A pumping unit structure

Abstract

The utility model discloses a pumping unit structure relates to automobile maintenance pumping equipment field, aims at solving the problem of complex, cumbersome operation of existing pumping unit liquid discharge structure. The structure includes jar body, pipe fitting, sealing piston, connecting rod and limit sleeve, and pipe fitting is fixed with jar body and is equipped with intercommunication mouth, and there is sealing boss below intercommunication mouth, and sealing piston moves up and down below sealing boss, and connecting rod moves up and down and is arranged in pipe fitting and rotates, and lower end is connected with sealing piston, and upper end extends to limit sleeve through pipe fitting and connects operating rod, and limit sleeve is equipped with inclined groove, and both ends of inclined groove are connected with first and second limit groove respectively, and operating rod extends to outside through inclined groove and can remove to two limit grooves. When operating rod is in first limit groove, sealing piston separates with sealing boss, and when in second limit groove, both adhere. The structure simplifies components, and operation is convenient, and sealing is stable, can improve maintenance operation efficiency, reduces production cost, and is applicable to various automobile maintenance pumping scene.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction technology for automobile maintenance, and in particular to an oil extraction machine structure. Background Technology

[0002] In automotive maintenance, the extraction of fluids such as engine oil and transmission fluid is a crucial process. Vacuum adsorption oil extraction technology has become the mainstream solution due to its fast extraction speed, minimal residue, and minimal damage. Its core principle is: after evacuating the sealed tank, the fluid is connected to the vehicle's fluid chamber via a pipeline, and the pressure difference forces the fluid into the tank.

[0003] After oil extraction is complete, it needs to be discharged into a collection bucket through the drain port at the bottom of the tank. Currently, the mainstream drain port control structure is a "lever-connecting rod-piston" transmission: a hinged seat is installed on the tank, and the operating lever is hinged to it; the operating lever has a connecting pin, and a slotted pin is cut at the top of the connecting rod, into which the connecting pin is inserted; the bottom of the connecting rod is connected to the drain port piston, which is sealed to the drain port. Pressing or moving the operating lever moves the connecting rod and piston through the connecting pin and slotted pin, thus opening and closing the drain port. An additional locking structure is required to fix the position of the operating lever and prevent leakage.

[0004] However, this structure has obvious flaws:

[0005] Complex structure: It relies on multiple components such as hinge base, connecting pin, and strip pin groove, and has high fitting requirements. It is prone to transmission jamming or sealing failure due to dimensional deviation.

[0006] High cost: Each component needs to be processed individually, and additional quality inspection is required to ensure accuracy, which increases production costs;

[0007] Assembly is cumbersome: It requires multiple steps such as welding, pin connection, and component assembly, which is time-consuming and labor-intensive, and is prone to defects due to assembly errors. Utility Model Content

[0008] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pumping unit structure that reduces the number of parts, optimizes manufacturing costs, and streamlines the assembly process.

[0009] An oil pumping unit structure designed for this purpose includes a tank, pipe fittings, sealing piston, connecting rod, and limiting sleeve;

[0010] The pipe fitting is fixedly connected to the tank body; the lower end of the pipe fitting is open; the pipe fitting is provided with a communication port that communicates with the inside of the tank body; a sealing boss is provided below the communication port, and the sealing piston is provided below the sealing boss that moves up and down.

[0011] The connecting rod is movable up and down and rotatably disposed inside the pipe fitting. The lower end of the connecting rod is fixedly connected to the sealing piston, and the upper end of the connecting rod extends upward through the pipe fitting and is disposed inside the limiting sleeve. An operating rod is connected to the upper end of the connecting rod.

[0012] The limiting sleeve is provided with an inclined groove, the lower end of which is connected to a first limiting groove, and the upper end of which is connected to a second limiting groove; the operating rod extends through the inclined groove to the outside of the limiting sleeve; the operating rod can move to the first limiting groove or the second limiting groove.

[0013] When the operating lever is located in the first limiting groove, the sealing piston and the sealing boss separate from each other.

[0014] When the operating lever is located in the second limiting groove, the sealing piston and the sealing boss are in contact with each other.

[0015] Preferably, the linkage also includes an elastic element for applying a force to move the linkage upward.

[0016] Preferably, the elastic element is disposed inside the limiting sleeve.

[0017] Preferably, the upper surface of the tank is provided with a first opening, a sealing plug is provided in the first opening, and the upper end of the pipe is connected to the sealing plug.

[0018] The sealing plug is provided with a channel that runs vertically through it, and the upper end of the connecting rod extends upward through the channel.

[0019] Preferably, a limiting plate is provided at the upper end of the connecting rod, and the elastic element is a spring and is sleeved on the connecting rod between the limiting plate and the sealing plug.

[0020] Preferably, the sealing boss is disposed on the inner wall of the pipe fitting, and the sealing piston is disposed inside the pipe fitting and moves up and down.

[0021] Preferably, the lower surface of the tank is provided with a second opening, and the pipe extends into the second opening.

[0022] Preferably, the second opening is connected to a connector, and the interior of the connector is in communication with the interior of the pipe fitting;

[0023] The sealing boss is disposed within the joint; the sealing piston is disposed within the joint for vertical movement.

[0024] Preferably, the first limiting groove extends upward from the end near the inclined groove toward the end away from the inclined groove.

[0025] Preferably, the surface of the operating lever is provided with a soft layer.

[0026] This pumping unit structure, through innovative design of the drainage control components, effectively solves the industry pain points of complex, costly, and cumbersome assembly of existing "operating rod-connecting rod" drainage structures, and has several significant advantages, as follows:

[0027] Significantly simplified structure, reducing design and manufacturing complexity: This structure eliminates the independent hinge seats, strip pin grooves, and connecting pins found in existing technologies, directly fixing the pipe to the tank. The connecting rod integrates "up-down movement + rotation" functions within the pipe. Furthermore, the inclined groove, first limiting groove, and second limiting groove of the limiting sleeve replace the traditional locking structure, achieving an integrated "transmission + limiting" design. The entire system relies solely on core components, reducing the number of independent parts. This not only lowers the precision requirements for the fit between components but also avoids the dimensional deviation risks associated with multi-component machining, significantly simplifying the structural design and manufacturing process.

[0028] Convenient and efficient operation, improving maintenance efficiency: Workers only need to push the operating rod along the inclined groove of the limiting sleeve to achieve synchronous up-and-down movement and rotation of the connecting rod. When the operating rod slides into the first limiting groove, the sealing piston and sealing boss automatically separate, and the drain port opens quickly; when the operating rod slides into the second limiting groove, the sealing piston and sealing boss automatically engage, and the drain port closes precisely. The entire process requires no additional locking mechanism; a single step completes the "on / off + locking" process, effectively reducing operation time during maintenance, especially suitable for high-frequency oil extraction scenarios, and significantly improving overall work efficiency.

[0029] Reducing assembly steps significantly lowers production costs: In the assembly stage, only the core components need to be assembled sequentially. Compared to the multiple complex processes of the existing structure, the number of assembly steps is greatly reduced, saving manual assembly time. At the same time, due to the reduction in the number of components, the processing molds and quality inspection processes are also simplified accordingly, resulting in lower overall manufacturing costs and stronger market competitiveness. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 3 This is an exploded structural diagram of the present invention. Detailed Implementation

[0033] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0035] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0036] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0037] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0038] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0039] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0040] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] See Figures 1-3 An oil pumping unit structure includes a tank body 10, a pipe fitting 20, a sealing piston 30, a connecting rod 40, and a limiting sleeve 50; the pipe fitting 20 is fixedly connected to the tank body 10; the lower end of the pipe fitting 20 is open; the pipe fitting 20 is provided with a communication port 210 communicating with the interior of the tank body 10; a sealing boss 200 is provided below the communication port 210, and the sealing piston 30 is vertically movable and disposed below the sealing boss 200; the connecting rod 40 is vertically movable and rotatably disposed within the pipe fitting 20, the lower end of the connecting rod 40 is fixedly connected to the sealing piston 30, and the upper end of the connecting rod 40 extends upward through the pipe fitting 20 and is disposed within the limiting sleeve 50; The upper end of the connecting rod 40 is connected to an operating rod 400; the limiting sleeve 50 is provided with an inclined groove 510, the lower end of the inclined groove 510 is connected to a first limiting groove 520, and the upper end of the inclined groove 510 is connected to a second limiting groove 530; the operating rod 400 extends through the inclined groove 510 to the outside of the limiting sleeve 50; the operating rod 400 is movable to the first limiting groove 520 or the second limiting groove 530; when the operating rod 400 is located in the first limiting groove 520, the sealing piston 30 and the sealing boss 200 are separated from each other; when the operating rod 400 is located in the second limiting groove 530, the sealing piston 30 and the sealing boss 200 are in contact with each other.

[0042] The operation of this oil pumping unit revolves around three core stages: "oil extraction preparation - oil extraction - waste oil discharge". Each component works in precise coordination to achieve efficient and reliable oil processing. The core logic of the oil vacuum extraction is a mature, existing technology in the industry. This structure focuses on optimizing the control method of the drainage channel, the specific principle of which is as follows:

[0043] During the oil extraction preparation stage, it is essential to ensure the drainage channel is sealed. The operator pushes the operating rod upwards along the inclined groove of the limiting sleeve until it slides into the second limiting groove connected to the upper end of the inclined groove. At this point, the connecting rod, fixedly connected to the operating rod, moves upwards synchronously and rotates slightly. The sealing piston fixed at the lower end of the connecting rod moves upwards accordingly, ultimately fitting tightly against the sealing boss below the inner connection port of the pipe fitting, completely blocking the channels at both ends of the pipe fitting. Since the pipe fitting is fixedly connected to the tank and the connection port communicates with the inside of the tank, this sealing condition ensures that the tank forms a closed space; this is a prerequisite for subsequent vacuum extraction and provides the necessary sealing foundation for the application of existing vacuum extraction technology.

[0044] In the oil extraction stage, an external vacuum pump, using existing technology, is used to evacuate the inside of the tank, significantly lowering the internal pressure compared to atmospheric pressure in the vehicle's fluid chambers (such as the oil pan and transmission fluid chamber). Then, following standard vacuum oil extraction procedures, one end of the external extraction pipe is connected to the vehicle's fluid chamber, and the other end is connected to the sealed tank system via a fitting or a dedicated interface pre-installed in the tank. Utilizing the pressure difference between the tank and the vehicle's fluid chamber (the principle of this pressure difference driving oil flow is existing technology), the oil inside the vehicle is automatically driven to flow into the tank along the extraction pipe until extraction is complete. Throughout the extraction process, the sealing piston maintains a tight seal with the sealing boss, ensuring stable tank sealing performance and preventing leaks from affecting the normal operation of the existing vacuum extraction technology.

[0045] When waste oil needs to be discharged, the worker moves the operating lever downwards from the second limiting groove along the inclined groove. The operating lever drives the connecting rod to move downwards synchronously and rotate in the opposite direction. The sealing piston at the lower end of the connecting rod moves downwards with the connecting rod, gradually separating from the sealing boss and opening the drainage channel inside the pipe fitting. When the operating lever slides into the first limiting groove connected to the lower end of the inclined groove, the operating lever is limited and fixed, and the sealing piston and sealing boss remain in a stable separated state. The waste oil collected inside the tank flows naturally into the pipe fitting through the connecting port, and then flows downwards along the opening channels at the upper and lower ends of the pipe fitting, finally flowing into the waste oil collection container below. After the waste oil is discharged, the operating lever is pushed back into the second limiting groove, the sealing piston resets and fits against the sealing boss, and the tank is resealed, preparing for the next oil extraction using existing vacuum extraction technology, completing the entire oil extraction-discharge cycle.

[0046] See Figure 2 and Figure 3It also includes an elastic element 60, which applies an upward force to the connecting rod 40. By applying an upward force to the connecting rod 40, the elastic element 60 serves two purposes: firstly, when the operating rod 400 is located in the second limiting groove 530, it assists the connecting rod 40 in pushing the sealing piston 30 upward, ensuring a tight fit between the sealing piston 30 and the sealing boss 200, improving the sealing reliability of the tank 10, and preventing oil leakage during vacuum extraction or settling; secondly, when the operating rod 400 moves from the first limiting groove 520 to the second limiting groove 530, it provides upward assistance to the connecting rod 40, reducing the force required for the worker to push the operating rod 400, making the sealing reset operation easier, and reducing the impact on components during the operating rod's movement, thus extending the structural service life.

[0047] See Figure 2 and Figure 3 The elastic element 60 is disposed within the limiting sleeve 50. The elastic element 60 is intentionally disposed inside the limiting sleeve 50. This installation method utilizes the enclosed space structure of the limiting sleeve 50 to completely isolate the elastic element 60 from the external environment, effectively preventing foreign objects such as waste oil, dust, and metal shavings that may come into contact with the elastic element 60 during maintenance operations from adhering to or penetrating it. This prevents foreign objects from causing the elastic element 60 to become stuck, corrode, or lose its elasticity, ensuring its long-term stable operation.

[0048] See Figure 2 The upper surface of the tank body 10 is provided with a first opening 100, and a sealing plug 110 is provided inside the first opening 100. The upper end of the pipe fitting 20 is connected to the sealing plug 110. The sealing plug 110 is provided with a vertically penetrating channel, and the upper end of the connecting rod 40 extends upward through the channel. The first opening 100 on the upper surface of the tank body 10 provides an installation base for the sealing plug 110. The sealing plug 110 can seal the first opening 100 to ensure the internal sealing of the tank body 10 and meet the sealing requirements of vacuum oil extraction. At the same time, the sealing plug 110 is connected to the upper end of the pipe fitting 20 to achieve a stable assembly between the pipe fitting 20 and the tank body 10. Its vertically penetrating channel can also allow the upper end of the connecting rod 40 to pass through, providing guidance for the vertical movement and rotation of the connecting rod 40 and ensuring that the connecting rod 40 drives the sealing piston 30 to move precisely.

[0049] See Figure 3 The upper end of the connecting rod 40 is provided with a limiting plate 410, and the elastic element 60 is a spring and is sleeved on the connecting rod 40 between the limiting plate 410 and the sealing plug 110.

[0050] In this invention, the first limiting groove and the second limiting groove can be configured with different shapes according to their own limiting requirements, so as to constrain the operating rod to remain inside them and prevent it from disengaging without external force. For example, the first limiting groove 520 extends upward from the end near the inclined groove 510 toward the end away from the inclined groove 510.

[0051] In the first embodiment of this utility model, the sealing boss 200 is disposed on the inner wall of the pipe fitting 20, and the sealing piston 30 is disposed inside the pipe fitting 20 and moves up and down.

[0052] In this utility model, a second opening 120 is provided on the lower surface of the tank body 10, and the pipe 20 extends into the second opening 120.

[0053] In the second embodiment of the sealing boss 200 of this utility model, the second opening 120 is connected to a connector 70, and the interior of the connector 70 is in communication with the interior of the pipe fitting 20; the sealing boss 200 is disposed inside the connector 70; and the sealing piston 30 is disposed inside the connector 70 and moves up and down.

[0054] In this invention, the surface of the operating lever 400 is provided with a soft layer.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pumping unit structure, characterized in that: It includes a tank body (10), pipe fittings (20), sealing piston (30), connecting rod (40), and limiting sleeve (50); The pipe fitting (20) is fixedly connected to the tank body (10); the lower end of the pipe fitting (20) is open; the pipe fitting (20) is provided with a communication port (210) that communicates with the inside of the tank body (10); a sealing boss (200) is provided below the communication port (210), and the sealing piston (30) is moved up and down and is located below the sealing boss (200); The connecting rod (40) moves up and down and is rotatably disposed inside the pipe fitting (20). The lower end of the connecting rod (40) is fixedly connected to the sealing piston (30). The upper end of the connecting rod (40) passes through the pipe fitting (20) and extends upwards to be disposed inside the limiting sleeve (50). An operating rod (400) is connected to the upper end of the connecting rod (40). The limiting sleeve (50) is provided with an inclined groove (510), the lower end of the inclined groove (510) is connected to a first limiting groove (520), and the upper end of the inclined groove (510) is connected to a second limiting groove (530); the operating rod (400) extends through the inclined groove (510) to the outside of the limiting sleeve (50); the operating rod (400) is movable to the first limiting groove (520) or the second limiting groove (530); When the operating lever (400) is located in the first limiting groove (520), the sealing piston (30) and the sealing boss (200) are separated from each other; When the operating lever (400) is located in the second limiting groove (530), the sealing piston (30) and the sealing boss (200) are in contact with each other.

2. The oil pumping unit structure according to claim 1, characterized in that: It also includes an elastic element (60) for exerting an upward force on the connecting rod (40).

3. The oil pumping unit structure according to claim 2, characterized in that: The elastic element (60) is disposed inside the limiting sleeve (50).

4. The oil pumping unit structure according to claim 2 or 3, characterized in that: The upper surface of the tank (10) is provided with a first opening (100), and a sealing plug (110) is provided in the first opening (100). The upper end of the pipe (20) is connected to the sealing plug (110). The sealing plug (110) is provided with a channel that runs vertically through it, and the upper end of the connecting rod (40) extends upward through the channel.

5. The oil pumping unit structure according to claim 4, characterized in that: The upper end of the connecting rod (40) is provided with a limiting plate (410), and the elastic element (60) is a spring and is sleeved on the connecting rod (40) between the limiting plate (410) and the sealing plug (110).

6. The oil pumping unit structure according to claim 1, characterized in that: The sealing boss (200) is disposed on the inner wall of the pipe fitting (20), and the sealing piston (30) is disposed inside the pipe fitting (20) and moves up and down.

7. The oil pumping unit structure according to claim 1, characterized in that: The lower surface of the tank (10) is provided with a second opening (120), and the pipe (20) extends into the second opening (120).

8. The oil pumping unit structure according to claim 7, characterized in that: The second opening (120) is connected to a connector (70), the interior of which communicates with the interior of the pipe fitting (20); The sealing boss (200) is disposed inside the joint (70); the sealing piston (30) is disposed inside the joint (70) and moves up and down.

9. The oil pumping unit structure according to claim 1, characterized in that: The first limiting groove (520) extends upward from the end near the inclined groove (510) toward the end away from the inclined groove (510).

10. The oil pumping unit structure according to claim 1, characterized in that: The operating lever (400) has a soft layer on its surface.

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