CN114976801A - Brush yoke assembly for conductive slip ring and conductive slip ring - Google Patents

Abstract

The invention relates to a brush holder assembly for a conductive slip ring and the conductive slip ring. According to the invention, the angle adjusting device is additionally arranged in the brush frame assembly, so that the angle of the brush wire/brush bundle can be conveniently and quickly adjusted, and the pressure between the brush wire and the conductive ring can be adjusted. The angle adjusting device can realize the quick adjustment of the opening angles of all the brush bundles/brush bundles on the same circuit board, and can also make the opening angles of the brush bundles/brush threads corresponding to at least two conducting rings on the same circuit board different through the matching of the angle adjusting device and part of the brush threads/brush bundles, thereby meeting different use requirements.

Description

Brush yoke assembly for conductive slip ring and conductive slip ring

Technical Field

The invention belongs to the technical field of conductive slip rings, and particularly relates to a brush holder assembly for a conductive slip ring and the conductive slip ring.

Background

The conductive slip ring is an electric connection device for power and signal transmission between two relative rotating mechanisms, has wide application field, is widely applied to the fields of aviation, aerospace, military, wind energy, electronic automation and the like, and has good market prospect.

The brush yoke assembly for the conventional conductive slip ring is of a fixed structure, and after the brush yoke assembly is machined, the opening angle of a brush wire or a brush bundle in the installation process cannot be adjusted, so that different use requirements cannot be met.

Disclosure of Invention

In order to solve the above problems, the present invention provides a brush holder assembly for a conductive slip ring, which has an adjusting device, and the adjusting device can adjust the opening angle of the brush wire or the brush bundle to meet different use requirements.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The brush holder assembly for the conductive slip ring comprises a circuit board, a contact cantilever for being in contact conduction with the conductive ring, and an angle adjusting device for changing the opening angle of the contact cantilever.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the brush holder assembly for the conductive slip ring, the angle adjusting device comprises a guide rail fixed below the circuit, and two horizontal sliding blocks are arranged on the guide rail in a sliding manner along the length direction of the guide rail; the vertical sliding blocks pressed on the two horizontal sliding blocks can move upwards when the two horizontal sliding blocks move relatively and move downwards when the two horizontal sliding blocks move oppositely; the compressing elastic piece between the horizontal sliding block and the guide rail enables the horizontal sliding block to push the vertical sliding block to move upwards, the adjusting screw screwed on the circuit board is used for limiting the vertical sliding block to move upwards, and when the adjusting screw moves downwards, the vertical sliding block can push the two horizontal sliding blocks to move back to back, so that the two horizontal sliding blocks can push the contact cantilever to increase the opening angle of the cantilever.

In the brush holder assembly for the conductive slip ring, the angle adjusting device is provided with one angle adjusting device, and the angle adjusting device can simultaneously adjust the opening angles of all contact cantilevers.

In the brush holder assembly for the conductive slip ring, a plurality of angle adjusting devices are provided, and the opening angles of the contact cantilevers corresponding to different conductive rings can be adjusted to be different through the corresponding angle adjusting devices.

According to the brush holder assembly for the conductive slip ring, the vertical sliding block is in sliding fit with the two horizontal sliding blocks through the inclined plane, so that the vertical movement of the vertical sliding block is converted into the horizontal movement of the horizontal sliding block.

In the brush holder assembly for a conductive slip ring, the contact suspension arm is a brush wire, and a portion of the horizontal slider contacting the brush wire is an arc surface.

In the brush holder assembly for a conductive slip ring, the contact suspension arm is a brush bundle, the horizontal slider is in contact with the metal wires of the brush bundle, and the contact portion is an arc-shaped groove capable of accommodating the metal wires.

According to the brush holder assembly for the conductive slip ring, the horizontal sliding block is integrally L-shaped, the top of the vertical edge of the L-shaped horizontal sliding block is in clearance fit with the lower end face of the circuit board, an inclined plane extending from the top to the bottom is formed on the vertical edge, and the inclined plane is in sliding fit with the vertical sliding block.

The purpose of the invention and the technical problem to be solved are also realized by adopting the following technical scheme. According to the conductive slip ring provided by the invention, the conductive slip ring comprises a rotating shaft, a supporting frame and a brush holder assembly, wherein the rotating shaft is rotatably assembled at the inner ring of the supporting frame through a supporting bearing, and the brush holder assembly is fixed at the outer ring of the supporting frame, and the conductive slip ring is characterized in that: the brush holder assembly is the brush holder assembly.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

In the conductive slip ring, a non-return component for preventing the rotating shaft from reversely rotating is arranged between the rotating shaft and the supporting frame.

Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:

according to the invention, the angle adjusting device is additionally arranged in the brush frame assembly, so that the angle of the brush wire/brush bundle can be conveniently and quickly adjusted, and the pressure between the brush wire and the conductive ring can be adjusted.

The angle adjusting device can realize the quick adjustment of the opening angles of all the brush bundles/brush bundles on the same circuit board, and can also make the opening angles of the brush bundles/brush threads corresponding to at least two conducting rings on the same circuit board different through the matching of the angle adjusting device and part of the brush threads/brush bundles, thereby meeting different use requirements.

When the brush frame assembly is used for angle adjustment, the adjusting screw is screwed downwards, the adjusting screw pushes the vertical sliding block to move downwards, the vertical sliding block pushes the horizontal sliding block to move horizontally outwards, the horizontal sliding block moves in the guide rail positioning groove, the arc surface at the tail end of the horizontal sliding block is in contact with the brush wire, the brush wire is pushed to move outwards in an expanding mode, the opening angle of the brush wire is increased to theta 1 from theta, and the opening angle theta determines the contact pressure between the brush wire and the conducting ring, so that the contact pressure between the brush wire and the conducting ring is changed, and the dynamic adjustment of the contact force is realized.

Drawings

Fig. 1 is a schematic structural view of a conductive slip ring according to embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a pressure adjustment structure of a conductive slip ring brush according to embodiment 2 of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic illustration of the pressure build-up condition of FIG. 3;

fig. 6 is a schematic structural view of a fixture for fixing brush bundles of an electric brush of a conductive slip ring in embodiment 3 of the present invention;

FIG. 7 is a schematic view of a brush bundle structure of an electric brush according to embodiment 3 of the present invention;

fig. 8 is a schematic view of a brush bundle fixing tool according to embodiment 3 of the present invention;

FIG. 9 is a schematic view of a finished brush according to example 3 of the present invention;

FIG. 10 is a schematic view of a brush positioning block according to embodiment 3 of the present invention;

fig. 11 is a schematic view of a fixing block for a brush bundle fixing block according to embodiment 3 of the present invention;

FIG. 12 is a schematic view of a brush holder pressing plate according to example 3 of the present invention;

fig. 13 is a schematic structural diagram of a device for testing the wear life of a conductive slip ring according to embodiment 4 of the present invention; FIG. 14 is a schematic view of a brush holder assembly.

[ description of main element symbols ]

1: rotation axis

2: supporting rack

3: brush holder assembly

4: support bearing

5: insulating ring

6: conducting ring

7: non-return assembly

8: flat key

9: groove

10: roller pin

11: pre-tightening spring

12: internal star wheel

13: circuit board

14: contact suspension

15: adjusting screw

16: horizontal sliding block

17: guide rail

18: vertical slide block

19: compressing elastic piece

20: sleeve pipe

21: metal wire

22: locating block

23: pressing plate

24: fixed seat

25: chute

26: servo motor

27: fixing rack

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the conductive slip ring according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

The conductive slip ring is basically composed of a rotating shaft 1, an end cover, a support frame 2, a brush holder assembly 3, a support bearing 4, an insulating ring 5 and a conductive ring 6. The end cover is fixed at the end part of the support frame 2 and is connected with the fixing part to realize the fixation of the conductive slip ring. The rotating shaft 1 is rotatably arranged in the inner ring of the support frame 2 in a penetrating mode through the support bearing 4 and rotates along with the rotating part, the brush holder assembly 3 is fixed on the outer ring of the support frame 4 and is in sliding contact with the conducting ring 6 on the rotating shaft 1 through the contact cantilever 14 (brush wires or brush bundles) extending out of the brush holder assembly, and stable current transmission is achieved.

Please refer to fig. 1 and fig. 2, which are schematic structural diagrams of parts of a conductive slip ring according to embodiment 1 of the present invention, in which the conductive slip ring includes a rotating shaft 1, a supporting frame 2, a brush holder assembly 3, a supporting bearing 4, an insulating ring 5, and a conductive ring 6, wherein two ends of the rotating shaft 1 are rotatably connected to an inner ring of the supporting frame 2 through the supporting bearing 4, and the brush holder assembly 3 is fixed to an outer ring of the supporting frame 2. The to-electric ring 6 is fixed on the periphery of the rotating shaft 1 through an insulating ring 5, and the to-electric ring 6 and the insulating ring 5 are distributed along the axial direction of the rotating shaft 1.

The brush holder assembly 3 comprises a circuit board 13 and a plurality of contact cantilevers 14 fixed on the circuit board 13, wherein the circuit board 13 is fixed on the support frame 2, and the contact cantilevers 14 are in sliding contact with the conductive ring 6 to realize stable transmission of current. The contact suspension arms 14 are brush filaments or brush bundles capable of transmitting an electric current, and the contact between the contact suspension arms 14 and the electrical ring 6 is an elastic contact.

In this embodiment, a check assembly 7 for preventing the rotation shaft from reversely rotating is further disposed between the rotation shaft 1 and the support frame 2, the check assembly 7 enables the rotation shaft 1 to rotate only in one direction, and when the rotation shaft 1 reversely rotates, the rotation shaft 7 can be limited in rotation.

In this embodiment, the non-return assembly 7 comprises an internal planet wheel 12 fitted between the rotating shaft 1 and the support frame 2 and rotating synchronously with the rotating shaft 1, i.e. the planet wheel 12 is located between two concentric rings of the rotating shaft 1 and the support frame 2. A plurality of grooves 9 are formed in the circumferential direction of the outer peripheral surface of the inner star 12, and a space whose pitch gradually changes in the circumferential direction is formed between the grooves 9 and the support frame 2, and has a large space portion larger than the outer diameter of the rollers 10 fitted in the grooves 9 and a small space portion smaller than the outer diameter of the rollers 10. A preloaded spring 11, one end of which is fixed to the side wall of the groove 9, provides a force for the roller 10 to move from a large space portion to a small space portion, and presses the roller 10 against the support frame 2, preventing relative rotation between the support frame 2 and the inner star wheel.

In this embodiment, the space between the groove 9 and the support frame 2 is gradually reduced in a clockwise direction, so that, when the rotating shaft 1 rotates clockwise, the internal star wheel 12 also rotates clockwise under the driving of the rotating shaft 1, and at this time, the roller 10 compresses the pre-tightening spring 11 under the action of the support frame 2, and moves from a small space to a large space, so that the internal star wheel 12 can rotate freely relative to the support frame 2. When the rotating shaft 1 drives the inner star wheel 12 to rotate anticlockwise, the roller 10 is pressed on the support frame 2 under the action of the pre-tightening spring 11, and the roller 10 does not have power for compressing the pre-tightening spring 11 to move and give way, so that the roller 10 is clamped between the inner star wheel 12 and the support frame 2 and is locked, the anticlockwise rotation of the rotating shaft 1 is prevented, and the non-return effect is achieved.

A flange plate used for being connected with a static end is arranged on a support frame 2, and when a rotating shaft is in non-return state, torque load is transmitted to the static end from the support frame 2 through a roller. In order to enhance the strength of the support frame, the support frame is made of quenched bearing steel.

In this embodiment, the recess 9 is open on one side and comprises only a bottom and a side wall, preferably 90 degrees between the bottom and the side wall, and a vertical plane passing through the center of the axis of rotation 1 passes through the side wall. Preferably, the number of the grooves 9 is 4, and the surfaces of the side walls of the two grooves 9 distributed oppositely pass through the center of the rotating shaft 1.

In this embodiment, only one check assembly 7 is provided, which is located on the side of the support frame 2 near the stationary end (the rotating shaft near the power-driven end). Preferably, the check assembly 7 is located inside the support bearing, i.e. the check assembly 7 is further away from the stationary end than the support bearing. However, in other embodiments, more than one check assembly 7 may be provided, which may be located at one end of the rotating shaft 1 or distributed at two ends of the rotating shaft.

In this embodiment, the inner star wheel 12 and the rotating shaft 1 are connected by a flat key 8 to achieve circumferential rotation synchronization.

The contrary subassembly that ends of this embodiment only need process and cooperate roller and pretension spring can realize preventing reversing to the rotation axis the internal star gear, not only is convenient for process and assembly, does not influence the structural strength of rotation axis and support frame moreover.

The reverse stopping component 7 of the embodiment is arranged, so that the electric slip ring can realize one-way reverse stopping rotation prevention, and the use requirement of special working conditions is met.

Referring to fig. 3-5, which are schematic structural views of a brush holder assembly 3 of an electrical slip ring according to embodiment 2 of the present invention, in this embodiment, the brush holder assembly 3 can adjust a contact pressure between the contact cantilevers 14 and the conductive ring 6 by an angle adjustment device that changes an opening angle of the contact cantilevers 14 (i.e., an included angle between two contact cantilevers that contact the same conductive ring 6).

In the embodiment of the present invention, there is one angle adjusting means, which can simultaneously adjust the opening angle of all the contact arms 14 on the brush holder assembly 3. However, in other embodiments, the angle adjusting device has a plurality of angle adjusting devices, and two contact cantilevers 14 contacting with the same conductive ring 6 correspond to one angle adjusting device, so that the opening angle of the contact cantilevers 14 corresponding to different conductive rings 6 can be selectively adjusted to meet the contact pressure requirements of different conductive rings and the contact cantilevers 14, and when a part of the contact cantilevers are worn, the contact force between the contact cantilevers and the conductive rings can be adjusted in a targeted manner to meet the use requirements, and the service life of the contact cantilevers can be prolonged.

Specifically, in this embodiment, the angle adjusting device includes a guide rail 17, two horizontal sliders 16 slidably disposed on the guide rail 17 and arranged opposite to each other, a vertical slider 18 pressing on the two horizontal sliders 16, an adjusting screw 15 pressing on the vertical slider 18, and a pressing elastic member 19 located between the horizontal slider 16 and the guide rail 17 and providing an elastic force for the two horizontal sliders 16 to slide relative to each other. The pressing elastic member 19 is a spring made of polyurethane.

The guide rails 17 are fixed to the bottom of the circuit board 13 and extend in the radial direction of the rotating shaft 1 (the distribution direction of the two contact cantilevers contacting the same conductive ring). The vertical slide block 18 is in sliding fit with the two horizontal slide blocks 16 through an inclined surface, so that the vertical movement of the vertical slide block 18 is converted into the horizontal movement of the horizontal slide blocks 16.

The adjusting screw 15 is screwed on the circuit board 13 and provides a downward movement power for the vertical slider 18, when the adjusting screw 15 is fixed at a certain position, the vertical slider 18 is pressed on the horizontal slider 16 by the adjusting screw 15, and the horizontal slider 16 is balanced under the action of the vertical slider 18 and the pressing elastic element 19. When the opening angle of the contact suspension 14 needs to be increased, the vertical slider 18 is moved downward by the adjusting screw 15, and the two horizontal sliders 16 compress the pressing elastic member 19 and slide toward the end of the guide rail 17, so that the ends of the two horizontal sliders 16 far away from the vertical slider 18 are in contact with the contact suspension 14 and push the contact suspension 14 outward to increase the opening angle.

In this embodiment, the contact cantilever 14 is a brush filament 141, two rows of brush filaments 141 are uniformly distributed on the circuit board 13 along the width direction, a pair of brush filaments oppositely distributed along the width direction is in contact with the same conductive ring 6, and the included angle of each pair of brush filaments is adjusted by the same angle adjusting device, so as to change the contact pressure between the brush filaments and the conductive ring.

In this embodiment, before the height of the adjusting screw 15 is adjusted, the pressing elastic member 19 presses the horizontal slider 16, and the vertical slider 18 is pushed to the uppermost part by the acting force on the inclined surfaces of the horizontal slider 16 and the vertical slider 18, and at this time, the arc structure of the side surface of the horizontal slider 16 does not contact with the brush wire.

When the automatic adjusting device works, the adjusting screw 15 is screwed downwards, the adjusting screw 15 pushes the vertical sliding block 18 to move downwards, the vertical sliding block 18 pushes the horizontal sliding block 16 to move horizontally outwards, the horizontal sliding block 16 moves in the positioning groove of the guide rail, the arc surface of the side surface of the horizontal sliding block is in contact with the brush wire to push the brush wire to move outwards in an expanding mode, the opening angle of the brush wire is increased to theta 1 from theta, and the opening angle theta determines the contact pressure between the brush wire 141 and the conducting ring 6, so that the contact pressure between the brush wire and the conducting ring is changed, and the dynamic adjustment of the contact force is realized.

In this embodiment, the horizontal sliding block 16 is L-shaped as a whole, and the vertical side of the L-shape is formed with an inclined plane for matching with the vertical sliding block 18, and the top of the vertical plane is in clearance fit with the lower end surface of the circuit board 13, and the inclined plane extends from the top to the bottom of the vertical side, so as to ensure that the vertical sliding block 18 has an adaptive inclined plane in the whole sliding formation to provide support and limit. The pressing elastic member 19 is located between the portion of the guide rail 17 connected to the circuit board 13 and the vertical side of the horizontal slider 16.

In this embodiment, the surface of the horizontal sliding block 16 contacting the brush filaments is a circular arc surface to prevent the brush filaments from being damaged when the brush filaments are pushed.

In other embodiments of the present invention, the contact suspension 14 is a brush bundle 142, in which case, the horizontal sliding block 16 contacts with the wire 21 of the brush bundle 142, and the contact portion of the horizontal sliding block 16 with the wire 21 is a circular arc groove capable of accommodating all the wires 21 in the same brush bundle 142.

According to the embodiment, the angle adjusting device is additionally arranged in the brush frame assembly, so that the angle of the brush wire or the brush bundle can be conveniently and quickly adjusted, and the pressure between the brush wire or the brush bundle and the conductive ring can be adjusted.

Referring to fig. 6-12, which are schematic structural views of parts in embodiment 3 of the present invention, in this embodiment, the contact cantilever 14 is a brush bundle 142, the brush bundle 142 includes a sleeve 20 and a wire 21, wherein an upper end of the wire 21 is accommodated in the sleeve 20, and the welding fixation on the circuit board 13 is realized through the sleeve 20. In order to ensure the positioning accuracy in the welding between the brush bundle 142 and the circuit board 13, the welding between the brush bundle 142 and the circuit board 13 according to the embodiment is performed by the positioning tool 100.

In this embodiment, the positioning tool 100 includes a positioning block 22, a pressure plate 23, and a fixing seat 24, where the positioning block 22 has two opposite positioning surfaces 221 for matching and positioning with the brush bundle 142, and the inclination angles of the two positioning surfaces are the same as the inclination angle of the welded brush bundle 142. And each positioning surface 221 is provided with a chute 25 for accommodating the brush bundle 142, and the inclination angle of the chute 25 is consistent with that of the positioning surface on which the chute is positioned so as to ensure the inclination angle of the brush bundle 142. The brush bunch chute 25 is divided into an upper chute 251 for positioning the sleeve 20 and a lower chute 252 for positioning the metal wire 21 along the length direction of the brush bunch chute, and the size of the upper chute 251 is larger than that of the lower chute 252, so that a step 253 is formed at the joint of the upper chute 251 and the lower chute 252, the lower end surface of the sleeve 20 is in contact with the step 253 for limiting, and the sleeve 20 is accurately positioned along the chute direction. The pressing plate 23 is of a frame structure, is sleeved on the periphery of the upper end of the positioning block 22, and has a pressing inclined surface 231 which is matched with the positioning surface 221 on the positioning block 22 to press the brush bundle 142 in the chute 25.

The upper end of the pressing plate 23 is formed with a positioning groove 232 for fixing and positioning the circuit board 13, and at this time, the upper end of the brush bundle 412 is positioned in a corresponding welding hole on the circuit board 13, and the brush bundle sleeve 20 is welded and fixed with the circuit board 13, so that the assembly of the brush holder assembly of the present invention can be completed. Preferably, the bottom of the positioning groove 232 is flush with the upper surface of the positioning block 22. In this embodiment, the positioning groove 232 at least includes a set of walls located above the positioning surface of the positioning block, and the positioning of the circuit board 13 along the axial direction of the rotating shaft engaged with the brush holder assembly is achieved by the set of walls.

In this embodiment, the compression ramp 231 is capable of compressing the sleeve 20 and the wire 21 simultaneously. And the part of the bottom of the positioning block 22 corresponding to the lower end of the lower chute 252 is also provided with a limiting flange 254 for limiting the tail of the metal wire 21. The limiting rib 254 can not only support and limit the metal wire 21, but also restrain the tail of the metal wire 21, and prevent the tail of the metal wire from being exploded to separate from the lower chute 251 to influence the matching of the pressing plate 23 and the metal wire 21. Preferably, the limiting rib 254 is formed by extending the edge of the positioning block 22 upward.

In order to guarantee the positioning precision of the brush bundle, the precision tolerance of the positioning block 22 is controlled within 0.02 mm.

Because of the special requirement of the working condition, the working condition that the brush bundle angle is different on the same mounting plate component can exist, in order to meet the requirement, the positioning surface 221 is at least divided into two sections along the distribution direction of the chute 25, the inclination angle of each section is different, so that the chute 25 distributed on the positioning surface 221 at least has two different inclination angles, and the brush bundle positioned by the chute 25 at least has two different inclination angles. The inclined angle of each part of the pressing inclined plane 231 on the pressing plate 23 is correspondingly consistent with that of each part of the positioning plane 221, so that the pressing inclined plane 231 can press brush bundles with different inclined angles into the corresponding inclined grooves 25, and the brush bundles can be fixedly positioned.

In an embodiment of the present invention, the positioning block 22 is divided into at least two parts according to the difference of the inclination angles of the positioning surfaces 221, the inclination angles of the positioning surfaces of the two parts are different, and the pressing plate 23 is still of an integrated structure. In order to prevent relative displacement between different parts of different positioning blocks 22, the different parts of the positioning blocks 22 are connected by bolts, and the middle part of each part is provided with bolt holes extending along the distribution direction of the inclined grooves 25, and bolts penetrate through the bolt holes to connect and fix the parts together.

In this embodiment, the positioning block 22 is divided into two parts, including a first positioning block 222 and a second positioning block 223 that are butted along the distribution direction of the chute 25 on the same positioning surface, wherein the inclination angles of the two positioning surfaces of the first positioning block 222 are different from the inclination angles of the two positioning surfaces of the second positioning block 223, so that the brush bundle positioned by the chute on the first positioning block 222 and the brush bundle positioned by the chute on the second positioning block 223 have different inclination angles, and thus the brush holder assembly has brush bundles with two inclination angles, so as to meet the requirements of special working conditions.

In this embodiment, the pressing plate 23 is also formed by two abutting-joint portions along the distribution direction of the chutes on the same positioning surface, namely a first pressing plate 233 and a second pressing plate 234, wherein the first pressing plate 233 and the second pressing plate 234 are both U-shaped, and two oppositely-distributed pressing slopes of the first pressing plate 233 have the same inclination angle corresponding to the two positioning surfaces on the first positioning block 222, and are used for pressing the brush bundles in the chutes on the two positioning surfaces of the first positioning block 222; the two pressing slopes distributed oppositely on the second pressing plate 234 have an angle matched and attached with the two positioning faces on the second positioning block 223, and are used for pressing the brush bundles in the inclined grooves on the second positioning block 223.

In this embodiment, the positioning device further includes a fixing base 24 for aligning the first positioning block 222 and the second positioning block 223, the fixing base 24 has a pair of limiting protrusions 241 distributed oppositely, the limiting protrusion 221 is in clearance fit with a portion below the positioning surfaces of the first limiting block 222 and the second limiting block 223 to align the first positioning block 222 and the second positioning block 223, and the limiting protrusion 241 can also prevent the first positioning block 222 and the second positioning block 223 from moving in the process of connecting the first positioning block 222 and the second positioning block 223 through bolts, so that bolt holes cannot be aligned, and the like.

When the positioning tool 100 of the embodiment is used, the first positioning block 222 and the second positioning block 223 are firstly installed on the fixing base 24, the inner walls of the limiting protrusions 241 at the two sides of the fixing base 24 are in small-gap fit with the side walls of the sides where the positioning surfaces of the two positioning blocks are located, so that the two positioning blocks are aligned, and then the two positioning blocks are fastened through the bolt holes in the middle of the two positioning blocks to prevent relative movement between the two positioning blocks.

The brush bundles are arranged in the chute on the positioning surface, then the first pressing plate and the second pressing plate are respectively pressed on the peripheries of the upper ends of the first positioning block and the second positioning block, two pressing inclined planes in the first pressing plate correspond to the inclined angles of the two positioning surfaces on the first positioning block, and two pressing inclined planes in the second pressing plate correspond to the inclined angles of the two positioning surfaces on the second positioning block, so that the brush bundles are pressed tightly during welding. The limiting bulges 241 on the two sides of the first pressing plate and the second pressing plate form a positioning groove for positioning the circuit board, and the positioning groove is in small clearance fit with the circuit board 13 to realize the accurate positioning of the circuit board. And finally, welding the circuit board and the brush bundle.

The positioning tool 100 of the embodiment not only can realize the precise positioning and assembling of the brush bundles with the same angle on the same brush holder assembly, but also can realize the precise positioning and assembling of the brush bundles with different angles on the same brush holder assembly.

In order to detect the wear life of the conductive slip ring, embodiment 4 of the present invention provides a device for testing the wear life of the conductive slip ring, where the device for testing the wear life of the conductive slip ring can test the wear life of the conductive slip ring. The testing device comprises a servo motor 26, a fixed rack 27 and a rotating shaft 1, wherein the rotating shaft 1 is rotatably assembled in the fixed rack 27 through a supporting bearing 4, and the servo motor 26 is used for driving the rotating shaft 1 to rotate. In this embodiment, the servo motor 26 is connected to the rotary shaft flange 101 at the end of the rotary shaft 1 through a servo motor flange 261 at the end of the output shaft, wherein the servo motor flange 261 and the rotary shaft flange 101 are fixed by a rubber flexible pin 102, and function as an elastic coupling.

The rotating shaft flange plate 101 and the rotating shaft 1 are positioned by adopting a conical surface, and the coaxiality of the rotating shaft flange plate 101 and the rotating shaft 1 is ensured, namely the rotating shaft flange plate 101 comprises a flange plate connected with the servo motor flange plate 261 and a taper sleeve matched with a tapered cavity at the end part of the rotating shaft 1, and the taper sleeve is fastened with the bottom of the tapered cavity through bolts.

The conducting ring assembly is formed by assembling the conducting ring 6 to be tested and the insulating ring 5, the conducting ring assembly is fixed on the periphery of the rotating shaft 1, in the embodiment, one end of the conducting ring assembly is axially limited by matching with the elastic snap spring 103 assembled on the rotating shaft 1, and the other end of the conducting ring assembly is axially limited by matching with the compression sleeve 105 and the compression nut 104 fixed on the rotating shaft 1. Specifically, jump ring 103 assembles in the annular that rotation axis 1 is close to servo motor 26 one side, the periphery that servo motor 26 one end was kept away from to rotation axis 1 is equipped with and is used for the screw thread with gland nut 104 cooperation locking, compress tightly cover 105 by gland nut 104 compress tightly on the terminal surface that servo motor 26 one side was kept away from to the conducting ring subassembly, realize spacing to the axial of conducting ring subassembly.

The brush holder assembly 3 to be tested is fixed on the upper side of the fixed rack 27, the brush holder assembly 3 is contacted with the corresponding conductive rings 3 through the contact cantilevers 14 on the brush holder assembly, and the contact pressure between at least two conductive rings 3 and the contact cantilevers 14 is different.

In this embodiment, the brush holder assembly 3 is fixed to the stationary gantry 27 by a brush holder adjustment device 31, and the brush holder adjustment device 31 can adjust the position of the brush holder assembly 3 in the vertical direction to change the contact pressure between the contact cantilever 14 and the conductive ring 6. In this embodiment, the brush holder adjusting device 31 includes two brush holder fixing slots 311, an adjusting screw 314, an adjusting nut 312 and a supporting spring 313, where the two fixing slots 311 are fixed, the adjusting screw 314 is fixed at the bottom of each fixing slot 311, a screw rod of the adjusting screw 314 extends upwards into the fixing slot 311, and the adjusting nut 312 is screwed on the screw rod, through holes which are in sliding fit with the screw rod of the adjusting screw 314 are arranged at two ends of the circuit board 13 of the brush holder assembly 3, and the supporting spring 313 is sleeved on the screw rod of the adjusting screw 314 and provides upward movement power for the circuit board 13, so that the upper end surface of the circuit board 13 is pressed against the adjusting nut 312, and the circuit board 13 is positioned in the vertical direction. When the position of the brush holder assembly 3 in the vertical direction (the contact pressure between the contact cantilever 14 and the conductive ring) needs to be adjusted, the brush holder assembly 3 can move in the vertical direction only by adjusting the adjusting nut 314 on the upper portion, so that the adjustment of the contact pressure between the contact cantilever 14 and the conductive ring 6 is realized. In this embodiment, there are at least two brush holder assemblies 3, and each brush holder assembly 3 is fixed on the fixed rack 27 through a brush holder adjusting device, so that the brush holder assemblies 3 on the fixed rack can be adjusted to different heights as required, and the contact cantilever wear life tests with different contact pressures can be realized on the same testing machine.

In another embodiment of the present invention, the circuit board 13 of the brush holder assembly 31 is directly fixed on the upper side of the stationary stage, and the brush holder assembly 31 has the angle adjusting means for adjusting the opening angle of the contact cantilever 14 in embodiment 2. The angle adjustment means enables the opening angle of the contact cantilever 14 in the brush holder assembly 31 to be different at least with which two conductive rings are in contact. So as to realize the wear life test of the contact cantilever with different contact pressures on the same testing machine.

In another embodiment of the present invention, the contact cantilever in the same brush holder assembly 31 has at least two different tilt angles (opening angles), and in this embodiment, the contact cantilever is a brush bundle, and the welding fixation between the brush bundle and the circuit board is realized by the positioning tool described in embodiment 3, so as to meet the requirement of the wear life test of the contact cantilever for realizing different contact pressures on the same testing machine.

The testing device simulates the actual installation and use working conditions of the conductive slip ring, realizes the test of the wear performance between the conductive ring and the brush wire/brush bundle, can adjust the contact pressure between the brush wire/brush bundle and the conductive ring, and can realize the contrast test of various schemes on one testing device.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A brush holder assembly for a conductive slip ring comprises a circuit board and a contact cantilever for contact conduction with a conductive ring, and is characterized by further comprising an angle adjusting device for changing the opening angle of the contact cantilever.

2. The brush holder assembly for a conductive slip ring according to claim 1, wherein: the angle adjusting device comprises a guide rail fixed below the circuit, and two horizontal sliding blocks are arranged on the guide rail in a sliding mode along the length direction of the guide rail; the vertical sliding blocks pressed on the two horizontal sliding blocks can move upwards when the two horizontal sliding blocks move relatively and move downwards when the two horizontal sliding blocks move oppositely; the compressing elastic piece between the horizontal sliding block and the guide rail enables the horizontal sliding block to push the vertical sliding block to move upwards, the adjusting screw screwed on the circuit board is used for limiting the vertical sliding block to move upwards, and when the adjusting screw moves downwards, the vertical sliding block can push the two horizontal sliding blocks to move back to back, so that the two horizontal sliding blocks can push the contact cantilever to increase the opening angle of the cantilever.

3. The brush holder assembly for a conductive slip ring according to claim 2, wherein: the angle adjusting device is provided with one angle adjusting device, and can simultaneously realize the adjustment of the opening angles of all the contact cantilevers.

4. The brush holder assembly for a conductive slip ring according to claim 2, wherein: the angle adjusting devices are multiple, and the opening angles of the contact cantilevers corresponding to the different conducting rings can be adjusted to be different through the corresponding angle adjusting devices.

5. The brush holder assembly for a conductive slip ring according to claim 2, wherein: the vertical sliding block is in sliding fit with the two horizontal sliding blocks through the inclined plane, so that the vertical movement of the vertical sliding block is converted into the horizontal movement of the horizontal sliding block.

6. The brush holder assembly for a conductive slip ring according to claim 2, wherein: the contact cantilever is a brush wire, and the part of the horizontal sliding block, which is contacted with the brush wire, is an arc surface.

7. The brush holder assembly for a conductive slip ring according to claim 2, wherein: the contact cantilever is a brush bundle, the horizontal sliding block is in contact with the metal wires of the brush bundle, and the contact part is an arc groove capable of accommodating the metal wires.

8. The brush holder assembly for a conductive slip ring according to claim 5, wherein: the horizontal sliding block is integrally L-shaped, the top of a vertical edge of the L-shaped horizontal sliding block is in clearance fit with the lower end face of the circuit board, an inclined plane extending from the top to the bottom is formed on the vertical edge, and the inclined plane is in sliding fit with the vertical sliding block.

9. The utility model provides a conductive slip ring, its includes rotation axis, support frame and brush yoke subassembly, and wherein the rotation axis passes through support bearing and rotates the assembly at the support frame inner circle, and the brush yoke subassembly is fixed at the support frame outer lane, its characterized in that: the brush holder assembly according to any one of claims 1 to 8.

10. The conductive slip ring of claim 9, wherein: wherein a non-return component for preventing the rotating shaft from reversely rotating is arranged between the rotating shaft and the supporting frame.

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