Multi-directional rotary seal joint for washing machine

Abstract

The utility model belongs to high pressure cleaning equipment accessory technical field, concretely relates to a multi -directional rotation sealing joint for cleaning machine, including connecting part, sealing assembly and fastener, the connecting part includes quick connector, tee main part, tee rotating shaft and two -way rotator, the sealing assembly includes the sealing ring A for reinforcing high pressure sealing performance, the sealing ring B for double dynamic sealing and the sealing ring C for adapting different accessories of anti -pollution, the fastener includes the screw for sealing process hole and the E type clasp spring for quick -release maintenance, quick connector is equipped with standardization quick insertion interface, the inside of sealing ring B is equipped with the dirt flange of preventing. The utility model adopts double sealing ring B cooperation high accuracy cooperation surface (Ra <=0.8mu m) and 0.01~0.03mm oil film gap design, compared with single sealing structure of traditional sealing joint, effectively solve the leakage problem under >10MPa high pressure, reduce the risk of sealing failure, satisfy high pressure cleaning equipment sealing demand.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-pressure cleaning equipment accessories, specifically, it relates to a multi-directional rotary sealing joint for a cleaning machine. Background Technology

[0002] High-pressure washers are high-efficiency cleaning equipment. Their working pressure is usually between 5-30MPa and the water flow speed can reach 10-30m / s. They need to be connected to the main unit and cleaning accessories (such as spray guns, floor brushes, nozzles, etc.) through a rotary joint to achieve flexible adjustment of the cleaning angle.

[0003] Existing rotary joints have many technical defects. While the rotary joint disclosed in patent CN206001162U achieves some basic connection and rotation functions, it still fails to solve the core problems prevalent in the industry: Firstly, the high-pressure seal reliability is insufficient. The patent adopts a single sealing structure design, which is prone to leakage due to the elastic decay of the seal and dynamic friction wear under high pressure conditions of >10MPa. The leakage rate is high and cannot meet the sealing requirements of high-pressure cleaning equipment. Secondly, it has weak anti-pollution capabilities. Its sealing structure is not equipped with effective anti-pollution protection. Particulate matter such as mud, sand and fibers in the water can easily enter the sealing gap, accelerate the wear of the friction pair, and significantly increase the failure rate in complex scenarios such as sewage cleaning. Third, the maintenance is not convenient. The rotating joint connection structure of this patent requires special tools to disassemble and assemble, and the process of replacing the seals is cumbersome and time-consuming, which seriously affects the efficiency of equipment use. Fourth, the accessories have limited compatibility. The output interface size is fixed and cannot be adapted to cleaning accessories of different brands and specifications (such as floor brushes with φ15mm and φ20mm interfaces). Additional adapters are required, which increases the user's cost. Fifth, the service life is relatively short. The friction pair design between the sealing component and the rotating shaft is not optimized, the roughness of the metal contact surface is high, which can easily cause scratches on the seal. Moreover, most of them are integrated sealing structures, and the whole structure needs to be replaced when a single part is worn, which makes it difficult to meet the needs of long-term stable use.

[0004] Therefore, developing a multi-directional rotary sealing joint with strong sealing performance, excellent anti-pollution ability, convenient maintenance, wide compatibility and long service life has become an urgent technical problem to be solved in the field of high-pressure cleaning equipment accessories. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a multi-directional rotary sealing joint for a cleaning machine.

[0006] A multi-directional rotary sealing joint for a cleaning machine, according to this utility model, includes connecting components, sealing components, and fasteners. The connecting components include a quick-connect fitting, a three-way body, a three-way rotating shaft, and a two-way rotating body. The sealing components include a sealing ring A for enhancing high-pressure sealing performance, a sealing ring B for double dynamic sealing and pollution prevention, and a sealing ring C for adapting to different accessories. The fasteners include screws for sealing process holes and E-type retaining rings for quick disassembly and maintenance. The quick-connect fitting has a standardized quick-connect interface. The inner side of the sealing ring B has a dirt-blocking flange.

[0007] In a preferred embodiment, the roughness of the mating surfaces of the tee body and the tee rotating shaft, and the mating surfaces of the tee rotating shaft and the two-way rotating bodies, are all Ra≤0.8μm, and an oil film gap of 0.01~0.03mm is maintained between each mating surface.

[0008] In a preferred embodiment, one end of the quick-connect connector is the standardized quick-connect interface, and the other end is embedded in the input end hole of the tee body through an interference fit, wherein the interference fit surface is coated with silicone grease.

[0009] In a preferred embodiment, the input end of the tee rotating shaft is inserted into the output end hole of the tee body through a shaft hole to form an upper and lower rotating pair, the rotation angle range of the upper and lower rotating pair being 0-90°; the input end of the two-way rotating body is inserted into the output end hole of the tee rotating shaft through a hole-shaft fit to form a left and right rotating pair, the rotation angle range of the left and right rotating pair being 0-90°.

[0010] In a preferred embodiment, a first retaining ring groove is provided on the end side of the input end of the three-way rotary shaft, and the E-type retaining ring is embedded in the first retaining ring groove and fits against the output end face of the three-way body; two independent grooves are provided at the input end of the three-way rotary shaft, and the sealing ring B is embedded in the independent grooves; a first water passage hole is provided in the middle of the input end of the three-way rotary shaft, and the first water passage hole is connected to the quick connector through the three-way body to form an L-shaped water flow channel.

[0011] In a preferred embodiment, a second retaining ring groove is provided on the end side of the input end of the two-way rotating body, and the E-type retaining ring is embedded in the second retaining ring groove and fits against the output end face of the three-way rotating shaft; the input end of the two-way rotating body has two independent grooves, and the sealing ring B is embedded in the independent grooves; a second water passage hole is provided in the middle of the input end of the two-way rotating body, and the second water passage hole communicates with the inner cavity of the three-way rotating shaft to form an L-shaped water flow channel.

[0012] In a preferred embodiment, process holes are provided at the ends of the two-way rotating body input end, the ends of the three-way rotating shaft input end, and the middle of the three-way rotating shaft; the screw and the sealing ring A cooperate to seal the process holes, and the sealing ring A is a rubber O-ring embedded in the annular groove of the screw head.

[0013] In a preferred embodiment, the sealing ring B is made of fluororubber with a temperature resistance range of 20℃-180℃; the height of the dirt-blocking flange is 0.1~0.3mm.

[0014] In a preferred embodiment, the sealing ring C is embedded in the annular groove of the output end of the two-way rotating body, and the sealing ring C is made of fluororubber; under high pollution conditions, the outer side of the sealing ring C is coated with PTFE.

[0015] In a preferred embodiment, the E-type retaining ring forms a quick-release structure, allowing for manual assembly and disassembly of the rotating joint.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model adopts a double sealing ring B with a high-precision mating surface (Ra≤0.8μm) and an oil film gap of 0.01~0.03mm. Compared with the single sealing structure of traditional sealing joints, it effectively solves the leakage problem under high pressure >10MPa, reduces the risk of sealing failure, and meets the sealing requirements of high-pressure cleaning equipment.

[0017] 2. The sealing ring B of this utility model has a 0.1-0.3mm dirt-blocking flange on the inner side, which can prevent particles such as mud, sand and fibers in the water from entering the sealing gap, avoid accelerated wear of the friction pair, improve the problem of weak anti-pollution of traditional sealing joints, and reduce the failure rate in sewage cleaning scenarios.

[0018] 3. This utility model uses an E-type snap ring to form a quick-release structure, which allows for manual disassembly and assembly of the rotating joint. Individual sealing components can be replaced individually when worn, without the need for special tools. This solves the problem of cumbersome and time-consuming disassembly and assembly of traditional sealing joints, shortens maintenance time, and improves equipment efficiency.

[0019] 4. This utility model uses a standardized quick-connect interface with a quick-connect fitting. The sealing ring C is compatible with accessories of different specifications. It can connect to cleaning accessories of different brands and different interface sizes (such as φ15mm and φ20mm) without the need for additional adapters. This solves the problems of fixed interface and poor compatibility of traditional sealing connectors and reduces the cost of use.

[0020] 5. The sealing component of this utility model is made of fluororubber material with a temperature resistance of 20℃-180℃. Under high pollution conditions, the sealing ring C can also be coated with PTFE. With the optimized friction pair design, the scratches on the sealing parts are reduced, and the problem of needing to replace the whole structure is avoided. Compared with traditional sealing joints, the product life is significantly extended. Attached Figure Description

[0021] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the present invention during assembly; Figure 4 This is a cross-sectional view of the two-way rotating body of this utility model; Figure 5 This is a cross-sectional view of the main body of the tee of this utility model; Figure 6 This is a structural schematic diagram of the three-way rotating shaft of this utility model in its limit rotation state; Figure 7 This is a structural schematic diagram of the three-way body of this utility model in its extreme rotation state; Figure 8 This is a schematic diagram of the structure of the input end of the three-way rotary shaft of this utility model; Figure 9 This is a schematic diagram of the structure of the input end of the two-way rotating body of this utility model.

[0022] The following are the labeling elements in the figure: 1. Quick-connect fitting; 2. Screw; 3. Sealing ring A; 4. Type E snap ring; 5. T-shaped body; 6. Sealing ring B; 7. T-shaped rotating shaft; 8. Two-way rotating body; 9. Sealing ring C. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] This utility model discloses a multi-directional rotary sealing joint for a cleaning machine, including connecting parts, sealing components and fasteners. The connecting parts include a quick-connect fitting 1, a three-way body 5, a three-way rotating shaft 7 and a two-way rotating body 8. The sealing components include sealing rings A3, B6 and C9. The fasteners include screws 2 and E-type retaining rings 4.

[0025] One end of the quick-connect connector 1 is equipped with a standardized quick-connect interface, and the other end of the quick-connect connector 1 is inserted into the input end hole of the tee body 5 through an interference fit to achieve quick docking with the main unit of the high-pressure cleaner; the interference fit surface is coated with silicone grease, which not only enhances the sealing performance, but also facilitates separation and disassembly during later maintenance.

[0026] The input end of the tee rotating shaft 7 is inserted into the output end hole of the tee body 5 through the shaft hole to form an upper and lower rotating pair. The rotation angle range of the upper and lower rotating pair is 0-90°. The roughness Ra of the shaft hole mating surface of the output end hole of the tee body 5 is Ra≤0.8μm, forming a high-gloss metal sealing pair. An oil film gap of 0.01~0.03mm is retained between the mating surfaces, which reduces friction and wear and enhances the sealing performance under high pressure.

[0027] A first retaining ring groove is formed on the side of the input end of the three-way rotating shaft 7. An E-type retaining ring 4 is embedded in the first retaining ring groove, which fits against the end face of the output end of the three-way body 5. This allows the three-way rotating shaft 7 to be axially limited with the three-way body 5 through the E-type retaining ring 4, restricting the axial displacement of the three-way rotating shaft 7 along the output end hole of the three-way body 5, while allowing the three-way rotating shaft 7 to rotate radially along the output end hole of the three-way body 5. Two independent grooves are also formed on the input end of the three-way rotating shaft 7. The independent grooves are used to embed the sealing ring B6, thereby forming a double dynamic seal between the input end of the three-way rotating shaft 7 and the output end of the three-way body 5. A first water passage hole is formed in the middle of the input end of the three-way rotating shaft 7. The three-way rotating shaft 7 is connected to the quick connector 1 through the first water passage hole via the three-way body 5, forming an L-shaped water flow channel.

[0028] The input end of the two-way rotating body 8 is inserted into the output end hole of the three-way rotating shaft 7 through a hole-shaft fit, forming a left-right rotating pair with a rotation angle range of 0-90°. The roughness Ra of the shaft-hole mating surface of the output end hole of the three-way rotating shaft 7 is ≤0.8μm, forming a high-gloss metal sealing pair. An oil film gap of 0.01-0.03mm is maintained between the mating surfaces, which reduces friction and wear and enhances the sealing performance under high pressure.

[0029] A second snap ring groove is provided on the side of the input end of the two-way rotating body 8. An E-type snap ring 4 is embedded in the second snap ring groove, which fits against the end face of the output end of the three-way rotating shaft 7. This allows the two-way rotating body 8 to be axially limited with the three-way rotating shaft 75 through the E-type snap ring 4, restricting the axial displacement of the two-way rotating body 8 along the output end hole of the three-way rotating shaft 7, while allowing the two-way rotating body 8 to rotate radially along the output end hole of the three-way body 5. Two independent grooves are also provided on the input end of the two-way rotating body 8. The independent grooves are used to embed the sealing ring B6, thereby forming a double dynamic seal between the input end of the two-way rotating body 8 and the output end of the three-way rotating shaft 7. A second water passage hole is provided in the middle of the input end of the two-way rotating body 8. The two-way rotating body 8 communicates with the inner cavity of the three-way rotating shaft 7 through the second water passage hole, forming an L-shaped water flow channel.

[0030] Process holes are provided at the ends of the two-way rotating body 8, the ends of the three-way rotating shaft 7, and the middle of the three-way rotating shaft 7. The process holes are used for tool retraction when machining the internal channel. The process holes are sealed by screw 2 and sealing ring A3. Sealing ring A3 is a rubber O-ring. Sealing ring A3 is embedded in the annular groove of the screw head. Static sealing is achieved by screw pre-tightening force to prevent water from leaking from the process holes.

[0031] The sealing ring B6 is made of fluororubber with a temperature range of 20℃-180℃. The inner side of the sealing ring B6 has a dirt-blocking flange with a height of 0.1~0.3mm to prevent water particles from entering the friction pair. The sealing ring C9 is embedded in the annular groove of the output end of the two-way rotating body 8. The sealing ring C9 is made of fluororubber. When working in highly polluted conditions, a PTFE coating can be applied to the outer side of the fluororubber.

[0032] Working principle When this utility model is in use, high-pressure water enters from the quick-connect connector 1, is transported through the L-shaped channel of the three-way body 5 to the inner hole of the three-way rotating shaft 7, and is then output to the cleaning accessories through the channel of the two-way rotating body 8.

[0033] The rotation function is achieved through two sets of rotating pairs: the tee rotating shaft 7 and the shaft hole of the tee body 5 allow the connector to swing up and down to adjust the pitch angle, and the two-way rotating body 8 and the hole shaft of the tee rotating shaft 7 allow the connector to rotate left and right to adjust the horizontal angle. The two work together to achieve multi-directional angle adjustment.

[0034] The sealing function is achieved through three layers of protection: the sealing ring B6 forms a double seal on the dynamic friction surface of the rotating pair, and works in conjunction with the micro-gap seal of the high-gloss metal surface to prevent high-pressure water from leaking from the rotating surface; the sealing ring A3 and the screw 2 seal the process hole to prevent static leakage; the sealing ring C9 forms an adaptive seal on the mating surface between the output end and the external accessories to compensate for interface size errors and ensure sealing during insertion and removal.

[0035] In addition, the quick-release structure of the E-type retaining ring 4 allows for manual disassembly and assembly of the rotating pair, facilitating the replacement of the sealing ring B6; the labyrinth-type dirt-blocking flange reduces wear on the sealing surface by particles, extending service life.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A multi-directional rotary sealing joint for a cleaning machine, characterized in that, It includes connecting components, sealing components, and fasteners; the connecting components include a quick-connect connector (1), a tee body (5), a tee rotating shaft (7), and a two-way rotating body (8); the sealing components include a sealing ring A (3) for enhancing high-pressure sealing performance, a sealing ring B (6) for double dynamic sealing and pollution prevention, and a sealing ring C (9) for adapting to different accessories; the fasteners include screws (2) for sealing process holes and E-type retaining rings (4) for quick-release maintenance; the quick-connect connector (1) is provided with a standardized quick-connect interface; the inner side of the sealing ring B (6) is provided with a dirt-blocking flange.

2. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, The roughness of the mating surfaces of the three-way body (5) and the three-way rotating shaft (7), and the mating surfaces of the three-way rotating shaft (7) and the two-way rotating body (8) are all Ra≤0.8μm, and each mating surface retains an oil film gap of 0.01~0.03mm.

3. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, One end of the quick-connect connector (1) is the standardized quick-connect interface, and the other end is embedded in the input end hole of the tee body (5) through an interference fit. The interference fit surface is coated with silicone grease.

4. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, The input end of the three-way rotating shaft (7) is inserted into the output end hole of the three-way body (5) through the shaft hole to form an upper and lower rotating pair. The rotation angle range of the upper and lower rotating pair is 0-90°. The input end of the two-way rotating body (8) is inserted into the output end hole of the three-way rotating shaft (7) through the hole shaft to form a left and right rotating pair. The rotation angle range of the left and right rotating pair is 0-90°.

5. The multi-directional rotary sealing joint for a cleaning machine according to claim 4, characterized in that, The input end of the three-way rotating shaft (7) has a first retaining ring groove on its side. The E-type retaining ring (4) is embedded in the first retaining ring groove and fits against the output end face of the three-way body (5). The input end of the three-way rotating shaft (7) has two independent grooves. The sealing ring B (6) is embedded in the independent grooves. The middle part of the input end of the three-way rotating shaft (7) has a first water passage hole. The first water passage hole is connected to the quick connector (1) through the three-way body (5) to form an L-shaped water flow channel.

6. The multi-directional rotary sealing joint for a cleaning machine according to claim 4, characterized in that, The input end of the two-way rotating body (8) has a second snap ring groove on its side. The E-type snap ring (4) is embedded in the second snap ring groove and fits against the output end face of the three-way rotating shaft (7). The input end of the two-way rotating body (8) has two independent grooves. The sealing ring B (6) is embedded in the independent grooves. The middle part of the input end of the two-way rotating body (8) has a second water passage hole. The second water passage hole is connected to the inner cavity of the three-way rotating shaft (7) to form an L-shaped water flow channel.

7. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, Process holes are provided at the end of the input end of the two-way rotating body (8), the end of the input end of the three-way rotating shaft (7), and the middle part of the three-way rotating shaft (7); the screw (2) and the sealing ring A (3) cooperate to seal the process holes, and the sealing ring A (3) is a rubber O-ring and is embedded in the annular groove of the screw head.

8. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, The sealing ring B (6) is made of fluororubber and its temperature resistance range is 20℃-180℃; the height of the dirt-blocking flange is 0.1~0.3mm.

9. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, The sealing ring C (9) is embedded in the annular groove at the output end of the two-way rotating body (8). The sealing ring C (9) is made of fluororubber. Under high pollution conditions, the outer side of the sealing ring C (9) is coated with PTFE.

10. The multi-directional rotary sealing joint for a cleaning machine according to claim 1, characterized in that, The E-type snap ring (4) forms a quick-release structure, allowing for manual disassembly and assembly of the rotating pair.

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