Pin shaft protection device

Abstract

The present application relates to the technical field of engineering machinery, and discloses a pin shaft protection device, a pin shaft passes through a structure along an axial direction, the pin shaft protection device comprises a baffle and a sealing limiting mechanism, the baffle is connected with the axial end of the pin shaft, and the baffle and the structure are oppositely arranged along the axial direction; the sealing limiting mechanism is sleeved outside the pin shaft and is sealingly limited between the baffle and the structure, and the sealing limiting mechanism comprises at least two protection pieces, and any two adjacent protection pieces are sealingly connected along the axial direction in a detachable mode. The present application can prevent the pin shaft from moving, can meet the sealing effect, can ensure the efficiency, use performance and environmental protection of the pin shaft during reinstallation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a pin shaft protection device. BACKGROUND

[0002] With the development of science and technology, large engineering machinery is more and more widely used in people's life, and a pin shaft is usually used for connection in engineering machinery. For example, an ultra-large excavator (hereinafter referred to as an ultra-large excavator) in the prior art is mainly used for soil stripping or resource exploitation in open-pit mines, and has the characteristics of high efficiency and safety. During transportation, the ultra-large excavator often needs to be disassembled, and the working device part is disassembled into a bucket assembly, a bucket rod assembly and an arm assembly. Since the pin shafts at each hinge point are very heavy, for example, the upper and middle support pin shafts of the arm of a 90t ultra-large excavator weigh 180kg. In order to facilitate installation, the pin shafts are usually disassembled and installed on the corresponding assemblies. Such pin shafts can be installed on the left and right sides, so there is no limiting device on the left and right sides during transportation, and the pin shafts can move left and right and easily fall off.

[0003] Generally, the two ends of the pin shaft are tied with a rope to fix the pin shaft, and the exposed part of the pin shaft is easily eroded by rainwater. Or an installation plate of an oil cylinder is installed at both ends of the pin shaft. Although this method ensures that the pin shaft does not fall off, the pin shaft can still move, which has the risk of knocking the structure at the hinge point of the arm. In addition, the exposed pin shaft is easily corroded and rusted by rainwater or moisture, which increases the difficulty of reassembly and reduces the use performance. In addition, the common protection method is to seal the two ends of the pin shaft with a cloth bag or plastic tape to achieve a sealing effect. However, this method is easily invalidated in high-temperature or cold environments, and when the pin shaft moves axially, it will be pushed to one side, losing the protection effect, so the protection effect is not ideal. After the pin shaft is disassembled, the sealing members such as cloth bags, plastic and adhesive tape are randomly discarded, polluting the environment. SUMMARY

[0004] The purpose of the present application is to provide a pin shaft protection device to solve the technical problems of poor protection effect and easy pollution of the environment in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present application provides a pin shaft protection device in one aspect, a pin shaft passes through a structure along its axial direction, the pin shaft protection device comprising: a baffle connected with the axial end of the pin shaft, the baffle and the structure being oppositely arranged along the axial direction; a sealing and limiting mechanism sleeved outside the pin shaft and sealed and limited between the baffle and the structure, the sealing and limiting mechanism comprising at least two protection members, any two adjacent protection members being detachably sealed and connected along the axial direction.

[0006] In some embodiments, the at least two guards comprise: a shield, the structure is provided with a mounting end face, the shield is provided with a first guard segment completely covering the mounting end face; an adjuster, the axial sealing is limited between the shield and the baffle, the shield is provided with a second guard segment in sealing cooperation with the adjuster.

[0007] In some embodiments, the number of the adjusters is at least two, and the adjusters and the second guard segment are both provided with tail sealing structures, the adjusters are provided with head sealing structures, the head sealing structures are used for sealing and limiting cooperation with the tail sealing structures, and sequentially engaging and relatively fixing the guards.

[0008] In some embodiments, the tail sealing structure comprises a first guard ring and a second guard ring connected in sequence along the axial direction, the first guard ring is provided with a limiting groove on one side facing the second guard ring, the head sealing structure comprises a limiting block and a mounting groove, the limiting block and the limiting groove are in limiting cooperation along the axial direction and the circumferential direction of the pin shaft, and the second guard ring can extend into the mounting groove and be in limiting cooperation with the mounting groove along the radial direction of the pin shaft.

[0009] In some embodiments, the limiting block is arranged at one end of the first guard ring away from the second guard ring, and the cross-sectional dimension of the second guard ring is smaller than that of the first guard ring, and the mounting groove is arranged on the inner side of the first guard ring.

[0010] In some embodiments, the number of the limiting grooves is multiple, and the multiple limiting grooves are arranged at intervals along the circumferential direction, and a rear limiting surface is arranged between any two adjacent limiting grooves, and the adjuster is provided with a front limiting surface matched with the rear limiting surface.

[0011] In some embodiments, the limiting groove comprises a vertical segment, an avoiding segment and a horizontal segment connected in sequence, the horizontal segment extends along the axial direction, the vertical segment is perpendicular to the horizontal segment and used for surface contact with the limiting block, and the avoiding segment is used for avoiding the limiting block.

[0012] In some embodiments, the pin shaft protection device further comprises a first sealing ring sealed between the tail sealing structure and the head sealing structure, and the tail sealing structure is provided with a first sealing groove in sealing cooperation with the first sealing ring.

[0013] In some embodiments, the pin shaft protection device further comprises a second sealing ring sealed between the first protection segment and the structure, the end of the first protection segment away from the second protection segment is provided with a second sealing groove in sealing cooperation with the second sealing ring; and / or, the inner wall of the first protection segment is provided with a weight-reducing groove; and / or, the cross-sectional dimension of the second protection segment is smaller than that of the first protection segment, and the axial length of the adjuster is smaller than that of the shield.

[0014] In some embodiments, the outer surface of the protection piece is provided with handrail blocks, and each handrail block is staggered around the circumference of the pin shaft; and / or, the pin shaft protection device further comprises a positioning ring sealed between the protection piece and the baffle, the protection piece partially extends into the positioning ring and is limited in cooperation with the positioning ring along the radial direction of the pin shaft.

[0015] Through the above technical solutions, the arm support device provided by the embodiments has the following beneficial effects:

[0016] When assembling the pin shaft protection device, the protection pieces with appropriate sizes or appropriate numbers can be selected according to the length of the pin shaft, at least two protection pieces are sequentially sleeved on the pin shaft, the first protection piece can be pressed onto the structure at the bottom after being sleeved on the pin shaft, and is sealed with the structure, and the subsequent protection pieces are sequentially sleeved according to the remaining length of the pin shaft. After the outer side wall of the pin shaft is completely covered by the at least two protection pieces, the baffle is connected with the pin shaft, the baffle and the structure are pressed and sealed in the axial direction to fix the protection pieces in the axial direction relative to the baffle and the structure, and the protection pieces can abut against the baffle, so as to limit the pin shaft in the axial direction, avoid axial movement of the pin shaft, avoid human body injury and object damage caused by axial movement of the pin shaft during transportation without disassembling the pin shaft, and avoid exposure of the pin shaft, completely seal the outer surface of the pin shaft, and solve the risk of corrosion by rainwater, oil and other liquids during transportation or storage of the pin shaft in an exposed form. In addition, the multiple protection pieces are connected in a detachable manner, which can continuously recycle the protection pieces, save resources, and is more environmentally friendly than the plastic winding method. Through the sealing cooperation of the baffle and the at least two protection pieces, the pin shaft can be effectively protected, and the problem of environmental pollution can be avoided. That is, the pin shaft can be prevented from moving axially, the sealing effect can be met, the installation efficiency of the pin shaft can be ensured, the use performance and environmental protection can be met.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain embodiments of the application. In the drawings:

[0019] Figure 1 is a structural schematic view of a pin shaft protection device and a structure cooperating in one perspective according to an embodiment of the application;

[0020] Figure 2 is a structural schematic view of a pin shaft protection device and a structure cooperating in another perspective according to an embodiment of the application;

[0021] Figure 3 is a sectional structural schematic view of a pin shaft protection device and a structure cooperating according to an embodiment of the application;

[0022] Figure 4 is a positioning ring structural schematic view of a pin shaft protection device according to an embodiment of the application;

[0023] Figure 5 is a shield structural schematic view of a pin shaft protection device according to an embodiment of the application;

[0024] Figure 6 is a shield sectional structural schematic view of a pin shaft protection device according to an embodiment of the application;

[0025] Figure 7 is an adjuster structural schematic view of a pin shaft protection device according to an embodiment of the application;

[0026] Figure 8 is an adjuster sectional structural schematic view of a pin shaft protection device according to an embodiment of the application.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Reference Signs List

[0029] 100 pin shaft protection device 312 rear limiting surface

[0030] 10 baffle 313 hand rest block

[0031] 20 sealing limiting mechanism 32 second protection ring

[0032] 201 protection piece 321 first sealing groove

[0033] 1 shield 4 head sealing structure

[0034] 11 first protection section 41 limiting block

[0035] 111 second sealing groove 42 installation groove

[0036] 112 weight-reducing groove 5 first sealing ring

[0037] 12 second protection section 6 second sealing ring

[0038] 2 regulator 7 positioning ring

[0039] 3 tail sealing structure 71 protrusion

[0040] 31 first protection ring 72 arc angle

[0041] 311 limiting groove 200 pin shaft

[0042] 3111 vertical section 300 structure body

[0043] 3112 avoidance section 310 installation end face

[0044] 3113 horizontal section DETAILED DESCRIPTION

[0045] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended for illustration and explanation of the present application, and are not intended to limit the present application.

[0046] The pin shaft protection device 100 according to the present application is described below with reference to the accompanying drawings. The pin shaft 200 passes through the structure body 300 along the axial direction thereof. The pin shaft protection device 100 comprises a baffle plate 10 and a sealing and limiting mechanism 20. The baffle plate 10 is connected with the axial end of the pin shaft 200, and the baffle plate 10 and the structure body 300 are arranged opposite to each other along the axial direction. The sealing and limiting mechanism 20 is sleeved on the pin shaft 200 and is sealed and limited between the baffle plate 10 and the structure body 300. The sealing and limiting mechanism 20 comprises at least two protection members 201. Any two adjacent protection members 201 are detachably and sealingly connected along the axial direction.

[0047] In an embodiment, the pin shaft 200 in the embodiment is in a cylindrical shape, and the baffle plate 10 is in a flat plate shape. The baffle plate 10 and the pin shaft 200 are connected through bolts and gaskets. The cross-sectional dimension of the baffle plate 10 is greater than that of the pin shaft 200. The upper and lower ends of the baffle plate 10 are protruded relative to the pin shaft 200. The baffle plate 10 can completely cover the axial end face of the pin shaft 200. The axial direction of the pin shaft 200 is the axial direction of the pin shaft 200. For example, the axial direction of the pin shaft 200 is the direction along the axis of the pin shaft 200. Figure 3The left-right direction in the figure is the circumferential direction of the pin shaft 200, the radial direction of the pin shaft 200 is the radial direction of the pin shaft 200, and the axial direction of the pin shaft 200 is the axial direction of the pin shaft 200. The pin shaft protection device 100 is mainly applied to super large excavators, and the structure 300 can be a boom, a stick, a bucket or the like in the super large excavator.

[0048] When assembling the pin shaft protection device 100 in the embodiment, the corresponding size or number of protection pieces 201 can be selected according to the length of the pin shaft 200, at least two protection pieces 201 are sequentially sleeved on the pin shaft 200, the first protection piece 201 can be pressed onto the structure 300 at the bottom after being sleeved on the pin shaft 200, and is sealingly connected with the structure 300, and the subsequent protection pieces 201 are sequentially sleeved according to the remaining length of the pin shaft 200. After the outer side wall of the pin shaft 200 is completely covered by the at least two protection pieces 201, the baffle 10 is connected with the pin shaft 200, so that the baffle 10 and the structure 300 are axially extruded and sealed to the at least two protection pieces 201, the protection pieces 201 are axially fixed relative to the baffle 10 and the structure 300, can abut against the baffle 10, thereby axially limiting the pin shaft 200, avoiding axial movement of the pin shaft 200, without disassembling the pin shaft 200, the human body injury and object damage caused by axial movement of the pin shaft 200 during transportation can be avoided, and the pin shaft 200 can be prevented from being exposed, so that the outer surface of the pin shaft 200 is completely sealed, the risk of erosion by rainwater, oil or other liquids during transportation or storage of the pin shaft 200 in an exposed form is solved, and the pin shaft 200 is completely sealed. The pin shaft 200 is completely sealed, and the risk of erosion by rainwater, oil or other liquids during transportation or storage of the pin shaft 200 in an exposed form is solved. Moreover, the plurality of protection pieces 201 are connected in a detachable manner, the protection pieces 201 can be continuously recycled and utilized, resources are saved, and the device is more environmentally friendly than the plastic winding method. In the embodiment, the baffle 10 and the at least two protection pieces 201 are sealingly matched, the pin shaft 200 can be effectively protected, and the problem of environmental pollution can be avoided.

[0049] As Figures 1 to 3As shown, the at least two protective members 201 include the shield 1 and the adjuster 2, the structural body 300 is provided with a mounting end face 310, the shield 1 is provided with a first protective section 11 completely covering the mounting end face 310; the adjuster 2 is sealed and limited in the axial direction between the shield 1 and the baffle 10, and the shield 1 is provided with a second protective section 12 in sealing cooperation with the adjuster 2. The shield 1 can completely cover the mounting end face 310, and the sealing effect can be guaranteed, and the adjuster 2 and the shield 1 are in sealing cooperation, so that subsequent assembly and disassembly are facilitated. Meanwhile, the pin shaft protection device 100 can be designed into various specifications in actual application, and the adjuster 2 and the shield 1 are made into universal parts, so that installation is more convenient. The first protective section 11 is in a bowl-shaped structure, a cylindrical shape or other shapes. When the types and quantities of the protective members 201 are selected according to the sizes of the pin shafts 200, the size of the shield 1 can be selected as a coarse adjustment reference, and then the sizes and quantities of the adjusters 2 are selected according to the sizes of the remaining pin shafts 200, so that the lengths of the pin shafts 200 can be completely matched after the sealing cooperation between the plurality of protective members 201.

[0050] Specifically, the number of the adjusters 2 is at least two, and the adjuster 2 and the second protective section 12 are both provided with a tail sealing structure 3, and the adjuster 2 is provided with a head sealing structure 4, which is used for sealing and limiting cooperation with the tail sealing structure 3, and makes the protective members 201 sequentially engage and relatively fixed. The tail sealing structure 3 of the adjuster 2 is not provided at the rear end of the adjuster 2 next to the baffle 10, and the tail sealing structure 3 of the adjuster 2 can be sealingly cooperated with the baffle 10 through other sealing structures.

[0051] The tail sealing structure 3 is provided on the adjuster 2 and the second protective section 12 in the embodiment, and the tail sealing structure 3 is the same structure, so that the plurality of adjusters 2 can be universal, and the assembly efficiency between the protective members 201 can be improved. Meanwhile, the mutual engagement between the tail sealing structure 3 and the head sealing structure 4 can relatively fix any two adjacent protective members 201, so that the relative movement between the protective members 201 can be avoided to cause the protection failure, and the protection safety of the pin shaft protection device 100 is further improved.

[0052] As shown in the figure, Figures 5 to 7 The tail sealing structure 3 includes the first protective ring 31 and the second protective ring 32 connected in sequence in the axial direction, the side of the first protective ring 31 facing the second protective ring 32 is provided with a limiting groove 311, the head sealing structure 4 includes a limiting block 41 and a mounting groove 42, the limiting block 41 and the limiting groove 311 are in limiting cooperation in the axial direction and the circumferential direction of the pin shaft 200, and the second protective ring 32 can extend into the mounting groove 42 and be in limiting cooperation with the mounting groove 42 in the radial direction of the pin shaft 200

[0053] The outer side and the rear side of the limiting groove 311 in the embodiment are both provided in an open manner. After the limiting block 41 and the limiting groove 311 are clamped and matched, the outer surface of the limiting block 41 is flush with the slot of the limiting groove 311, and the slot wall of the limiting groove 311 can limit the limiting block 41 in the axial and circumferential directions. In this way, the axial movement of the protection piece 201 is avoided, and the relative rotation between the protection pieces 201 is also avoided, so that the matching gap is changed. In addition, the second protection ring 32 can extend into the mounting groove 42 to realize the nesting structure between the two protection pieces 201, and the sealing performance of the protection piece 201 to the pin shaft 200 can be further improved.

[0054] In some embodiments, as shown in Figure 7 and Figure 8 , the limiting block 41 is arranged at the end of the first protection ring 31 away from the second protection ring 32, the cross-sectional size of the second protection ring 32 is smaller than that of the first protection ring 31, and the mounting groove 42 is arranged on the inner side of the first protection ring 31. In the embodiment, the limiting block 41 is arranged on the front end face of the first protection ring 31, and the mounting groove 42 is arranged on the front end of the first protection ring 31. In the embodiment, the limiting block 41 and the mounting groove 42 are arranged on the first protection ring 31, which can improve the compactness of the regulator 2, make the regulator 2 realize further miniaturization design, and facilitate the matching of the size of the regulator 2 and the pin shaft 200, so that the regulator 2 has higher universality.

[0055] As shown in Figure 5 and Figure 7 , the number of limiting grooves 311 is multiple, the multiple limiting grooves 311 are arranged in a circumferential direction, and a rear limiting face 312 is arranged between any two adjacent limiting grooves 311. The adjusting ring is provided with a front limiting face matched with the rear limiting face 312. The number of limiting grooves 311 and limiting blocks 41 is consistent and one-to-one corresponding. The cooperation between the multiple limiting grooves 311 and the limiting blocks 41 can ensure the stability of the cooperation between the protection pieces 201. In addition, the rear limiting face 312 and the front limiting face are surface-fitted, which can increase the contact area between the protection pieces 201 and further improve the sealing performance.

[0056] Specifically, the limiting groove 311 includes a vertical segment 3111, an avoiding segment 3112 and a horizontal segment 3113 connected in sequence. The horizontal segment 3113 extends in the axial direction, the vertical segment 3111 is perpendicular to the horizontal segment 3113 and is used for surface contact with the limiting block 41, and the avoiding segment 3112 is used for avoiding the limiting block 41. In the embodiment, the avoiding segment 3112 is provided with a chamfer. The chamfer design can avoid the interference between the limiting block 41 and the limiting groove 311, avoid the reduction of the overlapping area between the protection pieces 201, and ensure the stability of the assembly of the protection pieces 201.

[0057] In some embodiments, the pin shaft protection device 100 further comprises a first sealing ring 5 sealed between the tail sealing structure 3 and the head sealing structure 4, and the tail sealing structure 3 is provided with a first sealing groove 321 in sealing cooperation with the first sealing ring 5. In the present embodiment, the first sealing ring 5 is an O-ring, and the first sealing groove 321 is formed in the second protection ring 32. Before the sealing cooperation between the tail sealing structure 3 and the head sealing structure 4, the first sealing ring 5 can be installed in the first sealing groove 321, and the surface of the first sealing ring 5 is pressed by the rear protection member 201, so as to ensure the sealing effect between the two protection members 201.

[0058] As shown in Figure 4 The pin shaft protection device 100 further comprises a second sealing ring 6 sealed between the first protection section 11 and the structure 300, and the end of the first protection section 11 away from the second protection section 12 is provided with a second sealing groove 111 in sealing cooperation with the second sealing ring 6. The inner wall of the first protection section 11 is provided with a weight-reducing groove 112. In the present embodiment, the weight-reducing groove 112 is formed at the front end of the first protection section 11, so as to reduce the weight of the protective cover 1. The first protection section 11 can form the second sealing groove 111 by chamfering. After the assembly of the multiple protection members 201 is completed, the second sealing ring 6 can be installed between the first protection section 11 and the structure 300, so as to avoid the situation that the second sealing ring 6 is extruded or damaged during the assembly of the protection members 201. In addition, the cross-sectional size of the second protection section 12 is smaller than that of the first protection section 11, and the axial length of the adjuster 2 is smaller than that of the protective cover 1. After the size of the protective cover 1 is selected as a rough adjustment reference, the size and number of the adjuster 2 can be selected according to the size of the remaining pin shaft 200, so that the multiple protection members 201 can completely match the length of the pin shaft 200 after the sealing cooperation.

[0059] It should be noted that the outer surface of the protection member 201 is provided with a handrail block 313, and each handrail block 313 is arranged staggered around the circumference of the pin shaft 200. The pin shaft protection device 100 further comprises a positioning ring 7 sealed between the protection member 201 and the baffle 10, and the protection member 201 partially extends into the positioning ring 7 and is limited in cooperation with the positioning ring 7 along the radial direction of the pin shaft 200. During the assembly of the multiple protection members 201, the multiple handrail blocks 313 are installed staggered, so as to facilitate the subsequent disassembly operation of the protection members 201. After the installation of the second sealing ring 6 is completed, the positioning ring 7 can be installed in the sealing groove on the adjuster 2 at the outermost end, and the entire structure is fixed by the stop block. In the present embodiment, the first sealing ring 5, the second sealing ring 6 and the positioning ring 7 can all be rubber sealing members, so as to achieve the sealing effect.

[0060] In an embodiment, the length of the exposed part of the pin shaft 200 relative to the structure 300 can be measured first, and the appropriate size and corresponding number of adjusters 2 and shrouds 1 are selected. The diameter D1 of the shroud 1 matches the pin shaft 200, and D1 is equal to the diameter of the pin shaft 200 that needs to be protected, and a clearance fit tolerance is adopted; the diameter D4 is the diameter of the weight-reducing groove 112. The shroud 1 is provided with four evenly and symmetrically distributed limiting grooves 311 on the outer circumferential surface, which are used to prevent the adjuster 2 from rotating in the circumferential direction; the first sealing groove 321 is provided on the D3 circumferential surface, which is used to assemble the non-hermetic sealing ring and prevent rainwater from seeping into the pin shaft 200 from the assembly gap; the rear limiting surface 312 is tightly mounted with the adjuster 2. D2 needs to be smaller than the outer diameter of the mounting end surface 310 of the matching structure 300, so that the second sealing ring 6 can be fixed. D3 is used to match the adjuster 2; the size of L is determined according to the length of the assembled pin shaft 200 to determine the corresponding size.

[0061] As Figure 4 , the limiting block 41 of the adjuster 2 can be correspondingly mounted with the limiting groove 311 and the limiting groove 311 on the shroud 1, so that the tail sealing structure 3 and the head sealing structure 4 are connected head to tail, and the rotation of the adjuster 2 in the circumferential direction is limited. The handrail block 313 on the adjuster 2 is symmetrically designed at two places, which can be conveniently disassembled. Due to the sealing ring, the contact is relatively tight, and the handrail block 313 can be conveniently and better disassembled. The rear limiting surface 312 is tightly mounted with the other adjuster 2. D6 of the adjuster 2 is both mounted and matched with D7, and also has a matching relationship with the size of D3 of the shroud 1; the size of D5 is related to the diameter of the protected pin shaft 200, and a clearance fit tolerance is adopted; by controlling the length of L1 and L2, multi-stage regulation of the installation distance can be achieved, and the purpose of being suitable for different regions and even multiple models is achieved. The cross-sectional structure of the first sealing ring 5 and the second sealing ring 6 can be circular, rectangular or other shapes. In an embodiment, the installation size of the first sealing ring 5 and the second sealing ring 6 is radially compressed by 3mm.

[0062] After the pin shaft 200 is cleaned, the shroud 1 is assembled on the pin shaft 200 in the axial direction, the contact surface of the shroud 1 and the structure 300 is pressed tightly, and then the first sealing ring 5 is assembled in the first sealing groove 321 at the front end of the shroud 1. After the shroud 1 and the first sealing ring 5 mounted thereon are installed, the adjuster 2, the first sealing ring 5, and the selected adjuster 2 are sequentially installed. When installing the adjuster 2, the handrail block 313 needs to be installed in staggered manner, so that it can be manually disassembled when disassembled.

[0063] The outer diameter of the positioning ring 7 is smaller than the cross-sectional dimension of the baffle 10, and the inner diameter is larger than the shaft diameter of the pin shaft 200. The positioning ring 7 is installed in the first sealing groove 321 of the regulator 2 to achieve the purpose of fixation. The front end of the positioning ring 7 can be provided with a protrusion 71 with an arc angle 72 to facilitate the installation of the positioning ring 7 and prevent the positioning ring 7 from being damaged during installation. After the shroud 1 and the regulator 2 are installed, the second sealing ring 6 is first installed at the contact surface between the shroud 1 and the structure 300, and then the positioning ring 7 is installed on the outermost regulator 2, and the positioning ring 7 is fixed with the first sealing groove 321 of the regulator 2, and finally the entire structure is fixed by bolt connection.

[0064] It should be noted that the internal space of the shroud 1 is designed according to the size of the demand, and can not be left hollow, but can be left cylindrical hollow, etc. The shroud 1 can be cylindrical or other shapes, and the number of limit blocks 41 and limit grooves 311 on the regulator 2 is indefinite.

[0065] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0066] In the present application, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or features of different embodiments or examples described in the present application without contradiction.

[0068] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A pin protection device, wherein a pin (200) extends axially through a structure (300), characterized in that, The pin protection device (100) includes: The baffle (10) is connected to the shaft end of the pin (200), and the baffle (10) and the structure (300) are arranged opposite to each other along the axial direction; A sealing and limiting mechanism (20) is sleeved outside the pin (200) and sealed and limited between the baffle (10) and the structure (300). The sealing and limiting mechanism (20) includes at least two protective members (201), and any two adjacent protective members (201) are detachably and sealed together along the axial direction. At least two of the protective elements (201) include: The protective cover (1) has a mounting end face (310) on the structure (300) and a first protective section (11) that completely covers the mounting end face (310). The regulator (2) is located between the cover (1) and the baffle (10) along the axial direction. The cover (1) is provided with a second protective section (12) that seals with the regulator (2). The number of regulators (2) is at least two, and both the regulators (2) and the second protective section (12) are provided with a tail sealing structure (3). The regulators (2) are provided with a head sealing structure (4). The head sealing structure (4) is used to seal and limit the tail sealing structure (3) and make the protective parts (201) bite and fix each other in sequence. The tail sealing structure (3) includes a first protective ring (31) and a second protective ring (32) connected sequentially along the axial direction. The first protective ring (31) has a limiting groove (311) on the side facing the second protective ring (32). The head sealing structure (4) includes a limiting block (41) and a mounting groove (42). The limiting block (41) and the limiting groove (311) are limited and fitted along the axial and circumferential directions of the pin (200). The second protective ring (32) can extend into the mounting groove (42) and the mounting groove (42) is limited and fitted along the radial direction of the pin (200).

2. The pin protection device according to claim 1, characterized in that, The limiting block (41) is located at the end of the first protective ring (31) away from the second protective ring (32), and the cross-sectional dimension of the second protective ring (32) is smaller than the cross-sectional dimension of the first protective ring (31). The mounting groove (42) is opened on the inner side of the first protective ring (31).

3. The pin protection device according to claim 1, characterized in that, The number of the limiting grooves (311) is multiple, and the multiple limiting grooves (311) are arranged at intervals along the circumference. A rear limiting surface (312) is provided between any two adjacent limiting grooves (311), and the adjuster (2) is provided with a front limiting surface that matches the rear limiting surface (312).

4. The pin protection device according to claim 1, characterized in that, The limiting groove (311) includes a vertical section (3111), a clearance section (3112), and a horizontal section (3113) connected in sequence. The horizontal section (3113) extends along the axial direction. The vertical section (3111) is perpendicular to the horizontal section (3113) and is used to contact the surface of the limiting block (41). The clearance section (3112) is used to avoid the limiting block (41).

5. The pin protection device according to any one of claims 1 to 3, characterized in that, The pin protection device (100) further includes a first sealing ring (5) that seals between the tail sealing structure (3) and the head sealing structure (4), and the tail sealing structure (3) is provided with a first sealing groove (321) that seals with the first sealing ring (5).

6. The pin protection device according to any one of claims 1 to 3, characterized in that, The pin protection device (100) further includes a second sealing ring (6) that seals between the first protection section (11) and the structure (300). The end of the first protection section (11) away from the second protection section (12) is provided with a second sealing groove (111) that seals with the second sealing ring (6). And / or, The inner wall of the first protective section (11) is provided with a weight-reducing groove (112). And / or, The cross-sectional dimension of the second protective section (12) is smaller than that of the first protective section (11), and the axial length of the regulator (2) is smaller than that of the protective cover (1).

7. The pin protection device according to any one of claims 1 to 3, characterized in that, The outer surface of the protective component (201) is provided with handrail blocks (313), and each handrail block (313) is arranged alternately around the pin (200) in the circumferential direction; And / or, The pin protection device (100) further includes a positioning ring (7) sealed between the protective member (201) and the baffle (10), wherein the protective member (201) extends into the positioning ring (7) and is radially limited to the positioning ring (7) along the pin (200).

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