A car arm device driven by a variable frequency motor

Abstract

The utility model discloses a vehicle arm device driven by a variable frequency motor, comprising: a counterweight device, a base, a variable frequency drive device, a vehicle arm and a vehicle body, wherein four sets of running wheels are arranged at the lower part of the vehicle body, and move along a fixed track; the base is arranged on the vehicle body; the counterweight device is arranged on the base; the variable frequency drive device is also arranged on the base; and the vehicle arm is arranged on the vehicle body. The utility model is installed on the vehicle body of the vehicle, and the counterweight balance is matched with the variable frequency motor drive device to realize stepless speed regulation of the vehicle arm lifting and lowering and low-impact stable lifting and lowering operation.

Description

Technical Field

[0001] The utility model relates to mechanical equipment, in particular to a vehicle shifting arm device driven by a variable frequency motor. Background Art

[0002] The car pusher is an important equipment in the car tipping machine system. It is mainly used in large-scale automatic unloading systems of power plants, ports, metallurgy, coal, coking and other enterprises. It is a device for unloading bulk materials loaded on railway open cars. During the operation of the car tipping machine system, the railway freight cars are pulled and pushed to the designated position in the car tipping machine system. The car pusher arm device is an important component of the car pusher. There are several main forms of the existing car pusher arm device: hydraulic balance combined with hydraulic drive car pusher arm form; counterweight balance combined with hydraulic drive car pusher arm form; counterweight balance combined with motor reducer drive car pusher arm form.

[0003] In order to meet the requirements of the car-push machine to pull a whole train of heavy cars, the car-push machine's car-push arm is high in strength and weight, and has a large inertial impact when starting and stopping. The hydraulically driven car-push arm device is equipped with a cylinder buffer device or a proportional speed control device, which can effectively reduce the impact of the car-push arm when starting and stopping, and ensure the smooth operation of the car-push machine. However, the maintenance and maintenance technology of the hydraulic system is difficult and the workload is large. In addition, during the operation and maintenance of the hydraulic system, hydraulic oil leakage is prone to polluting the environment. The car-push arm device driven by a counterweight balance and a motor reducer has a simple structure and is easy to maintain, but the lifting speed of the car-push arm is fixed and cannot be adjusted, and the lifting and lowering of the car-push arm has a large impact when starting and stopping, which can easily cause damage to the reducer and other components. Utility Model Content

[0004] The purpose of the utility model is to provide a car-push arm device driven by a variable frequency motor, which is installed on the car-push locomotive body, and uses a counterweight to balance and cooperate with the variable frequency motor drive device to achieve stepless speed regulation of the car-push arm lifting and low-impact stable lifting operation. In order to achieve the above purpose, the technical solution of the utility model is: a car-push arm device driven by a variable frequency motor, including: a counterweight device, a base, a variable frequency drive device, a car-push arm and a car body, four sets of running wheels are arranged at the lower part of the car body, and move along a fixed track; the base is arranged on the car body; the counterweight device is arranged on the base; the variable frequency drive device is arranged on the base; the car-push arm is arranged on the car body.

[0005] Furthermore, the counterweight device consists of a counterweight, a counterweight arm, a counterweight support and a counterweight pull rod; the counterweight is connected and fixed to the counterweight arm by a screw; one end of the counterweight support is connected to the counterweight arm by a pin; the other end of the counterweight support is welded to the base; one end of the counterweight pull rod is connected to the counterweight arm by a pin; the other end of the counterweight pull rod is connected to the car arm by a pin.

[0006] Furthermore, the variable frequency drive device consists of a frequency converter, a variable frequency motor, a reducer, a drive shaft, a slewing arm and a drive pull rod; the frequency converter is installed in an electrical room and connected to the variable frequency motor through a cable; the variable frequency motor is fixed on a base with a flange and a reducer housing; the variable frequency motor is axially connected to the reducer high-speed input shaft; the reducer output shaft is spline-connected to the drive shaft.

[0007] Furthermore, it also includes a braking mechanism, which is fixedly arranged on the base with two support seats; the braking mechanism consists of a brake and a brake drum; and the brake is arranged on the outside of the brake drum.

[0008] Furthermore, the driving shaft is fixedly connected to the base by two bearing seats; the swivel arm is arranged between the two bearing seats; the swivel arm is fixedly connected to the driving shaft; the braking mechanism is arranged between the reducer and the swivel arm; one end of the driving rod is connected to the swivel arm by a pin shaft; and the other end of the driving rod is connected to the car arm.

[0009] Furthermore, the car-moving arm is hingedly mounted on the car-moving machine body with two axes and swings around the hinge axis.

[0010] The beneficial effects of the utility model are as follows: the hydraulic system is removed, and a counterweight four-link balancing method is adopted in combination with a variable frequency motor drive to achieve stepless speed regulation of the lifting and lowering of the car arm and low-impact stable lifting operation. The device can achieve stepless speed regulation of the lifting and lowering of the car arm by setting the inverter parameters of the variable frequency motor; by setting the inverter soft start and stop ramp, the car arm can be started with uniform acceleration and stopped with variable frequency braking, which can minimize the inertial impact when the car arm is started and stopped, and ensure the safe and stable operation of the equipment; it is easy to maintain, has a low risk of environmental pollution, is flexible in action, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the car shifting arm device of the utility model;

[0012] Figure 2 It is a structural schematic diagram of the counterweight device of the utility model;

[0013] Figure 3 It is a structural schematic diagram of the variable frequency drive device of the utility model;

[0014] Figure 4 It is a structural schematic diagram of the brake mechanism of the utility model;

[0015] In the figure: 1, counterweight device, 2, base, 3, frequency conversion drive device, 4, car shifting arm, 5, car body, 11, counterweight, 12, counterweight arm, 13, counterweight support, 14, counterweight pull rod, 21, frequency converter, 22, frequency conversion motor, 23, reducer, 24, drive shaft, 25, brake, 26, brake drum, 27, slewing arm, 271, bearing seat, 28, drive pull rod. DETAILED DESCRIPTION

[0016] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0017] Please see attached Figure 1 -Attached Figure 4 As shown, a vehicle arm device driven by a variable frequency motor comprises: a counterweight device 1, a base 2, a variable frequency drive device 3, a vehicle arm 4 and a vehicle body 5, wherein four sets of running wheels are arranged at the lower part of the vehicle body and move along a fixed track; the base 2 is arranged on the vehicle body 5; the counterweight device 1 is arranged on the base 2; the variable frequency drive device 3 is arranged on the base 2; and the vehicle arm 4 is arranged on the vehicle body 5.

[0018] Furthermore, the counterweight device 1 is composed of a counterweight 11, a counterweight arm 12, a counterweight support 13 and a counterweight pull rod 14; the counterweight 11 is connected and fixed to the counterweight arm 12 by a screw; one end of the counterweight support 13 is connected to the counterweight arm 12 by a pin; the other end of the counterweight support 13 is welded to the base 2; one end of the counterweight pull rod 14 is connected to the counterweight arm 12 by a pin; the other end of the counterweight pull rod 14 is connected to the car arm 4 by a pin; the counterweight device forms a four-bar gravity balance structure with the car arm through the pull rod and the pin to maintain the gravity balance during the lifting and lowering process of the car arm device, and the frequency conversion drive device 3 drives the car arm to lift and lower with minimum power, while reducing the inertial impact of the car arm 4 when starting and stopping.

[0019] Furthermore, the variable frequency drive device 3 is composed of a frequency converter 21, a variable frequency motor 22, a reducer 23, a drive shaft 24, a slewing arm 27 and a drive pull rod 28; the frequency converter 21 is installed in the electrical room and connected to the variable frequency motor 22 through a cable; the variable frequency motor 22 is fixedly arranged on the base 2 with a flange and a housing of the reducer 23; the variable frequency motor 22 is axially connected to the high-speed input shaft of the reducer 23; the output shaft of the reducer 23 is spline-connected to the drive shaft 24.

[0020] Furthermore, it also includes a braking mechanism, which is fixedly arranged on the base 2 with two support seats; the braking mechanism consists of a brake 25 and a brake drum 26; the brake 25 is arranged on the outside of the brake drum 26; the preferred brake is an electric hydraulic drum brake of the Ministry of Machinery standard, which complies with JB / T6406.

[0021] Furthermore, the driving shaft 24 is fixedly connected to the base 2 by two bearing seats 271; the swivel arm 27 is arranged between the two bearing seats 271; the swivel arm 27 is fixedly connected to the driving shaft 24; the braking mechanism is arranged between the reducer 23 and the swivel arm 27; one end of the driving rod 28 is connected to the swivel arm 27 by a pin shaft; the other end of the driving rod 28 is connected to the car arm 4.

[0022] Furthermore, the car tipping arm 4 is hingedly mounted on the car tipping machine body 5 with two axes, and swings around the hinge axis to meet the operation requirements of the tipping machine system.

[0023] The working principle of this utility model:

[0024] During the operation of the car tipping machine system, after the car tipping machine reaches the car receiving position, the control system outputs a control signal, the brake of the car tipping arm device opens, the inverter output controls the frequency conversion motor to rotate, and the drive shaft is driven to rotate through the reducer, the drive shaft drives the slewing arm to swing, and the slewing arm drives the driving rod to drive the car tipping arm to fall. After reaching the deceleration position, the frequency conversion motor decelerates and brakes. After the car tipping arm falls to the stop position, the frequency conversion motor stops output, and the brake is closed to keep the car tipping arm in a fixed position. After the car tipping machine completes the work of pulling and pushing the car and reaches the arm lifting position, the frequency conversion motor rotates in the opposite direction according to the above action sequence to drive the car tipping arm to lift up, and the car tipping machine returns to the car receiving position to complete a working cycle.

[0025] In the present invention, unless otherwise clearly defined and limited, the terms "disposed", "connected" 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 or an electrical connection; 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The above description is only a preferred embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made using the contents of the present utility model specification, or directly or indirectly applied to the technical field of other related products, are also included in the patent protection scope of the present utility model.

Claims

1. A vehicle arm device driven by a variable frequency motor, characterized in that: include: A counterweight device (1), a base (2), a variable frequency drive device (3), a car-moving arm (4) and a car body (5); the lower part of the car body (5) is provided with four sets of running wheels for moving along a fixed track; the base (2) is provided on the car body (5); the counterweight device (1) is provided on the base (2); the variable frequency drive device (3) is also provided on the base (2); the car-moving arm (4) is provided on the car body (5); The counterweight device (1) is composed of a counterweight (11), a counterweight arm (12), a counterweight support (13) and a counterweight pull rod (14); the counterweight (11) is connected and fixed to the counterweight arm (12) by a screw; one end of the counterweight support (13) is connected to the counterweight arm (12) by a pin; the other end of the counterweight support (13) is welded to the base (2); one end of the counterweight pull rod (14) is connected to the counterweight arm (12) by a pin; the other end of the counterweight pull rod (14) is connected to the car shifting arm (4) by a pin; The variable frequency drive device (3) is composed of a frequency converter (21), a variable frequency motor (22), a reducer (23), a drive shaft (24), a slewing arm (27) and a drive pull rod (28); the frequency converter (21) is installed in an electrical room and connected to the variable frequency motor (22) via a cable; the variable frequency motor (22) is fixedly mounted on a base (2) via a flange and a housing of the reducer (23); the variable frequency motor (22) is axially connected to a high-speed input shaft of the reducer (23); and the output shaft of the reducer (23) is spline-connected to the drive shaft (24).

2. The vehicle arm device driven by a variable frequency motor according to claim 1, characterized in that: It also comprises a braking mechanism, which is fixedly arranged on the base (2) by a support seat; the braking mechanism is composed of a brake (25) and a brake drum (26); and the brake (25) is arranged outside the brake drum (26).

3. The vehicle arm device driven by a variable frequency motor according to claim 2, characterized in that: The driving shaft (24) is fixedly connected to the base (2) via two bearing seats (271); the slewing arm (27) is arranged between the two bearing seats (271); the slewing arm (27) is fixedly connected to the driving shaft (24); the braking mechanism is arranged between the reducer (23) and the slewing arm (27); one end of the driving rod (28) is connected to the slewing arm (27) via a pin; and the other end of the driving rod (28) is connected to the car shifting arm (4).

4. The vehicle arm device driven by a variable frequency motor according to claim 1, characterized in that: The car shifting arm (4) is hingedly mounted on the car shifting machine body (5) via two axes and swings around the hinge axis.

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