A double motor delayed oil return conversion valve

Abstract

The present invention provides a dual-motor delayed oil return conversion valve, comprising: an oil supply pipeline, so that the engine oil supply pipeline is connected to the main oil tank oil supply pipeline and the auxiliary oil tank oil supply pipeline respectively; an oil return pipeline, so that the engine oil return pipeline is connected to the main oil tank oil return pipeline and the auxiliary oil tank oil return pipeline respectively; and two sealing components, wherein the sealing component is controlled to move in a direction perpendicular to the extension direction of the oil supply pipeline so that the passage between the engine oil supply pipeline and the main oil tank oil supply pipeline or the auxiliary oil tank oil supply pipeline is opened or closed, or the sealing component is controlled to move in a direction perpendicular to the extension direction of the oil return pipeline so that the passage between the engine oil return pipeline and the main oil tank oil return pipeline or the auxiliary oil tank oil return pipeline is opened or closed, and the sealing components respectively arranged in the oil supply pipeline and the oil return pipeline move in the pipeline, so that the main oil tank or the auxiliary oil tank supplies oil to the engine separately, and the main oil tank or the auxiliary oil tank returns oil to the engine separately.

Description

Technical Field

[0001] The invention belongs to the technical field of oil return conversion of locomotive oil tanks, and in particular relates to a double-motor delayed oil return conversion valve. Background Art

[0002] The main and auxiliary fuel tanks are mostly configured on vehicles with special requirements for single driving mileage, or large equipment such as long-term operation of machine tools. That is, the main and auxiliary fuel tanks are filled with oil and the fuel supply to the engine equipment is realized through the conversion valve, or when one tank is finished supplying oil, it switches to the other tank to continue supplying oil. Usually, a specially configured conversion valve is required to realize the switching between the main and auxiliary fuel tanks.

[0003] A main and auxiliary oil tank conversion valve based on the prior art includes a single motor and a reduction device driven by the single motor to drive the rotation of two sets of gear sets corresponding to the main and auxiliary oil tanks respectively, thereby opening or closing the corresponding oil supply ports.

[0004] However, since the oil inlet and the oil return port of the conversion valve in the above-mentioned prior art are switched simultaneously, that is, they are switched to the main tank oil inlet and the main tank oil return at the same time, or they are switched to the auxiliary tank oil inlet and the auxiliary tank oil return at the same time, thus, the conversion valve is only limited to the case where the main and auxiliary tanks use the same type of gasoline. If the main and auxiliary tanks use different types of gasoline, oil mixing will occur.

[0005] For example, take a large vehicle that travels in extremely cold weather conditions. Since No. 0 diesel is suitable for temperatures between 8°C and 4°C, and No. -35 diesel is suitable for temperatures between -14°C and -29°C, if No. 0 diesel is used in cold temperatures (below 0°C), the diesel will condense in the fuel system of the diesel engine and cannot flow, so the diesel engine cannot start. In the prior art, No. 0 diesel is configured in the main tank and No. -35 diesel is configured in the auxiliary tank. When starting under low temperature conditions, the auxiliary tank, i.e., the No. -35 diesel tank, is first connected to start the diesel engine. After the diesel engine is started, the temperature in the exhaust pipe rises, and the No. 0 diesel in the main tank is heated by the heated gas in the exhaust pipe. After the No. 0 diesel reaches the normal use temperature, it is switched to the main tank for fuel supply through the conversion valve, and the auxiliary tank is closed, so that the diesel engine starts to work normally using No. 0 diesel. When the car needs to be shut down, the conversion valve is used to switch to the auxiliary fuel tank to ensure that the entire vehicle oil circuit contains -35 diesel, so as to ensure that the car can be started normally after being shut down.

[0006] If -35 diesel is added before the No. 0 diesel is used up, the lowest applicable temperature will be higher than when only -35 diesel is added, and its low-temperature antifreeze effect will be weakened. Therefore, considering the mixed oil situation, the key to achieving the above process is to clean up the original No. 0 diesel / or -35 diesel when replacing the oil circuit to ensure the normal start of the diesel vehicle at low temperatures. Therefore, the oil supply pipeline and the oil return pipeline are required to be independent of each other.

[0007] If the conversion valve under the existing technical structure is used in vehicles traveling under the above-mentioned extremely cold conditions, the occurrence of oil mixing cannot be avoided. An easily conceivable way is to control the opening and closing of the four valve ports by controlling the rotation angle of the motor. However, due to its single-motor design, the single conversion time is more than 400 milliseconds, which means that it takes longer to complete the oil circuit switching. In addition, in the conversion valve under the existing technology, the threaded structure used in the transmission structure has a large rotation resistance under low temperature conditions, causing the rotating structure to wear faster, affecting the service life of the conversion valve.

[0008] In view of this, the existing technology should be improved to solve the above-mentioned technical problems existing in the main and auxiliary tank conversion valves under the existing technology. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dual-motor delayed oil return conversion valve that can realize independent control of the oil supply pipeline and the oil return pipeline, improve the conversion rate of the oil supply and return conversion valve, meet the vehicle's low-temperature starting requirements, and avoid the influence of oil mixing in the fuel tank on the engine operation.

[0010] In order to solve the above technical problems, the present invention adopts a dual-motor delayed oil return conversion valve, characterized in that the conversion valve comprises: an oil supply pipeline, which allows the engine oil supply pipe to be connected to the main oil tank supply pipe and the auxiliary oil tank supply pipe respectively; an oil return pipeline, which allows the engine oil return pipe to be connected to the main oil tank return pipe and the auxiliary oil tank return pipe respectively; and two sealing components respectively arranged in the oil supply pipeline and the oil return pipeline, wherein the sealing component in the oil supply pipeline is controlled to move in a direction perpendicular to the extension direction of the oil supply pipeline so that the passage between the engine oil supply pipe and the main oil tank supply pipe or the auxiliary oil tank supply pipe is opened or closed, or the sealing component in the oil return pipeline is controlled to move in a direction perpendicular to the extension direction of the oil return pipeline so that the passage between the engine oil return pipe and the main oil tank return pipe or the auxiliary oil tank return pipe is opened or closed.

[0011] Preferably, the oil supply pipeline includes: an oil supply port connected to the engine oil supply pipe, a main oil supply port connected to the main oil tank oil supply pipe, and an auxiliary oil supply port connected to the auxiliary oil tank oil supply pipe; the oil return pipeline includes: an oil return port connected to the engine oil return pipe, a main oil return port connected to the main oil tank oil return pipe, and an auxiliary oil return port connected to the auxiliary oil tank oil return pipe.

[0012] Further preferably, the oil supply pipeline consists of a first main pipeline extending to the oil supply port, and two first branch pipelines extending to the main oil supply port and the auxiliary oil supply port respectively, and the oil return pipeline consists of a second main pipeline extending to the oil return port, and two second branch pipelines extending to the main oil return port and the auxiliary oil return port respectively, wherein the first main pipeline extends in the direction of the two first branch pipelines and connects the two first branch pipelines, then a three-way cavity is formed between the first main pipeline and the two first branch pipelines, and the cavity is defined as a first receiving cavity, the second main pipeline extends in the direction of the two second branch pipelines and connects the two second branch pipelines, then a three-way cavity is formed between the second main pipeline and the two second branch pipelines, and the cavity is defined as a second receiving cavity, and the two sealing components are movably arranged in the first receiving cavity and the second receiving cavity respectively.

[0013] More preferably, a fixed base is provided in the first receiving chamber, on one side of the first branch pipeline corresponding to the main oil supply port, and in the second receiving chamber, on one side of the second branch pipeline corresponding to the main oil return port, respectively. A base passage corresponding to the first branch pipeline / second branch pipeline passing therethrough is formed in the fixed base. A first limit bayonet is provided on one side of the base passage close to the first main pipeline / second main pipeline in the same direction as the extension direction of the first receiving chamber / second receiving chamber. First limit portions are formed on the fixed base at both sides of the limit bayonet, wherein the A terrace-shaped flange is formed on the inner cavity wall of the first receiving cavity, at a side where the first receiving cavity is connected to the first main pipeline and away from the fixed base, and on the inner cavity wall of the second receiving cavity, at a side where the second receiving cavity is connected to the second main pipeline and away from the fixed base. The terrace-shaped flange is defined as a second limiting portion, and an opening of the terrace-shaped flange is defined as a second limiting snap-in. The second limiting snap-in is consistent with the first limiting snap-in. Then, the movement of the sealing component in the first receiving cavity / the second receiving cavity is limited by the first limiting portion or the second limiting portion.

[0014] Still further preferably, when the sealing assembly is limited by the first limiting portion, the first branch pipeline corresponding to the main oil supply port / the second branch pipeline corresponding to the main oil return port is closed, and the first branch pipeline corresponding to the auxiliary oil supply port / the second branch pipeline corresponding to the auxiliary oil return port is connected; when the sealing assembly is limited by the second limiting portion, the first branch pipeline corresponding to the auxiliary oil supply port / the second branch pipeline corresponding to the auxiliary oil return port is closed, and the first branch pipeline corresponding to the main oil supply port / the second branch pipeline corresponding to the main oil return port is connected.

[0015] Further preferably, the conversion valve also includes: two motors, the two motors respectively corresponding to the two sealing assemblies; two transmission structures, which are connected to the motors and driven by the motors; two bracket assemblies, which are connected to the transmission structures, and the two sealing assemblies are fixed on the bracket assemblies, wherein when the motor is started, the transmission structure drives the bracket assembly, so that the sealing assembly thereon moves in the first accommodating cavity or the second accommodating cavity along a direction perpendicular to the extension direction of the oil supply pipeline or the oil return pipeline, and moves until it is limited by the first limiting portion or the second limiting portion.

[0016] Still further preferably, the transmission structure converts the rotational motion of the motor into linear motion of the bracket assembly along the extension direction of the first accommodating cavity / the second accommodating cavity, and the transmission structure includes a transmission screw, which is connected to the motor shaft and has a trapezoidal thread formed on the transmission screw.

[0017] Still further preferably, an anti-lock device is arranged between the transmission structure and the motor, and the anti-lock device includes a driving block arranged between the motor shaft and the transmission screw, and two spring plates fixed in the driving block and pressing the transmission screw and the driving block tightly, and the motor shaft rotates to drive the driving block and the transmission screw to move, wherein, when the transmission screw is stuck and / or the rotational force is greater than the elastic force of the spring plates, the spring plates are deformed outward and cause the transmission screw to separate from the driving block.

[0018] Still further preferably, the bracket assembly comprises a frame body and a machine shaft, the sealing assembly is fixedly arranged on the outside of the machine shaft, anti-slip teeth are formed on the shaft wall of the machine shaft, and an anti-slip buckle is formed between the sealing assembly and the machine shaft through the anti-slip teeth, wherein a buckle is also provided on the machine shaft, and an assembly groove is formed in the buckle, the notch shape of the assembly groove is consistent with the shape of the machine shaft, and the notches on both sides of the assembly groove are bent inwardly, so that when the machine shaft is set in the assembly groove, it is limited by the notch of the assembly groove.

[0019] Preferably, the sealing assembly includes at least one long straight slider connected to the machine shaft, and sealing rings fixed to both ends of the slider, wherein the two ends of the slider respectively extend toward the outside of the slider and form a clamping portion bent toward the other end of the slider, and two annular spring seats corresponding to the two clamping portions are also provided on the side wall of the slider, and a return spring is provided at the bottom of each spring seat, and the spring seat extends toward the outside of the slider and bends toward the clamping portion corresponding thereto, so that a receiving portion is formed between the spring seat and the clamping portion, and the sealing ring is arranged in the receiving portion.

[0020] Due to the adoption of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] 1. Connect the main fuel tank supply pipe and the auxiliary fuel tank supply pipe to the engine fuel supply pipe to form a fuel supply pipe, and connect the main fuel tank return pipe and the auxiliary fuel tank return pipe to the engine fuel return pipe to form a fuel return pipe, so as to separate the fuel supply pipe and the fuel return pipe. By moving the sealing components respectively arranged in the fuel supply pipe and the fuel return pipe in the pipe, the connection and disconnection between the engine fuel supply pipe and the main fuel tank supply pipe and the auxiliary fuel tank supply pipe, as well as the passage between the engine fuel return pipe and the main fuel tank return pipe and the auxiliary fuel tank return pipe are controlled, and then the fuel supply pipe and the fuel return pipe are independently controlled, so that the main fuel tank or the auxiliary fuel tank supplies fuel to the engine independently, and the main fuel tank or the auxiliary fuel tank returns fuel to the engine independently, so as to avoid the mixing of fuel and cause engine operation failure;

[0022] 2. Both the oil supply pipeline and the oil return pipeline include a main pipeline and two branch pipelines forming a tee with the main pipeline. A receiving chamber is formed between the main pipeline and the branch pipeline. The sealing component moves in the receiving chamber along the extending direction of the receiving chamber until it is limited by the fixed base in the receiving chamber or the table-shaped flange on the inner wall of the receiving chamber, thereby controlling the opening or closing of each branch pipeline. The sealing component and the machine shaft are undercut to effectively prevent the sealing component from falling off during movement;

[0023] 3. Two motors are used to control the sealing components of the corresponding oil supply pipeline and oil return pipeline respectively. In this way, while realizing independent control of the oil supply pipeline and the oil return pipeline, the two motors are operated in a distributed manner, replacing the existing technology of controlling the opening or closing of four valve ports by the rotation angle of a single motor, which significantly improves the efficiency of valve conversion, and then improves the switching efficiency of the main and auxiliary oil tanks, and increases the 400 milliseconds in the existing technology to 45 milliseconds;

[0024] 4. The transmission structure converts the rotational motion of the motor into the linear motion of the bracket assembly along the extension direction of the receiving cavity, and the transmission screw with trapezoidal thread is introduced into the transmission structure to replace the ordinary thread structure of the screw in the prior art, so that under low temperature climate conditions, the resistance of the seal when the motor rotates to drive the linear motion is reduced, thereby reducing the wear and tear between the transmission structure, so that the overall service life of the transmission structure and the conversion valve can be extended;

[0025] 5. An anti-lock device is added between the transmission structure and the motor. The anti-lock device is composed of a driving block arranged between the motor shaft and the transmission screw and a spring fixed in the driving block that presses the transmission screw and the driving block. When the motor shaft rotates to drive the driving block and the transmission screw to move, when the transmission screw is stuck, or the rotational force of the motor shaft is greater than the spring force of the spring, the spring deforms outward to separate the transmission screw from the driving block, so that the driving block and the motor shaft can rotate by themselves, preventing the large current generated when the motor is blocked from affecting the conversion valve and equipment;

[0026] 6. A buckle is added to the machine shaft to ensure the position of the machine shaft and prevent it from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram showing a front view structure of one side of the oil supply port and the oil return port in a dual-motor delayed oil return conversion valve described in a preferred embodiment of the present invention;

[0028] Figure 2 A schematic diagram showing Figure 1 The structure of the main and auxiliary oil supply ports and the main and auxiliary oil return ports of the dual-motor delayed oil return conversion valve described in the preferred embodiment shown;

[0029] Figure 3 A top view showing Figure 1 A top schematic diagram of a dual-motor delayed oil return conversion valve described in a preferred embodiment shown;

[0030] Figure 4 is a cross-sectional view showing Figure 3 Cross-sectional structure in the middle AA direction;

[0031] Figure 5 is a cross-sectional view showing Figure 2 Cross-sectional structure in the middle DD direction;

[0032] Figure 6 is a cross-sectional view showing Figure 2 Cross-sectional structure in the mid-CC direction;

[0033] Figure 7 This is a partial enlarged view showing Figure 4The local enlarged structure of part B in the middle;

[0034] Figure 8 A top view showing Figure 7 The top structure of the anti-lock brake system;

[0035] Fig. 9 is a schematic diagram showing the structure of the crankshaft in the preferred embodiment of the present invention;

[0036] Fig.10 is a schematic diagram showing the structure of the sealing assembly in the preferred embodiment of the present invention;

[0037] Fig.11 is a schematic diagram showing the anti-drop buckle provided on the machine shaft in the preferred embodiment;

[0038] Fig.12 Schematic diagram showing an equivalent circuit of a control structure of a dual-motor delayed oil return conversion valve described in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following will describe an embodiment of a dual motor delayed oil return conversion valve according to the present invention with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims. In addition, in this specification, the drawings are not drawn to scale and the same reference numerals represent the same parts.

[0040] It should be noted that the expressions “first” and “second” used in the embodiments of the present invention are intended to distinguish two non-identical entities with the same name or non-identical parameters. It can be seen that “first” and “second” are only for the convenience of expression and should not be understood as limitations on the embodiments of the invention. The subsequent embodiments will not explain this one by one.

[0041] In a preferred embodiment of the present invention, the dual-motor delayed oil return conversion valve is formed by an upper and lower valve body. Figure 1 It is a schematic diagram showing the main view structure of the oil supply port and the oil return port on one side of the dual-motor delayed oil return conversion valve described in a preferred embodiment of the present invention. Figure 2 A schematic diagram showing Figure 1 The structure of the main and auxiliary oil supply ports and the main and auxiliary oil return ports on one side of the dual-motor delayed oil return conversion valve described in the preferred embodiment shown. Figure 3 A top view showing Figure 1 The top schematic diagram of the dual motor delayed oil return conversion valve described in the preferred embodiment shown. Figure 1In this preferred embodiment, the upper valve body 10 includes a wiring harness interface 11 and a conversion valve control unit integrated in the upper valve body 10, and two openings are formed on one side surface of the lower valve body 20, namely, an oil supply port 21 and an oil return port 22. Figure 2 Four openings are formed on the other side surface of the lower valve body 20, namely the main oil supply port 23, the auxiliary oil supply port 24, the main oil return port 25 and the auxiliary oil return port 26. Figure 1 and Figure 2 In this embodiment of the present invention, the oil supply port 21 is on the same side as the main oil supply port 23 and the auxiliary oil supply port 24, and the oil return port 22 is on the same side as the main oil return port 25 and the auxiliary oil return port 26. In actual assembly, the oil supply port 21 is connected to the engine oil supply pipe, the main oil supply port 23 is connected to the main fuel tank oil supply pipe, and the auxiliary oil supply port 24 is connected to the auxiliary fuel tank oil supply pipe, so as to realize the connection of the engine oil supply pipe to the main fuel tank oil supply pipe and the auxiliary fuel tank oil supply pipe respectively. In this way, the engine oil supply pipe, the main oil tank oil supply pipe, and the auxiliary oil tank oil supply pipe form an oil supply pipeline; accordingly, the return oil port 22 is connected to the engine oil return pipe, the main oil return port 25 is connected to the main oil tank oil return pipe, and the auxiliary oil return port 26 is connected to the auxiliary oil tank oil return pipe, so that the engine oil return pipe is connected to the main oil tank oil return pipe and the auxiliary oil tank oil return pipe respectively, so that the engine oil return pipe, the main oil tank oil return pipe, and the auxiliary oil tank oil return pipe form an oil return pipeline. It can be understood that in the embodiment of the present invention, it should be possible to control the opening or closing of the above-mentioned branch oil pipes to control the main oil tank or the auxiliary oil tank to supply oil to the engine, or to control the engine to return oil to the main oil tank or the auxiliary oil tank.

[0042] Figure 4 is a cross-sectional view showing Figure 3 Cross-sectional structure along the AA direction. Figure 5 is a cross-sectional view showing Figure 2 Cross-sectional structure in the middle DD direction. Figure 6 is a cross-sectional view showing Figure 2 In the embodiment of the present invention, the transmission structure is driven by the rotation of the motor to move the sealing component in the oil supply pipeline or the oil return pipeline. When the sealing component moves to the limit position, the opening or closing of the corresponding pipeline is controlled. Figures 4 to 6 In this preferred embodiment, two motors 12 are included, corresponding to the oil supply pipeline and the oil return pipeline respectively. Each motor controls the movement of the corresponding sealing assembly 30 to achieve independent control of the oil supply pipeline and the oil return pipeline. Figure 4The motor shaft 121 of the motor 12 is connected to the transmission structure 40, and the transmission structure 40 converts the rotational motion of the motor shaft 121 into the linear motion of the sealing assembly. In this embodiment, the rotation of the motor shaft 121 drives the sealing assembly 30 to move up and down. Obviously, in other embodiments of the present invention, the relative movement direction of the sealing assembly 30 to the motor shaft 121 can also be adjusted according to the different designs of the pipeline. For example, for a vertical pipeline, the motor can be arranged horizontally so that the motor drives the sealing assembly to move horizontally, etc. The embodiments of the present invention should not be limited to the relative movement direction of the motor or the sealing assembly.

[0043] Figure 7 This is a partial enlarged view showing Figure 4 The local enlarged structure of part B in the figure. Figure 7 As shown, in this preferred embodiment, the method for converting the rotational motion of the motor shaft 121 is to set a driving block 42 between the motor shaft 121 and the driving screw 41 of the transmission structure 40, and connect the motor shaft 121 and the driving block 42 as a whole. When the motor shaft 121 rotates, the driving block 42 is driven to rotate, and a threaded connection is formed between the driving block 42 and the driving screw 41, so that the rotation of the driving block 42 is converted into the axial movement of the driving screw 41. Figure 8 A top view showing Figure 7 The top structure of the anti-lock braking system. Figure 8 In order to prevent the motor shaft 121 from locking during rotation, two springs 43 can be fixed on the driving block 42. The two springs 43 are respectively located on both sides of the transmission screw 41 and press the transmission screw 41 and the driving block 42 tightly. In this way, when the motor shaft 121 rotates to drive the driving block 42 and the transmission screw 41 to move until the transmission screw 41 is stuck, and / or the rotation force of the motor shaft 121 is greater than the elastic force of the spring 43, the spring deforms toward the outside of the transmission screw 41 and separates the transmission screw 41 from the driving block 42, so that the driving block and the motor shaft can rotate by themselves, preventing the large current generated when the motor is blocked from affecting the conversion valve and the equipment, and forming an anti-locking structure. It is worth mentioning that in a preferred embodiment of the present invention, a Tr3.5 lead screw with a trapezoidal thread is introduced into the transmission structure as a transmission screw, replacing the ordinary thread structure of the screw in the prior art, so that under low temperature climate conditions, the resistance of the seal when the motor rotates to drive the linear motion is reduced, thereby reducing the wear and consumption between the transmission structure, so that the overall service life of the transmission structure and the conversion valve can be extended.

[0044] Look back Figure 4The driving screw 41 is connected to the bracket assembly 50, and the bracket assembly 50 includes a long straight frame and a machine shaft fixed on the frame. The axial movement of the driving screw 41 drives the bracket assembly 50 to move in the axial direction of the driving screw 41, and the two sealing assemblies 30 are symmetrically arranged on the two bracket assemblies 50. In this embodiment, the up and down movement of the bracket assembly 50 in the valve body drives the two sealing assemblies 30 to move up and down.

[0045] Look back Figure 6 In the cross-sectional view at another angle, it can be seen that inside the lower valve body 20, the oil supply pipeline is composed of a main pipeline extending to the oil supply port 21 and two branch pipelines extending to the main oil supply port 23 and the auxiliary oil supply port 24 respectively. In this embodiment, see Figure 5 , the oil return pipeline is symmetrically arranged with the oil supply pipeline, that is, the oil return pipeline is composed of a main pipeline extending to the oil return port 22 and two branch pipelines extending to the main oil return port 25 and the auxiliary oil return port 26 respectively, then the main pipeline corresponding to the oil supply port 21 is defined as the first main pipeline 61, the main pipeline corresponding to the oil return port 22 is defined as the second main pipeline 62, the branch pipeline corresponding to the main oil supply port 23 and the auxiliary oil supply port 24 is defined as the first branch pipeline 63, and the branch pipeline corresponding to the main oil return port 25 and the auxiliary oil return port 26 is defined as the second branch pipeline 64, then refer to 5 and Figure 6 In the lower valve body 20, the first main pipeline 61 extends toward the two first branch pipelines 63 corresponding to the main oil supply port 23 and the auxiliary oil supply port 24, and forms a three-way cavity between the two first branch pipelines 63, which is defined as a first receiving cavity 70. Correspondingly, the second main pipeline 62 extends toward the two second branch pipelines 64 corresponding to the main oil return port 25 and the auxiliary oil return port 26, and forms a three-way second receiving cavity 80 between the two second branch pipelines 64. See FIG. Figures 4 to 6 The two sealing components 30 are respectively disposed in the first receiving cavity 70 and the second receiving cavity 80 , and can move up and down along the extending direction of the receiving cavity with the transmission of the bracket component 50 .

[0046] See also Figures 4 to 6A fixed base 90 is provided in the first receiving chamber 70, on one side of the first branch pipeline 63 corresponding to the main oil supply port 23, and in the second receiving chamber 80, on one side of the second branch pipeline 64 corresponding to the main oil return port 25. An opening is formed on one side of the fixed base 90. According to the different cavities to which it belongs, a base passage 91 is formed in the fixed base 90 through the opening formed on one side thereof, which passes through the corresponding first branch pipeline or second branch pipeline 64. A first limiting bayonet 92 which is consistent with the extending direction of the first receiving chamber 70 or the second receiving chamber 80 is provided on one side of the base passage 91 close to the first main pipeline 61 or the second main pipeline 62, and a first limiting portion 93 is formed on both sides of the limiting opening on the fixed base 90. The first limiting portion 93 is limited by the first limiting portion 93 after passing through the first limiting bayonet 92 when the sealing assembly 30 moves toward one end thereof. Correspondingly, a platform-shaped flange is formed on the inner wall of the first receiving cavity 70 at the connection position where the first receiving cavity 70 and the first main pipeline 61 meet and on the side away from the fixed base 90. Symmetrically, a similar platform-shaped flange is also formed on the inner wall of the second receiving cavity 80 at the connection position where the second receiving cavity 80 and the second main pipeline 62 meet and on the side away from the fixed base 90. The platform-shaped flange is regarded as the second limiting portion 94, and the opening formed in the flange is defined as the second limiting bayonet 95. When the sealing assembly 30 moves toward the other end thereof, it passes through the second limiting bayonet 95 and is limited by the second limiting portion 94.

[0047] See also Figures 4 to 6In this preferred embodiment, the limiting process of the sealing assembly 30 is that when the sealing assembly 30 is limited by the first limiting portion 93, that is, when the sealing assembly 30 moves upward to the extreme position, the first branch pipeline 63 corresponding to the main oil supply port 23 / the second branch pipeline 64 corresponding to the main oil return port 25 is closed, and the first branch pipeline 63 corresponding to the auxiliary oil supply port 24 / the second branch pipeline 64 corresponding to the auxiliary oil return port 26 is opened; when the sealing assembly 30 is limited by the second limiting portion 94, that is, when the sealing assembly 30 moves downward to the extreme position, the first branch pipeline 63 corresponding to the auxiliary oil supply port 24 / the second branch pipeline 64 corresponding to the auxiliary oil return port 26 is closed, and the first branch pipeline 63 corresponding to the main oil supply port 23 / the second branch pipeline corresponding to the main oil return port 25 is opened. In actual working conditions, the first branch pipeline corresponding to the main oil supply port 23 is closed, and the first branch pipeline 63 corresponding to the auxiliary oil supply port 24 is opened, that is, under the current working condition, the auxiliary tank supplies oil to the engine; the second branch pipeline 64 corresponding to the main oil return port 25 is closed, and the second branch pipeline 64 corresponding to the auxiliary oil return port 26 is opened, that is, under the retaining wall working condition, the engine returns oil to the auxiliary tank; the first branch pipeline 63 corresponding to the auxiliary oil supply port 24 is closed, and the first branch pipeline 63 corresponding to the main oil supply port 23 is opened, that is, under the current working condition, the main tank supplies oil to the engine; the second branch pipeline 64 corresponding to the auxiliary oil return port 26 is closed, and the second branch pipeline corresponding to the main oil return port 23 is opened, that is, under the current working condition, the engine returns oil to the main tank.

[0048] Fig. 9 It is a schematic diagram showing the structure of the crankshaft in the preferred embodiment of the present invention. Fig.10 FIG. 2 is a schematic diagram showing the structure of the sealing assembly in the preferred embodiment of the present invention. Fig. 9 and Fig.10 In the preferred embodiment of the present invention, the sealing assembly 30 is disposed on the outer side of the shaft 51 of the bracket assembly 50, see Fig. 9 , the shaft 51 is formed with an anti-slipping tooth 52 on the shaft wall, and the inner wall of the sealing assembly 30 is formed with an inverted tooth (not shown) that meshes with the anti-slipping tooth 52. Fig.10 When the sealing assembly 30 is connected to the crankshaft 51 , an anti-dropping buckle is formed between the sealing assembly 30 and the crankshaft 51 . Fig.11 FIG. 2 is a schematic diagram showing the anti-drop buckle provided on the shaft in the preferred embodiment. Fig.11 As shown, an assembly groove 531 for installing the shaft 51 is formed in the buckle 53. The shape of the groove 531 should be consistent with the outward expansion of the shaft 51, and the grooves 532 on both sides of the assembly groove 531 are bent inwardly. When the shaft 51 is set in the assembly groove 531, the bent grooves 532 are limited to make the movement of the shaft 51 more stable and accurate.

[0049] The sealing assembly 30 may be composed of an integrally formed long straight slider and two sealing rings at both ends of the slider, or may be composed of two symmetrically arranged sliders and a sealing ring arranged on each slider. Fig.10 In this preferred embodiment, the two sliders 31 are symmetrically arranged. An annular clamping portion 311 extending toward the outside of the slider and bending toward the other end of the slider 31 is formed on one end of each slider 31 away from the other slider 31. At the same time, an annular spring seat 32 opposite to the clamping portion 311 is fixed on the side wall of the slider. The spring seat 32 is positioned by a return spring 33, and see Fig.10 , the spring seat 32 also extends toward the outside of the slider 31 and bends toward the corresponding clamping portion 311, so that a receiving place for receiving the sealing ring 34 is formed between the curved inner surface of the spring seat 32 and the curved inner surface of the clamping portion 311, and when the sealing ring 34 is assembled, it is clamped and fixed by the curved inner surface of the clamping portion 311 and the curved inner surface of the spring seat 32. Then, when the sealing assembly 30 slides, the outer expansion of the sealing ring 34 contacts and squeezes the surface of the first limiting portion 93 or the second limiting portion 94, so that the sealing ring 34 is limited by the first limiting portion 93 or the second limiting portion 94, and then the pipeline is opened or closed.

[0050] Fig.12 FIG. 1 is a schematic diagram showing an equivalent circuit of a control structure of a dual-motor delayed oil return conversion valve according to a preferred embodiment of the present invention. Fig.12 The operation of the two motors is controlled by the single chip microcomputer 101 in the conversion valve control unit 100. The two motors are defined as the fuel supply motor 102 and the fuel return motor 103. The fuel supply motor 102 is connected to the main fuel tank sensor 104, the auxiliary fuel tank sensor 105 and the fuel gauge 106. The vehicle cab switch 107 sends a command to the single chip microcomputer 101 to make the fuel supply motor 12 or the fuel return motor 12 work with a delayed time.

[0051] During specific driving, when it is necessary to switch from the main tank to the auxiliary tank, the auxiliary tank switch is controlled by the cab switch 107, and a signal is sent to the conversion valve control unit 100, which first powers on the oil supply motor 102 and starts it; the oil supply motor 102 drives the anti-lock braking device, the anti-lock braking device is driven by the transmission knot 40, the transmission knot 40 drives the bracket assembly 50 to move upward, and the sealing assembly 30 moves upward accordingly at the same time. When the sealing assembly 30 moves to the upper limit position, it is limited by the first limiting part 93. At this time, the pipeline between the auxiliary tank oil supply port 21 of the lower valve body 20 and the oil supply port 21 is connected to realize the auxiliary tank oil supply; after the oil supply port is converted, the control unit 100 starts timing, and while timing, the control unit 100 will output a negative signal to the cab , the other end of the signal light in the cab is connected to the positive connection (normally on). When there is a negative signal output, the indicator light comes on. After completing the set interval time, the control unit 100 energizes the return oil motor 103, and the return oil motor 103 (forward rotation) drives the anti-lock device on one side of the return oil pipeline, and the anti-lock device drives the transmission structure, and the transmission structure drives the bracket assembly to move. When the bracket assembly 50 on one side of the return oil pipeline moves toward the upper end, it also drives the sealing assembly 30 on one side of the return oil pipeline to move upward. When the sealing assembly 30 moves to the upper limit position, it is limited by the first limiting part 93. At this time, the pipeline between the auxiliary oil tank return port 22 of the lower valve body 20 and the return port 22 is connected, so that the unused oil in the engine returns to the auxiliary oil tank; at the same time, the indicator light in the cab goes out.

[0052] When it is necessary to switch from the auxiliary tank to the main tank, the cab switch 107 controls the sending of a signal, and the control unit 100 energizes the fuel supply motor 102 (reverses) to drive the anti-lock device on one side of the fuel supply pipeline, and the anti-lock device drives the transmission knot 40 on this side, and the transmission knot 40 drives the bracket assembly 50 on this side to move downward. When the bracket assembly 50 moves to the lower end, the sealing assembly 30 on this side also moves downward at the same time. When the sealing assembly 30 moves to the lower end limit position, that is, it is limited by the second limiting portion 94 in the accommodating cavity on this side, at this time, the pipeline between the lower valve body 20 and the main tank fuel supply port 21 is connected, so that the main tank supplies fuel to the engine; the fuel supply port is completed After the conversion, the control unit 100 starts timing, and after the set interval time is completed, the control unit 100 starts the oil return motor again; the oil return motor 103 (reverse) drives the anti-lock device on one side of the oil return pipeline, and the anti-lock device drives the transmission knot 40 on this side, and the transmission knot 40 drives the bracket assembly 50 on this side to move downward. When the bracket assembly 50 moves to the lower end, it also drives the sealing assembly 30 on this side to move downward. When the sealing assembly 30 moves to the lower end limit position, that is, it is limited by the second limiting portion 94 in the accommodating cavity on this side, at this time, the pipeline between the main oil tank return port 22 of the lower valve body (7) and the oil return port 22 is connected, so as to realize the delayed oil return of the engine to the main oil tank.

[0053] Due to the adoption of the above technical solution, compared with the prior art, the present invention has the following beneficial technical effects:

[0054] 1. Connect the main fuel tank supply pipe and the auxiliary fuel tank supply pipe to the engine fuel supply pipe to form a fuel supply pipe, and connect the main fuel tank return pipe and the auxiliary fuel tank return pipe to the engine fuel return pipe to form a fuel return pipe, so as to separate the fuel supply pipe and the fuel return pipe. By moving the sealing components respectively arranged in the fuel supply pipe and the fuel return pipe in the pipe, the connection and disconnection between the engine fuel supply pipe and the main fuel tank supply pipe and the auxiliary fuel tank supply pipe, as well as the passage between the engine fuel return pipe and the main fuel tank return pipe and the auxiliary fuel tank return pipe are controlled, and then the fuel supply pipe and the fuel return pipe are independently controlled, so that the main fuel tank or the auxiliary fuel tank supplies fuel to the engine independently, and the main fuel tank or the auxiliary fuel tank returns fuel to the engine independently, so as to avoid the mixing of fuel and cause engine operation failure;

[0055] 2. Both the oil supply pipeline and the oil return pipeline include a main pipeline and two branch pipelines forming a tee with the main pipeline. A receiving chamber is formed between the main pipeline and the branch pipeline. The sealing component moves in the receiving chamber along the extending direction of the receiving chamber until it is limited by the fixed base in the receiving chamber or the table-shaped flange on the inner wall of the receiving chamber, thereby controlling the opening or closing of each branch pipeline. The sealing component and the machine shaft are undercut to effectively prevent the sealing component from falling off during movement;

[0056] 3. Two motors are used to control the sealing components of the corresponding oil supply pipeline and oil return pipeline respectively. In this way, while realizing independent control of the oil supply pipeline and the oil return pipeline, the two motors are operated in a distributed manner, replacing the existing technology of controlling the opening or closing of four valve ports by the rotation angle of a single motor, which significantly improves the efficiency of valve conversion, and then improves the switching efficiency of the main and auxiliary oil tanks, and increases the 400 milliseconds in the existing technology to 45 milliseconds;

[0057] 4. The transmission structure converts the rotational motion of the motor into the linear motion of the bracket assembly along the extension direction of the receiving cavity, and the transmission screw with trapezoidal thread is introduced into the transmission structure to replace the ordinary thread structure of the screw in the prior art, so that under low temperature climate conditions, the resistance of the seal when the motor rotates to drive the linear motion is reduced, thereby reducing the wear and tear between the transmission structure, so that the overall service life of the transmission structure and the conversion valve can be extended;

[0058] 5. An anti-lock device is added between the transmission structure and the motor. The anti-lock device is composed of a driving block arranged between the motor shaft and the transmission screw and a spring fixed in the driving block that presses the transmission screw and the driving block. When the motor shaft rotates to drive the driving block and the transmission screw to move, when the transmission screw is stuck, or the rotational force of the motor shaft is greater than the spring force of the spring, the spring deforms outward to separate the transmission screw from the driving block, so that the driving block and the motor shaft can rotate by themselves, preventing the large current generated when the motor is blocked from affecting the conversion valve and equipment;

[0059] 6. A buckle is added to the machine shaft to ensure the position of the machine shaft and prevent it from falling off.

[0060] The present invention has been described in detail above, and the description of the embodiments is only used to help understand the method and core idea of ​​the present invention, and its purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-motor delayed oil return conversion valve, characterized in that: The conversion valve comprises: The fuel supply pipeline connects the engine fuel supply pipe to the main fuel tank fuel supply pipe and the auxiliary fuel tank fuel supply pipe respectively; An oil return pipeline, wherein the engine oil return pipeline is connected to the main oil tank oil return pipeline and the auxiliary oil tank oil return pipeline respectively; and two sealing components respectively arranged in the oil supply pipeline and the oil return pipeline, wherein: controlling the sealing assembly in the oil supply pipeline to move in a direction perpendicular to the extending direction of the oil supply pipeline so that the passage between the engine oil supply pipeline and the main oil tank oil supply pipeline or the auxiliary oil tank oil supply pipeline is opened or closed, or controlling the sealing assembly in the oil return pipeline to move in a direction perpendicular to the extending direction of the oil return pipeline so that the passage between the engine oil return pipeline and the main oil tank oil return pipeline or the auxiliary oil tank oil return pipeline is opened or closed, It also includes two motors, which correspond to the two sealing assemblies respectively; two transmission structures, which are connected to the motors and driven by the motors, the transmission structure including a transmission screw, which is connected to the motor shaft, and a trapezoidal thread is formed on the transmission screw, an anti-lock device is arranged between the transmission structure and the motor, the anti-lock device includes a driving block arranged between the motor shaft and the transmission screw, and two elastic sheets fixed in the driving block and pressing the driving screw and the driving block, the motor shaft rotates to drive the driving block and the transmission screw to move, wherein, when the transmission screw is stuck and / or the rotational force is greater than the elastic force of the elastic sheet, the elastic sheet deforms outward and causes the transmission screw to separate from the driving block.

2. The dual-motor delayed oil return conversion valve according to claim 1 is characterized in that: The oil supply pipeline includes: a fuel supply port connected to the engine fuel supply pipe, a main fuel supply port connected to the main fuel tank fuel supply pipe, and an auxiliary fuel supply port connected to the auxiliary fuel tank fuel supply pipe; The oil return pipeline includes: An oil return port connected to the engine oil return pipe, a main oil return port connected to the main oil tank oil return pipe, and an auxiliary oil return port connected to the auxiliary oil tank oil return pipe.

3. The dual-motor delayed oil return conversion valve according to claim 2 is characterized in that: The oil supply pipeline is composed of a first main pipeline extending to the oil supply port, and two first branch pipelines extending to the main oil supply port and the auxiliary oil supply port respectively, and the oil return pipeline is composed of a second main pipeline extending to the oil return port, and two second branch pipelines extending to the main oil return port and the auxiliary oil return port respectively, wherein, The first main pipeline extends respectively in the direction of the two first branch pipelines and connects the two first branch pipelines, then a three-way cavity is formed between the first main pipeline and the two first branch pipelines, and the cavity is defined as a first receiving cavity. The second main pipeline extends respectively in the direction of the two second branch pipelines and connects the two second branch pipelines, then a three-way cavity is formed between the second main pipeline and the two second branch pipelines, and the cavity is defined as a second receiving cavity, and the two sealing components are respectively movably arranged in the first receiving cavity and the second receiving cavity.

4. The dual-motor delayed oil return conversion valve according to claim 3 is characterized in that: A fixed base is provided in the first receiving chamber, on one side of the first branch pipeline corresponding to the main oil supply port, and in the second receiving chamber, on one side of the second branch pipeline corresponding to the main oil return port, respectively. A base passage corresponding to the first branch pipeline / second branch pipeline passing therethrough is formed in the fixed base. A first position limiting bayonet consistent with the extending direction of the first receiving chamber / second receiving chamber is provided on one side of the base passage close to the first main pipeline / second main pipeline. First position limiting parts are formed on both sides of the position limiting bayonet on the fixed base, wherein: A terrace-shaped flange is formed on the inner cavity wall of the first receiving cavity, at a side where the first receiving cavity is connected to the first main pipeline and away from the fixed base, and on the inner cavity wall of the second receiving cavity, at a side where the second receiving cavity is connected to the second main pipeline and away from the fixed base. The terrace-shaped flange is defined as a second limiting portion, and an opening of the terrace-shaped flange is defined as a second limiting snap-in. The second limiting snap-in is consistent with the first limiting snap-in, and the movement of the sealing component in the first receiving cavity / the second receiving cavity is limited by the first limiting portion or the second limiting portion.

5. The dual-motor delayed oil return conversion valve according to claim 4 is characterized in that: When the sealing assembly is limited by the first limiting portion, the first branch pipeline corresponding to the main oil supply port / the second branch pipeline corresponding to the main oil return port is closed, and the first branch pipeline corresponding to the auxiliary oil supply port / the second branch pipeline corresponding to the auxiliary oil return port is connected; When the sealing assembly is limited by the second limiting portion, the first branch pipeline corresponding to the auxiliary oil supply port / the second branch pipeline corresponding to the auxiliary oil return port is closed, and the first branch pipeline corresponding to the main oil supply port / the second branch pipeline corresponding to the main oil return port is connected.

6. The dual-motor delayed oil return conversion valve according to claim 5 is characterized in that: The conversion valve further comprises: Two bracket assemblies are connected to the transmission structure, and the two sealing assemblies are fixedly mounted on the two bracket assemblies, wherein: The motor is started, and the transmission structure drives the bracket assembly, so that the sealing assembly thereon moves in the first accommodating cavity or the second accommodating cavity along a direction perpendicular to the extension direction of the oil supply pipeline or the oil return pipeline, and moves until it is limited by the first limiting portion or the second limiting portion.

7. The dual-motor delayed oil return conversion valve according to claim 6 is characterized in that: The transmission structure converts the rotational motion of the motor into a linear motion of the bracket assembly along the extension direction of the first receiving cavity / the second receiving cavity.

8. The dual-motor delayed oil return conversion valve according to claim 7 is characterized in that: The support assembly includes a frame and a shaft, the sealing assembly is fixedly arranged on the outer side of the shaft, an anti-slipping tooth is formed on the shaft wall of the shaft, and an anti-slipping undercut is formed between the sealing assembly and the shaft through the anti-slipping tooth, wherein: The shaft is also provided with a buckle, and an assembly groove is formed in the buckle. The shape of the notch of the assembly groove is consistent with the shape of the shaft, and the notches on both sides of the assembly groove are bent inwardly. When the shaft is set in the assembly groove, it is limited by the notch of the assembly groove.

9. The dual-motor delayed oil return conversion valve according to claim 8, characterized in that: The sealing assembly includes at least one long straight slider connected to the shaft, and sealing rings fixed at both ends of the slider, wherein: The two ends of the slider extend toward the outside of the slider respectively and form a clamping part bent toward the other end of the slider. The side wall of the slider is also provided with two annular spring seats corresponding to the two clamping parts respectively. A return spring is provided at the bottom of each spring seat. The spring seat extends toward the outside of the slider and bends toward the clamping part corresponding thereto, so that a receiving place is formed between the spring seat and the clamping part, and the sealing ring is arranged in the receiving place.

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