Disassembly-free easy-to-replace elastic coupling

Abstract

The utility model discloses a disassembly-free elastic coupling easy to replace, and belongs to the technical field of couplings. The coupler comprises a first half coupler and a second half coupler which transmit torque through an elastic block. The outer fixing sleeve assembly is an annular sleeve formed by splicing two sets of semicircular sleeves and installed on the first half coupler, and elastic blocks are limited to move outwards in the radial direction. The pressing plate is fixed in the first half coupler and connected with the output shaft end of the chain wheel shaft set to limit the elastic block to move inwards in the radial direction. The outer fixing sleeve assembly is detachable, the pressing plate is also detachably connected with the shaft end, and clamping grooves matched with the columnar elastic blocks are formed in the butt joint end faces of the half couplings. When the elastic block is replaced, only the outer fixing sleeve assembly and the pressing plate need to be detached, and the power part and the half coupling do not need to be detached. Compared with the prior art, the single-column elastic block inner and outer sleeve radial limiting technology is adopted, the problem that the elastic block is difficult to replace is solved, the underground stop production time is shortened, the coal mining progress is guaranteed, meanwhile, the torque transmission stability of the coupler is improved, and the service life of the coupler is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and more specifically, to a flexible coupling that is easy to replace without disassembly. Background Technology

[0002] Currently, traditional flexible couplings mainly consist of three parts: half-coupling one, elastic block, and half-coupling two. Their working principle is as follows: the internal elastic block compensates for the misalignment between the input and output shafts, thereby achieving synchronous operation of the two shafts. They are suitable for various misalignment scenarios and precise torque transmission, especially for high-speed, heavy-load power transmission systems. They can buffer, dampen vibrations, and improve the dynamic performance of the shaft system. The procedure for replacing the elastic element in a traditional flexible coupling is as follows: Before replacing the elastic element, the machine must be stopped and the power supply disconnected to ensure the equipment is in a safe state. Prepare appropriate tools, such as wrenches, screwdrivers, and jacks. Also, prepare the new elastic element. If the coupling has a cover, it needs to be removed first to expose the internal structure of the coupling. Using appropriate tools, such as wrenches and jacks, remove the power unit on one side of the equipment, and then separate the two halves of the coupling. During the separation process, care should be taken to avoid damaging the coupling and shaft. After separating the two halves of the coupling, the old elastic element can be seen. Use tools to remove the old elastic element and clean the inside of the coupling of debris and oil. Then use special tools to install the new elastic element between the two halves of the coupling.

[0003] When flexible couplings are used downhole, if the elastic block is damaged and needs to be replaced, the entire replacement process is cumbersome and time-consuming, and it is also easy to damage the components. It is also not conducive to the operation of downhole personnel to replace the elastic block. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of existing technologies and propose a non-disassembly, easily replaceable flexible coupling for connecting the power unit and the crushing shaft assembly of an underground crusher, comprising:

[0005] Half-coupling one and half-coupling two transmit torque through an elastic block;

[0006] The external fixed sleeve assembly consists of two sets of semicircular sleeves spliced ​​together by connecting bolts to form an annular sleeve, and is installed on the first half coupling by bolt assembly to restrict the elastic block from moving radially outward;

[0007] The pressure plate, fixed inside the first half-coupling, is connected to the output shaft end of the sprocket shaft assembly via a connecting bolt assembly, and is used to restrict the elastic block from moving radially inward.

[0008] Preferably, the two sets of semicircular sleeves of the outer fixing sleeve assembly are connected by bolts to form a detachable annular sleeve structure.

[0009] Preferably, the pressure plate is detachably connected to the output shaft end of the sprocket shaft assembly via a connecting bolt assembly.

[0010] Preferably, the mating end faces of the first half-coupling and the second half-coupling are formed with grooves that cooperate with the elastic block;

[0011] The elastic blocks are columnar in shape, and each elastic block is embedded in a groove formed by the mating end faces of half coupling one and half coupling two.

[0012] Preferably, the bolt assembly is a fastening bolt that passes through the outer fixing sleeve assembly and is threadedly connected to the half coupling, and a locating pin is provided between the outer fixing sleeve assembly and the half coupling.

[0013] Preferably, a wear-resistant liner is provided between the inner wall of the outer fixing sleeve assembly and the outer peripheral surface of the elastic block, and the thickness of the wear-resistant liner is 1-3mm.

[0014] Preferably, when replacing the elastic block, only the outer fixing sleeve assembly and pressure plate need to be removed to directly disassemble and replace the elastic block, without disassembling the power unit and half coupling one and half coupling two.

[0015] Compared with existing technologies, the beneficial effects of this utility model are:

[0016] 1. The single-column elastic block inner and outer radial limiting technology is used to replace the traditional double-column elastic block axial limiting technology to compensate for the deviation between the input and output axes, thereby achieving synchronous operation of the two axes.

[0017] 2. During routine maintenance and replacement of the elastic block, only the outer fixing sleeve assembly and pressure plate need to be removed to directly disassemble and replace the elastic block. There is no need to disassemble the power unit and half coupling one and half coupling two, which effectively solves the problem of difficulty in replacing the elastic block of the elastic coupling, thereby reducing the problem of wasted downtime in the well. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly of a traditional flexible coupling mentioned in the background section;

[0019] Figure 2 This is an assembly diagram of a non-disassembly and easily replaceable flexible coupling proposed in this utility model;

[0020] Figure 3 This is a three-dimensional exploded view of an easy-to-replace flexible coupling that does not require disassembly, as proposed in this utility model.

[0021] In the diagram: 1-Half Coupling I, 2-Outer Fixed Sleeve Assembly, 3-Connecting Bolt, 4-Pressure Plate, 5-Connecting Bolt Assembly, 6-Half Coupling II, 7-Elastic Block, 8-Bolt Assembly. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Referring to the illustration, this embodiment provides a non-disassembly, easily replaceable flexible coupling, used for connecting the power unit and the crushing shaft assembly of an underground crusher, including:

[0024] Half-coupling 1 and half-coupling 2 6 are connected by an elastic block 7 to transmit torque.

[0025] The outer fixed sleeve assembly 2 is composed of two sets of semi-circular sleeves spliced ​​together by connecting bolts 3 to form an annular sleeve, and is installed on the half coupling 1 by bolt assembly 8, which is used to restrict the elastic block 7 from moving radially outward;

[0026] The pressure plate 4 is fixed inside the half coupling 1 and is connected to the output shaft end of the sprocket shaft assembly via the connecting bolt assembly 5. It is used to restrict the elastic block 7 from moving radially inward.

[0027] Furthermore, the two sets of semicircular sleeves of the outer fixing sleeve assembly 2 form a detachable annular sleeve structure through the connecting bolts 3. The connecting bolt assembly generally consists of bolts and loosening washers, and the reliability of the connection can be further improved by applying thread-locking adhesive to prevent loosening.

[0028] Furthermore, the pressure plate 4 is detachably connected to the output shaft end of the sprocket shaft assembly via the connecting bolt assembly 5.

[0029] Furthermore, the mating end faces of the first half-coupling 1 and the second half-coupling 6 are formed with grooves that cooperate with the elastic block 7.

[0030] The elastic block 7 has a columnar structure, and each elastic block 7 is embedded in the groove formed by the mating end faces of the half coupling 1 and the half coupling 2.

[0031] Furthermore, the bolt assembly 8 is a fastening bolt that passes through the outer fixing sleeve assembly 2 and is threadedly connected to the half coupling 1, and a positioning pin is provided between the outer fixing sleeve assembly 2 and the half coupling 1.

[0032] Furthermore, a wear-resistant lining is provided between the inner wall of the outer fixing sleeve assembly 2 and the outer peripheral surface of the elastic block 7, and the thickness of the wear-resistant lining is 1-3mm.

[0033] Furthermore, when replacing the elastic block 7, only the outer fixing sleeve assembly 2 and the pressure plate 4 need to be removed to directly disassemble and replace the elastic block 7, without disassembling the power unit and half coupling 1 and half coupling 2 6.

[0034] Working principle:

[0035] The torque of the underground crusher's power unit (such as the motor) is input through half-coupling 1, transmitted to half-coupling 6 via elastic block 7, and then output to the crusher shaft assembly by half-coupling 6, thus realizing power transmission.

[0036] Here, the elastic block 7 serves as the core medium for torque transmission. Its columnar structure is embedded in the corresponding slots on the end faces of half-coupling 1 and half-coupling 6, absorbing impact and vibration through elastic deformation to achieve smooth transmission.

[0037] In addition, the outer fixed sleeve assembly 2 is fastened to the half coupling 1 by the bolt assembly 8 to form a ring constraint structure to prevent the elastic block 7 from flying outward under the action of centrifugal force;

[0038] The pressure plate 4 is fixed to the output shaft end of the sprocket shaft assembly by connecting bolts 5, which restricts the inward displacement of the elastic block 7 from the inside.

[0039] This bidirectional limiting mechanism ensures that the elastic block 7 maintains a stable radial position during high-speed rotation, preventing torque transmission failure due to displacement.

[0040] When the elastic block needs to be replaced.

[0041] First, loosen the connecting bolt 3 and remove the outer fixing sleeve assembly 2; directly remove the failed elastic block 7 from the groove formed by the end faces of half coupling 1 and half coupling 2, and replace it with a new one;

[0042] Then, reinstall the outer fixing sleeve assembly 2 and tighten the bolts. The entire process does not require disassembling the power unit and the half coupling, greatly reducing operation time.

[0043] In the above embodiments and working principles, this patent has the following advantages over traditional couplings:

[0044] With the inner and outer limiting structure of the outer fixed sleeve assembly 2 and the pressure plate 4, the elastic block 7 can be directly disassembled and replaced by simply removing the outer fixed sleeve assembly 2 during daily maintenance. There is no need to move the power unit and the half coupling, which shortens the replacement time to less than 30 minutes, significantly reduces the downtime of the underground equipment, and avoids the delay in coal mining progress caused by the replacement of parts.

[0045] The outer fixing sleeve assembly 2 consists of two sets of semi-circular sleeves spliced ​​together by connecting bolts 3 to form an annular sleeve, which is fixed to the half coupling 1 by bolt assembly 8, tightly wrapping the outer periphery of the elastic block 7 and restricting its radial outward movement; as a further extension of the technology, the contact position between the outer fixing sleeve assembly and the half coupling can be designed to be dustproof and waterproof, such as adding a sealing ring when tightening the outer fixing sleeve, to prevent dust and moisture from entering the elastic block groove or bolt connection part in the humid and dusty environment downhole, which may cause corrosion or jamming.

[0046] The pressure plate 4 is fixed to the output shaft end of the sprocket shaft assembly by the connecting bolt assembly 5, forming an inner ring limiting structure, which abuts against the inner ring of the elastic block 7 to prevent it from moving radially inward.

[0047] This dual-directional limiting design ensures that the elastic block 7 maintains precise positioning during high-speed transmission, avoiding torque transmission failure or increased equipment vibration due to displacement, and extending the service life of the coupling.

[0048] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be covered within the protection scope of this utility model.

[0049] Furthermore, it should be understood in the description of this utility model that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A non-disassembly, easily replaceable flexible coupling, used for connecting the power unit and the crushing shaft assembly of an underground crusher, characterized in that... include: Half-coupling one (1) and half-coupling two (6), wherein the torque is transmitted through an elastic block (7); The external fixed sleeve assembly (2) is formed by splicing two sets of semicircular sleeves into an annular sleeve by connecting bolts (3), and is installed on the half coupling (1) by bolt assembly (8) to restrict the elastic block (7) from moving outward in the radial direction; The pressure plate (4) is fixedly installed inside the half coupling (1). The pressure plate (4) is connected to the output shaft end of the sprocket shaft assembly via the connecting bolt assembly (5) to restrict the elastic block (7) from moving radially inward.

2. The easy-to-replace flexible coupling without disassembly according to claim 1, characterized in that: The two sets of semicircular sleeves of the external fixing sleeve assembly (2) are connected by connecting bolts (3) to form a detachable annular sleeve structure.

3. The easy-to-replace flexible coupling without disassembly according to claim 1, characterized in that: The pressure plate (4) is detachably connected to the output shaft end of the sprocket shaft assembly via a connecting bolt assembly (5).

4. The easy-to-replace flexible coupling without disassembly according to claim 1, characterized in that: The mating end faces of the first half-coupling (1) and the second half-coupling (6) are formed with grooves that cooperate with the elastic block (7); The elastic block (7) has a columnar structure, and each elastic block (7) is embedded in the groove formed by the mating end faces of the first half coupling (1) and the second half coupling (6).

5. The non-disassembly and easily replaceable flexible coupling according to claim 1, characterized in that: The bolt assembly (8) is a fastening bolt that passes through the outer fixing sleeve assembly (2) and is threadedly connected to the half coupling (1), and a positioning pin is provided between the outer fixing sleeve assembly (2) and the half coupling (1).

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