Connecting structure of grating ruler reading head

Abstract

The utility model discloses a connecting structure of a grating ruler reading head, belongs to the technical field of grating rulers, and mainly solves the problems that when a grating reading head in the prior art is maintained, plugs at the two ends are fixed, so that the plugs are difficult to detach, the grating reading head is inconvenient to slide out under the driving of the connecting structure, and inconvenience is brought to maintenance operation. The connecting structure comprises a connecting sliding frame, the connecting sliding frame is installed on a guide rail in a sliding mode, a grating reading head is fixedly installed at the bottom of the connecting sliding frame and located in the guide rail, sealing plugs are arranged at the two ends of the guide rail respectively, inserting columns are fixedly connected to the two ends of the guide rail respectively, and inserting holes are formed in the surfaces, close to each other, of the two sealing plugs respectively. The plug-in columns can be inserted into the insertion holes, guide grooves are formed in the sealing plugs, sliding blocks are installed in the guide grooves in a sliding mode, locking heads are fixed to one ends of the sliding blocks, grooves are formed in the surfaces of the plug-in columns, and the grooves are matched with the locking heads.

Description

Technical Field

[0001] The utility model relates to the technical field of grating rulers, and more specifically, to a connection structure of a grating ruler reading head. Background Art

[0002] Grating ruler, also known as grating ruler displacement sensor, is a measurement feedback device that works based on the optical principle of grating. Grating ruler is often used in closed-loop servo system of CNC machine tools and can be used for linear displacement detection. It mainly consists of two parts: scale grating and grating reading head. The base is generally located on the outside as a guide, and the grating reading head can slide on the inside. The base is also provided with an additional data connector. The grating reading head can transmit digital signals to the base through the cable. Therefore, in order to make the base move synchronously with the grating reading head during operation, it is necessary to use a suitable connection structure to connect the base and the grating reading head.

[0003] However, there are various types of connection structures in the prior art. For example, utility model patent CN211121050U relates to a sliding connection structure for a grating ruler reading head, which includes a guide rail, a slider, a grating ruler and a reading head; a cavity is provided in the guide rail, a slide groove is provided on one side of the guide rail, the slide groove is connected to the cavity, and the slide groove and the cavity form two limit walls; a mounting groove is provided on the side opposite to the cavity and the grating ruler is fixed in the mounting groove; an extension is provided on the inner side of the slider, and limit parts are provided at both ends of the extension; a first rolling bearing is provided at the upper and lower ends of one side of the reading head, and a second rolling bearing is provided at the upper and lower ends of the other side of the reading head, and the axes of the first rolling bearing and the second rolling bearing are perpendicular to each other; an elastic connecting member is connected between the reading head and the limit part at the lower end of the extension; the extension passes through the slide groove, and the elastic connecting member squeezes the limit parts at both ends of the extension to abut against the two limit walls, and squeezes the first rolling bearing to abut against the side of the grating ruler and squeezes the second rolling bearing to abut against the end face of the grating ruler.

[0004] Even if the slider and the slide groove in the connection structure are worn, it will not affect the relative position of the reading head and the grating scale, thereby ensuring the measurement accuracy. However, when maintaining the grating reading head in the structure, it is difficult to remove the plugs at both ends because the plugs are fixed. It is not convenient for the connection structure to drive the grating reading head to slide out, which brings inconvenience to the maintenance operation and is not conducive to sliding the reading head out, which brings inconvenience to its maintenance. Therefore, it is very necessary to design a connection structure for the grating scale reading head. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0006] To achieve the above-mentioned purpose, the present invention provides a connection structure of a grating ruler reading head, which is achieved by the following specific technical means:

[0007] A connection structure for a grating scale reading head includes a connecting slide, which is slidably mounted on a guide rail, a grating reading head fixedly mounted on the bottom of the connecting slide, and the grating reading head is located in the guide rail, sealing plugs are provided at both ends of the guide rail, and plug-in columns are fixedly connected to both ends of the guide rail, and sockets are provided on surfaces of the two sealing plugs close to each other, and the plug-in columns can be inserted into the sockets, and guide grooves are provided in the sealing plugs, and a slider is slidably mounted in the guide groove, a locking head is fixed to one end of the slider, and a groove is provided on the surface of the plug-in column, and the groove matches the locking head.

[0008] Preferably, a first compression spring is provided in the guide groove, and one end of the first compression spring is fixed to the slider. The first compression spring is in a compressed state. The first compression spring can press the slider so that the end of the locking head is stuck in the groove. The slider is cylindrical, and a limiting groove is provided on the surface of the slider.

[0009] Preferably, a movable cavity is provided in both sealing plugs, and the movable cavity is located on the side of the guide groove away from the guide rail. A pressing block is slidably installed inside the movable cavity, and one end of the pressing block is fixedly connected to a movable column, and the movable column matches the limiting groove. A second compression spring is provided in the movable cavity, and the movable column runs through the second compression spring. The second compression spring is in a compressed state, and the second compression spring can press the pressing block so that it abuts against the end of the movable cavity away from the guide groove.

[0010] Preferably, a base is fixedly installed on the top of the connecting slide, and assembly grooves are opened at both ends of the guide rail. The surfaces of the two sealing plugs close to each other are fixedly connected with mounting columns and embedded seats, and the embedded seats are located above the mounting columns. The mounting columns can be embedded in the assembly grooves, and the embedded seats can be embedded in the openings of the guide rails. Positioning ridges are provided on both sides of the embedded seats, and the positioning ridges are used to position and guide the assembled embedded seats.

[0011] Preferably, a scale grating is fixedly installed in the guide rail, and the scale grating is located on one side of the grating reading head. One side of the grating reading head is rotatably connected to a guide roller through a rotating shaft, and the guide roller abuts against the scale grating.

[0012] Preferably, the inner wall of the guide rail is provided with symmetrical sliding grooves, and sliding rails are provided on both sides of the connecting slide, and the sliding rails and the sliding grooves are slidably installed, and disassembly ports are provided on the top and bottom of the sealing plug.

[0013] Preferably, the connecting slide is in the shape of an I-beam, the two sealing plugs are symmetrically arranged, the plug-in column can be inserted into the interior of the socket, and pressing the pressing block can press the end of the movable column into the matching limit groove.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] When disassembling the sealing plug, you only need to press the pressing block to withdraw the locking head from the groove of the plug-in column, release the locking effect on the plug-in column, and then you can easily remove the two sealing plugs from both ends of the guide rail, thereby making it convenient for the connecting structure to drive the reading head to slide out of the guide rail, completing the maintenance of the grating reading head; and when reassembling the sealing plug, you need to press the pressing block again to insert the plug-in column into the socket and complete the locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a perspective structural diagram of the utility model;

[0019] Figure 3 It is a front cross-sectional schematic diagram of the sealing plug;

[0020] Figure 4 It is a schematic diagram of the structure enlarged at point A;

[0021] Figure 5 It is a side view structural diagram of the sealing plug;

[0022] Figure 6 Schematic diagram of the sealing plug during disassembly.

[0023] In the figure: 1. Guide rail; 2. Connecting slide; 3. Base; 4. Grating reading head; 5. Sealing plug; 6. Assembly groove; 7. Mounting column; 8. Plug column; 9. Socket; 10. Embedded seat; 11. Guide groove; 12. Slider; 13. Locking head; 14. First compression spring; 15. Limiting groove; 16. Pressing block; 17. Movable column; 18. Second compression spring; 19. Positioning ridge; 20. Scale grating; 21. Guide roller; 22. Slide groove; 23. Slide rail; 24. Disassembly port. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0027] like Figure 1 、 Figure 2 as well as Figure 5 As shown, it is a structural diagram of the connection structure of the grating scale reading head in this embodiment. The connection structure in this embodiment includes a connecting slide 2, the connecting slide 2 is I-shaped, the connecting slide 2 is slidably mounted on the guide rail 1, and a grating reading head 4 is fixedly mounted on the bottom of the connecting slide 2, and the grating reading head 4 is located in the guide rail 1. Sealing plugs 5 are provided at both ends of the guide rail 1, and the two sealing plugs 5 are symmetrically arranged. Plug-in columns 8 are fixedly connected to both ends of the guide rail 1, and the surfaces of the two sealing plugs 5 close to each other are provided with sockets 9, and the plug-in columns 8 It can be inserted into the socket 9, and both ends of the guide rail 1 are provided with assembly grooves 6. The surfaces of the two sealing plugs 5 that are close to each other are fixedly connected with mounting columns 7 and embedded seats 10; in order to assemble the two sealing plugs 5 at the two ends of the guide rail 1, first drive the grating reading head 4 into the guide rail 1 by the connecting slide 2, and then insert the mounting columns 7 and embedded seats 10 into the assembly groove 6 and the top opening of the guide rail 1, and at the same time insert the plug-in column 8 into the socket 9, so that the sealing plug 5 can be stably fitted to the two ends of the guide rail 1, and positioning ridges 19 are provided on both sides of the embedded seat 10.

[0028] like Figure 3 and Figure 4 As shown, in this embodiment, a guide groove 11 is provided in the sealing plug 5, and a slider 12 is slidably installed in the guide groove 11. A locking head 13 is fixed to one end of the slider 12. A groove is provided on the surface of the plug-in column 8, and the groove matches the locking head 13. A first compression spring 14 is provided in the guide groove 11, and a limiting groove 15 is provided on the surface of the slider 12. A movable cavity is provided in the two sealing plugs 5. The movable cavity is located on the side of the guide groove 11 away from the guide rail 1. A pressing block 16 is slidably installed inside the movable cavity. One end of the pressing block 16 is fixedly connected to a movable column 17, and the movable column 17 matches the limiting groove 15. A second compression spring 18 is provided in the movable cavity. When maintaining the reading head, in order to make the connecting structure drive the reading head to slide out, it is only necessary to press the pressing block 16 to withdraw the locking head 13 from the groove of the plug-in column 8, which can facilitate the removal of the two sealing plugs 5 from both ends of the guide rail 1 to ensure that maintenance work is more convenient.

[0029] It is worth noting that Figure 6 As shown, during the process of disassembling the sealing plug 5, the pressing block 16 is pressed, so that the pressing block 16 pushes the movable column 17 to move in the movable cavity in the direction close to the slider 12, and the end of the movable column 17 is abutted against the slider 12 and slowly embedded in the limiting groove 15, so that the slider 12 is lifted along the inclined surface of the movable column 17, and the locking head 13 is driven to move together by the upward sliding slider 12, and the locking head 13 is withdrawn from the groove of the plug-in column 8, thereby releasing the locking effect on the plug-in column 8 and completing the disassembly operation; and when reassembling the sealing plug 5, it is only necessary to press the pressing block 16 again to insert the plug-in column 8 into the socket 9 and complete the locking.

[0030] In addition, if Figure 2 As shown, in this embodiment, a base 3 is fixedly installed on the top of the connecting slide 2, a scale grating 20 is fixedly installed in the guide rail 1, and the scale grating 20 is located on one side of the grating reading head 4. One side of the grating reading head 4 is rotatably connected to a guide roller 21 through a rotating shaft, and the guide roller 21 abuts against the scale grating 20. When the grating ruler is installed on the machine tool for measurement operations, the scale grating 20 is fixed on the workbench of the machine tool, and the grating reading head 4 is installed on the fixed part of the machine tool. When the workbench of the machine tool moves, the scale grating 20 can move accordingly, and the grating reading head 4 detects this movement and converts it into an electrical signal.

[0031] like Figure 1 and Figure 2 As shown, in this embodiment, the inner wall of the guide rail 1 is provided with a symmetrical slide groove 22, and slide rails 23 are provided on both sides of the connecting slide 2, and the slide rails 23 are slidably installed with the slide groove 22, and the top and bottom of the sealing plug 5 are provided with a disassembly port 24.

[0032] It is worth noting that in this embodiment, the slider 12 is cylindrical, and one end of the first compression spring 14 is fixed to the slider 12. When the first compression spring 14 is in a compressed state, it can press the slider 12 so that the end of the locking head 13 is stuck in the groove, and the movable column 17 runs through the second compression spring 18. When the second compression spring 18 is in a compressed state, it can press the pressing block 16 so that it abuts against the end of the movable cavity away from the guide groove 11.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A connection structure for a grating ruler reading head, comprising a connecting carriage (2), the connecting carriage (2) being slidably mounted on a guide rail (1), a grating reading head (4) being fixedly mounted on the bottom of the connecting carriage (2), and the grating reading head (4) being located within the guide rail (1), characterized in that: Both ends of the guide rail (1) are provided with sealing plugs (5), both ends of the guide rail (1) are fixedly connected with plug posts (8), the surfaces of the two sealing plugs (5) close to each other are provided with plug holes (9), the plug posts (8) can be inserted into the plug holes (9), the sealing plugs (5) are provided with guide grooves (11), a slider (12) is slidably installed in the guide groove (11), a locking head (13) is fixed to one end of the slider (12), and a groove is provided on the surface of the plug post (8), and the groove matches the locking head (13).

2. The connection structure of a grating ruler reading head according to claim 1, characterized in that: A first compression spring (14) is provided in the guide groove (11), and one end of the first compression spring (14) is fixed to the slider (12). The first compression spring (14) is in a compressed state. The first compression spring (14) can press the slider (12) so that the end of the locking head (13) is clamped into the groove. The slider (12) is cylindrical, and a limiting groove (15) is provided on the surface of the slider (12).

3. The connection structure of a grating ruler reading head according to claim 1, characterized in that: A movable cavity is provided in each of the two sealing plugs (5), and the movable cavity is located on the side of the guide groove (11) away from the guide rail (1). A pressing block (16) is slidably installed inside the movable cavity, and one end of the pressing block (16) is fixedly connected to a movable column (17), and the movable column (17) matches the limiting groove (15). A second compression spring (18) is provided in the movable cavity, and the movable column (17) runs through the second compression spring (18). The second compression spring (18) is in a compressed state, and the second compression spring (18) can press the pressing block (16) to make it abut against the end of the movable cavity away from the guide groove (11).

4. The connection structure of a grating ruler reading head according to claim 1, characterized in that: A base (3) is fixedly installed on the top of the connecting slide (2), and assembly grooves (6) are provided at both ends of the guide rail (1). The surfaces of the two sealing plugs (5) close to each other are fixedly connected with mounting columns (7) and embedded seats (10), and the embedded seats (10) are located above the mounting columns (7). The mounting columns (7) can be embedded in the assembly grooves (6), and the embedded seats (10) can be embedded in the opening of the guide rail (1). Positioning ridges (19) are provided on both sides of the embedded seats (10), and the positioning ridges (19) are used to position and guide the assembled embedded seats (10).

5. The connection structure of the grating ruler reading head according to claim 1, characterized in that: A scale grating (20) is fixedly installed in the guide rail (1), and the scale grating (20) is located on one side of the grating reading head (4). One side of the grating reading head (4) is rotatably connected to a guide roller (21) via a rotating shaft, and the guide roller (21) abuts against the scale grating (20).

6. The connection structure of a grating ruler reading head according to claim 1, characterized in that: Symmetrical slide grooves (22) are provided on the inner wall of the guide rail (1), and slide rails (23) are provided on both sides of the connecting slide (2), and the slide rails (23) and the slide grooves (22) are slidably installed, and disassembly openings (24) are provided on the top and bottom of the sealing plug (5).

7. The connection structure of a grating ruler reading head according to claim 1, characterized in that: The connecting slide (2) is in an I-shape, and the two sealing plugs (5) are symmetrically arranged. The plug-in column (8) can be inserted into the inside of the socket (9), and pressing the pressing block (16) can press the end of the movable column (17) into the matching limiting groove (15).

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