Plug-in type split expansion sleeve coupling

Abstract

The invention provides a plug-in type split expansion sleeve coupling which comprises a main split flange, an auxiliary split flange, a main split expansion sleeve hub, a main inner taper sleeve, an auxiliary split expansion sleeve hub and an auxiliary inner taper sleeve. The main split expansion sleeve hub is connected with the main split flange and the auxiliary split flange through a plurality of pin connecting pieces. The auxiliary split expansion sleeve hub is connected with the auxiliary split flange and the main split flange through a plurality of pin connecting pieces. The main split flange comprises a main split flange body provided with a notch and a main split flange petal embedded in the notch; the auxiliary split flange comprises an auxiliary split flange body provided with a notch and an auxiliary split flange petal embedded in the notch. The main split flange section and the auxiliary split flange section are symmetrically arranged; the pin connecting pieces are arranged on the main split flange and the auxiliary split flange. The mounting and positioning efficiency of the structure can be greatly improved, the external expansion force capable of being borne in the expansion process is improved, the structural safety is improved, and the force bearing effect stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical connection structures, and in particular to a plug-in split expansion sleeve coupling. Background Art

[0002] Conventional ship power systems and power generation systems are divided into two forms, one is a separate type and the other is a combined type. Among them, the separate structure is that the power system is separated from the power generation system, and the power generation system is set or installed separately in the power system; while the combined structure is that the power generation module of the power generation system is installed on the power output shaft of the power system, and power is generated during the rotation of the output shaft. In the prior art, since the power system cannot be shut down when the ship is temporarily moored and decelerated, and the standby power of the power system is large, there is a lot of energy waste. Therefore, adding a generator to the output shaft of the existing ship to convert the deceleration standby kinetic energy of the power system into electrical energy can save a lot of power generation and fuel costs. However, since the main shaft part of the ship's power system cannot be disassembled and installed and docked with the power generation equipment after installation, the installation of the power generation equipment is difficult, especially the connection part between the power generation equipment and the power main shaft. There is an urgent need for a plug-in assembly coupling to quickly install the generator on the drive shaft without changing or disassembling the ship's power system. The special plug-in assembly coupling is used, which greatly increases the clamping force of the expansion sleeve by several times compared with the traditional bolt clamping method, reduces the volume, facilitates installation, and improves reliability. The conventional structure has a small torque transmission, which can easily cause the connection structure to crack and is difficult to install. The conventional structure is difficult to meet actual needs. Summary of the invention

[0003] The purpose of the present invention is to provide a plug-in split expansion sleeve coupling in order to solve the above-mentioned problems. The preferred technical solution among the many technical solutions provided by the present invention has the following technical effects: small size, easy installation, high positioning accuracy, large torque, firm connection, high structural strength, etc., as described below for details.

[0004] To achieve the above object, the present invention provides the following technical solutions: The present invention provides a plug-in split expansion sleeve coupling, comprising a main split flange and an adjacent auxiliary split flange; A main split expansion hub is arranged on the outer side of the end surface of the main split flange, and a main inner cone sleeve is arranged inside the main split expansion hub, and the outer wall of the main inner cone sleeve is matched with the inner wall of the main split expansion hub through a cone surface; the main split expansion hub is connected to the main split flange and the auxiliary split flange through a plurality of pin connectors; A secondary split expansion hub is arranged on the outer side of the end surface of the secondary split flange, and a secondary inner cone sleeve is arranged inside the secondary split expansion hub. The outer wall of the secondary inner cone sleeve is matched with the inner wall of the secondary split expansion hub through a cone surface, and the secondary split expansion hub is connected to the secondary split flange and the main split flange through a plurality of pin connectors; The main inner cone sleeve is connected to the main split flange via main cone sleeve bolts, and the secondary inner cone sleeve is connected to the secondary split flange via secondary cone sleeve bolts; The main split flange includes a main split flange body provided with a notch through which the connecting shaft can radially pass, and a main split flange petal embedded in the notch of the main split flange body; the secondary split flange includes a secondary split flange body provided with a notch through which another connecting shaft can radially pass, and a secondary split flange petal embedded in the notch of the secondary split flange body; the main split flange petal and the secondary split flange petal are symmetrically arranged on the two flange end surfaces; the pin connectors are evenly arranged on the main split flange body and the main split flange petal and the secondary split flange body and the secondary split flange petal.

[0005] Preferably, the main split expansion sleeve hub comprises a main split expansion sleeve hub body provided with a notch through which the connecting shaft can be radially passed and a main split expansion sleeve hub petal embedded in the notch of the main split expansion sleeve hub body; the main inner tapered sleeve comprises a main inner tapered sleeve body provided with a notch through which the connecting shaft can be radially passed and a main inner tapered sleeve petal embedded in the notch of the main inner tapered sleeve body; the auxiliary split expansion sleeve hub comprises an auxiliary split expansion sleeve hub body provided with a notch through which the connecting shaft can be radially passed and an auxiliary split expansion sleeve hub petal embedded in the notch of the auxiliary split expansion sleeve hub body; the auxiliary inner tapered sleeve comprises an auxiliary inner tapered sleeve body provided with a notch through which the connecting shaft can be radially passed and an auxiliary inner tapered sleeve petal embedded in the notch of the auxiliary inner tapered sleeve body.

[0006] Optionally, the notch of each main body and the shape of the matching petal are V-shaped or straight-line, and the joints between each main body and each corresponding petal are connected by a mortise and tenon structure.

[0007] Optionally, the notches of each body and the matching petals are in an inverted V-shape or a curved shape.

[0008] Preferably, a main connecting plate is respectively provided at the two joints of the main inner conical sleeve, and two main pre-positioning bolts connected to the main inner conical sleeve are respectively provided on the main connecting plate; a secondary connecting plate is respectively provided at the two joints of the secondary inner conical sleeve, and two secondary pre-positioning bolts connected to the secondary inner conical sleeve are respectively provided on the secondary connecting plate.

[0009] Preferably, a main bearing groove is formed on one side of the inner ring of the main split flange, and a main bearing boss matching the edge of the main bearing groove is provided on one side of the inner ring of the main split expansion hub, and the main bearing boss is inserted into the main bearing groove.

[0010] Preferably, a secondary bearing groove is formed on one side of the inner ring of the secondary split flange, and a secondary bearing boss matching the edge of the secondary bearing groove is provided on one side of the inner ring of the secondary split expansion hub, and the secondary bearing boss is inserted into the secondary bearing groove.

[0011] Preferably, an annular positioning flange is provided in the middle of the auxiliary split flange, and a positioning groove is provided on the main split flange corresponding to the positioning flange.

[0012] Preferably, the main split flange is formed with a secondary clamping bolt hole that matches the secondary split flange and passes through the secondary split flange, and the secondary split flange is formed with a main clamping bolt hole that matches the pin connector that passes through the main split flange; the pin connector is an elastic pin connector.

[0013] In summary, the beneficial effects of the present invention are: 1. By setting a notch on the main split flange body and embedding the main split flange petal, and setting a notch on the secondary split flange body and embedding the secondary split flange petal, the two bodies can be quickly inserted into the connecting shaft from below, and the installation is completed by inserting each flange petal axially into the notch of each body, and there is no need to observe the installation situation below the connecting shaft, so that the installation and positioning efficiency of the present invention is extremely high, and the installation time is greatly shortened; the arrangement of multiple pin connectors on the main split flange body and the main split flange petal and the secondary split flange body and the secondary split flange petal not only ensures the tightness of the contact between the main split flange and the secondary split flange, but also enables each pin connector to evenly share the outward expansion force during the expansion process, thereby further improving the ability to withstand the outward expansion force, and further improving the safety of the structure.

[0014] 2. By setting the main bearing groove on the inner ring of the surface of the main split flange, it can match the main bearing boss and quickly position it. During the embedding process of the main inner cone sleeve, the edge of the main bearing groove can bear the load to avoid slipping, thereby further improving the stability of the bearing effect; the auxiliary bearing groove has the same function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3It is a schematic diagram of the three-dimensional structure of the explosion state of the present invention; Figure 4 It is a schematic cross-sectional view of the assembly of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the main and split flanges of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the auxiliary split flange of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the main and split expansion hub of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the auxiliary split expansion hub of the present invention.

[0017] The following are the descriptions of the reference numerals: 1. Pin connector; 2. Main inner cone sleeve; 201. Main inner cone sleeve body; 202. Main inner cone sleeve flap; 3. Main split expansion sleeve hub; 301. Main split expansion sleeve hub body; 302. Main split expansion sleeve hub flap; 4. Main split flange; 401. Main split flange body; 402. Main split flange flap; 5. Secondary split flange; 501. Secondary split flange body; 502. Secondary split flange flap; 6. Secondary split expansion sleeve hub; 601. Secondary split expansion sleeve hub body; 602, secondary split expansion sleeve hub petal; 7, secondary inner tapered sleeve; 701, secondary inner tapered sleeve body; 702, secondary inner tapered sleeve petal; 8, secondary tapered sleeve bolt; 9, secondary pre-positioning bolt; 10, secondary connecting plate; 11, primary clamping bolt hole; 12, secondary clamping bolt hole; 13, primary connecting plate; 14, primary pre-positioning bolt; 15, primary tapered sleeve bolt; 16, primary bearing groove; 17, secondary bearing groove; 18, secondary bearing boss; 19, primary bearing boss. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-Figure 3 As shown, the present invention provides a plug-in split expansion sleeve coupling, comprising a main split flange 4 and an adjacent auxiliary split flange 5.

[0020] See also Figure 1 , Figure 3 , Figure 4As shown, a main split expansion hub 3 is provided on the outer side of the end face of the main split flange 4, and a main inner tapered sleeve 2 is provided inside the main split expansion hub 3. The outer wall of the main inner tapered sleeve 2 is matched with the inner wall of the main split expansion hub 3 through a tapered surface; the main split expansion hub 3 is connected to the main split flange 4 and the auxiliary split flange 5 through a plurality of pin connectors 1.

[0021] See also Figure 2 , Figure 3 , Figure 4 As shown, a secondary split expansion hub 6 is arranged on the outer side of the end face of the secondary split flange 5, and a secondary inner tapered sleeve 7 is arranged inside the secondary split expansion hub 6. The outer wall of the secondary inner tapered sleeve 7 is matched with the inner wall of the secondary split expansion hub 6 through a tapered surface, and the secondary split expansion hub 6 is connected to the secondary split flange 5 and the main split flange 4 through a plurality of pin connectors 1.

[0022] See also Figure 3 As shown, the main inner cone sleeve 2 is connected to the main split flange 4 through the main cone sleeve bolts 15, and the secondary inner cone sleeve 7 is connected to the secondary split flange 5 through the secondary cone sleeve bolts 8.

[0023] See also Figure 3 , Figure 5 As shown, the main split flange 4 includes a main split flange body 401 with a notch through which the connecting shaft can pass radially, and a main split flange petal 402 embedded in the notch of the main split flange body 401; see Figure 3 , Figure 6 As shown, the auxiliary split flange 5 includes an auxiliary split flange body 501 having a notch through which another connecting shaft can pass radially, and an auxiliary split flange petal 502 embedded in the notch of the auxiliary split flange body 501; see Figures 1 to 3 As shown, the main split flange petal 402 and the secondary split flange petal 502 are symmetrically arranged on the two flange end faces; the pin connector 1 is evenly arranged in groups on the main split flange body 401 and the main split flange petal 402 and the secondary split flange body 501 and the secondary split flange petal 502.

[0024] See also Figure 3 , Figure 5 , Figure 6As shown, the present invention provides a notch on the main split flange body 401 and embeds the main split flange petal 402, and provides a notch on the secondary split flange body 501 and embeds the secondary split flange petal 502, so that the two bodies can be quickly inserted into the connecting shaft from the bottom with the notch facing upward, and then each flange petal is inserted axially into the notch of each body above the connecting shaft to complete the corresponding pre-installation, and there is no need to observe the installation situation below the connecting shaft; the main split flange petal 402 and the secondary split flange petal 502 are symmetrically arranged on the end faces of the two flanges, and accordingly the secondary split flange body 501 and the main split flange body 401 play an axial positioning role during pre-assembly; thereby making the installation and positioning efficiency of the present invention extremely high, greatly shortening the installation time; and after pre-installation, its own circular ring shape can be maintained, thereby facilitating the subsequent installation of bolts and other connecting parts.

[0025] Preferably, see Figure 3 , Figure 7 As shown, the main split expansion hub 3 comprises a main split expansion hub body 301 provided with a notch through which the connecting shaft can pass radially, and a main split expansion hub petal 302 embedded in the notch of the main split expansion hub body 301. Figure 3 As shown, the main inner cone sleeve 2 comprises a main inner cone sleeve body 201 with a notch through which the connecting shaft can pass radially, and a main inner cone sleeve petal 202 embedded in the notch of the main inner cone sleeve body 201. Figure 3 , Figure 8 As shown, the auxiliary split expansion hub 6 comprises an auxiliary split expansion hub body 601 having a notch through which the connecting shaft can pass radially, and an auxiliary split expansion hub petal 602 embedded in the notch of the auxiliary split expansion hub body 601. Figure 3 As shown, the secondary inner cone sleeve 7 comprises a secondary inner cone sleeve body 701 provided with a notch through which the connecting shaft can pass radially, and a secondary inner cone sleeve petal 702 embedded in the notch of the secondary inner cone sleeve body 701. With such a structural design, the main split expansion sleeve hub 3, the main inner cone sleeve 2, the secondary split expansion sleeve hub 6, and the secondary inner cone sleeve 7 can all be pre-installed in the same manner as the main split flange 4 and the secondary split flange 5, without observing the installation condition below the connecting shaft. The main split expansion sleeve hub petal 302 embedded in the notch of the main split expansion sleeve hub body 301 and the main inner cone sleeve petal 202 embedded in the notch of the main inner cone sleeve body 201 are symmetrically arranged with the main split flange petal 402 on the end face, and the auxiliary split expansion sleeve hub petal 602 embedded in the notch of the auxiliary split expansion sleeve hub body 601 and the auxiliary inner cone sleeve petal 702 embedded in the notch of the auxiliary inner cone sleeve body 701 are symmetrically arranged with the auxiliary split flange petal 502 on the end face, thereby realizing mutual axial positioning, further improving the installation positioning efficiency of the present invention and shortening the installation time; and after pre-installation, it can maintain its own circular ring shape, which is convenient for the subsequent installation of bolts and other connecting parts.

[0026] See also Figures 1 to 3As shown, multiple pin connectors 1 of the present invention are arranged on the main split flange body 401 and the main split flange petal 402 and the auxiliary split flange body 501 and the auxiliary split flange petal 502, which not only ensures the tightness of the contact between the main split flange 4 and the auxiliary split flange 5, but also enables each pin connector 1 to evenly distribute the outward expansion force during the expansion process, further improving the ability of the present invention to withstand the outward expansion force, so that the safety of the structure is further improved.

[0027] See also Figures 1 to 3 as well as Figures 5 to 8 The notches of each body of the present invention and the corresponding petals can be in a V-shaped (main split flange petal 402, secondary split flange petal 502) or a straight line (main inner cone sleeve petal 202, main split expansion sleeve hub petal 302, secondary split expansion sleeve hub petal 602 and secondary inner cone sleeve petal 702), or in an inverted V-shaped or curved shape. When in an inverted V-shaped or curved shape, the shape of each body itself can achieve the corresponding radial positioning. See Figures 1 to 3 as well as Figures 5 to 8 When it is V-shaped or linear, the joints between each body and each corresponding petal are connected by mortise and tenon structure, so as to achieve corresponding radial positioning. When assembling the structure, the connection of mortise and tenon structure makes the positioning fast. After the mortise and tenon structure bears the pre-connection force and then assembles the bolts to fix it, it can greatly improve the installation and positioning efficiency of the structure, shorten the installation time, and facilitate the subsequent fixing operation.

[0028] See also Figure 3 , Figure 4 The main inner cone sleeve 2 is connected to the main split flange 4 through the main cone sleeve bolts 15, and the secondary inner cone sleeve 7 is connected to the secondary split flange 5 through the secondary cone sleeve bolts 8. Figure 5 The main split flange 4 has a main bearing groove 16 formed on one side of the inner ring; see Figure 7 The inner ring side of the main split expansion hub 3 is provided with a main bearing boss 19 matching the edge of the main bearing groove 16, and the main bearing boss 19 is inserted into the main bearing groove 16; see Figure 3 , Figure 4 In this way, during the process of pressing the main inner cone sleeve 2, the main bearing boss 19 and the edge of the main bearing groove 16 can be engaged to transfer the outward expansion force borne on the main split expansion sleeve hub 3 to the main split flange 4, thereby achieving the effect of dispersing the force. Figure 6 The inner ring side of the secondary split flange 5 is formed with a secondary bearing groove 17, see Figure 8 A secondary bearing boss 18 matching the edge of the secondary bearing groove 17 is provided on one side of the inner ring of the secondary split expansion sleeve hub 6, and the secondary bearing boss 18 is inserted into the secondary bearing groove 17; see Figure 3 , Figure 4With such arrangement, in the process of pressing the secondary inner cone sleeve 7, the outward expansion force borne on the secondary split expansion sleeve hub 6 can be transferred to the secondary split flange 5 through the engagement of the secondary load-bearing boss 18 and the edge of the secondary load-bearing groove 17, thereby dispersing the force.

[0029] The present invention sets a main load-bearing groove 16 on the inner ring of the surface of the main split flange 4, which can match the main load-bearing boss 19 for quick positioning. During the embedding process of the main inner tapered sleeve 2, the edge of the main load-bearing groove 16 can bear the load to avoid slipping, thereby further improving the stability of the load-bearing effect; the secondary load-bearing groove 17 has the same function.

[0030] See also Figure 3 A main connecting plate 13 is respectively provided at the two butt joints of the main inner cone sleeve 2, and two main pre-positioning bolts 14 for connecting the main inner cone sleeve 2 are respectively provided on the main connecting plate 13, and threaded holes matching the main pre-positioning bolts 14 are formed on the main split flange 4; a secondary connecting plate 10 is respectively provided at the two butt joints of the secondary inner cone sleeve 7, and two secondary pre-positioning bolts 9 for connecting the secondary inner cone sleeve 7 are respectively provided on the secondary connecting plate 10, and threaded holes matching the secondary pre-positioning bolts 9 are formed on the secondary split flange 5.

[0031] See also Figure 3 , Figure 4 As shown, an annular positioning flange is provided in the middle of the auxiliary split flange 5, and a positioning groove is provided on the main split flange 4 corresponding to the positioning flange. After such arrangement, after the main split flange 4 and the auxiliary split flange 5 are pre-positioned, the positions of the auxiliary split flange 5 and the main split flange 4 can be quickly stabilized by clamping the positioning flange and the positioning groove, which facilitates the subsequent connection of the pin connector 1.

[0032] See also Figure 3 As shown, the main split flange 4 is formed with a secondary clamping bolt hole 12 that matches and passes through the secondary split flange 5 , and the secondary split flange 5 is formed with a main clamping bolt hole 11 that matches and passes through the pin connector 1 of the main split flange 4 .

[0033] 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.

Claims

1. A plug-in split expansion sleeve coupling, comprising a main split flange (4) and an adjacent secondary split flange (5); A main split expansion hub (3) is arranged on the outer side of the end surface of the main split flange (4), a main inner conical sleeve (2) is arranged inside the main split expansion hub (3), and the outer wall of the main inner conical sleeve (2) and the inner wall of the main split expansion hub (3) are matched through a conical surface; the main split expansion hub (3) is connected to the main split flange (4) and the auxiliary split flange (5) through a plurality of pin connectors (1); An auxiliary split expansion hub (6) is arranged on the outer side of the end surface of the auxiliary split flange (5), and an auxiliary inner conical sleeve (7) is arranged inside the auxiliary split expansion hub (6). The outer wall of the auxiliary inner conical sleeve (7) and the inner wall of the auxiliary split expansion hub (6) are matched through a conical surface. The auxiliary split expansion hub (6) is connected to the auxiliary split flange (5) and the main split flange (4) through a plurality of pin connectors (1); The main inner cone sleeve (2) is connected to the main split flange (4) via a main cone sleeve bolt (15), and the secondary inner cone sleeve (7) is connected to the secondary split flange (5) via a secondary cone sleeve bolt (8); It is characterized in that The main split flange (4) comprises a main split flange body (401) provided with a notch through which a connecting shaft can pass radially, and a main split flange flap (402) embedded in the notch of the main split flange body (401); the secondary split flange (5) comprises a secondary split flange body (501) provided with a notch through which another connecting shaft can pass radially, and a secondary split flange flap (502) embedded in the notch of the secondary split flange body (501); the main split flange flap (402) and the secondary split flange flap (502) are symmetrically arranged on two flange end surfaces; the pin connector (1) is arranged on the main split flange body (401) and the main split flange flap (402) and the secondary split flange body (501) and the secondary split flange flap (502).

2. The plug-in split expansion sleeve coupling according to claim 1 is characterized in that: The main split expansion sleeve hub (3) comprises a main split expansion sleeve hub body (301) provided with a notch capable of radially passing through a connecting shaft, and a main split expansion sleeve hub flap (302) embedded in the notch of the main split expansion sleeve hub body (301); the main inner cone sleeve (2) comprises a main inner cone sleeve body (201) provided with a notch capable of radially passing through a connecting shaft, and a main inner cone sleeve flap (202) embedded in the notch of the main inner cone sleeve body (201); the auxiliary split expansion sleeve hub (6) comprises an auxiliary split expansion sleeve hub body (601) provided with a notch capable of radially passing through a connecting shaft, and an auxiliary split expansion sleeve hub flap (602) embedded in the notch of the auxiliary split expansion sleeve hub body (601); the auxiliary inner cone sleeve (7) comprises an auxiliary inner cone sleeve body (701) provided with a notch capable of radially passing through a connecting shaft, and an auxiliary inner cone sleeve flap (702) embedded in the notch of the auxiliary inner cone sleeve body (701).

3. The plug-in split expansion sleeve coupling according to any one of claims 1 or 2, characterized in that: The notches of the main bodies and the corresponding petals are in a V-shape or a straight line shape, and the joints between the main bodies and the corresponding petals are connected by a mortise and tenon structure.

4. The plug-in split expansion sleeve coupling according to any one of claims 1 or 2, characterized in that: The notches of each body and the matching petals are in an inverted V shape or a curve shape.

5. The plug-in split expansion sleeve coupling according to claim 1, characterized in that: A main connecting plate (13) is respectively provided at two butt joints of the main inner cone sleeve (2), and two main pre-positioning bolts (14) connected to the main inner cone sleeve (2) are respectively provided on the main connecting plate (13); a secondary connecting plate (10) is respectively provided at two butt joints of the secondary inner cone sleeve (7), and two secondary pre-positioning bolts (9) connected to the secondary inner cone sleeve (7) are respectively provided on the secondary connecting plate (10).

6. The plug-in split expansion sleeve coupling according to claim 1, characterized in that: A main load-bearing groove (16) is formed on one side of the inner ring of the main split flange (4), and a main load-bearing boss (19) matching the edge of the main load-bearing groove (16) is provided on one side of the inner ring of the main split expansion hub (3), and the main load-bearing boss (19) is inserted into the main load-bearing groove (16).

7. The plug-in split expansion sleeve coupling according to claim 1, characterized in that: A secondary load-bearing groove (17) is formed on one side of the inner ring of the secondary split flange (5), and a secondary load-bearing boss (18) matching the edge of the secondary load-bearing groove (17) is provided on one side of the inner ring of the secondary split expansion hub (6), and the secondary load-bearing boss (18) is inserted into the interior of the secondary load-bearing groove (17).

8. The plug-in split expansion sleeve coupling according to claim 1, characterized in that: An annular positioning flange is provided in the middle of the auxiliary split flange (5), and a positioning groove is provided on the main split flange (4) corresponding to the positioning flange.

9. The plug-in split expansion sleeve coupling according to claim 1, characterized in that: The main split flange (4) is formed with a secondary clamping bolt hole (12) that matches and passes through the secondary split flange (5), and the secondary split flange (5) is formed with a main clamping bolt hole (11) that matches and passes through the main split flange (4) of the pin connector (1); the pin connector (1) is an elastic pin connector.

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