Synchronous electric spindle

Abstract

The utility model discloses a synchronous motorized spindle which comprises an outer shaft barrel, a front end cover body and a rear end cover, the front end cover body and the rear end cover are fixed to the two ends of the outer shaft barrel, an encoder square installation box is fixed to the top end of the front end cover body, and a spindle body is rotationally installed in the outer shaft barrel. The front end cover body is communicated with the internal cavity space of the encoder square installation box, and the top end of the encoder square installation box is in bolted connection with an upper sealing cover. According to the utility model, the square encoder mounting box and the front end cover body form a space area for mounting the hollow shaft incremental encoder, a worker can concentrically assemble the hollow shaft incremental encoder to be mounted in the front end cover body, and the encoder is mounted in the reserved areas on the front end cover body and the square encoder mounting box, so that the hollow shaft incremental encoder can be mounted in the front end cover body. Accuracy and stability of measuring points are ensured, and processing precision loss caused by position rotation errors of the main shaft body can be eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spindles, in particular to a synchronous electric spindle. Background Art

[0002] The main function of the synchronous electric spindle is to provide high-speed rotation, transmit power and ensure synchronization. Through the coordinated action of multiple key components such as motor drive, bearing support, spindle, transmission system and cooling system, the synchronous electric spindle can maintain a stable working state under high-speed operation to ensure the accuracy and efficiency of the processing process. Its structure is complex, including components such as motor, bearing system, spindle, transmission system and cooling system. The components work closely together to complete the machine tool processing tasks. The motor, as the driving source of the spindle, provides the required speed and torque through the control system. The bearing system supports the spindle, reduces friction and vibration, and ensures smooth rotation of the spindle. The spindle, as a core component, is made of high-strength metal material with good rigidity and wear resistance. The transmission system transmits the rotational force generated by the motor to the spindle. However, the current synchronous electric spindle does not have a housing area reserved for the installation of a hollow shaft incremental encoder on its own housing. The hollow shaft incremental encoder monitors the movement state of the spindle in real time and provides feedback information to the control system, thereby adjusting the output of the motor and maintaining the synchronous operation of the spindle and the motor. There is no suitable installation position on the synchronous electric spindle housing, making it difficult for the machine tool monitoring and control system to obtain accurate data of the electric spindle, thereby reducing the real-time control capability of the spindle movement. Utility Model Content

[0003] The utility model aims to provide a synchronous electric spindle, in which an area for installing a hollow shaft incremental encoder is reserved on the housing end cover of the synchronous electric spindle, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a synchronous electric spindle, comprising an outer shaft cylinder and a front end cover body and a rear end cover fixed at both ends of the outer shaft cylinder, an encoder square mounting box is fixed to the top end of the front end cover body, a spindle body is rotatably mounted inside the outer shaft cylinder, internal cavity spaces of the front end cover body and the encoder square mounting box are connected to each other, an upper sealing cover is bolted to the top end of the encoder square mounting box, and a through hole is opened on the outer wall of one side of the encoder square mounting box.

[0005] Preferably, a coolant guide groove is provided on the outer surface of the outer shaft cylinder.

[0006] Preferably, the front end cover body includes a fixed plate fixed to one end of the outer shaft cylinder, and an outer shaft sleeve installed on the outer wall of one side of the fixed plate, an inner shaft ring is fixed at the center position inside the outer shaft sleeve, and the encoder square mounting box is fixed to the top of the inner shaft ring.

[0007] Preferably, a plurality of equidistant reinforcing ribs are provided on the outer walls of the outer sleeve and the inner shaft ring.

[0008] Preferably, a protective sleeve is fixed to the top end of the inner shaft ring, and a flange ring is fixed to the outer wall of the protective sleeve on a side away from the square installation box of the encoder.

[0009] Preferably, a flange is welded to one end of the surface of the rear end cover.

[0010] Preferably, the square installation box and upper sealing cover of the encoder are both made of alloy steel.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the synchronous electric spindle is provided with a front end cover body and an encoder square mounting box and other structures that cooperate with each other, and the encoder square mounting box and the front end cover body are used to form a space area for installing a hollow shaft incremental encoder. The staff can concentrically assemble the hollow shaft incremental encoder to be installed into the interior of the front end cover body. The hollow shaft incremental encoder can measure the rotation angle and position of the spindle in real time and accurately, and provide high-precision feedback information. By installing the encoder in the reserved area on the front end cover body and the encoder square mounting box, the accuracy and stability of the measuring point are ensured, which helps to eliminate the loss of machining accuracy caused by the position rotation error of the spindle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 3 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0015] Figure 4 This is a schematic diagram of the main structure of the utility model;

[0016] In the figure: 1. outer shaft cylinder; 101. coolant guide groove; 2. front end cover body; 201. fixed plate; 202. outer shaft sleeve; 203. inner shaft ring; 204. reinforcing ribs; 3. protective sleeve; 4. flange ring; 5. encoder square mounting box; 501. through hole; 6. upper sealing cover; 7. rear end cover; 8. flange plate; 9. spindle body. DETAILED DESCRIPTION

[0017] 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. Based on the embodiments in 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.

[0018] See also Figure 1-4 The utility model provides an embodiment: a synchronous electric spindle, comprising an outer shaft cylinder 1, a front end cover body 2 and a rear end cover 7 fixed at both ends of the outer shaft cylinder 1, an encoder square mounting box 5 is fixed on the top of the front end cover body 2, a spindle body 9 is rotatably mounted inside the outer shaft cylinder 1, the internal cavity spaces of the front end cover body 2 and the encoder square mounting box 5 are interconnected, an upper sealing cover 6 is bolted to the top of the encoder square mounting box 5, a through hole 501 is opened on the outer wall of one side of the encoder square mounting box 5, the encoder square mounting box 5 and the front end cover body 2 form a space area for installing a hollow shaft incremental encoder, the staff can concentrically assemble the hollow shaft incremental encoder to be installed into the interior of the front end cover body 2, and at this time, the cable of the hollow shaft incremental encoder is led out through the through hole 501;

[0019] The encoder square mounting box 5 and the upper sealing cover 6 are both made of alloy steel. The alloy steel has high hardness and wear resistance, and can resist wear caused by friction, vibration and particulate matter, thereby improving the reliability of the electric spindle.

[0020] The upper sealing cover 6 and the encoder square mounting box 5 are connected by a bolting structure. When the encoder needs to be replaced or maintained, maintenance personnel can more easily access the installation area on the encoder square mounting box 5, reducing the time required for maintenance by the staff;

[0021] The outer surface of the outer shaft cylinder 1 is provided with a coolant guide groove 101. The outer peripheral surface of the outer shaft cylinder 1 is provided with a coolant guide groove 101, and the coolant is guided to flow and cover through the coolant guide groove 101, so as to reduce the working temperature of the electric spindle;

[0022] The front end cover body 2 includes a fixed plate 201 fixed to one end of the outer shaft cylinder 1, and an outer shaft sleeve 202 installed on the outer wall of one side of the fixed plate 201, an inner shaft ring 203 is fixed at the center position inside the outer shaft sleeve 202, and the encoder square installation box 5 is fixed on the top of the inner shaft ring 203. A plurality of equidistant reinforcing ribs 204 are arranged on the outer walls of the outer shaft sleeve 202 and the inner shaft ring 203;

[0023] The fixed plate 201 is used as a basic support, the outer sleeve 202 is used as a connecting component, and the inner shaft ring 203 is used to support and assist the rotation of the spindle body 9, which makes the entire front end cover structure more solid, capable of withstanding high-speed rotation and various forces and vibrations during processing, ensuring the structural strength and stability of the synchronous electric spindle;

[0024] A protective sleeve 3 is fixed to the top of the inner shaft ring 203, and a flange ring 4 is fixed to the outer wall of the protective sleeve 3 on the side away from the encoder square mounting box 5. A flange plate 8 is welded to one end of the surface of the rear end cover 7. The protective sleeve 3 blocks the entry of dust, liquid and other contaminants, reduces the pollution and wear inside the main shaft, and helps to extend the service life of the main shaft.

[0025] When the embodiment of the present application is in use, first, the two ends of the outer shaft cylinder 1 are respectively fixed with the front end cover body 2 and the rear end cover 7, and an encoder square mounting box 5 is integrally formed at the top of the front end cover body 2. The encoder square mounting box 5 and the front end cover body 2 form a space area for installing the hollow shaft incremental encoder. The staff can concentrically assemble the hollow shaft incremental encoder to be installed into the interior of the front end cover body 2. At this time, the cable of the hollow shaft incremental encoder is led out through the through hole 501, and then the staff fixes an upper sealing cover 6 at the top opening of the encoder square mounting box 5 in the form of bolting, so that the encoder square mounting box 5 and the front end cover body 2 are in a closed state, and the hollow shaft incremental encoder can measure the rotation angle and position of the spindle in real time and accurately, and provide high-precision feedback information. By installing the encoder in the reserved area on the front end cover body 2 and the encoder square mounting box 5, the accuracy and stability of the measuring point are ensured, which helps to eliminate the machining accuracy loss caused by the position rotation error of the spindle body 9.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A synchronous electric spindle, characterized in that: The invention comprises an outer shaft cylinder (1), a front end cover body (2) and a rear end cover (7) fixed at both ends of the outer shaft cylinder (1); an encoder square mounting box (5) is fixed at the top end of the front end cover body (2); a main shaft body (9) is rotatably mounted inside the outer shaft cylinder (1); the internal cavity spaces of the front end cover body (2) and the encoder square mounting box (5) are interconnected; an upper sealing cover (6) is bolted to the top end of the encoder square mounting box (5); and a through hole (501) is opened on the outer wall of one side of the encoder square mounting box (5).

2. A synchronous electric spindle according to claim 1, characterized in that: The outer surface of the outer shaft cylinder (1) is provided with a cooling liquid guide groove (101).

3. A synchronous electric spindle according to claim 1, characterized in that: The front end cover body (2) comprises a fixed disk (201) fixed to one end of the outer shaft cylinder (1), and an outer shaft sleeve (202) installed on the outer wall of one side of the fixed disk (201), an inner shaft ring (203) is fixed at the center position inside the outer shaft sleeve (202), and the encoder square installation box (5) is fixed to the top of the inner shaft ring (203).

4. A synchronous electric spindle according to claim 3, characterized in that: A plurality of equidistant reinforcing ribs (204) are provided on the outer walls of the outer sleeve (202) and the inner ring (203).

5. A synchronous electric spindle according to claim 3, characterized in that: A protective sleeve (3) is fixed to the top end of the inner shaft ring (203), and a flange ring (4) is fixed to the outer wall of the protective sleeve (3) on a side away from the encoder square installation box (5).

6. A synchronous electric spindle according to claim 1, characterized in that: A flange (8) is welded to one end of the surface of the rear end cover (7).

7. The synchronous electric spindle according to claim 1, characterized in that: The square encoder installation box (5) and the upper sealing cover (6) are both made of alloy steel components.

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