Grating ruler moving mechanism with simple structure

Abstract

The utility model discloses a grating ruler moving mechanism with a simple structure. The grating ruler moving mechanism comprises a vehicle body and a moving body, a first roller pin parallel to the Y axis and a second roller pin parallel to the Z axis are arranged on one side face of the trolley body. The moving body is arranged on the vehicle body and provided with a rod body parallel to the X axis. The first roller pin parallel to the Y axis and the second roller pin parallel to the Z axis are arranged on one side face of the vehicle body, the rod body parallel to the X axis is arranged on the moving body in a matched mode, the rod body makes contact with the outer side of the first roller pin and the upper side of the second roller pin, and the rod body directly exerts force in the Z-axis direction and the Y-axis direction on the first roller pin and the second roller pin; forces in the Z-axis direction and the Y-axis direction are transmitted and transferred to bearings of the vehicle body to assist in limiting the freedom degree of movement of the vehicle body, so that it is guaranteed that the vehicle body can only stably move back and forth in the X-axis direction when the moving body moves, the structure is simple, cost is low, and the forces in different directions can be independently adjusted and do not affect one another.

Description

Technical Field

[0001] The utility model relates to the technology in the field of grating scales, in particular to a grating scale moving mechanism with a simple structure. Background Art

[0002] A grating scale is a key sensor for closed-loop control of high-grade numerical control equipment. Based on the Moiré fringe principle, the grating scale scans and obtains the optical signals of the grating lines of a linear grating and an indicating grating that are moving relative to each other, and converts them into sinusoidally fluctuating current signals for measurement. Usually, the measurement accuracy of a grating scale depends on the grating line accuracy of its grating and the straightness of installation. However, for high-precision measurement, the grating scale must ensure that the grating lines of the indicating grating in its reading head carriage are always aligned with the direction of the grating lines of the linear grating to obtain an ideal sinusoidally fluctuating current signal. Otherwise, when the grating lines of the indicating grating in the reading head carriage form an angle with the grating lines on the linear grating, the obtained current signal will have spikes or jitters, resulting in an unstable situation when the subsequent circuit processes the signal, which also reduces the position measurement accuracy.

[0003] The existing grating scale structures are divided into low-precision and high-precision types. The low-precision grating scale structure has a driving structure in which a steel ball in a spring rod sleeve presses on a V-shaped groove. Although this structure is simple, the return difference is not good enough, the force in different directions is not easy to adjust, and adjusting the force in one direction will affect the force in the other direction. Therefore, most manufacturers will choose to use high-precision grating scale structures. However, the high-precision grating scale structure is realized by using three cylindrical springs and two compression spring rods. This structure is complex, has many parts, and is costly. Therefore, it is necessary to propose a new solution to improve the above problems. Summary of the Utility Model

[0004] In view of this, in view of the deficiencies of the existing technology, the main purpose of the present utility model is to provide a grating scale moving mechanism with a simple structure, which can effectively solve the problems of many parts, complex structure, and high cost of the existing precision grating scale structure.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] A grating scale moving mechanism with a simple structure includes a vehicle body and a moving body; on one side surface of the vehicle body, there are provided a first set of needle rollers parallel to the Y-axis and a second set of needle rollers parallel to the Z-axis; the moving body is arranged on the vehicle body and is driven by the vehicle body to move. The moving body has a rod body parallel to the X-axis. The rod body contacts the outer side of the first set of needle rollers and the upper side of the second set of needle rollers.

[0007] As a preferred solution, a slot is provided on the side surface of the vehicle body, an elastic member is arranged in the slot, a driven arm extends from the moving body and extends into the slot, one end of the elastic member is in elastic contact with the driven arm, and the other end of the elastic member is in elastic contact with the inner wall surface of the slot.

[0008] As a preferred solution, the elastic member is a spring.

[0009] As a preferred solution, a first convex portion is convexly provided on the inner wall surface of the slot, a second convex portion is convexly provided on the surface of the driven arm, the second convex portion is located in the slot, and both ends of the elastic member are respectively sleeved on the first convex portion and the second convex portion.

[0010] As a preferred solution, a through slot is provided on the side surface of the vehicle body, the first needle roller parallel to the Y-axis and the second needle roller parallel to the Z-axis are both located in the through slot, and the rod body parallel to the X-axis extends into the through slot.

[0011] As a preferred solution, the vehicle body has five bearings, wherein two bearings are arranged on the upper side of the vehicle body, and three bearings are arranged on the side surface of the vehicle body.

[0012] As a preferred solution, it further includes a glass track, and the vehicle body is movably arranged on the glass track in a reciprocating manner.

[0013] As a preferred solution, it further includes a grating body, the grating body is provided with a receiving groove, and the glass track is arranged in the receiving groove.

[0014] As a preferred solution, the width of the upper end of the receiving groove is greater than the width of the lower end of the receiving groove.

[0015] As a preferred solution, the rod body is a spring rod.

[0016] Compared with the prior art, the present utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solutions:

[0017] By providing a first needle roller parallel to the Y-axis and a second needle roller parallel to the Z-axis on one side surface of the vehicle body, and cooperating with a rod body parallel to the X-axis arranged on the moving body, the rod body is in contact with the outer side of the first needle roller and the upper side of the second needle roller respectively, the rod body directly applies forces in the Z-axis direction and the Y-axis direction to the first needle roller and the second needle roller, and transfers the forces in the Z-axis direction and the Y-axis direction to the bearings of the vehicle body, so as to assist in restricting the degrees of freedom of the movement of the vehicle body, ensuring that when the moving body moves, the vehicle body can only move stably in the reciprocating motion in the X-axis direction. Moreover, the structure of the present utility model is simple and the cost is low, and the forces in different directions can be adjusted separately and independently without affecting each other.

[0018] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of an assembly perspective view of a preferred embodiment of the utility model;

[0020] Figure 2 It is an exploded view of a preferred embodiment of the utility model;

[0021] Figure 3 It is a partial assembly diagram of a preferred embodiment of the utility model;

[0022] Figure 4 yes Figure 3 Schematic diagram from another angle;

[0023] Figure 5 It is a partial assembly cross-sectional view of a preferred embodiment of the utility model.

[0024] Description of the accompanying drawings:

[0025] 10. Car body 101. Slot

[0026] 102, through groove 11, first needle roller

[0027] 12. Second needle roller 13. First convex part

[0028] 14. Bearing 20. Moving body

[0029] 21. Rod body 22. Follower arm

[0030] 221, second convex portion 30, elastic member

[0031] 40. Glass track 50. Grating body

[0032] 51. Storage tank. DETAILED DESCRIPTION

[0033] Please refer to Figures 1 to 5 As shown, it shows the specific structure of a preferred embodiment of the utility model, including a vehicle body 10 and a moving body 20.

[0034] On one side of the vehicle body 10, a first needle roller 11 parallel to the Y-axis and a second needle roller 12 parallel to the Z-axis are provided; in this embodiment, a slot 101 is formed on the side surface of the vehicle body 10, and an elastic member 30 is arranged in the slot 101, and the elastic member 30 is a spring; a first convex portion 13 protrudes from the inner wall surface of the slot 101; in addition, a through slot 102 is formed on the side surface of the vehicle body 10, and the first needle roller 11 parallel to the Y-axis and the second needle roller 12 parallel to the Z-axis are both located in the through slot 102; and, the vehicle body 10 has five bearings 14, wherein, two bearings 14 are arranged on the upper side of the vehicle body 10, and three bearings 14 are arranged on the side surface of the vehicle body 10.

[0035] The moving body 20 is arranged on the vehicle body 10 and is driven by the vehicle body 10 to move. The moving body 20 has a rod body 21 parallel to the X-axis. The rod body 21 contacts the outer side of the first needle roller 11 and the upper side of the second needle roller 12; in this embodiment, the moving body 20 extends out a driven arm 22, and the driven arm 22 extends into the slot 101. One end of the elastic member 30 elastically contacts the driven arm 22, and the other end of the elastic member 30 elastically contacts the inner wall surface of the slot 101; specifically, a second convex portion 221 protrudes from the surface of the driven arm 22, and the second convex portion 221 is located in the slot 101. Two ends of the elastic member 30 are respectively sleeved on the first convex portion 13 and the second convex portion 221; in addition, the rod body 21 parallel to the X-axis extends into the through slot 102; the rod body 21 is a spring rod.

[0036] And, it further includes a glass track 40 and a grating body 50. The vehicle body 10 is arranged on the glass track 40 so as to be movable back and forth; the grating body 50 is provided with a receiving groove 51, and the glass track 40 is arranged in the receiving groove 51, and the width of the upper end of the receiving groove 51 is greater than the width of the lower end of the receiving groove 51.

[0037] The design focus of the present utility model lies in: by providing a first needle roller parallel to the Y-axis and a second needle roller parallel to the Z-axis on one side surface of the vehicle body, and then cooperating with a rod body parallel to the X-axis arranged on the moving body, the rod body contacts the outer side of the first needle roller and the upper side of the second needle roller respectively, and the rod body directly applies forces in the Z-axis direction and the Y-axis direction to the first needle roller and the second needle roller, and transfers the forces in the Z-axis direction and the Y-axis direction to the bearings of the vehicle body, so as to assist in restricting the freedom degree of the movement of the vehicle body, so as to ensure that when the moving body moves, the vehicle body can only move back and forth stably in the X-axis direction. Moreover, the structure of the present utility model is simple and the cost is low, and the forces in different directions can be adjusted separately and independently without affecting each other.

[0038] The above are only the preferred embodiments of the present utility model, and do not impose any limitation on the technical scope of the present utility model. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A grating ruler moving mechanism with a simple structure, characterized in that: It includes a vehicle body and a moving body; a first roller needle parallel to the Y axis and a second roller needle parallel to the Z axis are arranged on one side of the vehicle body; the moving body is arranged on the vehicle body and is moved by the vehicle body, and the moving body has a rod body parallel to the X axis, the rod body contacts the outer side of the first roller needle, and the rod body contacts the upper side of the second roller needle.

2. The grating ruler moving mechanism with a simple structure according to claim 1 is characterized in that: A slot is provided on the side of the vehicle body, in which an elastic member is arranged, a driven arm extends from the moving body, and the driven arm extends into the slot, one end of the elastic member is in elastic contact with the driven arm, and the other end of the elastic member is in elastic contact with the inner wall surface of the slot.

3. The simple structure grating ruler moving mechanism according to claim 2 is characterized in that: The elastic member is a spring.

4. The simple structure grating ruler moving mechanism according to claim 3 is characterized in that: A first convex portion is convexly provided on the inner wall surface of the slot, a second convex portion is convexly provided on the surface of the driven arm, the second convex portion is located in the slot, and two ends of the elastic member are respectively sleeved on the first convex portion and the second convex portion.

5. The grating ruler moving mechanism with a simple structure according to claim 1 is characterized in that: A through slot is provided on the side of the vehicle body, the first roller needle parallel to the Y axis and the second roller needle parallel to the Z axis are both located in the through slot, and the rod body parallel to the X axis extends into the through slot.

6. The grating ruler moving mechanism with a simple structure according to claim 1 is characterized in that: The vehicle body has five bearings, wherein two bearings are arranged on the upper side of the vehicle body and three bearings are arranged on the side surfaces of the vehicle body.

7. The grating ruler moving mechanism with a simple structure according to claim 1 is characterized in that: The vehicle further comprises a glass track, on which the vehicle body can be reciprocated and moved.

8. The simple structure grating ruler moving mechanism according to claim 7 is characterized in that: It further comprises a grating body, the grating body is provided with a receiving groove, and the glass track is arranged in the receiving groove.

9. The simple structure grating ruler moving mechanism according to claim 8 is characterized in that: The width of the upper end of the accommodating groove is greater than the width of the lower end of the accommodating groove.

10. The grating ruler moving mechanism with a simple structure according to claim 1 is characterized in that: The rod body is a spring rod.

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