second drive mechanism 4 are respectively arranged on the left and right sides of the fixed seat 1. The rotary joint 12 can be selected according to engineering needs (such as connecting compressed gas or power). After being connected to the hollow shaft 15, it converts the fixed energy input into a dynamic output that rotates with the hollow shaft 15.

[0031] With the mounting end of the fixed base 1 as the upper side, the first driven synchronous pulley 16 is arranged above the second driven synchronous pulley 17, and a radial drive wheel 18 is provided on the lower side of the second driven synchronous pulley 17. In this embodiment, the first driven synchronous pulley 16 and the hollow shaft 15 are fixed relative to each other by an interference fit key connection. The second driven synchronous pulley 17 and the radial drive wheel 18 are connected as one unit by screws and locating pins, and are connected to the hollow shaft 15 by a bearing 20. The outlet flange 19 is installed on the shaft end of the hollow shaft 15 by screws and locating pins to press the bearing 20, and can rotate together with the hollow shaft 15. In this embodiment, the bearing 20 is an engineering plastic bearing 20, which has the advantages of light weight, ability to absorb vibration and shock, and excellent self-lubricating performance.

[0032] like Figure 5 As shown, the actuator 6 includes a driven frame 21, a vertical plate 23, a horizontal plate 25, a wire encoder 24, etc. The driven frame 21 is installed on the outside of the radial drive wheel 18. The driven frame 21 is connected to the horizontal plate 25 through two vertical plates 23. The vertical plates 23 are symmetrically arranged on the left and right sides of the driven frame 21. The horizontal plate 25 is located below the driven frame 21 and is parallel to it. In this embodiment, the driven frame 21 is a rectangular frame structure with a through cavity on its inner side. A rack 26 is provided on the inner wall of one side of the through cavity, and the rack 26 meshes with the radial drive wheel 18.

[0033] A limiting groove 22 is provided on the lower side of the rack 26, and the limiting groove 22 extends in the left and right directions (lateral direction). The closed end of the limiting groove 22 is fixed to the inner wall of the vertical plate 23, and the open end is slidably engaged with the outlet flange 19. In this embodiment, two limiting grooves 22 are provided to ensure movement stability. When the outlet flange 19 rotates under the drive of the hollow shaft 15, it can drive the limiting groove 22 to rotate. In order to adapt to the structure of the limiting groove 22, long strip flanges 27 are provided on both sides of the outlet flange 19. The flanges 27 are inserted into the open end of the limiting groove 22. Under the push of the radial drive wheel 18, the limiting groove 22 slides along the flanges 27 on both sides of the outlet flange 19, so that the actuator 6 moves laterally as a whole, and the flanges 27 bear the weight of the actuator 6 to prevent the actuator 6 from falling.

[0034] like Figure 5 As shown, a wire encoder 24 is fixed on the upper surface of the horizontal plate 25. One end of the wire connector is connected to the outlet flange 19, which can detect the lateral movement distance of the actuator 6 relative to the outlet flange 19 in real time, thereby controlling the distance between the actuator 6 and the inner surface of the wheel bore to remain constant. Since the wire encoder 24 collects the radial displacement signal of the actuator 6 relative to the outlet flange 19 in real time, forming a position closed-loop feedback, it can cooperate with the control system to adjust the radial feed in real time, so that the actuator 6 accurately and stably fits the inner surface of the bore, thereby achieving precise positioning in the radial direction.

[0035] This embodiment designs two sets of drive mechanisms to provide rotational power and radial diameter change power respectively. The hollow shaft 15 is used as the main rotation axis and is driven to rotate by the first drive mechanism 3 to realize the overall circumferential motion of the actuator 6. At the same time, a radial drive wheel 18 that can rotate relative to the hollow shaft 15 is installed on it and is driven independently by the second drive mechanism 4 to form a coaxial differential transmission, which provides power for radial diameter change.

[0036] Therefore, this embodiment takes into account the small space of the wheel's inner hole and designs a compact wheel inner hole circumferential radial positioning device to achieve coordinated driving of circumferential and radial motion within a compact space. By controlling the speed ratio of the first drive mechanism and the second drive mechanism, it can be ensured that the lateral movement of the actuator 6 is always along the radial direction of the circumferential motion during the circumferential motion, thereby driving the external working equipment (such as a unidirectional constant force unit) to always move along the radial direction during the circumferential motion.

[0037] This embodiment can automatically change the diameter of the actuator 6 for different models of wheel inner hole sizes, and accurately position it radially to the surface of the wheel inner hole during circumferential motion.

[0038] Example 2: This embodiment provides a wheel inner hole grinding device, including the wheel inner hole circumferential radial positioning device described in Embodiment 1, and further including an external mobile device (e.g., a robot), an external working device (e.g., a unidirectional constant force output unit), and a control system. The external mobile device is connected to the fixed base 1, and the execution end 6 is connected to the external working device. The first drive mechanism 3 drives the concentric shaft system 5 to perform circumferential rotation, providing a circumferential grinding trajectory for the external working device; the second drive mechanism 4 drives the radial drive wheel 18 to rotate, and through the meshing of the gear and rack 26, drives the execution end 6 to extend outward along the radial guide structure of the outlet flange 19 until the external working device abuts against the surface of the wheel inner hole.

[0039] During the grinding process, the wire encoder 24 detects the radial displacement of the actuator 6 in real time and feeds it back to the control system. By adjusting the output of the second drive mechanism 4, the actuator 6 is always adaptively positioned in the radial direction and presses against the inner surface of the wheel hole, maintaining a constant radial force and grinding distance.

[0040] Under the coordinated control of the first drive mechanism 3 and the second drive mechanism 4, the external working equipment moves in a circular motion along the concentric shaft system 5 while automatically changing its diameter in the radial direction, thereby achieving continuous, uniform and stable grinding operations in the circumferential direction of the inner hole of the wheel.

[0041] This embodiment solves the problem of grinding wheels of various models and diameters in a limited space, and can improve the level of wheel grinding.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A radial positioning device for the inner bore of a wheel, characterized in that, The device includes a fixed base, a concentric shaft system, and an actuator. The fixed base is connected to one side of a bearing housing, and the concentric shaft system is mounted on the other side of the bearing housing. A first drive mechanism and a second drive mechanism are symmetrically arranged on both sides of the bearing housing. The first drive mechanism is connected to the concentric shaft system through a first transmission mechanism, and the second drive mechanism is connected to the concentric shaft system through a second transmission mechanism. A radial drive wheel is rotatably connected to the concentric shaft system, and the radial drive wheel meshes with the actuator. The first drive mechanism is used to provide rotational power to the actuator, and the second drive mechanism is used to provide radial displacement to the actuator.

2. The radial positioning device for the inner bore of a wheel according to claim 1, characterized in that, The actuator is equipped with a wire encoder, which is used to detect the lateral movement distance of the actuator relative to the concentric gear train in real time.

3. A radial positioning device for the inner bore of a wheel according to claim 1 or 2, characterized in that, The actuator includes a driven frame, which has a through cavity, and a rack is installed on the inner wall of the through cavity; the rack meshes with a radial drive wheel.

4. The radial positioning device for the inner bore of a wheel according to claim 3, characterized in that, The concentric shaft system includes a hollow shaft, a bearing housing is installed at one end of the hollow shaft, and the other end of the hollow shaft is connected to an outlet flange; The outlet flange is in sliding fit with the driven frame.

5. A radial positioning device for the inner bore of a wheel according to claim 4, characterized in that, The outlet flange is provided with flanges on both sides, and the flanges cooperate with the limiting grooves, which are fixed to the lower side of the driven frame.

6. A radial positioning device for the inner bore of a wheel according to claim 3, characterized in that, The actuator also includes a vertical plate and a horizontal plate. The driven frame is connected to the horizontal plate through the vertical plate, and the horizontal plate is arranged parallel to the lower side of the driven frame.

7. A radial positioning device for the inner bore of a wheel according to claim 1, characterized in that, Both the first and second transmission mechanisms adopt synchronous belt drive mechanisms. In the synchronous belt drive mechanism, the driving synchronous pulley is installed at the output end of the first and second drive mechanisms, and the driven synchronous pulley is installed on the concentric shaft system.

8. A radial positioning device for the inner bore of a wheel according to claim 7, characterized in that, The driven synchronous pulley in the first transmission mechanism is interference-fitted with the concentric shaft system, and the driven synchronous pulley in the second transmission mechanism is fixedly connected to the radial drive wheel.

9. A radial positioning device for the inner bore of a wheel according to claim 1, characterized in that, The first drive mechanism and the second drive mechanism respectively include a servo motor and a reducer connected to the servo motor.

10. A wheel inner hole grinding device, characterized in that, Includes the circumferential radial positioning device as described in any one of claims 1-9.

11. The wheel inner hole grinding equipment according to claim 10, characterized in that, It also includes an external mobile device and an external working device, wherein the external mobile device is connected to a fixed base and the external working device is connected to an execution end.

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