Small hand pulse structure of numerical control machine tool

Abstract

The utility model relates to a small hand pulse structure of a numerical control machine tool. Comprising a rear cover, a circuit board, a code disc, a spindle, a body and bearings. The bearing is mounted at the bottom end of the inner cavity of the main body; the main shaft is arranged on the bearing inner ring; the code disc is arranged on the main shaft; the circuit board is installed on the rear cover, and the rear cover is installed at the top end of the main body. The technical problem that most hand pulse generators in the prior art are single in structure, can only be suitable for machine tools of general models, and cannot be suitable for machine tools of special models with small structural space requirements, so that the hand pulse generators are limited in practical application is solved.

Description

Technical Field

[0001] The utility model relates to the field of hand-cranked pulse generators, in particular to a small hand-cranked pulse structure for numerically controlled machine tools. Background Art

[0002] As a vital component of modern manufacturing, the CNC industry is experiencing rapid growth. Its development trends include intelligence, automation, networking, precision, and sustainable development. The CNC industry will better meet the needs of the manufacturing industry and drive the development and progress of the entire industry. However, the CNC industry also faces challenges, such as technological maturity and equipment costs. Only by continuously innovating and improving technological levels can the CNC industry maintain sustainable development and play its vital role.

[0003] Manual pulse generators, also known as hand pulse generators, hand pulses, or electronic handwheels, are used for zero-position correction and signal segmentation in CNC machine tools, printing machinery, and other applications. When the handwheel rotates, an encoder generates a signal corresponding to the handwheel's movement, which is then used by the CNC system to select and position the coordinates. Most existing manual pulse generators have a relatively simple structure, making them suitable only for general-purpose machine tools and not for specialized machine tools requiring less space. This limits their practical application. Utility Model Content

[0004] The embodiment of the present application solves the technical problem that most of the manual pulse generators in the existing technical solutions have relatively simple structures and can only be applied to general types of machine tools, but not to special types of machine tools with smaller structural space requirements, which leads to the technical problem that the manual pulse generators are limited in practical applications.

[0005] The technical solutions adopted in the embodiments of this application are as follows:

[0006] A small manual pulse structure for a CNC machine tool includes a back cover, a circuit board, a code disk, a spindle, a main body and a bearing; the bearing is mounted at the bottom end of the inner cavity of the main body; the spindle is arranged on the inner ring of the bearing; the code disk is arranged on the spindle; the circuit board is mounted on the back cover, and the back cover is mounted on the top end of the main body.

[0007] A further technical solution is: the main shaft is configured as a sawtooth structure; the angle between the saw teeth in the main shaft is 7.2° and the main shaft is evenly divided into fifty graduated saw teeth.

[0008] A further technical solution is: the main body is made of aluminum alloy.

[0009] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0010] 1. Due to the arrangement of the back cover, circuit board, code disk, spindle, main body, and bearings, and because the bottom end of the spindle is fixedly connected to the inner ring of the bearing, when the spindle rotates, the bearing arrangement can reduce friction, thereby reducing the error during the adjustment of the manual pulse structure. The user fixes the main body to the machine tool and fixes the back cover via the external thread on the end of the spindle. By rotating the spindle, the internal code disk rotates. The internal circuit board receives the transmitted signal, feeds back the selected coordinates, and positions the coordinates. Since the manual pulse structure of this CNC machine tool is small, it is used in special machine tools and environments with small structural space requirements, which can greatly improve the practicality of the manual pulse structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall exploded structure of a small hand pulse structure of a CNC machine tool in an embodiment of the utility model.

[0012] Figure 2 It is a partial structural diagram for reflecting the code disk in the embodiment of the present utility model.

[0013] In the figure: 1. Back cover; 2. Circuit board; 3. Code disk; 4. Spindle; 5. Main body; 6. Bearing. DETAILED DESCRIPTION

[0014] The embodiment of the present application solves the technical problem that most of the manual pulse generators in the existing technical solutions have relatively simple structures and can only be applied to general types of machine tools, but not to special types of machine tools with smaller structural space requirements, which leads to the technical problem that the manual pulse generators are limited in practical applications.

[0015] The technical solution in the embodiments of the present application is to solve the above problems, and the overall idea is as follows:

[0016] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] A small manual pulse structure for CNC machine tools, such as Figure 1 and Figure 2 As shown, it includes a back cover 1, a circuit board 2, a code disk 3, a spindle 4, a main body 5, and a bearing 6. The bearing 6 is mounted at the bottom end of the inner cavity of the main body 5. The spindle 4 is mounted on the inner ring of the bearing 6. The code disk 3 is mounted on the spindle 4. The circuit board 2 is mounted on the back cover 1, and the back cover 1 is mounted on the top of the main body 5.

[0018] The spindle 4 is configured as a sawtooth structure, wherein the angle between the saw teeth in the spindle 4 is 7.2° and the spindle 4 is evenly divided into fifty graduated saw teeth.

[0019] The main body 5 is made of aluminum alloy.

[0020] The rear cover 1 has a cable outlet. Bearing 6 is fixedly mounted at the bottom of the inner cavity of the main body 5. The bottom end of the main shaft 4 is fixedly connected to the inner ring of bearing 6. The code disk 3 is fixedly mounted on the main shaft 4. The circuit board 2 is fixed to the rear cover 1, and the rear cover 1 is removably fixed to the top of the main body 5. The main shaft 4 is manufactured using powder metallurgy and mold forming to ensure precision and dimensional stability. The code disk 3 adopts a reflective code disk design, and the conventional A and B code tracks are arranged into two code tracks with a 90-degree phase difference. This simplifies the difficulty of grating production and ensures the accuracy of the 90-degree A and B phase difference, while also preventing crosstalk between the A and B signals during signal reading. The circuit design of the circuit board 7 uses a reflective infrared transceiver module, combined with a light-emitting resistor and a sampling resistor to read the changes in the code disk stripes, achieving photoelectric conversion. The converted voltage signal is input to the positive terminal of the comparator. The resistor provides the comparison level to the negative terminal of the comparator. The resistor acts as a positive feedback resistor to ensure that the rising and falling edges after the A / D conversion are staggered, avoiding edge jitter during high-low level conversion. The resistor is the pull-up resistor of the comparator, which converts the AD conversion signal into a voltage signal for the user. The use of a reflective infrared transceiver module reduces the encoder's thickness by 10mm and its diameter by 20mm, making it more suitable for use in confined environments.

[0021] Due to the arrangement of the back cover 1, circuit board 2, code disk 3, main shaft 4, main body 5 and bearing 6, and because the bottom end of the main shaft 4 is fixedly connected to the inner ring of the bearing 6, when the main shaft 4 rotates, the arrangement of the bearing 6 can reduce friction, thereby reducing the error during the adjustment of the manual pulse structure. The user fixes the main body 5 to the machine tool and fixes the back cover 1 through the external thread at the end of the main shaft 4. By rotating the main shaft 4, the internal code disk 3 can be driven to rotate. The internal circuit board 2 receives the transmitted signal, feeds back the selected coordinates, and positions the coordinates. Since the manual pulse structure of this CNC machine tool is small, it is used for special machine tools and environments with small structural space requirements, thus greatly improving the practicality of the manual pulse structure.

[0022] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0023] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A small hand pulse structure for a CNC machine tool, characterized in that: It comprises a back cover (1), a circuit board (2), a code disc (3), a main shaft (4), a main body (5) and a bearing (6); the bearing (6) is mounted on the bottom end of the inner cavity of the main body (5); the main shaft (4) is arranged on the inner ring of the bearing (6); the code disc (3) is arranged on the main shaft (4); the circuit board (2) is mounted on the back cover (1), and the back cover (1) is mounted on the top end of the main body (5).

2. A small hand pulse structure for a CNC machine tool as claimed in claim 1, characterized in that: The main shaft (4) is configured as a sawtooth structure; the angle between the saw teeth in the main shaft (4) is 7.2°, and the main shaft (4) is evenly divided into fifty graduated saw teeth.

3. A small hand pulse structure for a CNC machine tool according to claim 1, characterized in that: The main body (5) is made of aluminum alloy.

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