A rotary connector and an assembly method thereof

Abstract

The invention discloses a rotary connector and an assembly method thereof. The rotary connector includes a connecting portion and a slip ring assembly, wherein the slip ring assembly is coaxially arranged with the connecting portion and is rotatably connected; the rotor assembly includes a core shaft, a rotor pressure plate and a plurality of rotor ring sheets; a rotor sliding sheet is arranged on the outer side of the rotor ring sheet; a rotor terminal sheet is arranged on the inner side of the rotor ring sheet; the stator assembly includes a stator upper pressure plate, a stator lower pressure plate, a guide connecting rod and a plurality of stator ring sheets; the plurality of stator ring sheets are located between the stator upper pressure plate and the stator lower pressure plate, and the stator upper pressure plate and the stator lower pressure plate are connected by a plurality of studs; a plurality of stator brush sheets are evenly distributed on the inner side of the stator ring sheet; a stator terminal sheet is arranged on the outer side of the stator; the rotor ring sheets and the stator ring sheets are alternately distributed along the axial direction of the core shaft; when the connecting portion rotates, the core shaft and the rotor ring sheets connected to the core shaft can be driven to rotate. The present invention can pass a large current or signal, has high precision and reliability, and is easy to assemble.

Description

Technical Field

[0001] The invention relates to the technical field of electromechanical control, and in particular to a rotary connector and an assembly method thereof. Background Art

[0002] Rotary connectors are widely used in places such as vehicle-mounted turrets and fixed turrets where power or data needs to be transmitted from a fixed position to a rotating position. Rotary connectors are electrical components responsible for connecting rotating bodies, transmitting energy and signals, and can be used for conduction, signal transmission, signal shielding, etc. Rotary connectors are usually installed at the rotation center of the equipment and are mainly composed of two parts: rotating and stationary. The rotating part connects to the rotating structure of the equipment and rotates with it, which is called the "rotor", and the stationary part connects to the energy of the fixed structure of the equipment, which is called the "stator". Although the structure of the rotary connector is simple, there are situations in which the contact resistance fluctuates greatly and is unstable during use, which affects the accuracy, and the transmission failure rate of the rotary connector is high (such as ring and brush non-conduction, ring jumping, insulation degradation, ring breakdown, poor rotation, etc.), which seriously affects the reliability of the product.

[0003] In order to meet the needs of a certain type of mortar developed by the State-owned No. 167 Factory, it is necessary to design a rotary connector that can pass large currents, with high precision and high reliability. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems of large contact resistance fluctuation, instability, high transmission failure rate and poor reliability in the existing slip ring assemblies, and to provide a rotary connector and an assembly method thereof, which can pass a large current and have high precision and reliability.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A rotary connector, comprising a connecting part and a slip ring assembly; the connecting part comprises a connecting housing and a connector, the slip ring assembly comprises a slip ring housing, a rotor assembly and a stator assembly, an axial hole is provided on a side adjacent to the connecting housing and the slip ring housing, a side of the connecting housing close to the slip ring housing is connected to a shaft sleeve, the shaft sleeve extends into the axial hole of the slip ring housing and is rotatably connected to the slip ring housing;

[0007] The rotor assembly comprises a core shaft, a rotor pressure plate and a plurality of rotor rings; the core shaft is connected to the shaft sleeve and can rotate synchronously with the shaft sleeve; the rotor ring is sleeved on the core shaft, the rotor pressure plate is located on the side of the rotor ring close to the connecting part and is connected to the core shaft through bolts, so that the rotor ring can rotate synchronously with the core shaft; a rotor sliding plate is arranged around the outer side of the rotor ring; a rotor connecting piece is arranged on the inner side of the rotor ring, and an insulating sheet is arranged between two adjacent rotor rings;

[0008] The stator assembly comprises a stator upper pressure plate, a stator lower pressure plate, a guide connecting rod and a plurality of stator rings; the lower pressure plate is fixedly connected to the slip ring outer cover, the plurality of stator rings are located between the stator upper pressure plate and the stator lower pressure plate, and are connected by a plurality of guide connecting rods, and the stator upper pressure plate and the stator lower pressure plate are connected by a plurality of studs; a plurality of stator brushes are evenly distributed around the inner side of the stator ring, and the same side of the stator brushes is in close contact with the same side of the rotor sliding plate; a stator terminal piece is provided on the outer side of the stator, and an insulating sheet is also provided between two adjacent stator rings;

[0009] The rotor ring segments and the stator ring segments are alternately distributed along the axial direction of the core shaft; the rotor connecting segments are connected to the connector through wires, and the stator connecting segments extend out of the slip ring cover after being connected to the wires; when the connecting part rotates, the core shaft and the rotor ring segments connected to the core shaft can be driven to rotate.

[0010] By setting a number of rotor rings and a number of stator rings, a rotor vane is arranged around the outer side of the rotor ring; a rotor connection piece is arranged on the inner side of the rotor ring, and an insulating piece is arranged between two adjacent rotor rings; a number of stator brush pieces are evenly distributed around the inner side of the stator ring, and the same side of the stator brush piece is in close contact with the same side of the rotor vane; a stator connection piece is arranged on the outer side of the stator, and an insulating piece is also arranged between two adjacent stator rings; the rotor rings and stator rings are alternately distributed along the axial direction of the core shaft; in this way, the same side of the stator brush piece is in close contact with the same side of the rotor vane, so that the angle of the stator brush piece has a certain redundancy, which can ensure that the rotor vane is in full contact with the stator brush piece, so that the friction torque generated is large, and due to the existence of the insulating piece, there is no interference between the adjacent rotor ring pieces and the adjacent stator ring pieces, so that a larger current can pass. After the combined ring processing, the current that the maximum power ring can pass is up to 200A. Since the number of rotor ring sheets and stator ring sheets can be selected according to the design, the rotary connector can pass currents of different sizes according to the design and can meet different usage requirements.

[0011] Furthermore, the radial length of the stator brush gradually increases or decreases around the ring plate, so that the inner end of the stator brush is distributed in an involute shape. In this way, it can ensure that the current or signal passes normally between the stator brush and the rotor vane without being affected, thereby improving the service life and reliability of the rotary connector.

[0012] Furthermore, the inner ends of the stator brushes are inclined in the same direction along the axial direction of the core shaft, so that the contact area between the stator brushes and the rotor vanes is larger, ensuring that a larger current can pass through.

[0013] Furthermore, the core shaft is a cylindrical structure, and the side wall of the core shaft protrudes outward to form a positioning protrusion; a clearance hole is provided on the rotor ring corresponding to the position of the positioning protrusion, so that the rotor ring and the core shaft are clearance-matched, so that the positioning protrusion can play a role in positioning the rotor assembly, which is convenient for assembly, and the provision of the positioning protrusion can save the material of the core shaft, thereby saving manufacturing costs.

[0014] Furthermore, there are four positioning protrusions, which are evenly distributed around the side wall of the core shaft, so that positioning is convenient.

[0015] Furthermore, the rotor vane is made of beryllium bronze material, which can play a wear-resistant role. The stator brush is made of tin bronze, which ensures that the stator brush has sufficient elasticity to contact with the rotor vane, thereby ensuring that the friction torque between the stator brush and the rotor vane is large and can pass a large current.

[0016] Furthermore, the wire connected to the rotor terminal piece extends from the inner side of the rotor and is connected to the connector after passing through the gap between the rotor and the core shaft; the wire connected to the stator terminal piece extends from the outer side of the stator and extends out of the slip ring cover, so that the structure of the rotary connector is more compact and the wiring is more reasonable.

[0017] The present invention also provides a method for assembling a rotary connector, comprising the following steps:

[0018] S1. Fix the stator lower pressure plate on the slip ring outer cover, and install the lower end of the core shaft in the middle of the stator lower pressure plate so that the core shaft can rotate relative to the stator lower pressure plate;

[0019] S2. Take a stator ring and install it on the stator lower pressure plate, then sleeve the rotor ring on the core shaft, and make the rotor sliding plate contact with the stator brush plate; repeat the above steps until the stator ring and rotor ring are installed;

[0020] S3, placing the rotor pressure plate on the rotor ring sheet and fixing the rotor pressure plate to the core shaft by bolts, so that the rotor pressure plate presses the rotor ring sheet; installing the stator upper pressure plate on the stator ring sheet and pressing the stator upper pressure plate, the stator ring sheet and the stator lower pressure plate by studs;

[0021] S4. Rotate and connect the core shaft to the connection part through a deep groove ball bearing and a sleeve, and connect the rotor terminal piece and the stator terminal piece to the wires respectively, wherein the wire connected to the rotor terminal piece extends from the inner side of the rotor ring piece and is connected to the connector after passing through the gap between the core shaft, and the wire connected to the stator terminal piece extends from the outer side of the stator ring piece and extends out of the slip ring cover to complete the assembly.

[0022] The above assembly method is used for assembly. Due to the combined design, the overlapping is carried out from bottom to top, and the bearing is connected, and the pressure plate and bolts and studs are tightened. The installation can be completed without a mold, which is convenient and fast. In addition, the insulation and conduction of each ring can be checked during the assembly process. If there is any unqualified situation, it will be reassembled to ensure that the slip ring is not scrapped.

[0023] Furthermore, the lower end of the mandrel is rotatably connected to the lower pressure plate through a sliding bearing, and the upper end is fixedly connected to the sleeve. In this way, the geometric shape, dimensional accuracy and matching clearance of the bearing matching part can be strictly controlled, thereby reducing the assembly deformation of the bearing, ensuring the position accuracy of the bearing, making the rotor mechanism have high precision, and thus making the entire rotary connector have high precision.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. By arranging a plurality of rotor ring segments and a plurality of stator ring segments, a rotor sliding piece is arranged around the outer side of the rotor ring segment; a rotor connecting piece is arranged on the inner side of the rotor ring segment, and an insulating piece is arranged between two adjacent rotor ring segments; a plurality of stator brush pieces are evenly distributed around the inner side of the stator ring segment, and the same side of the stator brush piece is in close contact with the same side of the rotor sliding piece; a stator connecting piece is arranged on the outer side of the stator, and an insulating piece is also arranged between two adjacent stator ring segments; the rotor ring segments and the stator ring segments are alternately distributed along the axial direction of the core shaft; in this way, the same side of the stator brush piece is in close contact with the same side of the rotor sliding piece, so that the angle of the stator brush piece has a certain redundancy, which can ensure that the rotor sliding piece is in full contact with the stator brush piece, so that the friction torque generated is large, and due to the presence of the insulating piece, there is no interference between adjacent rotor ring segments and adjacent stator ring segments, so that a larger current can pass.

[0026] 2. After the combined ring processing, the current of the maximum power ring can reach 200A. Since the number of rotor rings and stator rings can be selected according to the design, the rotary connector can pass currents of different sizes according to the design and meet different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a cross-sectional view of a rotary connector according to the present invention.

[0028] Figure 2 for Figure 1 Top view of the middle rotor ring.

[0029] Figure 3 for Figure 1 Top view of the center fixed ring.

[0030] In the figure: connecting cover 11, connector 12, sleeve 13, slip ring cover 21, rotor assembly 22, core shaft 221, rotor pressure plate 222, rotor ring sheet 223, rotor terminal sheet 2231, sliding bearing 224, deep groove ball bearing 225, stator assembly 23, stator upper pressure plate 231, stator lower pressure plate 232, guide connecting rod 233, stator ring sheet 234, stator brush sheet 2341, stator terminal sheet 2342, stud 235. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Example:

[0033] See also Figure 1 A rotary connector includes a connection part and a slip ring assembly. The connection part includes a connection cover 11 and a connector 12, and the slip ring assembly includes a slip ring cover 21, a rotor assembly 22 and a stator assembly 23. An axial hole is provided on the side adjacent to the connection cover 11 and the slip ring cover 21. The side of the connection cover 11 close to the slip ring cover 21 is connected to a shaft sleeve 13, and the shaft sleeve 13 extends into the axial hole of the slip ring cover 21 and is rotatably connected to the slip ring cover 21. In specific implementation, the slip ring cover 21 and the shaft sleeve 13 are connected through a deep groove ball bearing 225, so as to ensure that the shaft sleeve 13 can rotate freely relative to the slip ring cover 21, reduce friction, and strictly control the geometric shape, dimensional accuracy and matching clearance of the bearing matching part, thereby reducing the assembly deformation of the bearing, ensuring the position accuracy of the bearing, and making the rotor mechanism have high precision, so that the entire rotary connector has high precision.

[0034] See also Figure 1 and Figure 2, the rotor assembly 22 includes a core shaft 221, a rotor pressure plate 222 and a plurality of rotor rings 223. The core shaft 221 is connected to the sleeve 13 and can rotate synchronously with the sleeve 13. The rotor ring 223 is sleeved on the core shaft 221, and the rotor pressure plate 222 is located on the side of the rotor ring 223 close to the connecting part and is connected to the core shaft 221 by bolts, so that the rotor ring 223 can rotate synchronously with the core shaft 221. In specific implementation, the core shaft 221 is a cylindrical structure, and the side wall of the core shaft 221 protrudes outward to form a positioning protrusion. A clearance hole is provided on the rotor ring 223 at a position corresponding to the positioning protrusion, so that the rotor ring 223 and the core shaft 221 are clearance-matched. Preferably, there are four positioning protrusions, which are evenly distributed around the side wall of the core shaft 221. In this way, the positioning protrusion can play a role in positioning the rotor assembly 22, which is convenient for assembly, and the provision of the protrusion can save the material of the core shaft 221, thereby saving manufacturing costs. A rotor vane is arranged around the outer side of the rotor ring sheet 223. In implementation, the rotor vane is made of beryllium bronze material, which can play a wear-resistant role. A rotor terminal sheet 2231 is arranged on the inner side of the rotor ring sheet 223, and an insulating sheet is arranged between two adjacent rotor ring sheets 223. In specific implementation, one end of the core shaft 221 away from the connecting portion extends outward around the core shaft 221 to form a rotor support plate. After the rotor ring sheet 223 is sleeved on the core shaft 221, it can be located on the rotor support plate, which is convenient for installing and pressing the rotor ring sheet 223.

[0035] See also Figure 1 and Figure 3, the stator assembly 23 includes a stator upper pressure plate 231, a stator lower pressure plate 232, a guide connecting rod 233 and a plurality of stator ring sheets 234. The lower pressure plate is fixedly connected to the slip ring outer cover 21. In specific implementation, the lower pressure plate is fixedly connected to the slip ring outer cover 21 by bolts, and is located on the side of the slip ring outer cover 21 away from the connection outer cover 11. A plurality of stator ring sheets 234 are located between the stator upper pressure plate 231 and the stator lower pressure plate 232, and are connected by a plurality of guide connecting rods 233, and the stator upper pressure plate 231 and the stator lower pressure plate 232 are connected by a plurality of studs 235. In implementation, the guide connecting rod 233 is fixed on the stator lower pressure plate 232, and the guide connecting rods 233 are preferably four or six. A positioning hole is provided on the stator ring piece 234 at a position corresponding to the guide connecting rod 233. Thus, when installing the stator ring piece 234, the stator ring piece 234 can be sleeved on the guide connecting rod 233 by simply aligning the positioning hole with the guide connecting rod 233 to achieve the installation of the stator ring piece 234, making the installation convenient and reliable. A number of stator brush pieces 2341 are evenly distributed around the inner side of the stator ring piece 234, and the same side of the stator brush piece 2341 is in close contact with the same side of the rotor vane. In specific implementation, the inner end of the stator brush piece 2341 is inclined in the same direction along the axial direction of the core shaft 221, so that the contact area between the stator brush piece 2341 and the rotor vane is larger, ensuring that a larger current can pass through. The radial length of the stator brush 2341 gradually increases or decreases around the ring sheet, so that the inner end of the stator brush 2341 (the end of the stator brush 2341 close to the rotor vane is the inner end) is distributed in an involute line, so that the current or signal can pass normally between the stator brush 2341 and the rotor vane without being affected, thereby improving the service life and reliability of the rotary connector. A stator terminal 2342 is provided on the outside of the stator, and an insulating sheet is also provided between two adjacent stator ring sheets 234. Preferably, the stator brush 2341 is made of tin bronze, so that the stator brush 2341 has sufficient elastic force to contact the rotor vane, thereby ensuring that the friction torque between the stator brush 2341 and the rotor vane is large and can pass a large current.

[0036] The rotor ring segments 223 and the stator ring segments 234 are alternately distributed along the axial direction of the core shaft 221. The rotor connecting piece 2231 is connected to the connector 12 through a wire, and the stator connecting piece 2342 is connected to the wire and then extends out of the slip ring cover 21. When the connecting part rotates, it can drive the core shaft 221 and the rotor ring segment 223 connected to the core shaft 221 to rotate. During implementation, the wire connected to the rotor connecting piece 2231 extends from the inner side of the rotor and passes through the gap between the rotor and the core shaft 221 and then connects to the connector 12; the wire connected to the stator connecting piece 2342 extends from the outer side of the stator and then extends out of the slip ring cover 21, so that the structure of the rotary connector is more compact and the wiring is more reasonable.

[0037] During installation, the lower end of the mandrel 221 passes through the lower pressing plate and is rotatably connected to the lower pressing plate through the sliding bearing 224, and the upper end is fixedly connected to the sleeve 13. In specific implementation, a connecting groove is provided on the side of the sleeve 13 close to the mandrel 221, and a connecting protrusion is provided on the mandrel 221 corresponding to the connecting groove. The connecting protrusion extends into the connecting groove and is fixedly connected together by bolts, so that the mandrel 221 can rotate with the sleeve 13. In this way, the geometric shape, dimensional accuracy and matching clearance of the bearing matching part can be strictly controlled, thereby reducing the assembly deformation of the bearing, ensuring the position accuracy of the bearing, making the rotor mechanism have high precision, and thus making the entire rotary connector have high precision.

[0038] By setting a number of rotor rings and a number of stator rings, a rotor vane is arranged around the outer side of the rotor ring; a rotor connection piece is arranged on the inner side of the rotor ring, and an insulating piece is arranged between two adjacent rotor rings; a number of stator brush pieces are evenly distributed around the inner side of the stator ring, and the same side of the stator brush piece is in close contact with the same side of the rotor vane; a stator connection piece is arranged on the outer side of the stator, and an insulating piece is also arranged between two adjacent stator rings; the rotor rings and stator rings are alternately distributed along the axial direction of the core shaft; in this way, the same side of the stator brush piece is in close contact with the same side of the rotor vane, so that the angle of the stator brush piece has a certain redundancy, which can ensure that the rotor vane is in full contact with the stator brush piece, so that the friction torque generated is large, and due to the existence of the insulating piece, there is no interference between the adjacent rotor ring pieces and the adjacent stator ring pieces, so that a larger current can pass. After the combined ring processing, the current that the maximum power ring can pass is up to 200A. Since the number of rotor ring sheets and stator ring sheets can be selected according to the design, the rotary connector can pass currents of different sizes according to the design and can meet different usage requirements.

[0039] Use the following steps to assemble the rotary connector:

[0040] S1. Fix the stator lower pressing plate 232 on the slip ring outer cover 21, and install one end of the core shaft 221 in the middle of the stator lower pressing plate 232, so that the core shaft 221 can rotate relative to the stator lower pressing plate 232. Specifically, the lower end of the core shaft 221 is rotatably connected to the lower pressing plate through a sliding bearing 224.

[0041] S2, take a stator ring piece 234 and install it on the stator lower pressure plate 232, then sleeve the rotor ring piece 223 on the core shaft 221, and make the rotor sliding piece contact with the stator brush piece 2341. Repeat the above steps until the stator ring piece 234 and the rotor ring piece 223 are installed.

[0042] S3, placing the rotor pressure plate 222 on the rotor ring sheet 223 and fixing the rotor pressure plate 222 to the core shaft 221 by bolts, so that the rotor pressure plate 222 presses the rotor ring sheet 223. Installing the stator upper pressure plate 231 on the stator ring sheet 234, and pressing the stator upper pressure plate 231, the stator ring sheet 234 and the stator lower pressure plate 232 by studs 235.

[0043] S4. Connect the other end of the core shaft 221 to the connecting part, and connect the rotor terminal piece 2231 and the stator terminal piece 2342 to the wires respectively, wherein the wire connected to the rotor terminal piece 2231 extends from the inner side of the rotor ring piece 223 and is connected to the connector 12 after passing through the gap between the core shaft 221, and the wire connected to the stator terminal piece 2342 extends from the outer side of the stator ring piece 234 and extends out of the slip ring outer cover 21, thereby completing the assembly.

[0044] The above assembly method is used for assembly. Due to the combined design, the overlapping is carried out from bottom to top, and the bearing is connected, and the pressure plate and bolts and studs are tightened. The installation can be completed without a mold, which is convenient and fast. In addition, the insulation and conduction of each ring can be checked during the assembly process. If there is any unqualified situation, it will be reassembled to ensure that the slip ring is not scrapped.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the technical solution. Those skilled in the art should understand that those modifications or equivalent substitutions of the technical solution of the present invention that do not depart from the purpose and scope of the technical solution should be included in the scope of the claims of the present invention.

Claims

1. A rotary connector, comprising a connecting part and a slip ring assembly; the connecting part comprises a connecting cover and a connector, the slip ring assembly comprises a slip ring cover, a rotor assembly and a stator assembly, an axial hole is provided on a side adjacent to the connecting cover and the slip ring cover, a side of the connecting cover close to the slip ring cover is connected to a shaft sleeve, the shaft sleeve extends into the axial hole of the slip ring cover and is rotatably connected to the slip ring cover; characterized in that, The rotor assembly comprises a core shaft, a rotor pressure plate and a plurality of rotor rings; the core shaft is connected to the shaft sleeve and can rotate synchronously with the shaft sleeve; the rotor ring is sleeved on the core shaft, the rotor pressure plate is located on the side of the rotor ring close to the connecting part and is connected to the core shaft through bolts, so that the rotor ring can rotate synchronously with the core shaft; a rotor sliding plate is arranged around the outer side of the rotor ring; a rotor connecting piece is arranged on the inner side of the rotor ring, and an insulating sheet is arranged between two adjacent rotor rings; The stator assembly comprises a stator upper pressure plate, a stator lower pressure plate, a guide connecting rod and a plurality of stator ring sheets; the lower pressure plate is fixedly connected to the slip ring outer cover, and the plurality of stator ring sheets are located between the stator upper pressure plate and the stator lower pressure plate, and are connected by a plurality of guide connecting rods, and the stator upper pressure plate and the stator lower pressure plate are connected by a plurality of studs; a plurality of stator brush sheets are evenly distributed around the inner side of the stator ring sheet, and the same side of the stator brush sheet is in close contact with the same side of the rotor sliding sheet; a stator terminal sheet is provided on the outer side of the stator, and an insulating sheet is also provided between two adjacent stator ring sheets; the radial length of the stator brush sheet gradually increases or decreases around the ring sheet, so that the inner end of the stator brush sheet is distributed in an involute shape; The rotor ring segments and stator ring segments are alternately distributed along the axial direction of the core shaft; the rotor connecting segments are connected to the connector through wires, and the stator connecting segments extend out of the slip ring cover after being connected to the wires; when the connecting part rotates, it can drive the core shaft and the rotor ring segments connected to the core shaft to rotate; the core shaft is a cylindrical structure, and the side wall of the core shaft protrudes outward to form a positioning protrusion; a clearance hole is provided on the rotor ring segment at a position corresponding to the positioning protrusion, so that the rotor ring segment and the core shaft are clearance-matched.

2. The rotary connector according to claim 1, characterized in that: The inner ends of the stator brush pieces are inclined in the same direction along the axial direction of the core shaft.

3. The rotary connector according to claim 1, characterized in that: There are four positioning protrusions, which are evenly distributed around the side wall of the core shaft.

4. The rotary connector according to claim 1, characterized in that: The rotor vanes are made of beryllium bronze; the stator brushes are made of tin bronze.

5. The rotary connector according to claim 1, characterized in that: The wire connected to the rotor connecting piece extends from the inner side of the rotor and passes through the gap between the rotor and the core shaft and is connected to the connector; the wire connected to the stator connecting piece extends from the outer side of the stator and extends out of the slip ring cover.

6. The rotary connector according to claim 1, characterized in that: The lower end of the core shaft is rotatably connected to the lower pressure plate through a sliding bearing, and the upper end of the core shaft is fixedly connected to the shaft sleeve.

7. A method for assembling a rotary connector according to claim 1, characterized in that: The following steps are involved: S1. Fix the stator lower pressure plate on the slip ring outer cover, and install one end of the core shaft in the middle of the stator lower pressure plate so that the core shaft can rotate relative to the stator lower pressure plate; S2. Take a stator ring and install it on the stator lower pressure plate, then sleeve the rotor ring on the core shaft, and make the rotor sliding plate contact with the stator brush plate; repeat the above steps until the stator ring and rotor ring are installed; S3, placing the rotor pressure plate on the rotor ring sheet and fixing the rotor pressure plate to the core shaft by bolts, so that the rotor pressure plate presses the rotor ring sheet; installing the stator upper pressure plate on the stator ring sheet and pressing the stator upper pressure plate, the stator ring sheet and the stator lower pressure plate by studs; S4. Connect the other end of the core shaft to the connecting part, and connect the rotor terminal piece and the stator terminal piece to the wires respectively, wherein the wire connected to the rotor terminal piece extends from the inner side of the rotor ring piece and is connected to the connector after passing through the gap between the core shaft, and the wire connected to the stator terminal piece extends from the outer side of the stator ring piece and extends out of the slip ring cover to complete the assembly.

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