Double-sided grinder for plane slewing bearing

Abstract

This invention relates to the field of double-end grinding machine technology, specifically disclosing a double-end grinding machine with a planar rotary bearing, comprising: an upper fixed plate, a lower fixed plate, and two grinding discs; further comprising: multiple planetary wheels, located between the two grinding discs, for placing workpieces, capable of rotating relative to the lower fixed plate and revolving around the axis of the lower fixed plate; a clamping rod, capable of rotating relative to the planetary wheels, with a rotating shaft fixedly connected to the clamping rod, the rotating shaft being rotatably mounted on the inner wall of the planetary wheels, and a torsion spring provided between the rotating shaft and the inner wall of the planetary wheels; a right-angle bracket provided at the end of the clamping rod away from the rotating shaft, the right-angle bracket being capable of rotating relative to the clamping rod, and a torsion spring also provided between the right-angle bracket and the clamping rod; the double-end grinding machine with a planar rotary bearing of this invention, through multiple sets of adaptively adjustable clamping rods cooperating with clamping gear rings, gears, and right-angle brackets and other transmission structures, can adapt to irregularly shaped workpieces and workpieces with different vertical diameters, saving the cost of custom-made special fixtures.

Description

Technical Field

[0001] This invention relates to the field of double-end grinding machine technology, and more specifically to a double-end grinding machine with a planar rotary bearing. Background Technology

[0002] Double-end grinding machines are core equipment for achieving high-precision parallelism and surface roughness machining of both ends of workpieces, and are widely used in automotive parts, hydraulic components, medical device accessories, and other fields. With the increasing demand from downstream industries for diverse component structures, the processing requirements for irregularly shaped workpieces (such as non-circular cross-sections and irregular contours) and workpieces with different vertical diameters (such as stepped shafts and frustum-shaped parts) have increased significantly. However, the double-end grinding operation of these workpieces faces a severe bottleneck in clamping technology.

[0003] Currently, most mainstream double-end grinding machine clamping mechanisms are based on standardized workpiece designs, using fixed molds or rigid chucks for positioning. They rely on the regular shape of the workpiece for positioning, requiring customized fixtures for different irregularly shaped workpieces. This not only increases equipment investment costs and changeover time, but also requires strict alignment of the workpiece with the fixture positioning reference when placing it. Even slight deviations can lead to clamping offset, resulting in excessive parallelism of the ground end face. For workpieces with different vertical diameters, such as stepped or conical shapes, the grippers of traditional clamping mechanisms are mostly rigid fixed structures that can only fit against a certain radial section of the workpiece, unable to adapt to changes in vertical dimensions, resulting in poor clamping adaptability and insufficient stability. Summary of the Invention

[0004] This invention provides a double-end face grinder for a planar rotary bearing, aiming to solve the problems of poor clamping adaptability and insufficient stability when grinding the double-end faces of irregularly shaped workpieces and workpieces with different vertical diameters in related technologies.

[0005] This invention discloses a double-end face grinding machine with a planar rotary bearing, comprising: an upper fixed plate, a lower fixed plate, and two grinding discs. The two grinding discs are respectively located inside the upper and lower fixed plates and above and below the workpiece. The two grinding discs are capable of rotating relative to the lower fixed plate. A planar rotary bearing is disposed between the lower grinding disc and the lower fixed plate. The machine also includes:

[0006] Multiple planetary wheels are provided and located between two grinding discs. They are used to place workpieces and can rotate relative to the lower fixed disc and revolve around the axis of the lower fixed disc.

[0007] The clamp rod is rotatable relative to the planet wheel. A rotating shaft is fixedly connected to the clamp rod. The rotating shaft is rotatably mounted on the inner wall of the planet wheel, and a torsion spring is provided between the rotating shaft and the inner wall of the planet wheel.

[0008] A right-angle bracket is provided at the end of the clamping rod away from the pivot. The right-angle bracket can rotate relative to the clamping rod, and a torsion spring is also provided between the right-angle bracket and the clamping rod.

[0009] The locking wheel is fixedly connected to the rotating shaft and can rotate with the rotating shaft. Two symmetrically arranged brake levers are provided on one side of the locking wheel, which can rotate relative to the planetary wheel and limit the rotation of the locking wheel.

[0010] The lifting block is slidably connected inside the planetary wheel, and can slide vertically relative to the planetary wheel. It can also push the two brake levers towards the locking wheel during descent.

[0011] The above technical solution enables efficient and precise workpiece clamping and grinding. During workpiece clamping, the lifting block slides downwards, pushing the two brake levers towards the locking wheel and pressing them against its circumference, restricting the locking wheel's rotation. At this time, the clamping rod and right-angle bracket remain clamped under the preload of the torsion spring. The brake levers ensure that the clamping rod will not move during grinding, ensuring workpiece stability during processing. During grinding, the two grinding discs rotate towards each other. The planetary wheel drives the workpiece to revolve around the axis of the lower fixed disc, while the workpiece rotates with the planetary wheel, allowing the upper and lower end faces of the workpiece to contact the grinding discs evenly, achieving synchronous grinding of both end faces. The planar rotary bearing effectively reduces the frictional resistance when the lower grinding disc rotates, improving the stability and service life of the equipment.

[0012] Preferably, the planetary wheel is provided with a meshing gear ring on its outer side, the outer edge of the top of the lower fixed disk is provided with an outer lifting column in a circumferential array, and the inner side of the grinding disc inside the lower fixed disk is provided with an inner rotating column in a circumferential array. The meshing gear ring can mesh with both the outer lifting column and the inner rotating column at the same time.

[0013] By adopting the above technical solution, when the inner rotating column rotates with the lower grinding disc, it can drive the planetary wheel to revolve stably around the axis of the lower fixed disc through the meshing gear ring. The outer lifting column can be vertically raised and lowered during the start-up and shutdown of the grinding machine or during the loading and unloading of workpieces to adjust the meshing state with the meshing gear ring. When the outer lifting column descends, it is convenient for the operator to adjust the position of the planetary wheel or complete the workpiece loading and unloading operations. When the outer lifting column rises, it re-meets with the meshing gear ring, ensuring that the planetary wheel's revolution trajectory is accurate and controllable during the processing. This double-meshing structure, combined with the planetary wheel's own rotation, enables the workpiece to obtain uniform and sufficient grinding contact between the two grinding discs, effectively improving the flatness, parallelism, and dimensional consistency of the double-end surface processing of the planar rotary bearing.

[0014] Preferably, the planetary wheel has a plurality of workpiece slots for placing workpieces inside, each workpiece slot corresponds to at least three clamping rods, and the inner wall of the workpiece slot has a clamping groove for the clamping rods to extend out and clamp the workpiece.

[0015] Preferably, the planetary wheel has two T-shaped adjustment slots on its top, and an adjustment rod is slidably connected in the adjustment slot. A knob is screwed onto the adjustment rod. A turntable and a ring are rotatably installed inside the planetary wheel. The two adjustment rods are fixedly connected to the turntable and the ring, respectively. Rotating the adjustment rod can drive the turntable or the ring to rotate synchronously. Rotating the knob can fix the position of the adjustment rod in the adjustment slot.

[0016] By adopting the above technical solution, operators can drive the turntable or ring to rotate by rotating the corresponding adjustment rods, thereby flexibly adjusting the distribution angle or clamping distance of the clamping rods in the workpiece slot to adapt to planar rotary bearing workpieces with different outer and inner diameter specifications. Rotating the knob can quickly lock the position of the adjustment rods, ensuring the stability of the turntable and ring posture during processing, avoiding clamping deviation caused by grinding vibration, and ensuring the positioning accuracy of the workpiece during double-end grinding. This adjustable clamping adaptation structure not only broadens the processing range of the grinding machine for different workpieces, but also simplifies the parameter adjustment process before workpiece clamping, effectively improving the versatility of the equipment and production efficiency.

[0017] Preferably, the planetary wheel has multiple clamping gear rings and fixed gear rings rotatably mounted inside. The outer ring of the clamping gear ring meshes with the turntable, and the outer ring of the fixed gear ring meshes with the rotating ring. A gear is fixedly connected to the rotating shaft, and the gear meshes with the inner ring of the clamping gear ring. When the turntable rotates, it can drive the gear and the rotating shaft to rotate through the clamping gear ring.

[0018] Preferably, the right-angle bracket is provided with rubber cams at both ends, and the rubber cams can fit in contact with the surface of the workpiece.

[0019] Preferably, one end of the brake lever is fixedly connected to a transmission rod, a push plate is rotatably installed at the connection between the brake lever and the transmission rod, and a spring is provided between the two transmission rods. The spring can make the two transmission rods fit together in the initial state, and can drive the brake lever to rotate in the direction of the locking wheel when the transmission rods move away from each other.

[0020] Preferably, a braking part is provided at the end of the brake lever near the locking wheel. The braking part has a beveled structure. The braking parts of the two brake levers can respectively restrict the forward and reverse rotation of the locking wheel. Damping material is provided on the surface of the locking wheel and the surface of the braking part. The damping material can increase the friction between the braking part and the locking wheel.

[0021] By adopting the above technical solution, the operator can drive the two transmission rods to overcome the elastic force of the spring plates and move them away from each other by lowering the push plate, thereby driving the brake rods on both sides to rotate synchronously towards the locking wheel. Since the oblique ridge structure of the two brake parts corresponds to the forward and reverse rotation directions of the locking wheel respectively, combined with the friction-increasing effect of the damping material, the bidirectional rotation of the locking wheel can be effectively restricted. This braking structure is not only easy to operate, requiring only the push plate to be lowered to complete the locking action, but also has a stable and reliable locking effect, further ensuring the accuracy of workpiece clamping during the grinding process.

[0022] Preferably, the lifting block is provided with unfolding ramps on both sides and a pushing ramp at the bottom. When the lifting block descends, the unfolding ramps can first push the transmission rods away from each other, and the pushing ramps can then push the push plate to move towards the locking wheel. A straight rod is fixedly connected to the lifting block, and a groove is opened on the fixed gear ring. The straight rod passes through the groove. When the fixed gear ring rotates, it can drive the lifting block to slide vertically through the groove and the straight rod.

[0023] Preferably, a hollow frame is slidably connected to the bottom of the push plate. The hollow frame is fixedly installed inside the planetary wheel. A spring is provided between the hollow frame and the push plate. The spring can pull the push plate to reset when the lifting block moves upward, so that the brake rod moves away from the locking wheel to release the restriction on the locking wheel.

[0024] The beneficial effects of this invention are:

[0025] I. This device utilizes multiple sets of adaptively adjustable clamping rods in conjunction with gear rings, gears, and other transmission structures. It eliminates the need for workpiece positioning based on regular workpiece shapes; simply adjusting the clamping rods to synchronously approach the workpiece allows for stable clamping of workpieces with various irregular shapes. This completely eliminates the need for custom-made fixtures, significantly reducing initial investment and long-term maintenance costs. Workpieces only need to be horizontally placed into the workpiece slot of the planetary wheel; no angle adjustment is required. The clamping rods automatically adapt to the workpiece contour through torsion spring elastic compensation. Even with slight deviations in workpiece placement, the clamping rods can still adaptively adjust to fit the workpiece surface, greatly simplifying the operation process and significantly improving equipment production efficiency. Furthermore, a right-angle frame with torsion springs is designed at the ends of the clamping rods. The two ends of the right-angle frame can adapt to different vertical diameters of the workpiece cross-section. When a certain vertical position of the workpiece contacts the rubber cam first, the non-contacting end continues to approach the workpiece under the elastic force of the torsion spring until both ends are tightly fitted to the workpiece surface. This achieves full-section enveloping clamping of vertically irregular structures, effectively eliminating clamping gaps and significantly improving the clamping stability of workpieces with different vertical diameters.

[0026] Second, by using two symmetrically arranged sets of brake levers in conjunction with the locking wheel, a two-way locking structure is constructed, which completely prevents the clamping rod from rotating and shifting due to external forces during the grinding process. At the same time, the damping material on the contact surface between the locking wheel and the brake lever further enhances the locking effect. Moreover, it can address the issue of slight displacement of the clamping rod that may be caused by the elasticity of traditional damping materials. The pushing ramp at the bottom of the lifting block continuously acts on the push plate, driving the push plate to move towards the locking wheel, compressing the damping material on the contact surface between the brake lever and the locking wheel, and maximizing the compression of the elastic deformation of the damping material to prevent slight displacement of the clamping rod due to elastic rebound. This perfectly prevents the clamping rod from shifting during the rotation of the upper and lower grinding discs.

[0027] Third, the flat rotary bearing used at the bottom of the grinding disc below the workpiece has excellent combined radial and axial load-bearing capacity, which can simultaneously offset the influence of radial and axial loads, prevent the grinding disc from swaying or sinking when under force, provide a stable support foundation for the grinding disc, and ensure that the grinding disc always maintains the preset rotation trajectory during the grinding process. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0029] Figure 2 This is a front view structural diagram of the present invention.

[0030] Figure 3 This is a three-dimensional structural diagram of the lower fixing plate of the present invention.

[0031] Figure 4 This is a top view of the lower fixing plate of the present invention.

[0032] Figure 5 This is a three-dimensional structural diagram of the planetary wheel of the present invention.

[0033] Figure 6 This is a top view of the planetary wheel structure of the present invention.

[0034] Figure 7 This is a schematic diagram of the internal structure of the planetary wheel of the present invention.

[0035] Figure 8 This is a schematic diagram of the adjustment mechanism of the present invention.

[0036] Figure 9 yes Figure 6 The enlarged schematic diagram of part A is shown.

[0037] Figure 10 yes Figure 8 The enlarged schematic diagram of part B is shown.

[0038] Figure 11 yes Figure 8 The enlarged schematic diagram of section C is shown.

[0039] Figure 12 This is a top view of the clamping rod structure of the present invention.

[0040] Figure 13 yes Figure 12 The diagram shown is a cross-sectional view of section AA.

[0041] Figure 14 This is a bottom view of the clamping rod structure of the present invention.

[0042] Figure 15 yes Figure 12 The enlarged schematic diagram of part D is shown.

[0043] Figure 16 yes Figure 14 The enlarged schematic diagram of part E is shown.

[0044] Figure 17 This is a schematic diagram of the pressure application component of the present invention.

[0045] Figure label:

[0046] 10. Base; 11. Control cabinet; 20. Lifting turntable; 21. Connecting frame; 22. Cylinder; 23. Upper fixed plate; 24. Lower fixed plate; 241. Outer lifting column; 242. Inner rotating column; 25. Fitting column; 30. Grinding disc; 40. Planetary wheel; 401. Workpiece groove; 402. Clamping groove; 403. Adjusting groove; 404. Cover plate; 41. Engaging groove ring; 50. Adjusting mechanism; 501. Rotary ring; 502. Turntable; 503. Adjusting rod; 5031. Knob; 51. 52. Clamping gear ring; 60. Fixing gear ring; 61. Clamping rod; 61. Rotating shaft; 611. Gear; 62. Right angle bracket; 621. Rubber cam; 70. Locking assembly; 701. Push plate; 7011. Hollow frame; 7012. Spring; 702. Brake lever; 7021. Braking part; 703. Transmission rod; 704. Spring; 71. Locking wheel; 72. Pressure application assembly; 721. Lifting block; 722. Deployment ramp; 723. Pushing ramp; 724. Straight rod; 725. Inclined groove. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] like Figures 1 to 17As shown, a double-end face grinder for a planar rotary bearing according to the present invention includes a base 10, a lifting rotary table 20, an upper fixed plate 23, a lower fixed plate 24, a grinding disc 30, a planetary wheel 40, an adjusting mechanism 50, a clamping rod 60, a locking assembly 70, a locking wheel 71, and a pressure applying assembly 72. The lifting rotary table 20 is disposed on the top of the base 10 and can rotate and slide vertically relative to the base 10. The upper fixed plate 23 is disposed on the lifting rotary table 20, and the lower fixed plate 24 is disposed on the top of the base 10, and the two are adapted to each other. A rotating grinding disc 30 is disposed between the upper fixed plate 23 and the lower fixed plate 24. The two grinding discs 30 can... The relative rotation grinds the workpiece. Multiple planetary wheels 40 are provided and located between two grinding discs 30 for placing the workpiece. The adjustment mechanism 50 is located inside the planetary wheels 40, which allows the planetary wheels 40 to adapt to various irregularly shaped workpieces and is not limited by the placement angle of the irregularly shaped workpieces. The clamping rod 60 is located inside the planetary wheels 40, which can clamp the workpiece and can adapt to workpieces with different vertical diameters. The locking component 70, locking wheel 71 and pressure component 72 are all located inside the planetary wheels 40 and on one side of the clamping rod 60, which can ensure that the clamping rod 60 will not move when the irregularly shaped workpiece is being ground, thus ensuring the stability of the workpiece grinding.

[0049] like Figures 1 to 4 As shown, a connecting frame 21 is fixedly connected to the lifting turntable 20. The upper fixed plate 23 is fixedly connected to the lifting turntable 20 through the connecting frame 21. A cylinder 22 is fixedly connected to the top of the connecting frame 21. The telescopic end of the cylinder 22 is rotatably connected to the grinding disc 30 inside the upper fixed plate 23. A fitting column 25 is provided inside the base 10, and the fitting column 25 passes through the lower fixed plate 24 and the grinding disc 30 inside the lower fixed plate 24 is fitted with the grinding disc 30 inside the upper fixed plate 23. A corresponding driving component capable of driving the fitting column 25 to rotate is provided inside the base 10, as well as a corresponding driving component capable of driving the grinding disc 30 inside the lower fixed plate 24 to rotate (rotating in opposite directions relative to the grinding disc 30 inside the upper fixed plate 23). An outer lifting column is arranged in a circumferential array on the top outer edge of the lower fixed plate 24. The lowering column 241 and the inner circumference of the grinding disc 30 inside the lower fixed plate 24 are provided with an inner rotating column 242. The planetary wheel 40 is located between the outer lifting column 241 and the inner rotating column 242. The outer lifting column 241 can be raised and lowered under the action of the corresponding driving component to facilitate the placement of the planetary wheel 40 into the grinding area. The inner rotating column 242 can rotate under the action of the corresponding driving component, driving the planetary wheel 40 to rotate. That is, when the workpiece is being ground, the grinding discs 30 above and below the workpiece rotate in opposite directions, and the planetary wheel 40 rotates on its own axis to ensure the workpiece grinding efficiency. The cylinder 22 can control the height of the grinding disc 30 above the workpiece to adapt to different workpiece thicknesses and to ensure that the upper grinding disc 30 can apply a certain pressure during grinding to ensure the grinding effect and prevent the workpiece from moving vertically inside the planetary wheel 40.

[0050] It should be noted that the lower fixed plate 24 and the grinding disc 30 inside the lower fixed plate 24 are connected by a bearing (not shown), and a planar rotary bearing is selected. Because the planar rotary bearing has excellent radial and axial load-bearing capacity, it can simultaneously withstand the radial and axial loads generated during the rotation of the grinding disc 30. During grinding, the grinding disc 30 inside the lower fixed plate 24 needs to rotate at high speed under the drive of the drive component, and must rotate in opposite directions to the grinding disc 30 inside the upper fixed plate 23 to grind the workpiece. The structural characteristics of the planar rotary bearing ensure that the grinding disc 30 maintains a stable rotation trajectory even at high speeds, avoiding radial offset or axial movement of the grinding disc 30 due to load. This stability is directly transmitted to the grinding process, making the grinding force of the grinding disc 30 on the workpiece uniform and continuous, effectively reducing the problems of uneven grinding thickness and excessive surface roughness caused by the shaking of the grinding disc 30, significantly improving the machining accuracy of the planar rotary bearing workpiece, and meeting the quality requirements of high-precision bearing production.

[0051] like Figure 5 , Figure 6 as well as Figure 9 As shown, the planetary wheel 40 has several workpiece slots 401 inside for placing workpieces. A clamping groove 402 is provided on the inner wall of each workpiece slot 401 to facilitate the extension of the clamping rod 60 to hold the workpiece. An elastic seal can be installed between the clamping groove 402 and the clamping rod 60, allowing it to deform with the movement of the clamping rod 60 and preventing metal debris and coolant from entering the planetary wheel 40. Two T-shaped adjustment slots 403 are provided on the top of the planetary wheel 40, allowing the user to operate the clamping rod 60 using the adjustment mechanism 50. A cover plate 404 is installed inside the adjustment slot 403. The cover plate 404 is a snap-fit ​​type, which can be closed after the adjustment mechanism 50 is completed, preventing metal debris and coolant generated during grinding from seeping into the adjustment slot 403 and preventing the adjustment mechanism 50 from getting stuck due to impurities, ensuring smooth subsequent adjustments.

[0052] The planetary wheel 40 is provided with a meshing gear ring on its outer side, which can mesh with the outer lifting column 241 and the inner rotating column 242 at the same time. When the inner rotating column 242 rotates, due to the meshing, it can drive the planetary wheel 40 to rotate between the two grinding discs 30 and revolve around the axis of the grinding disc 30, ensuring the uniformity of grinding.

[0053] like Figures 7 to 9As shown, the adjustment mechanism 50 includes a rotating ring 501, a turntable 502, and an adjustment rod 503. The rotating ring 501 and the turntable 502 are rotatably mounted inside the planetary wheel 40 and are concentric with the planetary wheel 40. The rotating ring 501 is coaxially rotatably mounted on the turntable 502. Two adjustment rods 503 are provided and are respectively fixedly connected to the top of the rotating ring 501 and the turntable 502. The adjustment rod 503 is slidably connected in the adjustment groove 403 and is screwed with a knob 5031. By moving the adjustment rod 503, it can slide in the adjustment groove 403, and the turntable 502 and the rotating ring 501 can rotate, thereby driving the clamping rod 60 to rotate and lock. After adjustment, the knob 5031 can be rotated to fix the position of the adjustment rod 503, so as to prevent the rotating ring 501 and the turntable 502 from rotating and causing the clamping rod 60 to move when the workpiece is being ground.

[0054] The planetary wheel 40 has several clamping gear rings 51 and fixed gear rings 52 that correspond to the workpiece groove 401. The outer rings of the clamping gear rings 51 mesh with the turntable 502, and the outer rings of the fixed gear rings 52 mesh with the rotating ring 501. When the turntable 502 or the rotating ring 501 rotates, it can simultaneously drive the multiple clamping gear rings 51 or fixed gear rings 52 to rotate.

[0055] like Figures 7 to 17 As shown, clamping rods 60 are disposed inside the planetary wheel 40, and each workpiece slot 401 corresponds to at least three clamping rods 60. One end of each clamping rod 60 is provided with a rotating shaft 61, which is rotatably connected to the inside of the planetary wheel 40. The clamping rods 60 and the rotating shaft 61 are fixedly connected, and a torsion spring is provided between the rotating shaft 61 and the inner wall of the planetary wheel 40. A gear 611 is fixedly connected to the outside of the rotating shaft 61, and the gear 611 meshes with the inner ring of the corresponding clamping gear ring 51. After placing the irregularly shaped workpiece inside the workpiece slot 401 (without needing a specific angle), (It can be placed horizontally) to make the clamping gear ring 51 rotate. Through meshing, the gear 611 rotates, and multiple clamping rods 60 simultaneously approach each other to clamp the workpiece. If any clamping rod 60 contacts the workpiece, the clamping gear ring 51 continues to rotate (the torsion spring on the rotating shaft 61 corresponding to the clamping rod 60 is subjected to force and twists, accumulating elastic potential energy) until all clamping rods 60 contact the workpiece. Then, the corresponding knob 5031 is rotated to stop the turntable 502 from rotating, thereby confining the irregular workpiece within the workpiece groove 401 without the action of external force.

[0056] A right-angle bracket 62 is provided at the other end of the clamping rod 60, and a torsion spring is also provided between the right-angle bracket 62 and the clamping rod 60. Rubber cams 621 are provided at both ends of the right-angle bracket 62. When facing workpieces with different vertical diameters, one end of the right-angle bracket 62 will contact the workpiece first, while the other end will continue to move towards the workpiece under the elastic force of the torsion spring until both ends are in contact with the workpiece surface. Due to the deformable characteristics of the torsion spring between the right-angle bracket 62 and the clamping rod 60, even if the diameter of the workpiece is different at different vertical positions (such as stepped, conical and other irregular structures), the rubber cams 621 at both ends can be tightly in contact with the workpiece surface through the adaptive adjustment of the torsion spring, avoiding local loosening of the clamping due to uneven vertical dimensions of the workpiece. That is, the clamping rod 60 can adapt to both irregularly shaped workpieces and workpieces with different vertical diameters.

[0057] A locking wheel 71 is fixedly connected to the rotating shaft 61, which can rotate with the rotating shaft 61. The rotation of the locking wheel 71 can be restricted by the locking component 70, thereby stopping the rotating shaft 61 from rotating.

[0058] The locking assembly 70 has multiple components corresponding to the locking wheel 71, including a push plate 701, two sets of brake rods 702 and transmission rods 703 fixedly connected to each other, and a spring 704. The push plate 701 is located on one side of the locking wheel 71. The connection between the brake rods 702 and the transmission rods 703 is rotatably connected to the push plate 701, and the two sets of brake rods 702 and transmission rods 703 are symmetrically arranged. A braking part 7021 is provided at the end of the brake rod 702 near the locking wheel 71. The spring 704 is disposed between the two transmission rods 703, so that the two transmission rods 703 are in contact with each other in the initial state. When the two transmission rods 703 move away from each other, they drive the two brake rods 702 to move closer together. The braking part 7021 is oblique. Two brake levers 702 are brought close together, with the longer end of the beveled edge rotating and contacting the locking wheel 71. The surface of the locking wheel 71 is in close contact with the beveled edge of the brake part 7021. Since the locking wheel 71 is fixedly connected to the rotating shaft 61, the rotating shaft 61 is locked, thereby ensuring that the clamping rod 60 maintains the clamping state of the workpiece and preventing the clamping rod 60 from loosening due to vibration or the force of the grinding disc 30 during the grinding process. The two brake parts 7021 respectively restrict the forward and reverse rotation of the locking wheel 71, thereby forming a two-way locking mechanism to prevent the clamping rod 60 from rotating and deviating due to vibration or the force of the grinding disc 30 during the grinding process. Damping material is provided on the outside of both the locking wheel 71 and the brake lever 702 to improve the contact friction.

[0059] The pressure application component 72 is located on the side of the locking component 70 away from the locking wheel 71, and includes a lifting block 721, an unfolding ramp 722, a pushing ramp 723, a straight rod 724, and a sloping groove 725. The lifting block 721 is vertically slidably connected to the planetary wheel 40 with a single degree of freedom. The unfolding ramp 722 is located on both sides of the lifting block 721 near the transmission rod 703. When the lifting block 721 descends, the unfolding ramps 722 on both sides push the two transmission rods 703 away from each other. The subsequent stroke of the unfolding ramp 722 is a vertical plane, which prevents the two transmission rods 703 from continuously unfolding during the subsequent descent of the lifting block 721. The pushing ramp 723 is located at the bottom of the lifting block 721. After the lifting block 721 descends and the unfolding ramp 722 makes the two transmission rods 703 move away from each other, the pushing ramp 723 continues to move down and acts on the push plate 701, causing the push plate 701 to move towards the locking wheel 71.

[0060] The straight rod 724 is fixedly connected to the lifting block 721, and the inclined groove 725 is opened on the fixed gear ring 52. The straight rod 724 passes through the inclined groove 725. When the fixed gear ring 52 rotates, the inclined groove 725 enables the straight rod 724 to drive the lifting block 721 to slide vertically, thereby precisely controlling the descent stroke of the lifting block 721. This sequentially completes the unfolding action of the transmission rod 703 and the pushing action of the push plate 701, providing a stable power input for the bidirectional locking of the locking wheel 71. This ensures the synchronization and reliability of the entire clamping and locking mechanism, and is suitable for the high precision requirements of workpiece clamping stability during the double-end grinding process of the planar rotary bearing.

[0061] It should be noted that, since existing damping materials are typically elastic, when the brake lever 702 restricts the rotation of the locking wheel 71, if the clamping rod 60 is under force, the damping material's elasticity causes a small displacement of the clamping rod 60, resulting in an unstable workpiece clamping. In this device, after the brake lever 702 is pressed against the locking wheel 71, it can move a certain distance towards the locking wheel 71. With the continuous action of the jacking ramp 723 on the push plate 701, the damping material at the contact surface between the brake lever 702 and the locking wheel 71 is further compressed, maximizing the limitation of its elastic deformation. This secondary clamping design effectively counteracts the small displacement that may be caused by the elasticity of the damping material itself, ensuring that the locking force of the brake lever 702 on the locking wheel 71 remains stable. This makes the clamping state of the clamping rod 60 more secure and reliable, completely solving the problem of workpiece clamping caused by the elasticity of the damping material in existing technologies. The problem of insecure clamping is addressed by the fact that locking the locking wheel 71 relies not only on friction but also on the rigid clamping effect of the longer diameter end of the braking part 7021. The oblique edge of the braking part 7021 has an eccentric structure, and its longer diameter end can form a rigid engagement when it contacts the tooth groove or specific engagement structure of the locking wheel 71. This physical rigid engagement provides stronger anti-torsion capability and locking stability compared to locking methods that rely solely on friction. Even if the coefficient of friction of the contact surface decreases slightly due to long-term use or when subjected to a large external impact, this rigid clamping structure can still ensure that the locking wheel 71 will not rotate unexpectedly. This fundamentally eliminates the risk of clamping loosening due to insufficient friction, further enhancing the reliability and safety of the entire clamping and locking mechanism, and ensuring that the workpiece will not shift during double-end grinding.

[0062] A hollow frame 7011 is slidably connected to the bottom of the push plate 701. The hollow frame 7011 is fixedly connected to the inside of the planetary wheel 40. A spring 7012 is provided between the hollow frame 7011 and the push plate 701. When the workpiece is released from clamping, the push plate 701 is reset, the damping material gradually returns to its initial shape, the locking wheel 71 is released, and after the fixed gear ring 52 is rotated in the opposite direction, the clamping rod 60 is able to release the workpiece. The entire clamping mechanism returns to the ready-to-work state, ensuring that the equipment can efficiently and cyclically complete the next round of workpiece clamping and grinding operations.

[0063] like Figures 1 to 17 As shown, a control cabinet 11 is installed on one side of the base 10, which can display the operating parameters of the equipment in real time, such as the rotation speed of the grinding disc 30 and the grinding feed speed. The various functions of the grinding machine can be conveniently controlled through the touch screen. The control cabinet 11 integrates a PLC control system, which can pre-set and store multiple sets of grinding process parameters according to the processing requirements of different workpieces. The operator only needs to call the corresponding program through the selection button on the control cabinet 11 to automatically complete a series of processes such as workpiece positioning, clamping, grinding and unloading, which effectively reduces the complexity and error rate of manual operation.

[0064] Working principle:

[0065] After the equipment is started, the lifting turntable 20 drives the upper fixed plate 23 to move upward under the driving action, increasing the distance between the upper fixed plate 23 and the lower fixed plate 24, providing sufficient space for subsequent workpiece placement. The workpieces to be ground (including irregularly shaped workpieces) are placed one by one into the workpiece slot 401 of the planetary wheel 40. There is no need to deliberately adjust the workpiece placement angle; they can be placed horizontally.

[0066] Open the snap-on cover 404 of the top adjustment slot 403 of the planetary wheel 40, and use a specific tool to move the adjustment rod 503 so that it slides in the adjustment slot 403, driving the turntable 502 to rotate. When the turntable 502 rotates, it synchronously drives all the clamping gear rings 51 to rotate. The inner ring of the clamping gear ring 51 meshes with the gear 611 on the rotating shaft 61. The rotation of the clamping gear ring 51 drives the gear 611 to rotate, thereby causing multiple clamping rods 60 to move synchronously towards the workpiece around the rotating shaft 61. If some clamping rods 60 contact the workpiece first, continue to rotate the turntable 502. The torsion spring on the rotating shaft 61 corresponding to the clamping rods 60 that have contacted the workpiece will be twisted and accumulate elastic potential energy until all clamping rods 60 are in contact with the surface of the workpiece. Rotate the knob 5031 on the adjustment rod 503 to fix the position of the adjustment rod 503, so that the turntable 502 stops rotating, completing the initial clamping.

[0067] For workpieces with different vertical diameters (such as stepped or conical), the torsion spring between the right-angle bracket 62 at the end of the clamping rod 60 and the clamping rod 60 plays a role. After one end of the right-angle bracket 62 contacts the workpiece first, the non-contacting end continues to move closer to the workpiece under the elastic force of the torsion spring until both ends of the rubber cam 621 are tightly attached to the workpiece surface, thus achieving vertical dimension adaptive clamping.

[0068] Actuating the adjusting rod 503 connecting the rotating ring 501 causes the rotating ring 501 to rotate. The rotating ring 501 meshes with multiple fixed gear rings 52, synchronously driving the fixed gear rings 52 to rotate. The inclined groove 725 on the fixed gear ring 52 drives the lifting block 721 to descend vertically through the through rod 724. In the initial stage of the descent of the lifting block 721, the ramps 722 on both sides push the two transmission rods 703 away from each other. The transmission rods 703 drive the symmetrically arranged brake rods 702 to move closer to each other. The braking part 7021 at the end of the brake rod 702 gradually comes into contact with the surface of the locking wheel 71. Due to the inclined edge design of the braking part 7021, the longer diameter end forms a one-way lock when it contacts the locking wheel 71. The two sets of brake rods 702 restricts the forward and reverse rotation of the locking wheel 71 to achieve bidirectional locking. The lifting block 721 continues to descend, and the subsequent vertical plane of the ramp 722 no longer pushes the transmission rod 703. At this time, the pushing ramp 723 acts on the push plate 701, pushing the push plate 701 to move towards the locking wheel 71, compressing the damping material of the contact surface between the brake rod 702 and the locking wheel 71, maximizing the limitation of the elastic deformation of the damping material, and preventing the clamping rod 60 from making slight deviations due to vibration or grinding force, ensuring that the clamping is completely locked. Finally, the cover plate 404 of the adjusting groove 403 is closed to prevent grinding debris and coolant from seeping in. After locking is completed, the knob 5031 corresponding to the adjusting rod 503 is locked.

[0069] The drive unit inside the base 10 controls the outer lifting column 241 on the top of the fixed plate 24 to descend, making it easier for the planetary wheel 40 to be placed into the grinding operation space. Then, the planetary wheel 40 with the workpiece is placed between the outer lifting column 241 and the inner rotating column 242, ensuring that the meshing gear ring on the outside of the planetary wheel 40 meshes with both the outer lifting column 241 and the inner rotating column 242 at the same time. Then, the outer lifting column 241 is raised and meshes with the meshing groove ring 41 to complete the loading preparation.

[0070] The cylinder 22 is activated, and its telescopic end pushes the grinding disc 30 inside the upper fixed plate 23 downward until the grinding disc 30 contacts the upper surface of the workpiece, applying appropriate pressure (adjusted according to the workpiece thickness and grinding requirements). This ensures the grinding effect while preventing the workpiece from moving vertically. Simultaneously, the drive components inside the base 10 are activated. One set of drive components drives the fitting column 25 to rotate, which in turn drives the grinding disc 30 inside the upper fixed plate 23 to rotate. The other set of drive components directly drives the grinding disc 30 inside the lower fixed plate 24 to rotate, with the upper and lower grinding discs 30 rotating in opposite directions. This results in efficient grinding of both ends of the workpiece. At the same time, the drive components drive the inner rotation of the lower fixed plate 24. The inner rotating column 242 drives the planetary wheel 40 to rotate and revolve between the two grinding discs 30 through the meshing gear ring. The rotation ensures that all parts of the workpiece are in uniform contact with the grinding disc 30, and the revolve expands the grinding coverage of the workpiece, ultimately achieving uniform and high-precision grinding of both end faces of the workpiece. During the grinding process, the planar rotary bearing between the lower fixed disc 24 and the lower grinding disc 30 plays a key role. Its excellent radial and axial load-bearing capacity can prevent radial offset or axial movement caused by load when the grinding disc 30 rotates at high speed, ensuring that the grinding force of the grinding disc 30 on the workpiece is uniform and stable, and avoiding problems such as uneven grinding thickness and excessive surface roughness of the workpiece.

[0071] After grinding, cylinder 22 drives the upper grinding disc 30 to move upward, and lifting turntable 20 drives the upper fixed disc 23 to move upward synchronously. Loosen knob 5031, reverse the adjustment rod 503 connected to the rotating ring 501, drive the fixed gear ring 52 to rotate in the opposite direction, drive the lifting block 721 to move upward through inclined groove 725 and straight rod 724, push the inclined slope 723 to disengage from the push plate 701, the push plate 701 is reset under the elastic force of spring 7012 in hollow frame 7011, the transmission rod 703 is in contact with each other under the action of spring 704, the brake rod 702 moves away from the locking wheel 71, the locking state is released, reverse the adjustment rod 503 connected to the turntable 502, drive the clamping gear ring 51 to rotate in the opposite direction, drive the clamping rod 60 away from the workpiece through gear 611, control the outer lifting column 241 to descend, take out planetary wheel 40 and unload the ground workpiece, finally reset planetary wheel 40, the equipment returns to the initial state, waiting for the next round of grinding operation.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A double-end face grinder for a planar rotary bearing, comprising: The assembly comprises an upper fixed plate (23), a lower fixed plate (24), and two grinding discs (30), the two grinding discs (30) being located inside the upper fixed plate (23) and the lower fixed plate (24) respectively, and positioned above and below the workpiece. The two grinding discs (30) are characterized in that they can rotate relative to the lower fixed plate (24), and a planar rotary bearing is provided between the lower grinding disc (30) and the lower fixed plate (24). The assembly also includes: Multiple planetary wheels (40) are provided and located between two grinding discs (30) for placing workpieces. They can rotate relative to the lower fixed disc (24) and revolve around the axis of the lower fixed disc (24). The clamp (60) is rotatable relative to the planetary wheel (40). A rotating shaft (61) is fixedly connected to the clamp (60). The rotating shaft (61) is rotatably mounted on the inner wall of the planetary wheel (40), and a torsion spring is provided between the rotating shaft (61) and the inner wall of the planetary wheel (40). A right-angle bracket (62) is provided at the end of the clamping rod (60) away from the pivot (61). The right-angle bracket (62) can rotate relative to the clamping rod (60), and a torsion spring is also provided between the right-angle bracket (62) and the clamping rod (60). The locking wheel (71) is fixedly connected to the rotating shaft (61) and can rotate with the rotating shaft (61). Two symmetrically arranged brake levers (702) are provided on one side of the locking wheel (71) and can rotate relative to the planetary wheel (40) to restrict the rotation of the locking wheel (71). The lifting block (721) is slidably connected inside the planetary wheel (40), and can slide vertically relative to the planetary wheel (40), and can push the two brake levers (702) towards the locking wheel (71) when descending; The planetary wheel (40) has two T-shaped adjustment slots (403) on its top. An adjustment rod (503) is slidably connected in the adjustment slot (403). A knob (5031) is screwed onto the adjustment rod (503). A turntable (502) and a ring (501) are rotatably installed inside the planetary wheel (40). The two adjustment rods (503) are fixedly connected to the turntable (502) and the ring (501) respectively. Rotating the adjustment rod (503) can drive the turntable (502) or the ring (501) to rotate synchronously. Rotating the knob (5031) can fix the position of the adjustment rod (503) in the adjustment slot (403). The planetary wheel (40) is internally equipped with multiple clamping gear rings (51) and fixed gear rings (52). The outer ring of the clamping gear ring (51) meshes with the turntable (502), and the outer ring of the fixed gear ring (52) meshes with the rotating ring (501). A gear (611) is fixedly connected to the rotating shaft (61). The gear (611) meshes with the inner ring of the clamping gear ring (51). When the turntable (502) rotates, it can drive the gear (611) and the rotating shaft (61) to rotate through the clamping gear ring (51).

2. The double-end face grinding machine for a planar rotary bearing according to claim 1, characterized in that, The planetary wheel (40) is provided with a meshing gear ring on its outer side, and the outer edge of the top of the lower fixed disk (24) is provided with an outer lifting column (241) in a circular array. The inner side of the grinding disc (30) inside the lower fixed disk (24) is provided with an inner rotating column (242) in a circular array. The meshing gear ring can mesh with both the outer lifting column (241) and the inner rotating column (242) at the same time.

3. The double-end face grinder for a planar rotary bearing according to claim 1, characterized in that, The planetary wheel (40) has a plurality of workpiece slots (401) for placing workpieces inside. Each workpiece slot (401) corresponds to at least three clamping rods (60). The inner wall of the workpiece slot (401) has a clamping groove (402) for the clamping rods (60) to extend out and clamp the workpiece.

4. A double-end face grinder for a planar rotary bearing according to claim 1, characterized in that, The right-angle bracket (62) is provided with rubber cams (621) at both ends, and the rubber cams (621) can fit against the surface of the workpiece.

5. A double-end face grinder for a planar rotary bearing according to claim 1, characterized in that, One end of the brake lever (702) is fixedly connected to a transmission rod (703). A push plate (701) is rotatably installed at the connection between the brake lever (702) and the transmission rod (703). A spring piece (704) is provided between the two transmission rods (703). The spring piece (704) can make the two transmission rods (703) fit together in the initial state. When the transmission rods (703) move away from each other, they can drive the brake lever (702) to rotate in the direction of the locking wheel (71).

6. A double-end face grinder for a planar rotary bearing according to claim 5, characterized in that, The brake lever (702) has a brake part (7021) at one end near the locking wheel (71). The brake part (7021) has a beveled structure. The brake parts (7021) of the two brake levers (702) can respectively restrict the locking wheel (71) from rotating forward and backward. The surface of the locking wheel (71) and the surface of the brake part (7021) are both provided with damping material. The damping material can increase the friction between the brake part (7021) and the locking wheel (71).

7. A double-end face grinder for a planar rotary bearing according to claim 5, characterized in that, The lifting block (721) is provided with an unfolding ramp (722) on both sides and a pushing ramp (723) at the bottom of the lifting block (721). When the lifting block (721) descends, the unfolding ramp (722) can first push the transmission rod (703) away from each other, and the pushing ramp (723) can then push the push plate (701) to move towards the locking wheel (71). A straight rod (724) is fixedly connected to the lifting block (721), and a groove (725) is opened on the fixed gear ring (52). The straight rod (724) passes through the groove (725). When the fixed gear ring (52) rotates, it can drive the lifting block (721) to slide vertically through the groove (725) and the straight rod (724).

8. A double-end face grinder for a planar rotary bearing according to claim 5, characterized in that, The bottom of the push plate (701) is slidably connected to a hollow frame (7011), which is fixedly installed inside the planetary wheel (40). A spring (7012) is provided between the hollow frame (7011) and the push plate (701). The spring (7012) can pull the push plate (701) to reset when the lifting block (721) moves upward, so that the brake rod (702) moves away from the locking wheel (71) to release the restriction on the locking wheel (71).

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