Hydraulic system for simultaneously applying scarifier and universal shovel of bulldozer

Abstract

A hydraulic system for simultaneously applying a bulldozer scarifier and a universal shovel comprises a working valve, a scraper knife inclined oil cylinder and a scarifier oil cylinder, the scraper knife inclined oil cylinder and the scarifier oil cylinder are communicated with the working valve, a plurality of working units including scraper knife inclined units are arranged in the working valve, and the scraper knife inclined units are connected with a two-position six-way valve through a hydraulic oil way. The two-position six-way valve is communicated with the scraper knife inclined oil cylinder and the scarifier oil cylinder through hydraulic oil ways, the scraper knife and the scarifier working device share one main valve working unit, two working devices can be controlled through one working valve unit, and actions of the scraper knife and the scarifier can be achieved through the two-position six-way valve and the electromagnetic valve respectively. The problem that a universal shovel and a scarifier cannot be matched at the same time due to the fact that the whole machine space of a multi-union working valve is limited can be solved, and meanwhile the whole machine cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of bulldozer technology, and more specifically to a hydraulic system that simultaneously applies a bulldozer ripper and a universal shovel. Background Technology

[0002] For small-horsepower bulldozers and construction machinery, the space layout is compact, but there are many requirements for the operation of the working devices. Under the premise of meeting the flow and functional requirements, the working valves cannot be arranged normally. For example, the bulldozer requires both a universal shovel and a ripper. There is not enough space to arrange multiple working valves in a small space. Even if they can be arranged inside the vehicle body, they will take up too much space, which will affect other functions such as heat dissipation. Utility Model Content

[0003] One advantage of this invention is that it provides a hydraulic system for the simultaneous use of a bulldozer ripper and a universal shovel. The blade and ripper working devices share a single main valve working link, which can realize the control of two working devices by a single working valve. The blade and ripper can be operated separately by a two-position six-way valve and a solenoid valve. This solves the problem that multi-link working valves cannot be used to simultaneously match the universal shovel and ripper due to the limited space of the whole machine, and can also reduce the overall cost of the machine.

[0004] To achieve at least one of the advantages of this utility model, this utility model provides a hydraulic system for the simultaneous application of a bulldozer ripper and a universal shovel, including a working valve and a blade tilting cylinder and a ripper cylinder connected to the working valve. The working valve is internally equipped with multiple working links, including a blade tilting link. The blade tilting link is connected to a two-position six-way valve via a hydraulic circuit. The two-position six-way valve is connected to the blade tilting cylinder and the ripper cylinder via a hydraulic circuit. The two-position six-way valve is equipped with a solenoid valve. When the solenoid valve is de-energized, the two-position six-way valve operates in the left position, and the oil input from the blade tilting link in the working valve flows to the blade tilting cylinder via the left position of the two-position six-way valve. When the solenoid valve is energized, the two-position six-way valve operates in the right position, and the oil input from the blade tilting link in the working valve flows to the ripper cylinder via the right position of the two-position six-way valve.

[0005] According to one embodiment of the present invention, the working valve is provided with a working connection that includes a blade angle adjustment connection and a blade lifting and lowering connection. The working valve is connected to a blade angle adjustment cylinder and a blade lifting and lowering cylinder through a hydraulic oil circuit. The blade angle adjustment connection is connected to the blade adjustment cylinder, and the blade lifting and lowering connection is connected to the blade lifting and lowering cylinder.

[0006] According to one embodiment of the present invention, it further includes a blade hinged to a bulldozer. The two ends of the blade angle adjustment cylinder and the blade lifting and lowering cylinder are respectively hinged to the bulldozer and the blade, and are used to adjust the angle and height of the blade.

[0007] According to one embodiment of the present invention, it further includes a ripper that is hinged to the bulldozer. The two ends of the ripper cylinder are respectively hinged to the bulldozer and the ripper, and are used to drive the ripper to work.

[0008] According to one embodiment of the present invention, it also includes an oil tank, which is connected to a working valve and a two-position six-way valve through a hydraulic oil circuit to form a circuit. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the hydraulic system layout of this utility model;

[0010] In the attached diagram: 1. Two-position six-way valve, 2. Solenoid valve, 3. Blade tilting cylinder, 4. Ripper cylinder, 5. Oil tank, 6. Working valve, 7. Blade angle adjustment cylinder, 8. Blade lifting and lowering cylinder, 9. Blade angle adjustment linkage, 10. Blade lifting and lowering linkage, 11. Blade tilting linkage. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the appendix of this utility model. Figure 1 The present invention will be described in more detail below.

[0012] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0013] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0014] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0015] This utility model provides a hydraulic system for the simultaneous application of a bulldozer ripper and a universal shovel. It includes a working valve 6 and a blade tilting cylinder 3 and a ripper cylinder 4 connected to the working valve 6. The working valve 6 internally houses multiple working connections, including a blade tilting coupling 11. The blade tilting coupling 11 is connected to a two-position six-way valve 1 via a hydraulic circuit. The two-position six-way valve 1 is connected to the blade tilting cylinder 3 and the ripper cylinder 4 via a hydraulic circuit. A solenoid valve 2 is installed on the two-position six-way valve 1. When the solenoid valve 2 is de-energized, the two-position six-way valve 1 operates in the left position, and the hydraulic fluid input from the blade tilting coupling 11 in the working valve 6 flows through the left position of the two-position six-way valve 1 to the blade tilting cylinder 3. When the solenoid valve 2 is energized, the two-position six-way valve 1 operates in the right position, and the hydraulic fluid input from the blade tilting coupling 11 in the working valve 6 flows through the right position of the two-position six-way valve 1 to the blade tilting cylinder 3. The right position of the two-position six-way valve 1 is connected to the ripper cylinder 4; the working valve 6 also includes a blade angle adjustment linkage 9 and a blade lifting and lowering linkage 10. The working valve 6 is connected to the blade angle adjustment cylinder 7 and the blade lifting and lowering cylinder 8 via a hydraulic circuit. The blade angle adjustment linkage 9 is connected to the blade adjustment cylinder, and the blade lifting and lowering linkage 10 is connected to the blade lifting and lowering cylinder 8. It also includes a blade that is hinged to the bulldozer. The two ends of the blade angle adjustment cylinder 7 and the blade lifting and lowering cylinder 8 are respectively hinged to the bulldozer and the blade, and are used to adjust the angle and height of the blade. It also includes a ripper that is hinged to the bulldozer. The two ends of the ripper cylinder 4 are respectively hinged to the bulldozer and the ripper, and are used to drive the ripper to work. It also includes an oil tank 5, which is connected to the working valve 6 and the two-position six-way valve 1 via a hydraulic circuit to form a loop.

[0016] The first embodiment of this utility model is as follows:

[0017] A hydraulic system for simultaneous use of a bulldozer ripper and shovel includes a working valve 6 and a blade angle adjustment cylinder 7, a blade lifting and lowering cylinder 8, a blade tilting cylinder 3, and a ripper cylinder 4 connected to the working valve 6. An oil tank 5 is connected to the working valve 6, a two-position six-way valve 1, and each cylinder via a hydraulic circuit to form a loop. The working valve 6 internally has multiple working connections, including a blade tilting connection 11, a blade angle adjustment connection 9, and a blade lifting and lowering connection 10. The blade angle adjustment connection 9 is connected to the blade adjustment cylinder, and the blade lifting and lowering connection 10 is connected to the blade lifting and lowering cylinder 8. The blade tilting linkage 11 is connected to a two-position six-way valve 1 via a hydraulic circuit. The two-position six-way valve 1 is connected to the blade tilting cylinder 3 and the ripper cylinder 4 via a hydraulic circuit. The two-position six-way valve 1 is equipped with a solenoid valve 2. When the solenoid valve 2 is de-energized, the two-position six-way valve 1 operates in the left position. The oil input from the blade tilting linkage 11 in the working valve 6 flows through the left position of the two-position six-way valve 1 to the blade tilting cylinder 3. When the solenoid valve 2 is energized, the two-position six-way valve 1 operates in the right position. The oil input from the blade tilting linkage 11 in the working valve 6 flows through the right position of the two-position six-way valve 1 to the ripper cylinder 4.

[0018] It also includes a blade and a ripper that are hinged to the bulldozer. The blade angle adjustment cylinder 7 and the blade lifting and lowering cylinder 8 are hinged to the bulldozer and the blade at both ends, respectively, to adjust the angle and height of the blade. The ripper cylinder 4 is hinged to the bulldozer and the ripper at both ends, respectively, to drive the ripper to work.

[0019] A two-position six-way valve 1 and a solenoid valve 2 are used to enable the bulldozer to be equipped with a universal shovel and a ripper simultaneously. The blade tilting cylinder 3 and the ripper cylinder 4 share a common working link, namely the blade tilting link 11. When the solenoid valve 2 is de-energized, the two-position six-way valve 1 operates in the left position. The oil output from the working pump enters the working valve 6 through the P port, passes through the blade tilting link 11 in the working valve 6, and enters the left position of the two-position six-way valve 1 to the blade tilting cylinder 3, which can then operate. When the solenoid valve 2 is energized, the two-position six-way valve 1 operates in the right position. The oil output from the working pump enters the working valve 6 through the P port, passes through the blade tilting link 11 in the working valve 6, and then passes through the right position of the two-position six-way valve 1 to the ripper cylinder 4, which then operates.

[0020] The shovel and ripper work devices share a single working link. The shovel and ripper can be operated separately through a two-position six-way valve 1 and a solenoid valve 2. This invention can solve the problem that the multi-link working valve 6 cannot be used to simultaneously operate the universal shovel and ripper due to the limited space of the whole machine.

[0021] It should be noted that the terms "first, second, and third" used in this utility model are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0022] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A hydraulic system for simultaneous use of a bulldozer ripper and a universal shovel, characterized in that: The system includes a working valve and a blade tilting cylinder and a ripper cylinder connected to the working valve. The working valve has multiple working connections, including a blade tilting connection. The blade tilting connection is connected to a two-position six-way valve via a hydraulic circuit. The two-position six-way valve is connected to the blade tilting cylinder and the ripper cylinder via a hydraulic circuit. The two-position six-way valve is equipped with a solenoid valve. When the solenoid valve is de-energized, the two-position six-way valve operates in the left position, and the oil input from the blade tilting connection in the working valve flows to the blade tilting cylinder via the left position of the two-position six-way valve. When the solenoid valve is energized, the two-position six-way valve operates in the right position, and the oil input from the blade tilting connection in the working valve flows to the ripper cylinder via the right position of the two-position six-way valve.

2. The hydraulic system for simultaneous application of a bulldozer ripper and a universal shovel according to claim 1, characterized in that: The working valve includes a blade angle adjustment linkage and a blade lifting and lowering linkage. The working valve is connected to a blade angle adjustment cylinder and a blade lifting and lowering cylinder via a hydraulic circuit. The blade angle adjustment linkage is connected to the blade adjustment cylinder, and the blade lifting and lowering linkage is connected to the blade lifting and lowering cylinder.

3. The hydraulic system for simultaneous application of a bulldozer ripper and a universal shovel according to claim 2, characterized in that: It also includes a blade that is hinged to the bulldozer. The two ends of the blade angle adjustment cylinder and the blade lifting and lowering cylinder are respectively hinged to the bulldozer and the blade, and are used to adjust the angle and height of the blade.

4. The hydraulic system for simultaneous application of a bulldozer ripper and a universal shovel according to claim 2, characterized in that: It also includes a ripper that is hinged to the bulldozer, wherein the two ends of the ripper cylinder are hinged to the bulldozer and the ripper respectively, and are used to drive the ripper to work.

5. The hydraulic system for simultaneous application of a bulldozer ripper and a universal shovel according to claim 1, characterized in that: It also includes an oil tank, which is connected to a working valve and a two-position six-way valve via a hydraulic oil circuit to form a loop.

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