Universal separated expansion coupling

Abstract

The utility model discloses a universal separated expansion coupling, which comprises two connecting units, each connecting unit comprises a connecting cylinder, a taper sleeve, a compression ring and a locking screw, one end of the connecting cylinder is provided with a connecting cylinder screw hole, the surface of the circumferential inner wall of the connecting cylinder is a connecting cylinder conical surface, the compression ring is provided with a plurality of compression ring through holes, and the locking screw is provided with a locking screw. Screw rods of a plurality of locking screws penetrate through a plurality of pressing ring through holes and then are connected with a plurality of connecting cylinder screw holes, the surface of the circumferential inner wall of the pressing ring is a pressing ring conical surface, two conical sleeve conical surfaces are formed on the surface of the circumferential outer wall of the conical sleeve, and the two conical sleeve conical surfaces are tightly attached to the connecting cylinder conical surface and the pressing ring conical surface respectively. The transmission sleeve is installed between the other ends of the two connecting cylinders and is in transmission connection with the two connecting cylinders. On the premise that only a plurality of taper sleeves with different inner diameters need to be arranged, universality is achieved, a plurality of couplings do not need to be arranged, application is convenient, and application cost is reduced; the two taper sleeve conical surfaces are designed on the surface of the circumferential outer wall of the taper sleeve, so that the connection stability of the countershaft is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coupling production, and specifically relates to an expansion coupling, in particular to a universal separate expansion coupling. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, rotates together during the transmission of motion and power, and does not disengage under normal circumstances. An expansion coupling is a coupling that is connected to the shaft by expansion, and is the most common coupling. A separate expansion coupling is an expansion coupling with two connection units, and the two connection units are connected by a transmission sleeve to achieve transmission connection. This coupling is suitable for applications where the two shafts have their own positioning function.

[0003] Traditional expansion couplings generally use a structure in which a compression ring and an expansion sleeve are used together. The compression ring and the expansion sleeve are designed for shafts of specific diameters and cannot be used to connect shafts of different diameters. If you want to connect shafts of different sizes, you need to replace the expansion sleeves and compression rings of different sizes, which makes them less versatile and increases the application cost because of the need to equip multiple couplings. Utility Model Content

[0004] The purpose of the utility model is to provide a universal split expansion coupling in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A universal split expansion coupling comprises two connecting units, a transmission sleeve is arranged between the two connecting units, the connecting unit comprises a connecting tube, a tapered sleeve, a pressure ring and a locking screw, one end of the cylindrical and circumferentially closed connecting tube is provided with a plurality of connecting tube screw holes distributed along the circumferential direction, the circumferential inner wall surface of the connecting tube is a connecting tube conical surface, the annular pressure ring is provided with a plurality of pressure ring through holes distributed along the circumferential direction, the screw rods of the plurality of locking screws respectively pass through the plurality of pressure ring through holes and are connected with the plurality of connecting tube screw holes, the circumferential inner wall surface of the pressure ring is a pressure ring conical surface, the positions close to the two ends of the cylindrical tapered sleeve are respectively placed in the connecting tube and the pressure ring, the middle part of the circumferential wall of the tapered sleeve gradually thins toward the two ends and forms two tapered sleeve conical surfaces on the circumferential outer wall surface of the tapered sleeve, the two tapered sleeve conical surfaces are respectively tightly fitted with the connecting tube conical surface and the pressure ring conical surface, the transmission sleeve is installed between the other ends of the two connecting tubes and are transmission-connected to each other.

[0007] Preferably, in order to achieve a reliable buffer transmission connection between the two connecting tubes, the other ends of the two connecting tubes are respectively provided with a plurality of connecting tube bosses extending outward and arranged along the circumferential direction, and the plurality of connecting tube bosses of the two connecting tubes are staggered with each other in the circumferential direction. The transmission sleeve made of elastomer includes a transmission sleeve and a plurality of transmission protrusions evenly arranged on the circumferential outer wall of the transmission sleeve, and there is one transmission protrusion between every two adjacent connecting tube bosses.

[0008] Preferably, in order to facilitate the positioning of the transmission sleeve, one end or both ends of the transmission protrusion are provided with an outwardly protruding protrusion column, and the end of the connecting tube is located in the area between two adjacent connecting tube protrusions and a limiting countersunk hole is provided at a position corresponding to the protrusion column, and the protrusion column is placed in the corresponding limiting countersunk hole.

[0009] Preferably, in order to achieve a better coordinated transmission effect, each of the transmission protrusions is in arc contact with the adjacent coupling tube protrusion.

[0010] Preferably, in order to enable the tapered sleeve to achieve a reliable radial retraction locking function during the axial movement of the pressure ring and the connecting tube, an axial opening is provided on the circumferential wall of the tapered sleeve.

[0011] The beneficial effects of the utility model are:

[0012] The utility model designs a connecting cylinder, a tapered sleeve, a pressure ring and a locking screw that cooperate with each other, and forms a conical surface contact structure between the tapered sleeve and the pressure ring, and between the tapered sleeve and the connecting cylinder respectively. When the pressure ring and the connecting cylinder are locked by the locking screw, both ends of the tapered sleeve are squeezed and contracted, thereby realizing a reliable connection function to the shaft. In application, it is only necessary to select tapered sleeves with different inner diameters according to the actual outer diameter of the shaft to realize the universal function of the connecting cylinder, the pressure ring and the locking screw, so that the coupling has universality under the premise of only needing to be equipped with a plurality of tapered sleeves with different inner diameters, and does not need to be equipped with a plurality of sets of couplings, which is convenient for application and reduces the application cost. Two tapered sleeve conical surfaces are designed on the circumferential outer wall surface of the tapered sleeve, which is conducive to the connecting cylinder and the pressure ring to realize a more reliable extrusion and locking function on the tapered sleeve, thereby improving the connection stability to the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional exploded view of the universal split expansion coupling of the utility model before assembly;

[0014] Figure 2 It is a stereoscopic diagram of the universal split expansion coupling of the utility model after assembly;

[0015] Figure 3 It is a top view of the universal split expansion coupling of the utility model after assembly;

[0016] Figure 4 yes Figure 3 AA section enlarged view in. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] like Figure 1-Figure 4 As shown, the universal split expansion coupling of the utility model comprises two connection units 1, a transmission sleeve 2 is arranged between the two connection units 1, the connection unit 1 comprises a connection cylinder 16, a cone sleeve 15, a pressure ring 11 and a locking screw 10, one end of the cylindrical and circumferentially closed connection cylinder 16 is provided with a plurality of connection cylinder screw holes 17 distributed along the circumferential direction, the circumferential inner wall surface of the connection cylinder 16 is a connection cylinder conical surface (not marked in the figure), a plurality of pressure ring through holes 12 distributed along the circumferential direction are arranged on the annular pressure ring 11, and the screws of the plurality of locking screws 10 respectively pass through the plurality of pressure holes 17. The ring through hole 12 is connected to multiple connecting tube screw holes 17. The circumferential inner wall surface of the pressure ring 11 is a pressure ring conical surface (not marked in the figure). The positions close to the two ends of the cylindrical cone sleeve 15 are respectively placed in the connecting tube 16 and the pressure ring 11. The middle part of the circumferential wall of the cone sleeve 15 gradually becomes thinner toward the two ends and forms two cone sleeve conical surfaces (not marked in the figure) on the circumferential outer wall surface of the cone sleeve 15. The two cone sleeve conical surfaces are tightly fitted with the connecting tube conical surface and the pressure ring conical surface respectively. The transmission sleeve 2 is installed between the other ends of the two connecting tubes 16 and are connected to each other in transmission.

[0019] like Figure 1-Figure 4 As shown, the utility model also discloses the following more optimized specific structures:

[0020] In order to realize a reliable buffer transmission connection between the two connecting cylinders 16, the other ends of the two connecting cylinders 16 are respectively provided with a plurality of connecting cylinder bosses 18 extending outward and arranged along the circumferential direction. The plurality of connecting cylinder bosses 18 of the two connecting cylinders 16 are staggered with each other in the circumferential direction. The transmission sleeve 2 made of elastomer includes a transmission sleeve 21 and a plurality of transmission protrusions 22 evenly arranged on the circumferential outer wall of the transmission sleeve 21. There is a transmission protrusion 22 between every two adjacent connecting cylinder bosses 18.

[0021] In order to facilitate the positioning of the transmission sleeve 2, one end (or both ends) of the transmission protrusion 22 is provided with an outwardly protruding protrusion column 20, and the end of the connecting tube 16 is located in the area between two adjacent connecting tube protrusions 18 and a limiting countersunk hole 19 is provided at a position corresponding to the protrusion column 20, and the protrusion column 20 is placed in the corresponding limiting countersunk hole 19.

[0022] In order to achieve a better transmission effect, each transmission projection 22 is in arc contact with the adjacent coupling tube projection 18 .

[0023] In order to enable the tapered sleeve 15 to achieve a reliable radial inward contraction locking function during the axial movement of the pressure ring 11 and the connecting tube 16 , an axial opening 14 is provided on the circumferential wall of the tapered sleeve 15 .

[0024] Figure 1-Figure 4 Also shown are a plurality of mounting screw holes 13 disposed on the pressure ring 11, which are used for connection with other equipment and are conventional adaptive structures.

[0025] like Figure 1-Figure 4 As shown, when used, one end of two shafts (not shown in the figure, their diameters can be the same or different, and the inner diameters of the two cone sleeves 15 are different at the same time) is placed in the central through holes of the two cone sleeves 15 respectively; then the multiple locking screws 10 of one connection unit 1 are tightened respectively, and the tightening is completed by tightening diagonally in sequence; then the other connection unit 1 is locked and connected in the same way. After the connection is completed, the connection cylinder 16 and the pressure ring 11 squeeze and lock the two ends of the cone sleeve 15 respectively, and the radial pressure is transmitted to the corresponding shaft through the cone sleeve 15, generating static friction on the shaft surface, so that the coupling is in a stable and reliable working state, thus realizing the rotation transmission connection function between the two shafts. The axial positioning of the two shafts is generally determined by other connection structures of the shafts themselves, and does not need to be realized by this coupling, so this coupling does not have the function of axial positioning of the two shafts, but only needs to realize the circumferential transmission (i.e., rotation transmission) function of the two shafts.

[0026] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A universal split expansion coupling, comprising two connection units, with a transmission sleeve disposed between the two connection units, characterized in that: The connecting unit comprises a connecting cylinder, a tapered sleeve, a pressure ring and a locking screw. One end of the cylindrical and circumferentially closed connecting cylinder is provided with a plurality of connecting cylinder screw holes distributed along the circumferential direction. The circumferential inner wall surface of the connecting cylinder is a connecting cylinder conical surface. The annular pressure ring is provided with a plurality of pressure ring through holes distributed along the circumferential direction. The screw rods of the plurality of locking screws respectively pass through the plurality of pressure ring through holes and are connected with the plurality of connecting cylinder screw holes. The circumferential inner wall surface of the pressure ring is a pressure ring conical surface. The positions close to the two ends of the cylindrical tapered sleeve are respectively placed in the connecting cylinder and the pressure ring. The middle part of the circumferential wall of the tapered sleeve gradually becomes thinner toward the two ends and forms two tapered sleeve conical surfaces on the circumferential outer wall surface of the tapered sleeve. The two tapered sleeve conical surfaces are respectively tightly fitted with the connecting cylinder conical surface and the pressure ring conical surface. The transmission sleeve is installed between the other ends of the two connecting cylinders and are transmission connected to each other.

2. The universal split expansion coupling according to claim 1 is characterized in that: The other ends of the two connecting tubes are respectively provided with a plurality of connecting tube bosses extending outward and arranged along the circumferential direction, and the plurality of connecting tube bosses of the two connecting tubes are staggered with each other in the circumferential direction. The transmission sleeve made of elastomer includes a transmission sleeve and a plurality of transmission protrusions evenly arranged on the circumferential outer wall of the transmission sleeve, and there is one transmission protrusion between every two adjacent connecting tube bosses.

3. The universal split expansion coupling according to claim 2 is characterized in that: One end or both ends of the transmission protrusion are provided with an outwardly protruding protrusion column, and the end of the connecting tube is located in the area between two adjacent connecting tube protrusions and a limiting countersunk hole is provided at a position corresponding to the protrusion column, and the protrusion column is placed in the corresponding limiting countersunk hole.

4. The universal split expansion coupling according to claim 2 is characterized in that: Each of the transmission protrusions is in arc surface contact with the adjacent coupling tube protrusion.

5. The universal split expansion coupling according to any one of claims 1 to 4, characterized in that: An axial opening is arranged on the circumferential wall of the cone sleeve.

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