Connecting joint

Abstract

The utility model provides a connecting joint which is used for being connected with a matched joint, the connecting joint comprises a joint body, a locking spring and a fixing ring, and an inserting hole is formed in the joint body; the lock spring comprises an elastic strip plate, a first limiting block and an abutting block, and the first limiting block and the abutting block are arranged on the elastic strip plate; the fixing ring is arranged in the connector body, an avoiding hole for avoiding the lock spring to be inserted is formed in the circumferential direction of the fixing ring, and a blocking table is arranged at the position, away from the inserting hole, of the fixing ring. The lock spring can drive the first limiting block to be inserted into the connector body and the fixing ring through the insertion hole and the receding hole until the first limiting block abuts against the blocking table. The matching connector can push the abutting block to enable the elastic strip plate to elastically deform so as to drive the first limiting block to move and break away from limiting of the near end of the blocking table in the insertion direction, and then the locking spring is further inserted into the connector body and the fixing ring to lock the matching connector.

Description

Technical Field

[0001] The utility model relates to the field of connections of new energy vehicle cooling systems, and particularly to a connection joint. Background Art

[0002] The market share of new energy vehicles has been increasing year by year. The battery packs of such vehicles need to be equipped with cooling systems, and the energy storage cabinets in fast charging stations also need to be equipped with cooling systems. The cooling system consists of many cooling pipelines, and connection joints are required for the connection between pipelines and between pipelines and chillers. The assembly requirements between the mating joint and the connection joint have a self-locking function to prevent disconnection due to vibration and other influences.

[0003] Currently, the existing connection joints usually have a lock spring inserted. The first limiting block of the lock spring is used in cooperation with the first end face of the stop on the joint body to limit the position of the lock spring in the pre-installed position. After the mating joint is inserted, the first limiting block moves from the first end face to the second end face, and finally the lock spring realizes the locking function for the mating joint. However, in order to achieve the self-locking function, the existing connection joints need to make the stop on the joint body have a first end face and a second end face, which inevitably causes multiple holes to be opened on the joint body, resulting in poor sealing and aesthetics of the joint body, and foreign objects may enter the inside of the joint body, and the mating joint cannot be well protected. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a connection joint for connecting a mating joint in view of the above problems. The connection joint includes: a joint body, a lock spring and a fixing ring. An insertion hole is provided on the joint body; the lock spring includes an elastic strip, a first limiting block and a pushing block, and the first limiting block and the pushing block are arranged on the elastic strip; the fixing ring is arranged inside the joint body, and an avoidance hole for avoiding the insertion of the lock spring is provided in the circumferential direction of the fixing ring, and a stop is provided at a position far from the insertion hole; wherein, the lock spring can drive the first limiting block to be inserted into the joint body and the fixing ring through the insertion hole and the avoidance hole until it abuts against the stop, and the mating joint can push the pushing block to elastically deform the elastic strip to drive the first limiting block to move away from the limit of the proximal end of the stop in the insertion direction, and further the lock spring is inserted into the joint body and the fixing ring to lock the mating joint.

[0005] With such a setting, the first limit block on the locking spring cooperates with the retaining platform on the fixing ring to limit the position, so that the locking spring is in the pre-installation position. After the mating joint is inserted, the locking spring disengages from the limit and reaches the locking position to lock the inserted mating joint. Therefore, there is no need to open multiple holes at one end of the joint body opposite to the insertion end, and only an insertion hole needs to be opened at the insertion end, making the joint body easier to seal, more beautiful, reducing the probability of foreign objects entering the inside of the joint body, and the mating joint can also be better protected.

[0006] In an embodiment of the present invention, a pushing inclined surface is provided on the pushing block, and the mating joint can push the pushing block through the pushing inclined surface to cause the elastic strip to undergo radial elastic deformation.

[0007] With such a setting, the pushing inclined surface can make it easier for the mating joint to push the elastic strip to undergo radial elastic deformation, and the insertion force applied to the mating joint is smaller.

[0008] In an embodiment of the present invention, a first guiding inclined surface is provided at the proximal end of the first limit block along the insertion direction, and a second guiding inclined surface is provided at the distal end. A third guiding inclined surface is provided at the proximal end of the retaining platform along the insertion direction, and a fourth guiding inclined surface is provided at the distal end. A first transition arc surface is provided between the first guiding inclined surface and the second guiding inclined surface, and a second transition arc surface is provided between the third guiding inclined surface and the fourth guiding inclined surface.

[0009] With such a setting, when the second guiding inclined surface abuts and cooperates with the third guiding inclined surface, after the elastic strip undergoes radial elastic deformation during the insertion of the mating joint, the first limit block is more likely to disengage from the limit of the retaining platform at the proximal end along the insertion direction. When the first guiding inclined surface abuts and cooperates with the fourth guiding inclined surface, after the elastic strip undergoes radial elastic deformation during the removal of the locking spring, the first limit block is more likely to disengage from the limit of the retaining platform at the distal end along the insertion direction. The cooperation of the first transition arc surface and the second transition arc surface makes the switching of the locking spring between the pre-installation position and the locking position smoother. Through the cooperation of these inclined surfaces and arc surfaces, the switching of the connecting joint between the locked and unlocked states is made easier.

[0010] In an embodiment of the present invention, the locking spring further includes a limit baffle, and the limit baffle and the first limit block are respectively arranged on both sides of the elastic strip; and when the first limit block disengages from the limit of the retaining platform at the proximal end along the insertion direction, the limit baffle can abut against the joint body.

[0011] With such a setting, the limit baffle can prevent the locking spring from being inserted into the joint body excessively, and can shield the insertion hole on the joint body, making the joint body have better sealing performance, more beautiful, reducing the probability of foreign objects entering the inside of the joint body, and the mating joint can also be better protected.

[0012] In an embodiment of the present utility model, the locking spring further includes a second limiting block. When the first limiting block abuts against the retaining platform, the second limiting block can abut against the retaining platform in the circumferential direction of the fixing ring.

[0013] With such a setting, the second limiting block can prevent the first limiting block of the locking spring from sliding to the inner side wall of the fixing ring.

[0014] In an embodiment of the present utility model, the locking spring further includes a locking plate. The mating joint is provided with an annular groove in the circumferential direction, and the locking spring can be clamped in the annular groove of the mating joint through the locking plate to lock the mating joint to the joint body; wherein, a first sliding groove for matching the locking plate is formed on the joint body, and guided by the cooperation between the locking plate and the first sliding groove, the locking spring is guided to be inserted into the jack of the joint body.

[0015] With such a setting, the locking function is realized through the cooperation of the locking plate and the annular groove to prevent the radial displacement of the mating joint. The first sliding groove can provide a guiding effect when the locking spring is inserted, and can also prevent the axial displacement of the locking plate along the joint body when the mating joint is inserted.

[0016] In an embodiment of the present utility model, a second sliding groove for matching the elastic strip is further formed on the joint body, and guided by the cooperation between the elastic strip and the second sliding groove, the locking spring is guided to be inserted into the jack of the joint body.

[0017] With such a setting, the second sliding groove can provide a guiding effect when the locking spring is inserted, and prevent the axial displacement of the elastic strip along the joint body when the mating joint is inserted, so that it can only undergo radial elastic deformation.

[0018] In an embodiment of the present utility model, the locking plate is provided with a fifth guiding inclined surface, and the mating joint can be abutted against the locking plate through the guidance of the fifth guiding inclined surface.

[0019] With such a setting, the fifth guiding inclined surface makes the abutting fit between the mating joint and the locking plate smoother. Before the locking plate cooperates with the annular groove, since the mating joint abuts against the locking plate, the locking spring can never reach the locking position.

[0020] In an embodiment of the present utility model, a guiding rib is provided between the first sliding groove and the second sliding groove. The guiding rib is provided with a sixth guiding inclined surface at the proximal end along the insertion direction. A guiding convex block is provided on the side of the locking plate close to the elastic strip, and the sixth guiding inclined surface guides the guiding convex block to be abutted and fitted on the guiding rib.

[0021] With such a setting, the cooperation between the guiding bump and the sixth guiding inclined surface can make it easier to find the correct insertion position when inserting the locking spring. And after insertion, the guiding bump always abuts against the guiding rib, so that the locking spring can always be kept in the correct position.

[0022] In an embodiment of the present utility model, the connecting joint further includes a first sealing ring, a spacer ring and a second sealing ring. The first sealing ring, the spacer ring and the second sealing ring are sequentially installed in the joint body. And the mating joint can cooperate with the joint body and simultaneously squeeze the first sealing ring and the second sealing ring to deform.

[0023] With such a setting, through the structural settings of the above-mentioned first sealing ring, spacer ring and second sealing ring, when the connecting joint and the mating joint are inserted and mated, a double-sealing effect can be achieved to meet the use requirements of the assembly seal between the connecting joint and the mating joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0025] Figure 1 It is a sectional exploded view of the assembly of the connecting joint and the mating joint in an embodiment of the present application;

[0026] Figure 2 For Figure 1 the enlarged view of part A in

[0027] Figure 3 It is an exploded view of a connecting joint in an embodiment of the present application from one perspective;

[0028] Figure 4 It is an exploded view of a connecting joint in an embodiment of the present application from another perspective;

[0029] Figure 5 It is a structural schematic diagram of a connecting body in an embodiment of the present application from one perspective;

[0030] Figure 6 It is a structural schematic diagram of a connecting body in an embodiment of the present application from another perspective;

[0031] Figure 7 It is a structural schematic diagram of a locking spring in an embodiment of the present application from one perspective;

[0032] Figure 8Schematic structural diagram of another perspective of the locking spring according to an embodiment of the present application;

[0033] Figure 9 Schematic structural diagram of one perspective of the fixing ring according to an embodiment of the present application;

[0034] Figure 10 Schematic structural diagram of another perspective of the fixing ring according to an embodiment of the present application.

[0035] Reference numerals: 100, connecting joint; 10, joint body; 11, jack; 12, limiting strip; 13, first sliding groove; 14, second sliding groove; 15, buckling groove; 16, stepped surface; 17, first limiting boss; 18, second limiting boss; 19, guiding rib; 191, sixth guiding inclined surface; 20, locking spring; 21, elastic strip plate; 22, first limiting block; 221, first guiding inclined surface; 222, second guiding inclined surface; 223, first transition arc surface; 23, pushing block; 231, pushing inclined surface; 24, second limiting block; 25, locking plate; 251, guiding protrusion; 252, fifth guiding inclined surface; 26, limiting baffle; 261, upturned part; 30, fixing ring; 31, avoidance hole; 32, retaining table; 321, third guiding inclined surface; 322, fourth guiding inclined surface; 323, second transition arc surface; 33, convex buckle; 40, first sealing ring; 50, spacer ring; 51, limiting step; 60, second sealing ring; 200, mating joint; 201, annular groove. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present application more obvious and understandable, the following describes the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0038] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature or in indirect contact with the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, when the first feature is "above", "over" or "on top of" the second feature, the first feature may be directly above or diagonally above the second feature, or merely indicate that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "under", "beneath" or "underneath" the second feature, the first feature may be directly below or diagonally below the second feature, or merely indicate that the horizontal height of the first feature is lower than that of the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0041] As Figure 1 shown, this application claims protection for a connection joint 100, one end of which is used to connect to a mating joint 200, and the other end is used to connect to a connecting pipe (not shown in the figure). It should be noted that the mating joint 200 and the connection joint 100 of this application can be specifically set as a matching male joint and female joint according to the usage requirements, and the connecting pipe can be specifically set as a flexible pipe.

[0042] As Figure 1 、 3 -6 shows, the connection joint 100 provided by an embodiment of this application includes a joint body 10, a lock spring 20, a fixing ring 30, a first sealing ring 40, a spacer ring 50 and a second sealing ring 60.

[0043] Specifically, a jack 11 is formed on the joint body 10, and the lock spring 20 can be inserted into the joint body 10 through the jack 11 to lock the mating joint 200 to the joint body 10. That is to say, the connection joint 100 of this application specifically uses the lock spring 20 to lock the mating joint 200 inserted into the joint body 10. It should be noted that the direction in which the lock spring 20 of this application is inserted into the jack 11 on the joint body 10 is perpendicular to the direction in which the mating joint 200 is inserted into the connection joint 100.

[0044] As shown Figure 1 , 3 , Figures 4, 7 - 10 show that the fixing ring 30 of the present application is detachably installed in the joint body 10. The fixing ring 30 is provided with an avoidance hole 31 for the insertion of the locking spring 20 in the circumferential direction, and a stop 32 is provided at a position away from the insertion hole 11. The locking spring 20 includes an elastic strip 21, and a first limiting block 22 and a pushing block 23 are provided on the elastic strip 21. The locking spring 20 can drive the first limiting block 22 to be inserted into the joint body 10 and the fixing ring 30 through the insertion hole 11 and the avoidance hole 31 until it abuts against the stop 32. A pushing inclined surface 231 is provided on the pushing block 23. The mating joint 200 can push the pushing block 23 through the pushing inclined surface 231, and the pushing block 23 can drive the first limiting block 22 to move away from the limit of the proximal end of the insertion direction by using the elastic deformation of the elastic strip 21. Further, the locking spring 20 is further inserted into the joint body 10 and the fixing ring 30 to lock the mating joint 200.

[0045] It can be understood that the number of the elastic strips 21 on the locking spring 20 is two, and a first limiting block 22 and a pushing block 23 are respectively provided on each elastic strip 21; the stops 32 of the fixing ring 30 are arranged in one-to-one correspondence with the first limiting blocks 22 to meet the use requirements of the assembly of the locking spring 20 on the joint body 10; when the mating joint 200 is inserted, the outer diameter of the mating joint 200 is greater than the minimum distance between the two pushing inclined surfaces 231, and the mating joint 200 can push the pushing inclined surface 231 on the pushing block 23. By using the inclined surface structure characteristics of the pushing inclined surface 231, when the mating joint 200 starts to push the pushing inclined surface 231 on the pushing block 23, the elastic strip 21 undergoes elastic deformation, and the distance between the two first limiting blocks 22 continuously increases, and the second guiding inclined surface 222 slides on the third guiding inclined surface 321; the cooperation between the first limiting block 22 on the locking spring 20 and the stop on the fixing ring 30 limits the position, so that the locking spring 20 is in the pre-installed position. After the mating joint 200 is inserted, the locking spring 20 is disengaged from the limit and reaches the locking position to lock the inserted mating joint 200. Therefore, there is no need to open a plurality of holes at one end of the relative insertion end of the joint body 10, and only the insertion hole 11 needs to be opened at the insertion end, making the joint body 10 easier to seal, more beautiful, reducing the probability of foreign objects entering the inside of the joint body 10, and the mating joint 200 can also be better protected; the pushing inclined surface 231 can make it easier for the mating joint 200 to push the elastic strip 21 to generate radial elastic deformation, and the insertion force applied to the mating joint 200 is smaller.

[0046] Specifically, as shown Figures 7 - 10As shown, the first limiting block 22 is provided with a first guiding inclined surface 221 at the proximal end along the insertion direction and a second guiding inclined surface 222 at the distal end. The retaining platform 32 is provided with a third guiding inclined surface 321 at the proximal end along the insertion direction and a fourth guiding inclined surface 322 at the distal end. A first transition arc surface 223 is provided between the first guiding inclined surface 221 and the second guiding inclined surface 222, and a second transition arc surface 323 is provided between the third guiding inclined surface 321 and the fourth guiding inclined surface 322.

[0047] It can be understood that when the second guiding inclined surface 222 abuts and cooperates with the third guiding inclined surface 321, after the elastic strip 21 undergoes radial elastic deformation during the insertion of the insertion mating joint 200, the first limiting block 22 is more likely to disengage from the limit of the retaining platform 32 at the proximal end along the insertion direction. When the first guiding inclined surface 221 abuts and cooperates with the fourth guiding inclined surface 322, after the elastic strip 21 undergoes radial elastic deformation during the removal of the locking spring 20, the first limiting block 22 is more likely to disengage from the limit of the retaining platform 32 at the distal end along the insertion direction. The cooperation of the first transition arc surface 223 and the second transition arc surface 323 makes the switching of the locking spring 20 between the pre-installed position and the locked position smoother. Through the cooperative setting of these inclined surfaces and arc surfaces, the switching of the connection joint 100 between the locked and unlocked states becomes easier.

[0048] Specifically, as Figure 1 、 3 、4, 7, and 8 show, a limiting baffle 26 is further provided on the locking spring 20 of the present application, a limiting strip 12 is provided in the middle of the jack 11, and when the first limiting block 22 disengages from the limit of the third guiding inclined surface 321 of the retaining platform 32, the limiting baffle 26 can abut against the limiting strip 12 of the joint body 10 to limit the further insertion of the locking spring 20 into the joint body 10. In this way, on the basis of satisfying the assembly of the locking spring 20 on the joint body 10, when people unlock the connection joint 100 and the mating joint 200 later, the unlocking tool can be used to lift the limiting baffle 26 to achieve the unlocking of the locking spring 20 on the joint body 10.

[0049] It can be understood that the cooperation of the limiting baffle 26 and the limiting strip 12 can prevent the locking spring 20 from being inserted into the joint body 10 excessively, and can shield the jack 11 on the joint body 10, making the joint body 10 have better sealing performance, more beautiful appearance, reducing the probability of foreign objects entering the inside of the joint body 10, and the mating joint 200 can also be better protected.

[0050] Among them, on the limit baffle 26 of the present application, there is a partial protrusion in the direction away from the joint body 10 and a warping part 261 is formed, for the unlocking tool to be inserted into the position where the warping part 261 is located, and to realize the warping of the limit baffle 26, so as to facilitate the unlocking of the connection joint 100 and the mating joint 200 after being fully assembled in place. It should be noted that the above unlocking tool can be set to have a structure with a flat head, and the flat head can be inserted into the warping part 261.

[0051] Specifically, as Figure 7 、 8 shown, the lock spring 20 further includes a second limit block 24, which is arranged at the end of the lock spring 20 away from the limit baffle 26. When the first limit block 22 abuts against the retaining table 32, the second limit block 24 can abut against the second transition arc surface 323 of the retaining table 32 in the circumferential direction of the fixed ring 30.

[0052] It can be understood that the second limit block 24 can prevent the first limit block 22 of the lock spring 20 from sliding to the inner side wall of the fixed ring 30.

[0053] Specifically, as Figure 1 、 3 、4, 7, 8 shown, the lock spring 20 further includes a locking plate 25. The mating joint 200 is provided with an annular groove 201 in the circumferential direction, and the lock spring 20 can be clamped to the annular groove 201 of the mating joint 200 through the locking plate 25 to lock the mating joint 200 to the joint body 10; wherein, a first sliding groove 13 for matching the locking plate 25 is formed on the joint body 10. Guided by the cooperation between the locking plate 25 and the first sliding groove 13, the lock spring 20 is guided to be inserted into the jack 11 of the joint body 10. Specifically, the locking plate 25 is provided with a fifth guiding inclined surface 252, and the mating joint 200 can be abutted against the locking plate 25 through the guiding of the fifth guiding inclined surface 252.

[0054] It can be understood that the mating joint 200 is provided with an annular groove 201, which is a common joint in the prior art. The locking function is realized through the cooperation of the locking plate 25 and the annular groove 201 to prevent the mating joint 200 from having a radial displacement. The first sliding groove 13 can provide a guiding function for the insertion of the lock spring 20, and can also prevent the locking plate 25 from having a displacement along the axial direction of the joint body when the mating joint is inserted.

[0055] Specifically, as Figure 1 、 3 -6 shown, the joint body 10 is further provided with a second sliding groove 14 for matching the elastic strip 21. Guided by the cooperation between the elastic strip 21 and the second sliding groove 14, the lock spring 20 is guided to be inserted into the jack 11 of the joint body 10.

[0056] It can be understood that the second chute 14 can provide a guiding function for the insertion of the locking spring 20, preventing the elastic strip 21 from displacing axially along the joint body when the mating joint 200 is inserted, so that it can only undergo radial elastic deformation.

[0057] Specifically, as Figure 7 、 8 shown, the locking plate 25 is provided with a fifth guiding inclined surface 252, and the mating joint 200 can be abutted against the locking plate 25 under the guidance of the fifth guiding inclined surface 252.

[0058] It can be understood that the fifth guiding inclined surface 252 makes the abutting fit between the mating joint 200 and the locking plate 25 smoother. Before the locking plate 25 is engaged with the annular groove 201, since the mating joint 200 abuts against the locking plate 25, the locking spring 20 can never reach the locking position.

[0059] Specifically, as Figures 5 - 8 shown, a guiding rib 19 is provided between the first chute 13 and the second chute 14. The guiding rib 19 is provided with a sixth guiding inclined surface 191 at the proximal end along the insertion direction. A guiding protrusion 251 is provided on one side of the locking plate 25 close to the elastic strip 21, and the sixth guiding inclined surface 191 guides the guiding protrusion 251 to be abutted and fitted on the guiding rib 19.

[0060] It can be understood that the cooperation between the guiding protrusion 251 and the sixth guiding inclined surface 191 can make it easier to find the correct insertion position when inserting the locking spring 20, and after insertion, the guiding protrusion 251 also always abuts against the guiding rib 19, so that the locking spring 20 can always be kept in the correct position.

[0061] Specifically, as Figure 5 、 6 、9, 10 shown, a convex buckle 33 is provided on the outer peripheral wall of the fixing ring 30, and a buckle groove 15 for matching the convex buckle 33 is opened on the inner peripheral wall of the joint body 10. The fixing ring 30 can be snap-fitted to the joint body 10 through the cooperation between the convex buckle 33 and the buckle groove 15, so as to specifically realize the assembly connection between the fixing ring 30 and the joint body 10, so as to facilitate the installation of the fixing ring 30 onto the joint body 10. It can be understood that there can be multiple convex buckles 33 and buckle grooves 15. In this example, both the convex buckle 33 and the buckle groove 15 are two.

[0062] Specifically, as Figures 1 - 4As shown in the figure, the first sealing ring 40, spacer ring 50, and second sealing ring 60 of the present application are successively installed in the joint body 10. The mating joint 200 can cooperate with the joint body 10 and simultaneously squeeze the first sealing ring 40 and the second sealing ring 60 to deform, so that when the connecting joint 100 is inserted and mated with the mating joint 200, it can play a dual-sealing role to meet the use requirements of the assembly seal between the connecting joint 100 and the mating joint 200.

[0063] Specifically, a limiting step 51 is provided on the spacer ring 50, and a step surface 16 for matching the limiting step 51 is provided on the joint body 10. The spacer ring 50 can be installed into the joint body 10 until the limiting step 51 on the spacer ring 50 abuts against the step surface 16, that is, the assembly position of the spacer ring 50 on the joint body 10 is determined. In this way, the area size on the joint body 10 for assembling the first sealing ring 40 and the second sealing ring 60 is larger than the corresponding first sealing ring 40 and second sealing ring 60, so as to provide corresponding deformation space for the corresponding first sealing ring 40 and the corresponding second sealing ring 60. It should be noted that a first limiting boss 17 and a second limiting boss 18 are also formed on the inner peripheral wall of the joint body 10 of the present application. The first limiting boss 17 can abut against the first sealing ring 40 to limit the first sealing ring 40 to the position between the first limiting boss 17 and the spacer ring 50, and the second limiting boss 18 can abut against the fixing ring 30 to limit the second sealing ring 60 to the position between the spacer ring 50 and the fixing ring 30, so as to meet the use requirements of the first sealing ring 40 and the second sealing ring 60 being compressed and deformed.

[0064] The working principle of the connecting joint of the present application is as follows: During assembly, first install the fixing ring 30 on the inner side wall of the joint body 10, and then insert the lock spring 20 into the joint body 10 and the fixing ring 30. Due to the abutting and limiting of the first limiting block 22 and the retaining table 32, the lock spring is in the pre-installed position. Then, insert the mating joint 200 into the fixing ring 30. After pushing it to the abutting block 23, the elastic strip 21 of the lock spring 20 undergoes radial elastic deformation, the first limiting block 22 is disengaged from the limiting of the retaining table 32, and the locking plate 25 abuts against the mating joint 200 until it is engaged with the annular groove 201, and the lock spring is in the locked position to achieve locking. During disassembly, insert the unlocking tool into the lifting portion 261 to lift it upward, the elastic strip 21 undergoes radial elastic deformation, the lock ring returns from the locked position to the pre-installed position, and the mating joint 200 is taken out from the fixing ring 30.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0066] The embodiments described above merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A connecting joint, used for connecting a mating joint (200); characterized in that: The connecting joint comprises: A connector body (10), wherein a plug hole (11) is formed on the connector body (10); A lock spring (20), the lock spring (20) comprising an elastic strip (21), a first limit block (22) and a push block (23), wherein the first limit block (22) and the push block (23) are arranged on the elastic strip (21); A fixing ring (30), the fixing ring (30) being arranged in the joint body (10), the fixing ring (30) being provided with an avoidance hole (31) on the circumference thereof for avoiding the insertion of the locking spring (20), and a stopper (32) being provided at a position away from the insertion hole (11); The locking spring (20) can drive the first limiting block (22) to be inserted into the connector body (10) and the fixing ring (30) through the insertion hole (11) and the avoidance hole (31) until it abuts against the stopper (32); the mating connector (200) can push the push block (23) to cause the elastic strip (21) to undergo elastic deformation, thereby driving the first limiting block (22) to move away from the limit of the stopper (32) at the proximal end along the insertion direction; and then the locking spring (20) is further inserted into the connector body (10) and the fixing ring (30) to lock the mating connector (200).

2. The connection joint according to claim 1, characterized in that: The push block (23) is provided with a push inclined surface (231), and the matching joint (200) can push the push block (23) through the push inclined surface (231) to cause the elastic strip plate (21) to undergo radial elastic deformation.

3. The connection joint according to claim 1, characterized in that: The first limit block (22) is provided with a first guiding bevel (221) at the proximal end along the insertion direction, and a second guiding bevel (222) at the distal end; the stop platform (32) is provided with a third guiding bevel (321) at the proximal end along the insertion direction, and a fourth guiding bevel (322) at the distal end; a first transition arc surface (223) is provided between the first guiding bevel (221) and the second guiding bevel (222), and a second transition arc surface (323) is provided between the third guiding bevel (321) and the fourth guiding bevel (322).

4. The connection joint according to claim 1, characterized in that: The locking spring (20) further comprises a limit baffle (26), wherein the limit baffle (26) and the first limit block (22) are respectively arranged on both sides of the elastic strip (21); and when the first limit block (22) is separated from the limit of the proximal end of the stop platform (32) along the insertion direction, the limit baffle (26) can abut against the joint body (10).

5. The connection joint according to claim 1, characterized in that: The locking spring (20) further comprises a second limiting block (24), and when the first limiting block (22) abuts against the stop platform (32), the second limiting block (24) can abut against the stop platform (32) in the circumferential direction of the fixing ring (30).

6. The connection joint according to claim 1, characterized in that: The locking spring (20) further comprises a locking plate (25), the mating joint (200) is provided with an annular groove (201) in the circumferential direction, and the locking spring (20) can be clamped in the annular groove (201) of the mating joint (200) through the locking plate (25) so as to lock the mating joint (200) to the joint body (10); wherein, the joint body (10) is provided with a first sliding groove (13) for matching the locking plate (25), and the locking spring (20) is guided to be inserted into the insertion hole (11) of the joint body (10) by the matching between the locking plate (25) and the first sliding groove (13).

7. The connection joint according to claim 6, characterized in that: The joint body (10) is also provided with a second slide groove (14) for matching the elastic strip (21), and the locking spring (20) is guided to be inserted into the insertion hole (11) of the joint body (10) by the cooperation between the elastic strip (21) and the second slide groove (14).

8. The connection joint according to claim 6, characterized in that: The locking plate (25) is provided with a fifth guiding inclined surface (252), and the mating joint (200) can abut against the locking plate (25) under the guidance of the fifth guiding inclined surface (252).

9. The connection joint according to claim 7, characterized in that: A guide rib (19) is provided between the first slide groove (13) and the second slide groove (14); a sixth guide slope (191) is provided at the proximal end of the guide rib (19) along the insertion direction; a guide protrusion (251) is provided on the side of the locking plate (25) close to the elastic strip (21); the sixth guide slope (191) guides the guide protrusion (251) to cooperate and abut against the guide rib (19).

10. The connection joint according to any one of claims 1 to 9, characterized in that: The connecting joint (100) further comprises a first sealing ring (40), a spacer ring (50) and a second sealing ring (60), wherein the first sealing ring (40), the spacer ring (50) and the second sealing ring (60) are sequentially embedded in the joint body (10), and the mating joint (200) is capable of mating with the joint body (10) and simultaneously squeezing the first sealing ring (40) and the second sealing ring (60) to deform.

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