Movable arm floating system of skid loader and skid loader

Abstract

The utility model provides a movable arm floating system of a skid loader and the skid loader. The movable arm floating system comprises an oil tank, a movable arm hydraulic cylinder, a reversing valve and a multi-way valve. A cylinder body of the movable arm hydraulic cylinder is used for being arranged on a skid loader body, a cylinder rod of the movable arm hydraulic cylinder is used for being connected with a movable arm of the skid loader, and the movable arm hydraulic cylinder is communicated with the oil tank and the multi-way valve through the reversing valve. When the reversing valve is in a power-on state, the movable arm hydraulic cylinder is communicated with the oil tank, and when the reversing valve is in a power-off state, the movable arm hydraulic cylinder is communicated with the multi-way valve. According to the movable arm floating system of the skid loader and the skid loader, it is guaranteed that a working device is always in a horizontal state when the skid loader goes uphill or downhill or runs on a bumpy road surface, and the stability of the working device in the working process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy machinery, in particular to a sliding loader boom floating system and a sliding loader. Background Art

[0002] A skid steer loader, also known as a skid-type loader, a multi-functional engineering vehicle, or a multi-functional engineering machine, is a wheeled special chassis device that uses the linear speed difference of the wheels on both sides to achieve vehicle steering. It uses a wheeled walking mechanism, all-wheel drive, and skid steering. It can quickly and randomly replace or attach various working devices at the work site to adapt to different working environments and work contents. The power of a skid steer loader is generally 20 to 50 kilowatts, the main machine mass is 2,000 to 4,000 kilograms, and the vehicle speed is 10 to 15 kilometers per hour. It is mainly used in places where the work site is small, the ground is uneven, and the work content changes frequently. It is suitable for infrastructure construction, industrial applications, dock loading and unloading, urban streets, residences, barns, livestock houses, airport runways, etc. It can also be used as auxiliary equipment for large-scale engineering construction machinery.

[0003] When using an existing skid loader, the driver generally manually controls its boom and working device to adjust the state of the working device. For example, when the skid loader is traveling uphill, downhill or on a bumpy road, the change in the angle of the skid loader will drive the change in the angle of the working device, and in actual work, the working device is required to always remain in a horizontal state, which increases the difficulty of the driver's operation. And when the skid loader is traveling uphill, downhill or on a bumpy road, it is difficult to ensure that its working device is always in a horizontal state, so it is difficult to ensure the working stability of the skid loader, which reduces the working efficiency. Therefore, when the skid loader is traveling uphill, downhill or on a bumpy road, how to ensure that its working device is always in a horizontal state and how to ensure the working stability of the working device are technical problems that need to be solved urgently. Utility Model Content

[0004] In view of this, the utility model provides a skid loader boom floating system and a skid loader to solve one or more technical problems existing in the prior art.

[0005] According to one aspect of the utility model, a boom floating system for a skid loader is disclosed, the boom floating system comprising an oil tank, a boom hydraulic cylinder, a reversing valve and a multi-way valve;

[0006] The cylinder body of the boom hydraulic cylinder is used to be arranged on the skid loader body, the cylinder rod of the boom hydraulic cylinder is used to be connected to the boom of the skid loader, and the boom hydraulic cylinder is connected to the oil tank and the multi-way valve through the reversing valve;

[0007] When the reversing valve is powered on, the boom hydraulic cylinder is connected to the oil tank, and when the reversing valve is powered off, the boom hydraulic cylinder is connected to the multi-way valve.

[0008] In some embodiments of the utility model, when the reversing valve is powered on, the oil inlet end and the oil outlet end of the boom hydraulic cylinder are all connected to the oil tank.

[0009] In some embodiments of the utility model, when the reversing valve is in a power-off state, the oil inlet end, the oil outlet end of the boom hydraulic cylinder and the multi-way valve are all connected.

[0010] In some embodiments of the present invention, it is characterized in that the reversing valve is a two-position six-way reversing valve.

[0011] In some embodiments of the present invention, the two-position six-way reversing valve is a solenoid valve.

[0012] In some embodiments of the present invention, the boom hydraulic cylinder is a single-piston-rod hydraulic cylinder.

[0013] According to another aspect of the utility model, a skid steer loader is further disclosed. The skid steer loader comprises the skid steer loader boom floating system as described in any one of the above embodiments.

[0014] In some embodiments of the utility model, the skid loader includes a skid loader body, a boom and a working device, one end of the boom is connected to the skid loader body, the working device is rotatably arranged at the other end of the boom, and the cylinder rod of the boom hydraulic cylinder is hingedly connected to the boom.

[0015] In some embodiments of the utility model, the boom hydraulic cylinder is located below the boom, and a cylinder rod of the boom hydraulic cylinder is hingedly connected to the middle portion of the boom.

[0016] In some embodiments of the present invention, the working device is an earth drill, a fork, a breaker hammer, a grass cutter, a forklift, a bucket or a bush saw.

[0017] In the embodiment of the utility model, the boom floating system and the skid loader of the utility model, the boom hydraulic cylinder is connected with the oil tank and the multi-way valve through the reversing valve; and when the reversing valve is powered on, the boom hydraulic cylinder is connected with the oil tank, and when the reversing valve is powered off, the boom hydraulic cylinder and the multi-way valve are connected to the structure; the structure can realize the connection between the boom hydraulic cylinder and the oil tank, or the connection between the boom hydraulic cylinder and the multi-way valve based on the reversing valve. Therefore, when the skid loader is going uphill, downhill or on a bumpy road, the boom can float due to the connection between the boom hydraulic cylinder and the oil tank, thereby ensuring that the working device connected to the boom can always be in a horizontal state, ensuring the working stability of the working device of the skid loader, and improving the working efficiency of the skid loader.

[0018] Additional advantages, purposes, and features of the present invention will be partially described in the following description, and will become partially apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the written description and its claims and the drawings.

[0019] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to the above specific description, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of a boom floating system of a sliding loader according to an embodiment of the utility model.

[0022] Figure 2 This is a schematic diagram of the state of a skid steer loader according to an embodiment of the utility model when it is at a first tilt angle during an uphill process.

[0023] Figure 3 This is a schematic diagram of the state of a skid steer loader according to an embodiment of the utility model when it is at a second inclination angle during an uphill process.

[0024] Figure 4 This is a schematic diagram of the state of a skid steer loader according to an embodiment of the utility model when it is at a first tilt angle during a downhill process.

[0025] Figure 5 This is a schematic diagram of the state of a skid steer loader according to an embodiment of the utility model when it is at a second inclination angle during a downhill process.

[0026] Figure 6 It is a schematic diagram of the state of a skid loader before and after passing through an uneven road surface according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] Oil tank 100, boom hydraulic cylinder 200, reversing valve 300, multi-way valve 400, boom 500, skid loader body 600, bucket 700 DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiment of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0030] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0031] It should be emphasized that the terms “include / comprises / has” when used herein refer to the presence of features, elements, steps or components, but do not exclude the presence or addition of one or more other features, elements, steps or components.

[0032] It should also be noted that the directional nouns in this specification are relative to the position directions shown in the drawings; if there is no special explanation, the term "connection" in this article can refer to not only direct connection, but also indirect connection with an intermediate. Direct connection means that two parts are connected without the help of an intermediate part, and indirect connection means that two parts are connected with the help of other parts.

[0033] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components.

[0034] Figure 1 FIG. 1 is a schematic structural diagram of a sliding loader boom floating system according to an embodiment of the present invention. Figure 1 As shown, the skid loader boom floating system at least includes an oil tank 100 , a boom hydraulic cylinder 200 , a reversing valve 300 and a multi-way valve 400 .

[0035] Among them, the cylinder body of the boom hydraulic cylinder 200 is used to be set on the skid loader body 600, the cylinder rod of the boom hydraulic cylinder 200 is used to be connected to the boom 500 of the skid loader, and the boom hydraulic cylinder 200 is connected with the oil tank 100 and the multi-way valve 400 through the reversing valve 300; and when the reversing valve 300 is powered on, the boom hydraulic cylinder 200 is connected with the oil tank 100, and when the reversing valve 300 is powered off, the boom hydraulic cylinder 200 is connected with the multi-way valve 400. In this embodiment, when the skid loader is in an uphill, downhill or bumpy road, the bump of the skid loader will affect the state of the working device, so that the angle of the working device will change with the bump of the skid loader. At this time, the reversing valve 300 is working in an energized state, that is, the boom hydraulic cylinder 200 and the oil tank 100 are connected, and the boom 500 of the skid loader of this structure will float with the bump of the skid loader, that is, the boom 500 of the skid loader compensates the change of the angle of the working device caused by the bump of the skid loader through floating, so that the working device of the skid loader always remains in the required state. When the skid loader works on a flat road, since the skid loader will not bump and move, the angle of the working device will not change at this time, so the reversing valve 300 can be de-energized at this time, and the boom hydraulic cylinder 200 and the multi-way valve 400 are connected, that is, the boom 500 of the skid loader can remain in the required state without floating.

[0036] In a specific embodiment, the working device of the skid loader may be a bucket 700; for example, when the skid loader is working, the bucket 700 may contain construction waste; when the skid loader needs to transport the construction waste in the bucket 700 from one location to another, if the skid loader is traveling through an uphill section at this time; for a skid loader whose boom 500 does not have a floating function, during the uphill process of the skid loader, the bucket 700 will tilt as the tilt angle of the skid loader changes. At this time, in order to ensure that the construction waste in the bucket 700 does not slide as much as possible, the hydraulic cylinder of the bucket 700 is generally manually operated to keep the bucket 700 as horizontal as possible; and the skid loader of the present application, since its boom 500 has a floating function, during the uphill process of the skid loader, the boom 500 will float as the tilt angle of the skid loader changes, and there is no need to manually adjust the angle of the bucket 700 to ensure that the bucket 700 always remains in a horizontal state. It should be understood that the working device of the skid loader in this embodiment is set as a bucket 700, which is only a preferred implementation. In other embodiments, the working device can also be an earth drill, a fork, a breaker, a grass cutter, a forklift, a grab, a bush saw, a vibratory rammer, a hydraulic shear, etc.; and because different accessories have different requirements for their status during work, when the working device in this embodiment is an accessory other than the bucket 700, the floating function of the same boom 500 can ensure that the corresponding accessories remain in the required working state.

[0037] In some embodiments of the present invention, when the reversing valve 300 is powered on, the oil inlet and outlet of the boom hydraulic cylinder 200 are connected to the oil tank 100. In this embodiment, the reversing valve 300 is powered on, and the oil inlet and outlet of the boom hydraulic cylinder 200 are connected to the oil tank 100 to realize the floating function of the boom 500. Figure 1 In this embodiment, the oil inlet and outlet of the boom hydraulic cylinder 200 are connected to the oil tank 100, which can also be understood as the oil inlet and outlet of the boom hydraulic cylinder 200 are connected to each other.

[0038] In addition, when the reversing valve 300 is in the power-off state, the oil inlet and oil outlet of the boom hydraulic cylinder 200 are all connected to the multi-way valve 400. In this embodiment, the reversing valve 300 is in the power-off state, and at this time, the oil inlet and oil outlet of the boom hydraulic cylinder 200 are both connected to the multi-way valve 400 (not shown in the figure). Further, the reversing valve 300 can be specifically a two-position six-way reversing valve, and the type of the reversing valve 300 can also be a solenoid valve. It can be understood that in this embodiment, limiting the reversing valve 300 to a two-position six-way reversing valve and setting the type of the reversing valve 300 to a solenoid valve is only a preferred embodiment. In other embodiments, other types of reversing valves 300 can also be used as long as the floating function of the boom 500 can be achieved.

[0039] In some embodiments, the boom hydraulic cylinder 200 is a single-piston rod hydraulic cylinder. When the reversing valve 300 is energized, the boom 500 realizes the floating function. At this time, the rod chamber and the rodless chamber of the single-piston hydraulic cylinder are both connected to the oil tank 100. In addition, the end of the cylinder rod of the single-piston hydraulic cylinder is hingedly connected to the boom 500. When the cylinder rod position of the single-piston hydraulic cylinder moves, the boom 500 is driven to rotate accordingly; and when the cylinder rod position of the single-piston hydraulic cylinder floats, the boom 500 is correspondingly driven to float.

[0040] Correspondingly, the utility model also discloses a skid loader, which comprises the skid loader boom floating system as described in any of the above embodiments.

[0041] Exemplarily, the skid loader includes a skid loader body 600, a boom 500 and a working device, one end of the boom 500 is connected to the skid loader body 600, the working device is rotatably arranged at the other end of the boom 500, and the cylinder rod of the boom hydraulic cylinder 200 is hingedly connected to the boom 500. It can be understood that the type of the working device is not specifically limited, and can be a soil drill, a fork, a breaker, a grass cutter, a forklift, a grab bucket or a bush saw, etc.

[0042] Further, the boom hydraulic cylinder 200 is located below the boom 500, and the cylinder rod of the boom hydraulic cylinder 200 is hingedly connected to the middle of the boom 500. Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The bottom of the boom 500 has a connecting ear, and the end of the cylinder rod of the boom hydraulic cylinder 200 is connected to the connecting ear at the bottom of the boom 500 through a rotating shaft, thereby realizing an articulated connection between the boom hydraulic cylinder 200 and the boom 500.

[0043] Figure 2 This is a schematic diagram of a skid steer loader according to an embodiment of the utility model when it is at a first tilt angle during an uphill process. Figure 3 This is a schematic diagram of a skid steer loader according to an embodiment of the utility model when it is at a second tilt angle during an uphill process; Figure 2 and Figure 3 In the figure, the working device of the skid loader is a bucket 700. It can be understood that, ideally, when the skid loader is going uphill, the bucket 700 should always be kept horizontal to prevent the objects in the bucket 700 from spilling, thereby achieving higher transportation efficiency. Figure 2 and Figure 3 It can be seen that when the floating function of the boom 500 is turned on, the bucket 700 located at the end of the boom 500 always remains in a horizontal state even if the tilt angle of the skid steer loader changes. Figure 4 and Figure 5 The schematic diagram of the skid loader at different tilt angles during the downhill process. Figure 4 and Figure 5 It can also be seen that when the floating function of the boom 500 is turned on, the bucket 700 at the end of the boom 500 always remains in a horizontal state even if the skid loader is traveling on a downhill section.

[0044] in addition, Figure 6 FIG. 1 is a schematic diagram of a skid loader according to an embodiment of the utility model before and after passing through an uneven road surface, from Figure 6 It can be seen that when the skid loader of the present application travels on an uneven or bumpy road surface, the angle between the boom and the skid loader body changes with the ups and downs of the skid loader body, so that the distance between the working device at the left end of the boom and the ground remains unchanged, that is, the distance between the working device at the end of the boom and the horizontal plane will not change with the ups and downs of the skid loader body, and thus the working device at the end of the boom remains at a constant height.

[0045] Therefore, when the skid loader in the embodiment of the utility model is traveling on uphill, downhill and bumpy roads, the driver does not need to manually adjust the boom 500 or the bucket 700. The horizontal position of the bucket 700 can be automatically adjusted and calibrated based on the floating of the boom 500, thereby ensuring the stability of the working device during the working process and improving work efficiency.

[0046] To summarize, the skid loader boom floating system of the present application realizes the telescopic movement of the boom hydraulic cylinder 200 by energizing and de-energizing the reversing valve 300. When telescopic movement is required, the reversing valve 300 is energized, and the reversing valve 300 connects the oil tank 100 and the boom hydraulic cylinder 200 to realize the floating of the boom 500; when the boom hydraulic cylinder 200 does not need to be telescoped, the reversing valve 300 is de-energized, and the reversing valve 300 disconnects the oil tank 100 and the boom hydraulic cylinder 200 to maintain a constant pressure in the oil tank 100.

[0047] Through the above embodiments, it can be found that the skid loader boom floating system can make the skid loader's boom work in a floating mode, that is, as the skid loader bumps, the boom will automatically adjust to a suitable position, so that the working device remains in a required state, thereby improving working stability and work efficiency. In addition, the skid loader adopting the boom floating system has its working device floating as the boom floats, which can make the vehicle hydraulic system more stable and less affected by the external environment, and can prevent the skid loader from stalling or rolling over, thereby improving operational safety; and when the skid loader is driving uphill, downhill or on a bumpy road, the driver does not need to adjust the position and state of the working device, so it will not distract the driver's attention, thereby improving driving safety.

[0048] In the present invention, features described and / or illustrated for one embodiment may be used in the same manner or in a similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0049] The above-listed embodiments show and describe the basic principles and main features of the utility model, but the utility model is not limited to the above-mentioned embodiments. Any modifications, equivalent changes and modifications made to the utility model by those skilled in the art without making any creative work should fall within the scope of protection of the technical solution of the utility model.

Claims

1. A skid loader boom floating system, characterized in that: The boom floating system includes an oil tank, a boom hydraulic cylinder, a reversing valve and a multi-way valve; The cylinder body of the boom hydraulic cylinder is used to be arranged on the skid loader body, the cylinder rod of the boom hydraulic cylinder is used to be connected to the boom of the skid loader, and the boom hydraulic cylinder is connected to the oil tank and the multi-way valve through the reversing valve; When the reversing valve is powered on, the boom hydraulic cylinder is connected to the oil tank, and when the reversing valve is powered off, the boom hydraulic cylinder is connected to the multi-way valve.

2. The skid loader boom floating system according to claim 1, characterized in that: When the reversing valve is powered on, the oil inlet and outlet ends of the boom hydraulic cylinder are connected to the oil tank.

3. The skid loader boom floating system according to claim 2, characterized in that: When the reversing valve is in a power-off state, the oil inlet end, the oil outlet end of the boom hydraulic cylinder and the multi-way valve are all connected.

4. The skid loader boom floating system according to any one of claims 1 to 3, characterized in that: The reversing valve is a two-position six-way reversing valve.

5. The skid loader boom floating system according to claim 4, characterized in that: The two-position six-way reversing valve is a solenoid valve.

6. The skid loader boom floating system according to claim 1, characterized in that: The boom hydraulic cylinder is a single-piston-rod hydraulic cylinder.

7. A skid steer loader, characterized in that: The skid steer loader comprises a skid steer loader boom floating system according to any one of claims 1 to 6.

8. The skid steer loader according to claim 7, characterized in that: The skid loader comprises a skid loader body, a boom and a working device, one end of the boom is connected to the skid loader body, the working device is rotatably arranged at the other end of the boom, and the cylinder rod of the boom hydraulic cylinder is hingedly connected to the boom.

9. The skid steer loader according to claim 8, characterized in that: The boom hydraulic cylinder is located below the boom, and a cylinder rod of the boom hydraulic cylinder is hingedly connected to the middle portion of the boom.

10. The skid steer loader according to claim 9, characterized in that: The working device is an earth drill, a fork, a breaker hammer, a grass cutter, a forklift, a grab bucket or a bush saw.

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