Large bearing dismounting device

Abstract

The utility model discloses a large bearing dismounting device which comprises a hydraulic cylinder, a flange plate, a long bolt, a supporting disc, a bearing inner ring, a dismounting ring, a circular ring and a main shaft. The bearing inner ring and the dismounting ring are arranged on a bearing mounting position at the left end of the main shaft in a sleeving manner; a plurality of through holes A are uniformly distributed in the upper end surface of the circular ring; a supporting disc is arranged on the left end face of the spindle, a flange plate is arranged on the left side of the supporting disc, a hydraulic cylinder is arranged on the left end face of the flange plate, a piston rod of the hydraulic cylinder penetrates through a center hole of the flange plate to make contact with the left end face of the supporting disc, and a plurality of slotted holes are evenly distributed in the upper end face of the flange plate. The long bolt penetrates through the long slotted hole and penetrates out of the right end of the through hole A, and a large nut is arranged at the penetrating-out end; the device is simple in structure, low in manufacturing cost, convenient to operate and wide in application range; the device contacts the bearing through the dismounting ring, so that the bearing and the main shaft can be effectively prevented from being damaged; the hydraulic cylinder is used for outputting acting force, and the bearing dismounting requirements of large interference magnitude and large friction force can be met.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing disassembly, and in particular relates to a large-scale bearing disassembly device. Background Art

[0002] Bearings are important components in modern mechanical equipment, playing the role of support and rotation. In large equipment, in order to prevent the inner ring of the bearing and the shaft from rotating relative to each other during operation, a large interference fit is often used for assembly. However, when the bearing needs to be removed for inspection or repair, the large interference fit generates a large friction force, making it difficult to remove the bearing from the shaft intact.

[0003] A Chinese patent (publication number: CN218313305U) discloses a universal bearing puller, which consists of a weld mother steel plate, a hexagonal screw, a lead rod, an external buckle ball head and an external buckle small hook. The lower end of the lead rod is connected to the bearing through an external buckle ball head or an external buckle small hook, and the upper end of the lead rod is connected to the weld mother steel plate. The hexagonal screw is installed in the weld mother steel plate through a threaded connection. When the hexagonal screw moves downward through rotation and hits the support, the lead rod pulls the bearing upward according to the reaction force to realize the disassembly of the bearing.

[0004] However, the above-mentioned universal bearing puller has many shortcomings when applied to the disassembly of large bearings. For example, in this patent, an external ball head or an external hook is used to connect with the bearing, and the contact area is small, which can easily damage the bearing and cannot ensure that the bearing can be disassembled intact. In this patent, the support is pushed down by rotating the hexagonal screw, and the reaction force generated is limited, making it difficult to remove bearings with large interference fit. Utility Model Content

[0005] In response to the problems existing in the background technology, the utility model provides a large-scale bearing disassembly device, which contacts the bearing through a disassembly ring, thereby increasing the contact area and reducing the pressure in the contact area, thereby effectively avoiding damage to the bearing and the main shaft; the device utilizes a hydraulic cylinder to output force, and the output force is large, which can meet the requirements for disassembly of bearings with large interference and high friction.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a large-scale bearing disassembly device, comprising a hydraulic cylinder, a flange, a long bolt, a support disc, a bearing inner ring, a disassembly ring, a circular ring and a main shaft; the bearing inner ring and the disassembly ring are sleeved on the bearing mounting position at the left end of the main shaft, the left end face of the disassembly ring is in contact with the right end face of the bearing inner ring, the circular ring is clamped on the outside of the main shaft, the left end face of the circular ring is in contact with the right end face of the disassembly ring, and a plurality of through holes A are evenly distributed on the upper end face of the circular ring; a support disc is provided on the left end face of the main shaft, a flange is provided on the left side of the support disc, a hydraulic cylinder is provided on the left end face of the flange, a piston rod of the hydraulic cylinder passes through the center hole of the flange and contacts with the left end face of the support disc, a plurality of long slot holes are evenly distributed on the upper end face of the flange, and the long slot holes are adapted to the through holes A; the long bolt passes through the long slot hole and passes out from the right end of the through hole A, and a large nut is provided on the passing end of the long bolt.

[0007] The circular ring comprises a semicircular ring A and a semicircular ring B. A connecting block is provided at the connection between the semicircular ring A and the semicircular ring B, and the connecting blocks are connected by bolts. The diameter of the central hole of the circular ring is larger than the outer diameter of the main shaft and smaller than the outer diameter of the disassembly ring.

[0008] The outer diameter of the supporting disc is larger than the inner hole diameter of the main shaft; a boss is arranged on the right end surface of the supporting disc, and the diameter of the boss is not larger than the inner hole diameter of the main shaft.

[0009] The flange is a circular ring, the diameter of the center hole of the flange is larger than the diameter of the piston rod, a plurality of mounting holes are arranged at the edge of the inner hole of the flange, and the hydraulic cylinder is mounted on the mounting holes by bolts.

[0010] The long slot holes are evenly distributed radially on the upper end surface of the flange, and the width of the long slot holes is greater than the outer diameter of the long bolts.

[0011] The diameter of the through hole A is larger than the diameter of the long bolt.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a large-scale bearing disassembly device, which has a simple structure, low processing difficulty, low manufacturing cost, convenient operation and a wide range of applications; the device contacts the bearing through a disassembly ring, thereby increasing the contact area and reducing the pressure in the contact area, and can effectively avoid damage to the bearing and the main shaft; the device utilizes a hydraulic cylinder to output a force, and the output force is large, which can meet the requirements for disassembly of bearings with large interference and large friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a cross-sectional view of the utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the flange.

[0016] Figure 4 A schematic diagram of the structure of a ring.

[0017] In the figure: 1. hydraulic cylinder, 11. piston rod, 2. flange, 21. long slot hole, 23. mounting hole, 3. long bolt, 4. support disc, 41. boss, 5. bearing inner ring, 6. disassembly ring, 7. ring, 71. semicircular ring A, 72. through hole A, 73. connecting block, 74. semicircular ring B, 8. large nut, 9. main shaft. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] The following is combined with Figure 1-4 The specific implementation of the utility model is further elaborated in detail: a large bearing disassembly device, comprising a hydraulic cylinder 1, a flange 2, a long bolt 3, a support disc 4, a bearing inner ring 5, a disassembly ring 6, a ring 7 and a main shaft 9; the bearing inner ring 5 and the disassembly ring 6 are sleeved on the bearing mounting position at the left end of the main shaft 9, and the left end face of the disassembly ring 6 is in contact with the right end face of the bearing inner ring 5; in order to ensure that the disassembly process does not cause damage to the bearing, the bearing needs to be used in conjunction with the disassembly ring 6 when installing the machine; in order to reduce the disassembly resistance and facilitate the disassembly of the bearing, the inner hole diameter of the disassembly ring 6 is larger than the outer diameter of the bearing mounting position of the main shaft 9;

[0020] The circular ring 7 is clamped on the outside of the main shaft 9, the left end face of the circular ring 7 is in contact with the right end face of the disassembly ring 6, and a plurality of through holes A72 are evenly distributed on the upper end face of the circular ring 7, and the diameter of the through hole A72 is larger than the diameter of the long bolt 3; the circular ring 7 includes a semicircular ring A71 and a semicircular ring B74, and a connecting block 73 is provided at the connection between the semicircular ring A71 and the semicircular ring B74, and the connecting block 73 is connected by bolts; the diameter of the central hole of the circular ring 7 is larger than the outer diameter of the main shaft 9 and smaller than the outer diameter of the disassembly ring 6;

[0021] A support disc 4 is provided on the left end face of the spindle 9, and a flange 2 is provided on the left side of the support disc 4, and the outer diameter of the support disc 4 is larger than the inner hole diameter of the spindle 9; a boss 41 is provided on the right end face of the support disc 4, and the diameter of the boss 41 is not larger than the inner hole diameter of the spindle 9; in order to enable the thrust of the piston rod 11 to be transmitted to the spindle 9, a support disc 4 is provided on the end face of the spindle 9; the boss 41 of the support disc 4 is embedded in the inner hole of the spindle 9, and the two are clearance-matched; if the spindle 9 is a solid shaft, the support disc 4 is not required during the bearing disassembly process, and the piston rod 11 can be directly pressed against the center position of the end face of the spindle 9; a hydraulic cylinder 1 is provided on the left end face of the flange 2, and the piston rod 11 of the hydraulic cylinder 1 The center hole passing through the flange 2 contacts the left end face of the supporting disc 4, and a plurality of long slot holes 21 are evenly distributed on the upper end face of the flange 2. The long slot holes 21 are evenly distributed radially on the upper end face of the flange 2, and the width of the long slot holes 21 is greater than the outer diameter of the long bolts 3, and the long slot holes 21 are adapted to the through hole A72; the flange 2 is a circular ring, and the diameter of the center hole of the flange 2 is greater than the diameter of the piston rod 11. A plurality of mounting holes 23 are provided at the edge of the inner hole of the flange 2, and the hydraulic cylinder 1 is mounted on the mounting holes 23 by bolts; after the long bolt 3 passes through the long slot hole 21, it passes out from the right end of the through hole A72, and a large nut 8 is provided at the passing end of the long bolt 3; the long bolt 3 does not interfere with the bearing and the disassembly ring 6.

[0022] The use process of the utility model is as follows: when disassembling, first assemble all the parts in the device; then control the hydraulic cylinder 1 so that the piston rod 11 slowly applies thrust, and the support disc 4 and the main shaft 9 move to the right relative to the hydraulic cylinder 1 under the action of the thrust; due to the restrictions of the long bolts 3 and the nuts 8, the positions of the ring 7, the disassembly ring 6 and the bearing inner ring 5 relative to the hydraulic cylinder 1 remain unchanged; the bearing inner ring 5 produces axial displacement relative to the main shaft 9, and finally the bearing inner ring 5 is disassembled from the main shaft 9; in actual operation, if the stroke of the piston rod 11 of the hydraulic cylinder 1 is too short, the bearing inner ring 5 is not disassembled after the piston rod 11 ends a stroke operation; at this time, the piston rod 11 can be retracted, the large nut 8 can be tightened, and the piston rod 11 of the hydraulic cylinder 1 can be controlled to apply thrust again, and the above steps can be repeated, and finally the bearing inner ring 5 can be disassembled from the main shaft 9.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0024] The parts not described in detail in this utility model are prior art.

Claims

1. A large bearing disassembly device, comprising a hydraulic cylinder (1), a flange (2), a long bolt (3), a support disc (4), a bearing inner ring (5), a disassembly ring (6), a circular ring (7) and a main shaft (9); the bearing inner ring (5) and the disassembly ring (6) are sleeved on the bearing mounting position at the left end of the main shaft (9), and the left end surface of the disassembly ring (6) contacts the right end surface of the bearing inner ring (5), wherein: The circular ring (7) is clamped on the outside of the main shaft (9), the left end face of the circular ring (7) contacts the right end face of the disassembly ring (6), and a plurality of through holes A (72) are evenly distributed on the upper end face of the circular ring (7); a supporting disc (4) is provided on the left end face of the main shaft (9), a flange (2) is provided on the left side of the supporting disc (4), a hydraulic cylinder (1) is provided on the left end face of the flange (2), a piston rod (11) of the hydraulic cylinder (1) passes through the center hole of the flange (2) and contacts the left end face of the supporting disc (4), a plurality of long slot holes (21) are evenly distributed on the upper end face of the flange (2), and the long slot holes (21) are matched with the through holes A (72); the long bolts (3) pass through the long slot holes (21) and pass out from the right end of the through holes A (72), and a large nut (8) is provided at the passing end of the long bolts (3).

2. A large bearing disassembly device according to claim 1, characterized in that: The circular ring (7) comprises a semicircular ring A (71) and a semicircular ring B (74); a connecting block (73) is provided at the connection between the semicircular ring A (71) and the semicircular ring B (74); the connecting blocks (73) are connected by bolts; the diameter of the center hole of the circular ring (7) is larger than the outer diameter of the main shaft (9) and smaller than the outer diameter of the disassembly ring (6).

3. A large bearing disassembly device according to claim 1, characterized in that: The outer diameter of the support disc (4) is larger than the inner diameter of the main shaft (9); a boss (41) is provided on the right end surface of the support disc (4), and the diameter of the boss (41) is not larger than the inner diameter of the main shaft (9).

4. A large bearing disassembly device according to claim 1, characterized in that: The flange (2) is a circular ring, the diameter of the center hole of the flange (2) is larger than the diameter of the piston rod (11), a plurality of mounting holes (23) are provided at the edge of the inner hole of the flange (2), and the hydraulic cylinder (1) is mounted on the mounting holes (23) by means of bolts.

5. A large bearing disassembly device according to claim 1, characterized in that: The long slot holes (21) are evenly distributed in a radial pattern on the upper end surface of the flange (2), and the width of the long slot holes (21) is greater than the outer diameter of the long bolts (3).

6. A large bearing disassembly device according to claim 1, characterized in that: The diameter of the through hole A (72) is greater than the diameter of the long bolt (3).

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