New energy motor insulation bearing

Abstract

A new energy motor insulating bearing disclosed by the present invention comprises an outer ring and an inner ring, a roller is arranged between the outer ring and the inner ring in a rolling manner, the inner circumferential wall of the inner ring is sleeved with an insulating shaft sleeve, the insulating shaft sleeve is arranged in a split manner to form two sub-sleeve bodies, and the two sub-sleeve bodies are arranged in a semi-circular ring manner. Connecting grooves are formed in the contact faces of the two sub-sleeve bodies respectively, connecting blocks are arranged on the portions, on one sides of the connecting grooves, of the sub-sleeve bodies respectively, the connecting blocks are matched with the connecting grooves of the other sub-sleeve body in an inserted mode, the connecting blocks are in clearance fit with the connecting grooves, and notch grooves are formed in the positions, corresponding to the connecting grooves, of the edges of the side walls of the sub-sleeve bodies. The notch grooves are communicated with the connecting grooves, the notch grooves in the two sub-sleeve bodies are combined to form an inserting hole, a plug pin is inserted into the inserting hole, and the connecting blocks on the two sub-sleeve bodies are arranged on the two sides of the plug pin respectively. The structure is simple, effective insulation is achieved, stability of structural combination is guaranteed, and the good using effect is achieved.

Description

Technical Field

[0001] The invention relates to an insulating bearing for a new energy motor. Background Art

[0002] Existing insulating bearings combine the insulating layer and the bearing together. Currently, the only way to combine the coating and the inner ring is through a special process. In actual production, whether it is insulating resin or ceramic insulation, a special injection molding process or spraying process is required to achieve the combination of the coating and the bearing. Taking the injection molding process as an example, the insulating resin is injected into the mold under high temperature and high pressure. The temperature, pressure and time parameters need to be precisely controlled. If there is a slight deviation, the bonding strength between the resin and the inner ring of the bearing will decrease, causing the insulating layer to peel off during use. The spraying process is also complicated. The movement speed of the spray gun, the spraying angle, and the coating thickness all need to be strictly controlled, otherwise it will be difficult to form a uniform insulating layer. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an insulating bearing for a new energy motor, which has a simple structure and effectively insulates while ensuring the stability of the structural combination and has a good use effect.

[0004] To achieve the above-mentioned purpose, the present invention provides an insulating bearing for a new energy motor, comprising an outer ring and an inner ring, a roller is arranged rollingly between the outer ring and the inner ring, an insulating sleeve is sleeved on the inner circumferential wall of the inner ring, and the insulating sleeve is divided into two sub-sleeve bodies, both of which are arranged in semicircular rings, and connecting grooves are respectively opened on the contact surfaces of the two sub-sleeve bodies, and the sub-sleeve bodies are respectively provided with connecting blocks on one side of the connecting groove, and the connecting blocks are plug-matched with the connecting groove of the other sub-sleeve body, and the connecting blocks are clearance-matched with the connecting groove, and the side wall edge of the sub-sleeve body is provided with a notch groove corresponding to the position of the connecting groove, and the notch groove is connected with the connecting groove, and the notch grooves on the two sub-sleeve bodies are combined to form a socket, and a pin is inserted in the socket, and the connecting blocks on the two sub-sleeve bodies are arranged on both sides of the pin.

[0005] The beneficial effect of this arrangement is that the structure of the two semicircular sub-sleeves breaks the limitations of traditional one-piece molding. When installation is required, it is only necessary to align the connecting blocks of the two sub-sleeves with the connecting grooves of the other sub-sleeves, and simple plugging can complete the initial positioning. Even in a narrow or space-restricted motor, the installation operation can be easily completed. After the pin is inserted into the socket formed by the combination of the notched grooves of the two sub-sleeves, a tightening force can be generated on the sub-sleeves, so that the connecting block and the connecting groove fit tightly to achieve a tight-fitting installation. This tensioning connection method not only ensures a stable connection between the insulating sleeve and the inner ring of the bearing, but also effectively disperses the vibration and stress generated during the operation of the motor, avoids the loosening of the sleeve, and fundamentally eliminates the problem of insulation failure caused by loose installation. During later maintenance and disassembly, the two sub-sleeves can be easily separated by simply pushing the pin out of the socket.

[0006] As a further setting of the present invention, a through groove is provided on the contact surface between the bolt and the connecting block, and a bimetallic strip is arranged in the through groove. The bimetallic strip is arranged along the length direction of the bolt. One end of the bimetallic strip is connected to the through groove, and the other end is a free end.

[0007] The beneficial effects of such a setting are as follows: With such a setting, when the bearing is running, the temperature inside the motor gradually rises. Due to the different thermal expansion coefficients of the two metals, the bimetallic strip will bend and deform towards the side with a smaller expansion coefficient. The bimetallic strip here belongs to the prior art. As a preference, a combination of brass - invar materials can be used, or a combination of aluminum - iron nickel alloy (No. 42) materials can be used. Details will not be elaborated here. The thrust generated by this deformation can push the connecting block and the connecting groove to fit more closely, enhancing the tightening effect. Even under high - temperature and high - load working conditions, it can ensure that the insulating bushing is stable and does not loosen. When the bearing stops working and the temperature drops, the bimetallic strip will return to its initial state, eliminating the additional tightening force, so that the bolt can be easily pulled out during disassembly, and the separation of the split body will not be affected by the residual deformation of the bimetallic strip, truly realizing the dual functions of "strengthening fastening during operation and facilitating disassembly during maintenance".

[0008] As a further setting of the present invention, an embedded groove is provided on the contact surface between the connecting block and the bolt.

[0009] The beneficial effects of such a setting are as follows: With such a setting, the embedded groove structure on the contact surface between the connecting block and the bolt provides an accurate acting fulcrum for the deformation function of the bimetallic strip. When the bearing runs and the temperature rises, and the free end of the bimetallic strip bends and deforms, its end can be directly embedded into the embedded groove, forming a mechanical locking structure of "strip - groove" abutment. This design converts the thermal expansion stress of the bimetallic strip into a directional extrusion force, further reducing the fitting clearance between the connecting block and the connecting groove, and even achieving an interference fit state, significantly improving the overall anti - vibration and anti - impact performance of the bushing. At the same time, the geometric limiting effect of the embedded groove can prevent structural damage caused by excessive deformation of the bimetallic strip, ensuring the stability of the tight - fitting effect under high - temperature working conditions. When the temperature drops and the bimetallic strip resets, the smooth inner wall of the embedded groove can reduce the frictional resistance, making the bolt disassembly process smoother, achieving a balance between function enhancement and operation convenience.

[0010] As a further setting of the present invention, a limiting flange is provided at one end of the bolt close to the free end of the bimetallic strip.

[0011] The beneficial effects of such a setting are as follows: With such a setting, during installation, the limiting flange at the end of the plug precisely defines the insertion depth of the plug through physical contact with the end face of the split sleeve body. At the same time, when the bearing operates and heats up, and the free end of the bimetallic strip deforms towards the groove, the limiting flange synchronously provides a reverse abutting force, forming a two-way clamping of "the flange abuts forward and the bimetallic strip pushes backward". This two-way action can not only offset the axial thrust load generated during the high-speed operation of the motor, but also improve the anti-torsion stiffness of the bushing through the balanced distribution of stress.

[0012] As a further setting of the present invention, the contact surfaces of the two split sleeve bodies are roughened.

[0013] The beneficial effects of such a setting are as follows: With such a setting, the roughening treatment of the contact surface of the split sleeve body constructs a basic stable layer by increasing the surface friction coefficient. After the plug is inserted and tightened, the rough surface further forms a synergistic effect with the extrusion force of the bimetallic strip, converting the single-point force into a surface contact stress distribution, effectively suppressing the fretting wear between the contact surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the insulating bushing in the embodiment of the present invention; Figure 2 is an exploded structural diagram of the insulating bushing in the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The embodiments of the insulating bearing of the new energy motor of the present invention are as Figures 1 to 2As shown in the figure, the bearing structure is not drawn in the figure. Therefore, the insulating bushing will be described. The insulating bushing is divided into two split bushing bodies 1. Both of the two split bushing bodies 1 are in a semi-circular ring shape. Connecting grooves 12 are respectively formed on the contact surfaces of the two split bushing bodies 1. Connecting blocks 11 are respectively arranged on one side of the split bushing body 1 in the connecting groove 12. The connecting block 11 is inserted and matched with the connecting groove 12 of the other split bushing body 1. The connecting block 11 and the connecting groove 12 are in clearance fit. A notch groove 13 is arranged at the position corresponding to the connecting groove 12 on the side edge of the side wall of the split bushing body 1. The notch groove 13 communicates with the connecting groove 12. The notch grooves 13 on the two split bushing bodies 1 are combined to form a socket hole. A pin 2 is inserted into the socket hole. The connecting blocks 11 on the two split bushing bodies 1 are respectively arranged on both sides of the pin 2. The beneficial effect of such a setting is as follows: With such a setting, the structure of the two semi-circular ring split bushing bodies 1 breaks the limitation of the traditional integral molding. When installation is required, only the connecting blocks 11 of the two split bushing bodies 1 need to be aligned with the connecting grooves 12 of the other split bushing body 1, and simple insertion can complete the preliminary positioning. Even inside a narrow or space-constrained motor, the installation operation can be easily completed. After the pin 2 is inserted into the socket hole formed by the combination of the notch grooves 13 of the two split bushing bodies 1, a tightening force can be generated on the split bushing body 1, enabling the connecting block 11 and the connecting groove 12 to be tightly fitted to achieve a tight fit installation. This tightening connection method not only ensures the stable connection between the insulating bushing and the inner ring of the bearing, but also can effectively disperse the vibration and stress generated during the operation of the motor, avoid the loosening of the bushing, and fundamentally eliminate the insulation failure problem caused by insecure installation. During later maintenance and disassembly, only the pin 2 needs to be pushed out of the socket hole, and the two split bushing bodies 1 can be easily separated.

[0016] As a further setting of the present invention, a through groove is formed on the contact surface of the pin 2 and the connecting block 11. A bimetallic strip 22 is arranged in the through groove. The bimetallic strip 22 is arranged along the length direction of the pin 2. One end of the bimetallic strip 22 is connected to the through groove, and the other end is a free end. The beneficial effect of such a setting is as follows: With such a setting, when the bearing rotates, the temperature inside the motor gradually rises. Due to the different thermal expansion coefficients of the two metals of the bimetallic strip 22, the bimetallic strip 22 will bend and deform towards the side with a smaller expansion coefficient. The bimetallic strip 22 here belongs to the prior art and is made of a combination of brass and invar, and will not be elaborated in detail here. The thrust generated by this deformation can push the connecting block 11 and the connecting groove 12 to be further tightly fitted, enhancing the tightening effect. Even under high-temperature and high-load working conditions, it can ensure that the insulating bushing is stable and does not loosen. When the bearing stops working and the temperature drops, the bimetallic strip 22 will return to its initial state, eliminating the extra tightening force, so that the pin 2 can be easily pulled out during disassembly, and the separation of the split bushing body 1 will not be affected by the residual deformation of the bimetallic strip 22, truly realizing the dual functions of "strengthening fastening during operation and facilitating disassembly during maintenance".

[0017] As a further arrangement of the present invention, a groove is provided on the contact surface between the connecting block 11 and the plug pin 2. The beneficial effect of such an arrangement is as follows: With such a setting, the groove structure on the contact surface between the connecting block 11 and the plug pin 2 provides an accurate acting fulcrum for the deformation function of the bimetallic strip 22. When the bearing operates and heats up, and the free end of the bimetallic strip 22 bends and deforms, its end can be directly inserted into the groove, forming a mechanical locking structure of "strip - groove" abutment. This design converts the thermal expansion stress of the bimetallic strip 22 into a directional extrusion force, further reducing the clearance between the connecting block 11 and the connecting groove 12, and even achieving an interference fit state, significantly improving the overall anti - vibration and anti - impact performance of the bushing. At the same time, the geometric limiting effect of the groove can prevent structural damage caused by excessive deformation of the bimetallic strip 22, ensuring the stability of the tight - fitting effect under high - temperature working conditions. When the temperature drops and the bimetallic strip 22 resets, the smooth inner wall of the groove can reduce the frictional resistance, making the disassembly process of the plug pin 2 smoother, achieving a balance between function enhancement and operational convenience.

[0018] As a further arrangement of the present invention, a limiting flange 21 is provided at one end of the plug pin 2 near the free end of the bimetallic strip 22. The beneficial effect of such an arrangement is as follows: With such a setting, the limiting flange 21 at the end of the plug pin 2 accurately defines the insertion depth of the plug pin 2 through physical abutment with the end face of the split sleeve body 1 during installation. At the same time, when the bearing operates and heats up, and the free end of the bimetallic strip 22 deforms towards the groove, the limiting flange 21 simultaneously provides a reverse abutting force, forming a two - way clamping of "the flange abuts forward and the bimetallic strip 22 pushes backward". This two - way action can not only offset the axial thrust load generated during the high - speed operation of the motor, but also improve the anti - torsional stiffness of the bushing through the balanced stress distribution.

[0019] As a further arrangement of the present invention, the contact surfaces of the two split sleeve bodies 1 are roughened. The beneficial effect of such an arrangement is as follows: With such a setting, the roughening treatment of the contact surfaces of the split sleeve bodies 1 constructs a basic stable layer by increasing the surface friction coefficient. After the plug pin 2 is inserted and tightened, the rough surface further forms a synergistic effect with the extrusion force of the bimetallic strip 22, converting the single - point force into a surface - contact stress distribution, effectively suppressing the fretting wear between the contact surfaces.

[0020] The above examples are only one of the preferred specific examples of the present invention. The ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A new energy motor insulated bearing, comprising an outer ring and an inner ring, with rollers rotatably arranged between the outer ring and the inner ring, characterized in that: An insulating bushing is sleeved on the inner peripheral wall of the inner ring. The insulating bushing is separately provided and formed into two split bushing bodies. Both split bushing bodies are arranged in a semi-circular ring shape. Connecting grooves are respectively formed on the contact surfaces of the two split bushing bodies. Connecting blocks are respectively arranged on one side of the connecting grooves of the split bushing bodies. The connecting blocks are inserted and matched with the connecting grooves of the other split bushing bodies. The connecting blocks and the connecting grooves are in clearance fit. Notch grooves are arranged at the positions corresponding to the connecting grooves on the side edges of the side walls of the split bushing bodies. The notch grooves communicate with the connecting grooves. The notch grooves on the two split bushing bodies are combined to form an insertion hole. A pin is inserted into the insertion hole. The connecting blocks on the two split bushing bodies are respectively arranged on both sides of the pin.

2. The insulated bearing of the new energy motor according to claim 1, wherein: A through groove is formed on the contact surface of the pin and the connecting block. A bimetallic strip is arranged in the through groove. The bimetallic strip is arranged along the length direction of the pin. One end of the bimetallic strip is connected to the through groove, and the other end is a free end.

3. The insulated bearing of the new energy motor according to claim 2, characterized in that: An embedding groove is arranged on the contact surface of the connecting block and the pin.

4. The new energy motor insulated bearing according to claim 3, characterized in that: A limiting flange is arranged at one end of the pin close to the free end of the bimetallic strip.

5. The insulating bearing of the new energy motor according to claim 1, wherein: The contact surfaces of the two split bushing bodies are roughened.

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