CN114876941A

CN114876941A - Driving assembly

Info

Publication number: CN114876941A
Application number: CN202210467719.0A
Authority: CN
Inventors: 王德波; 应烁钰; 吴中林; 王冬阳; 韩海丰; 朱彦军
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shanghai United Imaging Healthcare Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-09

Abstract

The invention relates to a driving assembly, which comprises a rack, at least three limiting bearings and a driving shaft, wherein the rack comprises a supporting seat and a cover plate, the cover plate is connected with the supporting seat and has a first state that a limiting hole is formed by surrounding the cover plate with the supporting seat and a second state that the limiting hole is opened to form an opening, the cover plate is connected with at least one limiting bearing, and the driving shaft is arranged in the limiting hole; when the cover plate is in the first state, the outer ring of the limiting bearing is abutted against the outer peripheral surface of the driving shaft, and the included angle of the connecting line of the rotating shaft point of any two adjacent limiting bearings and the rotating shaft point of the driving shaft is less than 180 degrees, so that the driving shaft is fixed. The embodiment of the invention has the following beneficial effects: this drive assembly comes the fixed drive shaft of centre gripping through replacing current single bearing with at least three spacing bearing, when reducing the vibration phenomenon of circling round of drive shaft, thereby only need remove the apron and just can open the convenient drive shaft of taking out in spacing hole.

Description

Driving assembly

Technical Field

The invention relates to the technical field of driving shafts, in particular to a driving assembly.

Background

When the driving shaft is used as a power source, the rotary vibration phenomenon is easy to occur when the driving shaft rotates at high speed. The convolution vibration phenomenon is the resultant motion of a shaft system generated under the action of external force, wherein the shaft rotates around the center line of the shaft system on one hand, and simultaneously, the shaft line is in a bending state and revolves around the center line of an original balance shaft at another angular speed.

In order to reduce the rotary vibration of the driving shaft, a bearing is generally sleeved on the rotating shaft, and then the bearing is fixed on the frame, so that the bearing is utilized to limit the jump of the driving shaft under the condition of not blocking the rotation of the driving shaft.

The mode of utilizing single bearing housing to establish fixed drive shaft has the comparatively loaded down with trivial details problem of dismouting drive shaft, especially when installing epaxial part on the drive shaft, is not convenient for more take off the drive shaft.

Disclosure of Invention

In view of the above, it is desirable to provide a driving assembly for solving the technical problem in the prior art that the driving shaft installed in the bearing is difficult to be taken out in order to reduce the rotational vibration.

The present invention provides a drive assembly, comprising: the device comprises a rack, at least three limiting bearings and a driving shaft, wherein the rack comprises a supporting seat and a cover plate, the cover plate is connected with the supporting seat, the cover plate has a first state that a limiting hole is formed by surrounding the cover plate with the supporting seat, the cover plate also has a second state that the limiting hole is opened to form an opening, the cover plate is connected with at least one limiting bearing, and the driving shaft is arranged in the limiting hole; when the cover plate is in a first state, the outer ring of the limiting bearing is abutted against the outer peripheral surface of the driving shaft, and the included angle of the connecting line of the rotating shaft point of any two adjacent limiting bearings and the rotating shaft point of the driving shaft is less than 180 degrees; when the cover plate is in the second state, the driving shaft can move out of/into the limiting hole through the opening.

Further, the supporting seat and the cover plate are both connected with limiting bearings, and the limiting bearing part extends to protrude out of the inner wall of the limiting hole.

Further, spacing bearing includes the spacing bearing of lower limit that is connected with the supporting seat, and two at least interval arrangements's of supporting seat connection spacing bearing down, spacing bearing arrange in the drive shaft below and can with the drive shaft butt down.

Furthermore, at least one part of the cover plate is detachably connected with the supporting seat.

Furthermore, apron one end is rotated with the supporting seat and is connected, and the other end and the supporting seat of apron can be dismantled and be connected.

Further, the frame still includes the locking piece, and the supporting seat can be dismantled with the apron via the locking piece and be connected, and the locking piece is used for apron and supporting seat locking in first state.

Furthermore, the axis of any one limit bearing is parallel to the axis of the driving shaft.

Furthermore, the supporting seat is formed with a limiting groove, and the cover plate can surround the opening of the limiting groove to form a limiting hole.

Furthermore, the cover plate comprises two cover plate sub-plates arranged in parallel at intervals and a cover plate middle shaft connected with the two cover plate sub-plates, the limiting bearing is positioned between the two cover plate sub-plates, and the inner ring of the limiting bearing is fixedly sleeved on the cover plate middle shaft.

Further, the supporting seat comprises two supporting seat branch plates arranged in parallel at intervals and a supporting seat middle shaft connected with the two supporting seat branch plates, the limiting bearing is located between the two supporting seat branch plates, and the inner ring of the limiting bearing is fixedly sleeved on the supporting seat middle shaft.

Compared with the prior art, this drive assembly is through replacing current single bearing with at least three spacing bearing and come the fixed drive shaft of centre gripping, when reducing the vibration phenomenon of circling round of drive shaft, thereby only need remove the apron and just can open spacing hole and conveniently take out the drive shaft from the opening part in spacing hole.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given with reference to the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a first embodiment of a driving assembly according to the present invention;

FIG. 2 is a side view of a first embodiment of a drive assembly provided by the present invention;

FIG. 3 is a cross-sectional view of section A-A of FIG. 2;

fig. 4 is a schematic view of a bearing arrangement of another embodiment of the driving assembly provided by the present invention.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

Referring to fig. 1 to 3, the driving assembly includes a frame 1, at least three limit bearings 2, and a driving shaft 3. The frame 1 includes a support base 11 and a cover plate 12, the cover plate 12 is connected to the support base 11 and has a first state surrounding the support base 11 to form a limit hole 15 and a second state opening the limit hole 15 to form an opening. The cover plate 12 is connected with at least one limit bearing 2, and the driving shaft 3 is arranged in the limit hole 15. When the cover plate 12 is in the first state, the outer ring of the limit bearing 2 abuts against the outer peripheral surface of the drive shaft 3 and the connecting line included angle between the rotating shaft point of any two adjacent limit bearings 2 and the rotating shaft point of the drive shaft 3 is less than 180 degrees, so as to fix the drive shaft 3. When the cover plate 12 is in said second state, the drive shaft 3 can be translated in its radial direction out of the limit hole 15 through the opening.

In some embodiments of the present application, the cover plate 12 may be detachably connected to the support base 11. The limit hole 15 is surrounded by the mounting cover plate 12 and the limit hole 15 is opened by detaching the cover plate 12, so that the support seat 11 is switched between the first state and the second state.

In other embodiments of the present application, the cover plate 12 may be partially detachably connected to the supporting base 11, as long as the part of the structure on the cover plate 12 is connected to the supporting base 11, and the limiting hole 15 can be formed by surrounding; after the support base 11 is detached, the limiting hole 15 can be opened. So that the functions of the first state and the second state are realized by the detachable connection of the partial structure of the cover plate 12 and the support seat 11.

Preferably, one end of the cover plate 12 is rotatably connected to the supporting base 11, and the other end thereof is detachably connected to the supporting base 11. And the one end of rotating the connection and the one end of can dismantling the connection are located the both sides of spacing hole 15 respectively, can dismantle the link like this and dismantle the back, only need flip apron 12 can change apron 12 from the first state into the second state, open spacing hole 15 and get and put drive shaft 3.

In this embodiment, the supporting seat 11 plays a bearing role in the driving assembly, so that the supporting seat 11 is formed with a limiting groove 114 for accommodating the driving shaft 3. In other embodiments, the supporting seat 11 and the cover plate 12 may have groove structures, and the two groove structures have openings that surround each other to form a limiting groove 114 for accommodating the driving shaft 3.

In this embodiment, the supporting seat 11 includes two supporting seat sub-plates 111 arranged in parallel and spaced apart, a supporting seat central axis 112 connecting the two supporting seat sub-plates 111, and a bottom plate 113 fixedly connecting the two supporting seat sub-plates 111. The two supporting seat sub-plates 111 are all formed with grooves at the same positions, and the two grooves can be U-shaped and jointly form a limiting groove 114 of the supporting seat 11. The support base central axis 112 is disposed around a retaining groove 114. The base plate 113 is used to attach the present drive assembly to another device and is therefore suitably formed with threaded holes, attachment holes or other structures.

The cover plate 12 is movably connected to the supporting base 11 for opening or closing the opening of the limiting groove 114 to realize the switching between the first state and the second state, thereby facilitating the assembly and disassembly of the driving shaft 3. In the present embodiment, the cover plate 12 includes two cover plate sub-plates 121 arranged in parallel and spaced apart, and a cover plate central axis 122 connecting the two cover plate sub-plates 121. In this embodiment, a part of the two cover plates 121 is inserted between the two support seat plates 111. In other embodiments of the present application, a portion of the two support seat sub-plates 111 may be inserted between the two cover plate sub-plates 121.

The frame 1 further comprises a locking piece 13, and the locking piece 13 is detachably connected with the supporting seat 11 and the cover plate 12 and used for locking the cover plate 12 in a first state.

In this embodiment, the locking member 13 is a bolt. And the overlapping position of the supporting seat sub-plate 111 and the cover sub-plate 121 is provided with a connecting jack, that is, a first connecting hole 1111 is formed on the supporting seat sub-plate 111, and a second connecting hole 1211 is formed on the cover sub-plate 121. When the cover 12 and the supporting base 11 are in the locked position, the first connecting hole 1111 faces the second connecting hole 1211, and the locking member 13 can be inserted into the first connecting hole 1111 and the second connecting hole 1211 at the same time to achieve the locking function.

In other embodiments of the present application, the supporting seat central axis 112 and the cover plate central axis 122 may also adopt a circular plug, that is, the circular plug is inserted into the two supporting seat sub-plates 111 or the two cover plate sub-plates 121, and the inner ring of the limit bearing 2 is sleeved on the circular plug, so that the limit bearing 2 can be conveniently mounted and dismounted.

In this embodiment, the frame 1 further includes a rotating shaft 14, and the cover plate 12 is rotatably connected to the supporting base 11 through the rotating shaft 14. Preferably, the rotating shaft 14 and the locking member 13 are respectively disposed at two sides of the limiting hole 15, and an axis of the rotating shaft 14 is parallel to a central axis of the limiting hole 15. After the locking piece 13 is pulled out, the cover plate 12 can be turned upwards to the second state around the rotating shaft 14, so that the limiting hole 15 is opened, and the driving shaft 3 can be conveniently taken and placed. When the drive shaft 3 is mounted and the cover plate 12 is then rotated back to the first position, the locking element 13 is inserted and locked.

In other embodiments of the present application, the rotating shaft 14 may also be a circular pin, the rotating shaft 14 is inserted into the supporting seat sub-plate 111 and the cover sub-plate 121, and at least one of the supporting seat sub-plate 111 and the cover sub-plate 121 can rotate around the rotating shaft 14, so as to surround or open the limiting hole 15.

Spacing bearing 2 encircles spacing hole 15 and arranges and be connected with frame 1, and drive shaft 3 arranges in spacing hole 15, and the outer lane of spacing bearing 2 and the outer peripheral face butt of drive shaft 3 and the line contained angle of the pivot point of arbitrary two adjacent spacing bearings 2 and the pivot point of drive shaft 3 are less than 180 degrees for fixed drive shaft 3. The apron 12 is connected with at least one spacing bearing 2, when removing apron 12 and making it change into the second state from the first state like this, can drive at least one spacing bearing 2 and remove in step to destroy the fixed effect of the common formation of spacing bearing 2 (or spacing bearing 2 and the common formation of spacing hole 15 inner wall) to drive shaft 3, make drive shaft 3 take out from spacing hole 15.

Preferably, part of the limit bearing 2 is disposed on the supporting seat 11, and part of the limit bearing 2 is disposed on the cover plate 12, that is, the limit bearing 2 is disposed on both the supporting seat 11 and the cover plate 12. The limiting bearing 2 extends to protrude out of the inner wall of the limiting hole 15 partially so that a gap is formed between the driving shaft 3 and the inner wall of the limiting hole 15, and the driving shaft 3 does not generate friction with the inner wall of the limiting hole 15 when rotating.

Preferably the axis of any one of the limit bearings 2 is parallel to the axis of the drive shaft 3. Thus, the driving shaft 3 and the outer peripheral surface of the limit bearing 2 are in line contact instead of point contact, and the contact is more stable and reliable. Meanwhile, the pressure and the load on the contact surface between the driving shaft 3 and the limiting bearing 2 can be reduced, and the abrasion between the driving shaft 3 and the limiting bearing 2 is reduced so as to prolong the service life of the driving shaft and the limiting bearing.

Obviously, when one limit bearing 2 is provided on the support base 11 and two or more limit bearings 2 are provided on the cover plate 12. If the movable cover 12 is in the second state, the driving shaft 3 in the limiting hole 15 is in an unstable balanced state and is liable to slide off the limiting bearing 2 on the supporting seat 11.

It is further preferred that the limit bearing 2 comprises a lower limit bearing 21 connected to the support base 11 and an upper limit bearing 22 connected to the cover plate 12. The support seat 11 is connected with at least two lower limit bearings 21 arranged at intervals, and the lower limit bearings 21 are arranged below the driving shaft 3 and are abutted against the driving shaft 3 to bear the driving shaft 3. The cover plate 12 is connected with at least one upper limit bearing 22, and when the cover plate 12 is in the first state, the outer ring of the upper limit bearing 22 is abutted against the outer peripheral surface of the driving shaft 3 and is matched with the lower limit bearing 21 to clamp and fix the driving shaft 3.

As shown in fig. 3, in an embodiment of the present application, there are three limit bearings 2, two lower limit bearings 21 are disposed on the support base 11, an upper limit bearing 22 is disposed on the cover plate 12, and the three limit bearings 2 surround to form a triangle. The two lower limit bearings 21 are used for bearing the driving shaft 3, and when the cover plate 12 is in the first state, the upper limit bearing 22 can press the driving shaft 3 onto the two lower limit bearings 21 to fix the driving shaft 3.

As shown in fig. 4, in another embodiment of the present application, there are four limit bearings 2A, three lower limit bearings 21A are connected to the support base 11A, and an upper limit bearing 22A is provided on the cover plate 12A, using the arrangement shown in the figure. Wherein a lower limit bearing 21A that is located the below is used for bearing drive shaft 3A, and two lower limit bearings 21A that are located both sides are spacing drive shaft 3A in both sides, and the upper limit bearing 22A that is located the top can compress tightly drive shaft 3A.

When the driving assembly is used, the locking piece 13 is taken down firstly, namely the bolt is pulled out, the cover plate 12 is turned over, and the driving shaft 3 is arranged in the limiting groove 114. Cover plate 12 is closed and lock 13 is installed, i.e. plugged in. The limit bearing 2 clamps the driving shaft 3, and the installation is completed. After the operation is finished, the bolt is pulled out, the cover plate 12 is opened, and the driving shaft 3 can be conveniently taken out.

The embodiment of the invention has the following beneficial effects: this drive assembly comes the fixed drive shaft of centre gripping through replacing current single bearing with at least three spacing bearing, when reducing the vibration phenomenon of circling round of drive shaft, thereby only need remove the apron and just can open the convenient drive shaft of taking out in spacing hole.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. A drive assembly, comprising: the bearing device comprises a rack (1), at least three limiting bearings (2) and a driving shaft (3), wherein the rack (1) comprises a supporting seat (11) and a cover plate (12), the cover plate (12) is connected with the supporting seat (11), the cover plate (12) has a first state which surrounds the supporting seat (11) to form a limiting hole (15), the cover plate (12) also has a second state which opens the limiting hole (15) to form an opening, the cover plate (12) is connected with at least one limiting bearing (2), and the driving shaft (3) is arranged in the limiting hole (15); when the cover plate (12) is in the first state, the outer ring of the limiting bearing (2) is abutted against the outer peripheral surface of the driving shaft (3), and the connecting line included angle between the rotating shaft point of any two adjacent limiting bearings (2) and the rotating shaft point of the driving shaft (3) is less than 180 degrees; when the cover plate (12) is in the second state, the drive shaft (3) can move out of/into the limit hole (15) through the opening.

2. The drive assembly according to claim 1, characterized in that the limit bearing (2) is connected to both the support base (11) and the cover plate (12), and the limit bearing (2) partially extends to protrude from the inner wall of the limit hole (15).

3. The drive assembly according to claim 2, characterized in that the limit bearing (2) comprises a lower limit bearing (21) connected to the support base (11), the support base (11) connecting at least two spaced apart lower limit bearings (21), the lower limit bearing (21) being arranged below the drive shaft (3) and being abuttable to the drive shaft (3).

4. The drive assembly according to claim 1, characterized in that at least a portion of the cover plate (12) is detachably connected to the support base (11).

5. The drive assembly according to claim 1, characterized in that one end of the cover plate (12) is rotatably connected to the support base (11), and the other end of the cover plate (12) is detachably connected to the support base (11).

6. The drive assembly according to claim 5, wherein the frame (1) further comprises a locking member (13), the support base (11) and the cover plate (12) being detachably connected via the locking member (13), the locking member (13) being provided for locking the cover plate (12) and the support base (11) in the first state.

7. The drive assembly according to claim 1, characterized in that the axis of any one of the limit bearings (2) is parallel to the axis of the drive shaft (3).

8. The drive assembly according to claim 1, wherein the support base (11) is formed with a limiting groove (114), and the cover plate (12) can surround an opening of the limiting groove (114) to form the limiting hole (15).

9. The drive assembly according to claim 1, wherein the cover plate (12) comprises two cover plate sub-plates (121) arranged in parallel and spaced apart, and a cover plate central shaft (122) connecting the two cover plate sub-plates (121), the limit bearing (2) is located between the two cover plate sub-plates (121), and an inner ring of the limit bearing (2) is fixedly sleeved on the cover plate central shaft (122).

10. The driving assembly according to claim 1, wherein the supporting seat (11) comprises two supporting seat sub-plates (111) arranged in parallel and spaced apart, and a supporting seat central shaft (112) connecting the two supporting seat sub-plates (111), the limit bearing (2) is located between the two supporting seat sub-plates (111), and an inner ring of the limit bearing (2) is fixedly sleeved on the supporting seat central shaft (112).