Automatic constant pressure mechanism and manual lifting platform car

Abstract

The utility model belongs to the technical field of hydraulic devices, and particularly relates to an automatic constant pressure mechanism and a manual lifting platform truck, the automatic constant pressure mechanism comprises a hydraulic system, a lifting platform, a pressure boosting trigger piece, a pressure relief trigger piece and a pressure relief pull rope, and the lifting platform is connected with a hydraulic cylinder connected with the hydraulic system; the boosting triggering piece is connected with the hydraulic system and used for controlling boosting of the hydraulic system; the pressure relief triggering piece is connected with the hydraulic system and used for controlling pressure relief of the hydraulic system. One end of the pressure relief pull rope is connected with the pressure relief trigger piece, and the other end is connected with the lifting platform by pulling the trigger piece; and after the pulling trigger piece is lifted along with the lifting platform, the pressure relief trigger piece can be triggered through the pressure relief pull rope so as to control the hydraulic system to relieve pressure. The pressure relief pull rope is connected to the pressure relief triggering piece, so that the pressure relief triggering piece is pulled by the pressure relief pull rope to be stressed, pressure relief of the hydraulic system is controlled, and a safety protection effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic device technology, and in particular relates to an automatic constant pressure mechanism and a manual lifting platform vehicle. Background Technology

[0002] The traditional working principle of a manual hydraulic lifting platform is as follows: stepping on the pressure-up pedal extends the hydraulic cylinder, raising the platform; stepping on the pressure-relief pedal releases pressure, retracting the cylinder and lowering the platform. The entire process requires manual intervention to control the platform's movement. However, manual operation inevitably makes precise control difficult, especially when the platform is loaded with goods. Improper control can easily lead to the platform or its loaded items coming into direct contact with external objects at a certain height, causing interference and potential damage. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic constant pressure mechanism and a manual lifting platform vehicle, which aims to solve the technical problem that existing hydraulic lifting platforms are prone to damage due to contact with external objects because the lifting is difficult to control.

[0004] To achieve the above objectives, this utility model provides an automatic constant pressure mechanism, comprising:

[0005] Hydraulic system;

[0006] A lifting platform, wherein a hydraulic cylinder is connected to the lifting platform, and the hydraulic cylinder is connected to the hydraulic system;

[0007] A pressure boosting trigger is connected to the hydraulic system and is used to control the pressure boosting of the hydraulic system;

[0008] A pressure relief trigger is connected to the hydraulic system and is used to control the pressure relief of the hydraulic system;

[0009] A pressure relief pull member is provided, one end of which is connected to the pressure relief trigger member, and the other end is connected to the lifting platform through a pull trigger member; wherein, after the lifting platform is raised, the pull trigger member can be activated by the pressure relief pull member to control the pressure relief of the hydraulic system.

[0010] Optionally, the pressure relief pull member is a pressure relief pull rope, the other end of which is provided with a pull rope end, and the pull trigger member is provided with a pull rope through hole. The diameter of the pull rope through hole is larger than the outer diameter of the pressure relief pull rope and smaller than the outer diameter of the pull rope end, and the pressure relief pull rope passes through the pull rope through hole.

[0011] Optionally, the automatic constant pressure mechanism further includes a pull rope protection tube, through which the pressure relief pull rope passes, and the portion of the pressure relief pull rope that passes through the pull rope protection tube then passes through the pull rope through-hole.

[0012] Optionally, the pull rope protection tube is fixed below the lifting platform.

[0013] Optionally, the pull rope protection tube is a flexible hose or a shaped tube.

[0014] Optionally, the pressure relief trigger is a foot pedal, the bottom of which is provided with a connection hole, and one end of the pressure relief pull rope is connected to the connection hole.

[0015] Optionally, the boost trigger is a hand lever or a foot pedal.

[0016] Optionally, the pressure relief puller is a pressure relief linkage mechanism.

[0017] This utility model embodiment also provides a manual lifting platform vehicle, which includes the above-mentioned automatic constant pressure mechanism.

[0018] The automatic constant pressure mechanism and manual lifting platform vehicle provided in this utility model embodiment have at least one of the following technical effects: The automatic constant pressure mechanism provided by this utility model can be applied to at least a manual lifting platform vehicle. Specifically, the hydraulic system provides pressure power to the hydraulic cylinder. By controlling the pressure-increasing trigger, the hydraulic system is pressurized, thereby causing the hydraulic cylinder to drive the lifting platform to rise. By controlling the pressure-reducing trigger, the hydraulic system is depressurized, thereby causing the hydraulic cylinder to drive the lifting platform to descend. This working principle and process are conventional technologies in the field. Furthermore... When the pressure-boosting trigger controls the hydraulic system to pressurize so that the hydraulic cylinder drives the lifting platform to a certain height, the lifting platform pulls the pressure-relief trigger connected to it. Since the pressure-relief trigger is connected to the pressure-relief trigger, the pressure-relief trigger is pulled by the pressure-relief trigger and subjected to force, thereby controlling the pressure relief of the hydraulic system. At this time, the hydraulic system is in a depressurized state, and even if the pressure-boosting trigger is controlled again, the lifting platform will not continue to rise, thus playing a safety protection role. Furthermore, by adjusting the length of the pressure-relief trigger, the lifting height of the lifting platform can be adjusted. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The main structural view of the automatic constant pressure mechanism provided in the embodiment of this utility model.

[0021] Figure 2 A three-dimensional structural diagram of the automatic constant pressure mechanism provided in the embodiment of this utility model.

[0022] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A.

[0023] The following are the labeling elements in the figure:

[0024] 10—Lifting platform; 20—Pressure boosting trigger; 30—Pressure relief trigger.

[0025] 31—Connecting hole; 40—Pressure relief pull element; 41—Pull rope end

[0026] 50—Pull trigger element; 60—Pull rope protection tube; 70—Hydraulic cylinder. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description is based on the accompanying drawings. Figures 1-3 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] In one embodiment of this utility model, such as Figures 1-3 As shown, an automatic constant pressure mechanism is provided, including a hydraulic system (not shown), a lifting platform 10, a pressure-increasing trigger 20, a pressure-reducing trigger 30, and a pressure-reducing pull member 40. Preferably, the pressure-reducing pull member 40 is a pressure-reducing pull rope. A hydraulic cylinder 70 is connected to the lifting platform 10, and the hydraulic cylinder 70 is connected to the hydraulic system. Controlling the operation of the hydraulic cylinder 70 through the hydraulic system is a conventional technique in the art. For example, during pressure increase, the hydraulic cylinder 70 can control the lifting platform 10 to rise; during pressure reduction, the hydraulic cylinder 70 can control the lifting platform 10 to descend. That is, the more detailed pressure-increasing and pressure-reducing principles involving the hydraulic system are conventional techniques in the art and will not be elaborated here.

[0032] Furthermore, the pressure boosting trigger 20 is connected to the hydraulic system and is used to control the pressure boosting of the hydraulic system; that is, in this embodiment, the pressure boosting operation is achieved by controlling the pressure boosting trigger 20, for example, manually or electrically.

[0033] Furthermore, the pressure relief trigger 30 is connected to the hydraulic system and is used to control the pressure relief of the hydraulic system; that is, in this embodiment, the pressure relief is achieved by controlling the pressure boost trigger 20, for example, manually or electrically, and the manual operation here includes angular motion control.

[0034] like Figures 1-3 As shown, in this embodiment, one end of the added pressure relief rope is connected to the pressure relief trigger 30, and the other end of the pressure relief rope is connected to the lifting platform 10 via a pull trigger 50. The pull trigger 50, as the lifting platform 10 rises, can be activated by the pressure relief rope to trigger the pressure relief trigger 30, thereby controlling the pressure relief of the hydraulic system. The height at which the pull trigger 50 rises with the lifting platform 10 can be determined through product design. By setting a safe height, the lifting platform 10 is ensured to reach a point where the pressure relief rope triggers the pressure relief trigger 30, achieving a constant pressure state in the hydraulic system, thus preventing further rise and stabilizing the lifting platform 10 at a safe height.

[0035] Furthermore, the pull trigger 50 is preferably an L-shaped plate, with a vertical plate on one side for connecting to the lifting platform 10, and a horizontal plate on the bottom side for threading the pressure relief pull rope.

[0036] More specifically, the automatic constant pressure mechanism provided by this utility model can be applied to at least manual lifting platform vehicles. The hydraulic system provides pressure power to the hydraulic cylinder 70. The hydraulic system is pressurized by controlling the pressure-increasing trigger 20, causing the hydraulic cylinder 70 to drive the lifting platform 10 upwards. Conversely, the hydraulic system is depressurized by controlling the pressure-relief trigger 30, causing the hydraulic cylinder 70 to drive the lifting platform 10 downwards. This working principle is a conventional technique in the field. Furthermore, when the pressure-increasing trigger 20 pressurizes the hydraulic system to raise the lifting platform 10 to a certain height, the lifting platform 10 pulls the pressure-relief rope connected to the trigger 50. Since the pressure-relief rope is connected to the pressure-relief trigger 30, the trigger 30 is pulled by the rope and subjected to force, thus controlling the depressurization of the hydraulic system. At this time, the hydraulic system is in a depressurized state, and even if the pressure-increasing trigger 20 is continued to be controlled, the lifting platform 10 will not continue to rise, thus providing a safety protection function. Furthermore, the lifting height of the lifting platform 10 can be adjusted by adjusting the length of the pressure-relief rope.

[0037] If an instruction manual is required, the automatic constant pressure mechanism provided by this utility model is not only applicable to manual lifting platform vehicles. For example, it can also be applied to electric lifting platforms, hoisting platforms, and other platform devices that involve hydraulic systems for lifting control.

[0038] In another embodiment of this utility model, such as Figures 1-3 As shown, the other end of the pressure relief pull rope is provided with a pull rope end 41, and the pull trigger 50 is provided with a pull rope through hole (not shown). Further, the pull trigger 50 is preferably an L-shaped plate, and the pull rope through hole is provided on the horizontal plate on the bottom side of the L-shaped plate for the pressure relief pull rope to pass through. The diameter of the pull rope through hole is larger than the outer diameter of the pressure relief pull rope and smaller than the outer diameter of the pull rope end 41, and the pressure relief pull rope passes through the pull rope through hole. Specifically, in this structure, when the pull trigger 50 rises with the lifting platform 10 in the initial stage, it will not touch the pull rope end 41. However, after the pull trigger 50 rises to a certain height, it abuts against the pull rope end 41 and continues to rise, thus pulling the pull rope end 41, thereby pulling the pressure relief pull rope, and then pulling the pressure relief trigger 30, so that the hydraulic system is in a pressure relief balance state, and the lifting platform 10 will no longer continue to rise, thus maintaining a safe height position.

[0039] In another embodiment of this utility model, such as Figures 1-3As shown, the automatic constant pressure mechanism also includes a pull rope protection tube 60. The pressure relief pull rope passes through the pull rope protection tube 60, and a portion of the pressure relief pull rope that extends out of the pull rope protection tube 60 passes through the pull rope through-hole. Specifically, the pull rope protection tube 60 is provided for the pressure relief pull rope to pass through and to protect it, ensuring its reliable operation. A section of the pressure relief pull rope that extends out of the pull rope protection tube 60 is specifically used to pass through the pull trigger 50, which has a pull rope through-hole. This section is used to cooperate with the lifting platform 10 in rising, ensuring that the lifting platform 10 does not link with the pressure relief pull rope during the initial rising phase. Instead, it rises normally to the set height, and then the pressure relief trigger 30 pulls the pull rope end 41 to activate the pressure relief pull rope.

[0040] In another embodiment of this utility model, such as Figures 1-2 As shown, the pull rope protection tube 60 is fixed below the lifting platform 10. Specifically, placing the pull rope protection tube 60 below the lifting platform 10 is advantageous because the space is relatively large, and it also avoids interference with other components, thus preventing them from affecting the operation of other components.

[0041] In another embodiment of this utility model, the pull rope protection tube 60 is a flexible hose or a rigid tube. Depending on the specific working environment, a flexible hose or a rigid tube can be selected as the pull rope protection tube 60 for the pressure relief pull rope to pass through and to protect the pressure relief pull rope.

[0042] In another embodiment of this utility model, such as Figures 1-3 As shown, the pressure relief trigger 30 is a foot pedal, and a connection hole 31 is provided at the bottom of the foot pedal. One end of the pressure relief pull rope is connected to the connection hole 31. Specifically, the foot pedal is used as the pressure relief trigger 30. The operator can control the pressure relief of the hydraulic system by stepping on the foot pedal, and then control the hydraulic cylinder 70 through the hydraulic system to drive the lifting platform 10 to descend.

[0043] In another embodiment of this utility model, such as Figure 1 As shown, the pressure-increasing trigger 20 is a hand lever. Specifically, the hand lever is used as the pressure-increasing trigger 20. By pressing the hand lever, the operator can control the pressure increase of the hydraulic system, which in turn controls the hydraulic cylinder 70 to drive the lifting platform 10 to rise. Of course, in other embodiments, the pressure-increasing trigger 20 can also be a foot pedal.

[0044] like Figures 1-2As shown, this utility model embodiment also provides a manual lifting platform vehicle, which includes the aforementioned automatic constant pressure mechanism. Because this manual lifting platform vehicle has an automatic constant pressure mechanism, it ensures that when the lifting platform 10 rises to a certain height, the lifting platform 10 pulls the pressure relief rope connected to it by pulling the trigger 50. Since the pressure relief rope is connected to the pressure relief trigger 30, the pressure relief trigger 30 is pulled by the pressure relief rope and subjected to force, thereby controlling the pressure relief of the hydraulic system. At this time, the hydraulic system is in a pressure-relieved state, and even if the pressure-increasing trigger 20 is continued to be controlled, the lifting platform 10 will not continue to rise, thus providing a safety protection function.

[0045] In other embodiments, the pressure relief pull member is a pressure relief linkage mechanism (not shown). The pressure relief linkage mechanism can also link the pressure relief trigger 30 and the lifting platform 10. One end of the pressure relief linkage mechanism is connected to the pressure relief trigger 30, and the other end is connected to the lifting platform 10 via the pull trigger 50. When the lifting platform 10 rises to a certain height, it pulls the pressure relief linkage mechanism via the pull trigger 50. The other end of the pressure relief linkage mechanism then triggers the pressure relief trigger 30, thereby relieving pressure on the hydraulic system. This allows the entire hydraulic system to reach a constant pressure state, stabilizing the lifting platform 10 at the set height and preventing further increases, ensuring safety and reliability.

[0046] The pressure relief puller in this utility model is not limited to the two specific embodiments listed in the above embodiments. In essence, any structural component that can realize the linkage between the lifting platform 10 and the pressure relief trigger 30 belongs to the pressure relief puller and is within the protection scope of this utility model.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic constant pressure mechanism, characterized in that, include: Hydraulic system; A lifting platform, wherein a hydraulic cylinder is connected to the lifting platform, and the hydraulic cylinder is connected to the hydraulic system; A pressure boosting trigger is connected to the hydraulic system and is used to control the pressure boosting of the hydraulic system; A pressure relief trigger is connected to the hydraulic system and is used to control the pressure relief of the hydraulic system; A pressure relief pull member is provided, one end of which is connected to the pressure relief trigger member, and the other end is connected to the lifting platform through a pull trigger member; wherein, after the lifting platform is raised, the pull trigger member can be activated by the pressure relief pull member to control the pressure relief of the hydraulic system.

2. The automatic constant pressure mechanism according to claim 1, characterized in that, The pressure relief pull component is a pressure relief pull rope, and the other end of the pressure relief pull rope is provided with a pull rope end. The pull trigger component is provided with a pull rope through hole. The diameter of the pull rope through hole is larger than the outer diameter of the pressure relief pull rope and smaller than the outer diameter of the pull rope end. The pressure relief pull rope passes through the pull rope through hole.

3. The automatic constant pressure mechanism according to claim 2, characterized in that, It also includes a pull rope protection tube, through which the pressure relief pull rope passes, and the pressure relief pull rope that partially passes through the pull rope protection tube passes through the pull rope through the hole.

4. The automatic constant pressure mechanism according to claim 3, characterized in that, The pull rope protection tube is fixed below the lifting platform.

5. The automatic constant pressure mechanism according to claim 3, characterized in that, The pull rope protection tube is a flexible hose or a shaped tube.

6. The automatic constant pressure mechanism according to claim 2, characterized in that, The pressure relief trigger is a foot pedal, and a connection hole is provided at the bottom of the foot pedal. One end of the pressure relief pull rope is connected to the connection hole.

7. The automatic constant pressure mechanism according to claim 1, characterized in that, The boost trigger is a hand lever or a foot pedal.

8. The automatic constant pressure mechanism according to claim 1, characterized in that, The pressure relief pull component is a pressure relief linkage mechanism.

9. A manually operated lifting platform vehicle, characterized in that, Includes the automatic constant pressure mechanism as described in any one of claims 1 to 7.

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