Superimposable oilway assembly

Abstract

This invention relates to a stackable hydraulic circuit assembly, comprising: a hydraulic circuit plate including one base plate and n stacking plates; the top surface of the base plate and the bottom and top surfaces of the stacking plates are provided with oil inlet ports and oil return ports, and the base plate and the n stacking plates are sequentially fixedly connected via the bottom and top surfaces; a valve mounting interface including multiple valve holes, disposed on the same side of the hydraulic circuit plate; top fixing seats protruding laterally on both sides of the top surfaces of the base plate and the stacking plates, and bottom fixing seats protruding laterally on both sides of the bottom surfaces of the stacking plates; when the top fixing seats and adjacent bottom fixing seats are directly opposite each other, the top fixing seats and bottom fixing seats can be fixedly connected to each other by fasteners; the ratio of the cross-sectional area of ​​the oil inlet port to the valve hole and the ratio of the cross-sectional area of ​​the oil return port to the valve hole are both approximately positive integers k. This facilitates ensuring the optimal flow rate of hydraulic oil, allows for arbitrary expansion of the number of groups, and results in a smaller hydraulic circuit assembly with lower material costs.

Description

Technical Field

[0001] This invention relates to an oil circuit assembly for a hydraulic system, and more particularly to a stackable oil circuit assembly. Background Technology

[0002] Traditional hydraulic systems consist of non-standard components. Users decide how many hydraulic base plates to purchase based on their required number of hydraulic control circuits. If more circuits are needed, a larger set of hydraulic base plates must be purchased to replace the existing ones, resulting in high adjustment costs and hindering scalability.

[0003] In recent years, some improved hydraulic systems have allowed multiple plates to be stacked sequentially, connected by threaded rods running from top to bottom and secured with nuts. This fixing method is cumbersome because adjusting the number of plates requires replacing the threaded rods with ones that match the thickness of the base plate. Furthermore, since the sealing between all plates relies on the through-bolts, and the sealing pressure that through-bolts can apply is limited, the number of stacked plates is restricted, preventing the expansion to more sets. Summary of the Invention

[0004] Therefore, the present invention aims to solve the technical problems of high cost and limited expansion number of hydraulic circuit blocks in existing hydraulic systems.

[0005] To address the aforementioned technical problems, the present invention provides a stackable oil circuit assembly, comprising: The oil circuit section consists of one base plate and n stacked plates, where n is an integer greater than or equal to zero; The base plate, the bottom surface, and the top surface of the stacking plate are all provided with oil inlet ports and oil return ports. The base plate and n stacking plates are fixedly connected in sequence through the bottom surface and the top surface. The oil inlet ports of the base plate and the n stacking plates are connected in sequence, and the oil return ports are connected in sequence. The valve mounting interface includes multiple valve holes, which are located on the same side of the oil circuit plate. Top fixing seats protrude laterally from both sides of the top surface of the base plate and the stacking plate, and bottom fixing seats protrude laterally from both sides of the bottom surface of the stacking plate. When the top fixing seat and the adjacent bottom fixing seat face each other, the top fixing seat and the bottom fixing seat can be fixedly connected to each other by fasteners. The ratio of the cross-sectional area of ​​the oil inlet port to the cross-sectional area of ​​the valve hole, and the ratio of the cross-sectional area of ​​the oil return port to the cross-sectional area of ​​the valve hole are both approximately k, where k is a positive integer.

[0006] In one embodiment, both the top fixing seat and the bottom fixing seat include multiple fixing holes. The multiple fixing holes of the top fixing seat and the bottom fixing seat of adjacent oil circuit plates correspond one-to-one. The fastener passes through two of the corresponding fixing holes to fasten the top fixing seat and the bottom fixing seat.

[0007] In one embodiment, the fixing holes of the two top fixing seats on both sides of the top surface of the base plate and the stacking plate are mirror-symmetrical to each other, and the fixing holes of the two bottom fixing seats on both sides of the bottom surface of the stacking plate are mirror-symmetrical to each other.

[0008] In one embodiment, the ratio of the cross-sectional area of ​​the oil inlet port to the cross-sectional area of ​​the oil inlet channel port, and the ratio of the cross-sectional area of ​​the oil return port to the cross-sectional area of ​​the oil return channel port are in the range of k ± 0.1, where the positive integer k equals 3.

[0009] In one embodiment, the oil circuit assembly further includes an auxiliary positioning structure, which includes a first positioning structure disposed on the top surface of the base plate and the top surface of the stacking plate, and a second positioning structure disposed on the bottom surface of the stacking plate. The first positioning structure and the second positioning structure are mutually positioned and cooperated to assist in positioning the base plate and the adjacent stacking plate, as well as two adjacent stacking plates.

[0010] In one embodiment, the first positioning structure includes positioning pins disposed on the top surfaces of the base plate and the stacking plate, and the second positioning structure includes positioning holes disposed on the bottom surface of the stacking plate. The positioning pins and the positioning holes are embedded and fitted one-to-one to position the base plate, the adjacent stacking plate, and the two adjacent stacking plates.

[0011] In one embodiment, no sealing connection structure is provided in the oil inlet port and the oil return port. The oil circuit assembly also includes a top plate for sealing the top surface of the oil circuit plate. The bottom fixing seats are provided on both sides of the top plate. The bottom fixing seats are fixedly connected to the top fixing seat of the top layer. There is no oil circuit in the top plate, which is used to seal the oil inlet port and the oil return port on the top surface.

[0012] In one embodiment, a second positioning structure is provided on the lower surface of the top plate, and the second positioning structure is positioned and engaged with the first positioning structure of the uppermost oil circuit plate.

[0013] In one embodiment, no sealing connection structure is provided in the oil inlet port and the oil return port. The base plate includes a stacked plate and a bottom plate fixedly disposed at the bottom of the stacked plate. There is no oil passage in the bottom plate, which is used to seal the oil inlet port and the oil return port on the bottom surface of the lowest layer of the oil passage plate.

[0014] In one embodiment, top fixing seats are provided on both sides of the base plate, and the top fixing seats are used to fix them to the bottom fixing seats of the lowest layer of the stacking plate.

[0015] The technical solution provided by this invention has the following advantages: The stackable hydraulic circuit assembly provided by this invention features relatively independent stacking and fixing structures for adjacent hydraulic circuit panels, all secured by fasteners. No special parts are required, making the stacking and fixing simple and reliable. The fastening pressure is not lost with the stacking of more hydraulic circuit panels, and it can accommodate any number of stacked hydraulic circuit panels. Furthermore, by ensuring that the ratio of the cross-sectional area of ​​the oil inlet port to the valve orifice, and the ratio of the cross-sectional area of ​​the oil return port to the valve orifice, to approximately a positive integer k, the hydraulic circuit assembly can be expanded to any number of panels. This results in a smaller, more compact assembly with lower material costs. The stacked connection structure offers high reliability and stability. It also allows users to determine the ideal number of oil inlet and return ports for the hydraulic circuit based on the number of valves operating simultaneously, ensuring the optimal hydraulic oil flow rate. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a three-dimensional structural diagram of the two sets of oil circuit plates of the oil circuit assembly provided in an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the stacked plates of the oil passage panel shown; Figure 3 This is an exploded structural diagram of a stacked plate and a top plate of the oil circuit assembly provided in an embodiment of the present invention; Figure 4 A three-dimensional structural schematic diagram of two sets of oil circuit plates for an oil circuit assembly provided in another embodiment of the present invention; Figure 5 This is a three-dimensional structural diagram of two sets of oil passage plates and a top plate provided in another embodiment of the present invention; Figure 6This is a three-dimensional structure of the base plate for the oil circuit assembly provided in an embodiment of the present invention. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below. Example 1

[0019] This embodiment provides a modular, flexibly assembled oil circuit assembly. The following will refer to the attached... Figure 1-3 The oil circuit assembly of this embodiment will be described in detail.

[0020] Please see Figure 1 As shown, the stackable oil circuit assembly provided in this embodiment includes multiple oil circuit panels 100. Each oil circuit panel has an internal oil circuit and is roughly rectangular in shape, allowing them to be stacked to form a multi-layer panel structure. Each oil circuit panel 100 includes one base plate 10 and n stacking plates 20, where n is an integer greater than or equal to zero. The base plate 10, as the first group, is the foundation for stacking and is therefore called the base plate, or simply the substrate. Any number of stacking plates 20 can be stacked on top of the base plate 10, or they can be left unstacked, meaning the base plate 10 of the oil circuit panel 100 can function independently. The n stacking plates 20 can be sequentially stacked on top of the base plate 10 to form n+1 groups of oil circuit assemblies. Figure 1 The oil circuit panel 100 shown includes one base plate 10 and one superimposed plate 20, i.e., n equals 1. Of course, the number of superimposed plates can be more, such as two, three or even more, which is not limited here.

[0021] For ease of explanation, the side of the base plate opposite the stacking plate is defined as the top surface, and the side opposite the top surface is defined as the bottom surface. The base plate is stacked on top of the stacking plate via its top surface; that is, the bottom surface of the stacking plate rests on the top surface of the base plate, and they are fixed together to achieve the stacking of two layers of oil passage panels. The direction perpendicular to the top surface of the stacking plate (indicated by reference numeral 23 in the attached diagram) and away from the base plate is the stacking direction d of the oil passage panels (e.g., ...). Figure 1 (As indicated by the middle arrow d). During stacking, the stacking direction d can be vertical or horizontal. That is, the base plate and the stacking plates can be stacked vertically or horizontally. The stacking plates in the oil passage section can be stacked in any number of groups along the stacking direction s. The side of the stacking plate facing the base plate is defined as the bottom surface, and the side facing away from the base plate is defined as the top surface.

[0022] Figure 1In the illustrated embodiment, the top surface 23 of the stacking plate 20 is approximately horizontal, the stacking direction d is along the vertical direction, and the stacking plate 20 is stacked and positioned directly above the base plate 10. Please refer to... Figure 2 As shown, the oil inlet and return channels in the stacked plate 20 are arranged through the top surface 23 and the bottom surface (not shown). Both the top surface 23 and the bottom surface of the stacked plate 20 are provided with oil inlet port p20' and oil return port t20'. The oil inlet port p20' of the top surface 23 and the bottom surface of the stacked plate 20 are interconnected, as are the oil return port t20' of the top surface 23 and the bottom surface of the stacked plate 20. Similarly, the top surface of the base plate 10 is provided with an oil inlet port (not shown) and an oil return port (not shown). The difference is that the oil inlet and return channels do not penetrate the bottom surface of the base plate 10. That is, the bottom surface of the base plate 10 does not have oil inlet and return port, or the oil inlet and return port on the bottom surface of the base plate 10 are closed. In specific implementations, the bottom surface of the base plate can be fixed to a corresponding positioning structure for fixing the oil circuit assembly. Typically, the bottom surface of the base plate is fixed to the tank cover of the oil tank.

[0023] The bottom surface of the stacking plate 20 faces the top surface of the base plate 10. The stacking plates 20 are stacked on top of the base plate 10, and the stacking plates 20 and the base plate 10 are fixedly connected to each other. If the number of stacking plates 20, n, is greater than or equal to 2, similar to the above stacking method, the bottom surface of the second stacking plate 20 is placed on the top surface 23 of the first stacking plate 20, and the two stacking plates 20 are fixedly connected to each other. Using the above method, n stacking plates can be stacked and fixed on the (n-1)th stacking plate 20. In this way, the stacking plates 20 are fixedly connected sequentially through their bottom and top surfaces, and the oil inlet ports of the base plate and the n stacking plates are connected sequentially, as are the oil return ports.

[0024] After confirming the number of sets of oil passage panels to be stacked, the oil passage panels are stacked and fixed sequentially to obtain a multi-layer oil passage panel. The multi-layer oil passage panel forms a roughly cuboid structure, with an oil inlet and an oil return port located on one side parallel to the stacking direction d. That is, the oil inlet and oil return ports of the multi-layer oil passage panel are located on the same side. The oil inlet port is used to connect to the oil inlet pipeline, and the oil return port is used to connect to the oil return pipeline.

[0025] Please continue reading Figure 1One side of the base plate 10 is provided with an oil inlet port P10 and an oil return port T10. This configuration of the oil inlet port P10 and oil return port T10 is defined as the front of the base plate 10, the side opposite the front is the rear, and the other two sides are the left and right sides. Similarly, the front of the stacked plate 20 is provided with an oil inlet port P20 and an oil return port T20, the side opposite the front is the rear, and the other two sides are the left and right sides. After the oil circuit panels 100 are stacked, the front sides of the base plate 10 and the n stacked plates 20 are located on the same side of the oil circuit panels. Specifically, the front sides of the base plate 10 and the stacked plates 20 are approximately coplanar, and the rear sides of the base plate 10 and the stacked plates 20 are also approximately coplanar.

[0026] It should be noted that the base plate 10 does not necessarily have both an oil inlet port P10 and an oil return port T10, nor does the stacking plate 20 necessarily have both an oil inlet port P20 and an oil return port T20. The base plate 10 may only have an oil inlet port P10, and the base plate 20 may only have an oil return port T20. Of course, depending on the needs, the base plate 20 may also omit both oil inlet ports P20 and T20. As long as the oil inlet and return ports of the multi-layered oil circuit board formed after stacking meet the requirements, it is acceptable. The configuration of the oil inlet and return ports of the multi-layered oil circuit board will be further explained later.

[0027] For a specific embodiment, please refer to Figure 2 Both the base plate 10 and the stacked plate 20 are equipped with valve mounting interfaces V20 for installing oil circuit control valves (hereinafter referred to as valves). That is, each oil circuit plate is connected to a valve. Each valve mounting interface V20 includes multiple valve holes for communication with the valve. The diameter of each valve hole is basically the same. Figure 2 In the illustrated embodiment, the valve mounting interface V20 includes four valve holes. Working ports are respectively provided on the left and right sides of the base plate 10 and the stacked plate 20 for connecting hydraulic actuators; therefore, they can also be referred to as actuator interfaces. Taking the side with the inlet and outlet ports as the front, working port A is provided on the left side of the base plate 10 and the stacked plate 20, and working port B is provided on the right side of the base plate 10 and the stacked plate 20.

[0028] Top fixing seats 11 protrude laterally from both sides of the top surface of the base plate 10, and top fixing seats 21 protrude laterally from both sides of the top surface 23 of the stacked plate 20. There are two top fixing seats 11 on the base plate 10, positioned opposite each other on both sides of the top surface. There are also two top fixing seats 21 on the stacked plate 20, positioned opposite each other on both sides of the top surface. Each top fixing seat 11 and 21 has the same structure, except that the oil passage plate it is positioned on is different. Similarly, bottom fixing seats 22 protrude laterally from both sides of the bottom surface of the stacked plate 20. There are also two bottom fixing seats 22 on the stacked plate 20, positioned opposite each other on both sides of the bottom surface. When the stacked plates 20 are stacked on top of the base plate 10, the top fixing seats 11 of the base plate 10 and the bottom fixing seats 22 of the stacked plate 20 face each other, and are securely connected by fasteners 40. Similarly, the stacked plates 20 are fixed using the method described above, and the top fixing seat 21 and bottom fixing seat 22 of two adjacent stacked plates 20 are fixedly connected to each other by fasteners. This achieves the stacking and fixing of multi-layer oil passage panels.

[0029] Optionally, the oil circuit assembly may also include an auxiliary positioning structure for assisting in the positioning of adjacent oil circuit panels. The auxiliary positioning structure includes a first positioning structure 31 and a second positioning structure 32. The first positioning structure 31 is disposed on the top surface of the base plate 10 and the top surface of the stacking plate 20, and the second positioning structure 32 is disposed on the bottom surface of the stacking plate 20. The first positioning structure 31 and the second positioning structure 32 cooperate with each other to assist in the positioning of the base plate 10 and adjacent stacking plates 20, as well as two adjacent stacking plates 20. When the stacking plate 20 and the base plate 10 are stacked together, with the top surface of the base plate 10 and the bottom surface of the stacking plate 20 facing each other, and when the first positioning structure 31 on the base plate 10 and the second positioning structure 32 on the bottom surface of the stacking plate 20 are interlocked, it indicates that the relative positional relationship between the stacking plate 20 and the base plate 10 meets the stacking requirements. Therefore, the auxiliary positioning structure can help the operator quickly position the stacking plates that need to be stacked, making the stacking operation simpler and more reliable.

[0030] In practical implementation scenarios, it is generally necessary to ensure that the flow rates of pressurized oil in the inlet channel and return oil in the return channel of the oil circuit assembly are within a reasonable range. Therefore, the diameters of the inlet and return channels directly determine the number of valve groups that can operate simultaneously when the oil circuit panels are stacked. In this embodiment, the ratio of the cross-sectional area of ​​the inlet port (p20') to the valve orifice (single valve orifice), and the ratio of the cross-sectional area of ​​the return channel interface (t20') to the valve orifice (single valve orifice) are both approximately equal to k, where k is a positive integer. It should be noted that the ratio of the cross-sectional area of ​​the inlet port (p20') to the valve orifice, and the ratio of the cross-sectional area of ​​the return channel interface (t20') to the valve orifice are considered to be within ±0.1 and are considered to be fixed at k. By setting the ratio of the inlet port (p20') to the cross-sectional area of ​​the valve orifice, and the ratio of the return port (t20') to the cross-sectional area of ​​the valve orifice, to approximately equal to a known positive integer k, connecting one set of inlet and return ports is ideal when accommodating k groups of valves operating simultaneously. Conversely, even if the ratio is not a positive integer, such as k+0.5, it is still ideal when accommodating k groups of valves operating simultaneously. However, to meet structural strength requirements, the wall thickness of each oil circuit panel will be greater, resulting in a larger volume and a larger overall oil circuit assembly, leading to higher costs. Therefore, by setting the ratio to a positive integer, the ideal number of sets of inlet and return ports for connecting the oil circuit can be determined based on the number of valves that need to operate simultaneously.

[0031] For example, when k equals 3, if the hydraulic circuit assembly requires 3 valves to operate simultaneously, it is appropriate to connect one set of inlet and return ports (1 inlet port and 1 return port). If 4 valves need to operate simultaneously, the user can connect only 1 inlet port and 1 return port (also called 1 set of inlet and return ports). In this case, the flow rate at the inlet and return ports will be slightly faster than the flow rate (reasonable value) at the valve orifices, resulting in slightly more heat generation in the hydraulic oil. Moreover, excessive heat generation in the hydraulic oil is undesirable. The user can also connect 2 inlet ports and 2 return ports, in which case the flow rate at the inlet and return ports will be slightly slower than the flow rate at the valve orifices, thus avoiding excessive heat generation. This embodiment recommends two oil inlet ports and two oil return ports, and tries to arrange them appropriately. For example, one set of oil inlet ports and oil return ports is located on the middle oil circuit plate of two valves that are working simultaneously, and another set of oil inlet ports and oil return ports is located on the middle oil circuit plate of another two valves that are working simultaneously. This distribution will make the flow rate of the oil inlet ports and oil return ports more ideal.

[0032] The oil circuit assembly provided in this application has a base plate and adjacent stacked plates, as well as two adjacent stacked plates, which are fixedly connected to each other by top and bottom fixing seats, respectively. Adjacent oil circuit plates are fastened with fasteners, and the reliability of the fastening connection and sealing between adjacent oil circuit plates will not be affected by the increase in the number of stacked sets. Moreover, the fasteners used for any two adjacent oil circuit plates are of the same specification, and only the number of fasteners needs to be increased when stacking multiple sets of oil circuit plates, without the need to replace fasteners of different standards. The fastening structure is simple and easy to expand. Furthermore, by setting the ratio of the cross-sectional area of ​​the oil inlet port (p20') to the valve hole, and the ratio of the cross-sectional area of ​​the oil return port (t20') to the valve hole to be approximately equal to a known positive integer k, the user can easily determine the number of sets of oil inlet and oil return ports for the ideal connection oil circuit according to the number of valves that need to work simultaneously. Therefore, the hydraulic circuit assembly provided in this application is easy to expand the number of groups arbitrarily, has a smaller overall size, lower material cost, and high reliability and stability of the superimposed connection structure; moreover, the number of groups of oil inlet and return ports of the ideal connection oil circuit can be determined according to the number of valves that need to work at the same time, so as to ensure the most ideal hydraulic oil flow rate.

[0033] Understandably, the larger the cross-section of the oil inlet and return channels, the thicker the oil circuit panel needs to be to ensure structural strength, resulting in higher manufacturing costs and increased volume of the base plate and stacking plate. In a preferred embodiment, setting k to 3, that is, the ratio of the cross-sectional area of ​​the oil inlet port (p20') to the valve hole, and the ratio of the cross-sectional area of ​​the return channel interface (t20') to the valve hole are both approximately equal to 3, is a better choice considering the number of valves that can operate simultaneously and the volume of the oil circuit panel.

[0034] In specific implementation scenarios, when three sets of valves need to operate simultaneously, it is recommended to connect one set of oil inlet port P10 and oil return port T10 on the base plate 10. When the number of valves that need to operate simultaneously is 4, 5, or 6, it is recommended to connect two sets of oil inlet ports and oil return ports.

[0035] The auxiliary positioning structure of the oil circuit panels facilitates their stacking and fixing. In a specific embodiment, the first positioning structure 31 is a positioning pin, and the second positioning structure 32 is a positioning hole. The positioning pin is located on the top surface of the base plate 10 and the stacking plate 20, and the positioning hole is located on the bottom surface of the stacking plate 20. The positioning pin and the positioning hole are embedded in each other to position the base plate and the adjacent stacking plate, as well as two adjacent stacking plates. Specifically, there are two positioning pins, spaced apart at both ends of the top surface of the base plate 10 and the stacking plate 20. The positioning pin 31 is roughly centered along the width direction, and the two positioning pins are respectively close to the two top fixing seats (21, 11). The positioning hole is a hole of a certain depth located on the bottom surface of the stacking plate 20, corresponding to the two positioning pins, and is used to insert the positioning pins to assist in positioning the two oil circuit panels. Of course, in other embodiments, the positions of the positioning pins and positioning holes can be interchanged, as long as auxiliary relative positioning can be achieved.

[0036] In a specific embodiment, the top fixing seats 11 and 21 and the bottom fixing seat 22 are all constructed as bosses located on both sides of the top surface, and each of the top fixing seats 11, 21 and the bottom fixing seat 22 is provided with multiple fixing holes. The thickness of the bottom fixing seat 22 is less than the thickness of the top fixing seats 11 and 21. The fastener 40 is preferably a screw. The thickness of the upper boss needs to ensure sufficient mating length for the screw (generally, at least 10 threads are recommended), and the thickness of the lower boss must ensure sufficient strength to prevent deformation and sealing failure due to the screw's inability to withstand the designed maximum hydraulic pressure. The thickness of the bottom fixing seat 22 is less than the thickness of the top fixing seats 11 and 21, ensuring sufficient fixing strength. For example, the boss thickness of the top fixing seat is designed to be 9mm, and the boss thickness of the bottom fixing seat is designed to be 5mm. In another embodiment, the boss thickness of the top fixing seat is considered to be 12mm, and the boss thickness of the bottom fixing seat is considered to be 8mm.

[0037] For a specific embodiment, please refer to Figure 1 and 2 The top fixing seats 21 and 11 and the bottom fixing seat 22 each include multiple fixing holes. When the stacking plate 20 is placed on the base plate 10, the top surface of the base plate 10 and the bottom surface of the stacking plate 10 are positioned and engaged with each other through an auxiliary positioning structure. The top fixing seat 11 and the bottom fixing seat 22 face each other, and the multiple fixing holes correspond one-to-one. Fasteners are inserted into the corresponding two fixing holes to securely connect the top fixing seat and the bottom fixing seat, thereby fixing the two adjacent oil circuit plates. Similarly, a second stacking plate 20 is stacked on top of the stacking plate 20. The bottom and top surfaces of the two stacking plates 20 face each other, and the auxiliary positioning structures are interlocked. Fasteners are used to securely connect the top fixing seat and the bottom fixing seat of the two stacking plates 20, thereby securing the two stacking plates 20 together.

[0038] Due to the oil circuit pressure, the fixing of adjacent oil circuit plates needs to meet certain sealing requirements. In a specific embodiment, the top surfaces of both the base plate 10 and the stacked plate 20 are approximately rectangular, with two width sides and two length sides. The dimensions of the width sides are smaller than the dimensions of the length sides. For a specific embodiment, please refer to... Figure 2 The oil inlet port p20' and the oil return port t20' are arranged sequentially along the extension direction of the length side. Two top fixing seats 11 (21) are arranged opposite each other on the two width sides of the corresponding top surface, and two bottom fixing seats 22 are arranged opposite each other on the two width sides of the corresponding bottom surface. Specifically, the distances of the oil inlet port p20' and the oil return port t20' from the two length sides are basically equal, and the distances of the oil inlet port p20' and the oil return port t20' from the nearest width side are basically equal. After the top fixing seats 11 and the bottom fixing seats 22 are fixedly connected to each other, the sealing pressure applied to the oil inlet port p20' and the oil return port t20' is basically balanced and stable.

[0039] To ensure pressure balance and stability of the fastening connection, the fixing holes of the two top fixing seats 11 on both sides of the top surface of the base plate 10 are mirror-symmetrical, the fixing holes of the two top fixing seats 21 on both sides of the top surface of the stacked plate 20 are mirror-symmetrical, and the fixing holes of the two bottom fixing seats 22 on both sides of the bottom surface of the stacked plate 20 are relatively mirror-symmetrical. The fixing holes of the top fixing seats 11 and 21 are arranged sequentially along the width direction of the top surface. The fixing holes of the bottom fixing seats 22 are also arranged sequentially along the width direction of the bottom surface. Preferably, each top fixing seat and each bottom fixing seat has four fixing holes.

[0040] Base mounting seats 12 are also provided on both sides of the bottom surface of the base plate 10 for fixing the oil circuit plate onto other positioning structures (such as the fuel tank cap). The base mounting seats 12 can have the same structure as the top mounting seats of the base plate 12, or they can be different. Since the base mounting seats 12 of the base plate 12 only need to meet the fixing function and do not need to consider the oil circuit pressure and sealing requirements, the number of fixing holes provided in the base mounting seats 12 is less than that in the top mounting seats. In order to use fasteners uniformly, the specifications of the fixing holes of the base mounting seats 12 are the same as those of the top and bottom mounting seats, and uniform fasteners are also used for fixing. Specifically, each base mounting seat 12 has two fixing holes, and the two fixing holes are distributed at intervals at both ends of the base mounting seat 12.

[0041] The inlet port p20' and return port t20' on the top surface of the topmost oil manifold panel need to be sealed. Existing oil manifold panels use countersunk heads to seal these ports. However, this countersunk sealing structure requires threads of a certain depth within the inlet and return ports, connecting the countersunk head to the threads for sealing. This sealing structure necessitates separate thread manufacturing for both the inlet and return ports, resulting in high manufacturing costs. Furthermore, both ports require increased thread length, necessitating an additional thickness to the oil manifold panel, further increasing material costs.

[0042] To reduce the size and cost of the oil circuit panel, in one embodiment, please refer to... Figure 3 Neither the inlet nor the return port has a sealing connection structure. Specifically, neither the inlet nor the return port has threads, allowing for a thinner oil circuit plate and easier manufacturing. The oil circuit assembly also includes a top plate 50 for sealing the top surface of the oil circuit plate. A sealing seat (not shown) is provided on the sealing side of the top plate 50, corresponding to the inlet port p20' and the return port t20' respectively, for sealing these two points. Bottom fixing seats 52 are provided on both sides of the top plate 50. These bottom fixing seats 52 are structurally similar to the bottom fixing seat 22 of the stacked plate 20 and can be referred to accordingly; further details are omitted here. The top plate 50 is fixedly connected to the top fixing seat 21 of the uppermost layer via the bottom fixing seats 52, and the sealing seats abut against and seal the inlet port p20' and the return port t20'. The top plate contains no oil passages; it is only used to seal the inlet and return ports on the top surface. With a separate sealed top plate design, the inlet / outlet oil channel ports of the stacked plate or base plate do not require sealing threads, thus simplifying the manufacturing process and allowing for further reduction in thickness. This allows for a reduction in the thickness of both the base plate and the stacked plate, significantly reducing costs for multi-layer oil circuit systems.

[0043] Understandably, when the oil circuit panel does not include the stacking plate, the top plate can be used to seal the top surface of the base plate, thus forming an oil circuit assembly with only one oil circuit panel.

[0044] To facilitate the installation and fixation of the top plate, the top plate 50 is also provided with a second positioning structure 32. The second positioning structure 32 is used to assist in positioning with the first positioning structure 31 of the uppermost oil passage plate. Specifically, the second positioning mechanism 32 is a positioning hole. In this embodiment, the positioning hole of the top plate 50 is a hole that penetrates its thickness, so that when disassembling the top plate 50, the positioning pin can be pried open using screws or other long rods, facilitating the separation and disassembly of the top plate. Of course, the positioning hole of the top plate 50 can also be non-through.

[0045] Understandably, when connecting a set of oil inlet and return ports, if the base plate already has oil inlet port P10 and oil return port T10 on its front side, adding oil inlet and return ports to the stacked plate would increase processing costs. This is because a stacked plate with oil inlet and return ports also requires additional screw plugs for sealing. Therefore, to reduce costs and assembly complexity, in one embodiment, a stacked plate without oil inlet and return ports can be provided, or a stacked plate with only oil inlet ports or only oil return ports can be provided. Users who want to expand to more sets can purchase stacked plates with oil inlet port P10 and / or oil return port T10.

[0046] In other embodiments, when two sets of oil circuit panels are required, the base plate can be configured with only an oil inlet port, and the stack plate with only a return port. Since the base plate has only one oil inlet port, the distance between the inlet port and the side wall is increased, preventing interference between the oil pipe installation and the tank cover, thus eliminating the need for shims. The stack plate has only a return port, and the distance between the return and inlet ports is increased, supporting the largest possible pipe fittings and the hexagonal nut rotation diameter of the oil pipes. In other embodiments, the stack plate may not have inlet and return ports; instead, inlet and return ports may be provided only on the base plate.

[0047] The oil circuit assembly provided in this application can realize the stacking of multiple oil circuit panels. There are no special parts required for stacking, no limit on the number of stacked panels, and the stacking is convenient and easy to expand. It is also lower in cost and smaller in size. Example 2

[0048] This embodiment is similar to Embodiment 1, except for the structure of the oil circuit. The following description, in conjunction with the accompanying drawings, details the embodiments. Structures identical to those in Embodiment 1 are represented by the same reference numerals and will not be repeated. Please refer to... Figure 4 and Figure 5 This embodiment provides an oil circuit panel 100a, including one base plate 10a and n stacking plates 20a. The base plate 10a includes a top fixing seat 11 and a base fixing seat 12, and the stacking plates 20a include a top fixing seat 21 and a bottom fixing seat 22. The fixing structure and auxiliary positioning structure of the base plate and stacking plates of the oil circuit panel are the same as those in Embodiment 1, and can be found in Embodiment 1. The differences will not be repeated here.

[0049] In this embodiment, both the base plate 10a and the stacking plate 20a have an oil inlet channel and two types of oil return channels inside. Both the oil inlet and return channels penetrate the top and bottom surfaces of the stacking plate, but not the bottom surface of the base plate 10a. Taking the base plate 10a as an example, its front surface has an oil inlet interface P10a, an oil return interface TA10, and TB10, meaning there are two types of oil return interfaces, labeled TA10 and TB10 respectively. The corresponding top surface of the base plate 10a has three ports (not shown). Similarly, the front surface of the stacking plate 20a has an oil inlet interface P20a, an oil return interface TA20, and TB20, and the corresponding top surface of the stacking plate 20a has three ports: an oil inlet channel port p20a', an oil return channel port ta20a', and tb20a'. Among them, the return oil channel port ta20a' corresponds to the return oil interface TA20, the return oil channel port tb20a' corresponds to TB20, and the inlet oil channel port p20a' corresponds to the inlet oil interface P20a.

[0050] Both the base plate 10a and the stacked plate 20a are equipped with valve mounting interfaces V30 for installing oil circuit control valves. The valve mounting interface V30 includes five valve ports. The required return oil channel type differs accordingly; therefore, the selected return oil channel varies depending on the valve type. For example, a type A return oil interface TA* (TA10, TA20) or a type B return oil interface TB* (TB10, TB20) can be selected. In this embodiment, the ratio of the cross-sectional area of ​​the inlet channel port to the valve port, and the ratio of the cross-sectional area of ​​the return oil channel port to the valve port, are both approximately k, where k is a positive integer. The type of the return oil channel port is used in the calculation of the ratio of their cross-sectional areas to determine the type of interface to be connected.

[0051] In one embodiment, the base plate can also be replaced by an assembly of a stacking plate and a bottom plate. Please refer to [link / reference]. Figure 6 The oil circuit assembly also includes a base plate 60, which does not contain any oil circuits. The base plate 60 can be fixedly installed at the bottom of the stacked plate 20a to seal the oil inlet and return ports at the bottom of the stacked plate 20a. Thus, there is no need to manufacture or purchase a separate base plate; assembly can be achieved simply by combining the stacked plate and the base plate, reducing usage costs and increasing the flexibility of oil circuit assembly.

[0052] Top fixing seats 62 are provided on both sides of the base plate 60. The top fixing seats 62 are used to fix and connect to the bottom fixing seats 22 of the lowest layer stacked plate 20a, and are used to seal the oil inlet and return channel ports on the bottom surface of the lowest layer of the oil circuit plate. Specifically, the base plate 60 also includes sealing parts 62, which are respectively provided for the oil inlet and return channel ports on the bottom surface of the lowest layer. When the base plate 60 is fixed on the bottom surface of the lowest layer oil circuit plate, the sealing parts 62 seal against the oil inlet and return channel ports to achieve a seal. More specifically, a sealing ring is provided inside the sealing part 62.

[0053] To facilitate positioning, a first positioning structure 31 is provided on the upper surface of the base plate. The first positioning structure and the second positioning structure on the bottom surface of the lowest stacked plate are mutually positioned and cooperate with each other. The first positioning structure and the second positioning structure can be referred to the relevant content of Embodiment 1, and will not be described again.

[0054] The hydraulic circuit components provided in this application achieve modularity and stacking flexibility in hydraulic circuit modules. Through the design of a base plate and stackable plates, users can freely combine different numbers of stackable plates according to actual working conditions, like "building blocks," to quickly construct a customized hydraulic control system. This not only shortens the system development cycle but also reduces maintenance costs. When a change in function is required, only the corresponding stackable plates need to be replaced or added / removed.

[0055] A standardized sealing element (bottom plate / top plate) is provided to perfectly seal the top and bottom oil ports of the multi-layer stacked plate, ensuring the sealing of the entire oil circuit assembly and preventing leakage and contamination. At the same time, the top and bottom plates themselves have a simple structure. On the one hand, they can share the same positioning and fixing interfaces with existing stacked plates, reflecting the uniformity and integrity of the design. On the other hand, they can also reduce the size of the oil circuit plate, thereby reducing the size and volume of the oil circuit assembly.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A stackable oil circuit assembly, characterized in that, include: The oil circuit section consists of one base plate and n stacked plates, where n is an integer greater than or equal to zero; The base plate, the bottom surface, and the top surface of the stacking plate are all provided with oil inlet ports and oil return ports. The base plate and n stacking plates are fixedly connected in sequence through the bottom surface and the top surface. The oil inlet ports of the base plate and the n stacking plates are connected in sequence, and the oil return ports are connected in sequence. The valve mounting interface includes multiple valve holes, which are located on the same side of the oil circuit plate. Top fixing seats protrude laterally from both sides of the top surface of the base plate and the stacking plate, and bottom fixing seats protrude laterally from both sides of the bottom surface of the stacking plate. When the top fixing seat and the adjacent bottom fixing seat face each other, the top fixing seat and the bottom fixing seat can be fixedly connected to each other by fasteners. The ratio of the cross-sectional area of ​​the oil inlet port to the cross-sectional area of ​​the valve hole, and the ratio of the cross-sectional area of ​​the oil return port to the cross-sectional area of ​​the valve hole are both approximately k, where k is a positive integer.

2. The oil circuit assembly according to claim 1, characterized in that, Both the top mounting base and the bottom mounting base include multiple mounting holes. The mounting holes of the top mounting base and the bottom mounting base of adjacent oil circuit plates correspond one-to-one. The fastener passes through the two corresponding mounting holes to securely connect the top mounting base and the bottom mounting base.

3. The oil circuit assembly according to claim 2, characterized in that, The fixing holes of the two top fixing seats on both sides of the top surface of the base plate and the stacking plate are mirror-symmetrical to each other, and the fixing holes of the two bottom fixing seats on both sides of the bottom surface of the stacking plate are mirror-symmetrical to each other.

4. The oil circuit assembly according to claim 1, characterized in that, The ratio of the cross-sectional area of ​​the oil inlet port to the cross-sectional area of ​​the oil inlet channel port, and the ratio of the cross-sectional area of ​​the oil return port to the cross-sectional area of ​​the oil return channel port, are in the range of k ± 0.1, where the positive integer k equals 3.

5. The oil circuit assembly according to claim 1, characterized in that, The oil circuit assembly also includes an auxiliary positioning structure, which includes a first positioning structure disposed on the top surface of the base plate and the top surface of the stacking plate, and a second positioning structure disposed on the bottom surface of the stacking plate. The first positioning structure and the second positioning structure are mutually positioned and cooperated to assist in positioning the base plate and the adjacent stacking plate, as well as the two adjacent stacking plates.

6. The oil circuit assembly according to claim 5, characterized in that, The first positioning structure includes positioning pins disposed on the top surfaces of the base plate and the stacking plate, and the second positioning structure includes positioning holes disposed on the bottom surface of the stacking plate. The positioning pins and the positioning holes are embedded and fitted one-to-one to position the base plate, the adjacent stacking plate, and the two adjacent stacking plates.

7. The oil circuit assembly according to claim 1, characterized in that, Neither the oil inlet port nor the oil return port is equipped with a connection structure for sealing. The oil circuit assembly also includes a top plate for sealing the top surface of the oil circuit panel. The bottom fixing seats are provided on both sides of the top plate. The bottom fixing seats are fixedly connected to the top fixing seat of the top layer. There is no oil circuit in the top plate, which is used to seal the oil inlet port and the oil return port on the top surface.

8. The oil circuit assembly according to claim 7, characterized in that, The lower surface of the top plate is provided with a second positioning structure, which is positioned and cooperates with the first positioning structure of the uppermost oil circuit plate.

9. The oil circuit assembly according to claim 1, characterized in that, Neither the oil inlet channel port nor the oil return channel port is equipped with a sealing connection structure. The base plate includes a stacked plate and a bottom plate fixedly installed at the bottom of the stacked plate. There is no oil passage in the bottom plate, which is used to seal the oil inlet channel port and the oil return channel port on the bottom surface of the lowest layer of the oil passage plate.

10. The oil circuit assembly according to claim 9, characterized in that, Top fixing seats are provided on both sides of the base plate, and the top fixing seats are used to fix them to the bottom fixing seats of the bottommost stacked plate.

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