Repeated positioning high-precision grating ruler structure

Abstract

The invention discloses a repeated positioning high-precision grating ruler structure, and belongs to the technical field of grating ruler measurement, and the structure comprises a profile device, a limiting groove is formed in the profile device, a dustproof strip is arranged in the profile device, a steel belt is arranged in the profile device, and grating glass is fixedly connected to the bottom of the profile device. A section bar device is arranged in the trolley, a reading head is movably connected in the section bar device, a body is arranged at the bottom of the reading head, and a magnet is arranged on one side of the body, according to the magnetic force principle of the magnet, steel belts are arranged on the plane and the side face of the section bar device, and the magnets are arranged on the plane and the side face of the trolley; in the moving process, a magnet of the trolley and a steel belt of the profile device are in magnetic adsorption cutting, the two faces do not rub, it is guaranteed that the trolley stably moves on the grating glass in the moving process, and the situation that the trolley is affected by external force, and consequently the precision error is large is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of grating ruler measurement, and in particular relates to a high-precision grating ruler structure for repeated positioning. Background Art

[0002] The grating ruler is a high-precision position measurement device based on optical principles. It can achieve nanometer-level or even higher precision positioning measurement through the combination of grating stripes and reading head.

[0003] Traditional mechanical or electrical measurement methods have low efficiency in measuring the accuracy and resolution of grating scales and cannot meet the requirements of precision machining and testing, resulting in poor stability and accuracy of grating scales. Summary of the invention

[0004] The object of the present invention is to provide a high-precision grating scale structure for repeated positioning to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision grating ruler structure with repeated positioning, comprising a profile device, a limit groove is arranged inside the profile device, a dust strip is arranged inside the profile device, a steel belt is arranged inside the profile device, a grating glass is fixedly connected to the bottom of the profile device, a reading head is movably connected inside the profile device, a body is arranged at the bottom of the reading head, a magnet is arranged on one side of the body, a ball is movably connected to one side of the magnet, a pulley is arranged on one side of the ball, a bearing is fixedly connected to one side of the pulley, a secondary ruler is arranged inside the pulley, and a limit magnet is arranged inside the profile device;

[0006] As a further preferred embodiment of the technical solution: two limiting magnets are installed inside the profile device, one on the left and one on the right;

[0007] As a further preferred embodiment of the technical solution: a selectable zero position magnet is provided inside the profile device;

[0008] As a further preferred embodiment of the technical solution: the dust-proof strips are provided in two groups, and each group of the dust-proof strips is distributed on both sides of the profile device;

[0009] As a further preferred embodiment of the technical solution: the steel strips are provided in two groups, and the two groups of steel strips are distributed at ninety degrees;

[0010] As a further preferred embodiment of the technical solution: the bearings are provided in five groups, two groups of the bearings are moved on the side of the grating glass, and three groups of the bearings are moved on the front of the grating glass;

[0011] As a further preferred embodiment of the present technical solution: the magnets are distributed on the bottom and side surfaces of the pulley and are placed at 90 degrees.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. In the present invention, through the principle of magnet force, steel belts are arranged on the plane and sides of the profile device, and magnets are arranged on the plane and sides of the trolley. During the movement, the trolley magnet and the steel belt of the profile device present a magnetic adsorption cut and the two surfaces do not rub against each other. During the movement, the trolley is ensured to move smoothly on the grating glass to prevent the influence of external force, which leads to large accuracy error.

[0014] 2. In the present invention, any position of the ball is the origin. A magnet is provided on one side of the main body, a magnet is provided on one side of the trolley, and a ball is provided between the two magnets. The principle that any position of the ball is the origin ensures high reciprocating repeated positioning accuracy during high-speed movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a high-precision grating ruler structure for repeated positioning according to the present invention Figure 1 ;

[0016] Figure 2 A schematic diagram of a high-precision grating ruler structure for repeated positioning according to the present invention Figure 2 ;

[0017] Figure 3 A schematic diagram of a high-precision grating ruler structure for repeated positioning according to the present invention Figure 3 .

[0018] Legend: 1. Profile device; 2. Limit groove; 3. Dustproof strip; 4. Steel belt; 5. Grating glass; 6. Reading head; 7. Main body; 8. Magnet; 9. Ball; 10. Pulley; 11. Bearing; 12. Secondary scale; 13. Limit magnet; 14. Optional zero magnet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example

[0021] See also Figure 1-Figure 3As shown, the present invention provides a technical solution: a high-precision grating ruler structure for repeated positioning, comprising a profile device 1, a limited position groove 2 is arranged inside the profile device 1, a dustproof strip 3 is arranged inside the profile device 1, a steel belt 4 is arranged inside the profile device 1, a grating glass 5 is fixedly connected to the bottom of the profile device 1, a reading head 6 is movably connected inside the profile device 1, a body 7 is arranged at the bottom of the reading head 6, a magnet 8 is arranged on one side of the body 7, a ball 9 is movably connected to one side of the magnet 8, a pulley 10 is arranged on one side of the ball 9, a bearing 11 is fixedly connected to one side of the pulley 10, a secondary ruler 12 is arranged inside the pulley 10, and a limited position magnet is arranged inside the profile device 1 Iron 13, through the magnetic principle of magnet 8, steel belt 4 is arranged on the plane and side of profile device 1, magnet 8 is arranged on the plane and side of trolley, during the movement, magnet 8 of trolley and steel belt 4 of profile device 1 present a magnetic adsorption cut and the two surfaces do not rub, during the movement, the trolley is ensured to move smoothly on grating glass 5, to prevent the influence of external force, resulting in large precision error, any position of ball 9 is the origin, magnet 8 is arranged on one side of body 7, magnet 8 is arranged on one side of trolley, ball 9 is arranged between two magnets 8, any position of ball 9 is the origin, the principle of any position of ball 9 is the origin ensures high reciprocating repeated positioning accuracy during high-speed movement;

[0022] In this embodiment, specifically: two limiting magnets 13 are installed on the left and right inside the profile device 1;

[0023] In this embodiment, specifically: a selectable zero position magnet 14 is provided inside the profile device 1;

[0024] In this embodiment, specifically: two groups of dustproof strips 3 are provided, and each group of dustproof strips 3 is distributed on both sides of the profile device 1;

[0025] In this embodiment, specifically: there are two groups of steel belts 4, and the two groups of steel belts 4 are distributed at 90 degrees;

[0026] In this embodiment, specifically: five groups of bearings 11 are provided, two groups of bearings 11 move on the side of the grating glass 5, and three groups of bearings 11 move on the front of the grating glass 5;

[0027] In this embodiment, specifically: the magnets 8 are distributed on the bottom and side surfaces of the pulley 10 and are placed at 90 degrees.

[0028] Working principle or structural principle: When in use, the plane and side of the profile device 1 are respectively provided with a steel belt 4, and the plane and side of the pulley 10 are provided with a magnet 8. When the pulley 10 moves in the profile device 1, magnetic attraction is generated between the magnet 8 and the steel belt 4, so that the pulley 10 can move smoothly on the grating glass 5, ensuring that the pulley 10 will not be affected by external forces during the movement, thereby avoiding the increase of the precision error, and the reading head 6 determines the position of the pulley 10 by detecting the scale information on the grating glass 5 Due to the smooth movement and magnetic adsorption of the pulley 10, the reading head 6 can accurately read the position information. In addition, the pulley 10 is connected to the body 7 through the magnet 8 and the ball 9. The principle of "any position of the ball is the origin" is used to ensure that the pulley 10 can maintain high repeatability during high-speed movement. At the same time, a limiting magnet 13 is arranged inside the profile device 1 to limit the moving range of the pulley 10. At the same time, an optional zero position magnet 14 is also arranged inside the profile device 1 to set the initial position of the pulley 10.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision grating ruler structure for repeated positioning, comprising a profile device (1), characterized in that: The profile device (1) is provided with a limit groove (2) inside, the profile device (1) is provided with a dustproof strip (3) inside, the profile device (1) is provided with a steel belt (4) inside, the profile device (1) is fixedly connected to a grating glass (5) at the bottom, the profile device (1) is movably connected to a reading head (6) inside, a body (7) is provided at the bottom of the reading head (6), a magnet (8) is provided on one side of the body (7), a ball (9) is movably connected to one side of the magnet (8), a pulley (10) is provided on one side of the ball (9), a bearing (11) is fixedly connected to one side of the pulley (10), a secondary ruler (12) is provided inside the pulley (10), and a limit magnet (13) is provided inside the profile device (1).

2. A high-precision grating ruler structure for repeated positioning according to claim 1, characterized in that: Two limiting magnets (13) are installed inside the profile device (1), one on the left and one on the right.

3. A high-precision grating ruler structure for repeated positioning according to claim 2, characterized in that: A selectable zero position magnet (14) is provided inside the profile device (1).

4. The high-precision grating ruler structure for repeated positioning according to claim 3 is characterized in that: The dust-proof strips (3) are provided in two groups, and each group of the dust-proof strips (3) is distributed on both sides of the profile device (1).

5. The high-precision grating ruler structure for repeated positioning according to claim 4, characterized in that: The steel belts (4) are provided in two groups, and the two groups of steel belts (4) are distributed at ninety degrees.

6. The high-precision grating ruler structure for repeated positioning according to claim 5, characterized in that: The bearings (11) are provided in five groups, two groups of the bearings (11) move on the side of the grating glass (5), and three groups of the bearings (11) move on the front of the grating glass (5).

7. The high-precision grating ruler structure for repeated positioning according to claim 6, characterized in that: The magnets (8) are distributed on the bottom and side surfaces of the pulley (10) and are placed at ninety degrees.

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