Charging plug, charging control circuit and AGV

Abstract

The utility model discloses a charging plug, a charging control circuit and an AGV, the charging plug comprises at least one group of contacts and an insulation housing used for fixing the contacts, and each group of contacts comprises at least one detection contact, at least two anode charging contacts used for parallel connection and at least two cathode charging contacts used for parallel connection. The charging docking reliability is improved, and meanwhile, the load capacity can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic guided vehicles, in particular to a charging plug, a charging control circuit and an AGV. Background Art

[0002] Automated Guided Vehicle (AGV), also known as automatic guided transporter or automatic guided vehicle, is an industrial vehicle that loads goods automatically or manually, drives automatically along a set route or tows a cargo trolley to a designated location, and then loads and unloads goods automatically or manually.

[0003] The charging circuit is an important part of the AGV. Using contact charging is one of the ways to charge the AGV. The AGV uses contacts to charge. Generally, one contact is set on the charging plug at the power supply end and one contact is set on the charging plug at the charging device end. However, since the AGV is generally charged autonomously, the charging reliability and load capacity of the above structure need to be improved. Utility Model Content

[0004] The purpose of the utility model is to overcome the problems of poor charging reliability and load capacity of existing self-charging AGVs, and to provide a charging plug, a charging control circuit and an AGV, which can further improve the load capacity while improving the reliability of charging docking.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a charging plug in a first aspect, comprising at least one set of contacts and an insulating shell for fixing the contacts.

[0007] Each group of contacts includes at least one detection contact, at least two positive charging contacts for parallel connection, and at least two negative charging contacts for parallel connection.

[0008] A second aspect of the present invention provides a charging circuit, comprising a charging plug, a power supply, and a charging control circuit connected between the charging plug and the power supply, wherein the charging plug is a charging plug as described in the first aspect;

[0009] One end of the positive charging contact of each set of contacts is connected to the charging control circuit, and one end of the negative charging contact of each set of contacts is connected to the charging control circuit;

[0010] One end of the detection contact of each group of contacts is connected to the charging control circuit so that the charging control circuit can control the on-off state of the circuit where the positive charging contact and the negative charging contact are located according to the on-off state of the circuit where the detection contact is located.

[0011] The third aspect of the utility model provides an AGV, comprising a frame assembly, a control assembly installed in the frame assembly, and a wheel assembly installed on the frame assembly and connected to the control assembly by signal, wherein the control assembly is a charging circuit described in the third aspect.

[0012] The utility model has the following advantages:

[0013] In the present solution, each group of contacts includes at least two positive charging contacts and at least two negative charging contacts. When in use, all positive charging contacts of each group of contacts are connected in parallel, and all negative charging contacts are connected in parallel, which can further improve the load capacity while improving the reliability of charging docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention 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 some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the first structure of the charging plug of the utility model;

[0016] Figure 2 This is a schematic diagram of the second structure of the charging plug of the utility model;

[0017] Figure 3 This is the schematic diagram of the charging circuit;

[0018] Figure 4 is a specific circuit schematic diagram of a charging control circuit;

[0019] Figure 5 For Figure 4 The circuit schematic diagram of the power supply device-side circuit paired with the charging control circuit shown. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. 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 first aspect of the utility model provides a charging plug, which can be used as a plug at the power supply device end or a plug at the power receiving device end. Figure 1 As shown, the charging plug includes at least one group of contacts and an insulating shell for fixing the contacts, wherein each group of contacts includes at least one detection contact, at least two positive charging contacts for parallel connection, and at least two negative charging contacts for parallel connection.

[0027] The detection contacts of each group of contacts serve as communication contacts to detect whether the plugs of the power supply device and the power receiving device are reliably connected. At least one detection contact is provided. Of course, for the reliability of detection, multiple detection contacts can be provided, such as 2, 3 or more.

[0028] Each group of contacts includes at least two positive charging contacts and at least two negative charging contacts. When in use, all positive charging contacts of each group of contacts are connected in parallel, and all negative charging contacts are connected in parallel, which can further improve the load capacity while improving the reliability of charging docking. The number of positive charging contacts and negative charging contacts in each group of contacts can be 2, 3, 4 or even more. The more the number, the stronger the reliability and load capacity. Of course, to a certain extent, the more the number, the larger the size and the higher the cost. It is preferably set to 2 or 3.

[0029] In a single-power-source powered device, each charging plug only needs to be provided with one set of contacts; in a dual-power-source powered device, the charging plug can be provided with two sets of contacts at the same time to meet the requirement of charging two power sources simultaneously.

[0030] There are various ways to implement the insulating shell. To facilitate plugging and unplugging, especially in automatic charging scenarios, the insulating shell includes an insulating fixing portion 61 provided with a charging slot and used to fix the contact, and a guide portion 62 provided at the notch of the charging slot.

[0031] There are many ways to implement the guide part, see Figure 1 , a guiding slope structure may be provided inside the notch of the charging slot; or, referring to Figure 2 A guide slope structure is provided on the outer side wall of the guide portion 62 .

[0032] The positive charging contact 64, the negative charging contact 65, and the detection contact may be a fixed structure or an elastic probe structure. Figure 1 As shown, an elastic probe structure is adopted; Figure 2 As shown, a fixed structure is adopted.

[0033] Based on the charging contact of the first aspect, the second aspect of the utility model provides a charging control circuit, such as Figure 3 As shown, it includes a charging plug, a power supply and a charging control circuit connected between the charging plug and the power supply, the charging plug includes a first charging plug, and the first charging plug is a charging plug described in the first aspect; one end of the positive charging contact of each group of contacts is connected to the charging control circuit, and one end of the negative charging contact of each group of contacts is connected to the charging control circuit; one end of the detection contact of each group of contacts is connected to the charging control circuit so that the charging control circuit can control the on-off of the circuit where the positive charging contact and the negative charging contact are located according to the on-off status of the circuit where the detection contact is located.

[0034] There are many implementations of the charging control circuit. For example, refer to Figure 4 The charging control circuit includes a first relay and a controller connected to the detection contact 63 and controlling the working state of the first relay according to the detection contact output signal; the negative pole of the power supply is connected to one end of the negative charging contact 65 and then connected to the positive charging contact 64 at both ends of the output circuit side of the first relay.

[0035] By adopting the above circuit, the first relay realizes the on-off control of the power charging circuit. When the controller detects a signal on the detection contact 63, it switches the first relay to the working state, and the power is charged to ensure that the contact pin is not charged in the non-charging state, thereby improving safety.

[0036] Specifically, the controller can be implemented using intelligent control units such as MCU and PLC, which are not described in detail in this solution. It should be noted that, especially since there are many existing mature chips and circuits to choose from, the specific selection of the controller and its circuit structure are not given in the diagram of this solution.

[0037] In order to improve the safety of power supply charging, a safety circuit is connected between the first relay and the power supply.

[0038] In order to further realize multiple modes and backup charging, the charging plug includes a second charging plug, the second charging plug is connected to the power supply and the insurance circuit. The second charging plug can adopt the same structure as the first charging plug, or other structures. The second charging plug is Figure 3 Manual charging port in.

[0039] For example, Figure 4 A specific implementation of a charging control circuit is given. Since two power supplies can be set in the AGV car, Figure 4 Two examples of charging control circuits are given, that is, charging control of two power supplies is realized.

[0040] Among them, the two power supplies include the left 48 power supply and the right 48 power supply, the controller interface 1 and the controller interface 2 are respectively connected to the controller, and the insurance circuit adopts a 10A insurance circuit; the receiving head is the first charging plug. The first relay is plugged into the intermediate relay seat J3.

[0041] C11, C12, C21, C22, C31, C32, ..., C81, C82 are all connectors, where CX1 and CX2 represent that two connectors have a connection relationship, and X is a natural number from 1 to 8.

[0042] The circuit on the power supply device side that matches this circuit is as follows: Figure 5 Just as shown.

[0043] The third aspect of the utility model provides an AGV, comprising a frame assembly, a control assembly installed in the frame assembly, and a wheel assembly installed on the frame assembly and connected to the control assembly by signal, wherein the control assembly is a charging circuit described in the third aspect.

[0044] The wheel assembly is driven by a motor, refer to Figure 4 , the motor is one of the loads on the left and the load on the right.

[0045] Other circuits of AGV such as Figure 3 , 4 As shown, relay J1 and relay J2 respectively realize the on-off control of the drive circuits of the motors on both sides, and the start-stop button and the emergency stop button realize the motor control. The external high-power controller can be a drive motor, etc. The spare physical control button realizes the start-stop control of the AGV. The shunt load is the power load on the AGV, including MCU, ultrasonic radar, display screen, etc.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A charging plug, comprising at least one set of contacts and an insulating shell for fixing the contacts, characterized in that: Each group of contacts includes at least one detection contact (63), at least two positive charging contacts (64) for parallel connection, and at least two negative charging contacts (65) for parallel connection.

2. A charging plug according to claim 1, characterized in that: The contacts are in two groups.

3. A charging plug according to claim 1, characterized in that: The insulating housing comprises an insulating fixing portion (61) provided with a charging slot and used to fix a contact, and a guiding portion (62) provided at a notch of the charging slot.

4. A charging plug according to claim 1, characterized in that: Each set of contacts includes two positive charging contacts (64) and two negative charging contacts (65).

5. A charging control circuit, comprising a charging plug, a power source, and the charging control circuit connected between the charging plug and the power source, wherein the charging plug comprises a first charging plug, characterized in that: The first charging plug is a charging plug according to any one of claims 1 to 4; One end of the positive charging contact (64) of each contact group is connected to the charging control circuit, and one end of the negative charging contact (65) of each contact group is connected to the charging control circuit; One end of the detection contact (63) of each group of contacts is connected to a charging control circuit so that the charging control circuit can control the on / off state of the circuit where the positive charging contact (64) and the negative charging contact (65) are located according to the on / off state of the circuit where the detection contact is located.

6. A charging control circuit according to claim 5, characterized in that: The charging control circuit comprises a first relay and a controller connected to the detection contact (63) and controlling the working state of the first relay according to an output signal of the detection contact; The negative pole of the power source is connected to one end of the negative pole charging contact (65) and then connected to the two ends of the output circuit side of the first relay respectively with the positive pole charging contact (64).

7. A charging control circuit according to claim 6, characterized in that: A safety circuit is connected between the first relay and the power supply.

8. A charging control circuit according to claim 7, characterized in that: The charging plug includes a second charging plug, and the second charging plug is connected to both ends of the power supply and the insurance circuit.

9. An AGV, comprising a frame assembly, a control assembly mounted in the frame assembly, and a wheel assembly mounted on the frame assembly and connected to the control assembly by signal, characterized in that: The control component is a charging control circuit as described in any one of claims 5 to 7.

Images