Electromagnetic shielding transmission shaft device

Abstract

The present application provides an electromagnetic shielding transmission shaft device, including: a power input connection section, which is made of conductive and magnetic metal material, and a first shaft connection part is arranged at one end thereof; a transmission section, which is a hollow structure and is made of conductive and magnetic metal material, and a second shaft connection part is arranged at one end of the transmission section facing the first shaft connection part, and a solid shielding structure is arranged in the inner hole, and the first shaft connection part and the second shaft connection part are connected by an insulating connection part; a shielding shell, which is sleeved on the end of the transmission section away from the first shaft connection part, and an electromagnetic anti-leakage device is arranged inside the shielding shell; the shielding shell is also connected to the electromagnetic shielding cover of the equipment; a mounting frame provides support for the shielding shell. The present application is suitable for scenarios that require both large load and high speed power transmission, and strong electromagnetic pulse interference that must be shielded and isolated between the power equipment and the load / intermediate transmission equipment, or for conducting electromagnetic compatibility tests on the power equipment.

Description

Technical Field

[0001] The present application relates to the technical field of transmission shaft devices, and in particular, to an electromagnetic shielding transmission shaft device. Background Art

[0002] The drive shaft is a mechanical device that transmits power in the transmission system of mechanical equipment. It is generally used for the connection and power transmission between the power equipment that generates mechanical rotation and the load equipment. The drive shaft can be classified according to the material, structure, working condition, purpose and characteristics. It has a rich variety and a wide range of application scenarios. It is an important component for power transmission in the transmission system of vehicles, aircraft, ships and industrial machinery and equipment.

[0003] The electromagnetic shielding transmission shaft device is a transmission shaft device that can transmit the rotation and torque generated by the power equipment to the load / intermediate transmission equipment, while achieving electromagnetic isolation and shielding between the power equipment and the load / intermediate transmission equipment. It is mainly used in scenarios where there is strong electromagnetic pulse interference between the power equipment and the load / intermediate transmission equipment that must be shielded or where electromagnetic compatibility testing of the power equipment is carried out.

[0004] Existing electromagnetic shielding transmission shaft devices generally consist of a transmission shaft and a shielding shell. The input connection end of the transmission shaft is connected to the power equipment, and the power output connection end of the transmission shaft is connected to the load equipment or the intermediate transmission equipment, thereby realizing the function of transmitting the rotation and torque generated by the power equipment to the load equipment or the intermediate transmission equipment. The transmission shaft as a whole is made of an insulating material that is not conductive or magnetic, so as to prevent electromagnetic signals from being conducted and leaking through the transmission shaft body. The shielding shell is installed on the outside of the conductive and magnetic metal transmission structure connected to the power output connection end of the transmission shaft, and the brush is installed between the metal transmission structure and the shielding shell to prevent electromagnetic signals from leaking through the gap between the metal transmission structure and the shielding shell. The shielding shell is connected to the electromagnetic shielding cover of the load / intermediate transmission equipment and forms a shielding whole, thereby realizing electromagnetic shielding and isolation between the power equipment and the load / intermediate transmission equipment.

[0005] The main structure of the transmission shaft of the existing electromagnetic shielding transmission shaft device is an insulating material that is not conductive or magnetic, and is generally a non-metallic structure. It is restricted by the mechanical properties and safety and reliability of its material and cannot meet the use requirements under complex and harsh conditions such as high load and high speed. Summary of the invention

[0006] The present application provides an electromagnetic shielding transmission shaft device, which aims to solve the technical problem that the existing electromagnetic shielding transmission shaft device cannot meet the use requirements under complex and harsh conditions such as high load and high speed.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An electromagnetic shielding transmission shaft device, comprising:

[0009] The power input connection section is made of conductive and magnetic metal material, and one end of the power input connection section is provided with a first shaft connection portion;

[0010] The transmission section is a hollow structure and is made of conductive and magnetic metal. The second shaft connection part is arranged at one end of the transmission section facing the first shaft connection part, and a solid shielding structure is arranged in the inner hole. The first shaft connection part and the second shaft connection part are connected by an insulating connection part.

[0011] The shielding shell is made of conductive and magnetic metal material and is sleeved on one end of the transmission section away from the first shaft connection portion. The shielding shell is provided with an electromagnetic leakage prevention device that cooperates with the outer peripheral wall of the transmission section to prevent electromagnetic signals from leaking through the gap between the shielding shell and the shaft hole of the transmission section. The shielding shell is connected to the electromagnetic shielding cover of the load / intermediate transmission device at one end away from the power input connection section.

[0012] The mounting frame is connected to the shielding shell to provide support for the shielding shell.

[0013] Furthermore, the shielding shell comprises:

[0014] Shielding shell cover;

[0015] The shielding shell seat is located below the shielding shell cover and is connected to the shielding shell cover as a whole through a first bolt. The shielding shell seat is fixedly connected to the mounting frame through a second bolt below.

[0016] Furthermore, a conductive mesh or an electromagnetic shielding coating is provided between the connecting surfaces of the shielding shell cover and the shielding shell seat.

[0017] Furthermore, the electromagnetic leakage prevention device includes a brush, and bosses are provided at both ends of the interior of the shielding shell extending toward the outer peripheral surface of the transmission section, and the brushes are provided on the bosses and in contact with the outer peripheral surface of the transmission section.

[0018] Furthermore, the first shaft connection portion and the second shaft connection portion are both flange-type shaft connection portions.

[0019] Furthermore, the insulating connecting component comprises:

[0020] An insulating pad is sandwiched between the first shaft connection portion and the second shaft connection portion, wherein the insulating pad is embedded in a first countersunk hole in the middle of the first shaft connection portion on one side of the insulating pad facing the first shaft connection portion, a second countersunk hole matching the second shaft connection portion is provided in the middle of the side of the insulating pad facing the second shaft connection portion, and a plurality of through holes are evenly provided at the bottom of the second countersunk hole along the circumferential direction;

[0021] The insulating sleeve is sequentially inserted into the flange hole of the first shaft connecting portion and the through hole of the insulating pad;

[0022] The screw is inserted into the flange hole and the insulating sleeve of the second shaft connecting part in sequence, and then the first shaft connecting part, the insulating pad and the second shaft connecting part are connected as a whole through the nut.

[0023] Furthermore, the first shaft connection part is an internal spline connection part, and the second shaft connection part is an external spline connection part that cooperates with the internal spline connection part to achieve transmission.

[0024] Furthermore, the insulating connecting component comprises:

[0025] An insulating pad, sandwiched between the opposite end faces of the inner spline connection part and the outer spline connection part, and having a shape matching the shape of the inner spline hole of the inner spline connection part;

[0026] The insulating spline sleeve is sleeved between the inner spline hole and the outer spline shaft of the inner spline connecting part and the outer spline connecting part.

[0027] Furthermore, a clamping groove is arranged in the inner spline hole of the inner spline connecting part, and an insulating limit clamping ring is arranged in the clamping groove to limit the axial relative position of the outer spline shaft and the inner spline hole.

[0028] Furthermore, the surface of the solid shielding structure is also coated with an electromagnetic shielding coating.

[0029] Compared with the prior art, this application has the following beneficial effects:

[0030] The present application provides an electromagnetic shielding transmission shaft device, including a power input connection section, a transmission section, a shielding shell, and a mounting frame, wherein the power input connection section is made of a conductive and magnetic metal material, and a first shaft connection portion is arranged at one end thereof; the transmission section is a hollow structure and is made of a conductive and magnetic metal material, and a second shaft connection portion is arranged at one end of the transmission section facing the first shaft connection portion, and a solid shielding structure is arranged in the inner hole, and the first shaft connection portion and the second shaft connection portion are connected by an insulating connecting component; the shielding shell is made of a conductive and magnetic metal material, and is sleeved on one end of the transmission section away from the first shaft connection portion, and an electromagnetic leakage prevention device is arranged inside the shielding shell to cooperate with the outer peripheral wall of the transmission section to prevent electromagnetic signals from leaking through the gap in the shaft hole between the shielding shell and the transmission section; the end of the shielding shell away from the power input connection section is connected to the electromagnetic shielding cover of the load / intermediate transmission equipment; the mounting frame is connected to the shielding shell to provide support for the shielding shell. The main structure of the electromagnetic shielding transmission shaft device provided by the present application is made of conductive and magnetic metal materials, which can not only meet the use requirements under traditional complex and harsh conditions such as large loads and high speeds, but also have excellent electromagnetic shielding and isolation effects, higher safety and reliability and a wider range of applications. It has a simple structure, convenient processing, low cost, and is easy to install and maintain. It is very suitable for scenarios that require power transmission with large loads and high speeds, and require strong electromagnetic pulse interference that must be shielded and isolated between the power equipment and the load / intermediate transmission equipment, or to conduct electromagnetic compatibility tests on the power equipment as a whole.

[0031] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 The figure is a schematic diagram of the appearance structure of a preferred embodiment of the present invention.

[0034] Figure 2 It is a partial cross-sectional schematic diagram of a preferred embodiment of the present invention.

[0035] Figure 3 This is a cross-sectional schematic diagram of another preferred embodiment of the present invention when the first shaft connection portion is an internal spline connection portion.

[0036] Figure 4 This is a cross-sectional schematic diagram of another preferred embodiment of the present invention when the second shaft connection portion is an external spline connection portion.

[0037] Figure 5 It is a schematic front view of an insulating pad in another preferred embodiment of the present invention.

[0038] Figure 6 It is a schematic cross-sectional view of an insulating spline sleeve in another preferred embodiment of the present invention.

[0039] In the figure: 1. power input connection section; 2. transmission section; 3. insulation pad; 4. insulation sleeve; 5. screw; 6. nut; 7. shielding shell seat; 8. shielding shell cover; 9. brush; 10. first bolt; 11. conductive mesh; 12. second bolt; 13. mounting frame; 14. solid shielding structure; 15. insulating spline sleeve. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] Reference Figure 1 The preferred embodiment of the present invention provides an electromagnetic shielding transmission shaft device, comprising a power input connection section 1, a transmission section 2, a shielding shell, and a mounting frame 13, wherein:

[0042] The power input connection section 1 is made of conductive and magnetic metal material, and a first shaft connection portion is provided at one end thereof;

[0043] The transmission section 2 is a hollow structure and is made of conductive and magnetic metal. The transmission section 2 is provided with a second shaft connection portion at one end facing the first shaft connection portion, and a solid shielding structure 14 is provided in the inner hole. The first shaft connection portion and the second shaft connection portion are connected by an insulating connection component.

[0044] The shielding shell is made of conductive and magnetic metal material and is sleeved on the end of the transmission section 2 away from the first shaft connection portion. The shielding shell is provided with an electromagnetic leakage prevention device that cooperates with the outer peripheral wall of the transmission section 2 to prevent electromagnetic signals from leaking through the gap between the shielding shell and the shaft hole of the transmission section 2; the end of the shielding shell away from the power input connection section 1 is connected to the electromagnetic shielding cover of the load / intermediate transmission equipment;

[0045] The mounting frame 13 is connected to the shielding shell to provide support for the shielding shell.

[0046] The present embodiment provides an electromagnetic shielding transmission shaft device, including a power input connection section 1, a transmission section 2, a shielding shell, and a mounting bracket 13, wherein: the power input connection section 1 is made of conductive and magnetic metal material, and a first shaft connection portion is arranged at one end thereof; the transmission section 2 is a hollow structure and is made of conductive and magnetic metal material, a second shaft connection portion is arranged at one end of the transmission section 2 facing the first shaft connection portion, and a solid shielding structure 14 is arranged in the inner hole, and the first shaft connection portion and the second shaft connection portion are connected by an insulating connecting component; the shielding shell is made of conductive and magnetic metal material, and is sleeved on one end of the transmission section 2 away from the first shaft connection portion, and an electromagnetic leakage prevention device is arranged inside the shielding shell to cooperate with the outer peripheral wall of the transmission section 2 to prevent electromagnetic signals from leaking through the gap in the shaft hole between the shielding shell and the transmission section 2; the end of the shielding shell away from the power input connection section 1 is connected to the electromagnetic shielding cover of the load / intermediate transmission equipment; the mounting bracket 13 is connected to the shielding shell to provide support for the shielding shell. It can be seen that in the present application, since the power input connection section 1 and the transmission section 2 are both made of conductive and magnetic metal materials, they can meet the use requirements under traditional complex and harsh conditions such as large loads and high speeds. In addition, in order to achieve electromagnetic shielding, this embodiment has been improved in three aspects: First, the power input connection section 1 and the transmission section 2 are connected by insulating connecting components. While meeting the power transmission of large loads and high speeds, it also avoids electromagnetic conduction due to direct contact between the power input connection section 1 and the transmission section 2, thereby achieving electromagnetic shielding and isolation; Second, the present application provides a solid shielding structure 14 in the inner hole of the hollow structure of the transmission section 2 to further prevent electromagnetic signals Leakage occurs through the inner hole of the transmission section 2; on the third aspect, a shielding shell made of conductive and magnetic metal material is sleeved on the end of the transmission section 2 away from the first shaft connection part, and the shielding shell is internally provided with an electromagnetic leakage prevention device that cooperates with the outer peripheral wall of the transmission section 2 to prevent the electromagnetic signal from leaking through the gap between the shielding shell and the shaft hole of the transmission section 2, and is also connected to the electromagnetic shielding cover of the load / intermediate transmission equipment, so that the transmission section 2, the shielding shell and the electromagnetic shielding cover of the load / intermediate transmission equipment form a shielding whole, thereby achieving electromagnetic shielding and isolation between the power input connection terminal 1 and the load / intermediate transmission equipment, and then achieving electromagnetic shielding and isolation between the power equipment and the load / intermediate transmission equipment.

[0047] In a preferred embodiment of the present application, the shielding shell comprises:

[0048] The shielding shell cover 8 is made of conductive and magnetic metal material;

[0049] The shielding shell base 7 is made of conductive and magnetic metal material, is located below the shielding shell cover 8 and is connected to the shielding shell cover 8 as a whole through a first bolt 10 , and the bottom of the shielding shell base 7 is fixedly connected to the mounting frame 13 through a second bolt 12 .

[0050] A conductive mesh rib 11 or an electromagnetic shielding coating is provided between the connecting surfaces of the shielding shell cover 8 and the shielding shell base 7 .

[0051] The electromagnetic leakage prevention device includes a brush 9 . Bosses are provided at both ends of the shielding shell and extend toward the outer peripheral surface of the transmission section 2 . The brush 9 is provided on the bosses and contacts the outer peripheral surface of the transmission section 2 .

[0052] In this embodiment, the shielding shell includes a shielding shell seat 7 and a shielding shell cover 8, and the shielding shell seat 7 and the shielding shell cover 8 are both made of conductive and magnetic metal. Brushes 9 are installed on the bosses at both ends of the inner side of the shielding shell seat 7 and the shielding shell cover 8 close to the transmission section 2. The brushes 9 are used to seal the electromagnetic gap between the shielding shell seat 7, the shielding shell cover 8 and the axial hole of the transmission section 2, so that the transmission section 2 and the shielding shell seat 7 and the shielding shell cover 8 form a shielding whole, preventing the electromagnetic signal from passing through the gap between the shielding shell seat 7, the shielding shell cover 8 and the axial hole of the transmission section 2. Leakage occurs, the shielding shell seat 7 and the shielding shell cover 8 are fixed by the first bolt 10, and the conductive mesh 11 is installed on the contact surface between the shielding shell seat 7 and the shielding shell cover 8. The conductive mesh 11 is used to seal the electromagnetic gap between the shielding shell seat 7 and the shielding shell cover 8 to prevent the electromagnetic signal from leaking through the gap of the contact surface between the shielding shell seat 7 and the shielding shell cover 8. Of course, the electromagnetic shielding coating can also be used to achieve the corresponding purpose; the shielding shell seat 7 is fixed on the mounting frame 13 by the second bolt 12 to play a stabilizing role. The shielding shell seat 7 and the shielding shell cover 8 are connected to the electromagnetic shielding cover of the load / intermediate transmission equipment at one end away from the power input connection section 1, so that the transmission section 2, the shielding shell seat 7, the shielding shell cover 8 and the electromagnetic shielding cover of the load / intermediate transmission equipment form a shielding whole, so that the power input connection end 1 and the load / intermediate transmission equipment are electromagnetically shielded and isolated, and finally the power equipment and the load / intermediate transmission equipment are electromagnetically shielded and isolated.

[0053] like Figure 2 As shown, in a preferred embodiment of the present application, the first shaft connection portion and the second shaft connection portion both adopt flange shaft connection portions. In this case, the insulating connection component includes an insulating pad 3, an insulating sleeve 4, a screw 5, and a nut 6, wherein:

[0054] The insulating pad 3 is circular in shape as a whole and is sandwiched between the first shaft connection part and the second shaft connection part. The side of the insulating pad 3 facing the first shaft connection part is embedded in the first countersunk hole in the middle of the first shaft connection part. The middle part of the side of the insulating pad 3 facing the second shaft connection part is provided with a second countersunk hole matching with the second shaft connection part, and the bottom of the second countersunk hole is evenly provided with a plurality of through holes along the circumferential direction.

[0055] The insulating sleeve 4 is sequentially inserted into the flange hole of the first shaft connecting portion and the through hole of the insulating pad 3;

[0056] After the screw 5 is inserted into the flange hole of the second shaft connection part and the insulating sleeve 4 in sequence, the first shaft connection part, the insulating pad 3 and the second shaft connection part are connected as a whole through the nut 6.

[0057] In this embodiment, the power input connection end 1 and the transmission section 2 are connected through a flange-type shaft connection to transmit power. The insulating pad 3 is installed between the power input connection end 1 and the transmission section 2 to electrically isolate the power input connection end 1 and the transmission section 2 to prevent the power input connection end 1 and the transmission section 2 from direct contact and electromagnetic conduction. The insulating sleeve 4 is installed in the flange hole and through hole of the power input connection end 1 and the insulating pad 3. The screw 5 passes through the insulating sleeve 4 and is connected and fixed with the nut 6. The insulating sleeve 4 can prevent the screw 5 and the nut 6 from direct contact with the power input connection end 1 to generate electromagnetic conduction. The right end of the transmission section 2 is the power output connection end. The right end of the transmission section 2 can be connected to a load / intermediate transmission device to achieve the function of transmitting power.

[0058] In a preferred embodiment of the present application, the first shaft connection portion is an internal spline connection portion (see Figure 3 ), the second shaft connection portion adopts an external spline connection portion that cooperates with the internal spline connection portion to realize transmission (see Figure 4 ), in this case, the insulating connecting component comprises:

[0059] Insulation pad 3, the shape of which matches the shape of the internal spline hole of the internal spline connection part (see Figure 5 ), sandwiched between the opposite end faces of the inner spline connection portion and the outer spline connection portion;

[0060] Insulation spline sleeve 15 (see Figure 6 ), which is sleeved between the inner spline hole and the outer spline shaft of the inner spline connection part and the outer spline connection part.

[0061] Different from the above-mentioned embodiment, the power input connection end 1 and the transmission section 2 of this embodiment are connected through a spline connection part to transmit power, that is, the first shaft connection part is an internal spline connection part, and the second shaft connection part adopts an external spline connection part that cooperates with the internal spline connection part to realize transmission. Since the internal spline connection part and the external spline connection part are both magnetic and conductive metal materials, in order to avoid electromagnetic conduction between the two, this embodiment specially arranges an insulating pad 3 between the opposite end faces of the internal spline connection part and the external spline connection part for electromagnetic isolation. At the same time, an insulating pad 3 is also arranged between the internal spline hole and the external spline shaft of the internal spline connection part and the external spline connection part. An insulating spline sleeve is arranged in between so that the matching spline teeth and the spline insulation isolation are no longer in direct contact, thereby realizing electromagnetic isolation, eliminating electromagnetic conduction between the inner spline connection part and the outer spline connection part, and achieving the effect of electromagnetic shielding. During installation, the insulating spline sleeve 15 can be firstly sleeved on the outer spline shaft, and then the insulating spline sleeve 11 and the outer spline shaft are inserted into the inner spline hole together until they are against the insulating pad 3. In order to prevent the outer spline shaft from axially separating from the inner spline hole, a groove can be arranged in the inner spline hole of the inner spline connection part, and an insulating limit ring can be arranged in the groove to limit the axial relative position of the outer spline shaft and the inner spline hole.

[0062] In addition, in a preferred embodiment of the present application, the surface of the solid shielding structure 14 is also coated with an electromagnetic shielding coating to further prevent the electromagnetic signal from leaking through the inner hole of the transmission section 2. There are currently many types of electromagnetic shielding coatings on the market, and engineers in this field can make corresponding choices based on actual needs, which will not be repeated here.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic shielding transmission shaft device, characterized in that: include: The power input connection section (1) is made of a conductive and magnetic metal material, and one end of the power input connection section is provided with a first shaft connection portion; The transmission section (2) is a hollow structure and is made of a conductive and magnetic metal material. The transmission section (2) is provided with a second shaft connection portion at one end facing the first shaft connection portion, and a solid shielding structure (14) is provided in the inner hole. The first shaft connection portion and the second shaft connection portion are connected by an insulating connection component, wherein: The first shaft connection part and the second shaft connection part are both flange-type shaft connection parts, and the insulating connection part includes: An insulating pad (3) is sandwiched between the first shaft connection part and the second shaft connection part, the insulating pad (3) is embedded in a first countersunk hole in the middle of the first shaft connection part on the side facing the first shaft connection part, a second countersunk hole matching the second shaft connection part is arranged in the middle of the side facing the second shaft connection part of the insulating pad (3), and a plurality of through holes are evenly arranged at the bottom of the second countersunk hole along the circumferential direction; An insulating sleeve (4) is sequentially inserted into a flange hole provided at the first shaft connection portion and a through hole of the insulating gasket (3); The screw (5) is inserted into the flange hole of the second shaft connection part and the insulating sleeve (4) in sequence, and then the first shaft connection part, the insulating pad (3) and the second shaft connection part are connected as a whole through the nut (6); or, The first shaft connection part is an internal spline connection part, and the second shaft connection part is an external spline connection part that cooperates with the internal spline connection part to realize transmission; the insulating connection component includes: An insulating pad (3) is sandwiched between the opposite end faces of the internal spline connection part and the external spline connection part, and its shape matches the shape of the internal spline hole of the internal spline connection part; An insulating spline sleeve (15) is sleeved between the inner spline hole and the outer spline shaft of the inner spline connection part and the outer spline connection part; The shielding shell is made of a conductive and magnetic metal material and is sleeved on one end of the transmission section (2) away from the first shaft connection portion. The shielding shell is provided with an electromagnetic leakage prevention device that cooperates with the outer peripheral wall of the transmission section (2) to prevent electromagnetic signals from leaking through the gap between the shielding shell and the shaft hole of the transmission section (2); the end of the shielding shell away from the power input connection section (1) is connected to the electromagnetic shielding cover of the load / intermediate transmission equipment; The mounting frame (13) is connected to the shielding shell to provide support for the shielding shell.

2. The electromagnetic shielding transmission shaft device according to claim 1, characterized in that: The shielding shell comprises: Shielding shell cover (8); The shielding shell seat (7) is located below the shielding shell cover (8) and is connected to the shielding shell cover (8) as a whole through a first bolt (10); the shielding shell seat (7) is fixedly connected to a mounting frame (13) through a second bolt (12) at its bottom.

3. The electromagnetic shielding transmission shaft device according to claim 2, characterized in that: Conductive mesh ribs (11) or electromagnetic shielding coatings are provided between the connection surfaces of the shielding shell cover (8) and the shielding shell seat (7).

4. The electromagnetic shielding transmission shaft device according to claim 1, characterized in that: The electromagnetic leakage prevention device comprises a brush (9), and bosses are provided at both ends of the interior of the shielding shell and extend toward the outer peripheral surface of the transmission section (2). The brush (9) is provided on the bosses and contacts the outer peripheral surface of the transmission section (2).

5. The electromagnetic shielding transmission shaft device according to claim 1, characterized in that: A clamping groove is arranged in the inner spline hole of the inner spline connecting part, and an insulating limiting clamping ring is arranged in the clamping groove to limit the axial relative position of the outer spline shaft and the inner spline hole.

6. The electromagnetic shielding transmission shaft device according to claim 1, characterized in that: The surface of the solid shielding structure (14) is also coated with an electromagnetic shielding coating.

Images