Hydraulic control device of flat car

Abstract

The utility model provides a hydraulic control device of a flat car. The hydraulic control device of the flat car comprises a main controller, a hydraulic pump, a transfer case, two direct-current servo motors and two motor drivers. The transfer case is provided with two input shafts and an output shaft, the two direct-current servo motors are in transmission connection with the two input shafts of the transfer case respectively, and the hydraulic pump is in transmission connection with the output shaft of the transfer case. The two direct-current servo motors are electrically connected with the two motor drivers respectively, and the two motor servo drivers are electrically connected with the main controller; the main controller simultaneously sends control instructions to the two motor drivers so as to control the two direct-current servo motors to synchronously rotate; in the utility model, the main controller simultaneously sends the control instructions to the two motor drivers to control the two direct-current servo motors to synchronously rotate, and the two direct-current servo motors drive the hydraulic pump to rotate through the transfer case, so that compared with a single direct-current servo motor for driving the hydraulic pump to rotate, the input power of the hydraulic pump can be improved; and stable operation of the flat car is maintained.

Description

Technical Field

[0001] The utility model belongs to the technical field of flatbed vehicles, and in particular relates to a hydraulic control device for a flatbed vehicle. Background Art

[0002] Current heavy-duty flatbed trucks usually use diesel engines as power units, which have the following defects:

[0003] (1) The cost and maintenance cost are high, which increases the manufacturing cost and maintenance cost of the flatbed truck;

[0004] (2) The operating noise is high during operation, the exhaust gas affects the environment, and the stability and accuracy are not high;

[0005] (3) The diesel engine is large in size and requires a large space for installation.

[0006] Replacing diesel engines with DC servo motors can solve the above problems to a certain extent. However, the output power of DC servo motors is relatively small. When used in heavy-duty flatbed trucks, it is easy to cause insufficient power, making it difficult to ensure stable operation of heavy-duty hydraulic flatbed trucks.

[0007] Therefore, it is necessary to design a flatbed truck hydraulic control device that uses dual DC servo motors to drive the hydraulic pump, which can increase the input power of the hydraulic pump and maintain the smooth operation of the flatbed truck to solve the current technical problems. Summary of the Invention

[0008] In view of the deficiencies in the prior art, the utility model provides a hydraulic control device for a flatbed truck which adopts dual DC servo motors to drive a hydraulic pump, thereby increasing the input power of the hydraulic pump and maintaining the smooth operation of the flatbed truck.

[0009] The technical solution of the utility model is: a hydraulic control device for a flatbed truck, comprising: a main controller, a hydraulic pump, a transfer case, two DC servo motors, and two motor drivers; the transfer case has two input shafts and one output shaft, the two DC servo motors are respectively connected to the two input shafts of the transfer case, and the hydraulic pump is connected to the output shaft of the transfer case; the two DC servo motors are respectively electrically connected to the two motor drivers, and the two motor drivers are both electrically connected to the main controller; the main controller simultaneously sends control instructions to the two motor drivers to control the two DC servo motors to rotate synchronously.

[0010] The oil inlet and oil outlet of the hydraulic pump are respectively provided with an oil inlet pressure sensor and an oil outlet pressure sensor; the oil inlet pressure sensor and the oil outlet pressure sensor are connected to the main controller.

[0011] The main controller detects the pressure difference between the oil inlet and oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor, and adjusts the opening size of the hydraulic pump in real time to keep the hydraulic pump at maximum power output.

[0012] The flatbed truck hydraulic control device also includes a cooling fan and a temperature sensor; the temperature sensor is arranged on the hydraulic oil tank for detecting the temperature of the hydraulic oil; the cooling fan is used to reduce the temperature of the hydraulic oil of the entire vehicle; the temperature sensor and the cooling fan are both connected to the main controller.

[0013] The flatbed truck hydraulic control device also includes a battery pack, which is used to power the entire heavy-duty hydraulic flatbed truck.

[0014] The battery pack is composed of 48 2V lead-acid batteries connected in series, and the battery pack is arranged in the middle of the body of the heavy-duty hydraulic flatbed truck.

[0015] The two DC servo motors are both 20kw DC servo motors.

[0016] The main controller is an EPEC4602 controller.

[0017] The beneficial effects of the present invention are as follows: In the present invention, the main controller controls the synchronous rotation of the two DC servo motors by sending control instructions to the two motor drivers at the same time. The two DC servo motors drive the hydraulic pump to rotate through the transfer case. Compared with a single DC servo motor driving the hydraulic pump to rotate, the input power of the hydraulic pump can be increased to maintain the smooth operation of the heavy-loaded flatbed truck. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a principle block diagram of the hydraulic control device for a flatbed truck in this utility model.

[0019] Figure 2 This is a schematic diagram of the connection structure between the hydraulic pump and two DC servo motors in the utility model.

[0020] Figure 3 This is a principle block diagram of the temperature sensor and the cooling fan in this utility model. DETAILED DESCRIPTION

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and does not constitute any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0022] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. Terms such as "include" or "comprising" mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0023] like Figure 1 and 2 As shown, the hydraulic control device of the flatbed truck includes: a main controller 1, a hydraulic pump 7, a transfer case 6, two DC servo motors 3, and two motor drivers 2; the transfer case 6 has two input shafts and one output shaft, the two DC servo motors 3 are respectively connected to the two input shafts of the transfer case 6, and the hydraulic pump 7 is connected to the output shaft of the transfer case 6; the two DC servo motors 3 are respectively electrically connected to the two motor drivers 2, and the two motor drivers 2 are both electrically connected to the main controller 1; the main controller 1 simultaneously sends control instructions to the two motor drivers 2 to control the two DC servo motors 3 to rotate synchronously; in this embodiment, the main controller 1 controls the two DC servo motors 3 to rotate synchronously by sending control instructions to the two motor drivers 2 at the same time, and the two DC servo motors 3 drive the hydraulic pump 7 to rotate through the transfer case 6. Compared with the single DC servo motor 3 driving the hydraulic pump 7 to rotate, the input power of the hydraulic pump can be increased to maintain the smooth operation of the heavy-loaded flatbed truck.

[0024] In some embodiments, the oil inlet 701 and the oil outlet 702 of the hydraulic pump 7 are respectively provided with an oil inlet pressure sensor 5 and an oil outlet pressure sensor 4, the oil inlet pressure sensor 5 is used to detect the internal pressure of the oil inlet 701, and the oil outlet pressure sensor 4 is used to detect the internal pressure of the oil outlet 702; the oil inlet pressure sensor 5 and the oil outlet pressure sensor 4 are connected to the main controller 1.

[0025] In some embodiments, the main controller 1 detects the pressure difference between the oil inlet 701 and the oil outlet 702 of the hydraulic pump 7 through the oil inlet pressure sensor 5 and the oil outlet pressure sensor 4, and adjusts the opening size of the hydraulic pump 7 in real time to enable the hydraulic pump 7 to maintain maximum power output, thereby improving the working efficiency of the heavy-loaded hydraulic flatbed truck and enabling the vehicle to always maintain the best working state; specifically, the opening size of the hydraulic pump can be controlled by a proportional valve, and the main controller 1 controls its opening by outputting a control signal to the proportional valve.

[0026] In some embodiments, as Figure 3 As shown, the hydraulic control device of the flatbed truck also includes a cooling fan 11 and a temperature sensor 10; the temperature sensor 10 is arranged on the hydraulic oil tank for detecting the temperature of the hydraulic oil; the cooling fan 11 is used to reduce the temperature of the hydraulic oil of the entire vehicle; the temperature sensor 10 and the cooling fan 11 are both connected to the main controller 1; specifically, the cooling fan 11 is installed near the position of the hydraulic pump, and the cooling fan 11 dissipates heat from the hydraulic oil temperature to provide safe operation guarantee for the hydraulic system of the entire vehicle, and the temperature sensor 10 collects the hydraulic oil temperature to control the start and stop of the cooling fan 11.

[0027] In some embodiments, the hydraulic control device for a flatbed truck further includes a battery pack for powering the entire heavy-duty hydraulic flatbed truck. Specifically, the battery pack comprises 48 2V lead-acid batteries connected in series and arranged in the middle of the heavy-duty hydraulic flatbed truck. The battery pack outputs 96V DC power and has a capacity of 1000AH. In some embodiments, as a specific embodiment of the two DC servo motors 3, each of the two DC servo motors 3 is a 20kW DC servo motor.

[0028] In some embodiments, as a specific implementation of the main controller 1, the main controller 1 is an EPEC4602 controller.

[0029] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details well known in the art have not been described. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions disclosed herein.

[0030] The above-described embodiments represent only some of the embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present utility model, and these modifications and improvements fall within the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model patent shall be based on the appended claims.

Claims

1. A hydraulic control device for a flatbed truck, characterized in that: include: Main controller, hydraulic pump, transfer case, two DC servo motors, two motor drivers; The transfer case has two input shafts and one output shaft, the two DC servo motors are respectively connected to the two input shafts of the transfer case, and the hydraulic pump is connected to the output shaft of the transfer case; The two DC servo motors are electrically connected to the two motor drivers respectively, and the two motor drivers are electrically connected to the main controller; The main controller sends control instructions to the two motor drivers simultaneously to control the two DC servo motors to rotate synchronously.

2. The hydraulic control device for a flatbed truck according to claim 1, characterized in that: The oil inlet and oil outlet of the hydraulic pump are respectively provided with an oil inlet pressure sensor and an oil outlet pressure sensor; The oil inlet pressure sensor and the oil outlet pressure sensor are connected to the main controller.

3. The hydraulic control device for a flatbed truck according to claim 2, characterized in that: The main controller detects the pressure difference between the oil inlet and oil outlet of the hydraulic pump through the oil inlet pressure sensor and the oil outlet pressure sensor, and adjusts the opening size of the hydraulic pump in real time to keep the hydraulic pump at maximum power output.

4. The hydraulic control device for a flatbed truck according to claim 1, characterized in that: It also includes a cooling fan and a temperature sensor; the temperature sensor is arranged on the hydraulic oil tank for detecting the temperature of the hydraulic oil; the cooling fan is used to reduce the temperature of the hydraulic oil of the entire vehicle; the temperature sensor and the cooling fan are both connected to the main controller.

5. The hydraulic control device for a flatbed truck according to claim 1, characterized in that: It also includes a battery pack, which is used to power the entire heavy-duty hydraulic flatbed truck.

6. The hydraulic control device for a flatbed truck according to claim 5, characterized in that: The battery pack is composed of 48 2V lead-acid batteries connected in series, and the battery pack is arranged in the middle of the body of the heavy-duty hydraulic flatbed truck.

7. The hydraulic control device for a flatbed truck according to claim 1, characterized in that: The two DC servo motors are both 20kw DC servo motors.

8. The hydraulic control device for a flatbed truck according to claim 1, characterized in that: The main controller is an EPEC4602 controller.

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