A safety coupling

Abstract

This utility model relates to the field of safety couplings, specifically to a safety coupling, including a coupling sleeve, a main body for shaft connection, flanges fixedly disposed on both sides of the coupling sleeve for assembly, and each flange having an embedding groove on its exterior. A first embedding block is embedded inside each embedding groove, and a friction plate is fixedly installed on the exterior of the first embedding block. This utility model includes a first embedding block, friction plates, a second embedding block, a drive shaft, a clamping frame, a clamping airbag, internal anti-slip texture, and a pressure injection port. When both the drive and driven shaft sleeves are connected to the coupling sleeve, friction plates are inserted between the drive and driven shaft sleeves and the coupling sleeve to increase the friction area and thus transmit torque. After the drive shaft is inserted into the drive shaft sleeve, in addition to inserting a safety pin into the mating groove of the drive shaft to fix it, a clamping frame is also installed inside the drive shaft sleeve.

Description

Technical Field

[0001] This utility model relates to the field of safety couplings, and specifically to a safety coupling. Background Technology

[0002] A safety coupling is a safety protection device in a mechanical transmission system. Its core function is to protect the transmission system and critical equipment from damage when the equipment is overloaded by means of slippage, disconnection, or torque limitation. A safety coupling consists of a driving half-coupling, a driven half-coupling, a safety pin, and a shear sleeve. Under normal operation, the safety pin bears the set torque. Under overload, the safety pin breaks, the driving end spins freely, and the driven end stops, thus preventing damage to the transmission chain.

[0003] Existing safety couplings lack dual overload protection capabilities, leading to downtime and replacement after safety pin breakage during use. The broken surface can also damage the shaft, and axial movement during high-speed rotation can cause bearing wear, posing a risk of transmission chain breakage. Such safety couplings cannot adapt to various working conditions under long-term use, and require disassembly and inspection after overload, resulting in high overall maintenance costs.

[0004] Therefore, it is necessary to invent a safety coupling to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a safety coupling that, through a first insert block, friction plates, a second insert block, a drive shaft, a clamping frame, a clamping airbag, internal anti-slip grooves, and a pressure injection port, enables the safety coupling to have overload protection capabilities. Under mild overload, the friction plates slip, absorbing impact energy; under extreme overload, the safety pin breaks, and the clamping airbag releases pressure, achieving dual protection from flexible protection to hard disconnection, thereby increasing the safety of the safety coupling. This graded response mechanism reduces torque fluctuations caused by axial movement in the safety coupling, further ensuring its efficiency. This addresses the problems of existing safety couplings, which lack dual overload protection, leading to safety pin breakage requiring machine shutdown and replacement, damage to the shaft, and bearing wear and transmission chain breakage due to axial movement at high speeds. Such couplings are unsuitable for various operating conditions and require disassembly and inspection after overload, resulting in high overall maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety coupling, comprising a coupling sleeve and a main body for shaft connection;

[0007] Flanges are fixedly installed on both sides of the outer side of the coupling sleeve for assembly and splicing. Each flange has an embedding groove on its outer side. A first embedding block is embedded inside the embedding groove. A friction plate is fixedly installed on the outer side of the first embedding block. A second embedding block is fixedly installed on the other side of the outer side of the friction plate.

[0008] Double-ended bolts, both with threads passing through the outside of the flange, are used for threaded connection of the front end to the drive bushing, and the other side of the coupling sleeve is threaded to the driven bushing. The outer two sides of the drive bushing are fixedly installed with outer retaining rings, and the outer threads of the outer retaining rings are threaded through fastening bolts. The bottom end of the fastening bolts is threaded to a clamping bracket.

[0009] The clamping airbag is fixedly installed inside the clamping frame to compress the shaft body. The inside of the clamping airbag is provided with internal anti-slip texture, and the outside of the active shaft sleeve is provided with a pressure injection port.

[0010] Preferably, the first embedded block fixedly installed on the outside of the friction plate is engaged with the embedded groove opened on the outside of the flange, and the external dimensions of the first embedded block match the internal dimensions of the embedded groove.

[0011] Preferably, the drive bushing is threaded to the coupling sleeve, and the double-ended bolts are arranged in a ring array on the flange.

[0012] Preferably, a safety groove is provided on the outside of the drive shaft sleeve, and a safety pin is embedded inside the safety groove.

[0013] Preferably, the drive shaft sleeve is fitted with a drive shaft body inside, and the drive shaft body is provided with a matching groove on the outside, and the bottom end of the safety pin is used in conjunction with the matching groove.

[0014] Preferably, the number of the inner anti-slip patterns is set to multiple, and the multiple inner anti-slip patterns are distributed in a ring array on the airbag.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] This utility model includes a first embedded block, a friction plate, a second embedded block, a drive shaft, a clamping frame, a clamping airbag, inner anti-slip texture, and a pressure injection port. When both the drive and driven shaft sleeves are connected to the coupling sleeve, friction plates are inserted between the drive and driven shaft sleeves and the coupling sleeve to increase the friction area and thus transmit torque. After the drive shaft is inserted into the drive shaft sleeve, in addition to inserting a safety pin into the mating groove of the drive shaft to fix it, a clamping frame is installed inside the drive shaft sleeve. A certain amount of gas is injected through the pressure injection port to achieve internal clamping. The air bladder inflates, thus securing the drive shaft. Furthermore, the internal anti-slip texture of the air bladder further increases the friction with the drive shaft. This combination provides the safety coupling with overload protection. Under slight overload, the friction plates slip, absorbing impact energy. Under extreme overload, the safety pin breaks, and the air bladder releases pressure, achieving a dual protection from flexible to hard disconnection. This increases the safety of the safety coupling. This graded response mechanism reduces torque fluctuations caused by axial movement, further ensuring the efficiency of the safety coupling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the friction plate structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the safety pin structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the outer fixing ring structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the clamping airbag structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Coupling sleeve; 2. Flange; 3. Embedded groove; 4. First embedded block; 5. Friction plate; 6. Second embedded block; 7. Double-ended bolt; 8. Driving shaft sleeve; 9. Driven shaft sleeve; 10. Safety groove; 11. Safety pin; 12. Driving shaft body; 13. Fitting groove; 14. Outer retaining ring; 15. Fastening bolt; 16. Clamping bracket; 17. Clamping airbag; 18. Inner anti-slip texture; 19. Injection port. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides, for example Figure 1-5 The safety coupling shown includes a coupling sleeve 1, which is a main body for shaft connection;

[0027] Flange 2 is fixedly installed on both sides of the outer side of the coupling sleeve 1 for assembly and splicing. The outer side of flange 2 is provided with an embedding groove 3. The first embedding block 4 is embedded inside the embedding groove 3. Friction plate 5 is fixedly installed on the outer side of the first embedding block 4. The other side of the outer side of friction plate 5 is fixedly installed with a second embedding block 6.

[0028] Double-ended bolts 7, all threaded through the outside of flange 2, are used for threaded connection of drive bushing 8 at the front end, and driven bushing 9 is threadedly connected to the other side of coupling sleeve 1. Outer retaining rings 14 are fixedly installed on both sides of the outside of drive bushing 8. Fastening bolts 15 are threaded through the outside of outer retaining rings 14. A clamping bracket 16 is threadedly connected to the bottom end of fastening bolts 15.

[0029] The clamping airbag 17 is fixedly installed inside the clamping frame 16 to compress the shaft body. The clamping airbag 17 is provided with internal anti-slip texture 18. The external part of the drive shaft sleeve 8 is provided with a pressure port 19. In addition to inserting the safety pin 11 into the matching groove 13 of the drive shaft 12 to fix the drive shaft 12, the clamping frame 16 is also installed inside the drive shaft sleeve 8. A certain pressure gas is injected through the pressure port 19 to inflate the clamping airbag 17 inside, thereby clamping the drive shaft 12.

[0030] like Figure 1 , Figure 2 and Figure 3As shown, the first embedded block 4, which is fixedly installed on the outside of the friction plate 5, engages with the embedded groove 3 opened on the outside of the flange 2. The external dimensions of the first embedded block 4 match the internal dimensions of the embedded groove 3. When both the driving bushing 8 and the driven bushing 9 are connected to the coupling sleeve 1, the friction plate 5 is inserted between the driving bushing 8 and the driven bushing 9 and the coupling sleeve 1, which increases the friction area and thus transmits torque. The driving bushing 8 is threaded to the coupling sleeve 1. The double-ended bolts 7 are arranged in a ring array on the flange 2. The double-ended bolts 7 are used to strengthen the tightness of the connection between the driving bushing 8 and the driven bushing 9 and the two ends of the coupling sleeve 1. A safety groove 10 is opened on the outside of the driving bushing 8. A safety pin 11 is embedded inside the safety groove 10. The safety pin 11 is inserted from the safety groove 10 and its bottom end abuts against the mating groove 13 of the driving shaft 12, thus forming overload protection.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, the active shaft sleeve 8 is fitted with an active shaft body 12, and the active shaft body 12 is provided with a mating groove 13 on the outside. The bottom end of the safety pin 11 is used in conjunction with the mating groove 13. The overall structure of the safety pin 11 is simple, and if a fault occurs, it is convenient for maintenance personnel to replace it in time without delaying the normal use of the device. The number of internal anti-slip textures 18 is set to multiple, and the multiple internal anti-slip textures 18 are distributed in a ring array on the clamping airbag 17. The internal anti-slip textures 18 provided inside the clamping airbag 17 further increase the friction with the active shaft body 12.

[0032] The working principle of this practical device is as follows: First, when using this safety coupling, take it out and insert the drive shaft 12 into the drive sleeve 8. Then, insert the safety pin 11 from the safety groove 10. The bottom end of the safety pin 11 abuts against the mating groove 13 of the drive shaft 12, thus forming overload protection. Next, in addition to inserting the safety pin 11 into the mating groove 13 of the drive shaft 12 to fix the drive shaft 12, a clamping frame 16 is also installed inside the drive sleeve 8. A certain amount of pressurized gas is injected into the injection port 19 by an external air pump, causing the internal clamping airbag 17 to expand, thereby tightening the drive shaft 12. At the same time, the internal anti-slip texture 18 of the clamping airbag 17 further increases the friction with the drive shaft 12. Subsequently, the driven shaft is also clamped in the same way at the driven sleeve 9 at the other end of the safety coupling. After installation, when using the safety coupling, friction plates 5 are inserted between the driving sleeve 8 and the driven sleeve 9 and the coupling body 1. This increases the friction area, thereby transmitting torque. This also gives the safety coupling overload protection. Under slight overload, the friction plates 5 slip, absorbing impact energy. Under extreme overload, the safety pin 11 breaks, and the clamping airbag 17 releases pressure, achieving dual protection from flexible to hard disconnection, thus increasing the safety of the safety coupling. This graded response mechanism reduces torque fluctuations caused by axial movement, further ensuring the efficiency of the safety coupling. Finally, after completing the installation and use of the safety coupling according to the above operations, routine maintenance is required. This completes the use of the safety coupling.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A safety coupling characterised in that: include Coupling sleeve (1), the main body used for shaft connection; Flange (2) is fixedly installed on both sides of the outer side of the coupling sleeve (1) for assembly and splicing. An embedding groove (3) is provided on the outer side of the flange (2). A first embedding block (4) is embedded inside the embedding groove (3). A friction plate (5) is fixedly installed on the outer side of the first embedding block (4). A second embedding block (6) is fixedly installed on the other side of the outer side of the friction plate (5). Double-ended bolts (7) are threaded through the outside of the flange (2) and are used to connect the front end of the drive bushing (8). The other side of the coupling sleeve (1) is threaded to the driven bushing (9). The outer two sides of the drive bushing (8) are fixedly installed with outer fixing rings (14). The outer threads of the outer fixing rings (14) are threaded through the fastening bolts (15). The bottom end of the fastening bolts (15) is threaded to the clamping bracket (16). The clamping airbag (17) is fixedly installed inside the clamping frame (16) for squeezing the shaft body. The clamping airbag (17) is provided with internal anti-slip texture (18), and the active shaft sleeve (8) is provided with injection port (19).

2. A safety coupling according to claim 1, characterised in that: The first embedded block (4) fixedly installed on the outside of the friction plate (5) is engaged with the embedded groove (3) opened on the outside of the flange (2), and the external dimensions of the first embedded block (4) match the internal dimensions of the embedded groove (3).

3. A safety coupling according to claim 1, characterised in that: The drive bushing (8) is threaded to the coupling sleeve (1), and the double-ended bolts (7) are arranged in a ring array on the flange (2).

4. A safety coupling according to claim 1, characterized in that: The drive bushing (8) has a safety groove (10) on its outside, and a safety pin (11) is embedded inside the safety groove (10).

5. A safety coupling according to claim 4, characterized in that: The drive shaft sleeve (8) is fitted with a drive shaft body (12), and the drive shaft body (12) is provided with a fitting groove (13) on the outside. The bottom end of the safety pin (11) is used in conjunction with the fitting groove (13).

6. A safety coupling according to claim 1, characterized in that: The number of the inner anti-slip textures (18) is set to multiple, and the multiple inner anti-slip textures (18) are distributed in a ring array on the holding airbag (17).

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