Alternating current motor overspeed protection device for stacker crane

Abstract

The utility model discloses an alternating-current motor overspeed protection device for a stacker crane. The alternating-current motor overspeed protection device comprises an alternating-current motor, the protection device further comprises an electromagnetic brake, a fan, a threaded conical shaft, a front fan cover, an encoder, a rear fan cover and an electromagnetic brake, a main shaft and a rear end cover are arranged in the alternating current motor, a deep groove ball bearing and a bearing outer cover are fixedly installed at the position of the rear end cover, a groove is formed in the bearing outer cover, and a double-lip framework oil seal is installed in the groove. A spline is arranged between the electromagnetic brake and the main shaft, and the electromagnetic brake is fixed on the main shaft through the spline; in the alternating current motor overspeed protection device provided by the utility model, the motor is provided with the electromagnetic brake and the fan, so that self-air-cooling is realized while braking deceleration parking is satisfied, and the temperature rise of the motor is effectively reduced; meanwhile, the cone shaft is matched with the encoder, the rotating speed of the motor can be transmitted to a control system, and therefore speed regulation and motor monitoring are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of alternating current motor, concretely is a kind of super-speed protection device for stacking machine with alternating current motor. BACKGROUND

[0002] Alternating current motor is used to realize the mechanical energy and the mutual conversion of alternating current energy. Alternating current motor is divided into synchronous motor and asynchronous motor. With the vigorous development of intelligent manufacturing and logistics industry, stacking machine and its driving device motor usher in new development opportunity, motor is the core of the driving device of stacking machine, so the performance and safety of motor are particularly important. Motor not only meets the load and performance requirements, but also meets safety and reliability. The greater the motor power, the stronger the carrying capacity of stacking machine, so the higher the safety requirement of motor. The existing ordinary alternating current motor has no safety protection device.

[0003] In the prior art, ordinary alternating current motor has no safety protection device, and most of the motors on the market are ordinary braking motors. When the motor is overloaded or short-circuited, the current cannot be effectively controlled to make the motor stop smoothly and decelerate. Especially when the motor needs to be stopped for a short time, the motor cannot be smoothly braked, which may cause damage to the driving module. At the same time, if the existing braking motor structure needs to be air-cooled, it needs to be separately connected to the power supply for fan cooling, and cannot realize self-air-cooling. Therefore, a super-speed protection device for stacking machine with alternating current motor is needed to meet people's needs. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of super-speed protection device for stacking machine with alternating current motor, for solving the motor emergency stop or need short time to stop motor, realize the smooth deceleration of motor, and, realize the real-time monitoring of motor speed, realize the control of speed. Make motor stop quickly, make motor be better protected when working, prolong the service life of motor. The purpose of the problem proposed in the technical background is realized.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a kind of super-speed protection device for stacking machine with alternating current motor, including alternating current motor;Protection device further includes electromagnetic brake, fan, threaded taper shaft, front wind cover, encoder, rear wind cover and electromagnetic brake, the main shaft and rear end cover are provided in the alternating current motor, the deep groove ball bearing and bearing outer cover are fixedly installed at the rear end cover, recess is opened on the bearing outer cover, double-lip skeleton oil seal is installed in the recess.

[0006] Preferably, the electromagnetic brake and the main shaft are installed with spline, the electromagnetic brake is fixed on the main shaft through spline, the same internal hexagonal screw is fixedly installed on the electromagnetic brake and the rear end cover, and the electromagnetic brake is fixedly installed on one side of the rear end cover through the internal hexagonal screw.

[0007] Preferably, a shaft blocking ring is fixedly connected between the fan and one end of the main shaft, and the fan is fixedly installed on the main shaft through the shaft blocking ring.

[0008] Preferably, a taper shaft nut is fixedly installed between the threaded taper shaft and the main shaft, and the threaded taper shaft is fixed on the main shaft through the taper shaft nut.

[0009] Preferably, the front fan cover is installed outside the electromagnetic brake, a same cross head screw is fixedly installed on the front fan cover and the rear end cover, the front fan cover is fixedly installed on the rear end cover through the cross head screw, the encoder is fixedly connected with the front fan cover, and the encoder is threadedly connected with the threaded taper shaft.

[0010] Preferably, the aviation plug is installed on the surface of the rear fan cover, a same cross head screw is installed on the aviation plug and the front fan cover, and the aviation plug is fixedly installed on the front fan cover through the cross head screw.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] (1) In the alternating current motor overspeed protection device, the motor is provided with an electromagnetic brake and a fan, so that the motor is self-air-cooled while meeting the requirements of braking, deceleration and parking, and the motor temperature rise is effectively reduced; meanwhile, the taper shaft can transmit the motor rotating speed to the control system through the cooperation with the encoder, so that the speed regulation and motor monitoring are realized. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 FIG. 1 is a partial cross-sectional structural schematic view of the alternating current motor overspeed protection device for the stacker crane according to the present application;

[0014] Fig. 2 FIG. 3 is a structural schematic view of the encoder and the rear fan cover of the alternating current motor overspeed protection device for the stacker crane according to the present application;

[0015] Fig. 3 FIG. 4 is a half cross-sectional structural schematic view of the alternating current motor overspeed protection device for the stacker crane according to the present application.

[0016] In the drawings: 1, alternating current motor; 2, main shaft; 3, deep groove ball bearing; 4, rear end cover; 5, bearing outer cover; 6, double-lip skeleton oil seal; 7, front fan cover; 8, aviation plug; 9, fan; 10, shaft blocking ring; 11, taper shaft nut; 12, threaded taper shaft; 13, encoder; 14, rear fan cover; 15, electromagnetic brake; 16, spline; 17, inner hexagonal screw. DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are merely a 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 fall within the scope of protection of the present application.

[0018] Embodiment 1: Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: an AC motor overspeed protection device for piler, it include: AC motor 1, in order to be able to make motor smooth deceleration when emergency stop, reduce the damage caused to motor by emergency brake, protection device further include electromagnetic brake 15, fan 9, threaded taper shaft 12, front fan cover 7, encoder 13, rear fan cover 14 and electromagnetic brake 15, AC motor 1 is equipped with base, flange end cover, stator core, rotor assembly, main shaft 2, rear end cover 4 etc., there is winding stator core and rotor in the motor inside, above all are essential structural components in the operation of basic motor, part of non-improved basic structure is not embodied in drawing, winding stator core and rotor are installed in base interior, fixed by flange end cover and rear end cover 4 on base, and deep groove ball bearing 3 and bearing outer cover 5 are assembled at rear end cover, recess is opened on bearing outer cover 5, double-lip skeleton oil seal 6 is assembled in recess, equipment is braked by electromagnetic brake 15, the operating state of equipment can be monitored by encoder 13, and encoder 13 is protected by fan 9 and is cooled;

[0019] In order to realize the function of monitoring motor operating state and protecting motor under emergency brake, electromagnetic brake 15 is connected with main shaft 2 by spline 16 and A-shaped key, and is fixed on rear end cover 4 by internal hexagonal screw 17, fan 9 is fixed on the end of main shaft 2 by shaft retainer 10, threaded taper shaft 12 is fixed on the end of main shaft 2 by taper shaft nut 11, and is used in cooperation with encoder 13, front fan cover 7 has fan cover dust cover, is assembled outside electromagnetic brake 15, and is fixed on rear end cover 4 by cross disk head screw 18, encoder 13 is connected with front fan cover 7 by encoder connecting sheet, rear fan cover 14 is provided with aviation plug 8, and is fixed on front fan cover by cross disk head screw 18.

[0020] As a further improvement of the above scheme, the AC motor 1 with electromagnetic brake 15 and fan 9 is externally protected by rear fan cover 14, and is locked and assembled with AC motor rear end cover 5 by cross slot flange screw 18,

[0021] Further, the rear end of the front shroud 7 is provided with a rear shroud 14, which is locked and assembled with the front shroud through cross slot flange face screws 18. Inside the rear shroud 14, an encoder 13 is fixed to the front shroud 7 through a connecting sheet and is installed in cooperation with the threaded taper shaft 12.

[0022] In actual application, the rear shroud 14 is externally provided with an aviation plug 8, and the signal line of the encoder 13 is connected to the aviation plug 8.

[0023] In operation, a large torque electromagnetic brake 15 is installed at the rear end of the motor, which is used for braking when the motor is braked and decelerated. The front shroud 7 is installed on the rear end cover 4, and the fan 9 is installed in the front shroud 7. Air flow is generated by the rotation of the fan 9 and blows to the braking part, so that the motor can achieve axial self-fan cooling, i.e. the motor itself is cooled by the fan, and the cooling does not need external power supply, effectively solving the problem of motor heating. The encoder 13 is installed on the outside of the front shroud, and is fixed to the end of the main shaft 2. The encoder 13 can be used for real-time monitoring of the motor speed and running state. Through the cooperation of the electromagnetic brake 15, the encoder 13 and the fan 9, the running state of the motor can be monitored in real time during operation. The electromagnetic brake 15, the fan 9 and the encoder 13 in the motor are effectively fixed by cross disc head screws 18 and spline 16 fasteners. The fan 9 protects the encoder 13 when working. The electromagnetic brake 15 can monitor the running state of the motor, realizes the integration of the motor, the electromagnetic brake 15 and the encoder 13, saves the axial space of the motor, makes the internal structure more compact, and realizes self-air cooling while braking and decelerating, effectively reduces the temperature rise of the motor. At the same time, the threaded taper shaft 12 is connected with the encoder 13, which can transmit the motor speed to the control system, so as to realize speed regulation and motor monitoring.

[0024] The working principle is that: the motor rear end is provided with a large torque electromagnetic brake 15, the electromagnetic brake 15 is used for braking when the motor is braked and decelerated, the rear end cover 4 is provided with a front wind cover 7, the fan 9 is installed in the front wind cover 7, and air flow is generated by rotating the fan 9 and blown to the braking part, so that the motor can achieve axial self-fan cooling, that is, the motor itself is provided with a fan for cooling, and the cooling does not need external power supply, the motor heating problem is effectively solved, the electromagnetic brake 15 and the fan 9 can meet the braking and deceleration parking and realize self-air cooling, the motor temperature rise is effectively reduced, the encoder 13 is installed on the outside of the front wind cover, the encoder 13 is fixed at the end of the main shaft 2, the threaded taper shaft 12 is connected with the encoder 13, the motor rotating speed can be transmitted to the control system, the motor rotating speed and the running state can be monitored in real time by using the encoder 13, so that the speed regulation and motor monitoring are realized, the cooperation of the electromagnetic brake 15, the encoder 13 and the fan 9 can realize real-time monitoring of the running state of the motor during operation and monitoring and control of the main shaft 2 rotating speed, and the motor has the advantages of convenient installation, high safety, small noise, compact structure and the like.

[0025] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An overspeed protection device for an AC motor used in a palletizer, comprising an AC motor (1); characterized in that: The protection device also includes an electromagnetic brake (15), a fan (9), a threaded tapered shaft (12), a front shroud (7), an encoder (13), a rear shroud (14), and an electromagnetic brake (15). The AC motor (1) is equipped with a main shaft (2) and a rear end cover (4). A deep groove ball bearing (3) and a bearing outer cover (5) are fixedly installed at the rear end cover (4). A groove is opened on the bearing outer cover (5), and a double-lip skeleton oil seal (6) is installed in the groove.

2. The overspeed protection device for an AC motor of a palletizer according to claim 1, characterized in that: A spline (16) is installed between the electromagnetic brake (15) and the spindle (2). The electromagnetic brake (15) is fixed to the spindle (2) by the spline (16). The same internal hexagon screw (17) is fixedly installed on the electromagnetic brake (15) and the rear end cover (4). The electromagnetic brake (15) is fixedly installed on one side of the rear end cover (4) by the internal hexagon screw (17).

3. The overspeed protection device for an AC motor in a palletizer according to claim 1, characterized in that: A retaining ring (10) is fixedly connected between the fan (9) and one end of the spindle (2), and the fan (9) is fixedly mounted on the spindle (2) by the retaining ring (10).

4. The overspeed protection device for an AC motor of a palletizer according to claim 1, characterized in that: A tapered nut (11) is fixedly installed between the threaded tapered shaft (12) and the main shaft (2), and the threaded tapered shaft (12) is fixed on the main shaft (2) by the tapered nut (11).

5. The overspeed protection device for an AC motor in a palletizer according to claim 4, characterized in that: The front shroud (7) is installed outside the electromagnetic brake (15). The same cross head screw (18) is fixedly installed on the front shroud (7) and the rear end cover (4). The front shroud (7) is fixedly installed on the rear end cover (4) by the cross head screw (18). The encoder (13) is fixedly connected to the front shroud (7) and the encoder (13) is threadedly connected to the threaded tapered shaft (12).

6. The overspeed protection device for an AC motor of a palletizer according to claim 5, characterized in that: An aviation plug (8) is installed on the surface of the rear shroud (14). The aviation plug (8) and the front shroud (7) are fitted with the same cross head screw (18). The aviation plug (8) is fixedly installed on the front shroud (7) by the cross head screw (18).

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