Electric power control device and crane

Abstract

The utility model provides a power control device and a crane, and the power control device comprises a device main body which is provided with a first chamber and a second chamber which are adjacent and sealed; the circuit breaker is arranged in the first cavity; and the motor controller is arranged in the second chamber and is electrically connected with the circuit breaker. Thus, the wiring harness cost between the circuit breaker and the motor controller can be reduced, the connection reliability can be improved, the circuit breaker is arranged in the closed first cavity, the protection level and the anti-condensation capability of the circuit breaker can be improved, the circuit breaker does not need to be provided with a shell box body, and the structural cost can be saved.

Description

Technical Field

[0001] The present application relates to the technical field of cranes, and in particular to an electric power control device and a crane. Background Art

[0002] The power transmission path of the plug-in truck crane is to take electricity from the power grid, pass through the cable drum, the protective circuit breaker assembly, the motor controller, the motor to the drive oil pump, and drive the hydraulic cylinder and hydraulic motor through the hydraulic valve to drive the entire loading action. The circuit breaker protects the user's electricity safety by performing hardware detection on the current and leakage current. The motor controller converts the frequency and current of the electric energy to control the motor output speed and torque required by the vehicle, and controls the crane's lifting weight and speed.

[0003] In the prior art, the motor controller and the circuit breaker are two independent components connected by a three-phase cable. The wiring harness between the circuit breaker and the motor controller is expensive, and the external wiring harness is easily damaged, affecting the user experience. At the same time, the IP protection level of the circuit breaker is low, and an additional structural box is required, which increases the cost of the housing. Utility Model Content

[0004] In view of this, the present application provides a power control device, which can solve the wiring harness cost and improve the protection performance of the circuit breaker.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A power control device, comprising:

[0007] A device body having a first chamber and a second chamber that are adjacent and sealed;

[0008] A circuit breaker is disposed in the first chamber;

[0009] The motor controller is arranged in the second chamber and is electrically connected to the circuit breaker.

[0010] Optionally, an input interface and an output interface are provided in the first chamber, the input interface is electrically connected to the circuit breaker, and the output interface is electrically connected to the motor controller.

[0011] Optionally, a partition plate is provided in the first chamber to separate the first chamber into a sealed first area and a second area, the input interface and the circuit breaker are provided in the first area, and the output interface is provided in the second area.

[0012] Optionally, a first opening through which a line can pass and a first sealing structure that closes the first opening are provided between the first area and the second chamber;

[0013] A second opening for the line to pass through and a second sealing structure for closing the second opening are provided between the second area and the second chamber.

[0014] Optionally, the circuit breaker and the motor controller, and the motor controller and the output interface are electrically connected via a copper busbar.

[0015] Optionally, a fuse device is arranged in the second area.

[0016] Optionally, a lightning arrester is provided in the first chamber, and the lightning arrester is electrically connected between the circuit breaker and the motor controller.

[0017] Optionally, the device body includes a first shell and a second shell, the first shell is connected to one side of the second shell; the first chamber is arranged in the first shell, and the second chamber is arranged in the second shell.

[0018] Optionally, the first shell and the second shell are connected by a bolt structure and a sealant structure.

[0019] A crane comprises the electric power control device as described in any one of the above items.

[0020] The power control device and crane provided by the present application can reduce the wiring harness cost between the circuit breaker and the motor controller and improve the connection reliability by integrating the circuit breaker and the motor controller in the device body. Moreover, the circuit breaker is arranged in the enclosed first chamber, which is conducive to improving the protection level and anti-condensation ability of the circuit breaker. There is no need to equip the circuit breaker with an outer shell box, which can save structural costs. The circuit breaker and the motor controller are isolated by the first chamber and the second chamber. Even if water enters the first chamber, it will not affect the motor controller in the second chamber, thereby improving the safety performance of the motor controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A structural diagram of a device body shown in some embodiments;

[0023] Figure 2 An exploded view of the device body shown in some embodiments;

[0024] Figure 3 This is a schematic diagram of the structural connections in the first chamber shown in some embodiments.

[0025] In the figure: 1. first shell; 2. second shell; 3. first opening; 4. second opening; 5. input interface; 6. circuit breaker; 7. lightning arrester; 8. output interface; 9. fuse; 11. first area; 12. second area; 13. partition plate; 21. second chamber. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] like Figure 1-Figure 3 As shown, an embodiment of the present application provides a power control device, including a device body, a circuit breaker 6 and a motor controller.

[0028] The device body has a first chamber and a second chamber 21, which are arranged adjacent to each other and sealed between the first chamber and the second chamber 21, so that the first chamber and the second chamber 21 are two unconnected closed chambers. The circuit breaker 6 is arranged in the first chamber, and the motor controller is arranged in the second chamber 21. The circuit breaker 6 and the motor controller are isolated by the first chamber and the second chamber 21. Even if water enters the first chamber, it will not affect the motor controller in the second chamber 21, thereby improving the safety performance of the motor controller.

[0029] It should be noted that the device body can be set as an integrated structure or a split structure, so that the device body can be connected as a whole to achieve the integration of the circuit breaker 6 and the motor controller.

[0030] The circuit breaker 6 is electrically connected to the motor controller. When in use, the high voltage electricity transmitted by the distribution cabinet enters the first chamber through the cable, and is input by the input port of the circuit breaker 6, and then output by the output port of the circuit breaker 6 to the motor controller in the second chamber 21. The motor controller converts the frequency and current of the electric energy, thereby controlling the motor output speed and torque required by the whole vehicle, and then controlling the lifting weight and speed of the crane.

[0031] In this way, by integrating the circuit breaker 6 and the motor controller in the device body, the wiring harness cost between the circuit breaker 6 and the motor controller can be reduced, and the connection reliability can be improved. Moreover, the circuit breaker 6 is arranged in the sealed first chamber, which is conducive to improving the protection level and anti-condensation ability of the circuit breaker 6. There is no need to equip the circuit breaker 6 with an outer shell box, which can save structural costs. The circuit breaker 6 and the motor controller are isolated by the first chamber and the second chamber 21. Even if water enters the first chamber, it will not affect the motor controller in the second chamber 21, thereby improving the safety performance of the motor controller.

[0032] In this solution, an input interface 5 and an output interface 8 are provided in the first chamber, the input interface 5 is electrically connected to the circuit breaker 6, and the output interface 8 is electrically connected to the motor controller. During installation, the input interface 5 is electrically connected to the power distribution cabinet so that the high voltage electricity of the power distribution cabinet is output to the circuit breaker 6, and then output to the motor controller through the circuit breaker 6; the output interface 8 is electrically connected to the motor so that the electric energy after the frequency conversion and current conversion by the motor controller is output to the motor to control the speed and torque of the motor.

[0033] Specifically, the input interface 5 and the output interface 8 are both configured as a three-phase copper busbar structure, which can not only improve the reliability of the circuit connection, but also reinforce the installation structure of each component.

[0034] The circuit breaker 6 and the motor controller are connected via a copper busbar, and the motor controller and the output interface 8 are connected via a copper busbar. For example, two copper busbars are respectively arranged in the first chamber and the second chamber 21, and the stud is passed through the side wall between the first chamber and the second chamber 21, and the two ends of the stud are respectively connected to the two copper busbars (the connection method can be welding or nut connection). Since the power input and output of the motor controller need to pass through the side wall between the first chamber and the second chamber 21, the copper busbar is used for electrical connection here, which is conducive to improving the reliability of the electrical connection, and can strengthen the connection between the first chamber and the second chamber 21, thereby improving the structural integrity and integrated strength of the device body.

[0035] In some embodiments, a partition plate 13 is provided in the first chamber, and the partition plate 13 is provided in the middle of the first chamber, and the first chamber is divided into a first area 11 and a second area 12, and the first area 11 and the second area 12 are not connected, that is, the first area 11 and the second area 12 form two independent and sealed areas. Among them, the input interface 5 and the circuit breaker 6 are provided in the first area 11, and the output interface 8 is provided in the second area 12, thereby isolating the input interface 5 and the output interface 8, and even if water enters the first area 11, it will not affect the output interface 8 in the second area 12, thereby improving the output stability of the motor controller.

[0036] like Figure 2As shown, a first opening 3 and a first sealing structure are provided between the first area 11 and the second chamber 21. The first opening 3 conducts the first area 11 and the second chamber 21 so that the line between the circuit breaker 6 and the motor controller (the line can be a copper bus, a stud or a cable) can pass through, thereby realizing the electrical connection between the circuit breaker 6 and the motor controller. The connection path is short, which is conducive to saving the cost of line use. The first sealing structure is used to seal the first opening 3 to isolate the first area 11 and the second chamber 21. The first sealing structure can be set as a sealing ring, a sealing plug and the like. For example, the first sealing structure is set as a sealing plug, and the stud is inserted into the sealing plug, that is, the sealing plug is wrapped around the outer periphery of the stud, and the sealing plug is inserted into the first opening 3, which can achieve both sealing and electrical connection through the stud.

[0037] Correspondingly, a second opening 4 and a second sealing structure are provided between the second region 12 and the second chamber 21. The second opening 4 conducts the second region 12 and the second chamber 21 so that the line between the output interface 8 and the motor controller (the line can be a copper bus, a stud or a cable) can pass through, thereby realizing the electrical connection between the output interface 8 and the motor controller. The connection path is short, which is conducive to saving the cost of using the line. The second sealing structure is used to seal the second opening 4 to isolate the second region 12 and the second chamber 21. The second sealing structure can be set as a sealing ring, a sealing plug and the like. For example, the second sealing structure is set as a sealing plug, and the stud is inserted into the sealing plug, that is, the sealing plug is wrapped around the outer periphery of the stud, and the sealing plug is plugged into the second opening 4, which can achieve both sealing and electrical connection through the stud.

[0038] In some preferred schemes, a lightning arrester 7 is provided in the first chamber, and the lightning arrester 7 is electrically connected between the circuit breaker 6 and the motor controller. When in use, the output port of the circuit breaker 6 is output to the lightning arrester 7, and then input to the motor controller in the second chamber 21 through the lightning arrester 7. In this way, surges can be prevented from causing damage to other devices in the circuit.

[0039] The first chamber is provided with a fuse device 9, specifically, the fuse device 9 is provided in the second area 12 and on one side of the output interface 8, and the motor controller circuit can be prevented from being damaged by overcurrent through the fuse device 9. Here, the circuit connection mode of the fuse device 9 needs to be arranged according to the actual situation, which is common knowledge in the art and is not specifically limited here.

[0040] In this solution, the device body includes a first shell 1 and a second shell 2, and the first shell 1 is connected to one side of the second shell 2, so that the device body is integrated as a whole. Among them, the first chamber is arranged in the first shell 1, and the second chamber 21 is arranged in the second shell 2. In this way, by setting the device body separately, the structure is relatively simple during processing and mold opening, which can reduce the processing difficulty and facilitate the installation of various components.

[0041] It should be noted that, in combination with the above-mentioned embodiments, the first opening 3 and the second opening 4 arranged between the first chamber and the second chamber 21 can be arranged on the first shell 1 and the second shell 2, that is, the first opening 3 and the second opening 4 are arranged on the first shell 1 and the second shell 2, and when the first shell 1 and the second shell 2 are connected, the first opening 3 on the first shell 1 is docked with and connected to the first opening 3 on the second shell 2, and the second opening 4 on the first shell 1 is docked with and connected to the second opening 4 on the second shell 2.

[0042] In a specific solution, the first shell 1 and the second shell 2 are connected by a bolt structure and a sealant structure, for example, the bolts penetrate and fix the first shell 1 and the second shell 2, and the sealant is coated on the contact surface of the first shell 1 and the second shell 2. In this way, the fixing strength is ensured while the sealing is ensured.

[0043] The embodiment of the present application provides a crane, including the power control device in the above embodiment. With such a configuration, by integrating the circuit breaker 6 and the motor controller in the main body of the device, the wiring harness cost between the circuit breaker 6 and the motor controller can be reduced, and the connection reliability can be improved. Moreover, the circuit breaker 6 is arranged in the enclosed first chamber, which is conducive to improving the protection level and anti-condensation ability of the circuit breaker 6. There is no need to equip the circuit breaker 6 with an outer shell box, which can save structural costs. The circuit breaker 6 and the motor controller are isolated by the first chamber and the second chamber 21. Even if water enters the first chamber, it will not affect the motor controller in the second chamber 21, thereby improving the safety performance of the motor controller.

[0044] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0045] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0046] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0047] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0048] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly explain the technical solutions and cannot be used to limit the scope of protection of the present application.

[0049] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A power control device, characterized in that: include: A device body having a first chamber and a second chamber that are adjacent and sealed; A circuit breaker is disposed in the first chamber; The motor controller is arranged in the second chamber and is electrically connected to the circuit breaker.

2. The power control device according to claim 1, characterized in that: An input interface and an output interface are provided in the first chamber, the input interface is electrically connected to the circuit breaker, and the output interface is electrically connected to the motor controller.

3. The power control device according to claim 2, characterized in that: A partition plate is disposed in the first chamber to divide the first chamber into a sealed first area and a second area. The input interface and the circuit breaker are disposed in the first area, and the output interface is disposed in the second area.

4. The power control device according to claim 3, characterized in that: A first opening through which a line can pass and a first sealing structure that closes the first opening are provided between the first area and the second chamber; A second opening for a line to pass through and a second sealing structure for closing the second opening are provided between the second area and the second chamber.

5. The power control device according to claim 2, characterized in that: The circuit breaker and the motor controller, and the motor controller and the output interface are electrically connected via copper busbars.

6. The power control device according to claim 3, characterized in that: A fuse device is arranged in the second area.

7. The power control device according to claim 1, characterized in that: A lightning arrester is disposed in the first chamber and is electrically connected between the circuit breaker and the motor controller.

8. The power control device according to claim 1, characterized in that: The device body includes a first shell and a second shell, wherein the first shell is connected to one side of the second shell; the first chamber is arranged in the first shell, and the second chamber is arranged in the second shell.

9. The power control device according to claim 8, characterized in that: The first shell and the second shell are connected by a bolt structure and a sealant structure.

10. A crane, characterized in that: The invention comprises the power control device as described in any one of claims 1 to 9.

Images