Oil passage assembly for a hydraulic transmission and hydraulic transmission

Abstract

The application discloses an oil circuit assembly for a hydraulic transmission device and the hydraulic transmission device, and belongs to the technical field of hydraulic transmission. The oil circuit assembly comprises an oil tank and a reversing valve. The oil tank stores driving oil. The reversing valve is used for switching the flow direction of the driving oil. The oil tank is provided with a side wall. The side wall is provided with a valve rod hole, a driving oil input channel, a first channel and a second channel. The valve rod hole penetrates through the side wall. The reversing valve is slidingly arranged in the valve rod hole. The driving oil input channel, the first channel and the second channel are all in communication with the valve rod hole. The driving oil input channel can input the driving oil pressurized by a motor. The oil circuit assembly provided by the application can switch the reversing valve between a first position and a second position. The first channel and the second channel can be in communication with the driving oil input channel or the oil tank. An additional oil return channel is not needed. The number of oil circuit channels can be reduced. The oil circuit channel of the transmission device is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic transmission, in particular to an oil circuit assembly for a hydraulic transmission device and the hydraulic transmission device. BACKGROUND

[0002] The existing hydraulic transmission device, such as a double-acting prop lifter, a shearing device, and an expander, is provided with independent opening oil circuit and closing oil circuit. When the driving oil is input into the working device from the opening oil circuit, the driving oil can make the working device open. When the driving oil is input into the working device from the closing oil circuit, the driving oil can make the working device close. Since the opening oil circuit and the closing oil circuit are independently provided, the driving oil input into the working device from the opening oil circuit or the closing oil circuit also needs to be provided with the corresponding return oil passage corresponding to the opening oil circuit and the closing oil circuit, so that the oil circuit passage of the working device is complicated, and the manufacturing and processing difficulty is increased. Therefore, how to simplify the oil circuit passage of the transmission device becomes a technical problem to be solved. SUMMARY

[0003] The present application provides an oil circuit assembly, which can solve the problem of complicated oil circuit passage of the transmission device.

[0004] To solve the above technical problem, the present application provides an oil circuit assembly, which comprises an oil tank and a reversing valve. The oil tank stores driving oil, and the reversing valve is used for switching the flow direction of the driving oil. The oil tank is provided with a side wall, and the side wall is provided with a valve rod hole, a driving oil input passage, a first passage and a second passage. The valve rod hole penetrates the side wall, the reversing valve is slidingly accommodated in the valve rod hole, the driving oil input passage, the first passage and the second passage are all communicated with the valve rod hole, and the driving oil input passage can input the driving oil pressurized by a motor. When the reversing valve slides to a first position, the first passage and the second passage can be respectively communicated with the driving oil input passage and the oil tank through the reversing valve, the driving oil is input into the working device from the first passage, and then flows back to the oil tank through the second passage. When the reversing valve slides to a second position, the first passage and the second passage can be respectively communicated with the oil tank and the driving oil input passage through the reversing valve, the driving oil is input into the working device from the second passage, and then flows back to the oil tank through the first passage.

[0005] The present application provides a hydraulic transmission device, which comprises a driving pump and a working device. The driving pump drives the working device to work through driving oil. The driving pump is provided with the above-mentioned oil circuit assembly.

[0006] The oil circuit assembly provided by the present application is provided with a reversing valve. The reversing valve can be switched between a first position and a second position, so that the first passage and the second passage can be communicated with the driving oil input passage or the oil tank, so that the driving oil can flow bidirectionally in the loop formed by the first passage and the second passage to drive the working device to move back and forth. In addition, no additional return oil passage is needed, the number of oil circuit passages can be reduced, and the oil circuit passage of the transmission device is simplified. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of an embodiment of the oil circuit assembly provided in this application when the directional valve is pressed;

[0009] Figure 2 This is a schematic diagram of the structure of the oil circuit assembly provided in this application when the directional valve is reset;

[0010] Figure 3 This is an exploded structural diagram of an embodiment of the oil circuit assembly provided in this application;

[0011] Figure 4 This is a schematic diagram of the structure of an embodiment of the reversing valve provided in this application;

[0012] Figure 5 This is a schematic diagram of an embodiment of the hydraulic transmission device provided in this application. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] In the description of the application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited. The terms "first", "second", "third" in the embodiments of the present application are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second", "third" can explicitly or implicitly include at least one of the features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.

[0015] Reference herein to "embodiments" means that the particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a separate or alternative embodiment. It is explicitly and implicitly understood that the embodiments described herein can be combined with each other.

[0016] The present application provides an oil circuit assembly. Please refer to Figures 1-3 , Figure 1 is a structural schematic diagram of the oil circuit assembly provided by the present application when the reversing valve of an embodiment is pressed down, Figure 2 is a structural schematic diagram of the oil circuit assembly provided by the present application when the reversing valve of an embodiment is reset, Figure 3 is an exploded structural schematic diagram of an embodiment of the oil circuit assembly provided by the present application. The oil circuit assembly 100 can include an oil tank 10 and a reversing valve 20. The oil tank 10 stores driving oil, and the driving oil pressurized by a motor is used to drive a working device to work, and the reversing valve 20 is used to switch the flow direction of the driving oil.

[0017] The oil tank 10 is provided with a side wall 11, and the side wall 11 is provided with a valve rod hole 12, a driving oil input channel 13, a first channel 14 and a second channel 15. The valve rod hole 12 penetrates the side wall 11, and a reversing valve 20 is slidingly arranged in the valve rod hole 12. The driving oil input channel 13, the first channel 14 and the second channel 15 are all communicated with the valve rod hole 12. The driving oil input channel 13 can input driving oil pressurized by a motor. The first channel 14 and the second channel 15 can be opening oil paths or closing oil paths of a working device. When driving oil is input into the working device from the first channel 14 or the second channel 15, the driving oil can drive the working device to make reciprocating movement of opening or closing. Hereinafter, the first channel 14 is taken as an example to illustrate the opening oil path of the working device, and the second channel 15 is taken as an example to illustrate the closing oil path of the working device.

[0018] When the reversing valve 20 slides to a first position, the first channel 14 and the second channel 15 can be communicated with the driving oil input channel 13 and the oil tank 10 respectively through the reversing valve 20, driving oil is input into the working device from the first channel 14 and flows back to the oil tank 10 through the second channel 15; when the reversing valve 20 slides to a second position, the first channel 14 and the second channel 15 can be communicated with the oil tank 10 and the driving oil input channel 13 respectively through the reversing valve 20, driving oil is input into the working device from the second channel 15 and flows back to the oil tank 10 through the first channel 14. The first position and the second position can be positions of the reversing valve 20 when the reversing valve 20 is pressed or reset. Hereinafter, the first position is taken as an example to illustrate the position of the reversing valve 20 when the reversing valve 20 is pressed, and the second position is taken as an example to illustrate the position of the reversing valve 20 when the reversing valve 20 is reset.

[0019] The oil path assembly 100 provided by the present application is provided with the reversing valve 20, the reversing valve 20 can be switched between the first position and the second position, so that the first channel 14 and the second channel 15 can be communicated with the driving oil input channel 13 or the oil tank 10, so that the driving oil can flow bidirectionally in the loop formed by the first channel 14 and the second channel 15 to drive the working device to make reciprocating movement, without the need to set an additional oil return channel, which can reduce the number of oil path channels and simplify the oil path channels of the transmission device.

[0020] The driving oil input channel 13, the first channel 14 and the second channel 15 can be arranged on the side wall 11 in a spaced manner. The positions where the driving oil input channel 13, the first channel 14 and the second channel 15 are arranged can be determined as required, a plurality of oil path channels can be arranged on the same side of the valve rod hole 12, or can be arranged on opposite sides of the valve rod hole 12. In an embodiment, the first channel 14 and the driving oil input channel 13 are arranged on one side of the valve rod hole 12 in a spaced manner, and the second channel 15 is arranged on the opposite side of the valve rod hole 12. The longitudinal direction of the driving oil input channel 13, the first channel 14 and the second channel 15 can be perpendicular to the longitudinal direction of the valve rod hole 12.

[0021] The driving oil input channel 13, the first channel 14 and the second channel 15 can be processed by drilling on the side wall 11, or can be reserved channels when the side wall 11 is integrally formed by injection molding. When the oil channel is processed by drilling, the plurality of process holes 16 on the side wall 11 need to be plugged to prevent oil leakage, as shown in Figure 3 .

[0022] Specifically, the reversing valve 20 includes a valve rod 21, an oil return hole 22, an annular groove 23, a first through hole 24 and a second through hole 25, please refer to Figure 4 , Figure 4 is a structural schematic diagram of an embodiment of the reversing valve provided by the present application. The valve rod 21 is rod-shaped, and the cross section of the valve rod 21 can be circular or polygonal. The valve rod 21 is slidingly accommodated in the valve rod hole 12, and the oil return hole 22 is longitudinally formed in the valve rod 21 and communicates with the oil reservoir 10. The annular groove 23 is formed on the outer periphery of the valve rod 21, and the annular groove 23 can communicate the driving oil input channel 13 with the first channel 14 or the second channel 15. Specifically, when the reversing valve 20 is in the first position, the annular groove 23 communicates the driving oil input channel 13 with the first channel 14, as shown by the arrow direction in Figure 1 ; when the reversing valve 20 is in the second position, the annular groove 23 communicates the driving oil input channel 13 with the second channel 15, as shown by the arrow direction in Figure 2 , so that the pressurized driving oil output by the driving oil input channel 13 can enter the working equipment through the first channel 14 or the second channel 15.

[0023] The first through hole 24 and the second through hole 25 formed on the opposite sides of the annular groove 23 both communicate with the oil return hole 22, and the first through hole 24 and the second through hole 25 are respectively arranged corresponding to the first channel 14 and the second channel 15. Specifically, when the reversing valve 20 is in the first position, the second through hole 25 can communicate with the second channel 15 and the oil return hole 22, forming an oil return channel from the second channel 15, the second through hole 25, the oil return hole 22 to the oil reservoir 10, as shown by the arrow direction in Figure 1 ; when the reversing valve 20 is in the second position, the first through hole 24 can communicate with the first channel 14 and the oil return hole 22, forming an oil return channel from the first channel 14, the first through hole 24, the oil return hole 22 to the oil reservoir 10, as shown by the arrow direction in Figure 2 .

[0024] The width of the annular groove 23 along the longitudinal direction of the valve rod 21 is greater than or equal to the distance between the first channel 14 and the driving oil input channel 13, and is greater than or equal to the distance between the second channel 15 and the driving oil input channel 13, so that the annular groove 23 can communicate the driving oil input channel 13 with the first channel 14 or the second channel 15.

[0025] The cross-sectional shape of the first through hole 24, the second through hole 25, the first passage 14 and the second passage 15 can be circular or polygonal. The cross-sectional area of the first through hole 24 and the second through hole 25 is greater than or equal to the cross-sectional area of the first passage 14 and the second passage 15, respectively, so that the driving oil can flow back to the oil reservoir 10. In an embodiment, the cross-section of the first through hole 24, the second through hole 25, the first passage 14 and the second passage 15 is circular, and the cross-sectional diameter of the first through hole 24 and the second through hole 25 is greater than or equal to the cross-sectional diameter of the first passage 14 and the second passage 15, respectively.

[0026] In an embodiment, the cross-sectional shape of the oil return hole 22 is circular, and the cross-sectional diameter of the oil return hole 22 is greater than or equal to the cross-sectional diameter of the first passage 14 and the second passage 15, which can reduce the resistance when the driving oil flows back.

[0027] To limit the sliding stroke of the reversing valve 20, the valve rod 21 is provided with a first limit stop ring 211 and a second limit stop ring 212, which are respectively arranged on opposite sides of the valve rod 21. The first limit stop ring 211 is located on the side of the first through hole 24, and the second limit stop ring 212 is located on the side of the second through hole 25.

[0028] In an embodiment, the reversing valve 20 is also provided with a spring 26, which is sleeved on the valve rod 21 and arranged between the side wall 11 and the second limit stop ring 212, so that the reversing valve 20 can be switched between the first position and the second position. When the reversing valve 20 is pressed down, the reversing valve 20 moves from the second position to the first position, and the second limit stop ring 212 compresses the spring 26; when the reversing valve 20 is released, the spring 26 recovers deformation, and the spring 26 exerts a pushing force on the second limit stop ring 212 to reset the valve rod 21 to the second position.

[0029] To enhance the sealing between the valve rod 21 and the valve rod hole 12, in an embodiment, a groove 213 is formed on the outer periphery of the valve rod 21 between the second through hole 25 and the second limit stop ring 212, and a sealing ring 214 is arranged in the groove 213, so that the driving oil cannot leak out.

[0030] The present application provides a hydraulic transmission device, please refer to Figure 5 , Figure 5 is a structural schematic diagram of an embodiment of the hydraulic transmission device provided by the present application. The hydraulic transmission device 300 comprises a driving pump 310 and a working device 320, the driving pump 310 drives the working device 320 to work through driving oil, and the driving pump 310 is provided with the oil circuit assembly 100 as described above. The hydraulic transmission device 300 can be a double-acting jacking device, a shearing device, an expander, etc.

[0031] The oil circuit assembly provided by the present application has at least the following beneficial effects:

[0032] The oil circuit assembly 100 is provided with a reversing valve 20, which can be switched between a first position and a second position, so that the driving oil can flow bidirectionally in the loop formed by the first passage 14 and the second passage 15, without the need to set an additional oil return passage, which can reduce the number of oil circuit passages and simplify the oil circuit passages of the transmission.

[0033] The above merely describes some embodiments of the present application, and does not limit the protection scope of the present application, and any equivalent device or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An oil circuit assembly for a hydraulic transmission, characterized in that, The utility model relates to a kind of oil tank and reversing valve, the oil tank is stored with driving oil, the reversing valve is used to switch the flow direction of driving oil;The oil tank is provided with side wall, valve stem hole, driving oil input channel, first channel and second channel are opened in the side wall;The valve stem hole penetrates the side wall, the reversing valve is slidably accommodated in the valve stem hole, the driving oil input channel, the first channel and the second channel are communicated with the valve stem hole, the driving oil input channel can input driving oil pressurized by motor;When the reversing valve slides to first position, the first channel and the second channel can be communicated with the driving oil input channel and the oil tank respectively by the reversing valve, the driving oil is input from the first channel to working equipment, and is returned to the oil tank by the second channel;When the reversing valve slides to second position, the first channel and the second channel can be communicated with the oil tank and the driving oil input channel respectively by the reversing valve, the driving oil is input from the second channel to working equipment, and is returned to the oil tank by the first channel;Wherein, the first position is the position when the reversing valve is pressed, and the second position is the position when the reversing valve resets. The first channel and the driving oil input channel are arranged on one side of the valve stem hole, and the second channel is arranged on the opposite side of the valve stem hole. The reversing valve includes a valve stem, a return oil hole, an annular groove, a first through hole, and a second through hole. The valve stem is slidably accommodated in the valve stem hole, and the return oil hole is longitudinally arranged along the valve stem and communicated with the oil tank. The annular groove is arranged on the outer periphery of the valve stem, and can communicate the driving oil input channel with the first channel or the second channel. The first through hole and the second through hole, which are arranged on opposite sides of the annular groove, are both communicated with the return oil hole, and the first through hole and the second through hole are respectively correspondingly arranged with the first channel and the second channel. The width of the annular groove along the valve stem is greater than or equal to the distance between the first channel and the driving oil input channel, and greater than or equal to the distance between the second channel and the driving oil input channel.

2. The oil passage assembly according to claim 1, characterized by, The cross-sectional shape of the first through hole, the second through hole, the first channel, and the second channel is circular, and the cross-sectional diameter of the first through hole and the second through hole is greater than or equal to the cross-sectional diameter of the first channel and the second channel.

3. The oil circuit assembly of claim 2, wherein, The cross-sectional shape of the return oil hole is circular, and the cross-sectional diameter of the return oil hole is greater than or equal to the cross-sectional diameter of the first channel and the second channel. The valve stem is provided with a first limit stop ring and a second limit stop ring to limit the sliding stroke of the reversing valve. The first limit stop ring and the second limit stop ring are respectively arranged on opposite sides of the valve stem, the first limit stop ring is located on one side of the first through hole, and the second limit stop ring is located on one side of the second through hole. ​ ​ 4. The oil circuit assembly of claim 3, wherein, ​ 5. The oil passage assembly of claim 3, wherein ​ 6. The oil circuit assembly of claim 5, wherein, ​ 7. The oil passage assembly according to claim 3, characterized by ​ 8. The oil circuit assembly of claim 7, wherein, The reversing valve comprises a spring, the spring is sleeved on the valve rod, the spring is arranged between the side wall and the second limiting check ring, so that the reversing valve can be switched between the first position and the second position.

9. The oil circuit assembly of claim 7, wherein, The valve rod is provided with a groove along the outer periphery between the second through hole and the second limiting check ring, and a sealing ring is arranged in the groove, so as to enhance the sealing between the valve rod and the valve rod hole.

10. A hydraulic transmission apparatus characterized by comprising: Comprising: A drive pump and a working device, the drive pump drives the working device to work by driving oil, and the oil circuit assembly as claimed in any one of claims 1-9 is arranged on the drive pump.

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