Glass grating ruler

Abstract

The invention relates to the technical field of glass grating rulers, in particular to a glass grating ruler which comprises a numerical control machine tool, a mounting seat is fixedly mounted in the numerical control machine tool, a glass circular grating ruler is mounted on the mounting seat, a rotating ring is rotatably connected to the mounting seat, and a fixed seat is fixedly connected to the rotating ring. A transmission mechanism is arranged on one side of the movable air guide frame in a sliding fit mode, a grating ruler cleaning mechanism is rotatably connected to the movable air guide frame, and a motor cover is fixedly arranged in the mounting base in a penetrating connection mode. Metal cuttings on the surface of the grating ruler can be efficiently removed through the bristles, dependence on manual intervention is reduced through automatic cleaning, the labor intensity of manual cleaning and the misoperation possibility are reduced, meanwhile, grating ruler damage caused by improper cleaning of operators is avoided, and the working efficiency is improved. And the reading of the grating ruler is not interfered and the operation stability of a machine tool is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of glass grating rulers, and in particular to a glass grating ruler. Background Art

[0002] Glass grating ruler is a precision measuring tool, widely used in fields that require high-precision displacement measurement, such as CNC machine tools, precision machining, semiconductor equipment and other high-precision position control and measurement applications. The core technology of glass grating ruler is based on the grating principle, which can accurately measure the position change by reading the scale and displacement.

[0003] The working principle of glass grating ruler is based on optical interference technology. It consists of two parts: grating ruler (or grating strip) and photoelectric reading head. Grating ruler (glass ruler): usually consists of glass substrate and grating stripes with tiny spacing engraved on its surface. Each grating stripe has a very fine spacing (usually micron level), which reflects light and produces interference patterns.

[0004] Photoelectric reading head: The photoelectric reading head transmits light to the surface of the grating scale and receives the light reflected from the grating stripes. Since the spacing of the grating stripes is precise, the displacement of the grating scale can be accurately calculated by analyzing the interference changes of these reflected lights through the photoelectric detector. The photoelectric head usually outputs a corresponding electrical signal according to the change of the interference pattern.

[0005] When glass grating scales are used in CNC machine tools, metal chips produced by cutting can easily fall onto the surface of the grating scale during the CNC machine tool processing. Especially during high-speed processing, these solid debris can physically block the grating stripes. Since existing glass grating scales are not easy to clean automatically, the photoelectric reading head cannot correctly read the reflection or transmission signal of the grating, which may cause measurement errors or even damage the photoelectric reading head.

[0006] In summary, the prior art lacks technology for automatic cleaning and maintenance of glass grating scales. Summary of the invention

[0007] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a glass grating ruler.

[0008] In order to achieve the above purpose, the technical solution adopted by the present invention is: a glass grating scale, including a CNC machine tool, a mounting seat is fixedly installed in the CNC machine tool, a glass circular grating scale is installed on the mounting seat, a rotating ring is rotatably connected to the mounting seat, a fixed seat is connected and fixed to the rotating ring, a movable air guide frame is slidably provided on the fixed seat, a transmission mechanism is slidably provided on one side of the movable air guide frame, a grating scale cleaning mechanism is rotatably connected to the movable air guide frame, and a motor cover is fixedly provided through the mounting seat.

[0009] Preferably, an annular rack A is connected and fixedly provided on the mounting seat.

[0010] Preferably, an annular rack B is fixedly connected to the rotating ring.

[0011] Preferably, an electric push rod is connected and fixedly arranged on the fixing seat, the other end of the electric push rod is connected and fixedly arranged with the movable air guide frame, and a fixed guide rod is connected and fixedly arranged on the fixing seat.

[0012] Preferably, an air guide cover is fixedly connected to the movable air guide frame, a fan blade is rotatably connected inside the air guide cover, a driven wheel is fixedly connected to one end of the fan blade, and a slide groove is provided on one side of the movable air guide frame.

[0013] Preferably, the transmission mechanism includes a rotating shaft, which is rotatably connected to the movable air guide frame, and a transmission wheel is fixedly connected to one end of the rotating shaft close to the fixed seat, and the transmission wheel is meshingly arranged with the annular rack A for transmission, and a driving wheel is fixedly connected to a position of the rotating shaft close to the air guide cover, and the driving wheel is meshingly arranged with the driven wheel for transmission.

[0014] Preferably, a rotating rod is fixedly connected to the other end of the rotating shaft, a connecting rod is rotatably connected to the other end of the rotating rod, a transmission rack is rotatably connected to the other end of the connecting rod, a slider is fixedly connected to one end of the transmission rack, and the slider is slidably matched with the inner wall of the slide groove.

[0015] Preferably, the grating scale cleaning mechanism includes a rotating tube, which is rotatably connected to the inner wall of the movable air guide frame, one end of the rotating tube is connected and fixedly provided with a transmission rod, the transmission rod is provided with a transmission groove, and the transmission groove is slidingly matched with the fixed guide rod, the other end of the rotating tube is rotatably connected to two jet rods, one end of the jet rod is connected and fixedly provided with a gear, the two gears are meshed with each other for transmission, one of the gears is meshed with a transmission rack for transmission, and the jet rod is connected and fixedly provided with bristles on the side close to the glass circular grating scale.

[0016] Preferably, a sealing cover is movably inserted at the opening on one side of the motor cover, a motor is fixedly connected to the inside of the motor cover, an output end of the motor extends through the inner wall of the motor cover to the outside and is fixedly connected to a transmission shaft, the other end of the transmission shaft is fixedly connected to a driving wheel, the driving wheel is meshed with an annular rack B for transmission, one end of the sealing cover is fixedly connected to a tension spring, and the other end of the tension spring is fixedly connected to the motor cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the glass grating scale is used in a CNC machine tool, the rotating ring can be used to drive the grating scale cleaning mechanism to rotate around the glass grating scale. At the same time, driven by the transmission mechanism, the two jet rods will swing back and forth. The brush can efficiently remove the metal chips on the surface of the grating scale. Through automatic cleaning, the dependence on manual intervention is reduced, the labor intensity of manual cleaning and the possibility of misoperation are reduced, and the damage to the grating scale caused by improper cleaning by the operator is avoided, ensuring that the reading of the grating scale will not be disturbed and the operation stability of the machine tool will not be affected;

[0019] 2. When a fan blade is arranged on the movable air guide frame, the fan blade can be driven to rotate while the transmission mechanism drives the grating scale cleaning mechanism, and the flowing air is sprayed on the glass grating scale through the air jet rod, which can more effectively blow away the small particles attached to the surface of the grating scale, especially those metal chips slightly attached to the surface, further improving the cleaning efficiency;

[0020] 3. By setting up a movable air guide frame, when there is no need to clean the glass grating scale, the movable air guide frame can be driven to move and the grating scale cleaning mechanism can be rotated to one side to avoid obstruction and interference to the grating scale, thereby ensuring that the grating scale can be measured efficiently and stably during the operation of the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a glass grating ruler of the present invention;

[0022] Figure 2 It is a schematic diagram of a partial structure of a glass grating ruler of the present invention when cleaning the glass grating ruler;

[0023] Figure 3 This is a schematic diagram of the structure of a mounting base of a glass grating ruler according to the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of a fixing seat of a glass grating ruler of the present invention;

[0025] Figure 5 A schematic cross-sectional view of a movable air guide frame structure of a glass grating ruler of the present invention;

[0026] Figure 6 This is a schematic diagram of the transmission mechanism structure of a glass grating ruler of the present invention;

[0027] Figure 7 A partial cross-sectional schematic diagram of the structure of a grating ruler cleaning mechanism of a glass grating ruler of the present invention;

[0028] Figure 8 The present invention is a schematic diagram of a cross-sectional expansion of a motor cover structure of a glass grating ruler.

[0029] The following are marked in the figure: 1. CNC machine tool; 2. Mounting seat; 3. Glass circular grating ruler; 4. Rotating ring; 5. Fixed seat; 6. Movable air guide frame; 7. Transmission mechanism; 8. Grating ruler cleaning mechanism; 9. Motor cover; 201. Ring rack A; 401. Ring rack B; 501. Electric push rod; 502. Fixed guide rod; 601. Air guide cover; 602. Fan blade; 603. Driven wheel; 604. Slideway; 701, rotating shaft; 702, transmission wheel; 703, driving wheel; 704, rotating rod; 705, connecting rod; 706, transmission rack; 707, sliding block; 801, rotating tube; 802, transmission rod; 803, transmission groove; 804, jet rod; 805, gear; 806, bristles; 901, sealing cover; 902, motor; 903, driving wheel; 904, tension spring; 905, transmission shaft. DETAILED DESCRIPTION

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0031] like Figure 1-Figure 8 A glass grating ruler shown in the figure comprises a numerical control machine tool 1, a mounting seat 2 is fixedly installed in the numerical control machine tool 1, a glass circular grating ruler 3 is installed on the mounting seat 2, a rotating ring 4 is rotatably connected to the mounting seat 2, a fixed seat 5 is connected and fixed to the rotating ring 4, a movable air guide frame 6 is slidably provided on the fixed seat 5, a transmission mechanism 7 is slidably provided on one side of the movable air guide frame 6, a grating ruler cleaning mechanism 8 is rotatably provided on the movable air guide frame 6, and a motor cover 9 is fixedly provided in the mounting seat 2 through connection. The glass circular grating ruler 3 adopts microcrystalline glass and special photolithography structure.

[0032] like Figure 3 As shown, an annular rack A201 is connected and fixedly arranged on the mounting seat 2. The annular rack A201 realizes the function of driving the transmission mechanism 7.

[0033] like Figure 3 As shown, a ring rack B401 is fixedly connected to the rotating ring 4.

[0034] like Figure 4 As shown, an electric push rod 501 is connected and fixedly arranged on the fixed seat 5, and the other end of the electric push rod 501 is connected and fixedly arranged with the movable air guide frame 6, and a fixed guide rod 502 is connected and fixedly arranged on the fixed seat 5. The electric push rod 501 drives the movable air guide frame 6 to move, and at this time, under the action of the fixed guide rod 502, it will drive the transmission rod 802 with a transmission groove 803 to rotate.

[0035] like Figure 5As shown, an air guide cover 601 is fixedly connected to the movable air guide frame 6, a fan blade 602 is rotatably connected inside the air guide cover 601, a driven wheel 603 is fixedly connected to one end of the fan blade 602, and a slide groove 604 is provided on one side of the movable air guide frame 6. When the fan blade 602 rotates, the fan blade 602 generates flowing air that is injected into the rotating tube 801 through the movable air guide frame 6, and then ejected through two air injection rods 804 and sprayed onto the glass circular grating scale 3.

[0036] like Figure 6 As shown, the transmission mechanism 7 includes a rotating shaft 701, which is rotatably connected to the movable air guide frame 6, a transmission wheel 702 is fixedly connected to one end of the rotating shaft 701 near the fixed seat 5, and the transmission wheel 702 is meshed with the annular rack A201 for transmission, and a driving wheel 703 is fixedly connected to the position of the rotating shaft 701 near the air guide cover 601, and the driving wheel 703 is meshed with the driven wheel 603 for transmission. Under the action of the annular rack A201, the rotating transmission wheel 702 will rotate, so that the transmission wheel 702 drives the connected rotating shaft 701 to rotate, so that the rotating shaft 701 drives the connected driving wheel 703 to rotate, so that the driving wheel 703 drives the driven wheel 603 to rotate.

[0037] The other end of the rotating shaft 701 is connected and fixed with a rotating rod 704, the other end of the rotating rod 704 is rotatably connected with a connecting rod 705, the other end of the connecting rod 705 is rotatably connected with a transmission rack 706, one end of the transmission rack 706 is connected and fixed with a slider 707, and the slider 707 is slidably matched with the inner wall of the slide groove 604. The rotating shaft 701 drives the connected rotating rod 704 to rotate, so that the rotating rod 704 drives the connecting rod 705, and the connecting rod 705 drives the transmission rack 706 to reciprocate.

[0038] like Figure 7 As shown, the grating scale cleaning mechanism 8 includes a rotating tube 801, which is rotatably connected to the inner wall of the movable air guide frame 6, and a transmission rod 802 is fixedly connected to one end of the rotating tube 801, and a transmission groove 803 is provided on the transmission rod 802, and the transmission groove 803 is slidably matched with the fixed guide rod 502. The other end of the rotating tube 801 is rotatably connected to two air jet rods 804, and a gear 805 is fixedly connected to one end of the air jet rod 804. The two gears 805 are meshed and transmitted, and one of the gears 805 is meshed and transmitted with the transmission rack 706. A brush 806 is fixedly connected to the side of the air jet rod 804 close to the glass circular grating scale 3. The transmission groove 803 is arranged in a spiral structure. The transmission rack 706 moves back and forth, thereby driving one of the gears 805 to rotate, and at this time the gear 805 drives the other gear 805 to rotate, so that the two jet rods 804 swing back and forth, and the metal chips attached to the glass circular grating scale 3 are cleaned by the bristles 806.

[0039] like Figure 8 As shown, a sealing cover 901 is movably inserted at the opening on one side of the motor cover 9, a motor 902 is connected and fixedly installed inside the motor cover 9, an output end of the motor 902 extends through the inner wall of the motor cover 9 to the outside and is connected and fixedly installed with a transmission shaft 905, the other end of the transmission shaft 905 is connected and fixedly installed with a driving wheel 903, the driving wheel 903 is meshed with the annular rack B401 for transmission, one end of the sealing cover 901 is connected and fixedly installed with a tension spring 904, and the other end of the tension spring 904 is connected and fixedly installed with the motor cover 9.

[0040] Working principle: When the glass circular grating scale 3 is applied to the CNC machine tool 1, since the glass circular grating scale 3 adopts microcrystalline glass and special photolithography structure, the microcrystalline glass material has a lower thermal expansion coefficient. Compared with ordinary glass, the thermal expansion coefficient of microcrystalline glass is usually smaller, and its temperature stability can be further optimized through material design and processing. This means that when the temperature changes, the size of the glass changes very little, thereby ensuring that the optical radius of the glass circular grating scale 3 does not change with the temperature change. Due to the stability of the microcrystalline glass, the change in the grating structure is very small, and the change in the light propagation path and the interference fringes is kept within a very small range. Therefore, the system can stably track and measure the displacement, ensuring high-precision measurement results, thereby providing a stable spatial coordinate system for the CNC machine tool 1 to process.

[0041] When the CNC machine tool 1 is processing, metal chips will splash and fall on the glass circular grating ruler 3. At this time, it is necessary to clean it. The electric push rod 501 is used to drive the movable air guide frame 6 to move. At this time, under the action of the fixed guide rod 502, the transmission rod 802 with a transmission groove 803 is driven to rotate, so that the transmission rod 802 drives the connected rotating tube 801 to rotate, so that the air injection rod 804 can rotate to the side of the glass circular grating ruler 3;

[0042] Then, the motor 902 is used to drive the transmission shaft 905 to rotate, so that the transmission shaft 905 drives the connected driving wheel 903 to rotate, so that the driving wheel 903 drives the rotating ring 4 connected to the annular rack B401 to rotate, thereby driving the jet rod 804 to rotate around the glass circular grating ruler 3;

[0043] At the same time, under the action of the annular rack A201, the rotating transmission wheel 702 will rotate, so that the transmission wheel 702 drives the connected rotating shaft 701 to rotate, so that the rotating shaft 701 drives the connected driving wheel 703 to rotate, so that the driving wheel 703 drives the driven wheel 603 to rotate, and then the driven wheel 603 drives the connected fan blade 602 to rotate, and the fan blade 602 generates flowing air, which is injected into the rotating tube 801 through the movable air guide frame 6, and then sprayed out through the two air injection rods 804 and sprayed on the glass circular grating ruler 3;

[0044] At the same time, the rotating shaft 701 will drive the connected rotating rod 704 to rotate, so that the rotating rod 704 drives the connecting rod 705, and the connecting rod 705 drives the transmission rack 706 to move back and forth, thereby driving one of the gears 805 to rotate. At this time, the gear 805 will drive another gear 805 to rotate, so that the two jet rods 804 will swing back and forth, and the metal chips attached to the glass circular grating ruler 3 are cleaned by the bristles 806. The reciprocating swinging jet rod 804 is conducive to pushing the metal chips away from the glass circular grating ruler 3. When the motor 902 needs to be inspected, the motor 902 in the motor cover 9 can be inspected by pulling up the sealing cover 901. After the inspection is completed, the tension spring 904 will drive the sealing cover 901 to automatically reset, thereby protecting the motor 902 in the motor cover 9.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A glass grating ruler, comprising a numerically controlled machine tool (1), characterized in that: A mounting seat (2) is fixedly installed in the CNC machine tool (1), a glass circular grating scale (3) is installed on the mounting seat (2), a rotating ring (4) is rotatably connected to the mounting seat (2), a fixed seat (5) is connected and fixed to the rotating ring (4), a movable air guide frame (6) is slidably provided on the fixed seat (5), a transmission mechanism (7) is slidably provided on one side of the movable air guide frame (6), a grating scale cleaning mechanism (8) is rotatably connected to the movable air guide frame (6), and a motor cover (9) is fixedly provided in the mounting seat (2).

2. A glass grating ruler according to claim 1, characterized in that: An annular rack A (201) is connected and fixedly arranged on the mounting seat (2).

3. The glass grating ruler according to claim 1, characterized in that: An annular rack B (401) is fixedly connected to the rotating ring (4).

4. The glass grating ruler according to claim 1, characterized in that: An electric push rod (501) is connected and fixedly arranged on the fixed seat (5), and the other end of the electric push rod (501) is connected and fixedly arranged on the movable air guide frame (6). A fixed guide rod (502) is connected and fixedly arranged on the fixed seat (5).

5. The glass grating ruler according to claim 1, characterized in that: An air guide cover (601) is fixedly connected to the movable air guide frame (6), a fan blade (602) is rotatably connected to the inside of the air guide cover (601), a driven wheel (603) is fixedly connected to one end of the fan blade (602), and a sliding groove (604) is provided on one side of the movable air guide frame (6).

6. The glass grating ruler according to claim 1, characterized in that: The transmission mechanism (7) comprises a rotating shaft (701), the rotating shaft (701) is rotatably connected to the movable air guide frame (6), a transmission wheel (702) is fixedly connected to one end of the rotating shaft (701) close to the fixed seat (5), the transmission wheel (702) is meshed with the annular rack A (201) for transmission, and a driving wheel (703) is fixedly connected to the position of the rotating shaft (701) close to the air guide cover (601), and the driving wheel (703) is meshed with the driven wheel (603) for transmission.

7. A glass grating ruler according to claim 6, characterized in that: The other end of the rotating shaft (701) is connected and fixedly provided with a rotating rod (704), the other end of the rotating rod (704) is rotatably connected with a connecting rod (705), the other end of the connecting rod (705) is rotatably connected with a transmission rack (706), one end of the transmission rack (706) is connected and fixedly provided with a sliding block (707), and the sliding block (707) is slidably matched with the inner wall of the sliding groove (604).

8. The glass grating ruler according to claim 1, characterized in that: The grating scale cleaning mechanism (8) comprises a rotating tube (801), the rotating tube (801) is rotatably connected to the inner wall of the movable air guide frame (6), one end of the rotating tube (801) is connected and fixedly provided with a transmission rod (802), the transmission rod (802) is provided with a transmission groove (803), the transmission groove (803) and the fixed guide rod (502) are slidably matched, the other end of the rotating tube (801) is rotatably connected to two air injection rods (804), one end of the air injection rod (804) is connected and fixedly provided with a gear (805), the two gears (805) are meshed with each other for transmission, one of the gears (805) is meshed with a transmission rack (706) for transmission, and a brush (806) is connected and fixedly provided on the side of the air injection rod (804) close to the glass circular grating scale (3).

9. The glass grating ruler according to claim 1, characterized in that: A sealing cover (901) is movably inserted at an opening on one side of the motor cover (9); a motor (902) is fixedly connected to the inside of the motor cover (9); an output end of the motor (902) passes through the inner wall of the motor cover (9) and extends to the outside and is fixedly connected to a transmission shaft (905); a driving wheel (903) is fixedly connected to the other end of the transmission shaft (905); the driving wheel (903) is meshed with an annular rack B (401) for transmission; a tension spring (904) is fixedly connected to one end of the sealing cover (901); and the other end of the tension spring (904) is fixedly connected to the motor cover (9).

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