Servo transmission device for press machine

Abstract

The utility model relates to a servo transmission device for a press machine, which comprises two permanent magnet servo motors which are connected with the same main shaft, and the main shaft is driven to rotate and stop at a fixed point by the double motors with the same torque through a servo motion control system. The permanent magnet servo motor comprises a stator and a rotor, torque rotation is generated between the stator and the rotor through a magnetic gap, the stator is directly fixed to the machine body, and the rotor is of a hollow shaft structure and is directly arranged on an equipment main shaft in a sleeving mode. A planetary reducer can be additionally arranged between the permanent magnet servo motor and the main shaft to amplify the torque. The rotating speed and the position of the main shaft can be detected through the rotary encoder, fixed-point braking is achieved in cooperation with the brake, the function of replacing a traditional mechanical clutch with large-torque rapid starting and stopping can be achieved, and servo driving of traditional mechanical equipment is achieved.

Description

Technical field:

[0001] The utility model relates to the technical field of press transmission, in particular to a servo transmission device for a press. Background technology:

[0002] At present, large torque transmission equipment such as mechanical presses and hot forging presses all use mechanical clutches for transmission. When working, the motor drives the working mechanism through the transmission mechanism and the clutch to apply process force to the workpiece. Although the above transmission structure can also meet the processing requirements, there are also some shortcomings, such as high energy consumption due to continuous idling of the motor, mechanical friction transmission, low efficiency and high noise. With the continuous development of permanent magnet servo motor technology, its advantages of energy saving, high efficiency, precision and low noise have been widely recognized. Therefore, it is necessary to apply permanent magnet servo motor technology to presses to solve some of the shortcomings of existing clutch transmission.

[0003] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility model content:

[0004] The purpose of the utility model is to solve the problems existing in the prior art and provide a servo transmission device for a press machine, which has the advantages of reasonable structural design, direct connection between the motor and the main shaft, no intermediate transmission process, high transmission efficiency, no idling of the motor and good energy-saving effect with its own permanent magnet, no transmission mechanical noise, low noise, and the ability to realize servo drive, etc.

[0005] The utility model achieves the above-mentioned purpose by adopting the following technical solutions:

[0006] A servo transmission device for a press machine includes two permanent magnet servo motors, which are respectively arranged on both sides of a main shaft. The main shaft is rotatably arranged on a machine body. The permanent magnet servo motor includes a stator and a rotor. The stator is arranged on the machine body, and the rotor is arranged on the main shaft. Torque rotation is generated between the stator and the rotor through a magnetic gap. A brake is arranged at one end of the main shaft, and a rotary encoder is arranged at the other end.

[0007] A mounting hole is arranged at the center of the rotor, the rotor is sleeved on the main shaft, and a key for transmitting power is arranged between the rotor and the main shaft.

[0008] A planetary reducer is connected between the permanent magnet servo motor and the main shaft.

[0009] The planetary reducer includes a gear ring arranged on a body, an outer cover is provided on the outer side of the gear ring, and an inner cover is provided on the inner side, an input shaft is rotatably provided at the center of the outer cover, a sun gear is provided on the input shaft, three planetary gears are provided between the sun gear and the gear ring, an input planet carrier is provided on the outer side of the planetary gear, and an output planet carrier is provided on the inner side, an output shaft is rotatably provided at the center of the inner cover, the output planet carrier is connected to the output shaft, and the output shaft is connected to the main shaft.

[0010] A circulating cooling channel is provided on the fuselage at a position corresponding to the stator, and a coolant flows through the circulating cooling channel to cool the permanent magnet servo motor.

[0011] The utility model adopts the above structure, which can bring the following beneficial effects:

[0012] Two permanent magnet servo motors are directly connected to the spindle to replace the traditional mechanical clutch transmission, realizing low-speed and high-torque drive, without intermediate transmission process, high transmission efficiency, no idling of the motor, and good energy-saving effect with permanent magnets, no transmission mechanical noise, low noise, and servo drive. The permanent magnet servo motor is connected to the spindle through a planetary reducer to amplify the torque. The speed and position of the spindle can be detected by the rotary encoder, and fixed-point braking can be achieved with the brake. The servo motion control system realizes the dual motors driving the spindle rotation and fixed-point stop with the same torque. Description of the drawings:

[0013] Figure 1 It is a structural schematic diagram of the servo transmission device for the press machine of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of adding a planetary reducer between the permanent magnet servo motor and the main shaft of the utility model;

[0015] Figure 3 It is a cross-sectional view of the planetary reducer of the utility model;

[0016] Figure 4 This is an exploded view of the planetary reducer of the utility model;

[0017] Figure 5 This is an exploded view of the planetary reducer of the utility model from another perspective;

[0018] In the figure, 1, permanent magnet servo motor, 101, stator, 102, rotor, 103, mounting hole, 2, main shaft, 3, fuselage, 4, brake, 5, rotary encoder, 6, planetary reducer, 601, ring gear, 602, outer cover, 603, inner cover, 604, input shaft, 605, sun gear, 606, planetary gear, 607, input planet carrier, 608, output planet carrier, 609, output shaft, 7, circulating cooling channel. Specific implementation method:

[0019] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0020] 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. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0021] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0022] Furthermore, the terms “lateral”, “medial”, “axial”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the position of the indicated technical features.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1-5 As shown, the servo transmission device for the press includes two permanent magnet servo motors 1, which are respectively arranged on both sides of the main shaft 2, and the main shaft 2 is rotatably arranged on the body 3. The permanent magnet servo motor 1 includes a stator 101 and a rotor 102, the stator 101 is arranged on the body 3, and the rotor 102 is arranged on the main shaft 2. Torque rotation is generated between the stator 101 and the rotor 102 through the magnetic gap. A brake 4 is arranged at one end of the main shaft 2, and a rotary encoder 5 is arranged at the other end. Two permanent magnet servo motors 1 are directly connected to the main shaft 2 to replace the traditional mechanical clutch transmission, so as to realize low-speed and high-torque drive, without intermediate transmission process, high transmission efficiency, no idling of the motor and good energy-saving effect of the self-contained permanent magnet, no transmission mechanical noise, low noise, and can realize servo drive.

[0025] The center of the rotor 102 is provided with a mounting hole 103, the rotor 102 is sleeved on the main shaft 2, and a key for transmitting power is provided between the rotor 102 and the main shaft 2. The sleeve connection mode has the advantages of convenient installation, compact installation, and reliable power transmission.

[0026] A planetary reducer 6 is connected between the permanent magnet servo motor 1 and the main shaft 2. The planetary reducer 6 can be designed to further reduce the speed and increase the output torque.

[0027] The planetary reducer 6 comprises a gear ring 601 arranged on the fuselage 3, an outer cover 602 is arranged on the outer side of the gear ring 601, an inner cover 603 is arranged on the inner side, an input shaft 604 is arranged at the center of the outer cover 602, a sun gear 605 is arranged on the input shaft 604, three planetary gears 606 are arranged between the sun gear 605 and the gear ring 601, an input planet carrier 607 is arranged on the outer side of the planetary gear 606, an output planet carrier 608 is arranged on the inner side, an output shaft 609 is arranged at the center of the inner cover 603, the output planet carrier 608 is connected to the output shaft 609, and the output shaft 609 is connected to the main shaft 2. The specific structural form of the planetary reducer 6 is given to achieve the connection with the rotor 102 and the main shaft 2.

[0028] A circulating cooling channel 7 is provided on the fuselage 3 at a position corresponding to the stator 101, and a coolant flows through the circulating cooling channel 7 to cool down the permanent magnet servo motor 1. The permanent magnet servo motor 1 is temperature-controlled to be in an optimal temperature working range.

[0029] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0030] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A servo drive device for a press, characterized in that: It includes two permanent magnet servo motors, which are respectively arranged on both sides of the main shaft. The main shaft is rotatably arranged on the fuselage. The permanent magnet servo motor includes a stator and a rotor. The stator is arranged on the fuselage, and the rotor is arranged on the main shaft. Torque rotation is generated between the stator and the rotor through the magnetic gap. A brake is arranged at one end of the main shaft, and a rotary encoder is arranged at the other end.

2. The servo drive device for a press machine according to claim 1, characterized in that: A mounting hole is arranged at the center of the rotor, the rotor is sleeved on the main shaft, and a key for transmitting power is arranged between the rotor and the main shaft.

3. The servo drive device for a press machine according to claim 1 or 2, characterized in that: A planetary reducer is connected between the permanent magnet servo motor and the main shaft.

4. The servo drive device for a press machine according to claim 3, characterized in that: The planetary reducer includes a gear ring arranged on a body, an outer cover is provided on the outer side of the gear ring, and an inner cover is provided on the inner side, an input shaft is rotatably provided at the center of the outer cover, a sun gear is provided on the input shaft, three planetary gears are provided between the sun gear and the gear ring, an input planet carrier is provided on the outer side of the planetary gear, and an output planet carrier is provided on the inner side, an output shaft is rotatably provided at the center of the inner cover, the output planet carrier is connected to the output shaft, and the output shaft is connected to the main shaft.

5. The servo drive device for a press machine according to claim 1 or 4, characterized in that: A circulating cooling channel is provided on the fuselage at a position corresponding to the stator, and a coolant flows through the circulating cooling channel to cool the permanent magnet servo motor.

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