A hydraulic oil changing device for forklifts

Abstract

This utility model discloses a hydraulic oil changing device for forklifts, belonging to the technical field of forklift maintenance equipment. The device includes a scaffold with a chassis and wheels at its base. A scissor lift platform is mounted on the chassis, driven by a handle, bolts, and nuts, allowing adjustment of the platform's height for precise alignment with the oil tank openings of different forklifts. A hand-cranked pump, a fine-tuning valve, and a magnetic filter are integrated on the platform. The hand-cranked pump draws hydraulic oil, its outlet connected to the fine-tuning valve to control the flow rate. The oil then enters the magnetic filter, where a magnetic rod and filter screen perform dual filtration. This utility model integrates movement, lifting, oil drawing, and filtration functions, solving the problems of existing oil changing equipment's difficulty in precisely aligning with the oil tank opening and its labor-intensive operation. It features a compact structure, adaptability to different forklift models, and significantly reduced labor intensity.

Description

Technical Field

[0001] This utility model relates to the technical field of forklift maintenance equipment, and in particular to a hydraulic oil replacement device for forklifts. Background Technology

[0002] Forklifts are indispensable material handling equipment in modern logistics warehousing and manufacturing. Their hydraulic systems are crucial for achieving core functions such as lifting and tilting goods. To ensure the stable operation of the hydraulic system and extend its service life, regularly changing the hydraulic oil is a vital maintenance task.

[0003] In current forklift maintenance practices, hydraulic oil changes typically rely on a rather rudimentary and fragmented set of tools. Operators need to move equipment such as the oil pump and waste oil collection bin to the forklift. However, the height of the hydraulic oil tank's fill and drain ports from the ground varies significantly between different brands and models of forklifts, which presents a direct challenge to the operation.

[0004] To align the pumping equipment with the oil tank opening, operators often have to adopt inconvenient postures such as bending over or squatting, or temporarily find blocks or supports to adjust the equipment height. This method not only makes the alignment process time-consuming and laborious, but also makes it difficult to ensure the stable placement of the equipment, which is prone to shaking during pumping, causing oil spills and contaminating the working environment. The entire process is not only labor-intensive and inefficient, but also lacks professionalism and safety.

[0005] Therefore, this utility model proposes a hydraulic oil replacement device for forklifts to overcome the shortcomings of the prior art. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a hydraulic oil changing device for forklifts, aiming to improve the problem in the existing technology where it is difficult to accurately and effortlessly align the hydraulic oil changing device with the forklift oil tank openings at different heights, resulting in high overall labor intensity and low work efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic oil replacement device for forklifts, comprising: scaffolding and a hand-cranked pump mounted on the scaffolding; the bottom of the scaffolding is provided with a chassis and wheels fixed to the chassis; the scaffolding also includes a scissor lift platform mounted on the chassis and a platform supported by the scissor lift platform; the hand-cranked pump is mounted on the platform; the scaffolding is also provided with a handle, bolts, and nuts for driving the scissor lift platform to rise and fall.

[0008] The handle is fixedly connected to the bolt to drive its rotation. The bolt and nut are threaded together, and the nut is connected to the scissor lift platform. Through this integrated structure that combines the mobile chassis, scissor lift platform and oil extraction device, the entire oil extraction device can be moved conveniently and its vertical height can be precisely adjusted.

[0009] Preferably, the hand-cranked pump includes a piston, a hand crank fixedly connected to the piston, and a one-way valve.

[0010] Preferably, the device further includes a magnetic filter and a fine-tuning valve, and the oil outlet of the hand-cranked pump is connected in sequence to the oil inlet of the magnetic filter through the fine-tuning valve.

[0011] Preferably, the magnetic filter is provided with a magnetic rod for adsorbing magnetic impurities and a filter screen for intercepting non-magnetic impurities.

[0012] Preferably, the magnetic filter is connected to an external pipe via a flange thread.

[0013] Preferably, the fine-tuning valve includes a valve body, a valve core and a valve stem disposed within the valve body, and a button connected to the valve stem. The button is used to drive the valve stem to move so as to change the flow area of ​​the valve core.

[0014] Preferably, the fine-tuning valve further includes a pneumatic actuator and a valve cover, the valve cover covering the valve body and connecting the pneumatic actuator to the valve body.

[0015] Preferably, the device further includes a transparent tube, one end of which is connected to the oil inlet of the hand pump, and the other end is used to extend into the forklift's oil tank.

[0016] Preferably, the platform is equipped with an oil drum, which is placed on the platform to collect the extracted hydraulic oil.

[0017] This utility model has the following beneficial effects: 1. In this utility model, by combining a scissor lift platform with a mobile scaffold with wheels, and using a handle to drive a screw mechanism to control the lifting of the platform, the problem of existing forklift oil changing equipment being difficult to quickly and effortlessly align with oil tank openings at different heights, and being laborious and inefficient, is solved. This achieves the technical effects of rapid positioning, smooth lifting, and significantly reduced manual labor intensity.

[0018] 2. In this utility model, by setting a magnetic filter integrating a magnetic rod and a filter screen in the oil extraction pipeline, the problem that impurities such as metal shavings mixed in the extracted waste hydraulic oil cannot be effectively removed is solved, achieving the technical effect of double filtration and purification of the extracted oil, which facilitates subsequent analysis of forklift wear and ensures the cleanliness of waste oil collection. Attached Figure Description

[0019] Figure 1 This is a perspective view of a hydraulic oil changing device for a forklift proposed in this utility model; Figure 2 This is a schematic diagram of a scaffold for a hydraulic oil changing device for a forklift, as proposed in this utility model. Figure 3 This is a schematic diagram of a hand-cranked pump for a forklift hydraulic oil changing device proposed in this utility model; Figure 4 This is a schematic diagram of a fine-tuning valve for a hydraulic oil changing device for a forklift, as proposed in this utility model. Figure 5 This is a schematic diagram of a magnetic filter for a hydraulic oil changing device for forklifts, as proposed in this utility model.

[0020] Legend: 1. Scaffolding; 2. Oil drum; 3. Hand pump; 4. Adjusting valve; 5. Magnetic filter; 6. Wheel; 7. Transparent tube; 101. Chassis; 102. Scissor lift; 103. Platform; 104. Bolt; 105. Handle; 106. Nut; 301. Piston; 302. Hand crank; 303. Check valve; 401. Valve body; 402. Pneumatic actuator; 403. Button; 404. Valve cover; 405. Valve stem; 406. Valve core; 501. Filter screen; 502. Flange thread; 503. Magnetic rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-5 This utility model provides an embodiment of a hydraulic oil changing device for forklifts, which aims to solve the problem that the oil pumping device is difficult to accurately align with the oil tank openings of forklifts at different heights and the overall operation is labor-intensive in the existing hydraulic oil changing methods for forklifts.

[0023] The hydraulic oil replacement device for the forklift includes a scaffold 1 and a hand-cranked pump 3 mounted on the scaffold 1. The scaffold 1 serves as a platform for moving and lifting the entire device, while the hand-cranked pump 3 is used to extract hydraulic oil from the forklift. Specifically, the bottom of the scaffold 1 is equipped with a chassis 101, and multiple wheels 6 are fixedly connected to the bottom of the chassis 101 to facilitate easy movement of the device. A scissor lift platform 102 is mounted on the chassis 101, and a platform 103 is supported at the top of the scissor lift platform 102. The hand-cranked pump 3 is installed on the platform 103. To drive the scissor lift... The lifting platform 102 is raised and lowered. The scaffolding 1 is also equipped with a handle 105, a bolt 104 and a nut 106. The handle 105 is fixedly connected to one end of the bolt 104 to drive its rotation. The bolt 104 and the nut 106 are threadedly engaged. The nut 106 is connected to the central linkage structure of the scissor lift platform 102. By rotating the handle 105, the bolt 104 is driven to rotate, which in turn causes the nut 106 to produce linear displacement along the axial direction of the bolt 104, thereby pushing the cross members of the scissor lift platform 102 to unfold or retract, ultimately realizing the smooth rise and fall of the platform 103. To achieve filtration and flow control of the extracted hydraulic oil, the hydraulic oil replacement device for forklifts also includes a magnetic filter 5 and a fine-tuning valve 4. The oil outlet of the hand pump 3 is connected to the oil inlet of the magnetic filter 5 in sequence through the fine-tuning valve 4, thus forming a complete oil extraction and purification circuit.

[0024] The magnetic filter 5 is connected to an external pipeline via a flange thread 502. Oil enters the filter from the inlet at the flange thread 502. The internal cavity of the magnetic filter 5 contains a magnetic rod 503 and a filter screen 501. The magnetic rod 503 is used to adsorb magnetic impurities such as iron filings mixed in the oil through a strong magnetic field, while the filter screen 501 is used to physically intercept non-magnetic particulate impurities suspended in the oil. When the oil flows through the magnetic filter 5, it undergoes two stages of filtration, namely the magnetic rod 503 and the filter screen 501, thereby achieving purification. At the same time, a fine-tuning valve 4 is connected between the hand pump 3 and the magnetic filter 5 to precisely control the flow rate of the oil.

[0025] The fine-tuning valve 4 includes a valve body 401, a valve cover 404, and a valve core 406 and a valve stem 405 disposed inside the valve body 401. The valve cover 404 covers the valve body 401, serving to seal and protect the internal components. The upper end of the valve stem 405 is connected to the button 403, and the lower end is fixedly connected to the valve core 406. By pressing the button 403, the valve stem 405 and the valve core 406 can be driven to move up and down inside the valve body 401. The movement of the valve core 406 changes the flow area between it and the internal flow channel of the valve body 401, thereby achieving fine adjustment of the liquid flow rate and ensuring the intuitiveness and accuracy of flow control.

[0026] To provide a power source and achieve unidirectional oil extraction, the hand-cranked pump 3 includes a piston 301, a hand crank 302, and a one-way valve 303. One end of the hand crank 302 is fixedly connected to the piston 301, while the other end is held and cranked by the operator. The piston 301 slides back and forth within the pump body, generating a pressure difference by changing the internal volume of the pump body. The one-way valve 303 is located in the oil passage of the pump body and can automatically open or close according to changes in the pressure difference, ensuring that liquid can only be drawn into the pump from the oil tank and flow out from the pump outlet without backflow.

[0027] To achieve automated control of the valve opening and closing degree, the fine-tuning valve 4 also includes a pneumatic actuator 402; the pneumatic actuator 402 is connected to the valve body 401 through the valve cover 404. The pneumatic actuator 402 uses compressed air as a power source and can drive the valve stem 405 and valve core 406 to move, thereby replacing the operation of manually pressing the button 403 and realizing remote or automated control of the valve opening degree.

[0028] To facilitate observation of the liquid flow and connection of pipelines, the device also includes a transparent tube 7 and an oil drum 2; one end of the transparent tube 7 is connected to the oil inlet of the hand pump 3, and the other end is used to extend into the forklift oil tank. Due to its transparent nature, the operator can see directly whether the hydraulic oil is being successfully drawn out; the oil drum 2 is placed on the platform 103 to collect the filtered waste hydraulic oil flowing out from the outlet of the magnetic filter 5.

[0029] Working principle: First, push the entire device to the vicinity of the forklift's fuel tank using wheels 6. Observe the height of the forklift's fuel tank opening and turn the handle 105. The handle 105 drives the bolt 104 to rotate. Through the thread transmission between the bolt 104 and the nut 106, the scissor lift platform 102 is driven to rise or fall until the platform 103 is at the same level as the forklift's fuel tank opening. This process solves the problem of aligning the device with fuel tank openings of different heights.

[0030] Subsequently, one end of the transparent tube 7 is connected to the oil inlet of the hand pump 3, and the other end is placed into the forklift oil tank. The hand crank 302 is then cranked. The hand crank 302 drives the piston 301 to move repeatedly in the pump chamber, generating negative pressure to draw the hydraulic oil in the oil tank into the pump body. Under the action of the one-way valve 303, the oil is pushed out in one direction.

[0031] The extracted hydraulic oil then flows into the fine-tuning valve 4. The operator can control the opening degree of the valve core 406 by pressing the button 403 or starting the pneumatic actuator 402, thereby precisely adjusting the flow rate and total amount of oil extracted. After the hydraulic oil is adjusted, it enters the magnetic filter 5. Magnetic impurities in the oil are attracted by the magnetic rod 503, while non-magnetic impurities are intercepted by the filter screen 501. The purified liquid finally flows into the oil tank 2 placed on the platform 103 through the oil outlet, completing the extraction and filtration of old oil.

Claims

1. A hydraulic oil changing device for forklifts, comprising: The scaffolding (1) and the hand-cranked pump (3) mounted on the scaffolding (1) are characterized in that the bottom of the scaffolding (1) is provided with a chassis (101) and wheels (6) fixed to the chassis (101); the scaffolding (1) further includes a scissor lift platform (102) mounted on the chassis (101) and a platform (103) supported by the scissor lift platform (102); the hand-cranked pump (3) is mounted on the platform (103); the scaffolding (1) is also provided with a handle (105), a bolt (104) and a nut (106) for driving the scissor lift platform (102) to rise and fall, the handle (105) is fixedly connected to the bolt (104) to drive it to rotate, the bolt (104) is threadedly engaged with the nut (106), and the nut (106) is operatively connected to the scissor lift platform (102) to make it rise and fall.

2. The hydraulic oil changing device for forklifts according to claim 1, characterized in that, The hand pump (3) includes a piston (301), a hand crank (302) fixedly connected to the piston (301), and a one-way valve (303).

3. The hydraulic oil changing device for forklifts according to claim 1, characterized in that, The device also includes a magnetic filter (5) and a fine-tuning valve (4), and the oil outlet of the hand pump (3) is connected to the oil inlet of the magnetic filter (5) in sequence through the fine-tuning valve (4).

4. The hydraulic oil changing device for forklifts according to claim 3, characterized in that, The magnetic filter (5) is provided with a magnetic rod (503) for adsorbing magnetic impurities and a filter screen (501) for intercepting non-magnetic impurities.

5. The hydraulic oil changing device for forklifts according to claim 3, characterized in that, The magnetic filter (5) is connected to an external pipe via a flange thread (502).

6. The hydraulic oil changing device for forklifts according to claim 3, characterized in that, The fine-tuning valve (4) includes a valve body (401), a valve core (406) and a valve stem (405) disposed in the valve body (401), and a button (403) connected to the valve stem (405). The button (403) is used to drive the valve stem (405) to move so as to drive the valve core (406) to change the flow area.

7. The hydraulic oil changing device for forklifts according to claim 6, characterized in that, The fine-tuning valve (4) also includes a pneumatic actuator (402) and a valve cover (404), the valve cover (404) covering the valve body (401) and connecting the pneumatic actuator (402) to the valve body (401).

8. The hydraulic oil changing device for forklifts according to claim 3, characterized in that, It also includes a transparent tube (7), one end of which is connected to the oil inlet of the hand pump (3), and the other end is used to extend into the forklift oil tank.

9. The hydraulic oil changing device for forklifts according to claim 1, characterized in that, The platform (103) is provided with an oil drum (2), which is placed on the platform (103) to collect the extracted hydraulic oil.

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