Protective mechanism for telescopic mechanism, telescopic device and operation machine

Abstract

The utility model relates to the technical field of protective devices, and provides a protective mechanism for a telescopic mechanism, a telescopic device and an operation machine.The protective mechanism for the telescopic mechanism comprises a supporting plate, a protective plate and a sealing assembly, and the length direction of the supporting plate and the length direction of the protective plate are both parallel to the telescopic direction of the telescopic mechanism; one of the first end of the protection plate and the supporting plate is connected to the fixed part of the telescopic mechanism, and the other one is connected to the action part of the telescopic mechanism; supporting blocks are fixedly arranged at the second end of the protection plate and are in sliding fit with the supporting plate, and the sealing assembly seals the edge of a sliding fit gap between the supporting plate and the supporting blocks. By means of the arrangement, external dust, impurities and the like can be prevented from entering the sliding fit clearance between the supporting plate and the supporting block, and therefore abrasion to the supporting block and the supporting plate is relieved. Moreover, the sliding fit clearance between the supporting block and the supporting plate can be filled with a lubricating medium, and abrasion to the supporting block and the supporting plate is further reduced through lubrication.

Description

Technical Field

[0001] The utility model relates to the technical field of protective devices, in particular to a protective mechanism for a telescopic mechanism, a telescopic device and an operating machine. Background Art

[0002] A telescopic mechanism generally refers to a mechanism whose total length can be extended or shortened along a certain axis or straight line, such as an oil cylinder, an air cylinder, a ball screw transmission mechanism, a rack and pinion transmission mechanism, etc. Some telescopic mechanisms used in harsh environments where foreign objects may fall are easily damaged by the falling foreign objects, and in severe cases, the telescopic mechanism cannot operate normally. At present, protective devices are used to protect telescopic mechanisms used in harsh environments. For example, taking a hydraulic cylinder as an example, a telescopic plate that can be extended and retracted along the axis of the hydraulic cylinder is provided on the side of the hydraulic cylinder. The telescopic plate extends and retracts as the hydraulic cylinder extends and retracts, thereby achieving full protection of the hydraulic cylinder.

[0003] In the related art, the telescopic plate assembly serving as a protective device includes at least two telescopic plates, and the two adjacent telescopic plates are slidably connected. The sliding matching structure between the two adjacent telescopic plates is subject to wear. Especially in harsh environments, dust, impurities, etc. will inevitably enter between the telescopic plates, further aggravating the wear on the sliding matching structure of the telescopic plates.

[0004] Therefore, how to solve the problem of severe wear of the protective device in the prior art has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] The utility model provides a protective mechanism for a telescopic mechanism, a telescopic device and an operating machine, which are used to solve the defect of severe wear of the protective device in the prior art.

[0006] The utility model provides a protective mechanism for a telescopic mechanism, comprising a support plate, a protective plate and a sealing assembly, wherein the length direction of the support plate and the length direction of the protective plate are both parallel to the telescopic direction of the telescopic mechanism, a first end of the protective plate and one of the support plate is connected to a fixed portion of the telescopic mechanism, and the other is connected to an operating portion of the telescopic mechanism;

[0007] A support block is fixedly provided on the second end of the protective plate, and the support block is in sliding cooperation with the support plate. The sealing assembly is suitable for sealing the edge of the sliding cooperation gap between the support plate and the support block.

[0008] According to a protective mechanism for a telescopic mechanism provided by the utility model, a pair of slide grooves facing each other and extending along the length direction of the protective plate are provided on the support block, the support plate extends into the slide groove, and a groove for storing a lubricating medium is provided on the side wall of the slide groove.

[0009] According to a protective mechanism for a telescopic mechanism provided by the present invention, it also includes a filling assembly, the outlet end of the filling assembly is connected to the sliding fit gap between the support plate and the support block and at least one of the grooves, and the opening and closing state of the inlet end of the filling assembly is controllable.

[0010] According to a protective mechanism for a telescopic mechanism provided by the present utility model, the filling assembly includes at least one of a first filling channel and a second filling channel;

[0011] The first filling channel is provided on the support block, the first end of the first filling channel serves as the outlet end of the filling assembly, and the second end of the first filling channel serves as the inlet end of the filling assembly;

[0012] The second filling channel is arranged on the support block, the first end of the second filling channel serves as the outlet end of the filling assembly, the second end of the second filling channel is connected to a delivery pipeline, the first end of the delivery pipeline is connected to the second end of the second filling channel, the second end of the delivery pipeline serves as the inlet end of the filling assembly, and the second end of the delivery pipeline extends to the first end of the protective plate.

[0013] According to a protective mechanism for a telescopic mechanism provided by the utility model, the filling assembly also includes an injection nozzle, and the second end of the first filling channel and the second end of the delivery pipeline are provided with the injection nozzle, and the injection nozzle only allows the lubricating medium to flow in the direction from the inlet end to the outlet end of the filling assembly.

[0014] According to a protective mechanism for a telescopic mechanism provided by the present invention, the protective plate includes a main body portion and a connecting portion, and the connecting portion is fixedly arranged at the end of the main body portion;

[0015] The support block includes a first support block and a second support block, the first support block and the second support block are distributed on both sides of the connecting portion, the distribution direction of the first support block and the second support block is perpendicular to the length direction of the support plate, two of the pair of slide grooves are respectively arranged on the first support block and the second support block, and the first support block and the second support block are both detachably connected to the connecting portion.

[0016] According to a protective mechanism for a telescopic mechanism provided by the present invention, the sealing assembly includes a first sealing gasket, a second sealing gasket and a pressing plate;

[0017] The first sealing gasket is provided between one of the surfaces of the first supporting block and the second supporting block, which is adjacent to the side wall of the chute and opposite to the connecting portion, and the connecting portion;

[0018] On each surface of the first support block and the second support block, one adjacent to the side wall of the chute and not opposite to the connecting portion is provided with the second sealing gasket and the pressing plate, and the pressing plate presses and fixes the second sealing gasket to the first support block or the second support block;

[0019] The first sealing gasket and the second sealing gasket are both in sliding sealing contact with the support plate.

[0020] According to a protective mechanism for a telescopic mechanism provided by the present invention, the first end of the protective plate is hinged to the telescopic mechanism through a connecting mechanism, and the connecting mechanism includes a connecting shaft, a pad, a first fastener and a second fastener;

[0021] The connecting shaft is located in the hinge hole at the first end of the protective plate and the hinge hole of the telescopic mechanism. A limiting boss is provided at the first end of the connecting shaft. The first fastener is threadedly connected to the first end of the connecting shaft. The pad is sleeved on the second end of the connecting shaft. The second fastener is threadedly connected to the second end of the connecting shaft. The thread rotation direction of the first fastener is the same as the thread rotation direction of the second fastener.

[0022] The utility model also provides a telescopic device, comprising a telescopic mechanism and a protective device for protecting the telescopic mechanism, wherein the protective device is the protective mechanism for the telescopic mechanism mentioned above.

[0023] The utility model also provides an operating machine, comprising the above-mentioned protective mechanism for the telescopic mechanism, or comprising the above-mentioned telescopic device.

[0024] The utility model provides a protective mechanism for a telescopic mechanism, comprising a support plate, a protective plate and a sealing assembly. The length direction of the support plate and the length direction of the protective plate are both parallel to the telescopic direction of the telescopic mechanism. One of the first end of the protective plate and the support plate is connected to the fixed part of the telescopic mechanism, and the other is connected to the action part of the telescopic mechanism. A support block is fixedly provided at the second end of the protective plate. The support block and the support plate are slidably matched, so that when the telescopic mechanism is telescopic, the protective plate and the support plate can slide back and forth with the telescopic movement of the telescopic mechanism, thereby realizing full-stroke protection of the telescopic mechanism. The sealing assembly can seal the edge of the sliding fit gap between the support plate and the support block. In this arrangement, the support plate only slides with the support block on the protective plate, and the sealing assembly is used to seal the edge of the sliding fit gap between the support plate and the support block, which can prevent external dust, impurities, etc. from entering the sliding fit gap between the support plate and the support block, thereby alleviating wear on the support block and the support plate. Moreover, the sliding fit gap between the support plate and the support block is sealed, and a lubricating medium can be filled in the sliding fit gap between the support block and the support plate. Through lubrication, the wear on the support block and the support plate can be further reduced, thereby solving the problem of severe wear of the protective device in the prior art.

[0025] Furthermore, in the telescopic device provided by the present invention, since it is provided with the protective mechanism for the telescopic mechanism as described above, it also has the various advantages as described above.

[0026] Furthermore, the working machine provided by the present invention also has the various advantages as described above because it is provided with the protective mechanism or telescopic device for the telescopic mechanism as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 The utility model is a schematic structural diagram of a protective mechanism for a telescopic mechanism provided by the present invention when the protective mechanism is arranged on an excavator.

[0029] Figure 2 It is a structural schematic diagram of a protective mechanism for a telescopic mechanism provided by the utility model.

[0030] Figure 3 It is an exploded view of the protective mechanism for the telescopic mechanism provided by the utility model.

[0031] Figure 4It is a structural schematic diagram of the support plate and the pipe clamp provided by the utility model.

[0032] Figure 5 It is a structural schematic diagram of the protective plate and the support block provided by the utility model at a certain viewing angle.

[0033] Figure 6 This is a structural schematic diagram of the protective plate and the support block provided by the utility model at another viewing angle.

[0034] Figure 7 It is a structural schematic diagram of the protective plate provided by the utility model.

[0035] Figure 8 It is a structural schematic diagram of the protective plate, the first support block, the second support block and the sealing assembly provided by the present invention (in order to illustrate the structure of the sealing assembly, the protective plate is set to be transparent in this figure).

[0036] Figure 9 It is a structural schematic diagram of the sealing assembly, the first support block and the support shell provided by the present invention (only some bolts are shown).

[0037] Reference numerals:

[0038] 1. Support plate; 2. Protective plate; 3. Slide groove; 4. Groove; 5. Delivery pipeline; 6. Injection nozzle; 7. Main body; 8. First support block; 9. Second support block; 10. First sealing gasket; 11. Second sealing gasket; 12. Pressing plate; 13. Connecting shaft; 14. Pad; 15. First fastener; 16. Second fastener; 17. Connecting bolt; 18. Support shell; 19. Sleeve; 20. Telescopic mechanism; 21. Pipe clamp; 22. Pipe joint; 23. Connecting part. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] The following combination Figures 1 to 9 The utility model describes a protective mechanism for a telescopic mechanism.

[0041] like Figures 1 to 9 As shown, the protective mechanism for the telescopic mechanism provided by the embodiment of the present invention includes a support plate 1, a protective plate 2 and a sealing assembly.

[0042] Specifically, the length direction of the support plate 1 and the length direction of the protective plate 2 are parallel to the telescopic direction of the telescopic mechanism 20. The first end of the protective plate 2 and one of the support plate 1 are connected to the fixed part of the telescopic mechanism 20, and the other is connected to the moving part of the telescopic mechanism 20.

[0043] The telescopic mechanism 20 may be, but is not limited to, an oil cylinder, an air cylinder, a ball screw transmission mechanism, a rack and pinion transmission mechanism, etc. When the telescopic mechanism 20 is a hydraulic cylinder, the support plate 1 can be fixedly connected to the cylinder barrel of the hydraulic cylinder, and the first end of the protective plate 2 can be fixedly connected to the piston rod end of the hydraulic cylinder.

[0044] A support block is fixedly provided at the second end of the protective plate 2, and the support block slides with the support plate 1, so that when the telescopic mechanism 20 telescopes, the protective plate 2 and the support plate 1 can slide back and forth with the telescopic movement of the telescopic mechanism 20, thereby realizing full-stroke protection of the telescopic mechanism 20.

[0045] The sealing assembly can seal the edge of the sliding fit gap between the support plate 1 and the support block.

[0046] With this arrangement, the support plate 1 only slides with the support block on the protective plate 2, and the sealing assembly seals the edges of the sliding gap between the support plate 1 and the support block. This prevents external dust, impurities, and the like from entering the sliding gap between the support plate 1 and the support block, thereby alleviating wear on the support block and the support plate 1. Furthermore, since the sliding gap between the support plate 1 and the support block is sealed, a lubricant can be filled into the sliding gap between the support block and the support plate 1. Lubrication further reduces wear on the support block and the support plate 1, thereby resolving the problem of severe wear and tear that exists in protective devices of the prior art.

[0047] The lubricating medium may be, but is not limited to, grease.

[0048] In this embodiment of the present invention, a pair of chute grooves 3 are provided on the support block. The chute grooves 3 are arranged facing each other, and the distribution direction of the pair of chute grooves 3 is parallel to the plane of the support plate 1 and perpendicular to the length of the protective plate 2. The pair of chute grooves 3 extend along the length of the protective plate 2 and penetrate the support block. The support plate 1 extends into the chute grooves 3, and the support plate 1 can slide back and forth relative to the chute grooves 3.

[0049] A groove 4 is provided on the side wall of the slide 3, which can store lubricating medium, increasing the amount of lubricating medium between the support block and the support plate 1, which is beneficial to improving the lubrication performance and continuous lubrication time of the support block and the support plate 1, and extending the maintenance cycle.

[0050] In a specific embodiment, a group of grooves 4 can be provided on each side wall of the chute 3, and the group of grooves 4 are spaced apart along the length direction of the protective plate 2. Figure 8 Two grooves 4 are provided on one side wall of the chute 3 , and the two grooves 4 are spaced apart along the length direction of the protective plate 2 .

[0051] In a further embodiment, the protective mechanism for the telescopic mechanism further includes a filling assembly, the outlet of which is connected to at least one of the sliding clearance between the support plate 1 and the support block and the groove 4, and the inlet of which is controllably openable and closed. The filling assembly allows lubricating medium to be added to the sliding clearance between the support plate 1 and the support block and to the groove 4.

[0052] The sliding clearance between the support plate 1 and the support block is connected to the groove 4. Lubricant can be injected into one of the two, and the lubricant's fluidity and pressure can be applied to the other. In this embodiment, the specific location of the injection assembly's outlet is not limited; it only needs to be able to communicate with either the sliding clearance between the support plate 1 and the support block or the groove 4.

[0053] In this embodiment, the filling assembly includes at least one of a first filling channel and a second filling channel.

[0054] The first filling channel is arranged on the support block, the first end of the first filling channel serves as the outlet end of the filling assembly, and the second end of the first filling channel serves as the inlet end of the filling assembly.

[0055] The lubricating medium filling gun is connected to the second end of the first filling channel, and the lubricating medium can be filled through the first filling channel.

[0056] The second filling channel is provided on the support block. The first end of the second filling channel serves as the outlet of the filling assembly. The second end of the second filling channel is connected to the delivery pipeline 5. The first end of the delivery pipeline 5 is connected to the second end of the second filling channel, and the second end of the delivery pipeline 5 serves as the inlet of the filling assembly. The second end of the delivery pipeline 5 extends to the first end of the protective plate 2.

[0057] By connecting a lubricating medium filling gun to the second end of the delivery pipeline 5 , the lubricating medium can be filled through the delivery pipeline 5 and the second filling channel.

[0058] The delivery pipeline 5 is connected to the second filling channel via a pipe joint 22 .

[0059] In this embodiment, the filling assembly also includes an injection nozzle 6. The second end of the first filling channel and the second end of the delivery pipeline 5 are both provided with an injection nozzle 6. The injection nozzle 6 only allows the lubricating medium to flow in the direction from the inlet end to the outlet end of the filling assembly. That is, the injection nozzle 6 can prevent the lubricating medium from leaking outward. The lubricating medium filling gun is connected to the injection nozzle 6 to realize the filling of the lubricating medium. The operation is convenient and has low operating difficulty.

[0060] The injection nozzle 6 can be but is not limited to a grease nipple, which has an external thread. A threaded hole is provided on the first end of the support block and the protective plate 2, and the grease nipple can be installed on the support block or the protective plate 2 by a threaded connection.

[0061] It should be noted that only the first filling channel can be provided, only the second filling channel can be provided, or both the first filling channel and the second filling channel can be provided. When both the first filling channel and the second filling channel are provided, an injection nozzle 6 is provided at the first end of the protective plate 2, and an injection nozzle 6 is also provided at the support block at the second end of the protective plate 2. When the lubricating medium needs to be added, the injection nozzle 6 at a lower position can be selected for filling according to the height of the two ends of the protective plate 2. Moreover, the injection nozzles 6 at both ends of the protective plate 2 and the corresponding first filling channel and the second filling channel can serve as backup for each other. When the protective plate 2 is damaged or deformed, resulting in the inability of the conveying pipeline 5 to circulate the lubricating medium, filling can be performed through the injection nozzle 6 on the support block.

[0062] In the embodiment of the present invention, the protective plate 2 includes a main body 7 and a connecting portion 23, and the connecting portion 23 is fixedly arranged at the end of the main body 7. The support block includes a first support block 8 and a second support block 9, and the first support block 8 and the second support block 9 are distributed on both sides of the connecting portion 23. The distribution direction of the first support block 8 and the second support block 9 is perpendicular to the length direction of the support plate 1. Two of the pair of slide grooves 3 are respectively arranged on the first support block 8 and the second support block 9, such as Figure 8 shown.

[0063] The first support block 8 and the second support block 9 are both detachably connected to the connection portion 23 . Specifically, the first support block 8 and the second support block 9 can be fixed to the connection portion 23 by connecting bolts 17 .

[0064] The first support block 8 and the second support block 9 are components that are in direct sliding contact with the support plate 1 and are subject to wear and tear. They are consumable parts and require regular replacement. By replacing the first support block 8 and the second support block 9, the protective plate 2 and the connecting portion 23 can be continuously used, which helps reduce costs. The first support block 8 and the second support block 9 are configured as a detachable structure, which can facilitate replacement of the first support block 8 and the second support block 9 and facilitate maintenance.

[0065] The material of the first support block 8 and the second support block 9 can be made of nylon. In a specific embodiment, the first support block 8 and the second support block 9 can also be provided with corresponding support shells 18, which are covered on the outside of the first support block 8 and the second support block 9. Figure 8 The supporting shell 18 can provide rigid support for the first supporting block 8 and the second supporting block 9, thereby improving structural stability.

[0066] When the support blocks and support housing 18 are mounted on the connection portion 23, threaded holes can be provided on the connection portion 23, and connection holes can be provided on the first support block 8, the second support block 9, and the corresponding support housing 18, and then tightened and connected using connection bolts 17. Sleeves 19 can also be provided on the first support block 8 and the second support block 9. Sleeves 19 are embedded in the first support block 8 and the second support block 9. When the connection bolts 17 pass through the first support block 8 and the second support block 9, the connection bolts 17 are located in the sleeves 19, and the sleeves 19 can provide support to reduce deformation of the first support block 8 and the second support block 9.

[0067] For the locations where the injection nozzle 6 and the delivery pipeline 5 are arranged, corresponding avoidance holes need to be provided on the support shell 18 .

[0068] In this embodiment, the sealing assembly includes a first sealing gasket 10 , a second sealing gasket 11 and a pressing plate 12 .

[0069] Among the surfaces of the first support block 8 and the second support block 9, the one adjacent to the side wall of the slide groove 3 and opposite to the connecting portion 23 is called the first one, and the one adjacent to the side wall of the slide groove 3 and not opposite to the connecting portion 23 is called the second one.

[0070] A first sealing gasket 10 is disposed between the first support block 8 and the connection portion 23, and is in sliding, sealing contact with the support plate 1. When the first support block 8 and the connection portion 23 are bolted together, the preload force of the connecting bolts 17 can be used to compress the first sealing gasket 10 between the first support block 8 and the connection portion 23. Similarly, when the second support block 9 and the connection portion 23 are bolted together, the preload force of the connecting bolts 17 can be used to compress the first sealing gasket 10 between the second support block 9 and the connection portion 23.

[0071] Each second support block is provided with a second sealing gasket 11 and a pressure plate 12. The pressure plate 12 and the second sealing gasket 11 can be fixed to the first support block 8 or the second support block 9 using screws or bolts. The second sealing gasket 11 is in sliding sealing contact with the support plate 1. The pre-tightening force of the bolts or screws can make the pressure plate 12 press the second sealing gasket 11 tightly, thereby improving the sealing performance.

[0072] It should be noted that in this embodiment, only the setting position of the sealing gasket of the sealing assembly is distinguished. The first sealing gaskets 10 located at different positions may have the same or different shapes. Regardless of the shape, as long as they are located between the first one and the connecting portion 23, they are called first sealing gaskets 10. Similarly, the second sealing gaskets 11 located at different positions may have the same or different shapes. Regardless of the shape, as long as they are not facing the surface of the connecting portion 23, they are called second sealing gaskets 11. The same applies to the pressure plate. For example, Figure 8 and Figure 9 Two different shapes of the second sealing gasket 11 and the pressing plate 12 are shown in FIG.

[0073] Taking the telescopic mechanism 20 as a hydraulic cylinder as an example, the connection structure between the protective mechanism for the telescopic mechanism and the telescopic mechanism 20 provided in this embodiment is explained.

[0074] At least two pipe clamps 21 are provided on the support plate 1, and the pipe clamps 21 are spaced apart along the length direction of the support plate 1. The pipe clamps 21 are fixed to the support plate 1 by bolts.

[0075] The pipe clamp 21 can clamp the cylinder barrel of the hydraulic cylinder, thereby detachably connecting the support plate 1 to the cylinder barrel of the hydraulic cylinder.

[0076] The first end of the protective plate 2 and the end of the hydraulic cylinder's piston rod are both equipped with connecting lugs, each with a hinge hole, which hinges the connecting lug of the protective plate 2 to the connecting lug of the hydraulic cylinder. This means that the first end of the protective plate 2 and the end of the hydraulic cylinder's piston rod are detachably connected, making it easy to replace the protective plate 2 if it becomes damaged or deformed, making it unusable.

[0077] The first end of the protective plate 2 is hingedly connected to the piston rod end of the hydraulic cylinder via a connecting mechanism. The connecting mechanism includes a connecting shaft 13, a backing plate 14, a first fastener 15, and a second fastener 16. The connecting shaft 13 is located within the hinge hole at the first end of the protective plate 2 and the hinge hole at the piston rod end of the hydraulic cylinder. A limiting boss is provided at the first end of the connecting shaft 13. The backing plate 14 is sleeved onto the second end of the connecting shaft 13. The second fastener 16 is threadedly connected to the second end of the connecting shaft 13. The end of the second fastener 16 that is away from the connecting shaft 13 can abut against the backing plate 14. Both the backing plate 14 and the limiting boss can abut against the connecting lug plate, thereby preventing the connecting shaft 13 from falling off, thereby achieving the hinged connection between the first end of the protective plate 2 and the piston rod end of the hydraulic cylinder.

[0078] The first fastener 15 is threadedly connected to the first end of the connecting shaft 13. The cross-section of the end of the first fastener 15 away from the connecting shaft 13 is non-circular, and the cross-section of the end of the second fastener 16 away from the connecting shaft 13 is non-circular. The thread direction of the first fastener 15 and the second fastener 16 are the same. When the connecting shaft 13 needs to be disassembled, the first fastener 15 and the second fastener 16 can be applied separately with a wrench to complete the disassembly, making the operation convenient.

[0079] The first fastener 15 and the second fastener 16 may be, but are not limited to, hexagon socket bolts, hexagon socket bolts, etc.

[0080] It should be noted that, in the embodiment of the present invention, washers can be used appropriately when bolts are used for connection.

[0081] For the support plate, weight-reducing holes can also be provided to reduce the mass of the support plate and the mass of the protective mechanism used for the telescopic mechanism, which is conducive to the promotion of lightweight design.

[0082] In summary, the protective mechanism for the telescopic mechanism provided by the embodiment of the present invention has the advantages of reliable protection, easy assembly and disassembly, convenient maintenance, labor saving, and high environmental adaptability.

[0083] On the other hand, embodiments of the present invention further provide a telescopic device, including the protective mechanism for a telescopic mechanism provided in any of the aforementioned embodiments, which possesses all the advantages of the aforementioned protective mechanisms for telescopic mechanisms and will not be further described here. The derivation process for the beneficial effects of the telescopic device in embodiments of the present invention is generally similar to the derivation process for the beneficial effects of the aforementioned protective mechanisms for telescopic mechanisms and will not be further described here.

[0084] In another aspect, embodiments of the present invention further provide a work machine comprising the protective mechanism or telescopic device for a telescopic mechanism provided in any of the aforementioned embodiments. This machine possesses all the advantages of the aforementioned protective mechanism or telescopic device for a telescopic mechanism, and will not be further elaborated upon here. The derivation process for the beneficial effects of the work machine in the embodiments of the present invention is generally similar to that of the aforementioned protective mechanism or telescopic device for a telescopic mechanism, and will not be further elaborated upon here.

[0085] In the embodiments of the present invention, the type of working machine is not limited, for example, the working machine may be an excavator, a crane, a loader, etc. In other words, as long as the working machine can use the protective mechanism for the telescopic mechanism in the embodiments of the present invention, it will be sufficient.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A protective mechanism for a telescopic mechanism, characterized in that: The invention comprises a support plate (1), a protective plate (2) and a sealing assembly, wherein the length direction of the support plate (1) and the length direction of the protective plate (2) are both parallel to the telescopic direction of the telescopic mechanism (20), and one of the first end of the protective plate (2) and the support plate (1) is connected to the fixed part of the telescopic mechanism (20), and the other is connected to the action part of the telescopic mechanism (20); A support block is fixedly provided at the second end of the protective plate (2), the support block is in sliding engagement with the support plate (1), and the sealing assembly is suitable for sealing the edge of the sliding engagement gap between the support plate (1) and the support block.

2. The protective mechanism for the telescopic mechanism according to claim 1, characterized in that: The support block is provided with a pair of slide grooves (3) facing each other and extending along the length direction of the protective plate (2); the support plate (1) extends into the slide grooves (3); and the side walls of the slide grooves (3) are provided with grooves (4) for storing lubricating medium.

3. The protective mechanism for the telescopic mechanism according to claim 2, characterized in that: It also includes a filling assembly, the outlet end of which is connected to at least one of the sliding fit gap between the support plate (1) and the support block and the groove (4), and the opening and closing state of the inlet end of the filling assembly is controllable.

4. The protective mechanism for the telescopic mechanism according to claim 3, characterized in that: The filling assembly includes at least one of a first filling channel and a second filling channel; The first filling channel is provided on the support block, the first end of the first filling channel serves as the outlet end of the filling assembly, and the second end of the first filling channel serves as the inlet end of the filling assembly; The second filling channel is provided on the support block, the first end of the second filling channel serves as the outlet end of the filling assembly, the second end of the second filling channel is connected to a delivery pipeline (5), the first end of the delivery pipeline (5) is connected to the second end of the second filling channel, the second end of the delivery pipeline (5) serves as the inlet end of the filling assembly, and the second end of the delivery pipeline (5) extends to the first end of the protective plate (2).

5. The protective mechanism for the telescopic mechanism according to claim 4, characterized in that: The filling assembly further comprises an injection nozzle (6), the second end of the first filling channel and the second end of the delivery pipeline (5) being provided with the injection nozzle (6), the injection nozzle (6) only allowing the lubricating medium to flow in a direction from the inlet end to the outlet end of the filling assembly.

6. The protective mechanism for a telescopic mechanism according to any one of claims 2 to 5, characterized in that: The protective plate (2) comprises a main body portion (7) and a connecting portion (23), wherein the connecting portion (23) is fixedly arranged at the end of the main body portion (7); The support block comprises a first support block (8) and a second support block (9), the first support block (8) and the second support block (9) are distributed on both sides of the connecting portion (23), the distribution direction of the first support block (8) and the second support block (9) is perpendicular to the length direction of the support plate (1), two of the pair of slide grooves (3) are respectively arranged on the first support block (8) and the second support block (9), and the first support block (8) and the second support block (9) are both detachably connected to the connecting portion (23).

7. The protective mechanism for the telescopic mechanism according to claim 6, characterized in that: The sealing assembly comprises a first sealing gasket (10), a second sealing gasket (11) and a pressing plate (12); The first sealing gasket (10) is provided between one of the surfaces of the first support block (8) and the second support block (9) that is adjacent to the side wall of the slide groove (3) and opposite to the connecting portion (23); The second sealing gasket (11) and the pressing plate (12) are correspondingly provided on the surfaces of the first support block (8) and the second support block (9), which is adjacent to the side wall of the slide groove (3) and not opposite to the connecting portion (23), and the pressing plate (12) presses and fixes the second sealing gasket (11) to the first support block (8) or the second support block (9); The first sealing gasket (10) and the second sealing gasket (11) are both in sliding sealing contact with the support plate (1).

8. The protective mechanism for a telescopic mechanism according to claim 1, characterized in that: The first end of the protective plate (2) is hinged to the telescopic mechanism (20) via a connecting mechanism, wherein the connecting mechanism comprises a connecting shaft (13), a backing plate (14), a first fastener (15), and a second fastener (16); The connecting shaft (13) is located in the hinge hole at the first end of the protective plate (2) and the hinge hole of the telescopic mechanism (20), the first end of the connecting shaft (13) is provided with a limiting boss, the first fastener (15) is threadedly connected to the first end of the connecting shaft (13), the pad (14) is sleeved on the second end of the connecting shaft (13), the second fastener (16) is threadedly connected to the second end of the connecting shaft (13), and the thread rotation direction of the first fastener (15) is the same as the thread rotation direction of the second fastener (16).

9. A telescopic device, characterized in that: It comprises a telescopic mechanism (20) and a protective device for protecting the telescopic mechanism (20), wherein the protective device is the protective mechanism for the telescopic mechanism according to any one of claims 1 to 8.

10. A working machine, characterized in that: It comprises the protective mechanism for the telescopic mechanism according to any one of claims 1 to 8, or comprises the telescopic device according to claim 9.

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