CN110961958A - Diameter-variable bearing clamp - Google Patents
Diameter-variable bearing clamp Download PDFInfo
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- CN110961958A CN110961958A CN201911225564.4A CN201911225564A CN110961958A CN 110961958 A CN110961958 A CN 110961958A CN 201911225564 A CN201911225564 A CN 201911225564A CN 110961958 A CN110961958 A CN 110961958A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 230000033001 locomotion Effects 0.000 claims description 12
- 238000013459 approach Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 23
- 238000000034 method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
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- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Rolling Contact Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a diameter-variable bearing clamp which comprises a clamping mechanism and a rotary driving mechanism, wherein the clamping mechanism comprises a clamping head and a clamping head; the clamping mechanism comprises a base, two clamping pieces oppositely arranged on the base and a clamping driving mechanism; wherein the clamping member comprises a clamping portion at an upper end and a clamping arm at a lower end; the clamping part comprises an upper inner ring clamping part and a lower outer ring clamping part; the clamping driving mechanism comprises a driving piece and a transmission assembly; the transmission assembly comprises a screw rod, a screw rod nut and two connecting rods; one end of the connecting rod is hinged with the screw rod nut, and the other end of the connecting rod is hinged with the clamping arm. The fixture can be suitable for bearings with different specifications and sizes to clamp, and can realize reinforced grinding processing on raceways of a bearing inner ring and a bearing outer ring, so that the working efficiency is improved; the clamp is simple in structural design, effectively saves the manufacturing cost, and does not damage the surface of the bearing in the process of clamping and processing the bearing.
Description
Technical Field
The invention relates to a bearing clamp, in particular to a diameter-variable bearing clamp.
Background
The bearing has wide application in the mechanical field and is an important part in the current mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient in its motion process and ensure its rotation precision. The bearings can be classified into rolling bearings and sliding bearings according to the frictional properties of the moving elements. Rolling bearings have been standardized and serialized, but have a larger radial size, vibration and noise, and a higher price than sliding bearings. The rolling bearing generally comprises an outer ring, an inner ring, a rolling body and a retainer. The machining precision and the surface quality of the bearing directly influence the precision of transmission and the service life of machinery. In order to improve the surface quality, the surfaces of the inner raceway of the bearing outer ring and the outer raceway of the bearing inner ring are often subjected to reinforced grinding processing by adopting a metal surface reinforcing technology.
At present, a mechanical three-jaw self-centering manual clamp adopted in the mechanical industry can only clamp a bearing workpiece and process an inner raceway of a bearing outer ring, and has the defects of low speed and efficiency of manual workpiece clamping, workpiece deformation caused by difficult control of clamping force and the like. The centering fixture is adopted to clamp the bearing workpiece, only the outer raceway of the bearing inner ring can be machined, different numbers of gaskets are required to be added when the bearing inner rings with different diameters are machined, the thickness of the gaskets is not necessarily just enough, sometimes, the tensioning force on the bearing inner ring is too large or too small, the inner surface of the bearing inner ring is damaged when the gasket is too large, the tensioning force is not enough when the gasket is too small, and the bearing inner ring is in danger of falling when the gasket is rotated; and the clamping and the dismantlement of work piece are loaded down with trivial details, and production efficiency is lower. Although the existing electromagnetic centerless clamp can process both the bearing inner ring and the bearing outer ring, the clamp has a complex structure and higher manufacturing cost; in addition, the two supporting blocks can rub the surface of the bearing during rotation, which causes damage to the surface of the bearing.
Disclosure of Invention
The invention aims to overcome the existing problems and provides a variable-diameter bearing clamp which can be suitable for clamping bearings with different specifications and sizes, can realize reinforced grinding processing on raceways of a bearing inner ring and a bearing outer ring and improve the working efficiency; the clamp is simple in structural design, effectively saves the manufacturing cost, and does not damage the surface of the bearing in the process of clamping and processing the bearing.
The purpose of the invention is realized by the following technical scheme:
a variable-diameter bearing clamp comprises a clamping mechanism for clamping a bearing and a rotary driving mechanism for driving the clamping mechanism to rotate; the clamping mechanism comprises a base, two clamping pieces which are oppositely arranged on the base and used for clamping the bearing, and a clamping driving mechanism used for driving the two clamping pieces to approach or depart from each other; wherein,
the clamping piece comprises a clamping part at the upper end and a clamping arm at the lower end; the clamping part comprises an inner ring clamping part and an outer ring clamping part, wherein the inner ring clamping part is positioned at the upper part and used for clamping a bearing inner ring, and the outer ring clamping part is positioned at the lower part and used for clamping a bearing outer ring;
the clamping driving mechanism comprises a driving piece and a transmission assembly arranged between the two clamping pieces and used for transmitting the power of the driving piece; the transmission assembly comprises a screw rod, a screw nut and two connecting rods, wherein the screw rod penetrates through the base and is rotatably installed on the base; one end of the connecting rod is hinged to the screw rod nut, the other end of the connecting rod is hinged to the clamping arm, and the driving piece is connected with the lower end of the screw rod.
The working principle of the variable-diameter bearing clamp is as follows:
when the outer raceway of the bearing inner ring needs to be processed in a reinforced grinding mode, the center of the bearing inner ring penetrates through the two inner ring clamping portions, the driving piece drives the screw rod to rotate, so that the screw rod nut is driven to move along the axial direction of the screw rod, the connecting rod is driven to move, the two clamping pieces are driven to move away from each other until the two inner ring clamping portions abut against the bearing inner ring, and the bearing inner ring is clamped; then, the clamping mechanism is driven to rotate along the center of the clamping mechanism through the rotary driving mechanism, so that the inner ring of the bearing is driven to rotate, and finally, the reinforced grinding processing of the outer raceway of the inner ring of the bearing is realized; after the machining is finished, the rotary driving mechanism stops driving the clamping mechanism to rotate along the center of the rotary driving mechanism, the driving piece drives the screw rod to rotate reversely, so that the screw rod nut is driven to move downwards along the axial direction of the screw rod, the connecting rod is driven to move, the two clamping pieces are driven to move close to each other, until the two inner ring clamping portions loosen the bearing inner ring, and the machining of the bearing inner ring is finished.
When the inner raceway of the bearing outer ring needs to be processed in a reinforced grinding mode, the bearing outer ring is placed between the two outer ring clamping portions, the driving piece drives the screw rod to rotate, so that the screw rod nut is driven to move downwards along the axial direction of the screw rod, the connecting rod is driven to move, the two clamping pieces are driven to move close to each other until the two outer ring clamping portions abut against the bearing outer ring, and the bearing outer ring is clamped; then, the clamping mechanism is driven to rotate along the center of the clamping mechanism through the rotary driving mechanism, so that the outer ring of the bearing is driven to rotate, and finally, the reinforced grinding processing of the inner raceway of the outer ring of the bearing is realized; after the processing is finished, the rotary driving mechanism stops driving the clamping mechanism to rotate along the center of the rotary driving mechanism, the driving piece drives the screw rod to rotate reversely, so that the screw rod nut is driven to move along the axial direction of the screw rod, the connecting rod is driven to move, the two clamping pieces are driven to move close to each other, until the two outer ring clamping portions loosen the outer ring of the bearing, and the processing of the outer ring of the bearing is finished.
In a preferred aspect of the present invention, the clamping member portion and the clamping arm are both arc-shaped, and the arc-shaped is outwardly protruded relative to the screw rod; the arc radian of the inner ring clamping part is smaller than that of the outer ring clamping part. Through the mechanism, the clamping part is arranged in an arc shape, so that the clamping part can be matched with the bearing, and the clamping is more stable in the process of clamping the bearing; the arc radian of the inner ring clamping part is smaller than that of the outer ring clamping part, when the inner ring bearing is clamped, the inner ring clamping part with small radian can adapt to bearing inner rings with more specifications, the inner ring clamping part can penetrate through the bearing inner ring to clamp the bearing inner ring, the outer ring clamping part with large radian can improve the clamping area of the bearing outer ring, and the bearing outer ring is clamped more stably; the clamping arms are arc-shaped, so that the clamping distance between the two clamping arms is smaller, and the clamp can adapt to bearings with smaller specifications.
Furthermore, the lower end of the inner ring clamping portion and the lower end of the outer ring clamping portion are both provided with limiting portions, the limiting portions of the inner ring clamping portion extend along the bearing inner ring clamping direction, and the limiting portions of the outer ring clamping portion extend along the bearing outer ring clamping direction. The bearing clamping device is used for positioning the bearing more favorably in the process of clamping the bearing by arranging the limiting part.
Preferably, a guide assembly for guiding the relative movement of the two clamping arms on the base is arranged between the base and the clamping arms; the guide assembly comprises a sliding groove arranged on the base and a sliding block arranged on the clamping arm and matched with the sliding groove. Through setting up the direction subassembly, can make the slider make linear motion on the spout for the clamping piece is at the clamp bearing or the in-process of unclamping the bearing, and the motion is more stable.
Furthermore, limiting blocks are arranged at two ends of the sliding groove, and the sliding blocks can be prevented from being separated from the sliding groove in the mutual movement process.
Furthermore, the sliding block and the limiting block are both arc-shaped, and the arc-shaped is relatively protruded outwards from the center of the base; this makes the structure more compact.
In a preferred embodiment of the present invention, the power source of the rotary driving mechanism and the power source of the driving member are the same driving motor. The advantages of such an arrangement are: the rotation of the clamping mechanism and the clamping of the clamping piece to the bearing can be realized by using one driving motor, the mechanism is simplified, the structure is simpler, the manufacturing cost is greatly reduced, the energy consumption is reduced, and the resources are saved.
Preferably, the transmission assembly further comprises a cam arranged at the lower end of the screw rod and a sleeve arranged on the main shaft of the driving motor, and inner gear teeth matched with the cam are arranged inside the sleeve. Through driving motor drive sleeve rotation, the interior teeth of a cogwheel on the sleeve also follows the rotation to drive the cam and rotate, and then drive the lead screw and rotate, finally realize making the motion that is close to each other or keeps away from between the clamping piece, realize the clamp of bearing tight with loosen.
Preferably, the rotary driving mechanism further comprises a rotary transmission assembly for transmitting the power of the driving motor to the base and a control assembly for mutually switching the power source between the screw rod and the base; the rotary transmission assembly comprises an annular shaft neck sleeved on the sleeve, outer wheel teeth arranged on the outer surface of the sleeve and driven wheel teeth arranged on the inner surface of the annular shaft neck and matched with the outer wheel teeth; the annular journal is fixedly connected with the base. By the arrangement of the structure, the sleeve is driven to rotate by the driving motor, the outer gear on the sleeve also rotates along with the sleeve, so that the driven gear is driven to rotate, the annular shaft neck is driven to move, the rotation of the base is realized, the rotation of the clamping mechanism is realized by the rotation of the base, and finally, the reinforced grinding processing of the bearing is realized; through setting up control assembly, can realize making a round trip to switch the power supply of lead screw and base, can drive clamping mechanism through a driving motor and press from both sides tight bearing and drive clamping mechanism and rotate, realize pressing from both sides tightly and processing to the bearing.
Preferably, the control assembly comprises a driving cylinder arranged at the lower end of the driving motor and used for driving the sleeve to move back and forth along the axial direction of the sleeve; and the telescopic piece of the driving cylinder is connected with the driving motor. By adopting the mechanism, the driving cylinder can drive the telescopic piece to move downwards, the driving motor is driven to move downwards so as to drive the sleeve to move downwards along the axis of the sleeve, so that the inner gear teeth on the sleeve are separated from the cam, the outer gear teeth are matched with the driven gear, the driving motor is connected with the rotary transmission assembly, power is provided for the rotation of the clamping mechanism, when the driving cylinder drives the telescopic piece to move upwards, the sleeve moves upwards, the outer gear teeth on the sleeve are separated from the driven gear teeth, the inner gear teeth are matched with the cam, the connection of the power of the driving motor and the screw rod is realized, and power for clamping or loosening is provided for the clamping piece; the power source switching between the clamping piece and the clamping mechanism is realized by driving the air cylinder, and the flexibility of bearing clamping and processing is improved.
In a preferable embodiment of the present invention, a fixing sleeve is disposed at a lower end of the base, and the fixing sleeve is sleeved at an upper end of the annular journal and is fixedly connected to the annular journal. Through setting up fixed cover, be favorable to the dismantlement and the installation to base and annular journal.
In a preferred embodiment of the present invention, a through hole is formed in the base, the through hole extends along a direction of movement in which the clamping members are away from each other, and the lead screw passes through the through hole and is fixed to the base through a bearing support seat. The through holes greatly reduce the weight of the base, thereby reducing the load of the machine tool.
In a preferred embodiment of the present invention, the variable diameter bearing fixture further includes a bearing seat for supporting the annular journal, the bearing seat is fixed on the machine tool, and the annular journal is rotatably mounted on the bearing seat. By arranging the bearing seat, the annular shaft neck can run along the circumference and can be supported, so that the clamping mechanism can be fixedly arranged on the machine tool.
Furthermore, a bearing bush is arranged between the annular journal and the bearing seat, and the bearing seat has the advantages that the friction of the annular journal can be reduced, and the service life is prolonged.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the screw rod is driven to rotate by the driving piece, so that the screw rod nut is driven to move along the axial direction of the screw rod, the connecting rod is driven to move, the two clamping pieces are driven to move away from or close to each other, the bearing is clamped and released, and the reducing clamping of the bearing is realized.
2. According to the invention, the inner ring clamping part and the outer ring clamping part are arranged, so that the bearing inner ring and the bearing outer ring can be clamped, and the clamping device can be suitable for clamping bearings with different specifications and sizes, so that the reinforced grinding processing of the raceways of the bearing inner ring and the bearing outer ring is realized, and the clamping flexibility is high; the clamping piece is driven to move through the lead screw nut, so that the clamping bearing is stressed uniformly, and the surface of the bearing cannot be damaged in the process of clamping and processing the bearing.
Drawings
FIGS. 1-3 are schematic structural views of a first embodiment of a variable diameter bearing fixture according to the present invention; in which fig. 1 is an exploded view, fig. 2 is a perspective view, and fig. 3 is a sectional view.
Fig. 4 is a perspective view of the clamping member of the present invention.
Fig. 5 is a schematic perspective view of the transmission assembly of the present invention.
Fig. 6 is a schematic perspective view of a base in the present invention.
Fig. 7 is a schematic perspective view of the transmission assembly and the rotary transmission assembly according to the present invention.
Fig. 8 is a perspective view of the sleeve of the present invention.
Fig. 9 is a perspective view of the ring journal of the present invention.
Fig. 10 is a perspective view of a base of a second embodiment of a variable diameter bearing fixture according to the present invention.
Fig. 11 is a perspective view of a clamping mechanism of a third embodiment of a variable diameter bearing clamp according to the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Example 1
Referring to fig. 1 to 6, a variable-diameter bearing clamp includes a clamping mechanism for clamping a bearing and a rotary driving mechanism for driving the clamping mechanism to rotate; the clamping mechanism comprises a base 1, two clamping pieces 2 which are oppositely arranged on the base 1 and used for clamping a bearing, and a clamping driving mechanism used for driving the two clamping pieces 2 to approach or depart from each other; wherein the clamping piece 2 comprises a clamping part 2-1 at the upper end and a clamping arm 2-2 at the lower end; the clamping part 2-1 comprises an inner ring clamping part 2-11 positioned at the upper part and used for clamping a bearing inner ring and an outer ring clamping part 2-12 positioned at the lower part and used for clamping a bearing outer ring; the clamping driving mechanism comprises a driving piece and a transmission assembly arranged between the two clamping pieces 2 and used for transmitting the power of the driving piece; the transmission assembly comprises a screw rod 3 which penetrates through the base 1 and is rotatably installed on the base 1, a screw rod nut 4 which is matched with the screw rod 3, and two connecting rods 5 which are oppositely arranged between the screw rod nut 4 and the clamping piece 2; one end of the connecting rod 5 is hinged with the screw rod nut 4, the other end of the connecting rod is hinged with the clamping arm 2-2, and the driving piece is connected with the lower end of the screw rod 3.
Referring to fig. 1-4, the clamping member 2 and the clamping arm 2-2 are both arc-shaped, and the arc-shaped is protruded outwards relative to the screw rod 3; the arc radian of the inner ring clamping part 2-11 is smaller than the arc radian of the outer ring clamping part 2-12. Through the mechanism, the clamping part 2 is arc-shaped, so that the clamping part 2-1 can be matched with the bearing, and the clamping is more stable in the process of clamping the bearing; the arc radian of the inner ring clamping part 2-11 is smaller than that of the outer ring clamping part 2-12, when an inner ring bearing is clamped, the inner ring clamping part 2-11 with a small radian can adapt to more specifications of bearing inner rings, the inner ring clamping part 2-11 can penetrate through the bearing inner rings to clamp the bearing inner rings, the outer ring clamping part 2-12 with a large radian can improve the clamping area of the bearing outer rings, and the bearing outer rings are clamped more stably; the clamping arms 2-2 are arc-shaped, so that the clamping distance between the two clamping arms 2-2 is smaller, and the clamp can adapt to bearings with smaller specifications.
Referring to fig. 4, the lower ends of the inner ring clamping portions 2 to 11 and the lower ends of the outer ring clamping portions 2 to 12 are provided with limiting portions 2 to 13, the limiting portions 2 to 13 of the inner ring clamping portions 2 to 11 extend along the bearing inner ring clamping direction, and the limiting portions 2 to 13 of the outer ring clamping portions 2 to 12 extend along the bearing outer ring clamping direction. The bearing clamping device has the advantages that the limiting parts 2-13 are arranged, so that the bearing can be positioned more conveniently in the bearing clamping process.
Referring to fig. 1-6, a guide assembly for guiding the relative movement of the two clamping arms 2-2 on the base 1 is arranged between the base 1 and the clamping arms 2-2; the guide assembly comprises a sliding groove 1-1 arranged on the base 1 and a sliding block 2-3 arranged on the clamping arm 2-2 and matched with the sliding groove 1-1. Through the arrangement of the guide assembly, the sliding block 2-3 can move linearly on the sliding groove 1-1, so that the clamping piece 2 can move more stably in the process of clamping or loosening the bearing.
Referring to fig. 6, the two ends of the sliding groove 1-1 are provided with limiting blocks 6, which are used for preventing the sliding blocks 2-3 from separating from the sliding groove 1-1 during the mutual movement.
Referring to fig. 4 and 6, the sliding blocks 2 to 3 and the limiting block 6 are both arc-shaped, and the arc-shaped is relatively protruded outwards from the center of the base 1; this makes the structure more compact.
Referring to fig. 1-3, the power source of the rotary driving mechanism and the driving member is the same driving motor 7. The advantages of such an arrangement are: the rotation of the clamping mechanism and the clamping of the clamping piece 2 to the bearing can be realized by using one driving motor 7, the mechanism is simplified, the structure is simpler, the manufacturing cost is greatly reduced, the energy consumption is reduced, and the resources are saved.
Referring to fig. 1-8, the transmission assembly further includes a cam 8 disposed at a lower end of the lead screw 3 and a sleeve 9 disposed on a main shaft of the driving motor 7, and an inner gear 9-1 cooperating with the cam 8 is disposed inside the sleeve 9. The sleeve 9 is driven to rotate by the driving motor 7, and the inner gear teeth 9-1 on the sleeve 9 also rotate, so that the cam 8 is driven to rotate, the lead screw 3 is driven to rotate, the clamping pieces 2 are finally moved close to or far away from each other, and the bearing is clamped and loosened.
Referring to fig. 1 to 9, the rotary driving mechanism further includes a rotary transmission assembly for transmitting the power of the driving motor 7 to the base 1 and a control assembly for mutually switching the power source between the lead screw 3 or the base 1; the rotary transmission assembly comprises an annular journal 10 sleeved on the sleeve 9, outer gear teeth 9-2 arranged on the outer surface of the sleeve 9 and driven gear teeth 10-1 which are arranged on the inner surface of the annular journal 10 and are matched with the outer gear teeth 9-2; the annular journal 10 is fixedly connected to the base 1. By the arrangement of the structure, the sleeve 9 is driven to rotate by the driving motor 7, and the outer gear on the sleeve 9 also rotates along with the sleeve, so that the driven gear 10-1 is driven to rotate, the annular shaft neck 10 is driven to move, the rotation of the base 1 is realized, the rotation of the clamping mechanism is realized by the rotation of the base 1, and finally, the reinforced grinding processing of the bearing is realized; through setting up control assembly, can realize switching lead screw 3 and the power supply of base 1 back and forth, can drive clamping mechanism through a driving motor 7 and press from both sides tight bearing and drive clamping mechanism and rotate, realize pressing from both sides tightly and processing to the bearing.
Referring to fig. 1-3 and 7-9, the control assembly includes a driving cylinder 11 disposed at the lower end of the driving motor 7 for driving the sleeve 9 to move back and forth along the axial direction thereof; and the telescopic piece 11-1 of the driving air cylinder 11 is connected with the driving motor 7. By adopting the mechanism, the driving cylinder 11 can drive the telescopic part 11-1 to move downwards to drive the driving motor 7 to move downwards so as to drive the sleeve 9 to move downwards along the axis of the sleeve, so that the inner gear teeth 9-1 on the sleeve 9 are separated from the cam 8, the outer gear teeth 9-2 are matched with the driven gear, the driving motor 7 is connected with the rotary transmission assembly to provide power for the rotation of the clamping mechanism, when the driving cylinder 11 drives the telescopic part 11-1 to move upwards, the sleeve 9 moves upwards, the outer gear teeth 9-2 on the sleeve 9 are separated from the driven gear teeth 10-1, and the inner gear teeth 9-1 are matched with the cam 8 to realize the connection of the power of the driving motor 7 and the screw rod 3 and provide clamping or loosening power for the clamping part 2; the power source switching between the clamping part 2 and the clamping mechanism is realized by driving the air cylinder 11, and the flexibility of bearing clamping and processing is improved.
Referring to fig. 1-3 and 6-7, the lower end of the base 1 is provided with a fixing sleeve 12, and the fixing sleeve 12 is sleeved on the upper end of the annular journal 10 and is fixedly connected with the annular journal 10. The fixing sleeve 12 is arranged to facilitate the disassembly and assembly of the base 1 and the annular journal 10.
Referring to fig. 6, a through hole 1-2 is formed in the base 1, the through hole 1-2 extends along a direction of movement of the clamping members 2 away from each other, and the lead screw 3 passes through the through hole 1-2 and is fixed on the base 1 through a bearing support 15. The provision of the through-holes 1-2 greatly reduces the weight of the base 1, thereby reducing the load on the machine tool.
Referring to fig. 1 to 3 and 7, the variable diameter bearing fixture further includes a bearing seat 13 for supporting the annular journal 10, the bearing seat 13 is fixed on a machine tool, and the annular journal 10 is rotatably mounted on the bearing seat 13. By providing the bearing seat 13, the ring journal 10 runs circumferentially and serves to support the ring journal 10, so that the clamping mechanism can be mounted fixedly on the machine tool.
Referring to fig. 1 to 3 and 7, a bearing shell 14 is disposed between the annular journal 10 and the bearing seat 13, which is advantageous in reducing friction of the annular journal 10 and improving service life.
Referring to fig. 1 to 6, the working principle of the variable diameter bearing clamp is as follows:
when the outer raceway of the bearing inner ring needs to be processed in a reinforced grinding mode, the center of the bearing inner ring penetrates through the two inner ring clamping portions 2-11, the driving piece drives the screw rod 3 to rotate, so that the screw rod nut 4 is driven to move along the axis direction of the screw rod 3, the connecting rod 5 is driven to move, the two clamping pieces 2 are driven to move away from each other until the two inner ring clamping portions 2-11 abut against the bearing inner ring, and the bearing inner ring is clamped; then, the clamping mechanism is driven to rotate along the center of the clamping mechanism through the rotary driving mechanism, so that the inner ring of the bearing is driven to rotate, and finally, the reinforced grinding processing of the outer raceway of the inner ring of the bearing is realized; after the processing is finished, the rotary driving mechanism stops driving the clamping mechanism to rotate along the center of the rotary driving mechanism, the driving piece drives the screw rod 3 to rotate reversely, so that the screw rod nut 4 is driven to move downwards along the axis direction of the screw rod 3, the connecting rod 5 is driven to move, the two clamping pieces 2 are driven to move close to each other until the two inner ring clamping parts 2-11 loosen the bearing inner ring, and the processing of the bearing inner ring is finished.
When the inner raceway of the bearing outer ring needs to be processed in a reinforced grinding mode, the bearing outer ring is placed between the two outer ring clamping portions 2-12, the driving piece drives the screw rod 3 to rotate, so that the screw rod nut 4 is driven to move downwards along the axis direction of the screw rod 3, the connecting rod 5 is driven to move, the two clamping pieces 2 are driven to move close to each other until the two outer ring clamping portions 2-12 abut against the bearing outer ring, and the bearing outer ring is clamped; then, the clamping mechanism is driven to rotate along the center of the clamping mechanism through the rotary driving mechanism, so that the outer ring of the bearing is driven to rotate, and finally, the reinforced grinding processing of the inner raceway of the outer ring of the bearing is realized; after the processing is finished, the rotary driving mechanism stops driving the clamping mechanism to rotate along the center of the rotary driving mechanism, the driving piece drives the screw rod 3 to rotate reversely, so that the screw rod nut 4 is driven to move along the axis direction of the screw rod 3, the connecting rod 5 is driven to move, the two clamping pieces 2 are driven to move close to each other, until the two outer ring clamping parts 2-12 loosen the bearing outer ring, and the processing of the bearing outer ring is finished.
Example 2
Referring to fig. 10, the other structure in the present embodiment is the same as embodiment 1 except that: the screw rod 3 penetrates through the base 1 and is rotatably connected to the middle of the base 1 through a rolling bearing, and the through holes 1-2 are respectively formed in two ends of the base 1. With the arrangement, the through hole 1-2 can also reduce the weight of the base 1, thereby reducing the load of a machine tool; the lead screw 3 is directly rotatably installed on the base 1, the stability of the lead screw 3 on the base 1 can be ensured, and the rotation precision is improved.
Example 3
Referring to fig. 11, the other structure in the present embodiment is the same as embodiment 1 except that: the lower ends of the two clamping arms 2-2 are respectively hinged with the base 1. The screw rod 3 is driven to rotate by the driving piece, so that the screw rod nut 4 is driven to move along the axis of the screw rod 3, the connecting rod 5 is driven to move, the clamping arm 2-2 is driven to rotate back and forth around the hinged part at the lower end of the clamping arm, the movement that the clamping parts 2-1 are close to or far away from each other is realized, and the bearing is clamped.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (10)
1. A variable-diameter bearing clamp comprises a clamping mechanism for clamping a bearing and a rotary driving mechanism for driving the clamping mechanism to rotate; the clamping mechanism comprises a base, two clamping pieces which are oppositely arranged on the base and used for clamping the bearing, and a clamping driving mechanism used for driving the two clamping pieces to approach or depart from each other; it is characterized in that the preparation method is characterized in that,
the clamping piece comprises a clamping part at the upper end and a clamping arm at the lower end; the clamping part comprises an inner ring clamping part and an outer ring clamping part, wherein the inner ring clamping part is positioned at the upper part and used for clamping a bearing inner ring, and the outer ring clamping part is positioned at the lower part and used for clamping a bearing outer ring;
the clamping driving mechanism comprises a driving piece and a transmission assembly arranged between the two clamping pieces and used for transmitting the power of the driving piece; the transmission assembly comprises a screw rod, a screw nut and two connecting rods, wherein the screw rod penetrates through the base and is rotatably installed on the base; one end of the connecting rod is hinged to the screw rod nut, the other end of the connecting rod is hinged to the clamping arm, and the driving piece is connected with the lower end of the screw rod.
2. The variable diameter bearing clamp of claim 1, wherein said clamp portion and said clamp arm are each arcuate, said arcuate projecting outwardly relative to said lead screw; the arc radian of the inner ring clamping part is smaller than that of the outer ring clamping part.
3. The variable diameter bearing clamp according to claim 2, wherein the lower end of the inner ring clamping portion and the lower end of the outer ring clamping portion are both provided with a limiting portion; the limiting part of the inner ring clamping part extends along the bearing inner ring clamping direction, and the limiting part of the outer ring clamping part extends along the bearing outer ring clamping direction.
4. A variable diameter bearing clamp according to claim 3 wherein a guide assembly is provided between the base and the clamping arms for guiding the relative movement of the two clamping arms on the base; the guide assembly comprises a sliding groove arranged on the base and a sliding block arranged on the clamping arm and matched with the sliding groove.
5. The clamp of claim 4, wherein two ends of the sliding groove are provided with a limiting block.
6. The variable diameter bearing clamp of claim 1 or 5, wherein the power source of the rotary drive mechanism and the power source of the driving member are the same driving motor.
7. The variable diameter bearing clamp according to claim 6, wherein the transmission assembly further comprises a cam disposed at a lower end of the screw rod and a sleeve disposed on a main shaft of the driving motor, and the sleeve is internally provided with internal gear teeth cooperating with the cam.
8. The variable diameter bearing clamp of claim 7, wherein the rotary drive mechanism further comprises a rotary transmission assembly for transmitting power of a drive motor to the base and a control assembly for switching power sources between the lead screw and the base; the rotary transmission assembly comprises an annular shaft neck sleeved on the sleeve, outer wheel teeth arranged on the outer surface of the sleeve and driven wheel teeth arranged on the inner surface of the annular shaft neck and matched with the outer wheel teeth; the annular journal is fixedly connected with the base.
9. The variable diameter bearing clamp of claim 8, wherein the control assembly comprises a driving cylinder disposed at a lower end of the driving motor for driving the sleeve to move back and forth along an axial direction thereof; and the telescopic piece of the driving cylinder is connected with the driving motor.
10. The variable diameter bearing clamp of claim 9, wherein a fixing sleeve is disposed at a lower end of the base, and the fixing sleeve is sleeved on an upper end of the annular journal and fixedly connected to the annular journal;
the variable-diameter bearing clamp further comprises a bearing seat for supporting the annular journal, the bearing seat is fixed on a machine tool, and the annular journal is rotatably mounted on the bearing seat; and a bearing bush is arranged between the annular journal and the bearing block.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911225564.4A CN110961958B (en) | 2019-12-03 | 2019-12-03 | Diameter-variable bearing clamp |
| AU2020397384A AU2020397384B2 (en) | 2019-12-03 | 2020-07-31 | Variable-diameter bearing clamp |
| PCT/CN2020/106140 WO2021109602A1 (en) | 2019-12-03 | 2020-07-31 | Variable-diameter bearing clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911225564.4A CN110961958B (en) | 2019-12-03 | 2019-12-03 | Diameter-variable bearing clamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110961958A true CN110961958A (en) | 2020-04-07 |
| CN110961958B CN110961958B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911225564.4A Active CN110961958B (en) | 2019-12-03 | 2019-12-03 | Diameter-variable bearing clamp |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110961958B (en) |
| AU (1) | AU2020397384B2 (en) |
| WO (1) | WO2021109602A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110961958B (en) | 2020-12-08 |
| AU2020397384B2 (en) | 2023-11-09 |
| AU2020397384A1 (en) | 2022-07-28 |
| WO2021109602A1 (en) | 2021-06-10 |
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