Loader accessory control device

Abstract

The utility model discloses a loader accessory control device which comprises a main valve, a main pump, an auxiliary pump and a controller, the main valve comprises an accessory valve group, the accessory valve group comprises an accessory control valve, the accessory control valve is provided with a first working oil port and a second working oil port, and the accessory control valve is provided with a first proportional pilot electromagnetic valve and a second proportional pilot electromagnetic valve in a matched mode. The main pump is communicated with an oil inlet of the accessory control valve through an oil way, the auxiliary pump is communicated with the oil inlet of the accessory control valve through an oil way, and the oil way is provided with a confluence electromagnetic valve. In addition, the auxiliary pump is arranged to supplement the flow pressure of the hydraulic oil, compatibility with different accessories is achieved, the auxiliary pump can be matched with the accessories with different pressures, the applicability of the loading machine is improved, and good practicability is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of loader, specifically a loader accessory control device. BACKGROUND

[0002] The skid steer loader (also known as skid steer loader, multifunctional engineering vehicle) is widely used in narrow space, complex terrain and multi-working condition scene, such as municipal engineering, port loading and unloading and forestry operation, due to its compact structure, flexible steering and rapid accessory switching capability, however, the traditional skid steer loader has significant technical bottleneck in the auxiliary operation and hydraulic pressure adaptability, which is specifically shown as follows:

[0003] 1. Complex operation mode and prominent safety hazard

[0004] The traditional auxiliary control relies on mechanical control lever or pilot valve, and the operator needs to frequently manually switch the action instruction, for example, the driver of small skid steer loader needs to stand and operate, and frequent hand switching of the control lever not only reduces the operation efficiency, but also easily leads to operation failure (such as accidental touch or hand off), increases the safety hazard, in addition, the complex operation process requires higher skills of the driver, and easily causes fatigue in long time operation, which further aggravates the risk.

[0005] 2. Insufficient hydraulic pressure adaptability

[0006] Different accessories (such as breaking hammer, forklift arm and wood clamp) have significant difference in the pressure demand of the hydraulic system, or the demand of different working tasks also causes significant difference in the pressure demand, the traditional system controls the flow by adjusting the valve opening, but cannot accurately match the hydraulic pressure demand of different accessories, which leads to system overload or power shortage, limits the function of the accessory, for example, when the high-pressure accessory is switched, the maximum power of the auxiliary cannot be exerted. INVENTION CONTENTS

[0007] The technical problem to be solved by the utility model is to provide a loader accessory control device to solve at least one of the above technical problems in view of the deficiencies of the prior art.

[0008] The technical scheme for solving the above technical problem is as follows: a loader accessory control device, comprising a main valve, a main pump, an auxiliary pump and a controller, the main valve comprises an accessory valve group, the accessory valve group comprises an accessory control valve, the accessory control valve is provided with a first working oil port and a second working oil port, the accessory control valve is provided with a first proportional pilot electromagnetic valve and a second proportional pilot electromagnetic valve in a matched mode, the main pump is communicated with the oil inlet of the accessory control valve through an oil path, the auxiliary pump is communicated with the oil inlet of the accessory control valve through an oil path, and the oil path is provided with a confluence electromagnetic valve.

[0009] The controller is electrically connected with a first dial wheel and a second dial wheel, and is electrically connected with a controller and a tool mode switching switch, and the controller is electrically connected with a sub-pump, a first proportional pilot electromagnetic valve, a second proportional pilot electromagnetic valve and a merging electromagnetic valve.

[0010] Further, the tool control valve is a three-position six-way valve.

[0011] Further, the merging electromagnetic valve is a two-position three-way reversing electromagnetic valve.

[0012] Further, the first proportional pilot electromagnetic valve, the second proportional pilot electromagnetic valve and the merging electromagnetic valve are connected with a pilot oil source.

[0013] Further, the oil line, in which the first proportional pilot electromagnetic valve, the second proportional pilot electromagnetic valve and the merging electromagnetic valve are connected with the pilot oil source, is provided with a cut-off electromagnetic valve.

[0014] Further, the first dial wheel and the second dial wheel are arranged on a boom control handle.

[0015] Further, the tool mode switching switch is a three-stage rocker switch.

[0016] Further, the central control display is a man-machine interactive display.

[0017] The utility model discloses a beneficial effect is:

[0018] The utility model discloses a beneficial effect is: ACCOUNT OF DRAWINGS

[0019] In order to make the technical scheme of the embodiments of the utility model clearer, the following will briefly introduce the drawing needed to be used in the embodiment, and it should be understood that the following drawing only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, and for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0020] Fig. 1 It is the hydraulic control connection part schematic drawing of the utility model.

[0021] Fig. 2 It is the electrical connection part schematic drawing of the utility model.

[0022] Main valve 1; accessory valve group 2; accessory control valve 3; first proportional pilot solenoid valve 4; second proportional pilot solenoid valve 5; first working oil port 6; second working oil port 7; main pump 8; sub pump 9; combined flow solenoid valve 10. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the product of the present application is usually placed during use, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", etc. do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0028] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can through intermediate medium indirectly connect, can be two element internal communication. For ordinary skilled person in the art, can understand the specific meaning of the above-mentioned term in the utility model according to specific circumstances.

[0029] Embodiment one: see Figs. 1-2 It is the utility model schematic diagram, including main valve 1, main pump 8, auxiliary pump 9, controller, main valve 1 includes tool valve group 2, main valve 1 is integrated multi-way valve including a piece control tool tool valve group 2, tool valve group 2 includes tool control valve 3, tool control valve 3 is provided with first working oil port 6, second working oil port 7, first working oil port 6, second working oil port 7 are used to connect with the working oil port on auxiliary tool, tool control valve 3 is cooperatively provided with first proportional pilot solenoid valve 4, second proportional pilot solenoid valve 5, accepts electric proportional signal and realizes the flow speed proportional regulation of tool control valve 3, main pump 8 is communicated with the oil inlet of tool control valve 3 by oil circuit, main pump 8 is always open pump as the oil source of loader actuating mechanism, for example, boom oil cylinder, bucket oil cylinder etc., auxiliary pump 9 is communicated with the oil inlet of tool control valve 3 by oil circuit and oil circuit is provided with confluence solenoid valve 10, auxiliary pump 9 is used as supplementary oil source, when auxiliary pump 9 and main pump 8 use same motor, confluence solenoid valve 10 is communicated with oil tank, makes oil pump into oil tank, when using auxiliary pump 9, by switching confluence solenoid valve 10 oil circuit, make it with tool control valve 3 communication, at this time, main pump 8, auxiliary pump 9 simultaneously oil supply to tool control valve 3, when auxiliary pump 9 and main pump 8 use two motors respectively oil supply, by controller start auxiliary pump 9 motor, switching confluence solenoid valve 10 oil supply to tool control valve 3 is carried out;

[0030] Through main pump 8, auxiliary pump 9 cooperation oil supply realizes multiple flow mode adjustable, main pump 8 output flow is 40 liters per minute, auxiliary pump 9 output flow is 20 liters per minute, can divide into three kinds: 20 liters per minute, 40 liters per minute, 60 liters per minute, using 20 liters per minute work mode, by controller control first proportional pilot solenoid valve 4, second proportional pilot solenoid valve 5 controls the output flow of tool control valve 3 at 20 liters per minute, using 40 liters per minute work mode, only main pump 8 works, realizes maximum flow for 40 liters per minute, using 60 liters per minute work mode, main pump 8, auxiliary pump 9 confluence, realizes maximum flow for 60 liters per minute, realizes the matching of different tools.

[0031] The controller is electrically connected with the first dial and the second dial, the first dial and the second dial collect proportional electric signals, the controller outputs proportional electric signals to the first proportional pilot electromagnetic valve 4 and the second proportional pilot electromagnetic valve 5 to control the flow of the implement control valve 3, and the controller is electrically connected with the controller and the implement mode switching switch, and the controller is electrically connected with the auxiliary pump 9, the first proportional pilot electromagnetic valve 4, the second proportional pilot electromagnetic valve 5 and the merging electromagnetic valve 10.

[0032] Specifically, the implement control valve 3 is a three-position six-way valve.

[0033] Specifically, the merging electromagnetic valve 10 is a two-position three-way reversing electromagnetic valve, when the auxiliary pump 9 and the main pump 8 use the same motor, the merging electromagnetic valve 10 is communicated with the oil tank to pump oil into the oil tank, when the auxiliary pump 9 is used, the oil circuit of the merging electromagnetic valve 10 is switched to be communicated with the implement control valve 3, at this time, the main pump 8 and the auxiliary pump 9 supply oil to the implement control valve 3 at the same time.

[0034] Specifically, the first proportional pilot electromagnetic valve 4, the second proportional pilot electromagnetic valve 5 and the merging electromagnetic valve 10 are connected with the pilot oil source, and the oil supplement pump of the walking motor of the loader is used as the pilot oil source.

[0035] Specifically, the oil circuit in which the first proportional pilot electromagnetic valve 4, the second proportional pilot electromagnetic valve 5 and the merging electromagnetic valve 10 are connected with the pilot oil source is provided with a cut-off electromagnetic valve, the pilot oil source is cut off through the cut-off electromagnetic valve, and user misoperation is avoided.

[0036] Specifically, the first dial and the second dial are arranged on the boom control handle, the dials are integrated on the boom handle to realize single-hand multi-action control of the implement, the frequency of hand changing is reduced, and the risk of misoperation is reduced.

[0037] Specifically, the implement mode switching switch is a three-stage rocker switch, two ends of the rocker switch are respectively an oil cylinder type implement mode and a hydraulic motor type implement mode, and a position of the rocker switch is a closed state.

[0038] Specifically, the central control display is a man-machine interactive display, and it is convenient for a user to select a flow mode.

[0039] When using this utility model, when using a hydraulic cylinder attachment, the operator switches the attachment mode switch to the hydraulic cylinder attachment mode. The controller receives an electrical signal and displays a flow mode selection interface on the central control display. The user selects the matching working mode according to the attachment. When the matching working mode is 20 liters per minute, the controller controls the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5 to control the output flow of the attachment control valve 3 at 20 liters per minute. The operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the control of the hydraulic cylinder attachment's movement.

[0040] When the matched working mode is 40 liters per minute, the operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the control of the movement of the hydraulic cylinder attachment.

[0041] When the matched working mode is 60 liters per minute, and the main pump 8 and auxiliary pump 9 operate synchronously using the same motor, the controller controls the switching of the oil circuit of the confluence solenoid valve 10, connecting it to the attachment control valve 3. At this time, the main pump 8 and auxiliary pump 9 simultaneously supply oil to the attachment control valve 3. The operator controls the first and second dials to send electrical signals, and the controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals actuate the valve core of the attachment control valve 3, thereby controlling the movement of the hydraulic cylinder attachment. When the main pump 8 and auxiliary pump 9 are driven by independent motors, the controller controls the auxiliary pump 9 motor to turn on, and the auxiliary pump 9 works. The controller controls the switching of the flow solenoid valve 10 oil circuit to connect it with the attachment control valve 3. At this time, the main pump 8 and auxiliary pump 9 simultaneously supply oil to the attachment control valve 3. The operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the control of the movement of the hydraulic cylinder attachment.

[0042] When using hydraulic motor attachments, the operator switches the attachment mode switch to the hydraulic motor attachment mode. The controller receives the electrical signal and displays the flow mode selection interface on the central control display. The user selects the matching working mode according to the attachment. When the matching working mode is 20 liters per minute, the controller controls the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5 to control the output flow of the attachment control valve 3 at 20 liters per minute. The operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the forward and reverse control of the hydraulic motor attachment.

[0043] When the matched working mode is 40 liters per minute, the operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the forward and reverse control of the hydraulic motor attachment.

[0044] When the matched working mode is 60 liters per minute, and the main pump 8 and auxiliary pump 9 operate synchronously using the same motor, the controller controls the switching of the oil circuit of the confluence solenoid valve 10, connecting it to the attachment control valve 3. At this time, the main pump 8 and auxiliary pump 9 simultaneously supply oil to the attachment control valve 3. The operator controls the first and second dials to send electrical signals, and the controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals actuate the valve core of the attachment control valve 3, thereby controlling the forward and reverse rotation of the hydraulic motor-type attachment. When the main pump 8 and auxiliary pump 9 are driven by independent motors, the controller controls the auxiliary pump 9 motor to turn on, and the auxiliary pump 9 works. The controller controls the switching of the flow solenoid valve 10 oil circuit to connect it with the attachment control valve 3. At this time, the main pump 8 and auxiliary pump 9 simultaneously supply oil to the attachment control valve 3. The operator controls the first and second dials to send electrical signals. The controller sends proportional electrical signals to the first proportional pilot solenoid valve 4 and the second proportional pilot solenoid valve 5. The first proportional pilot solenoid valve 4, the second proportional pilot solenoid valve 5, and the received proportional electrical signals push the valve core of the attachment control valve 3 to realize the forward and reverse control of the hydraulic motor attachment.

[0045] The above are merely optional embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0046] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A loader attachment control device, characterized in that: The system includes a main valve (1), a main pump (8), an auxiliary pump (9), and a controller. The main valve (1) includes an attachment valve group (2), which includes an attachment control valve (3). The attachment control valve (3) is provided with a first working port (6) and a second working port (7). The attachment control valve (3) is equipped with a first proportional pilot solenoid valve (4) and a second proportional pilot solenoid valve (5). The main pump (8) is connected to the inlet of the attachment control valve (3) through an oil circuit. The auxiliary pump (9) is connected to the inlet of the attachment control valve (3) through an oil circuit, and the oil circuit is equipped with a confluence solenoid valve (10). The controller is electrically connected to a first dial and a second dial, and is also electrically connected to a controller and an attachment mode switching switch. The controller is electrically connected to the auxiliary pump (9), the first proportional pilot solenoid valve (4), the second proportional pilot solenoid valve (5), and the confluence solenoid valve (10).

2. The loader attachment control device according to claim 1, characterized in that: The attachment control valve (3) is a three-position six-way valve.

3. The loader attachment control device according to claim 1, characterized in that: The merging solenoid valve (10) is a two-position three-way reversing solenoid valve.

4. The loader attachment control device according to claim 1, characterized in that: The first proportional pilot solenoid valve (4), the second proportional pilot solenoid valve (5), and the confluence solenoid valve (10) are all connected to the pilot oil source.

5. The loader attachment control device according to claim 4, characterized in that: The oil circuits connected to the pilot oil source of the first proportional pilot solenoid valve (4), the second proportional pilot solenoid valve (5), the confluence solenoid valve (10) are equipped with shut-off solenoid valves.

6. The loader attachment control device according to claim 1, characterized in that: The first and second dials are mounted on the boom control handle.

7. The loader attachment control device according to claim 1, characterized in that: The attachment mode switching switch is a three-position rocker switch.

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