Automobile wheel hub bearing processing production line

Abstract

The application discloses a kind of automobile wheel hub bearing processing production line, including sequentially arranged feeding unit, turning processing unit, grinding processing unit, assembly unit, detection unit;The grinding processing unit includes processing box and polishing belt, its inside is equipped with support plate, and the rotating clamp of bearing is installed on support plate, and polishing belt is located in the side of rotating clamp;It further includes the cooling mechanism connected with rotating clamp, is set in processing box, when rotating clamp is opened from the inside of bearing and is tight to bearing, cooling mechanism sprays cutting fluid on rotating clamp.This application grinding processing unit adopts rotating clamp and cooling mechanism linkage design, realizes automatic tightness and synchronous cooling under single motor drive, reduces the investment of power equipment and the participation of artificial.

Description

Technical Field

[0001] This invention relates to the field of automotive wheel hub bearing processing technology, and more particularly to an automotive wheel hub bearing processing production line. Background Technology

[0002] Automotive wheel bearings are critical load-bearing components of the vehicle chassis, and their machining precision directly determines the vehicle's driving stability and safety. As the automotive industry shifts towards lightweighting and electrification, the market demands increasingly higher processing efficiency and precision for wheel bearings. Currently, grinding is the core process in wheel bearing manufacturing to ensure product precision, and this process requires the coordinated operation of multiple machines.

[0003] Existing grinding processes require specialized fixtures to position and clamp wheel hub bearings, and corresponding power equipment is needed to provide power to the fixtures to ensure stable clamping. In order to reduce grinding temperature, reduce workpiece wear and improve the surface quality of the machined surface, an additional water pump is required to pump cutting fluid to cool and lubricate the grinding area.

[0004] The aforementioned methods require a large investment in equipment, with each piece of equipment operating independently and lacking coordination. This increases equipment purchase and maintenance costs and occupies a significant amount of production space. Furthermore, fixture operation relies entirely on manual labor, requiring workers to manually clamp, position, and disassemble workpieces. This is not only labor-intensive and time-consuming but also prone to positioning errors due to human error, affecting processing accuracy. Moreover, the low efficiency of manual labor makes it difficult to adapt to the demands of large-scale production, thus hindering the large-scale and intelligent development of the wheel hub bearing processing industry.

[0005] Therefore, this application proposes a production line for processing automotive wheel hub bearings. Summary of the Invention

[0006] The purpose of this invention is to solve the above-mentioned technical problems by proposing an automotive wheel hub bearing processing production line.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An automotive wheel hub bearing processing production line includes a feeding unit, a turning unit, a grinding unit, an assembly unit, and an inspection unit arranged sequentially. The grinding unit includes a processing box and a grinding belt. A support plate is installed inside the processing box, and a rotating fixture bearing a bearing is installed on the support plate. The grinding belt is located on one side of the rotating fixture. It also includes a cooling mechanism connected to the rotary fixture, which is located inside the machining box; when the rotary fixture opens from inside the bearing and tightens the bearing, the cooling mechanism sprays cutting fluid onto the rotary fixture and the machining area.

[0008] Preferably, the rotary clamp includes a first piston cylinder that passes through and is rotatably connected to a support plate. A first movable piston is slidably connected inside the first piston cylinder. A first spring is fixed to the bottom of the first movable piston, and the other end of the first spring is fixedly connected to the inner bottom of the first piston cylinder. A rectangular rod is fixed to the upper end of the first movable piston. A guide ring is fixedly connected inside the first piston cylinder. The rectangular rod passes through the guide ring and is slidably connected to it. A conical column is fixed to the upper end of the rectangular rod. A support ring is fitted on the outer surface of the first piston cylinder and is fixedly connected to it. A wedge-shaped tensioning block that cooperates with the conical column is provided on the support ring. Moving the conical column upward will drive the four wedge-shaped tensioning blocks to move radially outward.

[0009] Preferably, the upper end of the support ring is provided with four guide grooves communicating with the interior of the support ring. A guide rod is fixed in the guide groove, and a slider is slidably connected in the guide groove. The guide rod passes through the slider and is slidably connected to it. The wedge-shaped tensioning block is fixed to the upper end of the slider, and a second spring is fixed on the slider. The other end of the second spring is fixedly connected to the inner wall of the guide groove.

[0010] Preferably, a first vertical plate is fixed to the bottom of the support plate, a motor is mounted on the first vertical plate, a first shaft is fixed to the output end of the motor, a first bevel gear is fixed on the first shaft, a second bevel gear is fixed on the first piston cylinder, and the first bevel gear meshes with the second bevel gear.

[0011] Preferably, the cooling mechanism includes a cutting fluid tank and a second piston cylinder installed inside the machining chamber. The second piston cylinder is connected to a first pipe and a second pipe. A tee is installed on the first pipe, one end of which is rotatably connected to the first piston cylinder, and a return pipe is installed on the other end of the tee. The return pipe is connected to the cutting fluid tank, and a solenoid valve for controlling the opening and closing of the return pipe is installed on the tee. The second pipe is connected to the cutting fluid tank. A horizontal plate is fixedly installed on the machining chamber, and a spray pipe is installed on the horizontal plate. An atomizing nozzle is installed on the spray pipe, and the spray pipe is connected to the second piston cylinder.

[0012] Preferably, a second vertical plate is fixed to the bottom of the support plate, and a second shaft rod is rotatably connected through the second vertical plate. A third bevel gear is fixed on the second shaft rod, and the third bevel gear meshes with the second bevel gear. A circular plate is fixed on the second shaft rod, and a connecting rod is eccentrically hinged to the circular plate. A second movable piston is slidably connected inside the second piston cylinder, and the connecting rod is hinged to the second movable piston.

[0013] Preferably, a liquid discharge check valve is installed on the first pipe, which only allows the cutting fluid to flow from the second piston cylinder to the first pipe.

[0014] Preferably, a one-way valve is installed on the second pipe, which only allows the cutting fluid in the cutting fluid tank to flow into the second pipe.

[0015] Preferably, a pressure relief valve is installed on the spray pipe.

[0016] Preferably, a collection pipe is installed through the support plate, a liquid collection hopper is installed at the upper end of the collection pipe, a filter screen is provided in the cutting fluid tank opposite to the collection pipe, and a second pipe is located on the other side of the filter screen.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The grinding unit adopts a rotating fixture and cooling mechanism linkage design to achieve automatic tensioning and synchronous cooling under single motor drive, simplifying the operation process, improving the stability of grinding, and reducing the labor intensity of workers.

[0018] 2. The cooling mechanism and the rotating fixture share the same power source, eliminating the need for additional cooling equipment such as water pumps, which significantly reduces equipment purchase and maintenance costs while saving production space.

[0019] 3. When the pressure inside the second piston cylinder exceeds the set value of the pressure relief valve, the cutting fluid automatically enters the spray pipe and is evenly sprayed onto the bearing and grinding area through the atomizing nozzle, achieving efficient cooling and lubrication without the need for additional power, further improving processing quality and efficiency.

[0020] 4. Waste cutting fluid is recycled, filtered, and reused through collection pipes, liquid collection hoppers, and filter screens, reducing cutting fluid waste and environmental pollution, lowering production costs, and meeting the requirements of green manufacturing and sustainable development.

[0021] In summary, the grinding unit of the present invention adopts a linkage design of rotary fixture and cooling mechanism to realize automatic tensioning and synchronous cooling under single motor drive, reducing the investment in power equipment and manual intervention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an automotive wheel hub bearing processing production line proposed in this invention; Figure 2 This is a front view structural diagram of the processing box in an automotive wheel hub bearing processing production line proposed in this invention; Figure 3 This is a schematic diagram of the structure of the first piston cylinder in an automotive wheel hub bearing processing production line proposed in this invention; Figure 4 This is a three-dimensional structural diagram of the processing box in an automotive wheel hub bearing processing production line proposed in this invention; Figure 5 This is a schematic diagram of the structure of the second moving piston in an automotive wheel hub bearing processing production line proposed in this invention; Figure 6 This is a schematic diagram of the support ring structure in an automotive wheel hub bearing processing production line proposed in this invention; Figure 7 This is a cross-sectional structural schematic diagram of a support ring in an automotive wheel hub bearing processing production line proposed in this invention; Figure 8 This is a schematic diagram of the structure of the first piston cylinder in an automotive wheel hub bearing processing production line proposed in this invention.

[0023] In the diagram: 1 Feeding unit, 2 Turning unit, 3 Grinding unit, 4 Assembly unit, 5 Inspection unit, 6 Support plate, 7 Baffle, 8 Grinding belt, 9 Cutting fluid tank, 10 Collection pipe, 11 Motor, 12 First vertical plate, 13 Second piston cylinder, 14 Second bevel gear, 15 First shaft, 16 First bevel gear, 17 Second vertical plate, 18 Support ring, 19 Wedge-shaped tensioning block, 20 Spray pipe, 21 Atomizing nozzle, 22 First piston cylinder, 23 Third bevel gear 24 Second shaft, 25 Circular plate, 26 Connecting rod, 27 Second pipe, 28 First pipe, 29 Liquid outlet check valve, 30 Solenoid valve, 31 Return pipe, 32 Liquid inlet check valve, 33 Three-way pipe, 34 Horizontal plate, 35 Liquid collecting hopper, 36 Second moving piston, 37 Guide groove, 38 Slider, 39 Guide rod, 40 Guide ring, 41 Through hole, 42 Rectangular rod, 43 First moving piston, 44 First spring, 45 Machining box, 46 Second spring, 47 Conical column. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Reference Figures 1-8 An automotive wheel hub bearing processing production line includes a feeding unit 1, a turning unit 2, a grinding unit 3, an assembly unit 4, and an inspection unit 5, which are connected in sequence. Each unit works in concert to complete the entire processing of the wheel hub bearing from raw material feeding to finished product inspection. The specific process is as follows: Feeding unit 1 is used to transport the wheel hub bearing blanks to be processed to the subsequent processing unit. Conventional feeding mechanisms such as conveyor belts and robotic arms can be used to realize automatic feeding of blanks, reduce manual intervention, and adapt to the needs of mass production.

[0026] The turning unit 2 receives the blanks conveyed by the feeding unit 1 and performs turning on the blanks to complete the preliminary forming of the inner and outer rings of the bearing, laying a precision foundation for subsequent grinding. Conventional CNC lathes can be used, along with corresponding turning tools, to ensure the turning dimensional accuracy.

[0027] Grinding unit 3 is the core processing unit of this production line. It is used to perform high-precision grinding on the turned bearings, correct turning errors, and improve the surface quality and dimensional accuracy of the bearings. Its structure will be described in detail below.

[0028] Assembly unit 4 receives the qualified bearing components after grinding and completes the assembly of the inner and outer rings, rolling elements, cage and other components of the bearing to form a complete hub bearing product.

[0029] Inspection unit 5 conducts comprehensive inspections on the assembled wheel hub bearings, including key indicators such as dimensional accuracy, rotational accuracy, and sealing performance. Unqualified products are screened out to ensure that the products leaving the factory meet quality standards.

[0030] The specific structure of grinding unit 3 is as follows: The grinding unit 3 addresses the issues of poor equipment coordination and independent cooling and clamping structures in existing grinding processes. Specifically, it includes a processing box 45, a grinding belt 8, a support plate 6, a rotating fixture, and a cooling mechanism. The connection relationships, structural details, and working principles of each component are as follows: The machining box 45 provides a closed space for grinding, preventing cutting fluid from splashing and chips from spreading during grinding, and ensuring a clean machining environment. The support plate 6 is fixedly installed inside the machining box 45 to support the rotating fixture, drive mechanism and some cooling mechanism components, providing a stable mounting reference for each component. It can be installed using conventional methods such as bolt fixing and welding to ensure that it does not shake during machining and to ensure machining accuracy.

[0031] The rotary clamp is used to position and clamp the wheel hub bearing, and drives the bearing to rotate synchronously. It works in conjunction with the grinding belt 8 to complete the grinding process. Its structure balances clamping stability and ease of operation. Specifically, it includes a first piston cylinder 22, a first moving piston 43, a first spring 44, a rectangular rod 42, a guide ring 40, a conical column 47, a support ring 18, a wedge-shaped tensioning block 19, a guide groove 37, a guide rod 39, a slider 38, and a second spring 46. The connection and working process of each component are as follows: The first piston cylinder 22 passes vertically through the support plate 6 and is rotatably connected to it. Rotation is achieved through bearing engagement, reducing rotational friction. The first movable piston 43 is slidably connected inside the first piston cylinder 22, with its bottom fixedly connected to one end of the first spring 44. The other end of the first spring 44 is fixedly connected to the bottom of the first piston cylinder 22. When the first spring 44 is in its natural state, it can push the first movable piston 43 to its initial position. A rectangular rod 42 is fixed to the upper end of the first movable piston 43, and a guide ring 40 is fixed inside the first piston cylinder 22. The guide ring 40 has multiple through holes 41 for air circulation within the first piston cylinder 22. The rectangular rod 42 passes through the guide ring 40 and is slidably connected to it. The guide ring 40 guides the movement of the rectangular rod 42, preventing it from shifting during vertical movement and ensuring the precise trajectory of the conical column 47. The conical column 47 is fixed to the upper end of the rectangular rod 42, and its outer surface has a conical structure, used to drive the wedge-shaped tensioning block 19 to move radially.

[0032] A support ring 18 is fitted onto the outer surface of the first piston cylinder 22 and fixedly connected thereto. The upper end of the support ring 18 has four evenly distributed guide grooves 37, which communicate with the interior of the support ring 18. A guide rod 39 is fixed within each guide groove 37. A slider 38 is slidably connected within the guide groove 37, and the guide rod 39 passes through and slidably connects to the slider 38. The guide rod 39 cooperates with the guide groove 37 to guide the movement of the slider 38, ensuring that the slider 38 can only move radially. A wedge-shaped tensioning block 19 is fixed to the upper end of the slider 38, its inner side fitting against the conical surface of the conical column 47. The outer side of the wedge-shaped tensioning block 19 is used to contact the inner ring of the wheel hub bearing to achieve tensioning and positioning. A second spring 46 is fixed to the slider 38, with its other end fixedly connected to the inner wall of the guide groove 37. When the second spring 46 is in its natural state, it can push the slider 38 and the wedge-shaped tensioning block 19 towards the conical column 47, causing the wedge-shaped tensioning block 19 to be in a contracted state, facilitating bearing clamping and disassembly.

[0033] A first vertical plate 12 is fixed to the bottom of the support plate 6. A motor 11 is mounted on the first vertical plate 12. The motor 11 provides power for the rotation of the rotary fixture. Its output end is fixedly connected to the first shaft 15. A first bevel gear 16 is fixed on the first shaft 15, and a second bevel gear 14 is fixed on the first piston cylinder 22. The first bevel gear 16 and the second bevel gear 14 mesh to form a bevel gear transmission mechanism, which transmits the power of the motor 11 to the first piston cylinder 22, driving the first piston cylinder 22 and the entire rotary fixture to rotate synchronously.

[0034] When clamping the bearing, the hub bearing is placed on the outside of the four wedge-shaped tensioning blocks 19. The tapered column 47 moves upward, and its tapered surface generates a radial thrust on the wedge-shaped tensioning blocks 19, pushing the slider 38 to move away from the tapered column 47 along the guide groove 37, stretching the second spring 46 until the outside of the wedge-shaped tensioning blocks 19 is tightly fitted with the inner ring of the bearing, thus achieving bearing tensioning and positioning.

[0035] The motor 11 drives the first shaft 15 and the first bevel gear 16 to rotate. The first bevel gear 16 drives the meshing second bevel gear 14 to rotate, which in turn drives the first piston cylinder 22, the support ring 18, the wedge-shaped tensioning block 19 and the clamped bearing to rotate synchronously, and completes the bearing grinding process in conjunction with the grinding belt 8 on one side.

[0036] The cooling mechanism works in conjunction with the rotating fixture to spray cutting fluid onto the rotating fixture and the bearing grinding area during bearing grinding, achieving cooling and lubrication, reducing workpiece wear, and improving the surface finish. Its core advantage is that it shares a power source with the rotating fixture, eliminating the need for an additional water pump and reducing equipment investment. Both the cutting fluid tank 9 and the second piston cylinder 13 are installed inside the machining chamber 45. The cutting fluid tank 9 stores the cutting fluid; the second piston cylinder 13 is connected to the first pipe 28 and the second pipe 27, respectively. The outlet check valve 29 only allows cutting fluid to flow from the second piston cylinder 13 to the first pipe 28, preventing backflow and ensuring stable cutting fluid delivery. The inlet check valve 32 only allows cutting fluid to flow from the cutting fluid tank 9 to the second pipe 27, preventing cutting fluid in the second piston cylinder 13 from flowing back into the cutting fluid tank 9, ensuring smooth negative pressure suction.

[0037] The second pipe 27 is connected to the cutting fluid tank 9 and is used to introduce the cutting fluid in the cutting fluid tank 9 into the second piston cylinder 13. A three-way pipe 33 is installed on the first pipe 28. One end of the three-way pipe 33 is rotatably connected to the first piston cylinder 22 (it can be fitted with a rotary joint to ensure that the pipe connection is not affected when the first piston cylinder 22 rotates). The other end of the three-way pipe 33 is connected to the return pipe 31, which is connected to the cutting fluid tank 9. A solenoid valve 30 is installed on the three-way pipe 33 to control the opening and closing of the return pipe 31. The horizontal plate 34 is fixed on the machining box 45. The spray pipe 20 is installed on the horizontal plate 34. Multiple atomizing nozzles 21 are evenly installed on the spray pipe 20. The atomizing nozzles 21 face the rotating fixture and bearing grinding area. The spray pipe 20 is connected to the second piston cylinder 13 and is used to transport the cutting fluid in the second piston cylinder 13 to the atomizing nozzles 21, and spray it onto the machining area after atomization.

[0038] A baffle 7 is fixed on the support plate 6 to block the cutting fluid and prevent it from leaking out from the front.

[0039] The pressure relief valve can adjust the pressure relief according to actual processing needs, adapting to the cooling requirements of different grinding conditions.

[0040] The second vertical plate 17 is fixed to the bottom of the support plate 6. The second shaft 24 passes through the second vertical plate 17 and is rotatably connected to it. The third bevel gear 23 is fixed on the second shaft 24 and meshes with the second bevel gear 14. With the help of the rotation of the second bevel gear 14, the third bevel gear 23 and the second shaft 24 are driven to rotate synchronously. The circular plate 25 is fixed on the second shaft 24. One end of the connecting rod 26 is eccentrically hinged to the circular plate 25, and the other end is hinged to the second moving piston 36. The second moving piston 36 is slidably connected inside the second piston cylinder 13 to form a crank-slider mechanism, which converts the rotational motion of the second shaft 24 into the reciprocating linear motion of the second moving piston 36.

[0041] During grinding, the second bevel gear 14 rotates simultaneously, driving the third bevel gear 23, the second shaft 24, and the circular plate 25 to rotate synchronously. The circular plate 25, through the connecting rod 26, drives the second moving piston 36 to reciprocate linearly within the second piston cylinder 13. When the second moving piston 36 moves away from the second pipe 27, a negative pressure is formed inside the second piston cylinder 13. At this time, the inlet check valve 32 opens and the outlet check valve 29 closes, allowing the cutting fluid in the cutting fluid tank 9 to be drawn into the second piston cylinder 13 through the second pipe 27. When the second moving piston 36 moves closer to the second pipe 27, the internal pressure of the second piston cylinder 13 increases. At this time, the outlet check valve 29 opens and the inlet check valve 32 closes. The cutting fluid in the second piston cylinder 13 is transported to the three-way pipe 33 through the first pipe 28. The cutting fluid enters the first piston cylinder 22 through the three-way pipe 33. The increased pressure in the first piston cylinder 22 drives the first moving piston 43 to move upward, which in turn pushes the rectangular rod 42 and the conical column 47 to move upward. The conical surface of the conical column 47 generates a radial thrust on the wedge-shaped tensioning block 19, pushing the slider 38 to move away from the conical column 47 along the guide groove 37, stretching the second spring 46 until the outer side of the wedge-shaped tensioning block 19 is tightly fitted with the inner ring of the bearing, completing the bearing tensioning and positioning.

[0042] After the bearing is tightened, the cutting fluid can no longer enter the first piston cylinder 22; when the pressure inside the second piston cylinder 13 is greater than the pressure relief valve threshold, the pressure relief valve opens, and the cutting fluid enters the spray pipe 20. After being atomized by the atomizing nozzle 21, it is evenly sprayed onto the bearing and grinding area on the rotating fixture to achieve cooling and lubrication.

[0043] Waste cutting fluid (including grinding debris) generated during the grinding process falls into the collection hopper 35 and is transported to the cutting fluid tank 9 through the collection pipe 10. The cutting fluid tank 9 is equipped with a filter screen opposite to the collection pipe 10. The filter screen filters the grinding debris in the waste cutting fluid to prevent the debris from entering the second pipe 27 and causing blockage or affecting the cooling effect. The filtered cutting fluid can be reused to achieve recycling and reduce production costs.

[0044] After the grinding process is completed, the solenoid valve 30 is opened, and the first moving piston 43 moves down under the action of the first spring 44; under the action of the second spring 46, the slider 38 and the wedge-shaped tension block 19 are reset, releasing the clamping of the bearing; the cutting fluid in the first piston cylinder 22 flows back to the cutting fluid tank 9 through the three-way pipe 33 and the return pipe 31 to avoid wasting cutting fluid.

[0045] This production line operates fully automatically, following the sequence of feeding, turning, grinding, assembly, and inspection. Its core component is the grinding unit 3, which, through the linkage of a rotating fixture and a cooling mechanism, achieves single-motor drive, automatic tensioning, synchronous cooling, and cutting fluid recycling. The specific working principle is as follows: The hub bearing is fitted onto the outside of the wedge-shaped tensioning block 19. At this time, the second spring 46 is in its natural state, and the wedge-shaped tensioning block 19 is in a contracted state, making it easy for the bearing to be fitted. The motor 11 is started, and the power is transmitted to the second bevel gear 14 through the first shaft 15 and the first bevel gear 16, driving the first piston cylinder 22 to rotate. The second bevel gear 14 synchronously drives the third bevel gear 23, the second shaft 24, and the circular plate 25 to rotate, which drives the second moving piston 36 to reciprocate linearly within the second piston cylinder 13 through the connecting rod 26. When the second moving piston 36 presses down, the second piston cylinder 13 is pressurized, the liquid outlet check valve 29 opens, and the liquid inlet check valve 32 closes, allowing the cutting fluid to enter the first piston cylinder 22 through the first pipe 28 and the three-way pipe 33. The cutting fluid pushes the first moving piston 43 upward against the first spring 44, causing the rectangular rod 42 and the conical column 47 to move upward. The tapered column 47 presses against the wedge-shaped tensioning block 19, pushing the slider 38 to move radially outward along the guide rod 39. The wedge-shaped tensioning block 19 then tensions the inner ring of the bearing outward, completing the positioning and clamping.

[0046] The motor 11 runs continuously, and the first piston cylinder 22 drives the support ring 18, the wedge-shaped tensioning block 19 and the bearing to rotate synchronously. The side of the bearing contacts the grinding belt 8 to complete the high-precision grinding process and correct the turning error.

[0047] The continuous operation of motor 11 causes the pressure inside the second piston cylinder 13 to rise continuously. When the pressure exceeds the threshold of the pressure relief valve on the spray pipe 20, the cutting fluid enters the spray pipe 20 and is atomized by the atomizing nozzle 21 and evenly sprayed onto the grinding area of ​​the bearing and grinding belt 8 to achieve cooling, lubrication, and dust reduction. The waste cutting fluid after grinding falls into the collection hopper 35 and flows back to the cutting fluid tank 9 through the collection pipe 10. After being filtered by the filter screen, it is recycled.

[0048] After grinding is completed, motor 11 stops, and solenoid valve 30 on the three-way pipe 33 is opened. The first spring 44 rebounds and pushes the first moving piston 43 downward, while the second spring 46 pulls the slider 38 and wedge-shaped tensioning block 19 to contract radially, releasing the tension on the bearing. The residual cutting fluid in the first piston cylinder 22 flows back to the cutting fluid tank 9 through the three-way pipe 33 and return pipe 31, completing the reset and allowing for the next loading and processing.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A production line for processing automotive wheel hub bearings, characterized in that, It includes a feeding unit (1), a turning unit (2), a grinding unit (3), an assembly unit (4), and an inspection unit (5) arranged in sequence. The grinding unit (3) includes a processing box (45) and a grinding belt (8), and a support plate (6) is installed inside it. A rotating fixture bearing a bearing is installed on the support plate (6), and the grinding belt (8) is located on one side of the rotating fixture. It also includes a cooling mechanism connected to the rotary fixture, which is located inside the machining box (45). When the rotary fixture opens from inside the bearing and tightens the bearing, the cooling mechanism sprays cutting fluid onto the rotary fixture.

2. The automotive wheel hub bearing processing production line according to claim 1, characterized in that, The rotating clamp includes a first piston cylinder (22) that passes through the support plate (6) and is rotatably disposed therewith. A first movable piston (43) is slidably connected inside the first piston cylinder (22). A first spring (44) is fixed to the bottom of the first movable piston (43). The other end of the first spring (44) is fixedly connected to the inner bottom of the first piston cylinder (22). A rectangular rod (42) is fixed to the upper end of the first movable piston (43). A guide ring (40) is fixedly connected inside the first piston cylinder (22). The rectangular rod (42) passes through the guide ring (40) and is slidably connected therewith. A conical column (47) is fixed to the upper end of the rectangular rod (42). A support ring (18) is sleeved on the outer surface of the first piston cylinder (22) and is fixedly connected therewith. A wedge-shaped tensioning block (19) that cooperates with the conical column (47) is provided on the support ring (18). The upward movement of the conical column (47) will drive the four wedge-shaped tensioning blocks (19) to move outward radially.

3. The automotive wheel hub bearing processing production line according to claim 2, characterized in that, The upper end of the support ring (18) is provided with four guide grooves (37) communicating with the inside of the support ring (18). A guide rod (39) is fixed in the guide groove (37). A slider (38) is slidably connected in the guide groove (37). The guide rod (39) passes through the slider (38) and is slidably connected to it. The wedge-shaped tensioning block (19) is fixed on the upper end of the slider (38). A second spring (46) is fixed on the slider (38). The other end of the second spring (46) is fixedly connected to the inner wall of the guide groove (37).

4. The automotive wheel hub bearing processing production line according to claim 3, characterized in that, The bottom of the support plate (6) is fixed with a first vertical plate (12), a motor (11) is installed on the first vertical plate (12), the output end of the motor (11) is fixed with a first shaft (15), a first bevel gear (16) is fixed on the first shaft (15), and a second bevel gear (14) is fixed on the first piston cylinder (22). The first bevel gear (16) meshes with the second bevel gear (14).

5. The automotive wheel hub bearing processing production line according to claim 4, characterized in that, The cooling mechanism includes a cutting fluid tank (9) and a second piston cylinder (13) installed in the machining box (45). The second piston cylinder (13) is connected to a first pipe (28) and a second pipe (27). A three-way pipe (33) is installed on the first pipe (28). The other end of the three-way pipe (33) is rotatably connected to the first piston cylinder (22). A return pipe (31) is installed on the other end of the three-way pipe (33). The return pipe (31) is connected to the cutting fluid tank (9). A solenoid valve (30) for controlling the opening and closing of the return pipe (31) is installed on the three-way pipe (33). The second pipe (27) is connected to the cutting fluid tank (9). A horizontal plate (34) is fixedly installed on the machining box (45). A spray pipe (20) is installed on the horizontal plate (34). An atomizing nozzle (21) is installed on the spray pipe (20). The spray pipe (20) is connected to the second piston cylinder (13).

6. The automotive wheel hub bearing processing production line according to claim 5, characterized in that, The bottom of the support plate (6) is fixed with a second vertical plate (17), and a second shaft (24) is rotatably mounted on the second vertical plate (17). A third bevel gear (23) is fixed on the second shaft (24), and the third bevel gear (23) meshes with the second bevel gear (14). A circular plate (25) is fixed on the second shaft (24), and a connecting rod (26) is eccentrically hinged on the circular plate (25). A second movable piston (36) is slidably connected inside the second piston cylinder (13), and the connecting rod (26) is hinged to the second movable piston (36).

7. The automotive wheel hub bearing processing production line according to claim 5, characterized in that, A liquid discharge check valve (29) is installed on the first pipe (28), which only allows the cutting fluid to flow into the first pipe (28) through the second piston cylinder (13).

8. The automotive wheel hub bearing processing production line according to claim 5, characterized in that, The second pipe (27) is equipped with a liquid inlet check valve (32), which only allows the cutting fluid in the cutting fluid tank (9) to flow into the second pipe (27).

9. The automotive wheel hub bearing processing production line according to claim 5, characterized in that, A pressure relief valve is installed on the spray pipe (20).

10. The automotive wheel hub bearing processing production line according to claim 6, characterized in that, The support plate (6) is through which a collection pipe (10) is installed. A liquid collection hopper (35) is installed at the upper end of the collection pipe (10). The cutting fluid tank (9) is provided with a filter screen opposite to the collection pipe (10). The second pipe (27) is located on the other side of the filter screen.

Images