Double-encoder motor for numerical control rotary table

Abstract

The utility model relates to the technical field of numerical control rotary tables, in particular to a double-encoder motor for a numerical control rotary table, which comprises a shell, a front end cover and a rear end cover are respectively mounted on two sides of the shell, an encoder mounting plate is fixedly mounted on one side, away from the shell, of the rear end cover, and a stator is fixedly arranged on the inner side of the shell. A rotating shaft is rotationally arranged in the middle of the front end cover and the middle of the rear end cover through rolling bearings, a rotor is fixedly arranged on the shaft wall, located in the shell, of the rotating shaft, a double-encoder structure is arranged at the end, located in the shell, of the rotating shaft and comprises a first encoder and a second encoder, and the first encoder is fixedly arranged on the side, away from the rotating shaft, of the encoder mounting plate. According to the utility model, through cooperative control of the double encoders, compared with a single-encoder motor, the rotation angle and direction can be measured more accurately, the resolution ratio of rotation angle and direction measurement is higher, the application range is wider, and more accurate motion control and data feedback can be provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control rotary table technical field, concretely is a double encoder motor for numerical control rotary table. BACKGROUND

[0002] Numerical control rotary table is the main functional component of numerical control machine tool, can complete the accurate rotation indexing positioning of workpiece on the workbench, is often called the fourth axis of numerical control machine tool, and the linkage of X, Y, Z coordinate axis of machine tool, can realize the complex machining process flow that conventional machine tool is difficult to complete.

[0003] In prior art, numerical control rotary table usually adopts single encoder motor, and the single encoder motor is only provided with one encoder, so that the accuracy of measuring rotation angle and direction is insufficient, the rotation angle and direction measurement resolution is low, and the application range is also narrow, and the single encoder motor cannot provide more accurate motion control and data feedback, therefore, the double encoder motor for numerical control rotary table is developed. UTILITY MODEL CONTENTS

[0004] The utility model discloses a double encoder motor for numerical control rotary table, and the rotation angle and direction can be more accurately measured through the cooperation of double encoders compared with single encoder motor, the rotation angle and direction measurement has higher resolution and wider application range, and more accurate motion control and data feedback can be provided, so as to solve the problems in the background art.

[0005] In order to achieve the above object, the utility model provides the following technical scheme:

[0006] A double encoder motor for numerical control rotary table, comprising a shell, the shell two sides are provided with front end cover and rear end cover respectively, the rear end cover is fixedly installed with an encoder mounting plate on the side away from the shell, a stator is fixedly arranged in the shell, a rotating shaft is rotatably arranged in the middle of the front end cover and the rear end cover through a rolling bearing, a rotor is fixedly arranged on the shaft wall in the shell, and a double encoder structure is arranged on one end of the rotating shaft in the shell.

[0007] Further, the double encoder structure comprises a first encoder and a second encoder, the first encoder is fixedly arranged on the side of the encoder mounting plate away from the rotating shaft, the output end of the first encoder penetrates to the other side of the encoder mounting plate and is fixedly connected with the second encoder, the output end of the second encoder is fixedly connected with the end of the rotating shaft, an encoder end cover is arranged outside the first encoder, the encoder end cover is fixedly connected with the rear end cover, and a connector is arranged on the upper end of the encoder end cover.

[0008] Further, an oil seal is arranged between the front end cover and the rotating shaft.

[0009] Further, the connector is a waterproof connector.

[0010] Further, the rotating shaft is provided with a flat key on both sides of the outer end of the shell.

[0011] Further, the two flat keys are symmetrically arranged.

[0012] Further, the outer wall of the front end cover is provided with an annular groove, and a sealing element is arranged in the annular groove.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The double-encoder motor for the numerical control rotary table is compared with the single-encoder motor, the two flat keys can improve the axial structural strength between the rotating shaft and the rotary table, and the transmission reliability is improved, the joint is provided as a waterproof joint, the waterproof joint has good sealing effect, the waterproof property of the joint is improved, the sealing effect between the double-encoder motor and the external rotary table can be further improved through the sealing element, and the installation and maintenance are more convenient, the double-encoder structure can accurately measure the rotation angle and direction, has higher resolution and wider application range for the rotation angle and direction measurement, can provide more accurate motion control and data feedback. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of a double-encoder motor for a numerical control rotary table.

[0016] Figure 2 It is a side view structural schematic view of a double-encoder motor for a numerical control rotary table.

[0017] Figure 3 It is a sectional view in the direction of A-A. Figure 2

[0018] In the figure: 1, first encoder; 2, encoder end cover; 3, joint; 4, rear end cover; 5, shell; 6, front end cover; 7, rotating shaft; 8, oil seal; 9, sealing element; 10, rolling bearing; 11, rotor; 12, stator; 13, second encoder; 14, encoder mounting plate; 15, flat key. DETAILED DESCRIPTION

[0019] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0020] Please refer to Figures 1 to 3 The present application provides a technical scheme:

[0021] A double encoder motor for a numerical control rotary table, comprising a shell 5, the shell 5 two sides are respectively provided with front end cover 6 and rear end cover 4, the rear end cover 4 is fixedly installed with encoder mounting plate 14 away from the side of shell 5, the inside of shell 5 is fixedly provided with stator 12, the middle of front end cover 6 and rear end cover 4 is rotatably provided with rotating shaft 7 through rolling bearing 10, the shaft wall inside shell 5 is fixedly provided with rotor 11, the two sides of the end of rotating shaft 7 outside shell 5 are provided with flat key 15, the two flat keys 15 are symmetrically arranged between the two flat keys 15, the design of the two flat keys 15 can improve the axial structural strength between rotating shaft 7 and rotary table, and further improve the transmission reliability.

[0022] The end of rotating shaft 7 inside shell 5 is provided with double encoder structure, the double encoder structure comprises first encoder 1 and second encoder 13, the first encoder 1 is fixedly arranged on the side of encoder mounting plate 14 away from rotating shaft 7, the output end of first encoder 1 penetrates to the other side of encoder mounting plate 14 and is fixedly connected with second encoder 13, the output end of second encoder 13 is fixedly connected with the end of rotating shaft 7, the outside of first encoder 1 is provided with encoder end cover 2, through the double encoder structure, the rotation angle and direction can be accurately measured, the rotation angle and direction measurement has higher resolution and wider application range, and more accurate motion control and data feedback can be provided.

[0023] The encoder end cover 2 is fixedly connected with the rear end cover 4, the upper end of the encoder end cover 2 is provided with a joint 3, the joint 3 is a waterproof joint, the waterproof joint has good sealing effect, and the waterproof property of the joint 3 is improved. The oil seal 8 is arranged between the front end cover 6 and the rotating shaft 7, the oil seal 8 is a mechanical element for sealing grease, which isolates the parts needing lubrication in the transmission part from the output part, so as not to cause leakage of lubricating oil.

[0024] The outer side wall of the front end cover 6 is provided with an annular groove, and a sealing element 9 is arranged in the annular groove, and the sealing effect between the double encoder motor and the external rotary table can be further improved through the sealing element 9.

[0025] The utility model is used for numerical control five -axis rotary table, with single encoder motor compares, the design of two flat keys 15 can improve the axial structural strength between rotating shaft 7 and rotary table, further improved transmission reliability, joint 3 is provided with waterproof joint, the sealing effect of waterproof joint is good, improved the waterproof of joint 3, through sealing element 9 can further improve the sealing effect between double encoder motor and external rotary table, and installation maintenance is more convenient, this double encoder structure can accurate measurement rotation angle and direction, has higher resolution and more extensive use range to rotation angle and direction measurement, can provide more accurate motion control and data feedback.

[0026] Although embodiments of the utility model have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual encoder motor for a numerically controlled rotary table comprising a housing (5), characterized in that: The shell (5) is respectively provided with a front end cover (6) and a rear end cover (4) on both sides, the rear end cover (4) is fixedly provided with an encoder mounting plate (14) on the side away from the shell (5), the inside of the shell (5) is fixedly provided with a stator (12), the middle of the front end cover (6) and the rear end cover (4) is rotatably provided with a rotating shaft (7) through a rolling bearing (10), the shaft wall inside the shell (5) is fixedly provided with a rotor (11) on the rotating shaft (7), and the rotating shaft (7) is provided with a double-encoder structure on one end inside the shell (5); The double-encoder structure comprises a first encoder (1) and a second encoder (13), the first encoder (1) is fixedly arranged on the side of the encoder mounting plate (14) away from the rotating shaft (7), the output end of the first encoder (1) penetrates to the other side of the encoder mounting plate (14) and is fixedly connected with the second encoder (13), the output end of the second encoder (13) is fixedly connected with the end of the rotating shaft (7), the first encoder (1) is externally provided with an encoder end cover (2), the encoder end cover (2) is fixedly connected with the rear end cover (4), and the upper end of the encoder end cover (2) is provided with a joint (3).

2. A dual encoder motor for a CNC rotary table according to claim 1, characterized in that: An oil seal (8) is arranged between the front end cover (6) and the rotating shaft (7).

3. A dual encoder motor for a numerically controlled rotary table according to claim 2, characterized in that: The joint (3) is a waterproof joint.

4. A dual encoder motor for a CNC rotary table according to claim 1, characterized in that: The rotating shaft (7) is provided with a flat key (15) on both sides of one end outside the shell (5).

5. A dual encoder motor for a numerically controlled rotary table according to claim 4 wherein: The two flat keys (15) are symmetrically arranged.

6. A dual encoder motor for a numerically controlled rotary table according to claim 1, characterized in that: The outside wall of the front end cover (6) is provided with an annular groove, and the annular groove is provided with a sealing element (9).

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