Rotating mechanism and grinding machine

Abstract

The invention discloses a rotating mechanism and a grinding machine, and belongs to the technical field of grinding machines. The rotating mechanism comprises a fixed table, an arc guide rail is installed on the fixed table, and the arc guide rail comprises a first movable end moving along an arc-shaped track; the rotary table is rotationally connected with the fixed table through a positioning shaft; the translation mechanism is installed on the fixed table and comprises a second movable end moving in the first direction, a first linear guide rail is installed on the second movable end, the first linear guide rail comprises a third movable end moving in the second direction, the third movable end is connected with the first movable end, and the third movable end is provided with a limiting shaft rotationally connected with the rotary table. The second direction is perpendicular to the first direction; the second movable end is configured to move in the first direction, and the third movable end drives the first movable end to move along the arc-shaped track, so that the rotary table rotates with the positioning shaft as a rotating shaft.

Description

Technical Field

[0001] This application relates to the field of grinding mill technology, and in particular to a rotating mechanism and a grinding machine. Background Technology

[0002] Key functional components play a crucial role in improving the overall performance of a machine tool. For grinding machines, such as vertical grinding machines, the grinding head assembly is typically mounted on a support frame via a rotating mechanism, which works in conjunction with the motion mechanism within the grinding head assembly to meet the machining requirements of different angles. Because the grinding head assembly usually includes a motion mechanism, its overall weight is relatively large. Rotating such a heavy grinding head assembly typically requires a large drive power for the rotating mechanism, resulting in high energy consumption and increased processing costs. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the related art.

[0004] Therefore, embodiments of this application provide a rotary mechanism and a grinding machine.

[0005] An embodiment of the first aspect of this application provides a rotating mechanism, comprising: a fixed platform, on which an arcuate guide rail is mounted, the arcuate guide rail including a first movable end that moves along an arcuate trajectory; a turntable, the turntable and the fixed platform being rotatably connected by a positioning shaft; and a translation mechanism mounted on the fixed platform, the translation mechanism including a second movable end that moves along a first direction, a first linear guide rail mounted on the second movable end, the first linear guide rail including a third movable end that moves along a second direction, the third movable end being connected to the first movable end, the third movable end being provided with a limiting shaft rotatably connected to the turntable, the second direction being perpendicular to the first direction; wherein the second movable end is configured to move along the first direction, and the third movable end drives the first movable end to move along an arcuate trajectory, so that the turntable rotates about the positioning shaft as the rotation axis.

[0006] For example, a second linear guide rail is also provided on the fixed platform. The second linear guide rail includes a fourth movable end that moves along a first direction and is connected to the second movable end.

[0007] For example, the second linear motion guide includes a roller linear guide, and / or the number of fourth moving ends is at least one.

[0008] For example, the rotating mechanism further includes a disc brake device disposed between the fixed platform and the turntable for locking the fixed platform and the turntable.

[0009] For example, a disc brake device includes a hydraulic brake and brake pads, the brake pads being connected to the side of the turntable facing the fixed platform, the hydraulic brake being mounted on the fixed platform, at least a portion of the brake pads being located between two caliper bodies of the hydraulic brake, the hydraulic brake being used to lock or release the brake pads; wherein the brake pads are annular and distributed around the circumference of the positioning shaft, and a plurality of hydraulic brakes are distributed around the circumference of the brake pads.

[0010] For example, the translation mechanism also includes a drive unit and a lead screw connected by a power connection. The drive unit is mounted on a fixed platform, and the two ends of the lead screw are rotatably connected to the fixed platform through a first bearing, and the second movable end is threadedly connected to the lead screw.

[0011] For example, the first linear guide is a split linear guide, which includes multiple first rails, and the third movable end is rotatably connected to the first rails.

[0012] For example, the arc guide rail includes an arc-shaped track set on a fixed platform, the arc-shaped track and the positioning shaft being coaxially arranged; the central angle of the arc-shaped track is less than or equal to 360°.

[0013] For example, a second bearing is provided on the turntable, and the positioning shaft is rotatably connected to the turntable through the second bearing.

[0014] An embodiment of the second aspect of this application provides a grinding machine, including: a support frame, a grinding head assembly, and a rotating mechanism of any of the foregoing, wherein a fixed table is connected to the support frame, and the grinding head assembly is connected to the rotary table.

[0015] The rotary mechanism and grinding machine provided in this application have the following advantages: 1. By using a translation mechanism in conjunction with a circular arc guide rail, a first linear guide rail, and a second linear guide rail, the rotation of the turntable relative to the fixed table can be achieved. The circular arc guide rail decomposes the force of the translation mechanism layer by layer, allowing a smaller driving power to drive the rotation of the heavy grinding head assembly. This achieves the effect of rotating large objects with a small drive, which helps reduce energy consumption and save processing costs.

[0016] 2. By utilizing multi-layered guide rails to decompose the force, the weight is free from axial force interference during movement, and only a portion of the overturning torque occurs during rotation, which is overcome by the linear guide rails, resulting in smooth rotation.

[0017] 3. Disc brakes utilize the principle of hydraulic clamping, with the central brake pads similar to those in a car's tire brakes. When the hydraulic brake is released, the brake pads can rotate freely within the clearance area. This rotation is unaffected by external forces, making it easier and requiring less driving force.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 A schematic diagram of the structure of a rotating mechanism provided in an embodiment of this application is shown; Figure 2 One of the partial structural schematic diagrams of the rotating mechanism provided in the embodiments of this application is shown; Figure 3 A second schematic diagram of a partial structure of the rotating mechanism provided in an embodiment of this application is shown; Figure 4 It shows Figure 3 A partially enlarged schematic diagram of point A in the illustrated embodiment.

[0020] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows: 100 Rotating mechanism, 110 Fixed platform, 120 Turntable, 130 Arc guide rail, 131 First movable end, 132 Arc track, 140 Translation mechanism, 141 Second movable end, 142 Drive unit, 143 Lead screw, 144 First bearing, 145 Coupling, 146 First connecting seat, 150 First linear guide rail, 151 Third movable end, 152 First track, 153 Second connecting seat, 160 Positioning shaft, 161 Second bearing, 170 Limiting shaft, 180 Second linear guide rail, 181 Fourth movable end, 182 Second track, 190 Disc brake device, 191 Brake pad, 192 Hydraulic brake. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0023] The following reference Figures 1 to 4 This application describes a rotary mechanism 100 and a grinding machine according to some embodiments. The rotary mechanism 100 is applied to a grinding machine, which can be a vertical grinding machine. The vertical grinding machine includes a support frame and a grinding head assembly. The rotary mechanism 100 connects the support frame and the grinding head assembly so that the grinding head assembly can rotate relative to the support frame, satisfying the requirements of tiltable follow-up grinding and increasing the processing range.

[0024] like Figure 1 , Figure 2 As shown, an embodiment of the first aspect of this application provides a rotating mechanism 100, including: a fixed platform 110, on which an arcuate guide rail 130 is mounted, the arcuate guide rail 130 including a first movable end 131 that moves along an arcuate trajectory; a turntable 120, the turntable 120 and the fixed platform 110 being rotatably connected by a positioning shaft 160; and a translation mechanism 140, mounted on the fixed platform 110, the translation mechanism 140 including a second movable end 141 that moves along a first direction, the second movable end 141 being mounted with a... A first linear guide 150 includes a third movable end 151 that moves along a second direction. The third movable end 151 is connected to a first movable end 131. The third movable end 151 is provided with a limiting shaft 170 that is rotatably connected to the turntable 120. The second direction is perpendicular to the first direction. The second movable end 141 is configured to move along the first direction, driving the first movable end 131 to move along an arc-shaped trajectory via the third movable end 151, so that the turntable 120 rotates about the positioning shaft 160. The first direction is as follows: Figure 1 As shown by arrow X in the image, the second direction is as follows: Figure 1 As shown by arrow Z in the diagram. Specifically, the first direction can be understood as the horizontal direction, and the second direction can be understood as the vertical direction.

[0025] The fixed table 110 is configured to connect with the support frame of the grinding machine to mount the entire rotating mechanism 100 onto the support frame. Specifically, the fixed table 110 and the support frame can be detachably connected to facilitate the disassembly and separation of the rotating mechanism 100 from the support frame for maintenance and parts replacement. Alternatively, the fixed table 110 and the support frame can be fixedly connected, such as by welding, to improve the reliability of the connection.

[0026] The rotary table 120 is configured to connect to the grinding head assembly of the grinding machine. Specifically, the grinding head assembly and the rotary table 120 can be detachably connected to facilitate disassembly and separation of the grinding head assembly and the rotary table 120 for maintenance and replacement of parts. Alternatively, the grinding head assembly and the rotary table 120 can be fixedly connected, such as by welding, to improve the reliability of the connection.

[0027] The rotating mechanism 100 provided in this embodiment includes a fixed platform 110, a turntable 120, and a translation mechanism 140. The turntable 120 and the fixed platform 110 are rotatably connected by a positioning shaft 160, allowing them to rotate around the positioning shaft 160. An arc-shaped guide rail 130 and the translation mechanism 140 are mounted on the fixed platform 110. A first linear guide rail 150 is mounted on the second movable end 141 of the translation mechanism 140. The third movable end 151 of the first linear guide rail 150 is connected to the first movable end 131 of the arc-shaped guide rail 130. A limiting shaft 170 connected to the turntable 120 is also provided on the third movable end 151. In this way, the second movable end 141 of the translation mechanism 140 moves relative to the fixed platform 110 along the first direction, which will drive the first linear guide rail 150 to move synchronously. Since the third movable end 151 of the first linear guide rail 150 is connected to the first movable end 131 of the arc guide rail 130 on the fixed platform 110, and the movement trajectory of the first movable end 131 is arc-shaped, the third movable end 151 will move along the second direction under the action of the first movable end 131 during the process of moving along the first direction with the second movable end 141, so as to compensate for the arc-shaped movement of the first movable end 131. Meanwhile, since the third movable end 151 is connected to the turntable 120 through the limiting shaft 170, the limiting shaft 170 changes along the first and second directions from the initial position as the third movable end 151 changes. As a result, the turntable 120 rotates about the positioning shaft 160, and the grinding head assembly on the turntable 120 rotates relative to the support frame. This can meet the follow-up grinding requirements of the tilt angle of the grinding head assembly on the turntable 120 and expand the application range of the grinding machine.

[0028] The rotating mechanism 100 provided in this embodiment of the application, through the cooperation of the translation mechanism 140, the arc guide rail 130, and the first linear guide rail 150, enables the rotation of the turntable 120 relative to the fixed table 110. The arc guide rail 130 decomposes the force of the translation mechanism 140 layer by layer, allowing a smaller driving power to drive the rotation of the heavy grinding head assembly. This achieves the effect of rotating large objects with a small drive, which helps reduce energy consumption and save processing costs. Specifically, the rotating mechanism 100 provided in this embodiment of the application can be applied to the rotation of heavy-duty box-type rotating parts weighing more than 4 tons, and has a wide range of applications.

[0029] Furthermore, the circular arc guide rail 130 enables the first movable end 131 to move along a specific arc-shaped curve path, achieving smooth curved motion and precise circular interpolation. This improves the motion performance and positioning accuracy of the first movable end 131, making it suitable for curved motion and, consequently, for the rotational motion of the turntable 120 and the fixed table 110.

[0030] like Figure 2As shown, in some possible embodiments provided in this application, the arc guide rail 130 includes an arc-shaped track 132 disposed on the turntable 120, and a first movable end 131 moves along the arc-shaped track 132. The first movable end 131 can be understood as a slider movable relative to the arc-shaped track 132.

[0031] The arc-shaped track 132 and the positioning shaft 160 are coaxially arranged so that the turntable 120 can rotate relative to the fixed platform 110 with the positioning shaft 160 as the axis of rotation under the action of the rotating mechanism 100.

[0032] The central angle of the arc track 132 is less than or equal to 360°. Custom designs are available to suit different working environments and load requirements. Specifically, a 360-degree arc track or an arc track segment of any degree can be selected as needed. For example... Figure 2 As shown, the central angle of the arc track 132 improved in this embodiment is less than or equal to 180°.

[0033] The radius of the arc-shaped track 132 can be equal to the distance between the positioning axis 160 and the limiting axis 170, or the radius of the arc-shaped track 132 can be greater than or less than the distance between the positioning axis 160 and the limiting axis 170. The relationship between the radius of the arc-shaped track 132 and the distance between the positioning axis 160 and the limiting axis 170 can be adjusted by appropriately setting the positions of the first movable end 131 and the limiting axis 170.

[0034] Furthermore, such as Figure 2 As shown, the arc-shaped guide rail 130 is mounted on the fixed platform 110, which can be understood as the arc-shaped track 132 being mounted on the fixed platform 110. Specifically, the arc-shaped track 132 and the fixed platform 110 can be separate structures, fixed to the fixed platform 110 by at least one method such as bolt structure, snap-fit ​​structure, tenon structure, magnetic structure, welding, etc. Alternatively, the arc-shaped track 132 and the fixed platform 110 can be an integral structure.

[0035] like Figure 2 and Figure 4 As shown, in some possible embodiments provided in this application, a second linear guide rail 180 is further provided on the fixed platform 110. The second linear guide rail 180 includes a fourth movable end 181 that moves along a first direction, and the fourth movable end 181 is connected to the second movable end 141. The provision of the second linear guide rail 180 plays a good guiding and limiting role in the movement of the second movable end 141 of the translation mechanism 140 along the first direction, which is conducive to improving the movement accuracy of the second movable end 141 along the first direction. At the same time, the second linear guide rail 180 can bear a part of the overturning torque, which is conducive to improving the flexibility and stability of the movement of the entire rotating mechanism 100.

[0036] Furthermore, the second linear motion guide rail includes a roller linear guide rail. By converting sliding friction into rolling friction, the roller linear guide rail effectively reduces the coefficient of friction, thereby greatly increasing the flexibility of the guide rail and making the components run more smoothly. This further improves the smoothness of the movement of the second movable end 141, which is beneficial to improving the smoothness of the rotation of the turntable 120 relative to the fixed table 110.

[0037] Specifically, such as Figure 4 As shown, the roller linear guide includes a fourth movable end 181 and a second track 182. The fourth movable end 181 and the second track 182 are in line contact. This contact method makes the pressure distribution more uniform under load, reduces local wear, and helps extend service life. The line contact method allows it to withstand greater loads and impacts than ball guides, while ensuring the stability and accuracy of the equipment during high-speed movement. Its low coefficient of friction allows it to push heavy objects more easily without generating excessive heat or wear, ensuring high-speed performance.

[0038] Furthermore, the number of fourth active terminals 181 is at least one, such as one, two, three, or more. Connecting the second active terminal 141 with multiple fourth active terminals 181 improves the reliability and stability of the connection between the fourth active terminal 181 and the second active terminal 141. Specifically, as... Figure 4 As shown, there are two fourth movable ends 181. Connecting the two fourth movable ends 181 to the second movable end 141 increases the engagement strength and improves the reliability of the connection. Specifically, the fourth movable end 181 can be a slider that moves along the second track 182.

[0039] In this embodiment, the translation mechanism 140, the arc guide rail 130, the first linear guide rail 150 and the second linear guide rail 180 work together to decompose the force using multi-layer guide rail steps. This reduces the interference of axial force on the turntable 120 during its movement and overcomes some of the overturning torque during its rotation. This greatly improves the stability of the rotation and helps to save energy and reduce operating costs.

[0040] like Figure 2 As shown, in some possible embodiments provided in this application, the rotating mechanism 100 further includes a disc brake device 190, disposed between the fixed platform 110 and the turntable 120, for locking the fixed platform 110 and the turntable 120. The disc brake device 190 locks the turntable 120 and the fixed platform 110 after the turntable 120 rotates relative to the fixed platform 110 to a specified angle, thereby ensuring a precise rotation angle.

[0041] like Figure 2As shown, in some possible embodiments provided in this application, the disc brake device 190 includes a hydraulic brake 192 and a brake pad 191. The brake pad 191 is connected to the side of the turntable 120 facing the fixed platform 110. The hydraulic brake 192 is mounted on the fixed platform 110. At least a portion of the brake pad 191 is located between the two calipers of the hydraulic brake 192. The hydraulic brake 192 is used to lock or release the brake pad 191.

[0042] Therefore, when the turntable 120 rotates to a specified angle relative to the fixed platform 110, the hydraulic brake 192 is activated to lock the brake pads 191, thereby locking the turntable 120 and the fixed platform 110 together.

[0043] Understandably, before the turntable 120 and the fixed table 110 rotate to the specified angle, the hydraulic brake 192 is in a relaxed state, and the brake pad 191 and the two clamps of the hydraulic brake 192 are in a floating design, that is, the brake pad 191 is located within the gap between the two clamps and can rotate freely. This rotation is not affected by other external forces, making rotation easier and requiring less driving force, which helps to further reduce energy consumption and save processing costs.

[0044] Specifically, the disc brake device 190 utilizes the clamping principle of a hydraulic caliper, with a brake pad 191 positioned between the two caliper bodies, similar to a car's tire brake. When the hydraulic caliper is in a relaxed state, the brake pad 191 can rotate freely within the clearance area, resulting in easier rotation and less driving force required, thus further reducing energy consumption and saving manufacturing costs. In contrast, related technologies that use a hydraulic cylinder to lock the brake pad require the hydraulic cylinder to remain constantly connected to the rotating brake pad. This necessitates the hydraulic cylinder to exert more driving force to move the brake pad 191 during rotation, leading to higher energy consumption.

[0045] Furthermore, brake pads 191 are distributed around the periphery of the positioning shaft 160, and the brake pads 191 are annular. Multiple hydraulic brakes 192 are distributed around the periphery of the brake pads 191. Therefore, the multiple hydraulic brakes 192 improve the reliability and uniformity of the brake pad locking, and enhance the reliability and stability of the locking of the turntable 120 and the fixed platform 110. Specifically, the multiple hydraulic brakes 192 can be evenly distributed around the periphery of the brake pads 191 to provide a larger clamping force.

[0046] Specifically, after the turntable 120 rotates to a designated position relative to the fixed platform 110, the disc brake device 190, controlled by the hydraulic system, locks and secures the turntable 120 and the fixed platform 110. For example... Figure 2 and Figure 3 As shown, the hydraulic pressure can be 50 bar, and the number of hydraulic brakes 192 can be 14, arranged symmetrically on the top and bottom, providing a strong clamping force.

[0047] like Figure 1 , Figure 2 and Figure 4 As shown, in some possible embodiments provided in this application, the translation mechanism 140 further includes a drive unit 142 and a lead screw 143 connected by a power connection. The drive unit 142 is mounted on the fixed platform 110, and both ends of the lead screw 143 are rotatably connected to the fixed platform 110 through a first bearing 144. The second movable end 141 is threadedly connected to the lead screw 143. Thus, when the drive unit 142 rotates, it drives the lead screw 143 to rotate. Since the second movable end 141 is threadedly connected to the lead screw 143, the second movable end 141 moves linearly along the lead screw 143, thereby converting the rotational motion of the lead screw 143 into the linear motion of the second movable end 141. This allows the second movable end 141 to move left and right along the first direction on the lead screw 143. The structure is simple and easy to implement.

[0048] The drive unit 142 can be a servo motor, and the lead screw 143 can be a ball screw. The drive unit 142 is connected to the lead screw 143 via a coupling 145. The two ends of the lead screw 143 are rotatably connected to the fixed platform 110 via first bearings 144, so that the two first bearings 144 are supported by the two ends of the lead screw 143. Specifically, the servo motor has sufficient power to move objects weighing more than 4 tons.

[0049] The lead screw 143 can be a high-precision ball screw, there are two second moving ends 141, and the first bearing 144 is a high-precision lead screw-specific bearing. Therefore, the translation mechanism 140 uses a double-nut high-precision ball screw to provide driving power, achieving a horizontal axis parallelism of 0.005mm and a lateral axis parallelism of 0.005mm. The use of high-precision lead screw-specific bearings at both ends effectively ensures coaxial accuracy of rotation and improves the smoothness of movement.

[0050] The second movable end 141 can be the first connecting base 146, or the second movable end 141 is connected to the first connecting base 146. Specifically, as shown... Figure 2 As shown, the first connecting seat 146 is connected to the second movable end 141. The first connecting seat 146 has three connections: the first connecting seat 146 is connected to the second movable end 141; the second movable end 141 is connected to the fourth movable end 181 of the second linear guide 180; and the second movable end 141 is connected to the first linear guide 150. Specifically, the first linear guide 150 includes a first track 152, which is mounted on the first connecting seat 146 to improve the Z-axis stiffness.

[0051] Furthermore, the drive unit 142, as the power mechanism of the entire rotating mechanism 100, can be connected to the encoder. By rationally designing the relationship between the rotation angle of the output shaft of the drive unit 142 and the rotation angle of the turntable 120 relative to the fixed platform 110, the encoder can be used to control the rotation angle of the turntable 120. Specifically, the turntable 120 provided in this embodiment can be controlled to rotate to any angle within a range of ±25° using the encoder, achieving high positioning accuracy. Specifically, the rotation accuracy can be determined by the Heidenhain circular encoder, which can rotate to any angle within a range of ±25° with an error controlled below 4" and high positioning accuracy. Here, "" represents a second, also known as an arcsecond or arcsecond, which is one-sixtieth of a minute, or one three-thousandth-six-hundredth of a degree.

[0052] Specifically, when the turntable 120 rotates to the designated position, the encoder's circular grating sends a signal to stop the drive unit 142 from working, at which point the rotation is complete. This achieves the rotation purpose without needing to calculate the horizontal movement distance.

[0053] like Figure 2 As shown, in some possible embodiments provided in this application, the first linear guide 150 is a split linear guide, and the structural design and material selection of the split linear guide enable it to withstand greater axial and radial loads.

[0054] The first linear guide 150 includes multiple first rails 152, and a third movable end 151 is rolledly connected to the first rails 152. Specifically, the third movable end 151 is connected to the first rails 152 via multiple rows of rolling elements. This design allows for even load distribution, maintaining excellent accuracy and stability even under heavy loads. It also prevents excessive deformation or displacement when moving heavy objects, ensuring smooth processing.

[0055] Specifically, the third movable end 151 can be the second connecting seat 153, or the third movable end 151 is connected to the second connecting seat 153. Specifically, as shown... Figure 2 As shown, the third movable end 151 is connected to the second connecting seat 153, the second connecting seat 153 is connected to the first movable end 131, and the limiting shaft 170 can be set on the second connecting seat 153 or the third movable end 151.

[0056] like Figure 2 As shown, in some possible embodiments provided in this application, a second bearing 161 is provided on the turntable 120, and the positioning shaft 160 is rotatably connected to the turntable 120 through the second bearing 161.

[0057] Among them, the second bearing 161 can be a high-precision centering bearing. A high-precision centering bearing is a key component used in mechanical equipment with high requirements for rotational accuracy. It plays a vital role in ensuring the rotational accuracy, speed, rigidity, temperature rise and noise of the machine tool, which is conducive to improving the processing quality of the workpiece.

[0058] Furthermore, the limiting shaft 170 can be rotatably connected to the turntable 120 via a third bearing.

[0059] The working principle of the rotating mechanism 100 is illustrated below with an example: like Figures 1 to 4 As shown, the drive unit 142 of the translation mechanism 140 rotates, driving the lead screw 143 to rotate, causing the second movable end 141 to move along the lead screw 143 towards... Figure 1 As shown, the leftward movement is caused by the second movable end 141 driving the fourth movable end 181 of the second linear guide 180 to move to the left along the second track 182. The second movable end 141 also drives the first linear guide 150 mounted on it to move to the left. Since the third movable end 151 of the first linear guide 150 is connected to the first movable end 131, and the first movable end 131 needs to move along the arc track 132 on the fixed platform 110, the third movable end 151 needs to move downwards to compensate for the movement of the first movable end 131. Because the turntable 120 is rotatably connected to the fixed platform 110 via the positioning shaft 160, and the turntable 120 is rotatably connected to the third movable end 151 via the limiting shaft 170, the turntable 120 rotates to the left relative to the fixed platform 110 about the positioning shaft 160 as the axis of rotation and the distance between the positioning shaft 160 and the limiting shaft 170 as the radius. It can be understood that when the drive unit 142 reverses, the second movable end 141 moves along the lead screw 143... Figure 1 Similarly, the rightward movement shown allows the rotary table 120 to rotate to the right relative to the fixed table 110, with the positioning axis 160 as the axis of rotation and the distance between the positioning axis 160 and the limit axis 170 as the radius. This causes the grinding head assembly mounted on the rotary table 120 to rotate relative to the fixed table 110, satisfying the requirements for tiltable follow-up grinding, increasing the processing range, and making it suitable for widespread application.

[0060] An embodiment of the second aspect of this application provides a grinding machine, including: a support frame, a grinding head assembly, and a rotating mechanism 100 of any of the foregoing embodiments. A fixed table 110 is connected to the support frame, and the grinding head assembly is connected to a rotary table 120. Since the grinding machine includes the rotating mechanism 100 of any of the foregoing embodiments, it has all the technical effects of the aforementioned rotating mechanism 100, which will not be described in detail here.

[0061] Furthermore, the grinding head assembly includes a motion mechanism and a grinding head. The motion mechanism connects the grinding head and the turntable 120. The motion mechanism is used to drive the grinding head to move relative to the turntable 120 in at least one direction to adjust the position of the grinding head relative to the turntable 120, thereby increasing the processing range of the grinding head.

[0062] The motion mechanism may include a horizontal motion mechanism and a vertical motion mechanism. The horizontal motion mechanism adjusts the relative position of the grinding head and the rotary table 120 along a first direction, and the vertical motion mechanism adjusts the relative position of the grinding head and the rotary table 120 along a second direction. It is understood that the motion mechanism may also include other mechanisms.

[0063] The rotating mechanism 100, translation mechanism 140, arc guide rail 130, first linear guide rail 150, second linear guide rail 180, fixed platform 110, and turntable 120 provided in this embodiment are rotatably connected via positioning shaft 160. When these five mechanisms work simultaneously, the third movable end 151 moves along the second direction while the second movable end 141 moves along the first direction, and the first movable end 131 and the limiting shaft 170 simultaneously rotate around the positioning shaft 160. The positioning shaft 160 can be understood as the B-axis, allowing the turntable 120 to rotate relative to the fixed platform 110 around the B-axis. The rotational accuracy can be determined by a Heidenhain circular encoder, allowing rotation within a ±25° range at any angle, resulting in high positioning precision. After rotating to the designated position, the hydraulic system controls the hydraulic brake 192 of the disc brake device 190 to fix the turntable 120 in place.

[0064] The improved rotary mechanism 100, as described in this embodiment, when assembled onto a grinding machine, exhibits an error of 2" at any angle within a ±25° rotation range during machine tool geometric accuracy testing. This falls within the scope of high-precision grinding. Furthermore, it enhances the overall precision of the machine tool, saves energy, and reduces processing costs, making it suitable for widespread application.

[0065] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In the description of this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating mechanism, characterized in that, include: A fixed platform, on which an arc-shaped guide rail is mounted, the arc-shaped guide rail including a first movable end that moves along an arc-shaped trajectory; A turntable, wherein the turntable and the fixed platform are rotatably connected by a positioning shaft; A translation mechanism is installed on the fixed platform. The translation mechanism includes a second movable end that moves along a first direction. A first linear guide rail is installed on the second movable end. The first linear guide rail includes a third movable end that moves along a second direction. The third movable end is connected to the first movable end. The third movable end is provided with a limiting shaft that is rotatably connected to the turntable. The second direction is perpendicular to the first direction. The second movable end is configured to move along the first direction, and the third movable end drives the first movable end to move along an arc-shaped trajectory, so that the turntable rotates around the positioning axis.

2. The rotating mechanism according to claim 1, characterized in that, The fixed platform is also provided with a second linear guide rail, which includes a fourth movable end that moves along a first direction and is connected to the second movable end.

3. The rotating mechanism according to claim 2, characterized in that, The second linear motion guide includes a roller linear guide; and / or, The number of the fourth active end is at least one.

4. The rotating mechanism according to claim 1, characterized in that, Also includes: A disc brake device is disposed between the fixed platform and the turntable, and is used to lock the fixed platform and the turntable.

5. The rotating mechanism according to claim 4, characterized in that, The disc brake device includes a hydraulic brake and a brake pad. The brake pad is connected to the side of the turntable facing the fixed platform. The hydraulic brake is mounted on the fixed platform. At least a portion of the brake pad is located between two calipers of the hydraulic brake. The hydraulic brake is used to lock or release the brake pad. The brake pads are annular and distributed around the circumference of the positioning shaft, and a plurality of hydraulic brakes are distributed around the circumference of the brake pads.

6. The rotating mechanism according to claim 1, characterized in that, The translation mechanism also includes a drive unit and a lead screw connected by a power connection. The drive unit is mounted on the fixed platform. The two ends of the lead screw are rotatably connected to the fixed platform through a first bearing, and the second movable end is threadedly connected to the lead screw.

7. The rotating mechanism according to claim 1, characterized in that, The first linear guide is a split linear guide, which includes multiple first tracks, and the third movable end is rotatably connected to the first track.

8. The rotating mechanism according to claim 1, characterized in that, The arc guide rail includes an arc-shaped track disposed on the fixed platform, and the arc-shaped track and the positioning shaft are coaxially disposed. The central angle of the arc track is less than or equal to 360°.

9. The rotating mechanism according to claim 1, characterized in that, A second bearing is provided on the turntable, and the positioning shaft is rotatably connected to the turntable through the second bearing.

10. A grinding machine, characterized in that, include: The support frame, the grinding head assembly, and the rotating mechanism as described in any one of claims 1 to 9, wherein the fixed platform is connected to the support frame and the grinding head assembly is connected to the rotary table.

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