Double lock quick connect device

Abstract

The present invention discloses a quick connection device with double locks, including a connection sleeve with a male plug inserted therein, a locker and a locking sleeve connected to the locker arranged in the connection sleeve, the locker comprising a push plate, a first clamping strip and a second clamping strip arranged at the upper end of the push plate, a first limit block and a second limit block arranged between the two clamping strips, and a first positioning rod and a second positioning rod arranged at the lower end of the push plate. The present invention provides a locker and a locking sleeve on the connection sleeve, which not only protects the fixation of the male plug, but also can realize automatic locking of the male plug, and at the same time facilitates observation of the installation status, avoids the occurrence of installation falling off, has a simple structure, and is convenient for disassembly and assembly.

Description

Technical Field

[0001] The invention relates to the field of automobile parts manufacturing, and in particular to a quick connection device with double locks. Background Art

[0002] At present, the quick-connect devices widely used in automobile fuel and new energy pipeline systems mainly adopt a single locking mechanism. Usually, the single locking mechanism connection device does not have the functions of automatic locking and error prevention during the assembly process, and the safety is poor. The single locking mechanism connection device is unlocked by external forces (vibration, flying stones, etc.) during operation, which may cause a high risk of leakage in the pipeline system. The single locking mechanism connection device does not have the functions of automatic locking and error prevention during the assembly process, which can easily lead to improper installation and affect driving safety. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a quick connection device of a double lock which is convenient for both disassembly and assembly and for checking the installation status.

[0004] The technical solution of the present invention is as follows:

[0005] A quick connection device with double locks, comprising a connection sleeve with a male plug inserted therein, a notch provided on one side of the connection sleeve, a lock provided on the connection sleeve, a first cavity, a second cavity and a third cavity provided in the connection sleeve from top to bottom, a locking sleeve connected to the lock provided in the third cavity, an insertion hole provided on one side of the first cavity, a position limiting hole provided on the other side, a notch groove provided on the bottom of the first cavity, a mounting hole provided on one side of the second cavity, a clearance hole provided on the other side, a position corresponding to the mounting hole in the second cavity A guide block is provided at the location, and a positioning protrusion is provided on one side of the corresponding yield hole; the lock includes a push plate provided with a guide hole, a first clamping strip and a second clamping strip are provided at the upper end of the push plate, a first limit block and a second limit block are provided between the two clamping strips, and a first positioning rod and a second positioning rod are provided at the lower end of the push plate, the two clamping strips are both extended into the first cavity, and the corresponding position on each clamping strip is extended into the limiting hole at the corresponding end, the two positioning rods and the limit block are both extended into the second cavity, and the corresponding positions on the two positioning rods are engaged and positioned with the positioning protrusions at the corresponding ends.

[0006] With the above structure, when the lock is inserted into the connecting sleeve, the first positioning rod and the second positioning rod are inserted from the mounting hole position, and then the first limit block and the second limit block are also inserted into the second cavity from the mounting hole position, and the first clamping strip and the second clamping strip are inserted into the first cavity from the insertion hole position, and the corresponding positions on the clamping strips extend into the limiting holes at the corresponding ends to prevent the lock from falling off; after the male plug is inserted, the boss on the male plug moves from top to bottom and squeezes the corresponding positions on the two positioning rods, and the two positioning rods open accordingly. After the male plug is inserted into place, the two positioning rods move back and move along the outer side surface of the male plug, and make the corresponding positions on the limit blocks fit and limit with the outer side wall of the male plug and the corresponding positions of the bosses, and the corresponding positions on the two positioning rods are clamped and positioned with the positioning protrusions at the corresponding ends, so as to realize the functions of automatic locking and error prevention; at the same time, the locking sleeve is also clamped and fixed with the third cavity, and the locking sleeve and the lock The tightener fits well, and while ensuring that the lock does not fall off, it can also determine whether the male plug is installed in place; if the male plug is not installed in place, one situation is that when the two positioning rods are in an open state compared to the initial position in the two limit holes, the locker is loose and the locking sleeve cannot be snapped into place. Another situation is that the boss of the male plug passes the position of the positioning rod, but the positioning rod is not snapped into place. From the outside of the connecting sleeve, it can be seen that the two positioning rods are open outward, that is, the male plug is loose, and the locking sleeve still cannot be snapped into place. The position of the two limit holes is convenient for checking the installation status; when disassembling, first pull out the snap-fit ​​locking sleeve at the third cavity position, and then directly open the two positioning rods from the disassembly hole position to make the positioning rod leave the positioning protrusion, then pull the boss position of the male plug out of the positioning rod position, and finally loosen the two positioning rods. The structure is simple and compact, and the entire disassembly and assembly process is simple and fast.

[0007] In order to simplify the structure, preferably, two limiting holes are symmetrically provided on the left and right sides of the middle part of the first cavity.

[0008] In order to simplify the structure and facilitate limiting, preferably, the first clamping strip and the second clamping strip both extend horizontally from the upper end of the push plate, and two stoppers are symmetrically provided on the two clamping strips, and the two stoppers extend into the limiting holes at the corresponding ends.

[0009] In order to improve the force strength, as a preference, a first fixed block and a second fixed block are symmetrically provided on the left and right at the positions between the two clamping strips on the push plate, a first limit block extending horizontally is provided at the lower end of the first fixed block, and a second limit block extending horizontally is provided at the lower end of the second fixed block, and the end faces of the extended ends of the two limit blocks are provided with a circular arc surface, and the two circular arc surfaces form a semicircular arc shape; a downwardly extending extension section is provided on the lower end faces of the first limit block and the second limit block, and an arc surface section is provided on each of the extension sections corresponding to the extending direction of the limit block; a reinforcing block is provided between the fixed block and the limit block at the corresponding end.

[0010] In order to improve the installation stability, preferably, the upper end surfaces of the two limit blocks are flush with the upper end surfaces of the two positioning rods.

[0011] In order to better ensure the convenience of disassembly and assembly, it is preferred that upper and lower penetrating grooves are provided on the fixed block, the limit block and the extension section at the corresponding ends, and the grooves at both ends are symmetrically arranged and enclosed to form a notch structure; a clearance groove is provided at the position of the notch structure corresponding to the bottom of the first cavity and the second cavity, and the two clearance grooves are connected to the notch structure.

[0012] In order to simplify the structure, preferably, the first positioning rod and the second positioning rod are both extended horizontally from the lower end of the push plate, and the extended end of each positioning rod is provided with a bending section, and each positioning rod is provided with a protrusion, and the upper end surface of each protrusion is provided with a transition inclined surface, and the bending sections, protrusions and corresponding positions of the positioning rods at the corresponding ends are combined to form a slot; a connecting block is provided in the second cavity, and two positioning protrusions are symmetrically provided on the left and right of the connecting block, and the slots at the corresponding ends are engaged with the positioning protrusions for positioning.

[0013] In order to achieve automatic sliding and locking in place, preferably, the outer side wall of each of the protrusions includes a first oblique straight section, the highest end of the first oblique straight section is connected to a second oblique straight section, the lowest end of the second oblique straight section is connected to an arc section, and the lowest end of the arc section is connected to the corresponding position of the inner side wall of the corresponding end positioning rod.

[0014] In order to simplify the structure and facilitate installation and orientation, preferably, a limiting boss is provided in the third cavity, a transition hole for penetrating the male plug is provided on the limiting boss, two first clamping protrusions and two second clamping protrusions are symmetrically provided on the limiting boss, the outer wall of the limiting boss and the first clamping protrusion and the second clamping protrusion at the corresponding end are combined to form a limiting slot; the locking sleeve comprises a limiting plate and two connecting plates arranged on the limiting plate, an extension section is provided on the edge of the limiting plate, a guide rod is provided at the position of the limiting plate corresponding to the guide hole, and a clamping block is provided on each of the connecting plates; when in use, the limiting plate is pushed so that the guide rod extends into the guide hole, and the extending end of the guide rod is located above the boss of the male plug to limit the male plug, and at the same time, the connecting plate is driven to move, and the clamping block at the corresponding end moves out of the limiting slot and abuts against the outer side of the first clamping protrusion for positioning, while the extension section moves synchronously and abuts against the outer wall of the notch position of the connecting sleeve, and the outer wall of the limiting plate is flush with the outer wall of the connecting sleeve.

[0015] In order to facilitate smoother insertion and movement of the connecting plate, preferably, a first yielding inclined surface is provided on the groove wall corresponding to the first engaging protrusion in the limiting groove, and a second yielding inclined surface is provided on the groove wall corresponding to the second engaging protrusion in the limiting groove.

[0016] Beneficial effects: The present invention provides a locker and a locking sleeve on the connecting sleeve, which not only protects the fixation of the male plug, but also can realize automatic locking of the male plug, and also facilitates observation of the installation status to avoid the occurrence of installation falling off. The structure is simple and the disassembly and assembly are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of the installation of the present invention.

[0018] Figure 2 Schematic diagram of the structure of the first cavity.

[0019] Figure 3 Schematic diagram of the structure of the second cavity.

[0020] Figure 4 Schematic diagram of the structure of the third cavity.

[0021] Figure 5 A schematic diagram of the structure of the lock.

[0022] Figure 6 for Figure 5 Bottom view of .

[0023] Figure 7 for Figure 5 Top view of the .

[0024] Figure 8 for Figure 7 AA section view in.

[0025] Fig. 9 It is a schematic diagram of the structure of the locking ferrule.

[0026] Fig.10 It is a schematic diagram of the installation process of the first cavity and the second cavity.

[0027] Fig.11 Schematic diagram of the installation process of the third cavity.

[0028] Fig.12 It is a schematic diagram of the structure of the present invention in use state.

[0029] Fig.13 It is a schematic diagram of the installation structure of the present invention.

[0030] Fig.14 for Fig.13 Bottom view of . DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Depend on Figures 1 to 14As shown, the present invention comprises a connection sleeve 1 with a male plug inserted therein, a locker is arranged in the connection sleeve 1, a first cavity 11, a second cavity 12 and a third cavity 15 are arranged in sequence from top to bottom in the connection sleeve 1, an insertion hole 21 is arranged on one side of the first cavity 11, two limiting holes 23 are symmetrically arranged on the left and right sides of the middle of the first cavity 11, and a notch groove is arranged at the bottom of the first cavity 11,

[0033] The second cavity 12 has a mounting hole 121 on one side and a clearance hole 122 on the other side. A guide block 22 is provided at a position corresponding to the mounting hole 121 in the second cavity 12, and a positioning protrusion 13 is provided on one side corresponding to the clearance hole 122.

[0034] The lock includes a push plate 3, at the upper end of which a first clamping strip 31 and a second clamping strip 32 extending horizontally are provided, and two stoppers 33 are symmetrically provided on the two clamping strips. The two stoppers 33 extend into the limiting holes 23 at the corresponding ends to prevent the lock from falling off.

[0035] A first fixed block 441 and a second fixed block 442 are symmetrically arranged on the left and right at the position between the two clamping strips on the push plate 3, a first limit block 41 extending horizontally is arranged at the lower end of the first fixed block 441, and a second limit block 42 extending horizontally is arranged at the lower end of the second fixed block 442, and the end faces of the extended ends of the two limit blocks are each provided with an arc surface, and the two arc surfaces form a semicircular arc shape; a downwardly extending extension section 55 is arranged on the lower end faces of the first limit block 41 and the second limit block 42, and a arc surface section is arranged on each of the extension sections 55 corresponding to the extending direction of the limit block; a reinforcing block 45 is arranged between the fixed block and the limit block at the corresponding end.

[0036] The upper end surfaces of the two limit blocks are flush with the upper end surfaces of the two positioning rods.

[0037] The fixing block, the limiting block and the extension section at the corresponding ends are provided with grooves that penetrate upward and downward, and the grooves at both ends are symmetrically arranged and enclose a notch structure; a clearance groove 14 is provided at the position of the cavity bottom corresponding to the notch structure of the first cavity 11 and the second cavity 12, and the two clearance grooves 14 are connected to the notch structure.

[0038] The lower end of the push plate 3 is provided with a first positioning rod 51 and a second positioning rod 52 extending horizontally, and the extending end of each positioning rod is provided with a bending section 53, and each positioning rod is provided with a protrusion, and the upper end surface of each protrusion is provided with a transition inclined surface 541, and the bending section 53, the protrusion and the corresponding position of the positioning rod at the corresponding end are combined to form a slot; a connecting block is provided in the second cavity 12, and two positioning protrusions 13 are symmetrically provided on the left and right of the connecting block, and the slots at the corresponding ends are engaged with the positioning protrusions 13 for positioning.

[0039] The outer side wall of each protrusion includes a first oblique straight section 542, the highest end of which is connected to a second oblique straight section 543, and the lowest end of which is connected to an arc section 544, and the lowest end of which is connected to the corresponding position of the inner side wall of the corresponding end positioning rod.

[0040] A limiting boss 151 is provided in the third cavity 15, and a transition hole 152 for penetrating a male plug is provided on the limiting boss 151, and two first clamping protrusions 161 and two second clamping protrusions 162 are symmetrically provided on the limiting boss 151, and the outer wall of the limiting boss 151 and the first clamping protrusion 161 and the second clamping protrusion 162 at the corresponding end are surrounded to form a limiting slot 163; the locking sleeve includes a limiting plate 61 and two connecting plates 63 arranged on the limiting plate 61, an extension section 62 is provided on the edge of the limiting plate 61, a guide rod 611 is provided at a position on the limiting plate 61 corresponding to the guide hole 30, and a clamping block 64 is provided on each of the connecting plates 63.

[0041] When in use, the limiting plate 61 is pushed to make the guide rod 611 extend into the guide hole 30, and the extending end of the guide rod 611 is located above the boss of the male plug to limit the male plug, and at the same time, the connecting plate 63 is driven to move, and the card block 64 at the corresponding end moves out of the limiting card groove 163 and abuts against the outer side of the first card protrusion 161 for positioning, and the extension section 62 moves synchronously and abuts against the outer wall of the notch position of the connecting sleeve 1, and the outer side wall of the limiting plate 61 is flush with the outer wall of the connecting sleeve 1.

[0042] A first compliant inclined surface 171 is disposed on the groove wall of the limiting groove 163 corresponding to the first engaging protrusion 161 , and a second compliant inclined surface 172 is disposed on the groove wall of the limiting groove 163 corresponding to the second engaging protrusion 162 .

[0043] The method of use of the present invention is as follows:

[0044] like Figures 1 to 12As shown, when the lock is inserted into the connecting sleeve 1, the first positioning rod 51 and the second positioning rod 52 are inserted from the mounting hole 121, and then the first limit block 41 and the second limit block 42 are also inserted into the second cavity 12 from the mounting hole 121, and the first clamping strip 31 and the second clamping strip 32 are inserted into the first cavity 11 from the insertion hole 21. The blocks 33 on the two clamping strips are respectively extended into the limit holes 23 at the corresponding ends, and the abutment between the block 33 and the wall of the limit hole 23 can prevent the lock from falling off.

[0045] After the male plug is inserted, the boss on the male plug moves from top to bottom and squeezes the transition inclined surfaces 541 on the two protrusions at the same time, and the first positioning rod 51 and the second positioning rod 52 move accordingly and form an open shape. After the male plug is inserted into place, that is, the boss position of the male plug moves down and leaves the transition inclined surface 541 position, while the two positioning rods move back, the second oblique straight section 543 of the outer wall of the protrusion fits the outer wall of the male plug and moves along the outer side surface of the male plug, and the corresponding end of the positioning rod is engaged and fixed with the positioning protrusion 13, and the arc section 544 fits the outer wall of the male plug. At the same time, the first limit block (41) and the second limit block 42 move to the top of the boss, and the arc surface of the protruding end of the two limit blocks fits the corresponding position of the outer wall of the male plug above the boss, and the arc section on the extension section 55 fits the outer wall of the boss, realizing the function of automatic locking and error prevention.

[0046] Finally, push the limit plate 61 to make the guide rod 611 extend into the guide hole 30, and make the extended end of the guide rod 611 be located above the boss of the male plug to limit the male plug, and at the same time drive the connecting plate 63 to move, and the block 64 at the corresponding end moves out of the limit slot 163 and abuts against the outer side of the first clamping protrusion 161 for positioning, while the extension section 62 moves synchronously and abuts against the outer wall of the notch position of the connecting sleeve 1, and the outer wall of the limit plate 61 is flush with the outer wall of the connecting sleeve 1; the first and second give-way slopes 171 and 171 are provided to help the block 64 to move obliquely and open, which is conducive to smoother movement of the connecting plate 63.

[0047] If the male plug is not installed in place, one situation is that when the two positioning rods are in an open state compared to the initial position in the two limiting holes, the lock is loose and the block 64 cannot be snapped into place; another situation is that the boss of the male plug passes the position of the positioning rod, but the positioning rod and the positioning protrusion 13 are not snapped into place. From the position of the disassembly hole 122 of the connecting sleeve 1, it can be seen that the two positioning rods are opened outward, that is, the male plug is loose, and the block 64 still cannot be snapped into place. The positions of the two limiting holes 23 are also convenient for checking the installation status to prevent the lock from loosening and slipping so as to replace the parts in time.

[0048] like Fig.10 and Fig.11As shown, when removing, first open the blocks 64 at both ends at the position of the third cavity 15, and pull out the limit plate 61, so that the block 64 moves into the limit slot 163. At the same time, the guide rod 611 leaves the top of the boss position of the male plug, and then directly open the two positioning rods from the disassembly hole 122 to make the positioning rod leave the positioning protrusion 13, and pull the boss position of the male plug out of the positioning rod position, and finally loosen the two positioning rods. The structure is simple and compact, and the entire disassembly and assembly process is simple and fast.

[0049] It should be noted that if Figure 3 , Figure 5 , Figure 6 , Fig.13 , Fig.14 as well as Fig.10 As shown in Figure e, the fixed block, the limit block and the extension section at the corresponding ends are provided with upper and lower penetrating grooves, and the grooves at both ends are symmetrically arranged and enclosed to form a notch structure. During installation, when the push plate 3 is pushed into place, the clearance groove 14 is connected with the notch structure. If it is stuck when the positioning rod is opened, the relevant auxiliary tool can be inserted in the connection position to assist in pulling the lock for auxiliary disassembly, which is also convenient for replacing related parts.

[0050] In addition, the first oblique straight section 542 is provided to assist the locking and positioning of the slot on the positioning rod on the one hand, and to reduce the contact area in the form of an inclined surface on the other hand, so as to reduce the disassembly resistance.

[0051] In order to ensure the strength in use and the elasticity requirements for assembly and disassembly, the lock is integrally injection-molded from nylon 66 material. The material is prior art and will not be described in detail here.

Claims

1. A quick connection device with a double lock, comprising a connection sleeve (1) with a male plug inserted therein, characterized in that: A notch is provided on one side of the connecting sleeve (1), a locker is provided on the connecting sleeve (1), a first cavity (11), a second cavity (12) and a third cavity (15) are provided in sequence from top to bottom in the connecting sleeve (1), a locking sleeve (6) connected to the locker is clamped in the third cavity (15), an insertion hole (21) is provided on one side of the first cavity (11), a limiting hole (23) is provided on the other side, a notch groove is provided at the bottom of the first cavity (11), a mounting hole (121) is provided on one side of the second cavity (12), a clearance hole (122) is provided on the other side, a guide block (22) is provided at a position corresponding to the mounting hole (121) in the second cavity (12), A positioning protrusion (13) is provided on one side of the positioning hole (122); the lock includes a push plate (3) provided with a guide hole (30), a first clamping strip (31) and a second clamping strip (32) are provided at the upper end of the push plate (3), a first limit block (41) and a second limit block (42) are provided between the two clamping strips, and a first positioning rod (51) and a second positioning rod (52) are provided at the lower end of the push plate (3), the two clamping strips are both extended into the first cavity (11), and the corresponding position on each clamping strip is extended into the limiting hole (23) at the corresponding end, the two positioning rods and the limit blocks are both extended into the second cavity (12), and the corresponding positions on the two positioning rods are engaged and positioned with the positioning protrusions (13) at the corresponding ends.

2. The quick connection device with double locks according to claim 1, characterized in that: Two limiting holes (23) are symmetrically arranged on the left and right sides of the middle of the first cavity (11).

3. A quick connection device with double locks according to claim 2, characterized in that: The first clamping strip (31) and the second clamping strip (32) both extend horizontally out of the upper end of the push plate (3), and two stoppers (33) are symmetrically arranged on the two clamping strips, and the two stoppers (33) extend into the limiting holes (23) at the corresponding ends.

4. The quick connection device with double locks according to claim 1, characterized in that: A first fixed block (441) and a second fixed block (442) are symmetrically arranged on the left and right at the positions between the two clamping strips on the push plate (3); a first limit block (41) extending horizontally is arranged at the lower end of the first fixed block (441); a second limit block (42) extending horizontally is arranged at the lower end of the second fixed block (442); the end faces of the extended ends of the two limit blocks are each provided with an arc surface, and the two arc surfaces form a semicircular arc shape; a downwardly extending extension section (55) is arranged at the lower end faces of the first limit block (41) and the second limit block (42); each of the extension sections (55) is provided with an arc surface section corresponding to the extending direction of the limit block; a reinforcing block (45) is arranged between the fixed block and the limit block at the corresponding end.

5. The quick connection device with double locks according to claim 4, characterized in that: The upper end surfaces of the two limit blocks are flush with the upper end surfaces of the two positioning rods.

6. The quick connection device with double locks according to claim 4, characterized in that: The fixing block, the limiting block and the extension section at the corresponding ends are provided with grooves that penetrate upward and downward, and the grooves at the two ends are symmetrically arranged and enclose a notch structure; a clearance groove (14) is provided at the position of the cavity bottom of the second cavity (12) corresponding to the notch structure, and the two clearance grooves (14) are both connected to the notch structure.

7. The quick connection device with double locks according to claim 1, characterized in that: The first positioning rod (51) and the second positioning rod (52) both extend horizontally from the lower end of the push plate (3), and each of the extending ends of the positioning rods is provided with a bending section (53), and each of the positioning rods is provided with a protrusion, and the upper end surface of each of the protrusions is provided with a transition inclined surface (541), and the bending sections (53) at the corresponding ends, the protrusions and the corresponding positions of the positioning rods are combined to form a slot; a connecting block is provided in the second cavity (12), and two positioning protrusions (13) are symmetrically provided on the left and right of the connecting block, and the slots at the corresponding ends are snap-fitted and positioned with the positioning protrusions (13).

8. The quick connection device with double locks according to claim 7, characterized in that: The outer side wall of each of the protrusions comprises a first oblique straight section (542), the highest end of the first oblique straight section (542) is connected to a second oblique straight section (543), the lowest end of the second oblique straight section (543) is connected to an arc section (544), and the lowest end of the arc section (544) is connected to a corresponding position of the inner side wall of the corresponding end positioning rod.

9. The quick connection device with double locks according to claim 1, characterized in that: A limiting boss (151) is provided in the third cavity (15), a transition hole (152) for penetrating a male plug is provided on the limiting boss (151), two first clamping protrusions (161) and two second clamping protrusions (162) are symmetrically provided on the limiting boss (151), and an outer wall of the limiting boss (151) and the first clamping protrusion (161) and the second clamping protrusion (162) at the corresponding end are combined to form a limiting slot (163); the locking sleeve comprises a limiting plate (61) and two connecting plates (63) arranged on the limiting plate (61), an extension section (62) is provided on the edge of the limiting plate (61), and the limiting plate (61) is provided with a connecting plate (63) on the connecting plate (63). A guide rod (611) is provided at a position corresponding to the guide hole (30), and a clamping block (64) is provided on each of the connecting plates (63); when in use, the limiting plate (61) is pushed to allow the guide rod (611) to extend into the guide hole (30), and the extending end of the guide rod (611) is located above the boss of the male plug to limit the male plug, while the connecting plate (63) is also driven to move, and the clamping block (64) at the corresponding end moves out of the limiting slot (163) and abuts against the outer side of the first clamping protrusion (161) for positioning, while the extension section (62) moves synchronously and abuts against the outer wall of the notch position of the connecting sleeve (1), and the outer side wall of the limiting plate (61) is flush with the outer wall of the connecting sleeve (1).

10. The quick connection device with double locks according to claim 9, characterized in that: A first yielding inclined surface (171) is provided on the groove wall corresponding to the first engaging protrusion (161) in the limiting groove (163), and a second yielding inclined surface (172) is provided on the groove wall corresponding to the second engaging protrusion (162) in the limiting groove (163).

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