Snake-shaped spring coupling capable of being quickly disassembled and assembled

Abstract

The utility model relates to the technical field of couplings, and discloses a quick disassembly and assembly snake-shaped spring coupler which comprises a housing and a snake-shaped spring installed in the housing, half couplings used for being in butt joint with the snake-shaped spring are installed at the two ends of the housing, and shaft connecting taper sleeves are installed at the free ends of the half couplings. A fastener with a screw end is arranged on the end surface of one side, butted with the serpentine spring, of the half coupling; the shaft connecting taper sleeve is movably sleeved in the free end of the coupling half and is locked through the screw rod end of the fastener; threaded holes matched with the fastening pieces are formed in the end faces of the sides, in butt joint with the serpentine springs, of the half couplings, openings in one ends of the threaded holes are attached to the end faces of the shaft connecting taper sleeves, the fastening pieces can be detached, and the shaft connecting taper sleeves can be ejected out of the half couplings through the threaded holes. According to the utility model, the disassembly and assembly process is greatly simplified, and the disassembly and assembly time is saved, so that the downtime of equipment is reduced, the production efficiency is improved, and the economic loss caused by the downtime of the equipment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically a quick-release serpentine spring coupling. Background Technology

[0002] Snake spring couplings, also known as serpentine spring couplings, are widely used in various mechanical transmission systems in large factory production lines, such as connections between motors and reducers, and power transmission for large fans. Taking a large chemical plant's production workshop as an example, the workshop contains multiple large production lines, each equipped with numerous devices using snake spring couplings to ensure efficient power transmission between them. In this large-scale, high-intensity production environment, the problems with traditional snake spring couplings regarding the disassembly and assembly of half-couplings and tapered sleeves are amplified, significantly impacting production.

[0003] During routine maintenance and repair of equipment, traditional serpentine spring couplings require the use of tools such as pullers to separate the half-coupling and the tapered sleeve, a very cumbersome operation. For example:

[0004] In a chemical production workshop, the motor and reducer of a large mixing equipment are connected by a serpentine spring coupling. When the motor or reducer malfunctions and needs to be repaired or replaced, the serpentine spring coupling needs to be disassembled. Due to the large size of the equipment and the narrow surrounding space, when using a puller to disassemble the half coupling, not only does it require professional technicians to operate, but it also takes a lot of time to adjust the position and angle of the puller to ensure that it can properly lock the coupling hub for disassembly. The entire disassembly process may take several hours or even longer. During this time, the production line must be stopped, resulting in production interruption and huge economic losses.

[0005] Chemical production is usually a continuous process, and increased equipment downtime directly affects product output. The difficulty in disassembling serpentine spring couplings can lead to prolonged production line downtime, resulting in significant economic losses. Furthermore, frequent and prolonged downtime can disrupt production plans, affect on-time product delivery, and may expose companies to default risks, further damaging their economic benefits and market reputation.

[0006] During disassembly using tools such as pullers, improper operation or issues with the fit between the tool and components can easily damage parts such as drive shafts and half-couplings. For example, pulling a half-coupling hub may leave scratches on the surface of the shaft and the half-coupling shaft hole, affecting the fit accuracy between the hole and the shaft. This can lead to loosening, vibration, and other problems during subsequent installation and use, reducing the operational stability and reliability of the equipment. Once these problems occur during equipment operation, they will not only affect product quality but may also cause more serious equipment failures, increase maintenance costs and downtime, creating a vicious cycle.

[0007] Based on the above problems, the inventors proposed a quick-release serpentine spring coupling. Utility Model Content

[0008] To address the technical problems existing in the background art, this utility model proposes a quick-assembly and disassembly serpentine spring coupling.

[0009] The present invention proposes a quick-release serpentine spring coupling, including a housing and a serpentine spring installed inside the housing. Both ends of the housing are equipped with half couplings for engaging the serpentine spring. The free end of the half coupling is equipped with a shaft connecting tapered sleeve. The end face of the half coupling that engages with the serpentine spring is provided with a fastener with a screw end.

[0010] The shaft connecting tapered sleeve is movably fitted into the free end of the half coupling and locked by the screw end of the fastener; the half coupling has a threaded hole adapted to the fastener on the end face that mates with the serpentine spring, and one end of the threaded hole is in contact with the end face of the shaft connecting tapered sleeve, so that the fastener can be removed and the shaft connecting tapered sleeve can be pushed out of the half coupling through the threaded hole.

[0011] By installing a fastener with a screw end on the end face where the half-coupling meets the serpentine spring, the installation and disassembly process of the shaft connection tapered sleeve is greatly simplified. During installation, the shaft connection tapered sleeve is fitted into the free end of the half-coupling, and the screw end of the fastener is used to lock it, ensuring a firm connection. During disassembly, simply remove the fastener from its original installation position and insert it into the threaded hole. As the fastener is gradually screwed in, its screw end will push the shaft connection tapered sleeve, causing it to be pushed out of the half-coupling. This design eliminates the need for additional complex tools, such as pullers, greatly saving disassembly and assembly time, reducing equipment downtime, thereby improving production efficiency and reducing economic losses caused by equipment downtime.

[0012] As a further optimization of this utility model, the fastener is a cup head bolt. The half coupling has a through hole adapted to the cup head bolt on one end face that is connected to the serpentine spring. The shaft connecting tapered sleeve has a bolt hole on one end face near the half coupling. The screw end of the cup head bolt passes through the through hole and is threadedly connected to the bolt hole.

[0013] Fasteners can also be a combination structure of a screw and different head components, such as the screw head having other limiting structures or other shapes, etc.

[0014] The cup-head bolt was chosen as the fastener because bolt connections have advantages such as simple structure, reliable connection, and convenient assembly and disassembly. The through hole on the half-coupling matches the cup-head bolt, ensuring that the bolt can pass through smoothly. The bolt hole on the shaft connection tapered sleeve is threaded to the screw end of the cup-head bolt. When tightening the cup-head bolt, the screw end will tightly fix the shaft connection tapered sleeve in the free end of the half-coupling. This connection method is not only easy to operate, but also provides sufficient tightening force to ensure that the shaft connection tapered sleeve and the half-coupling will not loosen during equipment operation, thus ensuring the normal operation of the coupling.

[0015] As a further optimization of this utility model, the bolt holes and threaded holes are staggered, and the axes of the cup head bolt, through hole, and bolt hole coincide.

[0016] The staggered distribution of bolt holes and threaded holes avoids structural interference between the two, ensuring that the structural strength of the half-coupling is not affected. At the same time, the coincidence of the axes of the cup head bolt, through hole, and bolt hole ensures that the force can be evenly applied to the shaft connecting tapered sleeve during tightening and loosening of the cup head bolt, making the shaft connecting tapered sleeve more securely fixed in the half-coupling. During equipment operation, this layout can effectively withstand large torque and axial force, reduce equipment failures caused by loose connections, and improve the reliability and stability of the coupling.

[0017] As a further optimization of this utility model, there are multiple through holes, which are evenly distributed around the end face of the half coupling, and a cup head bolt is provided in each through hole.

[0018] Multiple through holes are evenly distributed circumferentially along the end face of the half coupling, and a cup-head bolt is installed in each through hole. This design further enhances the connection strength between the shaft connecting tapered sleeve and the half coupling. The multiple cup-head bolts are evenly distributed around the shaft connecting tapered sleeve, which can more evenly bear torque and axial force, avoiding connection failure caused by excessive force at a single point. During equipment operation, even if subjected to large impacts or vibrations, the combined action of multiple bolts can ensure that the shaft connecting tapered sleeve and the half coupling always maintain a tight connection, improving the load-bearing capacity and stability of the coupling.

[0019] As a further optimization of this utility model, a countersunk hole adapted to the head of the cup head bolt is provided on the end face of the half coupling that connects with the serpentine spring. The countersunk hole is located around the through hole, and the depth of the countersunk hole is greater than the height of the head of the cup head bolt.

[0020] On the one hand, the head of the cup bolt can be completely sunk into the countersunk hole, keeping the end face of the half coupling flat and improving the overall aesthetics of the coupling. On the other hand, the countersunk hole can protect the head of the cup bolt, preventing it from being hit or worn during equipment operation, extending the service life of the cup bolt, and thus ensuring the reliability of the coupling connection.

[0021] As a further optimization of this utility model, the side of the countersunk hole near the inner ring of the half coupling is set as an opening to meet the requirements of the center circle size of the countersunk hole and the bolt hole and the maximum hole limit of the shaft connection tapered sleeve.

[0022] The countersunk hole has an opening near the inner ring of the half-coupling. This is to better accommodate the size requirements of the shaft connection tapered sleeve and bolt holes while meeting structural strength requirements. In actual production and installation, the maximum diameter of the shaft connection tapered sleeve and the center circle size of the bolt holes need to be considered. The opening design can provide more space for the installation of the shaft connection tapered sleeve without affecting the protection of the countersunk hole on the head of the cup bolt, ensuring the assembly accuracy and compatibility between the components, and making the structure of the coupling more compact and reasonable.

[0023] As a further optimization of this utility model, the free end of the half coupling is provided with an assembly hole that is adapted to the shaft connecting tapered sleeve. The inner diameter of the assembly hole gradually increases from the inside of the cover to the outside to adapt to the outer peripheral tapered surface of the shaft connecting tapered sleeve.

[0024] The inner diameter of the mounting hole at the free end of the half-coupling gradually increases from the inside of the housing to the outside, matching the outer conical surface of the shaft connecting tapered sleeve. This conical surface fit structure has many advantages. When installing the shaft connecting tapered sleeve, the gradually increasing inner diameter facilitates the insertion of the shaft connecting tapered sleeve, reducing the installation difficulty. Moreover, when the cup head bolt is tightened, the shaft connecting tapered sleeve will fit tightly against the conical surface of the mounting hole of the half-coupling under the action of axial force, generating greater friction, further enhancing the connection stability between the two, improving the transmission performance of the coupling, and ensuring the reliability of power transmission.

[0025] As a further optimization of this utility model, the inner wall of the shaft connecting tapered sleeve has a keyway, mainly to facilitate key connection with the transmission shaft. In practical applications, the presence of the keyway enables the shaft connecting tapered sleeve to quickly and accurately engage with various keyed transmission shafts, meeting the connection requirements of different equipment and improving the versatility of the coupling. Whether it is a motor shaft, a reducer shaft, or other types of transmission shafts, they can all be engaged with the keyway of the shaft connecting tapered sleeve through the key to achieve stable power transmission, thus expanding the application range of the coupling.

[0026] As a further optimization of this utility model, the end of the half coupling away from the shaft connecting tapered sleeve has circumferentially evenly distributed tooth grooves, and the serpentine spring is axially embedded in the tooth grooves to complete the docking.

[0027] The circumferentially evenly distributed toothed grooves at the end of the half-coupling away from the shaft connecting tapered sleeve facilitate the installation of the serpentine spring. The serpentine spring is axially embedded in the toothed grooves. This installation method is simple and quick, ensuring the stability of the serpentine spring during torque transmission. During equipment operation, the toothed grooves and the serpentine spring fit tightly together, enabling torque to be transmitted evenly, reducing uneven force on the serpentine spring, improving the working efficiency of the coupling, and ensuring the normal operation of the equipment.

[0028] As a further optimization of this utility model, the cover is wrapped around the two half-couplings at their close ends and fixed by locking bolts, providing effective protection. During equipment operation, the cover prevents dust, debris, and other contaminants from entering the coupling, avoiding wear on the serpentine spring and the connection parts of the half-couplings, thereby extending the service life of the coupling. At the same time, the cover also provides some protection for internal components, preventing damage from accidental collisions, ensuring the normal operation of the coupling, and improving the reliability of the equipment.

[0029] The quick-release serpentine spring coupling proposed in this utility model has the following beneficial effects:

[0030] By installing a fastener with a screw end on the end face where the half-coupling meets the serpentine spring, the shaft connecting tapered sleeve is locked inside the free end of the half-coupling by the screw end of the fastener. During disassembly, simply remove the fastener, insert it into the threaded hole, and as the fastener is gradually pushed, the shaft connecting tapered sleeve can be pushed out of the half-coupling. No additional complicated tools are required, which greatly simplifies the disassembly and assembly process, saves disassembly and assembly time, thereby reducing equipment downtime, improving production efficiency, and reducing economic losses caused by equipment downtime.

[0031] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] Figure 1 This is an overall exploded view of the present invention;

[0033] Figure 2 This is an assembly diagram of the present invention;

[0034] Figure 3 This utility model Figure 2 A schematic diagram of the cross-sectional structure;

[0035] Figure 4 This is a schematic diagram of the assembly of the half-coupling and the tapered sleeve of this utility model;

[0036] Figure 5This is an exploded view of the half-coupling and tapered sleeve of this utility model.

[0037] Figure descriptions: 1. Cover; 2. Snake spring; 3. Half coupling; 4. Shaft connecting tapered sleeve; 5. Bolt; 6. Bolt hole; 7. Threaded hole; 8. Through hole; 9. Countersunk hole. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] In the field of coupling technology, traditional serpentine spring couplings suffer from cumbersome operation in terms of disassembling and assembling the half coupling and tapered sleeve, which seriously affects the efficiency of equipment inspection and maintenance. This utility model's quick-disassembly serpentine spring coupling addresses this pain point with an innovative design, and its specific implementation is as follows:

[0041] like Figures 1-4 As shown, the coupling mainly consists of a housing 1, a serpentine spring 2, a half coupling 3, and a shaft connecting tapered sleeve 4;

[0042] The cover 1 is placed over the two half-couplings 3 at their close ends and is fixed by locking bolts. This provides protection for the internal components, prevents dust and debris from entering, avoids component wear, and extends the service life of the coupling.

[0043] The serpentine spring 2 is installed inside the housing 1. Its function is to transmit torque and ensure that power is transmitted smoothly between the two half-couplings 3.

[0044] The half-coupling 3 is located at both ends of the housing 1, with one end connected to the serpentine spring 2 and the other end installed with the shaft connecting tapered sleeve 4;

[0045] The end of the half-coupling 3 away from the shaft connecting tapered sleeve 4 has circumferentially evenly distributed toothed grooves. The serpentine spring 2 is axially embedded in these toothed grooves to complete the connection. This connection method is simple and efficient. When the equipment is running, the toothed grooves and the serpentine spring 2 are tightly matched, which can ensure uniform torque transmission, reduce uneven force on the serpentine spring 2, improve the working efficiency of the coupling, and ensure the normal operation of the equipment.

[0046] like Figure 1 and Figure 3 As shown, a fastener with a screw end is provided on the end face of the half-coupling 3 that mates with the serpentine spring 2. A cup head bolt 5 is typically used. A through hole 8 that matches the cup head bolt 5 is provided on this end face of the half-coupling 3. Multiple through holes 8 are evenly distributed around the end face. A cup head bolt 5 is installed in each through hole 8. A bolt hole 6 is provided on the end face of the shaft connecting tapered sleeve 4 near the half-coupling 3. The screw end of the cup head bolt 5 passes through the through hole 8 and is threaded into the bolt hole 6, thereby firmly installing the shaft connecting tapered sleeve 4 in the free end of the half-coupling 3.

[0047] like Figure 5 As shown, in order to optimize the structure and ensure the connection strength, the bolt hole 6 and the threaded hole 7 are staggered, and the axes of the cup head bolt 5, the through hole 8, and the bolt hole 6 are coincident. This layout not only avoids structural interference and ensures the structural strength of the half coupling 3, but also allows the force of the cup head bolt 5 to be evenly applied to the shaft connection tapered sleeve 4 during tightening and disassembly, improving the stability of the connection, effectively bearing the torque and axial force during equipment operation, and reducing equipment failure.

[0048] like Figure 5 As shown, a countersunk hole 9 is also provided on the end face of the half coupling 3 that is connected to the serpentine spring 2. The countersunk hole 9 is located outside the through hole 8 and its depth is greater than the height of the head of the cup bolt 5. The head of the cup bolt 5 is sunk into the countersunk hole 9, so that the end face of the half coupling 3 remains flat, which not only improves the aesthetics, but also protects the head of the cup bolt 5, preventing it from being hit or worn during equipment operation, and ensuring the reliability of the connection.

[0049] The countersunk hole 9 is set to be open on the side near the inner ring of the half coupling 3. This is to meet the requirements of the center circle size of the countersunk hole 9 and the bolt hole 6 as well as the maximum hole limit of the shaft connection tapered sleeve 4. Without affecting the protection of the head of the cup bolt 5, it provides more space for the installation of the shaft connection tapered sleeve 4, ensuring the assembly accuracy and compatibility between the components.

[0050] like Figure 3As shown, the free end of the half-coupling 3 has an assembly hole that matches the shaft connecting tapered sleeve 4. The inner diameter of the assembly hole gradually increases from the inside of the cover 1 outwards, matching the outer circumferential tapered surface of the shaft connecting tapered sleeve 4. This tapered surface fit structure facilitates the insertion of the shaft connecting tapered sleeve 4 during installation, reducing installation difficulty. When the cup head bolt 5 is tightened, the shaft connecting tapered sleeve 4 will fit tightly against the tapered surface of the assembly hole of the half-coupling 3 under the action of axial force, increasing friction, further enhancing connection stability, and improving the transmission performance of the coupling.

[0051] Furthermore, such as Figure 5 As shown, the inner wall of the shaft connecting tapered sleeve 4 is provided with a keyway. This design is mainly to facilitate key connection with the drive shaft. In practical applications, different equipment has various types of drive shafts. Drive shafts with keys can be connected quickly and accurately by matching the keyway of the shaft connecting tapered sleeve 4 with the key, meeting the connection needs of various equipment and greatly improving the versatility of the coupling.

[0052] When installing the shaft connecting tapered sleeve 4, first put the shaft connecting tapered sleeve 4 into the mounting hole at the free end of the half coupling 3. Since the inner diameter of the mounting hole is compatible with the outer tapered surface of the shaft connecting tapered sleeve 4, the shaft connecting tapered sleeve 4 can be inserted smoothly. Then, pass the cup head bolt 5 through the through hole 8 on the half coupling 3 and screw it into the bolt hole 6 of the shaft connecting tapered sleeve 4. Tighten the cup head bolt 5 to make the shaft connecting tapered sleeve 4 and the half coupling 3 tightly connected.

[0053] When it is necessary to disassemble the shaft connecting tapered sleeve 4, first unscrew the cup head bolt 5, which was originally used to fix the shaft connecting tapered sleeve 4, from the bolt hole 6. Then, insert the cup head bolt 5 into the threaded hole 7 on the half coupling 3 that mates with the serpentine spring 2. As the cup head bolt 5 is gradually screwed into the threaded hole 7, its screw end will extend to the outside of the threaded hole 7 and push the shaft connecting tapered sleeve 4 outward, so that the shaft connecting tapered sleeve 4 is pushed out of the half coupling 3. This design eliminates the traditional method of using complex tools such as pullers, greatly simplifies the disassembly and assembly process, saves a lot of disassembly and assembly time, reduces equipment downtime, improves production efficiency, and reduces economic losses caused by equipment downtime.

[0054] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick disassembly snake spring coupling, comprising a cover (1) and a snake spring (2) installed inside the cover (1), both ends of the cover (1) are provided with half couplings (3) for connecting the snake spring (2), and the free end of the half coupling (3) is provided with a shaft connecting taper sleeve (4), characterized in that: the side end face of the half coupling (3) connected with the snake spring (2) is provided with a fastener with a screw end, the shaft connecting taper sleeve (4) is movably sleeved in the free end of the half coupling (3) and locked by the screw end of the fastener; the side end face of the half coupling (3) connected with the snake spring (2) is provided with a threaded hole (7) matched with the fastener, and the opening end of the threaded hole (7) is attached to the end face of the shaft connecting taper sleeve (4), so that the fastener can be removed and the shaft connecting taper sleeve (4) can be pushed out of the half coupling (3) through the threaded hole (7). The fastener is a cup head bolt (5), the side end face of the half coupling (3) connected with the snake spring (2) is provided with a through hole (8) matched with the cup head bolt (5), and the side end face of the shaft connecting taper sleeve (4) close to the half coupling (3) is provided with a bolt hole (6), the screw end of the cup head bolt (5) passes through the through hole (8) and is threadedly connected with the bolt hole (6). The bolt hole (6) and the threaded hole (7) are distributed in a staggered manner, and the axes of the cup head bolt (5), the through hole (8) and the bolt hole (6) coincide.

2. The quick assembly and disassembly snake spring coupling according to claim 1, characterized in that, The number of through holes (8) is multiple, and the multiple through holes (8) are uniformly distributed along the end face of the half coupling (3), and one cup head bolt (5) is arranged in each through hole (8).

3. The quick assembly and disassembly snake spring coupling according to claim 2, characterized in that, The side end face of the half coupling (3) connected with the snake spring (2) is provided with a counterbore (9) matched with the head of the cup head bolt (5), the counterbore (9) is arranged outside the through hole (8), and the depth of the counterbore (9) is greater than the height of the head of the cup head bolt (5).

4. The quick assembly and disassembly snake spring coupling according to claim 2, characterized in that, The side of the counterbore (9) close to the inner ring of the half coupling (3) is provided as an opening to meet the maximum hole limitation requirements of the center circle size of the counterbore (9) and the bolt hole (6) and the shaft connecting taper sleeve (4).

5. The quick-disassembly snake spring coupling according to claim 2, characterized in that, The free end of the half coupling (3) is provided with a mounting hole matched with the shaft connecting taper sleeve (4), and the inner diameter of the mounting hole gradually increases from the inside of the cover (1) to the outside to adapt to the outer peripheral taper surface of the shaft connecting taper sleeve (4).

6. The quick-disassembly snake spring coupling according to claim 5, characterized in that, The inner wall of the shaft connecting taper sleeve (4) has a key groove.

7. The quick-disassembly snake spring coupling according to claim 1, characterized in that, The end of the half coupling (3) away from the shaft connecting taper sleeve (4) has circumferentially uniformly distributed tooth grooves, and the snake spring (2) is axially embedded in the tooth grooves to complete the connection.

8. The quick-disassembly snake spring coupling according to claim 1, characterized in that, The cover (1) is wrapped outside the end of the two half couplings (3) close to each other and is fixed by locking bolts.

9. The quick-disassembly snake spring coupling of claim 1, wherein, ​ 10. The quick-disassembly snake spring coupling of claim 1, wherein, ​

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