Coupling with locking structure

Abstract

The utility model discloses a coupler with a locking structure, which comprises two coupler main bodies, the two coupler main bodies are respectively sleeved at the end parts of two main shafts, one end of each coupler main body facing the main shaft is provided with a shaft hole, the shaft hole is provided with a key slot, the outer wall of the main shaft is provided with a flat key, and the flat key is matched in the key slot in a sliding way. The main shaft is sleeved with a jacking sleeve, jacking bolts are evenly arranged on the jacking sleeve, threaded holes are evenly formed in the coupling body, the jacking bolts penetrate through the jacking sleeve to be in threaded fit with the threaded holes, a jacking block is arranged on the side, facing the flat key, of the jacking sleeve, and the jacking block is in sliding fit with the key groove and jacks the flat key. According to the coupler with the locking structure, the jacking sleeve and the jacking bolt are adopted, the flat key is jacked through the jacking block, the main shaft and the coupler can be effectively locked, axial movement between the main shaft and the coupler is prevented, and the coupler is easy to disassemble.

Description

Technical Field

[0001] The utility model relates to a coupling technology, in particular to a coupling with a locking structure. Background Art

[0002] A coupling is a device that connects two shafts, or a shaft and a rotating part, allowing them to rotate together during motion and power transmission and remain in place under normal circumstances. It is also sometimes used as a safety device to protect the connected parts from excessive loads, providing overload protection. Existing couplings typically connect to the main shaft using a key, which transmits torque within a keyway. This connection offers a simple structure and low cost.

[0003] However, the key connection can only limit the radial rotation between the main shaft and the coupling, and cannot prevent the axial movement between the main shaft and the coupling. Therefore, it is generally necessary to add a positioning screw to lock it; that is, the front end of the positioning screw will directly contact the shaft or key, scratching the shaft or key, making it difficult to disassemble. Utility Model Content

[0004] In order to solve the defects of the above-mentioned prior art, the utility model provides a coupling with a locking structure, which can effectively lock the main shaft and the coupling to prevent axial movement between the main shaft and the coupling, and is easy to disassemble.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solutions: a coupling with a locking structure, comprising two coupling bodies, which are respectively sleeved on the two main shaft ends, the coupling body being provided with an axial hole facing one end of the main shaft, the axial hole being provided with a keyway, the outer wall of the main shaft being provided with a flat key, the flat key being slidably fitted in the keyway, the main shaft sleeve being provided with a tightening sleeve, the tightening sleeve being evenly provided with tightening bolts, the coupling body being evenly provided with threaded holes, the tightening bolts passing through the tightening sleeves and being threadedly fitted with the threaded holes, the tightening sleeve being provided with a tightening block on the side facing the flat key, the tightening block being slidably fitted in the keyway and tightening the flat key.

[0006] Preferably, both ends of the two coupling bodies are provided with annular protrusions, and the protrusions are evenly provided with bolt holes, and the bolt holes are penetrated by coupling bolts, and the coupling bolts are threaded with nuts, and the coupling bolts and nuts cooperate to fix the two coupling bodies.

[0007] Preferably, a plurality of locking members are provided at the bottom end of the shaft hole.

[0008] Preferably, there are two keyways, two flat keys and two tightening blocks.

[0009] In summary, the present invention has achieved the following technical effects:

[0010] The coupling with a locking structure of the utility model adopts a tightening sleeve and a tightening bolt, and tightens a flat key through a tightening block, which can effectively lock the main shaft and the coupling, prevent axial movement between the main shaft and the coupling, and is easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of a coupling with a locking structure of the present utility model;

[0012] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Main shaft; 2. Coupling body; 3. Bolt hole; 4. Locking piece; 5. Keyway; 6. Flat key; 7. Tightening sleeve; 8. Tightening block; 9. Tightening bolt; 10. Threaded hole. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below with reference to the accompanying drawings.

[0014] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

[0015] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0017] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0018] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0019] Example 1:

[0020] like Figure 1 As shown, a coupling with a locking structure includes two coupling bodies 2, which are respectively sleeved on the ends of two main shafts 1, and the coupling body 2 is provided with an axial hole on one end facing the main shaft 1, and the axial hole is provided with a keyway 5. The outer wall of the main shaft 1 is provided with a flat key 6, and the flat key 6 slides in the keyway 5. The main shaft 1 is sleeved with a tightening sleeve 7, and the tightening sleeve 7 is evenly provided with tightening bolts 9. The coupling body 2 is evenly provided with threaded holes 10, and the tightening bolts 9 pass through the tightening sleeve 7 and are threadedly fitted with the threaded holes 10. The tightening sleeve 7 is provided with a tightening block 8 on the side facing the flat key 6, and the tightening block 8 slides in the keyway 5 and tightens the flat key 6.

[0021] The coupling with a locking structure in this embodiment adopts a tightening sleeve 7 and a tightening bolt 9, and tightens the flat key 6 through a tightening block 8, which can effectively lock the main shaft 1 and the coupling, prevent axial movement between the main shaft 1 and the coupling, and is easy to disassemble.

[0022] The ends of the two coupling bodies 2 are both provided with annular protrusions, and the protrusions are evenly provided with bolt holes 3. The bolt holes 3 are penetrated by coupling bolts, and the coupling bolts are threaded with nuts. The coupling bolts and nuts cooperate to fix the two coupling bodies 2.

[0023] The bottom end of the shaft hole is provided with a plurality of locking members 4, wherein the locking members 4 can be multiple, and are mainly used to support the main shaft 1 so that the tightening block 8 can support the flat key 6, to prevent the main shaft 1 from being inserted too deeply into the shaft hole and the tightening block 8 from being insufficiently long to support the flat key 6.

[0024] There are two keyways 5, flat keys 6 and tightening blocks 8. The two keyways 5, flat keys 6 and tightening blocks 8 can not only balance the force, avoid tilting of the tightening sleeve 7, and prevent damage to the tightening bolts 9, so as to facilitate subsequent disassembly, but also balance the weight on both sides of the main shaft 1, which is beneficial to maintaining the stability of the main shaft 1 during rotation.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A coupling with a locking structure, comprising two coupling bodies, each of which is sleeved on the ends of two main shafts, wherein the coupling body is provided with an axial hole toward one end of the main shaft, the axial hole is provided with a keyway, and the outer wall of the main shaft is provided with a flat key, the flat key slidingly fitting in the keyway, characterized in that: The main shaft sleeve is provided with a tightening sleeve, and the tightening sleeve is evenly provided with tightening bolts. The coupling body is evenly provided with threaded holes. The tightening bolts pass through the tightening sleeve and are threadedly engaged with the threaded holes. The tightening sleeve is provided with a tightening block on the side facing the flat key. The tightening block slides in the keyway and tightens the flat key.

2. A coupling with a locking structure according to claim 1, characterized in that: The ends of the two coupling bodies are both provided with annular protrusions, and the protrusions are evenly provided with bolt holes. The bolt holes are penetrated by coupling bolts, and the coupling bolts are threaded with nuts. The coupling bolts and nuts cooperate to fix the two coupling bodies.

3. The coupling with a locking structure according to claim 1, characterized in that: A plurality of locking pieces are provided at the bottom end of the shaft hole.

4. The coupling with a locking structure according to claim 1, characterized in that: There are two keyways, two flat keys and two tightening blocks.

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