New energy motor insulated bearings

Abstract

The present invention discloses an insulating bearing for a new energy motor, comprising an outer ring and an inner ring, wherein a roller is provided rollingly between the outer ring and the inner ring, an insulating sleeve is sleeved on the inner circumferential wall of the inner ring, the insulating sleeve is split into two sub-sleeve bodies, both of which are arranged in a semicircular ring shape, and a connecting groove is respectively provided on the contact surface of the two sub-sleeve bodies, wherein the sub-sleeve bodies are respectively provided with a connecting block on one side of the connecting groove, the connecting block is plugged into and matched with the connecting groove of the other sub-sleeve body, the connecting block and the connecting groove have a clearance fit, a notch is provided on the side wall edge of the sub-sleeve body at a position corresponding to the connecting groove, the notch is connected to the connecting groove, the notch on the two sub-sleeve bodies is combined to form a socket, a pin is inserted in the socket, and the connecting blocks on the two sub-sleeve bodies are respectively arranged on both sides of the pin. The structure is simple, effectively insulates, ensures the stability of the structural combination, and has a good use effect.

Description

Technical Field

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

[0002] Existing insulated bearings combine the insulating layer and the bearing together, and currently this can only be achieved through a special process that combines the coating and the inner ring. In actual production, whether it is insulating resin or ceramic insulation, a special injection molding 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 must 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 complex. 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, effectively insulates, ensures the stability of the structural combination, and has good use effect.

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

[0005] The beneficial effect of this arrangement is that the structure of the two semi-circular 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 inside 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 together to achieve a tight-fitting installation. This tensioning connection method not only ensures a firm 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 configuration of the present invention, a through slot is provided on the contact surface between the pin and the connecting block, a bimetallic strip is provided in the through slot, the bimetallic strip is provided along the length direction of the pin, one end of the bimetallic strip is connected to the through slot, and the other end is a free end.

[0007] This arrangement has the beneficial effect of gradually increasing the internal temperature of the motor during bearing operation. Due to the different thermal expansion coefficients of the two metals, the bimetallic strip bends and deforms toward the side with the lower coefficient of expansion. The bimetallic strip is conventionally used and preferably utilizes a brass-Invar material combination or an aluminum-iron-nickel alloy (No. 42). The specifics are not elaborated here. The thrust generated by this deformation further tightens the connection block and the connection groove, enhancing the tensioning effect and ensuring that the insulating sleeve remains secure even under high-temperature and high-load conditions. When the bearing stops operating and the temperature drops, the bimetallic strip returns to its original state, eliminating the additional tensioning force and allowing the latch to be easily removed during disassembly. This ensures that the separation of the housings is not affected by residual deformation of the bimetallic strip, truly achieving the dual functions of "enhanced fastening during operation and convenient disassembly during maintenance."

[0008] As a further configuration of the present invention, a bezel groove is provided on the contact surface between the connecting block and the latch.

[0009] This advantageous arrangement provides a precise fulcrum for the bimetallic strip's deformation function by creating a groove at the contact surface between the connecting block and the latch. When the bearing heats up and the free end of the bimetallic strip bends and deforms, its distal end snaps directly into the groove, forming a mechanical locking mechanism for the "strip-slot" abutment. This design converts the bimetallic strip's thermal expansion stress into a directional compressive force, further reducing the clearance between the connecting block and the connecting groove, even achieving an interference fit and significantly improving the overall vibration and impact resistance of the sleeve. Furthermore, the geometric restraint of the groove prevents structural damage to the bimetallic strip caused by excessive deformation, ensuring a stable tight fit even under high-temperature conditions. When the temperature drops and the bimetallic strip returns to its original position, the smooth inner wall of the groove reduces frictional resistance, making the latch removal process smoother, achieving a balance between enhanced functionality and operational convenience.

[0010] As a further configuration of the present invention, a limiting flange is provided on one end of the latch close to the free end of the bimetallic strip.

[0011] This arrangement offers the following benefits: The stop flange at the end of the latch precisely defines the insertion depth of the latch through physical contact with the end face of the split sleeve during installation. Furthermore, as the bearing heats up and the free end of the bimetallic strip deforms toward the slot, the stop flange simultaneously provides opposing pressure, creating a bidirectional clamping mechanism: the flange pushes forward and the bimetallic strip pushes back. This dual action not only offsets the axial travel load generated by high-speed motor operation but also improves the torsional stiffness of the sleeve by evenly distributing stress.

[0012] As a further configuration of the present invention, the contact surfaces of the two sub-shell bodies are roughened.

[0013] The beneficial effect of this arrangement is that, by roughening the contact surface of the sub-sleeve, a basic stability layer is constructed by increasing the surface friction coefficient. When the pin 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, thereby effectively suppressing micro-wear between the contact surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the structure of the insulating sleeve in an embodiment of the present invention;

[0015] Figure 2 Schematic diagram of the exploded structure of the insulating sleeve in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The embodiment of the insulating bearing of the new energy motor of the present invention is as follows Figures 1 to 2As shown: The bearing structure is not shown in the figure, so the insulating sleeve is explained. The insulating sleeve is divided into two sub-sleeve bodies 1. Both sub-sleeve bodies 1 are arranged in a semi-circular shape. Connecting grooves 12 are respectively provided on the contact surfaces of the two sub-sleeve bodies 1. The sub-sleeve bodies 1 are respectively provided with connecting blocks 11 on one side of the connecting groove 12. The connecting blocks 11 are plugged into the connecting groove 12 of the other sub-sleeve body 1. The connecting blocks 11 are clearance-fitted with the connecting groove 12. A notch groove 13 is provided on the side wall edge of the sub-sleeve body 1 at a position corresponding to the connecting groove 12. The notch groove 13 is connected to the connecting groove 12. The notch grooves 13 on the two sub-sleeve bodies 1 are combined to form a socket. A pin 2 is inserted into the socket. The connecting blocks 11 on the two sub-sleeve bodies 1 are respectively provided on both sides of the pin 2. The beneficial effect of this arrangement is that the structure of the two semi-circular sub-sleeve bodies 1 breaks the limitations of traditional one-piece molding. When installation is required, it is only necessary to align the connecting blocks 11 of the two sub-sleeves 1 with the connecting grooves 12 of the other sub-sleeves 1, and simply plug them in to complete the initial positioning. Even inside a narrow or space-restricted motor, the installation operation can be easily completed. After the pin 2 is inserted into the socket formed by the combination of the notched grooves 13 of the two sub-sleeves 1, it can generate a tightening force on the sub-sleeves 1, so that the connecting block 11 and the connecting groove 12 fit tightly together 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, prevents the sleeve from loosening, and fundamentally eliminates the problem of insulation failure caused by loose installation. During later maintenance and disassembly, it is only necessary to push the pin 2 out of the socket, and the two sub-sleeves 1 can be easily separated.

[0017] As a further feature of the present invention, a through slot is provided on the contact surface between the latch 2 and the connecting block 11, and a bimetallic strip 22 is provided in the through slot. The bimetallic strip 22 is arranged along the length of the latch 2, with one end of the bimetallic strip 22 connected to the through slot and the other end being a free end. The beneficial effect of this feature is that when the bearing is operating, the internal temperature of the motor gradually rises, and the bimetallic strip 22 bends and deforms toward the side with the smaller expansion coefficient due to the different thermal expansion coefficients of the two metals. The bimetallic strip 22 herein is of the prior art and is made of a brass-invar material combination, and the details will not be described in detail. The thrust generated by this deformation can push the connecting block 11 and the connecting slot 12 to further tighten, enhancing the tightening effect and ensuring that the insulating sleeve is stable and does not loosen even under high temperature and high load conditions. When the bearing stops working and the temperature drops, the bimetallic strip 22 will return to its original state, eliminating the additional tensioning force, so that the pin 2 can be easily pulled out during disassembly, and the deformation of the bimetallic strip 22 will not affect the separation of the sub-housing 1, truly realizing the dual functions of "enhanced fastening during operation and convenient disassembly during maintenance".

[0018] As a further feature of the present invention, a bezel groove is provided on the contact surface between the connecting block 11 and the latch 2. This advantageous feature provides a precise fulcrum for the deformation of the bimetallic strip 22. When the bearing heats up and the free end of the bimetallic strip 22 bends and deforms, its distal end can be directly embedded in the bezel groove, forming a mechanical locking mechanism with a "sheet-slot" abutment. This design converts the thermal expansion stress of the bimetallic strip 22 into a directional compressive force, further reducing the clearance between the connecting block 11 and the connecting groove 12, even achieving an interference fit and significantly improving the overall vibration and impact resistance of the sleeve. Furthermore, the geometric restraint of the bezel groove prevents structural damage caused by excessive deformation of the bimetallic strip 22, ensuring a stable tight fit even under high-temperature conditions. Furthermore, when the temperature drops and the bimetallic strip 22 returns to its original position, the smooth inner wall of the bezel groove reduces frictional resistance, making removal of the latch 2 smoother and achieving a balance between enhanced functionality and operational convenience.

[0019] As a further feature of the present invention, a limiting flange 21 is provided on one end of the latch 2, near the free end of the bimetallic strip 22. This advantageous feature allows the limiting flange 21 at the end of the latch 2 to precisely define the insertion depth of the latch 2 during installation by physically contacting the end face of the sub-sleeve 1. Furthermore, as the bearing heats up and the free end of the bimetallic strip 22 deforms toward the slot, the limiting flange 21 simultaneously provides opposing pressure, creating a bidirectional clamping effect: the flange pushes forward and the bimetallic strip 22 pushes back. This bidirectional action not only offsets the axial travel load generated by high-speed motor operation but also improves the torsional stiffness of the sleeve through balanced stress distribution.

[0020] As a further feature of the present invention, the contact surfaces of the two sub-housings 1 are roughened. This advantageously provides the following benefits: The roughening of the contact surfaces of the sub-housings 1 increases the surface friction coefficient, creating a basic stabilizing layer. When the latch 2 is inserted and tightened, the roughened surface further synergizes with the squeezing force of the bimetallic strip 22, converting single-point force into surface contact stress distribution, effectively suppressing fretting wear between the contact surfaces.

[0021] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An insulating bearing for a new energy motor, comprising an outer ring and an inner ring, with rollers rolling between the outer ring and the inner ring, characterized in that: The cam is secured to the inner wall of the two guide rails and has a camming mechanism which allows the guide rail to move along the longitudinal axis of the two guide rails, the guide rails being secured to the outer wall of the two guide rails and being adapted to move relative to the guide rails of the other guide rail.

2. The insulating bearing for a new energy motor according to claim 1, characterized in that: A bezel groove is provided on the contact surface between the connecting block and the latch.

3. The insulating bearing for a new energy motor according to claim 2, characterized in that: A limiting flange is provided on one end of the latch close to the free end of the bimetallic strip.

4. The insulating bearing for a new energy motor according to claim 1, characterized in that: The contact surfaces of the two sub-housing bodies are roughened.

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