A groove grinding machine for precision bearing

Abstract

The present disclosure relates to the technical field of bearing processing, and one embodiment of the present disclosure provides a channel grinding machine for processing precision bearings, which comprises a rack and a stand fixed on the surface of the rack, a mounting assembly arranged on the surface of the rack, and a groove polishing assembly arranged on the stand. The groove polishing assembly comprises a rotating disc rotatably connected to the side surface of the stand by electric drive, and a fixed rod is fixedly connected to the surface of the rotating disc at both ends. One end of the fixed rod is provided with a transmission frame, and an adjusting seat connected by linear drive is arranged in the transmission frame. Through the above technical scheme, the technical problem that the existing clamping mechanism in the prior art is mostly a special tool designed for a specific specification bearing, lacks a flexible and adjustable universal structure, and cannot quickly adapt to the clamping requirements of bearings of different models is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of bearing processing, specifically to a groove grinding machine for machining precision bearings. Background Technology

[0002] The accuracy of the raceway of a precision bearing directly determines its rotational stability, load-bearing capacity, and service life. Raceway grinding machines are the core equipment for achieving high-precision raceway machining, while the adaptability and adjustment efficiency of the workpiece clamping mechanism are crucial for ensuring continuous machining. As bearing manufacturing moves towards multi-specification and customization, the clamping deficiencies of traditional raceway grinding machines are becoming increasingly apparent: existing clamping mechanisms are mostly specialized tooling designed for specific bearing specifications, lacking a flexible and universal structure, and unable to quickly adapt to the clamping requirements of different bearing models.

[0003] The drawbacks of traditional clamping methods are particularly prominent: when changing processing specifications, it is necessary to disassemble the original special tooling and replace it with a fixture that is compatible with the new specifications. Disassembly, assembly, and recalibration are time-consuming, resulting in excessive downtime and significantly impacting production efficiency. During tooling adjustment, manual repeated adjustments and positioning are required, which can easily affect clamping accuracy due to datum deviations, leading to out-of-tolerance roundness and cylindricity of the grooved machining. Some adjustment mechanisms are cumbersome to operate and require professional personnel, which not only increases labor intensity but also makes it difficult to adapt to the frequent model changes required in mass production.

[0004] Therefore, developing a precision bearing groove grinding machine that can quickly adjust the clamping structure and adapt to bearings of various specifications has become an urgent need to solve the pain points of traditional methods. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a groove grinding machine for machining precision bearings, which solves the technical problem that existing clamping mechanisms are mostly special tooling designed for bearings of specific specifications, lacking a flexible and universal structure, and unable to quickly adapt to the clamping requirements of different bearing models.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a groove grinding machine for machining precision bearings, comprising: A frame and a stand, wherein the stand is fixed to the surface of the frame; Mounting components are disposed on the surface of the rack; A groove grinding assembly, wherein the groove grinding assembly is mounted on the support; The groove grinding assembly includes a rotating disk, which is electrically driven and rotatably connected to the side surface of the stand. Both ends of the rotating disk surface are horizontally fixedly connected to a fixing rod. One end of the fixing rod is provided with a transmission frame, and an adjustment seat connected by a linear drive is provided inside the transmission frame.

[0007] As a further technical solution, a first motor is installed on the side surface of the adjustment seat, a rotating shaft is provided at the output end of the first motor, a drive block is provided at one end of the rotating shaft, a grinding wheel is fitted on the drive block, and the grinding wheel is fixedly connected to the drive block by bolts.

[0008] According to another aspect, in at least one embodiment of the present invention, the mounting assembly includes a base fixed to the surface of the frame, a movable frame connected by a horizontal linear drive is disposed inside the base, and a second motor is disposed on the side surface of the movable frame.

[0009] As a further technical solution, the output end of the second motor is provided with a rotating frame, and a pair of transmission grooves are opened on the side surface of the rotating frame. A drive screw is rotatably connected in the transmission groove, and a slider is provided in each transmission groove.

[0010] As a further technical solution, the slider is connected by a linear sliding connection, the slider and the drive screw are connected by a threaded connection, and a clamping rod is horizontally fixedly connected to the side surface of the slider.

[0011] As a further technical solution, the side surface of the movable frame is provided with an annular slide rail, and both ends of the side surface of the rotating frame are provided with sliding sleeves, which are slidably connected to the annular slide rail.

[0012] As a further technical solution, the cross-section of the connection between the drive block and the grinding wheel is polygonal.

[0013] As a further technical solution, a screwing block is provided at one end of the drive screw, and the drive screw has a double-segment thread structure with the thread directions at both ends of the drive screw being opposite.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: This disclosure solves the problems of poor adaptability and cumbersome changeover of traditional special tooling by using a groove grinding assembly. The drive screw with double-stage reverse threads engages with the slider threadedly. Rotating the screw block drives the clamping rod to move synchronously in the opposite direction, eliminating the need to disassemble and change fixtures. This allows for quick adaptation to bearings of different diameters and significantly reduces downtime for changeovers. The linear sliding engagement between the slider and the transmission groove ensures smooth movement of the clamping rod and uniform force on the bearing during clamping, preventing clamping deformation. The end of the clamping rod fits against the outer circle of the bearing, enhancing clamping stability. Combined with the rotating frame driven by a second motor, this drives the bearing to rotate at a uniform speed.

[0015] The annular slide rail and sliding sleeve form a dual guide, limiting the radial movement of the rotating frame, reducing vibration during bearing rotation, and ensuring the roundness and cylindricity accuracy of the groove machining. The entire assembly is easy to operate, requiring no professional personnel for debugging, which reduces labor intensity and can adapt to the batch processing needs of bearings of multiple specifications. It solves the pain point of traditional special tooling being unable to quickly switch processing models, improving production continuity and versatility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle; In the diagram: 1. Frame; 2. Stand; 3. Groove grinding assembly; 3-1. Rotary disc; 3-2. Fixed rod; 3-3. Transmission frame; 3-4. Adjustment seat; 3-5. First motor; 3-6. Rotating shaft; 3-7. Drive block; 3-8. Grinding wheel; 4. Mounting assembly; 4-1. Base; 4-2. Moving frame; 4-3. Second motor; 4-4. Rotating frame; 4-5. Transmission groove; 4-6. Drive screw; 4-7. Slider; 4-8. Clamping rod; 5. Circular slide rail; 6. Sliding sleeve; 7. Twisting block. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-4 As shown, it illustrates a groove grinding machine for machining precision bearings according to an embodiment of the present disclosure, comprising: The frame 1 and the stand 2 are fixed to the surface of the frame 1; Mounting component 4 is disposed on the surface of the frame 1; Groove grinding assembly 3, wherein the groove grinding assembly 3 is disposed on the stand 2; The groove grinding assembly 3 includes a rotating disk 3-1, which is rotatably connected to the side surface of the stand 2 via electric drive. Fixed rods 3-2 are horizontally fixed to both ends of the rotating disk 3-1. A transmission frame 3-3 is provided at one end of each fixed rod 3-2. An adjusting seat 3-4, connected by a linear drive, is provided inside the transmission frame 3-3. A first motor 3-5 is mounted on the side surface of the adjusting seat 3-4. A rotating shaft 3-6 is provided at the output end of the first motor 3-5. A driving block 3-7 is provided at one end of the rotating shaft 3-6. A grinding wheel 3-8 is fitted onto the driving block 3-7, and the grinding wheel 3-8 is fixedly connected to the driving block 3-7 by bolts.

[0025] In some examples, in order to achieve high-precision grinding of bearing channels and rapid adaptation to bearings of different specifications, and to solve the problems of cumbersome grinding position adjustment, poor adaptability and insufficient precision of traditional grinding machines, a groove grinding component 3 was designed. This component includes a frame 1 made of high-strength cast iron, which is subjected to aging treatment to eliminate internal stress and the surface is precision ground to ensure flatness. The stand 2 is rigidly fixed to the frame 1 by bolts with preset positioning holes. The side surface of the stand is milled to ensure verticality. The two together form a rigid support frame, which provides a stable installation reference for the grinding components and avoids precision deviation caused by grinding vibration.

[0026] The rotating disk 3-1 on the side surface of the stand 2 is connected to the output end of the servo motor via a deep groove ball bearing. The motor drives it to rotate smoothly. The fixing rods 3-2 at both ends of the rotating disk 3-1 are horizontally fixed by welding. The rods are heat-treated to improve rigidity. One end is bolted to the transmission frame 3-3 for detachable assembly. A guide groove is opened inside the transmission frame 3-3. The linear drive component (such as a precision electric slide) is fixed inside the transmission frame 3-3 by a bracket. The output end is rigidly connected to the adjustment seat 3-4. The adjustment seat 3-4 slides precisely along the guide groove to ensure the position adjustment accuracy of the grinding wheel 3-8.

[0027] The first motor 3-5 on the side surface of the adjusting seat 3-4 is fixed by the motor seat, and the output end is keyed to the rotating shaft 3-6. The drive block 3-7 at one end of the rotating shaft 3-6 is integrally machined with the shaft body. The inner hole of the grinding wheel 3-8 is clearance-fitted with the drive block 3-7 and fixed by circumferentially distributed bolts, which facilitates quick replacement according to the groove specifications.

[0028] During operation, the rotating disk 3-1 drives the fixed rod 3-2 and the transmission frame 3-3 to rotate. The linear drive adjusts the position of the adjusting seat 3-4 so that the grinding wheel 3-8 is aligned with the groove. The first motor 3-5 drives the grinding wheel 3-8 to rotate at high speed for grinding. The precise adjustment structure and rigid transmission link ensure the machining accuracy of the groove. The detachable grinding wheel 3-8 and the adjustable seat 3-4 are adapted to the machining of bearings with different inner diameters.

[0029] like Figures 1-4As shown in the figure, the mounting component 4 in this embodiment includes a base 4-1, which is fixed to the surface of the frame 1. A movable frame 4-2 is provided inside the base 4-1 and connected by a horizontal linear drive. A second motor 4-3 is provided on the side surface of the movable frame 4-2. A rotating frame 4-4 is provided at the output end of the second motor 4-3. A pair of transmission grooves 4-5 are provided on the side surface of the rotating frame 4-4. A drive screw 4-6 is rotatably connected in the transmission grooves 4-5. A slider 4-7 is provided in each of the transmission grooves 4-5. The sliders 4-7 are connected by a linear sliding connection. The sliders 4-7 and the drive screw 4-6 are connected by a threaded engagement. A clamping rod 4-8 is horizontally fixedly connected to the side surface of the slider 4-7.

[0030] In some examples, in order to achieve rapid clamping, stable rotation and machining position adjustment of precision bearings, and to solve the problems of low efficiency, large rotational vibration and poor adaptability of traditional clamping, an installation component 4 was designed. This component includes a base 4-1 made of cast iron and precision ground. It is fixed to the positioning groove on the surface of the frame 1 by bolts to ensure accurate installation reference. The horizontal linear drive component (such as a ball screw slide) inside the base 4-1 is fixed by bolts. The output end is rigidly connected to the moving frame 4-2. The moving frame 4-2 slides smoothly along the pre-set guide rail of the base 4-1 to realize the horizontal adjustment of the bearing machining position.

[0031] The second motor 4-3 on the side surface of the movable frame 4-2 is fixed by a motor mount, and its output end is keyed to the rotating frame 4-4. The motor uses servo drive to ensure stable speed and provide precise power for the bearing rotation. The transmission groove 4-5 on the side surface of the rotating frame 4-4 is milled, and the drive screw 4-6 is rotatably connected to the groove through the bearing. The threads at both ends of the screw turn in opposite directions. The slider 4-7 in the groove is slidably connected to the transmission groove 4-5 through a linear guide rail. The slider 4-7 has an internal thread in the middle to cooperate with the drive screw 4-6, forming a bidirectional synchronous transmission structure. The clamping rod 4-8 on the side surface of the slider 4-7 is horizontally fixed by welding, and an arc-shaped clamping block is installed at the end of the rod to adapt to the outer circle contour of the bearing.

[0032] During clamping, rotating the drive screw 4-6 drives the two sliders 4-7 to move synchronously in opposite directions along the transmission groove 4-5. The clamping rod 4-8 securely clamps the bearing through the clamping block. During machining, the second motor 4-3 drives the rotating frame 4-4 to rotate the bearing at a uniform speed, cooperating with the groove grinding assembly 3 to complete the groove grinding. The horizontally linearly driven moving frame 4-2 adjusts the machining position, and the bidirectional synchronous clamping structure adapts to bearings of different diameters, ensuring clamping stability and rotational accuracy, and guaranteeing precision machining requirements.

[0033] For example, such as Figure 4As shown, the side surface of the movable frame 4-2 is provided with an annular slide rail 5, and both ends of the side surface of the rotating frame 4-4 are provided with sliding sleeves 6, which are slidably connected to the annular slide rail 5.

[0034] In some examples, the annular slide rail 5 on the side surface of the movable frame 4-2 is fixed by bolts, made of wear-resistant stainless steel, and has a U-shaped cross-section. The sliding sleeve 6 on the side surface of the rotating frame 4-4 is clearance-fitted with the slide rail, and has built-in balls to reduce friction. The slide rail and the sliding sleeve 6 work together to drive the second motor 4-3, forming a double rotation guide, which restricts the radial movement of the rotating frame 4-4, so that the runout of the bearing is minimal when rotating, ensuring the roundness accuracy of the groove grinding.

[0035] For example, such as Figure 2 As shown, the cross-section of the connection between the drive block 3-7 and the grinding wheel 3-8 is polygonal.

[0036] In some examples, the polygonal cross-section of the connection between the drive block 3-7 and the grinding wheel 3-8 is integrally milled, and the chamfered edges facilitate fitting. This structure ensures a seamless fit between the two, preventing relative slippage during torque transmission, and, combined with circumferential bolt locking, provides double anti-loosening protection. When replacing the grinding wheel 3-8, there is no need to calibrate coaxiality; it can be directly fitted and fixed, improving wheel replacement efficiency and grinding accuracy.

[0037] For example, such as Figure 4 As shown, a screwing block 7 is provided at one end of the drive screw 4-6. The drive screw 4-6 has a double-segment thread structure, and the thread directions at both ends of the drive screw 4-6 are opposite.

[0038] In some examples, the screwing block 7 at one end of the drive screw 4-6 has a hexagonal structure with knurled surfaces to increase friction and facilitate manual screwing. The double-section reverse threads are precision-machined to precisely mate with the internal threads of the slider 4-7. During screwing, the two sliders 4-7 move synchronously in opposite directions along the transmission groove 4-5, causing the clamping rod 4-8 to symmetrically clamp the bearings, ensuring that the clamping center coincides with the rotation center, thus improving clamping efficiency and stability.

[0039] In actual use: Securely install the frame 1 and the stand 2 at the processing station, ensuring that all components are connected without looseness. The base 4-1 is fixed to the surface of the frame 1 with bolts. Rotate the screw block 7 on the side of the rotating frame 4-4 to drive the double-section reverse thread drive screw 4-6 to rotate. The slider 4-7 in the transmission groove 4-5 moves synchronously in the opposite direction, causing the clamping rod 4-8 to approach and precisely clamp the bearing. The sliding sleeve 6 slides along the annular slide rail 5 to help the rotating frame 4-4 maintain stability and avoid deviation. Activate the horizontal linear drive in the base 4-1 to drive the moving frame 4-2 to adjust the horizontal position of the bearing, so that the bearing groove is aligned with the groove grinding assembly 3. Adjust the adjusting seat according to the bearing groove specifications through the linear drive in the transmission frame 3-3. At position 3-4, mount the appropriate grinding wheel 3-8 onto the polygonal drive block 3-7 and secure it with bolts. Start the first motor 3-5, and the rotating shaft 3-6 drives the grinding wheel 3-8 to rotate at high speed. Simultaneously, start the electric drive on the stand 2. The rotating disk 3-1 drives the fixed rod 3-2 and the transmission frame 3-3 to rotate. The second motor 4-3 drives the rotating frame 4-4 to rotate the bearing at a uniform speed. The grinding wheel 3-8 and the bearing work together to complete the groove grinding. During the grinding process, the position of the grinding wheel 3-8 can be finely adjusted in real time through the adjusting seat 3-4 to ensure processing accuracy. After grinding is completed, turn off all motors, rotate the drive screw 4-6 in the opposite direction to release the clamping rod 4-8, remove the bearing, and complete one processing cycle.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A groove grinding machine for machining precision bearings, characterized in that, include: A frame (1) and a stand (2), wherein the stand (2) is fixed to the surface of the frame (1); Mounting component (4), said mounting component (4) is disposed on the surface of the frame (1); Groove grinding assembly (3), wherein the groove grinding assembly (3) is disposed on the stand (2); The groove grinding assembly (3) includes a rotating disk (3-1), which is electrically driven to rotate and connected to the side surface of the stand (2). Both ends of the rotating disk (3-1) are horizontally fixedly connected to a fixing rod (3-2). One end of the fixing rod (3-2) is provided with a transmission frame (3-3), and an adjustment seat (3-4) is provided inside the transmission frame (3-3) through a linear drive connection.

2. The groove grinding machine for machining precision bearings according to claim 1, characterized in that, A first motor (3-5) is mounted on the side surface of the adjusting seat (3-4). A rotating shaft (3-6) is provided at the output end of the first motor (3-5). A driving block (3-7) is provided at one end of the rotating shaft (3-6). A grinding wheel (3-8) is fitted onto the driving block (3-7). The grinding wheel (3-8) and the driving block (3-7) are fixedly connected by bolts.

3. The groove grinding machine for machining precision bearings according to claim 1, characterized in that, The mounting assembly (4) includes a base (4-1) which is fixed to the surface of the frame (1). A movable frame (4-2) connected by a horizontal linear drive is provided inside the base (4-1). A second motor (4-3) is provided on the side surface of the movable frame (4-2).

4. A groove grinding machine for machining precision bearings according to claim 3, characterized in that, The output end of the second motor (4-3) is provided with a rotating frame (4-4). A pair of transmission grooves (4-5) are opened on the side surface of the rotating frame (4-4). A drive screw (4-6) is rotatably connected in the transmission groove (4-5). A slider (4-7) is provided in each of the transmission grooves (4-5).

5. A groove grinding machine for machining precision bearings according to claim 4, characterized in that, The slider (4-7) is connected by a linear sliding connection, and the slider (4-7) is connected to the drive screw (4-6) by a threaded connection. A clamping rod (4-8) is horizontally fixedly connected to the side surface of the slider (4-7).

6. A groove grinding machine for machining precision bearings according to claim 4, characterized in that, The side surface of the movable frame (4-2) is provided with an annular slide rail (5), and both ends of the side surface of the rotating frame (4-4) are provided with sliding sleeves (6), which are slidably connected to the annular slide rail (5).

7. A groove grinding machine for machining precision bearings according to claim 2, characterized in that, The cross-section of the connection between the drive block (3-7) and the grinding wheel (3-8) is polygonal.

8. A groove grinding machine for machining precision bearings according to claim 4, characterized in that, The drive screw (4-6) is provided with a screwing block (7) at one end. The drive screw (4-6) has a double-segment thread structure, and the thread directions at both ends of the drive screw (4-6) are opposite.

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