Air static pressure spindle with rotation error monitoring function

Abstract

The utility model discloses a kind of air static pressure main shafts with rotary error monitoring function, including air static pressure bearing, the thickening portion of annular structure is formed on the outer ring of air static pressure bearing and projects, multiple grooves are equipped with on the surface of thickening portion in annular structure, storage groove is vertically equipped with on the inner wall surface of groove, positioning port is vertically equipped with on the bottom surface of storage groove and penetrates thickening portion, adjusting ring is sleeved on the outer ring of air static pressure bearing, connecting groove of annular structure is formed in the inner ring recess of adjusting ring, connecting ring is equipped with in connecting groove, sensor is equipped with above groove. The utility model structure is simple, realizes the real-time, multipoint monitoring of air static pressure main shaft rotary error by telescopic sensor design, effectively guarantees processing precision. Meanwhile, sensor can be hidden protection under non-working state, prolongs service life, overall structure is compact, easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of air static pressure spindle technology, specifically to an air static pressure spindle with rotation error monitoring function. Background Technology

[0002] An air static pressure spindle is a precision spindle that uses high-pressure gas (usually compressed air or nitrogen) to form a rigid gas film between the spindle and the bearing, thereby achieving non-contact, frictionless, and high-precision rotation.

[0003] Currently, air static pressure spindles lack necessary monitoring devices, especially for monitoring rotational error. The presence of rotational error will affect the quality of subsequent machining. At present, they are generally only inspected once after production, and after passing the inspection, they are sent to the market. However, after use, the rotational error will change, and it is impossible to quickly detect it, thus affecting the machining accuracy. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an air static pressure spindle with rotation error monitoring function, which has its own monitoring function and can perform detection at any time, so as to solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: an air static pressure spindle with rotation error monitoring function, including an air static pressure bearing, a thickened part with a ring structure protruding on the outer ring of the air static pressure bearing, a plurality of grooves with a ring structure on the surface of the thickened part, a storage groove vertically provided on the inner wall of each groove, a positioning port vertically provided on the bottom surface of each storage groove penetrating the thickened part, an adjusting ring fitted on the outer ring of the air static pressure bearing, a connecting groove with a recessed inner ring forming a ring structure, a connecting ring provided in the connecting groove, a sensor provided above each groove, a positioning rod installed at the position of each sensor opposite the positioning port, the other end of each positioning rod passing through the storage groove and the positioning port and fixedly connected to the connecting ring, a cover plate installed at the end of each sensor away from the positioning rod, a spindle installed at the center of the air static pressure bearing, and a plurality of test strips embedded in the spindle.

[0006] As a preferred technical solution, the inner ring surface of the adjusting ring is provided with an internal thread, and the outer ring surface of the air static pressure bearing is provided with an external thread. The adjusting ring is connected to the external thread on the air static pressure bearing through the internal thread, and the outer ring surface of the adjusting ring is provided with anti-slip texture.

[0007] As a preferred technical solution, the inner ring surface of the connecting groove is provided with a positioning groove of an annular structure, and the outer ring of the connecting ring is installed with a positioning ring at the positioning groove. The outer ring of the positioning ring is slidably disposed in the positioning groove, and the inner ring of the positioning ring is sleeved on the outer ring of the air static pressure bearing and is fitted with the outer ring.

[0008] As a preferred technical solution, each storage tank has a wiring hole on its inner side that communicates with the outside. Each wiring hole is fitted with a rubber layer, and each wiring hole has a compression spring installed on its outer end face. Each compression spring has a retaining ring installed on its other end. Each retaining ring has a screw hole on its outer ring face, and each screw hole has a bolt threaded into it for clamping the wire.

[0009] As a preferred technical solution, the length and width of the cover plate match the length and width of the groove, and the thickness of the cover plate matches the depth of the groove.

[0010] As a preferred technical solution, the length and width of the groove are both larger than the length and width of the storage slot.

[0011] As a preferred technical solution, the sensor is a displacement sensor.

[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure. After rotating the adjusting ring, it can drive the connecting ring to push the positioning rod and displacement sensor upward, so that the displacement sensor is exposed from the storage groove and faces the detection strip. The multi-point distributed displacement sensors can detect the rotation error to ensure the processing accuracy. When not in use, the displacement sensor can be moved downward by the adjusting ring until it is hidden in the storage groove, and the cover plate can cover the groove to prevent the entry of external dust and impurities, thus ensuring the service life of the displacement sensor. The wire connected to the displacement sensor passes through the fixing ring, compression spring and wiring hole, and is tightened and fixed by bolts. When the displacement sensor rises, it can squeeze the compression spring, so that the displacement sensor can rise smoothly. After the displacement sensor descends, it can pull the wire outward, avoiding the excessively long wire remaining in the storage groove and affecting the descent of the displacement sensor. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a side view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the air static pressure bearing of this utility model;

[0017] Figure 4This is a schematic diagram of the structure of the adjusting ring, positioning rod, and sensor of this utility model.

[0018] Among them, 1. Air static pressure bearing; 2. Main shaft; 3. Monitoring bar; 4. Thickened part; 5. Groove; 6. Storage slot; 7. Sensor; 8. Cover plate; 9. Compression spring; 10. Fixing ring; 11. Bolt; 12. Adjusting ring; 13. Positioning rod; 14. Wiring hole; 15. Connecting ring; 16. Positioning port. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses an air static pressure spindle with rotation error monitoring function, comprising an air static pressure bearing 1. A thickened portion 4 protrudes from the outer ring of the air static pressure bearing 1 to form an annular structure. Multiple grooves 5 are provided in an annular structure on the surface of the thickened portion 4. Storage grooves 6 are vertically provided on the inner wall of each groove 5. Positioning ports 16 penetrating the thickened portion 4 are vertically provided on the bottom surface of each storage groove 6. An adjusting ring 12 is fitted onto the outer ring of the air static pressure bearing 1. A connecting groove with an annular structure is formed by a recess in the inner ring of the adjusting ring 12. A connecting ring 15 is provided in the connecting groove. Sensors 7 are provided above each groove 5. Positioning rods 13 are installed at the positions of the sensors 7 opposite the positioning ports 16. The other ends of the positioning rods 13 pass through the storage grooves 6 and the positioning ports 16 and are fixedly connected to the connecting rings 15. A cover plate 8 is installed at the end of each sensor 7 away from the positioning rods 13. A spindle 2 is installed at the center of the air static pressure bearing 1, and multiple test strips are embedded in the spindle 2.

[0023] In this embodiment, the inner ring surface of the adjusting ring 12 is provided with an internal thread, and the outer ring surface of the air static pressure bearing 1 is provided with an external thread. The adjusting ring 12 is connected to the external thread on the air static pressure bearing 1 through the internal thread, and the outer ring surface of the adjusting ring 12 is provided with anti-slip texture.

[0024] In this embodiment, the inner ring surface of the connecting groove is provided with a positioning groove with an annular structure. The outer ring of the connecting ring 15 is equipped with a positioning ring at the positioning groove. The outer ring of the positioning ring is slidably disposed in the positioning groove. The inner ring of the positioning ring is sleeved on the outer ring of the air static pressure bearing 1 and is fitted with the outer ring.

[0025] The positioning ring and positioning groove enable the adjusting ring and the connecting ring to be movably connected. When the adjusting ring descends, it can pull the connecting ring, thereby driving the positioning rod to rise and fall through the connecting ring.

[0026] In this embodiment, each inner side of the storage tank 6 is provided with a wiring hole 14 that communicates with the outside. Each wiring hole 14 is equipped with a rubber layer. Each outer end face of the wiring hole 14 is equipped with a compression spring 9. Each other end of the compression spring 9 is equipped with a fixing ring 10. Each outer ring face of the fixing ring 10 is provided with a screw hole. Each screw hole is threaded with a bolt 11 for pressing the wire.

[0027] The wires of sensor 7 pass through wiring hole 14 and are secured by retaining ring 10 and bolt 11. During the up-and-down movement of sensor 7, the wires are kept under moderate tension by compression spring 9 to prevent the wires from accumulating or tangling in storage slot 6, ensuring smooth movement of sensor 7.

[0028] In this embodiment, the length and width of the cover plate 8 match the length and width of the groove 5, and the thickness of the cover plate 8 matches the depth of the groove 5.

[0029] In this embodiment, the length and width of the groove 5 are both greater than the length and width of the storage slot 6, so that the cover plate cannot enter the storage slot. After the cover plate is lowered, it can enter the groove and the top surface of the cover plate is flush with the top surface of the thickened part to ensure the flatness of the upper surface.

[0030] In this embodiment, sensor 7 is a displacement sensor.

[0031] When rotational error monitoring is required, rotating the adjusting ring 12 causes it to move axially because its internal thread engages with the external thread of the outer ring of the air static pressure bearing 1. The movement of the adjusting ring 12 drives the connecting ring 15 to move synchronously. The connecting ring 15, through the positioning rod 13, pushes the sensor 7 and the cover plate 8 upwards, causing the sensor 7 to extend from the storage slot 6 and face the test strip 3 on the main shaft 2. At this time, the cover plate 8 moves out of the groove 5, and the sensor 7 enters the working position.

[0032] As the spindle 2 rotates, the test strip 3, embedded in the spindle 2, rotates along with it. Multiple sensors 7 (displacement sensors) arranged in a ring detect the radial displacement changes on the surface of the test strip 3 in real time. The sensors 7 transmit the detected displacement signals to an external processing system (not shown in the figure) via wires. By analyzing the data from multiple sensors, the rotational error (including radial runout, etc.) of the spindle 2 during rotation can be calculated.

[0033] When monitoring is finished or the sensor is no longer needed, rotate the adjusting ring 12 in the reverse direction to move the adjusting ring 12, connecting ring 15, and positioning rod 13 downwards, causing the sensor 7 and cover plate 8 to return to their initial positions. At this time, the sensor 7 is completely hidden inside the storage slot 6, and the cover plate 8 seals the opening of the groove 5, effectively preventing dust and impurities from entering the storage slot 6 and protecting the sensor 7 from contamination and damage.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. An air static pressure spindle with rotation error monitoring function, characterized in that: The system includes an air static pressure bearing (1), on the outer ring of which a thickened portion (4) protrudes to form an annular structure. Multiple grooves (5) are provided in an annular structure on the surface of the thickened portion (4). Storage grooves (6) are vertically provided on the inner wall of each groove (5). A positioning port (16) penetrating the thickened portion (4) is vertically provided on the bottom surface of each storage groove (6). An adjusting ring (12) is fitted onto the outer ring of the air static pressure bearing (1). The inner ring of the adjusting ring (12) is recessed to form an annular connecting groove. A connecting ring (15) is provided in the groove, and a sensor (7) is provided above the groove (5). A positioning rod (13) is installed on the sensor (7) opposite the positioning port (16). The other end of the positioning rod (13) passes through the storage groove (6) and the positioning port (16) and is fixedly connected to the connecting ring (15). A cover plate (8) is installed on the end of the sensor (7) away from the positioning rod (13). A spindle (2) is installed at the center of the air static pressure bearing (1). Multiple test strips are embedded on the spindle (2).

2. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: The inner ring of the adjusting ring (12) is provided with an internal thread, and the outer ring of the air static pressure bearing (1) is provided with an external thread. The adjusting ring (12) is connected to the external thread on the air static pressure bearing (1) through the internal thread. The outer ring of the adjusting ring (12) is provided with anti-slip texture.

3. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: The inner ring surface of the connecting groove is provided with a positioning groove with an annular structure. The outer ring of the connecting ring (15) is equipped with a positioning ring at the positioning groove. The outer ring of the positioning ring is slidably set in the positioning groove. The inner ring of the positioning ring is sleeved on the outer ring of the air static pressure bearing (1) and fits against the outer ring.

4. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: The inner side of the storage tank (6) is provided with wiring holes (14) that communicate with the outside. Each wiring hole (14) is equipped with a rubber layer. Each wiring hole (14) is equipped with a compression spring (9) on the outer end face of the wiring hole (14). Each compression spring (9) is equipped with a fixing ring (10) on the other end. Each fixing ring (10) is equipped with a screw hole on the outer ring face of the fixing ring (10). Each screw hole is threaded with a bolt (11) for pressing the wire.

5. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: The length and width of the cover plate (8) match the length and width of the groove (5), and the thickness of the cover plate (8) matches the depth of the groove (5).

6. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: The length and width of the groove (5) are both greater than the length and width of the storage slot (6).

7. The air static pressure spindle with rotation error monitoring function according to claim 1, characterized in that: Sensor (7) is a displacement sensor.

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