Telescopic adjustable coupling

Abstract

The utility model relates to the technical field of couplings, in particular to a telescopic adjustable coupling which comprises a main shaft sleeve and an auxiliary shaft sleeve, sliding assemblies are arranged at one end of the main shaft sleeve and one end of the auxiliary shaft sleeve, and the two sliding assemblies are oppositely arranged. Limiting grooves are formed in the outer walls of the main shaft sleeve and the auxiliary shaft sleeve, and the sliding assembly on the shaft sleeve is in sliding connection with the limiting groove of the other matched shaft sleeve. The limiting groove comprises a main sliding groove and auxiliary sliding grooves, the sliding groove direction of the main sliding groove is consistent with the axial direction of the shaft sleeve, the sliding groove direction of the auxiliary sliding grooves is perpendicular, and the main sliding groove is communicated with the multiple auxiliary sliding grooves. The end, away from the main sliding groove, of each auxiliary sliding groove communicates with a positioning groove, and buffering assemblies are arranged at the two ends, in the axial direction of the shaft sleeve, of each positioning groove. The buffer assembly at one end of each positioning groove is connected to a displacement assembly, and the displacement direction of the displacement assembly is consistent with the axial direction of the shaft sleeve. According to the utility model, the technical problems that the coupling distance of the coupler cannot be adjusted, and larger torque cannot be transmitted after the distance is adjusted are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a telescopic and adjustable coupling. Background Art

[0002] A coupling is a device that connects two shafts, or a shaft and a rotating part, allowing them to rotate together without disengagement during the transmission of motion and power. Couplings are widely used in mechanical systems across various industries. As a crucial component of mechanical transmission devices, they play a key role in various mechanical systems.

[0003] In some heavy equipment couplings, couplings are difficult to achieve due to the heavy weight and difficulty in moving the equipment, as well as the large distances between the equipment. Existing telescopic couplings generally have a limited telescopic range, making them difficult to use for couplings over longer distances. Furthermore, overly long coupling distances place the coupling under greater loads and torque, making it more susceptible to damage.

[0004] The Chinese utility model patent, entitled "An Adjustable Coupling," with publication number CN215805843U, has been published. The patent includes a sleeve and a limiter assembly. The sleeve has through holes at both ends, with balls disposed on the surface of the through holes. A drive shaft is slidably connected to the through holes, and a connector is disposed on the outside of the drive shaft. The sleeve has an oiling hole, and threaded grooves are formed at both ends of the sleeve surface. A movable ring is threadedly connected to the threaded grooves, and the movable ring is fixedly connected to a limiter ring. The sleeve has limiter rods slidably connected to both ends. This utility model facilitates the sliding adjustment of two sets of drive shafts while also transmitting torque. The ball bearings reduce wear on the drive shafts during sliding.

[0005] Although the utility model can transmit torque while sliding adjustment, it only relies on the limit rod to fix the transmission shaft, and the friction surface and friction resistance are small, so it can only transmit a small torque. Utility Model Content

[0006] The purpose of this application is to provide a telescopic adjustable coupling, which solves the technical problems that the coupling cannot adjust the coupling spacing and cannot transmit a large torque after the spacing is adjusted.

[0007] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0008] A telescopic adjustable coupling comprises a main shaft sleeve and a secondary shaft sleeve. Both the main shaft sleeve and the secondary shaft sleeve are provided with shaft fixing structures. The main shaft sleeve and the secondary shaft sleeve are coaxially connected.

[0009] Preferably, one end of the main shaft sleeve and the secondary shaft sleeve are both provided with a sliding assembly, and the sliding assemblies of the two shaft sleeves are arranged facing each other.

[0010] Preferably, the outer walls of the main shaft sleeve and the auxiliary shaft sleeve are both provided with limiting grooves, wherein the sliding assembly on the main shaft sleeve or the auxiliary shaft sleeve is slidably connected with the limiting groove on another corresponding matching auxiliary shaft sleeve or main shaft sleeve.

[0011] Preferably, the limiting groove includes a main groove and an auxiliary groove, the groove direction of the main groove is consistent with the axial direction of the sleeve, the groove direction of the auxiliary groove is perpendicular to the axial direction of the sleeve, and at least two auxiliary grooves are connected to the main groove.

[0012] Preferably, one end of each auxiliary chute away from the main chute is connected to a positioning groove, and buffer components are provided at both ends of the positioning groove along the axial direction of the sleeve.

[0013] Preferably, the buffer assembly at one end of each positioning groove is connected to a displacement assembly, and the displacement direction of the displacement assembly is consistent with the axial direction of the sleeve.

[0014] Preferably, the sliding assembly includes a slide plate and a slider, one end of the slide plate is fixedly connected to one end of the main shaft sleeve or the auxiliary shaft sleeve, and the shape of the inner wall of the slide plate is consistent with the shape of the outer wall of the sleeve.

[0015] Preferably, a plurality of sliding blocks are fixedly provided on the inner wall of the slide plate, the sliding blocks are evenly arranged on the slide plate along the axial direction of the shaft sleeve, and the sliding blocks are slidably connected to the sliding grooves in the limiting grooves.

[0016] Preferably, the groove width of the positioning groove along the axial ends of the shaft sleeve is greater than the groove width of the auxiliary sliding groove along the axial ends of the shaft sleeve.

[0017] Preferably, the buffer assembly includes an elastic member 1 and an elastic member 2, the elastic member 1 is fixedly arranged at one end of the positioning groove, and the elastic member 2 is slidably arranged at the other end of the positioning groove, and the sliding direction is consistent with the axial direction of the sleeve.

[0018] Preferably, one end of the second elastic member is fixedly connected to the displacement assembly.

[0019] Preferably, the displacement assembly includes a displacement groove, which is respectively provided on the outer wall of the main shaft sleeve and the auxiliary shaft sleeve, and the displacement groove is connected to the side of the positioning groove away from the limiting groove.

[0020] Preferably, a displacement block is slidably provided in the sliding groove of the displacement groove, and the sliding direction of the displacement block is consistent with the axial direction of the shaft sleeve.

[0021] Preferably, one end of the displacement block is fixedly connected to a threaded end of a bolt member, the thread of the bolt member is arranged in a threaded hole of the corresponding main shaft sleeve or auxiliary shaft sleeve, and the bolt member passes through one end groove surface of the displacement groove.

[0022] Preferably, the shaft fixing structure includes a slot and a threaded hole.

[0023] Preferably, a slot is formed through the shaft holes of the main shaft sleeve and the auxiliary shaft sleeve, and an open end of the slot passes through a side wall of the shaft sleeve.

[0024] Preferably, the threaded holes are vertically provided on one side of the main shaft sleeve and the secondary shaft sleeve, and the threaded holes are provided through both ends of the slotted opening.

[0025] The technical solution of this application has at least the following advantages and beneficial effects:

[0026] In the utility model, by providing a sliding assembly, a limiting groove and a positioning groove, the coupling can change the distance between the two shaft sleeves therein, so as to facilitate the coupling function for the long distance between the drive shafts of the equipment that is difficult to transport externally;

[0027] In the present invention, by providing a buffer component and a displacement component, the buffer component can clamp and abut the sliding component in the positioning groove, so that the two sleeves in the coupling can be quickly fixed after adjustment, thereby realizing the coupling function;

[0028] In the present invention, by providing a positioning groove and a buffer assembly, when the two sleeves are subjected to the torque of the drive shaft, the sliding assembly will abut against the groove surface of the positioning groove. Through the surface-to-surface abutment, the torque that the sleeve can transmit is increased, and the buffer assembly will absorb the axial vibration from the drive shaft, reduce the wear at the sleeve connection, and increase the service life of the coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention during adjustment.

[0030] Figure 2 This is a front view structural diagram of Example 1 of the present utility model.

[0031] Figure 3 This is a schematic cross-sectional view of the first embodiment of the present invention.

[0032] Figure 4 This is a schematic cross-sectional structural diagram of the displacement assembly of Example 1 of the present invention.

[0033] Figure 5 This is a structural diagram of Example 2 of the present utility model.

[0034] Figure 6 This is a schematic structural diagram of the first embodiment of the present invention when the shafts are coupled.

[0035] Figure 7 This is a structural diagram of another angle when coupling the shafts in Example 1 of the present invention.

[0036] In the figure: 1-main shaft sleeve, 2-secondary shaft sleeve, 3-sliding assembly, 301-slide plate, 302-slider, 4-limiting groove, 401-main slide groove, 402-secondary slide groove, 5-positioning groove, 6-buffer assembly, 601-elastic block one, 602-elastic block two, 7-displacement assembly, 701-displacement groove, 702-displacement block, 703-bolt member, 8-axis fixing structure, 801-slot, 802-threaded hole, 901-clamping plate, 902-spline buffer member. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "center," "upper," "lower," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the figures, or the positions or locations in which the product is typically placed when in use. These terms are used solely for ease of description and simplification of the present application. They do not indicate or imply that the device or component referred to must have a specific position, be constructed, or operate in a specific orientation, and are not to be construed as limiting the present application. It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections or indirect connections through an intermediary; or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application in specific contexts.

[0039] Example

[0040] Please refer to Figure 1-Figure 7 The utility model provides a telescopic adjustable coupling, including a main shaft sleeve 1, a secondary shaft sleeve 2, a sliding component 3, a limit groove 4, a positioning groove 5, a buffer component 6, a displacement component 7, a shaft fixing structure 8, and a connecting piece.

[0041] In the prior art, couplings, especially rigid couplings, are generally composed of a main shaft sleeve 1 and a secondary shaft sleeve 2 coaxially fixedly connected together. Both the main shaft sleeve 1 and the secondary shaft sleeve 2 are provided with a shaft fixing structure 8 for fixing the drive shaft of the external device and rigidly connecting the two drive shafts together.

[0042] In the first embodiment, the sliding assembly 3 is provided in the coupling so that the distance between the main shaft sleeve 1 and the secondary shaft sleeve 2 can be relatively changed, thereby adjusting the distance between the coupling shafts of the coupling.

[0043] Furthermore, a sliding assembly 3 is provided at one end of the main shaft sleeve 1 and the secondary shaft sleeve 2, and the sliding assemblies 3 of the two shaft sleeves are arranged facing each other. The outer walls of the main shaft sleeve 1 and the secondary shaft sleeve 2 are provided with a limiting groove 4, wherein the sliding assembly 3 on the main shaft sleeve 1 or the secondary shaft sleeve 2 is slidably connected with the limiting groove 4 on another corresponding matching secondary shaft sleeve 2 or the main shaft sleeve 1, so that the sliding assembly 3 slides in the limiting groove 4 of the corresponding shaft sleeve, thereby changing the distance between the main shaft sleeve 1 and the secondary shaft sleeve 2.

[0044] Please refer to Figure 2-Figure 4 , wherein the sliding assembly 3 includes a slide plate 301 and a slider 302 .

[0045] The limiting groove 4 includes a main sliding groove 401 and an auxiliary sliding groove 402 .

[0046] Specifically, one end of the slide 301 is fixedly connected to one end of the main shaft sleeve 1 (or the secondary shaft sleeve 2). The inner wall of the slide 301 is shaped identically to the outer wall of the shaft sleeve, ensuring smoother rotation and reducing contact gaps when the shaft sleeves rotate relative to each other. Multiple sliders 302 are fixedly mounted on the inner wall of the slide 301. The sliders 302 are evenly arranged along the axial direction of the shaft sleeve on the slide 301 and are slidably connected to the primary chute 401 and the secondary chute 402 in the limiting groove 4.

[0047] Among them, the main slide groove 401 and the auxiliary slide groove 402 are located on the outer wall of the main shaft sleeve 1 (or the auxiliary shaft sleeve 2), the slide groove direction of the main slide groove 401 is consistent with the axial direction of the shaft sleeve, and the slide groove direction of the auxiliary slide groove 402 is perpendicular to the axial direction of the shaft sleeve. There are at least two auxiliary slide grooves 402 connected to the main slide groove 401.

[0048] Preferably, the slider 302 can slide in the main slot 401 relative to the axial direction of the sleeve, and can slide in the auxiliary slot 402 relative to the axial direction of the sleeve. When the slider 302 slides in the main slot 401, the distance between the main sleeve 1 and the auxiliary sleeve 2 at the opposite ends can be changed. When the slider 302 slides in the auxiliary slot 402, the relative displacement between the two sleeves is restricted, and the distance cannot be changed, thereby maintaining the existing distance between the sleeves.

[0049] Furthermore, each auxiliary slide 402 is connected to a positioning groove 5 at one end away from the main slide 401, and the positioning groove 5 is provided with buffer components 6 at both ends along the axial direction of the sleeve. The buffer component 6 at one end of each positioning groove 5 is connected to a displacement component 7, and the displacement direction of the displacement component 7 is consistent with the axial direction of the sleeve.

[0050] When the sliding component 3 is displaced through the limit groove 4, it will slide into the positioning groove 5, be restricted in rotation by the positioning groove 5 surface, and be clamped and fixed by the buffer component 6 driven by the displacement component 7 to prevent the sliding component 3 from axial displacement of the sleeve, thereby fixing the main sleeve 1 and the secondary sleeve 2, so that torque can be transmitted and the coupling function is realized.

[0051] The buffer assembly 6 includes an elastic block 1 601 and an elastic block 2 602 .

[0052] The displacement assembly 7 includes a displacement slot 701 , a displacement block 702 , and a bolt member 703 .

[0053] Specifically, the elastic member 1 is fixedly arranged at one end of the positioning groove 5 along the axial direction of the sleeve, and the elastic member 2 is slidably arranged at the other end of the positioning groove 5 along the axial direction of the sleeve, and the sliding direction is consistent with the axial direction of the sleeve.

[0054] The groove width of the positioning groove 5 along the axial ends of the shaft sleeve is greater than the groove width of the auxiliary sliding groove 402 along the axial ends of the shaft sleeve.

[0055] Preferably, when the slider 302 slides into the positioning groove 5, since the width of the slider 302 is consistent with the groove width of the positioning groove 5, it will be blocked by the groove surface of the positioning groove 5 at both ends of the shaft sleeve along the axial direction, limiting its continued rotation, so that the two shaft sleeves can transmit torque. When the coupling function is performed, the axial vibration of the drive shaft end from the external device will be transmitted to the two shaft sleeves, causing the slider 302 and the positioning groove 5 to be subjected to axial vibration. At this time, the elastic member 1 and the elastic member 2 located at both ends of the positioning groove 5 will absorb the axial vibration through their own elastic structure, reducing the axial stress and wear between the slider 302 and the positioning groove 5, and improving the service life of the coupling.

[0056] On the side of the positioning groove 5 away from the limiting groove 4, there is also a displacement groove 701 connected. The displacement groove 701 is respectively arranged on the outer wall of the main shaft sleeve 1 and the secondary shaft sleeve 2. A displacement block 702 is slidingly arranged in the sliding groove of the displacement groove 701, and the sliding direction of the displacement block 702 is consistent with the axial direction of the sleeve.

[0057] All elastic blocks 2 602 are fixedly connected to the displacement block 702, driving all elastic blocks 2 602 to move synchronously. One end of the displacement block 702 in the sliding direction is fixedly connected to the threaded end of the bolt member 703. The bolt member 703 is threadedly set in the threaded hole 802 of the corresponding main shaft sleeve 1 or secondary shaft sleeve 2, and the bolt member 703 passes through one end groove surface of the displacement groove 701.

[0058] It is worth noting that the elastic block 1 601 and the elastic block 2 602 are configured as elastic rubber blocks.

[0059] Preferably, when there is no need to adjust the coupling spacing of the coupling, the slider 302 is located in the positioning groove 5 and abuts against the elastic block 1 601 and the elastic block 2 602, wherein the elastic block 2 602 is subjected to axial pressure from the displacement block 702 and the bolt member 703, exerting pressure on the slider 302 to prevent the slider 302 from falling out of the positioning groove 5.

[0060] When the coupling spacing of the coupling needs to be adjusted, the bolt 703 is twisted to drive the displacement block 702 to move, and the elastic block 2 602 is brought into the groove end of the positioning groove 5, separated from the slider 302, so that the slider 302 is loosened and enters the auxiliary slide groove 402 for rotation, and then enters the main slide groove 401 for axial displacement, thereby adjusting the coupling spacing; after the spacing adjustment is completed, the slider 302 is slid into the positioning groove 5, and is fixed by the displacement of the elastic block 2 602 to ensure the normal use of the coupling.

[0061] In the first embodiment, the shaft fixing structure 8 is used to fix the driving shaft of the external device. The shaft fixing structure 8 includes a slot 801 and a threaded hole 802 .

[0062] Specifically, a slot 801 is formed in the shaft holes of the main shaft sleeve 1 and the auxiliary shaft sleeve 2, and the open end of the slot 801 passes through a side wall of the shaft sleeve. A threaded hole 802 is vertically provided on one side of the main shaft sleeve 1 and the auxiliary shaft sleeve 2, and the threaded hole 802 passes through both ends of the opening of the slot 801.

[0063] Among them, the shaft hole diameters of the main shaft sleeve 1 and the secondary shaft sleeve 2 are generally larger than the shaft diameter of the driving shaft of the coupling, so that the driving shaft can be inserted into them. Then the bolt 703 will be twisted in the threaded hole 802 at the slot 801, and the opening size of the slot 801 will be reduced by tightening the thread. As the opening of the slot 801 becomes smaller, the shaft hole diameter in the sleeve will also become smaller, so that the inner wall of the shaft hole gradually abuts against the driving shaft, generating a friction component until the driving shaft is fixed for transmitting torque and realizing the coupling.

[0064] Please refer to Figure 5 In another feasible embodiment 2, the coupling spacing of the coupling can be increased more significantly.

[0065] Specifically, the coupling body described in the first embodiment is respectively configured as a first shaft sleeve and a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are connected together by a connecting piece to form a new coupling structure.

[0066] The connecting member includes a clamping plate 901 and a spline buffer member 902 .

[0067] One end of the sleeve one is fixedly connected to a clamping plate 901, and one end of the sleeve two is also fixedly connected to a clamping plate 901. The two clamping plates 901 are arranged facing each other, and a spline buffer 902 is fixedly clamped between the two clamping plates 901. The clamping block on the clamping plate 901 and the spline groove on the spline buffer will be relatively clamped to transmit the torque between the sleeve one and the sleeve two.

[0068] Preferably, the first and second shaft sleeves can each be independently adjusted for unidirectional coupling spacing, and the two shaft sleeves can be adjusted to a longer spacing, which has a wider applicability.

[0069] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details known in the art have been omitted. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A telescopic adjustable coupling, comprising a main shaft sleeve (1) and a secondary shaft sleeve (2), wherein both the main shaft sleeve (1) and the secondary shaft sleeve (2) are provided with a shaft fixing structure (8), and the main shaft sleeve (1) and the secondary shaft sleeve (2) are coaxially connected, characterized in that ； One end of each of the main shaft sleeve (1) and the auxiliary shaft sleeve (2) is provided with a sliding assembly (3), and the sliding assemblies (3) of the two shaft sleeves are arranged facing each other; The outer walls of the main shaft sleeve (1) and the auxiliary shaft sleeve (2) are both provided with a limiting groove (4), wherein the sliding assembly (3) on the main shaft sleeve (1) or the auxiliary shaft sleeve (2) is slidably connected with the limiting groove (4) on the other corresponding matching auxiliary shaft sleeve (2) or the main shaft sleeve (1); The limiting groove (4) includes a main sliding groove (401) and an auxiliary sliding groove (402), the sliding groove direction of the main sliding groove (401) is consistent with the axial direction of the shaft sleeve, the sliding groove direction of the auxiliary sliding groove (402) is perpendicular to the axial direction of the shaft sleeve, and the main sliding groove (401) is connected to at least two auxiliary sliding grooves (402); One end of each auxiliary chute (402) away from the main chute (401) is connected to a positioning groove (5), and buffer components (6) are provided at both ends of the positioning groove (5) along the axial direction of the sleeve; The buffer assembly (6) at one end of each positioning groove (5) is connected to a displacement assembly (7), and the displacement direction of the displacement assembly (7) is consistent with the axial direction of the shaft sleeve.

2. A telescopic adjustable coupling according to claim 1, characterized in that: The sliding assembly (3) comprises a slide plate (301) and a slider (302), one end of the slide plate (301) is fixedly connected to one end of the main shaft sleeve (1) or the auxiliary shaft sleeve (2), and the shape of the inner wall of the slide plate (301) is consistent with the shape of the outer wall of the shaft sleeve; A plurality of sliding blocks (302) are fixedly arranged on the inner wall of the slide plate (301). The sliding blocks (302) are evenly arranged on the slide plate (301) along the axial direction of the shaft sleeve. The sliding blocks (302) are slidably connected to the sliding grooves in the limiting grooves (4).

3. The telescopic adjustable coupling according to claim 1, characterized in that: The groove width of the positioning groove (5) along the axial ends of the shaft sleeve is greater than the groove width of the auxiliary sliding groove (402) along the axial ends of the shaft sleeve.

4. The telescopically adjustable coupling according to claim 1, characterized in that: The buffer assembly (6) comprises an elastic member 1 and an elastic member 2, wherein the elastic member 1 is fixedly arranged at one end of the positioning groove (5), and the elastic member 2 is slidably arranged at the other end of the positioning groove (5), and the sliding direction is consistent with the axial direction of the shaft sleeve; One end of the second elastic member is fixedly connected to the displacement assembly (7).

5. The telescopically adjustable coupling according to claim 1, characterized in that: The displacement assembly (7) comprises a displacement groove (701), the displacement groove (701) being respectively arranged on the outer wall of the main shaft sleeve (1) and the auxiliary shaft sleeve (2), and the displacement groove (701) being connected to a side of the positioning groove (5) away from the limiting groove (4); A displacement block (702) is slidably arranged in the sliding groove of the displacement groove (701), and the sliding direction of the displacement block (702) is consistent with the axial direction of the shaft sleeve.

6. The telescopically adjustable coupling according to claim 5, characterized in that: One end of the displacement block (702) is fixedly connected to the threaded end of a bolt member (703), the bolt member (703) is threadedly arranged in a threaded hole (802) of the corresponding main shaft sleeve (1) or auxiliary shaft sleeve (2), and the bolt member (703) passes through one end groove surface of the displacement groove (701).

7. The telescopically adjustable coupling according to claim 1, characterized in that: The shaft fixing structure (8) includes a slot (801) and a threaded hole (802); A slot (801) is provided through the shaft holes of the main shaft sleeve (1) and the auxiliary shaft sleeve (2), and an open end of the slot (801) passes through a side wall of the shaft sleeve; The threaded hole (802) is vertically provided on one side of the main shaft sleeve (1) and the secondary shaft sleeve (2), and the threaded hole (802) is provided through both ends of the opening of the slot (801).

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