A blade rotary sealing structure and a grader

Abstract

This application provides a rotary sealing structure for a scraper blade and a grader. The rotary sealing structure includes a drawbar, a rotary ring, a scraper blade support, and a scraper blade. The rotary ring is rotatably mounted on the drawbar. The scraper blade support is connected to the rotary ring and can rotate relative to it. The scraper blade is mounted on the scraper blade support. A seal is provided between the rotary ring and the drawbar. At least one of the drawbar and the rotary ring has an inspection hole that exposes at least part of the seal for replacement. When the seal between the rotary ring and the drawbar is damaged due to wear and needs replacement, the operator can access the seal through the inspection hole in the drawbar and the rotary ring. By rotating the rotary ring, the operator can disassemble and install the seal. Replacing the seal does not require disassembling the entire rotary sealing structure, saving time and effort and improving the efficiency of seal replacement.

Description

Technical Field

[0001] This application relates to the field of road machinery technology, specifically to a blade rotary sealing structure and a grader. Background Technology

[0002] A grader is an earthmoving machine that uses a blade to level the ground. The blade is mounted between the front and rear axles and can be raised, lowered, tilted, rotated, and extended. It is flexible and accurate in its movements, easy to operate, and provides high precision in leveling the ground. It is suitable for constructing roadbeds and pavements, building slopes, excavating ditches, mixing road mixtures, clearing snow, pushing loose materials, and maintaining dirt roads and gravel roads.

[0003] Typically, grader blade turntables use a slewing bearing structure. Mud, sand, dust, and other debris fall through the gap between the traction frame and the slewing ring into the gap between the slewing ring and the slewing bearing. Once accumulated, they cannot flow out, and over time, this accumulation may damage the dustproof seals of the slewing bearing. In existing technologies, replacing the seals requires disassembling the entire sealing structure, which is time-consuming, labor-intensive, and inefficient. Utility Model Content

[0004] In view of this, this application provides a blade rotary sealing structure, which at least solves the problems of time-consuming, labor-intensive, and inefficient replacement of seals in blade rotary sealing structures. This application also provides a grader including the above-mentioned blade rotary sealing structure.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A rotary sealing structure for a shovel blade includes a traction frame, a rotary ring, a shovel blade support, and a shovel blade. The rotary ring is rotatably mounted on the traction frame. The shovel blade support is connected to the rotary ring and can rotate relative to the rotary ring. The shovel blade is mounted on the shovel blade support.

[0007] A seal is provided between the slewing ring and the traction frame, and an inspection hole is provided in at least one of the traction frame and the slewing ring, the inspection hole enabling at least a portion of the seal to be exposed so as to allow for the replacement of the seal.

[0008] Optionally, the inspection hole is provided on the traction frame, and the axial direction of the inspection hole is perpendicular to the plane where the seal is located.

[0009] Optionally, the blade rotary sealing structure further includes a cover plate capable of sealing the inspection hole, the cover plate being detachably connected to the rotary ring.

[0010] Optionally, the seal includes an integrally formed first sealing part and a second sealing part, the first sealing part abutting against the traction frame, the second sealing part abutting against the rotary ring, and at least two first sealing parts are provided.

[0011] Optionally, the seal has a Y-shaped cross-section.

[0012] Optionally, the seal is an annular structure, and the rotating ring has an annular groove to accommodate the second sealing part.

[0013] Optionally, the second sealing portion is provided with annular protrusions on its circumferential outer side and / or circumferential inner side that can abut against the inner wall of the annular groove.

[0014] Optionally, the seal is an elastic sealing structure.

[0015] Optionally, one side of the cover plate is rotatably connected to the rotary ring, and a handle is provided on the side of the cover plate opposite to the seal.

[0016] A grader includes a front frame and a rear frame, the grader further includes the blade rotation sealing structure described in any of the above claims, the front end of the tow frame is hinged to the front end of the front frame, and the rear end of the tow frame is connected to the rear end of the front frame.

[0017] The rotary sealing structure for the blade provided in this application features an inspection hole in at least one of the drawbar and the rotary ring. This inspection hole allows at least partial exposure of the seal, facilitating seal replacement. When the grader has been operating for an extended period and the seal between the rotary ring and the drawbar becomes worn and requires replacement, the operator can access the seal through the inspection hole in both the drawbar and the rotary ring. By rotating the rotary ring, the operator can easily disassemble and install the seal. This design eliminates the need to disassemble the entire rotary sealing structure for seal replacement; the seal can be conveniently replaced through the inspection hole, saving time and effort and improving seal replacement efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application 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 only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the rotary sealing structure for the shovel provided in this embodiment;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 This is an enlarged cross-sectional view of the seal;

[0022] Figure 4 This is a schematic diagram of the traction frame structure;

[0023] Figure 5 The access port was not covered. Figure 4 Enlarged view at point B in the middle;

[0024] Figure 6 Install a cover for the access port Figure 4 Enlarged view of section B in the middle.

[0025] exist Figures 1 to 6 middle:

[0026] 1-Traction frame, 2-Slewing ring, 3-Shovel support, 4-Seal, 5-Inspection hole, 6-Cover plate;

[0027] 21-Annular groove, 41-First sealing part, 42-Second sealing part, 43-Annular protrusion. Detailed Implementation

[0028] This application provides a rotary blade sealing structure, which at least solves the problems of time-consuming, labor-intensive, and inefficient replacement of seals in rotary blade sealing structures. This application also provides a grader including the above-mentioned rotary blade sealing structure.

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] like Figures 1 to 6As shown, this application embodiment provides a blade rotary sealing structure, which is a component of a grader. The blade rotary sealing structure mainly includes a traction frame 1, a rotary ring 2, a blade support 3, and a blade. The rotary ring 2 is rotatably mounted on the traction frame 1. The blade support 3 is connected to the rotary ring 2 and can rotate relative to the rotary ring 2. The blade is mounted on the blade support 3. A sealing element 4 is provided between the rotary ring 2 and the traction frame 1 to achieve a seal between the rotary ring 2 and the traction frame 1, preventing mud, sand, dust, etc., from falling into the gap between the rotary ring 2 and the rotary support when the rotary ring 2 rotates relative to the traction frame 1. An inspection hole 5 is provided in at least one of the traction frame 1 and the rotary ring 2, and the inspection hole 5 allows at least a partial exposure of the sealing element 4. Thus, when it is necessary to replace the sealing element 4 located between the traction frame 1 and the rotary ring 2, the operator can remove the exposed portion of the sealing element 4 through the inspection hole 5. Simultaneously, the rotating ring 2 is rotated to continuously remove the remaining portion of the seal 4 as it rotates relative to the access hole 5, until all of the seal 4 is removed, thus efficiently removing the seal 4 to be replaced. Then, a portion of the new seal 4 is installed between the rotating ring 2 and the traction frame 1 through the access hole 5. The rotating ring 2 is then rotated, continuously pushing the remaining portion of the new seal 4 into the installation position between the traction frame 1 and the rotating ring 2, until all of the new seal 4 is inserted between the traction frame 1 and the rotating ring 2, thus completing the installation of the new seal 4. This setup facilitates the replacement of the seal 4 and improves the efficiency of seal replacement.

[0031] It should be noted that providing an inspection hole 5 in at least one of the traction frame 1 and the slewing ring 2 includes the following embodiments: providing an inspection hole 5 only in the traction frame 1, providing an inspection hole 5 only in the slewing ring 2, or providing an inspection hole 5 in both the traction frame 1 and the slewing ring 2.

[0032] The blade rotary sealing structure described above features an inspection hole 5 in at least one of the traction frame 1 and the rotary ring 2. This inspection hole 5 exposes at least a portion of the seal 4, facilitating its replacement. Thus, when the seal 4 between the rotary ring 2 and the traction frame 1 becomes worn and requires replacement after prolonged use of the grader, the operator can access it through the inspection hole 5. By rotating the rotary ring 2, the operator can easily disassemble and install the seal 4. This design eliminates the need to disassemble the entire blade rotary sealing structure for seal 4 replacement; replacement can be conveniently achieved through the inspection hole 5, saving time and effort and improving the efficiency of seal 4 replacement.

[0033] When replacing the seal 4 through the inspection hole 5, the seal 4 needs to be removed by rotating the rotary ring 2, while the rotary ring 2 rotates and the traction frame 1 remains stationary. Therefore, in some embodiments, please refer to... Figure 4 and Figure 5 The inspection hole 5 is located on the traction frame 1, allowing the operator to easily replace the seal 4 without moving it, thus reducing the difficulty of replacing the seal 4. Furthermore, the axis of the inspection hole 5 is perpendicular to the plane containing the seal 4. This design reduces the distance between the opening of the inspection hole 5 and the seal 4, making it easier for the operator to replace the seal 4.

[0034] For example, the axial direction of inspection hole 5 refers to Figure 4 The direction indicated by the double-headed arrow Z.

[0035] Of course, the axial direction of the inspection hole 5 can also be set at an angle relative to the plane where the seal 4 is located, so that the operator can also replace the seal 4 through the inspection hole 5.

[0036] In some embodiments, please refer to Figure 6 The rotary sealing structure of the blade also includes a cover plate 6 that can seal the inspection hole 5. The cover plate 6 is detachably connected to the rotary ring 2. Specifically, when the seal 4 needs to be replaced, the cover plate 6 on the inspection hole 5 is opened to expose part of the seal 4 in the inspection hole 5, and then the operator replaces the seal 4 through the inspection hole 5. After the seal 4 is replaced, the cover plate 6 is installed on the rotary ring 2 to seal the inspection hole 5. Since there are many impurities such as mud and dust in the working environment of the grader, these impurities can easily enter the location of the seal 4 through the inspection hole 5. The cover plate 6 that seals the inspection hole 5 can prevent mud, dust and other impurities from entering the inspection hole 5, thereby achieving sealing and protection of the seal 4.

[0037] It should be noted that the method of detachable connection between cover plate 6 and rotating ring 2 is not limited here. Cover plate 6 and rotating ring 2 can be connected by bolts, snap-fit, magnetic attraction or a combination thereof.

[0038] In some embodiments, please refer to Figure 2 and Figure 3 The sealing element 4 includes an integrally formed first sealing part 41 and a second sealing part 42. The first sealing part 41 abuts against the traction frame 1, and the second sealing part 42 abuts against the rotating ring 2. This arrangement can improve the sealing effect of the sealing element 4 on the sealing between the traction frame 1 and the rotating ring 2. Furthermore, the integral forming of the first sealing part 41 and the second sealing part 42 can improve the connection strength between the first sealing part 41 and the second sealing part 42, further improving the sealing effect of the sealing element 4 on the gap between the traction frame 1 and the rotating ring 2.

[0039] Furthermore, at least two first sealing portions 41 are provided, meaning that the seal 4 between the traction frame 1 and the rotating ring 2 seals the gap between them at least twice. Thus, during the rotation of the rotating ring 2 relative to the traction frame 1, the relative rotation between the rotating ring 2 and the traction frame 1 causes wear on the seal 4. Since the seal 4 includes at least two first sealing portions 41 that abut against the traction frame 1, when one of the first sealing portions 41 is damaged due to wear, the other first sealing portion 41 can still provide a seal. This arrangement improves the sealing effect of the seal 4 on the gap between the traction frame 1 and the rotating ring 2, further preventing impurities such as mud and dust from falling into the gap between the rotating ring 2 and the slewing bearing through the gap between the traction frame 1 and the rotating ring 2.

[0040] It should be noted that the first sealing part 41 can be set in two, three, four, etc. The more first sealing parts 41 are set, the better the sealing effect between the traction frame 1 and the rotating ring 2 will be achieved by the sealing element 4.

[0041] In some embodiments, please refer to Figure 3 The seal 4 has a Y-shaped cross-section. That is, one end of the lower part of the Y-shape of the seal 4 abuts against the rotating ring 2, and both ends of the upper part of the Y-shape of the seal 4 abut against the traction frame 1. This arrangement can improve the sealing effect of the seal 4 in sealing the gap between the rotating ring 2 and the traction frame 1, and can also improve the stability of the seal 4.

[0042] In addition, the cross-sectional shape of the seal 4 can also be other shapes, such as T-shaped, W-shaped, U-shaped, V-shaped, L-shaped, M-shaped, etc.

[0043] In some embodiments, please refer to Figure 2 and Figure 3 The seal 4 has an annular structure, and the rotating ring 2 has an annular groove 21 to accommodate the second sealing part 42. By opening the annular groove 21 on the rotating ring 2, and with the second sealing part 42 of the seal 4 located within the annular groove 21, the second sealing part 42 of the seal 4 and the annular groove 21 are press-fitted. The annular groove 21 can limit the position of the seal 4, thereby limiting the position of the seal 4 when the rotating ring 2 rotates relative to the traction frame 1, so as to prevent the seal 4 from shifting and improve the stability of the seal 4 structure.

[0044] In some embodiments, please refer to Figure 3The second sealing part 42 is provided with annular protrusions 43 on its outer and / or inner circumferential sides, which can abut against the inner wall of the annular groove 21. By providing the above-mentioned annular protrusions 43, the stability of the interference fit between the second sealing part 42 and the annular groove 21 can be improved, thereby improving the sealing effect of the sealing member 4 on the gap between the traction frame 1 and the rotating ring 2.

[0045] Furthermore, based on the above embodiment, at least two annular protrusions 43 are provided on the outer circumferential side of the second sealing part 42, and the at least two annular protrusions 43 are equally spaced in the axial direction of the second sealing part 42; correspondingly, at least two annular protrusions 43 are provided on the inner circumferential side of the second sealing part 42, and the at least two annular protrusions 43 are equally spaced in the axial direction of the second sealing part 42. This arrangement further improves the stability of the interference fit between the second sealing part 42 and the annular groove 21, thereby further improving the sealing effect of the sealing element 4 on the gap between the traction frame 1 and the rotating ring 2.

[0046] In some embodiments, the seal 4 is an elastic sealing structure. For example, the seal 4 can be: NBR nitrile rubber, EPDM ethylene propylene diene monomer (EPDM), CR chloroprene rubber, FKM fluororubber, HNBR hydrogenated nitrile rubber, SIL silicone rubber, FLS fluorosilicone rubber, PTFE polytetrafluoroethylene, or PU polyurethane. This configuration allows the seal 4 itself to achieve an elastic sealing effect, resulting in a simple structure and significant effect.

[0047] In addition, the seal 4 can also be a rigid structure, and an elastic element can be provided between the seal 4 and the rotating ring 2, and / or an elastic element can be provided between the seal 4 and the traction frame 1. Such a configuration can also enable the seal 4 to seal the gap between the traction frame 1 and the rotating ring 2.

[0048] In some embodiments, one side of the cover plate 6 is rotatably connected to the rotating ring 2. Thus, when the sealing ring needs to be replaced, the cover plate 6 is flipped relative to the rotating ring 2 to release the seal of the cover plate 6 on the access hole 5. After the sealing ring is replaced, the cover plate 6 is rotated in the opposite direction relative to the rotating ring 2 to seal the access hole 5. This configuration allows the cover plate 6 to conveniently seal and release the seal on the access hole 5, improving the ease of adjustment of the cover plate 6. Furthermore, a handle (not shown in the figure) is provided on the side of the cover plate 6 opposite to the sealing element 4. This design allows the operator to hold the cover plate 6 and operate it to flip, thereby improving the ease of flipping the cover plate 6.

[0049] This application also provides a grader including a front frame, a rear frame, and the aforementioned blade rotary sealing structure. The front end of the tow frame 1 is hinged to the front end of the front frame, and the rear end of the tow frame 1 is connected to the rear end of the front frame. The grader includes a blade rotary sealing structure, which provides an inspection hole 5 in at least one of the tow frame 1 and the rotary ring 2. The inspection hole 5 allows at least partial exposure of the seal 4, enabling replacement of the seal 4. Thus, when the seal 4 between the rotary ring 2 and the tow frame 1 is worn and needs replacement after prolonged operation, the operator can access the seal 4 through the inspection hole 5 in the tow frame 1 and the rotary ring 2. By rotating the rotary ring 2, the operator can disassemble and install the seal 4. With this design, when replacing seal 4, it is not necessary to disassemble the entire rotary sealing structure of the scraper. The seal ring can be easily replaced through the inspection hole 5, saving time and effort and improving the replacement efficiency of seal 4.

[0050] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0051] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0052] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0053] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0054] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A rotary sealing structure for a shovel blade, comprising a traction frame, a rotary ring, a shovel blade support, and a shovel blade, wherein the rotary ring is rotatably mounted on the traction frame; the shovel blade support is connected to the rotary ring and is capable of rotating relative to the rotary ring; and the shovel blade is mounted on the shovel blade support, characterized in that: A seal is provided between the slewing ring and the traction frame, and an inspection hole is provided in at least one of the traction frame and the slewing ring, the inspection hole enabling at least a portion of the seal to be exposed so as to allow for the replacement of the seal.

2. The rotary sealing structure for the shovel according to claim 1, characterized in that, The inspection hole is provided on the traction frame, and the axial direction of the inspection hole is perpendicular to the plane where the seal is located.

3. The rotary sealing structure for the shovel according to claim 2, characterized in that, It also includes a cover plate capable of sealing the access hole, the cover plate being detachably connected to the rotary ring.

4. The rotary sealing structure for the shovel blade according to claim 1, characterized in that, The sealing element includes an integrally formed first sealing part and a second sealing part. The first sealing part abuts against the traction frame, and the second sealing part abuts against the rotary ring. At least two first sealing parts are provided.

5. The rotary sealing structure for the shovel according to claim 4, characterized in that, The seal has a Y-shaped cross-section.

6. The rotary sealing structure for the shovel according to claim 4, characterized in that, The sealing element has an annular structure, and the rotating ring has an annular groove to accommodate the second sealing part.

7. The rotary sealing structure for the shovel according to claim 6, characterized in that, The second sealing part is provided with annular protrusions on its circumferential outer side and / or circumferential inner side, which can abut against the inner wall of the annular groove.

8. The rotary sealing structure for the shovel blade according to claim 1, characterized in that, The sealing element is an elastic sealing structure.

9. The rotary sealing structure for the shovel according to claim 3, characterized in that, One side of the cover plate is rotatably connected to the rotary ring, and a handle is provided on the side of the cover plate opposite to the seal.

10. A grader, comprising a front frame and a rear frame, characterized in that, It also includes a blade rotary sealing structure as described in any one of claims 1-9, wherein the front end of the towing frame is hinged to the front end of the front frame, and the rear end of the towing frame is connected to the rear end of the front frame.

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