A swivel joint for preventing the winding of a hose of a reel and a reel

Abstract

The utility model relates to rotatable joint technical field, concretely relates to a rotatable joint and pipe winder that prevent pipe winder hose winding. The rotatable joint includes first joint, second joint and the sealing ring between first joint and second joint, and first joint is sleeved in the outer ring of second joint, and the inner wall of first joint is provided with the flange, and the recess that corresponds with the flange is seted up on second joint, and the flange is at least partially engaged in the recess, and first joint and second joint are rotatably connected through the cooperation of flange and recess. The end away from first joint of second joint extends and is provided with the connecting portion, and the connecting portion is fixedly connected with the water pipe. The cooperation of the flange of first joint inner wall and the recess of second joint outer wall, the fixed connection of the end of connecting portion and water pipe can reduce the risk of water pipe winding knot, improve the service life of water pipe and the working efficiency when using water pipe, solve the technical problem that the water pipe is easy to wind knot when using the existing water pipe joint, and the convenience of use is poor.

Description

Technical Field

[0001] This utility model relates to the field of rotatable joint technology, specifically to a rotatable joint and a hose reel that prevent hose tangling. Background Technology

[0002] Water pipe fittings, as key connecting components in fluid transport systems, are widely used in horticulture, cleaning services, and industrial fields. They are primarily used to achieve reliable connections between water pipes and terminal equipment (such as shower heads and water guns), especially in high-frequency movement or high-pressure applications. Traditional water pipe fittings have revealed several technical defects over long-term use: First, when connecting flexible water pipes, the pipes are prone to twisting and knotting during long-distance pulling or frequent movement. The lack of an effective rotation compensation structure at the fitting point prevents free rotation between the pipe and the terminal equipment, resulting in unnecessary torque accumulation and severely impacting ease of use, safety, and durability. Second, when terminal equipment (such as water guns) requires multi-angle adjustments, fixed fittings limit flexibility, forcing users to repeatedly adjust the piping.

[0003] Especially in hose reel applications, traditional connectors cannot adapt to the rotational requirements during hose reeling and unreeling, often resulting in hose tangling and knotting. Tangled hose reduces water flow efficiency, exacerbates fatigue at hose twists, leading to cracking and leaks. Connectors may also loosen or fail to seal due to uneven stress, reducing work efficiency and shortening equipment lifespan. This function is an indispensable necessity in gardening, cleaning services, and industrial sectors. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a rotary joint and hose reel that prevent hose from getting tangled, thus solving the technical problems of water pipes easily getting tangled and knotted and poor ease of use when using existing water pipe joints.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a rotary joint for preventing hose tangling in a hose reel, comprising a first joint, a second joint, and a sealing ring disposed between the first joint and the second joint. The first joint is fitted onto the outer ring of the second joint. A flange is provided on the inner wall of the first joint, and a groove corresponding to the flange is formed on the second joint. The flange is at least partially engaged in the groove. The first joint and the second joint are rotatably connected through the engagement of the flange and the groove. A connecting portion extends from the end of the second joint away from the first joint, and the connecting portion is fixedly connected to a water pipe.

[0007] In one possible implementation, the second connector has an installation groove, in which the sealing ring is installed, and the first connector and the second connector form a seal through the sealing ring.

[0008] In one possible implementation, the outer ring of the first connector is provided with a retaining portion along the circumferential direction.

[0009] In one possible implementation, the connecting portion is provided with a boss in the circumferential direction.

[0010] In one possible implementation, there are multiple bosses, which are evenly arranged along the axial direction of the connecting portion.

[0011] This utility model also provides a hose reel, including a hose reel body, a water pipe housed in the hose reel body, a water gun and the aforementioned rotary joint, wherein the water pipe is fixedly connected to the connecting part and the water gun is detachably connected to the first joint.

[0012] In one possible implementation, the water gun and the first connector are threaded together.

[0013] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model utilizes the cooperation between the inner flange of the first connector and the outer groove of the second connector to form a rotatable axial limiting structure. When the external equipment drives the first connector to rotate, the flange slides along the inner wall of the groove, achieving circumferential rotation without axial displacement. The sealing ring is compressed in the rotation gap, continuously filling any tiny gaps that may occur during dynamic rotation. The connecting part of the second connector forms a fixed connection with the end of the water pipe, ensuring that the water pipe will not twist with the rotation of the first connector, reducing the risk of water output being affected by twisting and knotting. At the same time, it ensures that continuous operation is not disturbed when the water pipe is frequently moved or dragged. In confined spaces (such as corners or behind equipment), the rotating connector can flexibly adjust the angle, thereby reducing the risk of water pipe tangling and knotting, improving the service life of the water pipe and the work efficiency when using the water pipe, and solving the technical problems of water pipes being easily tangled and knotted and having poor ease of use in existing water pipe connectors. Attached Figure Description

[0014] Figure 1 This utility model provides a structural schematic diagram of a rotary joint for preventing hose tangling in a hose reel.

[0015] Figure 2 This is a cross-sectional view of a rotary joint for preventing hose tangling in a hose reel, as provided by this utility model.

[0016] Figure 3 A schematic diagram of another rotary joint for preventing hose tangling in a hose reel provided by this utility model.

[0017] Figure 4 A schematic diagram of a hose reel provided for utility model.

[0018] Attached image labels:

[0019] 1. Rotary joint; 11. First joint; 111. Flange; 112. Holding part; 12. Second joint; 121. Groove; 122. Mounting groove; 13. Sealing ring; 14. Connecting part; 141. Boss; 2. Hose reel; 21. Hose reel body; 22. Water pipe; 23. Water gun. Detailed Implementation

[0020] To solve the above-mentioned technical problems, the present invention provides a solution, and the technical solution and embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "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.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] like Figure 1 and Figure 2As shown, this utility model provides a rotary joint 1 for preventing hose coiling, including a first joint 11, a second joint 12, and a sealing ring 13 disposed between the first joint 11 and the second joint 12. The first joint 11 is fitted onto the outer ring of the second joint 12. A flange 111 is provided on the inner wall of the first joint 11, and a groove 121 corresponding to the flange 111 is provided on the second joint 12. The flange 111 is at least partially engaged in the groove 121. The first joint 11 and the second joint 12 are rotatably connected through the engagement of the flange 111 and the groove 121. A connecting portion 14 is provided at the end of the second joint 12 away from the first joint 11, and the connecting portion 14 is fixedly connected to a water pipe.

[0025] The first connector 11 is a tubular component fitted over the second connector 12. It can be made from an injection-molded plastic shell or machined metal tubing, with an annular protrusion on its inner wall for axial restraint. The second connector 12 is a tubular component nested inside the first connector 11. It can be made from a plastic shell or metal tubing with an annular groove 121, the depth of which is greater than the height of the flange 111 to allow for rotational clearance. The fit between the flange 111 and the groove 121 forms an axially constrained rotating pair, which can be achieved using a semi-circular cross-sectional profile, ensuring axial fixation while allowing circumferential rotation. The sealing ring 13 is an elastic element filling the rotational clearance, which can be a rubber O-ring, compensating for clearance changes caused by rotation through elastic deformation. The connecting part 14 is the water pipe fixing structure at the end of the second connector 12, which can be a tubular extension with a boss 141, achieving a rigid connection with the water pipe via clamps or threads.

[0026] Specifically, the first connector 11 forms a rotatable axial limiting structure through the engagement of its inner wall flange 111 and the outer wall groove 121 of the second connector 12. When an external device drives the first connector 11 to rotate, the flange 111 slides along the inner wall of the groove 121, achieving circumferential rotation without axial displacement. The sealing ring 13 is compressed in the gap of the rotating pair, continuously filling any tiny gaps that may arise during dynamic rotation. The connecting part 14 of the second connector 12 forms a fixed connection with the end of the water pipe through the boss 141 structure, ensuring that the water pipe will not twist as the first connector 11 rotates.

[0027] This design integrates rotation and sealing functions into the connector body structure. The rotation function is achieved through the direct engagement of the flange 111 and the groove 121, while the elastic sealing ring 13 automatically compensates for wear gaps. This integrated design not only reduces the number of parts but also avoids the accumulation of errors caused by assembling multiple components.

[0028] Specifically, the second connector 12 is provided with an installation groove 122, and a sealing ring 13 is installed in the installation groove 122. The first connector 11 and the second connector 12 are sealed by the sealing ring 13.

[0029] The mounting groove 122 refers to the annular groove structure set on the surface of the second connector 12. It can be achieved by turning or injection molding. Its depth and width match the cross-sectional dimensions of the sealing ring 13, and it is used to fix the sealing ring 13 and limit its radial displacement.

[0030] Among them, the sealing ring 13 refers to an annular sealing element with elastic deformation capability. Specifically, it can be made of nitrile rubber or silicone material and is installed in the mounting groove 122 in a pre-compressed state to fill the assembly gap between the first connector 11 and the second connector 12.

[0031] Specifically, when the first connector 11 rotates relative to the second connector 12, the sidewall of the mounting groove 122 exerts an axial constraint on the sealing ring 13, preventing the sealing ring 13 from circumferentially slipping as it rotates. Under pressure, the sealing ring 13 maintains surface contact with the inner wall of the first connector 11, and its elastic deformation compensates for the minute gap changes caused by the connector rotation. The continuous annular structure of the mounting groove 122 ensures that the sealing pressure is evenly distributed circumferentially, avoiding localized stress concentration that could lead to seal failure.

[0032] Compared with existing technologies, traditional water pipe joints rely solely on planar compression to achieve static sealing, which can easily lead to uneven wear or displacement of the sealing element under rotational conditions. This solution, by incorporating an installation groove 122 with sidewall limiting, ensures that the sealing ring 13 maintains a stable compression state and contact area during dynamic rotation, thus resolving the problem of sealing pressure fluctuations caused by rotation.

[0033] In one alternative embodiment, the outer ring of the first connector 11 is provided with a retaining portion 112 along the circumferential direction.

[0034] The retaining part 112 refers to the fixed structure formed around the outer surface of the first connector 11, which is used to increase the friction of the outer surface of the first connector 11 so that the user can complete the installation and disassembly of the first connector 11 and the external equipment by rotating the retaining part 112 to drive the first connector 11 to rotate as a whole.

[0035] Specifically, the retaining part 112 can have anti-slip texture to facilitate manual operation and rotation of the retaining part 112 by the user, or it can have continuous protrusions forming an external hexagonal structure to facilitate quick and convenient rotation of the retaining part 112 by the user using tools.

[0036] In one alternative embodiment, the connecting portion 14 is provided with a boss 141 in the circumferential direction.

[0037] The boss 141 refers to an annular protrusion extending circumferentially along the outer surface of the connecting part 14. It can be achieved by injection molding or machining, and its height and width can be adjusted according to the inner diameter of the water pipe. This structure increases the local support area of ​​the contact surface between the connecting part 14 and the water pipe, forming a multi-point contact mechanical distribution.

[0038] The circumferential arrangement refers to the continuous or intermittent distribution of the bosses 141 along the circumference of the connecting part 14. Specifically, it can be achieved by using evenly spaced independent bosses or continuously surrounding annular ridges. This arrangement ensures that the water pipe is subjected to radially uniform compression during connection, avoiding deformation or slippage caused by unilateral force.

[0039] Specifically, when the water pipe is fitted onto the connector 14, the boss 141 is embedded in the inner wall of the water pipe to form a local interference fit. When subjected to axial tensile force or circumferential torsion, the contact surface between the boss 141 and the water pipe generates distributed frictional resistance, while the sidewall of the boss 141 restricts the axial displacement of the water pipe along the connector 14. The circumferentially distributed bosses 141 ensure that stress is uniformly transmitted along the circumferential direction, eliminating local stress concentration.

[0040] Compared with existing technologies, traditional connecting parts 14, which use smooth surfaces or single annular grooves 121, are prone to circumferential slippage or axial dislodgement of the water pipe under dynamic stress. This solution, through the multi-point contact structure formed by the boss 141, significantly increases the effective friction area of ​​the contact surface under the same assembly pressure. At the same time, the mechanical restraint formed by the side wall of the boss 141 overcomes the problem of uneven stress distribution caused by the single contact surface in traditional structures.

[0041] Furthermore, there are multiple bosses 141, which are evenly arranged along the axial direction of the connecting part 14.

[0042] The axial uniform arrangement refers to the distribution of multiple bosses 141 at equal intervals along the axial direction of the connecting part 14, which can be achieved through mold positioning or machining. This arrangement extends the pressure distribution range to multiple axial positions when the water pipe is connected.

[0043] It should be noted that the specific number of bosses 141 can be selected according to product design requirements. Preferably, in order to form a stable connection between the water pipe and the connecting part 14, there are at least two bosses 141. In addition, the specific pipe diameters of the first connector 11 and the second connector 12 can also be designed according to the diameter of the external equipment and the water pipe.

[0044] Specifically, when the water pipe is fitted onto the connector 14, multiple protrusions 141 sequentially contact the inner wall of the water pipe to form a multi-segment compression seal. Because the protrusions 141 are evenly spaced, the radial pressure on each contact point during the fitting process tends to be consistent, preventing water pipe deformation or seal failure due to excessive local pressure on a single protrusion 141. Under axial tensile or torsional forces, the stepped contact structure formed by the multiple protrusions 141 reduces the risk of loosening by dispersing stress, while the evenly distributed feature ensures that the water pipe maintains pressure balance at each contact point under different bending angles. Furthermore, the evenly distributed protrusions 141 can serve as a positioning reference during assembly, enabling rapid installation through tactile or visual alignment.

[0045] Compared to existing technologies, traditional water pipe joints typically feature only a single boss 141 or a non-uniformly distributed boss 141 structure, resulting in pressure concentration in localized areas. This can easily lead to wear of the sealing ring 13 or water pipe rupture due to stress concentration. This solution disperses pressure to multiple contact areas through multiple axially uniformly distributed bosses 141, significantly improving sealing stability and torsional resistance under the same assembly conditions, while reducing the hardness requirements of the water pipe material.

[0046] This utility model also provides a hose reel 2, including a hose reel 2 body, a water pipe 22 housed in the hose reel 2 body, a water gun 23 and the aforementioned rotary joint 1, the water pipe 22 being fixedly connected to the connecting part 14, and the water gun 23 being detachably connected to the first joint 11.

[0047] The hose reel 2 is a housing structure for housing the water hose 22, which can be implemented using a plastic or metal frame with a winding shaft. An internal rotating mechanism enables automatic retraction and extension of the water hose 22. The rotary joint 1 is a transition component connecting the water hose 22 and the water gun 23, which can be a metal or plastic assembly with a rotating structure. Relative rotation is achieved through the engagement of the internal flange 111 and the groove 121. The connecting part 14 is the area at the end of the second joint 12 used to fix the water hose 22, which can be implemented using a cylindrical structure with a boss 141. It forms a non-detachable connection with the water hose 22 through heat fusion or crimping. The detachable connection refers to the non-fixed assembly method between the water gun 23 and the first joint 11, which can be implemented using a threaded connection structure, allowing for quick separation and reinstallation.

[0048] Specifically, the water pipe 22 is housed inside the hose reel 2 body and arranged in an orderly manner via a winding shaft. When the water gun 23 is pulled, the water pipe 22 is withdrawn from the hose reel 2 body, at which point the rotary joint 1 acts as an intermediate connector to handle water flow transmission. Since the first connector 11 and the second connector 12 are rotatably connected via a flange 111 and a groove 121, both can rotate freely around their axes when the water gun 23 or the water pipe 22 rotates, preventing the water pipe 22 from becoming entangled due to torsion. The connection part 14 is fixedly connected to the water pipe 22 to ensure the water flow channel is sealed, while the detachable structure of the water gun 23 and the first connector 11 allows users to replace the water gun 23 with one of different functions as needed. During rotation, the sealing ring 13 of the rotary joint 1 maintains continuous contact pressure to prevent water leakage.

[0049] In one alternative embodiment, the water gun 23 and the first connector 11 are threaded together.

[0050] The threaded connection refers to the detachable fixing between two components through a threaded connection structure. Specifically, a threaded structure can be provided on the inner wall of the connection end of the water gun 23, and a threaded structure can be provided on the outer ring of the end of the first connector 11. The threaded connection between the water gun 23 and the first connector 11 is achieved through the mutual cooperation of the two threaded structures. The self-locking characteristic of the threaded connection can maintain the connection stability under water pressure fluctuations or external forces.

[0051] Among them, rotational symmetry means that the helical structure of the thread has a uniform contact surface in the circumferential direction. Specifically, it can be achieved through standard thread profile or trapezoidal thread structure, so that the water gun 23 and the first connector 11 form a synchronous rotational relationship when rotating in the circumferential direction.

[0052] Specifically, when the water gun 23 is connected to the first connector 11 via a thread, the rotation of the water gun 23 is directly transmitted to the first connector 11. Since the first connector 11 and the second connector 12 are linked by the rotational connection of the flange 111 and the groove 121, the circumferential rotation of the water gun 23 will drive the first connector 11 to rotate synchronously, and then transmit the rotation to the water pipe 22 through the second connector 12. The axial preload generated by the threaded connection can keep the water gun 23 and the first connector 11 in a tight fit, preventing the connection from loosening due to water pressure fluctuations or external tension. At the same time, the helical contact surface of the thread forms continuous frictional resistance during rotation, further limiting the relative displacement between the water gun 23 and the first connector 11, ensuring that the sealing ring 13 maintains a stable compression during dynamic rotation.

[0053] The above description is merely a preferred embodiment of the present utility model, and the specific embodiments described above are not intended to limit the present utility model. Various modifications and variations can be made within the scope of the technical concept of the present utility model. All refinements, modifications, or equivalent substitutions made by those skilled in the art based on the above description are within the scope of protection of the present utility model.

Claims

1. A rotary joint for preventing hose coiling in hose reels, characterized in that, It includes a first connector, a second connector, and a sealing ring disposed between the first connector and the second connector. The first connector is sleeved on the outer ring of the second connector. A flange is provided on the inner wall of the first connector. A groove corresponding to the flange is provided on the second connector. The flange is at least partially engaged in the groove. The first connector and the second connector are rotatably connected through the cooperation of the flange and the groove. The second connector has a connecting part extending from the end away from the first connector, and the connecting part is fixedly connected to the water pipe.

2. The rotary joint according to claim 1, characterized in that, The second connector has an installation groove, and the sealing ring is installed in the installation groove. The first connector and the second connector are sealed by the sealing ring.

3. The rotary joint according to claim 1, characterized in that, The outer ring of the first connector is provided with a retaining part along the circumferential direction.

4. The rotary joint according to claim 1, characterized in that, The connecting part is provided with a boss in the circumferential direction.

5. The rotary joint according to claim 4, characterized in that, The bosses are multiple in number and are evenly arranged along the axial direction of the connecting part.

6. A hose reel, characterized in that, The device includes a hose reel body, a water pipe housed within the hose reel body, a water gun, and a rotary joint as described in any one of claims 1 to 5, wherein the water pipe is fixedly connected to the connecting portion, and the water gun is detachably connected to the first joint.

7. The tube reel according to claim 6, characterized in that, The water gun and the first connector are threaded together.

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