A bearing mounting structure facilitating bearing play adjustment

Abstract

The application belongs to the technical field of motor bearing installation, and discloses a motor bearing installation structure facilitating bearing clearance adjustment, which comprises an end cover, a bearing seat, an outer check ring, an outer seal ring, an inner check ring, an inner seal ring, a rotating shaft and a bearing. The inner seal ring and the outer seal ring are assembled on the rotating shaft, the bearing is assembled between the inner seal ring and the outer seal ring of the rotating shaft and is installed in the bearing seat, the outer check ring and the inner check ring are respectively assembled on the outer side and the inner side of the bearing seat, the outer check ring and the outer seal ring form a rotating seal, and the inner check ring and the inner seal ring form a rotating seal. The bearing seat is fixedly installed in the end cover through the outer flange thereof, and the outer adjusting gasket is assembled between the outer flange and the end cover. The application can quickly adjust the clearance without completely disassembling the bearing, simplifies the process, improves the efficiency, ensures reliable axial positioning and improves the operation reliability.

Description

Technical Field

[0001] This invention relates to the field of motor bearing installation technology, and specifically to a bearing installation structure that facilitates bearing clearance adjustment. Background Technology

[0002] Bearings, as one of the key components in an electric motor, play a crucial role in the motor's stable operation. When a motor is subjected to large load impacts, bearings capable of withstanding significant loads must be selected. Taking tapered roller bearings as an example, the bearing requires multiple disassemblies and adjustments to its axial clearance during installation. Therefore, the ease of disassembly and reliable positioning of the bearing's mounting structure are particularly important. Patent CN218953853U proposes a structure using elastic wave washers to adjust the bearing's axial clearance. This structure designs two bushings with upper and lower wave washers between the bearing clearances for bearing fixation and positioning. However, this patent does not address adjustment methods when the bearing clearance is unsuitable after installation, and therefore cannot solve the practical difficulties encountered in adjusting bearing clearance during current motor bearing installation. Summary of the Invention

[0003] In view of this, the present invention provides a bearing mounting structure that facilitates bearing clearance adjustment, optimizes the bearing clearance adjustment process, solves the problem of difficult bearing clearance adjustment during motor bearing installation, and improves motor installation efficiency. It also provides a reliable bearing axial positioning solution, reducing the risk of bearing axial displacement during motor operation and improving motor operational reliability.

[0004] The objective of this invention is achieved through the following technical solution: A motor bearing mounting structure for easy adjustment of bearing clearance includes an end cover, a bearing housing, an outer retaining ring, an outer sealing ring, an inner retaining ring, an inner sealing ring, a rotating shaft, and a bearing. The inner and outer sealing rings are assembled on the rotating shaft, and the bearing is assembled between the inner and outer sealing rings of the rotating shaft and installed in the bearing housing. The outer and inner retaining rings are respectively assembled on the outer and inner sides of the bearing housing, forming a rotational seal between the outer retaining ring and the outer sealing ring, and a rotational seal between the inner retaining ring and the inner sealing ring. The bearing housing is fixedly installed in the end cover by its outer flange, and an outer adjusting shim is fitted between the outer flange and the end cover.

[0005] If the bearing installation clearance is found to be unsuitable, the bearing housing can be moved outward during clearance adjustment. This can be achieved by replacing the external adjusting shims with different thicknesses (replace with thicker shims if the clearance is too large, and with thinner shims if the clearance is too small).

[0006] Preferably, the outer flange of the bearing housing is fixedly mounted on the end cover by a number of mounting bolts II; a set screw hole is provided on the outer flange, and a set screw bolt is inserted into the set screw hole to move the bearing housing outward relative to the end cover; a countersunk hole is provided on the end cover, and the set screw bolt is inserted into the corresponding countersunk hole after passing through the set screw hole.

[0007] Preferably, the outer adjusting shim has an installation through hole and a positioning groove. The installation through hole is used to pass through the mounting bolt II. The position of the positioning groove corresponds to the position of the set screw hole on the outer flange of the bearing seat, so as to avoid the set screw and to install and position the outer adjusting shim.

[0008] Preferably, the inner retaining ring is fixedly assembled to the inner side of the bearing housing by mounting bolt I, and an inner adjusting shim is assembled between the inner retaining ring and the bearing housing.

[0009] Preferably, the end of the mounting bolt I extends more than 3mm beyond the end face of the inner retaining ring.

[0010] Similarly, if the bearing clearance is not properly installed, it can be adjusted by replacing the inner adjusting shims with different thicknesses.

[0011] Preferably, the outer sealing ring is assembled onto the rotating shaft by an interference fit.

[0012] Preferably, the outer sealing ring is threaded onto the rotating shaft; the outer sealing ring and the rotating shaft are stopped by spot welding; or, the outer sealing ring and the rotating shaft are stopped by a locking element.

[0013] Preferably, the locking element includes a locking bolt and a locking clip, the rotating shaft is provided with a locking groove, the lower end of the locking clip is located in the locking groove and its upper end is locked with the outer sealing ring, the locking bolt passes through the middle of the locking clip and is threaded to the outer sealing ring; a locking washer is provided between the locking bolt and the locking clip.

[0014] Preferably, the rotating shaft is provided with a stop groove, and a stop block for restricting the movement of the outer sealing ring is installed in the stop groove.

[0015] All three methods mentioned above (interference fit, threaded connection with spot welding, locking element stop, and stop block limit) can achieve reliable bearing positioning and prevent bearing displacement during motor operation.

[0016] Preferably, a labyrinth seal structure is provided between the outer sealing ring and the outer retaining ring, and the labyrinth seal direction is set so that the outer retaining ring can be installed after the bearing clearance adjustment is completed.

[0017] The technical solution provided by this invention has the following advantages compared with the prior art: First, the present invention, through the separate design of the end cover, bearing seat, outer retaining ring and inner retaining ring and the setting of replaceable adjustment shims, can realize the rapid adjustment of bearing clearance without completely disassembling the bearing and related components. This fundamentally solves the technical problem that clearance adjustment in the prior art requires complete disassembly, greatly simplifies the adjustment process, and significantly improves the installation and debugging efficiency of the motor.

[0018] Secondly, the auxiliary support of the set screw and the step-by-step operation prevent sudden displacement or detachment of parts during the adjustment process, making the operation safe and controllable; the matching design of the positioning groove and the set screw ensures the accurate positioning of the adjusting shim and ensures the adjustment accuracy.

[0019] Third, for different motor operating conditions and axial force levels, a variety of external sealing ring positioning solutions are provided, such as interference fit, threaded connection with spot welding, locking element stop, and stop block limit. Users can choose flexibly according to actual needs, which has a wide range of applications and strong adaptability.

[0020] Fourth, the axial oil passage sealing structure formed between the inner retaining ring and the inner sealing ring ensures the adjustable clearance while also taking into account the lubrication and sealing requirements of the bearing, thus guaranteeing good lubrication conditions during bearing operation.

[0021] Fifth, the multiple bearing axial positioning methods effectively reduce the risk of axial displacement of the bearings during motor operation and improve the long-term operational reliability of the motor.

[0022] This invention is reasonably designed, allowing for quick adjustment of clearance without completely disassembling the bearing, simplifying the process, improving efficiency, ensuring reliable axial positioning, and enhancing operational reliability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the structure for installing external adjustment shims.

[0024] Figure 2 This is a schematic diagram showing the structure with both external and internal adjusting shims installed simultaneously.

[0025] Figure 3 This diagram illustrates the use of a locking element to stop the outer sealing ring.

[0026] Figure 4 This is a schematic diagram of the locking element structure.

[0027] Figure 5 This diagram illustrates the use of a stop block to block the outer sealing ring.

[0028] Figure 6 This diagram illustrates the adjustment of the labyrinth seal direction between the outer retaining ring and the outer sealing ring.

[0029] Figure 7This diagram illustrates the state of moving the bearing housing outward using a set screw.

[0030] Figure 8 This is a schematic diagram of the external adjustment shim structure.

[0031] In the diagram: 1-End cap; 2-Outer adjusting shim; 3-Bearing housing; 4-Outer retaining ring; 5-Outer sealing ring; 6-Shaft; 7-Bearing; 8-Inner sealing ring; 9-Inner retaining ring; 10-Mounting bolt I; 11-Mounting bolt II; 12-Inner adjusting shim; 13-Locking element; 131-Locking bolt; 132-Locking shim; 133-Locking clip; 134-Locking slot; 14-Stop block; 15-Setting screw; 301-Outer flange; 201-Mounting through hole; 202-Positioning groove. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0033] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0035] The specific embodiments of the present invention will be described in detail below. Example 1

[0036] like Figure 1As shown, a motor bearing mounting structure for easy bearing clearance adjustment includes an end cover 1, a bearing housing 3, an outer adjusting shim 2, an inner adjusting shim 12, an outer sealing ring 5, an outer retaining ring 4, an inner sealing ring 8, an inner retaining ring 9, and a bearing 7. The outer flange 301 of the bearing housing 3 is fixedly mounted on the end cover 1 by several mounting bolts II 11. The outer flange 301 has a set screw hole, and a set screw 15 passes through the set screw hole to move the bearing housing 3 outward relative to the end cover 1. The end cover 1 has a corresponding countersunk hole, and the set screw 15 passes through the set screw hole and is inserted into the corresponding countersunk hole. An outer adjusting shim 2 is assembled between the outer flange 301 and the end cover 1. The outer adjusting shim 2 has a mounting through hole 201 and a positioning groove 202. The mounting through hole 201 is used to pass through the mounting bolts II 11, and the position of the positioning groove 202 corresponds to the position of the set screw hole on the outer flange 301 of the bearing housing 3. The inner sealing ring 8 and outer sealing ring 5 are installed on the rotating shaft 6. The bearing 7 is assembled between the inner sealing ring 8 and outer sealing ring 5 of the rotating shaft 6 and installed in the bearing housing 3. The outer retaining ring 4 and inner retaining ring 9 are respectively assembled on the outer and inner sides of the bearing housing 3. A labyrinth seal structure is set between the outer retaining ring 4 and the outer sealing ring 5, and the labyrinth seal direction is set so that the outer retaining ring 4 can be installed after the bearing clearance adjustment is completed. The inner retaining ring 9 is fixedly assembled to the inner side of the bearing housing 3 by mounting bolt I10. The end of the mounting bolt I10 protrudes more than 3mm from the end face of the inner retaining ring 9 to reserve operating space for subsequent clearance adjustment. An inner adjusting shim 12 can also be installed between the inner retaining ring 9 and the bearing housing 3. The inner adjusting shim 12 is also a two-section split design. The inner sealing ring 8 forms the inner positioning surface of the bearing inner ring, and the inner retaining ring 9 forms the positioning surface of the bearing outer ring. An axial oil passage sealing structure is formed between the inner retaining ring 9 and the inner sealing ring 8.

[0037] After the motor is installed, if the bearing clearance is found to be unsuitable, the clearance adjustment process is as follows: Step 1: Loosen mounting bolt I10, then push mounting bolt I10 inwards, causing the inner retaining ring 9 to move 2-3mm towards the inside of the motor. At this time, a gap is left between the inner retaining ring 9 and the inner side of the bearing housing 3. Step 2: Install set screw 15, remove mounting bolt II11, and use set screw 15 to slightly move the bearing housing 3 outwards from the motor by 2-3mm. Set screw 15 provides support. Figure 7 As shown; Step 3: Remove the unsuitable outer adjusting shim 2. If the bearing clearance is too large, replace outer adjusting shim 2 with a thicker shim; if the bearing clearance is too small, replace outer adjusting shim 2 with a thinner shim; Step 4: Tighten all bolts to complete the adjustment of the bearing clearance. Figure 8 As shown, in addition to the mounting hole 201, the outer adjusting shim 2 is also designed with a positioning groove 202 at the corresponding position of the set screw hole of the bearing seat 3 to avoid the set screw 15. At the same time, the positioning groove 202 and the set screw 15 serve as positioning structures to facilitate the installation of the new outer adjusting shim 2.

[0038] like Figure 2 As shown, an inner adjusting shim 12 can also be installed between the inner retaining ring 9 and the bearing housing 3. The inner adjusting shim 12 is a two-section split design.

[0039] If the inner adjusting shim 12 needs to be replaced or adjusted, simply perform the first step described above: loosen the mounting bolt I10, and then push the mounting bolt I10 inward, causing the inner retaining ring 9 to move 2-3 mm towards the inside of the motor. At this point, a gap will be left between the inner retaining ring 9 and the inner side of the bearing housing 3. When the bearing clearance is too large, replace the inner adjusting shim 12 with a thinner shim; when the bearing clearance is too small, replace the inner adjusting shim 12 with a thicker shim. Example 2

[0040] To ensure reliable bearing positioning and prevent displacement during motor operation, the outer sealing ring 5 must be reliably fixed. When the motor axial force is small, the bearing can be positioned externally by the interference fit between the outer sealing ring 5 and the shaft 6. When the motor axial force is large, threads can be machined on both the outer sealing ring 5 and the shaft 6, and then spot welded to them. If spot welding is not permitted, slots can be cut into the motor shaft 6 and the outer sealing ring 5, and locking elements 13 can be used to prevent the outer sealing ring 5 from loosening and rotating. Figure 3 , Figure 4 As shown, the locking element 13 consists of a locking bolt 131, a locking washer 132, and a locking clip 133. The rotating shaft 6 has a locking groove 134. The lower end of the locking clip 133 is located within the locking groove 134, and its upper end clamps the outer sealing ring 5. A locking bolt passes through the middle of the locking clip 133 and is threadedly connected to the outer sealing ring 5. A locking washer 132 is provided between the locking bolt 131 and the locking clip 133. The outer sealing ring 5 is threaded onto the rotating shaft 6, thus, due to the action of the locking element 13, the rotation of the outer sealing ring 5 relative to the rotating shaft 6 is restricted.

[0041] When thread machining on the rotating shaft 6 is not permitted, a stop block 14 can be installed on the rotating shaft 6 to restrict the movement of the outer sealing ring 5. Figure 5 As shown, the rotating shaft 6 is provided with a stop groove, and a stop block 14 for limiting the movement of the outer sealing ring 5 is installed in the stop groove. Example 3

[0042] like Figure 6 As shown, when an interference fit is used to meet the positioning requirements of the outer sealing ring 5, or when other positioning methods are used and the size of the outer sealing ring 5 allows, the labyrinth sealing direction of the outer sealing ring 5 and the outer retaining ring 4 can be adjusted. This allows the outer retaining ring 5 to be installed after the bearing clearance adjustment is completed, facilitating proper bearing installation.

[0043] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A motor bearing mounting structure for easy adjustment of bearing clearance, comprising an end cover (1), a bearing housing (3), an outer retaining ring (4), an outer sealing ring (5), an inner retaining ring (9), an inner sealing ring (8), a rotating shaft (6), and a bearing (7); the inner sealing ring (8) and the outer sealing ring (5) are mounted on the rotating shaft (6), and the bearing (7) is mounted between the inner sealing ring (8) and the outer sealing ring (5) of the rotating shaft (6) and installed in the bearing housing (3); the outer retaining ring (4) and the inner retaining ring (9) are respectively mounted on the outer side and the inner side of the bearing housing (3), and a rotational seal is formed between the outer retaining ring (4) and the outer sealing ring (5), and a rotational seal is formed between the inner retaining ring (9) and the inner sealing ring (8); Its features are: The bearing housing (3) is fixedly installed inside the end cover (1) by its outer flange (301), and an outer adjusting shim (2) is assembled between the outer flange (301) and the end cover (1).

2. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 1, characterized in that: The outer flange (301) of the bearing housing (3) is fixedly installed on the end cover (1) by a number of mounting bolts II (11); a set screw hole is provided on the outer flange (301), and a set screw bolt (45) is inserted in the set screw hole to realize the bearing housing (3) moving outward relative to the end cover (1); a countersunk hole is provided on the end cover (1), and the set screw bolt (15) is inserted into the corresponding countersunk hole after passing through the set screw hole.

3. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 1, characterized in that: The outer adjusting shim (2) is provided with an installation through hole (201) and a positioning groove (202). The installation through hole (201) is used to pass through the mounting bolt II (11). The position of the positioning groove (202) corresponds to the position of the set screw hole on the outer flange (301) of the bearing seat (3), and is used to avoid the set screw bolt (15) and to install and position the outer adjusting shim (2).

4. The motor bearing mounting structure for facilitating bearing clearance adjustment according to claim 1, 2, or 3, characterized in that: The inner retaining ring (9) is fixedly assembled to the inside of the bearing seat (3) by mounting bolt I (10), and an inner adjusting shim (12) is assembled between the inner retaining ring (9) and the bearing seat (3).

5. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 4, characterized in that: The outer sealing ring (5) is assembled onto the rotating shaft (6) by an interference fit.

6. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 4, characterized in that: The outer sealing ring (5) is threaded onto the rotating shaft (6); The outer sealing ring (5) and the rotating shaft (6) are stopped by spot welding; Alternatively, the outer sealing ring (5) and the rotating shaft (6) can be stopped by a locking element (13).

7. The motor bearing mounting structure for facilitating bearing clearance adjustment according to claim 6, characterized in that: The locking element (13) includes a locking bolt (131) and a locking clip (133). The rotating shaft (6) is provided with a locking groove (134). The lower end of the locking clip (13) is located in the locking groove (134), and its upper end is clamped to the outer sealing ring (5). The locking bolt (131) passes through the middle of the locking clip (13) and is threaded to the outer sealing ring (5). A locking washer (132) is provided between the locking bolt (131) and the locking clip (133).

8. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 4, characterized in that: The rotating shaft (6) is provided with a stop groove (134), and a stop block (14) for restricting the movement of the outer sealing ring (5) is installed in the stop groove (134).

9. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 1, characterized in that: A labyrinth seal structure is provided between the outer sealing ring (5) and the outer retaining ring (4), and the labyrinth seal direction is set so that the outer retaining ring (4) can be installed after the bearing clearance adjustment is completed.

10. The motor bearing mounting structure for easy bearing clearance adjustment according to claim 4, characterized in that: The end of the mounting bolt I (10) extends more than 3mm beyond the end face of the inner retaining ring (9).

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