CN213451354U - Air bearing and dead-weight Rockwell hardness machine with same - Google Patents
Air bearing and dead-weight Rockwell hardness machine with same Download PDFInfo
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- CN213451354U CN213451354U CN202022601441.0U CN202022601441U CN213451354U CN 213451354 U CN213451354 U CN 213451354U CN 202022601441 U CN202022601441 U CN 202022601441U CN 213451354 U CN213451354 U CN 213451354U
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Abstract
The application relates to an air bearing and a dead-weight Rockwell hardness machine with the same, wherein the air bearing comprises an outer frame, an air floating flat plate, a fastening piece and an elastic piece; the outer frame is in a hollow columnar shape, the air floatation flat plate is positioned on one side of the inner wall of the outer frame, a first threaded hole is formed in the side plate surface of the air floatation flat plate facing the inner wall of the outer frame, and the elastic piece is placed inside the first threaded hole; a second threaded hole is formed in the side wall of the outer frame, the fastener is screwed with the second threaded hole and the first threaded hole in sequence, and the air floatation flat plate is detachably connected with the outer frame; the fastener is abutted against the elastic part, and one side of the air floatation flat plate, which is not provided with the first threaded hole, is abutted against the main shaft; the top of the air floatation flat plate is provided with an air source hole, and the other end of the air source hole is arranged to one side of the air floatation flat plate, which is deviated from the inner wall of the outer frame. The air floatation mechanism can reduce the friction force between the air floatation mechanism and a main shaft, reduce the abrasion to the main shaft after use, reduce the influence on precision, reduce the uncertainty of introduced errors, accurately control the pressure of an air floatation flat plate by the elastic part, and improve the technical index of equipment.
Description
Technical Field
The disclosure relates to the field of hardness detection, in particular to an air bearing and a dead-weight Rockwell hardness machine with the same.
Background
With the development of science and technology, more and more fields put higher demands on the quality of products. In the field of mechanical measurement, the Rockwell hardness tester is widely applied and is mainly used for testing the hardness of various steels (including alloy steel and stainless steel). The use units must calibrate them periodically, according to certification protocol requirements.
At present, in the domestic and foreign situations, the Rockwell hardness tester products are various in types, but the Rockwell hardness tester is a fresh and available Rockwell hardness tester. The ball spline bearing is adopted at the top of the standard hardness machine produced in China at present, the friction force on the lifting main shaft is large and uncertain, the main shaft can be abraded after long-term use, the precision is influenced, and meanwhile, the uncertainty of errors is introduced.
Disclosure of Invention
In view of this, the present disclosure provides an air bearing and a dead-weight rockwell hardness machine having the same, which can reduce friction with a main shaft, reduce wear to the main shaft after long-term use, reduce influence on precision, reduce uncertainty of introduced errors, and improve technical indexes of equipment by accurately controlling pressure of an air floating plate through an elastic member.
According to one aspect of the disclosure, an air bearing is provided, which is suitable for being installed on the top of a main shaft of a dead weight type Rockwell hardness machine, and comprises an outer frame, an air floating flat plate, a fastening piece and an elastic piece;
the outer frame is in a hollow columnar shape, the air floating flat plate is positioned on one side of the inner wall of the outer frame, a first threaded hole is formed in the surface of one side, facing the inner wall of the outer frame, of the air floating flat plate, and the elastic piece is placed inside the first threaded hole;
a second threaded hole is formed in the side wall of the outer frame, and the fastener is screwed with the second threaded hole and the first threaded hole in sequence, so that the air floatation flat plate is detachably connected with the outer frame;
the fastener is abutted against the elastic part, and one side of the air floating flat plate, which is not provided with the first threaded hole, is suitable for being abutted against the main shaft;
and the top of the air floatation flat plate is provided with an air source hole, and the other end of the air source hole is arranged to one side of the air floatation flat plate, which is deviated from the inner wall of the outer frame.
In a possible implementation manner, the air-floating flat plates are provided in plurality, and the plurality of air-floating flat plates are circumferentially arranged along the inner wall of the outer frame.
In a possible implementation manner, eight air floating flat plates are arranged, and every four air floating flat plates are arranged into two groups;
each group of air floatation flat plates are arranged along the circumferential direction of the inner wall of the outer frame, and the two groups of air floatation flat plates are distributed in sequence along the axis of the outer frame.
In a possible implementation manner, the inner wall of the outer frame is rectangular, and four corners of the inner wall of the outer frame are chamfers.
In one possible implementation, the fastener is a bolt and the resilient member is a spring.
In a possible implementation manner, the fastener includes a screw and a nut, the screw is sequentially screwed into the second threaded hole and the first threaded hole, the nut is disposed on a side of the screw that is not screwed into the second threaded hole, and the nut is matched with the screw.
In one possible implementation manner, the air source holes are arranged in an L shape;
the screw rod is screwed into the first threaded hole, and the screw rod is screwed into the second threaded hole.
In a possible implementation manner, the outer frame is cylindrical, a baffle is arranged on the top side wall of the outer frame, the baffle is annular, the baffle is arranged along the circumferential direction of the top side wall of the outer frame, and the top of the baffle is flush with the top of the outer frame.
In a possible implementation manner, the air floating flat plate is in a rectangular plate shape, and the outer frame is integrally formed.
According to another aspect of the disclosure, a dead weight rockwell hardness machine is provided, including the air bearing of any one of the above.
The air bearing of the embodiment of the application is arranged at the top of the main shaft of the dead weight type Rockwell hardness machine, and the distance between the air floating flat plate and the main shaft can be adjusted through the fastener which is rotatably connected with the air floating flat plate and the outer frame. When the static-weight Rockwell hardness machine does not work, the fastener is screwed so that the air floating flat plate is abutted to the main shaft, and at the moment, no gap and pressure exist between the air floating flat plate and the main shaft. When the air source hole is communicated with the air source, the air source ventilates the air floating flat plate through the air source hole, at the moment, the air pressure between the air floating flat plate and the side surface of the main shaft is larger than the pressure between the air floating flat plate and the inner wall of the outer frame, a gap is formed between the air floating flat plate and the main shaft, and at the moment, the main shaft can freely move up and down without rotation and offset. Meanwhile, an elastic part is arranged in the first threaded hole of the air floatation flat plate, so that the elastic part deforms when the fastener is rotated, and the pressure of the fastener on the air floatation flat plate is changed. Under the structure, an operator can accurately control the pressure of the air floatation flat plate according to F ═ kxDeltax, so that the pressure of the air floatation flat plate is matched with the air inflow of the air floatation bearing in the embodiment of the application, an air gap of 10 micrometers is formed, the friction of equipment is reduced, and the technical index of the equipment is improved. To sum up, the air supporting bearing of the embodiment of the application can reduce the friction force between the air supporting bearing and the main shaft, reduces the abrasion to the main shaft after long-term use, reduces the influence on the precision, reduces the uncertainty of introduced errors, and improves the technical index of the equipment through the pressure of the accurate control air supporting plate of the elastic part.
Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
FIG. 1 illustrates an internal structural view of an air bearing of an embodiment of the present disclosure;
FIG. 2 illustrates a top view of an air bearing of an embodiment of the present disclosure;
FIG. 3 illustrates a body structure view of an air bearing according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention or for simplicity in description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Fig. 1 is a view showing an internal structure of an air bearing according to an embodiment of the present application. FIG. 2 illustrates a top view of an air bearing according to an embodiment of the present application. Fig. 3 is a main body structural view of an air bearing according to an embodiment of the present application. As shown in fig. 1, 2 or 3, the air bearing is used for being installed on the top of a main shaft 500 of a dead weight rockwell hardness machine, and comprises: the frame 100, the air supporting plate 200, the fastener 300 and the elastic member 400, wherein the frame 100 is in a hollow column shape, the air supporting plate 200 is located at one side of the inside of the frame 100, a first threaded hole is formed in a side plate surface of the air supporting plate 200 facing to the inner wall of the frame 100, and the elastic member 400 is placed inside the first threaded hole. The side wall of the outer frame 100 is provided with a second threaded hole, and the fastener 300 is screwed with the second threaded hole and the first threaded hole in sequence, so that the air floating plate 200 and the outer frame 100 are detachably connected through the fastener 300. When the fastener 300 is screwed into the first threaded hole, one end of the fastener 300 screwed into the first threaded hole abuts against the elastic member 400, and the side of the air floating plate 200 not provided with the first threaded hole is used for abutting against the spindle 500. The top of the air floating plate 200 is opened with an air source hole 210, and the other end of the air source hole 210 is opened to the side of the air floating plate 200 departing from the inner wall of the outer frame 100.
The air bearing of the embodiment of the application is arranged at the top of the main shaft 500 of the dead weight type Rockwell hardness machine, and the distance between the air floating flat plate 200 and the main shaft 500 can be adjusted by rotating the fastener 300 for connecting the air floating flat plate 200 and the outer frame 100. When the dead-weight rockwell hardness machine is not in operation, the fastener 300 is tightened to enable the air floating flat plate 200 to abut against the spindle 500, and at the moment, no gap exists between the air floating flat plate 200 and the spindle 500 and pressure is applied. When the air source holes 210 are communicated with the air source, the air source ventilates the air floating flat plate 200 through the air source holes 210, at the moment, the air pressure between the air floating flat plate 200 and the side surface of the main shaft 500 is larger than the pressure between the air floating flat plate 200 and the inner wall of the outer frame 100, a gap is formed between the air floating flat plate 200 and the main shaft 500, and at the moment, the main shaft 500 can freely move up and down without rotation and offset. Meanwhile, an elastic member 400 is placed in the first threaded hole of the air floating plate 200, so that the elastic member 400 is deformed when the fastening member 300 is rotated, thereby changing the pressure of the fastening member 300 not floating on the air floating plate 200. Under the structure, an operator can accurately control the pressure of the air floating flat plate 200 according to F ═ k × Δ x, so that the pressure of the air floating flat plate 200 is matched with the air inflow of the air floating bearing in the embodiment of the application, an air gap of 10 μm is formed, the friction of the equipment is reduced, and the technical index of the equipment is improved. To sum up, the air bearing of the embodiment of the present application can reduce the friction force between the air bearing and the main shaft 500, reduce the wear to the main shaft 500 after long-term use, reduce the influence on the precision, reduce the uncertainty of the introduced error, and simultaneously improve the technical index of the equipment by the pressure of the elastic member 400 accurately controlling the air floating plate 200.
In one possible implementation manner, a plurality of air floating plates 200 are provided, and a plurality of air floating plates 200 are circumferentially arranged along the inner wall of the outer frame 100. The number of the fasteners 300 is matched with the number of the air floating flat plates 200, the number of the second threaded holes is matched with the number of the air floating flat plates 200, and the number of the elastic members 400 is matched with the number of the air floating flat plates 200.
Further, in a possible implementation manner, eight air floating flat plates 200 are provided, and every four air floating flat plates 200 are arranged in two groups, each group of air floating flat plates 200 is arranged along the circumferential direction of the inner wall of the outer frame 100, and two air floating flat plates 200 are sequentially distributed along the axis of the outer frame 100.
In a possible implementation manner, the inner wall of the outer frame 100 is rectangular, and four corners of the inner wall of the outer frame 100 are chamfers. Here, it should be noted that two air floating flat plates 200 are disposed on each inner wall of the outer frame 100, the two air floating flat plates 200 are distributed along the axial direction of the outer frame 100, the side walls of the two air floating flat plates 200 in the vertical direction are arranged in parallel, and the central points of the two air floating flat plates 200 are arranged on the axial line of the corresponding inner wall of the outer frame 100 in the vertical direction.
In one possible implementation, the fastener 300 is a bolt.
Further, in one possible implementation, the bolt is a half-tooth bolt.
In another possible implementation, the fastener 300 may include a screw and a nut, the screw is screwed into the second threaded hole and the first threaded hole in sequence, and the nut is screwed on a side of the screw that is not screwed into the second threaded hole. The nut can be provided with two, and two nuts screw in the screw rod in proper order, and when the nut that is located the most marginal when rotatory, first nut and second nut butt, the screw rod is rotatory.
In one possible implementation, the resilient member 400 is a spring.
In one possible implementation manner, the air source holes 210 are disposed in an "L" shape, an opening at one end of the air source hole 210 is located at the top of the air floating plate 200, and an opening at the other end of the air source hole 210 is located on a plate surface of the air floating plate 200 on a side facing away from the inner wall of the outer frame 100 (i.e., an opening at the other end of the air source hole 210 is located on a plate surface of the air floating plate 200 on a side facing the spindle 500).
In a possible implementation manner, the outer frame 100 is cylindrical, a baffle 110 is disposed on a top side wall of the outer frame 100, the baffle 110 is annular, the baffle 110 is disposed along a circumferential direction of the top side wall of the outer frame 100, and a top of the baffle 110 is flush with a top of the outer frame 100.
In one possible implementation, the air floating plate 200 is rectangular plate-shaped, and the outer frame 100 is integrally formed. Thus, the preparation of the outer frame 100 can be facilitated.
In a possible implementation manner, the axis of the first threaded hole is overlapped with the axis of the air floating flat plate 200 perpendicular to the plate surface. The first threaded hole does not penetrate through the plate surface of the air floating plate 200.
Based on any one of the air bearing, the disclosure also provides a dead-weight Rockwell hardness machine. The dead-weight Rockwell hardness machine of the embodiment of the disclosure comprises the air bearing as described in any one of the above. By installing any one of the air bearing on the top side wall of the main shaft 500 of the dead weight type Rockwell hardness machine, when the main shaft 500 rises to be in a preparation state of working, a gap is generated between the air floating flat plate 200 in the air bearing and the main shaft 500, the friction force between the air bearing and the main shaft 500 is reduced, the abrasion to the main shaft 500 in the long-term use of the dead weight type Rockwell hardness machine is reduced, the influence on the precision is reduced, the uncertainty of an introduced error is reduced, meanwhile, the pressure of the air floating flat plate 200 can be accurately controlled through the elastic part 400, and the technical index of the equipment is improved.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. An air bearing is suitable for being installed at the top of a main shaft of a dead weight type Rockwell hardness machine and is characterized by comprising an outer frame, an air floating flat plate, a fastening piece and an elastic piece;
the outer frame is in a hollow columnar shape, the air floating flat plate is positioned on one side of the inner wall of the outer frame, a first threaded hole is formed in the surface of one side, facing the inner wall of the outer frame, of the air floating flat plate, and the elastic piece is placed inside the first threaded hole;
a second threaded hole is formed in the side wall of the outer frame, and the fastener is screwed with the second threaded hole and the first threaded hole in sequence, so that the air floatation flat plate is detachably connected with the outer frame;
the fastener is abutted against the elastic part, and one side of the air floating flat plate, which is not provided with the first threaded hole, is suitable for being abutted against the main shaft;
and the top of the air floatation flat plate is provided with an air source hole, and the other end of the air source hole is arranged to one side of the air floatation flat plate, which is deviated from the inner wall of the outer frame.
2. The air bearing of claim 1, wherein the plurality of air bearing plates are disposed circumferentially along an inner wall of the outer frame.
3. The air bearing of claim 2, wherein eight of the air bearing plates are provided, one set of four air bearing plates being provided in two sets;
each group of air floatation flat plates are arranged along the circumferential direction of the inner wall of the outer frame, and the two groups of air floatation flat plates are distributed in sequence along the axis of the outer frame.
4. The air bearing as recited in claim 1, wherein the inner wall of the outer frame is rectangular and the corners of the inner wall of the outer frame are chamfered.
5. The air bearing of claim 1 wherein the fastener is a bolt and the resilient member is a spring.
6. The air bearing of claim 1 wherein the fastener comprises a threaded rod and a nut, the threaded rod is threaded into the second threaded bore and the first threaded bore in sequence, the nut is disposed on a side of the threaded rod that is not threaded into the second threaded bore, and the nut is mated to the threaded rod.
7. The air bearing as recited in claim 6, wherein the air source holes are disposed in an "L" shape;
the screw rod is screwed into the first threaded hole, and the screw rod is screwed into the second threaded hole.
8. The air bearing as recited in claim 1, wherein the outer frame is cylindrical, a baffle is disposed on a top side wall of the outer frame, the baffle is annular, the baffle is disposed along a circumferential direction of the top side wall of the outer frame, and a top of the baffle is flush with a top of the outer frame.
9. The air bearing as recited in claim 1, wherein the air bearing plate is rectangular and the outer frame is integrally formed.
10. A dead-weight rockwell hardness machine comprising the air bearing of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022601441.0U CN213451354U (en) | 2020-11-11 | 2020-11-11 | Air bearing and dead-weight Rockwell hardness machine with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022601441.0U CN213451354U (en) | 2020-11-11 | 2020-11-11 | Air bearing and dead-weight Rockwell hardness machine with same |
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| CN213451354U true CN213451354U (en) | 2021-06-15 |
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| CN202022601441.0U Active CN213451354U (en) | 2020-11-11 | 2020-11-11 | Air bearing and dead-weight Rockwell hardness machine with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11698284B2 (en) * | 2017-08-07 | 2023-07-11 | Anyload Youngzon Transducer (Hangzhou) Co., Ltd. | Ultra-low module stress protected load cell |
-
2020
- 2020-11-11 CN CN202022601441.0U patent/CN213451354U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11698284B2 (en) * | 2017-08-07 | 2023-07-11 | Anyload Youngzon Transducer (Hangzhou) Co., Ltd. | Ultra-low module stress protected load cell |
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