Double-lifting-oil-cylinder linkage hydraulic device of high-position shear fork platform

Abstract

The utility model discloses a high-position shears-fork platform double-lifting oil cylinder linkage hydraulic device which comprises a base, a shears-fork frame and an operation platform, a bottom frame is arranged at the top of the base, two oil cylinders are arranged in the middle of the bottom frame, a first liquid feeding pipe and a second liquid feeding pipe are arranged on the two oil cylinders respectively, a hydraulic station is arranged on the side edge of the base, and the two oil cylinders are connected with the hydraulic station. A third liquid feeding pipe is arranged on the side wall of the hydraulic station, the first liquid feeding pipe and the second liquid feeding pipe are communicated with the third liquid feeding pipe through a three-way connecting piece, the three-way connecting piece comprises a first connecting pipe, a second connecting pipe and a third connecting pipe, and movable blocks are arranged in the first connecting pipe and the second connecting pipe; the two movable blocks increase resistance to fed oil through elasticity. The double-lifting oil cylinder has the advantages that resistance can be increased for oil liquid, so that the oil liquid feeding speed is reduced, the oil liquid enters the oil cylinder when the pressure of the oil liquid is the same, synchronization errors of starting of the oil cylinder are avoided to the maximum extent, and driving synchronism of the double-lifting oil cylinder is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to a kind of hydraulic device, specifically related to a high-position scissor platform double-lifting cylinder linkage hydraulic device. BACKGROUND

[0002] The scissor platform realizes the lifting function through the scissor-type mechanical structure. When the double-cylinder lifting drive is synchronized, the two oil cylinders are extended and retracted, pushing the scissor arm to expand or fold, thereby driving the platform to rise or fall. The driving force provided by the two oil cylinders is greater, and it can withstand greater load, suitable for simultaneous operation of multiple people or carrying heavier tools and materials.

[0003] In the prior art, some double-lifting cylinders of the scissor platform have a small synchronization error when working, which can easily cause the double-cylinder lifting to be out of sync. The small synchronization error also affects the normal work of the inspection platform, and it is not easy to adjust, which can affect the normal lifting of the scissor platform, causing the scissor platform to be unable to lift stably, and even causing damage to the structural components and oil cylinders of the scissor platform. SUMMARY

[0004] The utility model aims at providing a high-position scissor platform double-lifting cylinder linkage hydraulic device, which solves the problem of double-lifting cylinder driving out of sync and not easy to adjust in the prior art.

[0005] The above technical purpose of the utility model is mainly solved by the following technical scheme: a high-position scissor platform double-lifting cylinder linkage hydraulic device, comprising a base, a scissor frame arranged on the top of the base, and a work platform arranged on the top of the scissor frame. The top of the base is provided with a chassis connected with the bottom of the scissor frame. The middle of the chassis is provided with two oil cylinders arranged in parallel and used for driving the lifting action of the scissor frame. The first and second oil delivery pipes are arranged on the two oil cylinders respectively. The side of the base is provided with a hydraulic station. The side wall of the hydraulic station is provided with a third oil delivery pipe. The first and second oil delivery pipes are communicated with the third oil delivery pipe through a three-way connector. The three-way connector comprises a first connecting pipe and a second connecting pipe connected with the first and second oil delivery pipes respectively, and a third connecting pipe connected with the third oil delivery pipe. The first and second connecting pipes are both provided with a movable block inside for controlling the opening and closing of the first and second connecting pipes and can be axially elastically moved. The two movable blocks increase the resistance of the oil entering from the third connecting pipe.

[0006] As a further preferred technical scheme of the utility model, the inner wall of the first and second connecting pipes is provided with an annular protrusion that can cooperate with the movable block to close the first or second connecting pipe.

[0007] As a further preferred technical solution of this utility model, a bracket is provided on the side of the movable block near the third connecting pipe, which is connected to the inner wall of the first connecting pipe or the second connecting pipe, and the movable block is movably connected to the bracket.

[0008] As a further preferred technical solution of this utility model; a fixed block is provided in the middle of the bracket, a fixed cylinder is provided on the fixed block extending toward the movable block, a sliding column is provided on the movable block passing through the fixed cylinder and slidingly engaging with the fixed cylinder, and a telescopic spring is provided on the end face of the movable block, which is connected to the end of the fixed cylinder and sleeved around the sliding column.

[0009] As a further preferred technical solution of this utility model, the end face of the fixing block facing the third connecting pipe is provided with a dome structure, and the channel of the fixing cylinder cooperating with the sliding column passes through the fixing block and communicates with the first connecting pipe or the second connecting pipe.

[0010] As a further preferred technical solution of this utility model, a diversion plate extending into the third connecting pipe is provided at the connection center of the first connecting pipe and the second connecting pipe.

[0011] Therefore, this utility model has the advantages of increasing the resistance of the oil entering the first connecting pipe and the second connecting pipe respectively, so as to delay the speed at which the oil is sent into the first delivery pipe and the second delivery pipe, so that the oil pressure enters the oil cylinder at the same time, thereby minimizing the synchronization error of the oil cylinder starting, ensuring the driving synchronization of the dual lifting oil cylinders, and avoiding the trouble of adjusting the synchronization accuracy. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 yes Figure 1 A structural cross-sectional view of the tee connector in the middle;

[0014] Figure 3 yes Figure 2 Enlarged view of the structure at point A in the diagram.

[0015] Reference numerals: Base-1, Base frame-11, Oil cylinder-12, First liquid delivery pipe-121, Second liquid delivery pipe-122, Hydraulic station-13, Third liquid delivery pipe-131, Scissor lift-2, Working platform-3, T-connector-4, First connecting pipe-41, Second connecting pipe-42, Third connecting pipe-43, Movable block-44, Sliding column-441, Telescopic spring-442, Annular protrusion-45, Bracket-46, Fixed block-461, Fixed cylinder-462, Diverter plate-47. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] like Figures 1-2 As shown, a high-level scissor lift platform with dual lifting cylinder linkage hydraulic device includes a base 1, a scissor lift 2 mounted on top of the base 1, and a working platform 3 mounted on top of the scissor lift 2. The base 1 has a base frame 11 connected to the bottom of the scissor lift 2. Two parallel hydraulic cylinders 12 are located in the middle of the base frame 11 to drive the lifting and lowering action of the scissor lift 2. Each of the two cylinders 12 has a first hydraulic pipe 121 and a second hydraulic pipe 122 for supplying hydraulic fluid. The first and second hydraulic pipes 121 and 122 are respectively connected to the two cylinders 12 to supply hydraulic oil, thereby driving the scissor lift 2 to perform lifting and lowering actions. The two cylinders 12 are parallel to each other and operate in parallel. The base 1 has a hydraulic station 13 on its side. The hydraulic station 13 is existing technology and will not be described in detail here. The hydraulic station 13 is connected to two hydraulic cylinders 12, precisely controlling and distributing the hydraulic oil pressure and delivery volume into the cylinders 12 to ensure the stability and reliability of the cylinders 12 when driving the scissor lift 2. A third fluid delivery pipe 131 is provided on the side wall of the hydraulic station 13. The first fluid delivery pipe 121 and the second fluid delivery pipe 122 are connected to the third fluid delivery pipe 131 via a three-way connector 4. The three-way connector 4 includes a first connecting pipe 41 and a second connecting pipe 42 respectively connected to the first fluid delivery pipe 121 and the second fluid delivery pipe 122, and a connector connected to the third fluid delivery pipe 131. The third connecting pipe 43 of the hydraulic station 13 is connected to the third connecting pipe 131 of the three-way connector 4. The first and second connecting pipes 121 and 122, which are connected to the cylinder 12, are respectively connected to the first connecting pipe 41 and the second connecting pipe 42 to realize the synchronous delivery of hydraulic oil to the double lifting cylinder 12. The first and second connecting pipes 41 and 42 are each provided with movable blocks 44 that are axially elastic and used to control the opening and closing of the first and second connecting pipes 41 and 42. The two movable blocks 44 increase the resistance of the oil delivered from the third connecting pipe 43 through elasticity. The two movable blocks 44 are connected to the first and second connecting pipes 41 and 42. The elastic movement of the cylinder 2 increases the resistance of the oil fed into the first connecting pipe 41 and the second connecting pipe 42, thereby slowing down the speed at which the oil is fed into the first delivery pipe 121 and the second delivery pipe 122. After the amount of oil in the first connecting pipe 41 and the second connecting pipe 42 is consistent and reaches a certain pressure, the movable block 44 is opened synchronously, ensuring the synchronicity of the oil delivery to the first delivery pipe 121 and the second delivery pipe 122. This avoids deviations in the amount and pressure of oil fed into the first connecting pipe 41 and the amount and pressure of oil fed into the second connecting pipe 42, which would prevent the two cylinders 12 from starting synchronously, thus ensuring the synchronous starting of the dual lifting cylinders 12.

[0018] like Figure 2As shown, a diversion plate 47 extending into the third connecting pipe 43 is provided at the connection center of the first connecting pipe 41 and the second connecting pipe 42. The diversion plate 47 forms a seal at the connection center of the first connecting pipe 41 and the second connecting pipe 42, separating the first connecting pipe 41 and the second connecting pipe 42 and extending into the third connecting pipe 43 to divert the oil filling the third connecting pipe 43 in advance. This avoids the accumulation space at the connection of the first connecting pipe 41 and the second connecting pipe 42, which would prevent the oil from flowing accurately, quickly, synchronously, and in equal amounts to the first connecting pipe 41 and the second connecting pipe 42. This further enhances the diversion synchronization and consistency of the oil delivery and ensures reliable synchronous starting of the dual lifting cylinders 12.

[0019] like Figures 2-3 As shown, the inner walls of the first connecting pipe 41 and the second connecting pipe 42 are each provided with annular protrusions 45 that can cooperate with the movable block 44 to seal the first connecting pipe 41 or the second connecting pipe 42. The outer wall of the movable block 44 abuts against and seals the inner wall of the annular protrusion 45. When the oil arrives, it can push the movable block 44 to separate the movable block 44 from the annular protrusion 45, thereby allowing the oil to be sent into the first delivery pipe 121 and the second delivery pipe 122. The movable block 44 has a side near the third connecting pipe 43 that connects to the first connecting pipe 41 or the second connecting pipe 42. The bracket 46 is connected to the inner wall of the connector 42. The movable block 44 is movably connected to the bracket 46. A fixed block 461 is provided in the middle of the bracket 46. A fixed cylinder 462 extending toward the movable block 44 is provided on the fixed block 461. A sliding column 441 passing through the fixed cylinder 462 and slidingly engaging with the fixed cylinder 462 is provided on the movable block 44. The bracket 46 is fixed to the fixed cylinder 462 by the fixed block 461, so that the movable block 44 can be positioned on the fixed cylinder 462 by the sliding column 441, and the movable block 44 can slide axially along the sliding column 441. To accommodate the opening and closing of the pipeline due to oil pressure, a telescopic spring 442 is provided on the end face of the movable block 44, which is connected to the end of the fixed cylinder 462 and sleeved around the sliding column 441. The telescopic spring 442 is provided to increase the elastic resistance of the movable block 44, thereby increasing the resistance to the oil delivery and thus increasing the oil delivery pressure, enabling synchronous oil delivery. It also assists the movable block 44 in quickly returning to its original position. The end face of the fixed block 461 facing the third connecting pipe 43 is designed with a dome structure, which can reduce the resistance to the oil and improve the oil delivery efficiency. To improve flow efficiency, the channel between the fixed cylinder 462 and the sliding column 441 connects the fixed block 461 to the first connecting pipe 41 or the second connecting pipe 42. When the oil is sent from the third connecting pipe 43 into the first connecting pipe 41 or the second connecting pipe 42, some of the oil can enter the channel between the fixed cylinder 462 and the fixed block 461 to slow down the pushing speed of the sliding column 441 and the movable block 44, thereby enhancing the synchronicity of the oil being sent into the first connecting pipe 41 and the second connecting pipe 42, and thus enhancing the synchronicity of the driving of the two oil cylinders 12.

[0020] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A high-position scissor lift platform with dual lifting cylinder linkage hydraulic device, comprising a base (1), a scissor lift frame (2) disposed on top of the base (1), and a working platform (3) disposed on top of the scissor lift frame (2), characterized in that: The base (1) has a base frame (11) at the top that connects to the bottom of the scissor lift (2). The base frame (11) has two parallel hydraulic cylinders (12) in the middle for driving the scissor lift (2) to lift. Each of the two cylinders (12) has a first delivery pipe (121) and a second delivery pipe (122) for delivering hydraulic fluid. The base (1) has a hydraulic station (13) on its side. The hydraulic station (13) has a third delivery pipe (131) on its side wall. The first delivery pipe (121), the second delivery pipe (122), and the third delivery pipe (131) are connected by a... The three-way connector (4) is connected to the first liquid delivery pipe (121) and the second liquid delivery pipe (122) respectively, and the third liquid delivery pipe (43) is connected to the third liquid delivery pipe (131). The first connecting pipe (41) and the second connecting pipe (42) are respectively provided with movable blocks (44) for controlling the opening and closing of the first connecting pipe (41) and the second connecting pipe (42) and can move axially elastically. The two movable blocks (44) increase the resistance to the oil fed from the third connecting pipe (43) through elasticity.

2. The high-position scissor lift platform dual-lifting cylinder linkage hydraulic device according to claim 1, characterized in that: The inner walls of the first connecting pipe (41) and the second connecting pipe (42) are provided with annular protrusions (45) that can cooperate with the movable block (44) to close the first connecting pipe (41) or the second connecting pipe (42).

3. The high-position scissor lift platform with dual lifting cylinder linkage hydraulic device according to claim 1, characterized in that: The movable block (44) is provided with a bracket (46) on the side near the third connecting pipe (43) that is connected to the inner wall of the first connecting pipe (41) or the second connecting pipe (42), and the movable block (44) is movably connected to the bracket (46).

4. The high-position scissor lift platform dual-lifting cylinder linkage hydraulic device according to claim 3, characterized in that: The bracket (46) has a fixed block (461) in the middle, and a fixed cylinder (462) extending toward the movable block (44) is provided on the fixed block (461). The movable block (44) has a sliding column (441) that passes through the fixed cylinder (462) and slides with the fixed cylinder (462). The end face of the movable block (44) has a telescopic spring (442) that is connected to the end of the fixed cylinder (462) and sleeved around the sliding column (441).

5. The high-position scissor lift platform dual-lifting cylinder linkage hydraulic device according to claim 4, characterized in that: The end face of the fixed block (461) facing the third connecting pipe (43) is set in a dome structure. The channel of the fixed cylinder (462) and the sliding column (441) passes through the fixed block (461) and communicates with the first connecting pipe (41) or the second connecting pipe (42).

6. The high-position scissor lift platform dual-lifting cylinder linkage hydraulic device according to claim 1, characterized in that: A diverter plate (47) extending into the third connecting pipe (43) is provided at the connection center of the first connecting pipe (41) and the second connecting pipe (42).

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