Stacking machine, rear axle structure and counterweight method thereof

Abstract

The invention provides a stacking machine, a rear axle structure and a counterweight method of the rear axle structure. A rear axle; a counterweight assembly; an engine aftertreatment device; a filling opening is formed in the upper part of the shell; an auxiliary filling piece is arranged on the filling opening; during filling of the filler, the auxiliary filling part is used for disturbing the filler and feeding the filler into the shell; after filling of the filler is completed, the auxiliary filling piece is further used for guiding external air into the shell so that the filler can be rapidly air-dried. Through the design of the pourable filler, flexible adjustment of the weight of the shell balance weight of the rear axle structure is achieved, adjustment can be conducted according to the actual load requirement of the stacking machine, dependence on modular balance weights of various specifications is reduced, the production cost is reduced, and meanwhile the auxiliary pouring piece is arranged, so that the production efficiency is improved. The filling efficiency of the filler and the air drying speed of the filler are improved, and the time consumed during weight balancing of the rear axle structure is shortened.

Description

Technical Field

[0001] This invention belongs to the field of container lifting technology, specifically relating to a device for lifting containers, and more particularly to a stacker, a rear axle structure and its counterweight method. Background Technology

[0002] Currently, in port terminals and other operational scenarios, forklifts are crucial container handling equipment. To ensure the stability and safety of forklifts during lifting operations and to prevent them from tipping forward, counterweights are usually installed at the rear of the forklift.

[0003] In related technologies, counterweights are made of integrally cast counterweight blocks. According to the balance requirements of a specific forklift model, cast iron or concrete counterweight blocks of specific shapes and weights are cast using molds and then fixedly installed on the rear axle of the forklift. Once the counterweight blocks are shaped, their density and weight are fixed, which lacks flexibility. When the forklift needs to be adapted to different lifting loads or different attachments are added, the required counterweight will change. In order to meet different working conditions, it is necessary to prepare counterweight blocks of various specifications for replacement, which leads to an increase in the production cost of modular counterweight blocks.

[0004] Therefore, how to meet the counterweight requirements of forklifts of different specifications is a technical problem that urgently needs to be solved.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0006] This disclosure provides at least one forklift crane, a rear axle structure, and a counterweight method thereof.

[0007] In a first aspect, embodiments of this disclosure provide a rear axle structure, including:

[0008] Base body;

[0009] The rear axle is mounted on the base body;

[0010] A counterweight assembly is disposed on the base body and located above the rear axle;

[0011] An engine aftertreatment device is mounted on the base body;

[0012] The counterweight assembly includes a housing, and an exhaust pipe is provided inside the housing, the exhaust pipe being connected to the engine aftertreatment equipment;

[0013] The upper part of the shell is provided with an injection port;

[0014] An auxiliary injection component is provided on the injection port;

[0015] During filler injection, the auxiliary injection component is used to agitate and deliver the filler into the housing;

[0016] After the filler is filled, the auxiliary filling component is also used to introduce external gas into the housing to quickly dry the filler.

[0017] In one alternative embodiment,

[0018] The auxiliary injection component includes:

[0019] A rotating tube passes through the injection port and has a flow guide inside;

[0020] A connecting tube is connected to the injection port via a return spring, and the connecting tube is sleeved on the rotating tube and rotatably connected to the rotating tube;

[0021] The inner wall of the injection port is provided with a slider;

[0022] The outer wall of the rotating tube is provided with an arc-shaped groove that is adapted to the slider;

[0023] During the filling process, the connecting tube is pressed and the rotating tube is rotated by the cooperation of the slider and the arc-shaped groove, thereby rotating the guide to disturb the filling and accelerate its entry into the shell.

[0024] After the filler is filled, the rotating tube is rotated by pressing the connecting tube, thereby rotating the guide to introduce external gas into the shell and air dry the filler inside the shell.

[0025] In one optional embodiment, the end of the rotating tube protruding from the injection port is further provided with an annular groove;

[0026] The annular groove is connected to the arc-shaped sliding groove;

[0027] The injection port extends outwards with an external threaded ring;

[0028] The connecting pipe extends toward the injection port from the internal threaded ring that is adapted to the external threaded ring;

[0029] After the filler is filled, the connecting pipe is rotated by external force to make the inner threaded ring and the outer threaded ring threaded together, so as to fix the connecting pipe on the filling port.

[0030] In one optional embodiment, the number of the arc-shaped grooves is multiple, and the multiple arc-shaped grooves are spaced apart along the axial direction on the rotating tube;

[0031] The connecting tube has multiple sliders.

[0032] In one alternative embodiment, the flow guide includes:

[0033] A connecting rod, one end of which is connected to the inner wall of the rotating tube, and the other end of which extends out of the rotating tube;

[0034] A turbulence blade is disposed at the end of the connecting rod away from the rotating tube.

[0035] In one optional embodiment, the rotating tube is provided with a feed inlet;

[0036] A cover plate is rotatably mounted on the feed inlet;

[0037] The cover plate covers the feed inlet;

[0038] When it is necessary to fill the filler, the inlet is opened by rotating the cover plate with external force.

[0039] In one optional embodiment, the housing is provided with a plurality of partitions;

[0040] Multiple partitions divide the shell into multiple cavities, and adjacent cavities are connected by connecting ports.

[0041] In one alternative embodiment, the filler is a mixture of steel shot, yellow sand, and cement.

[0042] Secondly, embodiments of this disclosure also provide a forklift machine, comprising:

[0043] Forklift body;

[0044] The aforementioned rear axle structure is mounted on the forklift body.

[0045] Thirdly, this disclosure also provides a counterweight method applied to the rear axle structure as described above, the counterweight method comprising:

[0046] Connect the injection tube to the auxiliary injection component;

[0047] Inject filler into the injection tube;

[0048] The filler is agitated and then fed into the shell through an auxiliary injection component;

[0049] After filling is completed, external gas is introduced into the shell through the auxiliary injection component to quickly dry the filler.

[0050] The beneficial effects of this invention are that, through the design of injectable filler, the weight of the shell counterweight of the rear axle structure can be flexibly adjusted according to the actual load requirements of the forklift, reducing the dependence on modular counterweight blocks of various specifications and lowering production costs. At the same time, by setting auxiliary filling components, the filling efficiency and drying speed of the filler are improved, reducing the time consumed in counterweighting the rear axle structure.

[0051] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0052] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0053] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the rear axle structure provided in an embodiment of the present disclosure;

[0055] Figure 2 A cross-sectional view of a portion of the rear axle structure provided in an embodiment of this disclosure;

[0056] Figure 3 This is a schematic diagram of the structure of the infusion port and some auxiliary infusion components provided in an embodiment of this disclosure;

[0057] Figure 4 This is a partial structural schematic diagram of the auxiliary infusion assembly provided in an embodiment of the present disclosure;

[0058] Figure 5 A schematic diagram of the counterweight method for the rear axle structure provided in this embodiment of the disclosure.

[0059] In the diagram: 100, base body; 200, rear axle; 300, counterweight assembly; 310, housing; 311, partition plate; 320, exhaust pipe; 330, filling port; 331, slider; 332, external threaded ring; 340, auxiliary filling component; 341, rotating pipe; 3411, arc-shaped groove; 3412, annular groove; 3413, feed port; 3414, cover plate; 342, connecting pipe; 3421, internal threaded ring; 343, guide component; 3431, connecting rod; 3432, turbulence blade; 344, return spring; 400, engine aftertreatment equipment. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0062] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0063] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0064] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0065] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0066] Research has revealed that when counterweighting the rear axle of a forklift, integrally cast counterweight blocks are used. Based on the balance requirements of a specific forklift model, cast iron or concrete counterweight blocks of specific shapes and weights are cast using molds and then fixedly installed on the rear axle of the forklift. Once the counterweight blocks are shaped, their density and weight are fixed, lacking flexibility. When the forklift needs to adapt to different lifting loads or add different attachments, the required counterweight will change. In order to meet different working conditions, it is necessary to prepare counterweight blocks of various specifications for replacement, which leads to an increase in the production cost of modular counterweight blocks.

[0067] Based on the above research, this disclosure provides a forklift, a forklift rear axle structure, and a counterweight method thereof. Through the design of injectable filler, the weight of the counterweight of the shell 310 of the forklift rear axle structure is flexibly adjustable. It can be adjusted according to the actual load requirements of the forklift, reducing the dependence on modular counterweight blocks of various specifications and lowering production costs. At the same time, by setting an auxiliary filling component 340, the filling efficiency and drying speed of the filler are improved, reducing the time consumed in counterweighting the forklift rear axle 200 structure.

[0068] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0069] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0071] Please see Figure 1 and Figure 2 At least one embodiment provides a forklift rear axle 200 structure, including: a base body 100; a rear axle 200 disposed on the base body 100; a counterweight assembly 300 disposed on the base body 100 and located above the rear axle 200; and an engine after-treatment device 400 disposed on the base body 100. The counterweight assembly 300 includes a housing 310, and an exhaust pipe 320 is disposed within the housing 310, the exhaust pipe 320 communicating with the engine after-treatment device 400. A filling port 330 is provided at the upper part of the housing 310. An auxiliary filling component 340 is disposed on the filling port 330. During filling, the auxiliary filling component 340 is used to agitate and feed the filling material into the housing 310. After filling is complete, the auxiliary filling component 340 is also used to introduce external gas into the housing 310 to quickly dry the filling material.

[0072] The design of injectable filler material enables flexible adjustment of the counterweight weight of the shell 310 of the forklift rear axle 200 structure. It can be adjusted according to the actual load requirements of the forklift, reducing the reliance on modular counterweight blocks of various specifications and lowering production costs. At the same time, by setting up auxiliary filling components 340, the filling efficiency and air drying speed of the filler material are improved, reducing the time consumed in counterweighting the forklift rear axle 200 structure.

[0073] Please see Figure 2 and Figure 3The auxiliary infusion component 340 includes: a rotating tube 341 that passes through the infusion port 330 and has a guide member 343 inside; a connecting tube 342 that is connected to the infusion port 330 via a return spring 344, and the connecting tube 342 is sleeved on the rotating tube 341 and rotatably connected to the rotating tube 341; a slider 331 is provided on the inner wall of the infusion port 330; and an arc-shaped groove 3411 adapted to the slider 331 is provided on the outer wall of the rotating tube 341. During filling, pressing the connecting pipe 342 and cooperating with the slider 331 and the arc-shaped groove 3411 causes the rotating pipe 341 to rotate, thereby causing the guide 343 to rotate, which disturbs the filler and accelerates its entry into the housing 310. After the filler is filled, pressing the connecting pipe 342 causes the rotating pipe 341 to rotate, which in turn causes the guide 343 to rotate, thereby introducing external gas into the housing 310 to dry the filler inside the housing 310.

[0074] By pressing the connecting tube 342, the rotating tube 341 is driven to rotate, causing the guide element 343 to disturb the filler and accelerate the filling process; after filling, the same operation can be performed to introduce gas for air drying, which improves filling efficiency and air drying speed.

[0075] Please see Figure 2 and Figure 4 The rotating tube 341 has an annular groove 3412 at one end exposed from the filling port 330; the annular groove 3412 is connected to the arc-shaped sliding groove 3411; an external threaded ring 332 extends outward from the filling port 330; the connecting tube 342 extends toward the filling port 330 and an internal threaded ring 3421 adapted to the external threaded ring 332; after the filler is filled, the connecting tube 342 is rotated by external force to make the internal threaded ring 3421 and the external threaded ring 332 threadedly connected, so as to fix the connecting tube 342 on the filling port 330.

[0076] It should be noted that after the connecting pipe 342 is screwed to the corresponding position, the slider 331 of the filling port 330 slides into the annular groove 3412. When the forklift is traveling, the airflow enters the housing 310 through the auxiliary filling component 340 to dissipate heat from the exhaust pipe 320 inside the housing 310.

[0077] Please continue reading. Figure 2 and Figure 4 The number of arc-shaped sliding grooves 3411 is multiple, and the multiple arc-shaped sliding grooves 3411 are arranged axially at intervals on the rotating tube 341; the number of sliders 331 of the connecting tube 342 is multiple.

[0078] By setting multiple arc-shaped grooves 3411, the rotating tube 341 is kept stable during rotation, which improves the smoothness of the auxiliary pouring component 340 during use.

[0079] Specifically, the flow guide 343 includes: a connecting rod 3431, one end of which is connected to the inner wall of the rotating tube 341, and the other end of which extends out of the rotating tube 341; and a turbulence blade 3432, which is disposed at the end of the connecting rod 3431 away from the rotating tube 341.

[0080] The turbulence blades 3432 disperse the filler material to prevent blockage or bridging during the filling process, ensuring that the filler material flows evenly into the shell 310. At the same time, when the filler material is solidifying, pressing the connecting pipe 342 drives the turbulence blades 3432 to rotate, thereby accelerating the airflow into the shell 310.

[0081] Please see Figure 4 The rotating tube 341 is provided with a feed inlet 3413; a cover plate 3414 is rotatably disposed on the feed inlet 3413; the cover plate 3414 covers the feed inlet 3413; when it is necessary to inject filler, the cover plate 3414 is rotated by external force to open the feed inlet 3413.

[0082] The opening and closing of the feed inlet 3413 is controlled by the cover plate 3414. When the stacker is working, the feed inlet 3413 is opened to facilitate airflow into the housing 310 for heat dissipation. In extreme environments (such as humid environments), the feed inlet 3413 is closed to avoid affecting the filler.

[0083] Specifically, the filler is a mixture of steel shot, yellow sand, and cement. The density of the filler is adjusted by changing the weight of the steel shot, so that the weight of the cured filler meets the counterweight requirements, thus eliminating the need to design multiple counterweight blocks and improving the versatility of the counterweight assembly 300.

[0084] Please see Figure 2 The housing 310 is provided with a plurality of partitions 311; the plurality of partitions 311 divide the housing 310 into a plurality of cavities, and adjacent cavities are connected by a communication port.

[0085] The shell 310 is divided into multiple cavities by the partition 311, which improves the overall strength of the shell 310 and can meet the installation requirements of the forklift's cab.

[0086] At least one embodiment also provides a forklift, including: a forklift body; and a forklift rear axle 200 structure as described above, which is disposed on the forklift body.

[0087] The counterweight of the counterweight component 300 of the rear axle 200 structure of the forklift can be adjusted according to the actual load requirements of the forklift, reducing the reliance on modular counterweight blocks of various specifications and lowering production costs.

[0088] Please see Figure 5 This disclosure also provides a counterweight method for the stacker rear axle 200 structure as described above. Through the design of injectable filler, the weight of the shell 310 of the stacker rear axle 200 structure can be flexibly adjusted. It can be adjusted according to the actual load requirements of the stacker, reducing the dependence on modular counterweight blocks of various specifications and reducing production costs. At the same time, by setting the auxiliary filling component 340, the filling efficiency and air drying speed of the filler are improved, reducing the time consumed in counterweighting the stacker rear axle 200 structure.

[0089] Specifically, the counterweight method includes:

[0090] S110: Connect the injection tube to the auxiliary injection component;

[0091] S120: Inject filler into the injection tube;

[0092] S130: The filler is agitated and then fed into the housing 310 via the auxiliary filling component 340;

[0093] S140: After filling is completed, external gas is introduced into the housing 310 through the auxiliary injection component 340 to quickly dry the filler.

[0094] In summary, this invention provides a forklift, a rear axle structure, and a counterweight method thereof. The rear axle structure includes: a base body 100; a rear axle 200 disposed on the base body 100; a counterweight assembly 300 disposed on the base body 100 and located above the rear axle 200; and an engine after-treatment device 400 disposed on the base body 100. The counterweight assembly 300 includes a housing 310, and an exhaust pipe 320 is disposed within the housing 310, the exhaust pipe 320 being connected to the engine after-treatment device 400. A filling port 330 is provided at the upper part of the housing 310. An auxiliary filling component 340 is provided on the filling port 330. During filling, the auxiliary filling component 340 is used to agitate and feed the filling material into the housing 310. After filling is complete, the auxiliary filling component 340 is also used to introduce external gas into the housing 310 to quickly dry the filling material. The injectable filler design enables flexible adjustment of the counterweight weight of the rear axle structure housing 310, which can be adjusted according to the actual load requirements of the forklift, reducing reliance on modular counterweight blocks of various specifications and lowering production costs. At the same time, by setting up auxiliary filling components 340, the filling efficiency and drying speed of the filler are improved, reducing the time consumed in counterweighting the rear axle structure.

[0095] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0096] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0097] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0098] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0099] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A rear axle structure, characterized in that, include: Base body (100); The rear axle (200) is mounted on the base body (100); A counterweight assembly (300) is disposed on the base body (100) and located above the rear axle (200); An engine aftertreatment device (400) is mounted on the base body (100); The counterweight assembly (300) includes a housing (310), and an exhaust pipe (320) is provided inside the housing (310), which is connected to the engine aftertreatment device (400). The upper part of the shell (310) is provided with a filling port (330). An auxiliary injection component (340) is provided on the injection port (330); During filler filling, the auxiliary filling member (340) is used to agitate and deliver the filler into the housing (310); After the filler is filled, the auxiliary filling component (340) is also used to introduce external gas into the housing (310) to quickly dry the filler.

2. The rear axle structure as described in claim 1, characterized in that, The auxiliary injection component (340) includes: A rotating tube (341) passes through the injection port (330) and has a flow guide (343) inside. A connecting tube (342) is connected to the injection port (330) by a return spring (344), and the connecting tube (342) is sleeved on the rotating tube (341) and rotatably connected to the rotating tube (341); The inner wall of the injection port (330) is provided with a slider (331). The outer wall of the rotating tube (341) is provided with an arc-shaped groove (3411) that is adapted to the slider (331). During the filling process, by pressing the connecting tube (342) and through the cooperation of the slider (331) and the arc-shaped groove (3411), the rotating tube (341) is driven to rotate, thereby causing the guide (343) to rotate, so as to disturb the filling and accelerate the filling into the shell (310). After the filler is filled, the rotating tube (341) is rotated by pressing the connecting tube (342), thereby causing the guide (343) to rotate, so as to introduce external gas into the housing (310) and air dry the filler inside the housing (310).

3. The rear axle structure as described in claim 2, characterized in that, The rotating tube (341) is also provided with an annular groove (3412) at the end exposed from the injection port (330). The annular groove (3412) is connected to the arc-shaped sliding groove (3411); The injection port (330) extends outward to form an external threaded ring (332); The connecting tube (342) extends toward the injection port (330) from the internal threaded ring (3421) that is adapted to the external threaded ring (332). After the filler is filled, the connecting pipe (342) is rotated by external force to make the inner threaded ring (3421) and the outer threaded ring (332) threadedly connected, so as to fix the connecting pipe (342) on the filling port (330).

4. The rear axle structure as described in claim 3, characterized in that, The number of the arc-shaped grooves (3411) is multiple, and the multiple arc-shaped grooves (3411) are arranged axially at intervals on the rotating tube (341); The number of sliders (331) of the connecting tube (342) is multiple.

5. The rear axle structure as described in claim 2, characterized in that, The flow guide (343) includes: A connecting rod (3431) has one end connected to the inner wall of the rotating tube (341) and the other end extending out of the rotating tube (341); A turbulence blade (3432) is disposed at the end of the connecting rod (3431) away from the rotating tube (341).

6. The rear axle structure as described in claim 2, characterized in that, The rotating tube (341) is provided with a feed inlet (3413); A cover plate (3414) is rotatably mounted on the feed inlet (3413). The cover plate (3414) covers the feed inlet (3413); When it is necessary to fill the filler, the cover plate (3414) is rotated by external force to open the feed port (3413).

7. The rear axle structure as described in claim 1, characterized in that, The housing (310) is provided with a plurality of partitions (311); Multiple partitions (311) divide the housing (310) into multiple cavities, and adjacent cavities are connected by a communication port.

8. The rear axle structure as described in claim 1, characterized in that, The filler is a mixture of steel shot, yellow sand, and cement.

9. A forklift, characterized in that, include: Forklift body; The rear axle structure as described in any one of claims 1-8 is disposed on the forklift body.

10. A method for counterweighting applied to the rear axle structure as described in claim 1, characterized in that, The counterweight method includes: Connect the injection tube to the auxiliary injection component (340); Inject filler into the injection tube; The filler is agitated and then fed into the housing (310) through the auxiliary filling component (340); After filling is completed, external gas is introduced into the housing (310) through the auxiliary injection component (340) to quickly air dry the filler.

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