阅读说明：本技术 一种便于高度调节的轴承座 (Bearing frame convenient to altitude mixture control ) 是由 周永军 李海山 董玉伟 宋星星 谢玉华 梁玉龙 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种便于高度调节的轴承座,涉及机械传动技术领域,解决了现有的可调高度轴承座一般是通过螺纹的形式对轴承座的高度进行调节,但是在使用中不能对轴承座进行良好的锁紧,导致在使用中轴承座晃动影响轴承的传动精度,降低了轴承的使用寿命的问题,包括轴承外安装座；轴承内座,轴承内座滑动连接在轴承外安装座的中部；高度调节操作件,高度调节操作件共设置有两组,两组高度调节操作件分别转动连接在轴承外安装座的右侧上部前后端面。本发明可以对轴承内座进行紧固连接,有效避免轴承内座晃动,提高轴承的传动机构和使用寿命,无论轴承座的安装方向如何都能进行良好的操作,提高了操作便利性。(The invention discloses a bearing seat convenient for height adjustment, relates to the technical field of mechanical transmission, and solves the problems that the height of the bearing seat is generally adjusted in a threaded mode, but the bearing seat cannot be well locked in use, so that the transmission precision of a bearing is influenced by the shaking of the bearing seat in use, and the service life of the bearing is shortened in use of the existing bearing seat with adjustable height; the bearing inner seat is connected to the middle part of the bearing outer mounting seat in a sliding manner; the height adjusting operation parts are arranged in two groups, and the two groups of height adjusting operation parts are respectively rotatably connected to the front end face and the rear end face of the upper portion of the right side of the bearing outer mounting seat. The invention can fasten and connect the bearing inner seat, effectively avoid the bearing inner seat from shaking, improve the transmission mechanism of the bearing and prolong the service life of the bearing, can carry out good operation no matter how the bearing seat is arranged, and improve the operation convenience.)

1. The utility model provides a bearing frame convenient to altitude mixture control which characterized in that: comprises a bearing outer mounting seat (1);

the bearing inner seat (5) is connected to the middle of the bearing outer mounting seat (1) in a sliding manner;

the height adjusting operation parts (2) are arranged in two groups, and the two groups of height adjusting operation parts (2) are respectively and rotatably connected to the front end face and the rear end face of the upper part of the right side of the bearing outer mounting seat (1);

the height adjusting mechanism is arranged at the upper part of the bearing outer mounting seat (1), and the height adjusting operating part (2) drives the bearing inner seat (5) to slide up and down through the height adjusting mechanism;

the locking operation parts (6), the locking operation parts (6) are arranged in two groups, and the two groups of locking operation parts (6) are respectively connected to the front end face and the rear end face of the lower part of the bearing inner seat (5) in a rotating mode;

the locking sliding blocks (9) are arranged in two groups, and the two groups of locking sliding blocks (9) are respectively connected to the left side and the right side of the bearing inner seat (5) in a sliding manner;

and the locking driving mechanism is arranged in the bottom of the bearing inner seat (5), and the locking operation part (6) drives the two groups of locking sliding blocks (9) to synchronously and reversely slide through the locking driving mechanism.

2. A bearing housing for facilitating height adjustment according to claim 1, wherein: the bearing outer mounting seat (1) further comprises:

the height adjusting guide pieces (101), the height adjusting guide pieces (101) are arranged inside the left side and the right side of the bearing outer mounting seat (1);

the bearing inner seat (5) also comprises:

inner support guide way (501), inner support guide way (501) set up in the left and right sides of bearing inner support (5), and height control guide (101) sliding connection is inside inner support guide way (501).

3. A bearing housing for facilitating height adjustment according to claim 1, wherein: the height adjusting mechanism further comprises:

the height adjusting driving bevel gear (201), the height adjusting driving bevel gear (201) is coaxially and fixedly connected to the inner side of the height adjusting operation part (2);

the height adjusting driving screw (3), the height adjusting driving screw (3) is actively connected to the inner side of the top of the bearing outer mounting seat (1);

the height adjusting drive bevel gears (201) are meshed with the height adjusting driven bevel gears (301) simultaneously to form a bevel gear transmission mechanism.

4. A bearing housing for facilitating height adjustment according to claim 3, wherein: the height adjusting mechanism further comprises:

the height adjusting driving sliding block (302) is in threaded transmission connection with the height adjusting driving screw rod (3), and a screw rod and nut transmission pair is formed between the height adjusting driving sliding block (302) and the height adjusting driving screw rod (3).

5. A bearing housing to facilitate height adjustment according to claim 4, wherein: the height adjusting mechanism further comprises:

height control connecting rod (4), height control connecting rod (4) arrange in pairs, height control connecting rod (4) are provided with two pairs altogether, and every constitutes jointly to crossing hinged joint between height control connecting rod (4) and cuts fork mechanism, and two sets of fork mechanisms of cutting are end to end constitutes two-stage formula jointly and cuts fork mechanism, and a set of height control connecting rod (4) of top front portion and height control drive slider (302) hinged joint, and two sets of height control connecting rod (4) lower part of bottom is connected with bearing inner race (5).

6. A bearing housing for facilitating height adjustment according to claim 1, wherein: the locking driving mechanism further comprises:

the locking driving bevel gear (601), the locking driving bevel gear (601) is coaxially and fixedly connected to the rear part of the locking operating part (6);

the locking driving lead screw (7), the locking driving lead screw (7) is in threaded transmission connection with the inside of the bearing inner seat (5);

the locking driven bevel gears (701) are coaxially and fixedly connected to the bottoms of the locking driving lead screws (7), and the two groups of locking driving bevel gears (601) are meshed with the locking driven bevel gears (701) simultaneously to form a bevel gear transmission mechanism.

7. A bearing housing for facilitating height adjustment according to claim 6, wherein: the locking driving mechanism further comprises:

the locking driving sliding block (8) is connected to the lower portion of the inner portion of the bearing inner seat (5) in a sliding mode, and the locking driving lead screw (7) and the locking driving sliding block (8) are meshed to form a lead screw nut transmission pair.

8. A bearing housing for facilitating height adjustment according to claim 7, wherein: the locking driving mechanism further comprises:

the locking block guide piece (902) and the locking block guide piece (902) are arranged in two groups, the two groups of locking block guide pieces (902) are respectively arranged on the upper end surface and the lower end surface of the locking sliding block (9), and the locking sliding block (9) is connected with the bearing inner seat (5) in a sliding mode through the locking block guide pieces (902).

9. A bearing housing for facilitating height adjustment according to claim 8, wherein: the locking driving mechanism further comprises:

the locking mechanism comprises locking connecting rods (801), wherein the two groups of locking connecting rods (801) are arranged, the two groups of locking connecting rods (801) are respectively hinged to the left side and the right side of a locking driving sliding block (8), the other ends of the locking connecting rods (801) are respectively hinged to a group of locking sliding blocks (9), and a double-sliding-block transmission mechanism is formed among the locking driving sliding block (8), the locking connecting rods (801) and the locking sliding blocks (9).

10. A bearing housing for facilitating height adjustment according to claim 1, wherein: the locking sliding block (9) further comprises:

the locking sliding latch (901), the locking sliding latch (901) is uniformly arranged on the outer side of the locking sliding block (9);

the bearing outer mounting seat (1) further comprises:

locking fixed latch (102), locking fixed latch (102) evenly arrange fixed connection bearing outer mounting seat (1) left and right sides inboard, when locking sliding block (9) slide to the outside, locking slip latch (901) and locking fixed latch (102) plug-in connection.

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to a bearing seat convenient for height adjustment.

Background

In the mechanical transmission process, a bearing is often adopted to support shaft parts in order to improve the rotation fluency of transmission precision, and a bearing seat with adjustable height is mostly adopted in order to adjust the installation height of a rotating shaft conveniently in the bearing use process.

For example, application No.: CN201921519015.3 the utility model discloses a bearing seat capable of adjusting height, which comprises a base with mounting holes symmetrically arranged at the center of the outer edge, brackets are vertically welded on the left and right sides of the top of the base symmetrically with respect to the axis, a top plate is horizontally welded between the tops of two groups of brackets, mounting grooves are vertically arranged on the opposite surfaces of the two groups of brackets, a limit rod is vertically welded in any mounting groove, a threaded rod with a fixed turntable at the upper end is welded in the center of the top plate through the rotation of a bearing, a hollow sleeve is screwed at the lower part of the outer wall of the threaded rod, the adjustment of the mounting height of the bearing can be realized through the structures of the arranged threaded rod, the hollow sleeve, the bracket and the like, so that the applicability of the bearing seat is enhanced, the inclination angle of the supporting bearing can be changed at a small angle through the arranged lifting adjusting seat during the actual use, thereby the bearing seat can be used for connecting with a rotating shaft with a certain inclination angle, has practicability.

Based on the above, the height of the existing height-adjustable bearing seat is generally adjusted in a threaded manner, but the bearing seat cannot be well locked in use, so that the bearing seat shakes to influence the transmission precision of the bearing in use, the service life of the bearing is reduced, and meanwhile, the top of a threaded rod is generally operated in use, so that the situation of insufficient top space is easily caused in the installation and use processes, and the operation is difficult and inconvenient; thus, the existing requirements are not met, for which we propose a bearing seat that facilitates height adjustment.

Disclosure of Invention

The invention aims to provide a bearing seat convenient for height adjustment, and aims to solve the problems that the height of the bearing seat is generally adjusted in a threaded mode but cannot be well locked in use, so that the transmission precision of a bearing is affected due to shaking of the bearing seat in use, the service life of the bearing is shortened, and meanwhile, the top of a threaded rod is generally operated in use, so that the situation of insufficient top space is easily caused in the installation and use processes, and the problem of difficulty in operation and inconvenience in use is caused.

In order to achieve the purpose, the invention provides the following technical scheme: a bearing seat convenient for height adjustment comprises an outer bearing mounting seat;

the bearing inner seat is connected to the middle of the bearing outer mounting seat in a sliding manner;

the height adjusting operation parts are arranged in two groups, and the two groups of height adjusting operation parts are respectively and rotatably connected to the front end face and the rear end face of the upper part of the right side of the bearing outer mounting seat;

the height adjusting operating part drives the bearing inner seat to slide up and down through the height adjusting mechanism;

the locking operation parts are arranged in two groups, and the two groups of locking operation parts are respectively connected to the front end face and the rear end face of the lower part of the bearing inner seat in a rotating mode;

the locking sliding blocks are arranged in two groups, and the two groups of locking sliding blocks are respectively connected to the left side and the right side of the bearing inner seat in a sliding manner;

and the locking operating part drives the two groups of locking sliding blocks to synchronously and reversely slide through the locking driving mechanism.

Preferably, the bearing outer mount further comprises:

the height adjusting guide pieces are arranged inside the left side and the right side of the bearing outer mounting seat;

the bearing inner base also comprises:

the inner seat guide groove is arranged on the left side and the right side of the bearing inner seat, and the height adjusting guide piece is connected inside the inner seat guide groove in a sliding mode.

Preferably, the height adjusting mechanism further comprises:

the height adjusting driving bevel gear is coaxially and fixedly connected to the inner side of the height adjusting operation piece;

the height adjusting driving screw is actively connected to the inner side of the top of the bearing outer mounting seat;

the height adjusting drive bevel gears are coaxially and fixedly connected to the right end face of the height adjusting drive screw, and the two groups of height adjusting drive bevel gears are meshed with the height adjusting drive bevel gears to form a bevel gear transmission mechanism.

Preferably, the height adjusting mechanism further comprises:

the height adjusting driving slide block is in threaded transmission connection with the height adjusting driving screw rod, and a screw nut transmission pair is formed between the height adjusting driving slide block and the height adjusting driving screw rod.

Preferably, the height adjusting mechanism further comprises:

the height adjusting connecting rods are arranged in pairs, the height adjusting connecting rods are provided with two pairs, each pair of height adjusting connecting rods are connected through a cross hinge to form a scissor fork mechanism, two sets of scissor fork mechanisms are connected end to form a two-stage scissor fork mechanism, a set of height adjusting connecting rods at the front part of the upper portion are connected with a height adjusting driving slider through hinges, and the lower parts of the two sets of height adjusting connecting rods at the bottom are connected with the bearing inner seat.

Preferably, the locking driving mechanism further comprises:

the locking driving bevel gear is coaxially and fixedly connected to the rear part of the locking operating part;

the locking driving lead screw is in threaded transmission connection with the inside of the bearing inner seat;

and the locking driven bevel gears are coaxially and fixedly connected to the bottom of the locking driving screw rod, and the two groups of locking driving bevel gears are simultaneously meshed with the locking driven bevel gears to jointly form a bevel gear transmission mechanism.

Preferably, the locking driving mechanism further comprises:

and the locking driving slide block is connected below the inner part of the bearing inner seat in a sliding manner, and a locking driving lead screw is meshed with the locking driving slide block to form a lead screw nut transmission pair together.

Preferably, the locking driving mechanism further comprises:

the locking block guide parts are arranged in two groups, the two groups of locking block guide parts are respectively arranged on the upper end surface and the lower end surface of the locking sliding block, and the locking sliding block is connected with the bearing inner seat in a sliding mode through the locking block guide parts.

Preferably, the locking driving mechanism further comprises:

the locking driving slide block, the locking connecting rod and the locking slide block form a double-slide block transmission mechanism together.

Preferably, the locking sliding block further comprises:

the locking sliding latch is uniformly arranged on the outer side of the locking sliding block;

the outer mount pad of bearing still including:

the locking fixing latch is evenly distributed and fixedly connected with the left side and the right side of the bearing outer mounting seat, and when the locking sliding block slides to the outermost side, the locking sliding latch is in plug-in connection with the locking fixing latch.

Compared with the prior art, the invention has the beneficial effects that:

when the mounting height is adjusted, any one height adjusting operation piece is rotated, the height adjusting operation piece drives the height adjusting driving screw to rotate through a bevel gear transmission mechanism which is formed by meshing a height adjusting driving bevel gear and a height adjusting driven bevel gear together, the height adjusting driving screw drives the height adjusting driving slider to slide left and right through a lead screw nut transmission pair which is formed by connecting a height adjusting driving slider and a height adjusting driving screw together, the height adjusting driving slider drives a two-stage type scissor mechanism which is formed by connecting height adjusting connecting rods through crossed hinges to deform, the height of a bearing inner seat is adjusted through the deformation of the two-stage type scissor mechanism, and the mounting requirements of different mounting heights are met.

When the locking mechanism is locked, any one group of locking operation pieces are rotated, the locking operation pieces drive the locking driving screw to rotate through a bevel gear transmission mechanism formed by meshing a locking driving bevel gear and a locking driven bevel gear, the locking driving screw drives the locking driving slide block to slide up and down through a screw nut transmission pair formed by meshing the locking driving screw and the locking driving slide block, the locking driving slide block drives two groups of locking slide blocks to synchronously and reversely slide through a double-slide-block transmission mechanism formed by meshing the locking driving slide block, the locking connecting rod and the locking slide block, and when the locking slide block slides to the outermost side, the locking slide latch is connected with the locking fixing latch in an inserting mode to realize the fastening connection of the bearing inner seat.

The invention realizes the adjustment of the mounting height of the bearing, meets the mounting requirements of different mounting heights, can fasten and connect the bearing inner seat, effectively avoids the shaking of the bearing inner seat, improves the transmission mechanism of the bearing and prolongs the service life of the bearing, realizes the adjustment and the locking of the mounting height of the bearing by adopting two groups of height adjusting operation parts and two groups of locking operation parts, can carry out good operation no matter the mounting direction of the bearing seat, and improves the operation convenience.

Drawings

FIG. 1 is a schematic side view of a bearing shaft of the present invention;

FIG. 2 is a rear isometric view of the present invention;

FIG. 3 is a schematic side view of the transmission shaft of the inner bearing seat of the present invention;

FIG. 4 is a schematic side view of the height adjustment mechanism of the present invention;

FIG. 5 is a schematic side view of the locking drive screw shaft of the present invention;

FIG. 6 is a schematic side view of the height adjustment drive screw drive shaft of the present invention;

FIG. 7 is a schematic side view of the locking actuator mounting shaft of the present invention;

FIG. 8 is a schematic axial side view of the locking actuator of the present invention;

in the figure: 1. a bearing outer mounting seat; 101. a height adjustment guide; 102. locking and fixing the clamping teeth; 2. a height adjustment operator; 201. a height adjustment drive bevel gear; 3. a height adjustment drive screw; 301. a height-adjusting driven bevel gear; 302. a height adjustment drive slide; 4. a height adjustment link; 5. a bearing inner seat; 501. an inner seat guide groove; 6. locking the operating member; 601. locking the driving bevel gear; 7. locking the driving screw rod; 701. locking the driven bevel gear; 8. locking the driving slide block; 801. locking the connecting rod; 9. locking the sliding block; 901. locking the sliding latch; 902. a locking block guide.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 8, an embodiment of the present invention includes: a bearing pedestal convenient for height adjustment comprises an outer bearing mounting seat 1;

the bearing inner seat 5 is connected to the middle part of the bearing outer mounting seat 1 in a sliding manner;

the height adjusting operation parts 2 are arranged in two groups, and the two groups of height adjusting operation parts 2 are respectively and rotatably connected to the front end face and the rear end face of the upper part of the right side of the bearing outer mounting seat 1;

the height adjusting operating part 2 drives the bearing inner seat 5 to slide up and down through the height adjusting mechanism; as shown in fig. 3 and fig. 4, the height adjusting mechanism further includes: the height adjusting driving bevel gear 201 is coaxially and fixedly connected to the inner side of the height adjusting operation part 2; the height adjusting driving screw 3 is actively connected to the inner side of the top of the bearing outer mounting seat 1; the height adjusting driven bevel gears 301 are coaxially and fixedly connected to the right end face of the height adjusting driving screw 3, the two groups of height adjusting driving bevel gears 201 are meshed with the height adjusting driven bevel gears 301 to form a bevel gear transmission mechanism, and when any one height adjusting operation part 2 is rotated in use, the height adjusting operation part 2 drives the height adjusting driving screw 3 to rotate through the bevel gear transmission mechanism formed by the height adjusting driving bevel gears 201 and the height adjusting driven bevel gears 301 in a meshed mode; the height adjusting driving slide block 302 is in threaded transmission connection with the height adjusting driving screw rod 3, a screw nut transmission pair is formed between the height adjusting driving slide block 302 and the height adjusting driving screw rod 3, and when the height adjusting driving screw rod 3 rotates in use, the height adjusting driving screw rod 3 drives the height adjusting driving slide block 302 to slide left and right through the screw nut transmission pair formed between the height adjusting driving slide block 302 and the height adjusting driving screw rod 3; the height adjusting mechanism comprises height adjusting connecting rods 4, the height adjusting connecting rods 4 are arranged in pairs, two pairs of height adjusting connecting rods 4 are arranged, each pair of height adjusting connecting rods 4 are connected through a cross hinge to form a scissor mechanism, two sets of scissor mechanisms are connected end to form a two-stage scissor mechanism, the height adjusting connecting rods 4 at the front of the upper portion are connected with a height adjusting driving slider 302 through hinges, the lower portions of the two sets of height adjusting connecting rods 4 at the bottom are connected with a bearing inner seat 5, when the height adjusting driving slider 302 slides left and right in use, the height adjusting driving slider 302 drives the two-stage scissor mechanism formed by the cross hinge connection of the height adjusting connecting rods 4 to deform, the height of the bearing inner seat 5 is adjusted through the deformation of the two-stage scissor mechanism, and the installation requirements of different installation heights are met; the locking driving bevel gear 601 is coaxially and fixedly connected to the rear part of the locking operation piece 6; the locking driving screw 7 is in threaded transmission connection with the inside of the bearing inner seat 5; the locking driving bevel gears 701 are coaxially and fixedly connected to the bottom of the locking driving screw 7, the two groups of locking driving bevel gears 601 are meshed with the locking driving bevel gears 701 to form a bevel gear transmission mechanism, and when any one group of locking operation pieces 6 is rotated in use, the locking operation pieces 6 drive the locking driving screw 7 to rotate through the bevel gear transmission mechanism formed by the locking driving bevel gears 601 and the locking driving bevel gears 701 in a meshed mode.

The locking operation parts 6 are arranged in two groups, and the two groups of locking operation parts 6 are respectively connected to the front end face and the rear end face of the lower part of the bearing inner seat 5 in a rotating manner; two groups of locking sliding blocks 9 are arranged, and the two groups of locking sliding blocks 9 are respectively connected to the left side and the right side of the bearing inner seat 5 in a sliding manner;

the locking driving mechanism is arranged in the bottom of the bearing inner seat 5, and the locking operating part 6 drives the two groups of locking sliding blocks 9 to synchronously and reversely slide through the locking driving mechanism; as shown in fig. 7 and 8, the locking driving mechanism further includes: the locking driving sliding block 8 is connected to the lower portion inside the bearing inner seat 5 in a sliding mode, the locking driving lead screw 7 and the locking driving sliding block 8 are meshed to form a lead screw nut transmission pair together, and when the locking driving lead screw 7 rotates in use, the locking driving lead screw 7 drives the locking driving sliding block 8 to slide up and down through the lead screw nut transmission pair formed by the locking driving lead screw 7 and the locking driving sliding block 8 in a meshed mode; the locking driving mechanism further comprises: the locking block guide parts 902 are arranged in two groups, the two groups of locking block guide parts 902 are respectively arranged on the upper end surface and the lower end surface of the locking sliding block 9, the locking sliding block 9 is connected with the bearing inner seat 5 in a sliding way through the locking block guide parts 902, and in use, the locking sliding block 9 is guided through the locking block guide parts 902; the locking connecting rods 801 are provided with two groups, the two groups of locking connecting rods 801 are respectively hinged to the left side and the right side of the locking driving slide block 8, the other end of the locking connecting rod 801 is respectively hinged to one group of locking slide blocks 9, the locking driving slide block 8, the locking connecting rods 801 and the locking slide blocks 9 jointly form a double-slide-block transmission mechanism, and in use, when the locking driving slide block 8 slides up and down, the locking driving slide block 8 drives the two groups of locking slide blocks 9 to synchronously and reversely slide through the double-slide-block transmission mechanism jointly formed among the locking driving slide block 8, the locking connecting rods 801 and the locking slide blocks 9.

As shown in fig. 1, the bearing outer mount 1 further includes:

the height adjusting guide 101, the height adjusting guide 101 is arranged inside the left and right sides of the bearing outer mounting seat 1;

the bearing inner seat 5 further comprises:

inner race guide way 501, inner race guide way 501 set up in the left and right sides of bearing inner race 5, and altitude mixture control guide 101 sliding connection is inside inner race guide way 501, and the effect is, has realized the direction to bearing inner race 5 through altitude mixture control guide 101.

As shown in fig. 8, the locking slider 9 further includes:

the locking sliding latch 901, the locking sliding latch 901 is uniformly arranged outside the locking sliding block 9;

the bearing outer mounting seat 1 further comprises:

the locking fixing latch 102 is evenly distributed and fixedly connected with the inner sides of the left side and the right side of the bearing outer mounting seat 1, when the locking sliding block 9 slides to the outermost side, the locking sliding latch 901 is in plug-in connection with the locking fixing latch 102, and when the locking sliding block 9 slides to the outermost side in use, the locking sliding latch 901 is in plug-in connection with the locking fixing latch 102 to achieve the fastening connection of the bearing inner seat 5.

The working principle is as follows: when the installation height is adjusted, when any one height adjusting operation piece 2 is rotated, the height adjusting operation piece 2 drives the height adjusting driving screw rod 3 to rotate through a bevel gear transmission mechanism formed by meshing the height adjusting driving bevel gear 201 and the height adjusting driven bevel gear 301 together, the height adjusting driving screw rod 3 drives the height adjusting driving slide block 302 to slide left and right through a screw nut transmission pair formed by meshing the height adjusting driving slide block 302 and the height adjusting driving screw rod 3 together, the height adjusting driving slide block 302 drives a two-stage type scissor mechanism formed by connecting the height adjusting connecting rods 4 through a cross hinge to deform, the height of the bearing inner seat 5 is adjusted through the deformation of the two-stage type scissor mechanism, and the installation requirements of different installation heights are met; when locking is performed, when any one group of locking operation pieces 6 is rotated, the locking operation pieces 6 drive the locking driving screw 7 to rotate through a bevel gear transmission mechanism formed by meshing the locking driving bevel gear 601 and the locking driven bevel gear 701 together, the locking driving screw 7 drives the locking driving slider 8 to slide up and down through a screw nut transmission pair formed by meshing the locking driving screw 7 and the locking driving slider 8 together, the locking driving slider 8 drives two groups of locking sliding blocks 9 to synchronously and reversely slide through a double-slider transmission mechanism formed by meshing the locking driving slider 8, the locking connecting rod 801 and the locking sliding blocks 9 together, and when the locking sliding blocks 9 slide to the outermost side, the locking sliding latch 901 is connected with the locking fixing latch 102 in an inserting mode to achieve fastening connection of the bearing inner seat 5.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.