Slide, telescopic arm, working machine and method for manufacturing slide

Abstract

The present application relates to the technical field of sliding block, and provides a sliding block, telescopic arm, working machine and manufacturing method of sliding block, the sliding block comprises a sliding block body, the sliding body is provided with a plurality of accommodating holes, and the contact surface of the sliding block body is coated with lubricating medium for contact with the grinding body.When the contact surface of the sliding block body is worn, the lubricating medium on the contact surface of the sliding block body enters the accommodating hole and is stored, which can play a real-time lubricating role in the subsequent relative movement of the grinding body and the sliding block; when the part of the accommodating hole of the sliding block body storing the lubricating medium is worn, the lubricating medium can be applied to the grinding body, the lubricating medium is brought into the surface of the sliding block body through the relative movement between the grinding body and the sliding block, and the lubricating medium is filled in the new accommodating hole, the lubricating medium in the accommodating hole lubricates the grinding body in the subsequent relative movement of the grinding body and the sliding block, the effect of secondary self-lubrication is realized, and the secondary lubrication does not need to disassemble the sliding block, so the maintenance cost is low.

Description

Technical Field

[0001] This invention relates to the field of slider technology, and more particularly to a slider, a telescopic arm, a working machine, and a method for manufacturing the slider. Background Technology

[0002] During use, sliders typically require lubrication of both the slider and the guide rail or grinding body. For example, sliders used between the telescopic booms of cranes prevent direct contact and friction between the metal booms. To reduce wear on the sliders, routine application of grease or lubricating oil is necessary. However, current lubrication methods often involve manually adding lubricating oil or grease, which is cumbersome, labor-intensive, and yields poor lubrication results.

[0003] Therefore, in order to simplify operation and reduce labor costs, existing technologies use lubricating oil grooves on the contact surface between the slider and the grinding body to achieve self-lubrication by adding lubricating oil. However, this self-lubrication effect is achieved by setting up a complex oil injection system, which is costly and has poor stability.

[0004] Alternatively, existing technologies employ a method of embedding a self-lubricating material with lubricating properties into the contact surface between the slider and the grinding body to achieve slider lubrication. However, after the self-lubricating material used as the insert wears out, the sliders need to be disassembled one by one, and the screws need to be manually turned to push out the inserts again. This operation is cumbersome and cannot guarantee that the height of the exposed inserts is completely consistent, resulting in poor self-lubrication effect of the slider. Summary of the Invention

[0005] This invention provides a slider, a telescopic arm, a working machine, and a method for manufacturing the slider, in order to solve the defects of existing methods for lubricating sliders, such as cumbersome operation, complex structure, high lubrication cost, and poor lubrication effect.

[0006] The present invention provides a slider, including a slider body, the slider body being provided with a plurality of receiving holes, and the contact surface of the slider body for contacting the grinding body being coated with a lubricating medium.

[0007] According to the present invention, the slider body is a foam body, and the foam pores of the foam body are the receiving pores.

[0008] According to a slider provided by the present invention, the slider body includes:

[0009] Solid part;

[0010] An outer foam layer, wherein the foam cells of the outer foam layer are the receiving pores;

[0011] The outer foam layer is wrapped around the solid portion, or the outer foam layer is disposed on the side of the solid portion close to the grinding body.

[0012] According to a slider provided by the present invention, the bubble pores are closed pores.

[0013] According to the present invention, the slider body is made of polymer material or modified polymer material.

[0014] According to a slider provided by the present invention, the solid part and the outer foam layer are made of the same material; or, the solid part is made of a fiber-reinforced material.

[0015] According to a slider provided by the present invention, the aperture of the receiving hole is 1-100 micrometers.

[0016] The present invention also provides a telescopic arm, comprising:

[0017] Fixed body;

[0018] Moving body;

[0019] A first slider is slidably connected to the fixed body and the movable body, and the first slider is a slider as described in any of the above.

[0020] The present invention also provides a working machine, including a slider as described in any one of the above claims or a telescopic arm as described in the above claims.

[0021] This invention also provides a method for manufacturing a slider, comprising:

[0022] The polymer material is foamed and molded to form the slider body;

[0023] A lubricating medium is applied to the contact surface of the slider body that is in contact with the grinding body to form a slider.

[0024] According to a method for manufacturing a slider provided by the present invention, the step of foaming and molding a polymer material to form a slider body includes:

[0025] Preparation of modified polymer materials;

[0026] The modified polymer material is subjected to foaming molding process.

[0027] According to a method for manufacturing a slider provided by the present invention, the preparation of the modified polymer material includes:

[0028] A polymer material with a low coefficient of friction and an antioxidant are added to the polymer material to form a mixed material;

[0029] The mixture is heated and extruded into granules using an extruder.

[0030] The present invention provides a slider, a telescopic arm, a working machine, and a method for manufacturing a slider. The slider includes a slider body, which is provided with multiple receiving holes. The contact surface of the slider body for contacting the grinding body is coated with a lubricating medium.

[0031] When the contact surface of the slider body is worn, the lubricating medium on the contact surface enters the receiving hole and is stored. During subsequent relative movement between the grinding body and the slider, it provides real-time lubrication, thereby reducing friction. Furthermore, when the portion of the slider body containing the lubricating medium in the receiving hole is worn, lubricating medium can be applied to the grinding body. The relative movement between the grinding body and the slider carries the lubricating medium onto the surface of the slider body, filling the new receiving hole. During subsequent relative movement between the two grinding bodies, the lubricating medium in the receiving hole can lubricate the grinding body, thus providing real-time lubrication and achieving a secondary self-lubricating effect. This effectively reduces friction between the slider and the grinding body; moreover, secondary lubrication does not require disassembling the slider, resulting in low maintenance costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in this invention 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 described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is one of the cross-sectional views of the slider body provided by the present invention;

[0034] Figure 2 This is a second cross-sectional view of the slider body provided by the present invention;

[0035] Figure 3 This is the third sectional view of the slider body provided by the present invention;

[0036] Figure 4 This is a perspective view of the slider body provided by the present invention;

[0037] Figure 5 This is a schematic flowchart of the method for preparing the slider provided by the present invention.

[0038] Figure label:

[0039] 1. Slider body; 11. Solid part; 12. Outer foam layer. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0041] The following is combined with Figures 1 to 5 This invention describes the slider, telescopic arm, working machinery, and method for manufacturing the slider.

[0042] like Figure 1 As shown, the present invention provides a slider, including a slider body 1, the slider body 1 is provided with a plurality of receiving holes, and the contact surface of the slider body 1 for contacting the grinding body is coated with a lubricating medium.

[0043] In this way, when the contact surface of the slider body 1 is worn, the lubricating medium on the contact surface of the slider body 1 enters into the receiving hole and is stored. During the subsequent relative movement of the grinding body and the slider, it can play a role in lubricating the grinding body in real time, thereby reducing friction.

[0044] Furthermore, when the portion of the slider body 1 containing the lubricating medium is worn, the lubricating medium can be applied to the grinding body. Through the relative movement between the grinding body and the slider, the lubricating medium is carried into the surface of the slider body 1 and fills the new accommodating hole (i.e., the accommodating hole inside the worn accommodating hole). Thus, during the subsequent relative movement between the slider and the grinding body, the lubricating medium in the accommodating hole can lubricate the grinding body, thereby enabling the slider to play a real-time lubrication role and achieve a secondary self-lubricating effect. This effectively reduces the friction between the slider and the grinding body, and secondary lubrication does not require disassembling the slider, resulting in low maintenance costs.

[0045] With this design, the slider can achieve self-lubrication through multiple receiving holes and external lubrication medium, thus avoiding frequent and complex maintenance operations.

[0046] In an optional embodiment, the lubricating medium may be grease or lubricating oil, and here, the lubricating medium may be semi-solid grease.

[0047] In optional embodiments of the present invention, such as Figure 1 As shown, the slider body 1 can be a foam body, and the foam cells can be accommodating holes. In this way, the slider body 1 can have a large number of accommodating holes, and when the surface of the slider body 1 is worn, the lubricating medium can easily enter into the accommodating holes for storage, which is beneficial to achieving lubrication without dead corners.

[0048] In an optional embodiment of the present invention, the foam body can have closed-cell pores. In this way, the pores are not interconnected. During the relative sliding of the grinding body and the slider, when the slider body 1 is subjected to the squeezing action of the grinding body, the lubricating medium within each pore (i.e., the receiving hole) will not flow between the pores, effectively preventing lubricating medium leakage. Through the relative movement of the slider and the grinding body, the lubricating medium can be spread on the slider body 1, forming an effective lubrication layer, which is beneficial to improving the lubrication effect of the slider.

[0049] In a first alternative embodiment of the invention, such as Figure 1 As shown, the entire slider body 1 is a foamed structure to increase the number of accommodating holes, thereby improving the lubrication effect of the slider.

[0050] In a second alternative embodiment of the invention, such as Figure 2 and Figure 3 As shown, the slider body 1 may include a solid part 11 and an outer foam layer 12, and the foam pores of the outer foam layer 12 may be accommodating pores.

[0051] In one of the methods, such as Figure 2 As shown, the outer foam layer 12 can wrap around the solid part 11. This increases the strength of the slider body 1 and ensures that there are no dead corners in the lubrication of the slider, which is beneficial to improving the lubrication effect.

[0052] In another way, such as Figure 3 As shown, the outer foam layer 12 can be disposed on the side of the solid portion 11 close to the grinding body, so that the outer foam layer 12 serves as the friction contact surface of the slider body 1. In this way, the strength of the slider body 1 can be increased, and the slider body 1 can also be guaranteed to have a lubricating effect.

[0053] In an optional embodiment, the solid portion 11 and the outer foam layer 12 can be made of the same material. Specifically, both the solid portion and the outer foam layer 12 can be made of polymer materials.

[0054] Alternatively, the solid part 11 can be made of fiber-reinforced material, and the outer foam layer 12 can be made of foamed polymer material. This can further improve the strength of the slider body 1.

[0055] In an optional embodiment, the thickness of the outer foam layer 12 can be half the thickness of the solid portion. This ensures both the strength of the slider and its self-lubricating ability.

[0056] It should be noted that fiber-reinforced materials are "composite materials." Broadly speaking, composite materials refer to materials composed of two or more components (units) with different properties or structures. From an engineering perspective, composite materials are new materials made by artificially combining two or more materials with different but complementary properties. The components of a composite material are divided into two parts: the matrix and the reinforcement. Here, the solid part 11 can be made of glass fiber, carbon fiber, ultra-high molecular weight polyethylene fiber, polyaramid (aramid) fiber, PBO fiber (poly(p-phenylenebenzodioxazole) fiber), boron fiber, etc.

[0057] In optional embodiments, the foaming method for the foam body or foam layer can be chemical foaming or physical foaming.

[0058] In an optional embodiment of the present invention, the aperture of the receiving hole can be 1-100 micrometers.

[0059] Here, the aperture of the receiving hole can be 20-80 micrometers.

[0060] In an optional embodiment of the present invention, the slider body 1 can be made of a polymer material. This can increase the slider's specific strength, toughness, fatigue resistance, and wear resistance; and by using a low-density polymer material, the slider can effectively save material usage, reduce costs, and achieve lightweight design.

[0061] Here, the polymer material can be one of nylon (PA), polyethylene (PE), polypropylene (PP), polyketone (POK), and polyoxymethylene (POM). This helps to improve the wear resistance of the slider.

[0062] In another optional embodiment of the present invention, the slider body 1 can be made of a modified polymer material. This can further reduce the coefficient of friction of the slider body 1.

[0063] In an optional embodiment, the slider body 1 may be made of modified POK material.

[0064] Specifically, modified POK material can be obtained by adding a low-friction polymer material to POK material, then adding an antioxidant to form a mixed powder, and then extruding and granulating the mixed powder at a high temperature of 230-250 degrees Celsius through an extruder.

[0065] Among them, the polymeric material with a low coefficient of friction can be one or more of polytetrafluoroethylene, molybdenum disulfide, and ultra-high molecular weight polyethylene powder.

[0066] Here, the coefficient of friction of the modified POK material can be 0.15 and the wear amount can be 1.0 mg, while the coefficient of friction of the POK material (pure resin) can be 0.6 and the wear amount can be 1.7 mg (GB / T 3960).

[0067] Furthermore, the ratio of low-friction polymer materials to POK materials can be 1:10. For example, polytetrafluoroethylene (PTFE) can be added to the POK material, and the amount of PTFE added is one-tenth of that of the POK material; or, PTFE and molybdenum disulfide can be added to the POK material, and the total amount of PTFE and molybdenum disulfide added is one-tenth of that of the POK material, and the amounts of PTFE and molybdenum disulfide are the same.

[0068] In an optional embodiment of the present invention, the slider body 1 may also be provided with an oil reservoir and multiple oil outlet holes. The oil reservoir stores lubricating medium, and the oil inlets of the multiple oil outlet holes are connected to the oil reservoir. The oil outlets of the multiple oil outlet holes are located on the contact surface of the slider body 1 for contacting the grinding body. In this way, during the relative sliding process between the slider and the grinding body, the lubricating medium in the oil reservoir can flow to the contact surface of the slider body 1 through the oil outlet holes, keeping the contact surface of the slider body 1 lubricated, thereby lubricating the grinding body and further reducing the friction between the slider body 1 and the grinding body, thus further improving the lubrication effect of the slider.

[0069] In an optional embodiment, a partition can be provided at the oil inlet of the oil outlet. Part of the partition's edge is connected to the wall of the oil outlet, while another part of the partition's edge has a gap with the wall of the oil outlet, or the other part of the partition's edge is in contact with the wall of the oil outlet. In this way, the partition can play a certain blocking role to prevent the lubricating medium in the oil storage tank from entering the oil outlet. Furthermore, since part of the partition's edge has a gap or only contacts the wall of the oil outlet, when the slider body 1 is compressed, some of the lubricating medium in the oil storage tank can flow through the oil outlet to the contact surface of the slider body 1.

[0070] In this way, the partition can prevent other problems caused by excessive flow of lubricating medium, such as dripping due to excessive flow of lubricating medium, which could contaminate the machine environment or working environment.

[0071] The telescopic arm provided by the present invention is described below. The telescopic arm described below can be referred to in correspondence with the slider described above.

[0072] The present invention provides a telescopic arm, comprising a fixed body, a movable body, and a first slider, wherein the first slider is used to slide the fixed body and the movable body, and the first slider can be a slider as described in any of the above embodiments.

[0073] The beneficial effects achieved by the telescopic arm provided by this invention are consistent with the beneficial effects achieved by the slider provided by this invention. The first slider is made of a porous foam material formed by physical or chemical foaming. When the first slider is installed for the first time, grease is applied to the contact surface of the slider body. During the friction process, the grease enters the foam pores of the slider body and is stored therein, which reduces friction during the extension and retraction of the moving body, thereby effectively improving the smoothness of the extension and retraction of the telescopic arm.

[0074] In a first optional embodiment, the first slider can be disposed on the fixed body, and the first slider and the moving body can slide relative to each other. Here, the moving body is equivalent to the grinding body.

[0075] In this embodiment, the contact surface of the first slider that comes into contact with the moving body is coated with a lubricating medium.

[0076] In a second alternative embodiment, the first slider can be disposed on the moving body, and the first slider and the fixed body can slide relative to each other. Here, the fixed body is equivalent to the grinding body.

[0077] In this embodiment, the contact surface of the first slider that contacts the fixed body is coated with a lubricating medium.

[0078] In an optional embodiment, the telescopic arm may further include a telescopic cylinder, the telescopic end of which is connected to the movable body. The telescopic cylinder drives the movable body to slide relative to the fixed body, thereby extending and retracting the movable body.

[0079] In an optional embodiment of the invention, the telescopic arm may further include an oiling device for injecting a lubricating medium into the first slider.

[0080] The oil filling device may include an oil drum, a piston rod, a pressure cap, and a piston. The pressure cap is located at the top of the oil drum to seal it. The piston is located inside the oil drum, and an oil storage chamber is formed between the piston and the bottom of the oil drum. The piston rod passes through the pressure cap and extends into the oil drum to connect with the piston. An oil delivery pipe is connected to the bottom of the oil drum. Moving the piston by the piston rod can cause the lubricating medium in the oil drum to be output through the oil delivery pipe.

[0081] In an optional embodiment, the oiling device can be located outside the fixed body, and the fixed body can be provided with a first through hole for the oil supply pipe to pass through. The oil supply pipe can pass through the first through hole to supply lubricating medium to the contact surface between the slider body 1 and the moving body. In this way, the oiling device can continuously supply lubricating medium to the first slider, thereby achieving sufficient lubrication.

[0082] Alternatively, the oiling device can be located outside the moving body, and the moving body can have a second through hole through which an oil supply pipe passes, allowing the oil supply pipe to supply lubricating medium to the contact surface between the slider body 1 and the moving body. In this way, the oiling device can continuously supply lubricating medium to the first slider, thereby achieving sufficient lubrication.

[0083] In other embodiments, the oil injection device may further include an elastic element, one end of which is connected to the gland and the other end of which is connected to the piston. The elastic element allows the piston to automatically squeeze the lubricating medium, facilitating the flow of the lubricating medium out of the oil reservoir. Here, the elastic element can be a compression spring.

[0084] In this embodiment, the telescopic arm may include a plurality of first sliders.

[0085] In an optional embodiment of the invention, the telescopic arm may further include a plurality of second sliders, which are arranged alternately with a plurality of first sliders, i.e., the plurality of second sliders and the plurality of first sliders are arranged in a staggered manner to form a slider group. Here, the second sliders can be ordinary sliders to reduce costs.

[0086] The working machinery provided by the present invention is described below. The working machinery described below can be referred to in correspondence with the slider or telescopic arm described above.

[0087] The present invention provides a working machine, including a slider as described in any one of the above claims or a telescopic arm as described in any one of the above claims.

[0088] The beneficial effects achieved by the working machinery provided by this invention are consistent with the beneficial effects achieved by the slider or telescopic arm provided by this invention, so they will not be repeated here.

[0089] It should be noted that the aforementioned operating machinery can be cranes, pump trucks, excavators, rotary drilling rigs, forklifts, or aerial work platforms, or other construction machinery equipped with telescopic booms.

[0090] The manufacturing method of the slider provided by the present invention will be described below. The manufacturing method of the slider described below can be referred to in correspondence with the slider described above.

[0091] like Figure 5 As shown, the present invention provides a method for manufacturing a slider, comprising:

[0092] The polymer material is foamed and molded to form the slider body 1;

[0093] Lubricating medium is applied to the contact surface of the slider body 1 that is in contact with the grinding body to form a slider.

[0094] Here, the polymer material can be one of the following: nylon (PA), polyethylene (PE), polypropylene (PP), polyketone (POK), and polyoxymethylene (POM), which have good wear resistance.

[0095] In an optional embodiment, foaming the polymer material may include:

[0096] Polymer materials are foamed to form foamed materials;

[0097] The foamed material is cut to form the slider body 1.

[0098] In this embodiment, the foaming treatment of the polymer material can be performed using either chemical foaming or physical foaming. Here, physical foaming can be used to foam the polymer material.

[0099] In an optional embodiment of the present invention, foaming and molding a polymer material to form a slider body 1 may include:

[0100] Preparation of modified polymer materials;

[0101] The modified polymer material is foamed to form the slider body 1.

[0102] In this way, by using sliders made of modified polymer materials, the coefficient of friction of the slider can be reduced and the lubrication effect of the slider can be improved.

[0103] In optional embodiments, the preparation of modified polymer materials may include:

[0104] Adding low-friction polymers and antioxidants to polymer materials to form hybrid materials;

[0105] The mixture is heated and extruded into granules using an extruder.

[0106] Here, the polymeric material with a low coefficient of friction can be one or more of polytetrafluoroethylene, molybdenum disulfide, and ultra-high molecular weight polyethylene powder.

[0107] In this embodiment, the mixed material is heated and extruded and granulated using an extruder. Specifically, the mixed material is heated to 230-250 degrees Celsius and extruded and granulated using an extruder to form a modified polymer material.

[0108] In this embodiment, polyketone (POK) is used as an example. POK has a coefficient of friction of 0.6 and an abrasion amount of 17 mg (DB / T3960). 10% of a low-friction polymer material (such as polytetrafluoroethylene) is added to POK to form a mixed material. The mixed material is then extruded and granulated at a high temperature of 230-250 degrees Celsius to obtain modified POK. The modified POK has a coefficient of friction of 0.15 and an abrasion amount of 1.0 mg.

[0109] It should be noted that by controlling the foaming process and foaming ratio of the polymer material, the slider body 1 can have a large number of uniformly distributed micron-sized accommodating holes. By applying a lubricating medium to the contact surface of the slider body 1, the lubricating medium can enter the accommodating holes during the use of the slider, achieving lubrication of the slider without dead angles. Furthermore, the slider does not need to be equipped with an oil reservoir and can be directly molded quickly using injection molding and extrusion processes, which helps to reduce costs.

[0110] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing 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 the present invention.

Claims

1. A slider, characterized in that, Includes a slider body, the slider body is provided with multiple receiving holes, and the contact surface of the slider body for contacting the grinding body is coated with a lubricating medium; The slider body is a foam body, and the foam body has closed pores, which are the receiving pores. The slider body includes a solid part and an outer foam layer. The foam cells of the outer foam layer are the receiving holes. The diameter of the receiving holes is 1-100 micrometers. The outer foam layer is disposed on the side of the solid part close to the grinding body. When the contact surface of the slider body is worn, the lubricating medium on the contact surface of the slider body enters the receiving hole and is stored. During the subsequent relative movement between the grinding body and the slider body, it can play a real-time lubrication role. After the receiving hole portion of the slider body storing the lubricating medium is worn, the lubricating medium is applied to the grinding body. Through the relative movement between the grinding body and the slider body, the lubricating medium is carried into the surface of the slider body and fills the new receiving hole. Thus, during the subsequent relative movement between the slider body and the grinding body, the lubricating medium in the receiving hole can lubricate the grinding body, achieving a secondary self-lubricating effect.

2. The slider according to claim 1, characterized in that, The slider body is made of polymer material or modified polymer material.

3. The slider according to claim 1, characterized in that, The solid portion and the outer foam layer are made of the same material; or, the solid portion is made of fiber-reinforced material.

4. A telescopic arm, characterized in that, include: Fixed body; Moving body; A first slider is slidably connected to the fixed body and the movable body, and the first slider is a slider as described in any one of claims 1-3.

5. A type of operating machinery, characterized in that, Includes the slider as described in any one of claims 1-3 or the telescopic arm as described in claim 4.

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