A quick connector for electrical wires

Abstract

This application relates to the field of wire connector technology and discloses a quick-connect wire connector, including a housing. An internal cavity is formed axially inside the housing, and a positioning post is provided at the bottom of the internal cavity. The positioning post extends axially, and a through hole is provided on the bottom wall of the housing, located on one side of the positioning post. A detachable pressure sleeve assembly is provided inside the internal cavity. The pressure sleeve assembly is slidably fitted around the positioning post and is inserted axially into the internal cavity. A first spring and a second spring are sequentially sleeved on the outside of the pressure sleeve assembly. One end of the first spring abuts against the inner wall of the housing, and the other end abuts against the end of the pressure sleeve assembly. One end of the second spring abuts against the end of the pressure sleeve assembly, and the other end extends outward toward the housing. A main screw sleeve is threaded to the outside of the housing and screws onto the housing axially. The main screw sleeve abuts against the second spring, driving the pressure sleeve assembly to press axially.

Description

Technical Field

[0001] This application belongs to the field of electrical connector technology, specifically relating to a quick-connect connector for electrical wires. Background Technology

[0002] An electrical connector, also known as an electrical wire joint, primarily serves to maintain the continuity of a circuit and ensure the insulation level at the wire joint, enabling its safe and reliable operation. When two locations are far apart and cannot be connected using a single wire, several wires must be connected in series, necessitating the installation of a connector between the wires.

[0003] Traditional connection methods typically involve peeling off the insulation layer of the wires to expose the internal wires, twisting the metal wires together, and then wrapping the outside with insulating tape. This connection method is complex to operate, poses significant safety hazards, and the tape wrapping not only has poor stability and is prone to breaking, but also suffers from poor insulation and is prone to leakage, causing great inconvenience to users. Utility Model Content

[0004] This application provides a quick-connect connector for electrical wires to solve the technical problem of complex operation of the above-mentioned connection methods.

[0005] The technical solution adopted in this application is as follows:

[0006] A quick-connect connector for electrical wires includes a housing with an axially oriented internal cavity. A positioning post is located at the bottom of the internal cavity and extends axially. A through hole is located on one side of the positioning post on the bottom wall of the housing. A detachable compression sleeve assembly is disposed within the internal cavity and is slidably fitted around the positioning post. The compression sleeve assembly is inserted axially into the internal cavity. A first spring and a second spring are sequentially sleeved on the outside of the compression sleeve assembly. One end of the first spring abuts against the inner wall of the housing, and the other end abuts against the end of the compression sleeve assembly. One end of the second spring abuts against the end of the compression sleeve assembly, and the other end extends outward toward the housing. A main screw sleeve is threaded onto the outside of the housing and screws axially onto the housing. The main screw sleeve abuts against the second spring, driving the compression sleeve assembly to press axially.

[0007] Optionally, the top of the main rotating sleeve is provided with a locking part for locking, which forms a locking engagement with the stop part of the housing after the main rotating sleeve is screwed into a preset position.

[0008] Optionally, the locking part is a ratchet, which is sleeved on the circumferential surface of the main rotating sleeve, and the stop part is a pawl that is rotatably connected to the housing, with the pawl cooperating with the ratchet stop.

[0009] Optionally, the inner wall of the housing is provided with an annular groove, and a sealing ring is provided in the groove. The sealing ring fits against the outer circumferential surface of the main sleeve. The sealing ring has a circular cross-section and is located in the annular groove of the inner wall of the housing, forming a closed fit with the outer wall of the main sleeve in the circumferential direction.

[0010] Optionally, the compression sleeve assembly includes a tapered compression sleeve with decreasing outer diameter, and guide holes that slide and engage with positioning pins are equidistantly provided on the outer wall of the tapered compression sleeve.

[0011] Optionally, the tapered pressure sleeve end is provided with symmetrical stripping holes, the inner wall of the stripping holes is provided with an embossed structure, and the stripping holes are coaxial with the through holes on the bottom wall of the housing.

[0012] Optionally, the first spring and the second spring are arranged sequentially along the axial direction of the housing, and a limiting plate is opened in the middle of the housing. One end of the first spring abuts against the limiting plate, and the other end abuts against the end of the pressure sleeve assembly. One end of the second spring passes through the limiting plate and abuts against the end of the main sleeve, and the other end abuts against the end of the pressure sleeve assembly.

[0013] Optionally, two pairs of holes and positioning posts are provided symmetrically about the housing axis.

[0014] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0015] 1. The clamping sleeve assembly adopts a multi-stage conical surface structure. When corresponding to different wire diameters, only the appropriate clamping sleeve needs to be replaced. There is no need to manually strip the insulation layer. The insulation layer can be slightly cut in through the coaxial cooperation of the stripping hole and the through hole to complete the adaptive connection of the electrical contact diameter. At the same time, the external thread of the main sleeve and the thread of the housing are precisely matched. When screwed into the preset position, the second spring immediately transmits force to the clamping sleeve assembly, and the clamping sleeve automatically clamps the wire. A reliable connection can be completed by screwing in with one hand without the need for additional tools or auxiliary devices.

[0016] 2. The crimping assembly uses interchangeable tapered crimping sleeves, covering multiple sizes. The structure is compact yet can adapt to various wire specifications from thin to thick. During on-site construction, only one set of crimping sleeves is needed to meet most wiring needs.

[0017] 3. The first spring abuts against the inner wall of the housing, and the second spring abuts against the main sleeve. The two springs generate a superimposed preload along the axial direction, so that the pressure sleeve assembly is stably compressed in both the axial and radial directions, significantly improving the anti-loosening ability. The locking part and the stop part engage when screwed into position. When screwed in in one direction, the ratchet can enter freely, and when screwed out in the opposite direction, the pawl engages and locks, realizing the reliability of preventing reverse rotation and vibration once locked.

[0018] 4. The sealing ring in the annular groove and the outer circumferential surface of the main sleeve are continuously seamless in the circumferential direction, which can effectively block dust, water vapor and corrosive media, and achieve long-term trouble-free operation in outdoor laying and humid environments. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a three-dimensional schematic diagram of a quick-connect connector for electrical wires according to this application;

[0021] Figure 2 This is a cross-sectional view of a quick-connect connector for electrical wires according to this application;

[0022] Figure 3 This is a schematic diagram of the locking part and the stop part in this application.

[0023] Figure 4 This is a three-dimensional schematic diagram of the components inside the cavity of this application;

[0024] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle.

[0025] 1. Housing; 11. Internal cavity; 12. Through hole; 13. Stop part; 14. Limiting plate; 2. Positioning post; 3. Pressure sleeve assembly; 31. Guide hole; 32. Peeling hole; 4. First spring; 5. Second spring; 6. Main rotating sleeve; 61. Locking part; 7. Sealing ring. Detailed Implementation

[0026] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0028] Example 1:

[0029] A quick-connect connector for electrical wires includes a housing 1. An internal cavity 11 is formed axially inside the housing 1. A positioning post 2 is located at the bottom of the internal cavity 11 and extends axially. A through hole 12 is formed on the bottom wall of the housing 1, located on one side of the positioning post 2. A detachable pressure sleeve assembly 3 is disposed within the internal cavity 11. The pressure sleeve assembly 3 is slidably fitted around the positioning post 2 and inserted axially into the internal cavity 11. A first spring 4 and a second spring 5 are sequentially sleeved on the outside of the pressure sleeve assembly 3. One end of the first spring 4 abuts against the inner wall of the housing 1, and the other end abuts against the end of the pressure sleeve assembly 3. One end of the second spring 5 abuts against the end of the pressure sleeve assembly 3, and the other end extends outward from the housing 1. A main screw sleeve 6 is threaded onto the outside of the housing 1 and screws axially onto the housing 1. The main screw sleeve 6 abuts against the second spring 5, driving the pressure sleeve assembly 3 to press axially.

[0030] Further reference Figure 3 The top of the main rotating sleeve 6 is provided with a locking part 61 for locking. After the main rotating sleeve 6 is screwed into the preset position, the locking part 61 forms a locking engagement with the stop part 13 of the housing 1.

[0031] Furthermore, refer to Figure 3 The locking part 61 is a ratchet, which is sleeved on the circumference of the main rotating sleeve 6. The stop part 13 is a pawl that is rotatably connected to the housing 1, and the pawl cooperates with the ratchet stop.

[0032] Furthermore, refer to Figure 2 The sealing ring 7 has a circular cross-section and is located in the annular groove on the inner wall of the housing 1, forming a closed fit with the outer wall of the main sleeve 6 in the circumferential direction.

[0033] Furthermore, refer to Figure 2 The inner wall of the housing 1 is provided with an annular groove, and a sealing ring 7 is provided in the groove. The sealing ring 7 is in contact with the outer peripheral surface of the main rotating sleeve 6.

[0034] Furthermore, refer to Figure 2 as well as Figure 4 The pressure sleeve assembly 3 includes a tapered pressure sleeve with decreasing outer diameter, and guide holes 31 that slide and cooperate with the positioning post 2 are equidistantly opened on the outer wall of the tapered pressure sleeve.

[0035] Furthermore, refer to Figure 2 as well as Figure 4 The first spring 4 and the second spring 5 are arranged sequentially along the axial direction of the housing 1. A limiting plate 14 is opened in the middle of the housing 1. One end of the first spring 4 abuts against the limiting plate 14, and the other end abuts against the end of the pressure sleeve assembly 3. One end of the second spring 5 passes through the limiting plate 14 and abuts against the end of the main rotating sleeve 6, and the other end abuts against the end of the pressure sleeve assembly 3.

[0036] Furthermore, refer to Figure 2 as well as Figure 4 Two pairs of holes 12 and positioning pins 2 are symmetrically arranged about the axis of the housing 1.

[0037] refer to Figures 1 to 4 When it is necessary to quickly connect the wire to the distribution box terminal, the housing 1 of the quick-connect connector is placed on the terminal guide rail as the installation reference. First, the insulation layer of the wire to be connected is stripped to a suitable length, and it is inserted into the housing 1 through the through hole 12 on the bottom wall. At this time, the operator rotates the main rotating sleeve 6 clockwise. The main rotating sleeve 6 is constrained by the external thread of the housing 1 and moves axially inward into the housing 1. It also compresses the second spring 5 by abutting against it, so that the pressure sleeve assembly 3 is pressed axially towards the bottom of the inner cavity 11. At the same time, the first spring 4 is stretched by the limiting plate 14 and the pressure sleeve assembly 3, ensuring that the preload of the pressure sleeve assembly 3 is constant. At this time, the conical pressure sleeve slides with the positioning post 2 through the equidistant guide hole 31, so that the pressure sleeve assembly 3 as a whole radially compresses the wire along the axial direction, realizing reliable clamping of the copper core conductor. After being pressed to the preset position, the ratchet locking part 61 on the main rotating sleeve 6 engages with the pawl stop part 13 on the housing 1, completing self-locking and preventing the main rotating sleeve 6 from loosening due to vibration or pulling during use. At this time, the sealing ring 7 fits tightly against the outer circumference of the main rotating sleeve 6 and cooperates with the annular groove on the inner wall of the housing 1 to form a closed dustproof and waterproof sealing structure, which can resist the intrusion of moisture and dust in the distribution box and ensure long-term stable connection.

[0038] When unlocking, first remove the sealing ring 7. Use your fingers or a flat pry bar to remove the sealing ring 7 from the annular groove on the inner wall of the housing 1, so that the ratchet at the top of the main rotating sleeve 6 and the pawl on the housing 1 are exposed, ensuring space for subsequent operations.

[0039] Insert your finger or tool into the gap between the top of the main sleeve 6 and the housing 1, and turn the pawl so that it deviates radially inward from the ratchet tooth surface, thereby releasing the pawl from contact with the ratchet tooth surface and eliminating the self-locking constraint.

[0040] After the pawl is released, the main sleeve 6 is driven out in the opposite direction to when it was locked. At this time, the main sleeve 6 will slowly exit the housing 1 along the thread axis. As the main sleeve 6 exits, the second spring 5, which is in contact with it, begins to extend outward with its own elastic force; the first spring 4 is contracted by the limiting plate 14 and also quickly returns to its natural length; under the combined action of the two springs, the pressure sleeve assembly 3 is ejected axially to the initial position, ending the compression and fixation of the wire. Removing the pressure sleeve assembly 3: When the pressure sleeve assembly 3 is pushed to the opening of the housing 1 by the two springs, it can be removed with fingers or pliers for replacement or repair.

[0041] Example 2:

[0042] Furthermore, the tapered pressure sleeve end is symmetrically provided with peeling holes 32, and the inner wall of the peeling hole 32 is provided with an embossed structure. The peeling hole 32 is coaxial with the through hole 12 on the bottom wall of the housing 1.

[0043] Reference Figure 4 as well as Figure 5 Based on Example 1, the tapered pressure sleeve is provided with stripping holes 32 at both ends, and the inner wall of the stripping holes 32 is provided with an embossed structure; the stripping holes 32 and the bottom wall of the housing 1 are arranged coaxially through holes 12, and are used to assist in the removal of the wire insulation layer in conjunction with the positioning post 2.

[0044] The insulated wire is first inserted into the through hole 12 and stripping hole 32 on the bottom wall of the housing 1 from the outside. When the wire touches the embossed structure in the stripping hole 32, the insulation layer is loosened, scratched, and detached under the action of rotation or slight pushing back and forth, automatically completing the stripping process. The stripped copper core naturally slides into the vicinity of the positioning post 2. Similar to Embodiment 1, the main rotating sleeve 6 is rotated clockwise, and the second spring 5 and the first spring 4 are compressed in sequence. The pressure sleeve assembly 3 is pressed downward along the positioning post 2, completing the radial clamping of the copper core. The self-locking and sealing main rotating sleeve 6 continues to be screwed into place, the ratchet and pawl self-lock, and the sealing ring 7 adheres to the inner wall of the housing 1, achieving dual protection of fastening and sealing.

[0045] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0046] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0047] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A quick-connect connector for electrical wires, comprising a housing (1), characterized in that: The housing (1) has an internal cavity (11) axially formed inside. A positioning post (2) is provided at the bottom of the internal cavity (11). The positioning post (2) extends axially. A through hole (12) is provided on the bottom wall of the housing (1). The through hole (12) is located on one side of the positioning post (2). A detachable pressure sleeve assembly (3) is provided inside the internal cavity (11). The pressure sleeve assembly (3) is slidably fitted around the positioning post (2). The pressure sleeve assembly (3) is inserted axially into the internal cavity (11). The outer side of the pressure sleeve assembly (3) is sequentially... A first spring (4) and a second spring (5) are fitted together. One end of the first spring (4) abuts against the inner wall of the housing (1) and the other end abuts against the end of the pressure sleeve assembly (3). One end of the second spring (5) abuts against the end of the pressure sleeve assembly (3) and the other end extends toward the outside of the housing (1). A main screw sleeve (6) is threaded onto the outside of the housing (1). The main screw sleeve (6) is screwed onto the housing (1) along the axial direction. The main screw sleeve (6) abuts against the second spring (5) and drives the pressure sleeve assembly (3) to press along the axial direction.

2. The quick-connect connector for electrical wires according to claim 1, characterized in that: The top of the main sleeve (6) is provided with a locking part (61) for locking. After the main sleeve (6) is screwed into a preset position, the locking part (61) forms a locking engagement with the stop part (13) of the housing (1).

3. The quick-connect connector for electrical wires according to claim 2, characterized in that: The locking part (61) is a ratchet, which is sleeved on the circumference of the main rotating sleeve (6). The stop part (13) is a pawl that is rotatably connected to the housing (1), and the pawl cooperates with the ratchet stop.

4. The quick-connect connector for electrical wires according to claim 1, characterized in that: The inner wall of the housing (1) is provided with an annular groove, and a sealing ring (7) is provided in the groove. The sealing ring (7) is in contact with the outer circumferential surface of the main rotating sleeve (6). The sealing ring (7) has a circular cross section. The sealing ring (7) is located in the annular groove of the inner wall of the housing (1) and forms a closed fit with the outer wall of the main rotating sleeve (6) in the circumferential direction.

5. A quick-connect connector for electrical wires according to claim 1, characterized in that: The pressure sleeve assembly (3) includes a tapered pressure sleeve with decreasing outer diameter, and guide holes (31) that slide and cooperate with the positioning post (2) are provided at equal intervals on the outer wall of the tapered pressure sleeve.

6. A quick-connect connector for electrical wires according to claim 5, characterized in that: The tapered sleeve is symmetrically provided with peeling holes at its end. The inner wall of the peeling hole is provided with an embossed structure. The peeling hole is coaxial with the through hole (12) on the bottom wall of the housing (1).

7. A quick-connect connector for electrical wires according to claim 1, characterized in that: The first spring (4) and the second spring (5) are arranged sequentially along the axial direction of the housing (1). A limiting plate (14) is opened in the middle of the housing (1). One end of the first spring (4) abuts against the limiting plate (14), and the other end abuts against the end of the pressure sleeve assembly (3). One end of the second spring (5) passes through the limiting plate (14) and abuts against the end of the main rotating sleeve (6), and the other end abuts against the end of the pressure sleeve assembly (3).

8. A quick-connect connector for electrical wires according to claim 1, characterized in that: The through hole (12) and the positioning post (2) are arranged symmetrically about the axis of the housing (1) in two pairs.

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