Modularized self-locking keyless coupling

Abstract

The utility model discloses a modularized self-locking keyless coupling, which relates to the technical field of mechanical transmission and comprises a coupling half body, a front end cover is detachably mounted at one end of the coupling half body, an inner ring is mounted at one end of the front end cover and positioned in the coupling half body, and mounting holes are distributed at the other end of the coupling half body. A rear end cover is detachably mounted in the mounting hole, one end of the inner ring makes contact with one end of the rear end cover, a pressing ring is mounted on the surface of the inner ring and located between the front end cover and the rear end cover in a sleeved mode, a mounting oil cavity is formed between the pressing ring and the rear end cover, and a dismounting oil cavity is formed between the pressing ring and the front end cover. Disassembly oil holes are distributed in the surfaces of the coupling half bodies. Hydraulic oil is injected into the mounting oil cavity through the mounting oil hole, the hydraulic oil pushes the pressing ring to move, the pressing ring tightly presses the coupler half bodies and the inner ring, the inner ring generates elastic deformation to transmit torque, screwing of a plurality of bolts is not needed, and the mounting and dismounting efficiency of the coupler is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission technology, specifically a modular self-locking keyless coupling. Background Technology

[0002] A coupling is a mechanical device used to connect two different shafts. It is primarily used to transmit rotational motion, torque, and power, while allowing axial displacement and angular deviation. Couplings can seamlessly connect to another shaft, enabling tight fit and coordinated operation between different components.

[0003] Currently, traditional couplings are divided into keyed couplings and keyless couplings;

[0004] Keyed connections have the following disadvantages: First, the coupling requires heating or pressure installation, and disassembly requires disassembly tools. Large couplings require pressure equipment for disassembly, which is very inconvenient and time-consuming. Second, the keyed connection design needs to consider the strength of the keyway, and "key rolling" may occur after long-term use. Third, opening a keyway on the shaft reduces the strength of the shaft.

[0005] Keyless couplings have the following disadvantages: First, conical couplings transmit torque by using the tightening force of high-strength bolts to move the half-coupling, creating an interference fit through elastic deformation. The disadvantage is that during installation, the movement of the coupling half affects installation accuracy or the need for pre-installed movement distance. Disassembly requires multiple bolts, resulting in longer installation and disassembly times and lower efficiency. Second, couplings with an oil reservoir inside the half-coupling use hydraulic oil to create an interference fit within the inner bore, transmitting torque. The disadvantage is that the coupling contains high-pressure oil, typically around 50 MPa, making it unsuitable for applications with high flame retardancy requirements. Leakage of high-pressure oil can also pose a safety hazard.

[0006] Meanwhile, all of the above couplings share a common drawback: when a part of the coupling is damaged, the entire coupling needs to be replaced, increasing the cost of use and making it impossible to replace a specific part. Utility Model Content

[0007] The purpose of this invention is to provide a modular self-locking keyless coupling to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a modular self-locking keyless coupling, comprising a coupling half, a front end cover detachably mounted on one end of the coupling half, an inner ring mounted on one end of the front end cover and inside the coupling half, an installation hole provided on the other end of the coupling half, a rear end cover detachably mounted inside the installation hole, one end of the inner ring contacting one end of the rear end cover, a pressure ring sleeved on the surface of the inner ring and between the front end cover and the rear end cover, an installation oil cavity formed between the pressure ring and the rear end cover, a disassembly oil cavity formed between the pressure ring and the front end cover, an installation oil hole provided on one end of the rear end cover, and a disassembly oil hole provided on the surface of the coupling half.

[0009] Preferably, a plurality of front bolts are installed on the surface of the front end cover, a front sealing ring is provided between the front end cover and the coupling half, the front bolts penetrate the front sealing ring and extend into the interior of the coupling half through the screw holes, a plurality of rear bolts are installed at one end of the rear end cover outside the oil hole through the through hole, a rear sealing ring is installed at the end of the rear end cover near the coupling half, and the rear bolts penetrate the rear sealing ring and extend into the interior of the coupling half through the screw holes.

[0010] Preferably, there are multiple mounting oil holes, which are connected to the mounting oil cavity, and anti-retraction bolts are installed inside the mounting oil holes.

[0011] Preferably, the disassembly oil hole and the disassembly oil chamber are connected.

[0012] Preferably, the inner circle of the front cover has rounded corners near the edge.

[0013] Preferably, the inner and outer surfaces of the pressure ring are in contact with the inner ring and the coupling half, respectively.

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

[0015] 1. This modular self-locking keyless coupling injects hydraulic oil into the mounting oil chamber through the mounting oil hole. The hydraulic oil pushes the pressure ring to move, and the pressure ring presses the coupling half and the inner ring, causing the inner ring to undergo elastic deformation and thus transmit torque. This effectively improves the installation and disassembly efficiency of the coupling. Moreover, there is no hydraulic oil inside the oil chamber during use, making it suitable for all working conditions.

[0016] 2. This modular self-locking keyless coupling, by partially modularizing each component, allows for the replacement of identical modular spare parts when a part of the coupling is damaged, provided the bore diameter is the same. This enables interoperability between different models of couplings, allowing for component replacement across different coupling models and effectively reducing replacement costs.

[0017] 3. This modular self-locking keyless coupling relies on the self-locking of the conical surface to transmit torque. The self-locking phenomenon is formed when the cone angle is smaller than the friction angle. The elastic deformation generated by the self-locking of the conical surface produces an interference fit to transmit torque. At the same time, the anti-loosening bolt can effectively prevent the pressure ring from loosening. Attached Figure Description

[0018] Figure 1 This is a front sectional view of the present invention;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This utility model Figure 1 Enlarged view of point B in the middle.

[0021] In the diagram: 1. Coupling half; 2. Front end cover; 3. Inner ring; 4. Mounting hole; 5. Rear end cover; 6. Pressure ring; 7. Mounting oil chamber; 8. Removal oil chamber; 9. Mounting oil hole; 10. Removal oil hole; 11. Front bolt; 12. Front sealing ring; 13. Rear bolt; 14. Rear sealing ring; 15. Anti-reverse bolt; 16. Rounded corner. Detailed Implementation

[0022] 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.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figures 1 to 3As shown, this embodiment of the modular self-locking keyless coupling includes a coupling half 1. A front end cover 2 is detachably mounted on one end of the coupling half 1. The front end cover 2 is removable. An inner ring 3 is installed inside the coupling half 1 at one end of the front end cover 2. A mounting hole 4 is provided at the other end of the coupling half 1. A rear end cover 5 is detachably mounted inside the mounting hole 4. One end of the inner ring 3 contacts one end of the rear end cover 5. The rear end cover 5 is removable, and both ends of the inner ring 3 contact the front end cover 2 and the rear end cover 5 respectively. The surface of the inner ring 3 is located between the front end cover 2 and the rear end cover. A pressure ring 6 is fitted between the coupling half 1 and the inner ring 2. The pressure ring 6 and the rear end cover 5 form an installation oil cavity 7, and the pressure ring 6 and the front end cover 2 form a disassembly oil cavity 8. An installation oil hole 9 is provided at one end of the rear end cover 5, and a disassembly oil hole 10 is provided on the surface of the coupling half 1. Hydraulic oil is injected into the installation oil cavity 7 through the installation oil hole 9. The hydraulic oil pushes the pressure ring 6 to move. The pressure ring 6 presses the coupling half 1 and the inner ring 3 together, causing elastic deformation and thus transmitting torque. Each disassembly oil hole 10 can be used individually. Only bolts are needed to plug the unused disassembly oil holes 10.

[0025] Specifically, several front bolts 11 are installed on the surface of the front cover 2. A front sealing ring 12 is between the front cover 2 and the coupling half 1. The front bolts 11 pass through the front sealing ring 12 and extend into the interior of the coupling half 1 through the screw holes. The front cover 2 can be disassembled by the front bolts 11. The front sealing ring 12 ensures the sealing between the front cover 2 and the coupling half 1. Several rear bolts 13 are installed at one end of the rear cover 5 outside the oil hole 9 through the through hole. A rear sealing ring 14 is installed at the end of the rear cover 5 near the coupling half 1. The rear bolts 13 pass through the rear sealing ring 14 and extend into the interior of the coupling half 1 through the screw holes. The rear cover 5 can be disassembled by the rear bolts 13. The rear sealing ring 14 plays a sealing role in the connection between the rear cover 5 and the coupling half 1.

[0026] Furthermore, there are multiple mounting oil holes 9, which are connected to the mounting oil cavity 7. The mounting oil hole 9 has an anti-retraction bolt 15 installed inside. By removing a certain anti-retraction bolt 15, hydraulic oil can be injected into the mounting oil cavity 7 through the mounting oil hole 9 through which the anti-retraction bolt 15 is removed. After the pressure ring 6 moves, the anti-retraction bolt 15 can be rotated to prevent the pressure ring 6 from loosening and coming out.

[0027] Furthermore, the disassembly oil hole 10 and the disassembly oil chamber 8 are connected. By injecting oil into the disassembly oil hole 10, hydraulic oil can enter the disassembly oil chamber 8.

[0028] Furthermore, the inner circle of the front cover 2 is provided with rounded corners 16 near the edge. The rounded corners 16 facilitate the insertion of the shaft to be connected into the inner wall of the inner ring 3.

[0029] Furthermore, the inner and outer surfaces of the pressure ring 6 contact the inner ring 3 and the coupling half 1, respectively. When the pressure ring 6 moves, it contacts the inner ring 3 and the coupling half 1, causing the inner ring 3 to undergo elastic deformation and thus transmit torque.

[0030] The usage method of this embodiment is as follows: First, place the two shafts to be connected into the inner ring 3 inside the coupling. At this time, the shaft and the inner ring 3 are in clearance fit. Then, remove the anti-retraction bolt 15 inside the mounting oil hole 9. Hydraulic oil is injected into the mounting oil chamber 7 through the mounting oil hole 9 where the anti-retraction bolt 15 was removed. The hydraulic oil is pressurized by a pressurizing device, which pushes the pressure ring 6 to move. The pressure ring 6 presses the coupling half 1 and the inner ring 3 together, causing the inner ring 3 to undergo elastic deformation and thus transmit torque. After the movement distance reaches the standard, remove the pressurizing device, and the hydraulic oil flows out from the mounting oil chamber 7. Then, tighten the anti-retraction bolt 15 to make it... The end face contacts the pressure ring 6 to prevent the pressure ring 6 from loosening and exiting during operation, thus affecting torque transmission. Since the cone angle of the pressure ring 6 is very small and is a self-locking angle, torque can be transmitted normally through self-locking. When disassembly is required, hydraulic oil is injected through the disassembly oil hole 10 to push the pressure ring 6 to move and reset. The elastic deformation between the inner ring 3 and the shaft returns to normal, and the clearance fit with the shaft is restored, allowing the coupling to be easily and smoothly disassembled. The inner ring 3, pressure ring 6, front cover 2, and rear cover 5 are all modularly designed and manufactured to ensure that different models of couplings can be used interchangeably as long as the mounting shaft hole is the same, reducing the cost of use.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A modular self-locking keyless coupling, comprising a coupling half (1), characterized in that: One end of the coupling half (1) is detachably fitted with a front end cover (2). An inner ring (3) is installed at one end of the front end cover (2) and inside the coupling half (1). The other end of the coupling half (1) is provided with a mounting hole (4). A rear end cover (5) is detachably installed inside the mounting hole (4). One end of the inner ring (3) is in contact with one end of the rear end cover (5). A pressure ring (6) is fitted on the surface of the inner ring (3) between the front end cover (2) and the rear end cover (5). An installation oil cavity (7) is formed between the pressure ring (6) and the rear end cover (5). A disassembly oil cavity (8) is formed between the pressure ring (6) and the front end cover (2). An installation oil hole (9) is provided at one end of the rear end cover (5). A disassembly oil hole (10) is provided on the surface of the coupling half (1).

2. The modular self-locking keyless coupling according to claim 1, characterized in that: Several front bolts (11) are installed on the surface of the front cover (2). There is a front sealing ring (12) between the front cover (2) and the coupling half (1). The front bolts (11) penetrate the front sealing ring (12) and extend into the interior of the coupling half (1) through the screw hole. Several rear bolts (13) are installed at one end of the rear cover (5) outside the oil hole (9) through the through hole. A rear sealing ring (14) is installed at the end of the rear cover (5) near the coupling half (1). The rear bolts (13) penetrate the rear sealing ring (14) and extend into the interior of the coupling half (1) through the screw hole.

3. The modular self-locking keyless coupling according to claim 1, characterized in that: The number of mounting oil holes (9) is multiple, and the mounting oil holes (9) are connected to the mounting oil cavity (7). The mounting oil holes (9) are threaded with anti-retraction bolts (15).

4. The modular self-locking keyless coupling according to claim 1, characterized in that: The disassembly oil hole (10) and the disassembly oil cavity (8) are connected.

5. The modular self-locking keyless coupling according to claim 1, characterized in that: The inner circle of the front cover (2) is provided with rounded corners (16) near the edge.

6. The modular self-locking keyless coupling according to claim 1, characterized in that: The inner and outer surfaces of the pressure ring (6) are in contact with the inner ring (3) and the coupling half (1), respectively.

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