Electricity leading system of power dragging type engineering machinery and power dragging type engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a power leading system of power dragging type engineering machinery, which comprises a starting switch, a power leading device and a power leading device, a normally closed switch; a starting switch is arranged on a connecting line of the power supply module, and the normally closed switch is arranged on the connecting line between the power supply module and the starting switch; the power supply relay is electrically connected with the power supply module; the starting switch is suitable for sending a starting signal to the power supply module when the normally closed switch is closed, and the power supply module controls the power supply relay to be electrified and started in response to the starting signal; a winding drum is arranged in the tower drum, and the normally-closed switch is fixed to the top outside the tower drum; one end of the flexible cable is connected with the winding drum, the other end of the flexible cable is suitable for extending out of the tower drum and being connected with the power dragging type engineering machinery, and a trigger part is arranged on the flexible cable in the winding drum and used for triggering the normally-closed switch to be switched off when the flexible cable moves to the trigger part to make contact with or approach the normally-closed switch. And the use safety and convenience of the towing type engineering machinery are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an electric power introduction system of a towed-electric engineering machinery and the towed-electric engineering machinery. Background Art

[0002] In some operating scenarios where the operating range is basically fixed in a small area, such as scrap steel plants and docks, electric-towed construction machinery can use the power supply system to continuously supply power, so it can guarantee a longer working time than rechargeable construction machinery. In order to enable electric-towed construction machinery to move within a certain range, it is necessary to design a simple and reasonable power supply system to draw electricity from the power grid to the electric-towed construction machinery.

[0003] At present, the power supply system of towed-type engineering machinery adopts a drum-tower structure, which is costly and complex to install. In addition, since there is no sensing system, the power supply system is easily damaged when the towed-type engineering machinery exceeds the operating range. Utility Model Content

[0004] In view of this, the utility model provides a power supply system for a towed electric engineering machinery and a towed electric engineering machinery to solve the problem that the existing towed electric engineering machinery has no sensing system, which leads to easy damage to the power supply system when exceeding the operating range.

[0005] In a first aspect, the utility model provides a power supply system for a towed-type engineering machinery, comprising:

[0006] The start switch is suitable for being installed in the cab of a tractor-type engineering machinery;

[0007] Normally closed switch;

[0008] A power module, the start switch is provided on its connection line, and the normally closed switch is provided on the connection line between the power module and the start switch;

[0009] A power relay, electrically connected to the power module;

[0010] The start switch is adapted to send a start signal to the power module when the normally closed switch is closed. In response to the start signal, the power module controls the power relay to be energized and start the machine.

[0011] A tower tube, wherein a reel is provided inside, and the normally closed switch is fixed to the top outside the tower tube;

[0012] A flexible rope has one end connected to the drum and the other end suitable for extending out of the tower and connecting to the towed engineering machinery. A trigger is provided on the flexible rope located in the drum, which is used to trigger the normally closed switch to open when the flexible rope moves to the point where the trigger contacts or approaches the normally closed switch.

[0013] Beneficial effect: The power-induction system of the electric-towed engineering machinery of this scheme is provided with a trigger on the flexible rope and a normally closed switch on the top outside the tower. During the operation of the electric-towed engineering machinery, the flexible rope moves with the electric-towed engineering machinery. The distance between the trigger and the normally closed switch is pre-set as the movable distance of the electric-towed engineering machinery, that is, the operating range of the electric-towed engineering machinery is limited. When the electric-towed engineering machinery moves to the point where the trigger contacts or approaches the normally closed switch, the normally closed switch is triggered to disconnect, and the electric-towed engineering machinery stops at this time, thereby protecting the cables of the power supply system from being pulled or broken, so that the cables can automatically stop when they move to the boundary of the operating range, thereby protecting the electric-towed engineering machinery. Moreover, the power-induction system has a simple structure and low material cost. The tower of the power-induction system is easy to install without borrowing existing building beams and columns. It is applicable to many operating scenarios, especially to open outdoor areas. The operating range perception and control system has a simple principle and reliable operation; it requires few materials and has low modification costs. It improves the safety and convenience of using electric-towed engineering machinery.

[0014] In an optional implementation, the normally closed switch is a proximity switch, and the trigger member is a metal member provided on the flexible cable.

[0015] Beneficial effect: The proximity switch is a non-contact position switch, which can be attracted to metal parts. When the metal parts approach the sensing surface of the proximity switch to the action distance, the proximity switch can be activated without mechanical contact or any pressure. It has a simple principle, a simple structure and reliable operation.

[0016] In an optional implementation, the normally closed switch is a travel switch, and the trigger member is a contact rod provided on the flexible cable.

[0017] Beneficial effect: A normally closed switch can also be selected as a travel switch. The movement of the travel switch contact is not manually operated, but the contact rod such as a stop iron hits its roller to make its contact move to achieve connection or disconnection. The structure is relatively simple and the operation is reliable.

[0018] In an optional implementation, the power supply system of the towed engineering machinery further includes:

[0019] A remote control switch is connected in parallel to the circuit between the normally closed switch and the power module, and is used to send a start signal to the power module when the normally closed switch is disconnected. In response to the start signal, the power module controls the power relay to be energized and start the machine.

[0020] Beneficial effect: The start switch is used to start the towed electric engineering machinery when it initially starts working. At this time, the normally closed switch is closed. Pressing the start switch can send a start signal to the power module. In response to the start signal, the power module can control the power relay to be energized and start the machine. When the normally closed switch is disconnected and the towed electric engineering machinery stops, the start signal cannot be sent through the start switch. This solution additionally sets a remote control switch to send a start signal to the power module when the normally closed switch is disconnected. In response to the start signal, the power module controls the power relay to be energized and start the machine, so that the towed electric engineering machinery can be powered on again and then driven back to the working area.

[0021] In an optional implementation, the power supply system of the towed engineering machinery further includes:

[0022] The power tower is suitable for installation on a towed power engineering machine. One end of the flexible cable extending out of the tower is fixedly connected to the power tower. The power tower is provided with a wiring bar connected to the mains through a rectifier.

[0023] A low-voltage electric wire, one end of which is electrically connected to the terminal block, and the other end of which is suitable for being electrically connected to the normally closed switch and the low-voltage electrical system of the tow-type engineering machinery;

[0024] A high-voltage cable has one end electrically connected to the terminal block and the other end suitable for being electrically connected to a high-voltage electrical system of a towed engineering machinery.

[0025] Beneficial effect: By setting up the power-introduction tower, it is convenient for the towed electric engineering machinery to introduce mains power and rectify it to the required voltage through the rectifier. The setting of the power-introduction tower also facilitates the routing of low-voltage wires and high-voltage cables. One end of the low-voltage wires and high-voltage cables are connected to the terminal block, and the other end is connected to the tower. During the movement of the towed electric engineering machinery, the low-voltage wires and high-voltage cables move with the towed electric engineering machinery, which is convenient for the operation of the towed electric engineering machinery.

[0026] In an optional embodiment, the low-voltage electric wire and the high-voltage cable are synchronously suspended on the flexible cable between the power tower and the tower through a plurality of pulley assemblies.

[0027] Beneficial effect: By setting up multiple pulley assemblies to hang low-voltage wires and high-voltage cables, on the one hand, it is convenient to fix the cables, and on the other hand, the pulley assemblies can make the low-voltage wires and high-voltage cables automatically retract and release together with the flexible rope, so that the flexible rope will not pull the cables during movement.

[0028] In an optional embodiment, a fixed pulley is provided at the top of the tower, one end of the flexible cable is connected to the drum through the fixed pulley, and the other end of the flexible cable is connected to the top of the power tower, and the top of the fixed pulley is flush with the top of the power tower, so that the flexible cable remains horizontal between the tower and the power tower.

[0029] Beneficial effects: By setting a fixed pulley, it is easy to retract and release the flexible rope, and it plays a guiding role in the retraction and release of the flexible rope; by keeping the flexible rope horizontal, multiple pulley assemblies can be installed horizontally, avoiding the pulley assemblies from rolling randomly due to the force in the inclined direction under normal working conditions.

[0030] In an optional embodiment, the low-voltage electric wire and the high-voltage electric cable are electrically connected to the terminal block via electric slip rings, respectively.

[0031] Beneficial effect: By setting the electric slip ring, it can be ensured that the low-voltage wires and high-voltage cables are not twisted during the movement or rotation of the towed engineering machinery.

[0032] In an optional implementation, the power module includes a low-voltage power module and a controller that are electrically connected and integrated into one.

[0033] Beneficial effect: By integrating the low-voltage power module and the controller into a power module, the installation steps are simplified and the overall volume is reduced.

[0034] In a second aspect, the utility model further provides a towed electric engineering machine, comprising:

[0035] Body;

[0036] In the power-drawing system of the electric towed engineering machinery, the tower is fixed to the ground, the flexible rope connects the drum and the machine body, and the machine body stops when the trigger member contacts or approaches the normally closed switch to trigger the normally closed switch to open.

[0037] Beneficial effect: The tower is fixed to the ground as the origin of the operating range of the towed electric engineering machinery. When the towed electric engineering machinery moves to the point where the trigger member contacts or approaches the normally closed switch, the normally closed switch is triggered to open. At this time, the towed electric engineering machinery stops, thereby protecting the cables of the power supply system from being pulled or broken, so that the towed electric engineering machinery can automatically stop when it moves to the boundary of the operating range, thereby protecting the towed electric engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a schematic structural diagram of a towed-electric engineering machinery in which a power-induction system is installed on the towed-electric engineering machinery according to an embodiment of the utility model;

[0040] Figure 2 The present invention is a schematic diagram of the working principle of a power-inducing system of a towed-type engineering machinery according to an embodiment of the present utility model.

[0041] Description of reference numerals:

[0042] 1. Tower; 2. Drum; 3. Trigger; 4. Normally closed switch; 5. Soft rope; 6. Pulley assembly; 7. Low-voltage cable; 8. High-voltage cable; 9. Power bracket; 10. Machine body; 11. Start switch; 12. Remote control switch; 13. Power module; 14. Power relay. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] The existing towed-type engineering machinery power supply system adopts a reel-tower structure, which is costly and complex to install; the towed-type engineering machinery has no sensing system, which makes it easy to damage the power supply system when it exceeds the operating range. This application proposes the following solutions:

[0045] Combine the following Figure 1 to Figure 2 , describing an embodiment of the utility model.

[0046] According to an embodiment of the present utility model, on the one hand, as Figure 1 and Figure 2 As shown, a power supply system for a towed electric engineering machinery is provided, which specifically includes:

[0047] The start switch 11 is suitable for being arranged in the cab of the electric tractor engineering machinery, so that the driver can operate the start switch 11 to send a start signal conveniently.

[0048] Normally closed switch 4, as the name implies, is a switch that remains closed in the normal state and is only opened under human intervention.

[0049] The power module 13 has a start switch 11 on its connection line, and the normally closed switch 4 is arranged on the connection line between the power module 13 and the start switch 11. The power module 13 has both power supply function and control function. The power module 13 already exists in the market, and this embodiment does not improve the power module 13 itself.

[0050] The power relay 14 is electrically connected to the power module 13. Before starting the machine, the power relay 14 is in a power-off state. When starting the machine, the power relay 14 is connected with a delay to protect the electrical system.

[0051] Before starting, the normally closed switch 4 is in a closed state. The start switch 11 is suitable for sending a start signal to the power module 13 when the normally closed switch 4 is closed. In response to the start signal, the power module 13 controls the power relay 14 to be energized and start the machine. Starting here is to supply power to the electrical system of the towed electric engineering machinery, so that the towed electric engineering machinery is in a powered-on state, and the towed electric engineering machinery has the conditions for starting. At this time, the towed electric engineering machinery only needs to be powered by the low-voltage electrical system. When the towed electric engineering machinery needs to move for work, it is powered by the high-voltage electrical system.

[0052] Please refer again Figure 1 As shown, the tower 1 is provided with a drum 2 inside. It can be understood that the axis of the drum 2 is installed perpendicular to the axis of the tower 1 to prevent the drum from tilting and hitting the wall. For example, if the axis of the tower 1 is in the vertical direction, the axis of the drum 2 is in the horizontal direction. The normally closed switch 4 is fixed to the top outside the tower 1.

[0053] A flexible rope 5 is connected to the drum 2 at one end, and is suitable for extending out of the tower 1 and connecting to the electric-towed engineering machinery at the other end. A trigger 3 is provided on the flexible rope 5 located in the drum 2, which is used to trigger the normally closed switch 4 to open when the flexible rope 5 moves to the point where the trigger 3 contacts or approaches the normally closed switch 4. The trigger 3 is preferably provided on the vertical section of the flexible rope 5 in the tower 1. The distance between the trigger 3 and the normally closed switch 4 is equal to the movable distance of the electric-towed engineering machinery. For example, when the movable distance of the electric-towed engineering machinery needs to be increased, the tower 1 can be raised to increase the distance between the trigger 3 and the normally closed switch 4.

[0054] In this embodiment, the low voltage electricity uses a low voltage electricity with a voltage of 16-24V, and the high voltage electricity uses a high voltage electricity with a voltage of 500-540V.

[0055] In addition, the “flexible rope 5” referred to in this embodiment can be a slender member such as a steel wire rope, a belt, etc. that is flexible and has sufficient strength.

[0056] It can be understood that the reel 2 in this embodiment has a certain rotational force. When the flexible rope 5 is pulled outward, the reel 2 rotates in the opposite direction to release the flexible rope 5. When the flexible rope 5 is relaxed, the reel 2 can rotate forward to rewind the flexible rope 5 on the reel 2.

[0057] The power-induction system of the electric-towed engineering machinery of this embodiment is provided with a triggering member 3 on the flexible rope 5 and a normally closed switch 4 on the top outside the tower 1. During the operation of the electric-towed engineering machinery, the flexible rope 5 moves with the electric-towed engineering machinery. The distance between the triggering member 3 and the normally closed switch 4 is pre-set as the movable distance of the electric-towed engineering machinery, that is, the operating range of the electric-towed engineering machinery is limited. When the electric-towed engineering machinery moves to the point where the triggering member 3 contacts or approaches the normally closed switch 4, the normally closed switch 4 is triggered to disconnect, and the electric-towed engineering machinery is shut down. This can protect the cables of the power supply system from being pulled or broken, so that the cables can be automatically shut down when they move to the boundary of the operating range, thereby protecting the electric-towed engineering machinery. Moreover, the power-induction system has a simple structure and low material cost. The tower 1 of the power-induction system is easy to install without borrowing existing building beams and columns. It is applicable to many operating scenarios, especially to open outdoor areas. The operating range perception and control system has a simple principle and reliable operation. It requires less materials and has low modification cost. The overall safety and convenience of using electric-towed engineering machinery are improved.

[0058] In a specific embodiment, the normally closed switch 4 is a proximity switch, and the trigger member 3 is a metal member disposed on the flexible cable 5 .

[0059] A proximity switch is a non-contact position switch that can attract metal parts. When the metal parts approach the sensing surface of the proximity switch to the action distance, the proximity switch can be activated without mechanical contact or any pressure. It has a simple principle, a simple structure and reliable operation.

[0060] In another specific embodiment, the normally closed switch 4 is a travel switch, and the trigger member 3 is a contact rod disposed on the flexible cable 5 .

[0061] The normally closed switch 4 can also be a travel switch. The movement of the travel switch contact is not manual operation, but the contact rod such as a stop iron hits its roller to make its contact move to achieve connection or disconnection. The structure is relatively simple and the operation is reliable.

[0062] Since the proximity switch has better sensitivity, the metal sheet can be activated when it is close to the proximity switch. Therefore, the proximity switch is preferably used in this embodiment. The trigger member 3 is made of a metal sheet. It is convenient to fix the metal sheet on the flexible cable 5. It can be fixed in the form of bonding or fastening, which is not specifically limited here.

[0063] In a specific embodiment, the power supply system of the towed engineering machinery further includes:

[0064] The remote control switch 12 is connected in parallel to the circuit between the normally closed switch 4 and the power module 13, and is used to send a start signal to the power module 13 when the normally closed switch 4 is disconnected. In response to the start signal, the power module 13 controls the power relay 14 to be energized and start the machine.

[0065] The start switch 11 is used to start the towed electric engineering machinery when it initially starts working. At this time, the normally closed switch 4 is closed. Pressing the start switch 11 can send a start signal to the power module 13. In response to the start signal, the power module 13 can control the power relay 14 to be energized and start the machine. When the normally closed switch 4 is disconnected and the towed electric engineering machinery stops, the start signal cannot be sent through the start switch 11. In this solution, an additional remote control switch 12 is provided to send a start signal to the power module 13 when the normally closed switch 4 is disconnected. In response to the start signal, the power module 13 controls the power relay 14 to be energized and start the machine, so that the towed electric engineering machinery can be powered on again and then driven back to the working area.

[0066] In a specific embodiment, the power supply system of the towed engineering machine further includes a power supply tower, low-voltage electric wires and high-voltage cables 8 .

[0067] Specifically, the power tower is suitable for installation on a towed power engineering machine. One end of the flexible cable 5 extending out of the tower 1 is fixedly connected to the power tower. The power tower is provided with a terminal block connected to the mains through a rectifier.

[0068] One end of the low-voltage wire is electrically connected to the terminal block, and the other end is suitable for being electrically connected to the normally closed switch 4 and the low-voltage electrical system of the tow-type engineering machinery.

[0069] One end of the high-voltage cable 8 is electrically connected to the terminal block, and the other end is suitable for being electrically connected to the high-voltage electrical system of the towed engineering machinery.

[0070] In this embodiment, by setting up a power-introduction tower, it is convenient for the towed-electric engineering machinery to introduce the mains power, and rectify it to the required voltage through a rectifier. Usually, the mains power is 380V, and the voltage required by the high-voltage electrical system of the towed-electric engineering machinery is 540V, so a rectifier is required to rectify the 380V voltage to 540V; since the power-introduction tower is fixed on the towed-electric engineering machinery, it can move with the towed-electric engineering machinery. Setting up the power-introduction tower is also convenient for the routing of low-voltage wires and high-voltage cables 8. The top of the power-introduction tower has a lead-in port. One end of the low-voltage wire and high-voltage cable 8 passes through the lead-in port to connect to the terminal block, and the other end is connected to the tower 1. During the movement of the towed-electric engineering machinery, the low-voltage wire and high-voltage cable 8 move with the towed-electric engineering machinery, which is convenient for the operation of the towed-electric engineering machinery. Since the operating voltage of the high-voltage cable 8 is relatively high, in order to ensure safe use, the high-voltage cable 8 is connected to the tower 1 and is also connected to a leakage protection cabinet.

[0071] Furthermore, the low-voltage wires and high-voltage cables 8 are electrically connected to the terminal block through electric slip rings. Electric slip rings are wire connectors in rotating electromechanical systems, one end of which is connected to a stationary device and the other end is connected to a rotating device. By setting electric slip rings, it is possible to ensure that the low-voltage wires and high-voltage cables 8 are not twisted or deformed during the movement or rotation of the towed engineering machinery, thereby protecting the service life of the low-voltage wires and high-voltage cables 8.

[0072] In a specific embodiment, the low-voltage electric wire and the high-voltage cable 8 are synchronously suspended on the flexible cable 5 between the power tower and the tower 1 through a plurality of pulley assemblies 6 .

[0073] In this embodiment, a plurality of pulley assemblies 6 are provided to suspend low-voltage electric wires and high-voltage cables 8. On the one hand, it is convenient to fix the cables. On the other hand, the pulley assemblies 6 can be used to automatically retract and release the low-voltage electric wires and high-voltage cables 8 along with the flexible rope 5, so that the flexible rope 5 will not pull the cables during movement.

[0074] In a specific embodiment, a fixed pulley is provided at the top of the tower 1, one end of the flexible cable 5 is connected to the drum 2 through the fixed pulley, and the other end of the flexible cable 5 is connected to the top of the power tower. The top of the fixed pulley is flush with the top of the power tower, so that the flexible cable 5 remains horizontal between the tower 1 and the power tower.

[0075] By setting a fixed pulley, the flexible rope 5 is convenient to be retracted and released, and it plays a guiding role in the retraction and release of the flexible rope 5; by keeping the flexible rope 5 horizontal, the multiple pulley assemblies 6 can be kept installed horizontally, avoiding the pulley assemblies 6 from rolling randomly due to the force in the inclined direction under normal working conditions, thereby ensuring that the pulley assemblies 6 only move with the flexible rope 5 when it moves.

[0076] In a specific embodiment, the power module 13 includes a low-voltage power module and a controller that are electrically connected and integrated into one body. The low-voltage power module is used to supply power when the low-voltage electrical system is started, and the controller is used to control the on and off of the relay, etc. By integrating the low-voltage power module and the controller into the power module 13, the installation steps are simplified and the overall volume is reduced. The power module 13 is an existing structure and is not limited too much here.

[0077] In order to understand this solution more clearly, the working process of the power supply system of the towed engineering machinery is described as follows in combination with specific application scenarios:

[0078] For a scrap steel plant that needs to be demolished, the project volume is large and the operation time is long. It has a relatively complete power supply system, but it is relatively remote. The existing new energy engineering machinery and fuel engineering machinery cannot meet the required working hours. Therefore, the power supply system of this embodiment can be established. First, the tower 1 is fixed, the flexible rope 5 is connected, the power supply bracket 9 is fixed, etc. After everything is ready, the start switch 11 in the cab can be started. The start switch 11 sends a start signal. The power module 13 receives the signal and controls the relay to be energized. After the relay is energized, the circuit of the low-voltage electrical system is connected. The low-voltage electrical system is energized and enters the start state. At this time, the driver can operate the operating handle or button to operate, and the high-voltage electrical system supplies power during the operation; due to the limitation of the flexible rope 5, the towed electric engineering machinery can only move within a certain range, that is, the towed electric engineering machinery has a fixed operating range, and the size of the operating range is determined by the effective moving distance of the flexible rope 5, specifically by the distance of the flexible rope 5 between the trigger member 3 and the normally closed switch 4. For example, the normally closed switch 4 is a proximity switch and the trigger member 3 is a metal sheet. When the metal sheet triggers the proximity switch, the proximity switch is disconnected. At this time, the towed electric engineering machinery reaches the operating boundary and stops, thereby protecting the towed electric engineering machinery. When it is necessary to restart the machine again, the remote control switch 12 can be used to send a start signal. In response to the start signal, the power module 13 controls the power relay 14 to be energized and start the machine, so that the towed engineering machine can be powered on again and then driven back to the working area.

[0079] It can be understood that the operating range of the electric towed engineering machinery is a circular area with the tower 1 as the origin and the effective moving distance of the flexible cable 5 as the radius.

[0080] On the other hand, the utility model also provides a towed electric engineering machinery, which may be a towed electric excavator, a towed electric loader, a towed electric crane or a towed electric drilling rig, and the like.

[0081] Specifically, the electric towed engineering machinery includes:

[0082] The machine body 10 , taking a towed electric excavator as an example, the machine body 10 is the excavator body.

[0083] The power supply system of the electric towed engineering machinery has a tower 1 fixed on the ground, a flexible rope 5 connecting a drum 2 and a machine body 10, and the machine body 10 stops when the trigger member 3 contacts or approaches the normally closed switch 4 and triggers the normally closed switch 4 to open.

[0084] In this embodiment, the tower 1 is fixed to the ground as the origin of the operating range of the towed electric engineering machinery. When the towed electric engineering machinery moves to the point where the trigger member 3 contacts or approaches the normally closed switch 4, the normally closed switch 4 is triggered to open. At this time, the towed electric engineering machinery stops, thereby protecting the cables of the power supply system from being pulled or broken, so that the cables can automatically stop when they move to the boundary of the operating range, thereby protecting the towed electric engineering machinery and having promotion and application value.

[0085] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A power supply system for a towed engineering machine, characterized in that: include: A start switch (11) is suitable for being arranged in a cab of a tractor-type engineering machinery; Normally closed switch (4); A power module (13), the connection line of which is provided with the start switch (11), and the normally closed switch (4) is provided on the connection line between the power module (13) and the start switch (11); A power relay (14) electrically connected to the power module (13); The start switch (11) is adapted to send a start signal to the power module (13) when the normally closed switch (4) is in a closed state, and in response to the start signal, the power module (13) controls the power relay (14) to be energized and start the machine; A tower (1) is provided with a reel (2) inside, and the normally closed switch (4) is fixed to the top outside the tower (1); A flexible rope (5) has one end connected to the drum (2) and the other end suitable for extending out of the tower (1) and connected to the towed-type engineering machinery. A triggering member (3) is provided on the flexible rope (5) located in the drum (2) for triggering the normally closed switch (4) to open when the flexible rope (5) moves to the point where the triggering member (3) contacts or approaches the normally closed switch (4).

2. The power supply system for towed engineering machinery according to claim 1, characterized in that: The normally closed switch (4) is a proximity switch, and the trigger member (3) is a metal member provided on the flexible cable (5).

3. The power supply system for towed engineering machinery according to claim 1, characterized in that: The normally closed switch (4) is a travel switch, and the trigger member (3) is a contact rod arranged on the flexible cable (5).

4. The power supply system of a towed engineering machine according to any one of claims 1 to 3, characterized in that: Also includes: A remote control switch (12), the remote control switch (12) being connected in parallel to a circuit between the normally closed switch (4) and the power module (13), and being used for sending a start signal to the power module (13) when the normally closed switch (4) is in an open state, and in response to the start signal, the power module (13) controls the power relay (14) to be energized and start the machine.

5. The power supply system of a towed engineering machine according to any one of claims 1 to 3, characterized in that: Also includes: The power tower is suitable for installation on a towed power engineering machine, wherein one end of the flexible cable (5) extending out of the tower (1) is fixedly connected to the power tower, and the power tower is provided with a wiring bar connected to the mains via a rectifier; A low-voltage electric wire, one end of which is electrically connected to the terminal block, and the other end of which is suitable for being electrically connected to the normally closed switch (4) and the low-voltage electrical system of the towed engineering machinery; A high-voltage cable (8) has one end electrically connected to the terminal block and the other end suitable for being electrically connected to a high-voltage electrical system of a towed engineering machine.

6. The power supply system for towed engineering machinery according to claim 5, characterized in that: The low-voltage electric wire and the high-voltage cable (8) are synchronously suspended on the flexible rope (5) between the power tower and the tower (1) through a plurality of pulley assemblies (6).

7. The power supply system for towed engineering machinery according to claim 6, characterized in that: A fixed pulley is provided at the top of the tower (1), one end of the flexible rope (5) is connected to the drum (2) via the fixed pulley, and the other end of the flexible rope (5) is connected to the top of the power tower, and the top of the fixed pulley is flush with the top of the power tower, so that the flexible rope (5) remains horizontal between the tower (1) and the power tower.

8. The power supply system for towed engineering machinery according to claim 5, characterized in that: The low-voltage electric wire and the high-voltage cable (8) are electrically connected to the terminal block via electric slip rings respectively.

9. The power supply system of a towed engineering machine according to any one of claims 1 to 3, characterized in that: The power module (13) comprises a low-voltage power module and a controller which are electrically connected and integrated into one body.

10. A towed-type engineering machine, characterized in that: include: Body (10); The power supply system of a towed engineering machinery according to any one of claims 1 to 9, wherein the tower (1) is fixed to the ground, the flexible rope (5) connects the drum (2) and the machine body (10), and the machine body (10) stops when the trigger member (3) contacts or approaches the normally closed switch (4) and triggers the normally closed switch (4) to open.

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