Double-code-channel grating ruler

Abstract

The utility model relates to the technical field of grating rulers, in particular to a double-code-channel grating ruler, which comprises a ruler shell, a mounting plate and a cleaning mechanism. A grating ruler A and a grating ruler B are arranged in the ruler shell in parallel in the radial direction of a channel of the ruler shell, a sliding groove communicated with the internal channel of the ruler shell is formed in the ruler shell, and two sealing strips are symmetrically arranged in the sliding groove. The mounting plate is connected with a sliding block, the sliding block is located in the sliding groove and slidably connected with the inner wall of the sliding groove, and the sliding block is provided with a measuring assembly A and a measuring assembly B corresponding to the grating ruler A and the grating ruler B. The two cleaning mechanisms are connected with the mounting plate and are symmetrical about the axis, perpendicular to the ruler shell, of the mounting plate, and the cleaning mechanisms clean dirt located on the surface of the sealing strip in the advancing direction of the mounting plate in the moving state of the mounting plate. According to the utility model, the sealing strip in the sliding advancing direction of the reading head can be effectively decontaminated, dirt is prevented from entering the ruler shell to pollute the grating ruler, and the cleaning structure does not need to consume electric energy.

Description

Technical Field

[0001] The utility model relates to the technical field of grating rulers, in particular to a double-track grating ruler. Background Art

[0002] Grating ruler, also known as grating ruler displacement sensor (grating ruler sensor), is a measurement feedback device that works based on the optical principle of grating. Grating ruler is often used in the closed-loop servo system of CNC machine tools and can be used to detect linear displacement or angular displacement.

[0003] The technical solution disclosed in the Chinese patent with the authorization announcement number CN207622696U is injection molded by precision molds, and has the advantages of light weight, good dimensional stability, good oil resistance, and excellent impact strength. Moreover, it does not require subsequent processing and can be directly installed inside the ruler body, saving production costs.

[0004] However, the device still has some shortcomings: due to the lack of a cleaning structure for the sealing strip, dust, cutting fluid or debris attached to the sealing strip enters the inside of the scale body after the sealing strip is opened, causing frequent contamination of the grating scale, thereby reducing the accuracy of the grating scale. Utility Model Content

[0005] The utility model aims to provide a double-track grating ruler in view of the problems existing in the background technology.

[0006] The technical solution of the utility model is: a double-track grating ruler, comprising a ruler shell, in which a grating ruler A and a grating ruler B are arranged in parallel along the radial direction of the channel, a slide groove connected to the internal channel of the ruler shell is arranged on the ruler shell, and two sealing strips are symmetrically arranged in the slide groove.

[0007] The mounting plate is connected to the slider, the slider is located in the slide groove and is slidably connected to the inner wall thereof, and the slider is provided with a measuring component A and a measuring component B corresponding to the grating scale A and the grating scale B respectively.

[0008] And a cleaning mechanism, two groups of cleaning mechanisms are connected to the mounting plate and are symmetrical about the axis of the mounting plate perpendicular to the ruler housing, and the cleaning mechanisms clean the dirt on the surface of the sealing strip in the forward direction of the mounting plate when the mounting plate moves.

[0009] Preferably, a guide head is arranged on one side of the mounting plate close to the ruler housing, wedges are arranged at both ends of the guide head, the guide head is in sliding contact with the sealing strip, and a slider is connected to the side of the guide head away from the mounting plate.

[0010] Preferably, the measuring component A comprises a light source transmitter A and a light receiver A, and the light source transmitter A and the light receiver A are respectively located on two sides of the grating ruler A.

[0011] Preferably, the measuring component B comprises a light source transmitter B and a light receiver B, and the light source transmitter B and the light receiver B are respectively located on two sides of the grating ruler B.

[0012] Preferably, the cleaning mechanism includes a rotating shaft and a driving assembly. Two through holes A are symmetrically arranged on one side of the mounting plate facing the ruler housing, the rotating shaft is located in the through hole A and is rotatably connected to the mounting plate, and a brush is coaxially arranged on the rotating shaft, the brush is in flexible contact with the inner wall of the through hole A and the sealing strip, and the driving assembly is connected to the mounting plate and drives the rotating shaft to rotate.

[0013] Preferably, the driving assembly includes a gear A and a rack. The top end of the rotating shaft is coaxially connected to the ratchet, and the gear A is sleeved on the outside of the ratchet and rotatably connected thereto. The gear A is provided with ratchet teeth for limiting the one-way transmission between the gear A and the ratchet, and the ratchet and the ratchet teeth corresponding to the side rotating shaft are symmetrical. The rack is connected to the ruler housing, and the gears B on both sides are meshed and connected to the rack.

[0014] Preferably, a through hole B communicating with the through holes A on both sides is respectively provided at the bottom of the through holes A on the mounting plate, the bottom of the rotating shaft is connected to the impeller, and the impeller is located in the through hole B.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] A rotating shaft is provided with a brush on the rotating shaft, and the rotating shaft is connected to the rack through gear A and gear B. When the mounting plate slides, gear B rolls along the rack, thereby driving gear A and the rotating shaft to rotate, and the sealing strip in front of the moving direction of the mounting plate is cleaned by the rotating brush; an impeller is provided at the bottom of the rotating shaft, and the impeller rotates with the rotating shaft, thereby driving the air and the cleaned dirt to be discharged along the output direction of the impeller, and a ratchet and ratchet gear structure is provided so that the rotating shaft rotates in only one direction, thereby fixing the rotation direction of the impeller to prevent reverse airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 Schematic diagram of the internal structure of the ruler shell;

[0019] Figure 3 It is a schematic diagram of the connection structure of various components on the mounting plate;

[0020] Figure 4 It is a schematic diagram of the connection structure between the rotating shaft and gear B.

[0021] Figure numerals: 1, ruler housing; 101, slide groove; 2, grating ruler A; 3, grating ruler B; 4, sealing strip; 5, mounting plate; 501, through hole A; 502, through hole B; 51, guide head; 52, slider; 6, measuring component A; 7, measuring component B; 8, rotating shaft; 9, brush; 10, impeller; 11, ratchet; 12, gear A; 13, ratchet; 14, gear B; 15, rack. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] like Figure 1-Figure 4 As shown, a dual-channel grating ruler proposed by the utility model comprises a ruler housing 1, a mounting plate 5 and a cleaning mechanism. A grating ruler A2 and a grating ruler B3 are arranged in parallel along the radial direction of the channel in the ruler housing 1, a plurality of grooves A perpendicular to the radial direction of the grating ruler A2 are arranged on the grating ruler A2, a plurality of grooves B inclined to the grating ruler B3 are arranged on the grating ruler B3, and the inclination angles of two adjacent grooves B are different. A slide groove 101 connected to the internal channel thereof is arranged on the ruler housing 1, and two sealing strips 4 are symmetrically arranged in the slide groove 101. A guide head 51 is arranged on the side of the mounting plate 5 close to the ruler housing 1, and wedges are arranged at both ends of the guide head 51. The guide head 51 is in sliding contact with the sealing strip 4, and a slider 52 is connected to the side of the guide head 51 away from the mounting plate 5. The slider 52 is located in the slide groove 101 and is slidably connected to the inner wall thereof, and a measuring component A6 and a measuring component B7 corresponding to the grating ruler A2 and the grating ruler B3 are arranged on the slider 52. The measuring component A includes a light source transmitter A and a light receiver A, and the light source transmitter A and the light receiver A are respectively located on both sides of the grating scale A2. The measuring component B includes a light source transmitter B and a light receiver B, and the light source transmitter B and the light receiver B are respectively located on both sides of the grating scale B3. Both sets of cleaning mechanisms are connected to the mounting plate 5 and are symmetrical about the axis of the mounting plate 5 perpendicular to the scale housing 1. The cleaning mechanism includes a rotating shaft 8 and a driving component. Two through holes A501 are symmetrically arranged on one side of the mounting plate 5 facing the scale housing 1. The rotating shaft 8 is located in the through hole A501 and is rotatably connected to the mounting plate 5. A brush 9 is coaxially arranged on the rotating shaft 8. The brush 9 is in flexible contact with the inner wall of the through hole A501 and the sealing strip 4. The driving component is connected to the mounting plate 5 and drives the rotating shaft 8 to rotate. The driving component includes a gear A12 and a rack 15. The top of the rotating shaft 8 is coaxially connected to the ratchet 11, and the gear A12 is sleeved on the outside of the ratchet 11 and is rotatably connected thereto. The gear A12 is provided with a ratchet 13 for limiting the one-way transmission between it and the ratchet 11, and the ratchet 11 and the ratchet 13 corresponding to the side rotating shaft 8 are symmetrical. The rack 15 is connected to the ruler housing 1, and the gears B14 on both sides are meshed and connected with the rack 15, and the outer diameter of the gear B14 is larger than the outer diameter of the gear A12. When the mounting plate 5 moves, the cleaning mechanism cleans the dirt on the surface of the sealing strip 4 in the forward direction thereof.

[0024] In this embodiment, when the mounting plate 5 slides, the gear B14 at the front end of the mounting plate 5 in the forward direction rolls along the rack 15 to make it rotate itself. The rotation of the gear B14 drives the gear A12 to rotate. Since the ratchet 13 on the side gear A12 is in meshing state with the ratchet 11, the ratchet 11 is driven by the gear A12 to rotate, thereby driving the rotating shaft 8 on this side to rotate. The rotating shaft 8 drives the brush 9 to rotate and cleans the sealing strip 4 in front of the mounting plate 5 in the forward direction, and pushes the dust on the surface of the sealing strip 4 that has not been opened by the guide head 5 to be brushed off in the forward direction of the mounting plate 5. Since the ratchet 11 and the ratchet 13 are in elastic contact with the rotating shaft at the rear of the mounting plate 5 in the forward direction, the rotating shaft 8 on this side does not rotate, and the rotating shaft 8 rotates when the mounting plate 5 slides in the reverse direction, thereby effectively utilizing the structure to brush off the dust on the surface of the sealing strip 4 in the forward direction when the mounting plate 5 slides, thereby preventing dust and other dirt from entering the ruler housing 1 during the opening process of the sealing strip 4, thereby preventing dirt from contaminating the grating ruler.

[0025] Embodiment 2

[0026] like Figure 3 and Figure 4 As shown, the utility model proposes a dual-track grating ruler. Compared with the first embodiment, a through hole B502 connected to the through hole A501 on both sides is respectively arranged at the bottom of the mounting plate 5, and the bottom of the rotating shaft 8 is connected to the impeller 10, and the impeller 10 is located in the through hole B502. The impeller 10 pushes the air in the through hole A501 and the through hole B502 to the outside of the mounting plate 5 when rotating.

[0027] In this embodiment, when the rotating shaft 8 rotates, it drives the impeller 10 to rotate. The high-speed rotating impeller 10 drives the air flow in the through hole, so that the dirt brushed off by the brush 9 enters the through hole B502 along the opening of the through hole A501 under the drive of the airflow and is discharged from the mounting plate 5 under the push of the impeller 10. This structure has a clear guiding effect on the brushed dirt, preventing the brushed dirt from adhering to the sealing strip 4 again.

[0028] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A dual-track grating ruler, characterized in that: include A ruler housing (1), wherein a grating ruler A (2) and a grating ruler B (3) are arranged in parallel along the radial direction of a channel of the ruler housing (1), a slide groove (101) communicating with the internal channel of the ruler housing (1) is arranged on the ruler housing (1), and two sealing strips (4) are symmetrically arranged in the slide groove (101); A mounting plate (5), the mounting plate (5) being connected to a slider (52), the slider (52) being located in the slide groove (101) and being slidably connected to the inner wall thereof, and the slider (52) being provided with a measuring component A (6) and a measuring component B (7) corresponding to the grating ruler A (2) and the grating ruler B (3) respectively; and a cleaning mechanism, wherein the two groups of cleaning mechanisms are connected to the mounting plate (5) and are symmetrical about the mounting plate (5) and perpendicular to the axis of the ruler housing (1); when the mounting plate (5) moves, the cleaning mechanisms clean dirt on the surface of the sealing strip (4) in the direction of its advance.

2. A dual-track grating ruler according to claim 1, characterized in that: A guide head (51) is arranged on one side of the mounting plate (5) close to the ruler housing (1), wedges are arranged at both ends of the guide head (51), the guide head (51) is in sliding contact with the sealing strip (4), and a sliding block (52) is connected to the side of the guide head (51) away from the mounting plate (5).

3. A dual-track grating ruler according to claim 1, characterized in that: The measuring component A comprises a light source transmitter A and a light receiver A, wherein the light source transmitter A and the light receiver A are respectively located on two sides of the grating ruler A (2).

4. A dual-track grating ruler according to claim 1, characterized in that: The measuring component B comprises a light source transmitter B and a light receiver B, wherein the light source transmitter B and the light receiver B are respectively located on two sides of the grating ruler B (3).

5. A dual-track grating ruler according to claim 1, characterized in that: The cleaning mechanism comprises a rotating shaft (8) and a driving assembly; two through holes A (501) are symmetrically arranged on one side of the mounting plate (5) facing the ruler housing (1); the rotating shaft (8) is located in the through hole A (501) and is rotatably connected to the mounting plate (5); a brush (9) is coaxially arranged on the rotating shaft (8); the brush (9) is in flexible contact with the inner wall of the through hole A (501) and the sealing strip (4); and the driving assembly is connected to the mounting plate (5) and drives the rotating shaft (8) to rotate.

6. A dual-track grating ruler according to claim 5, characterized in that: The driving assembly comprises a gear A (12) and a rack (15); the top end of the rotating shaft (8) is coaxially connected to the ratchet (11); the gear A (12) is sleeved outside the ratchet (11) and is rotatably connected thereto; the gear A (12) is provided with a ratchet tooth (13) for limiting the one-way transmission between the gear A (12) and the ratchet (11), and the ratchet (11) and the ratchet tooth (13) corresponding to the side rotating shaft (8) are symmetrical; the rack (15) is connected to the ruler housing (1), and the gears B (14) on both sides are meshed and connected to the rack (15).

7. A dual-track grating ruler according to claim 5, characterized in that: A through hole B (502) communicating with the through hole A (501) is respectively arranged at the bottom of the through hole A (501) on both sides of the mounting plate (5), and the bottom of the rotating shaft (8) is connected to the impeller (10), and the impeller (10) is located in the through hole B (502).

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