Mobile fork lift truck

Abstract

The application discloses a movable supporting leg and a forklift truck, and relates to the technical field of forklift trucks.The movable supporting leg comprises a supporting leg main body, a supporting leg base plate and a universal connecting assembly.The supporting leg main body is used for being hingedly connected to a vehicle body of the forklift truck.The supporting leg base plate is connected to the supporting leg main body, and is provided with a supporting surface used for realizing surface contact with the ground.The universal connecting assembly is connected to the supporting leg main body and the supporting leg base plate, and is used for enabling the supporting leg base plate to rotate relative to the supporting leg main body around at least two different axes, so as to adapt the supporting surface to different terrains of the ground.The movable supporting leg solves the problem that the bottom surface of the movable supporting leg base plate cannot be completely matched with the ground, prolongs the service life of the structural member, and guarantees the safety and stability of the forklift truck operation.

Description

Technical Field

[0001] This application relates to the field of forklift technology, and in particular to a movable outrigger and a forklift. Background Technology

[0002] A forklift, also known as a telescopic boom forklift, is a machine equipped with forks for loading goods and a telescopic boom structure that allows the forks to extend and retract and move up and down. It is capable of motorized loading, unloading, and transportation.

[0003] In existing systems, to improve the operational stability of heavy-duty forklifts, movable outriggers are typically designed at the front of the forklift chassis. When the forklift is performing heavy-load operations, these outriggers can be deployed to enhance stability and prevent tipping. Currently, when the outriggers are deployed, the forklift operates in a front-high, rear-low posture. The bottom surface of the movable outrigger pad cannot fully contact the ground, resulting in a line contact. This can easily cause stress concentration in structural components, leading to a reduction in component lifespan and affecting operational safety and stability. Utility Model Content

[0004] The purpose of this application is to provide a movable outrigger and a forklift that solves the problem that the bottom surface of the movable outrigger pad cannot fully fit the ground.

[0005] To achieve the above objectives, this application provides a movable outrigger for a forklift, comprising:

[0006] The outrigger body is used to hinge onto the body of the forklift truck;

[0007] Outrigger pads are connected to the outrigger body. The outrigger pads have a support surface for making surface contact with the ground.

[0008] The universal joint assembly connects to the outrigger body and the outrigger pad, enabling the outrigger pad to rotate relative to the outrigger body about at least two different axes, so as to adapt the support surface to different terrains.

[0009] In some embodiments, the universal joint component includes:

[0010] A first shaft extends along a first direction, and a leg pad is rotatably connected to both ends of the first shaft along the axial direction.

[0011] Two second shafts are fixed to both sides of the first shaft and extend along a second direction perpendicular to the first direction, for rotatable connection to the leg body.

[0012] In some embodiments, the first shaft has fixing holes and positioning grooves on both sides, the fixing holes are located in the center of the positioning grooves, the second shaft has a fixing head and a positioning post, the positioning post is positioned and engaged with the positioning grooves, and the fixing head is fixed in the fixing holes so that the second shaft is fixed to the first shaft.

[0013] In some embodiments, both sides of the first shaft are further machined with a first positioning end face, the first positioning end face and the corresponding positioning groove form a positioning step, and the second shaft is further provided with a second positioning end face, the second positioning end face and the first positioning end face are in contact and abut against each other.

[0014] In some embodiments, the positioning post is provided with a guide surface, which is set at a preset angle with the end face of the positioning post to guide the positioning post when it is embedded in the positioning groove.

[0015] In some embodiments, the fixing hole is a threaded hole, the fixing head is a threaded head, and the fixing head is threadedly connected to the fixing hole.

[0016] In some embodiments, the outrigger pad includes a pad body, with warped portions at both ends along a second direction, and a support surface formed between the two warped portions.

[0017] In some embodiments, the outrigger pad further includes two connecting plates, which are disposed opposite to each other on the pad body to form a receiving cavity for accommodating the universal connection assembly. Both connecting plates are provided with a first rotating connection hole, and the two ends of the first shaft along the axial direction are respectively rotatably engaged with the two first rotating connection holes.

[0018] In some embodiments, the outrigger body includes:

[0019] Two upright plates, each with a first hinge hole at the end away from the outrigger pad, and a second hinge hole and a second rotatable connection hole at the end of each upright plate near the outrigger pad. The two first hinge holes are used to hinge with the first pin, the two second hinge holes are used to hinge with the second pin, and the two second shafts are rotatably engaged with the two second rotatable connection holes.

[0020] A horizontal board that connects two vertical boards.

[0021] This application also provides a forklift, including a vehicle body and outrigger cylinders, and further including movable outriggers as described above, wherein the movable outriggers are hinged to the vehicle body, and one end of the outrigger cylinders is hinged to the vehicle body and the other end is hinged to the movable outriggers.

[0022] Compared to the aforementioned background technology, the movable outrigger provided in this application embodiment is used in a forklift and includes an outrigger body, an outrigger pad, and a universal joint assembly. The outrigger body is hinged to the forklift body, the outrigger pad is connected to the outrigger body, and the outrigger pad has a support surface for surface contact with the ground. The universal joint assembly is connected to the outrigger body and the outrigger pad, and allows the outrigger pad to rotate relative to the outrigger body around at least two axes in different directions, thus adapting the support surface to different terrains.

[0023] The advantages of this design for the movable outriggers mainly include: The outrigger pads are connected to the outrigger body and outrigger base via universal joints, allowing the outrigger bases to rotate relative to the outrigger body around at least two different axes. For example, the outrigger bases can rotate relative to the outrigger body around axes that can rotate laterally and longitudinally. This rotation adjustment method enables the outrigger bases to adaptively level with the ground terrain, achieving surface-to-surface contact between the movable outriggers and the ground. Compared to traditional line contact, this provides more stable and reliable support, solves the problem of the bottom surface of the movable outrigger bases not being able to fully adhere to the ground, improves the service life of structural components, and ensures the safety and stability of forklift operations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the forklift's driving posture provided in this application;

[0026] Figure 2 A schematic diagram of the working posture of the forklift provided in this application with its movable outriggers extended for support;

[0027] Figure 3 A schematic diagram showing the contact between the outrigger pad and the ground of the movable outrigger provided in this application;

[0028] Figure 4 Exploded view of the movable outrigger provided in this application;

[0029] Figure 5 for Figure 4 An exploded view of the universal joint assembly in the movable outrigger shown.

[0030] in:

[0031] 1. Movable outriggers; 2. Vehicle body; 3. First pivot pin; 4. Outrigger cylinder; 5. Second pivot pin; 6. Ground;

[0032] 11. Outrigger body; 12. Outrigger pad; 13. Universal connection assembly;

[0033] 111. Vertical board; 112. Horizontal board;

[0034] 1111, First hinge hole; 1112, Second hinge hole; 1113, Second rotatable connection hole;

[0035] 121. Pad body; 122. Connecting plate;

[0036] 1211, Support surface; 1212, Warped portion;

[0037] 1221. First rotating connection hole;

[0038] 131. First axis; 132. Second axis;

[0039] 1311, Fixing hole; 1312, Positioning groove; 1313, First positioning end face;

[0040] 1321. Fixing head; 1322. Positioning pin; 1323. Second positioning end face;

[0041] 13221. Guide surface. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Please see Figure 1 , Figure 2 and Figure 3 The movable outrigger 1 provided in this application embodiment is used for a forklift and includes an outrigger body 11, an outrigger pad 12, and a universal connection assembly 13.

[0045] The outrigger body 11 serves as the main support component for the movable outrigger 1 and is hinged to the forklift body 2. The outrigger body 11 is extended and lowered by the outrigger cylinder 4, and the movable outrigger 1 is extended to the working posture of the forklift, so that the forklift is in a state of front-high and rear-low.

[0046] The outrigger pad 12 is connected to the outrigger body 11. The outrigger pad 12 is provided with a support surface 1211, which is used to achieve surface-to-surface contact with the ground 6. For example, the support surface 1211 can be a plane, which is used to contact and fit with the flat ground 6, thereby greatly increasing the contact area between the movable outrigger 1 and the ground 6.

[0047] Universal connector 13 is connected to the outrigger body 11 and the outrigger pad 12. Universal connector 13 is used to enable the outrigger pad 12 to rotate relative to the outrigger body 11 about at least two different axes, so that the support surface 1211 can adapt to different terrains 6.

[0048] In this way, the universal joint assembly 13 connects to the outrigger body 11 and the outrigger pad 12, allowing the outrigger pad 12 to rotate relative to the outrigger body 11 around at least two different axes. For example, the outrigger pad 12 can rotate relative to the outrigger body 11 around axes that can rotate in both the transverse and longitudinal directions. This rotation adjustment method enables the outrigger pad 12 to adaptively level the ground 6 terrain, thereby achieving surface-to-surface contact between the movable outrigger 1 and the ground 6. Compared with the traditional line contact state, the support is more stable and reliable, solving the problem that the bottom surface of the movable outrigger 1 pad cannot fully fit with the ground 6, improving the service life of structural components, and ensuring the safety and stability of forklift operation.

[0049] In some embodiments, the outrigger pad 12 rotates relative to the outrigger body 11 about an axis that can be rotated in both the lateral and longitudinal directions, thereby enabling the outrigger pad 12 to adaptively level the terrain of the ground 6.

[0050] Please see Figure 4 and Figure 5 The universal joint assembly 13 includes a first shaft 131 and two second shafts 132. The first shaft 131 extends along a first direction, and the outrigger pad 12 is rotatably connected to both ends of the first shaft 131 along the axial direction. The two second shafts 132 are respectively fixed to both sides of the first shaft 131 along the first direction and extend along a second direction perpendicular to the first direction. The two second shafts 132 are used for rotatably connecting to the outrigger body 11.

[0051] As can be seen, the cross universal joint structure formed by the first shaft 131 and two second shafts 132 enables the outrigger pad 12 to be rotatably connected to both ends of the first shaft 131 along the axial direction, and the two second shafts 132 to be rotatably connected to the outrigger body 11. This enables the outrigger pad 12 to rotate along the axial direction of the first shaft 131 (e.g., longitudinally), and the outrigger pad 12 and the universal joint assembly 13 to rotate along the axial direction of the second shaft 132 (e.g., laterally).

[0052] With the outriggers 1 set up in this way, when the outriggers 1 of the forklift are deployed, the outrigger pads 12 can adapt to various complex terrains, ensuring that the support surface 1211 (bottom surface) of the outrigger pads 12 is in full contact with the ground 6, increasing the stress area and reducing the risk of stress concentration and structural damage.

[0053] To facilitate the fixed connection between the second shaft 132 and the first shaft 131, the first shaft 131 is provided with fixing holes 1311 and positioning grooves 1312 on both sides. The fixing holes 1311 are located at the center of the positioning grooves 1312. Correspondingly, the second shaft 132 is provided with a fixing head 1321 and a positioning post 1322. The positioning post 1322 is positioned and engaged with the positioning grooves 1312. The fixing head 1321 is fixed in the fixing holes 1311 so that the second shaft 132 is fixed to the first shaft 131.

[0054] Furthermore, both sides of the first shaft 131 are machined with a first positioning end face 1313. Correspondingly, the second shaft 132 is also provided with a second positioning end face 1323, which contacts and abuts against the first positioning end face 1313.

[0055] It should be noted that on the first shaft 131, the first positioning end face 1313 and the corresponding positioning groove 1312 form a positioning step, and a corresponding shoulder structure is formed on the second shaft 132. The shoulder structure cooperates with the positioning step to facilitate the positioning cooperation between the second shaft 132 and the first shaft 131.

[0056] In other words, by setting a fixing hole 1311 and a positioning step structure on the first shaft 131, the positioning and connection reliability when the second shaft 132 is installed is guaranteed.

[0057] In addition, the positioning post 1322 is provided with a guide surface 13221, which is set at a preset angle with the end face of the positioning post 1322 to guide the positioning post 1322 when it is embedded in the positioning groove 1312, and at the same time avoid stress concentration of the positioning post 1322.

[0058] The guide surface 13221 can be a guide slope (or chamfer) surrounding the end face of the positioning post 1322. When the positioning post 1322 is installed into the positioning groove 1312, the guide slope helps the positioning post 1322 to be smoothly installed into the positioning groove 1312, and at the same time can avoid stress concentration in the positioning post 1322.

[0059] To facilitate connection of the second shaft 132, the fixing hole 1311 is a threaded hole, and the fixing head 1321 is a threaded head, with the fixing head 1321 threaded into the fixing hole 1311. In this way, both second shafts 132 can be screwed onto the first shaft 131 to form a fastened connection structure.

[0060] Of course, the installation and fastening methods of the second shaft 132 and the first shaft 131 are not limited to the above forms. They can also adopt mortise and tenon joints and bolt fastening structures.

[0061] In some embodiments, the connection between the outrigger body 11 and the outrigger pad 12 can also be achieved using a universal ball joint structure.

[0062] The universal ball joint structure enables the outrigger pad 12 to rotate in all directions relative to the outrigger body 11, allowing the outrigger pad 12 to adapt to various complex terrains and ensuring that the support surface 1211 (bottom surface) of the outrigger pad 12 is in full contact with the ground 6, increasing the stress area and reducing the risk of stress concentration and structural damage.

[0063] In some embodiments, the outrigger pad 12 includes a pad body 121, and both ends of the pad body 121 along the second direction are provided with warped portions 1212, and a support surface 1211 is formed between the two warped portions 1212.

[0064] The two warped portions 1212 are equivalent to having raised sections on both sides of the support surface 1211. These raised sections are inclined surfaces, and the inclined surfaces are set at an obtuse angle to the support surface 1211 (horizontal plane). This arrangement can prevent stress concentration or deformation at both ends of the outrigger pad 12 along the second direction, thus affecting its service life.

[0065] In some embodiments, the outrigger pad 12 further includes two connecting plates 122, which are disposed opposite to each other on the pad body 121 to form a receiving cavity for accommodating the universal connection assembly 13. The receiving cavity may be a C-shaped cavity. Both connecting plates 122 are provided with first rotating connection holes 1221, and the two ends of the first shaft 131 along the axial direction are respectively rotatably engaged with the two first rotating connection holes 1221.

[0066] In this way, the outrigger pad 12 can rotate along the axis of the first axis 131.

[0067] In some embodiments, the outrigger body 11 includes a horizontal plate 112 and two vertical plates 111, the horizontal plate 112 connecting the two vertical plates 111 to form a C-shaped cavity structure for accommodating the outrigger cylinder 4.

[0068] Each of the two upright plates 111 has a first hinge hole 1111 at the end away from the outrigger pad 12, and a second hinge hole 1112 and a second rotating connection hole 1113 at the end of each upright plate 111 near the outrigger pad 12. The second hinge hole 1112 and the second rotating connection hole 1113 are spaced apart. The two first hinge holes 1111 are used to hinge with the first pin 3 to realize the outrigger body 11 hinged to the vehicle body 2. The two second hinge holes 1112 are used to hinge with the second pin 5. The second pin 5 is connected to the telescopic rod of the outrigger cylinder 4. The two second shafts 132 are rotatably engaged with the two second rotating connection holes 1113 to realize the rotational movement of both the outrigger pad 12 and the universal connection assembly 13 along the axial direction of the second shaft 132.

[0069] The forklift provided in this application includes a vehicle body 2 and a support cylinder 4, and also includes a movable support leg 1 as described in the above specific embodiments. The movable support leg 1 is hinged to the vehicle body 2 by a first pin 3. One end of the support cylinder 4 is hinged to the vehicle body 2, and the other end is hinged to the support body 11 of the movable support leg 1 by a second pin 5.

[0070] In this way, the movable outrigger 1 is driven by the outrigger cylinder 4. Under the driving action of the outrigger cylinder 4, the movable outrigger 1 can rotate around the first pin 3. The movable outrigger 1 is extended to the working posture of the forklift, and the forklift is in a front-high and rear-low position. The support surface 1211 of the outrigger pad 12 is in contact with the ground 6. The outrigger pad 12 is adaptively leveled to the terrain of the ground 6 by the rotation adjustment of the universal joint assembly 13 in both longitudinal and lateral directions, thereby achieving surface-to-surface contact between the movable outrigger 1 and the ground 6, making the support more reliable.

[0071] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0072] The movable outriggers and forklift provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A movable outrigger for a forklift, characterized in that, include: The outrigger body is used to hinge onto the body of the forklift truck; A leg pad is connected to the leg body. The leg pad has a support surface for making surface contact with the ground. The universal joint assembly is connected to the outrigger body and the outrigger pad, and is used to enable the outrigger pad to rotate relative to the outrigger body about at least two axes in different directions, so as to make the support surface adapt to different terrains.

2. The movable outrigger as described in claim 1, characterized in that, The universal connection component includes: A first shaft extends along a first direction, and the outrigger pads are rotatably connected to both ends of the first shaft along the axial direction. Two second shafts are fixed to both sides of the first shaft and extend along a second direction perpendicular to the first direction, for rotatably connecting to the support leg body.

3. The movable outrigger as described in claim 2, characterized in that, The first shaft has fixing holes and positioning grooves machined on both sides. The fixing holes are located in the center of the positioning grooves. The second shaft has a fixing head and a positioning post. The positioning post is positioned and engaged with the positioning grooves. The fixing head is fixed in the fixing holes so that the second shaft is fixed to the first shaft.

4. The movable outrigger as described in claim 3, characterized in that, Both sides of the first shaft are also machined with a first positioning end face, and the first positioning end face and the corresponding positioning groove form a positioning step. The second shaft is also provided with a second positioning end face, and the second positioning end face contacts and abuts against the first positioning end face.

5. The movable outrigger as described in claim 3, characterized in that, The positioning post is provided with a guide surface, which is set at a preset angle with the end face of the positioning post to guide the positioning post when it is embedded in the positioning groove.

6. The movable outrigger as described in claim 3, characterized in that, The fixing hole is a threaded hole, the fixing head is a threaded head, and the fixing head is threadedly connected to the fixing hole.

7. The movable outrigger as described in any one of claims 2-6, characterized in that, The outrigger pad includes a pad body, and both ends of the pad body along the second direction are provided with warped portions, and the support surface is formed between the two warped portions.

8. The movable outrigger as described in claim 7, characterized in that, The outrigger pad also includes two connecting plates, which are disposed opposite to each other on the pad body to form a receiving cavity for accommodating the universal connection assembly. Each of the two connecting plates is provided with a first rotating connection hole, and the two ends of the first shaft along the axial direction are respectively rotatably engaged with the two first rotating connection holes.

9. The movable outrigger as described in claim 8, characterized in that, The support leg body includes: Two upright plates, each of the two upright plates having a first hinge hole at the end away from the support leg pad, and a second hinge hole and a second rotatable connection hole at the end of the two upright plates near the support leg pad. The two first hinge holes are used to hinge with a first pin, and the two second hinge holes are used to hinge with a second pin. The two second pins are rotatably engaged with the two second rotatable connection holes. A horizontal plate connects the two vertical plates.

10. A forklift, comprising a chassis and outrigger cylinders, characterized in that, It also includes a movable outrigger as described in any one of claims 1-9, wherein the movable outrigger is hinged to the vehicle body, one end of the outrigger cylinder is hinged to the vehicle body, and the other end is hinged to the movable outrigger.

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