Automobile fuel pipe quick connector

Abstract

The utility model discloses a quick connector for automobile fuel pipe, including a male head and a female head, wherein a male head check assembly is arranged in the outlet end of the male head, and a female head check assembly is arranged in the inlet end of the female head, wherein the female head check assembly and the male head check assembly are arranged opposite to each other, and when the male head and the female head are connected, the female head check assembly and the male head check assembly are mutually unlocked. The utility model overcomes the shortcomings of the prior art, has a reasonable design, and a compact structure, and realizes the locking of the limit sleeve itself after the limit sleeve locks the steel ball by respectively arranging matching clamps and L-shaped locking grooves on the inner side of the limit sleeve and the outer wall of the male head, thereby avoiding the retraction of the limit sleeve caused by vibration during driving, thereby avoiding safety hazards such as oil leakage caused by disconnection of the oil pipe connection, and has high social use value and application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pipe joints, in particular to a quick joint for an automobile fuel pipe. Background Art

[0002] Fuel pipe joints are joints that connect fuel pipes and other fuel system components (such as fuel pumps, fuel filters, fuel injectors, etc.) to transfer fuel in automobiles or other mechanical equipment. These joints usually have special designs to ensure the sealing and safety of the fuel system. During automobile repair and maintenance, fuel pipe joints may need to be inspected, replaced or maintained.

[0003] The patent with publication number CN208687199U discloses a pipe quick connector for high-pressure oil pipe cleaning equipment, including a plug and a socket, which are respectively connected to the pipes to be connected, the plug is a stepped connector body that is machined and integrally formed, a snap-fit ​​groove is provided in the middle section of the connector body, and a limiting boss is provided at the lower end near the snap-fit ​​groove, the socket includes a socket tube body, a snap-fit ​​sleeve slidably sleeved on the outer periphery of the upper end of the socket tube body, a self-locking spring provided between the snap-fit ​​sleeve and the socket tube body, and a snap-fit ​​assembly.

[0004] The above device can quickly connect the water outlet pipe of the cleaning equipment with the water spray pipe through the pipe quick connector. However, the vibration of the device during driving can cause the clamping sleeve to offset the elastic force of the self-locking spring and retract on the socket pipe body, causing the clamping ball to fall out of the clamping groove, thereby disconnecting the oil pipe connection, causing safety hazards such as oil leakage. For this reason, we propose an automobile fuel pipe quick connector. Summary of the invention

[0005] In order to solve the potential safety hazard problem mentioned in the above background technology, the utility model provides a quick connector for an automobile fuel pipe.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A quick connector for a fuel pipe of an automobile, comprising a male head and a female head, wherein a male head check assembly is arranged in the outlet end of the male head, and a female head check assembly is arranged in the inlet end of the female head, wherein the female head check assembly is arranged opposite to the male head check assembly, and when the male head and the female head are connected, the female head check assembly and the male head check assembly are mutually unlocked;

[0008] The outer wall of the inlet end of the female head is provided with a plurality of movable grooves distributed in a ring array and connected to the inside of the female head, each of the movable grooves has a steel ball, the diameter of one end of the movable groove close to the inner side of the female head is slightly smaller than the diameter of the steel ball, and the diameter of the steel ball is larger than the wall thickness of the inlet end of the female head, the inlet end of the female head is externally sleeved with a limit sleeve for squeezing the steel ball to move toward the inside of the female head, and the outside of the female head is externally sleeved with a first spring with two ends respectively connected to the outer wall of the female head and the inner wall of the limit sleeve;

[0009] An annular groove for cooperating with the steel ball to lock the male head and the female head is provided at a position on the outer wall of the male head corresponding to the steel ball, and at least three clamps distributed in a circular array are fixedly connected to the inner side of the limiting sleeve away from the end of the first spring, and L-shaped locking grooves are provided at positions on the outer wall of the male head corresponding to the clamps, and a protrusion for limiting the clamps from slipping is provided at a position on the inner side of the L-shaped locking groove corresponding to the lock mouth.

[0010] Preferably, a first sealing ring is provided at a position inside the inlet end of the female connector corresponding to the butt joint position with the outlet end of the male connector.

[0011] Preferably, the inner side of the inlet end of the male head has a thread groove, and the outlet end of the female head has a threaded joint.

[0012] Preferably, the male head check assembly includes a check valve core, a retaining frame, an annular retaining seat and a second spring, the check valve core moves along the male head axis direction and is located on the inner side of the male head, the retaining frame moves along the male head axis direction, is located on the inner side of the male head and is clamped on the end of the check valve core away from the male head outlet end, the annular retaining seat is clamped on the inner wall of the male head near the inlet end, the second spring is arranged between the retaining frame and the annular retaining seat and the two ends are respectively connected to the retaining frame and the annular retaining seat, the edge of one end of the check valve core close to the male head outlet end abuts against the inner wall of the male head outlet end and the center position protrudes from the outlet end of the male head.

[0013] Preferably, a second sealing ring in contact with the inner wall of the male head is embedded on the outer wall of the check valve core.

[0014] Preferably, the female check assembly and the male check assembly are arranged in opposite positions and have the same configuration.

[0015] Preferably, the outer wall of the inlet end of the male plug has six first angle surfaces distributed in a circular array.

[0016] Preferably, the outer wall of the outlet end of the female connector has six second angle surfaces distributed in a circular array.

[0017] Preferably, the outer wall of the limiting sleeve has friction patterns.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] The utility model overcomes the shortcomings of the prior art and has a reasonable design and a compact structure. By respectively arranging matching clamping heads and L-shaped locking grooves on the inner side of the limit sleeve and the outer wall of the male head, the limit sleeve itself is locked after the limit sleeve locks the steel ball, thereby avoiding the limit sleeve from retracting due to vibration during driving, thereby avoiding safety hazards such as oil leakage caused by disconnection of the oil pipe, and has high social use value and application prospects.

[0020] The male head and the female head in the utility model are provided with check components arranged relatively to each other, which trigger and unlock each other after the male head and the female head are connected to each other, so that the oil pipe is connected, and the male head and the female head can be automatically closed when disassembled to prevent oil leakage in both sections of the oil pipe, which is more practical.

[0021] In the utility model, since six angle surfaces are provided on the outer walls of the male head and the female head to form a hexagonal nut shape, and friction patterns are provided on the outer wall of the limit sleeve, it is convenient to apply force during operation, and even with the help of tools, the problem of the connector being locked due to aging can be solved, thereby further improving its practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model cut along the axis;

[0025] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 4 for Figure 1 Schematic diagram of the enlarged structure at point B.

[0027] In the figure:

[0028] Male head; 11, thread groove; 12, L-shaped lock groove; 13, first angle surface; 14, ring groove;

[0029] Female head; 21, threaded joint; 22, movable groove; 23, steel ball; 24, limit sleeve; 241, clamp head; 242, friction pattern; 25, first spring; 26, first sealing ring; 27, second angle surface;

[0030] 3. Head check assembly;

[0031] 31. Check valve core; 311. Second sealing ring; 32. Retaining frame; 33. Annular seat; 34. Second spring;

[0032] 4. Female check assembly. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0034] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 A quick connector for a fuel pipe of an automobile comprises a male connector 1 and a female connector 2. A male connector check assembly 3 is arranged in the outlet end of the male connector 1, and a female connector check assembly 4 is arranged in the inlet end of the female connector 2. The female connector check assembly 4 is arranged opposite to the male connector check assembly 3, and is unlocked from the male connector check assembly 3 when the male connector 1 and the female connector 2 are connected.

[0035] A plurality of movable grooves 22 are arranged on the outer wall of the inlet end of the female head 2 and are distributed in a circular array and are connected to the inside of the female head 2. There are steel balls 23 in the movable grooves 22. The diameter of the end of the movable groove 22 close to the inner side of the female head 2 is slightly smaller than the diameter of the steel balls 23. The diameter of the steel balls 23 is larger than the wall thickness of the inlet end of the female head 2. A limiting sleeve 24 for squeezing the steel balls 23 to move toward the inside of the female head 2 is mounted on the outside of the inlet end of the female head 2. A first spring 25 is mounted on the outside of the female head 2, and its two ends are respectively connected to the outer wall of the female head 2 and the inner wall of the limiting sleeve 24.

[0036] An annular groove 14 for cooperating with the steel ball 23 to lock the male head 1 and the female head 2 is provided at a position corresponding to the steel ball 23 on the outer wall of the male head 1. At least three clamps 241 distributed in a circular array are fixedly connected to the inner side of the limiting sleeve 24 away from the end of the first spring 25. L-shaped locking grooves 12 are provided at positions corresponding to the clamps 241 on the outer wall of the male head 1. A protrusion 121 for limiting the slipping of the clamps 241 is provided at a position corresponding to the lock mouth on the inner side of the L-shaped locking groove 12.

[0037] By respectively arranging matching clamping heads 241 and L-shaped locking grooves 12 on the inner side of the limiting sleeve 24 and the outer wall of the male head 1, the limiting sleeve 24 itself is locked after the limiting sleeve 24 locks the steel ball 23, thereby preventing the limiting sleeve 24 from retracting due to vibration during driving, thereby avoiding safety hazards such as oil leakage caused by disconnection of the oil pipe.

[0038] It should be added that a first sealing ring 26 is provided at the inner side of the inlet end of the female connector 2 corresponding to the position where the outlet end of the male connector 1 is connected; when the male connector 1 and the female connector 2 are connected, sealing protection can be provided at the connection to prevent oil leakage.

[0039] Furthermore, the inner side of the inlet end of the male head 1 has a threaded groove 11, and the outlet end of the female head 2 has a threaded joint 21; such an arrangement can ensure the flow direction in the oil pipe, prevent the oil from impacting the joint, reduce the difficulty of sealing, and thus help improve the sealing effect.

[0040] Specifically, the male head check assembly 3 includes a check valve core 31, a retaining frame 32, an annular seat 33 and a second spring 34. The check valve core 31 moves along the axial direction of the male head 1 and is located on the inner side of the male head 1. The retaining frame 32 moves along the axial direction of the male head 1, is located on the inner side of the male head 1 and is clamped at the end of the check valve core 31 away from the outlet end of the male head 1. The annular seat 33 is clamped on the inner wall of the male head 1 near the inlet end. The second spring 34 is arranged between the retaining frame 32 and the annular seat 33 and the two ends are respectively connected to the retaining frame 32 and the annular seat 33. The edge of one end of the check valve core 31 close to the outlet end of the male head 1 abuts against the inner wall of the outlet end of the male head 1 and protrudes from the outlet end of the male head 1 at the central position, wherein a second sealing ring 311 in contact with the inner wall of the male head 1 is embedded on the outer wall of the check valve core 31.

[0041] It can be understood that the female check assembly 4 and the male check assembly 3 are arranged in opposition and have the same configuration; the check valve cores 31 in the male check assembly 3 and the female check assembly 4 are relative to each other and can abut against each other when in contact, thereby pushing each other to unseal and allow the male head 1 and the female head 2 to be connected. When the connector is disassembled, the male head 1 and the female head 2 are gradually separated and pushed by the second springs 34 connected to each other to automatically seal the male head 1 and the female head 2 to prevent oil leakage, reduce the difficulty of disassembly during maintenance, save additional sealing operations, and simplify the disassembly steps. Example 2

[0042] Reference Figure 1The difference between this embodiment and embodiment 1 is that the outer wall of the inlet end of the male connector 1 has six first angle surfaces 13 distributed in a circular array, and the outer wall of the outlet end of the female connector 2 has six second angle surfaces 27 distributed in a circular array; since six angle surfaces are provided on the outer walls of both the male connector 1 and the female connector 2 to form a hexagonal nut shape, it is convenient to apply force during operation, and even with the help of tools, the problem of the connector being locked due to aging can be solved.

[0043] Secondly, the outer wall of the limiting sleeve 24 is provided with friction lines 242 ; since the friction lines 242 are provided on the outer wall of the limiting sleeve 24 , the friction force is increased, and the hand slipping and laborious operation can be avoided, and the operation is more labor-saving.

[0044] For other structures not described, refer to Example 1.

[0045] Working principle: In the utility model, when the male head 1 and the female head 2 are connected, the limiting sleeve 24 is dragged toward the outlet end of the female head 2 to keep the steel ball 23 in a loose and movable state. At this time, the male head 1 is inserted into the female head 2 and pressed tightly, and then the limiting sleeve 24 is loosened, so that the limiting sleeve 24 is reset under the action of the first spring 25, and the steel ball 23 is pressed into the annular groove 14 to form a locked state, thereby connecting the male head 1 and the female head 2, and maintaining the seal under the action of the first sealing ring 26. In order to further lock the limiting sleeve The sleeve 24 is prevented from being loosened. The limiting sleeve 24 needs to be rotated at this time so that the clamping head 241 misses the protrusion 121 in the L-shaped lock groove 12 and enters its lock port. Under the action of the protrusion 121, the clamping head 241 on the limiting sleeve 24 in vibration is prevented from escaping from the lock port. Thus, the limiting sleeve 24 is locked under the action of at least three supporting points to prevent it from retracting, thereby improving safety. At the same time, the male check assembly 3 and the female check assembly 4 inside the connected male head 1 and the female head 2, the two opposite check valves The cores 31 abut against each other and thus detach from the inner walls of the male head 1 and the female head 2 respectively, thus achieving unsealing. At this time, the oil pipe and the joint are unblocked. When disassembling, the limiting sleeve 24 is pulled back, and then the limiting sleeve 24 is rotated. By applying force, the clamping head 241 is freed from the limit of the protrusion 121 in the lock mouth and smoothly disengaged from the L-shaped lock groove 12. As the limiting sleeve 24 retreats, the tightly pressed steel ball 23 is unlocked, so that when the male head 1 is pulled, the steel ball 23 will disengage from the annular groove 14, thus achieving disassembly, and as the male head 1 is removed from the female head When the check valve cores 31 on the head 2 are pulled out, the two check valve cores 31 abutting against each other are reset under the action of their respective second springs 34, thereby closing the oil circuit again to avoid oil leakage during disassembly; when the oil pipe and the male head 1 and the female head 2 are disassembled, the male head 1 and the female head 2 can be grasped by the first angle surface 13 and the second angle surface 27, and the connectors can be removed from the oil pipe respectively. When the locking situation cannot be released by human power, the first angle surface 13 and the second angle surface 27 can be used with the help of tools to apply force to complete the entire disassembly.

[0046] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A quick connector for a fuel pipe of an automobile, comprising a male connector (1) and a female connector (2), characterized in that: A male head check assembly (3) is arranged in the outlet end of the male head (1), and a female head check assembly (4) is arranged in the inlet end of the female head (2); the female head check assembly (4) and the male head check assembly (3) are arranged opposite to each other, and are mutually unlocked with the male head check assembly (3) when the male head (1) and the female head (2) are connected; A plurality of movable grooves (22) are arranged in a ring array on the outer wall of the inlet end of the female head (2) and are communicated with the inside of the female head (2). Each of the movable grooves (22) has a steel ball (23). The diameter of one end of the movable groove (22) close to the inside of the female head (2) is slightly smaller than the diameter of the steel ball (23). The diameter of the steel ball (23) is larger than the wall thickness of the inlet end of the female head (2). A limiting sleeve (24) for squeezing the steel ball (23) to move toward the inside of the female head (2) is sleeved on the outside of the inlet end of the female head (2). A first spring (25) is sleeved on the outside of the female head (2) with two ends respectively connected to the outer wall of the female head (2) and the inner wall of the limiting sleeve (24). An annular groove (14) for cooperating with the steel ball (23) to lock the male head (1) and the female head (2) is provided at a position on the outer wall of the male head (1) corresponding to the steel ball (23); at least three clamping heads (241) distributed in an annular array are fixedly connected to the inner side of the limiting sleeve (24) away from the end of the first spring (25); an L-shaped locking groove (12) is provided at a position on the outer wall of the male head (1) corresponding to the clamping heads (241); and a protrusion (121) for limiting the clamping heads (241) from slipping off is provided at a position on the inner side of the L-shaped locking groove (12) corresponding to the locking opening.

2. The automobile fuel pipe quick connector according to claim 1, characterized in that: A first sealing ring (26) is provided at a position on the inner side of the inlet end of the female connector (2) corresponding to the position where the female connector (2) is butted against the outlet end of the male connector (1).

3. The automobile fuel pipe quick connector according to claim 2, characterized in that: The inner side of the inlet end of the male head (1) is provided with a thread groove (11), and the outlet end of the female head (2) is provided with a threaded joint (21).

4. The automobile fuel pipe quick connector according to claim 3, characterized in that: The male head check assembly (3) comprises a check valve core (31), a retainer (32), an annular clamping seat (33) and a second spring (34); the check valve core (31) moves along the axial direction of the male head (1) and is located inside the male head (1); the retainer (32) moves along the axial direction of the male head (1), is located inside the male head (1) and is clamped to an end of the check valve core (31) away from the outlet end of the male head (1); the annular clamping seat (33) is clamped to a position close to the inlet end on the inner wall of the male head (1); the second spring (34) is arranged between the retainer (32) and the annular clamping seat (33) and has two ends connected to the retainer (32) and the annular clamping seat (33) respectively; an edge of one end of the check valve core (31) close to the outlet end of the male head (1) abuts against the inner wall of the outlet end of the male head (1) and protrudes from the outlet end of the male head (1) at a central position.

5. The automobile fuel pipe quick connector according to claim 4, characterized in that: A second sealing ring (311) is embedded on the outer wall of the check valve core (31) and contacts the inner wall of the male head (1).

6. The automobile fuel pipe quick connector according to claim 5, characterized in that: The female head non-return assembly (4) and the male head non-return assembly (3) are arranged in alignment and have the same configuration.

7. The automobile fuel pipe quick connector according to claim 6, characterized in that: The outer wall of the inlet end of the male plug (1) has six first angle surfaces (13) distributed in a ring array.

8. The automobile fuel pipe quick connector according to claim 7, characterized in that: The outer wall of the outlet end of the female head (2) has six second angle surfaces (27) distributed in a ring array.

9. The automobile fuel pipe quick connector according to claim 8, characterized in that: The outer wall of the limiting sleeve (24) is provided with friction patterns (242).

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