Pressure regulation control method and system for tailboard

Abstract

The invention discloses a pressure regulation control method and system for a tail plate. The method is executed by a pressure regulator and comprises the steps that the pressure of a lifting oil way and the pressure of a turning plate oil way are monitored in real time; when the pressure difference of the two paths exceeds a preset threshold value, the adjustable pressure difference valve is controlled to be opened, and hydraulic oil flows from the high-pressure side to the low-pressure side to achieve balance; and when the pressure difference recovers below the threshold value, the valve is closed. The invention further discloses a tailboard system, and a pressure regulator of the tailboard system is configured to execute the method. By means of the intelligent pressure adjusting control method, the action synchronism and stability of the tail plate in the lifting and overturning process are guaranteed, the clamping stagnation problem caused by unbalance loading is effectively solved, the reliability of equipment is improved, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of logistics equipment, in particular to a loading and unloading device for the tail of a vehicle, and more particularly to a pressure regulation control method and system for a tail plate. BACKGROUND

[0002] The existing tail plate structure is usually driven by a hydraulic cylinder, but the hydraulic cylinder needs to be provided with an exhaust pressure relief circuit, which is complex in structure. Some tail plates balance the pressure of the flip plate oil cylinder and the lifting oil cylinder through a balance oil cylinder, but the balance oil cylinder increases the structural complexity and manufacturing cost. Therefore, it is necessary to provide a simpler and more reliable tail plate structure. SUMMARY

[0003] The present application aims to solve the problems of complex structure and high cost in the prior art, and proposes a tail plate structure with an exhaust-free piston cylinder and pressure regulation, which realizes oil circuit pressure balance through a pressure regulator to ensure coordinated action.

[0004] A pressure regulation control method for a tail plate according to an embodiment of the first aspect of the present application, characterized in that the tail plate comprises a lifting oil cylinder and a flip plate oil cylinder, and a pressure regulator connected between the oil circuits of the lifting oil cylinder and the flip plate oil cylinder; the method is executed by the pressure regulator and comprises the following steps: 1) Real-time monitoring of the pressure of the lifting oil circuit and the flip plate oil circuit, the lifting oil circuit being connected to the rodless cavity of the lifting oil cylinder, and the flip plate oil circuit being connected to the rodless cavity of the flip plate oil cylinder; 2) When the pressure difference between the lifting oil circuit and the flip plate oil circuit exceeds a preset threshold, control the adjustable pressure difference valve in the pressure regulator to open, so that the hydraulic oil flows from the high pressure side oil circuit to the low pressure side oil circuit to realize pressure balance; 3) When the pressure difference decreases to below the preset threshold, control the adjustable pressure difference valve to close; Wherein, the preset threshold is set by adjusting the spring pre-tightening force of the adjustable pressure difference valve, and the range is between 0.5MPa and 1.0MPa.

[0005] According to the pressure regulating control method for the tail plate, the pressure difference between the lifting oil circuit and the plate turning oil circuit is monitored and dynamically balanced in real time by the pressure regulator, the pressure imbalance of the left and right oil circuits caused by the unbalanced load or the uneven load can be automatically and instantly eliminated, the action of the lifting oil cylinder and the plate turning oil cylinder can be kept accurate synchronization, and the problems of the tail plate in the lifting and turning process, such as the jamming, the shaking or the structural deformation, can be effectively avoided. The method sets a specific pressure difference threshold (0.5MPa to 1.0MPa) and accurately controls the spring pre-tightening force of the adjustable pressure difference valve, so that the response is fast, the adjustment accuracy is high, the independent balancing oil cylinder and other complex components in the traditional structure are omitted, the hydraulic system circuit is simplified, and the stability, the reliability and the service life of the tail plate are significantly improved.

[0006] According to some embodiments of the present application, the pressure regulator is a hydraulic integrated block structure, which is internally provided with oil channels in communication with each other, including a main oil inlet circuit, a lifting oil circuit, a plate turning oil circuit and an oil return circuit, and the adjustable pressure difference valve is arranged between the lifting oil circuit and the plate turning oil circuit.

[0007] According to the second aspect of the present application, the tail plate system comprises: a support frame, which comprises a cross beam, and outer support plates and inner support plates arranged at both ends of the cross beam; at least two force arms rotatably arranged on the support frame, the force arm comprising a follower frame rotatably connected to one end of the inner support plate, and a main arm rotatably hinged in the middle of the follower frame, and a crank arm arranged at one end of the main arm away from the follower frame; an inclined plate, which is provided with a triangular plate, one side of the triangular plate is attached to the inclined plate, and the end of the inclined plate is provided with an inclination angle for attaching to the ground; at least two lifting oil cylinders for lifting the force arm, one end of the lifting oil cylinder is rotatably hinged to the other end of the follower frame, and the other end is connected to the lower end of the crank arm; at least two plate turning oil cylinders for turning the inclined plate, one end of the plate turning oil cylinder is rotatably connected to the top corner of the triangular plate away from the inclined plate; The lifting oil cylinder and the plate turning oil cylinder each comprise a fixed end, a movable end and a non-exhaustion piston, and the non-exhaustion piston is provided with a one-way valve in the center; a pressure regulator configured to perform the pressure regulating control method as claimed or described.

[0008] According to the tail plate system of the embodiment of the present application, at least the following beneficial effects are achieved: by deeply combining mechanical structure and intelligent control method, a high-performance tail plate system is constructed, the tail plate system not only has the advantages of structural simplification and high reliability brought by the exhaust-free piston and the triangular plate connecting rod mechanism, but more importantly, the integrated pressure regulator can intelligently execute the pressure regulation control method, thereby endowing the entire tail plate system with dynamic pressure balance and self-adaptive synchronous control capability. The force arm of the embodiment is provided with a follow-up frame and a hinged structure of the main arm, so that the inclined plate can be switched from the horizontal state and the end-of-travel inclined state through fine adjustment of the lifting oil cylinder when the inclined plate is at the bottom end, the follow-up frame realizes the purpose of cost reduction and efficiency increase by replacing the traditional balance oil cylinder, and in addition, this enables the system to automatically and accurately adjust the lifting and plate turning actions when facing complex working conditions such as unbalanced load, thereby fundamentally eliminating the phenomena of jamming and shaking and ensuring the utmost stability and safety of the loading and unloading process. The design realizes the synergistic effect of hardware optimization and software intelligence, simplifies the overall architecture and reduces maintenance costs, and significantly improves the comprehensive performance and service life of the system.

[0009] According to some embodiments of the present application, the one-way valve comprises a valve body provided with a tapered hole, a valve core matched with the tapered hole, and a baffle limiting the valve core from sliding out of the tapered hole.

[0010] According to some embodiments of the present application, the inclined plate is provided with transverse ribs for enhancing the anti-deformation performance.

[0011] According to some embodiments of the present application, a fixed plate for mounting the pressure regulator is arranged in the middle of the cross beam, and the pressure regulator is connected with the lifting oil cylinder and the plate turning oil cylinder through pipelines.

[0012] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by practicing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings, in which: Figure 1 The control method of the embodiment of the present application is shown in the figure; Figure 2 The structure of the embodiment of the present application is shown in the figure; Figure 3 Another structure of the embodiment of the present application is shown in the figure; Figure 4 The oil circuit of the embodiment of the present application is shown in the figure; Figure 5 The internal structure of the lifting oil cylinder of the embodiment of the present application is shown in the figure.

[0014] 100, support frame; 110, outer support plate; 130, inner support plate; 140, cross beam; 150, fixing plate; 200, force arm; 210, follower frame; 220, main arm; 240, crank; 300, inclined plate; 310, cross rib; 400, lifting cylinder; 410, fixed end; 450, exhaust-free piston; 460, check valve; 461, valve body; 462, valve core; 463, baffle; 500, turning cylinder; 700, pressure regulator. DETAILED DESCRIPTION

[0015] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0016] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0017] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two. Greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0018] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0019] Example 1 Reference Figure 1 And Figure 4 The present embodiment provides a pressure regulation control method for a tail plate. The tail plate generally includes a lifting cylinder 400 and a turning cylinder 500, and a pressure regulator 700 connected between the oil circuits of the lifting cylinder 400 and the turning cylinder 500. The method is performed by the pressure regulator 700, and the core steps include: Step 1), real-time monitoring of the pressure of the lifting oil circuit and the flap oil circuit. Among them, the lifting oil circuit is connected with the rodless cavity of the lifting oil cylinder 400, and the flap oil circuit is connected with the rodless cavity of the flap oil cylinder 500. The pressure regulator 700 obtains these real-time pressure values by the pressure sensor integrated in it or by monitoring the pressure of the connected oil circuit.

[0020] Step 2), when the calculated pressure difference between the lifting oil circuit and the flap oil circuit exceeds the preset threshold value, the adjustable pressure difference valve in the pressure regulator 700 is opened. This action enables the hydraulic oil to automatically flow from the high-pressure side oil circuit to the low-pressure side oil circuit, thereby achieving pressure balance of the two sides of the oil circuit.

[0021] Step 3), when the pressure difference decreases below the preset threshold value, the adjustable pressure difference valve is closed to stop the compensation flow of hydraulic oil.

[0022] In this embodiment, the preset threshold value is set by adjusting the spring preload of the adjustable pressure difference valve. It can be understood that by adjusting the spring preload, the threshold value can be set to a specific value between 0.5MPa and 1.0MPa. For example, when the spring preload is set to correspond to 0.7MPa, the system starts the balancing action when the pressure difference reaches 0.7MPa.

[0023] The beneficial effects of this embodiment are that the method can dynamically and instantly eliminate the pressure imbalance between the lifting and flap oil circuits caused by unbalanced load through real-time monitoring and automatic feedback control. This ensures that the oil cylinders on the left and right sides can always remain accurately synchronized when the tail plate performs the lifting and turning compound action, fundamentally avoiding action jamming, structure shaking or deformation problems. At the same time, the method has clear logic, realizes control through mechanical setting of the adjustable pressure difference valve, responds quickly, has high reliability, and does not require a complex electronic control system to achieve intelligent pressure balance.

[0024] Embodiment 2 On the basis of embodiment 1, this embodiment further limits the pressure regulator 700.

[0025] Reference Figure 4 The pressure regulator 700 in this embodiment is a hydraulic integrated block structure. The integrated block is internally machined with oil circuits that are in communication with each other. These oil circuits include a main oil inlet circuit, a lifting oil circuit, a flap oil circuit, and a return oil circuit. Among them, the adjustable pressure difference valve, which is the core component for realizing the method in embodiment 1, is provided between the lifting oil circuit and the flap oil circuit.

[0026] The beneficial effects of the present embodiment are that: by adopting the hydraulic integrated block structure, the adjustable pressure difference valve and various oil paths are highly integrated in a compact block. This design greatly reduces the number of external connecting pipes and joints, thereby significantly reducing the leakage risk and space occupation of the hydraulic system. The integrated oil path layout makes the internal flow path shorter and the flow resistance smaller, improving the system response speed. At the same time, this structure facilitates mass production and on-site installation and maintenance, improving the reliability and economy of the entire tailgate system.

[0027] Embodiment 3 With reference to Figures 1 to 5 The present embodiment provides a tailgate system. The system includes a support frame 100, a force arm 200, a ramp plate 300, a lifting cylinder 400, a turning cylinder 500 and a pressure regulator 700.

[0028] The support frame 100 is used to fix the entire tailgate structure to the rear of the vehicle. The support frame 100 includes a cross beam 140. Each end of the cross beam 140 is provided with an outer support plate 110 and an inner support plate 130.

[0029] The number of force arms 200 is at least two. The force arm 200 includes a follower frame 210 rotatably connected to the inner support plate 130 at one end, and a main arm 220 rotatably connected to the middle of the follower frame 210, the end of the main arm 220 away from the follower frame 210 is provided with a crank arm 240. The crank arm 240 and the force arm 200 can be integrally formed, or can be fixedly connected by welding or fasteners.

[0030] The ramp plate 300 is the main component for carrying goods. The ramp plate 300 is connected to the upper end of the crank arm 240 through a hinge point. The end of the ramp plate 300 close to the ground is provided with an inclination angle to facilitate smooth fitting with the ground. A triangular plate is fixedly arranged on the ramp plate 300. One side of the triangular plate is firmly attached to the surface of the ramp plate 300.

[0031] The number of lifting cylinders 400 is at least two, which are used to provide lifting power. The cylinder end of the lifting cylinder 400 is rotatably connected to the other end of the follower frame 210. The piston rod end of the lifting cylinder 400 is hingedly connected to the lower end of the crank arm 240. By the extension and retraction of the lifting cylinder 400, the force arm 200 can be driven to rotate around the hinge point with the support frame 100, thereby realizing the overall lifting of the ramp plate 300. In addition, the force arm of the present embodiment is provided with a hinge structure of the follower frame and the main arm, so that when the ramp plate is at the bottom end, the ramp plate can be switched from the horizontal state and the end-of-travel ground contact inclined state through the fine adjustment of the lifting cylinder, which facilitates the tool car to enter the ramp plate from the end of the ramp plate. The linkage structure of the follower frame replaces the traditional balance cylinder, achieving the purpose of reducing cost and increasing efficiency.

[0032] The number of turning plate oil cylinders 500 is at least two, which are used to provide turning power. The cylinder end of the turning plate oil cylinder 500 is hinged to the support frame 100. The piston rod end of the turning plate oil cylinder 500 is hinged to the top corner of the triangular plate away from the inclined plate 300.

[0033] Both the lifting oil cylinder 400 and the turning plate oil cylinder 500 include a fixed end 410, a movable end, and a non-exhaustion piston 450. The non-exhaustion piston 450 is provided with a one-way valve 460 in the center.

[0034] The core of the embodiment is that the pressure regulator 700 included in the system is configured to perform the pressure regulation control method as described in Embodiment 1 or Embodiment 2. This means that the pressure regulator 700 has the necessary valve, oil circuit, and sensing or pressure feedback mechanism on the hardware, and is programmed or designed to automatically complete the pressure monitoring, comparison, and balancing operation in function.

[0035] The beneficial effect of the embodiment is that the tail plate system deeply integrates the optimized mechanical structure and intelligent control function, realizing the synergistic effect of hardware and software. The system not only obtains structural simplification and high reliability through the design of the triangular plate, the non-exhaustion piston, etc., but more importantly, through the pressure regulator specially configured, it has the dynamic pressure balancing and self-adaptive synchronous control capability. This enables the system to automatically and accurately maintain smooth action when facing complex unbalanced load working conditions in actual application, significantly improving the safety, efficiency of loading and unloading operation, and the service life of the equipment.

[0036] Embodiment 4 On the basis of Embodiment 3, the one-way valve 460 is further described in this embodiment.

[0037] Reference Figure 5 The one-way valve 460 includes a valve body 461, a valve core 462, and a baffle 463. The valve body 461 is internally provided with a tapered hole. The shape of the valve core 462 matches the tapered hole. The baffle 463 is fixedly arranged on the valve body 461 and is used to limit the valve core 462 from completely sliding out of the tapered hole.

[0038] The beneficial effect of the embodiment is that the one-way valve 460 has a simple and compact structure and is reliable in work. When hydraulic oil flows from the fixed end 410 to the movable end, the oil pressure pushes the valve core 462 against the tapered hole to achieve sealing, ensuring the effective maintenance of pressure during lifting and turning. When oil needs to flow back, the valve core 462 can be pushed open to allow oil to flow back, effectively avoiding the problem of blocked piston rod stroke or oil cylinder cavitation caused by oil accumulation, further ensuring the accuracy of each action of the tail plate and the reliability of long-term operation.

[0039] Embodiment 5 On the basis of Embodiment 3 or 4, the inclined plate 300 is further limited in this embodiment.

[0040] With reference to Figure 2 and Figure 3 , the inclined plate 300 is provided with a cross rib 310. The cross rib 310 can be integrally formed with the inclined plate 300 by stamping, or can be a separate reinforcing rib structure welded on the inclined plate 300.

[0041] The beneficial effect of this embodiment is that the cross rib 310 significantly enhances the structural rigidity and bending deformation resistance of the inclined plate 300. When carrying heavy goods, this design can effectively disperse the load and prevent excessive deflection deformation or permanent damage in the middle of the inclined plate 300, thereby prolonging the service life of the tail plate and improving the safety of equipment operation.

[0042] Embodiment 6 On the basis of any one of embodiments 3 to 5, this embodiment further describes the mounting structure of the pressure regulator 700.

[0043] With reference to Figure 2 and Figure 3 , a fixed plate 150 is provided at the middle position of the cross beam 140. The pressure regulator 700 is mounted on the fixed plate 150 by bolts. The pressure regulator 700 is connected to the lifting oil cylinder 400 and the flap oil cylinder 500 through metal pipes or high-pressure hoses.

[0044] The beneficial effect of this embodiment is that the fixed plate 150 provides a centralized, stable and centrally located mounting position for the pressure regulator 700. This layout makes the hydraulic pipe routing more regular, symmetrical and compact, not only beautiful, but more importantly, reduces the risk of pipe loosening, wear or interference caused by vehicle driving vibration. The centralized mounting method also greatly facilitates the installation, debugging, and subsequent maintenance and maintenance operations on site.

[0045] The above describes this embodiment in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge possessed by those skilled in the art in the technical field without departing from the true spirit of the present application.

Claims

1. A pressure regulating control method for a tailgate, characterized by, The tail plate comprises a lifting oil cylinder (400) and a turning plate oil cylinder (500), and a pressure regulator (700) connected between the oil circuits of the lifting oil cylinder (400) and the turning plate oil cylinder (500); the method is performed by the pressure regulator (700) and comprises the following steps: 1) Real-time monitoring of the pressure of the lifting oil circuit and the turning plate oil circuit, the lifting oil circuit being connected with the rodless cavity of the lifting oil cylinder (400), and the turning plate oil circuit being connected with the rodless cavity of the turning plate oil cylinder (500); 2) When the pressure difference between the lifting oil circuit and the turning plate oil circuit exceeds a preset threshold, the adjustable pressure difference valve in the pressure regulator (700) is controlled to open, so that hydraulic oil flows from the high-pressure side oil circuit to the low-pressure side oil circuit to achieve pressure balance; 3) When the pressure difference decreases to below the preset threshold, the adjustable pressure difference valve is controlled to close; Wherein, the preset threshold is set by adjusting the spring pre-tightening force of the adjustable pressure difference valve, and the range is between 0.5MPa and 1.0MPa.

2. The pressure regulating control method for a tailgate as set forth in claim 1, wherein: The pressure regulator (700) is a hydraulic integrated block structure, which is internally provided with oil channels in communication with each other, including a main oil inlet circuit, a lifting oil circuit, a turning plate oil circuit and an oil return circuit, and the adjustable pressure difference valve is arranged between the lifting oil circuit and the turning plate oil circuit.

3. A tailgate system characterized by, It comprises: a support frame (100) comprising a cross beam (140), and outer support plates (110) and inner support plates (130) arranged at both ends of the cross beam (140); at least two force arms (200) rotatably arranged on the support frame (100), the force arm (200) comprising a follower frame (210) rotatably connected to one end of the inner support plate (130), and a main arm (220) rotatably hinged in the middle of the follower frame (210), the main arm (220) being provided with a crank arm (240) at the end away from the follower frame (210); a tilt plate (300) provided with a triangular plate, one side of the triangular plate being attached to the tilt plate, and the tilt plate (300) being provided with an inclination angle for attaching to the ground; at least two lifting oil cylinders (400) for lifting the force arm (200), one end of the lifting oil cylinder (400) being rotatably hinged to the other end of the follower frame, and the other end being connected to the lower end of the crank arm (240); at least two turning plate oil cylinders (500) for turning the tilt plate (300), the top corner of the triangular plate away from the tilt plate being rotatably connected to one end of the turning plate oil cylinder (500); The lifting oil cylinder (400) and the turning plate oil cylinder (500) each comprise a fixed end (410), a movable end and a non-exhaustion piston (450), the center of the non-exhaustion piston (450) being provided with a one-way valve (460); a pressure regulator (700) configured to perform the pressure regulation control method of claim 1 or 2.

4. A tailgate system according to claim 3, wherein: The one-way valve (460) comprises a valve body (461) provided with a tapered hole, a valve core (462) matched with the tapered hole, and a baffle (463) limiting the valve core from sliding out of the tapered hole.

5. A tailgate system according to claim 3, wherein: The inclined plate (300) is provided with horizontal ribs (310) for reinforcing the deformation resistance.

6. A tailgate system according to claim 3, wherein: The horizontal beam (140) is provided with a fixing plate (150) for mounting the pressure regulator (700), and the pressure regulator (700) is connected with the lifting oil cylinder (400) and the turning plate oil cylinder (500) through pipelines.

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