Elastic coupling

Abstract

The utility model relates to the technical field of couplings, in particular to an elastic coupler which comprises a main shaft sleeve and an auxiliary shaft sleeve, shaft sleeve accessories are arranged on the main shaft sleeve and the auxiliary shaft sleeve, each shaft sleeve accessory comprises a connecting arc plate, the connecting arc plates are arranged at one ends of the two shaft sleeves, and the connecting arc plates of the two shaft sleeves are oppositely arranged. A hard buffer assembly is arranged between the connecting arc plates of the two shaft sleeves and comprises buffer rubber. A first buffer ring and a second buffer ring are coaxially arranged at the opposite ends of the main shaft sleeve and the auxiliary shaft sleeve, the first buffer ring is connected with a connecting arc plate on the auxiliary shaft sleeve, and the second buffer ring is connected with a connecting arc plate on the main shaft sleeve. And an elastic piece is arranged between the buffer ring I and the buffer ring II. According to the utility model, the technical problem that the elastic coupling can transmit large torque while performing elastic compensation is solved.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, and more specifically, to a flexible coupling. Background Technology

[0002] A coupling is a device that connects two shafts or a shaft and a rotating component, allowing them to rotate together during the transmission of motion and power without disengaging. It is a key component in mechanical transmission systems. Couplings can transmit torque and rotational motion between two shafts, ensuring a smooth transfer of power from the driving end to the driven end and guaranteeing the normal operation of mechanical equipment.

[0003] When existing couplings are used for flexible coupling, spring couplings or rubber pads are generally added to the connection parts of the couplings to achieve elastic damping and compensate for misalignment. However, the elastic displacement of spring couplings is too large, so they can only be used for couplings with small torque. Couplings with rubber pads have a weak elastic effect, which increases torque transmission but loses too much elastic displacement, thus having certain limitations.

[0004] A Chinese utility model patent, titled "Elastic Coupling" and with publication number CN211039441U, includes two flanges. An input flange connects to an input shaft, and an output flange connects to an output shaft. A connecting flange is positioned between the two flanges, and connecting components connect the connecting flange to both the input and output flanges. This utility model utilizes springs with different elastic coefficients for adjustable elasticity. It also allows for a change from an elastic to a fixed connection without disassembling the coupling, making it convenient to use.

[0005] Although this utility model can adjust the elasticity, when the coupling transmits torque, it relies entirely on the spring force. During use, sudden changes in torque can easily damage the internal connecting components, limiting its application scenarios. Utility Model Content

[0006] The purpose of this application is to provide a flexible coupling that solves the technical problem of transmitting a large torque while performing elastic compensation.

[0007] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0008] A flexible coupling includes a main bushing and a secondary bushing.

[0009] Preferably, both the main bushing and the auxiliary bushing are provided with bushing accessories, the bushing accessories including connecting arc plates, the connecting arc plates are disposed at one end of the two bushings, and the connecting arc plates of the two bushings are arranged facing each other.

[0010] Preferably, a rigid buffer assembly is provided between the connecting arc plates of the two bushings, and the rigid buffer assembly includes buffer rubber.

[0011] Preferably, buffer ring one and buffer ring two are coaxially arranged at the opposite ends of the main bushing and the secondary bushing. Buffer ring one is connected to the connecting arc plate on the secondary bushing, and buffer ring two is connected to the connecting arc plate on the main bushing.

[0012] Preferably, an elastic element is provided between the first buffer ring and the second buffer ring.

[0013] Preferably, the main bushing and the secondary bushing are also provided with fixing components.

[0014] Preferably, the fixing component includes a fixing bolt that passes through the arc surface of the connecting arc plate. The connecting arc plate has a through hole, and the fixing bolt is slidably disposed in the through hole. The sliding direction is perpendicular to the axial direction of the two bushings.

[0015] Preferably, the fixing bolt passes through the side of the corresponding buffer ring one or buffer ring two, and the side of buffer ring one and buffer ring two are provided with threaded holes, and the threaded end of the fixing bolt is matched and connected with the corresponding threaded hole.

[0016] Preferably, the elastic element includes a spring, one end of which is fixed to the ring surface of the first buffer ring, and the other end of which is fixed to the ring surface of the second buffer ring.

[0017] Preferably, the elastic element further includes a limiting post and a limiting hole. The limiting post is fixed on the ring surface of the first buffer ring, and the limiting hole is disposed through the ring surface of the second buffer ring. The limiting post is slidably disposed in the limiting hole, and the sliding direction is consistent with the axial direction of the two bushings.

[0018] Preferably, the diameter of the limiting hole is larger than the diameter of the limiting post.

[0019] Preferably, the rigid buffer assembly further includes a sliding groove, which is respectively disposed on the outer wall of the main bushing and the secondary bushing. A buffer rubber is slidably disposed in the sliding groove, and the sliding direction of the buffer rubber is consistent with the axial direction of the two bushings.

[0020] Preferably, one end of the buffer rubber is provided with a displacement driving component, which is mounted on the corresponding main bushing or secondary bushing.

[0021] The technical solution of this application has at least the following advantages and beneficial effects:

[0022] In this invention, by setting up an elastic element and a rigid buffer assembly, when transmitting a small torque, only the elastic element performs elastic damping and compensates for displacement; when transmitting a large torque, after the elastic element deforms to a certain extent, the rigid buffer assembly will begin to apply elastic force, increase the elastic force of the coupling, and ensure the normal use of the elastic element and the coupling.

[0023] In this utility model, by setting a limiting post and a limiting hole, when the elastic end of the elastic element and the rigid buffer component fail, in order to ensure the normal operation of the coupling at this time, the rigid contact of the limiting post and the limiting hole is used to improve the stability of the coupling connection, and to prevent the coupling from suddenly breaking and rupturing during operation due to its inability to bear torque, thus endangering the workers in the external environment, and ensuring that the workers in the external environment can safely perform maintenance and replacement of the coupling.

[0024] In this invention, by setting a fixing component, the connection end of the coupling can be changed from an elastic connection to a fixed connection, thereby increasing the application range of the coupling. Attached Figure Description

[0025] Figure 1 This is a front view structural diagram of the present invention.

[0026] Figure 2 This is a cross-sectional structural diagram of the elastic element in this utility model.

[0027] Figure 3 This is a cross-sectional view of the rigid buffer component in this utility model.

[0028] Figure 4 This is a schematic diagram of the structure of this utility model.

[0029] Figure 5 This is a cross-sectional view of the fixing component in this utility model.

[0030] Figure 6 This is a cross-sectional view of the fixing component in this utility model from another angle.

[0031] In the diagram: 1-Main shaft sleeve, 2-Secondary shaft sleeve, 3-Buffer ring one, 4-Elastic element, 401-Spring, 402-Limiting post, 403-Limiting hole, 5-Buffer ring two, 6-Rigid buffer assembly, 601-Buffer rubber, 602-Slide groove, 603-Adjusting bolt, 7-Fixing assembly, 701-Fixing bolt, 702-Through hole, 703-Threaded hole, 8-Shaft sleeve accessory, 801-Connecting arc plate, 802-Slotted, 803-Fixing hole. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Example

[0035] Please refer to Figures 1-6 This utility model provides an elastic coupling, including a main bushing 1, a secondary bushing 2, a buffer ring 1 3, an elastic element 4, a buffer ring 2 5, a rigid buffer assembly 6, a fixing assembly 7, and a bushing accessory 8.

[0036] Furthermore, the main shaft sleeve 1 and the auxiliary shaft sleeve 2 are used to connect the drive shaft and driven shaft of the external equipment, respectively, to realize the transmission of torque.

[0037] Both the main bushing 1 and the auxiliary bushing 2 are equipped with bushing accessories 8 to ensure that the shaft of the external equipment can be fixed on the bushing.

[0038] Please refer to Figure 4 In this embodiment, the bushing accessory 8 includes a connecting arc plate 801, a slot 802, and a fixing hole 803.

[0039] Specifically, the main bushing 1 and the auxiliary bushing 2 have slots running through them along the axial direction of the bushing. One end of the slot is a groove 802, which is located at one end of the bushing. Fixing holes 803 are running through both sides of the groove 802 for inserting bolts. When the bolts are manually tightened, the grooves 802 on the bushing are subjected to a locking force from the bolts. The spacing between the grooves 802 becomes smaller, which makes the diameter of the shaft hole inside the bushing smaller, making it easier to fix the shaft of the external equipment fitted inside the shaft hole.

[0040] In addition, the connecting arc plate 801 is fixedly installed at one end of the two bushings, and the connecting arc plates 801 of the two bushings are arranged facing each other at the connection end of the two bushings. When the two bushings are connected together, there will be a gap between the connecting arc plates 801 of the two bushings, which facilitates the installation of subsequent components.

[0041] Furthermore, a rigid buffer assembly 6 is provided between the connecting arc plates 801 of the two bushings, and the elastic displacement of the buffer end in the rigid buffer assembly 6 is small when subjected to force.

[0042] At the opposing ends of the main bushing 1 and the secondary bushing 2, buffer ring 3 and buffer ring 5 are coaxially arranged. Buffer ring 3 is connected to the connecting arc plate 801 on the secondary bushing 2, and buffer ring 5 is connected to the connecting arc plate 801 on the main bushing 1. An elastic element 4 is arranged between buffer ring 3 and buffer ring 5. The elastic displacement of the elastic element 4 when subjected to force is greater than that of the rigid buffer assembly 6.

[0043] Preferably, when the two bushings are connected and fixed to the shaft of the external device, and the shaft is rotated, the drive shaft of the external device preferably drives the main bushing 1 to rotate first. The main bushing 1 drives the buffer ring 5 to rotate. The elastic element 4 is subjected to force and elastic deformation and begins to exert force on the buffer ring 3 and the secondary bushing 2 at the other end. However, the secondary bushing 2 will not rotate if the elastic force does not overcome the frictional resistance from the secondary bushing 2 and the driven shaft.

[0044] During this period, the rigid buffer component 6 outside the main shaft sleeve 1 will rotate and gradually come into contact with the side wall of the connecting arc plate 801 of the secondary shaft sleeve 2, applying an elastic force to the secondary shaft sleeve 2 until the secondary shaft sleeve 2 starts to rotate. The rigid buffer component 6 is to prevent the elastic deformation of the elastic element 4 from being too large, which would cause the elastic element 4 to lose its elastic effect after multiple uses.

[0045] Furthermore, the main shaft sleeve 1 and the auxiliary shaft sleeve 2 are respectively provided with fixing components 7, which can fix the main shaft sleeve 1 and the auxiliary shaft sleeve 2 together, so that the entire coupling is changed from a flexible coupling to a fixed coupling.

[0046] Please refer to Figure 4 and Figure 5 In this embodiment, the fixing component 7 includes a fixing bolt 701, a through hole 702, and a threaded hole 703.

[0047] Specifically, the fixing bolt 701 passes through the arc surface of the connecting arc plate 801, and the connecting arc plate 801 has a through hole 702. The fixing bolt 701 is slidably disposed in the through hole 702, and the sliding direction is perpendicular to the axial direction of the two bushings. The fixing bolt 701 passes through the side of the corresponding buffer ring 3 or buffer ring 5. The side of the buffer ring 3 and buffer ring 5 are provided with threaded holes 703, and the threaded end of the fixing bolt 701 is matched and connected with the corresponding threaded hole 703.

[0048] When the flexible coupling is in operation, the threaded end of the fixing bolt 701 is not connected to the threaded holes 703 of buffer ring 3 and buffer ring 5, so that one connecting arc plate 801 is connected to only one buffer ring. However, when the fixed coupling is in operation, the threaded end of the fixing bolt 701 will be matched and connected to the threaded holes 703 of buffer ring 3 and buffer ring 5, so that each connecting arc plate 801 is connected to buffer ring 3 and buffer ring 5, thereby fixing the connecting arc plates 801 of the main shaft sleeve 1 and the secondary shaft sleeve 2 together, forming a fixed coupling.

[0049] Furthermore, the elastic element 4 elastically connects the two buffer rings and applies an elastic force to the buffer rings.

[0050] Please refer to Figure 2 In this embodiment, the elastic element 4 includes a spring 401, a limiting post 402, and a limiting hole 403.

[0051] Specifically, one end of spring 401 is fixed to the ring surface of buffer ring 3, and the other end of spring 401 is fixed to the ring surface of buffer ring 5. When the two shafts in the bushing rotate together, a displacement will occur, and spring 401 can elastically extend and retract to offset the displacement along the axial direction of the bushing, and spring 401 can elastically bend to offset the displacement perpendicular to the axial direction of the bushing.

[0052] In addition, the limiting post 402 is fixed on the ring surface of the buffer ring 3, and the limiting hole 403 is disposed through the ring surface of the buffer ring 5. The limiting post 402 is slidably disposed in the limiting hole 403, and the sliding direction is consistent with the axial direction of the two bushings. The diameter of the limiting hole 403 is larger than the diameter of the limiting post 402.

[0053] Preferably, during normal operation of the coupling, the limiting post 402 will move relative to the buffer ring 5 and its limiting hole 403 along with the buffer ring 3. However, the limiting post 402 will never touch or abut against the inner wall of the limiting hole 403. Only when the spring 401 fails and the buffer end of the rigid buffer assembly 6 is damaged, resulting in insufficient elastic force at the connection end of the two bushings to overcome the frictional resistance between the secondary bushing 2 and the driven shaft, will the limiting post 402 urgently abut against the inner wall of the limiting hole 403. This ensures the normal use of the coupling and prevents sudden breakage, thus ensuring the safety of personnel in the external environment. While maintaining normal coupling operation, the rigid contact between the limiting post 402 and the limiting hole 403 will produce a loud abnormal noise, alerting nearby personnel to stop the coupling and perform maintenance or replacement.

[0054] Furthermore, rigid buffers are used to provide elastic cushioning for the coupling function of the two bushings.

[0055] Please refer to Figure 3 and Figure 4 In this embodiment, the rigid buffer assembly 6 includes a buffer rubber 601, a groove 602, and an adjusting bolt 603.

[0056] Specifically, the slide grooves 602 are respectively set on the outer walls of the main bushing 1 and the secondary bushing 2. The buffer rubber 601 is slidably arranged in the slide grooves 602. The sliding direction of the buffer rubber 601 is consistent with the axial direction of the two bushings. One end of the buffer rubber 601 is provided with a displacement driving component to drive the buffer rubber 601 to slide. The displacement driving component is set on the corresponding main bushing 1 or secondary bushing 2.

[0057] The displacement drive component is set as an adjusting bolt 603. The adjusting bolt 603 passes through the outside of the corresponding bushing and is threadedly connected to the bushing. The threaded end of the adjusting bolt 603 is rotatably connected to the buffer rubber 601. When the adjusting bolt 603 is manually turned, the buffer rubber 601 can be driven to slide.

[0058] Preferably, when the bushings are initially coupled together and the drive shaft is started, the two sides of the buffer rubber 601 will abut against the side of the connecting arc plate 801 of the other corresponding bushing and apply an elastic force. Furthermore, the distance between the other end of the buffer rubber 601 and the end face of the other corresponding bushing can be adjusted by the adjusting bolt 603, thereby ensuring that when the spring 401 performs elastic expansion and contraction displacement in the axial direction of the bushing, when the expansion and contraction reaches a specified distance, the buffer rubber 601 will abut against the end face of the other bushing and apply an elastic force, thus avoiding excessive stress on the spring 401.

[0059] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. A flexible coupling, comprising a main bushing (1) and a secondary bushing (2), characterized in that... ； Both the main bushing (1) and the secondary bushing (2) are provided with bushing accessories (8). The bushing accessories (8) include connecting arc plates (801). The connecting arc plates (801) are provided at one end of the two bushings, and the connecting arc plates (801) of the two bushings are arranged facing each other. A rigid buffer assembly (6) is provided between the connecting arc plates (801) of the two bushings, and the rigid buffer assembly (6) includes buffer rubber (601); The main bushing (1) and the secondary bushing (2) are coaxially provided with a buffer ring one (3) and a buffer ring two (5) at their opposite ends. The buffer ring one (3) is connected to the connecting arc plate (801) on the secondary bushing (2), and the buffer ring two (5) is connected to the connecting arc plate (801) on the main bushing (1). An elastic element (4) is provided between the first buffer ring (3) and the second buffer ring (5).

2. The flexible coupling according to claim 1, characterized in that, The main bushing (1) and the secondary bushing (2) are also respectively provided with fixing components (7); The fixing component (7) includes a fixing bolt (701), which passes through the arc surface of the connecting arc plate (801). The connecting arc plate (801) has a through hole (702), and the fixing bolt (701) is slidably disposed in the through hole (702). The sliding direction is perpendicular to the axial direction of the two bushings. The fixing bolt (701) passes through the side of the corresponding buffer ring one (3) or buffer ring two (5). Both buffer ring one (3) and buffer ring two (5) have threaded holes (703) on their sides. The threaded end of the fixing bolt (701) is matched and connected with the corresponding threaded hole (703).

3. The flexible coupling according to claim 1, characterized in that, The elastic element (4) includes a spring (401), one end of which is fixed on the ring surface of the first buffer ring (3), and the other end of which is fixed on the ring surface of the second buffer ring (5).

4. The flexible coupling according to claim 1, characterized in that, The elastic element (4) also includes a limiting post (402) and a limiting hole (403). The limiting post (402) is fixed on the ring surface of the first buffer ring (3), and the limiting hole (403) is disposed through the ring surface of the second buffer ring (5). The limiting post (402) is slidably disposed in the limiting hole (403), and the sliding direction is consistent with the axial direction of the two bushings.

5. The flexible coupling according to claim 4, characterized in that, The diameter of the limiting hole (403) is larger than the diameter of the limiting post (402).

6. The flexible coupling according to claim 1, characterized in that, The rigid buffer assembly (6) further includes a groove (602), which is respectively provided on the outer wall of the main bushing (1) and the secondary bushing (2). A buffer rubber (601) is slidably provided in the groove (602), and the sliding direction of the buffer rubber (601) is consistent with the axial direction of the two bushings. One end of the buffer rubber (601) is provided with a displacement driving component, which is mounted on the corresponding main bushing (1) or secondary bushing (2).

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