Hydraulic supporting leg suitable for rapid leveling on uneven supporting face and lifting working platform

Abstract

The utility model discloses a hydraulic supporting leg suitable for rapid leveling on an uneven supporting surface and a lifting working platform, belongs to lifting operation equipment suitable for high-altitude operation, and solves the problem that an existing hydraulic supporting leg is difficult to adapt to rapid extension and contraction on the uneven supporting surface. A parallelogram mechanism is formed by the support, the sliding sleeve, the first connecting rod and the second connecting rod, so that the sliding sleeve swings, ascends and descends relative to the support and stretches and folds the hydraulic supporting leg. The hydraulic oil cylinder acts on the parallelogram mechanism to enable a parallelogram to deform and fix the sliding sleeve to the needed position. The stand column is vertically arranged in the sliding hole of the sliding sleeve in a penetrating mode, can slide up and down and is limited in the sliding hole of the sliding sleeve, and a plurality of pin holes capable of being located below the sliding sleeve are distributed in the stand column in the vertical direction. During supporting, the stand columns of the hydraulic supporting legs slide to the supporting faces below the stand columns by sliding relative to the sliding sleeves, and then the plug pins are inserted into the pin holes below the sliding sleeves and bear the sliding sleeves. The leveling operation is simple and convenient, and rapid stretching and contracting are achieved.

Description

Technical Field

[0001] This utility model relates to lifting equipment suitable for high-altitude operations, specifically a hydraulic outrigger and lifting work platform suitable for rapid leveling on uneven support surfaces, enabling fast, stable, and adaptable support operations to different terrains. Background Technology

[0002] Common hydraulic outriggers used in lifting work platforms generally include H-type, frog-leg, and spider (leg) types. H-type outriggers occupy a large space and have a relatively long deployment time. Frog-leg outriggers have a limited span, restricting the platform's stability and load-bearing capacity, and also require a high degree of ground flatness. Spider-type outriggers, due to the large proportional relationship between the cylinder's point of action, the outrigger feet, and the outrigger rod's swing fulcrum, even small cylinder extensions can cause significant horizontal slippage of the outrigger plates on the support surface, negatively impacting the lifting work platform's support process.

[0003] Therefore, there is a technical need for hydraulic outriggers for lifting work platforms that can adapt to uneven support surfaces (especially steep slopes), occupy little space, extend and retract quickly, and are easy to level and control. This is to improve work efficiency and the stability and safety of the support. Utility Model Content

[0004] The technical objective of this invention is to overcome the shortcomings of existing hydraulic outriggers, such as their inability to adapt to rapid extension and retraction on uneven support surfaces, and to provide a hydraulic outrigger and lifting work platform suitable for rapid leveling on uneven support surfaces.

[0005] To achieve the above objectives, the hydraulic outrigger of this utility model, suitable for rapid leveling on uneven support surfaces, includes:

[0006] The support has a first hinge position and a second hinge position.

[0007] The sliding sleeve has a vertical sliding hole, on which a third hinge position and a fourth hinge position are provided;

[0008] A first link and a second link are arranged in parallel. The first link is connected between the first hinge position and the fourth hinge position, and the second link is connected between the second hinge position and the third hinge position. The first hinge position, the second hinge position, the third hinge position and the fourth hinge position are located at the four vertices of a parallelogram.

[0009] The support, sliding sleeve, first link and second link form a parallelogram mechanism that allows the sliding sleeve to swing and rise and fall relative to the support, as well as to extend and retract the hydraulic outriggers.

[0010] A hydraulic cylinder acts on a parallelogram mechanism to deform the parallelogram and fix the sliding sleeve in the desired position.

[0011] The column is upright and can slide up and down through the sliding hole of the sliding sleeve and is confined within the sliding hole of the sliding sleeve. Several pin holes that can be located below the sliding sleeve are distributed on its upper and lower sides.

[0012] A pin is used to insert into a pin hole located below the slide sleeve and to carry the slide sleeve.

[0013] Accordingly, when the hydraulic outriggers are deployed for support, the hydraulic cylinders cause the parallelogram to deform, and the swinging of the first and second connecting rods causes the sliding sleeve and column to swing downwards to deploy the hydraulic outriggers. Since the column is upright and can slide vertically through the sliding hole of the sliding sleeve, different hydraulic outriggers operate synchronously on uneven support surfaces until the connecting rods of each hydraulic outrigger approach horizontality and the parallelogram mechanisms of each hydraulic outrigger maintain a consistent posture. The columns of each hydraulic outrigger slide down to their respective support surfaces via the sliding sleeve, and then the pins are inserted into the pin holes located below the sliding sleeve. The hydraulic cylinders continue to cause the parallelograms to deform, thus the columns bear force and support the lifting work platform by supporting the sliding sleeve through the pins. Therefore, this hydraulic outrigger is suitable for both flat and uneven support surfaces. Moreover, during the unfolding and leveling process, it is not necessary to level each hydraulic outrigger individually. Instead, all hydraulic outriggers move together, making the leveling operation simple and convenient. This enables rapid extension and retraction, improving work efficiency and the stability and safety of the support.

[0014] The hydraulic outrigger extends and retracts using a parallelogram mechanism, taking up little space.

[0015] Preferably, the column is provided with a limiting edge located above the sliding sleeve. The limiting edge is blocked by the sliding sleeve to prevent the column from disengaging downward from the sliding hole of the sliding sleeve. When the first and second connecting rods swing the sliding sleeve and the column upward to retract the hydraulic outrigger, the column is prevented from disengaging downward from the sliding hole of the sliding sleeve. Therefore, when retracting the hydraulic outrigger, it is only necessary to deform the parallelogram with the hydraulic cylinder, without adding any additional operations, making the operation convenient.

[0016] Preferably, the column is provided with several horizontal bushings, and the pin holes are formed in the corresponding bushings. This facilitates the smooth insertion of the pin into the pin hole and optimizes the stress on the pin and pin hole, avoiding stress concentration on the pin and pin hole that could cause deformation.

[0017] Preferably, the bushing and the pin are separately provided with positioning grooves and elastically retractable positioning tumblers. The positioning tumblers are located in the positioning grooves to position the pin in the bushing. This ensures that the pin does not freely detach from the pin hole when there is no axial thrust, avoiding accidental pin falling out of the pin hole, which could cause column support failure and safety accidents, and increasing the safety of the pin connection.

[0018] Preferably, the inner wall of the sliding hole is provided with a sliding plate, which guides the column and ensures that the column can slide and extend freely within the sliding hole. Furthermore, relying on the sliding guiding effect of the sliding plate, the gap between the column and the sliding hole can be minimized, reducing the swaying of the column within the sliding hole and ensuring the proper working posture of the column.

[0019] Preferably, the hydraulic cylinder is connected between the support and the sliding sleeve. The extension direction of the hydraulic cylinder is aligned with that of the first and second connecting rods, so that when the entire hydraulic outrigger is retracted, the hydraulic cylinder, the first and second connecting rods are brought together, reducing the space occupied.

[0020] Preferably, the first and second links are two coaxially arranged links. This ensures the structural and stress stability of the hydraulic outrigger, increases its resistance to deformation, and reduces its weight while maintaining its support capacity.

[0021] The aforementioned hydraulic outriggers are preferably used to support a lifting work platform, i.e., the lifting work platform is equipped with the hydraulic outriggers. For example, the hydraulic outriggers can be installed at the four corners of the base frame of the lifting work platform.

[0022] Preferably, the hydraulic outriggers are rotatably mounted on the base frame via supports about a vertical axis. This allows the hydraulic outriggers to be rotated about the vertical axis as needed, adjusting their position on the support surface.

[0023] Preferably, the first hinge position is closer to the base frame than the second hinge position, and the fourth hinge position is closer to the third hinge position, allowing the first and second links, along with the sliding sleeve and the column, to flip upwards to retract the hydraulic outriggers. Accordingly, when the hydraulic outriggers are in the retracted state, it is advantageous to bring the first and second links together, reducing the space they occupy.

[0024] This utility model comprises a support, a sliding sleeve, a first connecting rod, and a second connecting rod, forming a parallelogram mechanism for the sliding sleeve to swing and rise / fall relative to the support, as well as for extending and retracting the hydraulic outrigger. A hydraulic cylinder acts on the parallelogram mechanism, causing the parallelogram to deform and fixing the sliding sleeve in the desired position. A vertical column, slidably inserted into and confined within the sliding hole of the sliding sleeve, has several pin holes distributed along its vertical direction, allowing it to be located below the sliding sleeve. A pin is inserted into the pin holes located below the sliding sleeve and supports the sliding sleeve. This design allows the hydraulic outrigger to be used on both flat and uneven support surfaces.

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. When supporting the entire lifting platform, even if the different hydraulic outriggers are at different heights, the initial force state of the hydraulic cylinders is very similar, which makes it easy to drive the parallelogram mechanism to deform at the fastest speed to complete the support operation.

[0027] 2. The connecting rods of the parallelogram mechanism can reach a basically horizontal state. Using this as a reference, the horizontal displacement caused by the swing of the connecting rods, sliding sleeves and columns during the process of supporting the entire lifting platform is minimized, which is conducive to maintaining overall stability during support operations.

[0028] 3. The hydraulic outriggers supporting the lifting work platform have minimal mutual interference. They extend and retract using a parallelogram mechanism, occupying minimal space. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the hydraulic outrigger of this utility model;

[0030] Figure 2 for Figure 1 Top view;

[0031] Figure 3 for Figure 2 Sectional view along axis AA;

[0032] Figure 4 for Figure 3 Enlarged view of the BB-direction cross section;

[0033] Figure 5 for Figure 3 CC-direction sectional view;

[0034] Figure 6 for Figure 5 A schematic diagram of the pin being inserted into the sliding hole;

[0035] Figure 7 for Figure 6 Enlarged cross-sectional view along the DD direction;

[0036] Figure 8 for Figure 1 A perspective view of the hydraulic outrigger shown from one angle;

[0037] Figure 9 for Figure 1 Another perspective view of the hydraulic outrigger shown;

[0038] Figure 10 for Figure 1 The diagram shows the hydraulic outriggers mounted on the base frame.

[0039] Figure 11 for Figure 1 A schematic diagram showing the hydraulic outriggers in the retracted state;

[0040] Figure 12 for Figure 3 A schematic diagram showing the hydraulic outriggers in the retracted state;

[0041] Explanation of the labels in the diagram:

[0042] 100 hydraulic outriggers

[0043] 110 Support, A First Hinge Position, B Second Hinge Position, 111 Upper Shaft Section, 112 Lower Shaft Section

[0044] 120 Sliding sleeve, 121 Sliding hole, 122 Slide plate, C Third hinge position, D Fourth hinge position.

[0045] 130 First Link

[0046] 140 second link,

[0047] 150 hydraulic cylinder,

[0048] 160 Column, 161 Bushing, 162 Pin Hole, 163 Positioning Slot, 164 Limiting Edge

[0049] 170 pin, 171 positioning tumbler;

[0050] 200 base frame. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0053] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0054] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0055] Figure 1-3 , Figure 8-9The structure of a hydraulic outrigger 100 is shown, which is adapted to quickly level on uneven support surfaces, as detailed below.

[0056] The hydraulic outrigger 100 includes a support 110, a sliding sleeve 120, a first connecting rod 130, a second connecting rod 140, a hydraulic cylinder 150, a column 160, and a pin 170.

[0057] Support 110 serves as the base for deploying and retracting the hydraulic outriggers, and also for mounting the hydraulic outriggers 100 onto the lifting work platform. Support 110 has a first hinge position A and a second hinge position B. The support is a structural component, assembled as needed, such as by welding.

[0058] The main body of the sliding sleeve 120 is a vertical square tube. Therefore, the sliding sleeve 120 has a vertical sliding hole 121. The sliding sleeve 120 is provided with a third hinge position C and a fourth hinge position D. The sliding sleeve 120 is a structural component, assembled as needed, such as by welding, and its main body can be directly made of tubing.

[0059] The first link 130 and the second link 140 are arranged in parallel. The first link 130 is connected between the first hinge position A and the fourth hinge position D via a first pin and a fourth pin, and the second link 140 is connected between the second hinge position B and the third hinge position C via a second pin and a third pin. Figure 1 , Figure 3 In the orthographic projection view, the first hinge point A, the second hinge point B, the third hinge point C, and the fourth hinge point D are all represented as mounting holes and pins, each abstracted as a point, i.e., a vertex of parallelogram ABCD. Therefore, the support 110, the sliding sleeve 120, the first connecting rod 130, and the second connecting rod 140 constitute a parallelogram mechanism. This parallelogram mechanism allows the sliding sleeve 120 to swing and rise and fall relative to the support 110, as well as to extend and retract the hydraulic outrigger 100. The lengths of the first connecting rod 130 and the second connecting rod 140 are determined by the overall anti-tipping requirements of the machine.

[0060] Hydraulic cylinder 150 acts on the parallelogram mechanism, causing parallelogram ABCD to deform and fixing sleeve 120 in the desired position. Specifically, hydraulic cylinder 150 is connected between support 110 and sleeve 120. The extension direction of the hydraulic cylinder is aligned with that of the first and second connecting rods, so that when the entire hydraulic outrigger is retracted, the hydraulic cylinder, first connecting rod, and second connecting rod are brought together, reducing the space occupied.

[0061] The column 160 is used to support vertical weight. The column 160 is upright and slides vertically through the sliding hole 121 of the sliding sleeve 120 and is confined within the sliding hole of the sliding sleeve. Several pin holes 162 are distributed along the vertical direction on the column 160, which can be located below the sliding sleeve. In order to increase the contact area with the supporting surface, the lower end of the column is connected to a support foot.

[0062] Pin 170 is inserted into pin hole 162 located below the slide sleeve and carries the slide sleeve.

[0063] The hydraulic outrigger 100 extends and retracts via a parallelogram mechanism, and the sliding sleeve maintains its own posture during the deformation of the parallelogram mechanism, keeping the column upright.

[0064] In the illustrated structure, the column 160 is provided with a limiting edge 164 located above the sliding sleeve. The limiting edge 164 is blocked by the sliding sleeve 120, preventing the column from disengaging downward from the sliding hole of the sliding sleeve. When the first connecting rod 130 and the second connecting rod 140 swing the sliding sleeve 120 and the column 160 upward to retract the hydraulic outrigger, the column is prevented from disengaging downward from the sliding hole of the sliding sleeve. Therefore, when retracting the hydraulic outrigger, it is only necessary to deform the parallelogram with the hydraulic cylinder, without adding any additional operations, making the operation convenient.

[0065] In the illustrated structure, the column 160 is provided with several horizontal bushings 161, and pin holes 162 are formed in the corresponding bushings 161. This facilitates the smooth insertion of the pin into the pin hole and optimizes the force distribution between the pin and the pin hole, avoiding deformation caused by concentrated force on the pin and pin hole.

[0066] See Figure 5-7 The bushing 161 and the pin 162 are respectively provided with a positioning groove 163 and a resiliently retractable positioning ball 171. The positioning ball is located in the positioning groove to position the pin in the bushing. This ensures that the pin does not freely disengage from the pin hole when there is no axial thrust, avoiding accidental pin falling out of the pin hole, which could cause column support failure and safety accidents, and increasing the safety of the pin connection. In other embodiments, the positioning ball and the positioning groove can be interchanged.

[0067] See Figure 4 The inner wall of the sliding hole 121 is provided with a sliding plate 122, which guides the column 160, ensuring that the column can slide and extend freely within the sliding hole. Furthermore, relying on the sliding guiding effect of the sliding plate, the gap between the column and the sliding hole can be minimized, reducing the swaying of the column within the sliding hole and ensuring the proper working posture of the column.

[0068] In the illustrated structure, the first link 130 and the second link 140 are both coaxially configured. This ensures the structural and stress stability of the hydraulic outrigger, increases its resistance to deformation, and reduces its weight while maintaining its support capacity.

[0069] The aforementioned hydraulic outriggers 100 are used to support the lifting work platform, that is, the lifting work platform is equipped with these hydraulic outriggers. Specifically, the hydraulic outriggers 100 are installed at at least the four corners of the base frame 200 of the lifting work platform to provide reliable support for the lifting work platform.

[0070] In the illustrated structure, the hydraulic outrigger 100 is rotatably mounted on the base frame 200 via a support 110 about the vertical axis z. This allows the hydraulic outrigger to be rotated about the vertical axis as needed to adjust its position on the support surface. Specifically, a bushing can be provided on the base frame, and an upper shaft section 111 and a lower shaft section 112, coaxial with the vertical axis z, can be provided on the support. The upper shaft section is inserted into the bushing from the upper end, and the lower shaft section is inserted into the bushing from the lower end.

[0071] In the illustrated structure, the first hinge point A is closer to the base frame than the second hinge point B, and the fourth hinge point D is closer to the third hinge point C. This is reflected in the lateral distance L, allowing the first and second links to rotate upwards with the sliding sleeve and column to retract the hydraulic outriggers. Accordingly, in the hydraulic outriggers... Figure 11-12 When in the retracted state, it facilitates bringing the first link 130 and the second link 140 together, reducing the space occupied. One end of the hydraulic cylinder 150 is connected to the first pin at the first hinge position A. To increase strength, the portion of the first pin connecting the hydraulic cylinder is supported by a support base. Furthermore, the distance between the first hinge position and the second hinge position is determined by the dimensions in the extended state, the retracted state, and the working pressure of the hydraulic system. In other embodiments, the hydraulic cylinder may not be coaxially mounted with the first pin; this is determined by the cylinder parameters and working position.

[0072] As described above, the hydraulic outriggers and lifting work platform, the hydraulic outrigger 100 can be used as follows: Figure 11-12 The image shows a collapsed state, which is equivalent to... Figure 1-3 , Figure 8-10 The unfolded state shown is achieved by flipping the first link 130 and the second link 140 upwards. Given the hydraulic cylinder structure shown, this is achieved by shortening the hydraulic cylinder through retraction. Conversely, Figure 1-3 , Figure 8-10 The unfolded state shown is from Figure 11-12 The retracted state shown is achieved by flipping the first link 130 and the second link 140 downwards. The hydraulic cylinder in the illustrated structure achieves this by extending and lengthening the hydraulic cylinder.

[0073] Specifically, it needs to be from Figure 11-12When the hydraulic outriggers are extended to support the lifting platform in the retracted state, the extension of the hydraulic cylinder 150 causes the parallelograms of each hydraulic outrigger to deform synchronously. The first connecting rod 130 and the second connecting rod 140 swing downwards, causing the sliding sleeve 120 and the column 160 to swing downwards as well, extending the hydraulic outriggers until the connecting rods of each hydraulic outrigger are nearly horizontal, and the parallelogram mechanisms of each hydraulic outrigger maintain a consistent posture. Since the column 160 is upright and can slide vertically through the sliding hole 121 of the sliding sleeve 120, the column 160 of each hydraulic outrigger slides down relative to the sliding sleeve to its respective supporting surface. When the supporting surface is uneven, the columns of each hydraulic outrigger are located at different heights on the supporting surface. Figure 10 The height difference H is used to represent this. Then, following the principle of proximity, the pin 170 is inserted into the pin hole 162 located below the sliding sleeve 120. The parallelogram continues to deform via the hydraulic cylinder, causing each column 160 to support the support surface downwards and bear the reaction force from the support surface. This force is transmitted to the sliding sleeve through the pins on the columns, supporting the lifting platform. Therefore, this hydraulic outrigger is suitable for both flat and uneven support surfaces. Furthermore, during deployment and leveling, it is not necessary to level each hydraulic outrigger individually; instead, all hydraulic outriggers operate simultaneously, making the leveling operation simple and convenient. This allows for rapid extension and retraction, improving work efficiency and the stability and safety of the support.

[0074] The hydraulic outrigger extends and retracts using a parallelogram mechanism, taking up little space.

Claims

1. Hydraulic outrigger suitable for quick levelling on uneven support surface, characterised in that The hydraulic outrigger (100) comprises: a support (110) having a first hinge site (A) and a second hinge site (B) disposed thereon; a sliding sleeve (120) having a vertical sliding hole (121) with a third hinge site (C) and a fourth hinge site (D) disposed thereon; a first connecting rod (130) and a second connecting rod (140) arranged in parallel, the first connecting rod being connected between the first hinge site and the fourth hinge site, and the second connecting rod being connected between the second hinge site and the third hinge site, the first hinge site, the second hinge site, the third hinge site and the fourth hinge site being located at four vertices of a parallelogram (ABCD); the support (110), the sliding sleeve (120), the first connecting rod (130) and the second connecting rod (140) forming a parallelogram mechanism for swinging and lifting the sliding sleeve (120) relative to the support (110) and extending and retracting the hydraulic outrigger; a hydraulic cylinder (150) acting on the parallelogram mechanism to deform the parallelogram and fix the sliding sleeve at a desired position; a vertical column (160) vertically and slidably penetrating the sliding hole (121) of the sliding sleeve (120) and being limited in the sliding hole, a plurality of pin holes (162) capable of being located below the sliding sleeve being distributed on the vertical column in the up-down direction; a pin (170) for being inserted into the pin hole (162) located below the sliding sleeve (120) and bearing the sliding sleeve.

2. Hydraulic outrigger suitable for quick levelling on uneven support surface according to claim 1, characterized in that: The vertical column (160) is provided with a limiting edge (164) located above the sliding sleeve, the limiting edge (164) being blocked by the sliding sleeve (120) to limit the vertical column (160) from being pulled out of the sliding hole of the sliding sleeve downward.

3. Hydraulic outrigger suitable for quick levelling on uneven support surface according to claim 1 or 2, characterized in that: The vertical column (160) is provided with a plurality of transverse bushings (161), and the pin holes (162) are formed in the corresponding bushings (161) one by one.

4. Hydraulic outrigger adapted for quick levelling on uneven support surface according to claim 3, characterized in that: The bushings (161) and the pin (170) are separately provided with a positioning groove (163) and an elastically retractable positioning marble (171), and the positioning marble is located in the positioning groove to position the pin in the bushing.

5. Hydraulic outrigger adapted for quick levelling on uneven support surface according to claim 1, characterized in that: The inner wall of the sliding hole (121) is provided with a sliding plate (122), and the vertical column (160) is guided by the sliding plate (122).

6. Hydraulic outrigger adapted for quick levelling on uneven support surface according to claim 1, characterized in that: The hydraulic cylinder (150) is connected between the support (110) and the sliding sleeve (120).

7. Hydraulic outrigger adapted for quick levelling on uneven support surface according to claim 1, characterized in that: The first connecting rod (130) and the second connecting rod (140) are coaxially arranged.

8. A mobile elevating work platform characterised by: The hydraulic outrigger (100) is configured according to any one of claims 1-7.

9. The aerial work platform of claim 8, characterized by: The hydraulic outrigger (100) is rotatably assembled on the chassis (200) around a vertical axis (z) through the support (110).

10. The aerial work platform of claim 8, characterized by: The first hinge site (A) is closer to the chassis than the second hinge site (B), and the fourth hinge site (D) is closer to the chassis than the third hinge site (C), so that the first connecting rod and the second connecting rod can turn upward with the sliding sleeve and the vertical column to retract the hydraulic outrigger.

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