Hydraulic motor series-parallel oil way switching device for double-rotation speed reducing mechanism of lorry-mounted crane

Abstract

The utility model discloses a hydraulic motor series-parallel oil way switching device of a double-rotation speed reducing mechanism of a lorry-mounted crane, which comprises an oil inlet oil way, an oil return oil way, a hydraulic motor I, a hydraulic motor II and an oil way switching device, and the hydraulic motor I and the hydraulic motor II are connected with the oil inlet oil way and the oil return oil way through the oil way switching device. Series connection / parallel connection switching of the first hydraulic motor and the second hydraulic motor is achieved through the oil way switching device. The oil way conversion device comprises a first electromagnetic directional valve and a second electromagnetic directional valve, the model number of the first electromagnetic directional valve is SWH-G03-B20-D24, and the model number of the second electromagnetic directional valve is SWH-G03-C2BS-D24. By arranging the oil way conversion device, the two hydraulic motors can be switched between series connection and parallel connection, so that the hydraulic motors can be selectively used according to actual requirements, the applicability is enhanced, and compared with a traditional system using two sets of systems, the hydraulic system is simple in structure, low in cost and easy and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic devices, in particular to a series-parallel oil circuit switching device for a hydraulic motor of a double-slewing speed reduction mechanism of a truck-mounted crane. Background Art

[0002] The hydraulic motor is an actuator of the hydraulic system. It converts the liquid pressure energy provided by the hydraulic pump into the mechanical energy (torque and speed) of its output shaft. Liquid is the medium for transmitting force and motion. Hydraulic motors are mainly used in injection molding machinery, ships, hoists, engineering machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, marine machinery, petrochemical industry, port machinery, etc.

[0003] Truck-mounted cranes and automobile cranes are generally equipped with multiple hydraulic motors. At present, two motors are generally connected in series or in parallel, and the two forms cannot be switched at will. In order to adapt to different occasions, multiple oil circuits containing motors need to be set up to switch the overall oil circuit, which has a complex structure and high cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a series-parallel oil circuit switching device for a hydraulic motor of a double-slewing speed reduction mechanism of a truck-mounted crane.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is a series-parallel oil circuit switching device for a double-slewing reduction mechanism of a truck-mounted crane hydraulic motor: comprising an oil inlet oil circuit, an oil return oil circuit, a hydraulic motor 1, a hydraulic motor 2, and an oil circuit conversion device, wherein the hydraulic motor 1 and the hydraulic motor 2 are connected to the oil inlet oil circuit and the oil return oil circuit through the oil circuit conversion device, and the series / parallel switching of the hydraulic motor 1 and the hydraulic motor 2 is realized through the oil circuit conversion device;

[0006] The oil circuit conversion device includes an electromagnetic reversing valve 1 and an electromagnetic reversing valve 2. The electromagnetic reversing valve 1 adopts a SWH-G03-B20-D24 model, and the electromagnetic reversing valve 2 adopts a SWH-G03-C2BS-D24 model.

[0007] The advantages of the utility model compared with the prior art are: the utility model can realize the switching between series / parallel connection of two hydraulic motors by setting an oil circuit conversion device, so that they can be selected for use according to actual needs, and the applicability is enhanced. Compared with the traditional use of two systems, the utility model has a simple structure, reduced costs, simple and convenient operation, and is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a state reference diagram of two hydraulic motors of a hydraulic motor series-parallel oil circuit switching device of a double-slewing reduction mechanism of a truck-mounted crane of the utility model when they are connected in series.

[0009] Figure 2 It is a state reference diagram of two hydraulic motors of a hydraulic motor series-parallel oil circuit switching device of a double-slewing speed reduction mechanism of a truck-mounted crane of the utility model when they are connected in parallel.

[0010] As shown in the figure:

[0011] 1. Oil inlet circuit, 2. Oil return circuit, 3. Hydraulic motor 1, 4. Hydraulic motor 2, 5. Solenoid reversing valve 1, 6. Solenoid reversing valve 2. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0013] Embodiment 1, in combination with Figure 1-2 , a series-parallel oil circuit switching device for a double-slewing reduction mechanism of a truck-mounted crane hydraulic motor, comprising an oil inlet oil circuit 1, an oil return oil circuit 2, a hydraulic motor 1 3, a hydraulic motor 2 4, and an oil circuit switching device, wherein the hydraulic motor 1 3 and the hydraulic motor 2 4 are connected to the oil inlet oil circuit 1 and the oil return oil circuit 2 through the oil circuit switching device, and the series / parallel switching of the hydraulic motor 1 3 and the hydraulic motor 2 4 is realized through the oil circuit switching device;

[0014] The oil circuit conversion device includes an electromagnetic reversing valve 1 5 and an electromagnetic reversing valve 2 6. The electromagnetic reversing valve 1 5 adopts a SWH-G03-B20-D24 model, and the electromagnetic reversing valve 2 6 adopts a SWH-G03-C2BS-D24 model.

[0015] When the utility model is implemented, as shown in the attached Figure 1 When the electromagnetic reversing valve 15 and the electromagnetic reversing valve 26 are not energized, the hydraulic motor 13 and the hydraulic motor 24 work in series; Figure 2 When the electromagnetic reversing valve 1 5 and the electromagnetic reversing valve 2 6 are energized, the hydraulic motor 1 3 and the hydraulic motor 2 4 work in parallel.

[0016] In the description of the embodiments of the present utility model, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0017] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0019] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0020] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A series-parallel oil circuit switching device for a hydraulic motor of a double-slewing reduction mechanism of a truck-mounted crane, characterized in that: The invention comprises an oil inlet circuit (1), an oil return circuit (2), a hydraulic motor 1 (3), a hydraulic motor 2 (4), and an oil circuit conversion device. The hydraulic motor 1 (3) and the hydraulic motor 2 (4) are connected to the oil inlet circuit (1) and the oil return circuit (2) through the oil circuit conversion device, and the series / parallel switching of the hydraulic motor 1 (3) and the hydraulic motor 2 (4) is realized through the oil circuit conversion device. The oil circuit conversion device comprises an electromagnetic reversing valve 1 (5) and an electromagnetic reversing valve 2 (6). The electromagnetic reversing valve 1 (5) adopts a SWH-G03-B20-D24 model, and the electromagnetic reversing valve 2 (6) adopts a SWH-G03-C2BS-D24 model.

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