Shaft bushing with self-centering function

Abstract

The utility model provides a shaft bushing with a self-centering function, which comprises an inner bushing, an outer bushing movably sleeved outside the inner bushing, a movable gap arranged between the inner bushing and the outer bushing, a positioning ring fixedly connected to the inner wall of the bottom end of the outer bushing, and an abutting piece arranged inside the outer bushing, according to the shaft bushing with the self-centering function, through the movable gap formed between the inner bushing and the outer bushing, when the outer bushing is controlled to be pressed into the mounting base after the inner bushing is fixed through a bench clamp or a clamp of stamping equipment, the outer bushing is pressed into the mounting base, and the outer bushing is pressed into the mounting base. Even if the mounting seat is not precise enough in mounting, the outer bushing can slightly move relative to the inner bushing in the assembling process, so that the outer bushing is stably assembled on the mounting seat in a self-centering manner, and the damage of mounting equipment or a bearing sleeve due to the stability of the placement precision of the mounting seat in the mounting process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaft bush, specifically, relate to a kind of shaft bush with self-centering function. BACKGROUND

[0002] The accurate positioning of machine components plays an important role, and bearings are included in the components. Bearing bush is used in conjunction with bearing during use. Bearing bush is a ring that acts as a gasket, providing sealing and wear protection. By replacing the worn bearing, bearing bush effectively extends the service life of the bearing. Before the shaft bush and shaft cooperate, the bearing needs to be installed in the bearing seat to make it fit with the bearing seat.

[0003] During the installation of the shaft bush, a bench vice or a stamping device is usually used to slowly press the shaft bush into the fixed mounting seat. However, in actual use, the fixed position of the mounting seat may not be precise enough, resulting in centering errors during installation. The coaxiality of the mounting seat assembly hole and the shaft bush cannot be guaranteed, which may cause the bush assembly to fail, damage the bench vice or stamping device parts, and deform the bearing bush body. SUMMARY

[0004] The utility model aims to provide a kind of shaft bush with self-centering function to solve the above problems.

[0005] To achieve the above purpose, the utility model embodiment provides a kind of shaft bush with self-centering function, which includes: an inner bush, an outer bush movably sleeved outside the inner bush, an active gap between the inner bush and the outer bush, a positioning ring fixedly connected to the inner wall of the bottom end of the outer bush, an abutting piece arranged inside the outer bush, a buffer piece arranged in the active gap, and a locking piece installed on the top of the outer bush.

[0006] The abutting piece is adapted to contact and limit the displacement of the upper and lower ends of the inner bush.

[0007] The locking piece is adapted to control the abutting piece to approach the inner bush.

[0008] The buffer piece is adapted to support the outer wall of the inner bush.

[0009] Further, the abutting piece includes two wedge-shaped abutting rings symmetrically arranged inside the outer bush.

[0010] The upper and lower ends of the outer wall of the inner bush are rounded.

[0011] The wedge surfaces of the two wedge-shaped abutting rings respectively abut against the upper and lower ends of the inner bush.

[0012] Further, the locking member comprises an assembly groove formed on the top of the outer sleeve, a locking ring fitted and inserted in the assembly groove, a plurality of assembly holes formed in an annular array on the locking ring, a plurality of locking bolts respectively arranged in the assembly holes, and a plurality of threaded holes formed in an annular array on the upper end of the outer sleeve and corresponding to the locking bolts;

[0013] The locking bolts are threadedly connected with the outer sleeve through the threaded holes;

[0014] The head end top of the locking bolts is flush with the upper surface of the locking ring.

[0015] Further, the buffer member comprises a rubber sleeve arranged in the movable gap and sleeved on the outer portion of the inner sleeve, and a plurality of inner deformation grooves and outer deformation grooves formed at equal intervals on the outer wall and the inner wall of the rubber sleeve.

[0016] Further, the two wedge-shaped abutting rings respectively abut against the upper surface of the positioning ring and the lower surface of the locking ring.

[0017] Further, the inner diameter of the locking ring is consistent with the inner diameter of the positioning ring and is greater than the inner diameter of the inner sleeve.

[0018] Further, the bottom end outer wall of the outer sleeve is chamfered.

[0019] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0020] The shaft sleeve with the self-centering function is composed of the outer sleeve and the inner sleeve in a split type, a movable gap is formed between the outer sleeve and the inner sleeve for the movement of the inner sleeve, the locking member is adjusted and arranged, and the abutting member is matched to limit the movement space of the inner sleeve, so that the inner sleeve is prevented from being separated from the outer sleeve during the process that the inner sleeve is clamped by the clamp and drives the outer sleeve to be assembled into the mounting seat, the outer sleeve or the relative inner sleeve moves when the chamfer at the bottom of the outer sleeve contacts the chamfer at the mounting portion of the mounting seat, the center end of the outer sleeve after movement can be on the same axis as the center end of the mounting seat, the outer sleeve can be smoothly assembled into the mounting seat, the installation failure of the shaft sleeve is avoided due to the inaccuracy of the fixed position of the mounting seat, the damage of the bench vice or the stamping equipment part is avoided, and the deformation and damage of the shaft sleeve as a whole are avoided;

[0021] The shaft bushing with the self-centering function can limit and buffer the contact between the outer bushing and the inner bushing 1, avoids the damage caused by the collision between the outer bushing and the inner bushing, and can absorb certain vibration and impact when the shaft bushing is used, thereby reducing the shaking and instability of the bearing connecting mechanical parts in the running process. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further explained in connection with the drawings and embodiments.

[0023] Figure 1 A perspective view of the utility model is shown;

[0024] Figure 2 A partially exploded perspective view of the utility model is shown;

[0025] Figure 3 An exploded perspective view of the utility model is shown;

[0026] Figure 4 A sectional view of the utility model is shown;

[0027] Figure 5 A partially cutaway perspective view of the utility model is shown.

[0028] In the drawings

[0029] 1, inner bushing; 2, outer bushing; 3, movable gap; 4, positioning ring; 5, abutting member; 6, buffer; 7, locking member; 8, wedge-shaped abutting ring; 9, assembly groove; 10, locking ring; 11, assembly hole; 12, locking bolt; 13, threaded hole; 14, rubber sleeve; 15, inner deformation groove; 16, outer deformation groove. DETAILED DESCRIPTION

[0030] The utility model will be further explained in connection with the drawings and embodiments.

[0031] As Figures 1-5 shown, a shaft bushing with a self-centering function, comprising: an inner bushing 1, an outer bushing 2 movably sleeved outside the inner bushing 1, a movable gap 3 arranged between the inner bushing 1 and the outer bushing 2, a positioning ring 4 fixedly connected to the inner wall of the bottom end of the outer bushing 2, an abutting member 5 arranged inside the outer bushing 2, a buffer 6 arranged in the movable gap 3, and a locking member 7 mounted on the top of the outer bushing 2, wherein

[0032] The abutting member 5 is adapted to contact and limit the displacement of the upper and lower ends of the inner bushing 1;

[0033] The locking member 7 is adapted to control the abutting member 5 to approach the inner sleeve 1;

[0034] The buffer member 6 is adapted to support the outer wall of the inner sleeve 1. In use, the buffer member 6 is sleeved on the outer wall of the inner sleeve 1, and then the abutting member 5 and the inner sleeve 1 are placed in the outer sleeve 2, and the abutting member 5 is preliminarily positioned by the locking member 7. In this way, the inner sleeve 1 can move in the outer sleeve 2, and the inner sleeve 1 is prevented from being separated from the outer sleeve 2. Then, the inner sleeve 1 is clamped by a clamp on the stamping equipment and moved to the top of the mounting seat. Lubricating oil or grease is applied to the lower end of the outer sleeve 2, and then the inner sleeve 1 and the outer sleeve 2 are slowly moved to approach the mounting seat. When the fixed position of the mounting seat is not precise, and the center of the mounting seat is not on the same axis as the center of the outer sleeve 2, the outer sleeve 2 can move relative to the inner sleeve 1 through the gap 3 between the outer sleeve 2 and the inner sleeve 1 after the chamfer at the lower end of the outer sleeve 2 abuts against the chamfer at the mounting hole of the mounting seat. Then, the outer sleeve 2 is automatically positioned and centered after the chamfer at the lower end of the outer sleeve 2 abuts against the chamfer at the mounting hole of the mounting seat, so that the center of the outer sleeve 2 is on the same axis as the center of the mounting seat, and the outer sleeve 2 can be smoothly assembled into the mounting seat. In this way, the assembly failure is avoided, and the damage of the bench clamp or the stamping equipment parts and the deformation of the bearing sleeve body are avoided. After the outer sleeve 2 is assembled into the mounting seat, the abutting member 5 is moved in the outer sleeve 2 by the locking member 7, so that the movement of the inner sleeve 1 in the outer sleeve 2 is limited, and the inner sleeve 1 is stably assembled in the outer sleeve 2, so that the shaft sleeve can be normally used. During the movement of the outer sleeve 2, the contact between the outer sleeve 2 and the inner sleeve 1 is limited and buffered by the buffer member 6, so that the damage of the outer sleeve 2 and the inner sleeve 1 due to collision is avoided. In addition, the buffer member 6 can absorb vibration and impact during use of the shaft sleeve, so that the shaking and instability of the mechanical parts connected with the bearing during operation are reduced.

[0035] Optionally, the abutting member 5 includes two wedge-shaped abutting rings 8 symmetrically arranged in the outer sleeve 2.

[0036] The upper and lower ends of the outer wall of the inner sleeve 1 are chamfered.

[0037] The wedge surfaces of the two wedge-shaped abutting rings 8 respectively abut the upper and lower ends of the inner sleeve 1. Before the outer sleeve 2 is assembled to the mounting seat, the locking member 7 does not extrude the wedge-shaped abutting ring 8 above the inner sleeve 1, and does not limit the movement of the inner sleeve 1. Therefore, when the clamp clamps the inner sleeve 1 and drives the outer sleeve 2 to be assembled on the mounting seat, the outer sleeve 2 can move relative to the inner sleeve 1. After the outer sleeve 2 is assembled on the mounting seat, the wedge-shaped abutting ring 8 above the inner sleeve 1 can be extruded by the locking assembly, and the inner sleeve 1 is extruded to extrude the wedge-shaped abutting ring 8 below the inner sleeve 1, so that the rounded corners at the upper and lower ends of the inner sleeve 1 respectively contact the two wedge-shaped abutting rings 8, so that the inner sleeve 1 is extruded and abuts, and the stable assembly in the outer sleeve 2 is completed, and the center end of the inner sleeve 1 is on the same axis as the center end of the outer sleeve 2, thereby ensuring the stability of the shaft sleeve during work.

[0038] Optionally, the locking member 7 comprises an assembly groove 9 opened at the top of the outer sleeve 2, a locking ring 10 fitted and inserted into the assembly groove 9, a plurality of assembly holes 11 annularly arranged on the locking ring 10, a plurality of locking bolts 12 respectively arranged in the plurality of assembly holes 11, and a plurality of threaded holes 13 annularly arranged on the upper end of the outer sleeve 2 and corresponding to the plurality of locking bolts 12.

[0039] The plurality of locking bolts 12 are threadedly connected with the outer sleeve 2 through the plurality of threaded holes 13.

[0040] The head end top of the plurality of locking bolts 12 is flush with the upper surface of the locking ring 10. After the outer sleeve 2 is assembled into the mounting seat, the locking ring 10 is previously placed into the assembly groove 9, then the plurality of locking bolts are sequentially inserted into the plurality of assembly holes 11, the plurality of locking bolts are controlled to rotate and are inserted into the plurality of threaded holes 13, thereby completing the fixation of the locking ring 10, so that the wedge-shaped abutting ring 8 above the inner sleeve 1 is extruded and moves downward, the movement of the upper end of the inner sleeve 1 is limited, the inner sleeve 1 moves downward and extrudes the wedge-shaped abutting ring 8 below the inner sleeve 1, the movement of the lower end of the inner sleeve 1 is limited, and the assembly of the inner sleeve 1 in the outer sleeve 2 is completed. At the same time, before the outer sleeve 2 is installed on the mounting seat, the locking ring 10 can be partially fixed in the assembly groove 9 by the plurality of locking bolts, thereby avoiding the situation that the inner sleeve 1 is separated from the outer sleeve 2 when the inner sleeve 1 and the outer sleeve 2 are lifted by the clamp.

[0041] Optionally, the buffer 6 comprises a rubber sleeve 14 arranged in the movable gap 3 and sleeved on the outer part of the inner sleeve 1, a plurality of inner deformation grooves 15 and outer deformation grooves 16 are equidistantly arranged on the outer wall and inner wall of the rubber sleeve 14, when the inner sleeve 1 moves in the outer sleeve 2 through the movable gap 3, the arranged rubber sleeve 14 can limit and buffer the movement of the inner sleeve 1 and the outer sleeve 2, thereby avoiding the damage caused by the direct collision between the outer wall of the inner sleeve 1 and the inner wall of the outer sleeve 2, and since the rubber sleeve 14 is provided with a plurality of inner deformation grooves 15 and outer deformation grooves 16, the compressible range of the rubber sleeve 14 can be effectively improved, thereby ensuring the movement space of the outer sleeve 2 relative to the inner sleeve 1 when the inner sleeve 1 is stationary, and the arranged rubber sleeve 14 can absorb certain vibration and impact when the shaft sleeve is used, thereby reducing the shaking and instability of the mechanical parts during operation.

[0042] Optionally, the two wedge-shaped abutting rings 8 are respectively abutted against the upper surface of the positioning ring 4 and the lower surface of the locking ring 10, when the locking member 7 works, the wedge-shaped abutting ring 8 located above the inner sleeve 1 is facilitated to move downward and abut against the upper end of the inner sleeve 1, and at the same time, the wedge-shaped abutting ring 8 below the inner sleeve 1 is stably abutted against the lower end of the inner sleeve 1 under the support of the positioning ring 4.

[0043] Optionally, the inner diameter of the locking ring 10 is consistent with the inner diameter of the positioning ring 4 and is greater than the inner diameter of the inner sleeve 1, thereby avoiding the contact between the shaft and the locking ring 10 and the positioning ring 4 during use, and affecting the smoothness of movement.

[0044] Optionally, the bottom end outer wall of the outer sleeve 2 is chamfered, and when the bearing sleeve is installed, the chamfered part of the bottom of the outer sleeve 2 can be matched with the chamfered part of the assembly seat, thereby making the process of inserting the outer sleeve 2 into the assembly seat more smooth.

[0045] The above only describes preferred embodiments of the present application and is not used to limit the present application, and for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shaft bushing having a self-centering function, characterized by, The application relates to a shaft bushing with a self-centering function, which comprises an inner bushing (1), an outer bushing (2) movably sleeved outside the inner bushing (1), a movable gap (3) arranged between the inner bushing (1) and the outer bushing (2), a positioning ring (4) fixedly connected to the inner wall of the bottom end of the outer bushing (2), an abutting piece (5) arranged inside the outer bushing (2), a buffer piece (6) arranged in the movable gap (3), and a locking piece (7) mounted on the top of the outer bushing (2), wherein the abutting piece (5) is adapted to contact and limit the displacement of the upper and lower ends of the inner bushing (1); the locking piece (7) is adapted to control the abutting piece (5) to approach the inner bushing (1); and the buffer piece (6) is adapted to support the outer wall of the inner bushing (1).

2. The shaft bushing with the self-centering function as claimed in claim 1, wherein the abutting piece (5) comprises two wedge-shaped abutting rings (8) symmetrically arranged inside the outer bushing (2); the upper and lower ends of the outer wall of the inner bushing (1) are both rounded; and the wedge faces of the two wedge-shaped abutting rings (8) respectively abut against the upper and lower ends of the inner bushing (1).

3. The shaft bushing with the self-centering function as claimed in claim 2, wherein the locking piece (7) comprises an assembly groove (9) formed in the top of the outer bushing (2), a locking ring (10) slidably inserted into the assembly groove (9), a plurality of assembly holes (11) annularly arranged on the locking ring (10), a plurality of locking bolts (12) respectively arranged in the plurality of assembly holes (11), and a plurality of threaded holes (13) annularly arranged on the upper end of the outer bushing (2) and corresponding to the plurality of locking bolts (12); the plurality of locking bolts (12) are threadedly connected to the outer bushing (2) through the plurality of threaded holes (13); and the head top of the plurality of locking bolts (12) is flush with the upper surface of the locking ring (10).

4. The shaft bushing with the self-centering function as claimed in claim 3, wherein the buffer piece (6) comprises a rubber sleeve (14) arranged in the movable gap (3) and sleeved outside the inner bushing (1), and a plurality of inner deformation grooves (15) and outer deformation grooves (16) equidistantly formed on the outer wall and the inner wall of the rubber sleeve (14).

5. The shaft bushing with the self-centering function as claimed in claim 4, wherein the two wedge-shaped abutting rings (8) respectively abut against the upper surface of the positioning ring (4) and the lower surface of the locking ring (10).

6. The shaft bushing with the self-centering function as claimed in claim 5, wherein the inner diameter of the locking ring (10) is consistent with the inner diameter of the positioning ring (4) and is larger than the inner diameter of the inner bushing (1).

7. The shaft bushing with the self-centering function as claimed in claim 5, wherein the bottom end of the outer bushing (2) is chamfered. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Images