Automatic feeding and discharging mechanism for accurate grinding of ball screw supporting bearing

Abstract

The invention belongs to the technical field of accurate grinding machining, and particularly relates to an automatic feeding and discharging mechanism for accurate grinding of a ball screw supporting bearing. According to the scheme, the automatic feeding and discharging mechanism specifically comprises a machine base, an accurate grinding machine is installed at the top of the machine base, an accurate grinding box is arranged on the side face of the accurate grinding machine, and an accurate grinding wheel and a grinding fluid spraying pipe are arranged in the accurate grinding box; a rotary motor capable of moving telescopically is installed on the side face of the accurate grinding box, a feeding guide groove is formed in the side face of the accurate grinding box, and a limiting support distributed in an inclined mode is fixedly installed on the outer side of the feeding guide groove. The feeding mechanism and the discharging mechanism which are connected with the feeding mechanism are arranged, the bearing ring is in a closed state in the feeding and discharging processes of accurate grinding, transverse transferring is conducted through the pushing assembly and the positioning assembly, the risk that the bearing ring falls off and is damaged is effectively avoided, the workpiece transferring stroke is short, the waiting time of workpiece feeding and discharging is effectively shortened, and the working efficiency is improved. And the working efficiency of feeding and discharging in the bearing accurate grinding machining process is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of precision grinding, and particularly to an automatic loading and unloading mechanism for precision grinding of ball screw support bearings. Background Art

[0002] As a core functional component in the field of mechanical transmission, the ball screw is an ideal device for converting rotary motion into linear motion. Its basic structure consists of a screw, a nut, a ball circulation system, and a reverse device. By converting the sliding friction of the traditional trapezoidal screw into rolling friction, it significantly improves the transmission efficiency, motion accuracy, and reversibility characteristics. This unique mechanical property enables it to be widely used in high-precision fields such as numerical control machine tools, industrial robots, and aerospace equipment.

[0003] In the manufacturing process of ball screw support bearings, the precision grinding of bearing rings is a key process to ensure the accuracy of the final product. This process needs to eliminate macroscopic defects (such as surface waviness, roundness error, etc.) generated in the rough grinding stage and strictly control the depth of subsurface damage. The existing technology generally uses a jaw-type loading and unloading mechanism, which relies on the clamping force and the static friction force on the workpiece surface for positioning. However, when facing the annular bearing ring, this clamping method has significant defects: on the one hand, it is difficult to accurately position the geometric center of the annular workpiece, which is likely to cause clamping eccentricity; on the other hand, the friction coefficient decreases in the lubricating environment of grinding fluid, greatly increasing the risk of workpiece slipping. According to industry statistics, the processing rejection rate caused by such clamping failures can reach 3% - 5%, and there is also a safety hazard of damaging precision grinding equipment.

[0004] In view of the above technical bottlenecks, the present invention proposes a new automatic loading and unloading mechanism for precision grinding of ball screw support bearings, which effectively solves the problems such as insufficient positioning accuracy and workpiece falling risk existing in the traditional clamping method through an innovative positioning and clamping scheme. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes an automatic loading and unloading mechanism for precision grinding of ball screw support bearings.

[0006] An automatic loading and unloading mechanism for precision grinding of ball screw support bearings proposed by the present invention includes a machine base. A precision grinding machine is installed on the top of the machine base, and a precision grinding box is arranged on the side of the precision grinding machine. A precision grinding wheel and a grinding fluid spray pipe are arranged inside the precision grinding box. A rotatable motor capable of telescopic movement is installed on the side of the precision grinding box. A feeding guide groove is arranged on the side of the precision grinding box, and an inclined distribution limiting bracket is fixedly installed outside the feeding guide groove. An inlet cylinder is fixedly installed on the top of the limiting bracket, and a feeding mechanism is slidably installed inside the limiting bracket. A displacement sensor for detecting the downward stroke of the feeding mechanism is also installed inside the limiting bracket. A positioning component capable of horizontal movement is arranged inside the feeding mechanism. The top of the feeding mechanism is fixedly connected to the inlet cylinder, and the bottom of the feeding mechanism penetrates inside the feeding guide groove. A feeding conveyor belt assembly and a blanking conveyor belt assembly are successively installed in the middle of the machine base. A feeding mechanism is installed between the side of the feeding conveyor belt assembly and the side of the feeding mechanism, and a pushing component is arranged at the bottom end of the feeding mechanism. A blanking mechanism is installed between the top of the blanking conveyor belt assembly and the bottom of the feeding mechanism.

[0007] Preferably, in the present invention, the feeding mechanism includes a feeding guide groove, an inclined feeding groove arranged at the upper end of the feeding guide groove, and a waiting material groove arranged at the lower end of the feeding guide groove. A guiding component corresponding to the inlet of the feeding mechanism is arranged at the end of the waiting material groove, and the pushing component is installed at the outer end position of the guiding component.

[0008] Preferably, in the present invention, the feeding conveyor belt assembly includes a feeding conveyor belt and feeding baffles fixedly installed on the feeding conveyor belt. The side of the feeding baffle corresponds to the inclined feeding groove, and an inlet cylinder is installed on the other side of the feeding baffle. The output end of the inlet cylinder is installed with a feeding push plate. The feeding conveyor belt assembly also includes a photoelectric sensor arranged at the inlet of the feeding guide groove.

[0009] Preferably, in the present invention, the guiding component includes a guiding cylinder body connecting the pushing component and the positioning component, and a closing plate slidably installed on the side of the guiding cylinder body. A closing cylinder for driving the closing plate to move back and forth is installed on the side of the waiting material groove.

[0010] Preferably, in the present invention, the pushing component includes an annular bracket fixedly installed at the outer end of the guiding cylinder body, and a pushing cylinder fixedly installed on the annular bracket. The output end of the pushing cylinder is fixedly installed with a pushing core rod. The pushing component also includes a pushing ring slidably installed inside the guiding cylinder body. The pushing core rod is slidably connected to the pushing ring, and a return spring is installed between the pushing ring and the annular bracket.

[0011] Preferably, in the present invention, an annular groove is provided inside the pushing ring, and a core rod end cover is slidably installed inside the annular groove. The core rod end cover is fixedly connected to the pushing core rod. Annularly-arrayed mounting grooves are provided on the outer walls of the pushing core rod and the core rod end cover, and V-shaped shaft center positioning members are rotatably installed inside the mounting grooves. Springs are installed between the shaft center positioning members and the mounting grooves.

[0012] Preferably, in the present invention, the feeding mechanism includes a feeding support, and an annular feeding cavity is provided at the bottom of the feeding support. The positioning assembly is installed at the axial center position of the feeding cavity. A plurality of dispersion holes connected to the feeding cavity are also provided in the middle of the feeding support, and a three-way solenoid valve is fixedly installed on the side of the converging portion of the dispersion holes. An air inlet pipe and a liquid inlet pipe are sequentially connected to the inlet of the three-way solenoid valve.

[0013] Preferably, in the present invention, the positioning assembly includes a positioning cylinder installed on the outer side of the feeding support and a material discharging ring installed on the inner wall of the feeding cavity. The output end of the positioning cylinder is fixedly installed with a rotating shaft, and a positioning core rod is fixedly installed on the outer side of the rotating shaft. A conical-shaped positioning seat is provided in the middle of the positioning core rod, and a plurality of fan-shaped positioning claws are rotatably installed on the outer side of the positioning seat through torsion springs. An extrusion ring adapted to the positioning seat is provided on the outer side of the output shaft of the rotating motor.

[0014] Preferably, in the present invention, the blanking mechanism includes a support shaft fixedly installed below the limit support and a U-shaped discharging groove fixedly installed above the blanking conveyor belt assembly. A U-shaped movable hopper is installed on the outer side of the support shaft through a torsion spring, and the top of the movable hopper is adapted to the outer side of the feeding cavity. A discharging chute is fixedly installed at the end of the U-shaped discharging groove, and the discharging chute is slidably connected to the bottom of the movable hopper.

[0015] Preferably, in the present invention, the blanking conveyor belt assembly includes a blanking conveyor belt and a blanking baffle fixedly installed on the blanking conveyor belt. A blanking cylinder is installed on the side of the feeding baffle, and a blanking push plate is installed at the output end of the blanking cylinder.

[0016] Compared with the prior art, the present invention provides an automatic loading and unloading mechanism for precision grinding of ball screw support bearings, which has the following beneficial effects: In the present invention, a feeding mechanism and a blanking mechanism connected to the feeding mechanism are provided. The loading and unloading process of the bearing ring during fine grinding is in a closed state, and lateral transfer is performed through a pushing component and a positioning component. Among them, when the bearing ring horizontally moves on the feeding conveyor belt component to the side of the feeding mechanism, it is laterally transferred into the feeding mechanism. The bearing ring is rolled and conveyed in the feeding mechanism to the feeding side position of the feeding mechanism, and is laterally pushed into the feeding mechanism by the pushing component. At this time, the bearing ring is fixed on the positioning component. Subsequently, the feeding cylinder drives the feeding mechanism to move downward along the direction of the limit bracket, and the bottom end of the feeding mechanism is inserted into the feeding guide groove, and the bottom end of the feeding mechanism seals the opening of the feeding guide groove. After that, the rotating motor moves horizontally, and the outer end of the output shaft of the rotating motor is inserted into one end of the positioning component to fix the bearing ring and drive the bearing ring to rotate, and cooperate with the fine grinding wheel and the fine grinding wheel to perform effective fine grinding treatment on the bearing ring. When the fine grinding of the bearing ring is completed, the feeding mechanism returns to the position above the limit bracket. After the positioning component pushes the bearing ring away, the bearing ring falls into the blanking mechanism and is transferred to the blanking conveyor belt component, completing the loading and unloading operation of the bearing ring. There is no clamping and hanging state during the movement of the bearing ring, effectively avoiding the risk of the bearing ring falling and being damaged, and the workpiece transfer stroke is short, effectively reducing the waiting time for workpiece loading and unloading, and improving the working efficiency of loading and unloading during the fine grinding process of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 2 FIG. is a schematic diagram of the downward movement of the feeding mechanism of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 3 FIG. is a schematic structural diagram of the limit bracket of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 4 FIG. is a schematic structural diagram of the blanking mechanism of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 5 FIG. is a schematic structural diagram of the feeding mechanism of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 6 FIG. is a schematic structural diagram of the guiding component of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 7 FIG. is a schematic structural diagram of the feeding mechanism of an automatic loading and unloading mechanism for fine grinding of a ball screw support bearing proposed by the present invention; Figure 8Schematic diagram of the distribution of the pushing component and the positioning component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention; Figure 9 Schematic diagram of the pushing component and the positioning component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention transferring workpieces; Figure 10 Schematic diagram of the structure of the positioning component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention; Figure 11 Schematic side view of the structure of the positioning component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention; Figure 12 Schematic diagram of the structure of the pushing component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention; Figure 13 Schematic sectional view of the structure of the pushing component of an automatic loading and unloading mechanism for precision grinding of a ball screw support bearing proposed by the present invention.

[0018] In the figure: 1 machine base, 2 precision grinding box, 3 feeding guide groove, 4 unloading mechanism, 41 U-shaped discharge groove, 42 discharge chute, 43 support shaft, 44 movable hopper, 5 unloading conveyor belt assembly, 6 feeding conveyor belt assembly, 7 feeding mechanism, 71 feeding guide groove, 72 inclined feeding groove, 73 waiting material groove, 74 guiding component, 741 guiding cylinder body, 742 closing plate, 743 closing cylinder, 75 pushing component, 751 pushing cylinder, 752 annular bracket, 753 pushing core rod, 754 pushing ring, 755 annular groove, 756 core rod end cover, 757 mounting groove, 758 axial center positioning part, 759 spring, 8 feeding cylinder, 9 feeding mechanism, 91 feeding bracket, 92 feeding cavity, 93 dispersing hole, 94 three-way solenoid valve, 95 positioning component, 951 positioning cylinder, 952 rotating shaft, 953 positioning core rod, 954 positioning seat, 955 positioning claw, 956 unloading ring, 10 limiting bracket, 11 rotating motor, 12 precision grinding wheel, 13 precision grinding machine. Specific embodiments

[0019] The following details the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0020] Refer to Figures 1-13, an automatic loading and unloading mechanism for precision grinding of ball screw support bearings, including a machine base 1. A precision grinding machine 13 is installed on the top of the machine base 1, and a precision grinding box 2 is arranged on the side of the precision grinding machine 13. Inside the precision grinding box 2, there are a precision grinding wheel 12 and a grinding fluid spray pipe. A solenoid valve for controlling the flow rate is installed in the middle of the grinding fluid spray pipe. A rotatable motor 11 capable of telescopic movement is installed on the side of the precision grinding box 2. A feeding guide groove 3 is arranged on the side of the precision grinding box 2, and an inclined distribution limiting bracket 10 is fixedly installed outside the feeding guide groove 3. A feeding cylinder 8 is fixedly installed on the top of the limiting bracket 10, and a feeding mechanism 9 is slidably installed inside the limiting bracket 10. A displacement sensor for detecting the downward stroke of the feeding mechanism 9 is also installed inside the limiting bracket 10. Inside the feeding mechanism 9, there is a positioning component 95 capable of horizontal movement. The top of the feeding mechanism 9 is fixedly connected to the feeding cylinder 8, and the bottom of the feeding mechanism 9 penetrates inside the feeding guide groove 3. In the middle of the machine base 1, a feeding conveyor belt assembly 6 and a blanking conveyor belt assembly 5 are successively installed. An feeding mechanism 7 is installed between the side of the feeding conveyor belt assembly 6 and the side of the feeding mechanism 9, and a pushing component 75 is arranged at the bottom end of the feeding mechanism 7. A blanking mechanism 4 is installed between the top of the blanking conveyor belt assembly 5 and the bottom of the feeding mechanism 9.

[0021] In the present invention, there are a feeding mechanism 7 and a blanking mechanism 4 connected to the feeding mechanism 9. During the loading and unloading process of the bearing ring precision grinding, it is in a closed state, and horizontal transfer is carried out through the pushing component 75 and the positioning component 95. Among them, when the bearing ring horizontally moves on the feeding conveyor belt assembly 6 to the side of the feeding mechanism 7, it is horizontally transferred into the feeding mechanism 7. The bearing ring is roll-transported in the feeding mechanism 7 to the feeding side position of the feeding mechanism 9 and is horizontally pushed into the feeding mechanism 9 by the pushing component 75. At this time, the bearing ring is fixed on the positioning component 95. Subsequently, the feeding cylinder 8 drives the feeding mechanism 9 to move downward along the direction of the limiting bracket 10. A displacement sensor for detecting the downward stroke of the feeding mechanism 9 is also installed inside the limiting bracket 10 to ensure that the contact pressure between the precision grinding wheel 12 and the bearing ring is constant. The bottom end of the feeding mechanism 9 is inserted into the feeding guide groove 3, and the bottom end of the feeding mechanism 9 blocks the opening of the feeding guide groove 3. After that, the rotatable motor 11 moves horizontally, and the outer end of the output shaft of the rotatable motor 11 penetrates into one end of the positioning component 95 to fix the bearing ring and drive the bearing ring to rotate. Cooperating with the precision grinding wheel 12 and the precision grinding wheel 12, effective precision grinding treatment is carried out on the bearing ring. When the precision grinding of the bearing ring is completed, the feeding mechanism 9 resets to the position above the limiting bracket 10. After the positioning component 95 pushes the bearing ring away, the bearing ring falls into the blanking mechanism 4 and is transferred to the blanking conveyor belt assembly 5 to complete the loading and unloading operation of the bearing ring. There is no clamping and suspension state during the movement of the bearing ring, effectively avoiding the risk of the bearing ring falling and being damaged, and the workpiece transfer stroke is short, effectively reducing the waiting time for workpiece loading and unloading and improving the working efficiency of loading and unloading during the precision grinding process of the bearing.

[0022] As a further solution in the present invention, the feeding mechanism 7 includes a feeding guide groove 71, an inclined feeding groove 72 provided at the upper end of the feeding guide groove 71, a material waiting groove 73 provided at the lower end of the feeding guide groove 71. A guiding component 74 corresponding to the inlet of the feeding mechanism 9 is provided at the end of the material waiting groove 73. A pushing component 75 is installed at the outer end position of the guiding component 74. The feeding conveyor belt component 6 further includes a photoelectric sensor provided at the inlet of the feeding guide groove 71, which triggers the pushing action of the feeding cylinder after detecting the in-place signal of the bearing race. In the present invention, the bearing race is pushed from the feeding conveyor belt component 6 into the inclined feeding groove 72, and becomes a horizontal rolling conveyance in the inclined feeding groove 72. After being conveyed by the feeding guide groove 71, it is horizontally arranged in the material waiting groove 73. The outermost bearing race enters the guiding component 74, and the pushing component 75 laterally pushes it into the feeding mechanism 9, and cooperates with the positioning component 95 to complete the transfer operation of the workpiece.

[0023] As a further solution in the present invention, the feeding conveyor belt component 6 includes a feeding conveyor belt, and a feeding baffle fixedly installed on the feeding conveyor belt. The side of the feeding baffle corresponds to the inclined feeding groove 72. A feeding cylinder is installed on the other side of the feeding baffle, and a feeding push plate is installed at the output end of the feeding cylinder. In the present invention, the workpiece moves horizontally on the feeding conveyor belt, stops when it encounters the feeding baffle, and then the feeding cylinder drives the feeding push plate to move laterally, and the workpiece is pushed into the inclined feeding groove 72, and slides along the inner wall of the inclined feeding groove 72 into the feeding guide groove 71 for rolling transfer.

[0024] As a further solution in the present invention, the guiding component 74 includes a guiding cylinder body 741 connecting the pushing component 75 and the positioning component 95, and a closing plate 742 slidably installed on the side of the guiding cylinder body 741. A closing cylinder 743 for driving the closing plate 742 to move back and forth is installed on the side of the material waiting groove 73. In the present invention, when the bearing race moves into the guiding cylinder body 741, both sides of the bearing race are in a standing state under the limiting action of the closing plate 742 and the pushing component 75 respectively. Subsequently, the pushing component 75 approaches the bearing race and fixes it. Then, the closing plate 742 moves backward under the action of the closing cylinder 743. At this time, the pushing component 75 can drive the bearing race to move towards the positioning component 95.

[0025] As a further solution in the present invention, the material pushing assembly 75 includes an annular bracket 752 fixedly installed at the outer end of the material guiding cylinder body 741, and a material pushing cylinder 751 fixedly installed on the annular bracket 752. The material pushing assembly 75 further includes a pressure relay for controlling the material pushing cylinder 751. The output end of the material pushing cylinder 751 is fixedly installed with a material pushing core rod 753. The material pushing assembly 75 further includes a material pushing ring 754 slidably installed inside the material guiding cylinder body 741. The material pushing core rod 753 is slidably connected to the material pushing ring 754, and a return spring is installed between the material pushing ring 754 and the annular bracket 752. In the present invention, in the initial state, the material pushing core rod 753 is flush with the outer surface of the material pushing ring 754, and the compression return spring is in a contracted state. When pushing the material, the material pushing cylinder 751 drives the material pushing core rod 753 to move forward. At this time, the other side of the bearing race is blocked by the closing plate 742. The material pushing core rod 753 is inserted into the inner side of the bearing race to fix it. Subsequently, the closing plate 742 is opened, and the bearing race is pushed to the positioning assembly 95 by the material pushing ring 754 until the other side of the bearing race is sleeved on the outer side of the positioning assembly 95, completing the positioning transfer operation of the bearing race. After that, the material pushing cylinder 751 drives the material pushing core rod 753 and the material pushing ring 754 to reset.

[0026] As a further solution in the present invention, an annular groove 755 is provided inside the pushing ring 754, and a core rod end cover 756 is slidably installed inside the annular groove 755. The core rod end cover 756 is fixedly connected to the pushing core rod 753. Installation grooves 757 are provided on the outer walls of the pushing core rod 753 and the core rod end cover 756 in an annular array, and V-shaped axial center positioning members 758 are rotatably installed inside the installation grooves 757. Springs 759 are installed between the axial center positioning members 758 and the installation grooves 757. In the present invention, one end of the axial center positioning member 758 generates a thrust outward under the action of the spring 759. After one end of the pushing core rod 753 is inserted into the bearing race, the axial center positioning member 758 then moves outward inside the bearing race, and the core rod end cover 756 continuously moves towards the innermost end of the annular groove 755 until one end of the core rod end cover 756 located inside the annular groove 755 receives a downward pressure. At this time, the other end of the axial center positioning member 758 extends to the maximum pressure outward at the inner ring of the bearing race. The annularly distributed axial center positioning members 758 can lift the bearing race away from the material guiding cylinder body 741. At this time, the positioning assembly 95, the bearing race, the pushing core rod 753, and the pushing ring 754 are at the same axial center height, avoiding friction between the outer wall of the bearing race and the material guiding cylinder body 741 when pushing the bearing race towards the positioning assembly 95. When the other end of the bearing race is sleeved outside the positioning assembly 95, the pushing core rod 753 and the core rod end cover 756 slide backward inside the pushing ring 754, and the pushing ring 754 maintains an outward thrust under the action of the return spring, thereby pushing the axial center positioning member 758 back into the installation groove 757 until the core rod end cover 756 moves to the outermost end of the annular groove 755 and drives the pushing ring 754 to retreat synchronously. At this time, the outer surface of the pushing core rod 753 is flush with the outer surface of the pushing ring 754, making the outer ring of the bearing race in a suspended state when the bearing race moves towards the positioning assembly 95 by the pushing assembly 75, avoiding friction damage on the surface of the bearing race and improving the stability during the transfer of the bearing race.

[0027] As a further solution in the present invention, the feeding mechanism 9 includes a feeding support 91, and a feeding cavity 92 with an annular structure is arranged at the bottom of the feeding support 91. The positioning assembly 95 is installed at the axial center position of the feeding cavity 92. A plurality of dispersion holes 93 connected to the feeding cavity 92 are also arranged in the middle of the feeding support 91. A three-way solenoid valve 94 is fixedly installed on the side of the converging part of the dispersion holes 93. An air inlet pipe and a liquid inlet pipe are sequentially connected to the inlet of the three-way solenoid valve 94. In the present invention, when the feeding mechanism 9 is in the highest position, the positioning assembly 95 and the pushing assembly 75 are coaxially arranged. The positioning assembly 95 drives the bearing ring to move into the interior of the fine grinding box 2, and the fine grinding wheel 12 can be inserted into the feeding cavity 92 to perform fine grinding on the bearing ring outside the positioning assembly 95. At the same time, grinding fluid is sprayed from the dispersion holes 93 to cool and finely grind the outside of the bearing ring. After the fine grinding is completed, air is used to blow and clean the bearing ring and the interior of the feeding cavity 92 until the feeding mechanism 9 moves to the highest position for the blanking operation, reducing the loss and pollution of the grinding fluid.

[0028] As a further solution in the present invention, the positioning assembly 95 includes a positioning cylinder 951 installed outside the feeding support 91 and a blanking ring 956 installed on the inner wall of the feeding cavity 92. The output end of the positioning cylinder 951 is fixedly installed with a rotating shaft 952, and a positioning core rod 953 is fixedly installed on the outside of the rotating shaft 952. A positioning seat 954 with a frustum-shaped structure is arranged in the middle of the positioning core rod 953, and a plurality of fan-shaped positioning claws 955 are rotatably installed on the outside of the positioning seat 954 through torsion springs. An extrusion ring adapted to the positioning seat 954 is arranged on the outside of the output shaft of the rotating motor 11. In the present invention, the pushing assembly 75 drives the bearing ring to move towards the positioning assembly 95, and the positioning core rod 953 is inserted into the interior of the bearing ring. At this time, the plurality of positioning claws 955 move backward until they are engaged with the inner wall of the bearing ring. When the pushing assembly 75 retracts, the bearing ring is left on the positioning assembly 95. Subsequently, the positioning assembly 95 moves backward until the bearing ring is in the central area of the feeding cavity 92. When the positioning assembly 95 drives the bearing ring to move into the fine grinding box 2, the output shaft of the rotating motor 11 approaches the positioning assembly 95, and the extrusion ring pushes the inner wall of the positioning claws 955 to generate a pressure for outward expansion, completing the fine grinding preparation operation and driving the bearing ring to rotate during the fine grinding process, improving the stability of the bearing ring during the fine grinding process. After the fine grinding is completed, the rotating motor 11 is separated from the positioning assembly 95. When the positioning assembly 95 moves to the highest position, the positioning core rod 953 continues to move backward, and the blanking ring 956 is used to push the bearing ring away. The bearing ring then falls into the blanking mechanism 4 to complete the blanking operation.

[0029] As a further solution in the present invention, the blanking mechanism 4 includes a support shaft 43 fixedly installed below the position of the limit bracket 10, and a U-shaped discharge chute 41 fixedly installed above the blanking conveyor belt assembly 5. An activity hopper 44 with a U-shaped structure is installed on the outer side of the support shaft 43 through a torsion spring, and the top of the activity hopper 44 is adapted to the outer side of the feeding cavity 92. A discharge chute 42 is fixedly installed at the end of the U-shaped discharge chute 41, and the discharge chute 42 is slidably connected to the bottom of the activity hopper 44. In the present invention, when blanking, the bearing race falls from the feeding cavity 92 of the feeding mechanism 9, rolls to the U-shaped discharge chute 41 through the guidance of the activity hopper 44 and the discharge chute 42, and falls into the blanking conveyor belt assembly 5 at the bottom of the U-shaped discharge chute 41 for horizontal conveying and blanking operation. When the feeding mechanism 9 moves downward, it squeezes the activity hopper 44 to rotate and contract downward, and the opening of the activity hopper 44 is blocked by the bottom of the feeding mechanism 9 to prevent grinding fluid and the like from splashing into the activity hopper 44.

[0030] As a further solution in the present invention, the blanking conveyor belt assembly 5 includes a blanking conveyor belt and a blanking baffle fixedly installed on the blanking conveyor belt. A blanking cylinder is installed on the side of the feeding baffle, and a blanking push plate is installed at the output end of the blanking cylinder. In the present invention, the workpiece is transferred to the blanking conveyor belt by the blanking mechanism 4 for horizontal movement. When it moves to the outermost end, it is stopped by the blanking baffle, and then is pushed away from the blanking conveyor belt by the blanking cylinder and the blanking push plate and transferred to the next process.

[0031] During use, when the bearing race horizontally moves on the feeding conveyor belt assembly 6 to the side of the feeding mechanism 7, it is laterally transferred into the feeding mechanism 7. The bearing race is rolled and conveyed in the feeding mechanism 7 to the feeding side position of the feeding mechanism 9, and is laterally pushed into the feeding mechanism 9 by the pushing component 75. At this time, the bearing race is fixed on the positioning component 95. Subsequently, the feeding cylinder 8 drives the feeding mechanism 9 to move downward along the direction of the limit bracket 10. The bottom end of the feeding mechanism 9 is inserted into the feeding guide groove 3, and the bottom end of the feeding mechanism 9 blocks the opening of the feeding guide groove 3. After that, the rotating motor 11 moves horizontally, and the outer end of the output shaft of the rotating motor 11 penetrates into one end of the positioning component 95 to fix the bearing race and drive the bearing race to rotate. The bearing race is effectively precision ground by cooperating with the precision grinding wheels 12 and 12. When the precision grinding of the bearing race is completed, the feeding mechanism 9 returns to the position above the limit bracket 10. After the positioning component 95 pushes the bearing race away, the bearing race falls into the blanking mechanism 4 and is transferred to the blanking conveyor belt assembly 5 to complete the loading and unloading operation of the bearing race.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An automatic loading and unloading mechanism for precision grinding of ball screw support bearings, including a machine base (1). A precision grinding machine (13) is installed on the top of the machine base (1), and a precision grinding box (2) is arranged on the side of the precision grinding machine (13). A precision grinding wheel (12) and a grinding fluid spray pipe are arranged inside the precision grinding box (2). A rotatable motor (11) capable of telescopic movement is installed on the side of the precision grinding box (2), characterized in that, A feeding guide groove (3) is arranged on the side of the fine grinding box (2), and an inclined distribution limiting bracket (10) is fixedly installed on the outer side of the feeding guide groove (3). An feeding cylinder (8) is fixedly installed at the top of the limiting bracket (10), and a feeding mechanism (9) is slidably installed inside the limiting bracket (10). A displacement sensor for detecting the downward stroke of the feeding mechanism 9 is also installed inside the limiting bracket (10). A positioning component (95) capable of horizontal movement is arranged inside the feeding mechanism (9). The top of the feeding mechanism (9) is fixedly connected with the feeding cylinder (8), and the bottom of the feeding mechanism (9) penetrates into the inside of the feeding guide groove (3). An feeding conveyor belt component (6) and a blanking conveyor belt component (5) are sequentially installed in the middle of the machine base (1). An feeding mechanism (7) is installed between the side surface of the feeding conveyor belt component (6) and the side surface of the feeding mechanism (9), and a pushing component (75) is arranged at the bottom end of the feeding mechanism (7). A blanking mechanism (4) is installed between the top of the blanking conveyor belt component (5) and the bottom of the feeding mechanism (9).

2. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 1, wherein, The feeding mechanism (7) includes a feeding guide groove (71), an inclined feeding groove (72) arranged at the upper end of the feeding guide groove (71), and a material waiting groove (73) arranged at the lower end of the feeding guide groove (71). A guiding component (74) corresponding to the inlet of the feeding mechanism (9) is arranged at the end of the material waiting groove (73), and the pushing component (75) is installed at the outer end position of the guiding component (74).

3. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 2, characterized in that, The feeding conveyor belt component (6) includes a feeding conveyor belt and feeding baffles fixedly installed on the feeding conveyor belt. The side surface of the feeding baffle corresponds to the inclined feeding groove (72), and an feeding cylinder is installed on the other side surface of the feeding baffle. The output end of the feeding cylinder is installed with a feeding push plate. The feeding conveyor belt component (6) further includes a photoelectric sensor arranged at the inlet of the feeding guide groove (71).

4. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 3, wherein, The guiding component (74) includes a guiding cylinder body (741) connecting the pushing component (75) and the positioning component (95), and a closing plate (742) slidably installed on the side surface of the guiding cylinder body (741). A closing cylinder (743) for driving the closing plate (742) to move back and forth is installed on the side surface of the material waiting groove (73).

5. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 4, wherein, The pushing component (75) includes an annular bracket (752) fixedly installed at the outer end of the guiding cylinder body (741), and a pushing cylinder (751) fixedly installed on the annular bracket (752). The output end of the pushing cylinder (751) is fixedly installed with a pushing core rod (753). The pushing component (75) further includes a pushing ring (754) slidably installed inside the guiding cylinder body (741). The pushing core rod (753) is slidably connected with the pushing ring (754), and a return spring is installed between the pushing ring (754) and the annular bracket (752).

6. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 5, characterized in that, An annular groove (755) is provided on the inner side of the material pushing ring (754), and a core rod end cover (756) is slidably installed inside the annular groove (755). The core rod end cover (756) is fixedly connected to the material pushing core rod (753). Annularly-arrayed mounting grooves (757) are provided on the outer walls of the material pushing core rod (753) and the core rod end cover (756), and V-shaped axial positioning members (758) are rotatably installed inside the mounting grooves (757). Springs (759) are installed between the axial positioning members (758) and the mounting grooves (757).

7. An automatic loading and unloading mechanism for precision grinding of ball screw support bearings according to claim 1, characterized in that, The feeding mechanism (9) includes a feeding support (91), and an annular feeding cavity (92) is provided at the bottom of the feeding support (91). The positioning assembly (95) is installed at the axial center position of the feeding cavity (92). A plurality of dispersion holes (93) connected to the feeding cavity (92) are further provided in the middle of the feeding support (91), and a three-way solenoid valve (94) is fixedly installed on the side of the converging portion of the dispersion holes (93). An air inlet pipe and a liquid inlet pipe are sequentially connected to the inlet of the three-way solenoid valve (94).

8. An automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 7, characterized in that, The positioning assembly (95) includes a positioning cylinder (951) installed on the outer side of the feeding support (91) and a material discharging ring (956) installed on the inner wall of the feeding cavity (92). The output end of the positioning cylinder (951) is fixedly installed with a rotating shaft (952), and a positioning core rod (953) is fixedly installed on the outer side of the rotating shaft (952). A conical positioning seat (954) is provided in the middle of the positioning core rod (953), and a plurality of fan-shaped positioning claws (955) are rotatably installed on the outer side of the positioning seat (954) through torsion springs. An extrusion ring adapted to the positioning seat (954) is provided on the outer side of the output shaft of the rotating motor (11).

9. An automatic loading and unloading mechanism for precision grinding of ball screw support bearings according to claim 8, characterized in that, The blanking mechanism (4) includes a support shaft (43) fixedly installed below the limit support (10) and a U-shaped discharging chute (41) fixedly installed above the blanking conveyor belt assembly (5). A U-shaped movable hopper (44) is installed on the outer side of the support shaft (43) through a torsion spring, and the top of the movable hopper (44) is adapted to the outer side of the feeding cavity (92). A discharging chute (42) is fixedly installed at the end of the U-shaped discharging chute (41), and the discharging chute (42) is slidably connected to the bottom of the movable hopper (44).

10. The automatic loading and unloading mechanism for precision grinding of a ball screw support bearing according to claim 1, wherein, The blanking conveyor belt assembly (5) includes a blanking conveyor belt, a blanking baffle fixedly installed on the blanking conveyor belt, a blanking cylinder installed on the side of the feeding baffle, and a blanking push plate installed at the output end of the blanking cylinder.

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