CN109707746B - Bearing sealing structure and electric spindle comprising same - Google Patents
Bearing sealing structure and electric spindle comprising same Download PDFInfo
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- CN109707746B CN109707746B CN201811527170.XA CN201811527170A CN109707746B CN 109707746 B CN109707746 B CN 109707746B CN 201811527170 A CN201811527170 A CN 201811527170A CN 109707746 B CN109707746 B CN 109707746B
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Abstract
The invention discloses a bearing sealing structure and an electric spindle with the same, and belongs to the field of processing machine tool equipment. The bearing sealing structure comprises a lower cover, a locking piece and a protective cover; the locking piece is connected with the protective cover to form a rotating assembly, and a gap channel is formed between the lower cover and the rotating assembly; the lower cover is provided with a plurality of inclined channels, the inclined channels extend towards the side close to the second side surface, the side of the inclined channels close to the second side surface is provided with a first air outlet, and the first air outlet is communicated with the gap channel; the rotating assembly is provided with a chute, the chute is provided with a notch and a side groove surface, the side groove surface extends in an inclined manner in the direction close to the protective cover, and the notch is communicated with the gap channel; the electric spindle comprises the bearing sealing structure, a shaft core, a bearing and a machine body; the bearing sealing structure ensures the sealing effect and avoids drying the lubricating medium in the bearing by the matching of the inclined channel and the inclined groove; the electric spindle with the sealing structure has stable performance and long service life.
Description
Technical Field
The invention relates to a processing machine tool, in particular to a bearing sealing structure and an electric spindle comprising the same.
Background
At present, with the development of modern machinery, the industrial field proposes the concept of industry 4.0, and the application range of the electric spindle is wider and wider. The electric spindle is a precise component and is widely applied to a high-speed and high-precision machining center, the core component of the electric spindle is a high-speed and precise spindle bearing, any tiny impurities enter the spindle bearing under the condition of high-speed operation, the spindle can vibrate, even damage the bearing, and influence the working precision and the service life of the spindle, and the bearing sealing structure of the electric spindle plays a vital role in the precision, the reliability and the service life of the electric spindle.
However, the existing bearing sealing structure has the following defects:
(1) the labyrinth seal structure is adopted, the staggered sealing elements are adopted to form a zigzag or step-shaped seal channel, and impurities are blocked in a multi-layer mode, so that the dustproof and waterproof effects are achieved, but the seal structure has a certain leakage risk, and part of tiny light impurities or moisture can still enter the bearing through the labyrinth seal channel;
(2) an air curtain sealing structure is adopted, an air sealing ring is sleeved on the main shaft and is communicated with external high-pressure gas, gas outlet holes are uniformly distributed on the air sealing ring, and the gas outlet holes discharge gas and blow out impurities, so that the dustproof and waterproof effects are achieved; however, in the air curtain sealing structure, when air is blown, part of air can be blown towards the bearing, so that impurities can be brought to the bearing; when the bearing is lubricated by grease, the lubricating grease on the bearing can be dried; thereby reducing the performance of the bearing and influencing the service life of the electric main shaft.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a bearing sealing structure with good sealing effect.
The second purpose of the present invention is to provide an electric spindle with improved working accuracy and increased spindle life.
One of the purposes of the invention is realized by adopting the following technical scheme:
the bearing sealing structure comprises a lower cover, a locking piece and a protective cover; the locking piece is connected with the protective cover to form a rotating assembly, and the rotating assembly is provided with a first side face and a second side face which are opposite; the lower cover is arranged on the second side face side of the rotating assembly, and a clearance channel is formed between the lower cover and the rotating assembly;
the lower cover is provided with a plurality of inclined channels, the inclined channels extend towards the side close to the second side face, the side close to the second side face of the inclined channels is provided with a first air outlet, and the first air outlet is communicated with the gap channel; be equipped with the chute on the runner assembly, the chute has notch and side slot face, the side slot face is toward being close the direction slope of protective cover extends, the notch with clearance passageway intercommunication.
Further, the clearance channel includes a first transition clearance and a second transition clearance;
the first transition gap is formed between the locking piece and the lower cover, and the second transition gap is formed between the protective cover and the lower cover; the chute is arranged on the locking piece, and the first air outlet is communicated with the first transition gap through the second transition gap.
Further, the lower cover comprises a lower cover body and a lower cover inner sleeve, the lower cover inner sleeve is sleeved outside the rotating assembly, the inner wall of the lower cover inner sleeve is in clearance fit with the rotating assembly, and the outer wall of the lower cover inner sleeve is connected with the lower cover body;
the inclined channel is arranged in the lower cover inner sleeve, the lower cover body is provided with an air inlet channel, and the air inlet channel is communicated with the inclined channel.
Further, the protective cover includes protective cover body and umbelliform extension body, the second side of protective cover body is toward keeping away from the direction extension of first side is equipped with the umbelliform extension body, the umbelliform extension body has toward being close the convex arc of retaining member direction extends the face.
Furthermore, the clearance channel also comprises a third clearance channel, the third clearance channel is formed between the top of the locking piece and the lower cover body, and the third clearance channel is a zigzag clearance channel with at least two bent positions.
Furthermore, the lower cover inner sleeve is provided with a first sleeve part and a second sleeve part, the first sleeve part is in clearance fit with the locking piece, and the second sleeve part is in clearance fit with the protective cover; the first air outlet is arranged in the second sleeve part.
Further, the inlet channel has the transition channel section that is to being close to the slope of protective cover direction, the transition channel section with the slope passageway intercommunication.
Further, the gap channel also comprises an air outlet gap channel; the lower cover with form between the second side of protective cover the clearance passageway of giving vent to anger, give vent to anger the clearance passageway with second transition clearance intercommunication, the clearance passageway of giving vent to anger is zigzag shape clearance passageway.
Furthermore, a first vertical surface, a first horizontal surface, a second vertical surface and a second horizontal surface are sequentially connected and extended from the second side surface of the protective cover to the direction far away from the locking piece; a matching cavity is formed among the first vertical surface, the first horizontal surface, the locking piece and the lower cover body, and the lower cover is internally sleeved in the matching cavity; the lower cover body is provided with a lug extending towards the direction close to the protective cover;
a first gap section is formed between the lower cover inner sleeve and the first horizontal plane, a second gap section is formed between the lug and the second vertical plane, and a third gap section is formed between the lug and the second horizontal plane; the air outlet gap channel is formed by sequentially communicating the first gap section, the second gap section and the third gap section, and the first gap section is connected with the second transition gap.
The second purpose of the invention is realized by adopting the following technical scheme:
an electric spindle comprises the bearing sealing structure, a shaft core, a bearing and a machine body; the shaft core is arranged in the machine body in a penetrating manner, the bearing is arranged between the shaft core and the machine body, and the bearing comprises an outer ring, an inner ring and a rolling assembly;
the locking piece is a locking nut which is sleeved on the shaft core and is in threaded connection with the shaft core, the inner ring is fixed with the shaft core through the locking nut, and the protective cover is sleeved on the shaft core and is connected with the locking nut; the lower cover body is connected with the machine body, and the outer ring is fixed with the machine body through the lower cover body; a rotating gap is formed between the rolling assembly and the lower cover body;
the air compressor is characterized in that the engine body is provided with an air flow channel, the air flow channel is communicated with the air inlet channel, and one end of the air inlet channel, which is far away from the lower cover body, is communicated with an air source.
Compared with the prior art, the invention has the beneficial effects that:
(1) an inclined channel is arranged on the lower cover, and a first air outlet of the inclined channel is communicated with the gap channel; the rotating assembly is provided with a chute, the chute extends towards the direction close to the protective cover, and a notch of the chute is communicated with the gap channel; when the bearing sealing device is used, air blown out from the inclined channel blows towards the direction of the gap channel far away from the bearing, so that the bearing sealing device has better directionality and can achieve better sealing effect;
(2) when the rotating assembly rotates around the rotating axis of the rotating assembly, air pressure difference is generated in the chute due to different centrifugal forces, so that air flow far away from the rotating axis direction can be formed in the chute, the air flow blown out from the chute opening can be blown towards the direction close to the protective cover, the air flow is used for counteracting air blown out from the inclined channel and possibly blown towards the bearing direction by the air curtain sealing structure, namely the air blown towards the direction close to the top of the locking piece, namely the air blown towards the bearing, and the effect of preventing air flow for air curtain sealing from drying bearing lubricating grease is achieved;
(3) the side slot face of chute and the slope passageway of lower cover all extend toward the direction that is close the protective cover for produce (produce in the chute) by the atmospheric pressure difference and offset the air current, with the sealed air current cooperation of the air curtain that is used for realizing the sealed effect of air curtain that flows through the slope passageway, have better directionality, make the sealed air current of air curtain can flow toward the outside direction of bearing seal structure (the direction of keeping away from the bearing) smoothly fast along clearance passageway, strengthen waterproof dirt-proof effect.
Drawings
FIG. 1 is a cross-sectional view of a bearing seal structure of the present invention;
FIG. 2 is a cross-sectional view of an electric spindle provided with a bearing seal arrangement of the present invention;
FIG. 3 is a schematic structural diagram of the lower cap inner sleeve of the present invention;
FIG. 4 is a cross-sectional view of the lower cap inner sleeve of the present invention;
FIG. 5 is a cross-sectional view of the retaining member of the present invention;
in the figure: 100. a rotating assembly; 101. a chute; 1011. a side groove surface; 110. a locking member; 1101. a first bump; 1102. a first groove; 120. a protective cover; 1201. an umbrella-shaped extension; 1202. an arc-shaped extension surface; 200. a lower cover; 201. an inclined channel; 2011. a first air outlet; 210. a lower cover body; 2101. an air intake passage; 220. a lower cover inner sleeve; 301. a third clearance channel; 3021. a first gap section; 3022. a second gap segment; 3023. a third gap segment; 400. a shaft core; 500. a bearing; 600. a machine body; 601. an air flow channel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
It should be noted that the bearing sealing structure of the present invention can be used not only for an electric spindle to seal a bearing (e.g., for an electric spindle of a horizontal machining center), but also for other shaft structures to seal the bearing.
As shown in fig. 1 to 5, the present embodiment provides a bearing sealing structure, which includes a lower cover 200, a locking member 110 and a protecting cover 120, wherein the locking member 110 is connected to the protecting cover 120 to form a rotating assembly 100, the rotating assembly 100 has a first side surface and a second side surface opposite to each other, the lower cover 200 is disposed on the second side surface of the rotating assembly 100, and a clearance channel is formed between the lower cover 200 and the rotating assembly 100; this bearing seal structure is when using, be used for installing on the main shaft, the first side of runner assembly 100 is connected with the main shaft in order to realize with the synchronous rotation of main shaft, lower cover 200 is connected with the organism, lower cover 200 is used for cooperating runner assembly 100 to realize sealed effect, in order to realize sealed to bearing 500, leave clearance passageway between runner assembly 100 and the lower cover 200, clearance passageway's inside port and bearing 500 bottom surface intercommunication, the outside port of clearance passageway and bearing seal structure (or the main shaft outside) intercommunication, when guaranteeing the relative organism rotation of main shaft, runner assembly 100 can take place relative pivoting with lower cover 200.
Specifically, in order to improve the sealing effect on the bearing 500 and overcome the defects of the labyrinth seal structure and the air curtain seal structure in the prior art, as shown in fig. 1, 3 and 4, the lower cover 200 is provided with a plurality of inclined channels 201, the inclined channels 201 are used for being communicated with an air source to introduce air or high-pressure air, the inclined channels 201 extend towards the side close to the second side surface, the side of the inclined channels 201 close to the second side surface is provided with a first air outlet 2011, the first air outlet 2011 is communicated with the gap channel, the air is blown out towards the external port of the gap channel along the inclined channels 201 so as to prevent impurities or moisture from entering the bearing 500 along the gap channel and ensure the sealing effect of the bearing 500; the rotating assembly 100 is provided with a chute 101, the chute 101 can be disposed on the locking member 110, and can also be disposed on the protecting cover 120, as shown in fig. 1 and 5, the chute 101 has a notch and a side notch surface 1011, the side notch surface 1011 extends obliquely to the direction close to the protecting cover 120, the notch is communicated with the clearance channel, when the rotating assembly 100 is matched with the spindle core 400 to rotate synchronously, since the upper end of the side groove surface 1011 is closer to the rotation axis than the lower end, when the rotating assembly 100 rotates, the two ends of the side groove surface 1011 have air pressure difference, and air flow away from the rotation axis direction is formed, the air flow is blown to the clearance channel, the counteracting airflow blown out from the slot of the chute 101 can counteract the airflow (air curtain sealing airflow) which is possibly blown to the bearing 500 from the inclined channel 201, so that the airflow is prevented from blowing to the bearing 500, and lubricating grease or other lubricating media in the bearing 500 are dried, so that the normal operation of the bearing 500 is ensured when the bearing 500 is sealed.
Specifically, when the bearing sealing structure is used, the air flow blown out from the slot of the inclined groove 101 toward the gap passage is a canceling air flow, the air flow blown out from the inclined passage 201 and flowing toward the outer port of the gap passage is an air curtain sealing air flow, and the air flow blown out from the inclined passage 201 and flowing toward the inner port of the gap passage is an interfering air flow.
Specifically, by providing the inclined passage 201 on the lower cap 200, the first air outlet 2011 of the inclined passage 201 communicates with the clearance passage; the rotating assembly 100 is provided with a chute 101, the chute 101 extends towards the direction close to the protective cover 120, and the notch of the chute 101 is communicated with the gap channel; when the bearing 500 sealing device is used, because the inclined channel 201 is obliquely arranged relative to the clearance channel, the air curtain sealing airflow has better directionality and can play a better sealing effect; and the side groove face 1011 of chute 101 and the slope passageway 201 of lower cover 200 all extend toward the direction that is close to protective cover 120, chute 101 side groove face 1011 sets up for clearance passageway slope, make and offset the air current and also have better directionality, make and offset the air current and not only can be used for blockking to disturb the air current and flow in order to avoid gas to weather bearing 500 lubricant toward clearance passageway internal port, offset the air current and still help the sealed air current of air curtain to flow toward the direction of clearance passageway external port (toward the direction of keeping away from bearing 500) smoothly fast, the waterproof dirt-proof sealed effect of reinforcing.
Preferably, in order to generate a stronger counteracting air flow when the rotating assembly 100 rotates, the number of the inclined grooves 101 is plural, and the inclined grooves 101 are vertically spaced. The number of the inclined grooves 101 in this embodiment is 2.
Preferably, in order to make the counteracting air flow block the disturbing air flow to the side of the locking member 110 away from the protecting cover 120, the distance from the chute 101 to the top of the locking member 110 is greater than the distance from the first air outlet 2011 to the top of the locking member 110.
Of course, counteracting the flow of the air curtain seal air flow toward the top of retaining member 110 can also be accomplished by: the inclined angle of the side groove surface 1011 of the chute 101 relative to the bottom of the protective cover 120 is smaller than the inclined angle of the inclined channel 201 relative to the bottom of the protective cover 120, and in the radial direction, the projection of the first air outlet 2011 relative to the notch of the chute 101, which is farther away from the top of the locking member 110 or the first air outlet 2011 in the radial direction, is covered by the projection of the notch of the chute 101 in the radial direction; by setting the inclination angle of the inclined channel 201 to be large, the airflow blown out by the inclined channel 201 has more directivity of flowing toward the outside port direction of the clearance channel relative to the offset airflow, so that the interference airflow is not easily generated, and the offset airflow blocks the interference airflow more easily.
Preferably, to facilitate the counteracting airflow generated in the chute 101 to better block the interfering airflow when the rotating assembly 100 rotates about the rotation axis, the clearance channel comprises a first transition clearance and a second transition clearance; a first transition gap is formed between the locking member 110 and the lower cover 200, and a second transition gap is formed between the protecting cover 120 and the lower cover 200; retaining member 110 is located to chute 101, and first gas outlet 2011 passes through second transition clearance and first transition clearance intercommunication.
Specifically, in order to effectively improve the offset effect of offsetting the air current that is blown out by chute 101, first transition clearance forms linear type transition clearance with second transition clearance connection, through the aforesaid setting, make the air current that is blown out by inclined channel 201 and offset the air current and get into linear type transition clearance after, offset the air current and can act on the air current that is blown out by inclined channel 201 along linear type transition clearance, both can realize with chute 101 notch and first gas outlet 2011 dislocation set, can make offsetting the air current that chute 101 blows out pass through minimum loss again, can be used to block the interference air current, effectively guarantee offsetting the efficiency that blocks of air current.
Preferably, in order to facilitate the air curtain sealing, the lower cover 200 includes a lower cover body 210 and a lower cover inner sleeve 220, the lower cover inner sleeve 220 is sleeved outside the rotating assembly 100, an inner wall of the lower cover inner sleeve 220 is in clearance fit with the rotating assembly 100, and an outer wall of the lower cover inner sleeve 220 is connected with the lower cover body 210; the inclined channel 201 is arranged in the lower cover inner sleeve 220, the lower cover body 210 is provided with an air inlet channel 2101, and the air inlet channel 2101 is communicated with the inclined channel 201.
Specifically, the lower cap inner housing 220 is an annular inner housing, and the lower cap inner housing 220 is uniformly provided with a plurality of inclined channels 201 at intervals around a central axis thereof, so as to effectively improve the air curtain sealing effect.
Preferably, in order to further prevent liquid or impurities (such as cutting fluid, chips, gas, etc.) splashed by an external machining environment from entering the clearance channel when the bearing sealing structure is in use; the protective cover 120 comprises a protective cover 120 body and an umbrella-shaped extension 1201, the umbrella-shaped extension 1201 is arranged on the second side face of the protective cover 120 body in the direction away from the first side face in an extending mode, the umbrella-shaped extension 1201 is provided with an arc-shaped extension face 1202 protruding towards the direction close to the locking piece 110, the arc-shaped extension face 1202 is in an outward turning shape, liquid splashed by an external processing environment can be thrown out of the outer circle of the large end of the arc-shaped extension face 1202, and when the rotating assembly 100 rotates (when a main shaft operates), the water splashing effect achieved by matching the arc-shaped extension face 1202 with the protective cover 120 body is better.
Preferably, in order to enhance the sealing effect, the clearance channel further includes a third clearance channel 301, the third clearance channel 301 is formed between the top of the locking member 110 and the lower cover body 210, and the third clearance channel 301 is a zigzag clearance channel having at least two bends, that is, in the channel extending direction from the external port of the clearance channel to the internal port of the clearance channel, an air curtain seal (air curtain seal airflow), a dynamic pressure seal (counteracting airflow) and a labyrinth seal (the third clearance channel 301) are sequentially provided, so that even if the counteracting airflow blocks the interfering airflow and then has a part of the airflow to the internal port of the clearance channel, the zigzag of the third clearance channel 301 can effectively weaken the strength of the residual interfering airflow, and effectively ensure that the "shaft sealing structure using the air curtain seal does not dry the lubricating medium in the bearing 500".
Specifically, as shown in fig. 1 and 5, the side of the locking member 110 away from the shield cover 120 has a first projection 1101 and a first groove 1102, the side of the lower cover body 210 close to the shield cover 120 has a second projection and a second groove, the second projection is inserted into the first groove 1102, and the first projection 1101 is inserted into the second groove to form the third zigzag gap channel 301.
Preferably, in order to conveniently stagger the slot of the chute 101 from the first air outlet 2011, the lower cover inner sleeve 220 has a first sleeve portion and a second sleeve portion, the first sleeve portion is in clearance fit with the locking member 110, and the second sleeve portion is in clearance fit with the protecting cover 120; locking member 110 is located to chute 101, and second cover portion is located to first gas outlet 2011.
Preferably, in order to improve the effect of the inclined blowing of the inclined passage 201, the gas inlet passage 2101 has a transition passage section inclined toward the shield cover 120, and the transition passage section is communicated with the inclined passage 201.
Preferably, the gap channel further comprises an air outlet gap channel; form the clearance passageway of giving vent to anger between lower cover 200 and the second side of protective cover 120, give vent to anger clearance passageway and second transition clearance intercommunication, give vent to anger clearance passageway and be zigzag clearance passageway, if like this make impurity if when will get into clearance passageway by outside processing environment, both received the stopping of tortuous clearance passageway of giving vent to anger, received the stopping of the sealed air current of air curtain again, increased sealed effect greatly.
Preferably, in order to form a tortuous air outlet gap channel, the second side surface of the protecting cover 120 is sequentially connected with and extends to a first vertical surface, a first horizontal surface, a second vertical surface and a second horizontal surface in a direction away from the locking member 110; a matching cavity is formed among the first vertical surface, the first horizontal surface, the locking member 110 and the lower cover body 210, and the lower cover inner sleeve 220 is arranged in the matching cavity; the lower lid body 210 has a protrusion extending toward the protecting cover 120; a first gap section 3021 is formed between the lower cover inner sleeve 220 and the first horizontal plane, a second gap section 3022 is formed between the bump and the second vertical plane, and a third gap section 3023 is formed between the bump and the second horizontal plane; the air outlet gap channel is formed by sequentially communicating a first gap section 3021, a second gap section 3022 and a third gap section 3023, and the first gap section 3021 is connected with the second transition gap.
As shown in fig. 2, the present embodiment further provides an electric spindle, which includes the bearing sealing structure described in the above aspect, and further includes a shaft core 400, a bearing 500, and a machine body 600; the shaft core 400 is arranged in the machine body 600 in a penetrating way, a bearing 500 is arranged between the shaft core 400 and the machine body 600, and the bearing 500 comprises an outer ring, an inner ring and a rolling component; the locking member 110 is a locking nut, the locking nut is sleeved on the shaft core 400 and is in threaded connection with the shaft core 400, the inner ring is fixed with the shaft core 400 through the locking nut, and the protective cover 120 is sleeved on the shaft core 400 and is connected with the locking nut; the lower cover body 210 is connected with the machine body 600, and the outer ring is fixed with the machine body 600 through the lower cover body 210; a rotation gap exists between the rolling assembly and the lower cover body 210; the machine body 600 is provided with an air flow channel 601, the air flow channel 601 is communicated with an air inlet channel 2101, and one end of the air inlet channel 2101 far away from the lower cover body 210 is used for being communicated with an air source. The electric main shaft using the bearing sealing structure has a good sealing effect, is beneficial to improving the working precision of the electric main shaft, stabilizing the performance of the bearing 500 and prolonging the service life of the electric main shaft.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (9)
1. Bearing seal structure, its characterized in that:
comprises a lower cover, a locking piece and a protective cover; the locking piece is connected with the protective cover to form a rotating assembly, and the rotating assembly is provided with a first side face and a second side face which are opposite; the lower cover is arranged on the second side face side of the rotating assembly, and a clearance channel is formed between the lower cover and the rotating assembly;
the lower cover is provided with a plurality of inclined channels, the inclined channels extend towards the side close to the second side face, the side close to the second side face of the inclined channels is provided with a first air outlet, and the first air outlet is communicated with the gap channel; the rotating assembly is provided with a chute, the chute is provided with a notch and a side groove surface, the side groove surface extends in an inclined manner in the direction close to the protective cover, and the notch is communicated with the gap channel; the gap channel comprises a second transition gap and also comprises an air outlet gap channel; the lower cover with form between the second side of protective cover the clearance passageway of giving vent to anger, give vent to anger the clearance passageway with second transition clearance intercommunication, the clearance passageway of giving vent to anger is zigzag shape clearance passageway.
2. The bearing seal structure according to claim 1, wherein:
the clearance channel further comprises a first transition clearance;
the first transition gap is formed between the locking piece and the lower cover, and the second transition gap is formed between the protective cover and the lower cover; the chute is arranged on the locking piece, and the first air outlet is communicated with the first transition gap through the second transition gap.
3. The bearing seal structure according to claim 2, wherein:
the lower cover comprises a lower cover body and a lower cover inner sleeve, the lower cover inner sleeve is sleeved outside the rotating assembly, the inner wall of the lower cover inner sleeve is in clearance fit with the rotating assembly, and the outer wall of the lower cover inner sleeve is connected with the lower cover body;
the inclined channel is arranged in the lower cover inner sleeve, the lower cover body is provided with an air inlet channel, and the air inlet channel is communicated with the inclined channel.
4. A bearing seal structure according to claim 3, wherein:
the protective cover includes protective cover body and umbelliform extension body, the second side of protective cover body is toward keeping away from the direction extension of first side is equipped with umbelliform extension body, umbelliform extension body has toward being close the convex arc of retaining member direction extends the face.
5. A bearing seal structure according to claim 3, wherein:
the gap channel further comprises a third gap channel, the third gap channel is formed between the top of the locking piece and the lower cover body, and the third gap channel is a zigzag gap channel with at least two bent positions.
6. A bearing seal structure according to claim 3, wherein:
the lower cover inner sleeve is provided with a first sleeve part and a second sleeve part, the first sleeve part is in clearance fit with the locking piece, and the second sleeve part is in clearance fit with the protective cover; the first air outlet is arranged in the second sleeve part.
7. A bearing seal structure according to claim 3, wherein:
the inlet channel has toward being close the transition passageway section of protective cover direction slope, the transition passageway section with slope passageway intercommunication.
8. A bearing seal structure according to claim 3, wherein:
a first vertical surface, a first horizontal surface, a second vertical surface and a second horizontal surface are sequentially connected and extended from the second side surface of the protective cover to the direction far away from the locking piece; a matching cavity is formed among the first vertical surface, the first horizontal surface, the locking piece and the lower cover body, and the lower cover is internally sleeved in the matching cavity; the lower cover body is provided with a lug extending towards the direction close to the protective cover;
a first gap section is formed between the lower cover inner sleeve and the first horizontal plane, a second gap section is formed between the lug and the second vertical plane, and a third gap section is formed between the lug and the second horizontal plane; the air outlet gap channel is formed by sequentially communicating the first gap section, the second gap section and the third gap section, and the first gap section is connected with the second transition gap.
9. An electric spindle comprising a bearing sealing structure according to any one of claims 3 to 8, characterized in that:
the device also comprises a shaft core, a bearing and a machine body; the shaft core is arranged in the machine body in a penetrating manner, the bearing is arranged between the shaft core and the machine body, and the bearing comprises an outer ring, an inner ring and a rolling assembly;
the locking piece is a locking nut which is sleeved on the shaft core and is in threaded connection with the shaft core, the inner ring is fixed with the shaft core through the locking nut, and the protective cover is sleeved on the shaft core and is connected with the locking nut; the lower cover body is connected with the machine body, and the outer ring is fixed with the machine body through the lower cover body; a rotating gap is formed between the rolling assembly and the lower cover body;
the air compressor is characterized in that the engine body is provided with an air flow channel, the air flow channel is communicated with the air inlet channel, and one end of the air inlet channel, which is far away from the lower cover body, is communicated with an air source.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811527170.XA CN109707746B (en) | 2018-12-13 | 2018-12-13 | Bearing sealing structure and electric spindle comprising same |
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| CN201811527170.XA CN109707746B (en) | 2018-12-13 | 2018-12-13 | Bearing sealing structure and electric spindle comprising same |
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| CN109707746A CN109707746A (en) | 2019-05-03 |
| CN109707746B true CN109707746B (en) | 2021-04-30 |
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| CN111360694A (en) * | 2020-04-01 | 2020-07-03 | 深圳市爱贝科精密机械有限公司 | Air seal mechanism for front end of main shaft |
| CN111716245A (en) * | 2020-06-03 | 2020-09-29 | 广州市昊志机电股份有限公司 | Main shaft structure |
| CN112025395A (en) * | 2020-09-14 | 2020-12-04 | 深圳市爱贝科精密机械有限公司 | Front end air seal mechanism of lathe spindle |
| CN112122630B (en) * | 2020-09-27 | 2022-09-27 | 泉州市井贺精密设备有限公司 | Main shaft seal structure and tool turret |
| CN113915336B (en) * | 2021-10-19 | 2022-11-18 | 珠海格力电器股份有限公司 | Air curtain seal structure, electric main shaft and machine tool equipment |
| CN114042945B (en) * | 2021-11-08 | 2024-05-28 | 沈阳城市建设学院 | Drilling and tapping machine main shaft combined pneumatic sealing structure |
| CN114251374B (en) * | 2021-12-31 | 2024-06-07 | 昆山顺之晟精密机械有限公司 | Annular wire cutting bearing seat |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0570095A2 (en) * | 1992-05-13 | 1993-11-18 | Systematic Drill Head Company Limited | Tool spindles |
| WO1997036111A1 (en) * | 1996-03-26 | 1997-10-02 | Quantum Corporation | Hydrodynamic bearing having lubricant particle traps |
| JPH10252761A (en) * | 1997-03-10 | 1998-09-22 | Showa:Kk | Dust cover structure of center bearing |
| JP2006125554A (en) * | 2004-10-29 | 2006-05-18 | Matsuura Machinery Corp | Non-contact seal structure for rotating shaft |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| CN102694435A (en) * | 2011-03-25 | 2012-09-26 | 日本电产株式会社 | Spindle motor and storage disk drive |
| CN203717918U (en) * | 2013-12-31 | 2014-07-16 | 广州市昊志机电股份有限公司 | Rotary oil seal structure of blender main shaft |
| CN203979415U (en) * | 2014-07-25 | 2014-12-03 | 北京机电院机床有限公司 | A kind of gas sealing mechanism of machine tool chief axis |
| CN204042008U (en) * | 2014-06-27 | 2014-12-24 | 深圳市速锋科技有限公司 | The forward end seal structure of mechanical main shaft |
| CN104613180A (en) * | 2014-09-25 | 2015-05-13 | 广州市昊志机电股份有限公司 | Improved electric spindle sealing structure and spindle core sealing device |
| CN204387334U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | Lathe spindle nose sealing configuration |
| CN108240476A (en) * | 2016-12-27 | 2018-07-03 | 深圳光启合众科技有限公司 | Shaft sealer |
-
2018
- 2018-12-13 CN CN201811527170.XA patent/CN109707746B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0570095A2 (en) * | 1992-05-13 | 1993-11-18 | Systematic Drill Head Company Limited | Tool spindles |
| WO1997036111A1 (en) * | 1996-03-26 | 1997-10-02 | Quantum Corporation | Hydrodynamic bearing having lubricant particle traps |
| JPH10252761A (en) * | 1997-03-10 | 1998-09-22 | Showa:Kk | Dust cover structure of center bearing |
| JP2006125554A (en) * | 2004-10-29 | 2006-05-18 | Matsuura Machinery Corp | Non-contact seal structure for rotating shaft |
| CN101216111A (en) * | 2008-01-04 | 2008-07-09 | 洛阳轴研科技股份有限公司 | Method for implementing bearing hermetic sealing for machining inner screw thread copper pipe |
| CN102694435A (en) * | 2011-03-25 | 2012-09-26 | 日本电产株式会社 | Spindle motor and storage disk drive |
| CN203717918U (en) * | 2013-12-31 | 2014-07-16 | 广州市昊志机电股份有限公司 | Rotary oil seal structure of blender main shaft |
| CN204042008U (en) * | 2014-06-27 | 2014-12-24 | 深圳市速锋科技有限公司 | The forward end seal structure of mechanical main shaft |
| CN203979415U (en) * | 2014-07-25 | 2014-12-03 | 北京机电院机床有限公司 | A kind of gas sealing mechanism of machine tool chief axis |
| CN104613180A (en) * | 2014-09-25 | 2015-05-13 | 广州市昊志机电股份有限公司 | Improved electric spindle sealing structure and spindle core sealing device |
| CN204387334U (en) * | 2014-12-26 | 2015-06-10 | 广州市昊志机电股份有限公司 | Lathe spindle nose sealing configuration |
| CN108240476A (en) * | 2016-12-27 | 2018-07-03 | 深圳光启合众科技有限公司 | Shaft sealer |
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| CN109707746A (en) | 2019-05-03 |
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