WO2021109602A1

WO2021109602A1 - Variable-diameter bearing clamp

Info

Publication number: WO2021109602A1
Application number: PCT/CN2020/106140
Authority: WO
Inventors: 梁忠伟; 范立维; 吴子轩; 吴俊�; 刘晓初; 耿晨; 萧金瑞
Original assignee: 广州大学
Priority date: 2019-12-03
Filing date: 2020-07-31
Publication date: 2021-06-10
Also published as: CN110961958B; AU2020397384B2; AU2020397384A1; CN110961958A

Abstract

Disclosed in the present invention is a variable-diameter bearing clamp, comprising a clamping mechanism and a rotary driving mechanism. The clamping mechanism comprises a base, two clamping members oppositely provided on the base, and a clamping driving mechanism. Each clamping member comprises a clamping portion located at an upper end thereof and a clamping arm located at a lower end thereof, the clamping portion comprises an inner ring clamping portion located at an upper part thereof and an outer ring clamping portion located at a lower part thereof, the clamping driving mechanism comprises a driving member and a transmission assembly, the transmission assembly comprises a lead screw, a lead screw nut and two connecting rods, one end of each connecting rod is hinged to the lead screw nut, and the other end thereof is hinged to the clamping arm. The clamp can be adapted to bearings of different sizes for clamping, and strengthened grinding processing on raceways of a bearing inner ring and a bearing outer ring can be performed, thereby improving the working efficiency. Furthermore, the clamp has a simple structure design, effectively reducing manufacturing costs, and has no damage to a bearing surface of a bearing under process during clamping of the bearing.

Description

Variable-diameter bearing fixture

Technical field

The invention relates to a bearing clamp, in particular to a variable-diameter bearing clamp.

Background technique

Bearings are widely used in the mechanical field and are an important part of contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. According to the different friction properties of moving elements, bearings can be divided into rolling bearings and sliding bearings. Among them, the rolling bearing has been standardized and serialized, but compared with the sliding bearing, its radial size, vibration and noise are larger, and the price is also higher. Rolling bearings are generally composed of four parts: outer ring, inner ring, rolling element and cage. The machining accuracy and surface quality of the bearing directly affect the accuracy of the transmission and the life of the machine. In order to improve its surface quality, metal surface strengthening technology is often used to strengthen the surface of the inner raceway of the bearing outer ring and the outer raceway of the bearing inner ring.

At present, the mechanical three-jaw self-centering manual fixture used in the machinery industry to clamp the bearing workpiece can only process the inner raceway of the outer ring of the bearing. It has slow manual clamping of the workpiece, low efficiency, and difficult control of the clamping force, resulting in the workpiece Distortion and other shortcomings. The use of a centering fixture to clamp the bearing workpiece can only process the outer raceway of the bearing inner ring, and when processing bearing inner rings of different diameters, different numbers of washers need to be added, and the thickness of the washers may not be just enough. The tension of the ring will be too large or too small, and it will cause damage to the inner surface of the inner ring of the bearing if it is too small. If the tension is too small, the tension will be insufficient, and there will be a danger of falling when rotating; and the clamping and disassembly of the workpiece is cumbersome. The production efficiency is low. Although the existing electromagnetic centerless clamps can process both the inner ring of the bearing and the outer ring of the bearing, the structure of the clamp is complicated and the manufacturing cost is relatively high. In addition, the two support blocks will rub the bearing surface when rotating, causing the bearing surface to be damaged. damage.

technical problem

The purpose of the present invention is to overcome the above-mentioned problems and provide a variable-diameter bearing clamp, which can be adapted to clamp bearings of different specifications and sizes, and can achieve intensified grinding processing on the raceways of the bearing inner ring and the bearing outer ring. , Improve the work efficiency; in addition, the fixture has a simple structure design, which effectively saves manufacturing costs, and does not damage the bearing surface during the process of clamping and processing the bearing.

Technical solutions

The purpose of the present invention is achieved through the following technical solutions:

A variable-diameter bearing clamp includes a clamping mechanism for clamping a bearing and a rotation driving mechanism for driving the clamping mechanism to rotate; the clamping mechanism includes a base, and two are disposed oppositely on the base A clamping member for clamping the bearing and a clamping drive mechanism for driving the two clamping members to approach or move away from each other; wherein,

The clamping member includes a clamping part at the upper end and a clamping arm at the lower end; wherein, the clamping part includes an inner ring clamping part at the upper part for clamping the inner ring of the bearing and a lower part for clamping The outer ring clamping part of the bearing outer ring;

The clamping driving mechanism includes a driving member and a transmission assembly arranged between the two clamping members for transmitting the power of the driving member; the transmission assembly includes passing through the base and rotatably mounted on the base The upper screw rod, the screw nut that cooperates with the screw rod, and two connecting rods arranged oppositely between the screw nut and the clamping member; one end of the connecting rod is connected to the screw nut The other end is hinged with the clamping arm, and the driving member is connected with the lower end of the screw rod.

The working principle of the above variable diameter bearing fixture is:

When it is necessary to strengthen the grinding process of the outer raceway of the inner ring of the bearing, pass the center of the inner ring of the bearing through the two inner ring clamping parts, and the driving part drives the screw to rotate, thereby driving the screw nut to move in the direction of the screw axis. The connecting rod moves, and then drives the two clamping parts to move away from each other until the two inner ring clamping parts abut against the bearing inner ring to realize the clamping of the bearing inner ring; then the rotation driving mechanism drives the clamping mechanism to move away from each other. Rotate around its center, and then drive the rotation of the bearing inner ring, and finally realize the intensified grinding of the outer raceway of the bearing inner ring; after the processing is completed, the rotary drive mechanism stops driving the clamping mechanism to rotate along its center, and the drive member drives The screw rod rotates in the reverse direction, thereby driving the screw nut to move down along the axis of the screw rod, driving the connecting rod to move, and then driving the two clamping parts to move closer to each other until the two inner ring clamping parts loosen the bearing. To complete the machining of the inner ring of the bearing.

When it is necessary to intensify the grinding of the inner raceway of the outer ring of the bearing, place the outer ring of the bearing between the two outer ring clamping parts, and the driving part drives the screw to rotate, thereby driving the screw nut to move down the direction of the screw axis. The connecting rod moves, and then drives the two clamping parts to move closer to each other until the two outer ring clamping parts abut the outer ring of the bearing to realize the clamping of the outer ring of the bearing; then the rotation drive mechanism drives the clamping mechanism along the edge Rotate around the center, and then drive the rotation of the outer ring of the bearing, and finally realize the intensified grinding of the inner raceway of the outer ring of the bearing; after the processing is completed, the rotary drive mechanism stops driving the clamping mechanism to rotate along its center, and the drive member drives The screw rod rotates in the reverse direction, thereby driving the screw nut to move along the axis of the screw rod, driving the connecting rod to move, and then driving the two clamping parts to move closer to each other until the two outer ring clamping parts loosen the outside of the bearing Finish the machining of the outer ring of the bearing.

A preferred solution of the present invention, wherein the clamping member part and the clamping arm are both arc-shaped, and the arc-shape protrudes outward relative to the screw rod; the inner-ring clamping part is arc-shaped The arc is smaller than the arc arc of the outer ring clamping part. Through the above mechanism, since the clamping part is set in an arc shape, it can facilitate the cooperation of the clamping part and the bearing, and make the clamping more stable during the process of clamping the bearing; the arc of the inner ring clamping part is smaller than the outer ring clamping When clamping the inner ring bearing, the small arc inner ring clamping part can adapt to more specifications of the bearing inner ring, which is beneficial to the inner ring clamping part to pass through the bearing inner ring to achieve clamping. The large-curved outer ring clamping part can increase the clamping area of the bearing outer ring and hold the bearing outer ring more firmly; the clamping arm is set in an arc shape, which can make the clamping distance between the two clamping arms Smaller, so that the fixture can adapt to smaller bearings.

Further, 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, and the limiting portion of the inner ring clamping portion extends along the clamping direction of the bearing inner ring, so The limiting portion of the outer ring clamping portion extends along the clamping direction of the bearing outer ring. Its function is that by setting the limit part, it is more conducive to the positioning of the bearing in the process of clamping the bearing.

Preferably, a guide assembly for guiding the relative movement of the two clamping arms on the base is provided between the base and the clamping arm; the guide assembly includes a sliding groove provided on the base And a sliding block arranged on the clamping arm and matched with the sliding groove. By providing the guide assembly, the sliding block can move linearly on the sliding groove, so that the movement of the clamping piece is more stable during the process of clamping the bearing or loosening the bearing.

Further, stop blocks are provided on both ends of the sliding groove, which function is to prevent the sliding blocks from being separated from the sliding groove during mutual movement.

Further, the sliding block and the limiting block are both arc-shaped, and the arc-shape protrudes outward relative to the center of the base; this can make the structure more compact.

In a preferred solution of the present invention, the power source of the rotation driving mechanism and the driving member is the same driving motor. The advantage of this arrangement is that the rotation of the clamping mechanism and the clamping of the bearing by the clamping member can be realized by using a driving motor, which simplifies the mechanism, makes the structure simpler, greatly reduces manufacturing costs, reduces energy consumption, and saves Up resources.

Preferably, the transmission assembly further includes a cam arranged at the lower end of the screw rod and a sleeve arranged on the main shaft of the driving motor, and internal gear teeth that cooperate with the cam are arranged inside the sleeve. By driving the motor to drive the sleeve to rotate, the inner gear on the sleeve also rotates, thereby driving the cam to rotate, and then driving the screw to rotate, and finally realize the movement of the clamping parts close to or away from each other, and realize the clamping and clamping of the bearing. release.

Preferably, the rotation driving mechanism further includes a rotation transmission assembly for transmitting the power of the driving motor to the base and a control assembly for switching the power source between the screw rod or the base; the rotation transmission assembly It includes an annular journal sleeved on the sleeve, outer gear teeth provided on the outer surface of the sleeve, and driven gear teeth provided on the inner surface of the annular journal and matched with the outer gear teeth; The annular journal is fixedly connected with the base. With the above structure, the sleeve is driven to rotate by the drive motor, and the external gear on the sleeve also rotates, thereby driving the driven gear teeth to rotate, and then driving the ring journal to move, realizing the rotation of the base, and realizing the clamping mechanism through the rotation of the base The rotation of the bearing can finally realize the intensified grinding process of the bearing; by setting the control assembly, the power source of the screw rod and the base can be switched back and forth, and a driving motor can drive the clamping mechanism to clamp the bearing and drive the clamping mechanism to rotate. Clamping and processing of bearings.

Preferably, the control assembly includes a drive cylinder arranged at the lower end of the drive motor for driving the sleeve to move back and forth along its axis; the telescopic part of the drive cylinder is connected to the drive motor. With the above mechanism, the telescopic member can be driven to move downward by driving the air cylinder, and the driving motor is also driven downward to drive the sleeve to move down along its axis, so that the inner gear teeth on the sleeve are separated from the cam, and the outer gear teeth are separated from the follower. The gears are matched to realize the engagement of the drive motor and the rotating transmission assembly to provide power for the rotation of the clamping mechanism. When the driving cylinder drives the telescopic part to move upwards, the sleeve moves upwards, and the outer gear teeth on the sleeve are separated from the driven gear teeth. The gear teeth cooperate with the cam to realize the engagement between the power of the drive motor and the screw rod, and provide the power for clamping or unclamping the clamping part; the switching of the power source between the clamping part and the clamping mechanism is realized by the driving cylinder, which improves The flexibility of bearing clamping and processing is improved.

In a preferred solution of the present invention, a fixing sleeve is provided at the lower end of the base, and the fixing sleeve is sleeved on the upper end of the annular journal and is fixedly connected with the annular journal. By setting the fixing sleeve, it is advantageous to disassemble and install the base and the ring journal.

A preferred solution of the present invention, wherein the base is provided with a through hole, the through hole extends along the direction of movement of the clamping member away from each other, and the screw rod passes through the through hole and is supported by a bearing. The seat is fixed on the base. Setting the through hole greatly reduces the weight of the base, thereby reducing the load of the machine tool.

In a preferred solution 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 On the bearing seat. By setting the bearing seat, the ring-shaped journal is realized to run along the circumference and is used to support the ring-shaped journal, so that the clamping mechanism can be fixedly installed on the machine tool.

Further, a bearing bush is arranged between the annular journal and the bearing seat, which has the advantage of reducing the friction of the annular journal and improving the service life.

Beneficial effect

Compared with the prior art, the present invention has the following beneficial effects:

1. In the present invention, the screw rod is driven to rotate by the driving part, thereby driving the screw nut to move along the axis of the screw rod, driving the connecting rod to move, and then driving the two clamping parts to move away from or close to each other to realize the alignment. The clamping and loosening of the bearing can realize the variable diameter clamping of the bearing. The design structure of the invention is simple, and the manufacturing cost is effectively saved.

2. In the present invention, by providing the inner ring clamping part and the outer ring clamping part, the inner ring of the bearing and the outer ring of the bearing can be clamped, and the bearing can be clamped to different specifications and sizes to realize the clamping of the inner ring of the bearing. The intensified grinding process of the raceway with the outer ring of the bearing provides high clamping flexibility; the clamping piece is driven by the screw nut to make the clamping bearing evenly stressed, and the bearing surface will not be damaged during the clamping and processing of the bearing.

Description of the drawings

1 to 3 are structural schematic diagrams of the first specific embodiment of a variable-diameter bearing clamp in the present invention; among them, FIG. 1 is an exploded view, FIG. 2 is a perspective view, and FIG. 3 is a cross-sectional view.

Fig. 4 is a schematic diagram of the three-dimensional structure of the clamping member in the present invention.

Fig. 5 is a schematic diagram of the three-dimensional structure of the transmission assembly in the present invention.

Fig. 6 is a schematic diagram of the three-dimensional structure of the base in the present invention.

FIG. 7 is a schematic diagram of the three-dimensional structure of the transmission assembly and the rotation transmission assembly in the present invention.

Fig. 8 is a schematic diagram of the three-dimensional structure of the sleeve of the present invention.

Fig. 9 is a schematic diagram of the three-dimensional structure of the annular journal in the present invention.

Fig. 10 is a schematic diagram of a three-dimensional structure of a base of a second specific embodiment of a variable-diameter bearing clamp in the present invention.

FIG. 11 is a schematic diagram of a three-dimensional structure of a clamping mechanism of a third specific embodiment of a variable-diameter bearing clamp in the present invention.

Embodiments of the present invention

In order to enable those skilled in the art to understand the technical solutions of the present invention well, the present invention will be further described below in conjunction with the embodiments and the drawings, but the embodiments of the present invention are not limited thereto.

Example 1

Referring to Figures 1 to 6, a variable-diameter bearing fixture includes a clamping mechanism for clamping the bearing and a rotary drive mechanism for driving the clamping mechanism to rotate; the clamping mechanism includes a base 1, two A clamping member 2 for clamping the bearing and a clamping drive mechanism for driving the two clamping members 2 to be close to or away from each other; wherein the clamping member 2 includes A clamping part 2-1 at the upper end and a clamping arm 2-2 at the lower end; wherein the clamping part 2-1 includes an inner ring clamping part 2-11 at the upper part for clamping the inner ring of the bearing, and The outer ring clamping portion 2-12 is located at the lower part for clamping the outer ring of the bearing; the clamping driving mechanism includes a driving member and a device arranged between the two clamping members 2 for transmitting the power of the driving member Transmission assembly; the transmission assembly includes a screw rod 3 that passes through the base 1 and is rotatably mounted on the base 1, a screw nut 4 that cooperates with the screw 3, and two oppositely arranged on the wire The connecting rod 5 between the rod nut 4 and the clamping member 2; one end of the connecting rod 5 is hinged with the screw nut 4, the other end is hinged with the clamping arm 2-2, and the driving member is hinged with The lower end of the screw rod 3 is connected.

Referring to Figures 1 to 4, the clamping member 2 and the clamping arm 2-2 are both arc-shaped, and the arc protrudes outward relative to the screw rod 3; the inner ring clamps The arc of the part 2-11 is smaller than the arc of the outer ring clamping part 2-12. Through the above mechanism, since the clamping part 2 is set in an arc shape, it can facilitate the cooperation of the clamping part 2-1 and the bearing, which makes the clamping more stable during the process of clamping the bearing; the inner ring clamping part 2-11 arc The arc is smaller than the 2-12 arc of the outer ring clamping part. When clamping the inner ring bearing, the small arc inner ring clamping part 2-11 can adapt to more specifications of the bearing inner ring, which is beneficial to the inner ring clamping The tight part 2-11 passes through the inner ring of the bearing to achieve clamping. The large arc outer ring clamping part 2-12 can increase the clamping area of the bearing outer ring and clamp the bearing outer ring more firmly; The arm 2-2 is arranged in an arc shape, which can make the clamping distance between the two clamping arms 2-2 smaller, so that the clamp can adapt to smaller-sized bearings.

4, the lower end of the inner ring clamping portion 2-11 and the lower end of the outer ring clamping portion 2-12 are both provided with a limiting portion 2-13, and the inner ring clamping portion 2-11 is limited The positioning portion 2-13 extends along the clamping direction of the bearing inner ring, and the limiting portion 2-13 of the outer ring clamping portion 2-12 extends along the clamping direction of the bearing outer ring. Its function is that by setting the limit part 2-13, it is more conducive to the positioning of the bearing in the process of clamping the bearing.

Referring to Figures 1 to 6, there is a guide assembly between the base 1 and the clamping arm 2-2 for guiding the relative movement of the two clamping arms 2-2 on the base 1; The guide assembly includes a sliding groove 1-1 arranged on the base 1 and a sliding block 2-3 arranged on the clamping arm 2-2 to match the sliding groove 1-1. By providing the guide assembly, the slider 2-3 can move linearly on the sliding groove 1-1, so that the clamping member 2 can move more stably during the process of clamping the bearing or releasing the bearing.

Referring to Fig. 6, there are stop blocks 6 on both ends of the sliding groove 1-1, the function of which is to prevent the sliding blocks 2-3 from separating from the sliding groove 1-1 during mutual movement.

4 and 6, the slider 2-3 and the limiting block 6 are both arc-shaped, and the arc is relatively convex outward from the center of the base 1; this can make the structure more compact.

Referring to Figs. 1 to 3, the power source of the rotary driving mechanism and the driving member is the same driving motor 7. The advantage of this arrangement is that the rotation of the clamping mechanism and the clamping of the bearing by the clamping member 2 can be realized by using a driving motor 7, which simplifies the mechanism, makes the structure simpler, greatly reduces manufacturing costs, and reduces energy consumption. , Saving resources.

1 to 8, the transmission assembly further includes a cam 8 arranged at the lower end of the screw rod 3 and a sleeve 9 arranged on the main shaft of the driving motor 7, and the sleeve 9 is provided with the The cam 8 cooperates with internal gear teeth 9-1. By driving the motor 7 to drive the sleeve 9 to rotate, the inner gear 9-1 on the sleeve 9 also rotates, thereby driving the cam 8 to rotate, which in turn drives the screw 3 to rotate, and finally realizes that the clamping members 2 are closer to or farther away from each other. The movement of the bearing realizes the clamping and loosening of the bearing.

1 to 9, the rotation drive mechanism also includes a rotation transmission assembly that transmits the power of the drive motor 7 to the base 1, and a power source for switching the screw 3 or the base 1 to each other. Control assembly; the rotation transmission assembly includes an annular journal 10 sleeved on the sleeve 9, an outer gear 9-2 arranged on the outer surface of the sleeve 9 and an inner ring set on the annular journal 10 The driven gear teeth 10-1 on the surface and matched with the outer gear teeth 9-2; the annular journal 10 is fixedly connected to the base 1. With the above structure, the sleeve 9 is driven to rotate by the drive motor 7, and the external gear on the sleeve 9 also rotates, thereby driving the driven gear teeth 10-1 to rotate, thereby driving the annular journal 10 to move to realize the rotation of the base 1. The rotation of the clamping mechanism is realized by the rotation of the base 1, and finally the intensified grinding of the bearing is realized; by setting the control assembly, the power source of the screw 3 and the base 1 can be switched back and forth, and the clamping mechanism can be driven by a driving motor 7 Clamp the bearing and drive the clamping mechanism to rotate to realize the clamping and processing of the bearing.

Referring to Figures 1-3 and Figures 7-9, the control assembly includes a drive cylinder 11 arranged at the lower end of the drive motor 7 for driving the sleeve 9 to move back and forth along its axis; the drive The telescopic part 11-1 of the air cylinder 11 is connected to the drive motor 7. With the above mechanism, the telescopic member 11-1 can be driven to move downward by driving the air cylinder 11, and the driving motor 7 is also driven downward to drive the sleeve 9 to move downward along its axis, so that the inner gear 9- on the sleeve 9 1 is separated from the cam 8, and the outer gear 9-2 is matched with the driven gear, so as to realize the engagement of the driving motor 7 with the rotating transmission assembly, and provide power for the rotation of the clamping mechanism. When the driving cylinder 11 drives the telescopic part 11-1 to move upward , The sleeve 9 moves upward, the outer gear 9-2 on the sleeve 9 separates from the driven gear 10-1, and the inner gear 9-1 cooperates with the cam 8 to realize the engagement of the power of the drive motor 7 with the screw 3 , To provide clamping or unclamping power for the clamping part 2; the switching of the power source between the clamping part 2 and the clamping mechanism is realized by driving the cylinder 11, which improves the flexibility of bearing clamping and processing.

1 to 3 and 6 to 7, the lower end of the base 1 is provided with a fixing sleeve 12, the fixing sleeve 12 is sleeved on the upper end of the annular journal 10 and is fixedly connected with the annular journal 10 . By providing the fixing sleeve 12, the disassembly and installation of the base 1 and the annular journal 10 are facilitated.

6, the base 1 is provided with a through hole 1-2, the through hole 1-2 extends along the direction of movement of the clamping member 2 away from each other, and the screw rod 3 passes through the through hole 1-2. The hole 1-2 is fixed on the base 1 through a bearing support 15. The arrangement of the through holes 1-2 greatly reduces the weight of the base 1, thereby reducing the load of the machine tool.

Referring to Figures 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 the machine tool, and the annular journal 10 It is rotatably mounted on the bearing seat 13. By providing the bearing seat 13, it is realized that the annular journal 10 runs along the circumference and serves to support the annular journal 10, so that the clamping mechanism can be fixedly installed on the machine tool.

Referring to Figs. 1 to 3 and 7, a bearing bush 14 is provided between the annular journal 10 and the bearing seat 13. The advantage is that the friction of the annular journal 10 can be reduced and the service life is improved.

Refer to Figure 1 to Figure 6, the working principle of the above variable diameter bearing fixture is:

When it is necessary to intensify the grinding of the outer raceway of the inner ring of the bearing, pass the center of the inner ring of the bearing through the two inner ring clamping parts 2-11, and the driver drives the screw 3 to rotate, thereby driving the screw nut 4 along the screw 3 Move in the axial direction, drive the connecting rod 5 to move, and then drive the two clamping parts 2 to move away from each other, until the two inner ring clamping parts 2-11 abut the bearing inner ring to realize the clamping of the bearing inner ring ; Then the rotary drive mechanism drives the clamping mechanism to rotate along its center, and then drives the rotation of the inner ring of the bearing, and finally realizes the intensified grinding of the outer raceway of the inner ring of the bearing; after the processing is completed, the rotary drive mechanism stops driving the clamping The mechanism rotates along its center, and the driving member drives the screw rod 3 to rotate in the opposite direction, thereby driving the screw nut 4 to move down along the axis of the screw rod 3, driving the connecting rod 5 to move, and then driving the two clamping parts 2 to interact with each other. Move closer until the two inner ring clamping parts 2-11 loosen the bearing inner ring to complete the processing of the bearing inner ring.

When the inner raceway of the outer ring of the bearing needs to be strengthened and polished, the outer ring of the bearing is placed between the two outer ring clamping parts 2-12, and the driver drives the screw 3 to rotate, thereby driving the screw nut 4 along the screw 3 Moving down in the axial direction drives the connecting rod 5 to move, and then drives the two clamping parts 2 to move closer to each other until the two outer ring clamping parts 2-12 abut the outer ring of the bearing to realize the clamping of the outer ring of the bearing ; Then the rotary drive mechanism drives the clamping mechanism to rotate along its center, and then drives the rotation of the outer ring of the bearing, and finally realizes the intensified grinding of the inner raceway of the outer ring of the bearing; after the processing is completed, the rotary drive mechanism stops driving the clamping The mechanism rotates along its center, and the driving member drives the screw rod 3 to rotate in the opposite direction, thereby driving the screw nut 4 to move along the axis of the screw rod 3, driving the connecting rod 5 to move, and then driving the two clamping parts 2 to interact with each other. Move closer until the two outer ring clamping parts 2-12 loosen the outer ring of the bearing to complete the processing of the outer ring of the bearing.

Example 2

Referring to Figure 10, the other structure in this embodiment is the same as that of Embodiment 1, except that: the screw rod 3 passes through the base 1 and is rotatably connected to the middle of the base 1 through a rolling bearing, and the through hole 1-2 are respectively arranged at both ends of the base 1. With this arrangement, the through holes 1-2 can also reduce the weight of the base 1, thereby reducing the load of the machine tool; the screw 3 is directly mounted on the base 1 by rotating, and it can also ensure that the screw 3 is on the base 1. Stability and improved rotation accuracy.

Example 3

Referring to FIG. 11, the other structure in this embodiment is the same as that in Embodiment 1, except that the lower ends of the two clamping arms 2-2 are hinged to the base 1 respectively. The screw rod 3 is driven to rotate by the driving part, thereby driving the screw nut 4 to move along the axis of the screw rod 3, and driving the connecting rod 5 to move, thereby driving the clamping arm 2-2 to rotate back and forth around the hinge at its lower end to realize clamping The tight parts 2-1 move closer to or away from each other, thereby realizing the clamping of the bearing.

The above are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above content, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention, All should be equivalent replacement methods, and they are all included in the protection scope of the present invention.

Claims

A variable-diameter bearing clamp includes a clamping mechanism for clamping a bearing and a rotation driving mechanism for driving the clamping mechanism to rotate; the clamping mechanism includes a base, and two are disposed oppositely on the base A clamping piece for clamping the bearing and a clamping drive mechanism for driving the two clamping pieces to approach or move away from each other; characterized in that,

The clamping member includes a clamping part at the upper end and a clamping arm at the lower end; wherein, the clamping part includes an inner ring clamping part at the upper part for clamping the inner ring of the bearing and a lower part for clamping The outer ring clamping part of the bearing outer ring;

The clamping driving mechanism includes a driving member and a transmission assembly arranged between the two clamping members for transmitting the power of the driving member; the transmission assembly includes passing through the base and rotatably mounted on the base The upper screw rod, the screw nut that cooperates with the screw rod, and two connecting rods arranged oppositely between the screw nut and the clamping member; one end of the connecting rod is connected to the screw nut The other end is hinged with the clamping arm, and the driving member is connected with the lower end of the screw rod.
The variable-diameter bearing clamp according to claim 1, wherein the clamping part and the clamping arm are both arc-shaped, and the arc is relatively convex to the screw rod. Out; the arc of the inner ring clamping portion is smaller than the arc of the outer ring clamping portion.
The variable-diameter bearing clamp according to claim 2, wherein the lower end of the inner ring clamping part and the lower end of the outer ring clamping part are both provided with a limit part; the inner ring clamp The limiting portion of the tight portion extends along the clamping direction of the bearing inner ring, and the limiting portion of the outer ring clamping portion extends along the clamping direction of the bearing outer ring.
The variable-diameter bearing clamp according to claim 3, characterized in that, between the base and the clamping arm is provided with a device for guiding the relative movement of the two clamping arms on the base. Guide assembly; the guide assembly includes a sliding groove provided on the base and a sliding block provided on the clamping arm and matched with the sliding groove.
The variable-diameter bearing clamp according to claim 4, wherein a limit block is provided on both ends of the sliding groove.
The variable-diameter bearing clamp according to claim 1 or 5, wherein the power source of the rotary driving mechanism and the driving member is the same driving motor.
The variable-diameter bearing clamp according to claim 6, wherein 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, the The sleeve is provided with internal gear teeth that cooperate with the cam.
The variable-diameter bearing clamp according to claim 7, wherein the rotation drive mechanism further comprises a rotation transmission assembly for transmitting the power of the driving motor to the base, and a rotation transmission assembly for switching the screw rods mutually Or the control assembly of the power source between the bases; the rotation transmission assembly includes an annular journal sleeved on the sleeve, external gear teeth arranged on the outer surface of the sleeve, and set on the annular journal The inner surface of the driven gear tooth is matched with the outer gear tooth; the annular journal is fixedly connected with the base.
The variable-diameter bearing clamp according to claim 8, wherein the control assembly includes a driving cylinder arranged at the lower end of the driving motor for driving the sleeve to move back and forth along its axis. The telescopic part of the drive cylinder is connected to the drive motor.
The variable-diameter bearing fixture according to claim 9, wherein a fixing sleeve is provided at the lower end of the base, and the fixing sleeve is sleeved on the upper end of the annular journal and fixed with the annular journal connection;

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; the annular journal A bearing bush is arranged between the bearing seat.