Grating ruler reading head

Abstract

The utility model relates to the technical field of grating rulers, in particular to a grating ruler reading head. Comprising a pulley, a reading head body, a mounting plate, two sliding blocks and a plurality of groups of rotary connecting assemblies, a plurality of mounting gaps are formed in the side part of the pulley; each rotating connecting assembly comprises a sleeve, a movable rod and a rotating base. The two sliding blocks are respectively mounted at the bottom ends of the pulleys; the reading head body is installed on the pulley. According to the technical scheme, the tackle is flexibly connected with the mechanical transmission part, so that the influence of shaking of the mechanical transmission part on the mounting stability of the tackle can be reduced.

Description

Technical Field

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

[0002] The grating ruler is a measurement feedback device that works based on the optical principle of the grating. It is widely used in the closed-loop servo system of CNC machine tools. As a position detection element for the linear axis, it plays a role in compensating for the motion error of the linear axis. At this time, ensuring the accuracy and reliability of the grating scale number has a vital impact on the quality of the final product.

[0003] The grating ruler reading head is connected to the mechanical transmission part through a hard connection. In this way, the swing caused by the mechanical transmission part such as the machine base, the deformation of the screw rod, the poor straightness of the guide rail, etc. is all transmitted to the reading head, causing the reading head to be unstable when moving and easily affecting the stability of the pulley installation. Utility Model Content

[0004] The utility model aims to provide a grating ruler reading head in view of the problems existing in the background technology.

[0005] The technical solution of the utility model is a grating ruler reading head, comprising:

[0006] A pulley, wherein a plurality of mounting notches are provided on the side of the pulley;

[0007] A mounting plate and a plurality of rotating connection components, wherein the plurality of rotating connection components are arranged one by one in correspondence with the plurality of mounting notches, each rotating connection component comprises a sleeve, a movable rod and a rotating seat, wherein the end of the movable rod is slidably mounted on the inner side of the sleeve, and the other end of the movable rod is rotatably mounted in the mounting notch on the corresponding side, the rotating seat is mounted on the mounting plate, and the other end of the sleeve is rotatably connected to the rotating seat;

[0008] Two sliding blocks, the two sliding blocks are respectively installed at the bottom ends of the pulley;

[0009] The reading head body is installed on the pulley.

[0010] Preferably, the cross section of the sliding block is an inverted T-shaped structure.

[0011] Preferably, a plurality of mounting grooves are arranged side by side on the sliding block, the mounting grooves surround the outer side of the sliding block, a plurality of balls are arranged at each of the plurality of mounting grooves, the protruding points of the balls protrude to the outer side of the mounting grooves, and the balls are rollingly mounted on the sliding block.

[0012] Preferably, a through hole is provided at the upper end of the sliding block, a leakage hole connected to the inner side of the through hole is provided at the upper ends of the plurality of mounting grooves, and two oil dripping pipes connected to the through holes on both sides are provided on the pulley.

[0013] Preferably, at least two ball bearings are disposed at the bottom end of the mounting groove, at least one ball bearing is disposed on both sides of the bottom structure of the mounting groove, and at least one ball bearing is disposed on the upper end of the bottom structure of the sliding block.

[0014] Preferably, the number of balls at the bottom of the mounting groove is four.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects: the mounting plate is softly connected to the mechanical transmission part, and when the swing of the mechanical transmission part caused by reasons such as deformation of the machine base and screw rod, poor straightness of the guide rail, etc. is all transmitted to the mounting plate, the reading head body is then transmitted to the pulley through the rotating connecting assembly, so that the mounting plate will not affect the pulley during the swinging process, thereby improving the stability of the pulley installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 All of them are structural schematic diagrams of the present utility model.

[0017] Figure 3 It is a structural schematic diagram of the sliding block in the utility model.

[0018] Figure numerals: 1, pulley; 101, mounting notch; 2, reading head body; 3, sliding block; 301, mounting groove; 302, through hole; 303, leakage hole; 4, ball; 51, sleeve; 52, movable rod; 6, mounting plate; 7, rotating seat; 8, oil drip tube. DETAILED DESCRIPTION

[0019] Embodiment 1

[0020] like Figure 1-Figure 2 As shown, a grating ruler reading head proposed in this embodiment includes a pulley 1, a reading head body 2, a mounting plate 6, two sliding blocks 3 and multiple groups of rotating connection components; a plurality of mounting notches 101 are opened on the side of the pulley 1; the multiple groups of rotating connection components are arranged in a one-to-one correspondence with the multiple mounting notches 101, and each group of rotating connection components includes a sleeve 51, a movable rod 52 and a rotating seat 7, the end of the movable rod 52 is slidably mounted on the inner side of the sleeve 51, and the other end of the movable rod 52 is rotatably mounted in the mounting notch 101 on the corresponding side, the rotating seat 7 is mounted on the mounting plate 6, and the other end of the sleeve 51 is rotatably connected to the rotating seat 7; the two sliding blocks 3 are respectively mounted on the bottom ends of the pulley 1, and the cross-section of the sliding block 3 is an inverted T-shaped structure; the reading head body 2 is mounted on the pulley 1.

[0021] In this embodiment, the mounting plate 6 is softly connected to the mechanical transmission part. When the swing of the mechanical transmission part caused by reasons such as deformation of the machine base and the screw rod and poor straightness of the guide rail is all transmitted to the mounting plate 6, the reading head body 2 is then transmitted to the pulley 1 through the rotating connection assembly, so that the mounting plate 6 will not affect the pulley 1 during the swinging process, thereby improving the stability of the installation of the pulley 1.

[0022] Embodiment 2

[0023] like Figure 1 and Figure 3 As shown, a grating ruler reading head is proposed in this embodiment. Compared with the first embodiment, in this embodiment, a plurality of mounting grooves 301 are arranged side by side on the sliding block 3, and the mounting grooves 301 surround the outer side of the sliding block 3. A plurality of balls 4 are arranged at the plurality of mounting grooves 301, and at least two balls 4 are arranged at the bottom end of the mounting grooves 301. Specifically, the number of balls 4 at the bottom end of the mounting grooves 301 is four, and at least one ball 4 is arranged on both sides of the bottom structure of the mounting grooves 301, and at least one ball is arranged on the upper end of the bottom structure of the sliding block 3, and the protruding point of the ball 4 protrudes to the outside of the mounting groove 301, and the ball 4 is rollingly installed on the sliding block 3. The friction generated by the sliding block 3 during the sliding process can be reduced by installing a plurality of balls 4.

[0024] A through hole 302 is provided at the upper end of the sliding block 3, and a leakage hole 303 connected to the inner side of the through hole 302 is provided at the upper ends of the plurality of mounting grooves 301. Two oil dripping tubes 8 connected to the through holes 302 on both sides are provided on the pulley 1; the lubricating oil enters the inner side of the through hole 302 through the oil dripping tube 8, and then flows into the inner side of the plurality of mounting grooves 301 through the leakage hole 303, thereby achieving lubrication of the plurality of ball bearings 4, making full use of the lubricating oil and reducing the waste of the lubricating oil.

[0025] 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 grating ruler reading head, characterized in that: include: A pulley (1), wherein a plurality of mounting notches (101) are provided on the side of the pulley (1); A mounting plate (6) and a plurality of rotating connection components, wherein the plurality of rotating connection components are arranged in one-to-one correspondence with the plurality of mounting notches (101), each rotating connection component comprising a sleeve (51), a movable rod (52) and a rotating seat (7), wherein the end of the movable rod (52) is slidably mounted on the inner side of the sleeve (51), and the other end of the movable rod (52) is rotatably mounted in the mounting notch (101) on the corresponding side, the rotating seat (7) is mounted on the mounting plate (6), and the other end of the sleeve (51) is rotatably connected to the rotating seat (7); Two sliding blocks (3), the two sliding blocks (3) are respectively installed at the bottom ends of the pulley (1); The reading head body (2) is mounted on the pulley (1).

2. A grating ruler reading head according to claim 1, characterized in that: The cross section of the sliding block (3) is an inverted T-shaped structure.

3. A grating ruler reading head according to claim 2, characterized in that: The sliding block (3) is provided with a plurality of mounting grooves (301) arranged side by side, the mounting grooves (301) surround the outer side of the sliding block (3), a plurality of balls (4) are arranged at each of the plurality of mounting grooves (301), the protruding points of the balls (4) protrude to the outer side of the mounting grooves (301), and the balls (4) are rollingly mounted on the sliding block (3).

4. A grating ruler reading head according to claim 3, characterized in that: A through hole (302) is provided at the upper end of the sliding block (3), a plurality of mounting grooves (301) are provided at their upper ends with leakage holes (303) connected to the inner side of the through hole (302), and the pulley (1) is provided with two oil dripping pipes (8) respectively connected to the through holes (302) on both sides.

5. The grating ruler reading head according to claim 3, characterized in that: At least two balls (4) are arranged at the bottom end of the installation groove (301), at least one ball (4) is arranged on both sides of the bottom structure of the installation groove (301), and at least one ball (4) is arranged at the upper end of the bottom structure of the sliding block (3).

6. A grating ruler reading head according to claim 4, characterized in that: The number of the bottom balls (4) of the mounting groove (301) is four.

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