Multi-stiffness radial floating device, processing device

Abstract

The present invention discloses a multi-rigidity radial floating device, comprising a cylinder barrel; a first piston, which is sleeved inside the cylinder barrel and forms a first air cavity with each other; a support seat, which is fixedly installed in the cylinder barrel, a universal bearing is installed on the support seat, and the outer ring of the universal bearing is fixedly connected to the support seat; an abutment ring, which is fixedly installed on the inner ring of the universal bearing; a plurality of top blocks, which are fixedly installed on the edge of the side of the abutment ring facing the first piston so that when the first piston moves toward the abutment ring, the abutment ring can be supported by the top blocks, and when the abutment ring floats in different radial directions, corresponding radial floating of multiple rigidities can be obtained, so that different sizes of force can be applied to the workpiece in different radial directions through the multi-rigidity radial floating, which can not only realize processing, but also help to realize protection of the workpiece to avoid damage to the workpiece due to processing in a non-preset processing direction.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial automation, and in particular to a multi-stiffness radial floating device and a processing device having such a floating device. Background Art

[0002] During the workpiece processing in the industrial production process, axial floating or radial floating is often required. For example, in grinding, axial force or radial force is often applied during the grinding process to achieve grinding. Due to the different surface shapes, positions, and grinding methods of the devices to be ground, the control of the radial force of the grinding tool is becoming increasingly important. Based on this, there are already many constant-force or non-constant-force radial floating devices in the prior art to assist in achieving radial grinding through such radial floating devices.

[0003] For the existing radial floating devices, the realized radial floating or swinging often only has a single stiffness of radial floating or swinging, that is, the stiffness of the radial floating or swinging in all directions is the same. However, considering the actual use requirements, such as in grinding, sometimes only a large stiffness in one or more directions is required to achieve grinding, while a small stiffness of radial floating is required in other radial directions to avoid damaging the workpiece during grinding in that radial direction. For the existing radial floating devices, since the stiffness of each radial floating is the same, during processing, it is very easy to process in the radial direction where no force is originally required, and it is very easy to accidentally damage the workpiece. Summary of the Invention

[0004] Aiming at the above deficiencies, the present invention provides a multi-stiffness radial floating device, which can solve the problem that the existing radial floating devices are prone to accidentally damage the workpiece because the stiffness of each radial floating is the same.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A multi-stiffness radial floating device includes:

[0007] A cylinder barrel;

[0008] A first piston, which is sleeved inside the cylinder barrel and forms a first air chamber therewith. A first air inlet communicating with the first air chamber is provided on the cylinder barrel;

[0009] A support seat, which is fixedly installed inside the cylinder barrel. A universal bearing is installed on the support seat, and the outer ring of the universal bearing is fixedly connected to the support seat;

[0010] An abutting ring, which is fixedly installed on the inner ring of the universal bearing;

[0011] There are multiple top blocks, which are fixedly installed at the edge of the side of the abutting ring facing the first piston so that when the first piston moves towards the abutting ring, the top blocks can hold against the abutting ring, and when the abutting ring swings towards the direction with the top blocks, it can have radial floating with at least one stiffness, and when the abutting ring swings towards the direction without the top blocks, it can have radial floating with at least another stiffness.

[0012] Preferably, there are two top blocks. The two top blocks are located on the same diameter of the abutting ring, and the two top blocks respectively correspond to two opposite sides of a diameter of the first piston.

[0013] Preferably, there are three top blocks. Two of the top blocks are located on the same diameter of the abutting ring, and the two top blocks respectively correspond to two opposite sides of a diameter of the first piston, and the remaining one top block is located on a diameter perpendicular to the two top blocks located on the same diameter of the abutting ring.

[0014] Optionally, when there are more than three top blocks, in addition to the two top blocks located on the same diameter of the abutting ring), at least one top block is elastic in the direction between the abutting ring and the piston, or

[0015] the length of at least one top block is less than the lengths of the two top blocks located on the same diameter of the abutting ring.

[0016] Furthermore, the top block includes a cross bar and a vertical bar vertically arranged on the cross bar. One end of the vertical bar is fixed to the cross bar, and the other end is fixedly connected to the abutting ring; the side of the cross bar abuts against the first piston.

[0017] The present invention also provides a processing device, which includes the multi-stiffness radial floating device described in any one of the above.

[0018] Preferably, the processing device further includes an output unit, and the output unit is sleeved on the inner ring of the universal bearing;

[0019] At the end of the output shaft of the output unit, a tool changing mechanism is fixedly installed. The tool changing mechanism includes an inner sleeve, an outer sleeve is slidably sleeved around the outer periphery of the inner sleeve, and a cavity is formed between the inner sleeve and the outer sleeve. A sliding sleeve is arranged in the cavity. A first elastic member for driving the sliding sleeve to reset is arranged between the sliding sleeve and the inner sleeve, and when the outer sleeve axially slides towards the front end of the inner sleeve, it can drive the sliding sleeve to slide forward;

[0020] The inner sleeve has a side wall provided with a ball groove penetrating the inner wall thereof, wherein a ball is placed in the ball groove, and the ball can move in the ball groove and partially enter the inner sleeve when moving inward;

[0021] An inward closing boss is provided at the front end opening of the sliding sleeve so that the ball can be driven to move toward the inner side of the ball groove and partially enter the interior of the inner sleeve through the closing boss, and a gap is formed between the inner wall of the sliding sleeve and the outer wall of the inner sleeve so that the ball can partially enter when the outer sleeve slides forward and drives the sliding sleeve to slide forward;

[0022] The front end of the inner sleeve is sleeved with a quick-release handle, and the rear end of the quick-release handle is provided with a groove that matches the ball, so that when the ball part enters the interior of the inner sleeve, it can be located in the groove of the quick-release handle;

[0023] The output unit is also provided with a driving mechanism for driving the outer sleeve to slide around the outer periphery of the inner sleeve.

[0024] Optionally, the driving mechanism includes a cylinder body installed at the front end of the output unit, a second piston is arranged in the cylinder body to form a second air cavity, a second air inlet connected to the second air cavity is opened on the cylinder body, and the front end of the second piston extends out of the cylinder body and can drive the outer sleeve forward when moving forward.

[0025] Furthermore, a closing boss inclined surface is provided on the inner end surface of the closing boss.

[0026] Optionally, a fixed sleeve is fixedly mounted on the inner ring of the universal bearing, the output unit is mounted in the fixed sleeve and can slide along the axial direction of the fixed sleeve, and the end of the output unit extends out of the fixed sleeve and is fixedly mounted with a limited end for abutting against the end of the fixed sleeve;

[0027] A second elastic member is disposed between the cylinder body and the fixing sleeve so that the cylinder body has a tendency to move away from the fixing sleeve.

[0028] Optionally, a third elastic member is disposed in the second air cavity, and the third elastic member is located between the second piston and the cylinder body so that the second piston has a tendency to retract into the cylinder body.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the multi-rigidity radial floating device of the present invention has at least two or more types of radial floating of rigidity, that is, multi-rigidity radial floating, so as to realize different magnitudes of force applied to the workpiece in different radial directions through the multi-rigidity radial floating, which can not only realize processing, but also help to realize the protection of the workpiece to avoid damage to the workpiece due to processing in a non-preset processing direction.

[0030] The processing device of the present invention includes the multi-stiffness radial floating device of the present invention, so as to be able to achieve multi-stiffness radial floating processing, and through this multi-stiffness radial floating processing, different magnitudes of force can be applied to the workpiece in different radial directions, which can not only achieve processing, but also help to protect the workpiece to avoid damage to the workpiece during processing in non-preset processing directions, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments.

[0032] Figure 1 It is a schematic structural diagram of the multi-stiffness radial floating device of the present invention;

[0033] Figure 2 It is a schematic cross-sectional view of the multi-stiffness radial floating device of the present invention;

[0034] Figure 3 It is a schematic structural diagram of a universal bearing, an abutting ring, a support seat, a top block, etc. in the multi-stiffness radial floating device;

[0035] Figure 4 is Figure 3 an exploded schematic view;

[0036] Figure 5 It is a schematic structural diagram of the processing device of the present invention;

[0037] Figure 6 It is a schematic structural diagram of the processing device of the present invention from another perspective;

[0038] Figure 7 It is a schematic cross-sectional view of the processing device of the present invention;

[0039] Figure 8 It is a schematic cross-sectional view of the driving mechanism in the processing device of the present invention;

[0040] Figure 9 It is a schematic cross-sectional view of the replacement mechanism and the quick-change tool holder in the processing device of the present invention.

[0041] Among them, the marks shown in the figure are:

[0042] 11 - cylinder barrel; 12 - first piston; 13 - universal bearing; 14 - fixed sleeve; 15 - abutting ring; 16 - support seat; 17 - top block; 171 - cross bar; 172 - vertical bar; 18 - first air chamber; 19 - first air inlet; 110 - limiting end; 111 - second elastic member; 112 - air outlet;

[0043] 20 - output unit; 21 - output shaft 21;

[0044] 30-driving mechanism; 31-cylinder body; 32-second piston; 33-second air chamber; 34-second air inlet; 35-push plate; 36-third elastic member;

[0045] 40-changing mechanism; 41-inner sleeve; 42-outer sleeve; 43-receiving cavity; 44-sliding sleeve; 45-first elastic member; 46-ball groove; 47-ball; 48-closing boss; 49-closing boss inclined surface; 410-gap;

[0046] 51-Quick-release handle. DETAILED DESCRIPTION

[0047] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment 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] Please refer to Figures 1 to 4 The preferred embodiment provides a multi-rigidity radial floating device, which mainly includes a cylinder barrel 11, a first piston 12, a support seat 16, a universal bearing 13, an abutment ring 15 and a top block 17.

[0049] The first piston 12 is sleeved inside the cylinder barrel 11 and forms a first air cavity 18 with each other. The cylinder barrel 11 is provided with a first air inlet 19 connected to the first air cavity 18, so that when air is ventilated into the first air cavity 18 through the first air inlet 19, the first piston 12 can be driven by air pressure to slide toward the front end direction of the cylinder barrel 11. In this preferred embodiment, there is a certain gap between the first piston 12 and the cylinder barrel 11, so that the airflow entering the first air cavity 18 can go out through the gap. At this time, an air outlet 112 is provided on the cylinder barrel 11 to discharge the airflow out of the cylinder barrel 11 through the air outlet 112. The first piston 12 is a sleeve-shaped structure as a whole, and its front end is cylindrical. In order to prevent the first piston 12 from rotating when sliding in the cylinder barrel 11, a linear bearing is provided between the first piston 12 and the cylinder barrel 11, so that the first piston 12 can only slide back and forth along the cylinder barrel 11 but cannot rotate.

[0050] The support seat 16 is fixedly installed in the cylinder barrel 11, specifically fixedly installed at the front end opening of the cylinder barrel 11. The universal bearing 13 is installed on the support seat 16, the outer ring of the universal bearing 13 is fixedly connected to the support seat 16, and the universal bearing 13 and the first piston 12 are coaxially arranged.

[0051] The abutment ring 15 is fixedly mounted on the inner ring of the universal bearing 13, specifically, mounted at the front end of the inner ring of the universal bearing 13, so that the abutment ring 15 can achieve 360° radial deflection under the action of the outward bearing 13, that is, achieve a radial floating. The abutment ring 15 is coaxially arranged with the first piston 12.

[0052] There are multiple top blocks 17, which are fixedly installed on the edge of the side of the abutment ring 15 facing the first piston 12 so that when the first piston 12 moves toward the abutment ring 15, the top blocks 17 can support the abutment ring 15, and when the abutment ring 15 swings in the direction with the top blocks 17, it can have radial floating with at least one stiffness, and when the abutment ring 15 swings in the direction without the top blocks 17, it has radial floating with at least another stiffness.

[0053] A plurality of top blocks 17 are fixedly mounted on the abutment ring 15 and are located together on a circumference, which is coaxial with the abutment ring 15. The abutment ring 15 and the first piston 12 are located on both sides of the support seat 16, respectively. At this time, the support seat 16 has a through hole for the top block 17 to pass through, and the through hole should be large enough so that when the abutment ring 15 floats radially, the top block 17 will not interfere with the support seat 16.

[0054] When ventilating the first air chamber 18 through the first air inlet 19, the first piston 12 can be driven by air pressure to slide towards the front end direction of the cylinder barrel 11, that is, towards the abutting ring 15. At this time, the front end of the first piston 12 abuts against the top block 17 forward, and then abuts against the abutting ring 15. At this time, the abutting ring 15 has a tendency to move away from the first piston 12 under the action of the first piston 12, that is, a force drives the abutting ring 15 to move away from the first piston 12; the abutting ring 15 is fixedly installed at the front end of the inner ring of the universal bearing 13 and can perform radial floating or yawing under the action of the first piston 12. When the processing device or other tools are installed on the universal bearing 13 or the abutting ring 15, when the processing device or other tools contact the workpiece during operation, a force will be generated on the universal bearing 13 or the abutting ring 15, such as a radial force. At this time, the universal bearing 13 and the abutting ring 15 thereon can be driven to perform radial floating or swinging. When the abutting ring 15 performs radial yawing, when the abutting ring 15 swings towards the direction with the top block 17, because there is a direct abutment between the top block 17 and the first bearing 12 in this direction, the force required for swinging is relatively large. At this time, there is at least one kind of radial floating with a certain stiffness, and the force required for this stiffness of radial floating is relatively large, and the swinging is relatively difficult. When the abutting ring 15 swings towards the direction without the top block 17, because there is no direct abutment between the top block 17 and the first bearing 12 in this direction, the force required for swinging is relatively small, and there is at least another kind of radial floating with a certain stiffness, and the force required for this stiffness of radial floating is relatively small, and the swinging is relatively simple. That is, the multi-stiffness radial floating device of the present invention has at least two or more kinds of stiffness of radial floating, that is, it has multi-stiffness radial floating, so as to realize different magnitudes of force application to the workpiece in different radial directions through this multi-stiffness radial floating, which can not only realize processing, but also help to protect the workpiece to avoid damage to the workpiece during non-preset processing directions and the like.

[0055] In an exemplary embodiment, there are two top blocks 17. The two top blocks 17 are located on the same radial line of the abutting ring 15 and are respectively located on opposite sides of a diameter of the abutting ring 15. At this time, the two top blocks 17 are arranged oppositely. At the same time, the two top blocks 17 respectively correspond to opposite sides of a diameter of the first piston 12 and are symmetrically distributed at the cylindrical front end of the first piston 12. At this time, when the first piston 12 slides towards the abutting ring 15, its cylindrical front end abuts against the two top blocks 17, and the abutting ring 15 can be kept stable and has a tendency to move away from the first piston 12 through the two top blocks 17. For example, in a more specific exemplary embodiment, the entire multi-stiffness radial floating device is in a horizontal state. The two top blocks 17 are distributed vertically and are respectively located at the upper and lower parts of the abutting ring 15. During implementation, when a tool installed on the universal bearing 13 or the abutting ring 15 encounters a workpiece or other obstacles, the abutting ring 15 undergoes radial floating or swinging. If the radial direction of the floating or swinging is the radial direction where the upper or lower part of the abutting ring 15 is located, since both the upper and lower parts of the abutting ring 15 are provided with top blocks 17, the abutting ring 15 can directly act on the first piston 12 through the top blocks 17. The direction of this acting force is to squeeze the first piston 12 in the direction away from the abutting ring 15. However, under the action of the ventilation of the first air chamber 18, there is also a certain acting force on the first piston 12, making it not easy for the universal bearing 13 or the abutting ring 15 to undergo radial floating or swinging. That is, the radial floating of the universal bearing 13 or the abutting ring 15 at this time has a relatively large stiffness. Through this radial floating with a relatively large stiffness, the tool installed on the universal bearing 13 or the abutting ring 15 can continuously act on the workpiece to achieve processing of the workpiece, such as grinding. When the radial direction of the floating or swinging is the radial direction where the left or right part of the abutting ring 15 is located, since there are no top blocks 17 on both the left and right parts of the abutting ring 15, the abutting ring 15 installed on the universal bearing 13 will correspondingly swing left or right. At this time, the universal bearing 13 or the abutting ring 15 can easily undergo radial floating or swinging left or right. That is, the radial floating of the universal bearing 13 or the abutting ring 15 at this time has a very small stiffness. Through this radial floating with a very small stiffness, the force exerted by the tool installed on the universal bearing 13 or the abutting ring 15 on the workpiece is very small, and almost no processing of the workpiece will be performed. At this time, damage to the workpiece can be avoided.

[0056] The multi-stiffness radial floating device of the present invention has radial floating with multiple stiffnesses, so that it can selectively achieve processing in one or several radial directions, and in other radial directions, protection of the workpiece can be achieved through a smaller stiffness to avoid damage to the workpiece.

[0057] In other preferred embodiments, there may also be three top blocks 17. At this time, two top blocks 17 are located on the same radial direction of the abutting ring 15, and these two top blocks 17 respectively correspond to two diametrically opposite sides of the first piston 12. The remaining one top block 17 is located on a radial direction perpendicular to the two top blocks 17 located on the same radial direction of the abutting ring 15. For example, in a specific exemplary embodiment, the entire multi-stiffness radial floating device is in a horizontal state, where two top blocks 17 are distributed vertically and are respectively located at the upper and lower parts of the abutting ring 15, and the other top block 17 is located at the left part of the abutting ring 15. During implementation, when the tool installed on the universal bearing 13 or the abutting ring 15 encounters a workpiece or other obstacles, the abutting ring 15 undergoes radial floating or swinging. If the radial direction of the floating or swinging is the radial direction where the upper part, lower part, or left part of the abutting ring 15 is located, then due to the presence of top blocks 17 at the upper, lower, and left parts of the abutting ring 15, the universal bearing 13 or the abutting ring 15 is not easily radially floated or swung under the action of the top blocks 17 and the first bearing 12. That is, the radial floating of the universal bearing 13 or the abutting ring 15 at this time has a relatively large stiffness. Through this radially floating with a relatively large stiffness, the tool installed on the universal bearing 13 or the abutting ring 15 can continuously act on the workpiece to achieve processing of the workpiece, such as grinding. When the radial direction of the floating or swinging is the radial direction where the right part of the abutting ring 15 is located, since there are no top blocks 17 at the right part of the abutting ring 15, the abutting ring 15 installed on the universal bearing 13 will correspondingly swing to the right. At this time, the universal bearing 13 or the abutting ring 15 can easily float or swing radially to the right. That is, the radial floating of the universal bearing 13 or the abutting ring 15 at this time has a very small stiffness. Through this radially floating with a very small stiffness, the force exerted by the tool installed on the universal bearing 13 or the abutting ring 15 on the workpiece is very small, and almost no processing of the workpiece will be performed. At this time, damage to the workpiece can be avoided.

[0058] In more other preferred embodiments, when there are more than three top blocks 17, in addition to the two top blocks 17 located on the same radial of the abutting ring 15, at least one top block 17 has elasticity in the direction between the abutting ring 15 and the piston 12, or at least one top block 17 has a length less than that of the two top blocks 17 located on the same radial of the abutting ring 15. By providing a top block 17 with elasticity in the direction between the abutting ring 15 and the piston 12, due to its elasticity, when floating radially towards the elastic top block 17, a radial floating with a certain stiffness can be obtained, and this stiffness is between that of the rigid top block 17 and the stiffness without a top block. The elastic top block 17 can be a spring or other elastic body. It can also be that at least one top block 17 has a length less than that of the two top blocks 17 located on the same radial of the abutting ring 15. In this case, when floating radially towards the elastic top block 17, the stiffness is very small at the beginning, and when it abuts against the first piston 12 through the top block 17 with a smaller length, the stiffness becomes very large. The stiffness in this form is stage-variable.

[0059] To facilitate the front end of the first piston 12 to push forward against the top block 17 and enable the abutting ring 15 to be kept stable through the top block 17, the contact between the top block 17 and the first piston 12 is preferably a line contact or a surface contact to maintain a stable action through a larger contact area. In this preferred embodiment, the top block 17 includes a cross bar 171 and vertical bars 172 respectively disposed at two ends of the cross bar 171. One end of the vertical bar 172 is fixed to the cross bar 171, and the other end is fixedly connected to the abutting ring 15. The vertical bar 172 passes through the through hole of the support seat 16, and the cross bar 171 is located on the side of the support seat 16 close to the first piston 12. The side surface of the cross bar 171 abuts against the first piston 12 to achieve a stable action of the first piston 12 on the top block 17 and prevent the top block 17 and the abutting ring 15 from shaking. The cross bar 171 is in an arc rod shape, and its diameter is consistent with the circumferential diameter of the cylindrical front end of the first piston 12. When the abutting ring 15 and the first piston 12 are coaxial, the cross bar 171 and the first piston 12 are coaxial. Of course, it can be understood that the length of the cross bar 171 should not be too long. On the premise of ensuring a stable abutment with the first piston 12, if the cross bar 171 is too long, it will affect the small-stiffness radial floating at the place where no top block is provided.

[0060] The present invention also provides a processing device, which includes the above-mentioned multi-stiffness radial floating device to achieve radial floating with different stiffnesses through the above-mentioned multi-stiffness radial floating device, so as to achieve grinding with different requirements and effectively avoid accidental damage to the workpiece.

[0061] Please refer to Figures 1 to 9, the processing device further includes an output unit 20. The output unit 20 is sleeved on the inner ring of the universal bearing 13. The sleeving can be a fixed assembly relationship or a movable one, such as sliding or rotating relative to each other, and can be specifically selected according to actual needs. The output unit 20 is a power output mechanism, such as a motor or an electric spindle, which can provide the power required for grinding. A grinding tool such as a grinding disc can be directly installed on the output shaft of the output unit 20 to achieve grinding. Grinding tools such as grinding discs are common devices, and are not shown or described in detail in this embodiment.

[0062] In this preferred embodiment, a replacement mechanism 40 is fixedly installed at the end of the output shaft 21 of the output unit 20. The replacement mechanism 40 includes an inner sleeve 41. An outer sleeve 42 is slidably sleeved around the outer periphery of the inner sleeve 41. The outer sleeve 42 forms a sliding relationship with the inner sleeve 1 so as to be able to slide back and forth relative to each other. A cavity 43 is formed between the inner sleeve 41 and the outer sleeve 42. A sliding sleeve 44 is arranged in the cavity 43. A first elastic member 45 for driving the sliding sleeve 44 to reset is arranged between the sliding sleeve 44 and the inner sleeve 41. The first elastic member 45 is a compression spring, and when the outer sleeve 42 slides axially towards the front end of the inner sleeve 41, it can drive the sliding sleeve 44 to slide forward.

[0063] A ball groove 46 penetrating the inner wall is provided on the side wall of the inner sleeve 41. A ball 47 is placed in the ball groove 46. The ball groove 46 extends towards the inside of the inner sleeve 41. The ball 47 can move in the ball groove 46 and can partially enter the inside of the inner sleeve 41 when moving towards the inside.

[0064] A closing boss 48 facing inwards is provided at the front end opening of the sliding sleeve 44 so that the closing boss 48 can drive the ball 47 to move towards the inside of the ball groove 46 and partially enter the inside of the inner sleeve 41. A gap 410 is formed between the inner wall of the sliding sleeve 44 and the outer wall of the inner sleeve 41 so that when the outer sleeve 42 slides forward and drives the sliding sleeve 44 to slide forward, the ball 47 can partially enter. A closing boss inclined surface 49 is provided on the inner end face of the closing boss 48, so that when the sliding sleeve 44 slides backward, the ball 47 can be driven to move towards the inside of the ball groove 46 through the action of the closing boss inclined surface 49 and the ball 47 can be pressed by the inner wall of the closing boss 48 to keep the ball 47 partially entering the inside of the inner sleeve 41.

[0065] A quick-change tool holder 51 is sleeved at the front end of the inner sleeve 41. A groove cooperating with the ball 47 is provided at the rear end of the quick-change tool holder 51, so that when the ball 47 partially enters the inside of the inner sleeve 41, it can be located in the groove of the quick-change tool holder 51. At this time, under the action of the inner sleeve 41, the ball 47 and the rear groove of the quick-change tool holder 51, the quick-change tool holder 51 cannot be pulled out from the inner sleeve 41, that is, the installation of the quick-change tool holder 51 can be realized. During implementation, grinding tools such as grinding discs are fixed on the front end of the quick-change tool holder 51.

[0066] A drive mechanism 30 for driving the outer sleeve 42 to slide around the inner sleeve 41 is also provided on the output unit 20. The drive mechanism 30 includes a cylinder block 31 installed at the front end of the output unit 20. A second piston 32 is sleeved inside the cylinder block 31 to form a second air chamber 33 therebetween. A second air inlet 34 communicating with the second air chamber 33 is provided on the cylinder block 31. The front end of the second piston 32 extends out of the cylinder block 31 and can drive the outer sleeve 42 forward when moving forward. Specifically, in a preferred embodiment, a push plate 35 is fixedly installed at the front end of the second piston 32. The push plate 35 is arranged around the outer periphery of the outer sleeve 42. A step interacting with the push plate 35 is provided on the outer periphery of the outer sleeve 42, so that the push plate 35 can abut against the step on the outer sleeve 42 and drive the outer sleeve 42 forward when moving forward with the second piston 32. In the preferred embodiment, when the push plate 35 does not move forward, it does not contact the outer sleeve 42, that is, when the output unit 20 drives the outer sleeve 42 to rotate, it does not interact with the push plate 35.

[0067] By providing the drive mechanism, the inner sleeve 41, the outer sleeve 42, the sliding sleeve 44, etc., the automatic and rapid replacement of the quick-change tool shank 51 can be realized, which helps to improve the automation of the device and the efficiency.

[0068] Specifically, when the quick-change tool holder 51 needs to be replaced, air is introduced into the second air chamber 33. At this time, the second piston 32 moves forward towards the front end of the cylinder block 31. At this time, the second piston 32 drives the push plate 35 at its front end forward and pushes the outer sleeve 42. At the same time, the outer sleeve 42 pushes the sliding sleeve 44 forward. The sliding sleeve 44 and the necking boss 48 thereon move forward and are misaligned with the ball 47. At this time, the quick-change tool holder 51 and the inner sleeve 41 move away from each other (generally, the quick-change tool holder 51 is fixed, and the processing device is driven by a motion mechanism to move so that the quick-change tool holder 51 and the inner sleeve 41 move away from each other). At this time, the ball 47 can move in the ball groove 46 in the direction away from the inner sleeve 41 and partially enter the gap 410 formed between the inner wall of the sliding sleeve 44 and the outer wall of the inner sleeve 41. At this time, the ball 47 is no longer located in the groove of the quick-change tool holder 51, so the limit of the ball 47 on the quick-change tool holder 51 is released, and the quick-change tool holder 51 is pulled out; then a new quick-change tool holder 51 is inserted. After insertion, the groove of the quick-change tool holder 51 is aligned with the ball groove 46. Then, the air supply to the second air chamber 33 is released. Under the action of the first elastic member 45, the sliding sleeve 44 and its necking boss 48 reset backward. At this time, through the inclined surface of the necking boss 49, the ball 47 is driven to move inward in the ball groove 46 and the ball 47 can be pressed by the inner wall of the necking boss 48 to keep the ball 47 partially entering the interior of the inner sleeve 41 and at the same time entering the groove of the quick-change tool holder 51 to limit the quick-change tool holder 51 so that the quick-change tool holder 51 is held in the inner sleeve 1. At this time, the automatic and rapid replacement of the quick-change tool holder 51 is completed. This replacement method is automatic and rapid, can reduce the friction on the outer sleeve 42, and the driving mechanism for driving the replacement is not installed on the outer sleeve 42, which can reduce the load and force on the output shaft 21 of the output unit 20 and ensure the stable output of the output shaft 21 of the output unit 20.

[0069] A third elastic member 36 is arranged in the second air chamber 33. The third elastic member 36 is located between the second piston 32 and the cylinder block 31 so that the second piston 32 has a tendency to retract into the cylinder block 31. The third elastic member 36 is preferably a compression spring, that is, by arranging the third elastic member 36, the second piston 32 can be reset. After the air supply to the second air chamber 33 is stopped, under the action of the third elastic member 36, the second piston 32 is reset, so as to ensure that the second piston 32 and the push plate 35 thereon are completely separated from the outer sleeve 42 without any contact, so as to avoid contact and friction between the second piston 32 and the push plate 35 thereon and the outer sleeve 42 during operation.

[0070] Furthermore, in a preferred embodiment, a fixed sleeve 14 is fixedly sleeved on the inner ring of the universal bearing 13. The output unit 20 is installed in the fixed sleeve 14 and can slide along the axial direction of the fixed sleeve 14. The end of the output unit 20 extends out of the fixed sleeve 14 and is fixedly installed with a limiting end 110 for abutting against the end of the fixed sleeve 14, that is, the end face of the limiting end 110 facing the fixed sleeve 14 can abut against the fixed sleeve 14. A second elastic member 111 is provided between the cylinder block 31 and the fixed sleeve 14 so that the cylinder block 31 has a tendency to move away from the fixed sleeve 14. The second elastic member 111 is preferably a compression spring, that is, the cylinder block 31 can have a tendency to move forward through the second elastic member 111, and the cylinder block 31 is fixed on the output unit 20. At this time, the output unit 20 has a tendency to move forward relative to the fixed sleeve 14. By providing the second elastic member 111, an axial floating relationship can be established between the output unit 20 and the multi-stiffness radial floating device, so that the axial floating effect can be achieved during operations such as grinding; at the same time, during tool changing, due to this axial floating effect, when the quick-change tool holder 51 is inserted into the inner sleeve 41, damage to related components can be avoided when over-insertion occurs. For example, when over-insertion occurs, the inner sleeve 41, the output unit 20, etc. can compress the second elastic member 111 and move backward accordingly to avoid damage caused by over-insertion. Of course, it can be understood that the second elastic member 111 should have sufficient elasticity to ensure the stiffness for machining operations.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A multi-rigidity radial floating device, It is characterized in that Included are: Cylinder barrel (11); A first piston (12) is sleeved inside the cylinder barrel (11) and forms a first air chamber (18); the cylinder barrel (11) is provided with a first air inlet (19) communicating with the first air chamber (18); A support seat (16) fixedly mounted in the cylinder barrel (11), a universal bearing (13) being mounted on the support seat (16), and an outer ring of the universal bearing (13) being fixedly connected to the support seat (16); An abutment ring (15) fixedly mounted on the inner ring of the universal bearing (13); A plurality of top blocks (17) are fixedly mounted on the edge of the side of the abutment ring (15) facing the first piston (12) so that when the first piston (12) moves toward the abutment ring (15), the top blocks (17) can support the abutment ring (15), and when the abutment ring (15) swings in the direction with the top blocks (17), it can have radial floating with at least one stiffness, and when the abutment ring (15) swings in the direction without the top blocks (17), it can have radial floating with at least another stiffness.

2. The multi-rigidity radial floating device according to claim 1, It is characterized in that There are two top blocks (17), the two top blocks (17) are located in the same radial direction of the abutment ring (15), and the two top blocks (17) respectively correspond to two diametrically opposite sides of the first piston (12).

3. The multi-rigidity radial floating device according to claim 1, It is characterized in that There are three top blocks (17), two of which are located on the same radial direction of the abutment ring (15), and the two top blocks (17) respectively correspond to two opposite sides of a diameter of the first piston (12), and the remaining top block (17) is located on a radial direction perpendicular to the two top blocks (17) located on the same radial direction of the abutment ring (15).

4. The multi-rigidity radial floating device according to claim 1, It is characterized in that When there are three or more top blocks (17), in addition to the two top blocks (17) located in the same radial direction of the abutment ring (15), at least one of the top blocks (17) has elasticity in the direction between the abutment ring (15) and the piston (12), or The length of at least one of the top blocks (17) is smaller than the length of two top blocks (17) located in the same radial direction of the abutment ring (15).

5. The multi-rigidity radial floating device according to any one of claims 1 to 4, It is characterized in that The top block (17) comprises a cross bar (171) and a vertical bar (172) vertically arranged on the cross bar (171); one end of the vertical bar (172) is fixed to the cross bar (171) and the other end is fixedly connected to the abutment ring (15); the side surface of the cross bar (171) abuts against the first piston (12).

6. A processing device, It is characterized in that The device comprises the multi-rigidity radial floating device according to any one of claims 1 to 5.

7. The processing device according to claim 6, It is characterized in that It also includes an output unit (20), wherein the output unit (20) is sleeved on the inner ring of the universal bearing (13); A changing mechanism (40) is fixedly mounted on the end of the output shaft (21) of the output unit (20), the changing mechanism (40) comprising an inner sleeve (41), an outer sleeve (42) being slidably sleeved on the periphery of the inner sleeve (41), a cavity (43) being formed between the inner sleeve (41) and the outer sleeve (42), a sliding sleeve (44) being arranged in the cavity (43), a first elastic member (45) for driving the sliding sleeve (44) to return to its original position being arranged between the sliding sleeve (44) and the inner sleeve (41), and when the outer sleeve (42) slides axially towards the front end of the inner sleeve (41), the sliding sleeve (44) can be driven to slide forward; A ball groove (46) penetrating the inner wall of the inner sleeve (41) is provided on the side wall thereof, a ball (47) is placed in the ball groove (46), and the ball (47) is capable of moving in the ball groove (46) and partially entering the interior of the inner sleeve (41) when moving inwards; An inwardly facing closing boss (48) is provided at the front end opening of the sliding sleeve (44) so ​​that the ball (47) can be driven to move toward the inside of the ball groove (46) and partially enter the interior of the inner sleeve (41) through the closing boss (48), and a gap (410) is formed between the inner wall of the sliding sleeve (44) and the outer wall of the inner sleeve (41) so that the ball (47) can partially enter when the outer sleeve (42) slides forward and drives the sliding sleeve (44) to slide forward; A quick-release handle (51) is inserted into the front end of the inner sleeve (41), and a groove cooperating with the ball (47) is provided at the rear end of the quick-release handle (51), so that when the ball (47) partially enters the interior of the inner sleeve (41), it can be located in the groove of the quick-release handle (51); The output unit (20) is also provided with a driving mechanism (30) for driving the outer sleeve (42) to slide on the periphery of the inner sleeve (41).

8. The processing device according to claim 7, It is characterized in that The driving mechanism (30) comprises a cylinder body (31) mounted at the front end of the output unit (20); a second piston (32) is sleeved in the cylinder body (31) to form a second air chamber (33); a second air inlet (34) communicating with the second air chamber (33) is provided on the cylinder body (31); a front end of the second piston (32) protrudes from the cylinder body (31) and is capable of driving the outer sleeve (42) forward when moving forward.

9. The processing device according to claim 7, It is characterized in that The inner end surface of the closing boss (48) is provided with a closing boss inclined surface (49).

10. The processing device according to claim 8, It is characterized in that A fixed sleeve (14) is fixedly sleeved on the inner ring of the universal bearing (13). The output unit (20) is installed in the fixed sleeve (14) and can slide axially along the fixed sleeve (14). The end of the output unit (20) extends out of the fixed sleeve (14) and a limit end (110) is fixedly installed to abut against the end of the fixed sleeve (14). A second elastic member (111) is disposed between the cylinder block (31) and the fixed sleeve (14) so that the cylinder block (31) has a tendency to move away from the fixed sleeve (14).

11. The processing device according to claim 8, characterized in that A third elastic member (36) is disposed in the second air chamber (33). The third elastic member (36) is located between the second piston (32) and the cylinder block (31) so that the second piston (32) has a tendency to retract into the cylinder block (31).

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