CN218377361U - Spacer ring device of grinding machine spindle - Google Patents

Abstract

The utility model provides a space ring device of a grinder spindle, wherein an inner space ring of the space ring device comprises a first inner ring body and a second inner ring body which are arranged at intervals along the length direction of a spindle core, and the first inner ring body and the second inner ring body are elastically connected through a plurality of first springs which are arranged at intervals in the circumferential direction; the outer space ring comprises a first outer ring body and a second outer ring body which are arranged along the length direction of the shaft core at intervals, and the first outer ring body and the second outer ring body are elastically connected through a plurality of second springs which are arranged at intervals in the circumferential direction. When the end face of the inner spacer of the utility model is worn, the inner spacer keeps and compensates the axial distance between the adjusted bearing inner rings under the action of the first spring; when the end face of the outer space ring is abraded, the outer space ring keeps and compensates the adjusted axial distance between the outer rings of the bearings under the action of the second spring. The utility model discloses under the condition of not dismantling the grinding machine main shaft, alright realize the automatic compensation of interior spacer ring and outer spacer ring wearing and tearing volume.

Description

Spacer ring device of grinding machine spindle

Technical Field

The utility model belongs to the grinding machine field, concretely relates to spacer ring device of grinding machine main shaft.

Background

The main shaft of the grinding machine is a core part of the grinding machine, and parts are ground by rotating a grinding wheel arranged on the main shaft, so that the parts can reach required flatness and smoothness. A grinding machine spindle generally includes a spindle core connected to a rotary driving member for mounting a grinding wheel, a sleeve sleeved outside the spindle core, and a plurality of bearings disposed between the spindle core and the sleeve. To facilitate the assembly of the main shaft and to ensure the axial distance between the bearings, a spacer ring (comprising an inner spacer ring and an outer spacer ring) is usually provided between two bearings at the same end of the shaft core, as disclosed in CN 201610491640.6.

In the technical scheme, after the bearing and the space ring are used for a period of time, the end surface of the space ring is abraded, and particularly for a precision grinding machine, the abrasion of the end surface of the space ring is more serious due to the high rotating speed of the main shaft, so that the processing precision of the grinding machine is reduced accordingly. The repair method adopted at present is to disassemble a main shaft of the grinding machine and replace a space ring, but the workload is large and the cost is higher.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving the technical problem who exists among the prior art, the utility model aims at providing a spacer ring device of grinding machine main shaft.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a spacer ring device of a grinding machine spindle comprises a spindle core, an outer barrel and a plurality of bearings, wherein the outer barrel is sleeved outside the spindle core, the bearings are arranged between the spindle core and the outer barrel, the spacer ring device is arranged between the two bearings at one end of the spindle core and used for keeping the axial distance between the two bearings, and comprises an inner spacer ring and an outer spacer ring, the inner spacer ring is sleeved outside the spindle core and used for keeping the axial distance between the inner rings of the two bearings, and the outer spacer ring is sleeved outside the inner spacer ring and used for keeping the axial distance between the outer rings of the two bearings; the inner spacer comprises a first inner ring body and a second inner ring body which are arranged at intervals along the length direction of the shaft core, and the first inner ring body and the second inner ring body are elastically connected through a plurality of first springs which are arranged at intervals along the circumferential direction; the outer space ring comprises a first outer ring body and a second outer ring body which are arranged along the length direction of the shaft core at intervals, and the first outer ring body and the second outer ring body are elastically connected through a plurality of second springs which are arranged at intervals in the circumferential direction.

In the technical scheme, the axial distance between the two bearing inner rings is ensured by the inner spacer, the first inner ring body and the second inner ring body of the inner spacer are elastically connected through a plurality of first springs, and when the end surfaces of the first inner ring body and/or the second inner ring body, which are in contact with the bearing, are abraded, the inner spacer keeps and compensates the adjusted axial distance between the bearing inner rings under the action of the elastic force of the plurality of first springs; the axial distance between the two bearing outer rings is ensured by the outer space ring, the first outer ring body and the second outer ring body of the outer space ring are elastically connected through the second springs, and when the end surfaces of the first outer ring body and/or the second outer ring body, which are in contact with the bearings, are abraded, the outer space ring keeps and compensates the adjusted axial distance between the bearing outer rings under the elastic action of the second springs. Use the utility model discloses a space ring device under the condition of not dismantling the grinding machine main shaft, alright realize the automatic compensation of interior space ring and outer space ring wearing and tearing volume, reduce the work load of changing the space ring and the cost of changing the space ring.

The utility model discloses an in the preferred embodiment, have a plurality of first recesses that circumference interval set up on the interior terminal surface of one of the two of first inner circle body and second inner circle body, a plurality of first springs and a plurality of first recess one-to-one setting, during first recess was gone into to the one end card of first spring, the other end of first spring offset with the interior terminal surface of another person.

Among the above-mentioned technical scheme, come to carry on spacingly to the position of first spring through setting up first recess, first recess plays the guide effect to the flexible of first spring simultaneously.

The utility model discloses an in the preferred embodiment, have a plurality of second recesses that circumference interval set up on the interior terminal surface of one of the two of first outer lane body and second outer lane body, a plurality of second springs and a plurality of second recess one-to-ones setting, during the second recess was gone into to the one end card of second spring, the other end of second spring offset with the interior terminal surface of another person.

Among the above-mentioned technical scheme, come to carry on spacingly to the position of second spring through setting up the second recess, the second recess plays the guide effect to the flexible of second spring simultaneously.

In a preferred embodiment of the present invention, the first inner ring body and the second inner ring body have the same length, and the first outer ring body and the second outer ring body have the same length.

In the technical scheme, the positions of the first inner ring body and the second inner ring body of the spacer device can be interchanged, so that the operation of the grinding machine spindle is not influenced even if a worker mistakenly installs the first inner ring body and the second inner ring body reversely.

In a preferred embodiment of the present invention, a first ring groove is provided on an inner wall of the first outer ring body near the inner end surface thereof, the first ring groove is communicated with the inner end surface of the first outer ring body, a first ring platform matched with the first ring groove is provided on an outer wall of the first inner ring body near the inner end surface thereof, and the first ring platform can be axially inserted into the first ring groove from the inner end surface of the first outer ring body; two ends of the first spring are fixedly connected with the first inner ring body and the second inner ring body respectively, and two ends of the second spring are fixedly connected with the first outer ring body and the second outer ring body respectively.

Among the above-mentioned technical scheme, the first ring platform of interior spacer is carried out axial spacing by the left side wall of first annular and the interior terminal surface of second outer ring body for interior spacer and outer spacer swing joint are a whole, and the turnover and the transportation of this spacer device of being convenient for are particularly useful for the condition of outsourcing or outer cooperation spacer device.

In another preferred embodiment of the present invention, a first ring groove/first ring groove is provided on the inner wall of the first outer ring body, and a first ring groove/first ring groove that is matched with the first ring groove/first ring groove is provided on the outer wall of the first inner ring body, and the first ring groove can be axially inserted into the first ring groove from the end surface of the first outer ring body; the inner wall of the second outer ring body is provided with a second ring groove/a second ring platform, the outer wall of the second inner ring body is provided with a second ring platform/a second ring groove matched with the second ring groove/the second ring platform, and the second ring platform can be axially inserted into the second ring groove from the end face of the second outer ring body; the two ends of the first spring are respectively abutted or fixedly connected with the first inner ring body and the second inner ring body, the two ends of the second spring are respectively fixedly connected with the first outer inner ring body and the second outer ring body, and the inner spacer is axially limited by the outer spacer through the first annular groove, the first annular table, the second annular groove and the second annular table.

In the technical scheme, the inner space ring is axially limited by the outer space ring through the first ring groove, the first ring platform, the second ring groove and the second ring platform, so that the two ends of the first spring are respectively abutted or fixedly connected with the first inner ring body and the second inner ring body under the condition that the left end of the second spring is fixedly connected with the first outer ring body and the right end of the second spring is fixedly connected with the second outer ring body.

In another preferred embodiment of the present invention, an axial clearance is provided between the side wall of the first ring groove away from the first outer ring end face and the side wall of the first ring platform, and an axial clearance is also provided between the side wall of the second ring groove away from the second outer ring end face and the side wall of the first ring platform.

In the technical scheme, the inner spacer ring and the outer spacer ring can move axially relative to each other by arranging the axial movable gap, so that the condition that the end surface abrasion amounts of the inner spacer ring and the outer spacer ring are inconsistent is adapted.

In another preferred embodiment of the present invention, a first ring groove is disposed on an inner wall of the first outer ring body close to the inner end face thereof, the first ring groove is communicated with the inner end face of the first outer ring body, a first ring platform matched with the first ring groove is disposed on an outer wall of the first inner ring body close to the inner end face thereof, and the first ring platform can be axially inserted into the first ring groove from the inner end face of the first outer ring body; the inner wall of the second outer ring body, which is close to the inner end face of the second outer ring body, is provided with a second ring groove, the second ring groove is communicated with the inner end face of the second outer ring body, the outer wall of the second inner ring body, which is close to the inner end face of the second inner ring body, is provided with a second ring platform matched with the second ring groove, and the second ring platform can be axially inserted into the second ring groove from the inner end face of the second outer ring body.

In another preferred embodiment of the present invention, a first ring groove is disposed on an inner wall of the first outer ring body close to the inner end face thereof, the first ring groove is communicated with the inner end face of the first outer ring body, a first ring platform matched with the first ring groove is disposed on an outer wall of the first inner ring body close to the inner end face thereof, and the first ring platform can be axially inserted into the first ring groove from the inner end face of the first outer ring body; the outer wall of the second inner ring body, close to the outer end face of the second inner ring body, is provided with a second ring groove, the second ring groove is communicated with the outer end face of the second inner ring body, the inner wall of the second outer ring body, close to the outer end face of the second outer ring body, is provided with a second ring platform matched with the second ring groove, and the second ring platform can be axially inserted into the second ring groove from the outer end face of the second inner ring body.

In another preferred embodiment of the present invention, a first ring groove is disposed on an outer wall of the first inner ring body near the outer end surface thereof, the first ring groove communicates with the outer end surface of the first inner ring body, a first ring platform matched with the first ring groove is disposed on an inner wall of the first outer ring body near the outer end surface thereof, and the first ring platform can be axially inserted into the first ring groove from the outer end surface of the first inner ring body; the outer wall of the second inner ring body, close to the outer end face of the second inner ring body, is provided with a second ring groove, the second ring groove is communicated with the outer end face of the second inner ring body, the inner wall of the second outer ring body, close to the outer end face of the second outer ring body, is provided with a second ring platform matched with the second ring groove, and the second ring platform can be axially inserted into the second ring groove from the outer end face of the second inner ring body.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a first schematic sectional view of a spacer device according to a first embodiment of the present application.

Figure 2 is a schematic view of the process of installing the spacer device of figure 1 into a grinding machine spindle.

Fig. 3 is a second cross-sectional structural view of a spacer device according to a first embodiment of the present application.

Fig. 4 is a schematic cross-sectional structural view of a spacer device according to a second embodiment of the present application.

Fig. 5 is a first cross-sectional structural view of a spacer device according to a third embodiment of the present application.

Fig. 6 is a second cross-sectional structural view of a spacer device according to a third embodiment of the present application.

Reference numerals in the drawings of the specification include: the bearing comprises an outer space ring 10, a first outer ring body 11, a second outer ring body 12, a second spring 13, a second groove 14, a first ring groove 15, a second ring groove 16, an inner space ring 20, a first inner ring body 21, a second inner ring body 22, a first spring 23, a first groove 24, a first ring platform 25, a second ring platform 26, a shaft core 30, a shaft shoulder 31, an outer cylinder 40, a step 41 and a bearing 50.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "transverse", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 2, in the present invention, the grinding machine spindle includes a shaft core 30 for mounting a grinding wheel, an outer cylinder 40 sleeved outside the shaft core 30, and a plurality of bearings 50 disposed between the shaft core 30 and the outer cylinder 40, and a spacer device is disposed between two bearings 50 at one end of the shaft core 30 (for example, at the left end of the shaft core 30) and is used for maintaining the axial distance between the two bearings 50. The spacer device comprises an inner spacer 20 which is sleeved outside the shaft core 30 and used for keeping the axial distance between the inner rings of the two bearings 50, and an outer spacer 10 which is sleeved outside the inner spacer 20 and used for keeping the axial distance between the outer rings of the two bearings 50. Other configurations of the grinding spindle are known in the art, for example, the structure of the grinding spindle disclosed in CN201610491640.6 can be adopted, which is irrelevant to the improvement point of the present invention and will not be described in detail herein.

Example one

In the present embodiment, a spacer device of a grinding machine spindle is modified, as shown in fig. 1 and fig. 2, in a preferred embodiment, an inner spacer 20 of the spacer device of the present embodiment includes a first inner ring body 21 and a second inner ring body 22 that are arranged at intervals along a length direction of a shaft core 30, for example, the first inner ring body 21 is located on a left side of the second inner ring body 22, and the first inner ring body 21 and the second inner ring body 22 are elastically connected by a plurality of first springs 23 that are arranged at intervals in a circumferential direction, for example, four or six first springs 23 are arranged at intervals in the circumferential direction. The outer space ring 10 of the space ring device comprises a first outer ring body 11 and a second outer ring body 12 which are arranged at intervals along the length direction of the shaft core 30, for example, the first outer ring body 11 is positioned on the left side of the second outer ring body 12, the first outer ring body 11 is sleeved outside the first inner ring body 21, the second outer ring body 12 is sleeved outside the second inner ring body 22, the first outer ring body 11 and the second outer ring body 12 are elastically connected through a plurality of second springs 13 which are arranged at intervals in the circumferential direction, for example, four or six second springs 13 are arranged at intervals which are uniform in the circumferential direction.

With such a technical solution, as shown in fig. 2, the outer cylinder 40 is firstly sleeved on the shaft core 30, and then the right bearing 50, the spacer device, and the left bearing 50 are sequentially installed on the shaft core 30, and then fixed by an outer ring gland and an inner ring nut (not shown). The right end of the inner ring of the right bearing 50 is tightly propped against the shaft shoulder 31 of the shaft core 30, and the left end of the inner ring of the right bearing 50 is tightly propped against the right end of the second inner ring body 22; the right end of the outer ring of the right bearing 50 is tightly abutted with the step 41 on the inner wall of the outer cylinder 40, and the left end of the outer ring of the right bearing 50 is tightly abutted with the right end of the second outer ring body 12. The right end of the inner ring of the left bearing 50 is tightly propped against the left end of the first inner ring body 21, and the left end of the inner ring of the left bearing 50 is tightly propped against the inner ring nut; the right end of the outer ring of the left bearing 50 is tightly abutted with the left end of the first outer ring body 11, and the left end of the outer ring of the left bearing 50 is tightly abutted with the outer ring gland.

The utility model discloses an axial distance between two bearing 50 inner circles is guaranteed to interior spacer 20, through a plurality of first spring 23 elastic connection between the first inner circle body 21 of interior spacer 20 and the second inner circle body 22, when the terminal surface of first inner circle body 21 and/or second inner circle body 22 and bearing 50 contact was worn and torn, under a plurality of first spring 23's elastic force effect, axial distance between the bearing 50 inner circle that interior spacer 20 kept and compensated to have adjusted. The outer space ring 10 ensures the axial distance between the outer rings of the two bearings 50, the first outer ring body 11 and the second outer ring body 12 of the outer space ring 10 are elastically connected through the plurality of second springs 13, and when the end surfaces of the first outer ring body 11 and/or the second outer ring body 12, which are in contact with the bearings 50, are worn, the outer space ring 10 maintains and compensates the adjusted axial distance between the outer rings of the bearings 50 under the elastic force of the plurality of second springs 13. Therefore, under the condition of not disassembling the main shaft of the grinding machine, the automatic compensation of the abrasion loss of the inner space ring 20 and the outer space ring 10 can be realized, and the workload of replacing the space ring and the cost of replacing the space ring are reduced.

As shown in fig. 1, in another preferred embodiment, a plurality of first grooves 24 are formed on an inner end surface of one of the first inner ring body 21 and the second inner ring body 22 (an end surface where the first inner ring body 21 and the second inner ring body 22 are close to each other is an inner end surface), the first grooves 24 being circumferentially spaced, for example, the first grooves 24 are formed on the inner end surface of the first inner ring body 21, the first springs 23 are provided in one-to-one correspondence with the first grooves 24, left ends of the first springs 23 are clamped into the first grooves 24, and right ends of the first springs 23 abut against the inner end surface of the second inner ring body 22.

A plurality of second grooves 14 arranged at intervals in the circumferential direction are formed in an inner end surface of one of the first outer ring body 11 and the second outer ring body 12 (an end surface of the first outer ring body 11 and the second outer ring body 12 close to each other is the inner end surface), for example, the second grooves 14 are formed in the inner end surface of the second inner ring body 22, the plurality of second springs 13 and the plurality of second grooves 14 are arranged in a one-to-one correspondence manner, the left ends of the second springs 13 are clamped into the second grooves 14, and the right ends of the second springs 13 abut against the inner end surface of the second outer ring body 12.

In another preferred embodiment, as shown in fig. 1, a first ring groove 15 is formed on an inner wall of the first outer ring body 11 near the inner end surface thereof, a right end of the first ring groove 15 communicates with the inner end surface of the first outer ring body 11, a first ring land 25 engaged with the first ring groove 15 is formed on an outer wall of the first inner ring body 21 near the inner end surface thereof, and the first ring land 25 is axially insertable into the first ring groove 15 from the inner end surface of the first outer ring body 11.

When the space ring device is assembled, the first inner ring body 21 is inserted into the first outer ring body 11, then the first spring 23 is arranged in the first groove 24, the left end of the first spring 23 is fixedly connected to the bottom of the first groove 24 in a glue bonding or welding mode, then the second inner ring body 22 is coaxial with the first inner ring body 21, and the right end of the first spring 23 is fixedly connected to the inner end face of the second inner ring body 22 in a glue bonding or welding mode. Then, the second spring 13 is installed in the second groove 14, the left end of the second spring 13 is fixedly connected to the bottom of the second groove 14 in a glue bonding or welding mode, then the second outer space ring 10 is coaxially sleeved outside the second inner ring body 22, and the right end of the second spring is fixedly connected to the inner end face of the second outer space ring 10 in a glue bonding or welding mode. It should be noted that, in order to ensure that the second inner ring body 22 is coaxial with the first inner ring body 21, when the spacer device is assembled, the second inner ring body 22 and the first inner ring body 21 can be sleeved on the positioning shaft for auxiliary installation.

In the above scheme, the first annular platform 25 of the inner spacer 20 is axially limited by the left side wall of the first annular groove 15 and the inner end face of the second outer ring body 12, so that the inner spacer 20 and the outer spacer 10 are movably connected into a whole, which is convenient for the turnover and transportation of the spacer device, and is especially suitable for outsourcing or outsourcing spacer devices; after the first ring groove 15 and the first ring platform 25 are arranged, the inner spacing ring 20 and the outer spacing ring 10 can still rotate relatively, and the operation of the spindle of the grinding machine is not influenced.

Preferably, after the spacer device is installed in the grinding machine spindle, an axial movable gap is formed between the left side wall of the first ring groove 15 far away from the inner end face of the first outer ring body 11 and the left side wall of the first ring platform 25. The inner space ring 20 and the outer space ring 10 can move relatively to each other axially, so that the condition that the end surface abrasion amounts of the inner space ring 20 and the outer space ring 10 are inconsistent is adapted.

In another preferred embodiment, as shown in fig. 1, a second ring groove 16 is formed on the inner wall of the second outer ring body 12 near the inner end surface thereof, the left end of the second ring groove 16 communicates with the inner end surface of the second outer ring body, a second land 26 which engages with the second ring groove 16 is formed on the outer wall of the second inner ring body 22 near the inner end surface thereof, and the second land 26 can be axially inserted into the second ring groove 16 from the inner end surface of the second outer ring body 12. After the spacer device is installed in the grinding machine spindle, an axial movable gap is also formed between the right side wall of the second annular groove 16 far away from the inner end face of the second outer ring body 12 and the right side wall of the second annular table 26.

The order of assembling the components of the spacer device according to the present embodiment is the same as that of merely providing the first ring groove 15 and the first ring land 25, and is not described herein, but the difference is that in the present embodiment, since the second ring groove 16 and the second ring land 26 are additionally provided, and the inner spacer 20 is axially limited by the outer spacer 10 through the first ring groove 15, the first ring land 25, the second ring groove 16, and the second ring land 26, in the case where the left end of the second spring 13 is fixed to the first outer ring body 11 and the right end of the second spring 13 is fixed to the second outer ring body 12, both ends of the first spring 23 are in contact with or fixed to the first inner ring body 21 and the second inner ring body 22, respectively, preferably in contact.

In another preferred embodiment, the first inner ring body 21 and the second inner ring body 22 have the same length, and the first outer ring body 11 and the second outer ring body 12 have the same length. As shown in fig. 3, when the spacer device is provided with the first ring groove 15, the first ring land 25, the second ring groove 16 and the second ring land 26 at the same time, or the first ring groove 15, the first ring land 25, the second ring groove 16 and the second ring land 26 are not provided at all, the positions of the first inner ring body 21 and the second inner ring body 22 can be interchanged, so that the operation of the grinding machine spindle is not affected even when the positions of the first inner ring body 21 and the second inner ring body 22 are reversed.

Example two

The structure principle of the present embodiment is substantially the same as that of the first embodiment, except that the second annular groove 16 and the second annular land 26 are disposed at different positions. As shown in fig. 4, in the present embodiment, a second ring groove 16 is provided on an outer wall of the second inner ring body 22 near an outer end surface thereof (an end surface where the first inner ring body 21 and the second inner ring body 22 are away from each other is an outer end surface), the second ring groove 16 communicates with the outer end surface of the second inner ring body 22, a second ring land 26 that mates with the second ring groove 16 is provided on an inner wall of the second outer ring body 12 near the outer end surface thereof, and the second ring land 26 can be axially inserted into the second ring groove 16 from the outer end surface of the second inner ring body 22. When the spacer device is installed in the grinding machine spindle, an axial movable gap is also formed between the left side wall of the second ring groove 16 far away from the outer end face of the second outer ring body 12 and the left side wall of the second ring platform 26.

In the present embodiment, both ends of the first spring 23 are respectively abutted or fixed to the first inner ring body 21 and the second inner ring body 22, and both ends of the second spring 13 are respectively fixed to the first outer ring body 11 and the second outer ring body 12.

EXAMPLE III

The structure principle of this embodiment is substantially the same as that of the second embodiment, except that the first ring groove 15 and the first land 25 are disposed at different positions. As shown in fig. 5, in the present embodiment, a first ring groove 15 is provided on an outer wall of the first inner ring body 21 near the outer end face thereof, the first ring groove 15 communicates with the outer end face of the first inner ring body 21, a first annular land 25 that mates with the first ring groove 15 is provided on an inner wall of the first outer ring body 11 near the outer end face thereof, and the first annular land 25 can be axially inserted into the first ring groove 15 from the outer end face of the first inner ring body 21. After the spacer device is installed in the grinding machine spindle, an axial movable gap is also formed between the right side wall of the first ring groove 15, which is far away from the outer end face of the second outer ring body 12, and the right side wall of the second ring platform 26.

In the present embodiment, both ends of the first spring 23 are respectively abutted or fixed to the first inner ring body 21 and the second inner ring body 22, and both ends of the second spring 13 are respectively fixed to the first outer ring body 11 and the second outer ring body 12.

In the case of the embodiment, since the first inner ring body 21 and the second inner ring body 22 have the same length, the positions of the first inner ring body 21 and the second inner ring body 22 of the spacer device can be changed as shown in fig. 6, and therefore, when the positions of the first inner ring body 21 and the second inner ring body 22 are reversed, the operation of the grinding machine spindle is not affected.

In the description of the present specification, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A spacer ring device of a grinding machine spindle comprises a spindle core, an outer barrel and a plurality of bearings, wherein the outer barrel is sleeved outside the spindle core, the bearings are arranged between the spindle core and the outer barrel, the spacer ring device is arranged between the two bearings at one end of the spindle core and used for keeping the axial distance between the two bearings, the spacer ring device comprises an inner spacer ring and an outer spacer ring, the inner spacer ring is sleeved outside the spindle core and used for keeping the axial distance between the inner rings of the two bearings, and the outer spacer ring is sleeved outside the inner spacer ring and used for keeping the axial distance between the outer rings of the two bearings; the inner spacer is characterized by comprising a first inner ring body and a second inner ring body which are arranged at intervals along the length direction of a shaft core, wherein the first inner ring body and the second inner ring body are elastically connected through a plurality of first springs which are arranged at intervals along the circumferential direction; the outer space ring comprises a first outer ring body and a second outer ring body which are arranged along the length direction of the shaft core at intervals, and the first outer ring body and the second outer ring body are elastically connected through a plurality of second springs which are arranged at intervals in the circumferential direction.

2. The spacer device for the grinding machine spindle as claimed in claim 1, wherein the inner end surface of one of the first inner ring body and the second inner ring body is provided with a plurality of first grooves arranged at intervals in the circumferential direction, the plurality of first springs and the plurality of first grooves are arranged in a one-to-one correspondence manner, one end of each first spring is clamped into each first groove, and the other end of each first spring abuts against the inner end surface of the other first spring.

3. The spacer device for the grinding machine spindle as claimed in claim 1, wherein the inner end surface of one of the first outer ring body and the second outer ring body is provided with a plurality of second grooves arranged at intervals in the circumferential direction, the plurality of second springs and the plurality of second grooves are arranged in a one-to-one correspondence manner, one end of each second spring is clamped into each second groove, and the other end of each second spring abuts against the inner end surface of the other second spring.

4. A cage assembly for a grinding machine spindle as claimed in claim 1 in which the first and second inner race bodies are of equal length and the first and second outer race bodies are of equal length.

5. A spacer device for a grinding machine spindle according to any one of claims 1 to 4, characterized in that a first ring groove is provided on an inner wall of the first outer ring body adjacent to the inner end surface thereof, the first ring groove communicating with the inner end surface of the first outer ring body, and a first ring land cooperating with the first ring groove is provided on an outer wall of the first inner ring body adjacent to the inner end surface thereof, the first ring land being axially insertable into the first ring groove from the inner end surface of the first outer ring body;

two ends of the first spring are fixedly connected with the first inner ring body and the second inner ring body respectively, and two ends of the second spring are fixedly connected with the first outer inner ring body and the second outer ring body respectively.

6. A spacer device for a grinding machine spindle according to any one of claims 1 to 4, characterized in that the inner wall of the first outer ring body is provided with a first ring groove/first ring land, the outer wall of the first inner ring body is provided with a first ring land/first ring groove matched with the first ring groove/first ring land, and the first ring land can be axially inserted into the first ring groove from the end face of the first outer ring body;

a second annular groove/a second annular table is arranged on the inner wall of the second outer ring body, a second annular table/a second annular groove matched with the second annular groove/the second annular table is arranged on the outer wall of the second inner ring body, and the second annular table can be axially inserted into the second annular groove from the end face of the second outer ring body;

the both ends of first spring respectively with first inner circle body and second inner circle body butt or rigid coupling, the both ends of second spring respectively with first outer inner circle body and second outer circle body rigid coupling, interior spacer pass through first annular, first ring platform, second annular and second ring platform by outer spacer axial is spacing.

7. The spacer device for the grinding machine spindle as claimed in claim 6, wherein an axially movable gap is provided between the side wall of the first ring groove away from the end surface of the first outer ring body and the side wall of the first ring platform, and an axially movable gap is also provided between the side wall of the second ring groove away from the end surface of the second outer ring body and the side wall of the first ring platform.

8. The spacer device for the grinding machine spindle as claimed in claim 6, wherein a first ring groove is formed on an inner wall of the first outer ring body near the inner end surface thereof, the first ring groove communicates with the inner end surface of the first outer ring body, a first ring land which is engaged with the first ring groove is formed on an outer wall of the first inner ring body near the inner end surface thereof, and the first ring land is axially inserted into the first ring groove from the inner end surface of the first outer ring body;

the inner wall that the second outer ring body is close to its interior terminal surface sets up the second annular, the second annular communicates with each other with the interior terminal surface of second outer ring body, the second inner ring body be close to its interior terminal surface on the outer wall set up with second annular groove complex second ring platform, the second ring platform can follow the interior terminal surface axial of second outer ring body and insert in the second annular.

9. The spacer device for the grinding machine spindle as claimed in claim 6, wherein a first ring groove is formed on an inner wall of the first outer ring body near the inner end surface thereof, the first ring groove communicates with the inner end surface of the first outer ring body, a first ring land which is engaged with the first ring groove is formed on an outer wall of the first inner ring body near the inner end surface thereof, and the first ring land is axially inserted into the first ring groove from the inner end surface of the first outer ring body;

the outer wall of the second inner ring body, close to the outer end face of the second inner ring body, is provided with a second ring groove, the second ring groove is communicated with the outer end face of the second inner ring body, the inner wall of the second outer ring body, close to the outer end face of the second outer ring body, is provided with a second ring platform matched with the second ring groove, and the second ring platform can be axially inserted into the second ring groove from the outer end face of the second inner ring body.

10. The spacer device for the grinding machine spindle as claimed in claim 6, wherein a first ring groove is formed in an outer wall of the first inner ring body near the outer end surface thereof, the first ring groove communicates with the outer end surface of the first inner ring body, a first ring land which is engaged with the first ring groove is formed in an inner wall of the first outer ring body near the outer end surface thereof, and the first ring land is axially inserted into the first ring groove from the outer end surface of the first inner ring body;

the outer wall of the second inner ring body, close to the outer end face of the second inner ring body, is provided with a second ring groove, the second ring groove is communicated with the outer end face of the second inner ring body, the inner wall of the second outer ring body, close to the outer end face of the second outer ring body, is provided with a second ring platform matched with the second ring groove, and the second ring platform can be axially inserted into the second ring groove from the outer end face of the second inner ring body.

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