Coupling for air compressor

Abstract

The invention provides a coupler for an air compressor, and relates to the technical field of couplings, the coupler comprises a first connecting part, a second connecting part and an elastic body, the end, close to the second connecting part, of the first connecting part is provided with a first protrusion, and the end, close to the first connecting part, of the second connecting part is provided with a second protrusion; an elastic body is arranged between the first protrusion and the second protrusion, the two sides of the first protrusion and the two sides of the second protrusion are arranged to be in a circular arc shape, and the side faces of the two sides between the adjacent first protrusion and the second protrusion are machined into circular arcs with the radius being R through a circular milling cutter. The circular milling cutter can machine the two sides, close to each other, of the two first protrusions or the two second protrusions at the same time, so that the machining time can be greatly saved, the two sides of the sawteeth on the elastic body are arcs with the radius being R, the width of the tooth roots of the sawteeth is larger than that of the tooth tops of the sawteeth, the exteriors of the sawteeth can bear large force, and the service life of the sawteeth is prolonged. The service life of the elastomer is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of couplings, and in particular to a coupling for an air compressor. Background Art

[0002] At present, the elastic elements in the elastomeric coupling are of two types: built-in and external. Among them, the built-in elastomeric coupling is cost-effective and versatile. The simple design makes the installation easier and more efficient. However, the disadvantage is that during maintenance, the shaft extension parts at both ends of the coupling must be completely disengaged before the elastomer can be taken out, and it needs to be re-aligned when reinstalled.

[0003] The external coupling can quickly and easily replace the elastomer without moving the sleeve or re-aligning the motor or reducer, which shortens the downtime for maintenance. However, the elastomer teeth of the existing external coupling are designed in a straight line, and only the fillet is designed at the root of the tooth to eliminate stress. It is still insufficient in torque transmission and cannot provide a relatively large speed. Summary of the invention

[0004] The purpose of the present invention is to provide a coupling for an air compressor to solve the technical problem in the prior art that the elastic body of the external buckle coupling is unevenly stressed, resulting in a relatively short service life. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a coupling for an air compressor, comprising a first connecting part, a second connecting part, and an elastomer, wherein a first protrusion is provided at one end of the first connecting part close to the second connecting part, and a second protrusion is provided at one end of the second connecting part close to the first connecting part, both sides of the first protrusion and both sides of the second protrusion are arranged in an arc shape, and the side surfaces on both sides between two adjacent first protrusions and second protrusions are processed into an arc with a radius of R by a circular milling cutter, the serrations on the elastomer are inserted between the first protrusion and the second protrusion from the outside, and both sides of the serrations of the elastomer are arranged in an arc shape with a radius of R, so that the width of the root of the serrations is greater than the width of the top of the teeth.

[0007] Preferably, the arc formed by the tooth roots of two adjacent first protrusions and the second protrusions is smaller than or equal to a semicircle.

[0008] Preferably, both ends of the elastic body are flush with each other, a fixing hoop is provided on the outer side of the elastic body, and a fastening head is provided on the fixing hoop.

[0009] Preferably, a groove is provided on the outer side of the elastic body, the groove penetrates along the height direction of the elastic body, and the fastening head is confined in the groove.

[0010] Preferably, the groove bottom plate is provided with a threaded hole, and the fastening head is installed in the threaded hole.

[0011] Preferably, both ends of the elastic body are provided with steps, and when the elastic body is buckled, the two steps buckle to form an arc surface.

[0012] Preferably, a fastener is further included, and the fastener is fixed on the step.

[0013] Preferably, the first connecting portion is provided with a first through hole along the length direction, the second connecting portion is provided with a second through hole along the length direction, and the first through hole is coaxial with the second through hole.

[0014] The technical solution provided by this application document includes the following beneficial effects:

[0015] The present invention provides a coupling for an air compressor, comprising a first connecting part, a second connecting part, and an elastic body, wherein the first connecting part and the second connecting part are used to connect with a rotating shaft. To facilitate the transmission of force, a first protrusion is provided at one end of the first connecting part close to the second connecting part, and a second protrusion is provided at one end of the second connecting part close to the first connecting part, and the first protrusion and the second protrusion are locked. However, the first connecting part and the second connecting part are rigidly connected, and collision is prone to occur between the two. To reduce the collision between the two, an elastic body is provided between the first protrusion and the second protrusion, that is, the elastic body is inserted between the adjacent first protrusion and the second protrusion from the outside, and the elastic body buffers the force between the first protrusion and the second protrusion. To facilitate the smooth separation of the elastic body from the first protrusion and the second protrusion, the two sides of the first protrusion and the two sides of the second protrusion are set to be arc-shaped, and the side surfaces on both sides between the two adjacent first protrusions and the second protrusion are processed into arcs with a radius of R by a circular milling cutter, that is, during processing, the circular milling cutter can process the two first protrusions at the same time. The first protrusion or the two second protrusions are close to each other on both sides, which can greatly save processing time. At the same time, in order to enable the elastomer to fill the gap between the first protrusion and the second protrusion, the two sides of the serration on the elastomer are also arcs with a radius of R, so that the width of the root of the sawtooth is greater than the width of the tooth top, so that the serration on the strip-shaped elastomer can fill the space between the first protrusion and the second protrusion. Since the force on the position of the sawtooth close to the middle of the first connecting part is relatively small, and the force on the outside is relatively large, the side of the sawtooth is set to an arc shape, resulting in the width of the tooth top of the sawtooth being smaller than the width of the tooth bottom, so that the outside of the sawtooth can withstand a relatively large force, thereby extending the service life of the elastomer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a structural schematic diagram of a coupling provided in Embodiment 1 of the present invention;

[0018] Figure 2 is a schematic diagram showing an exploded structure of a coupling according to an exemplary embodiment;

[0019] Figure 3 is a schematic structural diagram showing an elastic body according to an exemplary embodiment;

[0020] Figure 4 is a schematic structural diagram showing another elastic body according to an exemplary embodiment;

[0021] Figure 5 is a schematic structural diagram showing a second connecting portion according to an exemplary embodiment.

[0022] In the figure: 1, first connecting part; 11, first protrusion; 12, first through hole; 2, second connecting part; 21, second connecting part; 22, second through hole; 3, elastic body; 31, groove; 32, step; 33, serration; 4, fixing hoop; 5, fastening head. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0024] This specific implementation provides a coupling, which solves the technical problem in the prior art that the elastic body of the external buckle coupling is subjected to uneven force, resulting in a relatively short service life.

[0025] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims. In addition, the entire contents of the configurations shown in the following embodiments are not limited to the solutions required as the invention described in the claims.

[0026] Reference Figure 1-Figure 5The present invention provides a coupling for an air compressor, comprising a first connecting part 1, a second connecting part 2, and an elastic body 3, wherein the first connecting part and the second connecting part are used to be connected to a rotating shaft. In order to facilitate the transmission of force, a first protrusion 11 is provided at one end of the first connecting part 1 close to the second connecting part 2, and a second protrusion 21 is provided at one end of the second connecting part 2 close to the first connecting part 1, and the first protrusion and the second protrusion are engaged with each other. However, the first connecting portion 1 and the second connecting portion 2 are rigidly connected, and collision between the two is prone to occur. In order to reduce the collision between the two, an elastic body is arranged between the first protrusion 11 and the second protrusion 21, that is, the elastic body 3 is inserted between the adjacent first protrusions 11 and the second protrusions 21 from the outside, and the elastic body buffers the force between the first protrusion and the second protrusion. In order to facilitate the elastic body 3 to be smoothly separated from the first protrusion 11 and the second protrusion 21, the two sides of the first protrusion 11 and the two sides of the second protrusion 21 are set to be arc-shaped, and the side surfaces on both sides between the two adjacent first protrusions 11 and the second protrusion 21 are processed into arcs with a radius of R by a circular milling cutter, that is, during processing, the circular milling cutter can process the two first protrusions 11 at the same time. Or the two sides of the two second protrusions 21 are close to each other, which can greatly save processing time. At the same time, in order to enable the elastomer 3 to fill the gap between the first protrusion 11 and the second protrusion 21, the two sides of the serration 33 on the elastomer 2 are also arcs with a radius of R, so that the width of the root of the serration 33 is greater than the width of the tooth top, so that the serration 33 on the strip-shaped elastomer 2 can fill the space between the first protrusion 11 and the second protrusion 21. Since the force applied to the serration 33 close to the middle of the first connecting part is relatively small, while the force applied to the outside is relatively large, the side surface of the serration 33 is set to an arc shape, resulting in the width of the tooth top of the serration 33 being smaller than the width of the tooth bottom, so that the outside of the serration 33 can withstand a relatively large force, thereby extending the service life of the elastomer 3.

[0027] In this way, since the two ends of the sawtooth 33 are arranged in an arc shape, so that the width of the tooth top of the sawtooth 33 is smaller than the width of the tooth bottom, it is ensured that the bottom of the sawtooth 33 can withstand a relatively large force, thereby increasing the rotation speed of the shaft, and also extending the service life of the rubber strip 3, and avoiding the situation of violent removal in the prior art.

[0028] A further optimization scheme is adopted. In order to facilitate the serration 33 on the elastomer 3 to be pulled out from the gap between the first protrusion 11 and the second protrusion 21, the arc formed by the tooth roots of two adjacent first protrusions 11 and the second protrusion 21 is less than or equal to a semicircle. This causes the cross-sectional area of ​​the serration 33 of the elastomer 3 to gradually increase, so that the elastomer 3 can be pulled out quickly.

[0029] According to a further optimization scheme, both ends of the elastomer 3 are flush with each other, a fixing hoop 4 is provided on the outer side of the elastomer 3, and a fastening head 5 is provided on the fixing hoop 4, so that the fastening head 5 fixes the fixing hoop 4 to the outer periphery of the elastomer 3 to prevent the elastomer 3 from loosening.

[0030] To further optimize the solution, in order to prevent the fastening head 5 from moving, a groove 31 is provided on the outer side of the elastomer, and the groove 31 penetrates along the height direction of the elastomer 3, and the fastening head 5 is confined in the groove 31. This can prevent the coupling from moving when in use, thereby ensuring the stability of the elastomer 3.

[0031] According to a further optimized solution, a threaded hole is provided on the bottom plate of the groove 31, and the fastening head 5 is installed in the threaded hole.

[0032] Another method for fixing the elastomer 3 is also provided. Steps 32 are provided at both ends of the elastomer 3. When the elastomer 3 is buckled, the two steps 32 are buckled together so that the elastomer 3 is connected end to end to form a ring, which is convenient for people to fix. In order to ensure that the two ends of the elastomer are firmly fixed, people can set fastening screws at the position of the steps to avoid separation of the two steps 32.

[0033] A further optimized solution is to facilitate the connection of the rotating shafts at both ends of the coupling, the first connecting part 1 is provided with a first through hole 12 along the length direction, the second connecting part 2 is provided with a second through hole 22 along the length direction, and the first through hole 12 is coaxial with the second through hole 22, so as to realize the coaxial rotation of the two shafts.

[0034] It should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. used herein to indicate positions or positional relationships based on the positions 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

[0037] It is to be understood that the same or similar parts in the above embodiments can refer to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments. The multiple schemes provided in this application include their own basic schemes, which are independent of each other and do not restrict each other, but they can also be combined with each other without conflict to achieve multiple effects together.

[0038] Although the embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present application. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A coupling for an air compressor, characterized in that: The invention comprises a first connecting portion (1), a second connecting portion (2), and an elastic body (3), wherein a first protrusion (11) is provided at one end of the first connecting portion (1) close to the second connecting portion (2), and a second protrusion (21) is provided at one end of the second connecting portion (2) close to the first connecting portion (1), both sides of the first protrusion (11) and both sides of the second protrusion (21) are arranged in an arc shape, and the side surfaces on both sides between two adjacent first protrusions (11) and second protrusions (21) are processed into an arc with a radius of R by a circular milling cutter, and the saw teeth (33) on the elastic body (3) are inserted from the outside between the first protrusion (11) and the second protrusion (21), and both sides of the saw teeth (33) of the elastic body (3) are arranged in an arc shape with a radius of R, so that the width of the tooth root of the saw teeth (33) is greater than the width of the tooth top.

2. The air compressor coupling according to claim 1, characterized in that: The arc formed by the tooth roots of two adjacent first protrusions (11) and second protrusions (21) is smaller than or equal to a semicircle.

3. The air compressor coupling according to claim 1, characterized in that: The two ends of the elastic body (3) are flush with each other, a fixing hoop (4) is arranged on the outside of the elastic body (3), and a fastening head (5) is arranged on the fixing hoop (4).

4. The air compressor coupling according to claim 3, characterized in that: A groove (31) is provided on the outer side of the elastic body (3), the groove (31) penetrates along the height direction of the elastic body (3), and the fastening head (5) is confined in the groove (31).

5. The air compressor coupling according to claim 4, characterized in that: The bottom plate of the groove (31) is provided with a threaded hole, and the fastening head (5) is installed in the threaded hole.

6. The air compressor coupling according to claim 1, characterized in that: Both ends of the elastic body (3) are provided with steps (32); when the elastic body (3) is buckled, the two steps (32) buckle together to form an arc-shaped surface.

7. The air compressor coupling according to claim 6, characterized in that: Also included is a fastener, which is fixed on the step (32).

8. The air compressor coupling according to claim 1, characterized in that: The first connecting portion (1) is provided with a first through hole (12) along the length direction, the second connecting portion (2) is provided with a second through hole (22) along the length direction, and the first through hole (12) and the second through hole (22) are coaxial.

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