Cooling and lubricating structure of electric spindle and electric spindle

Abstract

The utility model provides a kind of electric main shaft cooling lubrication structure and electric main shaft, it is related to electric main shaft cooling lubrication structure technical field, solve the technical problem that the existing technology exists, every group bearing needs to set up separate oil circuit to cool, oil circuit structure is complex and can lead to the technical problem of electric main shaft damage.This electric main shaft cooling lubrication structure includes oil inlet passage;At least two groups of conducting loop, each group of conducting loop includes at least two oil distribution passages, at least two oil distribution passages are sequentially arranged along oil inlet passage;And one end of each oil distribution passage is communicated with oil inlet passage, the other end of each oil distribution passage is communicated bearing mounting cavity, at least two oil distribution passages can form the loop of relative conduction between oil inlet passage and bearing mounting cavity;Oil outlet passage, oil outlet passage is communicated with bearing mounting cavity;And / or, oil outlet passage is communicated with oil inlet passage.The utility model is used to provide a kind of electric main shaft cooling lubrication structure and electric main shaft for improving oil gas lubrication efficiency, prolonging electric main shaft service life.

Description

Technical Field

[0001] This utility model relates to the technical field of electric spindle cooling and lubrication structure, and in particular to an electric spindle cooling and lubrication structure and an electric spindle. Background Technology

[0002] Metal processing is generally carried out using machining equipment such as lathes, milling machines, and drills. These machines are equipped with electric spindles as the power source for cutting. To ensure the reliability of power output at high speeds, the bearings inside the electric spindle need to be lubricated with grease to reduce friction and dissipate heat. However, under prolonged high-speed rotation, the grease inside the bearings gradually heats up, melts, and burns, eventually causing the bearings to fail due to excessive friction and overheating. Therefore, it is necessary to improve the lubrication capacity of the bearings to meet the demands of high-speed machining.

[0003] Meanwhile, in electric spindle applications, under typical operating conditions, if contaminants such as cutting fluid, slag, or debris enter the spindle, it can cause corrosion and wear, leading to permanent spindle damage. Therefore, the seal should provide maximum protection for the spindle with minimal friction and wear. Since the effectiveness and cleanliness of the lubricant inside the electric spindle significantly affect the performance and lifespan of the bearings, sealing is a crucial factor. External contaminants greatly impact the bearing performance and transmission accuracy inside the electric spindle. With recent developments, the structure for isolating external contaminants in electric spindles can be divided into two types: non-contact seals and contact seals. Contact seals typically have a metal skeleton or shell, with synthetic rubber as the main body, using a clamping spring to press the sealing lip onto the shaft. For high-speed spindles, this results in high frictional temperatures and easy lubricant failure. Non-contact seals mostly use multi-stage labyrinth seals, but their manufacturing cost is also higher.

[0004] Bearings are the core components of electric spindles, transmitting torque to the rotating shaft. In most electric spindle failures, over 85% are due to bearing damage. The main factors affecting bearing life are bearing preload and internal cleaning. Cutting fluid or other impurities entering the bearing can cause uneven bearing rotation, reducing its lifespan and ultimately leading to electric spindle failure.

[0005] The prior art discloses a bearing lubrication structure that lubricates the bearing by spraying lubricating oil onto it. This method provides high uniformity of lubrication and can also cool the bearing. However, since each bearing requires a separate oil circuit for cooling, the electric spindle has too many oil inlets, which can easily lead to other impurities entering the bearing and causing damage to the electric spindle. Utility Model Content

[0006] The purpose of this invention is to provide an electric spindle cooling and lubrication structure and an electric spindle, to solve the technical problem in the prior art where each bearing group needs to be cooled by a separate oil circuit, resulting in a complex oil circuit structure that easily leads to damage to the electric spindle. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] The electric spindle cooling and lubrication structure provided by this utility model includes an oil cooling and lubrication assembly, wherein the oil cooling and lubrication assembly includes:

[0009] Oil inlet channel;

[0010] At least two sets of conductive circuits, each set of conductive circuits includes at least two oil distribution channels, the at least two oil distribution channels are arranged sequentially along the oil inlet channel; and one end of each oil distribution channel is connected to the oil inlet channel, the other end of each oil distribution channel is connected to the bearing mounting cavity, and the at least two oil distribution channels enable the oil inlet channel and the bearing mounting cavity to form a conductive circuit;

[0011] An oil outlet channel is connected to the bearing mounting cavity; and / or, the oil outlet channel is connected to the oil inlet channel.

[0012] As an optional implementation, the oil inlet of the oil inlet channel is located at the rear end of the electric spindle, and the oil outlet of the oil outlet channel is located at the front end of the electric spindle.

[0013] As an optional implementation, an air-cooled lubrication assembly is also included, the air-cooled lubrication assembly comprising:

[0014] An air intake passage, wherein the air intake port of the air intake passage and the oil intake port of the oil intake passage are located on the same side;

[0015] At least one air distribution channel, one end of which is connected to the air intake channel, and the other end of which is connected to the bearing mounting cavity.

[0016] As an optional implementation, the air-cooled lubrication assembly further includes at least one first gas passage, which is connected between the oil outlet passage and the air inlet passage.

[0017] As an optional implementation, the air-cooled lubrication assembly further includes at least one second gas passage and at least one third gas passage, one end of the second gas passage being connected to the air intake passage, and the other end of the second gas passage being connected to the motor mounting cavity.

[0018] One end of the third gas passage is connected to the motor mounting cavity, and the other end of the third gas passage is connected to the gas distribution channel. The gas distribution channel is any of the gas distribution channels located on the side of the third gas passage away from the air inlet of the air inlet channel.

[0019] As an optional implementation, the gas-cooled lubrication assembly further includes at least one fourth gas passage connected to an air outlet.

[0020] An electric spindle includes the electric spindle cooling and lubrication structure described above.

[0021] As an optional implementation, it includes a body, a shaft core, a pair of bearing structures, a pair of support sleeve structures, and a pair of end cap structures.

[0022] The bearing structures are arranged in pairs and spaced apart, and are installed on the shaft core; the support sleeve structure is interference-fitted with the bearing structure, and the paired support sleeve structures are respectively connected to both ends of the machine body;

[0023] The end cap structure is connected to the support sleeve structure, a motor mounting cavity is formed between two adjacent support sleeve structures, and a bearing mounting cavity is formed between adjacent support sleeve structures and the end cap structure.

[0024] As an optional implementation, the bearing structure includes two bearing bodies and a spacer assembly disposed between the two bearing bodies. The spacer assembly includes an inner spacer and an outer spacer, and a flow channel is provided between the inner spacer and the outer spacer.

[0025] As an optional implementation, the outer spacer ring is provided with flared grooves on both sides, and the size of the flared grooves is larger than the size of the flow channel.

[0026] As an optional implementation, the end cap structure includes a pressure cap, an intermediate end cap, a rotating locking nut, and a locking ring, wherein the intermediate end cap is connected to the support sleeve structure, and the end cap is connected to the intermediate end cap;

[0027] Both the locking ring and the rotating body locking nut are threadedly connected to the shaft core, and the locking ring is disposed between the intermediate end cover and the bearing structure, with the inner end face of the locking ring abutting against the bearing structure;

[0028] The rotating body locking nut is disposed between the intermediate end cap and the pressure cap, and an air ring structure is provided between the rotating body locking nut, the intermediate end cap and the pressure cap.

[0029] As an optional implementation, the rotating body locking nut is provided with a first oil outlet hole and a first annular groove. The first oil outlet hole is arranged along the axial direction of the rotating body locking nut, and the first annular groove is arranged along the circumferential direction of the rotating body locking nut. The first oil outlet hole and the first annular groove are connected.

[0030] As an optional implementation, the pressure cap is provided with a second oil outlet and a second annular groove. The second oil outlet is arranged along the axial direction of the pressure cap, and the second annular groove is arranged on the inner wall of the pressure cap. The second oil outlet and the second annular groove are connected and are stepped, and the second annular groove is connected to the first oil outlet.

[0031] As an optional implementation, the locking ring is provided with a third oil outlet hole, which connects the first annular groove and the bearing mounting cavity.

[0032] As an optional implementation, the locking ring and the rotating locking nut have opposite thread directions.

[0033] The beneficial effects of this utility model are as follows: The electric spindle cooling and lubrication structure and electric spindle provided by this utility model include an oil cooling and lubrication assembly: the oil cooling and lubrication assembly includes an oil inlet channel, at least two sets of conductive circuits, and an oil outlet channel; each set of conductive circuits includes at least two oil distribution channels, and the at least two oil distribution channels are arranged sequentially along the oil inlet channel; and one end of each oil distribution channel is connected to the oil inlet channel, and the other end of each oil distribution channel is connected to the bearing mounting cavity, and the at least two oil distribution channels can form a conductive circuit between the oil inlet channel and the bearing mounting cavity, and the oil outlet channel is connected to the bearing mounting cavity; and / or, the oil outlet channel is connected to the bearing mounting cavity. The oil inlet channels are interconnected, thereby guiding the lubricating oil to the bearing mounting cavity for cooling and lubrication under the action of at least two oil distribution channels. The lubricating oil can also flow back to the oil inlet channel through the oil distribution channels and continue to move towards the oil outlet channel to be discharged. When the bearing structure is provided with two sets, by setting at least two sets of conductive circuits, the lubricating oil in the oil inlet channel can be guided to the two bearing mounting cavities respectively, thereby cooling and lubricating the bearings in the two bearing mounting cavities. Afterwards, the lubricating oil flows to the oil outlet channel for discharge, which greatly reduces the area occupied by the oil circuit, effectively reduces the probability of damage to the electric spindle, improves the oil-air lubrication efficiency, and extends the service life of the electric spindle. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram (I) of the oil cooling and lubrication structure of this utility model;

[0036] Figure 2 This is a schematic diagram (II) of the oil cooling and lubrication structure of this utility model;

[0037] Figure 3 This is a schematic diagram (I) of the air-cooled lubrication structure of this utility model;

[0038] Figure 4 This is a schematic diagram (II) of the air-cooled lubrication structure of this utility model;

[0039] Figure 5 This is a partial structural diagram of the present invention (A).

[0040] Figure 6 This is a partial structural diagram of the present invention (B).

[0041] Figure 7 This is a schematic diagram of the spacer ring assembly structure of this utility model;

[0042] Figure 8 This is a cross-sectional view of the spacer ring assembly of this utility model;

[0043] Figure 9 This is a schematic diagram of the mating structure of the rotating locking nut of this utility model;

[0044] Figure 10 This is a perspective view of the rotating locking nut of this utility model.

[0045] In the picture:

[0046] 100. Electric spindle; 200. Electric spindle cooling and lubrication structure;

[0047] 110. Body; 120. Shaft core; 130. Bearing structure; 140. Support sleeve structure; 150. End cover structure; 160. Bearing mounting cavity; 170. Motor mounting cavity;

[0048] 131. Bearing body; 132. Spacer assembly; 1321. Inner spacer; 1322. Outer spacer; 1323. Flared groove; 1324. Flow channel;

[0049] 151. Pressure cap; 152. Intermediate end cap; 153. Rotating body locking nut; 154. Locking ring; 155. Air ring structure;

[0050] 1531, First oil outlet; 1532, First annular groove; 1511, Second oil outlet; 1512, Second annular groove; 1541, Third oil outlet;

[0051] 210. Oil inlet channel; 211. Conductive circuit; 212. Oil outlet channel;

[0052] 220. Intake passage; 221. Gas distribution passage; 222. First gas passage; 223. Second gas passage; 224. Third gas passage; 225. Fourth gas passage; 230. Outlet;

[0053] 2111, Oil distribution channel. Detailed Implementation

[0054] Please refer to the attached diagram below. Figures 1-10 This document explains the content of this utility model and its differences from existing technologies. The technical solutions (including preferred solutions) of this utility model are further described in detail below through accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of a variety of optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of this utility model, nor is it convenient to emphasize that each implementation of a technical feature is one of multiple optional implementations. Therefore, those skilled in the art should understand that any technical means provided by this utility model can be replaced, or any two or more technical means or features provided by this utility model can be combined to obtain a new technical solution. No technical feature or solution in this embodiment limits the scope of protection of this utility model. The scope of protection of this utility model should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by this utility model.

[0055] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] This invention provides an electric spindle cooling and lubrication structure and an electric spindle that improves oil-air lubrication efficiency and extends the service life of the electric spindle.

[0058] The following is combined with Figures 1-10 The technical solution provided by this utility model will be described in more detail.

[0059] This utility model provides an electric spindle cooling and lubrication structure 200, including an oil cooling and lubrication assembly: the oil cooling and lubrication assembly includes:

[0060] Oil inlet channel 210;

[0061] At least two sets of conductive circuits 211 are provided, each set of conductive circuits 211 including at least two oil distribution channels 2111, the at least two oil distribution channels 2111 being arranged sequentially along the oil inlet channel 210; and one end of each oil distribution channel 2111 being connected to the oil inlet channel 210, the other end of each oil distribution channel 2111 being connected to the bearing mounting cavity 160, the at least two oil distribution channels 2111 enabling a conductive circuit to be formed between the oil inlet channel 210 and the bearing mounting cavity 160;

[0062] An oil outlet channel is connected to the bearing mounting cavity 160; and / or, the oil outlet channel is connected to the oil inlet channel 210.

[0063] The electric spindle cooling and lubrication structure 200 provided by this utility model includes an oil cooling and lubrication assembly: the oil cooling and lubrication assembly includes an oil inlet channel 210, at least two sets of conductive circuits 211, and an oil outlet channel; each set of conductive circuits 211 includes at least two oil distribution channels 2111, the at least two oil distribution channels 2111 being arranged sequentially along the oil inlet channel 210; and one end of each oil distribution channel 2111 is connected to the oil inlet channel 210, the other end of each oil distribution channel 2111 is connected to the bearing mounting cavity 160, the at least two oil distribution channels 2111 can form a conductive circuit between the oil inlet channel 210 and the bearing mounting cavity 160, and the oil outlet channel is connected to the bearing mounting cavity 160; and / or, the oil outlet channel is connected to the bearing mounting cavity 160. The oil outlet channel is connected to the oil inlet channel 210, thereby guiding the lubricating oil to the bearing mounting cavity 160 for cooling and lubrication under the action of at least two oil distribution channels 2111. The lubricating oil can also flow back to the oil inlet channel 210 through the oil distribution channel 2111 and continue to move towards the oil outlet channel to be discharged. When the bearing structure 130 is provided with two sets, by providing at least two sets of conductive circuits 211, the lubricating oil in the oil inlet channel 210 can be guided to the two bearing mounting cavities 160 respectively, thereby cooling and lubricating the bearings in the two bearing mounting cavities 160. After that, the lubricating oil flows to the oil outlet channel for discharge, which greatly reduces the area occupied by the oil circuit and can effectively reduce the probability of damage to the electric spindle 100.

[0064] It can be understood that the oil outlet channel is connected to the bearing mounting cavity 160; and / or, the oil outlet channel is connected to the oil inlet channel 210. The function of the oil outlet channel is to discharge the lubricating oil through the oil inlet channel 210 and through the bearing mounting cavity 160 into the electric spindle 100. Therefore, the oil outlet channel can be connected to the bearing mounting cavity 160, or it can be directly connected to the oil inlet channel 210 to complete the discharge of lubricating oil and ensure the cooling and lubrication effect of the electric spindle 100.

[0065] In some embodiments of this utility model, the oil inlet of the oil inlet channel 210 is located at the rear end of the electric spindle 100, and the oil outlet of the oil outlet channel is located at the front end of the electric spindle 100.

[0066] In some of the embodiments of this utility model described above, the oil outlet of the oil inlet channel 210 is located at the front end of the electric spindle 100. After the lubricating oil is discharged, it can cool the grinding tool and the workpiece, thereby improving the processing effect of the grinding tool and the workpiece.

[0067] In some embodiments of this utility model, an air-cooled lubrication assembly is further included, the air-cooled lubrication assembly comprising:

[0068] The air intake passage 220 has its air inlet on the same side as the oil inlet of the oil intake passage 210.

[0069] At least one air distribution channel 221, one end of which is connected to the air intake channel 220, and the other end of which is connected to the bearing mounting cavity 160.

[0070] In some embodiments of the present invention described above, the electric spindle cooling and lubrication structure 200 further includes a gas cooling and lubrication assembly. The gas cooling and lubrication assembly includes an air inlet channel 220 and at least one air distribution channel 221. The air inlet of the air inlet channel 220 is located on the same side as the oil inlet of the oil inlet channel 210. One end of the air distribution channel 221 is connected to the air inlet channel 220, and the other end of the air distribution channel 221 is connected to the bearing mounting cavity 160. The gas entering from the air inlet channel 220 can enter the bearing mounting cavity 160 through at least one air distribution channel 221, thereby carrying away the heat in the bearing mounting cavity 160 and cooling the bearing in the bearing mounting cavity 160. At the same time, the gas can accelerate the flow of lubricating oil, and the oil and gas simultaneously cool and lubricate the bearing, ensuring that the bearing has a better cooling and lubrication effect.

[0071] It is understood that one end of the gas distribution channel 221 is connected to the air intake channel 220, and the other end of the gas distribution channel 221 is connected to the bearing mounting cavity 160. After the gas from the air intake channel 220 enters the bearing mounting cavity 160 through the gas distribution channel 221, it enters the oil inlet channel 210 or the oil outlet channel along with the lubricating oil and is discharged.

[0072] In some embodiments of the present invention, the air-cooled lubrication assembly further includes at least one first gas passage 222, which is connected between the oil outlet passage and the air inlet passage 220.

[0073] In some embodiments of the present invention described above, at least one first gas passage 222 is provided. The first gas passage 222 is connected between the oil outlet passage and the air inlet passage 220. The gas in the air inlet passage 220 accelerates the flow of lubricating oil in the oil outlet passage, thereby effectively increasing the oil outlet speed in the oil outlet passage and preventing the lubricating oil from flowing slowly and accumulating.

[0074] In some embodiments of the present invention, the air cooling lubrication assembly further includes at least one second gas passage 223 and at least one third gas passage 224, one end of the second gas passage 223 is connected to the air intake passage 220, and the other end of the second gas passage 223 is connected to the motor mounting cavity 170.

[0075] One end of the third gas passage 224 is connected to the motor mounting cavity 170, and the other end of the third gas passage 224 is connected to the gas distribution channel 221. The gas distribution channel 221 is any one of the gas distribution channels 221 located on the side of the third gas passage 224 away from the air inlet of the air inlet channel 220.

[0076] In some of the embodiments of the present invention described above, the second gas passage 223 can guide gas to the motor mounting cavity 170, and the third gas passage 224 can exhaust gas from the motor mounting cavity 170, thereby achieving cooling of the motor assembly in the motor mounting cavity 170 and improving the working performance of the electric spindle 100.

[0077] In some embodiments of the present invention, the gas-cooled lubrication assembly further includes at least a fourth gas passage 225, which is connected to an outlet 230.

[0078] In some of the embodiments of the present invention described above, the fourth gas is used to guide the gas through the inside of the electric spindle 100 to the outlet 230, thereby achieving cooling of the electric spindle 100 through the gas flowing inside the electric spindle 100, thereby improving the cooling effect and improving the working performance of the electric spindle 100.

[0079] This utility model also provides an electric spindle 100, including the electric spindle cooling and lubrication structure 200 as described above.

[0080] The electric spindle 100 provided by this utility model includes the electric spindle cooling and lubrication structure 200 as described above. It also has the function of cooling and lubricating the bearings in the two bearing mounting cavities 160, and then the lubricating oil flows to the oil outlet channel and is discharged, which greatly reduces the area occupied by the oil circuit and can effectively reduce the probability of damage to the electric spindle 100.

[0081] In some embodiments of this utility model, the components include a body 110, a shaft core 120, a pair of bearing structures 130, a pair of support sleeve structures 140, and a pair of end cap structures 150.

[0082] The bearing structures 130 are arranged in pairs and spaced apart, and are installed on the shaft core 120; the support sleeve structure 140 is interference-fitted with the bearing structure 130, and the pair of support sleeve structures 140 are respectively connected to both ends of the body 110.

[0083] The end cap structure 150 is connected to the support sleeve structure 140, a motor mounting cavity 170 is formed between two adjacent support sleeve structures 140, and a bearing mounting cavity 160 is formed between adjacent support sleeve structures 140 and the end cap structure 150.

[0084] In some embodiments of the present invention described above, the electric spindle 100 includes a body 110, a spindle core 120, paired bearing structures 130, paired support sleeve structures 140, and paired end cap structures 150. The paired bearing structures 130 are spaced apart and mounted on the spindle core 120. The support sleeve structures 140 are interference-fitted with the bearing structures 130. The paired support sleeve structures 140 are respectively connected to both ends of the body 110, thereby allowing the spindle core 120 to rotatably mount inside the body 110. The end cap structures 150... Connected to the support sleeve structure 140, a motor mounting cavity 170 is formed between two adjacent support sleeve structures 140, and a motor assembly is disposed in the motor mounting cavity 170. A bearing mounting cavity 160 is formed between adjacent support sleeve structures 140 and the end cover structure 150, and a bearing structure 130 is disposed in the bearing mounting cavity 160, thereby separating the bearing structure 130 and the motor assembly to ensure that the electric spindle cooling and lubrication structure 200 can provide better cooling and lubrication for the bearing structure 130 and better cooling for the motor assembly.

[0085] It is understood that the oil inlet channel 210 can be formed on the end cover structure 150, the support sleeve structure 140, and the body 110 to ensure that the oil inlet channel 210 can better and faster deliver lubricating oil to the bearing mounting cavity 160, ensuring the cooling and lubrication effect; the air inlet channel 220 is formed on the end cover structure 150, the support sleeve structure 140, and the body 110 to ensure that the air channel can better and faster deliver gas to the bearing mounting cavity 160, ensuring the cooling and lubrication effect; and can deliver gas to the motor mounting cavity 170 to ensure the cooling effect of the motor assembly.

[0086] Similarly, the oil distribution channel 2111 is provided on the support sleeve structure 140.

[0087] It should be noted that the oil distribution channel 2111 can be a straight pipeline structure, or an L-shaped or cross-shaped pipeline structure, and a plug is provided at the outlet of the pipeline structure where no flow is required.

[0088] It should be noted that, in some embodiments, a sleeve is also provided between the support sleeve structure 140 and the shaft core 120.

[0089] Optionally, the oil distribution channel 2111 is disposed on the support sleeve structure 140 and the sleeve.

[0090] In some embodiments of the present invention, the bearing structure 130 includes two bearing bodies 131 and a spacer assembly 132 disposed between the two bearing bodies 131. The spacer assembly 132 includes an inner spacer 1321 and an outer spacer 1322, and a flow channel 1324 is provided between the inner spacer 1321 and the outer spacer 1322.

[0091] In some embodiments of the present invention described above, a spacer assembly 132 is provided between two bearing bodies 131. The spacer assembly 132 includes an inner spacer 1321 and an outer spacer 1322. A flow channel 1324 is provided between the inner spacer 1321 and the outer spacer 1322, thereby ensuring that lubricating oil can circulate between the two bearing bodies 131, thus ensuring that both bearing bodies 131 can have a good cooling and lubrication effect.

[0092] It is understood that the inner spacer ring 1321 is interference-fitted with the shaft core 120, and the outer spacer ring 1322 is interference-fitted with the support sleeve structure 140, thereby ensuring that the flow channel 1324 between the inner spacer ring 1321 and the outer spacer ring 1322 can ensure stable flow of lubricating oil.

[0093] In some embodiments of this utility model, the outer spacer ring 1322 is provided with flared grooves 1323 on both sides, and the size of the flared grooves 1323 is larger than the size of the flow channel 1324.

[0094] In some embodiments of the present invention described above, flared grooves 1323 are provided on both sides of the outer spacer ring 1322. The size of the flared grooves 1323 is larger than the size of the flow channel 1324. When lubricating oil flows from the flow channel 1324 to the flared grooves 1323, the size of the flow channel 1324 suddenly increases and the flow rate decreases. Under the action of gas, spray lubrication and cooling can be achieved, thereby increasing the oil-gas contact area of ​​the bearing balls and achieving higher lubrication efficiency.

[0095] Specifically, the flared groove 1323 is coaxially arranged with the flow channel 1324.

[0096] In some embodiments of this utility model, the end cap structure 150 includes a pressure cap 151, an intermediate end cap 152, a rotating locking nut 153, and a locking ring 154. The intermediate end cap 152 is connected to the support sleeve structure 140, and the end cap is connected to the intermediate end cap 152.

[0097] The locking ring 154 and the rotating body locking nut 153 are both threadedly connected to the shaft core 120, and the locking ring 154 is disposed between the intermediate end cover 152 and the bearing structure 130, with the inner end face of the locking ring 154 abutting against the bearing structure 130.

[0098] The rotating body locking nut 153 is disposed between the intermediate end cap 152 and the pressure cap 151, and an air ring structure 155 is disposed between the rotating body locking nut 153, the intermediate end cap 152 and the pressure cap 151.

[0099] In some embodiments of the present invention described above, the end cap structure 150 includes a pressure cap 151, an intermediate end cap 152, a rotating locking nut 153, and a locking ring 154. The locking ring 154 and the rotating locking nut 153 are both threadedly connected to the shaft core 120. The locking ring 154 is disposed between the intermediate end cap 152 and the bearing structure 130. The inner end face of the locking ring 154 abuts against the bearing structure 130, thereby enabling a certain degree of pre-tightening and anti-loosening of the bearing. The rotating body locking nut 153 is disposed between the intermediate end cover 152 and the pressure cover 151. An air ring structure 155 is disposed between the rotating body locking nut 153, the intermediate end cover 152 and the pressure cover 151. The air ring structure 155 can form an air curtain. When compressed air flows into the outwardly biased groove of the air ring structure 155, the gas volume suddenly increases, forming a very strong vortex. The speed decreases and the pressure increases. At this time, the internal air pressure is higher than the external air pressure, forming an air curtain, which effectively prevents external air and impurities from being sucked into the spindle. It can also increase the tortuosity of the flow channel, carry away heat as much as possible, and improve the sealing performance of the electric spindle 100.

[0100] It is understood that the first gas passage 222 is located on the middle end cover 152 at the front end of the electric spindle 100. One end of the first gas passage 222 is connected to the air inlet passage 220, and the other end of the first gas passage 222 enters the oil outlet passage through the gas ring structure 155 and the rotating body locking nut 153.

[0101] In some embodiments of this utility model, the rotating body locking nut 153 is provided with a first oil outlet 1531 and a first annular groove 1532. The first oil outlet 1531 is arranged along the axial direction of the rotating body locking nut 153, and the first annular groove 1532 is arranged along the circumferential direction of the rotating body locking nut 153. The first oil outlet 1531 and the first annular groove 1532 are connected.

[0102] In some embodiments of the present invention described above, the rotating body locking nut 153 is provided with a first oil outlet 1531 and a first annular groove 1532. The first oil outlet 1531 and the first annular groove 1532 are connected, allowing oil and gas to circulate on both sides of the rotating body locking nut 153. This allows oil and gas to be guided to the rotating body locking nut 153, completing the discharge of lubricating oil and gas. It also removes heat from the rotating body locking nut 153, thus better cooling and lubricating the electric spindle 100.

[0103] It should be noted that the first oil outlet 1531 and the first annular groove 1532 are connected on the rotating body locking nut 153 at the front end of the electric spindle 100, which can guide oil and gas to the rotating body locking nut 153 to complete the discharge of lubricating oil.

[0104] In some embodiments of this utility model, the pressure cap 151 is provided with a second oil outlet 1511 and a second annular groove 1512. The second oil outlet 1511 is arranged axially along the pressure cap 151, and the second annular groove 1512 is arranged on the inner wall of the pressure cap 151. The second oil outlet 1511 and the second annular groove 1512 are connected and are stepped, and the second annular groove 1512 is connected to the first oil outlet 1531.

[0105] In some embodiments of the present invention described above, a second annular groove 1512 is provided on the inner wall of the pressure cap 151, and a second oil outlet 1511 is provided in the axial direction of the pressure cap 151. The second oil outlet 1511 and the second annular groove 1512 are connected and are stepped, and the second annular groove 1512 is connected to the first oil outlet 1531. This ensures that the lubricating oil can be discharged from the second oil outlet 1511 through the second annular groove 1512 to the front end of the electric spindle 100, achieving a good cooling and lubrication effect for the electric spindle 100 while preventing the lubricating oil from flowing back.

[0106] It is understandable that the second oil outlet 1511 can also be configured as a stepped structure with multiple bends to further ensure the anti-backflow effect of lubricating oil.

[0107] In some embodiments of this utility model, the locking ring 154 is provided with a third oil outlet hole 1541, which connects the first annular groove 1532 and the bearing mounting cavity 160.

[0108] In some of the embodiments of the present invention described above, by providing the third oil outlet 1541, the oil and gas in the bearing mounting cavity 160 at the front end of the electric spindle 100 can be discharged to the front end of the electric spindle 100 via the first oil outlet 1531, the first annular groove 1532, the second oil outlet 1511, and the second annular groove 1512.

[0109] In some embodiments, by providing the third oil outlet 1541, the gas in the fourth gas passage 225 at the rear end of the electric spindle 100 can be guided to the bearing mounting cavity 160, thereby delivering gas to the bearing structure 130 and further improving the cooling effect of the electric spindle 100.

[0110] Example 1:

[0111] The electric spindle 100 provided by this utility model includes a body 110, a spindle core 120, a pair of bearing structures 130, a pair of support sleeve structures 140, and a pair of end cap structures 150.

[0112] The bearing structures 130 are arranged in pairs and spaced apart, and are installed on the shaft core 120; the support sleeve structure 140 is interference-fitted with the bearing structure 130, and the pair of support sleeve structures 140 are respectively connected to both ends of the body 110.

[0113] The end cap structure 150 is connected to the support sleeve structure 140, a motor mounting cavity 170 is formed between two adjacent support sleeve structures 140, and a bearing mounting cavity 160 is formed between adjacent support sleeve structures 140 and the end cap structure 150.

[0114] Furthermore, the end cap structure 150 includes a pressure cap 151, an intermediate end cap 152, a rotating locking nut 153, and a locking ring 154. The intermediate end cap 152 is connected to the support sleeve structure 140, and the end cap is connected to the intermediate end cap 152.

[0115] The locking ring 154 and the rotating body locking nut 153 are both threadedly connected to the shaft core 120, and the locking ring 154 is disposed between the intermediate end cover 152 and the bearing structure 130, with the inner end face of the locking ring 154 abutting against the bearing structure 130.

[0116] The rotating body locking nut 153 is disposed between the intermediate end cap 152 and the pressure cap 151, and an air ring structure 155 is disposed between the rotating body locking nut 153, the intermediate end cap 152 and the pressure cap 151.

[0117] Preferably, the locking ring 154 and the rotating body locking nut 153 have opposite thread directions, so that they will be interlocked no matter how the electric spindle 100 rotates.

[0118] Specifically, the bearing structure 130 includes two bearing bodies 131 and a spacer assembly 132 disposed between the two bearing bodies 131. The spacer assembly 132 includes an inner spacer 1321 and an outer spacer 1322, and a flow channel 1324 is provided between the inner spacer 1321 and the outer spacer 1322.

[0119] More specifically, the two bearing bodies 131 are a rolling bearing and a thrust bearing, respectively.

[0120] Furthermore, the electric spindle 100 is provided with an oil inlet channel 210 and two sets of conductive circuits 211. The oil inlet of the oil inlet channel 210 is located at the rear end of the electric spindle 100, and the oil outlet of the oil outlet channel is located at the front end of the electric spindle 100, and a plug is provided on the oil outlet.

[0121] Each set of the conductive circuits 211 includes two oil distribution channels 2111, which are arranged sequentially along the oil inlet channel 210. One end of each oil distribution channel 2111 is connected to the oil inlet channel 210, and the other end of each oil distribution channel 2111 is connected to the bearing mounting cavity 160. The two oil distribution channels 2111 enable the oil inlet channel 210 and the bearing mounting cavity 160 to form a conductive circuit.

[0122] The rotating body locking nut 153 at the front end of the electric spindle 100 is provided with a first oil outlet 1531 and a first annular groove 1532. The first oil outlet 1531 is arranged axially along the rotating body locking nut 153, and the first annular groove 1532 is arranged circumferentially along the rotating body locking nut 153. The first oil outlet 1531 and the first annular groove 1532 are connected.

[0123] The pressure cap 151 at the front end of the electric spindle 100 is provided with a second oil outlet 1511 and a second annular groove 1512. The second oil outlet 1511 is arranged axially along the pressure cap 151, and the second annular groove 1512 is arranged on the inner wall of the pressure cap 151. The second oil outlet 1511 and the second annular groove 1512 are connected and are stepped, and the second annular groove 1512 is connected to the first oil outlet 1531.

[0124] The locking ring 154 at the front end of the electric spindle 100 is provided with a third oil outlet hole 1541, which connects the first annular groove 1532 and the bearing mounting cavity 160.

[0125] This allows the second oil outlet 1511, the second annular groove 1512, the first oil outlet 1531, the first annular groove 1532, and the third oil outlet 1541 to form an oil outlet channel.

[0126] The lubricating oil cooling and lubrication path in the electric spindle 100 provided by this utility model is as follows: the lubricating oil enters from the oil inlet of the oil inlet channel 210, travels along the oil inlet channel 210, and after completing the cooling and lubrication of the first set of bearing structures 130 through the first set of conductive circuits 211, the lubricating oil flows back to the oil inlet channel 210, and after completing the cooling and lubrication of the second set of bearing structures 130 through the second set of conductive circuits 211, it is discharged through the oil outlet channel. Thus, the lubricating oil completes the cooling and lubrication of the two sets of bearing structures 130, and can carry away the heat in the spindle during the flow of the lubricating oil, effectively achieving spindle cooling and improving the cooling effect.

[0127] Furthermore, the electric spindle 100 is also provided with an air intake channel 220, the inlet of the air intake channel 220 and the oil inlet of the oil intake channel 210 are located on the same side, the outlet of the air intake channel 220 is located at the front end of the electric spindle 100, and a plug is provided on the air outlet 230.

[0128] Two gas distribution channels 221 are provided, one end of which is connected to the air intake channel 220, and the other end of which is connected to the bearing mounting cavity 160.

[0129] The gas in the intake passage 220 can flow to the bearing mounting cavity 160 through the two-part gas flow passage 221, thereby cooling the bearing mounting cavity 160. After merging with the lubricating oil, the oil and gas are discharged through the oil inlet passage 210 and the oil outlet passage, improving the cooling effect of the lubricating oil.

[0130] Furthermore, it also includes a first gas passage 222, a second gas passage 223, a third gas passage 224 and a fourth gas passage 225. The first gas passage 222 is connected between the oil outlet passage and the air inlet passage 220. One end of the second gas passage 223 is connected to the air inlet passage 220, and the other end of the second gas passage 223 is connected to the motor mounting cavity 170.

[0131] One end of the third gas passage 224 is connected to the motor mounting cavity 170, and the other end of the third gas passage 224 is connected to the gas distribution channel 221. The gas distribution channel 221 is any one of the gas distribution channels 221 located on the side of the third gas passage 224 away from the inlet of the air inlet channel 220. The fourth gas passage 225 is connected to the air outlet 230, and the air outlet 230 is located on the pressure cover 151 at the rear end of the electric spindle 100.

[0132] The gas cooling and lubrication path within the electric spindle 100 provided by this utility model is as follows: Gas enters through the inlet channel 220, and a first portion of the gas exits through the outlet 230 via the fourth gas passage 225; a portion of the gas in the fourth gas passage 225 also enters the bearing mounting cavity 160 through the third oil outlet 1541, completing the cooling of the locking ring 154 and the bearing. A second portion of the gas flows into the bearing mounting cavity 160 via the gas distribution channel 221, and the oil-gas mixture with the lubricating oil flows through the oil inlet channel 210; a third portion of the gas enters the motor mounting cavity 170 via the second gas passage 223 and the third gas passage 224, and then enters the bearing mounting cavity 160 at the front end of the electric spindle 100, where it mixes with the lubricating oil, and the oil-gas mixture exits through the oil outlet channel; a fourth portion of the gas exits through the first gas passage 222, the gas ring structure 155, and the oil outlet channel, thereby ensuring the cooling and lubrication effect of the electric spindle 100, helping to control the temperature rise of the electric spindle 100, and improving the rotational accuracy of the electric spindle 100.

[0133] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0134] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A cooling and lubrication structure for an electric spindle, characterized in that, Includes an oil-cooled lubrication assembly, the oil-cooled lubrication assembly comprising: Oil inlet channel; At least two sets of conductive circuits, each set of conductive circuits includes at least two oil distribution channels, the at least two oil distribution channels are arranged sequentially along the oil inlet channel; and one end of each oil distribution channel is connected to the oil inlet channel, the other end of each oil distribution channel is connected to the bearing mounting cavity, and the at least two oil distribution channels enable the oil inlet channel and the bearing mounting cavity to form a conductive circuit; An oil outlet channel is connected to the bearing mounting cavity; and / or, the oil outlet channel is connected to the oil inlet channel.

2. The electric spindle cooling and lubrication structure according to claim 1, characterized in that, The oil inlet of the oil inlet channel is located at the rear end of the electric spindle, and the oil outlet of the oil outlet channel is located at the front end of the electric spindle.

3. The electric spindle cooling and lubrication structure according to claim 2, characterized in that, It also includes an air-cooled lubrication assembly, which comprises: An air intake passage, wherein the air intake port of the air intake passage and the oil intake port of the oil intake passage are located on the same side; At least one air distribution channel, one end of which is connected to the air intake channel, and the other end of which is connected to the bearing mounting cavity.

4. The electric spindle cooling and lubrication structure according to claim 3, characterized in that, The air-cooled lubrication assembly further includes at least one first gas passage, which is connected between the oil outlet passage and the air inlet passage.

5. The electric spindle cooling and lubrication structure according to claim 3, characterized in that, The air-cooled lubrication assembly further includes at least one second gas passage and at least one third gas passage, one end of the second gas passage is connected to the air intake passage, and the other end of the second gas passage is connected to the motor mounting cavity. One end of the third gas passage is connected to the motor mounting cavity, and the other end of the third gas passage is connected to the gas distribution channel. The gas distribution channel is any of the gas distribution channels located on the side of the third gas passage away from the air inlet of the air inlet channel.

6. The electric spindle cooling and lubrication structure according to claim 3, characterized in that, The gas-cooled lubrication assembly further includes at least one fourth gas passage, which is connected to an air outlet.

7. An electric spindle, characterized in that, Includes the electric spindle cooling and lubrication structure as described in any one of claims 1-6.

8. The electric spindle according to claim 7, characterized in that, It includes the body, shaft core, paired bearing structures, paired support sleeve structures, and paired end cap structures; The bearing structures are arranged in pairs and spaced apart, and are installed on the shaft core; the support sleeve structure is interference-fitted with the bearing structure, and the paired support sleeve structures are respectively connected to both ends of the machine body; The end cap structure is connected to the support sleeve structure, a motor mounting cavity is formed between two adjacent support sleeve structures, and a bearing mounting cavity is formed between adjacent support sleeve structures and the end cap structure.

9. The electric spindle according to claim 8, characterized in that, The bearing structure includes two bearing bodies and a spacer assembly disposed between the two bearing bodies. The spacer assembly includes an inner spacer and an outer spacer, and a flow channel is provided between the inner spacer and the outer spacer.

10. The electric spindle according to claim 9, characterized in that, The outer diaphragm ring has flared grooves on both sides, and the size of the flared grooves is larger than the size of the flow channel.

11. The electric spindle according to claim 8, characterized in that, The end cap structure includes a pressure cap, an intermediate end cap, a rotating locking nut, and a locking ring. The intermediate end cap is connected to the support sleeve structure, and the end cap is connected to the intermediate end cap. Both the locking ring and the rotating body locking nut are threadedly connected to the shaft core, and the locking ring is disposed between the intermediate end cover and the bearing structure, with the inner end face of the locking ring abutting against the bearing structure; The rotating body locking nut is disposed between the intermediate end cap and the pressure cap, and an air ring structure is provided between the rotating body locking nut, the intermediate end cap and the pressure cap.

12. The electric spindle according to claim 11, characterized in that, The rotating body locking nut is provided with a first oil outlet and a first annular groove. The first oil outlet is arranged along the axial direction of the rotating body locking nut, and the first annular groove is arranged along the circumferential direction of the rotating body locking nut. The first oil outlet and the first annular groove are connected.

13. The electric spindle according to claim 12, characterized in that, The pressure cap is provided with a second oil outlet and a second annular groove. The second oil outlet is arranged along the axial direction of the pressure cap, and the second annular groove is arranged on the inner wall of the pressure cap. The second oil outlet and the second annular groove are connected and are stepped, and the second annular groove is connected to the first oil outlet.

14. The electric spindle according to claim 12, characterized in that, The locking ring is provided with a third oil outlet hole, which connects the first annular groove and the bearing mounting cavity.

15. The electric spindle according to claim 11, characterized in that, The locking ring and the rotating locking nut have opposite thread directions.

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