Lifting device and fork lift truck

Abstract

The utility model discloses a kind of lifting device and fork truck, lifting device includes portal, lifting frame, rolling mechanism and limiting mechanism, portal is provided with guide slot along vertical direction;Lifting frame is set to one side of portal;Rolling mechanism is rotatably connected on lifting frame, and rolling mechanism is rollingly connected with the inner side of guide slot;Limiting mechanism is fixedly connected to lifting frame, limiting mechanism is set in guide slot, and limiting mechanism and guide slot are connected with the relative two inner side clearance of horizontal direction. Fork truck applies the lifting device described above, can reduce the swing amplitude of lifting frame, reduce impact noise, improve the structural reliability of fork truck.

Description

Technical Field

[0001] This utility model relates to the field of material handling vehicle manufacturing technology, and in particular to a lifting device and a forklift. Background Technology

[0002] Forklifts, as a common industrial handling tool, are mainly used for loading, unloading, stacking, and short-distance transportation of palletized goods, and are key equipment in modern logistics and warehousing systems. The lifting mechanism of a traditional forklift typically includes multiple large guide wheels. These guide wheels are connected to the inner frame of the forklift's mast in a rolling manner to support and guide the lifting mechanism. When the lifting frame receives force from the forks, the large guide wheels located at the upper end of the lifting frame are subjected to a backward force from the mast, while the large guide wheels located at the lower end of the lifting frame are subjected to a forward force from the mast, thus balancing the forces on the lifting frame. However, due to manufacturing limitations, the dimensions of the large guide wheel and the inner frame of the mast cannot be perfectly matched. Generally, the diameter of the large guide wheel is about 3mm smaller than that of the inner frame of the mast. Therefore, when the forklift is unloaded, especially when it is traveling on uneven ground, the large guide wheel will wobble inside the inner frame of the mast due to the gap of about 3mm between it and the inner frame of the mast. This wobble and impact will generate noise. On the other hand, the wobbling of the lifting frame inside the inner frame of the mast will also affect the structural reliability of the forklift and shorten its service life. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a lifting device and a forklift, wherein the forklift utilizes a lifting device provided in this application. The lifting device can reduce the sway of the lifting frame, reduce impact noise, and improve the structural reliability of the forklift.

[0004] In a first aspect, a lifting device according to an embodiment of the present utility model includes: The gantry has guide grooves along the vertical direction; The hoisting frame is located on one side of the gantry. The rolling mechanism is rotatably connected to the lifting frame and is rolled to the inside of the guide groove; The limiting mechanism is fixedly connected to the lifting frame. The limiting mechanism is set in the guide groove, and the limiting mechanism and the guide groove are connected with clearance fit on the two opposite inner sides in the horizontal direction.

[0005] A lifting device according to an embodiment of the present utility model has at least the following beneficial effects: The rolling mechanism can roll vertically relative to the guide groove, enabling relative sliding between the lifting frame and the mast in the vertical direction, facilitating the lifting frame's ascent and descent. Compared to existing forklifts with a gap of approximately 3mm between the large guide wheels and the mast's inner frame, the limiting mechanism, with its horizontally aligned front and rear sides and the corresponding horizontally aligned inner sides of the guide groove, is connected with a gap of less than 1mm. This reduces the swaying amplitude of the lifting frame, rolling mechanism, and limiting mechanism relative to the mast. Even when the lifting frame sways relative to the mast, the limiting mechanism, fixedly connected to the lifting frame, and with a gap of less than 1mm between its horizontally aligned front and rear sides and the corresponding horizontally aligned inner sides of the guide groove, effectively mitigates the swaying amplitude of the lifting frame, rolling mechanism, and limiting mechanism relative to the mast, preventing excessive swaying. This reduces impact noise, improves the forklift's structural reliability, and extends its service life.

[0006] According to an embodiment of the present utility model, a lifting device includes a gantry comprising two opposing gantry posts, two guide grooves, each corresponding to one guide groove on the two gantry posts, and two limiting mechanisms, each corresponding to one of the two guide grooves.

[0007] According to an embodiment of the present utility model, a lifting device includes a limiting mechanism comprising a connecting plate, a first limiting component, and a second limiting component. The first limiting component and the second limiting component are respectively connected to the connecting plate, and the first limiting component and the second limiting component are respectively connected to the two opposite inner sides of the guide groove in a horizontal direction with clearance fit.

[0008] According to an embodiment of the present invention, a lifting device has a second limiting component located below a first limiting component, and the second limiting component is connected to the guide groove near the inner side of the lifting frame with a clearance fit.

[0009] According to an embodiment of the present invention, a lifting device includes a first limiting component comprising a first limiting block and a first threaded rod, the first limiting block being fixedly connected to one end of the first threaded rod; a second limiting component comprises a second limiting block and a second threaded rod, the second limiting block being fixedly connected to one end of the second threaded rod; the first threaded rod and the second threaded rod are respectively threadedly connected to a connecting plate.

[0010] According to an embodiment of the present invention, a lifting device includes a first limiting component that further includes a first limiting nut, which is threadedly connected to a first threaded rod; and a second limiting component that further includes a second limiting nut, which is threadedly connected to a second threaded rod.

[0011] According to an embodiment of the present utility model, a lifting device is provided with a driving head at the end of the first threaded rod away from the first limiting block, and the driving head can be driven by a sleeve or a wrench; a driving head is also provided at the end of the second threaded rod away from the second limiting block.

[0012] According to an embodiment of the present invention, a lifting device includes a rolling mechanism comprising multiple guide wheels, which are respectively disposed in two guide grooves.

[0013] According to an embodiment of the present utility model, a lifting device is provided in each guide groove, with at least two guide wheels corresponding to each guide groove. At least one guide wheel is provided above the limiting mechanism, and the guide wheel provided above the limiting mechanism can be matched and rolledly connected with the inner side of the guide groove on the side closer to the lifting frame. At least one guide wheel is provided below the limiting mechanism, and the guide wheel below the limiting mechanism can be matched and rolledly connected with the inner side of the guide groove on the side away from the lifting frame.

[0014] Secondly, a forklift according to an embodiment of the present invention utilizes the aforementioned lifting device.

[0015] Compared to existing forklifts with a 3mm gap between the large guide wheels and the mast inner frame, this design utilizes a limiting mechanism with a gap of less than 1mm between its horizontal front and rear sides and the corresponding inner sides of the guide groove. This reduces the swaying amplitude of the lifting frame, rolling mechanism, and limiting mechanism relative to the mast. Even when the forklift is unloaded and traveling on uneven ground, the less than 1mm gap between the limiting mechanism and the corresponding inner sides of the guide groove effectively mitigates the swaying amplitude of the lifting frame, rolling mechanism, and limiting mechanism relative to the mast, preventing excessive swaying. This reduces impact noise, improves the forklift's structural reliability, and extends its service life. The rolling mechanism can roll vertically relative to the guide groove, enabling vertical sliding between the lifting frame and the mast, facilitating the lifting and lowering of the lifting frame and improving the smoothness of forklift operation.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a forklift according to an embodiment of the present utility model; Figure 2 This is a rear view of a lifting device according to an embodiment of the present utility model; Figure 3 for Figure 2 Sectional view of section AA; Figure 4 This is an exploded view of the structure of a lifting device according to an embodiment of the present utility model; Figure 5This is a side view of the limiting mechanism of a lifting device according to an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures: Frame 100; Guide groove 110; Gate post 120; Top beam 130; Bottom beam 140; Lifting frame 200; Straight plate 210; Rolling mechanism 300; guide wheel 310; Limiting mechanism 400; connecting plate 410; first limiting component 420; first limiting block 421; first threaded rod 422; first limiting nut 423; second limiting component 430; second limiting block 431; second threaded rod 432; second limiting nut 433; driving head 440; Forklift 500; Oil pump assembly 600; Roller base 700. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments 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 embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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.

[0021] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 5This utility model provides a lifting device, including a gantry 100, a lifting frame 200, a rolling mechanism 300, and a limiting mechanism 400. The gantry 100 is provided with a guide groove 110 in the vertical direction. The lifting frame 200 is disposed on one side of the gantry 100. The rolling mechanism 300 is rotatably connected to the lifting frame 200 and is rotatably connected to the inner side of the guide groove 110. Specifically, the rolling mechanism 300 can rotate relative to the lifting frame 200.

[0024] The limiting mechanism 400 is fixedly connected to the lifting frame 200 and is disposed in the guide groove 110. The limiting mechanism 400 and the guide groove 110 are connected with a clearance fit on opposite inner sides in the horizontal direction. Specifically, the front and rear sides of the limiting mechanism 400 are connected with the opposite inner sides of the guide groove 110 with a clearance fit on opposite inner sides in the horizontal direction, and the clearance is less than 1mm.

[0025] The rolling mechanism 300 is rolled within the guide groove 110, allowing it to roll vertically relative to the guide groove 110. This enables relative sliding between the lifting frame 200 and the mast 100 in the vertical direction, facilitating the raising and lowering of the lifting frame 200. Compared to existing forklifts where there is approximately a 3mm gap between the large guide wheels and the inner frame of the mast 120, the limiting mechanism 400 is connected to the guide groove 110 via a gap fit between its front and rear sides in the horizontal direction and the two corresponding inner sides in the horizontal direction. This gap is less than 1mm, reducing the swaying amplitude of the lifting frame 200, rolling mechanism 300, and limiting mechanism 400 relative to the mast 100. Even when the lifting frame 200 sways relative to the mast 100, the limiting mechanism 400 is fixedly connected to the lifting frame 200, and the gap between the front and rear sides of the limiting mechanism 400 and the two inner sides of the guide groove 110 along the horizontal direction is less than 1mm. This can effectively reduce the swaying amplitude of the lifting frame 200, the rolling mechanism 300 and the limiting mechanism 400 relative to the mast 100, and prevent large swaying. This can reduce impact noise, improve the structural reliability of the forklift and extend its service life.

[0026] According to some embodiments of this application, refer to Figures 2 to 4 The gantry 100 includes two opposing gantry posts 120, two guide grooves 110, with each gantry 120 corresponding to one guide groove 110, and two limiting mechanisms 400, each corresponding to one of the two guide grooves 110. The one-to-one correspondence between the two limiting mechanisms 400 and the two guide grooves 110 improves the anti-sway effect of the hoisting frame 200.

[0027] Specifically, refer to Figures 2 to 4The gantry 100 also includes a top beam 130 and a bottom beam 140. The top beam 130 and the bottom beam 140 are both located between two gateposts 120. The two ends of the top beam 130 are connected to the upper part of the two gateposts 120 respectively, and the two ends of the bottom beam 140 are connected to the lower part of the two gateposts 120 respectively, forming a frame structure gantry 100.

[0028] Furthermore, referring to Figures 3 to 5 The limiting mechanism 400 includes a connecting plate 410, a first limiting component 420, and a second limiting component 430. The first limiting component 420 and the second limiting component 430 are respectively connected to the connecting plate 410, and are respectively connected to the guide groove 110 with a clearance fit on opposite inner sides in the horizontal direction. Specifically, the first limiting component 420 and the second limiting component 430 are respectively connected to the guide groove 110 with a clearance fit on opposite inner sides in the front-rear direction. The first limiting component 420 and the second limiting component 430 respectively limit movement on opposite sides in the front-rear direction of the limiting mechanism 400. Specifically, the connecting plate 410 is fixedly connected to the lifting frame 200.

[0029] It is understood that, in some other embodiments, reference is made to... Figure 4 The lifting frame 200 includes two straight plates 210, which are arranged opposite to each other. The connecting plates 410 of the two limiting mechanisms 400 are fixedly connected to the two straight plates 210 respectively.

[0030] Furthermore, referring to Figure 3 The second limiting component 430 is located below the first limiting component 420, and the second limiting component 430 is clearance-fitted with the inner side of the guide groove 110 near the lifting frame 200. Specifically, the first limiting component 420 is clearance-fitted with the inner side of the guide groove 110 away from the lifting frame 200. See also... Figures 3 to 5 When the lifting frame 200 tilts and sways upward relative to the gantry 100, the first limiting component 420 and the second limiting component 430 can limit the amplitude of the upward tilting and swaying of the lifting frame 200 relative to the gantry 100, thereby reducing the swaying stroke of the lifting frame 200. In the vertical direction, the first limiting component 420 and the second limiting component 430 are spaced apart and respectively connected to the front and rear inner sides of the guide groove 110 with clearance fit, simplifying the structure and volume of the limiting mechanism 400.

[0031] According to some embodiments of this application, refer to Figure 5The first limiting component 420 includes a first limiting block 421 and a first threaded rod 422, with the first limiting block 421 fixedly connected to one end of the first threaded rod 422. The second limiting component 430 includes a second limiting block 431 and a second threaded rod 432, with the second limiting block 431 fixedly connected to one end of the second threaded rod 432. The first threaded rod 422 and the second threaded rod 432 are respectively threadedly connected to the connecting plate 410. This facilitates adjustment of the distance between the first limiting block 421 and the second limiting block 431 relative to the connecting plate 410 to accommodate guide grooves 110 of different widths. Specifically, both the first limiting block 421 and the second limiting block 431 are made of high-strength plastic material, providing good limiting and support functions and minimizing collision noise.

[0032] Furthermore, referring to Figure 5 The first limiting component 420 further includes a first limiting nut 423, which is threadedly connected to the first threaded rod 422; the second limiting component 430 further includes a second limiting nut 433, which is threadedly connected to the second threaded rod 432. When the first limiting block 421 and the first threaded rod 422 are adjusted to their positions relative to the connecting plate 410, the first limiting nut 423 prevents the first threaded rod 422 from moving further relative to the connecting plate 410, thus achieving limiting. Similarly, the second limiting nut 433 can limit the second threaded rod 432.

[0033] Furthermore, referring to Figure 5 A drive head 440 is provided at the end of the first threaded rod 422 away from the first limiting block 421. The drive head 440 can be driven by a socket or a wrench. A drive head 440 is also provided at the end of the second threaded rod 432 away from the second limiting block 431. Specifically, the drive head 440 is an external hexagonal screw head, which is convenient to be turned with a socket or a wrench to rotate the first threaded rod 422 and the second threaded rod 432.

[0034] According to some embodiments of this application, refer to Figure 3 and Figure 4 The rolling mechanism 300 includes multiple guide wheels 310, which are respectively disposed in two guide grooves 110.

[0035] It is understood that, in some other embodiments, reference is made to... Figure 3 and Figure 4 Multiple guide wheels 310 are respectively set on two straight plates 210.

[0036] Furthermore, referring to Figure 3 and Figure 4Each guide groove 110 is provided with at least two guide wheels 310. At least one guide wheel 310 is located above the limiting mechanism 400, and the guide wheel 310 located above the limiting mechanism 400 is rollably connected to the inner side of the guide groove 110 near the lifting frame 200. At least one guide wheel 310 is located below the limiting mechanism 400, and the guide wheel 310 located below the limiting mechanism 400 is rollably connected to the inner side of the guide groove 110 away from the lifting frame 200. Specifically, at least one guide wheel 310 is located above the front of the limiting mechanism 400, and at least one guide wheel 310 is located below the rear of the limiting mechanism 400. When the lifting frame 200 carries the weight of the forks 500 and the goods, the lifting frame 200 will tend to flip downward relative to the mast 100. At this time, the guide wheels 310 and guide grooves 110 located above the front and below the rear of the limiting mechanism 400 cooperate to limit the lifting frame 200 and maintain the balance of the lifting frame 200.

[0037] This application also provides a forklift that utilizes a lifting device of this application, see reference. Figure 5 The system also includes forks 500, a hydraulic pump assembly 600, and a roller base 700. The forks 500 are fixedly connected to one side of the lifting frame 200. The hydraulic pump assembly 600 is driven by the lifting frame 200 and is used to drive the lifting frame 200 to rise or fall. The mast 100 and the hydraulic pump assembly 600 are respectively fixedly connected to the upper side of the roller base 700. Specifically, the hydraulic pump assembly 600 includes a swing arm, a cylinder body, a sprocket, and a chain. The swing arm is driven by the hydraulic pump and is used to operate the cylinder body. The upper end of the piston rod of the cylinder body is connected to the sprocket, which is driven by the chain. The chain is connected to the upper side of the lifting frame 200. By operating the cylinder body using the swing arm, the piston rod of the cylinder body can drive the sprocket to move up and down. During the up-and-down movement of the sprocket, the chain moves up and down, thereby driving the lifting frame 200 to rise or fall.

[0038] The rolling mechanism 300 can roll relative to the guide groove 110 in the vertical direction, thereby enabling relative sliding between the lifting frame 200 and the mast 100 in the vertical direction, facilitating the raising and lowering of the lifting frame 200. Compared to the existing forklifts where there is a gap of about 3mm between the large guide wheels and the inner frame of the mast 120, the limiting mechanism 400 is connected to the guide groove 110 with a gap of less than 1mm on its front and rear sides in the horizontal direction. This reduces the swaying amplitude of the lifting frame 200, the rolling mechanism 300, and the limiting mechanism 400 relative to the mast 100. Even when the forklift is unloaded and traveling on uneven ground, the gap between the front and rear sides of the limiting mechanism 400 and the two inner sides of the guide groove 110 along the horizontal direction is less than 1mm. This can effectively reduce the swaying amplitude of the lifting frame 200, the rolling mechanism 300 and the limiting mechanism 400 relative to the mast 100, and prevent large swaying. This can reduce impact noise, improve the structural reliability of the forklift and extend its service life.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lifting device, characterized in that, include: A gantry (100) is provided with a guide groove (110) in the vertical direction. A lifting frame (200) is disposed on one side of the gantry (100); A rolling mechanism (300) is rotatably connected to the lifting frame (200), and the rolling mechanism (300) is rollingly connected to the inner side of the guide groove (110); A limiting mechanism (400) is fixedly connected to the lifting frame (200). The limiting mechanism (400) is disposed in the guide groove (110). The limiting mechanism (400) and the guide groove (110) are connected with a clearance fit on their opposite inner sides in the horizontal direction.

2. The lifting device according to claim 1, characterized in that, The gantry (100) includes two gateposts (120) arranged opposite to each other. There are two guide grooves (110), and each of the two gateposts (120) is provided with one guide groove (110). There are two limiting mechanisms (400), and each of the two limiting mechanisms (400) is provided in one of the two guide grooves (110).

3. A lifting device according to claim 2, characterized in that, The limiting mechanism (400) includes a connecting plate (410), a first limiting component (420) and a second limiting component (430). The first limiting component (420) and the second limiting component (430) are respectively connected to the connecting plate (410). The first limiting component (420) and the second limiting component (430) are respectively connected to the guide groove (110) with clearance fit on opposite inner sides in the horizontal direction.

4. A lifting device according to claim 3, characterized in that, The second limiting component (430) is located below the first limiting component (420), and the second limiting component (430) is connected to the guide groove (110) near the inner side of the lifting frame (200) with a clearance fit.

5. A lifting device according to claim 3, characterized in that, The first limiting component (420) includes a first limiting block (421) and a first threaded rod (422), the first limiting block (421) being fixedly connected to one end of the first threaded rod (422); the second limiting component (430) includes a second limiting block (431) and a second threaded rod (432), the second limiting block (431) being fixedly connected to one end of the second threaded rod (432); the first threaded rod (422) and the second threaded rod (432) are respectively threadedly connected to the connecting plate (410).

6. A lifting device according to claim 5, characterized in that, The first limiting component (420) further includes a first limiting nut (423), which is threadedly connected to the first threaded rod (422); the second limiting component (430) further includes a second limiting nut (433), which is threadedly connected to the second threaded rod (432).

7. A lifting device according to claim 5, characterized in that, The first threaded rod (422) is provided with a drive head (440) at the end away from the first limiting block (421), and the drive head (440) can be driven by a sleeve or a wrench; the second threaded rod (432) is also provided with the drive head (440) at the end away from the second limiting block (431).

8. A lifting device according to claim 2, characterized in that, The rolling mechanism (300) includes a plurality of guide wheels (310), which are respectively disposed in two guide grooves (110).

9. A lifting device according to claim 8, characterized in that, At least two guide wheels (310) are provided in each guide groove (110). At least one guide wheel (310) is located above the limiting mechanism (400). The guide wheel (310) located above the limiting mechanism (400) is in a rolling connection with the inner side of the guide groove (110) near the lifting frame (200). At least one guide wheel (310) is located below the limiting mechanism (400). The guide wheel (310) located below the limiting mechanism (400) is in a rolling connection with the inner side of the guide groove (110) away from the lifting frame (200).

10. A forklift, characterized in that, Includes a lifting device as described in any one of claims 1 to 9.

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