Low-damping signal transmission slip ring with high isolation characteristic

Abstract

The invention relates to the field of signal transmission, in particular to a low-damping signal transmission slip ring with a high isolation characteristic, which comprises a stator assembly, a rotor assembly, a bearing, an end cover and a dustproof plug, the stator assembly is nested on the outer side of the rotor assembly and is axially fixed on the rotor assembly through the bearing and the end cover, and the dustproof plug is arranged on the end cover and is used for sealing and dust prevention; signals are transmitted in an optical coupling mode, torque damping and metal particles, generated by friction between an electric brush and a guide ring, of the slip ring are eliminated, electrical isolation protection is provided for different parts connected with the slip ring, the torque damping of the slip ring is reduced, the service life of the slip ring is prolonged, and the stability of the signal transmission process is guaranteed; the device is simple and reliable in structure, lower in cost, insensitive to impact and vibration environments and high in environment adaptability.

Description

Technical Field

[0001] The present invention relates to the field of signal transmission, and in particular to a low-damping signal transmission slip ring with high isolation characteristics. Background Art

[0002] Between components that rotate relative to each other, signals are mainly transmitted using conductive slip rings. Existing signal transmission slip ring technologies mainly include:

[0003] Conductive slip rings, using a traditional "guide ring-brush" structure, lack isolation properties, have poor EMI resistance, and are weak in safety protection and fault isolation. Some equipment also requires additional isolation devices such as optocouplers, which increases the size and weight of the circuit. The guide rings and brushes at the electrical connection points of the slip rings are key to transmitting electrical signals, and in practical applications, they require minimal friction coefficient and low material wear. Due to machining errors, the rings experience radial runout during rotation, resulting in uneven friction damping and changes in contact resistance caused by temperature rise. Long-term operation can cause the brush holder to deform and the brush surface to wear, resulting in a reduction in contact area and shortening the life of the slip rings. Friction can also cause the metal coating on the surface of the conductive slip rings to flake off, forming micron-sized metal particles that float between the rings. The accumulation of these metal particles further increases the risk of short circuits between the rings.

[0004] Fiber optic slip rings utilize a contactless transmission method, are mechanically wear-free, have a lifespan of hundreds of millions of revolutions, and can reach speeds exceeding 10,000 revolutions per minute. However, their manufacturing process is complex and costly, and their precision components are sensitive to the external environment, making them virtually unusable in environments subject to shock or strong vibration. Furthermore, because they require fiber optic connectors and additional signal conversion circuitry, fiber optic slip rings are difficult to miniaturize. Summary of the Invention

[0005] In view of this, the present invention discloses a low-damping signal transmission slip ring with high isolation characteristics to solve the above-mentioned problems; the slip ring comprises: a stator assembly, a rotor assembly, a bearing, an end cover and a dust plug; the stator assembly is nested outside the rotor assembly and axially fixed to the rotor assembly by the bearing and the end cover; the dust plug is arranged on the end cover for sealing and dustproofing;

[0006] Furthermore, the rotor assembly includes: a rotor, an inner ring chip base, an LED chip welding piece, an LED chip, and a circuit board; one or more grooves are provided in the axial direction of the rotor, the inner ring chip base is provided in the center of the bottom of the groove, the LED chip is provided on the inner ring chip base, and the LED chip welding piece is provided symmetrically with respect to the LED chip on the groove; the circuit board is provided on the rotor;

[0007] Furthermore, the stator assembly includes: a stator, an outer ring chip base, an outer ring chip pad, and a PD chip; the outer ring chip pad and the PD chip are arranged on the outer ring chip base; the outer ring chip base is fixed to the stator;

[0008] Furthermore, the bearing includes: a first deep groove ball bearing and a second deep groove ball bearing, which are respectively arranged at both ends of the rotor axial direction;

[0009] Furthermore, the end cover includes a first bearing inner end cover, a second bearing inner end cover, and a bearing outer end cover.

[0010] The beneficial effects of the present invention include:

[0011] By adopting optical coupling to transmit signals, the torque damping and metal particles caused by the friction between the brush and the guide ring of the slip ring are eliminated, providing electrical isolation protection between different components connected to the slip ring, reducing the torque damping of the slip ring, increasing the service life of the slip ring, and ensuring the stability of the signal transmission process;

[0012] Compared with the optical fiber slip ring, the signal transmission slip ring designed by the present invention has a simple and reliable structure, lower cost, is insensitive to shock and vibration environment, and has strong environmental adaptability;

[0013] The signal transmission slip ring designed by the present invention transmits signals without physical connection, and has stronger anti-interference ability during transmission;

[0014] By adopting an electrical connection interface that is compatible with the signal transmission and receiving units, the implementation method is made more flexible;

[0015] It provides a new design idea for signal transmission slip rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an axial cross-sectional view of a low-damping signal transmission slip ring with high isolation characteristics in Example 1 of the present invention;

[0017] Figure 2 This is a schematic diagram of the main structure of the rotor assembly of the low-damping signal transmission slip ring with high isolation characteristics in Example 1 of the present invention;

[0018] Figure 3 Schematic diagram of the position of the LED chip of the low-damping signal transmission slip ring with high isolation characteristics in Example 1 of the present invention;

[0019] Figure 4 Schematic diagram of the position of the PD chip of the low-damping signal transmission slip ring with high isolation characteristics in Example 1 of the present invention;

[0020] Numbers in the figure: 1-rotor, 2-stator, 3-bearing outer end cover, 4-LED chip, 5-circuit board, 6-first bearing inner end cover, 7-dust plug, 8-inner ring chip base, 9-LED chip welding piece, 10-outer ring chip base, 11-PD chip, 12-first deep groove ball bearing, 13-outer ring chip welding pad, 14-second deep groove ball bearing, 15-second bearing inner end cover. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions, features and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1:

[0023] This embodiment includes a low-damping signal transmission slip ring with high isolation characteristics, the cross-sectional view of which is shown in FIG. Figure 1 As shown, it includes: a stator assembly, a rotor assembly, a bearing, an end cover and a dust plug 7; the stator assembly is nested on the outside of the rotor assembly and is axially fixed to the rotor assembly through the bearing and the end cover, and the dust plug 7 is set on the end cover for sealing and dust prevention.

[0024] Furthermore, the rotor assembly includes: a rotor 1, an inner ring chip base 8, an LED chip welding piece 9, an LED chip 4 and a circuit board 5; the rotor 1 is provided with one or more grooves in the axial direction, the inner ring chip base 8 is provided in the center of the bottom of the groove, the LED chip 4 is provided on the inner ring chip base 8, and the LED chip welding piece 9 is provided symmetrically with respect to the LED chip 4 on the groove; the circuit board 5 is provided on the rotor 1; the main structure of the rotor assembly is as follows Figure 2 As shown; the positional relationship between the LED chip 4, the inner ring chip base 8 and the LED chip solder piece 9 is as shown Figure 3 As shown, the number of slots on the rotor 1 is the same as the number of channels in the signal transmission process.

[0025] Furthermore, the stator assembly includes: a stator 2, an outer ring chip base 10, an outer ring chip pad 13, and a PD chip 11; the outer ring chip pad 13 and the PD chip 11 are arranged on the outer ring chip base 10; the outer ring chip base 10 is fixed on the stator 2; the positional relationship between the outer ring chip base 10, the PD chip 11 and the outer ring chip pad 13 is as follows: Figure 4 shown.

[0026] Furthermore, the bearings include: a first deep groove ball bearing 12 and a second deep groove ball bearing 14 , which are respectively arranged at two axial ends of the rotor 1 .

[0027] Furthermore, the end cover includes a first bearing inner end cover 6 , a second bearing inner end cover 15 , and a bearing outer end cover 3 .

[0028] Both ends of the rotor 1 are fixed to the inner rings of the first deep groove ball bearing 12 and the second deep groove ball bearing 14 respectively.

[0029] The inner ring of the first deep groove ball bearing 12 is relatively fixed to the rotor 1 via the first bearing inner end cover 6 , and the outer ring of the first deep groove ball bearing 12 is coaxially fixed to the stator 2 via the bearing outer end cover 3 .

[0030] The inner ring of the second deep groove ball bearing 14 is coaxially fixed to the rotor 1 through the second bearing inner end cover 15 , and the outer ring of the second deep groove ball bearing 14 is fixed to the stator 2 .

[0031] The first bearing inner end cover 6 and the second bearing inner end cover 15 are connected to the rotor 1 through threads, and the bearing outer end cover 3 is connected to the stator 2 through threads.

[0032] The circuit board 5 is used to control the LED chip 4 and the PD chip 11 to work normally.

[0033] The rotor 1 is also provided with wiring holes for realizing circuit connection between the LED chip 4 and the PD chip 11 .

[0034] Furthermore, the LED chips 4 and PD chips 11, respectively disposed on the rotor 1 and stator 2, are co-located in the axial direction. Because PD chips 11 are significantly more expensive than LED chips 4, for cost considerations, in this embodiment, multiple LED chips 4 are disposed in a single slot of the rotor 1, corresponding to two PD chips 11 disposed on the stator 2. This embodiment of the present invention employs a redundant design, with two PD chips disposed in each slot. This ensures that even if one PD chip fails, the other can still function, thereby ensuring device stability.

[0035] Furthermore, the LED chip 4 and the PD chip 11 have compatible electrical connection interfaces, so that the two can be installed interchangeably. When the low-damping signal transmission slip ring with high isolation characteristics is working, the PD chip 11 detects the light signal emitted by the LED chip 4 to realize signal transmission.

[0036] Example 2:

[0037] A low-damping signal transmission slip ring with high isolation characteristics is different from Example 1 in that, in this embodiment, the positions of the LED chip 4 and the PD chip 11 are interchanged to achieve a reverse signal transmission function.

[0038] Example 3:

[0039] A low-damping signal transmission slip ring with high isolation characteristics is different from Example 1 in that, in this embodiment, LED chips 4 and PD chips 11 are alternately arranged on the same slot of the rotor 1, and the PD chip 11 and LED chip 4 are correspondingly arranged on the stator 2, so as to realize the bidirectional transmission function of the signal without changing the connection relationship of the devices.

[0040] Finally, it should be noted that the above only describes some embodiments of the present invention. For those skilled in the art, it is conceivable that various changes, modifications, substitutions and deformations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents, and the above-mentioned actions should be covered within the scope of protection of the present invention.

Claims

1. A low-damping signal transmission slip ring with high isolation characteristics, characterized in that: include: stator assembly, rotor assembly, bearing, end cover and dust plug (7); the stator assembly is nested outside the rotor assembly and is axially fixed to the rotor assembly through the bearing and the end cover, and the dust plug (7) is arranged on the end cover for sealing and dustproofing; The rotor assembly comprises: a rotor (1), an inner ring chip base (8), an LED chip welding piece (9), an LED chip (4) and a circuit board (5); the rotor (1) is provided with one or more grooves in the axial direction, the inner ring chip base (8) is provided in the center of the bottom of the groove, the LED chip (4) is provided on the inner ring chip base (8), and the LED chip welding piece (9) is provided on the groove symmetrically with respect to the LED chip (4); the circuit board (5) is provided on the rotor (1); The stator assembly comprises: a stator (2), an outer ring chip base (10), an outer ring chip pad (13), and a PD chip (11); the outer ring chip pad (13) and the PD chip (11) are arranged on the outer ring chip base (10); and the outer ring chip base (10) is fixed on the stator (2); The bearing comprises: a first deep groove ball bearing (12) and a second deep groove ball bearing (14), which are respectively arranged at two axial ends of the rotor (1); The end cover comprises a first bearing inner end cover (6), a second bearing inner end cover (15), and a bearing outer end cover (3).

2. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: Both ends of the rotor (1) are respectively fixed to the inner rings of the first deep groove ball bearing (12) and the second deep groove ball bearing (14).

3. The low-damping signal transmission slip ring with high isolation characteristics according to claim 2, characterized in that: The inner ring of the first deep groove ball bearing (12) and the rotor (1) are relatively fixed via the first bearing inner end cover (6), and the outer ring of the first deep groove ball bearing (12) is coaxially fixed to the stator (2) via the bearing outer end cover (3).

4. The low-damping signal transmission slip ring with high isolation characteristics according to claim 2, characterized in that: The inner ring of the second deep groove ball bearing (14) is coaxially fixed to the rotor (1) through the second bearing inner end cover (15), and the outer ring of the second deep groove ball bearing (14) is fixed to the stator (2).

5. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: The first bearing inner end cover (6) and the second bearing inner end cover (15) are connected to the rotor (1) through threads, and the bearing outer end cover (3) is connected to the stator (2) through threads.

6. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: The LED chip (4) and the PD chip (11) respectively arranged on the rotor (1) and the stator (2) are in the same axial position and have compatible electrical connection interfaces, so that the two can be installed interchangeably.

7. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: The circuit board (5) is used to enable the LED chip (4) and the PD chip (11) to work normally.

8. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: The rotor (1) is provided with wiring holes, which are used to realize circuit connections between the LED chip (4) and the PD chip (11).

9. The low-damping signal transmission slip ring with high isolation characteristics according to claim 1, characterized in that: The number of slots on the rotor (1) is the same as the number of channels in the signal transmission process.

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