Connector assembly

Abstract

The invention discloses a connector assembly. The technical problem that an existing connector is prone to loosening after being vibrated for a long time is solved. The connector comprises a first connector, a second connector, a jacket nut and a sealing ring. The second connector is in sliding fit with the first connector, and the sealing ring is arranged between the first connector and the second connector. The first end of the outer sleeve nut is in threaded fit connection with the second connector, and the second end, opposite to the first end, of the outer sleeve nut is connected with the first connector to limit the moving range of the first connector relative to the outer sleeve nut in the axial direction of the outer sleeve nut. According to the connector assembly, the first connector is inserted into the second connector, the sealing ring assembly and the first connector can limit the second connector from the interior of the second connector, vibration borne by the second connector is weakened, the second connector is sleeved with the outer sleeve nut, and the outer sleeve nut can limit the second connector from the exterior of the second connector; therefore, the second connector is not prone to loosening when vibrated in the working process, and sealing leakage is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of hydraulic sealing, and specifically relates to a joint assembly. Background Art

[0002] Hydraulic threaded joints are used in ship hydraulic pipeline systems for fastening connections between hydraulic pipelines and equipment. The basic design requirement is to have a good and reliable seal, especially for hydraulic pipeline joints that are difficult to repair in hidden locations or special environments, and leakage is not allowed.

[0003] The existing hydraulic threaded joints use outer nut to thread the two end joints, but under the influence of long-term hull vibration and hydraulic pipeline pressure changes, the threaded connection of this joint will become slightly loose, which will cause the gap at the gasket to increase and the joint seal to leak. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a joint assembly.

[0005] The technical solution adopted to achieve the purpose of this application is that the present invention discloses a joint assembly, including:

[0006] First joint;

[0007] a second joint, the second joint being slidably matched with the first joint;

[0008] a sealing ring assembly, disposed between the first joint and the second joint; and

[0009] An outer sleeve nut, wherein the first end of the outer sleeve nut is threadedly connected to the second joint, and the second end of the outer sleeve nut opposite to the first end is connected to the first joint to limit the movement range of the first joint relative to the outer sleeve nut along the axial direction of the outer sleeve nut.

[0010] In some embodiments, a first latching tooth is provided on the end face of the first end of the outer sleeve nut, and a second latching tooth is provided on the end face of the second joint opposite to the first latching tooth, and the second latching tooth cooperates with the first latching tooth to relatively lock the second joint and the outer sleeve nut.

[0011] In some embodiments, at least one of the first latching teeth and the second latching teeth is provided in plurality, and the plurality of the first latching teeth or the plurality of the second latching teeth are provided in a ring shape.

[0012] In some embodiments, the first latching tooth includes a latching surface and an inclined surface, the latching surface is arranged along the radial direction of the outer sleeve nut, and the inclined surface is arranged obliquely with the latching surface; the shape of the second latching tooth is adapted to the shape of the first latching tooth.

[0013] In some embodiments, a first through hole is provided at the first end of the outer sleeve nut, a second through hole communicating with the first through hole is provided at the second end of the outer sleeve nut, and the second through hole is coaxially arranged with the first through hole, a diameter of the first through hole is larger than a diameter of the second through hole, and an internal thread is provided on a side wall of the first through hole;

[0014] The first joint is inserted into the first through hole and the second through hole, and the first joint is provided with a limiting portion, the outer diameter of the limiting portion is larger than the diameter of the second through hole, and the outer diameter of the limiting portion is less than or equal to the diameter of the first through hole;

[0015] An outer wall of the second end of the second joint is provided with an outer thread matching the inner thread.

[0016] In some embodiments, a sealing groove is disposed at the second end of the second joint, and the first end of the first joint is slidably matched with the sealing groove.

[0017] In some embodiments, the sum of the length of the second end of the second joint in the axial direction of the outer sleeve nut and the width of the limiting portion in the axial direction of the outer sleeve nut is less than the length of the first through hole in the axial direction of the outer sleeve nut.

[0018] In some embodiments, the distance between the limiting portion and the end surface of the first end of the first joint in the axial direction of the outer sleeve nut is equal to or smaller than the depth of the sealing groove in the axial direction of the outer sleeve nut.

[0019] In some embodiments, the limiting portion extends to an end surface of the first end of the first joint.

[0020] In some embodiments, the first connector is provided with a first channel and a first connection port that are connected, the diameter of the first connection port is larger than the diameter of the first channel, and the first connection port is coaxially arranged with the first channel, the first connection port is located at the first end of the first connector, and the first channel is located at the second end of the connector;

[0021] The second joint is provided with a connected second channel and a second connecting port, the diameter of the second connecting port is larger than the diameter of the second channel, and the second connecting port and the second channel are coaxially arranged, the second connecting port is located at the first end of the second joint, the second channel is located at the second end of the joint, and the second channel is connected to the first channel.

[0022] The embodiment of the present application discloses a joint assembly, which includes a first joint, a second joint, a sleeve nut and a sealing ring. The second joint is slidably matched with the first joint, and the sealing ring is arranged between the first joint and the second joint. The first end of the sleeve nut is threadedly matched with the second joint, and the second end of the sleeve nut opposite to the first end is connected to the first joint to limit the movement range of the first joint relative to the sleeve nut along the axial direction of the sleeve nut.

[0023] Through the above embodiments, the present application has the following beneficial effects or advantages: the first joint in the joint assembly disclosed in the present application is inserted into the second joint, and while the sealing ring assembly is used to form a seal, the sealing ring and the first joint can also limit the second joint from the inside of the second joint, thereby weakening the vibration to which it will be subjected. The outer sleeve nut is sleeved outside the second joint, and the outer sleeve nut and the second joint are threadedly matched. The outer sleeve nut can limit the second joint from the outside, thereby ensuring that the second joint is not easy to loosen when it is vibrated during operation, thereby avoiding sealing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a joint assembly in an embodiment of the present application;

[0025] Figure 2 is a cross-sectional schematic diagram of a connector assembly in an embodiment of the present application;

[0026] Figure 3 It is a partial cross-sectional schematic diagram of the first joint in the embodiment of the present application;

[0027] Figure 4 is a partial cross-sectional schematic diagram of the second joint in the embodiment of the present application;

[0028] Figure 5 It is a partial cross-sectional schematic diagram of the outer sleeve nut in the embodiment of the present application;

[0029] Figure 6 is a cross-sectional schematic diagram of another connector assembly in an embodiment of the present application;

[0030] Figure 7 In the embodiment of this application Figure 6 A schematic cross-sectional view of the first joint;

[0031] Figure 8In the embodiment of this application Figure 6 Schematic cross-sectional view of the middle sleeve nut.

[0032] Description of reference numerals:

[0033] 100-first joint, 110-limiting portion, 120-annular groove, 130-first channel, 140-first connecting port, 200-second joint, 210-second latch, 220-sealing groove, 230-second channel, 240-second connecting port, 300-jacket nut, 310-first latch, 320-first through hole, 330-second through hole, 340-third through hole, 400-sealing ring, 500-sealing retaining ring. DETAILED DESCRIPTION

[0034] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] The embodiment of the invention discloses a joint assembly, which can solve the technical problem that the existing joints are easy to loosen after being subjected to long-term vibration, thereby avoiding sealing leakage.

[0038] The technical solution of the present application is described in detail below through specific embodiments:

[0039] See also Figure 1 and Figure 2The embodiment of the present application discloses a joint assembly, which includes a first joint 100, a second joint 200, a sleeve nut 300 and a sealing ring assembly. The second joint 200 is slidably matched with the first joint 100, and the sealing ring assembly is arranged between the first joint 100 and the second joint 200. The first end of the sleeve nut 300 is threadedly connected with the second joint 200, and the second end of the sleeve nut 300 opposite to the first end is connected to the first joint 100 to limit the movement range of the first joint 100 relative to the sleeve nut 300 along the axial direction of the sleeve nut 300.

[0040] Through the above embodiments, the present application has the following beneficial effects or advantages: the first joint 100 in the joint assembly disclosed in the present application is inserted into the second joint 200, and while the sealing ring assembly is used to form a seal, the sealing ring assembly and the first joint 100 can also limit the second joint 200 from the inside of the second joint 200, thereby weakening the vibration to which the second joint 200 will be subjected. The outer sleeve nut 300 is sleeved outside the second joint 200, and the outer sleeve nut 300 and the second joint 200 are threadedly matched. The outer sleeve nut 300 can limit the second joint 200 from the outside, thereby ensuring that the second joint 200 is not easy to loosen when it is vibrated during operation, thereby avoiding sealing leakage.

[0041] See 3 and Figure 5 In one embodiment, the end surface of the first end of the outer sleeve nut 300 is provided with a first latching tooth 310. The diameter of the first end of the second joint 200 is greater than the diameter of the second end thereof, and a second latching tooth 210 is provided on the side of the first end of the second joint 200 facing the outer sleeve nut 300, and the second latching tooth 210 cooperates with the first latching tooth 310 to fix the second joint 200 to the outer sleeve nut 300.

[0042] Specifically, when the second connector 200 is screwed along the first direction, as the second connector 200 moves toward the first connector 100, the second latch tooth 210 will also move toward the first latch tooth 310. When the first end of the second connector 200 abuts against the first end of the outer sleeve nut 300, the second latch tooth 210 and the first latch tooth 310 form a latching connection. At this time, when the second connector 200 is not subject to external force or the external force is small, it is difficult to break through the latching force between the second latch tooth 210 and the first latch tooth 310 and rotate in the opposite direction, thereby ensuring the stability of the connection between the second connector 200 and the outer sleeve nut 300.

[0043] In one embodiment, in order to ensure that the second latch tooth 210 can stably form a latching connection with the first latch tooth 310 when the first end of the second connector 200 abuts against the first end of the outer sleeve nut 300, at least one of the first latch tooth 310 and the second latch tooth 210 can be provided as a plurality and arranged in a ring shape, so that the second latch tooth 210 can form a latching connection with the first latch tooth 310 when the second connector 200 is rotated at any angle to abut against the outer sleeve nut 300.

[0044] In one embodiment, the first latching teeth 310 and the second latching teeth 210 are both provided in a plurality and are arranged in a ring shape. In this case, the number of the second latching teeth 210 is equal to the number of the first latching teeth 310, and the spacing distance between the second latching teeth 210 is equal to the spacing distance between the first latching teeth 310. In this case, the external force required to engage all the second latching teeth 210 with all the first latching teeth 310 is greater, and accordingly, the force required to loosen the second joint 200 is also greater, and the connection between the second joint 200 and the outer sleeve nut 300 is more stable.

[0045] In one embodiment, the first latching tooth 310 includes a latching surface and an inclined surface. The latching surface is arranged along the radial direction of the outer sleeve nut 300, and the inclined surface is arranged obliquely with the latching surface so that the first latching tooth 310 is sawtooth-shaped. Such a first latching tooth has a strong locking performance and can maintain the stability of the connection between the second joint 200 and the outer sleeve nut 300 in a large impact and vibration environment. The inclined surface is located behind the engaging surface in the first direction, that is, when the second latch 210 and the first latch 310 are matched, their inclined surfaces are first in contact, and when the rotation continues, the engaging surfaces of the second latch 210 and the first latch 310 are arranged relative to each other in a second direction opposite to the first direction, and the second joint 200 can be rotated in the first direction to be assembled on the outer sleeve nut 300, but when the second joint 200 has a tendency to rotate in the second direction, due to the restriction of the engaging surfaces of the second latch 210 and the first latch 310, a restricting force is added to the tendency of the second joint 200 to rotate in the second direction, thereby ensuring that the second joint 200 cannot rotate in the second direction under normal force, that is, under normal circumstances, the second joint 200 will not loosen relative to the outer sleeve nut 300. The shape of the second latching tooth 210 is adapted to the shape of the first latching tooth 310, that is, the shape of the second latching tooth 210 can be the same as the shape of the first latching tooth 310, but the direction of the second latching tooth 210 is opposite to the direction of the first latching tooth 310 so that the second latching tooth 210 can form a match with the first latching tooth 310. When the second joint 200 is screwed and tightened with the outer sleeve nut 300, it is necessary to overcome the friction force of the screw thread pair and the friction force of the serrated fitting surface. Compared with the existing method of using a sealing gasket, the large sealing pre-tightening force required when the sealing gasket is pressed to cause plastic deformation is omitted, so the pre-tightening torque of the thread is saved.

[0046] It should be noted that, in this embodiment, Figure 1 The clockwise direction in is the first direction, Figure 1 The counterclockwise direction in is the second direction.

[0047] In one embodiment, the second latching tooth 210 and the first latching tooth 310 may have the same shape, which is more convenient during processing, and the second latching tooth 210 and the first latching tooth 310 are more stable when matched. For example, the cross-sections of the first latching tooth 310 and the second latching tooth 210 may be set to be triangular, and after the tip portions of the second latching tooth 210 and the first latching tooth 310 are forced to rotate to form a match, a stable engagement may be formed. Of course, in other embodiments, the cross-sections of the first latching tooth 310 and the second latching tooth 210 may be set to be semicircular or other shapes.

[0048] See also Figure 2 and Figure 3 In one embodiment, a first through hole 320 is provided at the first end of the outer sleeve nut 300, and a second through hole 330 communicating with the first through hole 320 is provided at the second end of the outer sleeve nut 300, and the second through hole 330 is coaxially arranged with the first through hole 320. The diameter of the first through hole 320 is greater than the diameter of the second through hole 330, and a thread is provided on the side wall of the first through hole 320. The first through hole 320 is located at the first end of the outer sleeve nut 300, and the second through hole 330 is located at the second end of the outer sleeve nut 300.

[0049] See also Figure 2 and Figure 4 , a limiting portion 110 is provided in the middle of the first joint 100 (not specifically the middle position, only distinguished from its end), and the limiting portion 110 protrudes outward from the outer wall of the first joint 100 along its radial direction. The diameter of the limiting portion 110 is greater than the diameter of the second through hole 330, and the diameter of the limiting portion 110 is less than or equal to the diameter of the first through hole 320. The second end of the first joint 100 can pass through the second through hole 330, and the second end of the first joint 100 is penetrated in the second through hole 330 and the first through hole 320 so that the first joint 100 can move relative to the outer sleeve nut 300 along the axial direction of the outer sleeve nut 300. Since the diameter of the limiting portion 110 is greater than the diameter of the second through hole 330, the limiting portion 110 of the first joint 100 and its first end are limited in the outer sleeve nut 300, and the limiting portion 110 of the first joint 100 and its first end are located in the first through hole 320.

[0050] See also Figure 4 An external thread is provided on the second end of the second joint 200 , and the second end of the second joint 200 is threadedly matched with the first through hole 320 .

[0051] It should be noted that, see Figure 2In this embodiment, the right side of the limiting portion 110 of the first joint 100 is the first end of the first joint 100, and the left side of the limiting portion 110 of the first joint 100 is the second end of the first joint 100. The part with a larger diameter of the first joint 100 is the first end, and the part with a smaller diameter is the second end. The right side of the outer sleeve nut 300 is the first end, and the left side of the outer sleeve nut 300 is the second end.

[0052] In one embodiment, a sealing groove 220 is further provided at the second end of the second joint 200, the diameter of the sealing groove 220 is equal to the diameter of the first end of the first joint 100, and the depth of the sealing groove 220 along the axial direction of the outer sleeve nut 300 is equal to the length of the first end of the first joint 100 along the axial direction of the outer sleeve nut 300, or the depth of the sealing groove 220 along the axial direction of the outer sleeve nut 300 is greater than the length of the first end of the first joint 100 along the axial direction of the outer sleeve nut 300, that is, the distance between the limiting portion 110 and the end surface of the first end of the first joint 100 along the axial direction of the outer sleeve nut 300 is equal to or less than the depth of the sealing groove along the axial direction of the outer sleeve nut 300. The first end of the first joint 100 is slidably matched with the sealing groove 220, the first joint 100 and the second joint 200 are coaxially arranged, and the first joint 100 can slide relative to the second joint 200 along its axis.

[0053] In one embodiment, the sealing ring assembly includes a sealing ring 400, which is sleeved outside the first joint 100. After the first joint 100 and the second joint 200 are connected, the sealing ring 400 is located between the outer wall of the first joint 100 and the inner wall of the second joint 200. The sealing ring 400 is squeezed by the first joint 100 and the second joint 200, and the sealing ring 400 is deformed, thereby being closely attached to the outer wall of the first joint 100 and the inner wall of the second joint 200, thereby achieving a sealing effect.

[0055] In one embodiment, the sealing ring assembly includes a sealing ring 400 and a sealing retaining ring 500. An annular groove 120 is provided on one of the outer wall of the first joint 100 and the side wall of the sealing groove 220. The annular groove 120 is used to install the sealing ring 400 and the sealing retaining ring 500 for fixing the sealing ring 400. The sealing retaining ring 500 is provided on both sides of the sealing ring 400. After the first end of the first joint 100 is inserted into the sealing groove 220, the sealing ring 400 and the sealing retaining ring 500 are squeezed to deform the sealing ring 400 to form a seal. The rubber material used in the sealing ring 400 and the sealing retaining ring 500 is easy to deform under pressure, and can generate a large contact stress. The medium fluid pressure will also act on the sealing ring 400 and the sealing retaining ring 500 in a superimposed manner, thereby forming a seal.

[0056] There may be two sealing rings 500 , which are respectively installed on both sides of the sealing ring 400 .

[0057] On the one hand, the sealing ring 400 is squeezed and deformed by the outer wall of the first joint 100 and the inner wall of the second joint 200 to form a seal. On the other hand, the medium fluid also acts on the sealing ring 400 and the sealing retaining ring 500, and the sealing retaining ring 500 can assist in supporting the sealing ring 400 to withstand the pressure from the external fluid, thereby preventing the external fluid from penetrating and preventing the internal fluid from penetrating.

[0058] See also Figure 4 In this embodiment, the annular groove 120 can be set at the first end of the first joint 100, and the sealing ring 400 and the sealing retaining ring 500 can be installed in the annular groove 120 before assembling the first joint 100 and the second joint 200. Of course, setting the annular groove 120 at the first end of the first joint 100 is only one implementation of this embodiment. In other implementations, it is also possible to set the annular groove 120 on the inner wall of the sealing groove 220.

[0059] In one embodiment, the sum of the length of the second end of the second joint 200 in the axial direction of the outer sleeve nut 300 and the width of the limiting portion 110 in the axial direction of the outer sleeve nut 300 is less than the length of the first through hole 320 in the axial direction of the outer sleeve nut 300. In this way, after assembly, there is a reserved gap between the first joint 100 and the second joint 200. When the liquid flows between the first joint 100 and the second joint 200, on the one hand, the reserved gap can be used to eliminate stress, and because the sealing ring 400 is always located between the first joint 100 and the second joint 200, it can be well sealed; on the other hand, there is a gap between the first joint 100 and the second joint 200, so that the first joint 100 can rotate relative to the second joint 200, and when connected with an external pipe, it can better adapt to the installation angle of the external pipe, so that the installation is more convenient and quick.

[0060] See also Figure 6 , Figure 7 and Figure 8 In one embodiment, the limiting portion 110 extends rightward all the way to the end surface of the first end of the first joint 100 in the axial direction of the outer sleeve nut 300. At this time, the diameter of the first end of the first joint 100 is greater than the diameter of the second end of the first joint 100. Accordingly, the diameter of the sealing groove 220 can be adjusted to adapt to the diameter of the limiting portion 110. At this time, it is only necessary to make the distance between the bottom of the sealing groove 220 and the second through hole 330 greater than the width of the limiting portion 110 to ensure that the first joint 100 can smoothly rotate relative to the second joint 200.

[0061] In this embodiment, the diameter of the first through hole 320 of the outer sleeve nut 300 is larger than the diameter of the limiting portion 110, and a third through hole 340 is further provided on the outer sleeve nut 300. The third through hole 340 is located between the first through hole 320 and the second through hole 330, and the diameter of the third through hole 340 is smaller than the diameter of the first through hole 320 but larger than the diameter of the second through hole 330. The diameter of the third through hole 340 may be equal to the diameter of the limiting portion 110, or may be slightly larger than the diameter of the limiting portion 110, and the limiting portion 110 is located in the third through hole 340. By providing the third through hole 340, the limiting portion 110 can be limited in the circumferential direction, thereby ensuring the stability of the connection between the first joint 100 and the second joint 200, and preventing the first joint 100 from shaking due to pressure after the fluid is passed.

[0062] In one embodiment, the first connector 100 is provided with a first channel 130 and a first connection port 140 that are connected, the diameter of the first connection port 140 is larger than the diameter of the first channel 130, and the first connection port 140 is coaxially arranged with the first channel 130. The first channel 130 is located at a first end of the first connector 100, and the first connection port 140 is located at a second end of the first connector 100. The first connector 100 can be connected to an external pipeline through the first connection port 140.

[0063] The second connector 200 is provided with a second channel 230 and a second connection port 240 that are connected. The diameter of the second connection port 240 is larger than the diameter of the second channel 230, and the second connection port 240 is coaxially arranged with the second channel 230. The second connection port 240 is located at the first end of the second connector 200, and the second channel 230 is located at the second end of the second connector 200. The second channel 230 is connected with the first channel 130, and the diameter of the second channel 230 can be made equal to the diameter of the first channel 130, so that the liquid flows more smoothly between the first connector 100 and the second connector 200. The second connector 200 can be connected with an external pipeline through the second connection port 240, and the diameter of the first connection port 140 can be made equal to the diameter of the second connection port 240, so that it is more convenient to assemble the pipeline and the connector assembly.

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0065] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0067] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A joint assembly, characterized in that: include: First joint; a second joint, the second joint being slidably matched with the first joint; a sealing ring assembly, disposed between the first joint and the second joint; and An outer sleeve nut, wherein the first end of the outer sleeve nut is threadedly connected to the second joint, and the second end of the outer sleeve nut opposite to the first end is connected to the first joint to limit the movement range of the first joint relative to the outer sleeve nut along the axial direction of the outer sleeve nut.

2. The joint assembly according to claim 1, characterized in that: The end surface of the first end of the outer sleeve nut is provided with a first latching tooth, and the end surface of the second joint opposite to the first latching tooth is provided with a second latching tooth, and the second latching tooth cooperates with the first latching tooth to relatively lock the second joint and the outer sleeve nut.

3. The joint assembly according to claim 2, characterized in that: At least one of the first latching teeth and the second latching teeth is provided in plurality, and the plurality of the first latching teeth or the plurality of the second latching teeth are arranged in a ring shape.

4. The joint assembly according to claim 2, characterized in that: The first latching tooth comprises a latching surface and an inclined surface, the latching surface is arranged along the radial direction of the outer sleeve nut, and the inclined surface is arranged obliquely with the latching surface; the shape of the second latching tooth matches the shape of the first latching tooth.

5. The joint assembly according to any one of claims 1 to 4, characterized in that: The first end of the outer sleeve nut is provided with a first through hole, the second end of the outer sleeve nut is provided with a second through hole connected with the first through hole, and the second through hole is coaxially arranged with the first through hole, the diameter of the first through hole is larger than the diameter of the second through hole, and the side wall of the first through hole is provided with an internal thread; The first joint is inserted into the first through hole and the second through hole, and the first joint is provided with a limiting portion, the outer diameter of the limiting portion is larger than the diameter of the second through hole, and the outer diameter of the limiting portion is less than or equal to the diameter of the first through hole; An outer wall of the second end of the second joint is provided with an outer thread matching the inner thread.

6. The joint assembly according to claim 5, characterized in that: The second end of the second joint is provided with a sealing groove, and the first end of the first joint is slidably matched with the sealing groove.

7. The joint assembly according to claim 6, characterized in that: The sum of the length of the second end of the second joint in the axial direction of the outer sleeve nut and the width of the limiting portion in the axial direction of the outer sleeve nut is smaller than the length of the first through hole in the axial direction of the outer sleeve nut.

8. The joint assembly according to claim 7, characterized in that: The distance between the limiting portion and the end surface of the first end of the first joint in the axial direction of the outer sleeve nut is equal to or smaller than the depth of the sealing groove in the axial direction of the outer sleeve nut.

9. The joint assembly according to claim 6, characterized in that: The limiting portion extends to an end surface of the first end of the first joint.

10. The joint assembly according to claim 1, characterized in that: The first joint is provided with a first channel and a first connection port which are connected to each other, the diameter of the first connection port is larger than the diameter of the first channel, and the first connection port is coaxially arranged with the first channel, the first connection port is located at a first end of the first joint, and the first channel is located at a second end of the joint; The second joint is provided with a connected second channel and a second connecting port, the diameter of the second connecting port is larger than the diameter of the second channel, and the second connecting port and the second channel are coaxially arranged, the second connecting port is located at the first end of the second joint, the second channel is located at the second end of the joint, and the second channel is connected to the first channel.

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