A low center of gravity telescopic boom forklift truck

Abstract

The utility model provides a low gravity telescopic arm forklift relates to telescopic arm forklift technical field, including frame, telescopic arm and telescoping oil cylinder. The frame is provided with connecting seat, and the telescopic arm and telescoping oil cylinder are respectively rotatably connected in the first hinged portion and the second hinged portion of connecting seat, and the connecting seat is below the second hinged portion and is provided with the avoidance mouth, based on the avoidance mouth, the second hinged portion can be set in as low as possible, and then the gravity center of the whole vehicle is reduced. In addition, the connecting seat is composed of two bridge type side plates and connecting plates arranged oppositely, the connecting plate is provided with a bending structure at the first hinged portion and the second hinged portion, the side plate is provided with a reinforcing plate and abuts against the frame, the bending and torsional resistance of the connecting seat is improved, the load transmitted by the oil cylinder and the telescopic arm can be dispersed to the frame through the connecting seat, so that the carrying capacity and the operation stability are improved while the gravity center of the whole vehicle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of telescopic boom forklift technology, and in particular to a telescopic boom forklift with a low center of gravity. Background Technology

[0002] A telescopic forklift is an engineering machinery device that integrates the functions of a forklift and a crane. Its basic structure includes a frame, a drive system, a telescopic boom, and a working mechanism. The telescopic boom is hinged to the frame and driven by a telescopic cylinder to achieve tilting motion, thereby driving the front forks or lifting devices to lift, move, and stack goods. During operation, the telescopic cylinder changes its length by extending and retracting to control the tilt angle of the telescopic boom. In conjunction with the extension and retraction of the telescopic boom body, it enables long-distance lifting and moving of goods.

[0003] During operation, both the telescopic boom and the telescopic cylinder must be reliably connected to the frame via hinges and bear significant alternating loads. The overall center of gravity height has a substantial impact on operational stability; a lower center of gravity results in greater safety when lifting heavy objects or extending the boom significantly. Due to the limited internal space of the frame, the complex component layout, and the large size and load-bearing capacity of the hinge components, achieving a reasonable layout within a limited space while balancing strength and stability is a crucial issue to consider in the design of telescopic boom forklifts. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the technical problem to be solved by this utility model is to propose a telescopic forklift with a low center of gravity, and the following technical solution is adopted:

[0005] A low-center-of-gravity telescopic forklift includes a frame, a telescopic boom, and a telescopic cylinder.

[0006] The frame is provided with a connecting seat, the telescopic arm is rotatably connected to the connecting seat through a first hinge, and the telescopic cylinder is rotatably connected to the connecting seat through a second hinge.

[0007] The aforementioned connecting seat has a clearance opening below the aforementioned second hinge portion, which is used to avoid the cylinder body when the aforementioned telescopic cylinder rotates.

[0008] As a further improvement, the connecting seat includes two side plates arranged opposite each other, the upper ends of the two side plates are laterally fixed by a connecting plate, and the lower ends are spaced apart to form the clearance openings.

[0009] As a further improvement, the connecting plate is provided with a first bending portion and a second bending portion, the first hinge portion is provided in the first bending portion, and the second hinge portion is provided in the second bending portion.

[0010] As a further improvement, the first bending portion is provided with a pair of ear plates, and the two ear plates are provided with connecting holes to form the first hinge portion.

[0011] As a further improvement, a crossbar is provided between the two side plates, and the crossbar has mounting holes, through which the connecting seat is detachably mounted to the frame.

[0012] As a further improvement, the aforementioned side plate, connecting plate, ear plate, and crossbar are integrally formed.

[0013] As a further improvement, a reinforcing groove is provided on the lower edge of the side plate, so that the longitudinal section of the side plate forms a bridge shape with a high middle section and low sides, and the middle section and the sides are connected by an arc transition.

[0014] As a further improvement, the second hinge portion is located in the middle section of the side plate, and the two crossbars are respectively located on both sides of the reinforcing groove.

[0015] As a further improvement, the aforementioned side plate is provided with a reinforcing plate, which is perpendicular to the aforementioned side plate.

[0016] As a further improvement, the aforementioned connecting plate and reinforcing plate abut against the aforementioned vehicle frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] Firstly, this utility model provides a connecting seat on the frame, allowing the telescopic arm to be rotatably connected to the connecting seat via a first hinge, and the telescopic cylinder to be rotatably connected to the connecting seat via a second hinge. An clearance opening is formed below the second hinge to provide rotation space for the hinge of the telescopic cylinder, allowing the second hinge to be positioned lower, thus lowering the center of gravity of the entire vehicle during load operation and improving the stability of the forklift during cargo lifting and load operation.

[0019] Secondly, in this utility model, the connecting seat is composed of two side plates and a connecting plate, with the lower end of the side plates open to form a clearance opening. The connecting plate is provided with a first bending part and a second bending part, and a first hinge part and a second hinge part are respectively arranged therein. The above-mentioned bending structure strengthens the bending stiffness and torsional strength of the hinge area. Preferably, the side plates, connecting plates, ear plates and crossbars are integrally formed to further strengthen the overall structural strength.

[0020] Thirdly, in this utility model, a reinforcing groove is provided on the lower edge of the side plate, so that the longitudinal section forms a bridge-shaped structure with a high middle section and low ends. The second hinge part is set in the middle section of the high position, which provides bending stiffness for the second hinge part. The two low positions are stably connected to the frame through crossbars. The load of the second hinge part is distributed through the arc transition and finally transferred to the frame by the crossbars. The force transmission is smooth. The reinforcing plate prevents the side plate from bending on the one hand, and forms a larger force-bearing surface with the frame on the other hand, which improves the overall load-bearing capacity and running stability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a partial structural diagram of the vehicle frame in this utility model;

[0024] Figure 3 This is a schematic diagram of the overall structure of the connector of this utility model;

[0025] Figure 4 This is a schematic diagram of the overall structure of the connector of this utility model from another perspective;

[0026] Figure 5 This is a side view of the connector of this utility model.

[0027] Figure label:

[0028] 1-Side plate; 2-Connecting plate; 3-Ear plate; 4-Crossbar;

[0029] 11-Reinforcing groove; 12-Reinforcing plate;

[0030] 21-First bend; 22-Second bend; 23-Openwork section;

[0031] 41 - Mounting hole;

[0032] 100 - Connecting seat; 200 - Frame; 300 - Telescopic arm; 400 - Telescopic cylinder;

[0033] 110 - First hinge part; 120 - Second hinge part; 130 - Clearance opening. Detailed Implementation

[0034] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0035] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. The terms "part," "side," "end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0036] like Figure 1 As shown, a low-center-of-gravity telescopic forklift includes a frame 200, a telescopic boom 300, and a telescopic cylinder 400. Figure 2 As shown, a connecting seat 100 is provided on the frame 200, the telescopic arm 300 is rotatably connected to the connecting seat 100 through the first hinge part 110, and the telescopic cylinder 400 is rotatably connected to the connecting seat 100 through the second hinge part 120.

[0037] In this embodiment, as Figure 4 As shown, the connecting seat 100 has a clearance opening 130 below the second hinge portion 120. The outline of the clearance opening 130 is designed according to the movement trajectory of the lower end of the telescopic cylinder 400, ensuring that its size and position cover the entire swing stroke of the telescopic cylinder 400 during operation. When the telescopic cylinder 400 tilts up or down, its lower section can smoothly enter the clearance opening 130, thus avoiding movement interference with the main structure of the connecting seat 100. Based on the clearance space provided by the clearance opening 130, the second hinge portion 120 can be positioned as low as possible, effectively reducing the installation height of the telescopic cylinder 400 and the connecting seat 100, thereby structurally lowering the center of gravity of the entire vehicle. This provides superior stability, especially during lifting and boom extension operations, reducing the risk of rollover.

[0038] like Figure 3 and Figure 4 As shown, in one specific embodiment, the connecting seat 100 includes two side plates 1 arranged parallel to each other. The upper ends of the two side plates 1 are laterally fixed by a connecting plate 2. Together, the three form a three-sided frame body with an opening facing downwards. The lower ends of the two side plates 1 are spaced apart to form the aforementioned clearance opening 130. This structure is easy to process and form through cutting and bending processes, the overall structure is stable, and the manufacturing process is simple.

[0039] like Figure 3As shown, the connecting plate 2 is provided with a first bent portion 21 and a second bent portion 22. A first hinge portion 110 is disposed within the first bent portion 21, and a second hinge portion 120 is correspondingly disposed within the second bent portion 22. In a specific embodiment, the horizontal connecting plate 2 is formed by stamping upwards in the middle to form the second bent portion 22. The second bent portion 22 and the horizontal portion of the connecting plate 2 form the first bent portion 21. Correspondingly, the upper edge contour of the side plate 1 is consistent with the longitudinal section contour of the connecting plate 2, that is, a triangular cavity is formed inside the second bent portion 22, and the second hinge portion 120 is disposed within this cavity. Preferably, the side plate 1 can be locally thickened at the hinge, or an annular pad layer can be provided around the hinge to enhance the structural strength of the hinge.

[0040] In one specific embodiment, a pair of ear plates 3 are integrally formed or welded onto the first bending portion 21. The two ear plates 3 are arranged in parallel and opposite directions, and have connecting holes opposite each other. During installation, the pin of the telescopic arm 300 passes through the pair of connecting holes, thereby achieving a reliable rotatable connection between the telescopic arm 300 and the connecting seat 100. It is worth noting that the connecting plate 2 has a hollow portion 23 at the position corresponding to the telescopic cylinder 400. The cylinder body of the telescopic cylinder 400 is rotatably connected between the two side plates 1, and its telescopic end can smoothly pass through the hollow portion 23 and connect to the telescopic arm 300. By controlling the extension or retraction of the piston rod of the telescopic cylinder 400, the telescopic arm 300 can be driven to rise or fall around the first hinge portion 110.

[0041] like Figure 3 and Figure 4 As shown, a crossbar 4 is provided between the two side plates 1, and mounting holes 41 are provided on the crossbar 4. Specifically, the crossbar 4 is located at the bottom of the two side plates 1, and the connecting seat 100 is detachably connected to the frame 200 by passing through the mounting holes 41 with high-strength bolts. This structure allows the mounting seat to be connected to the frame 200, and after long-term use, if the connecting seat 100 becomes worn or deformed, it can be easily removed from the frame 200 for replacement or repair, improving the maintainability of the equipment.

[0042] Preferably, the side plate 1, connecting plate 2, ear plate 3, and crossbar 4 are manufactured as a single piece using integral casting or one-time hot pressing of steel plates. This avoids the risks of weak weld strength and stress concentration that may occur with traditional multi-part welding, resulting in higher overall rigidity and consistency for the entire connecting seat 100. This embodiment not only ensures the machining and assembly accuracy of the holes in each hinge part and reduces abnormal wear during operation, but also simplifies the manufacturing process, ensuring that the connecting seat 100 maintains excellent stability and durability even under long-term alternating loads.

[0043] like Figure 5As shown, a reinforcing groove 11 is machined along the lower edge of the side plate 1. This reinforcing groove 11 creates a bridge-shaped structure in the longitudinal section of the side plate 1, with a raised middle section and lower sides. A large-radius arc transition is used to connect the middle section and the sides. This bridge-like structure enhances the bending stiffness and buckling resistance of the side plate 1 in the vertical direction. Correspondingly, the second hinge 120 is located in the middle section of the high position of the side plate 1, while the crossbars 4 are respectively arranged on the mounting bases on both sides of the reinforcing groove 11. This allows the huge load borne by the second hinge 120 to be smoothly transferred and distributed to the crossbars 4 on both sides along the arc transition area of ​​the reinforcing groove 11, and finally efficiently transferred to the frame 200, forming a reasonable force transmission structure.

[0044] like Figures 3-5 As shown, a reinforcing plate 12 is also vertically welded or riveted to the side plate 1 to enhance its structural strength. Furthermore, the reinforcing plate 12 and the aforementioned connecting plate 2 both abut against the frame 200, forming a joint load-bearing surface that abuts against the frame 200. This increases the contact area between the side plate 1 and the frame 200, improving the local load-bearing capacity and torsional resistance of the side plate 1. Consequently, the overall stability and safety of the machine under harsh conditions such as heavy loads and off-center loads are enhanced from the perspective of the connecting seat 100.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low-center-of-gravity telescopic boom forklift, comprising a frame (200), a telescopic boom (300), and a telescopic cylinder (400), characterized in that, The frame (200) is provided with a connecting seat (100), the telescopic arm (300) is rotatably connected to the connecting seat (100) through a first hinge (110), and the telescopic cylinder (400) is rotatably connected to the connecting seat (100) through a second hinge (120). The connecting seat (100) is provided with a clearance opening (130) below the second hinge portion (120), and the clearance opening (130) is used to avoid the cylinder body when the telescopic cylinder (400) rotates.

2. The low center of gravity telescopic forklift as described in claim 1, characterized in that, The connecting seat (100) includes two side plates (1) arranged opposite to each other. The upper ends of the two side plates (1) are laterally fixed by a connecting plate (2), and the lower ends are spaced apart to form the clearance opening (130).

3. A low-center-of-gravity telescopic forklift as described in claim 2, characterized in that, The connecting plate (2) is provided with a first bending portion (21) and a second bending portion (22), the first hinge portion (110) is provided in the first bending portion (21), and the second hinge portion (120) is provided in the second bending portion (22).

4. A low-center-of-gravity telescopic forklift as described in claim 3, characterized in that, The first bending portion (21) is provided with a pair of ear plates (3), and the two ear plates (3) are provided with connecting holes to form the first hinge portion (110).

5. A low-center-of-gravity telescopic forklift as described in claim 2, characterized in that, A crossbar (4) is provided between the two side plates (1), and a mounting hole (41) is provided on the crossbar (4). The connecting seat (100) is detachably mounted to the frame (200) through the mounting hole (41).

6. A low-center-of-gravity telescopic forklift as described in claim 5, characterized in that, The side plate (1), connecting plate (2), ear plate (3) and crossbar (4) are integrally formed structures.

7. A low-center-of-gravity telescopic forklift as described in claim 2, characterized in that, The lower edge of the side plate (1) is provided with a reinforcing groove (11), so that the longitudinal section of the side plate (1) forms a bridge shape with a high middle section and low sides, and the middle section and the sides are connected by an arc transition.

8. A low-center-of-gravity telescopic forklift as described in claim 7, characterized in that, The second hinge (120) is located in the middle section of the side plate (1), and the two crossbars (4) are respectively located on both sides of the reinforcing groove (11).

9. A low-center-of-gravity telescopic forklift as described in claim 2, characterized in that, The side plate (1) is provided with a reinforcing plate (12), which is perpendicular to the side plate (1).

10. A low-center-of-gravity telescopic forklift as described in claim 9, characterized in that, The connecting plate (2) and the reinforcing plate (12) abut against the frame (200).

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