A bore bearing pull-out assist device

Abstract

The utility model relates to mechanical maintenance tool technical field, concretely discloses a kind of inner cavity bearing pull-out auxiliary devices, comprising: bearing disc, multiple threaded holes are opened in the bearing disc, multiple the threaded hole are all threadedly equipped with the pull-out lead screw that vertically penetrates bearing disc, the both ends of the pull-out lead screw are all equipped with limiting nut, its end away from bearing disc is threadedly installed with U-shaped frame, the U-shaped frame is installed distance by limiting nut limit, the end away from bearing disc of the U-shaped frame is equipped with adjusting assembly, two symmetrically arranged pull-out blocks are fixedly arranged on the adjusting assembly, the lower end of the opposite surface of two the pull-out blocks is all fixedly arranged with fixed lug, two the pull-out block movably inserts in the inner and outer ring gap of bearing;The utility model can quickly adjust the distance of two pull-out blocks by adjusting assembly, make it adapt to the inner and outer ring gap of different specifications bearing, simultaneously, inner cavity bearing is quickly pulled out using telescopic component, and pull-out time is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical repair tool technology, specifically relating to an auxiliary device for pulling out an internal bearing. Background Technology

[0002] Rolling bearings, as key components in mechanical systems that support rotating shafts and reduce friction, are widely used in industrial equipment such as pumps, motors, and gearboxes to ensure the smooth operation of shaft systems. However, in the context of equipment cavities, factors such as confined space, component corrosion, and interference fits often present numerous challenges in bearing removal. When bearings show signs of wear or corrosion requiring replacement, efficiently and safely removing them becomes a critical challenge in equipment maintenance.

[0003] Traditional methods for removing bearings, such as hammering or prying with crowbars, are not only difficult to precisely control the direction and force of the force, easily causing the bearing to break or damaging surrounding components, but also time-consuming due to repeated adjustments of the operating angle and force. Some existing removal devices suffer from poor versatility, requiring frequent replacement or readjustment of components when dealing with bearings of different sizes, making the operation cumbersome, time-consuming, and labor-intensive, further exacerbating the problems of long bearing removal times and low efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for pulling out internal bearings, so as to solve the problems of difficulty in removing internal bearings and long bearing removal time.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An auxiliary device for pulling out an internal bearing includes:

[0007] The bearing plate has multiple threaded holes, and each of the multiple threaded holes is threaded with a pull screw that penetrates the bearing plate vertically. Both ends of the pull screw are equipped with limit nuts, and a U-shaped bracket is threadedly installed at the end away from the bearing plate. The U-shaped bracket is limited in installation distance by the limit nuts. An adjustment component is installed at the end of the U-shaped bracket away from the bearing plate. Two symmetrically arranged pull blocks are fixedly installed on the adjustment component. The lower ends of the opposite faces of the two pull blocks are fixedly provided with fixing protrusions. The two pull blocks are movably inserted into the gap between the inner and outer rings of the bearing.

[0008] A first abutment plate and a second abutment plate are respectively provided between the bearing plate and the pump shaft inserted in the bearing. The opposite sides of the first abutment plate and the second abutment plate are respectively attached to the end faces of the bearing plate and the pump shaft, and a telescopic component is fixedly provided on the opposite sides.

[0009] Preferably, the adjusting assembly includes a positive and negative lead screw rotatably disposed within a U-shaped frame. Two adjusting blocks are threaded onto the outer wall of the positive and negative lead screw. The outer walls of the two adjusting blocks are respectively fixedly connected to two pulling blocks. A guide hole is provided on the side away from the pulling block. A guide strip is slidably disposed in both guide holes. Both ends of the guide strip pass through the adjusting blocks and are fixedly disposed on the U-shaped frame. A driving assembly is fixedly disposed on one end face of the positive and negative lead screw.

[0010] Preferably, the drive assembly includes a mounting shell fixedly mounted on the side wall of the U-shaped frame. A first worm and a first worm wheel are rotatably mounted inside the mounting shell. The first worm and the first worm wheel mesh with each other. A rotating shaft is fixedly mounted at the center of the first worm wheel. The rotating shaft is rotatably mounted on the mounting shell. One end of the shaft passes through the mounting shell and is fixedly mounted on the end face of the positive and negative lead screws. One end of the first worm passes through the mounting shell and a handle is fixedly mounted on its end face.

[0011] Preferably, the telescopic assembly includes a sleeve and a telescopic threaded rod. The sleeve has an internal threaded hole adapted to the telescopic threaded rod. The telescopic threaded rod is threadedly inserted into the sleeve. The first abutment plate is fixedly disposed on the end face of the sleeve. The second abutment plate is fixedly disposed on the end face of the telescopic threaded rod away from the sleeve. A power unit for driving its rotation is installed on the telescopic threaded rod.

[0012] Preferably, the power unit includes a protective shell, which is fixedly mounted on the end face of the sleeve away from the first abutment plate. A second worm gear is rotatably mounted inside the protective shell. The telescopic threaded rod is threaded through the center of the second worm gear and the protective shell. A second worm is meshed with the side wall of the second worm gear. A drive shaft is symmetrically fixed at both ends of the second worm. The opposite ends of the two drive shafts are both mounted through and rotatably mounted on the protective shell, and an inward hexagonal groove is formed on the end face.

[0013] Preferably, the width of the two pulling blocks is less than the gap between the inner and outer rings of the bearing, and the fixing protrusion is semi-circular.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By adjusting the cooperation between the positive and negative screws and the worm gear drive structure in the assembly, the distance between the two pulling blocks can be quickly adjusted to adapt to the inner and outer ring clearances of bearings of different specifications. There is no need to repeatedly weld the matching parts, which significantly improves the versatility of the device, simplifies the operation process, greatly shortens the preparation time before bearing disassembly, and reduces maintenance costs and time loss.

[0016] (2) The power unit adopts worm gear transmission combined with hexagonal groove interface, which can be connected to power tools such as electric drills to drive the telescopic threaded rod. The speed reduction and torque increase characteristics of worm gear are used to achieve labor-saving operation. At the same time, the telescopic force and speed are precisely controlled by the handle or power tool, avoiding damage to bearings, pump shaft and cavity caused by traditional violent disassembly, ensuring safe and stable disassembly process, and significantly improving the efficiency and reliability of bearing removal. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention fully assembled inside the bearing;

[0018] Figure 2 This is a cross-sectional perspective view of the telescopic component of this utility model;

[0019] Figure 3 This is a cross-sectional view of the pull block of this utility model in preparation for insertion into the bearing;

[0020] Figure 4 This is a perspective view of the adjustment component of this utility model;

[0021] Figure 5 This is a cross-sectional perspective view of the drive component of this utility model;

[0022] In the diagram: 1. Bearing plate; 2. Pulling screw; 3. Limit nut; 4. U-shaped frame; 5. Adjustment assembly; 6. Drive assembly; 7. Pulling block; 8. Fixing protrusion; 9. Telescopic assembly; 10. First abutment plate; 11. Second abutment plate;

[0023] 51. Lead screw; 52. Adjusting block; 53. Guide bar; 61. Mounting housing; 62. First worm gear; 63. First worm wheel; 64. Shaft; 65. Handle; 91. Sleeve; 92. Telescopic threaded rod; 93. Power unit;

[0024] 931. Protective shell; 932. Second worm gear; 933. Second worm; 934. Drive shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Example 1:

[0028] Please see Figures 1-5 As shown, an auxiliary device for pulling out an internal bearing includes:

[0029] The bearing plate 1 has multiple threaded holes, and each threaded hole is threaded with a pull screw 2 that penetrates the bearing plate 1 vertically. Both ends of the pull screw 2 are equipped with limit nuts 3. A U-shaped frame 4 is threadedly installed at the end away from the bearing plate 1. The installation distance of the U-shaped frame 4 is limited by the limit nuts 3. An adjustment component 5 is installed at the end of the U-shaped frame 4 away from the bearing plate 1. Two symmetrically arranged pull blocks 7 are fixedly installed on the adjustment component 5. The lower ends of the opposite faces of the two pull blocks 7 are fixedly provided with fixing protrusions 8. The two pull blocks 7 are movably inserted into the gap between the inner and outer rings of the bearing.

[0030] A first abutment plate 10 and a second abutment plate 11 are respectively provided between the bearing plate 1 and the pump shaft inserted in the bearing. The opposite sides of the first abutment plate 10 and the second abutment plate 11 are respectively attached to the end faces of the bearing plate 1 and the pump shaft, and the telescopic component 9 is fixedly provided on the opposite sides.

[0031] Depend on Figure 2 It is known that the telescopic component 9 includes a sleeve 91 and a telescopic threaded rod 92. The sleeve 91 has an internal threaded hole adapted to the telescopic threaded rod 92. The telescopic threaded rod 92 is threadedly inserted into the sleeve 91. The first abutment plate 10 is fixedly disposed on the end face of the sleeve 91, and the second abutment plate 11 is fixedly disposed on the end face of the telescopic threaded rod 92 away from the sleeve 91. A power unit 93 for driving its rotation is installed on the telescopic threaded rod 92.

[0032] As shown above, when a bearing malfunctions and needs to be pulled out, the two pull blocks 7 are first inserted vertically along their width into the gap between the inner cavity and the balls. Then, the two pull blocks 7 are rotated 90°, and the key pitch is adjusted by the adjusting component 5, so that the fixed protrusions 8 hook onto the flanges of the inner and outer rings of the bearing, forming a stable pulling fulcrum. The bearing plate 1 serves as a basic support component, and is threadedly connected to the pull screw 2 through multiple threaded holes to form an adjustable support frame. The limiting nuts 3 at both ends of the pull screw 2 are used to limit the distance between the bearing plate 1 and the U-shaped frame 4. By rotating the limiting nuts 3, the distance between the U-shaped frame 4 and the bearing plate 1 can be adjusted to accommodate bearing installation spaces of different depths. At this time, the pull screw 2, the U-shaped frame 4, the adjusting component 5, and the pull blocks 7 constitute a "hook-force transmission" system, providing a force basis for pulling out the bearing.

[0033] The first abutment plate 10 and the second abutment plate 11 between the bearing plate 1 and the pump shaft are connected by the telescopic assembly 9 to form a "fulcrum-thrust" system. The sleeve 91 and the telescopic threaded rod 92 of the telescopic assembly 9 are engaged by an internal threaded hole. When the power unit 93 drives the telescopic threaded rod 92 to rotate, the threaded rod 92 moves linearly along the axial direction of the sleeve 91, similar to the principle of a screw jack.

[0034] The second abutment plate 11 is fixed to the end of the telescopic threaded rod 92, closely adhering to the pump shaft end face, using the pump shaft as a fixed fulcrum; the first abutment plate 10 is fixed to the sleeve 91, fitting against the bearing plate 1. When the telescopic threaded rod 92 extends outward, it pushes the second abutment plate 11 to press against the pump shaft, and at the same time, the sleeve 91 drives the bearing plate 1 to move outward. The bearing plate 1 pulls the U-shaped frame 4 and the pulling block 7 through the pull screw 2, so that the fixing protrusion 8 hooking the inner and outer rings of the bearing applies force outward simultaneously, finally pulling the bearing smoothly out of the pump shaft and cavity.

[0035] Specifically, regarding the above, please refer to... Figure 2 As shown, the power unit 93 includes a protective shell 931, which is fixedly mounted on the end face of the sleeve 91 away from the first abutment plate 10. A second worm gear 932 is rotatably mounted inside the protective shell 931. A telescopic threaded rod 92 is threaded through the center of the second worm gear 932 and the protective shell 931. A second worm 933 is meshed with the side wall of the second worm gear 932. A drive shaft 934 is symmetrically fixed at both ends of the second worm 933. The opposite ends of the two drive shafts 934 are both mounted on the protective shell 931 and are rotatably mounted on the protective shell 931. An inward hexagonal groove is provided on the end face.

[0036] As can be seen from the above, when the drive shaft 934 is driven to rotate by an external tool (such as an electric drill adapted to a hexagonal groove), the drive shaft 934 will drive the second worm 933 fixed thereto to rotate. Since the second worm 933 meshes with the second worm wheel 932, the rotation of the second worm 933 will drive the second worm wheel 932 to rotate. Furthermore, because the thread of the telescopic threaded rod 92 passes through the center of the second worm wheel 932, the rotation of the second worm wheel 932 will cause the telescopic threaded rod 92 to move linearly along its own axis. This converts the circular motion of the drive shaft 934 into the linear motion of the telescopic threaded rod 92, thus providing the necessary power to pull the bearing off the pump shaft. Worm gear transmission has the characteristics of speed reduction and torque amplification, enabling the telescopic threaded rod 92 to obtain a large axial thrust with a relatively small input power, which helps to more easily overcome the interference fit between the bearing and the pump shaft, thus pulling the bearing off.

[0037] Example 2:

[0038] refer to Figure 4 and Figure 5 As shown, the adjustment assembly 5 includes a positive and negative screw 51 rotatably disposed in the U-shaped frame 4. Two adjustment blocks 52 are threadedly sleeved on the outer wall of the positive and negative screw 51. The outer walls of the two adjustment blocks 52 are respectively fixedly connected to two pulling blocks 7. A guide hole is opened on the side away from the pulling block 7. A guide bar 53 is slidably disposed in the two guide holes. Both ends of the guide bar 53 pass through the adjustment block 52 and are fixedly disposed on the U-shaped frame 4. A drive assembly 6 is fixedly disposed on one end face of the positive and negative screw 51.

[0039] The drive assembly 6 includes a mounting shell 61 fixedly mounted on the side wall of the U-shaped frame 4. A first worm 62 and a first worm wheel 63 are rotatably mounted inside the mounting shell 61. The first worm 62 and the first worm wheel 63 mesh with each other. A rotating shaft 64 is fixedly mounted at the center of the first worm wheel 63. The rotating shaft 64 is rotatably mounted on the mounting shell 61. One end of the shaft passes through the mounting shell 61 and is fixedly mounted on the end face of the positive and negative lead screws 51. One end of the first worm 62 passes through the mounting shell 61 and a handle 65 is fixedly mounted on its end face.

[0040] As can be seen from the above, when the operator rotates the handle 65, the first worm 62 rotates accordingly. Since the first worm 62 meshes with the first worm wheel 63, the rotation of the first worm 62 will drive the first worm wheel 63 to rotate. The first worm wheel 63 transmits the rotation to the positive and negative screws 51 through the rotating shaft 64, thereby driving the positive and negative screws 51 to rotate. Since the two threads of the positive and negative screws 51 rotate in opposite directions, under the restriction of the guide bar 53, the two adjusting blocks 52 will move in opposite directions along the guide bar 53, thereby driving the two pulling blocks 7 to move closer or further away. In this way, the inner and outer ring clearances of different bearings can be adjusted accordingly. The small size and flexible adjustment of the spacing between the two pull blocks 7 allow them to be accurately inserted into the gap between the inner and outer rings of the bearing, preparing for the subsequent pulling of the bearing off the pump shaft. The worm gear drive can achieve a large reduction ratio, and the positive and negative screws 51 can be easily driven to rotate by rotating the handle 65, achieving a labor-saving effect. Secondly, the worm gear drive has self-locking properties. When the handle 65 is stopped, the self-locking action between the first worm 62 and the first worm wheel 63 prevents the positive and negative screws 51 from rotating on their own, ensuring that the adjusted spacing of the pull blocks 7 remains stable and guaranteeing the reliability of the device during operation.

[0041] Preferred, Reference Figure 4 As shown, the width of the two pull blocks 7 is less than the gap between the inner and outer rings of the bearing, and the fixing protrusion 8 is semi-circular.

[0042] As can be seen from the above, the purpose of designing the pull block width to be smaller than the bearing clearance is to ensure that the pull block 7 can be easily inserted into the narrow gap between the inner and outer rings of the bearing, and to avoid damage to the bearing due to excessive size causing installation failure or forced insertion.

[0043] The fixed protrusion 8 is designed in a semi-circular shape. Firstly, it increases the tensile strength by fixing the area with the pull block 7. Secondly, the semi-circular surface has a larger contact area with the bearing, so the tensile force can be evenly transmitted to the inner and outer rings of the bearing through the protrusion, preventing local stress concentration that could lead to bearing deformation or breakage.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary device for pulling out an internal bearing, characterized in that, include: The bearing plate (1) has multiple threaded holes, and each of the multiple threaded holes is threaded with a pull screw (2) that penetrates the bearing plate (1) vertically. Both ends of the pull screw (2) are equipped with limit nuts (3), and a U-shaped frame (4) is threaded on the end away from the bearing plate (1). The U-shaped frame (4) is limited by the limit nuts (3). An adjustment component (5) is equipped on the end of the U-shaped frame (4) away from the bearing plate (1). Two symmetrically arranged pull blocks (7) are fixedly arranged on the adjustment component (5). The lower ends of the opposite faces of the two pull blocks (7) are fixedly provided with fixing protrusions (8). The two pull blocks (7) are movably inserted into the gap between the inner and outer rings of the bearing. A first abutting plate (10) and a second abutting plate (11) are respectively provided between the bearing plate (1) and the pump shaft inserted in the bearing. The opposite sides of the first abutting plate (10) and the second abutting plate (11) are respectively attached to the end faces of the bearing plate (1) and the pump shaft, and a telescopic component (9) is fixedly provided on the opposite sides.

2. The auxiliary device for pulling out an internal bearing according to claim 1, characterized in that: The adjustment assembly (5) includes a positive and negative screw (51) rotatably disposed in a U-shaped frame (4). Two adjustment blocks (52) are threaded on the outer wall of the positive and negative screw (51). The outer walls of the two adjustment blocks (52) are respectively fixedly connected to two pulling blocks (7). A guide hole is opened on the side away from the pulling block (7). A guide strip (53) is slidably disposed in the two guide holes. Both ends of the guide strip (53) pass through the adjustment block (52) and are fixedly disposed on the U-shaped frame (4). A drive assembly (6) is fixedly disposed on one end face of the positive and negative screw (51).

3. The auxiliary device for pulling out an internal bearing according to claim 2, characterized in that: The drive assembly (6) includes a mounting shell (61) fixedly mounted on the side wall of the U-shaped frame (4). A first worm (62) and a first worm wheel (63) are rotatably mounted inside the mounting shell (61). The first worm (62) and the first worm wheel (63) mesh with each other. A rotating shaft (64) is fixedly mounted at the center of the first worm wheel (63). The rotating shaft (64) is rotatably mounted on the mounting shell (61). One end of the shaft passes through the mounting shell (61) and is fixedly mounted on the end face of the positive and negative lead screws (51). One end of the first worm (62) passes through the mounting shell (61) and a handle (65) is fixedly mounted on its end face.

4. The auxiliary device for pulling out an internal bearing according to claim 1, characterized in that: The telescopic assembly (9) includes a sleeve (91) and a telescopic threaded rod (92). The sleeve (91) has an internal threaded hole adapted to the telescopic threaded rod (92). The telescopic threaded rod (92) is threadedly inserted into the sleeve (91). The first abutment plate (10) is fixedly disposed on the end face of the sleeve (91). The second abutment plate (11) is fixedly disposed on the end face of the telescopic threaded rod (92) away from the sleeve (91). A power unit (93) for driving its rotation is installed on the telescopic threaded rod (92).

5. The auxiliary device for pulling out an inner cavity bearing according to claim 4, characterized in that: The power unit (93) includes a protective shell (931), which is fixedly mounted on the end face of the sleeve (91) away from the first abutment plate (10). A second worm gear (932) is rotatably mounted inside the protective shell (931). The telescopic threaded rod (92) is threaded through the center of the second worm gear (932) and the protective shell (931). A second worm (933) is engaged with the side wall of the second worm gear (932). A drive shaft (934) is symmetrically fixed at both ends of the second worm (933). The opposite ends of the two drive shafts (934) are both mounted on the protective shell (931) and have an inward hexagonal groove on their end faces.

6. The auxiliary device for pulling out an internal bearing according to claim 1, characterized in that: The width of the two pull blocks (7) is less than the gap between the inner and outer rings of the bearing, and the fixing protrusion (8) is semi-circular.

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