Long-span plum coupling

Abstract

The utility model relates to the technical field of couplings, in particular to a long-span plum coupling which comprises a coupling body. The bushings are arranged on one sides of the two coupling main bodies; the connecting sleeve is jointly connected between the two bushings; a threaded hole is formed in the bushing, and the bushing is connected with the countersunk screw through the threaded hole; and one end of the countersunk screw penetrates through the bushing and is in threaded connection with the expansion sleeve. According to the utility model, through the design of the expansion sleeve, the screw and the bushing, the bushing is propped against the connecting sleeve after being expanded, so that the connecting sleeve and the bushing cannot relatively slide or loosen when the device rotates at a high speed, and the precision and the stability of torque transmission are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coupling technical field especially relates to a long span plum blossom coupling. BACKGROUND

[0002] Coupling refers to the coupling of two shafts or shafts and rotating parts, which can rotate together during the transmission of motion and power, and is not disconnected under normal circumstances. It is often used as an important part of the mechanical transmission system, used to connect two shafts or shafts and rotating parts to transmit torque and motion. Simply put, the coupling is used to connect two shafts in different structures, so that they can rotate together and transmit torque. Sometimes, the coupling also serves as a safety device to prevent the coupled machine from bearing excessive load, and plays the role of overload protection.

[0003] The traditional long-span coupling is usually composed of a coupling body, an elastic body, a bushing, a connecting sleeve and a locking screw, which has a simple structure, so that the locking screw may fall off during operation of the coupling, causing the bushing and the connecting sleeve to loosen during operation of the device, causing work accidents and seriously affecting work progress and work efficiency.

[0004] Therefore, it is necessary to design a long-span plum blossom coupling. INVENTION CONTENTS

[0005] In order to overcome the shortcomings of the traditional long-span coupling, such as simple structure, locking screw falling off during operation, and seriously affecting work progress and work efficiency, the technical problem to be solved by the utility model is to provide a long-span plum blossom coupling.

[0006] The technical scheme of the utility model is:

[0007] A long-span plum blossom coupling, comprising:

[0008] A coupling body;

[0009] A bushing is arranged on one side of each of the two coupling bodies;

[0010] A connecting sleeve is connected between the two bushings;

[0011] A screw is provided with a threaded hole in the bushing, and a countersunk screw is connected to the bushing through the threaded hole; and

[0012] An expansion sleeve is threadedly connected to one end of the countersunk screw penetrating through the bushing.

[0013] Optionally, it further comprises an elastic body arranged between the coupling body and the bushing, and the coupling body and the bushing are tightly connected through the elastic body.

[0014] Optionally, the elastic body is designed in a gear shape.

[0015] Optionally, the bushing is provided with a tapered hole on one side for accommodating the expansion sleeve.

[0016] Optionally, the expansion sleeve is designed in a tapered shape, and the tapered hole of the bushing is sized to fit the expansion sleeve.

[0017] Optionally, the bushing is provided with an opening at one end close to the tapered hole, and the bushing is radially expanded after being pressed by the expansion sleeve.

[0018] Optionally, the shaft coupling body is provided with a plurality of through holes on the side wall.

[0019] Optionally, the screw is an internal hexagonal countersunk screw, and one end of the threaded hole of the bushing is tapered for accommodating the head of the screw.

[0020] Optionally, the shaft coupling body and the bushing are clamped by the elastic body.

[0021] Optionally, the connecting sleeve is internally provided with a protrusion for limiting the two bushings.

[0022] Compared with the prior art, the utility model has the following advantages: 1. The utility model discloses an expansion sleeve, a screw and a bushing, so that the bushing is expanded and kept in abutment with the connecting sleeve, ensuring that the connecting sleeve and the bushing do not slide or loosen relative to each other during high-speed rotation of the device, thereby ensuring the accuracy and stability of torque transmission.

[0023] 2. The tapered hole of the bushing is combined with the tapered structure of the expansion sleeve, so that the bushing expands to different degrees at different positions after being pressed, further improving the compactness with the connecting sleeve and effectively avoiding the problem of falling off.

[0024] 3. The utility model discloses an internal hexagonal countersunk screw as a fastener, which provides a larger contact area than ordinary screws, can withstand higher torque without being easily damaged, and ensures the assembly quality and long-term reliability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model shaft coupling body, bushing and connecting sleeve.

[0027] Figure 3 It is an exploded view of the bushing, connecting sleeve and elastic body of the utility model.

[0028] Figure 4 This is an exploded view of the bushing, screw, and expansion sleeve of this utility model.

[0029] The markings in the attached diagram are: 1. Coupling body, 2. Bushing, 3. Connecting sleeve, 4. Elastomer, 5. Screw, 6. Expansion sleeve. Detailed Implementation

[0030] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0031] Example: A long-span plum blossom coupling, such as Figures 1-4 As shown, the coupling includes a main body 1, bushings 2, connecting sleeves 3, an elastic body 4, screws 5, and expansion sleeves 6. Bushings 2 are provided on opposite sides of the main body 1, and a connecting sleeve 3 connects the two bushings 2. An elastic body 4, with a gear-shaped design, is provided between the main body 1 and the bushings 2. The main body 1 and bushings 2 are tightly connected via the elastic body 4. A threaded hole is provided on the bushing 2, through which a countersunk screw 5 is connected. One end of the countersunk screw 5 passes through the bushing 2 and is threaded onto a screw. The expansion sleeve 6 and the connecting sleeve 3 are provided with protrusions for limiting the two bushings 2. The coupling body 1 and the bushings 2 are locked in a claw-like manner through the elastic body 4. The side wall of the coupling body 1 is provided with multiple through holes. Here, after the assembly of the coupling body 1, bushings 2 and elastic body 4 is completed, the elastic body 4 will generate sufficient friction or biting force to maintain a tight connection between the components, ensuring that it will not loosen under normal use conditions. At the same time, the claw-like locking can effectively resist vibration and impact, and prevent accidental dislodgement caused by external forces.

[0032] like Figures 2-4 As shown, a tapered hole for accommodating the expansion sleeve 6 is provided on one side of the bushing 2. The expansion sleeve 6 has a tapered design structure, and the tapered hole of the bushing 2 is adapted to the size of the expansion sleeve 6. Here, through the design of the tapered hole of the bushing 2 and the tapered structure of the expansion sleeve 6, the bushing 2 expands to different degrees in different parts after being deformed and squeezed by the expansion sleeve 6, thereby further improving the compactness of the bushing 2 and the connecting sleeve 3 and avoiding the problem of falling off.

[0033] like Figures 3-4As shown, the bushing 2 has an opening at one end near the tapered hole. After being squeezed by the expansion sleeve 6, the bushing 2 is radial. Here, the design of the through groove enables the bushing 2 to expand outward more conveniently and efficiently when the expansion sleeve 6 deforms and squeezes it, so that the expansion sleeve 6 and the connecting sleeve 3 are tightly connected.

[0034] like Figures 2-3 As shown, screw 5 is a countersunk hexagonal screw. One end of the threaded hole of bushing 2 is tapered to accommodate the head of screw 5. Compared with ordinary cross or slotted screws, the design of screw 5 as a countersunk hexagonal screw provides a larger contact area, which can withstand higher torque during tightening without stripping the threads or damaging the tool head, thus ensuring the assembly quality of the device.

[0035] This device has the basic function of a coupling. During assembly, two expansion sleeves 6 are inserted into the tapered holes of two bushings 2 respectively. Then, the connecting sleeve 3 is fitted onto the two bushings 2. After that, a screw 5 is passed through one side of the bushing 2 so that the screw 5 is threaded into the expansion sleeve 6. During the connection process, the screw 5 applies force to the expansion sleeve 6. After being subjected to force, the expansion sleeve 6 deforms and squeezes the bushing 2. After being subjected to force, the bushing 2 expands outward, so that the bushing 2 and the connecting sleeve 3 remain in contact. This ensures that even when the device rotates at a high speed, the connecting sleeve 3 and the bushing 2 will not slip or loosen relative to each other, thereby ensuring that the torque transmission accuracy will not decrease. Finally, the coupling body 1, bushing 2 and elastic body 4 are assembled by claw-type engagement, thus completing the entire assembly process.

[0036] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A long span star coupling, characterized by, The utility model relates to a long-span plum coupling, which comprises a coupling body (1), a bushing (2) arranged on one side of the coupling body (1), a connecting sleeve (3) connected between the two bushings (2), a screw (5) with a threaded hole formed in the bushing (2) and a sunk head, and an expansion sleeve (6) screwed on one end of the sunk head screw (5) and penetrating through the bushing (2).

2. The long-span plum coupling according to claim 1, further comprising an elastic body (4) arranged between the coupling body (1) and the bushing (2) and tightly connecting the coupling body (1) and the bushing (2).

3. The long-span plum coupling according to claim 2, wherein the elastic body (4) is designed in a gear shape.

4. The long-span plum coupling according to claim 3, wherein a tapered hole for accommodating the expansion sleeve (6) is formed in one side of the bushing (2).

5. The long-span plum coupling according to claim 4, wherein the expansion sleeve (6) is designed in a tapered shape, and the tapered hole of the bushing (2) is matched with the expansion sleeve (6) in size.

6. The long-span plum coupling according to claim 5, wherein an opening is formed in one end of the bushing (2) close to the tapered hole, and the bushing (2) is radially expanded after being pressed by the expansion sleeve (6).

7. The long-span plum coupling according to claim 6, wherein a plurality of through holes are formed in the side wall of the coupling body (1).

8. The long-span plum coupling according to claim 7, wherein the screw (5) is an internal hexagonal sunk head screw, and one end of the threaded hole of the bushing (2) is tapered to accommodate the head of the screw (5).

9. The long-span plum coupling according to claim 8, wherein the coupling body (1) and the bushing (2) are clamped by the elastic body (4), and the connecting sleeve (3) is internally provided with a protrusion for limiting the two bushings (2). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10. A long span spider coupling according to claim 9, wherein, ​

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