A transmission housing main shaft bearing extraction device

Abstract

This utility model discloses a device for removing the main shaft bearing of a transmission housing, including a fixedly connected base and a frame. The base has a separation hole, and a hydraulic cylinder is fixedly mounted on the frame. A pusher frame is fixedly connected to the piston rod of the hydraulic cylinder, and a push rod is fixedly connected to the bottom of the pusher frame. Two movable pads are also provided on the base, and the two movable pads are moved away from or towards each other via a drive mechanism. This utility model uses a hydraulic system to control the hydraulic cylinder to push the push rod and push the input shaft, achieving the separation operation of the main housing from the bearing on the input shaft. It has the advantages of strong operability, simplicity, time and labor saving, and can improve work efficiency, reduce damage to spare parts caused by disassembly, and reduce maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of bearing disassembly technology, and in particular to a device for removing the main shaft bearing of a transmission housing. Background Technology

[0002] With the increasing application and popularity of pure electric mining dump trucks in mines, the number of these trucks in operation has also increased. These trucks often use an AMT two-speed transmission, which consists of an input shaft and planetary gears. This transmission is simple in structure and reliable in operation. However, during major overhauls of the transmission, because the input shaft, planetary gears, and main housing use an interference fit, disassembling the input shaft or planetary gears requires separating the input shaft from the main housing. A set of bearings is used to connect the input shaft and main housing, but due to the large interference fit, disassembly is difficult, affecting maintenance efficiency and easily causing damage to components during disassembly, thus increasing maintenance costs.

[0003] The existing method can only use tapping when encountering this problem. However, this method not only consumes a lot of time and manpower in daily operation, but also easily damages the parts during disassembly, which seriously restricts the maintenance cost and efficiency. Therefore, it is necessary to design a convenient and reliable disassembly device to meet the maintenance needs. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a device for removing the main shaft bearing of a transmission housing, thereby solving the problems of time-consuming and labor-intensive methods that rely on hammering for disassembly, and the potential damage to components during the disassembly process.

[0005] This utility model is implemented as follows: A device for removing a main shaft bearing from a transmission housing includes a fixedly connected base and a frame. The base has a separation hole, and a hydraulic cylinder is fixedly mounted on the frame. The piston rod of the hydraulic cylinder is fixedly connected to a pusher, and a push rod is fixedly connected to the bottom of the pusher. The base also has two movable pads, which are driven by a drive mechanism to move away from or towards each other.

[0006] Furthermore, it also includes a hydraulic system, which is connected to the hydraulic cylinder via pipelines.

[0007] Furthermore, vertical sliding grooves are provided on both sides of the frame, and the two ends of the pusher are inserted into the vertical sliding grooves, and the pusher slides up and down along the vertical sliding grooves.

[0008] Furthermore, two springs are provided between the pusher and the frame, with the two springs located on both sides of the hydraulic cylinder. One end of each spring is fixedly connected to the top wall of the frame, and the other end is fixedly connected to the top of the pusher.

[0009] Furthermore, the two movable pads include a first movable pad and a second movable pad disposed opposite to each other on both sides of the separation hole.

[0010] Furthermore, the driving mechanism includes a push-pull cylinder, the movable end of which is fixedly connected to one side of the first movable pad.

[0011] Furthermore, the drive mechanism also includes two push-pull components, which are symmetrically arranged on both sides of the push-pull cylinder.

[0012] Furthermore, the push-pull assembly includes a gear rotatably mounted on the top of the base. A first rack and a second rack are meshed on both sides of the gear. Two first slide rods are fixedly connected to both ends of the first rack, and two second slide rods are fixedly connected to both ends of the second rack. One of the first slide rods is fixedly connected to the first movable pad, and one of the second slide rods passes through the first movable pad and is fixedly connected to the second movable pad.

[0013] Furthermore, the top of the base is also provided with multiple fixed slides, and the first slide rod and the second slide rod are respectively inserted into the corresponding fixed slides.

[0014] Furthermore, the base is also provided with a protective cover, which covers the drive mechanism.

[0015] The beneficial effects of this utility model are: This utility model discloses a transmission housing main shaft bearing removal device. A hydraulic system controls a hydraulic cylinder to push a push rod against the input shaft, achieving separation of the main housing from the bearing on the input shaft. This device is highly operable, simple, time-saving, and labor-saving, improving work efficiency, reducing damage to spare parts caused by disassembly, and lowering maintenance costs. A drive mechanism moves two movable pads closer together or further apart, adjusting the distance between them. This device is suitable for clamping and securing main housings of different transmission specifications, featuring a simple and convenient structure with high versatility. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention from another angle; Figure 3This is a three-dimensional structural diagram of the assembled base and drive mechanism of this utility model; Figure 4 This is a top view of the assembled base and drive mechanism of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Base; 101. Separation hole; 2. Frame; 21. Vertical slide groove; 3. Hydraulic cylinder; 4. Push frame; 5. Push rod; 6. Drive mechanism; 61. Push-pull cylinder; 62. Push-pull assembly; 621. Gear; 622. First rack; 623. Second rack; 624. First slide rod; 625. Second slide rod; 626. Fixed slide block; 7. Hydraulic system; 8. Piping; 9. Spring; 10. First moving pad; 11. Second moving pad; 12. Protective cover. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figure 1 and Figure 2 The present invention relates to a gearbox housing main shaft bearing removal device, comprising a fixedly connected base 1 and a frame 2. The base 1 has a separation hole 101. A hydraulic cylinder 3 is fixedly mounted on the frame 2. The piston rod of the hydraulic cylinder 3 is fixedly connected to a pusher 4. A pusher rod 5 is fixedly connected to the bottom of the pusher 4. The base 1 is also provided with two movable pads, which are moved away from or close to each other by a drive mechanism 6.

[0020] The base 1 and the frame 2 constitute the main body of the entire device, ensuring its reliability and strength. Sufficient space is reserved below the base 1 for disassembling the input shaft and planetary gear assembly, ensuring a smooth disassembly process. A separation hole 101 is provided on the base 1 to ensure that the planetary gear carrier assembly on the input shaft can smoothly detach into the reserved space below the base 1 during disassembly, achieving perfect separation.

[0021] A hydraulic cylinder 3 is fixedly mounted on the frame 2. The hydraulic cylinder 3 is vertically positioned, and its top is fixedly connected to the top wall of the frame 2. A hydraulic system 7 is also included, which is connected to the hydraulic cylinder 3 via a pipeline 8. The hydraulic system 7 consists of a hydraulic pump (not shown in the figure), hydraulic valves (not shown in the figure), the hydraulic cylinder 3, and an oil tank (not shown in the figure). The hydraulic pump is the power source, used to convert mechanical energy into hydraulic energy, providing high-pressure oil to the system; the hydraulic valves are used to control the flow direction, pressure, and flow rate of the hydraulic oil; the hydraulic cylinder 3 is the actuator, converting hydraulic energy into mechanical energy to drive the piston rod, achieving pressure pushing of the workpiece. The hydraulic system 7 is prior art, and the connections between the various hydraulic components and the methods of connection can be designed by those skilled in the art as needed, and are not within the protection scope of this utility model, and will not be elaborated further here.

[0022] Vertical grooves 21 are provided on both sides of the frame 2. The two ends of the pusher frame 4 pass through the vertical grooves 21, and the pusher frame 4 slides up and down along the vertical grooves 21. The vertical grooves 21 serve as guides to ensure that the pusher frame 4 slides up and down vertically. Two springs 9 are provided between the pusher frame 4 and the frame 2. The two springs 9 are located on both sides of the hydraulic cylinder 3. One end of the spring 9 is fixedly connected to the top wall of the frame 2, and the other end is fixedly connected to the top of the pusher frame 4. The springs 9 are designed to assist the piston rod in moving upward when the hydraulic cylinder 3 returns to its original position after completing the pushing operation, thereby accelerating the piston rod's reset speed. At the same time, they play a certain buffering role during equipment operation, reducing impact damage to the equipment and extending its service life.

[0023] like Figure 3 and Figure 4As shown, the base 1 is also equipped with two movable pads, which are moved away from or close to each other via a drive mechanism 6. The movable pads are used to fix the main housing to the device, preventing movement during operation from affecting normal work or causing safety risks. The two movable pads include a first movable pad 10 and a second movable pad 11, which are positioned opposite each other on both sides of the separation hole 101. The drive mechanism 6 includes a push-pull cylinder 61, the movable end of which is fixedly connected to one side of the first movable pad 10. The drive mechanism 6 also includes two push-pull assemblies 62, symmetrically arranged on both sides of the push-pull cylinder 61. The symmetrical arrangement of the two push-pull assemblies 62 ensures force balance when pushing or pulling the two movable pads, resulting in better stability. The push-pull assembly 62 includes a gear 621 rotatably mounted on the top of the base 1. A first rack 622 and a second rack 623 are meshed on both sides of the gear 621. Two first slide rods 624 are fixedly connected to both ends of the first rack 622, and two second slide rods 625 are fixedly connected to both ends of the second rack 623. One of the first slide rods 624 is fixedly connected to a first movable pad 10, and one of the second slide rods 625 passes through the first movable pad 10 and is fixedly connected to a second movable pad 11. The top of the base 1 also has multiple fixed slide blocks 626. The first slide rods 624 and second slide rods 625 are respectively inserted into their corresponding fixed slide blocks 626. The fixed slide blocks 626 serve as guides, ensuring that the first slide rods 624 and second slide rods 625 move horizontally.

[0024] In use, the distance between the two movable pads is adjusted according to the size of the main housing. Specifically, when the push-pull cylinder 61 extends, it pushes the first movable pad 10, which is fixedly connected to it, to move closer to the center of the separation hole 101. During the movement of the first movable pad 10, it drives the two first slide rods 624, which are fixedly connected to it, to move. During the movement of the first slide rods 624, it drives the first rack 622 to move. The movement of the first rack 622 drives the gear 621 meshing with it to rotate. At the same time, the rotation of the gear 621 drives the second rack 623 to move. The movement of the second rack 623... The direction of movement of the second rack 623 is opposite to that of the first rack 622. During its movement, the second rack 623 drives the second slide bar 625 to move. The movement of the second slide bar 625 drives the second moving pad 11, which is fixedly connected to it, to move. The direction of movement of the second moving pad 11 is opposite to that of the first moving pad 10, but it also moves closer to the center of the separation hole 101, thereby reducing the distance between the first moving pad 10 and the second moving pad 11 to accommodate the placement of the main housing with a smaller diameter. After the main housing is placed on top of the first moving pad 10 and the second moving pad 11, it is fixedly connected by bolts. Similarly, if the size of the main housing is large, the push-pull cylinder 61 can be retracted. The specific working process is the reverse of the above process and will not be described in detail here. The setting of two moving pads is suitable for clamping and fastening the main housing on different specifications of transmissions, and is also suitable for disassembling different specifications of transmissions. The structure is simple, convenient, and highly versatile.

[0025] like Figure 1 As shown, a protective cover 12 is also provided on the base 1. The protective cover 12 is placed above the drive mechanism 6 to prevent dust and other debris from falling in.

[0026] When using the transmission housing main shaft bearing removal device of this utility model, firstly, the distance between the two moving pads is adjusted according to the size of the main housing. That is, the two moving pads are brought closer or further apart by the extension and retraction of the push-pull cylinder 61 and the cooperation of the push-pull assembly 62 to adapt to the clamping and fastening of the main housing of different specifications of transmissions. Secondly, the piston rod of the hydraulic cylinder 3 extends, driving the pusher 4 and the push rod 5 to move downward until the push rod 5 hits the input shaft. Then, the two hooks hook the inside of the bearing, so that it can be smoothly released under the pressure of the hydraulic cylinder 3. The disassembly efficiency and success rate are greatly improved.

[0027] While this utility model discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of this utility model. Anyone skilled in the art should know that any easily conceivable variations or modifications are possible under the technical spirit of this utility model and are covered by the patent claims of this utility model.

Claims

1. A transmission housing mainshaft bearing extractor, characterized by, The device includes a fixedly connected base (1) and frame (2). The base (1) has a separation hole (101). The frame (2) is fixedly equipped with a hydraulic cylinder (3). The piston rod of the hydraulic cylinder (3) is fixedly connected to a pusher (4). The bottom of the pusher (4) is fixedly connected to a push rod (5). The base (1) is also equipped with two movable pads. The two movable pads are moved away from each other or close to each other by a drive mechanism (6).

2. The transmission housing main shaft bearing removal device according to claim 1, characterized in that, It also includes a hydraulic system (7), which is connected to the hydraulic cylinder (3) via a pipeline (8).

3. The transmission housing main shaft bearing removal device according to claim 1, characterized in that, The frame (2) has vertical sliding grooves (21) on both sides, and the two ends of the pusher (4) pass through the vertical sliding grooves (21). The pusher (4) slides up and down along the vertical sliding grooves (21).

4. The transmission case mainshaft bearing extractor of claim 3, wherein, Two springs (9) are provided between the pusher (4) and the frame (2). The two springs (9) are located on both sides of the hydraulic cylinder (3). One end of the spring (9) is fixedly connected to the top wall of the frame (2), and the other end is fixedly connected to the top of the pusher (4).

5. The transmission housing main shaft bearing removal device according to claim 1, characterized in that, The two movable pads include a first movable pad (10) and a second movable pad (11) disposed opposite each other on both sides of the separation hole (101).

6. The transmission case mainshaft bearing extractor of claim 5, wherein, The drive mechanism (6) includes a push-pull cylinder (61), the movable end of which is fixedly connected to one side of the first movable pad (10).

7. The transmission case mainshaft bearing extractor of claim 6, wherein, The drive mechanism (6) also includes a push-pull assembly (62), and there are two push-pull assemblies (62), which are symmetrically arranged on both sides of the push-pull cylinder (61).

8. The transmission housing main shaft bearing removal device according to claim 7, characterized in that, The push-pull assembly (62) includes a gear (621) rotatably mounted on the top of the base (1). A first rack (622) and a second rack (623) are meshed on both sides of the gear (621). Two first slide rods (624) are fixedly connected to both ends of the first rack (622), and two second slide rods (625) are fixedly connected to both ends of the second rack (623). One of the first slide rods (624) is fixedly connected to the first movable pad (10), and one of the second slide rods (625) passes through the first movable pad (10) and is fixedly connected to the second movable pad (11).

9. The transmission housing main shaft bearing removal device according to claim 8, characterized in that, The top of the base (1) is also provided with a plurality of fixed slides (626), and the first slide rod (624) and the second slide rod (625) are respectively inserted into the corresponding fixed slides (626).

10. The transmission housing main shaft bearing removal device according to claim 1, characterized in that, The base (1) is also provided with a protective cover (12), which covers the drive mechanism (6) above.

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