Bearing press-fitting equipment and method adaptive to bearing assembly

Abstract

The invention relates to the technical field of bearing assembly equipment, and particularly discloses bearing press-fitting equipment and method adaptive to bearing assembly, the bearing press-fitting equipment comprises a rack, a press-fitting frame is fixedly arranged in the middle of the rear side of the top of the rack, and discharging frames are fixedly arranged at the positions, located on the left side and the right side of the press-fitting frame, of the top of the rack. The top of the press-fitting frame is matched with the press-fitting mechanism arranged over the top of the press-fitting frame to conduct automatic press-fitting on the bearing and the end cover, after press-fitting between the bearing and the end cover is completed, the upper surfaces and the lower surfaces of the bearing and the end cover are cleaned and dried at the same time, and it is avoided that oil stains remain on the surfaces of the bearing and the end cover after press-fitting is completed; according to the bearing press-fitting device, the follow-up packaging procedure efficiency of the bearing and the end cover is affected, through cooperative work of the mutually-matched structural components, the surface cleaning degree of the bearing and the end cover component is guaranteed while automatic and accurate cooperative press-fitting machining between the bearing and the end cover component is achieved, and the bearing assembling and press-fitting effect is improved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing assembly equipment, and in particular to bearing press-fitting equipment and a method suitable for bearing assembly. Background Art

[0002] Bearings are an important component in contemporary mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. Therefore, bearings need to be assembled with the objects they are used for. This assembly method is called bearing press fitting. Bearing press fitting requires the use of a bearing press machine. The bearing is fixed on a press fitting table, and then the workpiece to be assembled with the bearing is aligned with the bearing. The workpiece is pushed by a cylinder so that it is sleeved on the outer ring of the bearing or clamped in the inner ring of the bearing to complete the press fitting operation. Bearings have a wide range of applications, so there are many types of workpieces that can be press fitted with bearings.

[0003] The flange end cover is the most common workpiece for bearing press-fitting. The bearing is sleeved on the positioning column, and the flange end cover is placed on the upper end of the bearing, and the flange end cover is pushed by the cylinder to be sleeved on the outer ring of the bearing. The traditional method only uses the cylinder to push. In order to ensure the firmness of the press-fitting, the diameter of the outer ring of the bearing is almost the same as the outer diameter of the flange end cover. Therefore, the friction between the bearing and the flange end cover is very large during press-fitting, resulting in a large cylinder power required for press-fitting, which is bound to cause a certain amount of energy loss. At the same time, excessive friction will also cause friction loss between the bearing and the flange end cover during press-fitting, reducing the press-fitting quality. In addition, the existing bearing assembly press-fitting equipment cannot clean the surface of the finished bearing press-fitted product after completing the bearing press-fitting process, resulting in a decrease in the efficiency of the subsequent bearing press-fitted parts packaging process. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a bearing press-fitting device and method suitable for bearing assembly, in order to solve the above-mentioned technical defects.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bearing press-fitting device adapted for bearing assembly, comprising a frame, a press-fitting frame is fixedly arranged in the middle of the rear side of the top of the frame, a material placing frame is fixedly arranged on the top of the frame and on the left and right sides of the press-fitting frame, a material loading assembly is arranged on the front side of the top of the frame, and an oiling assembly is arranged on the rear sides of the two material placing frames, and a press-fitting mechanism is also arranged on the top of the frame and directly above the press-fitting frame;

[0006] Fixed columns are fixedly arranged on both sides of the top of the frame, and support columns are fixedly arranged on the tops of the two fixed columns, a connecting plate is fixedly arranged in the middle of the surfaces of the two support columns, and a mounting plate is fixedly arranged on the tops of the two support columns, and a gas-liquid booster cylinder is fixedly arranged on the top of the mounting plate;

[0007] The oiling assembly comprises a fixed seat and an adjusting frame, the rear sides of the two discharge frames are fixedly provided with a fixed seat, and the tops of the two fixed seats are slidably provided with an adjusting frame through an electric push rod, the bottom surfaces of the two adjusting frames located at the front sides are respectively fixedly provided with an oiling frame 1 and an oiling frame 2, and a rotating frame 1 is rotatably provided inside the oiling frame 1, and a rotating frame 2 is rotatably provided at the bottom of the oiling frame 2, the tops of the rotating frame 1 and the rotating frame 2 are respectively provided with oil guide rings matching therewith, and the bottoms of the two oil guide rings are respectively rotatably connected with the insides of the rotating frame 1 and the rotating frame 2, a plurality of micro electric cylinders are fixedly provided inside the rotating frame 1 and the rotating frame 2, and oiling brushes are fixedly provided at the driving ends of the plurality of micro electric cylinders, an oil guiding channel is provided inside the rotating frame 1 and the rotating frame 2, and the interiors of the two oil guiding channels are respectively communicated with the interiors of the two oil guiding rings, and the interiors of the plurality of oiling brushes are communicated with the interiors of the oil guiding channels through spring tubes;

[0008] The press-fitting mechanism includes a press-fitting head, a positioning sleeve and a telescopic rod. The bottom end of the driving end of the gas-liquid booster cylinder extends to the bottom of the connecting plate, and the press-fitting head is fixedly arranged at the bottom end of the driving end of the gas-liquid booster cylinder. The top of the press-fitting frame is fixedly arranged with a positioning sleeve, and the telescopic rod is slidably arranged inside the positioning sleeve. The bottom of the press-fitting head is provided with a protrusion that cooperates with the telescopic rod, wherein the diameter of the positioning sleeve is the same as the inner hole diameter of the bearing.

[0009] Furthermore, the loading assembly includes a servo linear slide, a servo linear slide is fixedly arranged on the front side of the top of the frame, and sliding blocks are slidably arranged on the left and right sides of the top of the servo linear slide, a servo electric cylinder 1 is fixedly arranged on the top of the two sliding blocks, and a servo electric cylinder 2 is fixedly arranged on the top of the driving end of the two servo electric cylinders 1, and a finger slide cylinder is fixedly arranged on the driving end of the two servo electric cylinders 2.

[0010] Furthermore, the structures of the two oil guide rings are matched with the structures of the rotating frame 1 and the rotating frame 2 respectively, and the two oil guide rings are respectively fixedly arranged inside the upper oil frame 1 and the upper oil frame 2.

[0011] Furthermore, a material discharging trough is provided on the top of the two material discharging racks, and three positioning movable rods are slidably provided inside the two material discharging troughs through an electric slide.

[0012] Furthermore, a fixing sleeve is fixedly arranged inside the press frame, and the bottom end of the telescopic rod is slidably connected to the inside of the fixing sleeve. A spring is also fixedly arranged at the bottom of the inner wall of the fixing sleeve, and the top of the spring is fixedly connected to the bottom end of the telescopic rod.

[0013] Furthermore, a cleaning frame is rotatably provided at the bottom of the press-fitting head and the top of the press-fitting frame, and a plurality of cleaning brushes are provided on opposite sides of the two cleaning frames, material guide channels are provided inside the upper and lower cleaning frames, and the interiors of the plurality of cleaning brushes are connected with the interiors of the material guide channels, and material guide rings are fixedly provided inside the press-fitting head and the press-fitting frame, and the interiors of the two material guide rings are respectively connected with the material guide channels inside the two cleaning frames.

[0014] Furthermore, the press-fitting head and the press-fitting frame are both provided with driving gears which are rotated by built-in motors, and the surfaces of the two driving gears are respectively meshed with the outer circumferential surfaces of the two cleaning frames for transmission.

[0015] Furthermore, two servo electric cylinders three are fixedly arranged at the lower part of the press frame, and a closed ring frame is movably arranged at the upper part of the press frame. The top ends of the driving ends of the two servo electric cylinders three are fixedly connected to the bottom of the closed ring frame, and a plurality of discharge holes are arranged at the top of the press frame.

[0016] Furthermore, a bearing press-fitting method adapted for bearing assembly comprises the following steps:

[0017] Step 1: After placing the bearing and the end cover into the two discharge troughs on the left and right sides respectively, the inside of the bearing and the outer peripheral surface of the end cover are positioned respectively by the positioning movable rods movably arranged inside the two discharge troughs;

[0018] Step 2: After placing the bearing on the unloading rack on the left, control the adjustment rack on the left to descend until the bottom of the oiling rack 1 contacts the top of the unloading rack. At this time, the bearing is entirely inside the rotating rack 1, and the oiling brushes are driven to approach the outer surface of the bearing by using the several micro-electric cylinders inside the rotating rack 1, until one side of the several oiling brushes contacts the outer surface of the bearing, and then lubricating oil is sent into the several oiling brushes through the oil guide ring on the top of the rotating rack 1. Finally, the rotating rack 1 is controlled to rotate inside the oiling rack 1, and the outer peripheral surface of the bearing is oiled under the action of the several oiling brushes;

[0019] Step 3: Use the oiling rack 2 and rotating rack 2 on the right side to apply oil to the inner surface of the end cover. The same operation steps as applying oil to the outer surface of the bearing are adopted. The difference is that when applying oil to the inner surface of the end cover, the rotating rack 2 is located inside the end cover as a whole. Several oiling brushes arranged on the rotating rack 2 are in contact with the inner surface of the end cover. The rotating rack 2 is controlled to rotate, thereby realizing automatic oiling of the inner surface of the end cover.

[0020] Step 4: When loading the bearing and the end cover, the servo electric cylinder 1 on the left is used to control the servo electric cylinder 2 to lift upward, and the servo electric cylinder 2 is used to control the finger slide cylinder to extend to the top of the unloading rack on the left. Then the servo electric cylinder 1 is controlled to retract its driving end, so that the two clamping fingers of the finger slide cylinder are located on both sides of the bearing surface, and the two clamping fingers on the finger slide cylinder are used to clamp and position the upper part of the bearing surface. Then the servo electric cylinder 1 is controlled to extend its driving end, and the servo electric cylinder 2 is controlled to retract its driving end. The servo linear slide drives the sliding block on the left to slide toward one side of the press-fitting frame, so that the bearing inside the finger slide cylinder is directly in front of the press-fitting frame. At this time, the driving end of the servo electric cylinder 2 is controlled to extend, and the bearing is sent to the middle position of the top of the press-fitting frame to complete the automatic loading operation of the bearing. Then, the same operation is adopted, and the servo electric cylinder 1 and servo electric cylinder 2 on the right cooperate with the finger slide cylinder to send the end cover above the right unloading frame to the middle position above the press-fitting frame to complete the automatic positioning and loading of the two components of the bearing and the end cover.

[0021] Step 5: Control the driving end of the gas-liquid booster cylinder to drive the press head to move downward, and use the press head to automatically press the end cover and the bearing. When the bearing and the end cover are pressed, the bottom end of the press head contacts the top end of the telescopic rod, and when the press head continues to press downward, the convex block at the bottom of the press head pushes the bottom end of the telescopic rod to slide downward inside the fixed sleeve until the bottom of the press head contacts the top of the bearing and the end cover, completing the press fitting process between the bearing and the end cover.

[0022] Step six, after completing the press-fitting process between the bearing and the end cover, the servo electric cylinder three arranged inside the press-fitting frame is used to push the closed annular frame upward until the top of the closed annular frame contacts the bottom of the connecting plate, and a closed chamber is formed by using the discharge frame, the press-fitting frame and the connecting plate. At this time, the press-fitting head and the cleaning frame inside the press-fitting frame are respectively controlled to rotate, and at the same time, solvent-based cleaning liquid is introduced into several cleaning brushes inside the two cleaning frames through two guide rings, and the cleaning frame rotatably arranged on the upper and lower surfaces of the bearing and the end cover cooperates with several cleaning brushes to clean the oil stains remaining on the upper and lower surfaces of the bearing and the end cover, and the cleaning waste liquid is discharged through several discharge holes arranged on the top of the press-fitting frame, and then dry hot air is introduced into the inside of the cleaning brush through the guide ring, and the cleaned outer surface of the bearing and the end cover is dried by the dry hot air.

[0023] The beneficial effects achieved by the present invention using the above structure are as follows:

[0024] 1. In the present invention, a press-fitting frame and a discharge frame are arranged on the top of the frame, and a feeding assembly is arranged on the front side of the top of the frame. When the press-fitting process between the bearing and the end cover is carried out, the bearing and the end cover components are placed on the top of the two discharge frames respectively, and then, under the control of the feeding assembly, the bearings and the end cover components on the top of the two discharge frames are successively sent to the top of the press-fitting frame for placement. The top of the press-fitting frame cooperates with the pressing mechanism arranged just above to automatically press-fit the bearing and the end cover components, and after the press-fitting between the bearing and the end cover is completed, the upper and lower surfaces of the bearing and the end cover are cleaned and dried at the same time to avoid residual oil stains on the surfaces of the bearing and the end cover after the press-fitting is completed, which affects the efficiency of the subsequent packaging process of the bearing and the end cover. In the present invention, through the cooperation of the above-mentioned mutually matching structural components, while realizing the automated and precise matching press-fitting process between the bearing and the end cover components, the surface cleanliness of the bearing and the end cover components is also guaranteed, which improves the assembly and pressing effect of the bearing to a certain extent, and also plays a role in simplifying the equipment structure and reducing the equipment operating cost and the difficulty of human operation.

[0025] 2. In the present invention, when the inner surface of the end cover is oiled, the rotating frame 2 is entirely located inside the end cover, and a plurality of oiling brushes arranged on the rotating frame 2 are in contact with the inner surface of the end cover, and the rotating frame 2 is controlled to rotate, thereby realizing automatic oiling of the inner surface of the end cover. By oiling the outer surface of the bearing and the inner surface of the end cover respectively before the bearing and the end cover are press-fitted, the friction loss between the bearing and the end cover during the press-fitting process can be reduced to a great extent, thereby playing a role in extending the service life of the bearing.

[0026] 3. After the bearing and the end cover are respectively placed in the two discharge troughs on the left and right sides, the present invention uses the positioning movable rods movably arranged inside the two discharge troughs to position the inside of the bearing and the outer peripheral surface of the end cover, so that the bearing and the end cover are positioned in the middle position inside the two discharge troughs, and then cooperates with a plurality of oiling brushes arranged on the two adjustment frames to oil the inner surface of the bearing and the outer peripheral surface of the end cover respectively.

[0027] 4. In the present invention, after the press-fitting process between the bearing and the end cover is completed, a solvent-type cleaning liquid is introduced into a plurality of cleaning brushes inside two cleaning racks through two guide rings, and the cleaning racks rotatably arranged on the upper and lower surfaces of the bearing and the end cover cooperate with a plurality of cleaning brushes to clean the oil stains remaining on the upper and lower surfaces of the bearing and the end cover, and the cleaning waste liquid is discharged through a plurality of discharge holes arranged on the top of the press-fitting rack, and then dry hot air is introduced into the inside of the cleaning brush through the guide ring, and the outer surface of the cleaned bearing and end cover is dried by the dry hot air, which largely ensures the surface cleanliness of the bearing and the end cover after the press-fitting process, thereby facilitating the subsequent packaging of the bearing and end cover press-fit parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 A schematic diagram of a bearing press-fitting device and method structure suitable for bearing assembly according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of a feeding assembly according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the discharge trough and positioning movable rod structure of an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of a structure of an adjusting rack and an oiling rack according to an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of the two structures of the adjusting rack and the oiling rack according to an embodiment of the present invention;

[0034] Figure 6 It is a schematic diagram of the internal structure of the oiling rack 1 and the rotating rack 1 according to an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a press-fitting mechanism structure according to an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of a connecting plate and a press-fitting head structure according to an embodiment of the present invention;

[0037] Fig. 9 It is a schematic diagram of the cleaning frame and the material guide ring structure according to an embodiment of the present invention.

[0038] In the figure, 1, frame; 2, press-fitting frame; 3, discharge frame; 4, fixed column; 5, support column; 6, connecting plate; 7, mounting plate; 8, gas-liquid booster cylinder; 9, servo linear slide; 10, sliding block; 11, servo electric cylinder one; 12, servo electric cylinder two; 13, finger slide cylinder; 14, discharge trough; 15, positioning movable rod; 16, fixed seat; 17, adjustment frame; 18, oiling frame one; 19, oiling frame two; 20, rotating frame one; 21, rotating frame two; 22, micro electric cylinder; 23, oiling brush; 24, oil guide ring; 25, positioning sleeve; 26, telescopic rod; 27, fixed sleeve; 28, spring; 29, press-fitting head; 30, cleaning frame; 31, cleaning brush; 32, driving gear; 33, guide ring; 34, closed ring frame; 35, servo electric cylinder three. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] Embodiment 1:

[0042] See also Figures 1 to 9 As shown, a bearing press-fitting device suitable for bearing assembly includes a frame 1, a press-fitting frame 2 is fixedly arranged in the middle of the top rear side of the frame 1, a discharge frame 3 is fixedly arranged on the top of the frame 1 and on the left and right sides of the press-fitting frame 2, a loading assembly is arranged on the front side of the top of the frame 1, and the rear sides of the two discharge frames 3 are arranged with oiling assemblies, and a press-fitting mechanism is also arranged on the top of the frame 1 and directly above the press-fitting frame 2.

[0043] In a specific embodiment, the present invention sets a press-fitting frame 2 and a discharge frame 3 on the top of the frame 1, and cooperates with the feeding assembly set on the front side of the top of the frame 1. When performing the press-fitting process between the bearing and the end cover, the bearing and the end cover components are placed on the top of the two discharge frames 3 respectively, and then under the control of the feeding assembly, the bearings and the end cover components on the top of the two discharge frames 3 are successively sent to the top of the press-fitting frame 2 for placement. The top of the press-fitting frame 2 cooperates with the pressing mechanism set just above to automatically press-fit the bearing and the end cover components. After the press-fitting between the bearing and the end cover is completed, the upper and lower surfaces of the bearing and the end cover are cleaned and dried at the same time to avoid residual oil stains on the surfaces of the bearing and the end cover after the press-fitting is completed, which affects the efficiency of the subsequent packaging process of the bearing and the end cover. In the present invention, through the cooperation of the above-mentioned mutually matching structural components, while realizing the automated and precise matching press-fitting process between the bearing and the end cover components, the surface cleanliness of the bearing and the end cover components is also guaranteed, which improves the assembly and pressing effect of the bearing to a certain extent, and also simplifies the equipment structure and reduces the equipment operating cost and the difficulty of manual operation.

[0044] Furthermore, fixed columns 4 are fixedly provided on both sides of the top of the frame 1, and support columns 5 are fixedly provided on the tops of the two fixed columns 4, a connecting plate 6 is fixedly provided in the middle of the surfaces of the two support columns 5, and a mounting plate 7 is fixedly provided on the tops of the two support columns 5, and a gas-liquid booster cylinder 8 is fixedly provided on the top of the mounting plate 7;

[0045] Furthermore, the loading component includes a servo linear slide 9, a servo linear slide 9 is fixedly arranged on the front side of the top of the frame 1, and sliding blocks 10 are slidably arranged on the left and right sides of the top of the servo linear slide 9, a servo electric cylinder 11 is fixedly arranged on the top of the two sliding blocks 10, and a servo electric cylinder 2 12 is fixedly arranged on the top of the driving end of the two servo electric cylinders 11, and a finger slide cylinder 13 is fixedly arranged on the driving end of the two servo electric cylinders 12, and the clamping fingers of the two finger slide cylinders 13 are made of brass.

[0046] It should be noted that when performing the loading operation of the bearing and the end cover, the servo electric cylinder 11 on the left side is used to control the servo electric cylinder 12 to lift upward, and the driving end of the servo electric cylinder 12 is used to control the finger slide cylinder 13 to extend to the top of the unloading rack 3 on the left side, and then the driving end of the servo electric cylinder 11 is controlled to retract, so that the two clamping fingers of the finger slide cylinder 13 are respectively on both sides of the bearing surface, and the two clamping fingers on the finger slide cylinder 13 are used to clamp and position the upper part of the bearing surface, and then the driving end of the servo electric cylinder 11 is controlled to extend, and the driving end of the servo electric cylinder 12 is retracted, and the servo linear slide 9 is coordinated with the servo electric cylinder 11. The sliding block 10 on the left side is moved to slide toward the side of the press-fitting frame 2, so that the bearing inside the finger slide cylinder 13 is directly in front of the press-fitting frame 2. At this time, the driving end of the servo electric cylinder 2 12 is controlled to extend to send the bearing to the middle position of the top of the press-fitting frame 2, completing the automatic loading operation of the bearing, and then using the same operation, using the servo electric cylinder 1 11 and servo electric cylinder 2 12 on the right to cooperate with the finger slide cylinder 13 to send the end cover above the right-side discharge rack 3 to the middle position above the press-fitting frame 2, completing the automatic positioning and loading of the two components of the bearing and the end cover, solving the problems of low efficiency and poor alignment accuracy in the manual loading process.

[0047] Embodiment 2:

[0048] Furthermore, the oiling assembly includes a fixed seat 16 and an adjusting frame 17. The rear sides of the two material discharging frames 3 are fixedly provided with fixed seats 16, and the tops of the two fixed seats 16 are slidably provided with adjusting frames 17 through electric push rods. The bottom surfaces of the two adjusting frames 17 located at the front sides are respectively fixedly provided with an oiling frame 18 and an oiling frame 2 19, and the interior of the oiling frame 18 is rotatably provided with a rotating frame 1 20, and the bottom of the oiling frame 2 19 is rotatably provided with a rotating frame 21. The tops of the rotating frames 10 and 21 are both provided with oil guide rings 24 matched therewith, and the bottoms of the two oil guide rings 24 are respectively connected with the rotating frames 10 and 21. Internal rotation connection, wherein the structures of the two oil guide rings 24 are respectively matched with the structures of the rotating frame 1 20 and the rotating frame 21, and the two oil guide rings 24 are respectively fixedly arranged inside the oiling frame 1 18 and the oiling frame 2 19; the interiors of the rotating frame 1 20 and the rotating frame 21 are both fixedly provided with a plurality of micro electric cylinders 22, and the driving ends of the plurality of micro electric cylinders 22 are all fixedly provided with oiling brushes 23, the interiors of the rotating frame 1 20 and the rotating frame 21 are both provided with oil guide channels, and the interiors of the two oil guide channels are respectively communicated with the interiors of the two oil guide rings 24, and the interiors of the plurality of oiling brushes 23 are all communicated with the interiors of the oil guide channels through spring tubes.

[0049] It should be noted that the backs of the two adjustment frames 17 are provided with oil guide interfaces, through which lubricating oil is respectively fed into the insides of the two oil guide rings 24, and a plurality of oiling brushes 23 on the rotating frame 1 20 are arranged in a circular and equiangular distribution on the inner side of the rotating frame 1 20, and a plurality of oiling brushes 23 on the rotating frame 21 are arranged in a circular and equiangular distribution on the outer side of the rotating frame 21, and in addition, the rotating frame 1 20 and the rotating frame 2 21 are respectively located inside the oiling frame 1 18 and the oiling frame 2 19, and are driven to rotate by means of micro motors and gears, specifically, the micro motor is used to drive the gears to rotate, so that the gears and the rotating frame 1 20 and the rotating frame 2 21 are meshed and driven, thereby realizing the rotation control of the rotating frame 1 20 and the rotating frame 2 21;

[0050] The outer surface of the bearing is oiled by using the oiling rack 18 and the rotating rack 20 on the left. The specific operation is as follows: after placing the bearing on the discharge rack 3 on the left, the adjusting rack 17 on the left is controlled to descend until the bottom of the oiling rack 18 contacts the top of the discharge rack 3. At this time, the bearing is in the interior of the rotating rack 20 as a whole. The oiling brushes 23 are driven to approach the outer surface of the bearing by using the several micro-electric cylinders 22 inside the rotating rack 20 until one side of the several oiling brushes 23 contacts the outer surface of the bearing, and then lubricating oil is sent into the interior of the several oiling brushes 23 through the oil guide ring 24 on the top of the rotating rack 20. Finally, the rotating rack 20 is controlled to rotate inside the oiling rack 18, and the outer peripheral surface of the bearing is oiled under the action of the several oiling brushes 23.

[0051] The inner surface of the end cover is oiled by using the oiling rack 19 and the rotating rack 21 on the right side, and the same operation steps as the oiling of the outer surface of the bearing are adopted. The difference is that when the inner surface of the end cover is oiled, the rotating rack 21 is entirely inside the end cover, and the plurality of oiling brushes 23 arranged on the rotating rack 21 are in contact with the inner surface of the end cover, and the rotating rack 21 is controlled to rotate, thereby realizing the automatic oiling of the inner surface of the end cover;

[0052] By applying oil to the outer surface of the bearing and the inner surface of the end cover before press-fitting the bearing and the end cover, the friction loss between the bearing and the end cover during the press-fitting process can be reduced to a great extent, thereby extending the service life of the bearing.

[0053] Furthermore, in order to ensure the accuracy of the position of the bearings and the end covers during the oiling process, a discharge trough 14 is provided on the top of the two discharge racks 3, and three positioning movable rods 15 are slidably provided inside the two discharge troughs 14 through an electric slide; among them, the three positioning movable rods 15 located inside the left discharge trough 14 are slidably provided close to the middle of the discharge trough 14, and the three positioning movable rods 15 located inside the right discharge trough 14 are slidably provided close to the inner wall of the discharge trough 14, and the three positioning movable rods 15 are distributed at equal angles with respect to the central axis of the discharge trough 14.

[0054] It should be noted that after the bearing and the end cover are respectively placed in the two discharge troughs 14 on the left and right sides, the interior of the bearing and the outer peripheral surface of the end cover are positioned respectively through the positioning movable rods 15 movably arranged inside the two discharge troughs 14, so that the bearing and the end cover are positioned in the middle position inside the two discharge troughs 14, and then the inner surface of the bearing and the outer peripheral surface of the end cover are oiled respectively with a plurality of oiling brushes 23 arranged on the two adjustment frames 17.

[0055] Embodiment 3:

[0056] Further, the press-fitting mechanism includes a press-fitting head 29, a positioning sleeve 25 and a telescopic rod 26, the bottom end of the driving end of the gas-liquid booster cylinder 8 extends to the bottom of the connecting plate 6, and the bottom end of the driving end of the gas-liquid booster cylinder 8 is fixedly provided with a press-fitting head 29, the top of the press-fitting frame 2 is fixedly provided with a positioning sleeve 25, and the inside of the positioning sleeve 25 is slidably provided with a telescopic rod 26, and the bottom of the press-fitting head 29 is provided with a convex block matched with the telescopic rod 26, wherein the diameter of the positioning sleeve 25 is the same as the inner hole diameter of the bearing;

[0057] It should be noted that when loading the bearings and end covers, the bearings and end covers are successively sent to the top of the press-fitting frame 2 through the two finger slide cylinders 13 on the left and right sides, so that the inner sleeve of the bearing is set on the surface of the positioning sleeve 25, and then the end cover is placed on the top of the bearing, so that the inner circumference of the end cover and the outer circumference of the bearing are matched and connected. At this time, the driving end of the gas-liquid booster cylinder 8 is controlled to drive the press-fitting head 29 to move downward, and the press-fitting head 29 is used to automatically press the end cover and the bearing.

[0058] Furthermore, in order to improve the coaxiality between the end cover and the bearing during press-fitting and avoid interference between the press-fitting head 29 and the telescopic rod 26, a fixing sleeve 27 is fixedly arranged inside the press-fitting frame 2, and the bottom end of the telescopic rod 26 is slidably connected to the inside of the fixing sleeve 27, and a spring 28 is also fixedly arranged at the bottom of the inner wall of the fixing sleeve 27, and the top of the spring 28 is fixedly connected to the bottom end of the telescopic rod 26; when the bearing and the end cover are press-fitted, the bottom end of the press-fitting head 29 contacts the top end of the telescopic rod 26, and as the press-fitting head 29 continues to press downward, the convex block at the bottom of the press-fitting head 29 pushes the bottom end of the telescopic rod 26 to slide downward inside the fixing sleeve 27 until the bottom of the press-fitting head 29 contacts the top of the bearing and the end cover, thereby completing the press-fitting process between the bearing and the end cover.

[0059] Embodiment 4:

[0060] Furthermore, in order to solve the problem of residual oil stains on the upper and lower surfaces of the bearings and end covers after the press-fitting process, which affects the subsequent packaging efficiency of the bearing end cover press-fitted parts, a cleaning frame 30 is rotatably provided at the bottom of the press-fitting head 29 and the top of the press-fitting frame 2, and a plurality of cleaning brushes 31 are provided on the opposite sides of the two cleaning frames 30, and a material guide channel is provided inside the upper and lower cleaning frames 30, and the interiors of the plurality of cleaning brushes 31 are connected with the interior of the material guide channel, and a material guide ring 33 is fixedly provided inside the press-fitting head 29 and the press-fitting frame 2, and the interiors of the two material guide rings 33 are respectively connected with the material guide channels inside the two cleaning frames 30, and the interiors of the press-fitting head 29 and the press-fitting frame 2 are rotatably provided with a driving gear 32, and the surfaces of the two driving gears 32 are respectively meshed with the outer peripheral surfaces of the two cleaning frames 30 for transmission; in addition, a material guide interface is provided on one side of the press-fitting frame 2 and the press-fitting head 29, and the interiors of the two material guide interfaces are respectively connected with the interiors of the two guide rings 33.

[0061] Furthermore, two servo electric cylinders 35 are fixedly installed at the lower part of the press-mounted frame 2, and a closed annular frame 34 is movably installed at the upper part of the press-mounted frame 2. The top ends of the driving ends of the two servo electric cylinders 35 are fixedly connected to the bottom of the closed annular frame 34, and a plurality of discharge holes are arranged at the top of the press-mounted frame 2.

[0062] It should be noted that after the press-fitting process between the bearing and the end cover is completed, the closed annular frame 34 is pushed upward by the servo electric cylinder 35 provided inside the press-fitting frame 2 until the top of the closed annular frame 34 contacts the bottom of the connecting plate 6, and a closed chamber is formed by the unloading frame 3, the press-fitting frame 2 and the connecting plate 6. At this time, the press-fitting head 29 and the cleaning frame 30 inside the press-fitting frame 2 are respectively controlled to rotate, and at the same time, a solvent-based cleaning liquid is introduced into a plurality of cleaning brushes 31 inside the two cleaning frames 30 through two guide rings 33. The cleaning frame 30 rotatably arranged on the upper and lower surfaces of the end cover cooperates with a plurality of cleaning brushes 31 to clean the oil stains remaining on the upper and lower surfaces of the bearing and the end cover. The cleaning waste liquid is discharged through a plurality of discharge holes arranged on the top of the press-fitting frame 2, and then dry hot air is introduced into the interior of the cleaning brush 31 through the guide ring 33. The dry hot air is used to dry the outer surfaces of the cleaned bearing and end cover, which largely ensures the surface cleanliness of the bearing and end cover after the press-fitting process, thereby facilitating the subsequent packaging of the bearing and end cover press-fitted parts.

[0063] Embodiment 5:

[0064] Specifically, this embodiment also discloses a bearing press-fitting method adapted for bearing assembly, which is applied to the above-mentioned bearing press-fitting device adapted for bearing assembly, and includes the following steps:

[0065] Step 1: After the bearing and the end cover are placed in the two discharge troughs 14 on the left and right sides respectively, the inside of the bearing and the outer peripheral surface of the end cover are positioned respectively by the positioning movable rods 15 movably arranged in the two discharge troughs 14;

[0066] Step 2, after placing the bearing on the unloading rack 3 on the left, control the left adjusting rack 17 to descend until the bottom of the oiling rack 18 contacts the top of the unloading rack 3, at this time, the bearing is in the interior of the rotating rack 20 as a whole, and the oiling brushes 23 are driven to approach the outer surface of the bearing by the several micro-electric cylinders 22 inside the rotating rack 20, until one side of the several oiling brushes 23 contacts the outer surface of the bearing, and then lubricating oil is sent into the interior of the several oiling brushes 23 through the oil guide ring 24 on the top of the rotating rack 20, and finally the rotating rack 20 is controlled to rotate inside the oiling rack 18, and the outer peripheral surface of the bearing is oiled under the action of the several oiling brushes 23;

[0067] Step 3: Use the oiling rack 19 and the rotating rack 21 on the right side to apply oil to the inner surface of the end cover. The same operation steps as the oiling of the outer surface of the bearing are adopted. The difference is that when applying oil to the inner surface of the end cover, the rotating rack 21 is entirely inside the end cover, and the plurality of oiling brushes 23 provided on the rotating rack 21 are in contact with the inner surface of the end cover. The rotating rack 21 is controlled to rotate, thereby realizing automatic oiling of the inner surface of the end cover.

[0068] Step 4. When loading the bearing and the end cover, the servo electric cylinder 11 on the left side is used to control the servo electric cylinder 12 to lift upward, and the servo electric cylinder 12 is used to control the finger slide cylinder 13 to extend to the top of the unloading rack 3 on the left side. Then, the servo electric cylinder 11 is controlled to retract its driving end, so that the two clamping fingers of the finger slide cylinder 13 are respectively on both sides of the bearing surface, and the two clamping fingers on the finger slide cylinder 13 are used to clamp and position the upper part of the bearing surface, and then the servo electric cylinder 11 is controlled to extend its driving end, and the servo electric cylinder 12 is retracted at the same time. The servo linear slide 9 drives the sliding block 10 on the left to slide toward one side of the press-fitting frame 2, so that the bearing inside the finger slide cylinder 13 is directly in front of the press-fitting frame 2. At this time, the driving end of the servo electric cylinder 12 is controlled to extend to send the bearing to the middle position of the top of the press-fitting frame 2, completing the automatic loading operation of the bearing. Then, the same operation is adopted, using the servo electric cylinder 1 11 and the servo electric cylinder 2 12 on the right to cooperate with the finger slide cylinder 13 to send the end cover above the right unloading frame 3 to the middle position above the press-fitting frame 2, completing the automatic positioning and loading of the two components of the bearing and the end cover.

[0069] Step 5: Control the driving end of the gas-liquid booster cylinder 8 to drive the press-fitting head 29 to move downward, and use the press-fitting head 29 to automatically press-fit the end cover and the bearing. When the bearing and the end cover are pressed, the bottom end of the press-fitting head 29 contacts the top end of the telescopic rod 26, and when the press-fitting head 29 continues to press downward, the convex block at the bottom of the press-fitting head 29 pushes the bottom end of the telescopic rod 26 to slide downward inside the fixed sleeve 27 until the bottom of the press-fitting head 29 contacts the top of the bearing and the end cover, completing the press-fitting process between the bearing and the end cover;

[0070] Step 6. After completing the press-fitting process between the bearing and the end cover, the servo electric cylinder 3 35 arranged inside the press-fitting frame 2 pushes the closed annular frame 34 to move upward until the top of the closed annular frame 34 contacts the bottom of the connecting plate 6, and a closed chamber is formed by using the discharge frame 3, the press-fitting frame 2 and the connecting plate 6. At this time, the press-fitting head 29 and the cleaning frame 30 inside the press-fitting frame 2 are respectively controlled to rotate, and at the same time, solvent-type cleaning liquid is introduced into several cleaning brushes 31 inside the two cleaning frames 30 through two guide rings 33. The cleaning frame 30 rotatably arranged on the upper and lower surfaces of the bearing and the end cover cooperates with several cleaning brushes 31 to clean the oil stains remaining on the upper and lower surfaces of the bearing and the end cover, and the cleaning waste liquid is discharged through several discharge holes arranged on the top of the press-fitting frame 2, and then dry hot air is introduced into the inside of the cleaning brush 31 through the guide ring 33, and the cleaned outer surfaces of the bearing and the end cover are dried by the dry hot air.

[0071] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bearing press-fitting device adapted for bearing assembly, comprising a frame (1), a press-fitting frame (2) being fixedly arranged in the middle of the top rear side of the frame (1), and a material placing frame (3) being fixedly arranged on the top of the frame (1) and on the left and right sides of the press-fitting frame (2), characterized in that: A loading assembly is arranged at the front side of the top of the frame (1), and an oiling assembly is arranged at the rear sides of the two unloading frames (3). A pressing mechanism is also arranged at the top of the frame (1) and directly above the pressing frame (2); Fixed columns (4) are fixedly arranged on both sides of the top of the frame (1), and support columns (5) are fixedly arranged on the tops of the two fixed columns (4), a connecting plate (6) is fixedly arranged in the middle of the surfaces of the two support columns (5), and a mounting plate (7) is fixedly arranged on the tops of the two support columns (5), and a gas-liquid booster cylinder (8) is fixedly arranged on the top of the mounting plate (7); The oiling assembly comprises a fixed seat (16) and an adjusting frame (17), the rear sides of the two material discharging frames (3) are fixedly provided with a fixed seat (16), and the tops of the two fixed seats (16) are slidably provided with an adjusting frame (17) through an electric push rod, and the bottom surfaces of the two adjusting frames (17) located at the front sides are respectively fixedly provided with an oiling frame 1 (18) and an oiling frame 2 (19), and the interior of the oiling frame 1 (18) is rotatably provided with a rotating frame 1 (20), and the bottom of the oiling frame 2 (19) is rotatably provided with a rotating frame 2 (21), and the tops of the rotating frame 1 (20) and the rotating frame 2 (21) are both provided with a matching Oil guide rings (24), and the bottoms of the two oil guide rings (24) are rotatably connected to the inside of the rotating frame 1 (20) and the rotating frame 2 (21), the inside of the rotating frame 1 (20) and the rotating frame 2 (21) are fixedly provided with a plurality of micro electric cylinders (22), and the driving ends of the plurality of micro electric cylinders (22) are fixedly provided with oiling brushes (23), the inside of the rotating frame 1 (20) and the rotating frame 2 (21) are provided with oil guide channels, and the insides of the two oil guide channels are respectively connected to the insides of the two oil guide rings (24), and the insides of the plurality of oiling brushes (23) are connected to the insides of the oil guide channels through spring tubes; The press-fitting mechanism comprises a press-fitting head (29), a positioning sleeve (25) and a telescopic rod (26); the bottom end of the driving end of the gas-liquid booster cylinder (8) extends to the bottom of the connecting plate (6), and the press-fitting head (29) is fixedly arranged at the bottom end of the driving end of the gas-liquid booster cylinder (8); the top of the press-fitting frame (2) is fixedly arranged with a positioning sleeve (25), and the interior of the positioning sleeve (25) is slidably arranged with a telescopic rod (26); the bottom of the press-fitting head (29) is provided with a convex block matching with the telescopic rod (26), wherein the diameter of the positioning sleeve (25) is the same as the inner hole diameter of the bearing.

2. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: The loading assembly comprises a servo linear slide (9), a servo linear slide (9) is fixedly arranged on the front side of the top of the frame (1), and sliding blocks (10) are slidably arranged on the left and right sides of the top of the servo linear slide (9), a servo electric cylinder 1 (11) is fixedly arranged on the top of the two sliding blocks (10), and a servo electric cylinder 2 (12) is fixedly arranged on the top of the driving end of the two servo electric cylinders 1 (11), and a finger slide cylinder (13) is fixedly arranged on the driving end of the two servo electric cylinders 2 (12).

3. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: The structures of the two oil guide rings (24) are respectively matched with the structures of the rotating frame 1 (20) and the rotating frame 2 (21), and the two oil guide rings (24) are respectively fixedly arranged inside the upper oil frame 1 (18) and the upper oil frame 2 (19).

4. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: The tops of the two material discharging racks (3) are both provided with material discharging troughs (14), and three positioning movable rods (15) are both slidably provided inside the two material discharging troughs (14) via electric slides.

5. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: A fixing sleeve (27) is fixedly arranged inside the press-fitting frame (2), and the bottom end of the telescopic rod (26) is slidably connected to the inside of the fixing sleeve (27). A spring (28) is also fixedly arranged at the bottom of the inner wall of the fixing sleeve (27), and the top of the spring (28) is fixedly connected to the bottom end of the telescopic rod (26).

6. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: A cleaning frame (30) is rotatably provided at the bottom of the press-fitting head (29) and the top of the press-fitting frame (2), and a plurality of cleaning brushes (31) are provided on opposite sides of the two cleaning frames (30). A material guide channel is provided inside the upper and lower cleaning frames (30), and the interiors of the plurality of cleaning brushes (31) are communicated with the interiors of the material guide channels. A material guide ring (33) is fixedly provided inside the press-fitting head (29) and the press-fitting frame (2), and the interiors of the two material guide rings (33) are respectively communicated with the material guide channels inside the two cleaning frames (30).

7. The bearing press-fitting device adapted for bearing assembly according to claim 6, characterized in that: The press-fitting head (29) and the press-fitting frame (2) are both provided with driving gears (32) which are rotated by built-in motors, and the surfaces of the two driving gears (32) are respectively meshed with the outer peripheral surfaces of the two cleaning frames (30) for transmission.

8. The bearing press-fitting device adapted for bearing assembly according to claim 1, characterized in that: Two servo electric cylinders (35) are fixedly arranged at the lower part of the press-mounted frame (2), and a closed annular frame (34) is movably arranged at the upper part of the press-mounted frame (2). The top ends of the driving ends of the two servo electric cylinders (35) are fixedly connected to the bottom of the closed annular frame (34), and a plurality of discharge holes are arranged at the top of the press-mounted frame (2).

9. A bearing press-fitting method adapted for bearing assembly, characterized in that: The bearing press-fitting device adapted for bearing assembly as described in any one of claims 1 to 8 comprises the following steps: Step 1: After the bearing and the end cover are placed in the two discharge troughs (14) on the left and right sides respectively, the inside of the bearing and the outer peripheral surface of the end cover are positioned respectively by positioning movable rods (15) movably arranged inside the two discharge troughs (14); Step 2: After placing the bearing on the unloading rack (3) on the left, the adjustment rack (17) on the left is controlled to descend until the bottom of the oiling rack (18) contacts the top of the unloading rack (3). At this time, the entire bearing is inside the rotating rack (20). The oiling brushes (23) are driven to approach the outer surface of the bearing by using a plurality of micro-electric cylinders (22) inside the rotating rack (20) until one side of the plurality of oiling brushes (23) contacts the outer surface of the bearing. Lubricating oil is then fed into the plurality of oiling brushes (23) through the oil guide ring (24) on the top of the rotating rack (20). Finally, the rotating rack (20) is controlled to rotate inside the oiling rack (18), and the outer peripheral surface of the bearing is oiled under the action of the plurality of oiling brushes (23). Step 3: Use the oiling rack 2 (19) and the rotating rack 2 (21) on the right side to apply oil to the inner surface of the end cover, using the same operation steps as the oiling of the outer surface of the bearing, except that when applying oil to the inner surface of the end cover, the rotating rack 2 (21) is entirely located inside the end cover, and a plurality of oiling brushes (23) provided on the rotating rack 2 (21) are in contact with the inner surface of the end cover, and the rotating rack 2 (21) is controlled to rotate, thereby achieving automatic oiling of the inner surface of the end cover; Step 4: When loading the bearing and the end cover, the servo electric cylinder 1 (11) on the left side is used to control the servo electric cylinder 2 (12) to lift upward, and the servo electric cylinder 2 (12) is used to control the finger slide cylinder (13) to extend to the top of the unloading rack (3) on the left side. Then, the servo electric cylinder 1 (11) is controlled to retract its driving end, so that the two clamping fingers of the finger slide cylinder (13) are respectively located on both sides of the bearing surface. The two clamping fingers on the finger slide cylinder (13) are used to clamp and position the upper part of the bearing surface. Then, the servo electric cylinder 1 (11) is controlled to extend its driving end, and the servo electric cylinder 2 (12) is retracted at the same time. Cooperating with the servo linear slide (9), the sliding block (10) on the left side is driven to slide toward one side of the press-fitting frame (2), so that the bearing inside the finger slide cylinder (13) is located directly in front of the press-fitting frame (2). At this time, the driving end of the servo electric cylinder 2 (12) is controlled to extend, and the bearing is sent to the middle position of the top of the press-fitting frame (2), completing the automatic loading operation of the bearing. Then, the same operation is adopted, and the servo electric cylinder 1 (11) and the servo electric cylinder 2 (12) on the right side cooperate with the finger slide cylinder (13) to send the end cover above the right unloading frame (3) to the middle position above the press-fitting frame (2), completing the automatic positioning and loading of the two components of the bearing and the end cover; Step 5: Control the driving end of the gas-liquid booster cylinder (8) to drive the press-fitting head (29) to move downward, and use the press-fitting head (29) to automatically press-fit the end cover and the bearing. When the bearing and the end cover are pressed, the bottom end of the press-fitting head (29) contacts the top end of the telescopic rod (26), and when the press-fitting head (29) continues to press downward, the convex block at the bottom of the press-fitting head (29) pushes the bottom end of the telescopic rod (26) to slide downward inside the fixed sleeve (27) until the bottom of the press-fitting head (29) contacts the top of the bearing and the end cover, completing the press-fitting process between the bearing and the end cover. Step 6: After the press-fitting process between the bearing and the end cover is completed, the closed annular frame (34) is pushed upward by the servo electric cylinder 3 (35) provided inside the press-fitting frame (2) until the top of the closed annular frame (34) contacts the bottom of the connecting plate (6), and a closed chamber is formed by the unloading frame (3), the press-fitting frame (2) and the connecting plate (6). At this time, the press-fitting head (29) and the cleaning frame (30) inside the press-fitting frame (2) are respectively controlled to rotate, and at the same time, the two cleaning frames are pushed through the two guide rings (33). A solvent-based cleaning liquid is introduced into a plurality of cleaning brushes (31) inside the bearing (30), and the cleaning frame (30) rotatably arranged on the upper and lower surfaces of the bearing and the end cover cooperates with the plurality of cleaning brushes (31) to clean the oil stains remaining on the upper and lower surfaces of the bearing and the end cover, and the cleaning waste liquid is discharged through a plurality of discharge holes arranged on the top of the press-fitting frame (2), and dry hot air is introduced into the interior of the cleaning brush (31) through the guide ring (33), and the outer surface of the cleaned bearing and the end cover is dried by the dry hot air.

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