Energy-saving high-torque grinding motor

Abstract

The invention relates to the technical field of motors, in particular to an energy-saving high-torque grinding motor which comprises a grinding motor body, a motor output shaft is fixedly connected to the grinding motor body, an output shaft end cover is arranged on the motor output shaft, and an aluminum alloy shell is fixedly connected to the outer side of the grinding motor body. And a gap between the grinding motor and the aluminum alloy shell is filled with heat-conducting glue, and a quick release mechanism is arranged below the grinding motor. Through the arrangement of the aluminum alloy shell, the heat-conducting glue and the heat dissipation mechanism, the aluminum alloy shell can obviously reduce the overall weight of the motor on the premise of ensuring higher strength and rigidity, all microscopic air gaps between the motor stator and the aluminum alloy shell are completely filled with the heat-conducting glue, traditional point contact or line contact is improved into surface contact, the heat dissipation efficiency is improved, and the service life of the motor is prolonged. And the aluminum alloy shell, the heat-conducting glue and the intelligent heat dissipation mechanism are innovatively combined, so that a three-in-one thermal control effect of a light reinforced shell, a high-efficiency heat-conducting medium and intelligent thermal management is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an energy-saving large-torque polishing motor. BACKGROUND

[0002] In the field of high-end manufacturing and automation, the polishing motor is a core motor that provides power for an automated polishing / polishing workstation or polishing robot. In the metal processing, stone processing, wood polishing and other industries, the polishing motor is a core power equipment, which is usually used with accessories such as grinding wheels and steel wire wheels to realize the whole process processing from rough grinding to mirror polishing.

[0003] Traditional polishing motors use metal casings for natural cooling. When running under high load, the heat generated inside the motor cannot be quickly dissipated, causing the temperature of the winding and permanent magnet to rise sharply, resulting in a decrease in output torque, which seriously affects the continuous working ability and service life of the motor. Moreover, the output shaft bearing of the traditional motor has low sealing performance, and external grinding dust can easily enter the bearing, causing abrasive wear and accelerating bearing damage. Therefore, an energy-saving large-torque polishing motor is proposed. SUMMARY

[0004] The purpose of the present application is to solve the shortcomings in the prior art and provide an energy-saving large-torque polishing motor.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] The polishing motor is fixedly connected with a motor output shaft, the output shaft is provided with an output shaft end cover, the outer side of the polishing motor is fixedly connected with an aluminum alloy shell, and the gap between the polishing motor and the aluminum alloy shell is filled with heat-conducting glue, the aluminum alloy shell is provided with a heat dissipation mechanism for improving the heat dissipation efficiency of the polishing motor, and the lower side of the polishing motor is provided with a quick release mechanism.

[0007] The inner side of the output shaft end cover is provided with a lubricating mechanism, the lubricating mechanism comprises a bearing, an oil storage cavity, an oil lubricating groove, a double-lip oil seal and an inner oil retaining ring, the bearing is rotatably connected to the inside of the output shaft end cover, the oil storage cavity is formed in the inside of the bearing, the oil lubricating groove is opened on the surface of the bearing, the double-lip oil seal is arranged on the inner side of the output shaft end cover and close to one side of the outside of the polishing motor, and the inner oil retaining ring is arranged on the outer side of the bearing and close to one side of the stator and rotor of the polishing motor.

[0008] Preferably, the heat dissipation mechanism comprises a heat dissipation groove, a heat dissipation fan, a temperature sensor and a plurality of heat dissipation ribs.

[0009] The heat dissipation groove is arranged on one side of the aluminum alloy shell, the heat dissipation fan is fixedly installed on the inside of the aluminum alloy shell, the heat dissipation ribs are arranged on the surface of the aluminum alloy shell, and the temperature sensor is fixedly installed on the inner wall of the aluminum alloy shell.

[0010] Preferably, the heat dissipation fan is arranged in alignment with the heat dissipation groove and is used for discharging heat inside the aluminum alloy shell to the outside.

[0011] Preferably, the heat dissipation fan and the temperature sensor are electrically connected with the controller, and the temperature sensor is used for monitoring the temperature of the surface of the polishing motor in real time.

[0012] Preferably, the inner wall of the bearing is attached to the outer wall of the motor output shaft, the oil lubrication groove is in a spiral structure, the inside of the oil storage cavity is filled with high-temperature extreme pressure lithium-based lubricating grease, and the heat dissipation efficiency and uniform lubrication are improved.

[0013] Preferably, the double-lip oil seal comprises a main lip for preventing internal lubricating oil from leaking and a dust lip for preventing external dust and particles from entering.

[0014] Preferably, the quick release mechanism comprises a mounting frame, a through groove, a sliding rod, a fastening nut, a positioning frame, a connecting frame, a slot, two locking keys, two guide grooves and a guide rod.

[0015] The positioning frame is fixedly connected to the bottom of the aluminum alloy shell, the mounting frame is detachably connected with the positioning frame, the slot is formed in the inside of the mounting frame, the through groove is opened in the inside of the slot and penetrates through to the outside of the mounting frame, the sliding rod is slidably connected to the inside of the through groove, the fastening nut is threadedly connected with one end of the sliding rod, the connecting frame is fixedly connected to the other end of the sliding rod, the bottoms of the two locking keys are rotatably connected to the two ends of the connecting frame, the guide grooves are opened on the surface of the locking keys, and the guide rod is fixedly connected to the inside of the slot.

[0016] Preferably, the guide rod and the guide grooves are slidably connected in up-down direction, and the guide grooves are in a V-shaped structure with a large inner angle.

[0017] Preferably, the slot and the positioning frame are in shape adaptation, and are used for pre-connecting the aluminum alloy shell to the top of the mounting frame when clamped.

[0018] Preferably, the positioning frame is in an inverted concave-shaped structure, the inside of the bent part of the positioning frame is provided with a locking slot which is in shape adaptation with the bent part of the locking key, and is used for locking the aluminum alloy shell to the top of the mounting frame when clamped.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. By setting up an aluminum alloy shell, thermally conductive adhesive, and heat dissipation mechanism, the aluminum alloy shell can significantly reduce the overall weight of the motor while ensuring higher strength and rigidity. The thermally conductive adhesive completely fills all the microscopic air gaps between the motor stator and the aluminum alloy shell, upgrading the traditional point contact or line contact to surface contact. The innovative combination of the aluminum alloy shell, thermally conductive adhesive, and intelligent heat dissipation mechanism constitutes a three-in-one thermal control effect of "lightweight and strong shell, efficient thermal medium, and intelligent thermal management".

[0021] 2. By setting up a lubrication mechanism, the bearing is kept in the best lubrication state under any load, with small and stable frictional torque. This ensures that the electromagnetic torque of the motor can be efficiently and losslessly converted into mechanical torque at the output shaft end, avoiding bearing jamming, torque fluctuation or sudden increase in resistance caused by poor lubrication. This allows the motor to continuously and smoothly output rated and overload torque, thereby ensuring that the output shaft bearing receives continuous and uniform lubrication and cooling in a well-sealed environment.

[0022] 3. By setting up a quick-release mechanism, the traditional complex installation process that requires multiple bolts, tools, and multiple alignment steps is simplified to simply aligning, inserting, and tightening a nut. During disassembly, simply loosen the nut and lift vertically, which improves the efficiency of equipment replacement, maintenance, or production line changeover. In addition, all locking components (locking key, slide bar, guide bar) are integrated inside the mounting frame, eliminating independent and easily lost small parts such as pins, retaining rings, and washers. This not only reduces maintenance complexity but also fundamentally eliminates installation failures or equipment hazards caused by missing or lost parts. Attached Figure Description

[0023] Figure 1 This is a front structural diagram of an energy-saving high-torque grinding motor proposed in this invention;

[0024] Figure 2 This is a side view of the structure of an energy-saving high-torque grinding motor proposed in this invention.

[0025] Figure 3 This invention proposes an energy-saving, high-torque grinding motor. Figure 2 A schematic diagram of structure A in the diagram;

[0026] Figure 4 This is a schematic diagram of the heat dissipation mechanism of an energy-saving high-torque grinding motor proposed in this invention;

[0027] Figure 5 This is a cross-sectional view of the mounting bracket for an energy-saving high-torque grinding motor proposed in this invention.

[0028] Figure 6 This is a schematic diagram of the quick-release mechanism of an energy-saving high-torque grinding motor proposed in this invention;

[0029] Figure 7 This is a schematic diagram of the lubrication mechanism of an energy-saving high-torque grinding motor proposed in this invention;

[0030] Figure 8 This is a cross-sectional view of the bearing structure of an energy-saving high-torque grinding motor proposed in this invention.

[0031] In the diagram: 1. Grinding motor; 2. Aluminum alloy housing; 3. Thermal conductive adhesive; 4. Heat dissipation mechanism; 41. Heat dissipation groove; 42. Cooling fan; 43. Heat dissipation fins; 44. Temperature sensor; 5. Motor output shaft; 6. Output shaft end cover; 7. Lubrication mechanism; 71. Bearing; 72. Oil reservoir; 73. Lubricating groove; 74. Double lip oil seal; 741. Main lip; 742. Dustproof lip; 75. Inner oil retaining ring; 8. Quick release mechanism; 81. Mounting bracket; 82. Through groove; 83. Slide rod; 84. Fastening nut; 85. Positioning bracket; 86. Connecting bracket; 87. Locking key; 88. Slot; 89. Guide groove; 810. Guide rod. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0034] Reference Figures 1-8 An energy-saving high-torque grinding motor includes a grinding motor 1, a motor output shaft 5 fixedly connected to the grinding motor 1, an output shaft end cover 6 provided on the motor output shaft 5, an aluminum alloy shell 2 fixedly connected to the outside of the grinding motor 1, and thermally conductive adhesive 3 filling the gap between the grinding motor 1 and the aluminum alloy shell 2, a heat dissipation mechanism 4 for improving the heat dissipation efficiency of the grinding motor 1 provided on the aluminum alloy shell 2, and a quick-release mechanism 8 provided below the grinding motor 1.

[0035] A lubrication mechanism 7 is provided on the inner side of the output shaft end cover 6. The lubrication mechanism 7 includes a bearing 71, an oil storage cavity 72, an oil groove 73, a double-lip oil seal 74, and an inner oil retaining ring 75. The bearing 71 is rotatably connected to the inside of the output shaft end cover 6. The oil storage cavity 72 is formed inside the bearing 71. The oil groove 73 is opened on the surface of the bearing 71. The double-lip oil seal 74 is provided on the inner side of the output shaft end cover 6 and is close to the outside of the grinding motor 1. The inner oil retaining ring 75 is provided on the outer side of the bearing 71 and is close to the stator and rotor of the grinding motor 1.

[0036] The heat dissipation mechanism 4 includes a heat dissipation slot 41, a heat dissipation fan 42, a temperature sensor 44, and multiple heat dissipation fins 43;

[0037] A heat dissipation slot 41 is provided on one side of the aluminum alloy shell 2, a cooling fan 42 is fixedly installed inside the aluminum alloy shell 2, a heat dissipation fin 43 is provided on the surface of the aluminum alloy shell 2, and a temperature sensor 44 is fixedly installed on the inner wall of the aluminum alloy shell 2.

[0038] The quick-release mechanism 8 includes a mounting bracket 81, a through slot 82, a slide bar 83, a fastening nut 84, a positioning bracket 85, a connecting bracket 86, a slot 88, two locking keys 87, two guide slots 89, and a guide rod 810;

[0039] The positioning bracket 85 is fixedly connected to the bottom of the aluminum alloy shell 2. The mounting bracket 81 is detachably connected to the positioning bracket 85. The slot 88 is formed inside the mounting bracket 81. The through groove 82 is opened inside the slot 88 and extends to the outside of the mounting bracket 81. The slide rod 83 is slidably connected to the inside of the through groove 82. The fastening nut 84 is threadedly connected to one end of the slide rod 83. The connecting bracket 86 is fixedly connected to the other end of the slide rod 83. The bottoms of the two locking keys 87 are rotatably connected to the two ends of the connecting bracket 86 respectively. The guide groove 89 is opened on the surface of the locking key 87. The guide rod 810 is fixedly connected to the inside of the slot 88.

[0040] In the embodiment of the above technical solution, the heat generated inside the grinding motor 1 is first conducted to the outer shell of the grinding motor 1 through the stator core. Since the thermally conductive adhesive 3 is filled between the aluminum alloy outer shell 2 and the outer shell of the grinding motor 1, the thermally conductive adhesive 3 completely fills the micro gaps, greatly reducing the contact thermal resistance, so that the heat can be efficiently transferred to the aluminum alloy outer shell 2. The multiple heat dissipation fins 43 on the outer surface of the aluminum alloy outer shell 2 greatly increase the contact area with the air, and the heat is initially dissipated through natural convection. The temperature sensor 44 fixed on the inner wall of the aluminum alloy outer shell 2 monitors the surface temperature of the motor in real time. When the temperature reaches the preset first threshold, such as 60°C, the controller linked with the sensor starts the cooling fan 42. The airflow generated by the cooling fan 42 is guided by the heat dissipation groove 41 to form forced convection, and the heat dissipation efficiency is increased by orders of magnitude.

[0041] The oil reservoir 72 is pre-filled with high-performance high-temperature extreme pressure lithium-based grease. When the motor output shaft 5 drives the inner ring of the bearing 71 to rotate, the grease in the oil reservoir 72 will be driven by centrifugal force and viscous force and flow slowly along the spiral oil groove 73 opened on the surface of the bearing 71. The oil groove 73 helps to guide and store the grease in the early stage of the bearing 71 operation, and promotes the micro-circulation of the grease by stirring during operation to improve lubrication and assist heat dissipation. This allows the grease to be more evenly distributed between the rolling elements and raceways of the bearing 71, providing not only lubrication but also carrying away the heat generated by friction, playing the role of uniform temperature and assisting heat dissipation.

[0042] The double-lip oil seal 74 is key to preventing external contamination and internal leakage. Its dustproof lip 742 is always in close contact with the output shaft, which tightly blocks the dust and debris generated during grinding. The internal main lip 741 prevents the grease from leaking out. The inner oil baffle ring 75, located on the inner side of the bearing 71 near the motor winding, is used to prevent a very small amount of potentially vaporized grease mist from entering the motor, thus avoiding contamination of the winding and affecting the insulation, while also not affecting the air pressure balance inside the bearing 71.

[0043] The grinding motor 1 usually needs to be fixed to the equipment or robotic arm by a frame. The traditional installation method often uses multiple bolts for direct fastening. During installation, the holes need to be aligned and the bolts tightened one by one. Disassembly is also cumbersome. In this case, the positioning bracket 85 at the bottom of the grinding motor 1 is aligned with the slot 88 on the mounting bracket 81 and inserted. At this time, the two horizontal bends of the positioning bracket 85 are located in the slot 88, pushing the slide rod 83 to move downward along the through groove 82. The slide rod 83 drives the two locking keys 87 to move downward synchronously through the connecting bracket 86. When the locking key 87 moves downward, the V-shaped guide groove 89 on it slides along the fixed guide rod 810. Due to the effect of the inclined surface of the V-shaped groove, the top bend of the locking key 87 is forced to generate an inward horizontal radial movement while moving downward. Finally, it is firmly locked into the locking groove inside the bend of the positioning bracket 85, realizing rigid mechanical locking. Tightening the fastening nut 84 can provide additional preload to prevent loosening.

[0044] The preferred technical solution in this embodiment is:

[0045] Reference Figure 4 The cooling fan 42 is aligned with the heat sink 41 and is used to exhaust the heat inside the aluminum alloy shell 2 to the outside. The airflow generated by the cooling fan 42 is guided by the heat sink 41 to form forced convection, and the heat dissipation efficiency is increased by orders of magnitude.

[0046] Reference Figure 4The cooling fan 42 and the temperature sensor 44 are both electrically connected to the controller. The temperature sensor 44 is used to monitor the surface temperature of the grinding motor 1 in real time. When the temperature drops to the second threshold, such as 45°C, the cooling fan 42 automatically stops and enters the energy-saving standby mode. This closed-loop control of "monitoring-feedback-action" achieves the optimal balance between heat dissipation and energy consumption, avoiding the unnecessary energy consumption of the traditional motor cooling fan 42 running continuously.

[0047] Reference Figure 8 The inner wall of the bearing 71 is in contact with the outer wall of the motor output shaft 5. The oil groove 73 has a spiral structure. The oil storage cavity 72 is filled with high temperature extreme pressure lithium-based grease, which plays a role in improving heat dissipation efficiency and uniform lubrication. Due to the action of centrifugal force and viscosity, the grease in the oil storage cavity 72 will be driven and flow slowly along the spiral oil groove 73 opened on the surface of the bearing 71. The spiral groove structure plays a role in pumping and guiding.

[0048] Reference Figure 8 The double-lip oil seal 74 includes a main lip 741 for preventing internal lubricating oil leakage and a dustproof lip 742 for preventing external dust and particles from entering. The main lip 741 prevents grease from leaking outward. An inner oil baffle ring 75 is provided on the inner side of the bearing 71 near the motor winding to prevent a very small amount of potentially vaporized grease mist from entering the motor and to avoid contaminating the winding and affecting insulation.

[0049] Reference Figure 6 The guide rod 810 and the guide groove 89 are slidably connected, and the guide groove 89 has a V-shaped structure with a large inner angle. The slot 88 is adapted to the shape of the positioning frame 85 and is used to pre-connect the aluminum alloy shell 2 to the top of the mounting frame 81 when it is engaged. When disassembly is required, loosen the fastening nut 84, lift the slide rod 83 upward, and the locking key 87 rises accordingly. Under the guidance of the V-shaped guide groove 89 and the guide rod 810, the bent part of the locking key 87 produces an outward horizontal radial movement and disengages from the locking groove of the positioning frame 85. At this time, the mechanical lock between the positioning frame 85 and the mounting frame 81 is released, and the grinding motor 1 can be lifted vertically upward as a whole to complete the disassembly.

[0050] Reference Figure 6 The positioning frame 85 has an inverted U-shaped structure, and the inner side of the bent part of the positioning frame 85 has a locking groove that matches the shape of the bent part of the locking key 87. It is used to lock the aluminum alloy shell 2 to the top of the mounting frame 81 when locked. The two bent parts of the U-shaped positioning frame 85 are the load-bearing core, which are used to lock on the mounting frame 81 and bear gravity and working torque. During installation, these two horizontal bent parts can be directly placed inside the slot 88 of the mounting frame 81 to achieve quick pre-positioning and load-bearing, so that the grinding motor 1 can be stably placed before final locking.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving high-torque grinding motor, comprising a grinding motor (1), wherein a motor output shaft (5) is fixedly connected to the grinding motor (1), and an output shaft end cap (6) is provided on the motor output shaft (5), characterized in that, An aluminum alloy shell (2) is fixedly connected to the outside of the grinding motor (1), and thermal conductive adhesive (3) is filled in the gap between the grinding motor (1) and the aluminum alloy shell (2). A heat dissipation mechanism (4) for improving the heat dissipation efficiency of the grinding motor (1) is provided on the aluminum alloy shell (2), and a quick release mechanism (8) is provided below the grinding motor (1). The output shaft end cover (6) is provided with a lubrication mechanism (7) on its inner side. The lubrication mechanism (7) includes a bearing (71), an oil storage cavity (72), an oil groove (73), a double-lip oil seal (74), and an inner oil retainer ring (75). The bearing (71) is rotatably connected to the inside of the output shaft end cover (6). The oil storage cavity (72) is formed inside the bearing (71). The oil groove (73) is opened on the surface of the bearing (71). The double-lip oil seal (74) is located on the inner side of the output shaft end cover (6) and close to the outside of the grinding motor (1). The inner oil retainer ring (75) is located on the outer side of the bearing (71) and close to the stator and rotor of the grinding motor (1).

2. The energy-saving high-torque grinding motor according to claim 1, characterized in that, The heat dissipation mechanism (4) includes a heat dissipation groove (41), a heat dissipation fan (42), a temperature sensor (44), and multiple heat dissipation fins (43). The heat dissipation groove (41) is disposed on one side of the aluminum alloy shell (2), the heat dissipation fan (42) is fixedly installed inside the aluminum alloy shell (2), the heat dissipation fin (43) is disposed on the surface of the aluminum alloy shell (2), and the temperature sensor (44) is fixedly installed on the inner wall of the aluminum alloy shell (2).

3. The energy-saving high-torque grinding motor according to claim 2, characterized in that, The cooling fan (42) is aligned with the heat sink (41) and is used to exhaust the heat inside the aluminum alloy shell (2) to the outside.

4. The energy-saving high-torque grinding motor according to claim 2, characterized in that, The cooling fan (42) and the temperature sensor (44) are both electrically connected to the controller, and the temperature sensor (44) is used to monitor the surface temperature of the grinding motor (1) in real time.

5. The energy-saving high-torque grinding motor according to claim 1, characterized in that, The inner wall of the bearing (71) is in contact with the outer wall of the motor output shaft (5), the oil groove (73) has a spiral structure, and the oil storage cavity (72) is filled with high temperature extreme pressure lithium-based grease, which plays a role in improving heat dissipation efficiency and uniform lubrication.

6. The energy-saving high-torque grinding motor according to claim 1, characterized in that, The double-lip oil seal (74) includes a main lip (741) for preventing internal lubricant leakage and a dustproof lip (742) for preventing external dust and particles from entering.

7. The energy-saving high-torque grinding motor according to claim 1, characterized in that, The quick-release mechanism (8) includes a mounting bracket (81), a through slot (82), a slide bar (83), a fastening nut (84), a positioning bracket (85), a connecting bracket (86), a slot (88), two locking keys (87), two guide slots (89), and a guide rod (810). The positioning frame (85) is fixedly connected to the bottom of the aluminum alloy shell (2). The mounting frame (81) is detachably connected to the positioning frame (85). The slot (88) is formed inside the mounting frame (81). The through groove (82) is opened inside the slot (88) and extends to the outside of the mounting frame (81). The slide rod (83) is slidably connected to the inside of the through groove (82). The fastening nut (84) is threadedly connected to one end of the slide rod (83). The connecting frame (86) is fixedly connected to the other end of the slide rod (83). The bottoms of the two locking keys (87) are rotatably connected to the two ends of the connecting frame (86). The guide groove (89) is opened on the surface of the locking key (87). The guide rod (810) is fixedly connected to the inside of the slot (88).

8. The energy-saving high-torque grinding motor according to claim 7, characterized in that, The guide rod (810) is slidably connected to the guide groove (89) and the guide groove (89) has a V-shaped structure with a large inner angle.

9. The energy-saving high-torque grinding motor according to claim 7, characterized in that, The slot (88) is adapted to the shape of the positioning bracket (85) and is used to pre-connect the aluminum alloy housing (2) to the top of the mounting bracket (81) when engaged.

10. An energy-saving high-torque grinding motor according to claim 7, characterized in that, The positioning frame (85) has an inverted U-shaped structure, and the inner side of the bent part of the positioning frame (85) is provided with a locking groove that matches the shape of the bent part of the locking key (87), and is used to lock the aluminum alloy shell (2) to the top of the mounting frame (81) when engaged.

Images