Grating ruler for suspension magnetic drive moving mechanism

Abstract

The utility model discloses a grating ruler for a suspension magnetic drive moving mechanism, which comprises a ruler body and a mounting cavity arranged at the central position in the ruler body, and a scale grating is fixedly mounted in the mounting cavity; blocking end covers are fixedly arranged at the left end and the right end of the scale body, and the scale body and the scale grating are installed through the blocking end covers which are symmetrically arranged; a bearing bottom plate is arranged on the top surface of the ruler body in a sliding manner, and a reading head is fixedly mounted on the top surface of the bearing bottom plate; wherein dust removal mechanisms are arranged on the left side and the right side of the top face of the bearing bottom plate correspondingly, and positioning mechanisms are arranged on the front side and the rear side in the bearing bottom plate correspondingly. According to the grating ruler for the suspension magnetic drive moving mechanism, the positioning side plates on the front side and the rear side of the bearing bottom plate are matched with the positioning mechanism to adapt to ruler bodies of different specifications and lengths, and the dust removal mechanism assists the reading head in dust removal during moving measurement, so that the moving stability and the reading accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grating rulers, in particular to a grating ruler for a suspended magnetic drive moving mechanism. Background Art

[0002] Grating rulers, also known as grating ruler displacement sensors, are often used in closed-loop servo systems of CNC machine tools. They can be used to detect linear displacement or angular displacement. In the suspended magnetic drive moving mechanism, the magnetic suspension motor is the main actuator of the entire servo system. It does not need to go through any mechanical conversion device to directly output linear torque, which greatly improves the system response time and reduces noise and loss during operation. However, the stable operation of the magnetic suspension motor depends on high-precision position recognition technology to achieve accurate monitoring and control of the position of the mover. Therefore, the grating ruler needs to be adapted to different specifications and can reduce errors.

[0003] For example, a grating ruler structure disclosed in publication number CN107941156A is characterized in that the grating ruler and the reading head are arranged in a rectangular housing, and the housing is used to be installed on the feeder of the lathe, and the movable part of the feeder is connected to the telescopic rod. When the movable part of the feeder moves, the telescopic rod is driven to stretch, and then the reading head is driven to move along the length direction of the grating ruler to achieve the measurement of the straight-line distance. During the whole process, the housing can protect the grating ruler and the reading head, and is installed on the feeder in an integrated manner, so as to ensure stable and reliable installation, improve the detection accuracy, and ensure the accurate feeding of the feeder;

[0004] However, the above-disclosed grating scale structure still has the following problems during actual use: although the scale body and the reading head are protected by the shell and installed in one piece on the feeder, the matching scale body itself also needs to be replaced during the detection process of different equipment, and then the entire grating scale needs to be disassembled. The operation steps are cumbersome and easily affect the accuracy of the grating scale. At the same time, this type of grating scale structure cannot clean itself, causing measurement errors after being contaminated with dust and oil.

[0005] Therefore, we propose a grating scale for a suspended magnetically driven moving mechanism in order to solve the above-mentioned problems. Utility Model Content

[0006] The purpose of the utility model is to provide a grating ruler for a suspended magnetic drive moving mechanism, in order to solve the problem that although the existing grating ruler protects the ruler body and the reading head through the shell and is installed on the feeder in an integrated manner, during the detection process of different equipment, the matching ruler body itself also needs to be replaced, and then the entire grating ruler needs to be disassembled, the operation steps are cumbersome, and the accuracy of the grating ruler is easily affected. At the same time, this type of grating ruler structure cannot achieve self-cleaning, and causes measurement errors after being contaminated with dust and oil.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grating ruler for a suspended magnetic drive moving mechanism, comprising a ruler body and a mounting cavity opened at the center position inside the ruler body, wherein a scale grating is fixedly mounted inside the mounting cavity;

[0008] The left and right ends of the ruler body are fixedly provided with blocking end caps, and the ruler body and the ruler grating are installed through the symmetrically arranged blocking end caps;

[0009] The ruler body is also provided with a bearing base plate on the top surface thereof, and a reading head is fixedly installed on the top surface of the bearing base plate;

[0010] Wherein, dust removal mechanisms are arranged on both the left and right sides of the top surface of the bearing bottom plate, and positioning mechanisms are arranged on both the front and rear sides of the interior of the bearing bottom plate.

[0011] Preferably, a transmission slot is provided at the inner center of the bearing base plate, and a reading head on the top surface of the bearing base plate reads the scale grating through the transmission slot, and guide grooves are provided on the front and rear sides of the outer portion of the scale body itself, and the symmetrically provided guide grooves correspond to the positioning mechanisms on the front and rear sides of the bearing base plate.

[0012] Preferably, the positioning mechanism includes a positioning side plate, and the top end of the positioning side plate is elastically slidably connected to the front and rear sides of the inner side of the supporting base plate, and the positioning mechanism includes an adjustment frame, and the adjustment frames on the front and rear sides are fixedly connected to the bottom ends of the symmetrically arranged positioning side plates, and the positioning side plates and the adjustment frames are driven to move through the supporting base plate.

[0013] Preferably, the positioning mechanism includes a clamping lifting plate, and the clamping lifting plate is slidably arranged on the upper and lower sides of the symmetrically opened guide slot, and the outer ends of the symmetrically arranged clamping lifting plate are slidably arranged inside the adjustment frame through elastic telescopic rods.

[0014] Preferably, the dust removal mechanism includes a dust removal base plate, and the inner ends of the symmetrically arranged dust removal base plate are slidably connected to the left and right sides of the top surface of the supporting base plate through resistance springs, and dust removal brush rollers are rotatably arranged on the outer sides of the symmetrically arranged dust removal base plate through bearings, and the bottom surfaces of the symmetrically arranged dust removal brush rollers are fitted to the top surface of the scale grating, and the dust removal brush rollers included in the dust removal mechanism are driven by the movement of the supporting base plate to remove dust and clean the scale grating.

[0015] Preferably, the guide grooves on the front and rear sides of the ruler body are arranged in an inverted "T"-shaped structure with opposite directions, and the guide grooves on the front and rear sides are snap-connected to the inner ends of the snap-on lifting plates included in the positioning mechanism, and the positioning mechanism is used to enhance the stability of the bearing base plate and the reading head during movement.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the grating ruler for the suspended magnetic drive moving mechanism is adapted to ruler bodies of different specifications and lengths by means of the positioning side plates on the front and rear sides of the bearing base plate in cooperation with the positioning mechanism, and the dust removal mechanism assists the reading head in dust removal during the moving measurement, so as to improve the stability of the movement and the accuracy of the reading. The specific contents are as follows:

[0017] 1. By installing the bearing base plate above the ruler body, the reading head on the top surface of the bearing base plate corresponds to the projection slot hole opened at the center position inside the bearing base plate, so that the measurement reading can be carried out through the opposite scale grating;

[0018] Furthermore, the elastically connected positioning side plates drive the adjustment frame and the clamping lifting plate to approach the guide slots provided on the front and rear sides of the ruler body, and then the clamping lifting plate enters the guide slot of the "T"-shaped mechanism by compressing the elastic telescopic rod, and the clamping lifting plate is again driven by the elastic telescopic rod to clamp and lock with the guide slot, so as to improve the stability of the reading head during movement;

[0019] 2. The dust removal base plate is always kept close to the top surface of the ruler body by the resistance spring, so that the dust removal brush roller can fit with the scale grating set inside the ruler body, and then the dust removal mechanisms on the left and right sides are driven to move synchronously during the movement of the reading head and the bearing base plate, so that the dust removal brush rollers on the left and right sides can clean the oil and dust stuck to the scale grating when moving, so as to ensure the accuracy of the measurement readings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the installation structure of the reading head of the utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of the load-bearing base plate of the utility model;

[0023] Figure 4 This is a schematic diagram of the installation structure of the adjustment frame of the utility model;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model for clamping and lifting;

[0025] Figure 6 This is a schematic diagram of the installation structure of the dust removal base plate of the utility model.

[0026] In the figure: 1. The ruler body; 2. The mounting cavity; 3. The scale grating; 4. The blocking end cover; 5. The bearing base plate; 6. The reading head; 7. The transmission slot; 8. The guide slide; 9. The positioning side plate; 10. The adjustment frame; 11. The clamping lifting plate; 12. The elastic telescopic rod; 13. The dust removal base plate; 14. The resistance spring; 15. The dust removal brush roller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-Figure 6 , the utility model provides the following technical solutions:

[0029] Embodiment 1: In order to solve the problem that the existing ruler body 1 and the reading head 6 cannot be conveniently disassembled and assembled, this embodiment adopts the following technical scheme: a grating ruler for a suspended magnetic drive moving mechanism, comprising a ruler body 1, and a mounting cavity 2 opened at the center position inside the ruler body 1, and a scale grating 3 is fixedly installed inside the mounting cavity 2; blocking end covers 4 are fixedly arranged at both ends of the ruler body 1, and the ruler body 1 and the scale grating 3 are installed by symmetrically arranged blocking end covers 4; a bearing bottom plate 5 is slidably arranged on the top surface of the ruler body 1, and a reading head 6 is fixedly installed on the top surface of the bearing bottom plate 5;

[0030] A transmission slot 7 is provided at the inner center of the bearing bottom plate 5, and a reading head 6 on the top surface of the bearing bottom plate 5 reads the scale grating 3 through the transmission slot 7. Guide slots 8 are provided on both the front and rear sides of the outer portion of the ruler body 1, and the symmetrically provided guide slots 8 correspond to the positioning mechanisms on the front and rear sides of the bearing bottom plate 5; the positioning mechanism includes a positioning side plate 9, and the top end of the positioning side plate 9 is elastically slidably connected to the front and rear sides of the inner portion of the bearing bottom plate 5, and the positioning mechanism includes an adjustment frame 10, and the adjustment frames 10 on the front and rear sides are fixedly connected to the bottom ends of the symmetrically arranged positioning side plates 9, and the positioning side plates 9 and the adjustment frames 10 are driven to move by the bearing bottom plate 5;

[0031] The positioning mechanism includes a clamping lifting plate 11, and the clamping lifting plate 11 is slidably arranged on the upper and lower sides of the inner side of the symmetrically opened guide slot 8, and the outer ends of the symmetrically arranged clamping lifting plate 11 are slidably arranged inside the adjustment frame 10 through the elastic telescopic rod 12; the guide slots 8 opened on the front and rear sides of the ruler body 1 are both arranged in an inverted "T"-shaped structure with opposite directions, and the guide slots 8 on the front and rear sides are clamped and connected to the inner ends of the clamping lifting plate 11 included in the positioning mechanism, and the stability of the bearing base plate 5 and the reading head 6 during the movement is improved by the positioning mechanism;

[0032] like Figure 2-Figure 4 As shown, when the ruler body 1 and the reading head 6 need to be disassembled and replaced, the positioning side plates 9 elastically connected to the front and rear sides of the bearing base plate 5 are first slid outward so as to exceed the width of the ruler body 1, and then the bearing base plate 5 is installed on the top surface of the ruler body 1, so that the transmission slot 7 opened inside the bearing base plate 5 corresponds to the scale grating 3 inside the installation cavity 2, and the clamping lifting plate 11 connected by the elastic telescopic rod 12 inside the adjustment frame 10 is manually slid inward so that its upper and lower range is smaller than the width of the guide slot 8 opened on the side of the ruler body 1, and then the bearing base plate 5 first drives the elastically connected positioning side plates 9 to slide inward synchronously, so that the positioning mechanism can enter the guide slot 8 opened on the front and rear sides of the ruler body 1, and then the clamping lifting plates 11 on the upper and lower sides of the adjustment frame 10 are manually released, so that the clamping lifting plates 11 are driven to slide outward synchronously after the elastic telescopic rods 12 on the left and right sides are extended, so as to be clamped in the guide slot 8, thereby ensuring the stability of the connection between the bearing base plate 5 and the positioning side plates 9 on the front and rear sides.

[0033] Embodiment 2: In order to solve the problem that the scale grating 3 inside the existing ruler body 1 cannot be cleaned and dusted, the present embodiment adopts the following technical scheme, wherein dust removal mechanisms are provided on both the left and right sides of the top surface of the bearing base plate 5, and positioning mechanisms are provided on both the front and rear sides of the inside of the bearing base plate 5; the dust removal mechanism includes a dust removal base plate 13, and the inner ends of the symmetrically arranged dust removal base plates 13 are slidably connected to the left and right sides of the top surface of the bearing base plate 5 through the resistance springs 14, and the outer inner sides of the symmetrically arranged dust removal base plates 13 are rotatably provided with dust removal brush rollers 15 through bearings, and the bottom surfaces of the symmetrically arranged dust removal brush rollers 15 are fitted to the top surface of the scale grating 3, and the dust removal brush rollers 15 included in the dust removal mechanism are driven by the movement of the bearing base plate 5 to remove dust from the scale grating 3;

[0034] like Figure 1-Figure 2 , Figure 6 As shown, the reading head 6 is fixedly mounted at the center of the top surface of the bearing base plate 5, so that the bottom surface of the reading head 6 corresponds to the top of the transmission slot 7, so that the reading head 6 can measure and read the scale grating 3 through the transmission slot 7 during the movement of the reading head 6;

[0035] Furthermore, during the movement of the reading head 6 and the bottom supporting base plate 5, the dust removal base plate 13 connected by the resistance spring 14 always maintains a position close to the top surface of the ruler body 1, so that the dust removal brush rollers 15 arranged on the inner and outer sides of the dust removal base plate 13 can fit with the scale grating 3 arranged inside the ruler body 1, and then during the movement of the reading head 6 and the supporting base plate 5, the dust removal mechanisms on the left and right sides are synchronously driven to move, so that the dust removal brush rollers 15 on the left and right sides can clean the oil and dust stuck to the scale grating 3 when moving, so as to ensure the accuracy of the measurement readings.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grating ruler for a suspended magnetic drive moving mechanism, comprising a ruler body (1), and a mounting cavity (2) opened at a central position inside the ruler body (1), wherein a scale grating (3) is fixedly mounted inside the mounting cavity (2); The left and right ends of the ruler body (1) are both fixedly provided with blocking end covers (4), and the ruler body (1) and the ruler grating (3) are installed through the symmetrically arranged blocking end covers (4); It is characterized in that Also includes: A bearing base plate (5) is slidably provided on the top surface of the ruler body (1), and a reading head (6) is fixedly mounted on the top surface of the bearing base plate (5); Wherein, dust removal mechanisms are provided on both the left and right sides of the top surface of the bearing bottom plate (5), and positioning mechanisms are provided on both the front and rear sides of the interior of the bearing bottom plate (5).

2. The grating ruler for a suspended magnetic drive moving mechanism according to claim 1, characterized in that: A transmission slot (7) is provided at the center of the interior of the bearing base plate (5), and a reading head (6) on the top surface of the bearing base plate (5) reads the scale grating (3) through the transmission slot (7). Guide slots (8) are provided on both the front and rear sides of the exterior of the scale body (1), and the symmetrically provided guide slots (8) correspond to the positioning mechanisms on the front and rear sides of the bearing base plate (5).

3. The grating ruler for a suspended magnetic drive moving mechanism according to claim 1, characterized in that: The positioning mechanism comprises a positioning side plate (9), and the top end of the positioning side plate (9) is elastically slidably connected to the front and rear sides of the inner side of the supporting base plate (5), and the positioning mechanism comprises an adjustment frame (10), and the front and rear adjustment frames (10) are fixedly connected to the bottom ends of the symmetrically arranged positioning side plates (9), and the positioning side plates (9) and the adjustment frames (10) are driven to move by the supporting base plate (5).

4. The grating ruler for a suspended magnetic drive moving mechanism according to claim 3, characterized in that: The positioning mechanism comprises a clamping lifting plate (11), and the clamping lifting plate (11) is slidably arranged on the upper and lower sides of the inner side of the symmetrically opened guide slot (8), and the outer end of the symmetrically arranged clamping lifting plate (11) is slidably arranged inside the adjustment frame (10) via an elastic telescopic rod (12).

5. The grating ruler for a suspended magnetic drive moving mechanism according to claim 1, characterized in that: The dust removal mechanism comprises a dust removal base plate (13), and the inner ends of the symmetrically arranged dust removal base plate (13) are slidably connected to the left and right sides of the top surface of the bearing base plate (5) through the contact springs (14), and the outer inner sides of the symmetrically arranged dust removal base plate (13) are rotatably provided with dust removal brush rollers (15) through bearings, and the bottom surfaces of the symmetrically arranged dust removal brush rollers (15) are arranged in contact with the top surface of the scale grating (3), and the dust removal brush rollers (15) included in the dust removal mechanism are driven by the movement of the bearing base plate (5) to remove dust from the scale grating (3).

6. The grating ruler for a suspended magnetic drive moving mechanism according to claim 1, characterized in that: The guide slots (8) provided on the front and rear sides of the ruler body (1) are both arranged in an inverted "T"-shaped structure with opposite directions, and the guide slots (8) on the front and rear sides are snap-connected to the inner ends of the snap-connecting lifting plates (11) included in the positioning mechanism, and the positioning mechanism is used to lift the bearing base plate (5) and the reading head (6) to ensure stability during movement.

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