Bearing and assembling method thereof

Abstract

The invention relates to the technical field of bearing machining, in particular to a bearing and an assembling method thereof.The assembling method comprises the following steps that S1, the bearing is placed on an assembling device, and the bearing is symmetrically sleeved with two sleeve plates on the assembling device; s2, the inner ring of the bearing is heated to generate thermal expansion; s3, uniformly expanding the heated inner ring of the bearing in the circumferential direction; s4, the bearing is pressed on the rotating shaft; and S6, cold air is blown to the bearing to promote cooling of the inner ring of the bearing, and the inner ring of the bearing is firmly arranged on the rotating shaft in a sleeving mode. The bearing press-fitting device has the beneficial effects that a bearing can be stabilized and protected to a certain extent in the press-fitting process, and excessive bending deformation of the bearing caused by press-fitting force is avoided.

Description

Technical Field

[0001] This invention relates to the field of bearing processing technology, and more specifically to a bearing and its assembly method. Background Technology

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support rotating mechanical parts, reduce the coefficient of friction during their movement, and ensure their rotational accuracy. Bearings are mainly used to fix shafts.

[0003] A bearing assembly press-fitting device, application number 202120958601.9, describes a device for press-fitting bearings. During press-fitting between rotating shafts, the fasteners on the locating housing not only provide relative fixation for shafts of different diameters, but also, with the support of a synchronizing element, maintain relative fixation between the locating housing and the rotating shaft during downward movement and bearing press-fitting, thus preventing wear caused by relative shaft movement. However, during the press-fitting process, this device is prone to causing excessive bending deformation of the bearing due to the hammering force, thereby affecting the normal assembly and performance of the bearing. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a bearing and its assembly method, which has the advantages of providing a certain degree of stability and protection for the bearing during the press-fitting process, and avoiding excessive bending deformation of the bearing caused by the press-fitting force.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A bearing assembly method includes the following steps:

[0007] S1: Place the bearing onto the assembly device and symmetrically place the two sleeves on the assembly device onto the bearing;

[0008] S2: Heating the inner ring of the bearing to cause it to expand thermally;

[0009] S3: The inner ring of the bearing is uniformly expanded in the circumferential direction after heating;

[0010] S4: Press the bearing onto the shaft;

[0011] S6: Blow cold air onto the bearing to promote cooling of the inner ring, so that the inner ring is firmly fitted onto the shaft.

[0012] The assembly device includes a pressing table with two symmetrically inserted grippers. Two assembly cylinders I are fixedly connected to the pressing table, and the telescopic ends of the two assembly cylinders I are respectively fixed to the two grippers. A rotating shaft is held between the two grippers. Two side frames are symmetrically installed on the pressing table, and portal frames are inserted on the two side frames. Both ends of the portal frames are interference-fitted with storage plates. Each of the two storage plates has a sleeve plate inserted, and each of the two storage plates has an assembly cylinder IV fixedly connected to it. The telescopic ends of the two assembly cylinders IV are respectively fixed to the two sleeve plates.

[0013] Two vertical frames are symmetrically installed on the portal frame. An arc-shaped plate is fixed to the lower end of each of the two vertical frames, and an electric heating element is provided on each of the two arc-shaped plates.

[0014] A drive motor is fixedly connected to the portal frame, and a ring frame is fixedly connected to the output shaft of the drive motor. A crossbeam is fixedly connected to the ring frame, and two vertical frames are symmetrically slidably connected to the crossbeam.

[0015] A dual-shaft motor is fixedly connected to the crossbeam, and lead screws are connected to the output shafts at both ends of the crossbeam via couplings. The two vertical frames are threadedly connected to the two lead screws respectively.

[0016] A drive frame is inserted into the gantry frame, and an annular pressing plate is fixedly connected to the drive frame. An assembly cylinder III is fixedly connected to the gantry frame, and the telescopic end of the assembly cylinder III is fixedly connected to the drive frame; both vertical frames are located inside the annular pressing plate. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 A flowchart of a bearing assembly method;

[0019] Figure 2 Schematic diagram of the overall structure of the assembly device Figure 1 ;

[0020] Figure 3 Schematic diagram of the overall structure of the assembly device Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the press-fitting table.

[0022] Figure 5 This is a structural diagram of the side frame;

[0023] Figure 6 This is a structural schematic diagram of a portal frame;

[0024] Figure 7 This is a schematic diagram of the sleeve structure;

[0025] Figure 8 This is a schematic diagram of the ring frame structure;

[0026] Figure 9 This is a schematic diagram of the arc-shaped plate.

[0027] Figure 10 This is a schematic diagram of the structure of the arc-shaped plate and the bearing.

[0028] Figure 11 This is a schematic diagram of the structure of the annular pressure plate;

[0029] Figure 12 This is a schematic diagram of the vertical groove on the bearing.

[0030] In the diagram: Pressing table 101; gripper 102; assembly cylinder I 103; rotating shaft 104; side frame 105; assembly cylinder II 106; double-acting screw 107; insertion rod 108; gantry frame 201; assembly cylinder III 202; drive motor 203; ring frame 204; crossbeam 205; lead screw 206; vertical frame 207; arc plate 208; electric heating element 209; storage plate 301; sleeve plate 302; assembly cylinder IV 303; drive frame 401; annular pressing plate 402; vertical groove 501. Detailed Implementation

[0031] A bearing assembly method includes the following steps:

[0032] S1: Place the bearing onto the assembly device and symmetrically place the two sleeves 302 on the assembly device onto the bearing;

[0033] S2: Heating the inner ring of the bearing to cause it to expand thermally;

[0034] S3: The inner ring of the bearing is uniformly expanded in the circumferential direction after heating;

[0035] S4: Press the bearing onto the shaft;

[0036] S6: Blow cold air onto the bearing to promote cooling of the inner ring, so that the inner ring is firmly fitted onto the shaft.

[0037] like Figures 2 to 7 As shown:

[0038] The assembly device includes a pressing table 101, on which two grippers 102 are symmetrically inserted. Two assembly cylinders I 103 are fixedly connected to the pressing table 101. The telescopic ends of the two assembly cylinders I 103 are respectively fixedly connected to the two grippers 102. A rotating shaft 104 is held between the two grippers 102. Two side frames 105 are symmetrically installed on the pressing table 101. A portal frame 201 is inserted on the two side frames 105. Both ends of the portal frame 201 are interference-fitted with a storage plate 301. A sleeve plate 302 is inserted on each of the two storage plates 301. An assembly cylinder IV 303 is fixedly connected to each of the two storage plates 301. The telescopic ends of the two assembly cylinders IV 303 are respectively fixedly connected to the two sleeve plates 302.

[0039] The pressing table 101 has multiple screw holes for inserting screws to install the pressing table 101 in the designated position. The rotating shaft is placed between two grippers 102. Two assembly cylinders I 103 are activated, causing the two grippers 102 to move closer together, clamping and fixing the rotating shaft. The part of the rotating shaft to be fitted with the bearing faces upwards. The bearing is placed between two sleeve plates 302. Two assembly cylinders IV 303 are activated, causing the two sleeve plates 302 to move closer together, fitting the bearing into the two sleeve plates 302. The two sleeve plates 302 support the upper and lower ends of the bearing and the circumference of the bearing's outer ring. After the inner ring of the bearing is heated and thermally expanded, the bearing is pressed into place. When the bearing is on the rotating shaft, the two sleeve plates 302 bear the impact force of downward pressing. The impact force is evenly distributed on the two sleeve plates 302 and will not directly act on the heated bearing. This prevents the bearing from undergoing excessive bending deformation due to the hammering force during the pressing process, thus providing a certain degree of stability and protection for the bearing. Due to the interference fit between the storage plate 301 and the portal frame 201, the storage plate 301 can support the two sleeve plates 302 under normal conditions. When the two sleeve plates 302 are subjected to impact force, the storage plate 301 slides downward on the portal frame 201, thereby driving the bearing to move downward and install on the rotating shaft, realizing the assembly between the bearing and the rotating shaft.

[0040] After the pressing is completed, control the two assembly cylinders IV303 to retract and drive the two sleeves 302 to slide away from each other, thereby separating them from the bearing. Blow cold air to the inner ring of the bearing to promote the cooling of the inner ring, so that the inner ring is firmly fitted onto the shaft. Control the two assembly cylinders I103 to extend and drive the two grippers 102 to slide away from each other, thereby removing the shaft.

[0041] like Figures 8 to 9 As shown:

[0042] Two vertical frames 207 are symmetrically installed on the portal frame 201. An arc plate 208 is fixed to the lower end of each of the two vertical frames 207. An electric heating element 209 is provided on each of the two arc plates 208.

[0043] Both arc-shaped plates 208 are located between the two sleeve plates 302. Before installing the bearing, the bearing is first placed on the two arc-shaped plates 208 so that the two arc-shaped plates 208 correspond to the inner ring of the bearing. Then, the two sleeve plates 302 are controlled to move closer to each other and be placed on the bearing. The two electric heating elements 209 are then activated to heat the inner ring of the bearing, so that the bearing can be pressed more smoothly.

[0044] like Figure 8 As shown:

[0045] A drive motor 203 is fixedly connected to the portal frame 201. A ring frame 204 is fixedly connected to the output shaft of the drive motor 203. A crossbeam 205 is fixedly connected to the ring frame 204. Two vertical frames 207 are symmetrically slidably connected to the crossbeam 205.

[0046] The drive motor 203 starts and drives the ring frame 204 to rotate. The ring frame 204 drives the two vertical frames 207 to rotate through the crossbeam 205. The two vertical frames 207 drive the two arc plates 208 to make circumferential motion, thereby rotating and heating the inner ring of the bearing, so that the inner ring of the bearing is heated evenly and stress concentration is avoided during the press-fitting process.

[0047] like Figure 8 As shown:

[0048] A dual-shaft motor is fixedly connected to the crossbeam 205. Both output shafts at both ends of the crossbeam 205 are connected to lead screws 206 via couplings. The two vertical frames 207 are threadedly connected to the two lead screws 206 respectively.

[0049] The dual-axis motor is started to drive the two lead screws 206 to rotate. The threads on the two lead screws 206 rotate in opposite directions, which in turn drives the two vertical frames 207 to move slowly away from each other. The two vertical frames 207 drive the two arc plates 208 to move away from each other. The two arc plates 208, which are making circular motion, come into contact with the heated bearing inner ring, and then uniformly compress the bearing inner ring in the circumferential direction. This causes the bearing inner ring to expand uniformly after thermal expansion, which further makes the bearing easier to press-fit. At the same time, the restriction of the two sleeve plates 302 will prevent the bearing from being excessively deformed.

[0050] like Figure 11 As shown:

[0051] A drive frame 401 is inserted into the gantry frame 201, and an annular pressing plate 402 is fixedly connected to the drive frame 401. An assembly cylinder III 202 is fixedly connected to the gantry frame 201, and the telescopic end of the assembly cylinder III 202 is fixedly connected to the drive frame 401; both vertical frames 207 are located inside the annular pressing plate 402.

[0052] When the assembly cylinder Ⅲ202 is started, it drives the drive frame 401 to move up and down reciprocally. The drive frame 401 drives the annular pressing plate 402 to move up and down reciprocally. The annular pressing plate 402 continuously hammers the two sleeve plates 302. The two sleeve plates 302 drive the bearing to move downward and embed it into the rotating shaft to realize the assembly of the bearing and the rotating shaft.

[0053] The inner ring of the annular pressure plate 402 is the same size as the inner ring of the bearing, and the outer ring of the annular pressure plate 402 is the same size as the outer ring of the bearing. This ensures that when the annular pressure plate 402 is hammered downwards, it makes uniform contact with the two sleeve plates 302, and the two sleeve plates 302 are subjected to uniform force. This causes the bearing to move downwards uniformly and be installed on the rotating shaft, avoiding uneven force that could cause the bearing to deform.

[0054] like Figure 4 and 5 As shown:

[0055] Both ends of the lower end of the two side frames 105 are fixedly connected with insert rods 108, and both side frames 105 are slidably connected to the pressing table 101 through the insert rods 108 thereon;

[0056] Two bidirectional screws 107 are rotatably connected to the pressing table 101, and four insert rods 108 are threaded to the two ends of the two bidirectional screws 107 respectively.

[0057] Rotating the two bidirectional screws 107 can drive the two insert rods 108 to slide back and forth on the press table 101, thereby changing the position of the bearing relative to the shaft, so that the bearing and the shaft are in an eccentric position, which is suitable for installing the eccentric bearing onto the shaft.

[0058] like Figures 4 to 5 As shown:

[0059] Assembly cylinders II 106 are fixedly connected to both of the side frames 105, and the telescopic ends of the two assembly cylinders II 106 are on the portal frame 201.

[0060] Activating the two assembly cylinders II106 can move the gantry frame 201 up and down. The gantry frame 201 moves the two storage plates 301, the two sleeve plates 302, and the bearings down to a position close to the rotating shaft, thereby facilitating the quick installation of the bearings.

[0061] like Figures 4 to 5 As shown:

[0062] A bearing assembled by a bearing assembly method has multiple vertical grooves 501 arranged around both the inner and outer rings of the bearing. During use, these grooves can neutralize the deformation caused by the bearing's contraction or expansion due to high or low temperatures, thereby preventing the bearing from being affected in its normal operation.

Claims

1. A bearing assembly method, characterized in that, Includes the following steps: S1: Place the bearing onto the assembly device and symmetrically place the two sleeves (302) on the assembly device onto the bearing; S2: Heating the inner ring of the bearing to cause it to expand thermally; S3: The inner ring of the bearing is uniformly expanded in the circumferential direction after heating; S4: Press the bearing onto the shaft; S6: Blow cold air onto the bearing to promote cooling of the inner ring, so that the inner ring is firmly fitted onto the shaft.

2. The bearing assembly method according to claim 1, characterized in that, The assembly device includes a pressing table (101), on which two grippers (102) are symmetrically inserted. Two assembly cylinders I (103) are fixedly connected to the pressing table (101). The telescopic ends of the two assembly cylinders I (103) are respectively fixedly connected to the two grippers (102). A rotating shaft (104) is held between the two grippers (102). Two side frames (105) are symmetrically installed on the pressing table (101). A portal frame (201) is inserted on the two side frames (105). Both ends of the portal frame (201) are connected to a storage plate (301) with an interference fit. A sleeve plate (302) is inserted on each of the two storage plates (301). An assembly cylinder IV (303) is fixedly connected to each of the two storage plates (301). The telescopic ends of the two assembly cylinders IV (303) are respectively fixedly connected to the two sleeve plates (302).

3. The bearing assembly method according to claim 1, characterized in that, Two vertical frames (207) are symmetrically installed on the portal frame (201). The lower ends of the two vertical frames (207) are fixed with arc-shaped plates (208), and electric heating elements (209) are provided on the two arc-shaped plates (208).

4. The bearing assembly method according to claim 1, characterized in that, A drive motor (203) is fixedly connected to the portal frame (201), and a ring frame (204) is fixedly connected to the output shaft of the drive motor (203). A crossbeam (205) is fixedly connected to the ring frame (204), and two vertical frames (207) are symmetrically slidably connected to the crossbeam (205).

5. The bearing assembly method according to claim 4, characterized in that, A dual-shaft motor is fixedly connected to the crossbeam (205). The output shafts at both ends of the crossbeam (205) are connected to lead screws (206) via couplings. The two vertical brackets (207) are threadedly connected to the two lead screws (206) respectively.

6. The bearing assembly method according to claim 5, characterized in that, A drive frame (401) is inserted into the gantry frame (201), and an annular pressing plate (402) is fixedly connected to the drive frame (401). An assembly cylinder III (202) is fixedly connected to the gantry frame (201), and the telescopic end of the assembly cylinder III (202) is fixedly connected to the drive frame (401). Both vertical frames (207) are located inside the annular pressing plate (402).

7. The bearing assembly method according to claim 6, characterized in that, Both ends of the lower ends of the two side frames (105) are fixed with insert rods (108), and the two side frames (105) are slidably connected to the pressing table (101) through the insert rods (108) on them.

8. The bearing assembly method according to claim 7, characterized in that, Two bidirectional screws (107) are rotatably connected to the pressing table (101), and four insert rods (108) are threaded to the two ends of the two bidirectional screws (107).

9. The bearing assembly method according to claim 8, characterized in that, Assembly cylinders II (106) are fixedly connected to both of the side frames (105), and the telescopic ends of the two assembly cylinders II (106) are on the portal frame (201).

10. A bearing assembled by a bearing assembly method according to any one of claims 1 to 9, characterized in that, The bearing has multiple vertical grooves (501) surrounding both the inner and outer rings.

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