Flange coupling with expansion sleeve

Abstract

The flange coupling with the expansion sleeves comprises two half couplings which are coaxially connected through fastening bolts, the inner walls of the two half couplings are connected with the expansion sleeves through screws, the outer walls of the two expansion sleeves are arranged in an inclined mode and are tightly attached to the inner walls of the half couplings, and the outer walls of the two expansion sleeves are connected with the inner walls of the half couplings. The expansion sleeve is driven to move towards the inner wall of the semi-coupling through screw installation, and the inclined outer wall of the expansion sleeve is limited and extruded by the inner wall of the semi-coupling to be folded so as to tightly connect a shaft sleeve of equipment. According to the flange coupler, a traditional key groove connection mode of the shaft and the hub is changed into an expansion sleeve connection mode, so that the coupler can be rapidly installed and fixed, the service life of the expansion sleeve is long, the expansion sleeve loses the connection function in the overload process, equipment can be protected against damage, the expansion sleeve connection can bear multiple loads, and the service life of the flange coupler is prolonged. And the structure can be made into various types, so that later replacement and maintenance are facilitated, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of coupling application technology, and in particular to a flange coupling with an expansion sleeve. Background Technology

[0002] A traditional flanged coupling is a rigid coupling. It consists of two flanged half-couplings connected to two shafts respectively with ordinary flat keys, and then bolted together to transmit motion and torque.

[0003] The main drawbacks of keyway connections for two shafts are as follows: First, stress concentration occurs at the junction of the key and keyway, leading to excessive local stress and affecting the fatigue strength and lifespan of the connection. This is especially true for flange couplings, which inherently have misalignment issues, amplifying this defect. Second, the machining and installation requirements are relatively high. The machining of the keyway requires high tolerances for the key, keyway, and shaft hole. Generally, interference fits require heating and cooling during installation, which weakens the shaft's strength. Furthermore, some tight keys, such as wedge keys, need to be driven in during assembly, resulting in poor alignment between the shaft and hub. There are also issues such as inability to withstand axial forces and frictional wear. Therefore, this invention proposes a flange coupling with an expansion sleeve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a flange coupling with an expansion sleeve, which improves the problems of stress concentration, excessive local stress, and difficult processing and installation in the traditional keyway connection of flange couplings.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: providing a flange coupling with an expansion sleeve, comprising two half-couplings coaxially connected by fastening bolts, wherein the inner walls of the two half-couplings are each connected with an expansion sleeve by screws;

[0006] Both of the expansion sleeves have their outer walls inclined and fit tightly against the inner wall of the half-connector. The expansion sleeves are driven by screw installation to move toward the inner wall of the half-connector. Their inclined outer walls are squeezed and constricted by the inner wall of the half-connector to form a tight connection with the bushing of the equipment.

[0007] The present invention is further configured such that: each of the two half-connectors is integrally provided with a connecting plate at its opposite connecting ends, and the two connecting plates are bolted together by a plurality of fastening bolts evenly arranged in the circumferential direction.

[0008] The above technical solution facilitates the connection and fixation of the two equipment shafts using bolts after the half-connection is installed.

[0009] The present invention is further configured such that: the two opposite connecting ends of the two half-connectors are respectively provided with grooves and protrusions, and the grooves and protrusions are configured to cooperate with each other.

[0010] The above technical solution facilitates the coaxial alignment of the two halves through the grooves and protrusions when connecting and fixing them, thereby improving the stability of the two halves during operation.

[0011] The present invention is further configured such that: an installation groove is provided on the inner wall of the half-joint near the middle position, and the inner wall is inclined, and is also inclinedly fitted to the outer wall of the expansion sleeve.

[0012] The above technical solution allows the expansion sleeve, which is set with an inclined surface, to shrink and deform inside the mounting groove during movement, thereby wrapping and fixing the internal shaft.

[0013] The present invention is further configured such that: an installation part is provided on the inner wall of the half-joint and on the end face of the installation groove; an installation ring is integrally provided on the end face of the expansion sleeve; and the installation ring is installed on the installation part by screws.

[0014] The above technical solution facilitates the stable movement of the expansion sleeve by using the mounting ring during installation and fixing. After reaching a certain position, the mounting ring is fixed in place by screws to ensure its stability during use.

[0015] The present invention is further configured such that the connection between the mounting ring and the outer wall of the expansion sleeve is arc-shaped.

[0016] The above technical solution facilitates the plastic deformation at the arc-shaped connection when the expansion sleeve is driven and fixed, thereby facilitating the compression and fixing between the expansion sleeve and the shaft.

[0017] The present invention is further configured such that the inner wall of the expansion sleeve is fixedly connected with multiple anti-slip protrusions.

[0018] The above technical solution allows the inner wall of the expansion sleeve to be fitted onto the shaft, and multiple anti-slip protrusions can enhance the coefficient of friction between the expansion sleeve and the outer wall of the shaft, thereby improving the connection strength.

[0019] The beneficial effects of this utility model are as follows:

[0020] This utility model proposes a flange coupling with an expansion sleeve. By changing the traditional keyway connection between the shaft and hub in the flange coupling to an expansion sleeve connection, the coupling can be quickly installed and fixed. The expansion sleeve has a long service life and will lose its connection function under overload, thus protecting the equipment from damage. The expansion sleeve connection can withstand multiple loads, and its structure can be made in various styles, which facilitates later replacement and maintenance and reduces maintenance costs. Attached Figure Description

[0021] Figure 1 This is a structural diagram of a flange coupling with an expansion sleeve according to the present invention;

[0022] Figure 2 This is a cross-sectional view of a flange coupling with an expansion sleeve according to the present invention;

[0023] Figure 3 This is a cross-sectional view of a flange coupling with an expansion sleeve according to the present invention.

[0024] Figure 4 This is a structural diagram of one half of a flange coupling with an expansion sleeve according to the present invention.

[0025] Figure 5 This is a structural diagram of the other half of a flange coupling with an expansion sleeve according to the present invention;

[0026] Figure 6 This is a structural diagram of the expansion sleeve in a flange coupling with an expansion sleeve according to the present invention.

[0027] In the diagram: 1. Half-joint; 11. Groove; 12. Protrusion; 13. Mounting groove; 14. Mounting part; 2. Expansion sleeve; 21. Mounting ring; 3. Fastening bolt. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] like Figures 1-3As shown, a flange coupling with an expansion sleeve includes two half-couplings 1 coaxially connected by fastening bolts 3. Each half-coupling 1 has a connecting disc integrally formed at its opposite connecting end. The two connecting discs are bolted together by a plurality of fastening bolts 3 evenly arranged in the circumferential direction, facilitating the connection and fixation of the two equipment shafts after installation. The opposite connecting ends of the two half-couplings 1 are respectively provided with grooves 11 and protrusions 12, which are fitted together to ensure coaxial alignment during connection and fixation, thereby improving the stability of the two half-couplings 1 during operation.

[0030] like Figures 3-6 As shown, the inner walls of both half-joints 1 are connected to expansion sleeves 2 by screws. Multiple anti-slip protrusions are fixedly connected to the inner walls of the expansion sleeves 2, which enhance the friction coefficient between the expansion sleeves 2 and the outer wall of the shaft when the inner walls of the expansion sleeves 2 are fitted onto the shaft, thereby improving the connection's firmness. The outer walls of both expansion sleeves 2 are inclined and fit tightly against the inner walls of the half-joints 1. An installation groove 13 is provided near the center of the inner wall of the half-joints 1, and the inner wall is also inclined, fitting at an angle against the outer walls of the expansion sleeves 2. This allows the inclined expansion sleeves 2 to contract and deform within the installation groove 13 during movement, thus wrapping and fixing the shaft inside. The expansion sleeves 2 are moved towards the inner wall of the half-joints 1 by screw installation. Its inclined outer wall is squeezed and constricted by the inner wall of the half-connector 1 to form a tight connection with the shaft sleeve of the equipment. The inner wall of the half-connector 1 and the end face of the mounting groove 13 are provided with a mounting part 14. The end face of the expansion sleeve 2 is integrally provided with a mounting ring 21. The connection between the mounting ring 21 and the outer wall of the expansion sleeve 2 is arc-shaped, which allows it to achieve a certain plastic deformation at the arc-shaped connection when the expansion sleeve 2 is driven and fixed, thereby facilitating the compression and fixing between the expansion sleeve 2 and the shaft. The mounting ring 21 is installed in the mounting part 14 by screws, which allows the expansion sleeve 2 to move stably when it is installed and fixed. After reaching a certain position, the mounting ring 21 is fixed in the position of the mounting part 14 by screws to ensure its stability during use.

[0031] In use, the two half-connectors 1 are first installed on the shafts of the two devices using the bolt holes on their end faces. Then, the two expansion sleeves 2 are installed inside the mounting groove 13. The mounting ring 21 is moved by the screw, which drives the expansion sleeve 2 to move inside the mounting groove 13. The interaction between the inclined surface of the expansion sleeve and the inclined surface of the inner wall of the mounting groove 13 can achieve shrinkage and deformation, thereby tightly wrapping and fixing the shaft inside. Finally, the two half-connectors 1 are connected and fixed using fastening bolts 3.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A flange coupling with expansion sleeve, comprising two half-couplings (1) connected coaxially by means of fastening bolts (3), characterized in that: The inner walls of both half-sections (1) are connected to expansion sleeves (2) by screws. The outer walls of both expansion sleeves (2) are inclined and fit tightly against the inner wall of the half-connector (1). The expansion sleeves (2) are driven by screw installation to move towards the inner wall of the half-connector (1). The inclined outer walls are squeezed by the inner wall of the half-connector (1) to form a tight connection with the bushing of the equipment.

2. A flange coupling with an expansion sleeve according to claim 1, characterized in that: Both of the two half-connectors (1) are integrally provided with connecting discs at their opposite connection ends, and the two connecting discs are bolted together by a plurality of fastening bolts (3) evenly arranged in the circumferential direction.

3. A flange coupling with an expanding sleeve according to claim 2, characterized in that: The two half-connectors (1) are respectively provided with grooves (11) and protrusions (12) at their opposite connecting ends, and the grooves (11) and protrusions (12) are arranged to cooperate with each other.

4. The flange coupling with expansion sleeve according to claim 1, characterized in that: The inner wall of the half-joint (1) is provided with an installation groove (13) near the middle position, and the inner wall is inclined and is in close contact with the outer wall of the expansion sleeve (2) at an angle.

5. A flange coupling with an expanding sleeve as claimed in claim 4, characterized in that: The inner wall of the half-joint (1) and the end face of the mounting groove (13) are provided with a mounting part (14), and the end face of the expansion sleeve (2) is integrally provided with a mounting ring (21), which is installed on the mounting part (14) by screws.

6. A flange coupling with an expansion sleeve according to claim 5, characterized in that: The connection between the mounting ring (21) and the outer wall of the expansion sleeve (2) is arc-shaped.

7. A flange coupling with an expansion sleeve according to claim 6, characterized in that: The inner wall of the expansion sleeve (2) is fixedly connected with multiple anti-slip protrusions.

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