CN215847602U - Floating deburring structure for grinding device - Google Patents

Abstract

The utility model relates to the technical field of polishing devices, in particular to a floating deburring structure used on a polishing device, which comprises an electric spindle and a shell sleeved outside the electric spindle, wherein a ventilation fixed cover plate is fixed on the shell, an outer sealing ring and an inner sealing ring are clamped between the shell and the ventilation fixed cover plate to form an annular sealed cavity structure, a plurality of air cylinders communicated with the sealed cavity structure are arranged on the shell, pistons are connected in the air cylinders in a sliding manner, a floating outer ring is fixed on the shell, a floating ring is sleeved on the electric spindle, a plurality of upper steel balls corresponding to the pistons are rotatably arranged on the upper side of the floating ring, side steel balls are rotatably connected to the outer side end face of the floating ring, the side steel balls are slidably connected in a strip-shaped limiting groove arranged on the inner end face of the floating outer ring, and the utility model realizes the deflection and axial movement of the electric spindle, avoid the rigid cutter to break or the part is destroyed, have extensive application prospect in grinding device technical field.

Description

Floating deburring structure for grinding device

Technical Field

The utility model relates to the technical field of polishing devices, in particular to a floating deburring structure for a polishing device.

Background

In the field of traditional robot polishing, a motion track is usually set for an industrial robot, so that polishing of the outer contour of a workpiece is realized through the industrial robot. Before grinding, off-line programming is needed according to geometric data of the workpiece appearance, so that a motion track of the robot in the grinding process is generated, and after the motion track is generated, subsequent workpiece grinding work is carried out according to the motion track. However, since each workpiece has a certain difference from the original designed outline dimension during the production and forming process, the outlines of the workpieces are not completely the same, in this case, uneven grinding occurs if grinding is performed according to the completely same motion track, that is: when the workpiece is in a position with a large outer contour depression, the polishing quality is affected because the polishing head cannot polish the workpiece; when the workpiece is in a position with a large outer contour protrusion, the polishing head is suddenly stressed too much, the workpiece is easily damaged or a rigid polishing cutter connected with an electric spindle is broken, and the working efficiency and the polishing quality are seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a floating deburring structure for a polishing device, which aims to solve the problems that in the prior art, the polishing quality is influenced by large outer contour depression on a workpiece, and the work efficiency and the polishing quality are seriously influenced by the damage of the workpiece or the breakage of a rigid polishing cutter connected with an electric spindle easily caused by large outer contour protrusion on the workpiece.

The utility model adopts the technical scheme that the electric spindle comprises an electric spindle and a shell sleeved outside the electric spindle, and is characterized in that a ventilation fixing cover plate is fixed at the upper end of the shell, a first clamping groove and a second clamping groove are formed in the end surface of the shell, which is close to the ventilation fixing cover plate, and an outer sealing ring and an inner sealing ring are respectively clamped in the first clamping groove and the second clamping groove, so that an annular sealing cavity structure is formed among the shell, the ventilation fixing cover plate, the outer sealing ring and the inner sealing ring, an upper vent hole and a side vent hole which are communicated with the sealing cavity structure are formed in the upper end surface and the side end surface of the ventilation fixing cover plate, a plurality of cylinders uniformly arranged in an annular shape are formed in the shell, the cylinders are communicated with the sealing cavity structure through communicating holes, pistons are connected in the cylinders in a sliding manner, a floating outer ring is fixed at the lower end of the shell, and a floating ring is sleeved on the electric spindle in the floating outer ring, the upper end face of the floating ring is provided with a placement groove, a plurality of upper steel balls corresponding to the vertical direction of the piston are arranged in the placement groove, a plurality of rotating grooves which are uniformly arranged in an annular array are formed in the end face of the outer side of the floating ring, side steel balls are rotatably connected in the rotating grooves, a plurality of strip-shaped limiting grooves are formed in the inner end face of the floating outer ring, the side steel balls are connected in the strip-shaped limiting grooves in a sliding mode, an expansion sleeve is fixed on an electric spindle at the lower end of the floating ring, and a locking limiting ring is sleeved on the expansion sleeve.

Preferably, an upper flange cover is fixed on the ventilation fixing cover plate, an upper protective sleeve sleeved outside the electric spindle is fixedly clamped on the upper flange cover, a lower flange cover is fixed at the lower end of the floating outer ring, a lower protective sleeve sleeved outside the electric spindle is fixed on the lower flange cover, and the upper protective sleeve and the lower protective sleeve are both in a circular truncated cone shape made of flexible materials.

Preferably, a wear-resistant ventilation ring is fixed in the housing, a plurality of telescopic holes corresponding to the cylinders are formed in the wear-resistant ventilation ring, one end of the piston penetrates through the wear-resistant ventilation ring through the telescopic holes, a plurality of inner ventilation grooves communicating a gap between the cylinder and the electric spindle with the housing are formed in the upper end face of the wear-resistant ventilation ring, a plurality of upper ventilation grooves communicating the outside with a gap between the electric spindle and the upper flange cover are formed in the end face of the upper flange cover close to the ventilation fixing cover plate, and a plurality of lower ventilation grooves communicating the outside with a gap between the electric spindle and the lower flange cover are formed in the end face of the lower flange cover close to the floating outer ring.

Preferably, the vertical section of the piston is T-shaped, a side clamping groove is formed in the outer side end face of one end, close to the communicating hole, of the piston, and a sealing ring is clamped in the side clamping groove.

Preferably, a steel ball fixing plate is fixed in the placing groove, a limiting hole is formed in the steel ball fixing plate, and the upper steel ball part penetrates through the limiting hole and extends out of the steel ball fixing plate.

Preferably, a floating groove is formed in the floating outer ring, the floating ring is arranged in the floating groove, and the strip-shaped limiting groove is formed in the side wall of the floating groove.

Preferably, the rotating groove is conical, and the strip-shaped limiting groove is semi-cylindrical.

Preferably, the locking limit ring is fixedly connected to the floating ring, the whole vertical section and the inner ring vertical section of the locking limit ring are both in a T shape, the expansion sleeve is connected to the inner ring of the locking limit ring in an interference manner, the maximum diameter of the locking limit ring is larger than the diameter of the lower opening of the floating outer ring, and a structure for limiting the deflection angle and the axial movement length of the electric spindle through the matching of the locking limit ring and the floating ring is formed.

Preferably, the electric spindle comprises a spindle housing, a drive motor, a plug, a rotor and a positioning bearing, the expansion sleeve is fixed on the end face of the outer side of the driving motor, a mounting hole is arranged at one end of the driving motor, which extends to form an output shaft, the inner end surface of the mounting hole close to the opening is provided with an internal thread, one end of the spindle shell extends to form a threaded connector, the threaded connector is in threaded connection with the internal thread, a clamping groove is arranged in the threaded connector, the positioning bearing is fixed in the clamping groove, one end of the rotor penetrates through the main shaft shell along the axis of the main shaft shell, and is connected on the positioning bearing in the clamping groove in an interference manner, one end of the rotor close to the driving motor is provided with a non-circular inserting groove, the plug is fixed on the output shaft of the driving motor, the plug is plugged in the plug groove, and a sealing cover is fixed at one end of the main shaft shell, which is far away from the driving motor.

By adopting the technical scheme of the utility model, the following beneficial effects (1) can be achieved that the piston and the floating ring are conveniently limited in the inner part through the upper flange cover, the ventilating fixed cover plate, the lower flange cover, the shell and the floating outer ring, and further the main shaft deviation effect is realized; (2) an annular sealing cavity structure is formed among the outer shell, the ventilation fixed cover plate, the outer sealing ring and the inner sealing ring through the outer sealing ring, the inner sealing ring, the piston, the upper ventilation hole, the side ventilation hole and the communication hole, and then gas is conveyed through the upper ventilation hole or the side ventilation hole to increase the air pressure in the sealing cavity structure so as to realize that the piston moves up and down in the cylinder; (3) through the floating ring, the upper steel ball, the side steel ball and the strip-shaped limiting groove, the floating ring can only slide along the strip-shaped limiting groove under the driving of the side steel ball, so that the upper steel ball is abutted against the piston, the electric spindle is convenient to be limited by matching with the piston when the electric spindle deflects and axially moves, the electric spindle can have a certain deflection amount, and meanwhile, the electric spindle cannot be deflected in a transition manner, so that the electric spindle can be prevented from driving a polishing head to polish workpieces unevenly, or the workpieces are prevented from being damaged or a rigid polishing cutter connected with the electric spindle is prevented from breaking; (4) through the matching of the floating ring and the locking limiting ring, the distance that the electric spindle drives the floating ring to axially move is convenient to limit, and the deflection angle is good, so that the polishing effect of the workpiece is prevented from being influenced by the transition axial movement and deflection of the polishing head driven by the electric spindle; the technical scheme of the utility model has wide application prospect in the technical field of polishing devices.

Drawings

Fig. 1 is a front view of a floating deburring structure for use in a grinding apparatus in accordance with the present invention.

Fig. 2 is a cross-sectional view taken along line P-P in fig. 1.

Fig. 3 is an enlarged view of the area a in fig. 2.

Fig. 4 is an enlarged view of the region B in fig. 2.

Fig. 5 is an enlarged view of the region C in fig. 2.

Wherein, 1, an electric spindle, 2, a shell, 3, a ventilation fixed cover plate, 4, an upper flange cover, 5, an upper protective sleeve, 6, a floating outer ring, 7, a locking limit ring, 8, a lower flange cover, 9, a lower protective sleeve, 10, a first clamping groove, 11, an outer sealing ring, 12, a second clamping groove, 13, an inner sealing ring, 14, a communication hole, 15, a cylinder, 16, a piston, 17, a side clamping groove, 18, a sealing ring, 19, a wear-resisting ventilation ring, 20, a telescopic hole, 21, a floating ring, 22, a strip-shaped limit groove, 23, a rotating groove, 24, a side steel ball, 25, a placing groove, 26, an upper steel ball, 27, a steel ball fixing plate, 28, a limit hole, 29, an upper ventilation hole, 30, a side ventilation hole, 31, a robot connecting plate, 32, an expansion sleeve, 33, a floating groove, 34, an inner ventilation groove, 35, an upper ventilation groove, 36, a lower ventilation groove, 101, a driving motor, 102 and a mounting hole, 103. the sealing device comprises internal threads 104, a main shaft shell 105, a threaded connector 106, a rotor 107, a plug groove 108, a plug connector 109, a clamping groove 110, a positioning bearing 111 and a sealing cover.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without any creative effort belong to the protection scope of the present invention, and in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance in the description of the present invention, it being noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

1-5, including electric main shaft 1 and the shell 2 of cover outside electric main shaft 1, the upper end of shell 2 can be dismantled through bolt fastening and be connected with the fixed apron 3 of ventilating, can dismantle through bolt fastening and be connected with upper flange cover 4 on the fixed apron 3 of ventilating, the lower extreme of shell 2 can be dismantled through bolt fastening and be connected with unsteady outer loop 6, the lower extreme of unsteady outer loop 6 can be dismantled through bolt fastening and be connected with lower flange cover 8, be convenient for to ventilate fixed apron 3, upper flange cover 4, shell 2, unsteady outer loop 6 and lower flange cover 8 link together and form a whole, and then the cover is established outside electric main shaft 1, realize injecing and protecting internal component, so that electric main shaft 1 can disperse the deflection for above-mentioned part, and then realize better polishing effect. The shell 2 has been seted up first draw-in groove 10 and second draw-in groove 12 on being close to the terminal surface of the fixed apron 3 of ventilating, the joint has outer seal ring 11 and interior sealing ring 13 in first draw-in groove 10 and the second draw-in groove 12 respectively, be convenient for inject outer seal ring 11 and interior sealing ring 13 through first draw-in groove 10 and second draw-in groove 12 joint, avoid outer seal ring 11 and interior sealing ring 13 to warp, make the shell 2 simultaneously, ventilate fixed apron 3, form annular seal chamber structure between outer seal ring 11 and the interior sealing ring 13. The upper end face and the side end face of the ventilation fixing cover plate 3 are provided with an upper ventilation hole 29 and a side ventilation hole 30 which are communicated with the sealed cavity structure, so that air can be conveniently conveyed into the sealed cavity structure through the upper ventilation hole 29 and the side ventilation hole 30, and the pressure intensity in the sealed cavity structure can be further adjusted. The shell 2 is provided with a plurality of cylinders 15 which are uniformly arranged in an annular shape, and the cylinders 15 are communicated with the sealed cavity structure through the communication holes 14, so that the air pressure in the cylinders 15 is kept the same as that of the sealed cavity structure. A piston 16 is connected in the cylinder 15 in a sliding mode, the vertical section of the piston 16 is T-shaped, a side clamping groove 17 is formed in the end face of the outer side of one end, close to the communicating hole 14, of the piston 16, a sealing ring 18 is connected in the side clamping groove 17 in a clamping mode, the sealing ring 18 is conveniently connected with the sealing ring 18 in a clamping mode through the side clamping groove 17, the sealing ring 18 is prevented from being separated from the piston 16, meanwhile, a gap between the piston 16 and the side wall of the cylinder 15 is sealed through the sealing ring 18, and therefore the piston 16 can slide in the cylinder 15 conveniently by changing air pressure in the sealing cavity. Can dismantle through bolt fastening in the shell 3 and be connected with wear-resisting ventilative ring 19, seted up a plurality of telescopic holes 20 corresponding with cylinder 15 on the wear-resisting ventilative ring 19, wear-resisting ventilative ring 19 is run through telescopic holes 20 to the one end of piston 16 for wear-resisting ventilative ring 19 links together with shell 2, utilizes telescopic holes 20 cooperation cylinder 15 to be convenient for inject piston 16 simultaneously, prevents that 16 emergence 16 from deflecting when piston 16 slides in cylinder 15. The lower extreme of shell 2 passes through bolt fastening can be dismantled and is connected with unsteady outer loop 6, the cover is equipped with floating ring 21 on the electricity main shaft 1 in the unsteady outer loop 6, the arrangement groove 25 has been seted up to floating ring 21's up terminal surface, be provided with a plurality of last steel ball 26 corresponding with the vertical direction of piston 16 in the arrangement groove 25, be convenient for make when electricity main shaft 1 drives floating ring 21 and deflect go up steel ball 26 and piston 16 inconsistent, and then make the ascending steel ball 26 that goes up in this deflection direction promote piston 16 and remove in the cylinder, and then utilize the atmospheric pressure of sealed cavity structure and cylinder to prescribe a limit to the deflection angle of floating ring 21, avoid electricity main shaft 1 to drive floating ring 21 transition deflection, and utilize rolling last steel ball 26 reduce when floating ring 21 deflects and the frictional force between the piston 16. The steel ball fixing plate 27 is detachably connected in the placing groove 25 through bolt fixing, a limiting hole 28 is formed in the steel ball fixing plate 27, the upper steel ball 26 partially penetrates through the limiting hole 28 and extends out of the steel ball fixing plate 27, the upper steel ball 26 is convenient to place through the placing groove 25, the upper steel ball 26 is limited by the steel ball fixing plate 27, and the situation that the upper steel ball 26 moves randomly in the placing groove 25 to affect and abut against the piston 16 is avoided.

As shown in fig. 1-5, in the floating deburring structure for a polishing device, a plurality of rotating grooves 23 are formed in an annular uniform array on the outer end surface of a floating ring 21, side steel balls 24 are rotatably connected in the rotating grooves 23, a plurality of strip-shaped limiting grooves 22 are formed in the inner end surface of a floating outer ring 6 along the length direction of an electric spindle 1, the side steel balls 24 are slidably connected in the strip-shaped limiting grooves 22, the rotating groove 23 is conical, the strip-shaped limiting groove 22 is semi-cylindrical, the sliding connection is convenient to limit the floating ring 21 in the strip-shaped limiting groove 22 through the side steel ball 24, so that the floating ring 21 can only slide in the strip-shaped limit groove 22 under the driving of the side steel balls 24, in addition, the deflection of the floating ring 21 is limited to a certain extent by utilizing the conical rotating groove 23 and the semi-cylindrical strip-shaped limiting groove 22, so that the floating ring 21 is prevented from rotating by taking the electric spindle 1 as an axis. A floating groove 33 is formed in the floating outer ring 6, the floating ring 21 is arranged in the floating groove 33, and the strip-shaped limiting groove 22 is formed in the side wall of the floating groove 33, so that the floating ring 21 is limited through the floating groove 33, and the floating ring 21 is prevented from being separated from the bottom of the floating outer ring 6.

As shown in fig. 1-5, the floating deburring structure for the polishing device is characterized in that an expansion sleeve 32 is welded on the electric spindle 1 at the lower end of the floating ring 21 or detachably connected with the electric spindle through screw fixation, a locking limiting ring 7 is sleeved on the expansion sleeve 32, the locking limiting ring 7 and the expansion sleeve 32 are conveniently connected with the electric spindle 1, the floating ring 21 is limited, excessive downward sliding of the floating ring 21 and the electric spindle 1 is avoided, and the floating deburring structure is separated from the shell 1 and the floating outer ring 6. The whole vertical section and the inner ring vertical section of the locking limiting ring 7 are both T-shaped, and the expansion sleeve 32 is connected to the inner ring of the locking limiting ring 7 in an interference manner, so that the locking limiting ring 7 and the expansion sleeve 32 are conveniently connected together. One end of the locking limiting ring 7 penetrates through the floating outer ring 6 and extends into the floating groove 33, the locking limiting ring 7 is fixedly detachably connected with the floating ring 21 in the floating groove 33 through bolts, the maximum diameter of the locking limiting ring 7 is larger than the diameter of a lower opening of the floating outer ring 6, a structure which limits the deflection angle and the axial movement length of the electric spindle 1 through the matching of the locking limiting ring 6 and the floating ring 21 is formed, the floating ring 21 is connected with the expansion sleeve 32 through the locking limiting ring 7, the floating ring 21 is fixedly connected with the electric spindle 1, the electric spindle 1 drives the floating ring 21 to deflect, and meanwhile, the deflection angle of the electric spindle 1 is limited by utilizing the gaps between the floating ring 21 and the locking limiting ring 7 and the floating outer ring 6.

As shown in fig. 1-5, the floating deburring structure for the polishing device is characterized in that an upper flange cover 4 is detachably connected to an air-permeable fixed cover plate 3 through screw fixation, an upper protective sleeve 5 sleeved outside an electric spindle 1 is fixed to the upper flange cover 4 in a clamped manner, specifically, a clamping protrusion extends from the upper flange cover 4, a clamping groove is formed in an end face of an opening at one end with a larger diameter of the upper protective sleeve 5, the clamping protrusion is clamped in the clamping groove to realize clamping connection of the upper flange cover 4 and the upper protective sleeve 5, so that the electric spindle 1 is protected through the upper protective sleeve 5, and meanwhile, dust and scraps generated by polishing are prevented from entering the device through a gap between the electric spindle 1 and the upper flange cover 4 to influence deflection of the electric spindle 1. The joint is fixed with the lower lag 8 that the cover was established outside electric spindle 1 on the lower flange lid 8, specifically speaking, lower flange lid 8 extends down and has the joint arch, the draw-in groove has been seted up to the terminal surface in the opening part of the great one end of lower lag 8 diameter, the joint arch joint realizes in the draw-in groove that lower flange lid 8 is connected with the joint of lower lag 8, be convenient for protect electric spindle 1 through lower lag 8, avoid simultaneously that dust and the sweeps that polishes the production to enter into inside the device through the gap between electric spindle 1 and lower flange lid 8, influence the deflection of electric spindle 1. Go up lag 5 and lag 8 down and be the round platform shape of flexible material, be convenient for carry out better protection to electric main shaft 1, also be convenient for simultaneously with last flange cover 4 and the connection of lower flange cover 8, in addition through flexible material, like the rubber material for do not receive lag 5 and lag 8's influence down when electric main shaft 1 deflects. The ventilation fixing cover plate 3 is detachably connected with a robot connecting plate 31 through screw fixation, so that the ventilation fixing cover plate 3 and the robot connecting plate 31 are connected together to form a whole, and the whole device is conveniently loaded on a robot through the robot connecting plate 31. The upper end face of the wear-resistant breathable ring 19 is provided with a plurality of inner vent grooves 34 which communicate the gap between the cylinder 15 and the electric spindle 1 and the shell 2, so that when the piston 16 moves in the cylinder 15, gas in the cylinder 15 can be communicated with the outside through the inner vent grooves 34, the cylinder 15 can exhaust and pump conveniently, and the piston 16 can slide in the cylinder 15 conveniently. The end face of the upper flange cover 4 close to the ventilating fixed cover plate 3 is provided with a plurality of upper vent grooves 35 communicating the outside with the gap between the electric spindle 1 and the upper flange cover 4, the end face of the lower flange cover 8 close to the floating outer ring 6 is provided with a plurality of lower vent grooves 36 communicating the outside with the gap between the electric spindle 1 and the lower flange cover 8, so that the electric spindle 1 is communicated with the inner gap of the shell 2 through the upper vent grooves 35 and the lower vent grooves 36, and further the gas in the cylinder 15 can conveniently flow with the outside.

As shown in fig. 1 to 5, in the floating deburring structure for a grinding device, an electric spindle 1 includes a spindle housing 104, a driving motor 101, a plug 108, a rotor 106 and a positioning bearing 110, and an expansion sleeve 32 is welded or detachably connected to an outer end face of the driving motor 101 by screw fixation, so that the expansion sleeve 32 and the driving motor 101 are connected together to form a whole, and further, the driving motor 101, a locking limit ring 7 and a floating ring 21 are connected together to form a whole. The one end that driving motor 101 extends to have the output shaft has seted up mounting hole 102, mounting hole 102 is close to the open-ended interior terminal surface and has seted up internal thread 103, the one end of main shaft shell 104 extends there is threaded connection head 105, threaded connection head 105 and internal thread 103 threaded connection, be convenient for link together main shaft shell 104 and driving motor 101 and form a whole, and then constitute whole electric main shaft 1's shell body, the quick assembly disassembly of driving motor 101 and main shaft shell 104 of being convenient for simultaneously. A clamping groove 109 is formed in the threaded connector 105, and the positioning bearing 110 is connected in the clamping groove 109 in an interference manner, so that the positioning bearing 110 and the main shaft shell 104 are connected together to form a whole. One end of the rotor 106 penetrates through the main shaft housing 104 along the axis of the main shaft housing 104, and is connected to the positioning bearing 110 in the clamping groove 109 in an interference manner, so that the rotor 106 is supported and limited by the positioning bearing 110, and meanwhile, the rotor 106 is connected with the main shaft housing 104, and further, the rotor 106 is connected with the driving motor 101. One end of the rotor 106 close to the driving motor 101 is provided with a non-circular insertion groove 107, the insertion head 108 is of a non-circular structure, the insertion head 108 is fixed on an output shaft of the driving motor 101 in a welding or threaded connection mode, the insertion head 108 is inserted into the insertion groove 107, the driving motor 101 can be driven to rotate by the aid of the operation of the driving motor 101, the driving motor 101 is driven to rotate together with the rotor 106 through the insertion connection of the insertion head 108 and the insertion groove 107, and power is provided for rotation of a polishing head connected with the rotor 106. One end of the main shaft shell 104, which is far away from the driving motor 101, is detachably connected with a sealing cover 1110 through screw fixation, so that the rotor 106 is supported and limited through the sealing cover 110, the rotor 106 can stably rotate, a gap between the rotor 106 and the main shaft shell 104 is sealed, and dust or waste chips generated by grinding are prevented from entering from the gap between the rotor 106 and the main shaft shell 104 to influence the rotation of the rotor 106.

When in use, the upper vent hole 29 or the side vent hole 30 vents the sealed cavity structure, so that certain pressure is generated in the sealed cavity structure and the cylinder 15, the piston 16 is pushed to be away from the communication hole, one end of the piston 16 is abutted against the upper steel bead 26, and the floating ring 21 is in a horizontal state in the floating groove 33 of the floating outer ring 6; when a grinding head connected with the electric spindle 1 is contacted with a workpiece to generate certain pressure, the electric spindle 1 drives the floating ring 21 and the side steel balls 24 to generate certain deflection, and at the moment, the upper steel balls 26 in the deflection direction push the piston 16 to slide in the cylinder 15 to realize the deflection of the electric spindle 1; when the polishing meets a depression, the pressure borne by the electric spindle 1 is reduced, the piston 16 slides in the cylinder 15 under the push of the sealing cavity structure and the pressure in the cylinder 15, and then the piston 16 pushes the floating ring 21 so that the electric spindle 1 drives the floating ring 21 and the side steel balls 24 to recover, and the deflection angle is reduced; when the grinding meets a bulge, the deflection angle of the electric spindle 1 is increased, so that the electric spindle 1 drives the floating ring 21 and the side steel balls 24 to continuously deflect, and at the moment, the upper steel balls 26 push the piston 16 to continuously move upwards in the cylinder, thereby avoiding damage to a workpiece or breakage of a rigid grinding cutter connected with the electric spindle 1.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. A floating deburring structure for a polishing device comprises an electric spindle (1) and a shell (2) sleeved outside the electric spindle (1), and is characterized in that a ventilating fixed cover plate (3) is fixed at the upper end of the shell (2), a first clamping groove (10) and a second clamping groove (12) are formed in the end face, close to the ventilating fixed cover plate (3), of the shell (2), an outer sealing ring (11) and an inner sealing ring (13) are clamped in the first clamping groove (10) and the second clamping groove (12) respectively, so that an annular sealing cavity structure is formed among the shell (2), the ventilating fixed cover plate (3), the outer sealing ring (11) and the inner sealing ring (13), an upper vent hole (29) and a side vent hole (30) communicated with the sealing cavity structure are formed in the upper end face and the side end face of the ventilating fixed cover plate (3), and a plurality of air cylinders (15) uniformly arranged in an annular shape are formed in the shell (2), the air cylinders (15) are communicated with the sealing cavity structure through communicating holes (14), pistons (16) are connected in the air cylinders (15) in a sliding mode, floating outer rings (6) are fixed to the lower ends of the shells (2), floating rings (21) are sleeved on the electric spindle (1) in the floating outer rings (6), arranging grooves (25) are formed in the upper end faces of the floating rings (21), a plurality of upper steel balls (26) corresponding to the pistons (16) in the vertical direction are arranged in the arranging grooves (25), a plurality of rotating grooves (23) which are uniformly arranged in an annular array mode are formed in the outer side end faces of the floating rings (21), side steel balls (24) are connected in the rotating grooves (23) in a rotating mode, a plurality of strip-shaped limiting grooves (22) are formed in the inner end faces of the floating outer rings (6), and the side steel balls (24) are connected in the strip-shaped limiting grooves (22) in a sliding mode, an expansion sleeve (32) is fixed on the electric main shaft (1) at the lower end of the floating ring (21), and a locking limiting ring (7) is sleeved on the expansion sleeve (32).

2. The floating deburring structure for the grinding device as claimed in claim 1, wherein an upper flange cover (4) is fixed on the ventilation fixing cover plate (3), an upper protection sleeve (5) sleeved outside the electric spindle (1) is fixed on the upper flange cover (4) in a clamping manner, a lower flange cover (8) is fixed at the lower end of the floating outer ring (6), a lower protection sleeve (9) sleeved outside the electric spindle (1) is fixed on the lower flange cover (8), and the upper protection sleeve (5) and the lower protection sleeve (9) are both in a circular truncated cone shape made of flexible materials.

3. The floating deburring structure used on a grinding device according to claim 2, characterized in that a wear-resistant air-permeable ring (19) is fixed in the housing (2), a plurality of telescopic holes (20) corresponding to the air cylinder (15) are formed in the wear-resistant air-permeable ring (19), one end of the piston (16) penetrates through the wear-resistant air-permeable ring (19) through the telescopic holes (20), a plurality of inner vent grooves (34) communicating the air cylinder (15) with the gap between the electric spindle (1) and the housing (2) are formed in the upper end face of the wear-resistant air-permeable ring (19), a plurality of upper vent grooves (35) communicating the outside with the gap between the electric spindle (1) and the upper flange cover (4) are formed in the end face of the upper flange cover (4) close to the air-permeable fixed cover plate (3), and a plurality of lower vent grooves (35) communicating the outside with the gap between the electric spindle (1) and the lower flange cover (8) are formed in the end face of the lower flange cover (8) close to the floating outer ring (6) 36).

4. The floating deburring structure used on the grinding device as claimed in claim 1, characterized in that the vertical section of the piston (16) is T-shaped, the outer side end face of one end of the piston (16) close to the communication hole (14) is provided with a side clamping groove (17), and a sealing ring (18) is clamped in the side clamping groove (17).

5. The floating deburring structure for the grinding device as claimed in claim 1, wherein a steel ball fixing plate (27) is fixed in the placing groove (25), a limiting hole (28) is formed in the steel ball fixing plate (27), and the upper steel ball (26) partially penetrates through the limiting hole (28) and extends out of the steel ball fixing plate (27).

6. The floating deburring structure for grinding devices as claimed in claim 1, wherein a floating groove (33) is formed in the floating outer ring (6), the floating ring (21) is arranged in the floating groove (33), and the strip-shaped limiting groove (22) is formed in a side wall of the floating groove (33).

7. The floating burring structure for a grinding apparatus as claimed in claim 1, wherein the rotation groove (23) is conical and the strip-shaped limiting groove (22) is semi-cylindrical.

8. The floating deburring structure for the grinding device according to claim 1, wherein the locking limit ring (7) is fixedly connected to the floating ring (21), the whole vertical section and the inner ring vertical section of the locking limit ring (7) are both T-shaped, the expansion sleeve (32) is in interference connection with the inner ring of the locking limit ring (7), the maximum diameter of the locking limit ring (7) is larger than the diameter of the lower opening of the floating outer ring (6), and a structure for limiting the deflection angle and the axial movement length of the electric spindle (1) through the cooperation of the locking limit ring (7) and the floating ring (21) is formed.

9. The floating deburring structure for the grinding device as claimed in claim 1, wherein the electric spindle (1) comprises a spindle shell (104), a driving motor (101), a plug connector (108), a rotor (106) and a positioning bearing (110), the expansion sleeve (32) is fixed on the outer end face of the driving motor (101), one end of the driving motor (101) extending to form an output shaft is provided with a mounting hole (102), the inner end face of the mounting hole (102) close to the opening is provided with an internal thread (103), one end of the spindle shell (104) extends to form a threaded connector (105), the threaded connector (105) is in threaded connection with the internal thread (103), a clamping groove (109) is formed in the threaded connector (105), the positioning bearing (110) is fixed in the clamping groove (109), one end of the rotor (106) penetrates through the spindle shell (104) along the axis of the spindle shell (104), the rotor is connected to a positioning bearing (110) in a clamping groove (109) in an interference mode, a non-circular insertion groove (107) is formed in one end, close to the driving motor (101), of the rotor (106), the insertion head (108) is fixed to an output shaft of the driving motor (101), the insertion head (108) is inserted into the insertion groove (107), and a sealing cover (111) is fixed to one end, far away from the driving motor (101), of the main shaft shell (104).

Images