CN220162158U - Axial thrust static pressure centerless grinding wheel shaft - Google Patents

Abstract

The utility model discloses an axial thrust static pressure centerless grinding wheel shaft, wherein a main shaft is of a multi-step symmetrical structure, a bearing supporting unit I and a bearing supporting unit II are arranged at the left end and the right end of the main shaft, the bearing supporting unit I and the bearing supporting unit II are respectively arranged and installed in a machine seat of a machine tool, and a high-pressure oil film supporting main shaft is formed on the circumferences of steps at the two ends of the main shaft through hydraulic oil; the grinding wheel clamping device is arranged at the middle of the grinding wheel shaft and is fixedly provided with a grinding wheel; the left end of the grinding wheel shaft is provided with a bearing thrust device, namely a thrust ring is arranged, the displacement of the bearing supporting unit I is axially fixed, and the right end is provided with a connecting device which is externally connected with a driving device. The static pressure centerless grinding wheel shaft is axially stopped and pushed, a rolling bearing is replaced by a dynamic and static pressure bearing, the rotation precision is high, and the precision of a processed product is high; through one end setting thrust device, prevent the axial of main shaft and cluster and move, bear great axial load, the mobile structure that one end set up in addition, make things convenient for centerless grinding machine tool equipment to install and adjust, strong adaptability.

Description

Axial thrust static pressure centerless grinding wheel shaft

Technical Field

The utility model belongs to the technical field of bearing ring grinding and processing, and relates to a static pressure centerless grinding wheel shaft capable of being axially stopped and pushed.

Background

In the cylindrical grinding process of a general bearing ring, the number of batches is large, and especially the clamping of a large-sized bearing ring is difficult, and the production efficiency and the precision are effectively ensured by adopting centerless grinding machine equipment. The main functional components of the centerless grinding equipment, namely the grinding wheel shaft, are a mechanical main shaft, and a rolling bearing and a thrust bearing are installed, so that the radial load and the axial load born by the main shaft on the outer diameter of a rotary grinding bearing ring are solved.

Patent CN2675340Y discloses a grinding wheel spindle structure of a centerless grinder, the grinding wheel spindle structure of the centerless grinder comprises a spindle, the spindle is mounted on a grinding frame through bearing bushes, grinding wheels and belt wheels are respectively sleeved at two ends of the spindle, a shaft shoulder at the middle part of the spindle is connected with the grinding frame through an axial thrust mechanism, a pair of spherical washers 15 are mounted in the thrust frame 8 during assembly, the spindle 1 is sleeved into the thrust frame 8, the left spherical washer is in contact with the right end face of the shaft shoulder 14, then a pair of spherical washers are mounted in a cavity enclosed by the spindle 1 and the thrust frame 8, a spring 16 and a top column are mounted in a nut 17, the nut 17 is screwed into the thrust frame 8, as can be seen from the accompanying drawings, the grinding wheel spindle of the centerless grinder is not mounted at the middle part of the grinding wheel spindle, the belt wheel is mounted at one end of the grinding wheel spindle, in fact, the grinding wheel spindle is not a centerless grinding wheel shaft in real sense, the middle part of the grinding wheel spindle is mounted at the middle part of the spindle, but the general bearing bush type grinding wheel shaft is equivalent to the structure of the fixed spindle 1, friction rotation is performed, the resistance is larger, and the axial adjustment cannot be performed automatically and the oil pressure is easy to be damaged.

Patent CN202846274U discloses a double-bearing dynamic pressure oil film guide wheel main shaft structure of a high-precision centerless grinder, which comprises a guide wheel main shaft 1, a guide wheel 2 and chuck bodies 3, wherein the guide wheel 2 is clamped by the end surfaces of the front chuck body 3 and the rear chuck body 3 and is fixed in the middle of the guide wheel main shaft 1; the chuck body 3 is fastened with the guide wheel 2 by screws; the specification shows that a group of five-piece type ball bearing short bushes 4 at the front end of the wheel spindle 1 are arranged on the front supporting seat 5 through screw seats 18, gaskets 19, hanging screws 20 and supporting screws 21, and the inner rings of the five-piece type ball bearing short bushes 4 are matched with the wheel spindle 1 through scraping. The bearing seat 6 is fastened on the front bearing seat 5 by a screw, a bidirectional thrust ball bearing 11 is arranged in the bearing seat 6 for auxiliary bearing, and a spherical washer 12 (assembly) is used for adjusting the gap between the two. The bidirectional thrust ball bearing 11 is axially pressed by the front gland 8 and the lock nut 9, and the clearance of the bidirectional thrust ball bearing 11 is radially adjusted by the bushing 10. Therefore, five-piece ball bearing short bearing bushes are arranged at the front end and the rear end of the guide wheel shaft, and the function of bearing axial load is achieved through the bidirectional thrust ball bearing 11.

In summary, the above technical solution does not solve the problem of controlling axial bearing of the spindle and the problem of axial fixation of the dynamic and static bearings at both ends under the condition that the dynamic and static bearings replace the rolling bearings for supporting.

Disclosure of Invention

The axial thrust static pressure centerless grinding wheel shaft is provided for overcoming the defects and problems existing in the prior large-scale bearing ring grinding excircle processing, the middle part of the grinding wheel shaft is provided with a mounting grinding wheel, the two ends of the grinding wheel shaft are provided with supporting and supporting units, one end of the grinding wheel shaft is provided with a thrust device, the problem that the axial direction of a main shaft bears load is solved, and the reliability and the processing precision of the grinding wheel shaft are improved.

The utility model adopts the technical scheme that: the axial thrust static pressure centerless grinding wheel shaft comprises a main shaft, wherein a bearing supporting unit I and a bearing supporting unit II are arranged at the left end and the right end of the main shaft, a grinding wheel clamping device is arranged in the middle of the grinding wheel shaft, and a bearing thrust device is arranged at the left end of the main shaft; the right end of the main shaft is provided with a connecting device.

Further, the main shaft is arranged into a multi-step symmetrical structure with a large middle outer diameter and small outer diameters at two ends; screw hole structures uniformly distributed on the circumference are arranged on the multi-step end surfaces on two sides of the spindle.

Further, the thrust ring is sleeved on the step structure at the left end of the main shaft and is coupled and fixed with the main shaft.

Further, the right end of the main shaft is provided with a step structure, the outer surface of the smaller step is provided with a symmetrical key groove structure, and the installation flat key is arranged.

Further, the bearing supporting unit I comprises a left flange), a left bearing, a left shaft sleeve, a left end cover and a left baffle cover, wherein the left bearing is sleeved on the inner wall of the left shaft sleeve, and the left flange is fixedly arranged at the left end of the left shaft sleeve; a thrust ring is arranged between the left flange and the left bearing; the left end cover is provided with a right end compression framework oil seal arranged at the left shaft sleeve; the left baffle cover is provided with a left end inner wall compression framework oil seal provided with a left flange; the upper parts of the left flange, the left bearing and the left shaft sleeve are provided with an oil inlet channel structure; the lower parts of the left flange, the left bearing and the left shaft sleeve are provided with an oil outlet channel structure.

Further, the bearing supporting unit II comprises a right flange, a right bearing, a right shaft sleeve and a right end cover, wherein the right bearing is sleeved on the inner wall of the right shaft sleeve, and the right flange is fixedly arranged at the right end of the right shaft sleeve; the right end cover is provided with a left end compression framework oil seal arranged at the right shaft sleeve; the nut is arranged and installed on the inner wall of the right end of the right flange to compress the framework oil seal; the upper parts of the right flange, the right bearing and the right shaft sleeve are provided with an oil inlet channel structure; the lower parts of the right flange, the right bearing and the right shaft sleeve are provided with an oil outlet passage structure.

Further, the grinding wheel clamping device comprises a grinding wheel chuck I and a grinding wheel chuck II which are respectively arranged at two ends of the large step in the middle of the main shaft.

Further, the main shaft connecting device is a connecting disc, and a key groove structure matched with the key groove structure at the right end of the main shaft is arranged on the inner wall of the connecting disc; the connecting disc is sleeved and fixed on the outer surface of the right-end step of the main shaft through a flat key.

Further, a plurality of threaded through holes are axially formed in the end face of the connecting disc, and radial threaded through holes identical to the axial threaded through holes are radially formed in the outer circle of the connecting disc.

The utility model has the beneficial effects that: 1. the axial thrust static pressure centerless grinding wheel shaft has novel and reasonable structural layout, the rolling bearing is replaced by the dynamic and static pressure bearing, and the precision of the processed product is high; 2. the axial thrust static pressure centerless grinding wheel is provided with the thrust device at one end, so that axial movement of the main shaft is prevented, a grinding wheel shaft can bear larger axial load, and the reliability of the grinding wheel shaft is high; 3. the axial thrust pushing static pressure centerless grinding wheel shaft is provided with a movable structure at one end, thereby being convenient for installation and adjustment of machine tool equipment and having strong adaptability.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an axial thrust static pressure centerless grinding wheel shaft.

Fig. 2 is a schematic diagram of a spindle structure of a static pressure centerless grinding wheel shaft with axial thrust.

FIG. 3 is a schematic view of a thrust collar for an axial thrust hydrostatic centerless grinding wheel shaft.

Fig. 4 is a schematic diagram of a combined structure of a spindle and a thrust ring of an axial thrust static pressure centerless grinding wheel shaft.

Fig. 5 is a schematic diagram of a connecting disc structure of a static pressure centerless grinding wheel shaft pushed by an axial stop.

Fig. 6 is a schematic diagram of a combined structure of a spindle and a connecting disc of a static pressure centerless grinding wheel shaft which is axially stopped and pushed.

Reference numerals in the drawings: 100-left baffle cover, 200-left flange, 300-thrust ring, 400-main shaft, 500-left bearing, 600-left shaft sleeve, 700-left end cover, 800-chuck I, 900-grinding wheel, 1000-chuck II, 1100-right end cover, 1200-right shaft sleeve, 1300-right bearing, 1400-right flange, 1500-nut, 1600-connecting disc, 1700-flat key and 1800-framework oil seal.

Detailed Description

The utility model will be further described with reference to examples and drawings, to which reference is made by way of illustration, but not limitation, for the understanding of those skilled in the art.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the present utility model.

It should be noted in advance that, in the present utility model, terms such as "mounted," "connected," "secured," and the like should be construed broadly unless explicitly stated or limited otherwise. For example, the connection may be fixed connection, integral connection, direct connection or detachable connection, etc. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is described in detail below with reference to fig. 1-6 and by way of specific embodiments.

As shown in fig. 1, the axial thrust static pressure centerless grinding wheel shaft is provided with a bearing supporting unit I and a bearing supporting unit II at the left end and the right end, the bearing supporting unit I and the bearing supporting unit II are respectively arranged and installed in a machine seat of a machine tool to play a role in supporting a main shaft 400 to rotate, a grinding wheel clamping device is arranged in the middle of the grinding wheel shaft, and a grinding wheel 900 is installed in the middle of the grinding wheel clamping device; the left end of the main shaft 400 is provided with a bearing thrust device, and the right end of the main shaft 400 is provided with a connecting device.

2-4, the spindle 400 is configured to have a multi-step symmetrical structure with a large middle outer diameter and a small outer diameter at two ends, and plays a role of arranging the sleeved grinding wheel 900 in the middle; screw hole structures uniformly distributed on the circumference are arranged on the multi-step end surfaces on two sides of the spindle.

Further, the thrust ring 300 of the bearing thrust device is sleeved on the step structure at the left end of the main shaft 400, the thrust ring 300 is fixed by bolts, and the thrust ring 300 plays a role in axially fixing the left end bearing support unit I.

Further, the right end of the spindle 400 is provided with a step structure, the outer surface of the smaller step is provided with a symmetrical key slot structure, and the installation flat key 1700 is provided to play a role in transmitting torque.

The bearing supporting unit I comprises a left flange 200, a left bearing 500, a left shaft sleeve 600, a left end cover 700 and a left baffle cover 100, wherein the left bearing 500 is sleeved on the inner wall of the left shaft sleeve 600, and the left flange 200 is fixedly arranged at the left end of the left shaft sleeve 600; a mounting thrust ring 300 is provided between the left flange 200 and the left bearing 500; the left end cover 700 is arranged and installed at the right end of the left shaft sleeve 600, and plays a role in compacting the framework oil seal 1800 and preventing oil leakage, dust and the like from entering the inside of the grinding wheel shaft; the left baffle cover 100 is provided with the left end inner wall of the left flange 200, and plays a role in compacting the framework oil seal 1800 and preventing oil leakage, dust and the like from entering the grinding wheel shaft.

Further, an oil inlet channel structure is arranged at the upper parts of the left flange 200, the left bearing 500 and the left shaft sleeve 600, hydraulic oil is divided into two channels through an oil channel arranged in the left flange 200, one channel of hydraulic oil reaches the left end face of the thrust ring 300 through a radial oil channel in the left flange 200, the other channel of hydraulic oil enters the oil channel of the left bearing 500 through an axial oil channel of the left shaft sleeve 600 to the right, the oil channel is divided into an axial channel and a radial channel at the left bearing 500, the other channel of hydraulic oil reaches the right end face of the thrust ring 300 through an axial oil channel to the left, and meanwhile, the oil film is formed on the two end faces of the thrust ring 300 to bear axial thrust; one path reaches the left end oil cavity between the left bearing 500 and the main shaft 400 through the radial oil path of the left bearing 500, and an oil film is formed on the circumference of the left end of the main shaft 400, so that the main shaft 400 is supported.

Further, the lower parts of the left flange 200, the left bearing 500 and the left bushing 600 are provided with an oil outlet passage structure, and an oil return passage of the lower part of the hydraulic oil flows out of the bearing support unit i.

The bearing supporting unit II comprises a right flange 1400, a right bearing 1300, a right shaft sleeve 1200 and a right end cover 1100, wherein the right bearing 1300 is sleeved on the inner wall of the right shaft sleeve 1200, and the right flange 1400 is fixedly arranged at the right end of the right shaft sleeve 1200; the right end cover 1100 is arranged at the left end of the right shaft sleeve 1200, and plays a role in compacting the framework oil seal 1800 and preventing oil leakage, dust and the like from entering the grinding wheel shaft; the nut 1500 is installed on the right inner wall of the right flange 1400, and plays a role in compressing the framework oil seal 1800 to prevent oil leakage, dust and the like from entering the grinding wheel shaft.

Further, the upper parts of the right flange 1400, the right bearing 1300 and the right shaft sleeve 1200 are provided with oil inlet channel structures, hydraulic oil enters the oil channel of the inner left bearing 1300 through the oil channel of the right shaft sleeve 1200 through the oil channel of the right flange 1400, reaches the right end oil cavity between the right bearing 1300 and the main shaft 400, forms an oil film on the circumference of the right end of the main shaft 400, and plays a role in supporting the main shaft 400; the right flange 1400, right bearing 1300, and right sleeve 1200 are slidably positioned relative to the main shaft 400.

Further, the lower parts of the right flange 1400, the right bearing 13 and the right shaft housing 1200 are provided with oil outlet structures, and hydraulic oil flows out of the bearing support unit ii along the oil return path of the lower part.

Further, the grinding wheel clamping device comprises a grinding wheel chuck I800 and a grinding wheel chuck II 1000, wherein the grinding wheel chuck I800 and the grinding wheel chuck II 1000 are respectively arranged and installed at two ends of a large step in the middle of the main shaft 400, and are fixed with the main shaft 400 through bolts, so that the function of axially fixing the grinding wheel 900 is achieved.

Further, as shown in fig. 5-6, the spindle connection device is a connection pad 1600, and a key slot structure adapted to the key slot structure of the spindle 400 is provided on the inner wall of the connection pad 1600; the connecting disc 1600 is sleeved and fixed on the outer surface of the right end step of the main shaft 400 through a flat key 1700, and plays a role in transmitting torque.

Further, a plurality of threaded through holes are axially formed in the end face of the connecting disc 1600, radial threaded through holes identical to the axial threaded through holes are radially formed in the outer circle of the connecting disc 1600, and the connecting and fixing functions of the external driving device are achieved through bolts.

The implementation process of the utility model comprises the following steps: the bearing support unit I is arranged at the left end of the main shaft 400, and the bearing support unit II is arranged at the right end of the main shaft 400; the grinding wheel 900 is sleeved on the outer surface of the middle part of the main shaft 400 and is axially fixed through a chuck I800 and a chuck II 1000; the external hydraulic station is connected with hydraulic oil which respectively reaches the two end surfaces of the thrust ring 300 and the outer surface of the left end of the main shaft 400 through the bearing supporting unit I to form a high-pressure oil film; similarly, hydraulic oil reaches the outer surface of the right end of the main shaft 400 through the bearing supporting unit II to form a high-pressure oil film, and the main shaft 400 is suspended through the high-pressure oil films at the two ends of the main shaft 400; the external driving device drives the main shaft 400 to rotate through the connecting disc 1600, and further drives the grinding wheel 900 to rotate for grinding; in the grinding process, due to the action of the thrust device, namely the high-pressure oil films at the two ends of the thrust ring 300, the main shaft 400 can bear certain axial force, so that the rigidity of the grinding wheel shaft is improved, and the stability and reliability of the grinding wheel shaft are ensured.

Further, the framework oil seal 1800 is in sealing fit with the main shaft 400, so that leakage of hydraulic oil is prevented, and the pressure stability of a high-pressure oil film is maintained.

The above embodiments are preferred embodiments of the present utility model, and in addition, the present utility model may be implemented in other ways, and various changes and modifications may be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent changes and modifications made to the above embodiments according to the technical substance of the present utility model fall within the scope of the technical solution of the present utility model.

In order to facilitate understanding of the improvements of the present utility model over the prior art by those of ordinary skill in the art, some of the figures and descriptions of the present utility model have been simplified and some other elements are omitted from the present document for clarity, and those of ordinary skill in the art will appreciate that these omitted elements also constitute the content of the present utility model.

Claims (9)

1. The utility model provides a static pressure centerless grinding wheel axle is pushed to axial, includes main shaft (400), bearing support unit I and bearing support unit II that set up in main shaft left and right ends, sets up grinding wheel clamping device, its characterized in that in the middle of the grinding wheel axle: the left end of the main shaft (400) is provided with a bearing thrust device; the right end of the main shaft (400) is provided with a connecting device.

2. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the main shaft (400) is arranged into a multi-step symmetrical structure with a large middle outer diameter and small outer diameters at two ends; screw hole structures uniformly distributed on the circumference are arranged on the multi-step end surfaces on two sides of the main shaft (400).

3. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the thrust ring (300) is sleeved on the step structure at the left end of the main shaft (400), and the thrust ring (300) is fixedly coupled with the main shaft (400).

4. An axial thrust static centerless grinding wheel shaft according to claim 1 or 2 wherein: the right end of the main shaft (400) is provided with a step structure, the outer surface of the smaller step is provided with a symmetrical key groove structure, and a mounting flat key (1700) is arranged.

5. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the bearing supporting unit I comprises a left flange (200), a left bearing (500), a left shaft sleeve (600), a left end cover (700) and a left baffle cover (100), wherein the left bearing (500) is sleeved on the inner wall of the left shaft sleeve (600), and the left flange (200) is fixedly arranged at the left end of the left shaft sleeve (600); a thrust ring (300) is arranged between the left flange (200) and the left bearing (500); the left end cover (700) is arranged and installed at the right end of the left shaft sleeve (600) to press the framework oil seal (1800); the left baffle cover (100) is provided with a left end inner wall compression framework oil seal (1800) for installing a left flange (200); the upper parts of the left flange (200), the left bearing (500) and the left shaft sleeve (600) are provided with oil inlet channel structures; the lower parts of the left flange (200), the left bearing (500) and the left shaft sleeve (600) are provided with oil outlet channel structures.

6. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the bearing supporting unit II comprises a right flange (1400), a right bearing (1300), a right shaft sleeve (1200) and a right end cover (1100), wherein the right bearing (1300) is sleeved on the inner wall of the right shaft sleeve (1200), and the right flange (1400) is fixedly arranged at the right end of the right shaft sleeve (1200); the right end cover (1100) is provided with a compression framework oil seal (1800) arranged at the left end of the right shaft sleeve (1200); the nut (1500) is arranged and installed on the inner wall of the right end of the right flange (1400) to compress the framework oil seal (1800); the upper parts of the right flange (1400), the right bearing (1300) and the right shaft sleeve (1200) are provided with oil inlet channel structures; the lower parts of the right flange (1400), the right bearing (1300) and the right shaft sleeve (1200) are provided with oil outlet channel structures.

7. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the grinding wheel clamping device comprises a grinding wheel chuck I (800) and a grinding wheel chuck II (1000), wherein the grinding wheel chuck I (800) and the grinding wheel chuck II (1000) are respectively arranged at two ends of a large step in the middle of the main shaft (400).

8. An axial thrust static pressure centerless grinding wheel shaft as defined in claim 1 wherein: the main shaft connecting device is a connecting disc (1600), and a key groove structure matched with the key groove structure at the right end of the main shaft (400) is arranged on the inner wall of the connecting disc (1600); the connecting disc (1600) is sleeved and fixed on the outer surface of the right end step of the main shaft (400) through a flat key (1700).

9. The axially-thrust static-pressure centerless grinding wheel shaft of claim 8 wherein: the end face of the connecting disc (1600) is axially provided with a plurality of threaded through holes, and the outer circle of the connecting disc (1600) is radially provided with radial threaded through holes which are the same as the axial threaded through holes.