Pin shaft protection device for forklift portal frame inclined oil cylinder

Abstract

The utility model discloses a pin shaft protection device for an inclined oil cylinder of a forklift portal frame, which comprises a pin shaft connected to one side of the forklift portal frame, an oil cup arranged at one end, far away from the forklift portal frame, of the pin shaft, and a clamping plate arranged on the periphery of one end, far away from the forklift portal frame, of the pin shaft, the periphery of the oil cup is provided with external threads, the oil cup is connected into the threaded hole in a threaded mode, the end face of the pin shaft is provided with a protection ring in a protruding mode, the distance between the top end of the protection ring and the end face of the pin shaft is larger than that between the top end of the oil cup and the end face of the pin shaft, the inner diameter of the protection ring is matched with the inner diameter of the threaded hole, and the clamping plate is fixed to the forklift portal through a fastener. By arranging the protection ring protruding out of the end face of the pin shaft, when the oil cup is installed on the pin shaft, the protection ring can completely cover the top of the oil cup, so that the oil cup is effectively prevented from being collided by the external environment in the working process, damage to the oil cup is avoided, normal work of a lubricating system is ensured, and stability and durability of equipment are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tilt cylinder component protection technology, specifically relating to a pin protection device for a forklift mast tilt cylinder. Background Technology

[0002] In mechanical transmission systems, especially on equipment requiring efficient and stable operation, such as forklift masts, the rational design of the lubrication system is crucial. Figure 1 As shown, the connecting pin 100 is a key component connecting the gantry and the tilting cylinder. Its stability and durability are directly related to the performance of the entire equipment. The connecting pin is fixed on the gantry, ensuring its accurate positioning and stable support during operation. The lubricating oil cup 200 undertakes the important task of providing necessary lubrication for the connecting pin and the tilting cylinder. The lubricating oil cup is fixed on the connecting pin, which allows the lubricating oil to be smoothly delivered to the parts that need lubrication, thereby effectively reducing friction and extending the service life of the components.

[0003] In existing technologies, the design of the connecting pin end face is often relatively simple, usually adopting a flat design. While this design meets basic installation and usage requirements to a certain extent, it poses a significant challenge to the fixing and protection of the lubricating oil cup. Because the lubricating oil cup protrudes from the connecting pin, it is highly susceptible to impacts from the external environment during operation, leading to damage. This not only affects the normal operation of the lubrication system but may also threaten the stable operation of the entire equipment. At the same time, the external lubricating oil cup in the traditional method has obvious shortcomings in sealing and dust prevention. In harsh working environments, dust, moisture, and other impurities can easily enter the lubrication system through the gap between the lubricating oil cup and the connecting pin, thereby contaminating the lubricating oil and reducing its lubrication performance. Over time, this will inevitably lead to accelerated wear of the connecting pin and the tilting cylinder, thus shortening the service life of the equipment. In summary, there is an urgent need for a connecting pin protection device for the tilting cylinder of a forklift mast. Utility Model Content

[0004] To address some or all of the technical problems existing in the prior art, this utility model provides a pin protection device for a forklift mast tilting cylinder. The pin protection device is disposed between the forklift mast and the tilting cylinder. The pin protection device for the forklift mast tilting cylinder includes a pin connected to one side of the forklift mast, an oil cup disposed at the end of the pin away from the forklift mast, and a retaining plate disposed on the outer periphery of the end of the pin away from the forklift mast, wherein:

[0005] One end of the pin has a threaded hole along the central axis, and the outer circumference of the oil cup has an external thread. The oil cup is threaded into the threaded hole. A protective ring is provided on the end face of the pin. The distance between the top of the protective ring and the end face of the pin is greater than the distance between the top of the oil cup and the end face of the pin. The inner diameter of the protective ring matches the inner diameter of the threaded hole. The clamping plate has a first fixing hole and a second fixing hole. The inner diameter of the first fixing hole matches the outer diameter of the protective ring. The first fixing hole is fitted onto the outer circumference of the protective ring. The clamping plate is fixed to the forklift mast by fasteners. The fasteners pass through the second fixing hole and the support plate provided on the forklift mast in sequence and are then tightened by nuts.

[0006] In one specific embodiment, in the above-mentioned pin protection device for the tilting cylinder of a forklift mast, the connection between the pin and the clamping plate is welding.

[0007] In one specific embodiment, in the above-mentioned pin protection device for the tilting cylinder of a forklift mast, the fastener is a fastening bolt.

[0008] In one specific embodiment, in the above-mentioned pin protection device for the tilting cylinder of a forklift mast, a washer is provided between the fastener and the clamping plate.

[0009] The pin protection device for the tilting cylinder of a forklift mast of this utility model has the following advantages and beneficial effects:

[0010] This device features a protective ring protruding from the end face of the pin. When the oil cup is installed on the pin, the protective ring completely covers the top of the oil cup, effectively preventing the oil cup from being damaged by external impacts during operation. This ensures the normal operation of the lubrication system, improves the stability and durability of the equipment, and allows for a threaded connection between the oil cup and the pin. This connection method ensures a tight fit between the oil cup and the pin, effectively preventing lubricating oil leakage. At the same time, the protective ring further prevents dust, moisture, and other impurities from entering the lubrication system through the gap between the oil cup and the pin, thus keeping the lubricating oil clean and improving its lubrication performance. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for further understanding of the embodiments of this utility model and constitute a part of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0012] Figure 1 This is a schematic diagram of the connecting pin structure in the prior art;

[0013] Figure 2 This is a diagram showing the usage status of the pin protection device for the tilting cylinder of a forklift mast according to this utility model;

[0014] Figure 3 yes Figure 2 A magnified view of part I;

[0015] Figure 4 This is a schematic diagram of the clamping plate in the pin protection device for the tilting cylinder of a forklift mast according to this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 1-Pin, 2-Oil cup, 3-Clamping plate, 4-Protective ring, 5-Fastener, 100-Connecting pin, 200-Lubricating oil cup, 300-Forklift mast. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] like Figures 1 to 4As shown, this utility model discloses a pin protection device for a forklift mast tilting cylinder. The pin protection device is disposed between the forklift mast 300 and the tilting cylinder (not shown in the figure). The device comprises a pin 1 connected to one side of the forklift mast 300, an oil cup 2 disposed at the end of the pin 1 away from the forklift mast 300, and a retaining plate 3 disposed on the outer periphery of the end of the pin 1 away from the forklift mast 300. A threaded hole is formed at one end of the pin 1 along its central axis, and an external thread is formed on the outer periphery of the oil cup 2. The oil cup 2 is threaded into the threaded hole. Through the threaded connection, the oil cup 2 can tightly fit onto the pin 1 to prevent lubricating oil leakage. The end face of the pin 1 is convex. A protective ring 4 is provided. The distance between the top of the protective ring 4 and the end face of the pin 1 is greater than the distance between the top of the oil cup 2 and the end face of the pin 1. The inner diameter of the protective ring 4 matches the inner diameter of the threaded hole. With this configuration, when the oil cup 2 is installed on the pin 1, the protective ring 4 can completely cover the top of the oil cup 2, thereby protecting the oil cup 2 from impact. The clamping plate 3 is provided with a first fixing hole 31 and a second fixing hole 32. The inner diameter of the first fixing hole 31 matches the outer diameter of the protective ring 4. The first fixing hole 31 is fitted around the outer circumference of the protective ring 4. The clamping plate 3 is fixed to the forklift mast 300 by fasteners 5. The fasteners 5 pass through the second fixing hole 32 and the support plate provided on the forklift mast 300 in sequence and are then tightened by nuts.

[0020] As one specific implementation, in the pin protection device for the tilting cylinder of a forklift mast of this utility model, the connection between the pin 1 and the clamping plate 3 is welding. By welding, the clamping plate 3 is firmly welded to the pin 1, which further enhances the stability and durability of the protection device. Of course, other fixed connection methods can also be used between the pin 1 and the clamping plate 3, as long as they achieve the fixing effect.

[0021] In one specific embodiment, in the pin protection device for the tilting cylinder of a forklift mast of this utility model, the fastener 5 is a fastening bolt. Of course, other fasteners such as fastening screws can also be used, as long as the fastening effect of the clamping plate 3 is met.

[0022] In one specific embodiment, in the pin protection device for the tilting cylinder of a forklift mast of this utility model, a washer is provided between the fastener 5 and the clamping plate 3. By providing the washer, the contact area between the fastener 5 and the clamping plate 3 can be increased, the uniform distribution of the fastening force can be improved, thereby preventing the fastener 5 from loosening during operation and improving the overall stability of the device.

[0023] The working principle of the pin protection device for the tilting cylinder of the forklift mast of this utility model is as follows: through the threaded connection, the oil cup 2 can be tightly attached to the pin 1, thereby ensuring the smooth delivery of lubricating oil and preventing leakage. The protective ring 4 can completely cover the top of the oil cup 2, thereby effectively preventing the oil cup 2 from being bumped by the external environment during operation.

[0024] In summary, compared with the prior art, the pin protection device for the tilting cylinder of a forklift mast of this utility model has the following advantages and beneficial effects:

[0025] This device features a protective ring 4 protruding from the end face of the pin 1. When the oil cup 2 is installed on the pin 1, the protective ring 4 completely covers the top of the oil cup 2, effectively preventing the oil cup 2 from being damaged by external impacts during operation. This ensures the normal operation of the lubrication system, improves the stability and durability of the equipment, and allows the oil cup 2 and the pin 1 to be connected by threads. This connection method can tightly fit the oil cup 2 and the pin 1, effectively preventing the leakage of lubricating oil. At the same time, the protective ring 4 further prevents dust, moisture, and other impurities from entering the lubrication system through the gap between the oil cup 2 and the pin 1, thereby keeping the lubricating oil clean and improving its lubrication performance.

[0026] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement state shown in the accompanying drawings.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pin shaft protection device for a tilt cylinder of a forklift mast, the pin shaft protection device being disposed between the forklift mast and the tilt cylinder, characterized in that, The pin shaft protection device for the tilt cylinder of the forklift mast comprises a pin shaft connected to one side of the forklift mast, an oil cup arranged at the end of the pin shaft away from the forklift mast, and a clamping plate arranged at the outer periphery of the end of the pin shaft away from the forklift mast. A threaded hole is arranged at one end of the pin shaft along the central axis, an external thread is arranged at the outer periphery of the oil cup, the oil cup is threadedly connected in the threaded hole, a protection ring is arranged on the end face of the pin shaft, the distance between the top end of the protection ring and the end face of the pin shaft is greater than the distance between the top end of the oil cup and the end face of the pin shaft, the inner diameter of the protection ring matches the inner diameter of the threaded hole, a first fixing hole and a second fixing hole are arranged on the clamping plate, the inner diameter of the first fixing hole matches the outer diameter of the protection ring, the first fixing hole is sleeved on the outer periphery of the protection ring, the clamping plate is fixed to the forklift mast by fasteners, and the fasteners are sequentially passed through the second fixing hole and a support plate arranged on the forklift mast and then fastened by nuts.

2. The pin shaft protection device for a fork truck mast tilt cylinder of claim 1, wherein, The pin shaft and the clamping plate are connected by welding.

3. The pin shaft protection device for a fork truck mast tilt cylinder of claim 1, wherein, The fasteners are fastening bolts.

4. The pin shaft protection device for a fork truck mast tilt cylinder of claim 1, wherein, A gasket is arranged between the fasteners and the clamping plate.

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