Sealing mechanism and hydraulic expansion sleeve

Abstract

The utility model relates to the technical field of hydraulic expansion sleeves, in particular to a sealing mechanism and a hydraulic expansion sleeve. A limiting hole is formed in the sealing mechanism main body; a threaded rod is arranged on the push rod; the hydraulic expansion sleeve has the beneficial effects that the pressing plate and the upper sealing gaskets are fixed to the sealing mechanism body through the fastening nuts, the sealing mechanism body moves into the oil port, when two upper sealing gaskets move into the oil port, a closed cavity is formed between the two upper sealing gaskets, hydraulic oil in the hydraulic expansion sleeve body can be effectively prevented from flowing out, and the sealing effect is good. While having good sealing performance, the device is simple in structure, convenient for personnel to mount and dismount the upper sealing gasket, simple to operate, low in use cost, convenient for later maintenance of workers and high in practicability, and a new hydraulic expansion sleeve main body does not need to be replaced.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic expansion sleeves, in particular to a sealing mechanism and a hydraulic expansion sleeve. Background Art

[0002] A hydraulic expansion sleeve is a tool or device that utilizes hydraulic principles for mechanical assembly. It is commonly used when installing components such as bearings and sleeves, expanding the sleeve or tube to a predetermined diameter through hydraulic pressure to achieve a secure connection. This assembly method ensures high precision and reliability and is often used in assembly processes requiring high torque or a precise fit.

[0003] In the prior art, in order to prevent leakage of hydraulic oil in the hydraulic expansion sleeve, a sealing mechanism is required to improve the sealing performance of the device.

[0004] However, the sealing mechanism of the existing hydraulic expansion sleeve is usually fixed to the pressure bolt on the hydraulic expansion sleeve. When the sealing mechanism is damaged, it is difficult for the staff to repair it. The entire hydraulic expansion sleeve needs to be disassembled and replaced with a new one. The operation is complicated, the use cost is high, and it is not convenient for the staff to maintain it later, which has low practicality. Utility Model Content

[0005] The purpose of the present utility model is to provide a sealing mechanism and a hydraulic expansion sleeve to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a sealing mechanism, comprising: a hydraulic expansion sleeve body, the hydraulic expansion sleeve body being provided with an oil port;

[0007] The sealing mechanism body has a limit hole formed on it, and is provided with an upper sealing gasket, a limit rod, a fastening nut and a pressure plate;

[0008] A push rod is provided with a threaded rod and a piston.

[0009] Preferably, the limiting rod is a cylindrical structure, the limiting rod is fixedly connected to the pressure plate, the limiting rod can pass through the connecting hole opened on the upper sealing gasket and be inserted into the limiting hole, and the limiting hole is a circular groove structure.

[0010] Preferably, the pressing plate is in a semicircular plate-like structure, and a limiting rod is fixedly connected to the pressing plate. The limiting rod can be inserted into a connecting hole provided on the upper sealing gasket, and the connecting hole is in a circular groove-like structure.

[0011] Preferably, the upper sealing gasket is a semicircular plate structure, and a positioning block is fixedly connected to the upper sealing gasket, and the positioning block is a square plate structure. The positioning block can be inserted into a positioning groove opened on the sealing mechanism body, and the positioning groove is a square groove structure.

[0012] Preferably, the fastening nut is threadedly connected to the sealing mechanism body, the sealing mechanism body is fixedly connected to one end of the threaded rod, the threaded rod is fixedly connected to the push rod, the threaded rod is threadedly connected to the hydraulic expansion sleeve body, and the sealing mechanism body fixedly connected to the threaded rod is stuck in the oil port opened on the hydraulic expansion sleeve body.

[0013] Preferably, the piston is fixedly connected to one end of the push rod, a groove is provided on the side of the push rod, the groove is an annular groove structure, an expansion pad is provided in the groove, and the expansion pad is fixedly connected to the push rod.

[0014] A hydraulic expansion sleeve comprises the above-mentioned sealing mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] When the cam is in the closed position, the cam is in the closed position, and the cam is in the closed position, so that the cam is in the closed position and the cam is in the closed position, thereby preventing the cam from leaking out of the cam body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a partial structural diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the utility model;

[0020] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0021] Figure 5 for Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 6 for Figure 3 The enlarged structural diagram at C in the middle;

[0023] Figure 7 It is a schematic diagram of the local structure of the utility model.

[0024] In the figure: 1. Hydraulic expansion sleeve body; 2. Sealing mechanism body; 3. Oil port; 4. Threaded rod; 5. Push rod; 6. Slot; 7. Expansion pad; 8. Piston; 9. Positioning groove; 10. Limiting hole; 11. Positioning block; 12. Upper sealing pad; 13. Limiting rod; 14. Pressure plate; 15. Connecting hole; 16. Fastening nut. DETAILED DESCRIPTION

[0025] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-Figure 7 The utility model provides a technical solution: a sealing mechanism, the sealing mechanism comprising: a hydraulic expansion sleeve body 1, the hydraulic expansion sleeve body 1 is provided with an oil port 3; a sealing mechanism body 2, the sealing mechanism body 2 is provided with a limit hole 10, the sealing mechanism body 2 is provided with an upper sealing gasket 12, a limit rod 13, a fastening nut 16 and a pressure plate 14; a push rod 5, the push rod 5 is provided with a threaded rod 4 and a piston 8, a hydraulic expansion sleeve, including the sealing mechanism;

[0028] During specific use, the staff twists the sealing mechanism body 2 to make the threaded rod 4 rotate along the threaded hole on the hydraulic expansion sleeve body 1, so that the sealing mechanism body 2 moves into the oil port 3, and the oil port 3 is blocked by the sealing mechanism body 2 to prevent the hydraulic oil in the hydraulic expansion sleeve body 1 from flowing out.

[0029] Example 2

[0030] On the basis of embodiment 1, in order to facilitate the later maintenance of the staff, a fastening nut 16 is provided, the fastening nut 16 is threadedly connected to the sealing mechanism main body 2, the sealing mechanism main body 2 is fixedly connected to one end of the threaded rod 4, the threaded rod 4 is fixedly connected to the push rod 5, the threaded rod 4 is threadedly connected to the hydraulic expansion sleeve main body 1, and the sealing mechanism main body 2 fixedly connected on the threaded rod 4 is stuck in the oil port 3 opened on the hydraulic expansion sleeve main body 1. The staff twists the fastening nut 16 to rotate the fastening nut 16 along the thread opened on the sealing mechanism main body 2, so that one end of the fastening nut 16 is away from the pressure plate 14. The pressure plate 14 has a semicircular ring plate structure, and the pressure plate 14 is fixedly connected to the limiting rod 13. The limiting rod 13 can be stuck in the connecting hole 15 opened on the upper sealing gasket 12. The connecting hole 15 has a circular groove structure. The locking of the fastening nut 16 on the pressure plate 14 is released, and the staff can pull the pressure plate 14;

[0031] The limiting rod 13 is a cylindrical structure, and the limiting rod 13 is fixedly connected to the pressure plate 14. The limiting rod 13 can pass through the connecting hole 15 opened on the upper sealing gasket 12 and be inserted into the limiting hole 10. The limiting hole 10 is a circular groove structure, so that the limiting rod 13 fixedly connected to the pressure plate 14 is separated from the connecting hole 15 opened on the upper sealing gasket 12 and the limiting hole 10 opened on the sealing mechanism body 2. The pressure plate 14 is removed, and the upper sealing gasket 12 is a semicircular plate structure. A positioning block 11 is fixedly connected to the upper sealing gasket 12, and the positioning block 11 is a square plate structure. The block 11 can be stuck into the positioning groove 9 opened on the sealing mechanism main body 2. The positioning groove 9 is a square groove structure. The staff can take out the upper sealing gasket 12 and the positioning block 11 along the positioning groove 9 opened on the sealing mechanism main body 2. After taking out the upper sealing gasket 12, the staff can install a new upper sealing gasket 12 on the sealing mechanism main body 2 to improve the sealing performance of the device. The structure is simple, which is convenient for the staff to disassemble and replace the upper sealing gasket 12 of the sealing mechanism main body 2, and is convenient for the staff to perform later maintenance of the device, and is highly practical.

[0032] Example 3

[0033] On the basis of Example 2, a piston 8 is provided to improve the use effect of the device. The piston 8 is fixedly connected to one end of the push rod 5. A groove 6 is provided on the side of the push rod 5. The groove 6 is an annular groove structure. An expansion pad 7 is provided in the groove 6. The expansion pad 7 is fixedly connected to the push rod 5. The push rod 5 is fixedly connected with the piston 8. The expansion pad 7 fixedly connected in the groove 6 opened on the push rod 5 can be in close contact with the inner wall of the oil port 3, thereby improving the sealing of the device and preventing the hydraulic oil in the hydraulic expansion sleeve body 1 from flowing out.

[0034] In actual use, align the positioning block 11 fixedly connected on the upper sealing gasket 12 with the positioning groove 9 opened on the sealing mechanism main body 2 for installation. At this time, the connecting hole 15 opened on the upper sealing gasket 12 is just flush with the limiting hole 10 opened on the sealing mechanism main body 2. Align the limiting rod 13 fixedly connected on the pressure plate 14 with the connecting hole 15 and snap it into place. Press the pressure plate 14 to make the limiting rod 13 snap into the limiting hole 10. Rotate the fastening nut 16 to make it rotate along the thread on the sealing mechanism main body 2 so that the fastening nut 16 contacts and squeezes the pressure plate 14. The pressure plate 14 and the upper sealing gasket are tightened by the fastening nut 16. The sealing gasket 12 is fixed on the sealing mechanism main body 2. The sealing mechanism main body 2 is rotated to rotate the threaded rod 4 along the threaded hole on the hydraulic expansion sleeve main body 1, so that the sealing mechanism main body 2 moves into the oil port 3. When two upper sealing gaskets 12 move into the oil port 3, a closed cavity is formed between the two upper sealing gaskets 12, which can effectively prevent the hydraulic oil in the hydraulic expansion sleeve main body 1 from flowing out. While having good sealing performance, the device has a simple structure, which is convenient for staff to install and remove the upper sealing gaskets 12, facilitates staff to maintain in the future, improves the reliability of the device, and is highly practical.

[0035] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing mechanism, characterized in that: The sealing mechanism comprises: a hydraulic expansion sleeve body (1), and an oil port (3) is provided on the hydraulic expansion sleeve body (1); A sealing mechanism body (2), a limiting hole (10) is provided on the sealing mechanism body (2), an upper sealing gasket (12), a limiting rod (13), a fastening nut (16) and a pressure plate (14) are provided on the sealing mechanism body (2), the limiting rod (13) is a cylindrical structure, the limiting rod (13) is fixedly connected to the pressure plate (14), the limiting rod (13) can pass through the connecting hole (15) provided on the upper sealing gasket (12) and be inserted into the limiting hole (10), and the limiting hole (10) is a circular groove structure; A push rod (5) is provided with a threaded rod (4) and a piston (8), the piston (8) is fixedly connected to one end of the push rod (5), a slot (6) is provided on the side of the push rod (5), the slot (6) is an annular slot structure, an expansion pad (7) is provided in the slot (6), and the expansion pad (7) is fixedly connected to the push rod (5).

2. A sealing mechanism according to claim 1, characterized in that: The pressing plate (14) is in the form of a semicircular plate. A limiting rod (13) is fixedly connected to the pressing plate (14). The limiting rod (13) can be inserted into a connecting hole (15) provided on the upper sealing gasket (12). The connecting hole (15) is in the form of a circular groove.

3. The sealing mechanism according to claim 1, characterized in that: The upper sealing gasket (12) is in the form of a semicircular plate. A positioning block (11) is fixedly connected to the upper sealing gasket (12). The positioning block (11) is in the form of a square plate. The positioning block (11) can be inserted into a positioning groove (9) provided on the sealing mechanism body (2). The positioning groove (9) is in the form of a square groove.

4. A sealing mechanism according to claim 1, characterized in that: The fastening nut (16) is threadedly connected to the sealing mechanism body (2), the sealing mechanism body (2) is fixedly connected to one end of the threaded rod (4), the threaded rod (4) is fixedly connected to the push rod (5), the threaded rod (4) is threadedly connected to the hydraulic expansion sleeve body (1), and the sealing mechanism body (2) fixedly connected to the threaded rod (4) is stuck in the oil port (3) opened on the hydraulic expansion sleeve body (1).

5. A hydraulic expansion sleeve, characterized by: The invention comprises the sealing mechanism described in any one of claims 1 to 4 above.

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