Forklift hydraulic circuit system with radiator effect
By designing the outer wall of the return oil tank assembly as the outer wall structure of the vehicle frame, and utilizing air contact for rapid heat dissipation, the thermal management problem of the forklift hydraulic circuit system under high performance or special working conditions is solved, achieving efficient heat dissipation without increasing complexity and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI HELI CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-14
Smart Images
Figure CN224493664U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydraulic circuit technology, and specifically to a forklift hydraulic circuit system with a radiator effect. Background Technology
[0002] Generally, the basic hydraulic circuit system of a forklift mainly includes a hydraulic oil tank, gear oil pump, multi-way control valve, connecting pipelines, etc. These basic components are all located inside the forklift body and have no heat dissipation device.
[0003] However, under certain high-performance and special working conditions (such as high workload and high ambient temperature), this hydraulic circuit system cannot achieve thermal equilibrium, which will cause the oil temperature to rise continuously. If the vehicle is designed with a high temperature alarm function, it will limit the normal use of the vehicle or shut it down directly to protect the equipment. If the vehicle does not have a high temperature alarm function, the continuous rise in temperature will lead to a reduction in the life of hydraulic components or even direct damage, resulting in safety risks.
[0004] For high-performance forklifts or forklifts operating under special conditions, the above-mentioned problem of high oil circuit temperature is usually solved by adding a forced cooling device, such as an "oil radiator," to the oil circuit system. Adding an oil radiator brings disadvantages such as system complexity, increased potential failure points, and increased costs.
[0005] Therefore, a forklift hydraulic circuit system with radiator effect is needed. Utility Model Content
[0006] The purpose of this utility model embodiment is to provide a forklift hydraulic circuit system with a radiator effect. This forklift hydraulic circuit system can directly contact the outside air through a large-area outer wall, quickly remove heat from the oil circuit, thereby reducing the oil temperature. It has the effect of cooling the oil circuit without adding an additional radiator.
[0007] To achieve the above objectives, this utility model provides a forklift hydraulic circuit system with a radiator effect, the forklift hydraulic circuit system comprising:
[0008] A hydraulic oil tank assembly, wherein the hydraulic oil tank assembly is provided with an oil suction steel pipe for connecting to one end of an oil suction hose to draw oil from the hydraulic oil tank assembly;
[0009] An oil pump, wherein the oil pump's suction port is connected to the other end of the oil suction hose, and the oil pump's outlet is connected to one end of the high-pressure oil pipeline.
[0010] A multi-way valve, the inlet of which is connected to the other end of the high-pressure oil pipeline, to receive oil and deliver it to the required location;
[0011] A front-end return oil pipe, one end of which is connected to the return oil port of the multi-way valve;
[0012] The oil return tank assembly is mounted on the vehicle frame, and the outer wall of the oil return tank assembly serves as an outer wall structural feature of the vehicle frame, directly contacting the external air of the vehicle frame to increase heat dissipation efficiency. The oil inlet pipe of the oil return tank assembly is connected to the other end of the front oil return pipe.
[0013] The rear return oil hose has one end connected to the oil outlet pipe of the return oil tank assembly and the other end connected to the hydraulic oil tank assembly.
[0014] Optionally, the oil return tank assembly includes: a rear end plate, an outer wall plate, a surrounding plate, and a front end plate. The rear end plate, outer wall plate, surrounding plate, and front end plate together form a thin-walled oil tank body. The outer wall plate serves as an outer wall structural feature of the vehicle frame. The area of the outer wall plate is larger than the side area of the thin-walled oil tank body to increase the heat dissipation rate of the oil temperature inside the thin-walled oil tank body. The surrounding plate is opposite to the outer wall plate. Circular holes are provided at the front end and rear end of the surrounding plate. Oil inlet pipes and oil outlet pipes are welded to the circular holes, respectively.
[0015] Optionally, the upper and lower parts of the rear end plate have through holes, and screw plug seats are welded at the through holes, with an upper vent plug and a lower oil drain plug installed respectively.
[0016] Optionally, the forklift hydraulic circuit system includes a counterweight mounted on the frame, and the hydraulic tank assembly is horizontally positioned in the recess of the counterweight.
[0017] Optionally, the hydraulic tank assembly includes:
[0018] The oil tank is horizontally mounted on the counterweight and is L-shaped. An oil suction pipe is welded to the first top surface of the oil tank, and an oil return pipe is welded to the second top surface of the oil tank. The oil return pipe is connected to the other end of the rear oil return hose. The height of the first top surface is less than the height of the second top surface.
[0019] A refueling steel pipe is disposed on the second top surface, and the refueling steel pipe has external threads. The refueling cap is screwed onto the refueling steel pipe through the external threads.
[0020] Optionally, the tank body has a cleaning hole on the side away from the second top surface, and a cleaning hole cover plate is fixed to the cleaning hole by threads.
[0021] Optionally, a motor mounting plate is provided on the first top surface.
[0022] Optionally, the oil tank body is provided with protruding plates on both sides, and the protruding plates are provided with through holes. Fixing bolts pass through the through holes to fix the oil tank body to the counterweight.
[0023] Optionally, a fixing plate is welded to the top of the outer wall panel for fixing the thin-walled fuel tank body to the vehicle frame.
[0024] Optionally, a lifting ring is provided on the first top surface.
[0025] Through the above technical solution, the forklift hydraulic circuit system with radiator effect provided by this utility model includes a hydraulic oil tank assembly. This assembly can be equipped with a suction steel pipe for connecting to one end of a suction hose to draw oil from the hydraulic oil tank assembly. The oil pump's suction port can be connected to the other end of the suction hose, and the oil pump's outlet can be connected to one end of a high-pressure oil supply pipe, thereby pumping oil from the hydraulic oil tank assembly and outputting it through the high-pressure oil supply pipe. The inlet of the multi-way valve can be connected to the other end of the high-pressure oil supply pipe, thereby receiving the oil pumped out by the oil pump and delivering it to the required parts. One end of the front return oil pipe can be connected to the return port of the multi-way valve, thereby receiving the oil flowing back from the multi-way valve. The return oil tank assembly can be mounted on the chassis frame, and its outer wall can serve as a structural feature of the chassis frame, forming an integral part of the frame structure. Without affecting the forklift's appearance, the outer wall of the return oil tank assembly can directly contact the outside air, thereby increasing heat dissipation efficiency, quickly removing heat from the oil circuit, and lowering the oil temperature. The inlet pipe of the return oil tank assembly can be connected to the other end of the front return oil pipe to receive oil flowing back from it. One end of the rear return oil hose can be connected to the outlet pipe of the return oil tank assembly, and the other end can be connected to the hydraulic oil tank assembly, allowing cooled oil to be returned to the hydraulic oil tank assembly. This forklift hydraulic circuit system, through its large outer wall directly contacting the outside air, quickly removes heat from the oil circuit, thereby lowering the oil temperature and achieving heat dissipation for the oil circuit without adding an additional radiator.
[0026] Other features and advantages of this utility model embodiment will be described in detail in the following detailed description section. Attached Figure Description
[0027] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0028] Figure 1 This is a system diagram of a forklift hydraulic circuit system with a radiator effect according to one embodiment of the present invention;
[0029] Figure 2This is a diagram of the return oil tank assembly of a forklift hydraulic oil circuit system with radiator effect according to one embodiment of the present invention.
[0030] Figure 3 This is a hydraulic oil tank assembly diagram of a forklift hydraulic circuit system with radiator effect according to one embodiment of the present invention.
[0031] Explanation of reference numerals in the attached figures
[0032] Detailed Implementation
[0033] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.
[0034] Figure 1 This is a system diagram of a forklift hydraulic circuit system with a radiator effect according to one embodiment of the present invention. In this invention, the forklift hydraulic circuit system may include: a hydraulic oil tank assembly 1, an oil pump 4, a multi-way valve 6, a front return oil pipe 7, a return oil pipe assembly 8, and a rear return oil hose 10. The hydraulic oil tank assembly 1 may be equipped with a suction steel pipe 2. The suction steel pipe 2 can be connected to one end of the suction hose 3, thereby drawing oil from the hydraulic oil tank assembly 1. The suction port of the oil pump 4 can be connected to the other end of the suction hose 3, and the outlet of the oil pump 4 can be connected to one end of the high-pressure oil supply pipe 5, thereby pumping oil out of the hydraulic oil tank assembly 1. The inlet of the multi-way valve 6 can be connected to the other end of the high-pressure oil supply pipe 5, thereby receiving the oil pumped out by the oil pump 4 and delivering the oil to the required parts. One end of the front return oil pipe 7 can be connected to the return port of the multi-way valve 6, thereby receiving the oil flowing back from the multi-way valve 6. The return oil tank assembly 8 can be mounted on the vehicle frame, and the outer wall of the return oil tank assembly 8 can serve as an outer wall structural feature of the vehicle frame, directly contacting the external air of the vehicle frame, thereby increasing the heat dissipation efficiency of the oil in the return oil tank assembly 1. The inlet oil pipe 9 of the return oil tank assembly 8 can be connected to the other end of the front return oil pipe 7, thereby receiving the oil flowing back from the multi-way valve 6 and dissipating the oil temperature within the return oil tank assembly 8. One end of the rear return oil hose 10 can be connected to the outlet oil pipe 11 of the return oil tank assembly 8, and the other end can be connected to the hydraulic oil tank assembly 1, thereby transporting the cooled oil back into the hydraulic oil tank assembly 1. The forklift's hydraulic circuit system can directly contact the outside air through a large outer wall, quickly removing heat from the oil circuit and thus reducing the oil temperature. It achieves the effect of cooling the oil circuit without adding an additional radiator.
[0035] In one embodiment of this utility model, such as Figure 2 As shown, the oil return tank assembly 8 may include: a rear end plate 801, an outer wall plate 802, a surrounding plate 803, and a front end plate 804. The rear end plate 801, outer wall plate 802, surrounding plate 803, and front end plate 804 can be combined to form a thin-walled oil tank body. Oil returning from the multi-way valve 6 can enter this thin-walled oil tank body and then be cooled within it. The outer wall plate 802 can serve as an external structural feature of the frame. The outer wall plate 802 can also function as part of the frame structure, much like a "panel" in a traditional frame, with an external appearance function. The area of the outer wall plate 802 can be larger than the side area of the thin-walled oil tank body, thereby increasing the contact area with the air outside the frame and thus increasing the oil temperature dissipation rate within the thin-walled oil tank body. The surrounding plate 803 can be opposite the outer wall plate 802. The front and rear ends of the enclosure 803 can be provided with round holes, and oil inlet pipe 9 and oil outlet pipe 11 can be welded into the round holes respectively.
[0036] In one embodiment of this utility model, such as Figure 2 As shown, the upper and lower parts of the rear end plate 801 can each have through holes. A screw plug seat can be welded into the through hole, and an upper vent plug 805 and a lower drain plug 806 can be installed on the screw plug seat, thereby facilitating the venting and draining of the thin-walled oil tank.
[0037] In one embodiment of this utility model, such as Figure 1 As shown, the forklift hydraulic circuit system may include a counterweight 12. This counterweight may be mounted on the frame to increase balance. The hydraulic tank assembly 1 may be horizontally positioned within the recess of the counterweight 12.
[0038] In one embodiment of this utility model, such as Figure 3 As shown, the hydraulic oil tank assembly 1 may include: an oil tank body 101 and a refueling steel pipe 106. The oil tank body 101 may be horizontally mounted on the counterweight 12, and the oil tank body 101 may be L-shaped. A suction steel pipe 103 may be welded to the first top surface 102 of the oil tank body 101, and a return steel pipe 105 may be welded to the second top surface 104 of the oil tank body 101. The return steel pipe 105 may be connected to the other end of the rear return hose 10. The height of the first top surface 102 may be less than the height of the second top surface 104. The refueling steel pipe 106 may be mounted on the second top surface 104, and the refueling steel pipe 106 may have external threads. The refueling cap 107 can be screwed onto the refueling steel pipe 106 through the external threads. When it is necessary to refuel the oil tank body 101, refueling can be performed through the refueling steel pipe 106.
[0039] In one embodiment of this utility model, such as Figure 3As shown, a cleaning hole may be provided on the side of the oil tank body 101 away from the second top surface 104, and a cleaning cover plate 108 may be fixed to the cleaning hole by threads. The design of this cleaning hole facilitates the cleaning and internal inspection of the oil tank body 101, and the cleaning hole cover plate 108 can seal the cleaning hole.
[0040] In one embodiment of this utility model, such as Figure 3 As shown, a motor mounting plate 13 may be provided on the first top surface 102. The motor mounting plate 13 may be a rectangular flange structure, a thick plate, and may have threaded holes distributed on it for fixing the motor.
[0041] In one embodiment of this utility model, such as Figure 3 As shown, protruding plates can be provided on both sides of the fuel tank 101, and through holes can be provided on the protruding plates. The fixing bolt 109 can pass through the through holes to fix the fuel tank 101 to the counterweight 12. Since a motor needs to be installed on the fuel tank 101, and the motor vibrates when it is working, a fixing frame can also be provided in the front inside of the fuel tank 101. It can be fixed to the rear plate 101 of the vehicle frame by bolts, thereby strengthening and fixing the fuel tank 101 and reducing the impact of motor vibration on the structure of the fuel tank 101.
[0042] In one embodiment of this utility model, such as Figure 2 As shown, a mounting plate 807 can be welded to the top of the outer wall panel 802. The mounting plate 807 can be used to fix the thin-walled fuel tank body to the frame, and also serves as part of the frame structure, much like the wall panel in a traditional frame, with the outer side having an aesthetic function.
[0043] In one embodiment of this utility model, such as Figure 3 As shown, a lifting ring 14 may be provided on the first top surface 102. There may be two or more lifting rings 14, which are used for lifting the oil tank body 101. They may be arranged in a staggered manner to keep the oil tank body 101 horizontal after lifting.
[0044] Through the above technical solution, the forklift hydraulic circuit system with radiator effect provided by this utility model includes a hydraulic oil tank assembly. This assembly can be equipped with a suction steel pipe for connecting to one end of a suction hose to draw oil from the hydraulic oil tank assembly. The oil pump's suction port can be connected to the other end of the suction hose, and the oil pump's outlet can be connected to one end of a high-pressure oil supply pipe, thereby pumping oil from the hydraulic oil tank assembly and outputting it through the high-pressure oil supply pipe. The inlet of the multi-way valve can be connected to the other end of the high-pressure oil supply pipe, thereby receiving the oil pumped out by the oil pump and delivering it to the required parts. One end of the front return oil pipe can be connected to the return port of the multi-way valve, thereby receiving the oil returning from the multi-way valve. The return oil tank assembly can be mounted on the chassis frame, and its outer wall can serve as a structural feature of the chassis frame, forming an integral part of the frame structure. Without affecting the forklift's appearance, the outer wall of the return oil tank assembly can directly contact the outside air, thereby increasing heat dissipation efficiency, quickly removing heat from the oil circuit, and lowering the oil temperature. The inlet pipe of the return oil tank assembly can be connected to the other end of the front return oil pipe to receive oil flowing back from it. One end of the rear return oil hose can be connected to the outlet pipe of the return oil tank assembly, and the other end can be connected to the hydraulic oil tank assembly, allowing cooled oil to be returned to the hydraulic oil tank assembly. This forklift hydraulic circuit system, through its large outer wall directly contacting the outside air, quickly removes heat from the oil circuit, thereby lowering the oil temperature and achieving heat dissipation for the oil circuit without adding an additional radiator.
[0045] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0046] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A forklift hydraulic circuit system with radiator effect, characterized in that, The forklift hydraulic circuit system includes: The hydraulic oil tank assembly (1) is provided with an oil suction steel pipe (2) for connecting to one end of an oil suction hose (3) to draw oil from the hydraulic oil tank assembly (1); Oil pump (4), the oil suction port of the oil pump (4) is connected to the other end of the oil suction hose (3), and the oil outlet of the oil pump (4) is connected to one end of the high pressure oil pipeline (5); A multi-way valve (6) is connected to the other end of the high-pressure oil pipeline (5) to receive oil and deliver it to the required location. Front-end return oil pipe (7), one end of which is connected to the return oil port of the multi-way valve (6); The oil return tank assembly (8) is mounted on the frame, and the outer wall of the oil return tank assembly (8) serves as an outer wall structure feature of the frame, directly contacting the external air of the frame to increase heat dissipation efficiency. The oil inlet pipe (9) of the oil return tank assembly (8) is connected to the other end of the front oil return pipe (7). The rear return oil hose (10) is connected at one end to the oil outlet pipe (11) of the return oil tank assembly (8) and at the other end to the hydraulic oil tank assembly (1).
2. The forklift hydraulic circuit system according to claim 1, characterized in that, The oil return tank assembly (8) includes: a rear end plate (801), an outer wall plate (802), a surrounding plate (803), and a front end plate (804). The rear end plate (801), the outer wall plate (802), the surrounding plate (803), and the front end plate (804) together form a thin-walled oil tank body. The outer wall plate (802) serves as the outer wall structure feature of the vehicle frame. The area of the outer wall plate (802) is larger than the side area of the thin-walled oil tank body to increase the heat dissipation rate of the oil temperature in the thin-walled oil tank body. The surrounding plate (803) is opposite to the outer wall plate (802). Circular holes are provided at the front end and rear end of the surrounding plate (803). Oil inlet pipe (9) and oil outlet pipe (11) are welded to the circular holes respectively.
3. The forklift hydraulic circuit system according to claim 2, characterized in that, The upper and lower parts of the rear end plate (801) have through holes, and screw plug seats are welded at the through holes, and upper exhaust plug (805) and lower oil drain plug (806) are installed respectively.
4. The forklift hydraulic circuit system according to claim 1, characterized in that, The forklift hydraulic circuit system includes a counterweight (12) mounted on the frame, and the hydraulic tank assembly (1) is horizontally mounted in the recess of the counterweight (12).
5. The forklift hydraulic circuit system according to claim 4, characterized in that, The hydraulic oil tank assembly (1) includes: The oil tank (101) is horizontally set on the counterweight (12) and is L-shaped. The first top surface (102) of the oil tank (101) is welded with an oil suction pipe (103), and the second top surface (104) of the oil tank (101) is welded with an oil return pipe (105). The oil return pipe (105) is connected to the other end of the rear oil return hose (10). The height of the first top surface (102) is less than the height of the second top surface (104). A refueling steel pipe (106) is disposed on the second top surface (104), and the refueling steel pipe (106) has an external thread. The refueling cap (107) is screwed onto the refueling steel pipe (106) through the external thread.
6. The forklift hydraulic circuit system according to claim 5, characterized in that, The oil tank body (101) has a cleaning hole on the side away from the second top surface (104), and a cleaning hole cover plate (108) is fixed to the cleaning hole by threads.
7. The forklift hydraulic circuit system according to claim 5, characterized in that, A motor mounting plate (13) is provided on the first top surface (102).
8. The forklift hydraulic circuit system according to claim 5, characterized in that, The oil tank body (101) has protruding plates on both sides, and through holes are provided on the protruding plates. Fixing bolts (109) pass through the through holes to fix the oil tank body (101) onto the counterweight (12).
9. The forklift hydraulic circuit system according to claim 2, characterized in that, A fixing plate (807) is welded to the top of the outer wall panel (802) for fixing the thin-walled oil tank body to the vehicle frame.
10. The forklift hydraulic circuit system according to claim 5, characterized in that, A lifting ring (14) is provided on the first top surface (102).