Floating joint
By designing the limit groove and rolling element structure of the floating joint, the breakage problem caused by the axis offset of the tap is solved, and the tool error and wear compensation are achieved, which improves the machining stability and tap service life.
Patent Information
- Application Number
- CN202323404745.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-13
AI Technical Summary
During use, the tap is offset by tool alignment error or wear, which is prone to breakage, thereby damaging the processed workpiece.
A floating joint is designed, including a first sleeve, a plurality of floating members and a plurality of rolling elements, through the coordination of the limiting groove and the rolling element, allowing the connecting end of the mandrel to move radially, compensate for the tap axis offset, and Improve stability and flexibility through elastic structure and adjusting parts to prevent excessive stress from taps.
It effectively reduces the risk of breaking the tap during use, reduces the possibility of damage to the threaded workpiece to be tapped, improves the stability and force uniformity of movement synthesis, and extends the service life of the tap.
Smart Images
Figure CN222133717U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of terminal technology, and in particular to a floating joint. Background Art
[0002] The tap's tool setting error or wear caused by long-term use can cause the tap's axis to deviate from the CNC machine's rotating axis during use, making the tap easy to break, which can further damage the workpiece being processed. Utility Model Content
[0003] In view of this, the present application provides a floating joint for improving the problem of easy breakage of taps.
[0004] In a first aspect, the present application provides a floating joint, which comprises a first sleeve, a plurality of floating members and a plurality of first rolling bodies. The first sleeve is provided with a first cavity, and a first inner wall and a second inner wall located on both sides of the first cavity in the axial direction. The first cavity is configured to accommodate a connecting end of a mandrel for fixing a tap, and allows the connecting end to move in the radial direction, and the second inner wall allows the tap to pass through and extend outside the first cavity. The first inner wall is provided with a first groove extending in the radial direction. A plurality of floating members are sequentially arranged between the first inner wall and the connecting end of the mandrel in the axial direction, and move in the radial direction in the first cavity. Each floating member is provided with a second groove extending in a different radial direction on opposite sides in the axial direction. The first groove is connected with the second groove on the opposite side of the adjacent floating member to form a limiting groove, and the second grooves of each two floating members facing each other are connected to form another limiting groove. The second groove of the floating member adjacent to the connecting end is opposite to the groove on the connecting end and connected to form another limiting groove. The extension paths of the plurality of limiting grooves do not overlap on the orthographic projections of the first inner wall or the second inner wall. At least one first rolling body is arranged in each limiting groove, and each first rolling body can roll in the limiting groove and move in the radial direction.
[0005] In the above-mentioned floating joint, multiple limit grooves guide multiple first rolling elements to move along different radial directions between the floating member, the first inner wall and the connecting end, so that the connecting end of the spindle moves in a plane perpendicular to the axial direction, which can compensate for the offset value of the axis of the tap relative to the rotating shaft of the spindle or the driving device caused by tap tool setting, wear and other reasons, thereby reducing the risk of breakage of the tap during use, that is, reducing the risk of damage to the workpiece to be tapped.
[0006] In a possible implementation, the extension paths of the plurality of limiting grooves are arranged in a circular array on the orthographic projection of the first inner wall or the second inner wall.
[0007] In the above embodiment, the extension paths of the plurality of limit grooves are arranged in a circular array on the orthographic projection of the first inner wall, so that the extension paths of the limit grooves between the first inner wall and the adjacent floating part, between the connecting end and the floating part, and between every two floating parts are evenly distributed, thereby improving the stability of the motion synthesis and the uniformity of the force on the first rolling element.
[0008] In a possible implementation, the floating joint further includes a plurality of second rolling bodies, and at least one second rolling body is respectively disposed between the first inner wall and adjacent floating members, between every two adjacent floating members, and / or between the second inner wall and the connecting end.
[0009] In the above embodiment, the plurality of second rolling bodies enhance the supporting force between the first inner wall and the adjacent connecting member, and enhance the flexibility of relative movement between the first sleeve and the floating member, between two adjacent floating members, and between the connecting end and the adjacent floating members.
[0010] In a possible implementation, the floating joint further includes a collar, which is an elastic structure made of an elastically deformable material, and is configured to be sleeved on the outside of the connecting end of the spindle and abut against the cavity wall of the first cavity.
[0011] In the above embodiment, the collar improves the stability of the connecting end in the first cavity and allows the connecting end of the mandrel to move radially in the first cavity.
[0012] In a possible embodiment, the first sleeve includes a first body, a first end cover and a holding member. The first cavity is arranged in the first body, and one end of the first body is provided with a first opening connected to the first cavity. The first end cover is threadedly connected to the first opening of the first body and is provided with a first through hole, the first through hole is connected to the first cavity, and the first through hole allows the end of the spindle away from the connection end to pass through. The holding member is arranged between the end of the plurality of floating members away from the first inner wall and the first end cover, and the second inner wall is arranged on the side of the holding member facing the floating member.
[0013] In the above embodiment, the holding member is located between the connecting end and the first end cover, so that the first end cover is subjected to the axial holding force of the holding member without having to withstand the radial force generated by the rolling of the second rolling body, thereby reducing the impact on the strength of the threaded connection between the first end cover and the first body.
[0014] In a possible implementation, the floating joint further includes a second sleeve and a first elastic member. The second sleeve is provided with a second cavity, and a third inner wall and a fourth inner wall located on both sides of the second cavity, and the fourth inner wall is configured to allow the tap to pass through. The first sleeve is disposed in the second cavity. The first elastic member is disposed between the third inner wall and the first sleeve, and is configured to apply an elastic force to the first sleeve in a direction from the third inner wall toward the fourth inner wall.
[0015] In the above embodiment, the first elastic member provides axial elastic force for the first sleeve and the tap axially fixed by the first sleeve, so as to prevent the tap from applying excessive force to the workpiece in the axial direction and damaging the workpiece or the tap itself.
[0016] In a possible implementation, the second sleeve is provided with a connection portion protruding into the second cavity. The floating joint further comprises an adjusting member, which is adjustably connected to the connection portion along the axial direction, and the first elastic member is supported between the adjusting member and the first sleeve.
[0017] In the above embodiment, when the adjusting member is rotated, the position connected to the connecting portion changes axially, thereby changing the distance between the two ends of the first elastic member, so that the elastic force applied by the first elastic member to the first sleeve changes, thereby changing the limit value of the force applied by the tap to the workpiece along the axial direction.
[0018] In a possible implementation, the floating joint further includes a stopper and a plurality of spherical third rolling bodies. The stopper is disposed between the first elastic member and the first sleeve, and the stopper is disposed in the second cavity to prevent rotation. The stopper and the first sleeve are respectively provided with a plurality of first rolling grooves facing each other, and each two first rolling grooves facing each other are connected to form a spherical groove. The plurality of third rolling bodies are disposed in a rolling manner in the plurality of spherical grooves in a one-to-one correspondence.
[0019] In the above embodiment, when the external force applied to the tap exceeds a set value, the external force overcomes the elastic force of the first elastic member, the stop member moves toward the first elastic member, the third rolling body escapes from at least one first rolling groove of the spherical groove, the stop member and the first sleeve cannot rotate synchronously, and the first sleeve and the second sleeve cannot rotate synchronously, resulting in the driving device being unable to drive the tap to rotate, the tap slips, and the impact caused by excessive force on the tap is reduced.
[0020] In a possible embodiment, the inner wall of the second cavity is provided with a slide groove extending axially, the stopper is provided with a second rolling groove, and the floating joint further includes a fourth rolling body, which is rollingly arranged in the second rolling groove and can roll along the slide groove and move axially.
[0021] In the above embodiment, the plurality of fourth rolling bodies move along different slide grooves, so that the stopper slides axially relative to the cavity wall of the second cavity and cannot rotate, that is, the stopper is arranged in the second cavity in a non-rotatable manner.
[0022] In a possible embodiment, the second sleeve includes a second body, a second end cover, a third end cover and a clamping member. The second body is provided with a second cavity, and a second opening and a third opening connected to both sides of the second cavity. The second end cover is threadedly connected to the second opening of the second body, and is provided with a second through hole, and the second through hole is configured to allow a tap to pass through. The third end cover is provided with a clamping portion. The connecting portion is provided on the third end cover, and can enter the second cavity through the third opening. The clamping member is threadedly connected to the third end cover, and is axially clamped with the clamping portion on opposite sides of the second body. The third inner wall is provided on the third end cover, and the fourth inner wall is provided on the second end cover.
[0023] In the above embodiment, the second main body is provided with the second opening and the third opening, which is convenient for the first sleeve to be installed into the second cavity and for the assembly of the connecting portion and the adjusting member.
[0024] In a possible embodiment, the clamping portion is provided with a plurality of mounting holes. The second sleeve further includes a plurality of fasteners and a plurality of second elastic members corresponding to the mounting holes one by one. The fastener is connected to the clamping portion, and the second elastic member is accommodated in the mounting hole, and one end of the second elastic member abuts against a side of the second body away from the clamping member, and the other end abuts against the fastener.
[0025] In the above embodiment, the second elastic member elastically abuts against the fastener and the side of the clamping portion facing away from the clamping member, thereby improving the stability of the clamping member being threadedly connected to the third end cover.
[0026] In a possible embodiment, the second sleeve further includes positioning members corresponding to the plurality of mounting holes. The second body is provided with a plurality of positioning grooves facing the mounting holes, and each positioning member is accommodated in each facing mounting hole and positioning groove, so that the clamping portion and the second body are positioned along the circumferential direction.
[0027] In the above embodiment, each positioning member is accommodated in each opposing mounting hole and positioning groove, so that the clamping portion and the second body are positioned along the circumferential direction, and the third end cover and the second body rotate synchronously. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 A schematic diagram of the assembly of a floating joint and a spindle provided in an embodiment of the present application.
[0029] Figure 2 for Figure 1 A partially exploded schematic diagram of the floating joint shown.
[0030] Figure 3 for Figure 1 The floating joint is shown in a schematic cross-sectional view along line III-III.
[0031] Figure 4 for Figure 1A schematic diagram of the assembly of the first sleeve and the spindle in the floating joint is shown.
[0032] Figure 5 for Figure 1 Exploded view of floating joint shown.
[0033] Figure 6 for Figure 5 An exploded schematic diagram of the floating joint shown in another perspective.
[0034] Figure 7 for Figure 1 A schematic diagram of the first body in the floating joint is shown.
[0035] Figure 8 for Figure 1 Schematic diagram of the second body in the floating joint shown.
[0036] Main component symbols
[0037] Floating joint 100
[0038] The third groove 1001
[0039] Fourth groove 1002
[0040] First sleeve 10
[0041] First cavity 101
[0042] First inner wall 102
[0043] Second inner wall 103
[0044] First groove 104
[0045] First body 11
[0046] First opening 1101
[0047] First end cover 13
[0048] First through hole 1301
[0049] Pressing piece 15
[0050] Floating piece 20
[0051] The second groove 201
[0052] Limiting slot 202
[0053] First rolling element 30
[0054] Second rolling element 40
[0055] Ring 50
[0056] Second sleeve 60
[0057] The second cavity 601
[0058] Chute 602
[0059] The third inner wall 603
[0060] Fourth inner wall 604
[0061] Connection part 605
[0062] Second body 61
[0063] Second opening 6101
[0064] The third opening 6102
[0065] Positioning slot 6103
[0066] Second end cover 62
[0067] The second through hole 6201
[0068] The third end cover 63
[0069] Clamping part 631
[0070] Mounting hole 6311
[0071] Clamp 64
[0072] Fastener 65
[0073] The second elastic member 67
[0074] Positioning piece 68
[0075] The first elastic member 70
[0076] Adjustment 80
[0077] Stopper 90
[0078] First rolling groove 901, 105
[0079] Second rolling groove 903
[0080] The third rolling element 110
[0081] Fourth rolling element 120
[0082] Spindle 200
[0083] Connection terminal 2001
[0084] Groove 2002
[0085] First Bushing 2003
[0086] Second Bushing 2004
[0087] Heart Set 2005
[0088] Tap 300
[0089] Processing Department 301
[0090] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0091] In order to further illustrate the technical means and effects adopted by the present application to achieve the intended application purpose, the following is combined with the drawings and implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0093] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0094] Please also see Figures 1 to 3 One embodiment of the present application provides a floating joint 100. The floating joint 100 is used to position a mandrel 200 and is installed on a driving device (not shown), such as a CNC machine tool. The mandrel 200 is used to fix a tap 300, and the tap 300 is used for tapping.
[0095] The mandrel 200 includes a first sleeve 2003, a second sleeve 2004 and a core sleeve 2005. The core sleeve 2005 is a deformable structure and is sleeved on the outside of the tap 300. The first sleeve 2003 is sleeved on the outside of the core sleeve 2005. The second sleeve 2004 is connected to the outside of the first sleeve 2003 and compresses the first sleeve 2003 in the radial direction. The first sleeve 2003 deforms the core sleeve 2005 so that the core sleeve 2005 holds the outer periphery of the tap 300, thereby realizing that the mandrel 200 fixes the tap 300. A processing portion 301 is provided at one end of the tap 300. The processing portion 301 is located outside the mandrel 200 to tap a workpiece. A connecting end 2001 is provided at one end of the first sleeve 2003 away from the processing portion 301 of the tap 300. The connecting end 2001 is used to connect with the floating joint 100.
[0096] It can be understood that the specific structure of the spindle 200 is not limited in the present application, as long as the spindle 200 of the fixed tap 300 is provided with a connection end 2001 connected to the floating joint 100 .
[0097] The floating joint 100 includes a first sleeve 10, a plurality of floating members 20, and a plurality of first rolling bodies 30. The first sleeve 10 is provided with a first cavity 101, and a first inner wall 102 and a second inner wall 103 located on both sides of the first cavity 101. The first cavity 101 accommodates the connecting end 2001 of the mandrel 200. The second inner wall 103 allows the tap 300 to extend out of the first cavity 101. The first inner wall 102 is provided with a first groove 104, such as Figure 7 Each floating member 20 is provided with a second groove 201 on two opposite sides thereof.
[0098] In one embodiment, the outer peripheral wall of the first sleeve 10 is a substantially circular barrel-shaped symmetrical structure, but is not limited thereto. For example, in other embodiments, the outer peripheral wall of the first sleeve 10 is a stepped structure, or a rectangular barrel-shaped structure, etc., as long as the first sleeve 10 can be connected to the driving device. The symmetry axis of the first sleeve 10 is parallel to the rotation axis of the tap 300.
[0099] In order to make the subsequent description clear, the axial direction is defined as the symmetry axis of the first sleeve 10, and the radial direction is defined as a direction perpendicular to the symmetry axis of the first sleeve 10 and passing through the symmetry axis.
[0100] Multiple floating members 20 are sequentially arranged in the first cavity 101 along the axial direction, and are located between the first inner wall 102 and the connecting end 2001 of the spindle 200, so that the first inner wall 102 and the connecting end 2001 limit the displacement of the multiple floating members 20 along the axial direction. Each floating member 20 can move radially in the first cavity 101. Each floating member 20 is provided with a second groove 201 on opposite sides along the axial direction. The first groove 104 and the second groove 201 extend radially respectively. The first groove 104 is opposite to and connected with the second groove 201 of the adjacent floating member 20 to form a limiting groove 202. The second grooves 201 of two adjacent floating members 20 are opposite to and connected to form another limiting groove 202. The first groove 104 of the first inner wall 102 and the second grooves 201 of the multiple floating members 20 form a plurality of limiting grooves 202. Each limiting groove 202 accommodates two first rolling bodies 30, and each first rolling body 30 rolls in the limiting groove 202 and moves radially in the limiting groove 202, so that the floating member 20 is subjected to rolling friction when moving in the first cavity 101, and the connecting end 2001 of the central shaft 200 is guided by the first rolling body 30 when moving radially in the first cavity 101, thereby improving the flexibility of movement.
[0101] In addition, a first rolling body 30 is supported between the connecting end 2001 of the central shaft 200 and the floating member 20, another first rolling body 30 is supported between two adjacent floating members 20, and another first rolling body 30 is supported between the first inner wall 102 and the floating member 20, thereby reducing the sliding friction between the floating member 20 and the first inner wall 102, the two adjacent floating members 20, and the floating member 20 and the connecting end 2001, thereby further improving the flexibility of the connecting end 2001 and the floating member 20 in radial movement.
[0102] The extension paths of the multiple limit grooves 202 do not overlap in the orthographic projection of the first inner wall 102. The displacement synthesis of the first rolling body 30 in different directions between two different components (for example, the first inner wall 102 of the first sleeve 10 and the adjacent floating part 20, two adjacent floating parts 20, the connecting end 2001 of the central shaft 200 and the adjacent floating part 20) enables the connecting end 2001 on one side of the multiple floating parts 20 to move in a plane perpendicular to the axial direction.
[0103] The plurality of limit grooves 202 guide the plurality of first rolling bodies 30 to move along different radial directions between the floating member 20, the first inner wall 102 and the connecting end 2001, so that the connecting end 2001 of the spindle 200 moves in a plane perpendicular to the axial direction, which can compensate for the offset value of the axis of the tap 300 relative to the spindle 200 or the rotating shaft of the driving device caused by tool alignment, wear and the like of the tap 300, thereby reducing the risk of breakage of the tap 300 during use, that is, reducing the risk of damage to the workpiece to be tapped.
[0104] In one embodiment, the number of the floating members 20 is four, but not limited thereto. For example, in other embodiments, the number of the floating members 20 may also be two, three, five, or other numbers.
[0105] It can be understood that in other embodiments, the limiting groove 202 can also accommodate one, three or other numbers of rolling bodies.
[0106] In one embodiment, the extension paths of the plurality of limit grooves 202 are arranged in a circular array on the orthographic projection of the first inner wall 102, so that the extension paths of the limit grooves 202 between the first inner wall 102 and the adjacent floating member 20, between the connecting end 2001 and the floating member 20, and between every two floating members 20 are evenly distributed, thereby improving the stability of the motion synthesis and the uniformity of the force on the first rolling member.
[0107] It can be understood that in other embodiments, the extension paths of the plurality of limiting grooves 202 are also projected onto the first inner wall 102 in a non-uniform manner.
[0108] In one embodiment, there are two first grooves 104 on the first inner wall 102, and the extension paths of the two first grooves 104 are collinear. There are two second grooves 201 on each side of the floating member 20, and the extension paths of the two second grooves 201 are collinear.
[0109] It is understood that in other embodiments, the number of first grooves 104 can be one, three, four, or other numbers, as long as the extension paths of the plurality of first grooves 104 are collinear. The number of second grooves 201 on each side of the floating member 20 can also be other numbers, as long as the extension paths of the plurality of second grooves 201 are collinear.
[0110] In one embodiment, the first rolling body 30 is a spherical structure, but is not limited thereto. For example, in other embodiments, the first rolling body 30 may also be a cylindrical shape, and the circumferential surface of the first rolling body 30 rolls in contact with the wall of the groove 2002 of the limiting groove 202 .
[0111] The floating joint 100 further includes a collar 50. The collar 50 is an elastic structure made of an elastically deformable material. For example, the collar 50 is a rubber sleeve structure. The collar 50 is sleeved on the outer periphery of the connecting end 2001 and abuts against the cavity wall of the first cavity 101. The collar 50 improves the stability of the connecting end 2001 in the first cavity 101 and allows the connecting end 2001 of the mandrel 200 to move radially in the first cavity 101.
[0112] It is understandable that in other embodiments, the ring 50 may also be omitted.
[0113] In one embodiment, the floating joint 100 further includes a plurality of second rolling bodies 40. The second rolling body 40 is a spherical structure. A third groove 1001 is provided in at least one of the first inner wall 102 and the adjacent floating member 20, and a fourth groove 1002 is provided in the other; one of the two adjacent floating members 20 is provided with the third groove 1001, and the other is provided with the fourth groove 1002. The third groove 1001 is a hemispherical groove 2002, and the diameter of the fourth groove 1002 is greater than the radius of the second rolling body 40, so that the second rolling body 40 rolls in the fourth groove 1002 and moves in a plane perpendicular to the axial direction.
[0114] In one embodiment, a second rolling body 40 is also rollingly disposed between the connecting end 2001 and the adjacent floating member 20 .
[0115] The plurality of second rolling bodies 40 enhance the supporting force between the first inner wall 102 and the adjacent connecting members, and enhance the flexibility of relative movement between the first sleeve 10 and the floating member 20 , between two adjacent floating members 20 , and between the connecting end 2001 and the adjacent floating members 20 .
[0116] It can be understood that in other embodiments, the second rolling element 40 can also be omitted.
[0117] Please continue reading Figure 4 and Figure 7 In one embodiment, the first sleeve 10 includes a first body 11, a first end cover 13 and a holding member 15. The first cavity 101 is disposed in the first body 11. One end of the first body 11 is provided with a first opening 1101 connected to the first cavity 101. The first end cover 13 is threadedly connected to the first opening 1101 of the first body 11. The first end cover 13 is provided with a first through hole 1301, and the first through hole 1301 is connected to the first cavity 101. The first through hole 1301 allows the end of the spindle 200 away from the connection end 2001 and the tap 300 to pass through. The holding member 15 is disposed between the end of the plurality of floating members 20 away from the first inner wall 102 and the end cover. The second inner wall 103 is disposed on the side of the holding member 15 facing the floating member 20. The second rolling body 40 is disposed between the holding member 15 and the connection end 2001. The holding member 15 is located between the connecting end 2001 and the first end cover 13, so that the first end cover 13 is subjected to the axial holding force of the holding member 15 without having to withstand the radial force generated by the rolling of the second rolling body 40, thereby reducing the influence on the threaded connection strength between the first end cover 13 and the first body 11.
[0118] Please continue reading Figure 3 , Figure 5 , Figure 6 and Figure 8 In one embodiment, the floating joint 100 further includes a second sleeve 60 and a first elastic member 70. The second sleeve 60 is connected to the driving device. A second cavity 601 is provided in the second sleeve 60, and a third inner wall 603 and a fourth inner wall 604 are axially located on both sides of the first cavity 101. The fourth inner wall 604 allows the tap 300 to pass through. The first sleeve 10 is non-rotatably arranged in the second cavity 601. The first elastic member 70 is arranged between the third inner wall 603 and the first sleeve 10, and applies an elastic force to the first sleeve 10 in a direction from the third inner wall 603 to the fourth inner wall 604.
[0119] The first elastic member 70 provides axial elastic force for the first sleeve 10 and the tap 300 axially fixed by the first sleeve 10 , so as to prevent the tap 300 from applying excessive force to the workpiece in the axial direction and damaging the workpiece or the tap 300 itself.
[0120] In one embodiment, the floating joint 100 further includes an adjusting member 80. The adjusting member 80 cooperates with the second sleeve 60 to adjust the elastic force applied by the first elastic member 70 to the first sleeve 10. The second sleeve 60 is provided with a connecting portion 605. The connecting portion 605 is located in the second cavity 601. The adjusting member 80 is threadedly connected to the connecting portion 605, and the position connected to the connecting portion 605 is adjustable along the axial direction. The two ends of the first elastic member 70 are respectively abutted between the adjusting member 80 and the first sleeve 10. By rotating the adjusting member 80, the position where the adjusting member 80 is connected to the connecting portion 605 is changed along the axial direction, thereby changing the distance between the two ends of the first elastic member 70, so that the elastic force applied by the first elastic member 70 to the first sleeve 10 is changed, so as to change the limit value of the force applied by the tap 300 to the workpiece along the axial direction.
[0121] It can be understood that in other embodiments, the connecting portion 605 and the adjusting member 80 can also be connected by snap-fitting. For example, a plurality of snap-fitting portions (not shown) are provided on the connecting portion 605, and a snap-fitting portion (not shown) is provided on the adjusting member 80. The snap-fitting portions are snap-fitted with different snap-fitting portions to have different distances from the first sleeve 10, thereby changing the elastic force of the first elastic member 70.
[0122] In one embodiment, the floating joint 100 further includes a stopper 90, a third rolling body 110 and a fourth rolling body 120. The stopper is arranged in the second cavity 601 to be axially fixed. The stopper is located between the first elastic member 70 and the first sleeve 10. The stopper 90 is provided with a plurality of first rolling grooves 901. The first sleeve 10 is provided with a plurality of first rolling grooves 105 facing the first rolling grooves 901 of the stopper 90. Each of the first rolling grooves 901 facing each other is connected with the first rolling groove 105 to form a spherical groove 2002. Each third rolling body 110 is rollingly arranged in a spherical groove 2002, and the groove 2002 wall of the spherical groove 2002 radially stops the third rolling body 110, so that the groove 2002 wall of the first rolling groove 901105 of the first sleeve 10 and the groove 2002 wall of the first rolling groove 901105 of the stop member 90 are moved simultaneously by the third rolling body 110, thereby making the stop member 90 rotate synchronously with the first sleeve 10.
[0123] When the external force on the tap 300 exceeds the set value, the external force overcomes the elastic force of the first elastic member 70, the stopper 90 moves toward the first elastic member 70, the third rolling body 110 escapes from one of the first rolling groove 901 and the first rolling groove 105 of the spherical groove 2002, the stopper 90 and the first sleeve 10 cannot rotate synchronously, and the first sleeve 10 and the second sleeve 60 cannot rotate synchronously, resulting in the driving device being unable to drive the tap 300 to rotate, the tap 300 slips, and the impact caused by excessive force on the tap 300 is reduced.
[0124] In one embodiment, the outer peripheral wall of the stopper 90 is provided with a plurality of second rolling grooves 903. The cavity wall of the second cavity 601 is provided with a plurality of chute grooves 602 extending in the axial direction. The floating joint 100 further includes a plurality of fourth rolling bodies 120. Each fourth rolling body 120 is rollingly disposed in a second rolling groove 903, and is rollingly disposed in a chute 602 and moves in the chute 602 in the axial direction.
[0125] The plurality of fourth rolling bodies 120 move along different slide grooves 602 , so that the stopper 90 slides axially relative to the cavity wall of the second cavity 601 and cannot rotate, that is, the stopper 90 is non-rotatably arranged in the second cavity 601 .
[0126] It is understandable that in other embodiments, the stopper 90 may also be omitted. The first elastic member 70 directly abuts against the first sleeve 10 , and the fourth rolling body 120 is rollingly disposed on the outer peripheral wall of the first sleeve 10 .
[0127] In one embodiment, the second sleeve 60 includes a second body 61, a second end cover 62, a third end cover 63 and a clamping member 64. The second body 61 is provided with a second cavity 601, and a second opening 6101 and a third opening 6102 communicating with each other on both sides of the second cavity 601. The second end cover 62 is threadedly connected to the second opening 6101 of the second body 61. The second end cover 62 is provided with a second through hole 6201. The second through hole 6201 is configured to allow the side of the spindle 200 away from the connection end 2001 and the tap 300 to pass through. The third end cover 63 is provided with a clamping portion 631. The connection portion 605 is provided on the third end cover 63 and can enter the second cavity 601 through the third opening 6102. The clamping member 64 is threadedly connected to the third end cover 63 and is axially clamped with the clamping portion 631 on opposite sides of the second body 61. The third inner wall 603 is disposed on the third end cover 63 , and the fourth inner wall 604 is disposed on the second end cover 62 .
[0128] The second body 61 defines a second opening 6101 and a third opening 6102 , which facilitates the first sleeve 10 to be installed into the second cavity 601 and facilitates the assembly of the connecting portion 605 and the adjusting member 80 .
[0129] In one embodiment, the clamping portion 631 is provided with a plurality of mounting holes 6311. The second sleeve 60 further includes a plurality of fasteners 65 and a plurality of second elastic members 67 corresponding to the mounting holes 6311. The fastener 65 is connected to the clamping portion 631. The elastic member is accommodated in the mounting hole 6311, and one end of the elastic member abuts against a side of the second body 61 away from the clamping member 64, and the other end abuts against the fastener 65.
[0130] The second elastic member 67 elastically abuts against the fastener 65 and the side of the clamping portion 631 facing away from the clamping member 64 , thereby improving the stability of the clamping member 64 being threadedly connected to the third end cover 63 .
[0131] It can be understood that in other embodiments, the second elastic member 67 and the fastener 65 may also be omitted.
[0132] In one embodiment, the second sleeve 60 further includes positioning members 68 corresponding to the plurality of mounting holes 6311. The second body 61 is provided with a plurality of positioning grooves 6103 facing the mounting holes 6311. Each positioning member 68 is accommodated in each facing mounting hole 6311 and positioning groove 6103, so that the clamping portion 631 and the second body 61 are positioned in the circumferential direction, so that the third end cover 63 and the second body 61 rotate synchronously.
[0133] In one embodiment, the positioning member 68 is a spherical structure, and the positioning groove 6103 is a hemispherical groove 2002, but it is not limited thereto.
[0134] It can be understood that in other embodiments, the positioning member 68 can also be omitted.
[0135] The floating joint 100 guides the first rolling bodies 30 to move along different radial directions between the floating member 20, the first inner wall 102 and the connecting end 2001 through the limiting grooves 202, so that the connecting end 2001 of the spindle 200 moves in a plane perpendicular to the axial direction, which can compensate for the offset value of the axis of the tap 300 relative to the spindle 200 or the rotating shaft of the driving device caused by the tool alignment and wear of the tap 300, thereby reducing the risk of breakage of the tap 300 during use, that is, reducing the risk of damaging the workpiece to be tapped.
[0136] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.
Claims
1. A floating joint, comprising: The first sleeve is provided with a first cavity, and a first inner wall and a second inner wall located on both sides of the first cavity in the axial direction; the first cavity is configured to accommodate the connecting end of the spindle for fixing the tap, and allows the connecting end to move radially, and the second inner wall allows the tap to pass through and extend outside the first cavity; the first inner wall is provided with a first groove extending in the radial direction; it is characterized in that the floating joint further includes: A plurality of floating members are sequentially arranged between the first inner wall and the connecting end of the spindle along the axial direction, and move radially in the first cavity; each of the floating members is provided with second grooves extending along different radial directions on opposite sides along the axial direction; the first groove is connected with the second groove on the opposite side of the adjacent floating member to form a limiting groove, and the second grooves facing each other of every two floating members are connected to form another limiting groove; the second groove of the floating member adjacent to the connecting end is opposite to the groove on the connecting end and is connected to form another limiting groove; the extension paths of the plurality of limiting grooves do not overlap on the orthographic projection of the first inner wall or the second inner wall; and A plurality of first rolling bodies, at least one of the first rolling bodies is arranged in each of the limiting grooves, and each of the first rolling bodies can roll in the limiting groove and move along the radial direction.
2. The floating joint according to claim 1, characterized in that: The extension paths of the plurality of limiting grooves are arranged in a circular array as orthographic projections on the first inner wall or the second inner wall.
3. The floating joint according to claim 1, characterized in that: The floating joint further comprises a plurality of second rolling bodies, at least one second rolling body being respectively arranged between the first inner wall and the adjacent floating members, between every two adjacent floating members, and / or between the second inner wall and the connecting end.
4. The floating joint according to claim 1, characterized in that: The floating joint further comprises a collar, which is an elastic structure made of elastically deformable material. The collar is configured to be sleeved on the outer side of the connecting end of the spindle and abut against the cavity wall of the first cavity.
5. The floating joint according to claim 1, characterized in that: The first sleeve comprises: A first body, wherein the first cavity is disposed in the first body, and one end of the first body is provided with a first opening communicating with the first cavity; A first end cover is threadedly connected to the first opening of the first body and is provided with a first through hole, the first through hole is connected to the first cavity, and the first through hole allows the end of the spindle away from the connecting end to pass through; and A holding member is disposed between one end of the plurality of floating members away from the first inner wall and the first end cover, and the second inner wall is disposed on a side of the holding member facing the floating members.
6. The floating joint according to claim 1, characterized in that: The floating joint also includes: a second sleeve, having a second cavity, and a third inner wall and a fourth inner wall located on both sides of the second cavity, wherein the fourth inner wall is configured to allow the tap to pass through; the first sleeve is disposed in the second cavity; and The first elastic member is disposed between the third inner wall and the first sleeve, and is configured to apply an elastic force along the third inner wall toward the fourth inner wall to the first sleeve.
7. The floating joint according to claim 6, characterized in that: The second sleeve is provided with a connecting portion protruding into the second cavity; The floating joint further includes an adjusting member, which is adjustably connected to the connecting portion along the axial direction, and the first elastic member is abutted between the adjusting member and the first sleeve.
8. The floating joint according to claim 7, characterized in that The floating joint also includes: A stopper is disposed between the first elastic member and the first sleeve, and the stopper is disposed in the second cavity in a rotationally fixed manner; The stopper and the first sleeve are respectively provided with a plurality of first rolling grooves facing each other, and each two first rolling grooves facing each other are connected to form a spherical groove; A plurality of spherical third rolling bodies are rollingly arranged in the plurality of spherical grooves in a one-to-one corresponding manner.
9. The floating joint according to claim 8, characterized in that: The inner wall of the second cavity is provided with a sliding groove extending along the axial direction, and the stopper is provided with a second rolling groove. The floating joint further includes a fourth rolling body, which is rollingly disposed in the second rolling groove and can roll along the sliding groove and move along the axial direction.
10. The floating joint according to claim 7, characterized in that: The second sleeve comprises: The second body is provided with the second cavity, and a second opening and a third opening communicating with two sides of the second cavity; A second end cover, threadedly connected to the second opening of the second body, and provided with a second through hole, wherein the second through hole is configured to allow the tap to pass through; The third end cover is provided with a clamping portion; the connecting portion is provided on the third end cover and can enter the second cavity through the third opening; A clamping member, threadedly connected to the third end cover, and clamped with the clamping portion along the axial direction at two opposite sides of the second body; The third inner wall is disposed on the third end cover, and the fourth inner wall is disposed on the second end cover.
11. The floating joint according to claim 10, characterized in that: The clamping portion is provided with a plurality of mounting holes; the second sleeve further comprises a plurality of fasteners and a plurality of second elastic members corresponding one by one to the mounting holes; The fastener is connected to the clamping portion. The second elastic member is accommodated in the mounting hole, and one end of the second elastic member abuts against a side of the second body away from the clamping member, and the other end abuts against the fastener.
12. The floating joint according to claim 11, characterized in that: The second sleeve also includes positioning pieces corresponding to the plurality of mounting holes one by one; The second body is provided with a plurality of positioning grooves facing the mounting holes, and each positioning member is accommodated in each of the mounting holes and the positioning grooves facing each other, so that the clamping portion and the second body are positioned along the circumferential direction.