Floating device and electric spindle

Abstract

The present invention provides a floating device and an electric spindle, and relates to the field of electric spindle floating technology. The floating device includes a mounting seat, a radial floating assembly, an axial floating assembly, and a floating shaft; one end of the mounting seat is connected to the robot through the axial floating assembly, the radial floating assembly is arranged at the other end of the mounting seat, the floating shaft is inserted in the radial floating assembly, and the end of the floating shaft away from the mounting seat is connected to a spindle floating connection plate. The electric spindle includes a floating device. A technical effect with good use effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of electric spindle floating, and in particular to a floating device and an electric spindle. Background Art

[0002] With the development of Industry 4.0 (intelligent production), especially the front grinding process in the foundry industry, the grinding is difficult due to the complex and irregular structure of the castings, the surfaces, holes and edges that need to be polished are distributed around the castings.

[0003] At present, there are mainly the following methods for deburring castings: using manual grinding to remove burrs on castings has the disadvantages of low production efficiency and high labor intensity; using a fixed trajectory of a manipulator to remove burrs has the disadvantages that the manipulator can only grind the burrs on the castings in a fixed manner, and will not automatically remove the burrs on the castings as the shape of the castings changes, which is easy to damage the castings during deburring. Since the deformation of the castings and the size of the burrs often deviate from the ideal state, problems such as overcutting the workpiece surface or the burrs cannot be removed are caused, and the deburring effect does not meet the requirements, which is not conducive to subsequent processing. If the castings are changed, the operating program of the manipulator must be modified to deburr the castings; using a special machine tool to remove burrs on castings according to a fixed trajectory also has the above problems. When the actual contour of the workpiece deviates from the ideal contour size, the tool is easy to cut into the workpiece body, resulting in overcutting of the workpiece.

[0004] Therefore, providing a floating device and an electric spindle with good use effect has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a floating device and an electric spindle to alleviate the technical problem of poor use effect of the electric spindle in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides a floating device, including a mounting seat, a radial floating assembly, an axial floating assembly and a floating shaft;

[0007] One end of the mounting seat is connected to the robot through the axial floating component, the radial floating component is arranged at the other end of the mounting seat, the floating shaft is inserted in the radial floating component, and the end of the floating shaft away from the mounting seat is connected to the spindle floating connecting plate.

[0008] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the axial floating assembly comprises an axial piston and a first elastic member;

[0009] The mounting seat is provided with a cylinder for mounting the axial piston. One end of the first elastic member abuts against the axial piston, and the other end abuts against the bottom surface of the cylinder.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the axial floating assembly further includes a stopper and a connecting plate for connecting the electric spindle;

[0011] The limiting member and the axial piston are both connected to the connecting plate.

[0012] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned limiting member adopts a limiting plate;

[0013] The limiting plate is fixedly connected to the mounting seat;

[0014] The mounting seat is provided with a first mounting hole, the limiting plate is provided with a second mounting hole corresponding to the first mounting hole, and the inner diameter of the second mounting hole is smaller than the inner diameter of the first mounting hole;

[0015] A connecting shaft is arranged in the first mounting hole, and a limiting ring is arranged at one end of the connecting shaft inserted into the first mounting hole, and the outer diameter of the limiting ring is larger than the inner diameter of the second mounting hole.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the floating device further includes an adapter plate and a main shaft flange;

[0017] The spindle flange is connected to the connecting plate through the adapter plate.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the radial floating assembly comprises a hinge, a floating seat, a gas sealing end cover, a radial piston and a thrust sleeve;

[0019] One end of the floating shaft is hinged to the mounting seat through the hinge;

[0020] The floating seat is arranged at one end of the mounting seat away from the axial floating assembly, the thrust sleeve is arranged on the floating shaft, and the thrust sleeve is located in the floating seat, the gas sealing end cover is sleeved on the floating seat, and the gas sealing end cover is fixedly connected to the mounting seat;

[0021] The outer wall of the floating seat is provided with an air supply groove, the air supply groove and the air sealing end cover are combined to form an annular air supply channel, and the air sealing end cover is provided with an air supply port for supplying air to the air supply channel;

[0022] The floating seat is provided with a plurality of piston mounting holes for mounting the radial piston, and a ball is abutted between one end of the radial piston extending into the piston mounting and the thrust sleeve.

[0023] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a plurality of through holes corresponding to the radial pistons are provided on the gas sealing end cover, a second elastic member is provided in the through hole, and a sealing plug is sealed on the through hole;

[0024] One end of the second elastic member abuts against the radial piston, and the other end abuts against the sealing plug.

[0025] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a plurality of abutment seats are provided on the thrust sleeve, and a plurality of radial pistons and a plurality of the abutment seats are evenly distributed along the circumference of the thrust sleeve.

[0026] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the hinge comprises a ball sleeve and a ball seat;

[0027] The mounting seat is provided with a receiving groove for mounting the floating shaft, the ball seat is fixedly arranged in the receiving groove, the ball sleeve is sleeved on the floating shaft, the ball sleeve is arranged in the ball seat, and the ball sleeve can rotate relative to the ball seat.

[0028] In a second aspect, an embodiment of the present invention provides an electric spindle, comprising the floating device.

[0029] Beneficial effects:

[0030] An embodiment of the present invention provides a floating device, including a mounting seat, a radial floating assembly, an axial floating assembly and a floating shaft; one end of the mounting seat is connected to the robot through the axial floating assembly, the radial floating assembly is arranged at the other end of the mounting seat, the floating shaft is inserted in the radial floating assembly, and the end of the floating shaft away from the mounting seat is connected to a spindle floating connecting plate.

[0031] Specifically, when in use, the shaft end of the electric spindle is connected to the spindle floating connecting plate of the radial floating assembly, and then the electric spindle is connected to the robot through the axial floating assembly, and then the electric spindle is floated axially and radially through the axial floating assembly and the radial floating assembly, so that the floating shaft is in a vertical state when not affected by external force, and can float radially or axially when affected by external force, so that the spindle floating connecting plate can float when affected by the workpiece force, so that the tool and the workpiece can be kept in fit within a certain deviation range, and the contact force between the tool and the workpiece is also kept constant, so that the tool can follow the contour for processing, and the cutting amount is relatively uniform, thereby improving the effect of burr removal.

[0032] The embodiment of the present invention provides an electric spindle, including a floating device. Compared with the prior art, the electric spindle has the above advantages, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a floating device provided by an embodiment of the present invention;

[0035] Figure 2 An exploded schematic diagram of a floating device provided by an embodiment of the present invention;

[0036] Figure 3 A front view of a floating device provided by an embodiment of the present invention;

[0037] Figure 4 for Figure 3 Sectional view of AA in the middle;

[0038] Figure 5 for Figure 3 Cross-sectional view of BB.

[0039] icon:

[0040] 100-mounting seat; 110-cylinder;

[0041] 200- radial floating assembly; 211- ball sleeve; 212- ball seat; 220- floating seat; 221- air supply groove; 230- air sealing end cover; 231- air supply port; 240- radial piston; 250- thrust sleeve; 260- ball; 270- second elastic member; 280- sealing plug;

[0042] 300-axial floating assembly; 310-axial piston; 320-first elastic member; 330-limiting member; 340-connecting plate; 350-connecting shaft; 360-limiting ring;

[0043] 400- floating shaft;

[0044] 500-spindle floating connection plate;

[0045] 600-adapter board;

[0046] 700-Spindle flange. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0052] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, an embodiment of the present invention provides a floating device, including a mounting seat 100, a radial floating assembly 200, an axial floating assembly 300 and a floating shaft 400; one end of the mounting seat 100 is connected to the robot through the axial floating assembly 300, the radial floating assembly 200 is arranged at the other end of the mounting seat 100, the floating shaft 400 is inserted into the radial floating assembly 200, and the end of the floating shaft 400 away from the mounting seat 100 is connected to the main shaft floating connection plate 500.

[0053] Specifically, when in use, the shaft end of the electric spindle is connected to the spindle floating connecting plate 500 of the radial floating component 200, and then the electric spindle is connected to the robot through the axial floating component 300, and then the electric spindle is floated axially and radially through the axial floating component 300 and the radial floating component 200, so that the floating shaft 400 is in a vertical state when not affected by external force, and can float radially or axially when affected by external force, so that the spindle floating connecting plate 500 can float when affected by the workpiece force, so that the tool and the workpiece can be kept in contact within a certain deviation range, and the contact force between the tool and the workpiece is also kept constant, so that the tool can follow the contour for processing, and the cutting amount is relatively uniform, thereby improving the effect of burr removal.

[0054] Specifically, when the electric spindle is connected to the robot through the floating device provided by the present invention, both the radial floating assembly 200 and the axial floating assembly 300 can float axially or radially according to the force exerted on the floating shaft 400, so that the electric spindle can float accordingly, thereby improving the use effect of the electric spindle.

[0055] See also Figure 2 , Figure 4 and Figure 5 As shown, in an optional scheme of this embodiment, the axial floating assembly 300 includes an axial piston 310 and a first elastic member 320; a cylinder 110 for mounting the axial piston 310 is provided on the mounting seat 100, one end of the first elastic member 320 abuts against the axial piston 310, and the other end abuts against the bottom surface of the cylinder 110.

[0056] Specifically, the mounting seat 100 is provided with a cylinder 110, the axial piston 310 is inserted in the cylinder 110, and a sleeve is provided in the cylinder 110. The provision of the sleeve can reduce the friction between the axial piston 310 and the cylinder 110, and the sleeve can be easily replaced after being damaged by friction, without replacing the mounting seat 100, thereby reducing costs. The mounting seat 100 is provided with an air port for supplying air to the cylinder 110.

[0057] Among them, a first elastic member 320 is arranged between the axial piston 310 and the cylinder 110, and one end of the first elastic member 320 abuts against the axial piston 310, and the other end abuts against the cylinder 110. The first elastic member 320 provides a preload force for the axial piston 310. When the main shaft is subjected to axial force transmitted to the floating shaft 400, the mounting seat 100 will move toward the robot, thereby compressing the first elastic member 320, thereby realizing axial floating.

[0058] Among them, when the axial piston 310 is connected to the robot, the first elastic member 320 can be fixedly connected to the cylinder 110 and the axial piston 310 to prevent the axial piston 310 from falling off from the cylinder 110, or through other limiting structures, as long as the axial piston 310 can be prevented from falling off from the cylinder 110.

[0059] The first elastic member 320 is a spring, and a guide column is provided on the cylinder 110. The spring is sleeved on the guide column. The guide column is provided to prevent the spring from being twisted due to force, thereby ensuring the normal operation of the spring.

[0060] See also Figure 2 , Figure 4 and Figure 5 As shown, in an optional solution of this embodiment, the axial floating assembly 300 further includes a limiter 330 and a connecting plate 340 for connecting the electric spindle, and the limiter 330 and the axial piston 310 are both connected to the connecting plate 340 .

[0061] Specifically, the axial piston 310 is limited by the limiter 330 to prevent the axial piston 310 from being separated from the cylinder 110. In addition, the limiter 330 and the axial piston 310 are both connected to the connecting plate 340, and the limiter 330 limits the movement range of the connecting plate 340, thereby limiting the axial piston 310.

[0062] See also Figure 2 , Figure 4 and Figure 5 As shown, in the optional scheme of this embodiment, the limit member 330 adopts a limit plate; the limit plate is fixedly connected to the mounting base 100; a first mounting hole is opened on the mounting base 100, and a second mounting hole corresponding to the first mounting hole is opened on the limit plate, and the inner diameter of the second mounting hole is smaller than the inner diameter of the first mounting hole; a connecting shaft 350 is arranged in the first mounting hole, and a limit ring 360 is arranged at one end of the connecting shaft 350 inserted into the first mounting hole, and the outer diameter of the limit ring 360 is larger than the inner diameter of the second mounting hole.

[0063] Specifically, the limit plate is fixed to the mounting base 100 by screws, and a first mounting hole is opened on the mounting base 100, and a second mounting hole is opened on the limit plate. When installing the limit plate, the first mounting hole and the second mounting hole correspond to each other; when installing the limit plate, first install the limit ring 360 on the connecting shaft 350, and then insert the two into the first mounting hole, and then install the limit plate on the mounting base 100. When installing the limit plate, the connecting shaft 350 will extend out of the second mounting hole, and the connecting shaft 350 can drive the limit ring 360 to reciprocate in the first mounting hole, and because the outer diameter of the limit ring 360 is larger than the inner diameter of the second mounting hole, the limit ring 360 cannot be detached from the first mounting hole.

[0064] The limiting ring 360 can be fixed to the connecting shaft 350 by screws, and a sleeve is provided in the first mounting hole, and the sleeve is used to reduce the friction between the connecting shaft 350 and the first mounting hole, and reduce the wear of the connecting shaft 350. The outer diameter of the sleeve is greater than the inner diameter of the second mounting hole.

[0065] It should be noted that the connecting shaft 350 and the axial piston 310 are both connected to the connecting plate 340 via screws.

[0066] See also Figure 2 , Figure 4 and Figure 5 As shown, in an optional solution of this embodiment, the floating device further includes an adapter plate 600 and a main shaft flange 700 ; the main shaft flange 700 is connected to the connecting plate 340 via the adapter plate 600 .

[0067] Specifically, the adapter plate 600 is connected to the main shaft flange 700 by screws, and the screw-in direction of the screws is the axial direction of the adapter plate 600; the adapter plate 600 is connected to the connecting plate 340 by screws, and the screw-in direction of the screws is the radial direction of the adapter plate 600. A groove is provided on the connecting plate 340. When the adapter plate 600 is connected to the connecting plate 340, the adapter plate 600 can be embedded in the groove.

[0068] See also Figure 2 , Figure 4 and Figure 5As shown, in the optional scheme of this embodiment, the radial floating assembly 200 includes a hinge, a floating seat 220, a gas seal end cover 230, a radial piston 240 and a thrust sleeve 250; one end of the floating shaft 400 is hinged to the mounting seat 100 through a hinge; the floating seat 220 is arranged at an end of the mounting seat 100 away from the axial floating assembly 300, the thrust sleeve 250 is arranged on the floating shaft 400, and the thrust sleeve 250 is located in the floating seat 220, and the gas seal end cover 230 is sleeved on the floating seat 220. Cover 230, and the air-sealing end cover 230 is fixedly connected to the mounting seat 100; an air supply groove 221 is provided on the outer wall of the floating seat 220, and the air supply groove 221 and the air-sealing end cover 230 are combined to form an annular air supply channel, and an air supply port 231 for supplying air to the air supply channel is provided on the air-sealing end cover 230; a plurality of piston mounting holes for mounting the radial piston 240 are provided on the floating seat 220, and a ball 260 is abutted between one end of the radial piston 240 extending into the piston mounting and the thrust sleeve 250.

[0069] Specifically, one end of the floating shaft 400 is disposed on the mounting seat 100 through a hinge, and one end of the floating shaft 400 can swing relative to the mounting seat 100 .

[0070] In addition, the floating seat 220 is arranged at one end of the mounting seat 100 away from the axial floating assembly 300, the air-sealing end cover 230 is buckled on the floating seat 220, and the air-sealing end cover 230 is fixedly connected to the mounting seat 100, and the floating seat 220 is fixed by the air-sealing end cover 230 and the mounting seat 100. The outer wall of the floating seat 220 is provided with an air supply groove 221, and sealing rings are provided above and below the air supply groove 221, so that the air supply groove 221 and the air-sealing end cover 230 are combined to form an air supply channel, and the air-sealing end cover 230 is provided with an air supply port 231 for supplying air to the air supply channel.

[0071] Among them, a thrust sleeve 250 is provided inside the floating seat 220, and there is a certain distance between the thrust sleeve 250 and the floating group, a plurality of piston mounting holes are provided on the floating seat 220, the radial piston 240 is installed in the piston mounting hole, and a ball 260 is provided between the radial piston 240 and the thrust sleeve 250, and a plurality of abutment seats are provided on the thrust sleeve 250, and the plurality of radial pistons 240 and the plurality of abutment seats are evenly distributed along the circumference of the thrust sleeve 250. When air is supplied in the air supply channel, the plurality of pistons receive equal gas thrust, so the plurality of pistons can push the thrust sleeve 250 to ensure stability. When the floating shaft 400 is not subjected to radial external force, the floating shaft 400 can maintain a vertical state. When the floating shaft 400 is subjected to radial external force, radial deflection will occur, and at this time, the floating shaft 400 rotates with the hinge as the center of the circle.

[0072] Among them, the size of the floating force can be adjusted by adjusting the air pressure in the air supply channel. When the air pressure in the air supply channel is high, the floating shaft 400 needs to be subjected to a large radial force to float; when the air pressure in the air supply channel is high, the floating shaft 400 needs to be subjected to a large radial force to float.

[0073] See also Figure 2 , Figure 4 and Figure 5 As shown, in an optional scheme of the present embodiment, a plurality of through holes corresponding to the radial piston 240 are opened on the air-sealing end cover 230, a second elastic member 270 is arranged in the through hole, and a sealing plug 280 is sealed on the through hole; one end of the second elastic member 270 abuts against the radial piston 240, and the other end abuts against the sealing plug 280.

[0074] Specifically, a through hole is opened on the air-sealing end cover 230. When installing the radial piston 240, the second elastic member 270 can be inserted into the through hole, and then the through hole is blocked by the sealing plug 280. At this time, one end of the second elastic member 270 abuts against the radial piston 240, and the other end abuts against the sealing plug 280. The setting of the second elastic member 270 provides a pre-tightening force for the radial piston 240.

[0075] The second elastic member 270 is a spring.

[0076] The sealing plug 280 may be a thread plug in combination with a sealant.

[0077] See also Figure 2 , Figure 4 and Figure 5 As shown, in an optional scheme of this embodiment, the hinge includes a ball sleeve 211 and a ball seat 212; a receiving groove for installing the floating shaft 400 is opened on the mounting seat 100, the ball seat 212 is fixedly arranged in the receiving groove, the ball sleeve 211 is sleeved on the floating shaft 400, the ball sleeve 211 is arranged in the ball seat 212, and the ball sleeve 211 can rotate relative to the ball seat 212.

[0078] Specifically, a receiving groove is provided on the mounting seat 100. During assembly, the ball sleeve 211 is first sleeved on the floating shaft 400, and then a baffle is fixed at the bottom of the floating shaft 400 to fix the ball sleeve 211 on the floating shaft 400 to prevent the ball sleeve 211 from sliding freely. The ball sleeve 211 is then connected with the ball seat 212, and the ball seat 212 is then placed in the receiving groove. A pressure ring is then set to fix the ball seat 212, and then the floating seat 220 and other components are installed.

[0079] A rectangular through hole is provided in the ball sleeve 211, and one end of the floating shaft 400 is set to be rectangular to facilitate cooperation with the ball sleeve 211. A limiting platform is provided on the floating shaft 400, and the ball sleeve 211 is fixed on the floating shaft 400 through the cooperation of the limiting platform and the baffle.

[0080] Specifically, the floating device provided in this embodiment, the axial floating component 300 and the radial floating component 200 are independent of each other, and two different air pressures are applied axially and radially. The radial air pressure enters the annular cylinder 110, so that the six pistons arranged in an array can obtain equal pressure to push the middle floating shaft 400. The floating shaft 400 is in a vertical state when not affected by external forces. When subjected to external forces, it can float with an offset of 5° around the joint bearing as a fulcrum.

[0081] Axial air pressure enters the cylinder 110, pushing the middle piston to generate an outward pressure. The piston is fixed on the piston base, and the piston base is restricted by three evenly distributed guide rods, so that the entire floating device has a floating amount of 5 mm in the axial direction.

[0082] This embodiment provides an electric spindle, including a floating device.

[0083] Specifically, the electric spindle has the above advantages compared with the prior art, which will not be described in detail here.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A floating device, characterized in that: include: A mounting seat (100), a radial floating assembly (200), an axial floating assembly (300) and a floating shaft (400); One end of the mounting seat (100) is connected to the robot via the axial floating assembly (300); the radial floating assembly (200) is arranged at the other end of the mounting seat (100); the floating shaft (400) is inserted into the radial floating assembly (200); and one end of the floating shaft (400) away from the mounting seat (100) is connected to a spindle floating connection plate (500); The radial floating assembly (200) comprises a hinge, a floating seat (220), a gas-sealing end cover (230), a radial piston (240) and a thrust sleeve (250); one end of the floating shaft (400) is hinged to the mounting seat (100) via the hinge; the floating seat (220) is arranged at one end of the mounting seat (100) away from the axial floating assembly (300); the thrust sleeve (250) is arranged on the floating shaft (400), and the thrust sleeve (250) is located inside the floating seat (220); the gas-sealing end cover (230) is sleeved on the floating seat (220). ), and the gas sealing end cover (230) is fixedly connected to the mounting seat (100); an air supply groove (221) is provided on the outer wall of the floating seat (220), the air supply groove (221) and the gas sealing end cover (230) are combined to form an annular air supply channel, and the gas sealing end cover (230) is provided with an air supply port (231) for supplying air to the air supply channel; a plurality of piston mounting holes for mounting the radial piston (240) are provided on the floating seat (220), and a ball (260) is abutted between one end of the radial piston (240) extending into the piston mounting hole and the thrust sleeve (250); The gas sealing end cover (230) is provided with a plurality of through holes corresponding to the radial piston (240), a second elastic member (270) is arranged in the through hole, and a sealing plug (280) is sealed on the through hole; one end of the second elastic member (270) abuts against the radial piston (240), and the other end abuts against the sealing plug (280); The second elastic member (270) can provide a pre-tightening force for the radial piston (240); The axial floating assembly (300) comprises an axial piston (310) and a first elastic member (320); a cylinder (110) for mounting the axial piston (310) is provided on the mounting seat (100); one end of the first elastic member (320) abuts against the axial piston (310), and the other end abuts against the bottom surface of the cylinder (110).

2. The floating device according to claim 1, characterized in that: The axial floating assembly (300) further comprises a stopper (330) and a connecting plate (340) for connecting to the electric spindle; The limiting member (330) and the axial piston (310) are both connected to the connecting plate (340).

3. The floating device according to claim 2, characterized in that: The limiting member (330) is a limiting plate; The limiting plate is fixedly connected to the mounting seat (100); The mounting seat (100) is provided with a first mounting hole, the limiting plate is provided with a second mounting hole corresponding to the first mounting hole, and the inner diameter of the second mounting hole is smaller than the inner diameter of the first mounting hole; A connecting shaft (350) is arranged in the first mounting hole, and a limiting ring (360) is arranged at one end of the connecting shaft (350) inserted into the first mounting hole, and the outer diameter of the limiting ring (360) is greater than the inner diameter of the second mounting hole.

4. The floating device according to claim 3, characterized in that: Also includes an adapter plate (600) and a spindle flange (700); The main shaft flange (700) is connected to the connecting plate (340) via the adapter plate (600).

5. The floating device according to claim 1, characterized in that: The thrust sleeve (250) is provided with a plurality of abutment seats, and the plurality of radial pistons (240) and the plurality of abutment seats are evenly distributed along the circumference of the thrust sleeve (250).

6. The floating device according to claim 1, characterized in that: The hinged component comprises a ball sleeve (211) and a ball seat (212); The mounting seat (100) is provided with a receiving groove for mounting the floating shaft (400); the ball seat (212) is fixedly arranged in the receiving groove; the ball sleeve (211) is sleeved on the floating shaft (400); the ball sleeve (211) is arranged in the ball seat (212), and the ball sleeve (211) can rotate relative to the ball seat (212).

7. An electric spindle, characterized in that: A floating device comprising any one of claims 1-6.

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