A bearing disassembly device

Abstract

This invention discloses a bearing disassembly device, including a stop block, a pull rod, a U-shaped plate, a hydraulic cylinder, a support rod, a support plate, a pin, and a cotter pin. The bottom of the hydraulic cylinder is fixedly connected to the support plate. The telescopic rod end of the hydraulic cylinder is connected to the U-shaped plate via the pin and cotter pin. The U-shaped plate is connected to the end of the pull rod, which is located inside the stop block. One end of the support rod is connected to the support plate, and the other end of the support rod abuts against a component. The stop block has a positioning hole and a slotted hole. The positioning hole is located at the center of the stop block, and the slotted hole and the positioning hole are connected. Utilizing the slotted hole stop plate, compared to conventional pull claws, the structure is simpler and stronger. Moreover, for bearings of different shaft diameters, only the slotted hole stop block needs to be replaced, resulting in better economic efficiency.

Description

Technical Field

[0001] This invention relates to a bearing disassembly device, belonging to the field of engineering machinery excavator assembly technology. Background Technology

[0002] Bearings are one of the most widely used components on excavator working devices, making their disassembly and assembly a crucial step in assembly and maintenance. In excavators, bearings typically have an interference fit with the bearing housing, resulting in very high surface pressure. Furthermore, the symmetrical design of the bearing at both ends, located inside the housing, makes disassembly difficult. Current techniques often involve using an electric saw or heating to break the interference fit, followed by hammering to remove the bearing. However, cutting easily damages the inner surface of the bearing housing, causing significant problems for its future use. Additionally, most commercially available bearing pullers are used to remove bearings. However, the confined space of the bearing housing in excavators makes these pullers impractical, and they rely heavily on manual labor. Given the high surface pressure on excavator bearings, manual removal is extremely difficult, necessitating a new power source. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a bearing disassembly device that solves the problems of poor versatility and easy damage to bearing housings in existing bearing disassembly and assembly devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bearing disassembly device includes a stop block, a pull rod, and a hydraulic cylinder. The stop block is also provided with a positioning hole and a slotted hole. The positioning hole is located at the center of the stop block, and the slotted hole and the positioning hole are connected.

[0006] When the stop block is in the working state, the stop block is in contact with the bearing end face, the tie rod is horizontally inserted in the positioning hole, and the end of the tie rod is connected to the oil cylinder.

[0007] When the stop block is in the adjustment state, the stop block is tilted and inserted into the bearing inner hole, the tie rod is horizontally inserted into the waist-shaped hole, and the end of the tie rod is connected to the oil cylinder.

[0008] Furthermore, the aforementioned also includes U-shaped plates and pins;

[0009] The U-shaped plate is connected to the protruding end of the tie rod;

[0010] The telescopic rod of the hydraulic cylinder has a through hole at its end, and the upper and lower surfaces of the U-shaped plate have coaxial through holes. The telescopic rod of the hydraulic cylinder is positioned between the upper and lower surfaces of the U-shaped plate, and a pin passes through the through hole and the through hole to connect the U-shaped plate and the hydraulic cylinder.

[0011] Furthermore, the aforementioned also includes a cotter pin, the end of which has a pin hole, and the cotter pin is disposed in the pin hole.

[0012] Furthermore, the connection between the protruding end of the aforementioned tie rod and the U-shaped plate is either welding or bolting.

[0013] Furthermore, the aforementioned also includes support rods and support plates;

[0014] The bottom of the hydraulic cylinder is fixedly connected to the support plate, one end of the support rod is connected to the support plate, and the other end of the support rod rests against the component.

[0015] Furthermore, the aforementioned support plate is provided with multiple rod holes. The support rod includes a boss, a rod body section, and a threaded section. The boss and the threaded section are located at both ends of the rod body section, respectively. The diameter of the rod body section is larger than the diameter of the rod hole, and the diameter of the threaded section is smaller than the diameter of the rod hole. The threaded section is fixedly connected to the rod hole by a nut.

[0016] Furthermore, the aforementioned rod holes are distributed circumferentially along the central axis of the support plate.

[0017] Furthermore, the aforementioned also includes a pad, which is connected to the boss of the support rod. The pad has a boss hole that matches the boss, and the support rod rests against the component through the pad.

[0018] The beneficial effects achieved by this invention are as follows:

[0019] 1. Utilizing a waist-shaped hole baffle, the structure is simpler and stronger than conventional pull claws; during use, it can penetrate deep into the bearing hole without contacting the bearing seat, thus avoiding damage to the bearing seat; moreover, for bearings with different shaft diameters, only the waist-shaped hole baffle needs to be replaced, making it more economical and versatile.

[0020] 2. This device is equipped with a hydraulic cylinder to remove the bearing, which is more convenient and faster. Compared with conventional electric saw cutting and fire heating methods, it is safer, avoids damage to the bearing seat, and does not affect subsequent use. Attached Figure Description

[0021] Figure 1 This is an initial state diagram of the overall structure of the present invention;

[0022] Figure 2 This is a diagram showing the state of the bearing after it has been removed in this invention.

[0023] Figure 3 This is a cross-sectional view of the overall structure of the present invention in its working state;

[0024] Figure 4 This is a schematic diagram of the working state of the stop and the pull rod in the present invention;

[0025] Figure 5 This is a schematic diagram of the installation of the stop block and pull rod in the adjusted state of the present invention;

[0026] Figure 6 This is a schematic diagram of the pad of the present invention;

[0027] Figure 7 This is a schematic diagram of the support rod of the present invention;

[0028] Figure 8 This is a schematic diagram of the support plate of the present invention.

[0029] The meanings of the reference numerals in the diagram are as follows: 1-stop; 11-waist-shaped hole; 12-positioning hole; 2-pad; 21-boss hole; 3-pull rod; 4-U-shaped plate; 5-cylinder; 6-support rod; 61-boss; 62-rod section; 63-threaded section; 7-support plate; 71-rod hole; 8-nut; 9-pin; 10-cotter pin. Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments and specific features in the embodiments are detailed descriptions of the technical solution of the present application, rather than limitations thereof. In the absence of conflict, the embodiments and technical features in the embodiments can be combined with each other.

[0031] This embodiment discloses a bearing disassembly device, such as... Figure 3 As shown, it includes a stop block 1, a pad 2, a pull rod 3, a U-shaped plate 4, a hydraulic cylinder 5, a support rod 6, a support plate 7, a nut 8, a pin 9, and a cotter pin 10.

[0032] The telescopic rod of the hydraulic cylinder 5 has a through hole at its end. The upper and lower surfaces of the U-shaped plate 4 have coaxial through holes. The telescopic rod of the hydraulic cylinder 5 is positioned between the upper and lower surfaces of the U-shaped plate 4. The pin 9 passes through the through hole and the through hole to connect the U-shaped plate 4 and the hydraulic cylinder 5. The end of the pin 9 also has a pin hole. The cotter pin 10 is inserted into the pin hole to limit the pin 9. The bottom of the hydraulic cylinder 5 is fixedly connected to the support plate 7.

[0033] Figure 8 As shown, the support plate 7 is provided with a plurality of rod holes 71 at intervals; Figure 7 As shown, the support rod 6 includes a boss 61, a rod body section 62, and a threaded section 63. The boss 61 and the threaded section 63 are located at both ends of the rod body section 62, respectively. The diameter of the rod body section 62 is larger than the diameter of the rod hole 71, and the diameter of the threaded section 63 is smaller than the diameter of the rod hole 71. The threaded section 63 passes through the rod hole 71 and is fixedly connected to the support plate 7 by a nut 8.

[0034] Figure 6 As shown, the pad 2 is provided with a boss hole 21 that matches the boss 61. When in use, the pad 2 is pressed against the part to be disassembled to counteract the reaction force generated when the hydraulic cylinder pulls the bearing.

[0035] Figure 5 As shown, the stop block 1 is provided with a positioning hole 12 and an oblong hole 11. The positioning hole 12 is located at the center of the stop block 1, and the oblong hole 11 and the positioning hole 12 are connected. When the pull rod 3 is located in the oblong hole 11, the stop block 1 can be tilted through the bearing inner hole while ensuring that the pull rod 3 is horizontal, thereby clamping the bearing inside the bearing seat and facilitating the disassembly of individual bearings located inside the components. This state is as follows: Figure 4 As shown; under normal working conditions, such as Figure 3 As shown, the stop block 1 is located at the end of the bearing for bearing positioning, and the pull rod 3 is located in the positioning hole 12 and is coaxial with the bearing center; the end of the pull rod 3 can be directly welded to the U-shaped plate 4 or can be connected by bolts.

[0036] The operation process of this device is briefly described as follows:

[0037] 1. Adjustment state: The stop block 1 is tilted into the bearing inner hole, and the pull rod 3 passes horizontally through the oblong hole 11 on the stop block 1. This state is as follows: Figure 4 As shown.

[0038] 2. Working state: After the stop block 1 passes through the inner hole of the bearing, the stop block 1 automatically droops down and fits tightly against the bearing end face. The pull rod 3 slides down to the positioning hole 12 on the stop block 1. This state is as follows: Figure 3 As shown.

[0039] 3. Removal State: The hydraulic cylinder 5 retracts, pulling the lever 3 via the pin 9 and U-shaped plate 4. During this process, the support rod 6 bears the relative displacement generated by the hydraulic cylinder. This state is as follows: Figure 2 As shown.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bearing disassembly device, characterized in that, The system includes a stop block (1), a pull rod (3), and a hydraulic cylinder (5). The stop block (1) is also provided with a positioning hole (12) and a waist-shaped hole (11). The positioning hole (12) is located at the center of the stop block (1). The waist-shaped hole (11) and the positioning hole (12) are both through holes and are connected. When the stop block (1) is in the working state, the stop block (1) is in contact with the bearing end face. The pull rod (3) is horizontally inserted in the positioning hole (12), and the end of the pull rod (3) is connected to the hydraulic cylinder (5). When the stop block (1) is in the adjustment state, the stop block (1) is inclined and inserted into the bearing inner hole. The pull rod (3) is horizontally inserted in the waist-shaped hole (11), and the end of the pull rod (3) is connected to the hydraulic cylinder (5).

2. The bearing disassembly device according to claim 1, characterized in that, It also includes a U-shaped plate (4) and a pin (9); the U-shaped plate (4) is connected to the through end of the pull rod (3); the telescopic rod end of the cylinder (5) is provided with a through hole, the upper and lower surfaces of the U-shaped plate (4) are provided with coaxial through holes, the telescopic rod end of the cylinder (5) is located between the upper and lower surfaces of the U-shaped plate (4), and the pin (9) passes through the through hole and the through hole to connect the U-shaped plate (4) and the cylinder (5).

3. The bearing disassembly device according to claim 2, characterized in that, It also includes a cotter pin (10), the end of which is provided with a pin hole, and the cotter pin (10) is disposed in the pin hole.

4. A bearing disassembly device according to claim 2, characterized in that, The connection between the protruding end of the tie rod (3) and the U-shaped plate (4) is by welding or bolting.

5. A bearing disassembly device according to claim 1, characterized in that, It also includes a support rod (6) and a support plate (7); the bottom of the cylinder (5) is fixedly connected to the support plate (7), one end of the support rod (6) is connected to the support plate (7), and the other end of the support rod (6) abuts against the component.

6. A bearing disassembly device according to claim 5, characterized in that, The support plate (7) is provided with a plurality of rod holes (71). The support rod (6) includes a boss (61), a rod body section (62) and a threaded section (63). The boss (61) and the threaded section (63) are located at both ends of the rod body section (62). The diameter of the rod body section (62) is larger than the diameter of the rod hole (71), and the diameter of the threaded section (63) is smaller than the diameter of the rod hole (71). The threaded section (63) is fixedly connected to the rod hole (71) by a nut (8).

7. A bearing disassembly device according to claim 6, characterized in that, The rod holes (71) are distributed circumferentially along the central axis of the support plate (7).

8. A bearing disassembly device according to claim 6, characterized in that, It also includes a pad (2), which is connected to the boss (61) of the support rod (6). The pad (2) has a boss hole (21) that matches the boss (61). The support rod (6) rests against the component through the pad (2).

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