Slip ring power supply device for spraying robot and spraying robot

Abstract

The invention discloses a slip ring power supply device for a spraying robot and a spraying robot, comprising a fixed end and a movable end; the fixed end comprises a first slip ring body, the first slip ring body is provided with a first ring seat, the outer wall of the first ring seat is provided with a collector ring and a hairspring, the collector ring and the hairspring are alternately arranged in sequence, and the inner end of the hairspring is electrically connected to the collector ring; the movable end comprises a second slip ring body, the second slip ring body is provided with a second ring seat, the inner diameter of the second ring seat is greater than the outer diameter of the first ring seat, and the inner wall of the second ring seat is provided with a bimetallic contact arm; the bimetallic contact arm comprises a low-expansion metal sheet, the low-expansion metal sheet is provided with a contact portion, the low-expansion metal sheet is provided with a high-expansion metal sheet and a heating wire located between the low-expansion metal sheet and the high-expansion metal sheet, and both ends of the heating wire are electrically connected to the low-expansion metal sheet and the hairspring; the wear of the bimetallic contact arm and the collector ring can be reduced, which is beneficial to prolonging the service life of the slip ring power supply device and reducing the frequency of maintenance and replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of connection devices, and in particular to a slip ring power supply device for a spraying robot and the spraying robot. Background Art

[0002] With the development of industrial automation, robots play an increasingly important role in various manufacturing and production processes. Especially in spraying operations, spraying robots are widely used due to their high efficiency and precision. However, the power supply system of the spraying robot, especially the slip ring power supply device, has some problems that need to be solved.

[0003] Existing robot power supply slip ring devices usually use a conductive brush to contact a conductive ring to achieve circuit conduction. This structure relies on the elasticity of the conductive brush itself to keep it in contact with the conductive ring, thereby maintaining the continuity of the current. However, this design brings some significant disadvantages. First, the long-term contact between the conductive brush and the conductive ring leads to continuous wear, which not only shortens the service life of the conductive brush and the conductive ring, but also increases the frequency of maintenance and replacement. Secondly, during the operation of the spray robot, not every set of conductive brush / conductive ring assemblies needs to conduct current all the time. Therefore, for conductive brush / conductive ring assemblies that do not need to conduct current, it is redundant to keep the conductive brush in contact with the conductive ring, further exacerbating unnecessary wear.

[0004] This unnecessary contact wear not only affects the life of the slip ring power supply device, but may also cause unstable power supply problems during long-term operation of the spray robot, thus affecting the spray quality and efficiency. In addition, frequent maintenance and replacement work also increases the operating costs of the enterprise. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a slip ring power supply device for a spraying robot and a spraying robot, which can reduce the wear of the bimetallic contact arm and the collector ring, thereby extending the service life of the slip ring power supply device and reducing the frequency of maintenance and replacement, so as to ensure the power supply stability of the spraying robot.

[0006] To achieve the above object, the specific scheme of the present invention is as follows:

[0007] A first aspect of the present invention provides a slip ring power supply device for a spraying robot, comprising a fixed end and a movable end;

[0008] The fixed end comprises a first slip ring body, the first slip ring body is concavely provided with a receiving groove, a first ring seat is arranged in the receiving groove, a plurality of collector rings and a plurality of hairsprings are arranged at intervals on the outer wall of the first ring seat along its height direction, the collector rings and the hairsprings are arranged alternately in sequence, and the inner end of the hairspring is electrically connected to the corresponding collector ring;

[0009] The movable end comprises a second slip ring body, the second slip ring body is provided with a second ring seat, the inner diameter of the second ring seat is larger than the outer diameter of the first ring seat, the inner wall of the second ring seat is provided with a plurality of bimetallic contact arms arranged along the height direction of the second ring seat; the bimetallic contact arms comprise a low-expansion metal sheet, a contact portion for electrically contacting and conducting with a corresponding collector ring is provided on a side of the low-expansion metal sheet facing away from the inner wall of the second ring seat, a high-expansion metal sheet and a heating wire are provided on a side of the low-expansion metal sheet facing the inner wall of the second ring seat, the heating wire is arranged between the low-expansion metal sheet and the high-expansion metal sheet, one end of the heating wire is electrically connected to the low-expansion metal sheet, and the other end of the heating wire is electrically connected to the outer end of the corresponding hairspring;

[0010] The collector ring is provided with a first connecting arm for realizing electrical conduction between the collector ring and the outside world, and a second connecting arm is extended from the middle of the low expansion metal sheet for realizing electrical conduction between the bimetallic contact arm and the outside world.

[0011] Optionally, a plurality of first ring grooves are provided at intervals on the outer wall of the first ring seat, the collector ring is installed in the corresponding first ring grooves, and the end of the first connecting arm passes through the first ring seat and extends out of the first slip ring body along the inner wall of the first ring seat.

[0012] Optionally, the inner wall of the first ring seat is provided with a receiving groove extending along the height direction thereof corresponding to each first connecting arm, the receiving groove is communicated with the first ring groove, and the first connecting arm is received in the receiving groove.

[0013] Optionally, a plurality of second annular grooves are provided at intervals on the outer wall of the first ring seat, the hairspring is wound in the second annular grooves, and the inner end of the hairspring passes through the first ring seat inwardly and is electrically connected to the corresponding first connecting arm.

[0014] Optionally, high expansion metal sheets are provided on both ends of the low expansion metal sheet facing the inner wall of the second ring seat, and contact portions are provided on both ends of the low expansion metal sheet facing away from the inner wall of the second ring seat.

[0015] Optionally, a jet cleaning assembly is provided in correspondence with each contact portion of the second ring seat, a driving portion is provided in the groove wall of the accommodating groove, one end of the jet cleaning assembly is in contact with the driving portion, and the other end of the jet cleaning assembly is provided with a nozzle for spraying jets toward the corresponding contact portion; when the second slip ring body drives the jet cleaning assembly to rotate relative to the first slip ring body, the driving portion causes the nozzle of the jet cleaning assembly to periodically spray jets toward the corresponding contact portion.

[0016] Optionally, the jet cleaning assembly includes a jet seat fixedly passing through the second ring seat, one end of the jet seat is recessed with a cavity along its length direction, a plunger is slidably connected in the cavity, an air cavity is formed between the inner end of the plunger and the jet seat, the outer end of the plunger abuts against the driving part, a reset member is provided in the air cavity, the plunger is provided with an air inlet channel connected to the air cavity, an air inlet valve sheet is provided in the air inlet channel, an exhaust channel is provided at the other end of the jet seat, the nozzle is fixedly installed on the jet seat at a position corresponding to the exhaust channel, and the jet seat is provided with an exhaust valve sheet between the exhaust channel and the nozzle;

[0017] The first slip ring body is provided with an air inlet hole and an air outlet hole. The distance between the air inlet hole and the center is greater than the outer diameter of the second ring seat, and the distance between the air outlet hole and the center is less than the inner diameter of the second ring seat.

[0018] Optionally, the outer end shaft of the plunger is connected to a roller for contacting the driving part.

[0019] Optionally, the driving portion includes a plurality of driving bosses evenly distributed along the circumferential direction, and the driving bosses include an extrusion retaining portion and a driving inclined surface connected at both ends of the extrusion retaining portion; when the plunger moves from the driving inclined surface toward the extrusion retaining portion, the exhaust valve sheet can open to allow the gas in the air cavity to be ejected through the exhaust channel and the nozzle.

[0020] The second aspect of the present invention provides a spraying robot, including a robot body and a slip ring power supply device as described above; the fixed end of the slip ring power supply device is fixedly connected to the base of the robot body, and the movable end of the slip ring power supply device is fixedly connected to the execution end of the robot body.

[0021] The beneficial effects of the present invention are as follows: the present invention replaces the existing conductive brush structure with a bimetallic contact arm, and arranges a heating wire between a low-expansion metal sheet and a high-expansion metal sheet, and utilizes a hairspring to realize electrical connection between the heating wire and a collector ring, so that when no current passes through the circuit corresponding to the bimetallic contact arm, the heating wire does not heat up, and the contact portion of the bimetallic contact arm is out of contact with the collector ring; when current passes through the circuit corresponding to the bimetallic contact arm, the heating wire is utilized to heat up and bend the bimetallic contact arm, so that the contact portion is electrically contacted and conducted with the collector ring, so as to realize transmission of a large current; in this way, the wear of the bimetallic contact arm and the collector ring can be reduced, which is beneficial to prolonging the service life of the slip ring power supply device and reducing the frequency of maintenance and replacement, so as to ensure the power supply stability of the spray robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional schematic diagram of the slip ring power supply device of the present invention;

[0023] Figure 2 It is a partial structural schematic diagram of the slip ring power supply device of the present invention;

[0024] Figure 3is a cross-sectional schematic diagram of a fixed end of a slip ring power supply device of the present invention;

[0025] Figure 4 is a schematic structural diagram of the first slip ring body of the present invention;

[0026] Figure 5 is a cross-sectional schematic diagram of the first ring seat of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the collector ring of the present invention;

[0028] Figure 7 It is a structural schematic diagram of the active end of the present invention;

[0029] Figure 8 It is a schematic structural diagram of the bimetallic contact arm of the present invention;

[0030] Fig. 9 is a cross-sectional schematic diagram of the jet cleaning assembly of the present invention;

[0031] Fig.10 It is a cross-sectional schematic diagram of the slip ring power supply device of the present invention installed on the robot body;

[0032] Description of reference numerals: 11, first slip ring body; 111, receiving groove; 112, driving boss; 1121, extrusion holding portion; 1122, driving inclined surface; 113, air inlet; 114, exhaust hole; 12, first ring seat; 121, first ring groove; 122, receiving groove; 123, second ring groove; 13, collector ring; 131, first connecting arm; 14, balance spring; 21, second slip ring body; 22, second ring seat; 23 , bimetallic contact arm; 231, low expansion metal sheet; 2311, contact portion; 2312, second connecting arm; 232, high expansion metal sheet; 233, heating wire; 241, jet seat; 2411, exhaust channel; 242, plunger; 2421, air intake channel; 243, air cavity; 244, reset part; 245, air intake valve sheet; 246, nozzle; 247, exhaust valve sheet; 248, roller; 3, robot body. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0034] like Figures 1 to 10 As shown, a slip ring power supply device for a spraying robot described in this embodiment includes a fixed end and a movable end rotatably connected to the fixed end;

[0035] The fixed end includes a first slip ring body 11, the first slip ring body 11 is concavely provided with a receiving groove 111, the center of the receiving groove 111 is provided with a first center hole, and the first center hole is provided to facilitate the installation of the first slip ring body 11, a first ring seat 12 is provided in the receiving groove 111, and a plurality of collector rings 13 and a plurality of hairsprings 14 are arranged at intervals along the height direction of the outer wall of the first ring seat 12, the collector rings 13 and the hairsprings 14 are arranged alternately in sequence, and the inner end of the hairspring 14 is electrically connected to the corresponding collector ring 13;

[0036] The movable end includes a second slip ring body 21, which is rotatably connected to the first slip ring body 11. A second center hole is arranged at the center of the second slip ring body 21. The second center hole is arranged to facilitate the installation of the second slip ring body 21. The second slip ring body 21 is provided with a second ring seat 22 coaxially arranged with the second center hole. The second ring seat 22 movably extends into the accommodating groove 111. The inner diameter of the second ring seat 22 is larger than the outer diameter of the first ring seat 12. The inner wall of the second ring seat 22 is provided with a plurality of bimetallic contact arms 23 arranged along the height direction of the second ring seat 22. The bimetallic The contact arm 23 includes a low-expansion metal sheet 231. A contact portion 2311 for electrically contacting and conducting with the corresponding collector ring 13 is provided on the side of the low-expansion metal sheet 231 facing away from the inner wall of the second ring seat 22. A high-expansion metal sheet 232 and a heating wire 233 are provided on the side of the low-expansion metal sheet 231 facing the inner wall of the second ring seat 22. The heating wire 233 is arranged between the low-expansion metal sheet 231 and the high-expansion metal sheet 232. One end of the heating wire 233 is electrically connected to the low-expansion metal sheet 231, and the other end of the heating wire 233 is electrically connected to the outer end of the corresponding hairspring 14.

[0037] Specifically, the thermal expansion coefficient of the low expansion metal sheet 231 is lower than the thermal expansion coefficient of the high expansion metal sheet 232; when no current flows through the circuit corresponding to the bimetallic contact arm 23 of the slip ring power supply device for the spraying robot described in this embodiment, the heating wire 233 does not generate heat, and the bimetallic contact arm 23 is in an extended state, at which time the contact portion 2311 does not contact the corresponding collector ring 13;

[0038] When current flows through the circuit corresponding to the bimetallic contact arm 23, the low-expansion metal sheet 231, the heating wire 233, the hairspring 14 and the collector ring 13 are in an electrically conductive state. At this time, the current flows through the heating wire 233, and the heating wire 233 generates heat, causing the bimetallic contact arm 23 to bend toward the collector ring 13, so that the contact portion 2311 is electrically contacted and connected with the corresponding collector ring 13, thereby realizing the conduction of the circuit and realizing the transmission of large current; during the rotation of the movable end relative to the fixed end, the electrical connection between the heating wire 233 and the collector ring 13 is maintained by contraction and expansion of the hairspring 14.

[0039] In this embodiment, a bimetallic contact arm 23 is provided to replace the existing conductive brush structure, and a heating wire 233 is provided between a low-expansion metal sheet 231 and a high-expansion metal sheet 232. The hairspring 14 is used to realize the electrical connection between the heating wire 233 and the collector ring 13, so that when no current flows through the circuit corresponding to the bimetallic contact arm 23, the heating wire 233 does not generate heat, and the contact portion 2311 of the bimetallic contact arm 23 is disconnected from the collector ring 13. When current flows through the circuit corresponding to the bimetallic contact arm 23, the heating wire 233 generates heat to bend the bimetallic contact arm 23, so that the contact portion 2311 is electrically connected to the collector ring 13 to realize the transmission of a large current. In this way, the wear of the bimetallic contact arm 23 and the collector ring 13 can be reduced, which is beneficial to prolonging the service life of the slip ring power supply device and reducing the frequency of maintenance and replacement, so as to ensure the power supply stability of the spray robot.

[0040] Exemplarily, the heating wire 233 is preferably made of nickel-chromium alloy or iron-chromium-aluminum alloy, the low expansion metal sheet 231 is preferably made of nickel-iron alloy (nickel content is 34~50%), and the high expansion metal sheet 232 is preferably made of manganese-nickel-copper alloy, nickel-chromium-iron alloy, nickel-manganese-iron alloy and nickel.

[0041] like Figures 1 to 3 , Figure 5 and Figure 6 As shown, in the slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, a plurality of first ring grooves 121 are provided at intervals on the outer wall of the first ring seat 12, and the collector ring 13 is installed in the corresponding first ring grooves 121. The collector ring 13 is provided with a first connecting arm 131, and the end of the first connecting arm 131 penetrates the first ring seat 12 and extends out of the first slip ring body 11 along the inner wall of the first ring seat 12. In this embodiment, the first ring groove 121 is provided so that the collector ring 13 is firmly installed on the first ring seat 12 to ensure the electrical performance of the collector ring 13, and the first connecting arm 131 is provided so that the collector ring 13 is electrically conductive with the outside.

[0042] like Figure 1 , Figure 3 and Figure 5 As shown, in the slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, the inner wall of the first ring seat 12 is provided with a receiving groove 122 extending along the height direction thereof corresponding to each first connecting arm 131, the receiving groove 122 is communicated with the first ring groove 121, and the first connecting arm 131 is received in the receiving groove 122. In this embodiment, by providing the receiving groove 122, the first connecting arm 131 is reliably fixed on the first slide seat, thereby further ensuring the electrical performance of the collector ring 13.

[0043] like Figure 3 and Figure 5As shown, in the slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, a plurality of second annular grooves 123 are provided at intervals on the outer wall of the first ring seat 12, and the hairspring 14 is wound in the second annular grooves 123. The inner end of the hairspring 14 passes through the first ring seat 12 inwardly and is electrically connected to the corresponding first connecting arm 131. In this embodiment, the second annular grooves 123 are provided to accommodate the hairspring 14.

[0044] like Figure 2 and Figure 8 As shown, in the slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, a high expansion metal sheet 232 is provided on both ends of the low expansion metal sheet 231 on the side facing the inner wall of the second ring seat 22, and a contact portion 2311 is provided on both ends of the low expansion metal sheet 231 on the side facing away from the inner wall of the second ring seat 22. In this embodiment, the high expansion metal sheet 232 and the contact portion 2311 are provided at both ends of the low expansion metal sheet 231, thereby further meeting the transmission requirements of large currents.

[0045] It should be noted that if Figure 2 and Figure 8 As shown, a second connecting arm 2312 extends from the middle of the low expansion metal sheet 231 , and a distal end of the second connecting arm 2312 extends out of the second slip ring body 21 along the inner wall of the first ring seat 12 so as to be electrically connected to the outside.

[0046] like Figure 1 , Figure 2 and Figure 7 As shown, a slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, a jet cleaning assembly is penetrated through the second ring seat 22 corresponding to each contact portion 2311, a driving portion is provided on the groove wall of the accommodating groove 111, one end of the jet cleaning assembly is in contact with the driving portion, and the other end of the jet cleaning assembly is provided with a nozzle 246 that sprays toward the corresponding contact portion 2311; when the second slip ring body 21 drives the jet cleaning assembly to rotate relative to the first slip ring body 11, the driving portion causes the nozzle 246 of the jet cleaning assembly to periodically spray toward the corresponding contact portion 2311.

[0047] In this embodiment, a jet cleaning assembly and a driving unit are arranged to cooperate, so that during the rotation of the movable end, the driving unit is utilized to cause the nozzle 246 of the jet cleaning assembly to periodically spray jets toward the corresponding contact portion 2311, thereby cooling the contact surface of the contact portion 2311 and blowing away debris generated by friction on the contact surface of the contact portion 2311, thereby effectively reducing the increase in contact resistance caused by the adhesion of debris to the surface of the contact portion 2311.

[0048] In some embodiments, the slip ring power supply device for a spraying robot described in this embodiment is as follows: Figure 1 , Figure 7 and Fig. 9 As shown, the jet cleaning assembly includes a jet seat 241 fixedly passing through the second ring seat 22, one end of the jet seat 241 is concavely provided with a cavity along its length direction, a plunger 242 is slidably connected in the cavity, an air cavity 243 is formed between the inner end of the plunger 242 and the jet seat 241, the outer end of the plunger 242 abuts against the driving part, a reset member 244 is provided in the air cavity 243, the plunger 242 is provided with an air inlet channel 2421 communicating with the air cavity 243, an air inlet valve sheet 245 is provided in the air inlet channel 2421, an exhaust channel 2411 is provided at the other end of the jet seat 241, a nozzle 246 is fixedly installed on the jet seat 241 corresponding to the position of the exhaust channel 2411, and an exhaust valve sheet 247 is provided between the exhaust channel 2411 and the nozzle 246 on the jet seat 241;

[0049] like Figure 3 and Figure 4 As shown, the first slip ring body 11 is provided with an air inlet 113 and an air outlet 114. The distance between the air inlet 113 and the center is greater than the outer diameter of the second ring seat 22, and the distance between the air outlet 114 and the center is less than the inner diameter of the second ring seat 22. Preferably, the reset member 244 is a spring.

[0050] Specifically, when the driving part generates a thrust on the plunger 242 and causes the plunger 242 to slide inward, the plunger 242 causes the reset member 244 to deform, the effective volume of the air cavity 243 is reduced, and the pressure is increased, so that the exhaust valve plate 247 is opened, and the high-pressure gas in the air cavity 243 is ejected through the exhaust channel 2411 and the nozzle 246, that is, the air cavity 243 performs an exhaust action to cool and clean the contact portion 2311, and the gas blown into the second ring seat 22 is discharged through the exhaust hole 114, thereby taking away the heat in the space between the first ring seat 12 and the second ring seat 22, so that the bimetallic contact arm 23 and the collector ring 13 can be cooled; when the driving part releases the squeeze on the plunger 242, the reset member 244 is deformed ... 244 pushes the plunger 242 to slide outward, the effective volume of the air cavity 243 increases, and the pressure decreases, so that the air inlet valve plate 245 opens, and the outside air enters the receiving groove 111 through the air inlet hole 113 and enters the air cavity 243 through the air inlet channel 2421, replenishing the gas in the air cavity 243, that is, completing the air intake action to facilitate the next air injection action; in this way, as the movable end rotates, the air cavity 243 periodically inhales and exhausts air, and a heat dissipation airflow can be formed in the movable end and the fixed end, thereby taking away the heat generated inside the slip ring power supply device, dissipating the heat and cooling the collector ring 13 and the bimetallic contact arm 23, and further ensuring the electrical performance of the collector ring 13 and the bimetallic contact arm 23.

[0051] like Figure 1 , Figure 2 , Figure 7 and Fig. 9As shown, in the slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, the outer end of the plunger 242 is connected to a roller 248 for contacting the driving part. In this embodiment, the roller 248 is arranged to contact the driving part to reduce friction, so that the piston end rotates more smoothly relative to the fixed end.

[0052] like Figure 3 and Figure 4 As shown, a slip ring power supply device for a spraying robot described in this embodiment, in some embodiments, the driving part includes a plurality of driving bosses 112 uniformly distributed along the circumferential direction, and the driving boss 112 includes an extrusion retaining part 1121 and a driving inclined surface 1122 connected to both ends of the extrusion retaining part 1121; specifically, when the plunger 242 moves from the driving inclined surface 1122 toward the extrusion retaining part 1121, the exhaust valve plate 247 can be opened, so that the gas in the air cavity 243 is ejected through the exhaust channel 2411 and the nozzle 246, so as to cool and clean the contact part 2311; when the plunger 242 moves from the extrusion retaining part 1121 toward the driving inclined surface 1122, the driving boss 112 releases the extrusion of the plunger 242, so that the plunger 242 slides outward under the action of the reset member 244, thereby causing the air cavity 243 to perform an air suction action; in this way, the air cavity 243 can periodically inhale and exhaust air during the rotation of the movable end.

[0053] like Figures 1 to 10 As shown, an embodiment of the present invention also provides a spraying robot, including a robot body 3 and a slip ring power supply device as described above; the fixed end of the slip ring power supply device is fixedly connected to the base of the robot body 3, and the movable end of the slip ring power supply device is fixedly connected to the execution end of the robot body 3.

[0054] This embodiment adopts the above-mentioned slip ring power supply device, thereby having all the beneficial effects of the above-mentioned slip ring power supply device, which will not be described in detail here.

[0055] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A slip ring power supply device for a spraying robot, characterized in that: Including fixed end and movable end; The fixed end comprises a first slip ring body, the first slip ring body is concavely provided with a receiving groove, a first ring seat is arranged in the receiving groove, a plurality of collector rings and a plurality of hairsprings are arranged at intervals on the outer wall of the first ring seat along its height direction, the collector rings and the hairsprings are arranged alternately in sequence, and the inner end of the hairspring is electrically connected to the corresponding collector ring; The movable end comprises a second slip ring body, the second slip ring body is provided with a second ring seat, the inner diameter of the second ring seat is larger than the outer diameter of the first ring seat, the inner wall of the second ring seat is provided with a plurality of bimetallic contact arms arranged along the height direction of the second ring seat; the bimetallic contact arms comprise a low-expansion metal sheet, a contact portion for electrically contacting and conducting with a corresponding collector ring is provided on a side of the low-expansion metal sheet facing away from the inner wall of the second ring seat, a high-expansion metal sheet and a heating wire are provided on a side of the low-expansion metal sheet facing the inner wall of the second ring seat, the heating wire is arranged between the low-expansion metal sheet and the high-expansion metal sheet, one end of the heating wire is electrically connected to the low-expansion metal sheet, and the other end of the heating wire is electrically connected to the outer end of the corresponding hairspring; The collector ring is provided with a first connecting arm for realizing electrical conduction between the collector ring and the outside world, and a second connecting arm is extended from the middle of the low expansion metal sheet for realizing electrical conduction between the bimetallic contact arm and the outside world.

2. A slip ring power supply device for a spraying robot according to claim 1, characterized in that: The outer wall of the first ring seat is provided with a plurality of first ring grooves at intervals, the collector ring is installed in the corresponding first ring grooves, and the end of the first connecting arm penetrates the first ring seat and extends out of the first slip ring body along the inner wall of the first ring seat.

3. A slip ring power supply device for a spraying robot according to claim 2, characterized in that: The inner wall of the first ring seat is provided with a receiving groove extending along the height direction thereof corresponding to each first connecting arm. The receiving groove is communicated with the first ring groove, and the first connecting arm is received in the receiving groove.

4. A slip ring power supply device for a spraying robot according to claim 2, characterized in that: A plurality of second ring grooves are arranged at intervals on the outer wall of the first ring seat, and the hairspring is wound in the second ring grooves. The inner end of the hairspring passes through the first ring seat inwardly and is electrically connected to the corresponding first connecting arm.

5. The slip ring power supply device for a spraying robot according to claim 1, characterized in that: High expansion metal sheets are provided on the sides of both ends of the low expansion metal sheet facing the inner wall of the second ring seat, and contact portions are provided on the sides of both ends of the low expansion metal sheet facing away from the inner wall of the second ring seat.

6. A slip ring power supply device for a spraying robot according to claim 5, characterized in that: A jet cleaning assembly is provided through each contact portion corresponding to the second ring seat, a driving portion is provided on the groove wall of the accommodating groove, one end of the jet cleaning assembly is in contact with the driving portion, and a nozzle for spraying jets toward the corresponding contact portion is provided at the other end of the jet cleaning assembly; when the second slip ring body drives the jet cleaning assembly to rotate relative to the first slip ring body, the driving portion causes the nozzle of the jet cleaning assembly to periodically spray jets toward the corresponding contact portion.

7. A slip ring power supply device for a spraying robot according to claim 6, characterized in that: The jet cleaning assembly includes a jet seat fixedly passing through the second ring seat, one end of the jet seat is concavely provided with a cavity along its length direction, a plunger is slidably connected in the cavity, an air cavity is formed between the inner end of the plunger and the jet seat, the outer end of the plunger abuts against the driving part, a reset member is provided in the air cavity, the plunger is provided with an air inlet channel connected to the air cavity, an air inlet valve sheet is provided in the air inlet channel, an exhaust channel is provided at the other end of the jet seat, a nozzle is fixedly installed on the jet seat at a position corresponding to the exhaust channel, and an exhaust valve sheet is provided between the exhaust channel and the nozzle on the jet seat; The first slip ring body is provided with an air inlet hole and an air outlet hole. The distance between the air inlet hole and the center is greater than the outer diameter of the second ring seat, and the distance between the air outlet hole and the center is less than the inner diameter of the second ring seat.

8. The slip ring power supply device for a spraying robot according to claim 7, characterized in that: The outer end shaft of the plunger is connected with a roller for contacting the driving part.

9. The slip ring power supply device for a spraying robot according to claim 7, characterized in that: The driving part includes a plurality of driving bosses evenly distributed along the circumferential direction, and the driving bosses include an extrusion retaining part and a driving inclined surface connected to both ends of the extrusion retaining part; when the plunger moves from the driving inclined surface toward the extrusion retaining part, the exhaust valve sheet can be opened to allow the gas in the air cavity to be ejected through the exhaust channel and the nozzle.

10. A spraying robot, characterized in that: It comprises a robot body and a slip ring power supply device as described in any one of claims 1 to 9 above; the fixed end of the slip ring power supply device is fixedly connected to the base of the robot body, and the movable end of the slip ring power supply device is fixedly connected to the execution end of the robot body.

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