Hydraulic safety coupling capable of being quickly disassembled and assembled

Abstract

The invention discloses a hydraulic safety coupling capable of being quickly disassembled and assembled and aims to solve the problems that in the prior art, a coupling is inconvenient to disassemble and assemble, the bearing capacity of a shear pipe is limited, waste is easily caused, and a quick-plug connector of an oil injection port is easily disengaged. The coupling comprises a locking taper sleeve, a locking screw, a separating disc spring, a coupling outer sleeve, a lubricating oil port plugging screw, a connecting screw, a quincunx shear ring, a split type shear pipe, a first movable sealing ring, a static sealing ring, a first bearing, a coupling expansion inner sleeve, a second bearing, a second movable sealing ring and an axial self-locking oil injection port. Through structural innovation, the hydraulic safety coupler has the advantages of being simple in structure, small in radial size, convenient and rapid to disassemble and assemble, high in sealing performance, capable of reusing materials, safe and reliable in oil injection and the like, the overall performance and user experience of products are remarkably improved, and the hydraulic safety coupler has good practical value and market prospects.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of couplings, in particular to a quick disassembly and assembly hydraulic safety coupling. BACKGROUND

[0002] As an overload protection device that transmits friction torque through hydraulic expansion, the hydraulic safety coupling has significant advantages in application scenarios with strict space requirements, such as shield machine motor protection. However, the existing hydraulic safety coupling still faces some challenges in practical application. For example, the traditional axial locking structure, such as two half rings connected by threads, is usually cumbersome to install and disassemble, requiring repeated tightening of end face screws, which not only wastes time but also reduces the convenience of equipment maintenance.

[0003] In addition, the existing hydraulic safety coupling also has limitations in terms of pressure relief protection components. For example, the shear pipe, as a key pressure relief component, usually adopts a whole copper structure, making it a disposable part. Since copper is relatively soft, the tightening torque it can withstand is limited, which may affect the overall sealing performance and reliability of the coupling. At the same time, when the shear pipe fails, the whole replacement results in more material waste. Furthermore, the closed equal-diameter oil inlet in the existing design has the risk of easy falling of the quick connector in actual operation, which not only affects the oiling efficiency but also may cause safety hazards. SUMMARY

[0004] The present application aims to provide a quick disassembly and assembly hydraulic safety coupling to solve the technical problems of inconvenient disassembly and assembly of the coupling, limited bearing capacity of the shear pipe and easy waste, and easy falling of the quick connector of the oil inlet in the existing technology, thereby improving the overall performance, reliability and use convenience of the coupling.

[0005] To achieve the above purpose, the present application proposes the following technical solution: a quick disassembly and assembly hydraulic safety coupling, comprising: a locking cone sleeve (1), a locking screw (2), a separation disc spring (3), a coupling outer sleeve (4), a lubricating oil port plugging screw (5), a connecting screw (6), a key-shaped shear ring (7), a split shear pipe (8), a dynamic sealing ring one (9), a static sealing ring (10), a bearing one (11), a coupling expansion inner sleeve (12), a bearing two (13), a dynamic sealing ring two (14), and an axially self-locking oil inlet (15); the split shear pipe (8) comprises a steel locking screw sleeve (8-1), a copper hollow pipe (8-2), and a high-pressure sealing ring one (8-3); the axially self-locking oil inlet (15) comprises a variable inner diameter oil inlet (15-1) and a high-pressure sealing ring two (15-2).

[0006] Further, in the application, the locking cone sleeve (1) is provided with a plurality of locking screws (2) on the outside, the right side of the locking screw (2) is provided with a separate disc spring (3), the left end surface of the separate disc spring (3) is attached to the locking cone sleeve (1), the right end surface is attached to the shaft coupling sleeve (4), and the locking screw (2) is sequentially threaded through the locking cone sleeve (1), the separate disc spring (3) and the shaft coupling sleeve (4) for threaded connection.

[0007] Further, in the application, the shaft coupling expansion inner sleeve (12) is provided with a bearing two (13) on the left side, the left side of the bearing two (13) is provided with a dynamic sealing ring two (14), the inner ring of the bearing two (13) and the dynamic sealing ring two (14) is matched with the shaft coupling expansion inner sleeve (12), and the outer ring is matched with the shaft coupling sleeve (4), wherein the inner ring of the dynamic sealing ring two (14) and the shaft coupling expansion inner sleeve (12) can relatively slip.

[0008] Further, in the application, the shaft coupling expansion inner sleeve (12) is provided with a bearing one (11) on the right side, the right side of the bearing one (11) is provided with a dynamic sealing ring one (9), the left side of the dynamic sealing ring one (9) is provided with a plum blossom shaped shear ring (7), the outside of the plum blossom shaped shear ring (7) is provided with a static sealing ring (10); the inner ring of the bearing one (11) is matched with the shaft coupling expansion inner sleeve (12), the outer ring is matched with the shaft coupling sleeve (4), the inner ring of the dynamic sealing ring one (9) is matched with the shaft coupling expansion inner sleeve (12), the outer ring is matched with the inner side of the plum blossom shaped shear ring (7), and the outside of the plum blossom shaped shear ring (7) is matched with the shaft coupling sleeve (4); wherein the inner ring of the dynamic sealing ring one (9) and the shaft coupling expansion inner sleeve (12) can relatively slip, and the plum blossom shaped shear ring (7) and the shaft coupling sleeve (4) are threadedly connected through the connecting screw (6).

[0009] Further, in the application, the shaft coupling sleeve (4) is provided with a lubricating oil port plugging screw (5) on the outside.

[0010] Further, in the application, the right end surface of the shaft coupling expansion inner sleeve (12) is provided with a split type shear pipe (8) and an axially self-locking oil injection port (15), the inner side of the outer cylindrical surface of the shaft coupling expansion inner sleeve (12) is provided with a hydraulic expansion cavity, and the hydraulic expansion cavity is communicated with the bottom of the split type shear pipe (8) and the side surface of the axially self-locking oil injection port (15) through an oil channel.

[0011] Further, in the application, the split type shear pipe (8) is provided with a high pressure sealing ring one (8-3) on the outside below the steel locking screw sleeve (8-1), and a copper hollow pipe (8-2) on the inside, the lower conical surface of the steel locking screw sleeve (8-1) is attached to the conical surface of the copper hollow pipe (8-2), and the inner hole of the steel locking screw sleeve (8-1) is matched with the small gap of the copper hollow pipe (8-2).

[0012] Further, in the application, the variable inner diameter oil inlet (15-1) of the axially self-locking oil inlet (15) is provided with a high-pressure sealing ring (15-2) on the outer side below the variable inner diameter oil inlet (15-1), and the inner hole of the variable inner diameter oil inlet (15-1) has a smaller upper half inner diameter than a lower half inner diameter.

[0013] Further, in the application, when installed, the locking cone sleeve (1) is axially locked by the locking screw (2), so that the left tapered surface of the coupling sleeve (4) with a gap is tightened, thereby tightly holding the motor hollow shaft and axially constrained by friction; when disassembled, the locking screw (2) is loosened, and the locking cone sleeve (1) and the coupling sleeve (4) are separated from the tapered surface to realize free release under the action of the separating disc spring (3).

[0014] Further, in the application, when overloaded and slipping, the copper hollow pipe (8-2) is sheared to cause pressure relief, the steel locking screw sleeve (8-1) can be reused, and the star-shaped shearing ring (7) makes the adjustment angle smaller when re-pressing.

[0015] Beneficial effects, the technical scheme of the present application has the following technical effects:

[0016] The hydraulic safety coupling provided by the application can be quickly disassembled, the locking cone sleeve is axially locked by the locking screw, the coupling sleeve tightly holds the motor hollow shaft, and is axially constrained by friction, thereby effectively solving the problem of inconvenient disassembly of the coupling in the prior art. When disassembled, only two locking screws need to be loosened, and the locking cone sleeve and the coupling sleeve can be separated from the tapered surface to realize free release under the action of the large separating disc spring, thereby significantly improving the convenience and speed of disassembly. At the same time, the separating disc spring also has better anti-loosening effect, thereby improving the stability of the coupling in operation.

[0017] In addition, the application adopts a split shearing pipe structure, the steel locking screw sleeve can bear a higher tightening torque, thereby providing a higher locking axial force, effectively improving the sealing performance of the coupling, and the steel screw sleeve can be reused, thereby reducing material waste. The copper hollow pipe structure is simple, thereby further reducing material and manufacturing costs. The axially self-locking oil inlet design is more easily processed, and in the oil injection process, the upper half inner diameter of the variable inner diameter oil inlet is smaller than the lower half inner diameter, so that the quick connector generates a net locking force in the axial direction, thereby effectively avoiding the risk of quick connector falling off and improving the safety of operation.

[0018] In summary, through the structural innovation, the hydraulic safety coupling has the advantages of simple structure, small radial size, convenient and fast disassembly, high sealing performance, reusable material, safe and reliable oil injection, and the like, thereby significantly improving the overall performance and user experience of the product, and having good practical value and market prospect.

[0019] It should be appreciated that all combinations of the foregoing concepts and additional concepts described in greater detail below (provided such concepts are not mutually inconsistent) are contemplated as being part of the inventive subject matter. For example, a specific embodiment of a particular concept can be combined with an embodiment of another concept to create another embodiment that falls within the scope of the inventive subject matter.

[0020] The foregoing and other aspects, embodiments and features of the present teachings can be better understood from the following detailed description taken in conjunction with the accompanying drawings. Additional features of the present teachings will be described or will become apparent in the course of the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical, or nearly identical, component that is illustrated in various figures is represented with a like numeral. For purposes of clarity, not every component is called out in every drawing. Embodiments of various aspects of the present teachings will now be described, by way of example, with reference to the drawings, in which:

[0022] Figure 1 is a schematic view of the structure of the present invention.

[0023] Figure 2 is a schematic view of the structure of the present invention. Figure 1 is a sectional view taken along line A-A in the present invention.

[0024] Figure 3 is a schematic view of the structure of the present invention. Figure 2 is a sectional view taken along line B-B in the present invention.

[0025] Figure 4 is a schematic view of the split shear pipe and the axially self-locking oil filling port structure of the present invention.

[0026] In the drawings, the meaning of the reference numerals is as follows: 1, locking cone sleeve; 2, locking screw; 3, split disc spring; 4, coupling outer sleeve; 5, lubricating oil port blocking screw; 6, connecting screw; 7, key-shaped shear ring; 8, split shear pipe; 8-1, steel locking screw sleeve; 8-2, copper hollow pipe; 8-3, high-pressure sealing ring one; 9, dynamic sealing ring one; 10, static sealing ring; 11, bearing one; 12, coupling expansion inner sleeve; 13, bearing two; 14, dynamic sealing ring two; 15, axially self-locking oil filling port; 15-1, variable inner diameter oil filling port; 15-2, high-pressure sealing ring two. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below with reference to the drawings, to clearly illustrate the structure, purpose, advantages, positional relationship and connection mode of each component. It should be noted that the directionality indication (such as "front", "rear", "upper" and "lower") in the present embodiments is based on the posture shown in the drawings, and is only used to describe the relative positional relationship and movement of the components. If the posture is changed, the directionality indication should be adjusted accordingly. The "connection" includes mechanical connection and electrical connection, which can be fixed connection, detachable connection or indirect connection through an intermediate medium, and the specific meaning is understood by those skilled in the art according to the context. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] The present embodiment provides a quick disassembly and assembly hydraulic safety coupling, which mainly comprises a locking cone sleeve 1, locking screws 2, a split disc spring 3, a coupling outer sleeve 4, a lubricating oil port plugging screw 5, a connecting screw 6, a key-shaped shear ring 7, a split shear pipe 8, a dynamic sealing ring 1 9, a static sealing ring 10, a bearing 1 1, a coupling expansion inner sleeve 12, a bearing 2 13, a dynamic sealing ring 2 14 and an axially self-locking oil injection port 15.

[0029] The split shear pipe 8 is further divided into a steel locking screw sleeve 8-1, a copper hollow pipe 8-2 and a high-pressure sealing ring 1 8-3. This split structure enables the steel locking screw sleeve 8-1 to withstand higher tightening torque, thereby providing greater locking axial force, effectively improving the sealing performance of the coupling, and the steel screw sleeve can be reused, reducing material waste. The copper hollow pipe 8-2 is simple in structure and easy to process and replace.

[0030] The axially self-locking oil injection port 15 comprises a variable inner diameter oil injection port 15-1 and a high-pressure sealing ring 2 15-2. The inner hole of the variable inner diameter oil injection port 15-1 has a smaller inner diameter in the upper half than in the lower half. This design enables the quick connector to generate a net locking force in the axial direction when high-pressure oil is injected, effectively preventing the quick connector from falling off and improving the safety of the operation.

[0031] The locking cone sleeve 1 is provided with a plurality of locking screws 2 on the outer side. The right side of the locking screw 2 is provided with a split disc spring 3, the left end face of the split disc spring 3 is attached to the locking cone sleeve 1, and the right end face is attached to the coupling outer sleeve 4. The locking screw 2 is threadedly connected in sequence through the locking cone sleeve 1, the split disc spring 3 and the coupling outer sleeve 4. This structure design enables the locking cone sleeve 1 to be axially tightened by tightening the locking screw 2, and then the left side of the coupling outer sleeve 4 with a gap is tightened, thereby tightly holding the hollow shaft of the motor, realizing axial constraint and positioning. The split disc spring 3 is compressed in this process, not only providing a separation force when disassembled, but also having a loosening function, ensuring the stability of the coupling during operation.

[0032] The left side of the coupling expansion inner sleeve 12 is provided with bearing two 13, and the left side of the bearing two 13 is provided with dynamic sealing ring two 14. The inner ring of the bearing two 13 and the dynamic sealing ring two 14 is matched with the coupling expansion inner sleeve 12, and the outer ring is matched with the coupling outer sleeve 4. Among them, the inner ring of the dynamic sealing ring two 14 can slide relative to the coupling expansion inner sleeve 12, which ensures the relative movement and sealing performance of the coupling during operation.

[0033] The right side of the coupling expansion inner sleeve 12 is provided with bearing one 11, and the right side of the bearing one 11 is provided with dynamic sealing ring one 9. The left side of the dynamic sealing ring one 9 is provided with the plum blossom shaped shear ring 7, and the outer side of the plum blossom shaped shear ring 7 is provided with the static sealing ring 10. The inner ring of the bearing one 11 is matched with the coupling expansion inner sleeve 12, and the outer ring is matched with the coupling outer sleeve 4. The inner ring of the dynamic sealing ring one 9 is matched with the coupling expansion inner sleeve 12, and the outer ring is matched with the inner side of the plum blossom shaped shear ring 7. The outer side of the plum blossom shaped shear ring 7 is matched with the coupling outer sleeve 4. Among them, the inner ring of the dynamic sealing ring one 9 can slide relative to the coupling expansion inner sleeve 12, and the plum blossom shaped shear ring 7 is threadedly connected with the coupling outer sleeve 4 through the connecting screw 6. The design of the plum blossom shaped shear ring 7 makes the adjustment angle smaller when re-pressing, shortens the adjustment time, and improves the maintenance efficiency.

[0034] The outer side of the coupling outer sleeve 4 is provided with a lubricating oil port plugging screw 5, which is used for plugging after injecting lubricating oil before use, to ensure the integrity of the lubricating system.

[0035] The right end surface of the coupling expansion inner sleeve 12 is provided with a split shear pipe 8 and an axially self-locking oil injection port 15. The inner side of the outer cylindrical surface of the coupling expansion inner sleeve 12 is provided with a hydraulic expansion cavity, and the bottom of the split shear pipe 8 and the side of the axially self-locking oil injection port 15 are communicated through an oil channel. This design enables high-pressure oil to smoothly enter the expansion cavity, realizing the hydraulic expansion and torque transmission of the coupling.

[0036] Working principle

[0037] The working principle of the application mainly includes three stages of installation, operation and disassembly:

[0038] The installation stage: lubricating oil filling, before use, first inject lubricating oil from the axially self-locking oil injection port 15, and then tighten the lubricating oil port plugging screw 5 after filling.

[0039] Hydraulic expansion, after tightening the split shear pipe 8, turn back half a turn, then insert the quick connector into the axial self-locking oil inlet 15, pump high pressure oil. High pressure oil along the oil way into the hydraulic expansion chamber of the coupling expansion inner sleeve 12, so that the friction surface of the coupling outer sleeve 4 and the coupling expansion inner sleeve 12 closely, so as to realize torque transmission. When the pump pressure reaches the predetermined pressure, tighten the shear pipe 8. In this process, because the inner diameter of the variable inner diameter oil inlet 15-1 is smaller than the lower half, and the diameter of the quick connector is consistent, the lower side of the quick connector high pressure sealing ring annular pressure surface is larger than the upper side, which will produce axial net locking force, so that the quick connector is not easy to fall off, and the safety is improved.

[0040] Axial positioning, install the coupling as a whole, keep the inner spline of the coupling outer sleeve 4 matched with the outer spline of the motor hollow shaft, and the inner spline of the coupling expansion inner sleeve 12 matched with the outer spline of the machine motor shaft. Then, alternately tighten the two locking screws 2 to the set torque. At this time, the coupling outer sleeve 4 will lock the motor hollow shaft, realizing axial positioning. In this process, the separation disc spring 3 will be compressed, playing a role in preventing loosening.

[0041] Running stage:

[0042] In the normal running process, the coupling transmits torque through the friction force generated by hydraulic expansion. When overload slip occurs, the copper hollow pipe 8-2 in the split shear pipe 8 will be sheared off, causing the oil in the hydraulic expansion chamber to be depressurized, thereby cutting off the torque transmission, protecting the motor and equipment from damage.

[0043] Disassembly and maintenance stage:

[0044] Replacement after pressure relief: when the copper hollow pipe 8-2 is sheared off, causing pressure relief, directly unscrew the steel locking nut 8-1, which will pull out the copper hollow pipe 8-2. Then remove the damaged copper hollow pipe 8-2 and replace it with a new one, re-tighten the steel locking nut 8-1, and adjust the torx shear ring 7 to the appropriate position, and repeat the pressure operation to restore the torque transmission function. In this process, the steel locking nut 8-1 can be reused, and its hardness is high, which can bear higher tightening torque, ensuring the sealing effect of the shear pipe 8. The torx shear ring 7 reduces the adjustment angle and shortens the adjustment time.

[0045] Overall disassembly: when the coupling as a whole needs to be removed, only the two locking screws 2 need to be alternately loosened. At this time, the split tapered surface of the locking cone sleeve 1 and the coupling outer sleeve 4 will be out of close contact under the action of the large force of the separation disc spring 3, and the locking state will be released. Then, remove the locking screw assembly, and further directly pull out the coupling axially to complete the disassembly. The whole disassembly process is convenient and fast.

[0046] The existing hydraulic safety coupling often adopts a half-ring structure of threaded connection in axial locking, resulting in a complicated and time-consuming dismounting process. The present application realizes the axial constraint during quick installation through the innovative design of introducing a "locking screw axial with tight locking cone sleeve, which makes the coupling sleeve tightly hold the hollow shaft of the motor". More importantly, during dismounting, only the "locking screw is loosened, and under the action of the separating disc spring big jacking force, the locking cone sleeve and the coupling sleeve are separated from the conical surface to realize free release", greatly simplifying the dismounting process and realizing quick and convenient dismounting. This mechanism of realizing quick locking and release through the cooperation of the locking screw and the separating disc spring has not been disclosed or suggested in the prior art, and effectively solves the long-standing problem of low dismounting efficiency, bringing significant practical value.

[0047] The existing shear pipe is mostly of an integral copper structure, which has the disadvantages of limited bearing capacity and easy waste. The present application innovatively adopts a "split type shear pipe" design, including a "steel locking screw sleeve" and a "copper hollow pipe". The steel locking screw sleeve can withstand higher tightening torque, thereby providing higher locking axial force, effectively improving the sealing performance of the coupling, and solving the problem of insufficient sealing performance of the traditional copper shear pipe due to the soft material. In addition, the steel locking screw sleeve can be reused, only the easily damaged copper hollow pipe needs to be replaced, significantly reducing material waste and meeting the concept of sustainable development. This split design improves performance while taking into account economy and environmental protection, which is unforeseen in the prior art.

[0048] The closed equal-diameter oil injection port in the prior art has the risk of easy falling of the quick connector, affecting the operation safety. The present application introduces an "axially self-locking oil injection port", and through the ingenious design of "the upper half of the inner hole of the variable inner diameter oil injection port having a smaller inner diameter than the lower half", when high-pressure oil is injected, the lower side of the quick connector has a larger annular pressure surface than the upper side, thereby generating an axial net locking force, effectively preventing the quick connector from falling. This innovative design solves the safety hazard of oil injection in the prior art and improves the reliability of operation, which has not been disclosed or suggested in the prior art.

[0049] The technical features of the present application are not simply stacked, but cooperate and synergize to achieve multiple technical effects such as "quick dismounting", "high sealing performance", "material reuse" and "oil injection safety". For example, the separating disc spring not only assists quick dismounting, but also has an anti-loosening function; the split type shear pipe not only improves the bearing capacity, but also provides a structural basis for reuse; the design of the variable inner diameter oil injection port is closely combined with the hydraulic expansion principle, ensuring the safety of the oil injection process. The organic combination of these technical features makes the present application surpass the simple combination of the prior art in overall performance, achieving unexpected technical effects.

[0050] In summary, the application solves multiple technical problems in the prior art and brings significant positive effects by innovative improvements on the dismounting structure of the shaft coupling, the design of the shear pipe and the structure of the oil injection port, and the technical solution has non-obviousness and meets the requirement of the patent law on creativity.

[0051] While the application has been described by reference to the preferred embodiments, it should be understood that various changes can be made and equivalents can be substituted for elements thereof without departing from the spirit and scope of the application. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the application without departing from the central inventive concept described herein. Accordingly, the application is intended to embrace all such alterations, permutations, and combinations.

Claims

1. A hydraulic safety coupling that can be quickly disassembled and assembled, characterized in that, include: Locking tapered sleeve (1), locking screw (2), separating disc spring (3), coupling outer sleeve (4), lubricating oil port plugging screw (5), connecting screw (6), plum blossom-shaped shear ring (7), split shear tube (8), dynamic seal ring one (9), static seal ring (10), bearing one (11), coupling expansion inner sleeve (12), bearing two (13), dynamic seal ring two (14), and axially self-locking oil inlet (15); The split-type shear tube (8) includes a steel locking nut (8-1), a copper hollow tube (8-2), and a high-pressure sealing ring (8-3); The axially self-locking oil inlet (15) includes a variable inner diameter oil inlet (15-1) and a high-pressure sealing ring II (15-2).

2. The quick-disassembly hydraulic safety coupling according to claim 1, characterized in that, The locking cone sleeve (1) is provided with multiple locking screws (2) on the outside. A release disc spring (3) is provided on the right side of the locking screw (2). The left end face of the release disc spring (3) is in contact with the locking cone sleeve (1), and the right end face is in contact with the coupling sleeve (4). The locking screw (2) passes through the locking cone sleeve (1), the release disc spring (3) and the coupling sleeve (4) in sequence for threaded connection.

3. A quick-disassembly hydraulic safety coupling according to claim 1, characterized in that, The inner sleeve (12) of the coupling is provided with a bearing 2 (13) on the left side, and a dynamic seal ring 2 (14) is provided on the left side of the bearing 2 (13). The inner rings of the bearing 2 (13) and the dynamic seal ring 2 (14) are fitted with the inner sleeve (12) of the coupling, and the outer rings are fitted with the outer sleeve (4) of the coupling. The inner ring of the dynamic seal ring 2 (14) and the inner sleeve (12) of the coupling can slip relative to each other.

4. A quick-release hydraulic safety coupling according to claim 1, characterized in that, The coupling expansion inner sleeve (12) is provided with a bearing (11) on the right side, a dynamic seal ring (9) on the right side of the bearing (11), a plum blossom-shaped shear ring (7) on the left side of the dynamic seal ring (9), and a static seal ring (10) on the outer side of the plum blossom-shaped shear ring (7). The inner ring of the bearing (11) is fitted with the coupling expansion inner sleeve (12), and the outer ring is fitted with the coupling outer sleeve (4). The inner ring of the dynamic seal ring (9) is fitted with the coupling expansion inner sleeve (12), and the outer ring is fitted with the inner side of the plum blossom-shaped shear ring (7). The outer side of the plum blossom-shaped shear ring (7) is fitted with the coupling outer sleeve (4). The inner ring of the dynamic seal ring (9) and the coupling expansion inner sleeve (12) can slip relative to each other. The plum blossom-shaped shear ring (7) and the coupling outer sleeve (4) are connected by a connecting screw (6).

5. A quick-disassembly and assembly hydraulic safety coupling according to claim 1, characterized in that, The outer side of the coupling sleeve (4) is provided with a lubricating oil port sealing screw (5).

6. A quick-assembly and disassembly hydraulic safety coupling according to claim 1, characterized in that, The right end face of the coupling expansion sleeve (12) is provided with a split shear tube (8) and an axially self-locking oil inlet (15). The inner side of the outer cylindrical surface of the coupling expansion sleeve (12) is provided with a hydraulic expansion chamber. The hydraulic expansion chamber is connected to the bottom of the split shear tube (8) and the side of the axially self-locking oil inlet (15) through an oil passage.

7. A quick-disassembly and assembly hydraulic safety coupling according to claim 6, characterized in that, The split shear tube (8) has a high-pressure sealing ring (8-3) on the outer side below the steel locking nut (8-1) and a copper hollow tube (8-2) on the inner side. The lower conical surface of the steel locking nut (8-1) fits against the conical surface of the copper hollow tube (8-2), and the inner hole of the steel locking nut (8-1) is fitted with the copper hollow tube (8-2) with a small clearance.

8. A quick-disassembly hydraulic safety coupling according to claim 6, characterized in that, The variable inner diameter oil inlet (15-1) of the axially self-locking oil inlet (15) is provided with a high-pressure sealing ring 2 (15-2) on the outer side below. The inner diameter of the upper half of the inner hole of the variable inner diameter oil inlet (15-1) is smaller than that of the lower half.

9. A method for quickly assembling and disassembling a hydraulic safety coupling, characterized in that, The process includes the following steps: During installation, the locking cone sleeve (1) is axially tightened by the locking screw (2), which tightens the left cone surface of the coupling sleeve (4) with a gap, thereby gripping the hollow shaft of the motor and constraining it axially through friction. During disassembly, the locking screw (2) is loosened, and under the action of the release disc spring (3), the locking cone sleeve (1) and the coupling sleeve (4) are released from the cone surface.

10. A quick-disassembly hydraulic safety coupling according to claim 1, characterized in that, When the split shear tube (8) slips due to overload, the copper hollow tube (8-2) is sheared, causing pressure relief. The steel locking nut (8-1) can be reused, and the plum blossom-shaped shear ring (7) makes the adjustment angle smaller when repressurizing.

Images