CN219062249U

CN219062249U - Main shaft structure capable of nondestructively disassembling ball bearing

Info

Publication number: CN219062249U
Application number: CN202223013900.9U
Authority: CN
Inventors: 郑永铭; 侯宗毅; 刘元林; 林祺; 麦焕嘉
Original assignee: Xiamen Situo Servo Technology Co ltd
Current assignee: Xiamen Situo Servo Technology Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-05-23
Anticipated expiration: 2032-11-09

Abstract

The utility model discloses a main shaft structure of a nondestructive dismounting ball bearing, wherein a shaft core body is rotatably mounted in a shell; the ball bearing inner ring is sleeved on the outer periphery of the shaft core body; the outer end of the bearing seat is detachably arranged at the end part of the shell, and the inner end of the bearing seat is clamped between the inner wall of the shell and the outer ring of the ball bearing; the auxiliary dismounting piece is sleeved on the periphery of the shaft core body and can rotate along with the rotation of the shaft core body; the lock nut is in threaded connection with the outer end of the shaft core body, and the inner end of the lock nut is pressed against the outer end of the ball bearing inner ring; during disassembly, the bearing seat is pulled outwards along the axial direction of the shaft core body, and the ball bearing is driven to move outwards simultaneously under the auxiliary pulling of the auxiliary disassembly piece. In the whole disassembly process, the jackscrew does not need to be in direct contact with the ball bearing, the inner ring and the outer ring of the ball bearing cannot be damaged, and the risk of damage to the ball bearing is reduced. Meanwhile, the disassembly steps are simple, the operation is convenient, and the disassembly can be completed without using large-scale bearing disassembly tools such as a puller and the like.

Description

Main shaft structure capable of nondestructively disassembling ball bearing

Technical Field

The utility model relates to the field of spindles, in particular to a spindle structure capable of nondestructively disassembling a ball bearing.

Background

Currently, the main shafts on the market, including electric main shafts and mechanical main shafts, mostly adopt ball bearing fit. Because the main shaft mechanical precision is high, compact structure, if meet the condition that the part precision is bad and need to dismantle the bearing or need to dismantle the bearing when the machine is dismantled in the maintenance after sale in the assembly process, the bearing is difficult to dismantle. The conventional main shaft structure adopts the existing bearing disassembling tool to pull the puller, is difficult to directly disassemble, is inconvenient to operate, cannot pull the inner ring of the bearing, and can lead to scrapping of the bearing when the outer ring is pulled. Thus, there is necessarily a risk of damage to the bearings when they are pulled, and the high price of the spindle bearings will result in a significant cost penalty.

For example, the Chinese patent application number is 201920910308.8, the name is a rolling bearing mounting structure capable of being assembled and disassembled in an axial direction without damage, the front part of the rotating shaft is provided with a conical shaft extension, the outer extending end of the conical shaft extension is provided with threads, the inner ring of the rolling bearing is in matched connection with the conical shaft extension at the front part of the rotating shaft through a conical shaft sleeve, and the outer ring of the rolling bearing is in matched connection with the inner hole of the bearing seat. An inner hole of an inner ring of the rolling bearing is in interference connection with an outer cylindrical surface of the conical shaft sleeve, and an outer cylindrical surface of an outer ring of the rolling bearing is in clearance or transition fit connection with an inner hole of the bearing seat; the inner hole of the conical shaft sleeve is a conical hole, and the conical hole of the conical shaft sleeve is matched with the conical shaft extension at the front part of the rotating shaft; the overhanging end of the conical shaft is connected with an axial positioning nut through threads. When the axial positioning device is installed, the assembly part of the rolling bearing and the conical shaft sleeve is sleeved on the conical shaft extension of the pump rotating shaft, then the axial positioning nut is screwed in, the conical shaft sleeve is pressed tightly, the axial positioning of the inner ring of the rolling bearing is realized, and then the whole rotor assembly part is installed in the bearing seat and the bearing cover is installed. However, it is not clearly described in this patent how to disassemble the rolling bearing without damage. If the puller is used for disassembling, the disassembling process is extremely complex, and the bearing is easily damaged.

Disclosure of Invention

The utility model provides a main shaft structure of a nondestructive detachable ball bearing, which overcomes the defects existing in the background technology. The technical scheme adopted for solving the technical problems is as follows:

a spindle structure of a nondestructive detachable ball bearing, comprising:

a housing;

a shaft core rotatably attached within the housing;

the ball bearing is sleeved with the inner ring of the ball bearing at the periphery of the shaft core body;

the outer end of the bearing seat is detachably arranged at the end part of the shell, and the inner end of the bearing seat is clamped between the inner wall of the shell and the outer ring of the ball bearing;

the auxiliary dismounting piece is sleeved on the periphery of the shaft core body and can rotate along with the rotation of the shaft core body;

and the locking nut is in threaded connection with the outer end part of the shaft core body, and the inner end of the locking nut is pressed against the outer end of the ball bearing inner ring.

In a preferred embodiment: the auxiliary dismounting piece comprises a ring body and a first boss fixedly connected to the periphery of the ring body, the inner wall of the ring body is sleeved on the periphery of the shaft core body, and the outer end of the ring body abuts against the inner end surface of the ball bearing inner ring; the inner end of the bearing seat is provided with a second boss extending towards the axial direction of the shaft core body, the auxiliary dismounting piece is not contacted with the bearing seat in the rotation process of the shaft core body, and when the ball bearing is dismounted, the bearing seat is pulled outwards along the axial direction of the shaft core body, and a pulling force is applied to the first boss through the second boss so as to enable the auxiliary dismounting piece and the ball bearing to synchronously move outwards.

In a preferred embodiment: the periphery of the shaft core body is provided with a limiting step, and the inner end of the ring body is abutted against the limiting step.

In a preferred embodiment: the bearing seat comprises a bearing seat body which is hollow and is positioned at the inner end and a connecting table which is positioned at the outer end, the second boss is fixedly connected at the inner end part of the bearing seat body, the connecting table is fixedly connected at the outer end part of the bearing seat body and extends towards the direction opposite to the direction of the second boss, the connecting table is propped against the outer end surface of the shell, and a locking piece is additionally arranged and detachably fixes the connecting table and the end part of the shell.

In a preferred embodiment: the locking piece is a locking screw, the connecting table is provided with a through hole, the end part of the shell is provided with a locking screw hole, and the locking screw is in threaded fit with the locking screw hole after passing through the through hole.

In a preferred embodiment: the connecting table is also provided with an internally and externally penetrated jackscrew hole, and is additionally provided with a jackscrew which is in threaded connection with the jackscrew hole, the tail end of the jackscrew is propped against the end face of the shell after the jackscrew passes through the jackscrew hole, and the bearing seat, the auxiliary dismounting piece and the ball bearing can be driven to synchronously move to the outer side of the shell by rotating the jackscrew.

In a preferred embodiment: the end face of the shell is provided with a limiting sinking groove for limiting the jackscrew, and when the jackscrew is propped against the end of the shell, the tail end of the jackscrew stretches into the limiting sinking groove.

In a preferred embodiment: the first boss is located in the bearing seat, and the inner end of the torus stretches out of the second boss.

Compared with the background technology, the technical proposal has the following advantages:

1. the application is provided with supplementary dismantlement spare, and during the dismantlement, with the help of extracting tool jackscrew, the in-process of outwards pulling the bearing frame along axle core axial drives ball bearing simultaneously outside the removal under the supplementary pulling of supplementary dismantlement spare. In the whole disassembly process, the jackscrew does not need to be in direct contact with the ball bearing, the inner ring and the outer ring of the ball bearing cannot be damaged, and the risk of damage to the ball bearing is reduced. Meanwhile, the disassembly step is simple, the operation is convenient, the disassembly can be completed without using large-scale bearing disassembly tools such as a puller, and the main shaft structure is more suitable for the conditions of smaller and smaller size and compactness.

2. When the main shaft rotates normally, the auxiliary dismounting piece is not in contact with the bearing seat, namely, the auxiliary dismounting piece cannot interfere with the normal operation of the main shaft, and the high-speed and high-precision operation can be met. And dismantle the in-process, along with the bearing frame jack-up, the second boss leans on first boss, when outwards pulling the bearing frame, the second boss can drive first boss synchronous outside removal, and then makes ball bearing also synchronous outside removal, realizes the linkage between bearing frame and the ball bearing with the cooperation of two bosss, design benefit also is applicable to the more small and exquisite main shaft of present design.

3. The inner end of the ring body is abutted against the limiting step, and the limiting step can limit the auxiliary dismounting piece axially inwards.

4. The locking piece detachably fixes the connecting table and the end part of the shell, and the connecting table is positioned on the end surface of the shell, so that the bearing seat and the shell are more directly and conveniently assembled and disassembled.

5. The locking screw passes through the perforation and then is in threaded fit with the locking screw hole, so that the locking between the connecting table and the shell is realized, and meanwhile, the disassembly process is also convenient.

6. After the lock nut and the lock screw are disassembled, the bearing seat can be disassembled from the shell through the cooperation of the jackscrew and the jackscrew hole, the screw cooperation of the jackscrew and the jackscrew hole is also completed outside the shell, the visualization degree is high, and the damage to the ball bearing can not be caused.

Drawings

The utility model is further described below with reference to the drawings and examples.

Fig. 1 is a schematic view of the outer end surface of a spindle according to a preferred embodiment.

FIG. 2 is a schematic E-E sectional view of a spindle of a preferred embodiment.

Fig. 3 shows a partial enlarged view of fig. 2.

FIG. 4 shows a schematic A-A cross-sectional view of the spindle of a preferred embodiment.

Fig. 5 shows a partial enlarged view of fig. 4.

FIG. 6 is a schematic cross-sectional view of a preferred embodiment of the fitting of the jackscrew to the jackscrew bore.

Fig. 7 shows a partial enlarged view of fig. 6.

FIG. 8 is a schematic cross-sectional view of the auxiliary disassembling member of a preferred embodiment.

FIG. 9 is a schematic cross-sectional view of a bearing housing of a preferred embodiment.

Fig. 10 is a schematic perspective view of a housing according to a preferred embodiment.

Fig. 11 is a schematic perspective view of a shaft core according to a preferred embodiment.

Detailed Description

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the terms "fixedly attached" and "fixedly attached" are to be construed broadly as any manner of connection without any positional or rotational relationship between the two, i.e. including non-removable, fixed, integrally connected, and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1 to 11, a preferred embodiment of a spindle structure of a nondestructive detachable ball bearing includes a housing 10, a shaft core 20, a ball bearing 30, a bearing housing 40, an auxiliary detachable member 50, and a lock nut 60.

The spindle 1 has two ends, and the spindle structure in the present application relates to only one of the ends. Taking fig. 2 as an example, the left end of the spindle 1 may be of a conventional design, and the spindle structure protected in this application is the structure of the right end of the spindle 1, and in the following description, the outer ends of the respective components represent the side toward the right end in fig. 2, and the inner ends of the respective components represent the side toward the left end in fig. 2.

The outer end face of the shell 10 is provided with a locking screw hole 11. As shown in fig. 2 and 10, the locking screw holes 11 are provided with four and annularly spaced.

In this embodiment, the end face of the housing 10 is provided with a limiting sink 12 for limiting the jackscrew 2, and when the jackscrew 2 abuts against the end of the housing 10, the end of the jackscrew 2 extends into the limiting sink 12. Specifically, the limit countersink 12 is provided with four lock screw holes 11 which are staggered.

The shaft core 20 is rotatably attached within the housing 10.

In this embodiment, a limiting step 21 is disposed on the outer periphery of the shaft core 20. Specifically, the limiting step 21 is annular.

The ball bearing 30 is sleeved with the inner ring of the ball bearing at the periphery of the shaft core 20.

The bearing housing 40 is detachably mounted at its outer end to the end of the housing 10, and is sandwiched between the inner wall of the housing 10 and the outer ring of the ball bearing 30 at its inner end.

In this embodiment, the bearing seat 40 is provided at an inner end thereof with a second boss 41 extending toward the axial direction of the shaft core 20.

In this embodiment, the bearing seat 40 includes a hollow bearing seat body 42 at an inner end and a connection table 43 at an outer end, the second boss 41 is fixedly connected at the inner end of the bearing seat body 42, the connection table 43 is fixedly connected at the outer end of the bearing seat body 42 and extends in a direction opposite to the direction of the second boss 41, the connection table 43 abuts against the outer end face of the housing 10, and a locking member 44 is further provided, and the locking member 44 detachably fixes the connection table 43 and the end of the housing 10.

In this embodiment, the locking member 44 is a locking screw, and the connection platform 43 is provided with a through hole 45, and the locking screw passes through the through hole 45 and is in threaded engagement with the locking screw hole 11 of the housing 10.

The auxiliary dismounting member 50 is sleeved on the outer periphery of the shaft core 20, and can rotate along with the rotation of the shaft core 20.

In this embodiment, the auxiliary dismounting member 50 includes a ring body 51 and a first boss 52 fixedly connected to the outer periphery of the ring body 51, the inner wall of the ring body 51 is sleeved on the outer periphery of the shaft core 20, and the outer end of the ring body 51 abuts against the inner end face of the inner ring of the ball bearing 30; the inner end of the bearing seat 40 is provided with a second boss 41 extending towards the axial direction of the shaft core 20, the auxiliary dismounting piece 50 is not contacted with the bearing seat 40 in the rotation process of the shaft core 20, and when the ball bearing 30 is dismounted, in the process of pulling the bearing seat 40 outwards along the axial direction of the shaft core 20, a pulling force is applied to the first boss 52 through the second boss 41, so that the auxiliary dismounting piece 50 and the ball bearing 30 synchronously move outwards.

In this embodiment, the first boss 52 is located in the bearing seat 40, and the inner end of the annular body 51 abuts against the limiting step 21. The inner wall of the annular body 51 is in clearance fit with the outer periphery of the shaft core 20.

Meanwhile, for convenience in subsequent disassembly, the inner end of the annular body 51 may extend out of the second boss 41, as shown in fig. 7, so that the auxiliary disassembly piece 50 is conveniently ejected from the bearing seat 40 by subsequent bare hands.

The lock nut 60 is screwed on the outer end of the shaft core 20, and the inner end of the lock nut is pressed against the outer end of the inner ring of the ball bearing 30; during disassembly, in the process of pulling the bearing seat 40 axially outwards along the shaft core 20, the ball bearing 30 is driven to move outwards simultaneously under the auxiliary pulling of the auxiliary disassembly piece.

In this embodiment, the connection table 43 is further provided with a jack screw hole 46 penetrating inside and outside, and a jack screw 2 is further provided, the jack screw 2 is in threaded engagement with the jack screw hole 46, and after passing through the jack screw hole 46, the end of the jack screw 2 abuts against the end face of the housing 10, and the bearing seat 40, the auxiliary dismounting member 50 and the ball bearing 30 can be driven to move synchronously to the outside of the housing 10 by rotating the jack screw 2.

The method for disassembling the main shaft structure comprises the following steps:

step 10, fixing the main shaft 1; in this embodiment, in step 10, the spindle 1 may be fixed to a three-jaw chuck.

Step 20, loosening the locking piece 44 and the locking nut 60;

in step 30, the jackscrew 2 is inserted into the jackscrew hole 46 and is in threaded engagement with the jackscrew hole 46, the jackscrew 2 is rotated until the end of the jackscrew 2 abuts against the end face of the housing 10, and then the jackscrew 2 is continuously rotated, as shown in fig. 7, the bearing seat 40 can move along the jackscrew 2 to the outside of the housing 10, and the ball bearing 30 and the auxiliary dismounting member 50 synchronously move to the outside of the housing 10 until the bearing seat 40, the ball bearing 30 and the auxiliary dismounting member 50 are taken out of the housing 10 as a whole.

In this embodiment, in step 30, a limiting sink 12 for limiting the jackscrew 2 may be provided on the end face of the housing 10, and when the end of the jackscrew 2 abuts against the end face of the housing 10, the end of the jackscrew 2 extends into the limiting sink 12.

Step 40, the auxiliary disassembly piece 50 is ejected outwards along the central axis of the auxiliary disassembly piece 50 to drive the ball bearing 30 to eject outwards, and the disassembly is completed at this time. In this step, the auxiliary dismounting member 50 can be ejected by bare hands without the aid of other tools.

The application is provided with supplementary dismantlement piece 50, and during the dismantlement, with the help of extracting tool jackscrew, the in-process of pulling bearing frame 40 outwards along axle core 20 axial drives ball bearing 30 simultaneously to the outside removal of casing 10 under the supplementary pulling of supplementary dismantlement piece 50. The jackscrew need not with ball bearing direct contact in the whole dismantlement process, can not produce the damage to ball bearing 30's inner circle and outer lane, has reduced the risk of ball bearing 30 damage. Meanwhile, the disassembly step is simple, the operation is convenient, the disassembly can be completed without using large-scale bearing disassembly tools such as a puller, and the main shaft structure is more suitable for the conditions of smaller and smaller size and compactness.

The foregoing description is only illustrative of the preferred embodiments of the present utility model, and therefore should not be taken as limiting the scope of the utility model, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.

Claims

1. The utility model provides a can harmless main shaft structure who dismantles ball bearing which characterized in that: it comprises the following steps:

a housing;

a shaft core rotatably attached within the housing;

2. The spindle structure of claim 1, wherein the ball bearing is non-destructively removable, and wherein: the auxiliary dismounting piece comprises a ring body and a first boss fixedly connected to the periphery of the ring body, the inner wall of the ring body is sleeved on the periphery of the shaft core body, and the outer end of the ring body abuts against the inner end surface of the ball bearing inner ring; the inner end of the bearing seat is provided with a second boss extending towards the axial direction of the shaft core body, and the auxiliary dismounting piece is not contacted with the bearing seat in the rotation process of the shaft core body; when the ball bearing is dismounted, in the process of pulling the bearing seat axially outwards along the shaft core body, the second boss is abutted against the first boss so as to apply tension to the first boss, so that the auxiliary dismounting piece and the ball bearing synchronously move outwards.

3. A spindle structure for a nondestructive detachable ball bearing according to claim 2, wherein: the periphery of the shaft core body is provided with a limiting step, and the inner end of the ring body is abutted against the limiting step.

4. A spindle structure for a nondestructive detachable ball bearing according to claim 2, wherein: the bearing seat comprises a bearing seat body which is hollow and is positioned at the inner end and a connecting table which is positioned at the outer end, the second boss is fixedly connected at the inner end part of the bearing seat body, the connecting table is fixedly connected at the outer end part of the bearing seat body and extends towards the direction opposite to the direction of the second boss, the connecting table is propped against the outer end surface of the shell, and a locking piece is additionally arranged and detachably fixes the connecting table and the end part of the shell.

5. The spindle structure of claim 4, wherein the ball bearing is removable without loss: the locking piece is a locking screw, the connecting table is provided with a through hole, the end part of the shell is provided with a locking screw hole, and the locking screw is in threaded fit with the locking screw hole after passing through the through hole.

6. The spindle structure of claim 4, wherein the ball bearing is removable without loss: the connecting table is also provided with an internally and externally penetrated jackscrew hole, and is additionally provided with a jackscrew which is in threaded connection with the jackscrew hole, the tail end of the jackscrew is propped against the end face of the shell after the jackscrew passes through the jackscrew hole, and the bearing seat, the auxiliary dismounting piece and the ball bearing can be driven to synchronously move to the outer side of the shell by rotating the jackscrew.

7. The spindle structure of claim 6, wherein the ball bearing is removable without loss: the end face of the shell is provided with a limiting sinking groove for limiting the jackscrew, and when the jackscrew is propped against the end of the shell, the tail end of the jackscrew stretches into the limiting sinking groove.

8. A spindle construction for a nondestructive detachable ball bearing according to claim 3, wherein: the first boss is located in the bearing seat, and the inner end of the torus stretches out of the second boss.