CN112024910B - Electric main shaft and knife striking cylinder assembly for electric main shaft - Google Patents
Electric main shaft and knife striking cylinder assembly for electric main shaft Download PDFInfo
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- CN112024910B CN112024910B CN202010686609.4A CN202010686609A CN112024910B CN 112024910 B CN112024910 B CN 112024910B CN 202010686609 A CN202010686609 A CN 202010686609A CN 112024910 B CN112024910 B CN 112024910B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/155—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling
- B23Q3/157—Arrangements for automatic insertion or removal of tools, e.g. combined with manual handling of rotary tools
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Abstract
The invention relates to an electric spindle and a unclamping cylinder assembly for the electric spindle, wherein a rotary joint shaft is assembled in a joint mounting hole of a unclamping piston in the electric spindle, the rotary joint shaft is correspondingly communicated with a rotary joint rod and a cooling joint, cooling liquid supplied by the cooling joint enters a central cooling channel of a pull rod through a joint shaft central hole and a joint rod central hole, the rotary joint shaft and the cooling joint can rotate relatively, the supply of the cooling liquid can be realized without assembling the rotary joint again, in addition, the rotary joint shaft is arranged in the joint mounting hole of the unclamping piston, the axial length cannot be additionally increased, the miniaturization design of the electric spindle is facilitated, in addition, the service life of the unclamping cylinder assembly can be effectively prolonged, and the continuous and efficient operation of the electric spindle is ensured.
Description
Technical Field
The invention relates to an electric spindle and a knife cylinder assembly for the electric spindle.
Background
The high-speed electric spindle is a core component of a high-speed processing machine tool, a rotating shaft is arranged in the electric spindle, the rotating shaft is fixedly assembled with a motor rotor, a pull rod is arranged in the rotating shaft, and the pull rod is driven by the cooperation of an oil cylinder and a disc spring to move back and forth so as to realize the actions of loosening and clamping a cutter. For example, in the synchronous electric spindle disclosed in chinese patent application publication No. CN110947981A, the rear end of the pull rod is connected with a pull rod connection rod through a thread, a piston is disposed inside the cylinder, the piston is sleeved on the pull rod connection rod, a wear-resistant rod is disposed between the piston and the pull rod connection rod, a step is disposed on the pull rod connection rod for the piston to push forward to drive the pull rod to move forward to release the tool, when the tool needs to be clamped, the piston moves backward, and the disc spring drives the pull rod to move backward to drive the tool claw to clamp the tool.
In the high-speed machining process, a contact area between a cutter and a workpiece generates a large amount of cutting heat, and if the contact area is not reasonably controlled, the machining efficiency and the cutter durability are not favorably improved, and even more, the generated thermal deformation can reduce the machining precision of a machine tool and influence the machining quality of the workpiece, and particularly in the deep hole machining process, the machining quality is obviously influenced. Therefore, a central cooling channel is usually arranged in the center of the pull rod, and external cooling liquid can enter the central cooling channel and is directly conveyed to the cutting area through the pull rod and the cutter, so that the abrasion of the cutter is reduced, the overheating is prevented, the friction is reduced, and cutting chips are removed. The specific structure of the synchronous electric spindle is as disclosed in the Chinese patent with application publication No. CN110947981A, a cooling through hole is also arranged on a connecting rod of the pull rod to be communicated with a central cooling channel of the pull rod, the rear end of the connecting rod of the pull rod is connected with a rotary joint, and cooling liquid enters the pull rod through the rotary joint and the connecting rod of the pull rod to realize cooling of a cutting area of a cutter. In the patent application of the invention, the rear end of the pull rod connecting rod penetrates through the corresponding oil cylinder, and the penetrating rear end is specially connected with the rotary joint, so that the whole length of the electric spindle is increased, and the special rotary joint needs to be purchased separately, is mainly imported from foreign countries, is high in price and long in delivery date, and causes the design and manufacturing cost of the whole electric spindle to be relatively high.
Disclosure of Invention
The invention aims to provide an electric spindle, which aims to solve the technical problem that in the prior art, when the rear end of a connecting rod of a pull rod penetrates out of a corresponding oil cylinder, a rotary joint needs to be connected, so that the manufacturing cost is high; meanwhile, the invention also provides a unclamping cylinder assembly for the electric spindle.
In order to achieve the above purpose, the electric spindle provided by the invention has the technical scheme 1 that: an electric spindle comprising:
the front end of the rotating shaft is used for assembling a cutter and is provided with a rotating shaft center hole;
the pull rod is movably assembled in the central hole of the rotating shaft and is provided with a central cooling channel;
the knife striking cylinder comprises a cylinder body, and a knife striking piston is movably assembled in the cylinder body along the front-back direction;
the broach elastic piece is arranged between the rotating shaft and the pull rod and is used for matching with the unclamping piston to drive the pull rod to move back and forth so as to realize the operations of loosening the broach forwards and pulling the broach backwards;
the joint mounting hole is arranged on the cutter beating piston and extends along the front-back direction;
the rotary joint shaft is rotatably assembled in the joint mounting hole through a bearing structure and synchronously moves along with the unclamping piston in the front-rear direction, and the rotary joint shaft is provided with a joint shaft center hole;
the cooling joint is fixedly arranged on the cylinder body or is fixedly arranged opposite to the cylinder body, the cooling joint is provided with a fluid output end and a fluid input end, the fluid input end is positioned outside the cylinder body, the fluid output end is positioned in the cylinder body and is inserted into the central hole of the joint shaft in a forward clearance manner, and a sealing structure is arranged between the cooling joint and the rotary joint shaft to prevent cooling liquid from overflowing;
a rotary joint rod is fixedly arranged at the rear end of the pull rod integrally or separately, and the rotary joint rod and the rotary joint shaft are in sealed sliding insertion fit in the front-rear direction and are relatively fixed in the circumferential direction so as to drive the rotary joint shaft to rotate relative to the cooling joint;
the rotary joint rod is provided with a joint rod central hole which is communicated with the joint shaft central hole and the central cooling channel.
The beneficial effects are that: according to the electric spindle provided by the invention, the rotary joint shaft is assembled in the joint mounting hole of the cutter beating piston, the rotary joint shaft is correspondingly communicated with the rotary joint rod and the cooling joint, cooling liquid supplied by the cooling joint enters the central cooling channel of the pull rod through the joint shaft central hole and the joint rod central hole, the rotary joint shaft and the cooling joint can rotate relatively, the supply of the cooling liquid can be realized without assembling the rotary joint, and the rotary joint shaft is arranged in the joint mounting hole of the cutter beating piston, so that the axial length is not additionally increased, and the miniaturization design of the electric spindle is facilitated.
Electric spindle technical scheme 2: as a further improvement to the electric spindle technical scheme 1, the sealing structure is arranged between the fluid output end and a central hole of the joint shaft, and the sealing structure is a non-contact type air sealing structure or a contact type rotary dynamic sealing structure.
The beneficial effects are that: the rotary sealing of the fluid output end and the central hole of the joint shaft is realized by utilizing a non-contact air seal structure or a contact rotary sealing structure.
Electric spindle technical scheme 3: as a further improvement to the electric spindle technical scheme 2, when the sealing structure is a non-contact air sealing structure, an air storage tank is arranged on the periphery of the fluid output end and/or the hole wall of the central hole of the joint shaft, the electric spindle comprises a spindle box, a cylinder body is positioned on the rear side of the spindle box, the rotating shaft is rotatably assembled in the spindle box through front and rear support bearings, an oil-gas lubrication channel is arranged on the spindle box and used for oil-gas lubrication of the front and rear support bearings, a communication gap is reserved between the rotary joint shaft and the joint mounting hole and is communicated with the air storage tank and the oil-gas lubrication channel, so that compressed oil gas is injected into the air storage tank, and further, air sealing is formed when the rotary joint shaft and the cooling joint rotate.
The beneficial effects are that: the compressed oil gas provided by the oil gas lubrication channel can be guided into the gas storage tank by utilizing the communication gap between the rotary joint shaft and the joint mounting hole, and the gas seal is formed when the rotary joint shaft and the cooling joint rotate relatively, so that the cooling liquid is effectively prevented from leaking.
Electric spindle technical scheme 4: as a further improvement to the electric spindle technical scheme 3, the communication gap extends in the front-rear direction, and extends forwards to the front end of the unclamping piston and backwards to the rear end of the unclamping piston.
The beneficial effects are that: the communicating gap runs through the whole knife forging piston, and compressed oil and gas on the front side are conveniently guided to the rear end.
Electric spindle technical scheme 5: as a further improvement to the technical scheme 4 of the electric spindle, the cylinder body is provided with a pressure chamber, the piston is provided with a piston flange assembled in the pressure chamber, the pressure chamber is used for introducing driving fluid to drive the cutter striking piston to move back and forth, the cylinder body is also provided with an air chamber, the air chamber is positioned at the rear side of the pressure chamber and is separated from the pressure chamber, the rear end of the cutter striking piston extends into the air chamber, and the air chamber is communicated with the air storage tank and the communication gap.
The beneficial effects are that: the air cavity is arranged on the cylinder body, so that the communication between the air storage tank and the communication gap is conveniently realized, and the structure is simple.
Electric spindle technical scheme 6: as a further improvement to the electric spindle technical scheme 4, the front end and the rear end of the unclamping piston are respectively fixed with an assembly end cover, the assembly end covers are in clearance fit with the rotary joint shaft, and the assembly end cover at the front end has a top pressing front end face for pushing the pull rod to move forward when the unclamping piston moves forward.
Electric spindle technical scheme 7: as a further improvement to the electric spindle technical scheme 3, the front ends of the spindle box and the cylinder body enclose an oil gas chamber, the front end of the unclamping piston extends into the oil gas chamber, and the oil gas chamber is respectively communicated with the oil gas lubrication passage and the communication gap.
Electric spindle technical scheme 8: as a further improvement of any one of the technical solutions 3 to 7, the air storage groove is an annular air storage groove, and a plurality of annular air storage grooves are sequentially distributed at intervals in the front-rear direction and communicated with each other through an assembly gap between the central hole of the joint shaft and the fluid output end.
The beneficial effects are that: the annular gas storage tank is adopted, so that the gas seal attenuation is reduced, and the gas seal effect can be effectively improved.
Electric spindle technical scheme 9: as a further improvement of any one of the technical solutions 1 to 7, the rear end of the rotary joint rod is in sealed sliding insertion fit with the joint shaft center hole, and is relatively fixedly assembled in the circumferential direction.
The beneficial effects are that: the rear end of the rotary joint rod is inserted into the central hole of the joint shaft, the structure is simple, the assembly is convenient, and the radial dimension cannot be additionally increased.
The invention provides a knife striking cylinder component for an electric spindle, which adopts the technical scheme 1 that: unclamping cylinder subassembly for electricity main shaft includes:
the cylinder body is fixedly arranged on the rear side of a main spindle box of the electric spindle;
the knife striking piston is assembled in the cylinder body in a guiding and moving manner along the front-back direction;
the joint mounting hole is arranged on the cutter beating piston and extends along the front-back direction;
the rotary joint shaft is rotatably assembled in the joint mounting hole through a bearing structure and synchronously moves along with the unclamping piston in the front-rear direction, and the rotary joint shaft is used for being hermetically and slidably inserted and assembled with the rear end of a rotary joint rod of the electric spindle in the front-rear direction and relatively fixedly assembled in the circumferential direction;
the rotary joint shaft is provided with a joint shaft center hole and is used for being communicated with a center cooling channel on the electric spindle pull rod through a joint rod center hole of the rotary joint rod;
the cooling joint is fixedly arranged on the cylinder body and provided with a fluid output end and a fluid input end, the fluid input end is positioned outside the cylinder body, the fluid output end is positioned inside the cylinder body and inserted into the central hole of the joint shaft in a forward clearance mode, and a sealing structure is arranged between the cooling joint and the rotary joint shaft to prevent cooling liquid from overflowing.
The beneficial effects are that: according to the cutter cylinder assembly for the electric spindle, the rotary joint shaft is assembled in the joint mounting hole of the cutter piston and is correspondingly communicated with the cooling joint, when the cutter cylinder assembly is used, the rotary joint shaft is correspondingly communicated with the rotary joint rod, cooling liquid supplied by the cooling joint enters the central cooling channel of the pull rod through the joint shaft central hole and the joint rod central hole, the rotary joint shaft and the cooling joint can rotate relatively, the cooling liquid can be supplied without assembling the rotary joint, the rotary joint shaft is arranged in the joint mounting hole of the cutter piston, the axial length cannot be additionally increased, and the miniaturization design of the electric spindle is facilitated.
Knife striking cylinder component for electric main shaft technical scheme 2: as a further improvement of the technical scheme 1 of the unclamping cylinder assembly for the electric spindle, the sealing structure is arranged between the fluid output end and a central hole of the joint shaft, and the sealing structure is a non-contact type air sealing structure or a contact type rotary dynamic sealing structure.
The beneficial effects are that: the rotary sealing of the fluid output end and the central hole of the joint shaft is realized by utilizing a non-contact air seal structure or a contact rotary sealing structure.
Knife striking cylinder component technical scheme 3 for electric main shaft: as a further improvement of the technical scheme 2 of the knife cylinder assembly for the electric spindle, when the sealing structure is a non-contact air sealing structure, an air storage tank is arranged on the periphery of the fluid output end and/or the hole wall of the central hole of the joint shaft, the electric spindle comprises a spindle box, a cylinder body is positioned on the rear side of the spindle box, the rotating shaft is rotatably assembled in the spindle box through front and rear support bearings, an oil-gas lubrication channel is arranged on the spindle box and used for oil-gas lubrication of the front and rear support bearings, a communication gap is reserved between the rotary joint shaft and the joint mounting hole and is communicated with the air storage tank and the oil-gas lubrication channel, so that compressed oil-gas is injected into the air storage tank, and further, air sealing is formed when the rotary joint shaft and the.
The beneficial effects are that: the compressed oil gas provided by the oil gas lubrication channel can be guided into the gas storage tank by utilizing the communication gap between the rotary joint shaft and the joint mounting hole, and the gas seal is formed when the rotary joint shaft and the cooling joint rotate relatively, so that the cooling liquid is effectively prevented from leaking.
The technical scheme of the unclamping cylinder assembly for the electric spindle is as follows: as a further improvement to the technical solution 3 of the unclamping cylinder assembly for an electric spindle, the communication gap extends in the front-rear direction, and extends forward to the front end of the unclamping piston and rearward to the rear end of the unclamping piston.
The beneficial effects are that: the communicating gap runs through the whole knife forging piston, and compressed oil and gas on the front side are conveniently guided to the rear end.
Knife striking cylinder component for electric main shaft technical scheme 5: as a further improvement of the technical scheme 4 of the unclamping cylinder assembly for the electric spindle, the cylinder body is provided with a pressure cavity, the piston is provided with a piston flange assembled in the pressure cavity, the pressure cavity is used for introducing driving fluid to drive the unclamping piston to move back and forth, the cylinder body is also provided with an air cavity, the air cavity is positioned at the rear side of the pressure cavity and separated from the pressure cavity, the rear end of the unclamping piston extends into the air cavity, and the air cavity is communicated with the air storage tank and the communication gap.
The beneficial effects are that: the air cavity is arranged on the cylinder body, so that the communication between the air storage tank and the communication gap is conveniently realized, and the structure is simple.
Knife striking cylinder component technical scheme 6 for electric main shaft: as a further improvement of the technical scheme 4 of the unclamping cylinder assembly for the motorized spindle, the front end and the rear end of the unclamping piston are respectively fixed with an assembly end cover, the assembly end covers are in clearance fit with the rotary joint shaft, and the assembly end cover at the front end is provided with a jacking front end face for pushing the pull rod to move forwards when the unclamping piston moves forwards.
Knife striking cylinder component technical scheme 7 for electric main shaft: as a further improvement of any one of the technical schemes 3 to 6 of the cutter striking cylinder assembly for the electric spindle, the air storage grooves are annular air storage grooves which are sequentially distributed at intervals in the front-back direction and communicated with each other through an assembly gap between the central hole of the joint shaft and the fluid input end.
The beneficial effects are that: the annular gas storage tank is adopted, so that the gas seal attenuation is reduced, and the gas seal effect can be effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of an electric spindle according to embodiment 1 of the present invention;
FIG. 2 is a rear partial view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of the unclamping piston in FIG. 2;
FIG. 4 is a schematic structural view of the cooling joint of FIG. 2;
FIG. 5 is an enlarged view taken at A in FIG. 2;
FIG. 6 is an enlarged view of FIG. 5 at B;
FIG. 7 is an enlarged view at C of FIG. 5;
FIG. 8 is an enlarged view of FIG. 2 at D;
the arrows in the figure show the flow direction of the compressed oil gas.
Description of reference numerals:
1. a cutter, 3, a front end cover, 5, a front bearing seat, 10, an outer shell, 12, a motor stator, 13, a motor rotor, 14, a rotating shaft, 15, a pull rod, 16, a disc spring, 23, a rear end cover, 25, an encoder fluted disc, 26, a rear nut, 27, a cylinder connecting disc, 29, a cooling joint, 30, a solenoid valve, 32, an oil cylinder cover, 33, a knife striking piston, 330, a piston flange, 34, a rotary joint shaft, 35, an oil cylinder seat, 36, a rotary joint rod, 40, a cylinder resetting oil inlet channel, 41, a cylinder resetting oil inlet cavity, 42, a cylinder loosening knife inlet cavity, 43, an air cavity, 44, a cooling joint channel, 45, a cylinder loosening knife inlet channel, 46, a joint shaft center hole, 47, a communication gap, 48, a joint rod center hole, 49, an oil gas cavity, 51, a center cooling channel, 52, a cooling channel, 53, a rear assembling end cover, 54 and a rear gland nut, 55. rear bearing end cover 56, front gland nut 57, front bearing end cover 58, front assembly end cover 60, front bearing 61, rear bearing 62, annular gas storage tank 64, rear support bearing 65 and compressed oil gas.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
The specific embodiment 1 of the electric spindle provided by the invention:
as shown in fig. 1 to 8, the electric spindle in this embodiment mainly includes a spindle box, a motor and a rotating shaft 14 are disposed inside the spindle box, and a front bearing support structure and a rear bearing support structure are disposed corresponding to the rotating shaft 14 to function as a rotary support. The motor comprises a motor stator 12 and a motor rotor 13, the motor stator 12 and the motor rotor 13 are positioned between a front bearing support structure and a rear bearing support structure and play a role of a power source, the motor rotor 13 is fixedly assembled with a rotating shaft 14, the rotating shaft 14 is provided with a rotating shaft central hole, a pull rod 15 is movably assembled in the rotating shaft central hole along the front-rear direction, the rear end of the pull rod 15 is fixedly connected with a rotary joint rod 36, a unclamping cylinder is arranged corresponding to the pull rod 15, a disc spring 16 is arranged between the rotating shaft 14 and the pull rod 15, a unclamping piston 33 in the unclamping cylinder is used for pushing the pull rod 15 to move forwards to realize unclamping operation, the disc spring 16 is used for driving the pull rod 15 to move backwards to realize broaching operation, and the disc spring 16 serving as a broaching elastic piece is matched with the unclamping cylinder to drive the pull rod 15 to move forwards and backwards and forwards in a reciprocating mode.
In addition, in order to detect the rotation of the rotating shaft 14, an encoder fluted disc 25 is disposed at the rear end of the rotating shaft 14, and correspondingly, an encoder reading head is disposed on the rear end cover 23 for reading the rotation speed of the encoder fluted disc 25.
In this embodiment, the rotating shaft 14 is rotatably assembled inside the spindle box by a front support bearing and a rear support bearing 64. In fact, in the present case, the headstock specifically includes middle shell body 10, shell body 10 front end is equipped with front bearing seat 5 through bolt fastening, front end housing 3 is fixed to be equipped with at front bearing seat 5 front end, rear end at shell body 10 is equipped with rear end housing 23 through bolt fastening, be equipped with hydro-cylinder connection pad 27 on the rear end housing 23, the fixed unclamping cylinder that is equipped with of hydro-cylinder connection pad 27 rear end, the cylinder body and the hydro-cylinder connection pad 27 fixed Assembly of specific unclamping cylinder, with form oil gas chamber 49 at the headstock rear side.
During the use, motor rotor 13 takes pivot 14, pull rod 15 to rotate and realizes milling process, and preceding support bearing and back support bearing play the effect of corresponding rotation support, for realizing the bearing lubrication to reduce the inside temperature of electric main shaft, be equipped with the oil-gas lubrication passageway on the headstock, to the inside compressed oil gas that injects of headstock, compressed oil gas gets into corresponding bearing position through corresponding gap passageway, realizes the lubrication and the cooling to the bearing.
It should be noted that, as shown in fig. 2 and 8, gaps are formed among the rear support bearing 64, the rear end cover 23 and the sleeve, and part of the compressed oil gas 65 enters the oil gas chamber 49 on the rear side according to the arrow path shown in fig. 8, where a high-pressure environment is formed.
In this embodiment, the cooling joint 29 is installed on the unclamping cylinder to form a unclamping cylinder assembly, and during installation, the unclamping cylinder assembly can be assembled and then integrally installed on the oil cylinder connecting plate 27.
The unclamping cylinder is specifically a hydraulic cylinder and comprises a cylinder body, a unclamping piston 33 is movably assembled in the cylinder body along the front-back direction, the cylinder body specifically comprises an oil cylinder seat 35 and an oil cylinder cover 32, the oil cylinder cover 32 is fixedly assembled on the oil cylinder seat 35 in a sealing mode to enclose a pressure cavity, the unclamping piston 33 is provided with a piston flange 330, the piston flange 330 divides the pressure cavity into an oil cylinder reset oil inlet cavity 41 at the front side and an oil cylinder unclamping oil inlet cavity 42 at the rear side, correspondingly, an oil cylinder reset oil inlet channel 40 is communicated with the oil cylinder reset oil inlet cavity 41 and is used for supplying hydraulic oil to drive the unclamping piston 33 to reset backwards, an oil cylinder unclamping oil inlet channel 45 and the oil cylinder unclamping oil inlet cavity 42 are arranged and are used for supplying hydraulic oil to drive the unclamping piston 33 to move forwards to push the pull rod 15. Here the hydraulic oil is selected to provide a larger driving force. In other embodiments, if the required driving force is small, the cylinder can be selected according to actual requirements, and high-pressure gas is selected to drive the unclamping piston to reciprocate.
A joint mounting hole is formed in the unclamping piston 33, the joint mounting hole extends in the front-rear direction, the rotary joint shaft 34 is assembled in the joint mounting hole, as shown in fig. 3, the rotary joint shaft 34 is rotatably assembled in the joint mounting hole through a bearing structure, the bearing structure comprises a front bearing 60 and a rear bearing 61, for the front bearing 60, an inner ring of the front bearing 60 is arranged on the rotary joint shaft 34 in an interference fit manner, an inner ring of the front bearing 60 is fixed by a front gland nut 56 fixedly assembled at the front end of the rotary joint shaft 34, an outer ring of the front bearing 60 is assembled in the joint mounting hole and is blocked and fixed by a front bearing end cover 57 fixedly assembled at the front end of the unclamping piston 33, and a front assembling end cover 58 is fixedly assembled at the front end of the unclamping piston 33, and the front assembling end cover 58 is assembled with the rotary joint shaft; the rear bearing 61 is mounted on the rotary joint shaft 34 with an inner ring thereof in an interference fit manner, the inner ring of the rear bearing 61 is fixed by a rear gland nut 54 fixedly mounted at the rear end of the rotary joint shaft 34, the outer ring of the rear bearing 61 is mounted in the joint mounting hole and is retained and fixed by a rear bearing end cover 55 fixedly mounted at the rear end of the unclamping piston 33, and a rear mounting end cover 53 is fixedly mounted at the rear end of the unclamping piston 33, and the rear mounting end cover 53 is clearance-mounted with the rotary joint shaft 34.
Since the rotary joint shaft 34 is fitted with the joint mounting hole of the unclamping piston 33 with a clearance, a communication clearance 47 is formed therebetween, and the communication clearance 47 extends in the front-rear direction, forwardly to the front end of the unclamping piston 33, and rearwardly to the rear end of the unclamping piston 33.
The front and rear bearing end covers and the front and rear gland nuts drive the rotary joint shaft 34 to synchronously move along with the unclamping piston 33 in the front and rear directions, and the rotary joint shaft can freely rotate relative to the unclamping piston 33 in the circumferential direction.
The center of the rotary joint shaft 34 is provided with a joint shaft center hole 46 which is communicated with the cooling joint 29 so as to lead cooling liquid into a central cooling channel 51 of the pull rod 15, send the cooling liquid into a tool shank cooling channel 52 through the central cooling channel 51 and flow into a machining cutting area of the cooling tool 1 for cooling.
The rear end of the pull rod 15 is fixedly provided with a rotary joint rod 36 in a split manner, the front end of the rotary joint rod 36 is tightly assembled with the pull rod 15 through threads, the rear end of the rotary joint rod 36 is in sealing sliding insertion fit with the joint shaft center hole 46 in the front-rear direction and is relatively fixedly assembled in the circumferential direction, specifically, an eight-direction hole section is arranged in the joint shaft center hole 46, the rear end of the rotary joint rod 36 is provided with an eight-direction shaft section, the eight-direction shaft section is in matched insertion fit with the eight-direction hole section, the fixed assembly of rotation stopping can be realized in the circumferential direction, the sealing sliding insertion fit of the rotary joint rod 36 and the joint shaft center hole 46 in the front-rear direction is not limited, a sealing groove is arranged on the joint shaft center hole 46, an O-shaped ring is arranged in the sealing groove and.
It should be noted that, in the present embodiment, the engagement between the octagonal hole and the octagonal shaft is adopted, and in other embodiments, the engagement between the hexagonal hole and the hexagonal shaft, the engagement between the tetragonal hole and the tetragonal shaft, or the engagement between the flat shaft and the flat hole may be adopted, as long as the sliding assembly between the two in the front and rear direction and the relatively fixed assembly in the circumferential direction are ensured.
The rotary joint lever 36 has a joint lever center hole 48, and the joint lever center hole 48 communicates with the joint shaft center hole 46 and the center cooling passage 51 to guide the cooling fluid introduced into the joint shaft center hole 46 by the cooling joint 29 toward the front end of the tie rod 15.
The cooling joint 29 is fixedly mounted on the cylinder block, and as shown in fig. 2, a mounting hole is provided in the cylinder head 32, and the cooling joint 29 is fitted to the cylinder head 32 in a corresponding manner. The cooling joint 29 has a fluid outlet at the front end and a fluid inlet at the rear end, the fluid outlet extending into the cylinder and being inserted into the joint shaft center hole 46 with a forward clearance, and a sealing structure is provided between the cooling joint 29 and the rotary joint shaft 34 to prevent the coolant from overflowing.
The fluid input end of the cooling joint 29 is connected with the corresponding electromagnetic valve 30, the electromagnetic valve is a reversing valve, high-pressure gas and cooling liquid can be injected into the cooling joint 29 according to actual needs, when the high-pressure gas is injected, the high-pressure gas enters the mounting position of the tool holder through the cooling joint 29, the joint shaft center hole 46, the joint rod center hole 48 and the central cooling channel 51, the positioning surface of the tool holder is swept, the positioning surface is kept to be extremely high in cleanliness, when the electric spindle works, the cooling liquid is injected into the cooling joint 29 through the electromagnetic valve 30 and enters the tool holder cooling channel 52 through the cooling joint 29, the joint shaft center hole 46, the joint rod center hole 48 and the central cooling channel 51, the pull rod and the rotating shaft are cooled, a cooling machining cutting area can be cleaned, tool abrasion and overheating are reduced, friction is reduced, and.
A sealing structure, specifically a non-contact type air seal structure, is disposed between the fluid output end and the joint shaft center hole 46 to achieve sealing between the cold joint 29 and the rotary joint shaft 34, specifically, as shown in fig. 3, an air reservoir is provided on the rear end hole wall of the joint shaft center hole 46, the air outlet grooves are annular air storage grooves 62, a plurality of annular air storage grooves 62 are sequentially distributed at intervals in the front-back direction, the cross section of each annular air storage groove is rectangular, as shown in figure 4, for the cooling joint 29, the radial dimension of the fluid output end is D, as shown in fig. 3, the radial dimension of the rear end bore wall of the joint shaft central bore 46 is D, the radial dimension of the rear end bore wall is D larger than the radial dimension of the fluid output end, to provide a mounting clearance between the joint shaft central bore 46 and the fluid output end that communicates all of the annular air reservoirs 62.
In this embodiment, as shown in fig. 5, an air chamber 43 is further provided on the cylinder body, the air chamber 43 is located at the rear side of the pressure chamber and isolated from the pressure chamber, specifically, the air chamber 43 is located in the cylinder head 32, the rear end of the unclamping piston 33 extends into the air chamber, a sealing ring is provided on the inner wall of the cylinder head 32 to separate the pressure chamber from the air chamber, thereby preventing hydraulic oil from entering the air chamber and affecting cleaning, the air chamber 43 here is communicated with the annular air storage groove 62 through an assembly gap, and, because the communication gap 47 between the rotary joint shaft 43 and the unclamping piston 33 extends to the rear end of the unclamping piston 33, the air chamber 43 is made to communicate the annular air storage groove 62 and the communication gap.
As shown in fig. 2, when the oil cylinder seat 35 and the oil cylinder connecting disc 27 are fixedly assembled together, an oil gas chamber 49 is formed around the rear side of the headstock, that is, the front ends of the headstock and the cylinder body enclose the oil gas chamber 49, the front end of the unclamping piston 33 extends into the oil gas chamber 49, and since the communication gap 47 between the rotary joint shaft 34 and the unclamping piston 33 extends to the front end of the unclamping piston 33, the communication gap 47 is correspondingly communicated with the oil gas chamber 49, and thus, the communication gap 47 is communicated with the oil gas lubrication channel through the oil gas chamber 49.
Because the inside front support bearing and the back support bearing of compressed oil-gas lubrication are adopted, compressed oil-gas is injected into the spindle box through the oil-gas lubrication channel, and after lubricating the internal rotating part, the compressed oil-gas enters the oil-gas cavity 49 through the assembly gap, so that the oil-gas cavity forms a high-pressure environment.
The high-pressure compressed oil gas 65 enters the annular gas storage tank 62 through the communicating gap 47, the gas cavity 43 and the assembling gap, and when the rotary joint shaft 34 rotates at a high speed relative to the cooling joint 29, an air curtain can be formed at the position to form a non-contact type gas sealing structure, so that the cooling liquid is effectively prevented from overflowing and flowing back, and the leakage is avoided. Furthermore, since the rotary joint shaft 34 and the cold zone joint 29 are clearance fitted, they are suitable for high speed and ultra high speed electric spindle applications, and support dry running and can withstand a certain coolant pressure.
It should be noted that, as shown in fig. 6 and 7, since the front bearing cover 57, the front gland nut 56, the rear gland nut 54 and the rear bearing cover 55 occupy a part of the space between the unclamping piston 33 and the rotary joint shaft 34, as indicated by arrows, compressed oil gas flows through gaps between the front bearing cover 57, the front gland nut 56, the rear gland nut 54 and the rear bearing cover 55, and gaps are formed between the front assembly cover 58 and the rear assembly cover 53 and the rotary joint shaft 34, so as to ensure normal passage of the oil gas.
When the tool is used, high-pressure clean gas is controlled to be introduced into the cooling joint 29 through the electromagnetic valve 30, the central cooling channel 51 is used for purging the installation positioning surface of the tool shank, the cleanliness is kept, and impurities are prevented from entering to affect the installation precision of the tool 1.
When the cutter needs to be replaced, under the action of hydraulic pressure, the cutter beating piston 33 moves forwards, the front assembly end cover 58 pushes the pull rod 15 forwards, the corresponding cutter pulling claw opens, the cutter is loosened, and the cutter can be detached for normal replacement.
When the pull rod 15 moves forwards, the disc spring is driven to compress and store energy, and when the broach clamps the cutter, the unclamping piston 33 moves backwards, the elastic potential energy of the disc spring is released, the pull rod is driven to move backwards, and the broach claw clamps the cutter.
It should be noted that, since the rotary joint rod 36 and the rotary joint shaft 34 are sealingly inserted and fitted in the front-rear direction, it is not affected that the rotary joint shaft 34 is driven to move together when the unclamping piston 33 reciprocates.
When the electric spindle works, the rotating shaft 14 drives the pull rod 15 to rotate at a high speed, the pull rod 15 drives the rotary joint shaft 34 to rotate through the rotary joint rod 36, meanwhile, high-pressure compressed oil gas 65 enters the annular gas storage tank 62 through the communicating gap 47, the gas cavity 43 and the assembling gap, and when the rotary joint shaft 34 rotates at a high speed relative to the cooling joint 29, a gas curtain can be formed at the position to form a non-contact type gas sealing structure, so that the cooling liquid is effectively prevented from overflowing and flowing back, and the leakage is avoided.
The specific embodiment 2 of the electric spindle provided by the invention:
the difference from example 1 is mainly that: in embodiment 1, the gas storage tank on the rotary joint shaft adopts an annular gas storage tank, and the annular gas storage tank is a rectangular tank.
The annular gas storage groove can be a rectangular groove, or a U-shaped groove or a V-shaped groove.
the difference from example 1 is mainly that: in embodiment 1, the air storage groove on the rotary joint shaft is an annular air storage groove, and in this embodiment, the air storage groove can also be a spiral groove on the basis of ensuring the communication with the assembly gap.
Embodiment 4 of the electric spindle provided by the present invention:
the difference from example 1 is mainly that: in embodiment 1, a non-contact air-tight seal structure is adopted between the cooling joint and the rotary joint shaft, and on the basis of meeting the sealing requirement, in this embodiment, a contact rotary seal structure is arranged between the cooling joint and the rotary joint shaft, and the rotary seal structure may adopt a dynamic seal commonly used in the prior art, which is not described in detail herein.
the difference from example 1 is mainly that: in embodiment 1, the communicating gap is communicated with the air storage tank through the air cavity, the air cavity is arranged on the oil cylinder cover, in the embodiment, the structure of the air cavity can be omitted, a plurality of radial through holes are arranged at the rear end of the rotary joint shaft, the outer ends of the radial through holes are communicated with the communicating gap, and the inner ends of the radial through holes are communicated with the assembling gap between the cooling joint and the central hole of the joint shaft.
Embodiment 6 of the electric spindle provided by the present invention:
it differs from example 1 mainly in that: in the embodiment 1, the front end of the striking piston is provided with the front assembly end cover for pushing the pull rod to move forward, and in the embodiment, the front assembly end cover can be omitted, and the front end of the striking piston directly pushes the pull rod to move forward.
Embodiment 7 of the electric spindle provided by the present invention:
it differs from example 1 mainly in that: in embodiment 1, the rotary joint rod and the pull rod are connected separately, in this embodiment, the rotary joint rod and the pull rod are arranged integrally, and the rear end of the pull rod is formed integrally, at this time, the front end of the rotary joint shaft can be extended forward, that is, the front end of the knife striking piston is arranged in a protruding manner, the rear end of the rotary joint rod is provided with a jack, the front end of the rotary joint shaft is correspondingly inserted into the jack on the rotary joint rod, the jack can be designed into a hexagonal hole, the front end of the rotary joint shaft is a hexagonal shaft section, the rotary joint shaft and the jack are in sealed sliding insertion in the front-back direction, and are relatively and fixedly assembled in the circumferential direction.
Embodiment 8 of the electric spindle provided by the present invention:
it differs from example 1 mainly in that: in embodiment 1, the cooling joint corresponds fixed mounting on the cylinder body of unclamping cylinder, on the basis of guaranteeing the relatively fixed assembly of cooling joint and the cylinder body of unclamping cylinder, in this embodiment, can set up the mounting bracket outward, and mounting bracket fixed mounting is on the headstock, and cooling joint fixed mounting is on the mounting bracket to sealed passing the hydro-cylinder lid is in order to extend into the cylinder body inner chamber.
the unclamping cylinder assembly in this embodiment includes a cylinder body, a unclamping piston, a rotary joint shaft, a cooling joint, and the like, and the structure thereof is the same as that of the unclamping cylinder assembly in the foregoing electric spindle embodiment 1, and details are not repeated here.
Of course, in other embodiments, the unclamping cylinder assembly in any embodiment of the embodiments 2 to 7 of the motorized spindle may also be adopted, and will not be described herein in detail.
Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. An electric spindle comprising:
the front end of the rotating shaft is used for assembling a cutter and is provided with a rotating shaft center hole;
the pull rod is movably assembled in the central hole of the rotating shaft and is provided with a central cooling channel;
the knife striking cylinder comprises a cylinder body, and a knife striking piston is movably assembled in the cylinder body along the front-back direction;
the broach elastic piece is arranged between the rotating shaft and the pull rod and is used for matching with the unclamping piston to drive the pull rod to move back and forth so as to realize the operations of loosening the broach forwards and pulling the broach backwards;
it is characterized by also comprising:
the joint mounting hole is arranged on the cutter beating piston and extends along the front-back direction;
the rotary joint shaft is rotatably assembled in the joint mounting hole through a bearing structure and synchronously moves along with the unclamping piston in the front-rear direction, and the rotary joint shaft is provided with a joint shaft center hole;
the cooling joint is fixedly arranged on the cylinder body or is fixedly arranged opposite to the cylinder body, the cooling joint is provided with a fluid output end and a fluid input end, the fluid input end is positioned outside the cylinder body, the fluid output end is positioned in the cylinder body and is inserted into the central hole of the joint shaft in a forward clearance manner, and a sealing structure is arranged between the cooling joint and the rotary joint shaft to prevent cooling liquid from overflowing;
a rotary joint rod is fixedly arranged at the rear end of the pull rod integrally or separately, and the rotary joint rod and the rotary joint shaft are in sealed sliding insertion fit in the front-rear direction and are relatively fixed in the circumferential direction so as to drive the rotary joint shaft to rotate relative to the cooling joint;
the rotary joint rod is provided with a joint rod central hole which is communicated with the joint shaft central hole and the central cooling channel.
2. The electric spindle of claim 1, wherein the sealing structure is disposed between the fluid output end and a joint shaft central bore, the sealing structure being a non-contact gas seal structure or a contact rotary dynamic sealing structure.
3. The electric spindle of claim 2, wherein when the sealing structure is a non-contact type air sealing structure, a gas storage groove is formed in the periphery of the fluid output end and/or the hole wall of the central hole of the joint shaft, the electric spindle comprises a spindle box, the cylinder body is located on the rear side of the spindle box, the rotating shaft is rotatably assembled in the spindle box through front and rear support bearings, an oil-gas lubrication passage is formed in the spindle box and used for oil-gas lubrication of the front and rear support bearings, a communication gap is reserved between the rotary joint shaft and the joint mounting hole and communicates the gas storage groove with the oil-gas lubrication passage, so that compressed oil gas is injected into the gas storage groove, and further, when the rotary joint shaft and the cooling joint rotate relatively, a gas seal is formed.
4. The electric spindle of claim 3, wherein the communication gap extends in a fore-and-aft direction, and extends forward to a front end of the unclamping piston and rearward to a rear end of the unclamping piston.
5. The electric spindle according to claim 4, wherein the cylinder body has a pressure chamber, the unclamping piston has a piston flange assembled in the pressure chamber, the pressure chamber is used for introducing driving fluid to drive the unclamping piston to move back and forth, the cylinder body is further provided with an air chamber, the air chamber is positioned at the rear side of the pressure chamber and is isolated from the pressure chamber, the rear end of the unclamping piston extends into the air chamber, and the air chamber is communicated with the air storage groove and the communication gap.
6. The motorized spindle according to claim 4, wherein the front end and the rear end of the unclamping piston are respectively fixed with an assembling end cap, the assembling end caps are in clearance fit with the rotary joint shaft, and the assembling end cap at the front end has a top pressing front end face for pushing the pull rod to move forward when the unclamping piston moves forward.
7. The electric spindle of claim 3, wherein the front ends of the spindle box and the cylinder body enclose an oil-gas chamber, the front end of the unclamping piston extends into the oil-gas chamber, and the oil-gas chamber is respectively communicated with the oil-gas lubrication passage and the communication gap.
8. The electric spindle according to any one of claims 3 to 7, wherein the air storage groove is an annular air storage groove, and a plurality of annular air storage grooves are sequentially distributed at intervals in the front-rear direction and are communicated with each other through an assembly gap between the joint shaft center hole and the fluid output end.
9. Electric spindle according to one of claims 1 to 7, characterized in that the rear end of the rotary joint shank is sealingly and slidably inserted into the joint shank central bore and is fitted fixed relative thereto in the circumferential direction.
10. A unclamping cylinder assembly for an electric spindle, comprising:
the cylinder body is fixedly arranged on the rear side of a main spindle box of the electric spindle;
the knife striking piston is assembled in the cylinder body in a guiding and moving manner along the front-back direction;
it is characterized by also comprising:
the joint mounting hole is arranged on the cutter beating piston and extends along the front-back direction;
the rotary joint shaft is rotatably assembled in the joint mounting hole through a bearing structure and synchronously moves along with the unclamping piston in the front-rear direction, and the rotary joint shaft is used for being hermetically and slidably inserted and assembled with the rear end of a rotary joint rod of the electric spindle in the front-rear direction and relatively fixedly assembled in the circumferential direction;
the rotary joint shaft is provided with a joint shaft center hole and is used for being communicated with a center cooling channel on the electric spindle pull rod through a joint rod center hole of the rotary joint rod;
the cooling joint is fixedly arranged on the cylinder body and provided with a fluid output end and a fluid input end, the fluid input end is positioned outside the cylinder body, the fluid output end is positioned inside the cylinder body and inserted into the central hole of the joint shaft in a forward clearance mode, and a sealing structure is arranged between the cooling joint and the rotary joint shaft to prevent cooling liquid from overflowing.
11. The unclamping cylinder assembly for an electric spindle according to claim 10, wherein the sealing structure is disposed between the fluid output end and a joint shaft central hole, and the sealing structure is a non-contact type gas sealing structure or a contact type rotary dynamic sealing structure.
12. The unclamping cylinder assembly as claimed in claim 11, wherein when the sealing structure is a non-contact type air-tight structure, an air reservoir is provided on the outer periphery of the fluid output end and/or the wall of the central hole of the joint shaft, a communication gap is provided between the rotary joint shaft and the joint mounting hole, the communication gap is communicated with the air reservoir, and the communication gap is used for communicating with an oil-air lubrication passage inside the main spindle box when the cylinder body is mounted on the main spindle box of the electric spindle, so that compressed oil-air is injected into the air reservoir, thereby forming an air-tight seal when the rotary joint shaft and the cooling joint relatively rotate.
13. The unclamping cylinder assembly for an electric spindle according to claim 12, wherein the communication gap extends in a front-to-rear direction, and extends forward to a front end of the unclamping piston and rearward to a rear end of the unclamping piston.
14. The unclamping cylinder assembly for an electric spindle according to claim 13, wherein the cylinder body has a pressure chamber, the piston has a piston flange fitted in the pressure chamber, the pressure chamber is used for introducing a driving fluid to drive the unclamping piston to move back and forth, the cylinder body is further provided with an air chamber, the air chamber is located at the rear side of the pressure chamber and is isolated from the pressure chamber, the rear end of the unclamping piston extends into the air chamber, and the air chamber is communicated with the air storage groove and the communication gap.
15. The unclamping cylinder assembly for an electric spindle according to claim 14, wherein the front end and the rear end of the unclamping piston are respectively fixed with an assembling end cap, the assembling end caps are in clearance fit with the rotary joint shaft, and the assembling end cap at the front end has a top pressing front end face for pushing the pull rod to move forward when the unclamping piston moves forward.
16. The unclamping cylinder assembly as claimed in any one of claims 12 to 15, wherein the air-storing groove is an annular air-storing groove, and a plurality of annular air-storing grooves are sequentially spaced in the front-rear direction and communicate with each other through an assembly gap between the central hole of the joint shaft and the fluid output end.
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| CN202010686609.4A CN112024910B (en) | 2020-07-16 | 2020-07-16 | Electric main shaft and knife striking cylinder assembly for electric main shaft |
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| CN202010686609.4A CN112024910B (en) | 2020-07-16 | 2020-07-16 | Electric main shaft and knife striking cylinder assembly for electric main shaft |
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| CN112518394B (en) * | 2020-12-08 | 2024-05-31 | 广州市昊志机电股份有限公司 | Electric spindle and machine tool for water outlet of mechanical tool changing center |
| CN112809436A (en) * | 2021-01-22 | 2021-05-18 | 东莞市巨冈机械工业有限公司 | Horizontal main shaft unclamping structure |
| CN113000868B (en) * | 2021-03-12 | 2023-07-18 | 宁波天控五轴数控技术有限公司 | Assembly for electric spindle with hydraulic cylinder and central cooling function |
| CN113798917B (en) * | 2021-09-13 | 2022-12-09 | 深圳市速锋科技股份有限公司 | Center water outlet electric spindle broach mechanism and method for detecting air tightness of inner cavity of center water outlet electric spindle broach mechanism |
| CN114571358A (en) * | 2022-03-01 | 2022-06-03 | 因那智能装备(大连)有限公司 | Main shaft with air tightness detection function and method for detecting air tightness of main shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH1133876A (en) * | 1997-07-11 | 1999-02-09 | Toyoda Mach Works Ltd | Spindle device |
| WO2009013912A1 (en) * | 2007-07-24 | 2009-01-29 | Nsk Ltd. | Spindle device |
| CN107378004B (en) * | 2017-07-12 | 2023-04-25 | 广州市昊志机电股份有限公司 | Contact type central water outlet permanent magnet synchronous electric spindle |
| DE102017008654A1 (en) * | 2017-09-14 | 2019-03-14 | Franz Kessler Gmbh | Motor spindle for a machine tool with integrated cooling and rotary feedthrough module |
| CN108927703A (en) * | 2018-08-07 | 2018-12-04 | 深圳市爱贝科精密机械有限公司 | A kind of center water yielding device of electro spindle |
| CN210451755U (en) * | 2019-08-13 | 2020-05-05 | 西安斯莱克智能系统有限公司 | Can be with dead compound main shaft of turnning and milling of pivot lock |
| CN110947981A (en) * | 2019-12-13 | 2020-04-03 | 泰安海纳轴研科技有限公司 | Novel numerical control machining center is built-in to have a sword, center goes out water permanent magnetism synchronous electric main shaft |
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