A quick connect device

Abstract

The utility model discloses a quick connecting device, including part one and part two, part one is inserted in part two, part two includes main part and the connector that rotates and is connected in main part lower extreme, the outer circle surface of part one with the inner circle surface sealed cooperation of main part, and the connector is locked connection through at least one fastener with part one, the outer circle surface of part one is equipped with the annular groove that the section is big inside small outside shape, the annular groove is embedded with the sealing ring for with the inner circle surface sealed cooperation of main part constitutes, the section shape of sealing ring and the section shape of annular groove are quite, the utility model discloses sealing ring installation stable and reliable, will not turn around section center and damage, has guaranteed the good sealing between part one and part two, simultaneously, the stepped structure and the split type structure design of part one, benefit production assembly, have reduced production cost.

Description

Technical Field

[0001] This utility model relates to the field of connection device technology, and in particular to a quick connection device for steel ball connection. Background Technology

[0002] Currently, flange connections are often used for quick connection and sealing of two parts. However, flange connections have the following drawbacks: First, the installation is very difficult, requires a large installation space, is slow, and has low production efficiency. Second, flange connections require tightening a large number of bolts and nuts, resulting in high labor intensity.

[0003] To address the aforementioned issues, utility model patent application CN201621124764.2 discloses a quick-connect device for steel balls, comprising a first part and a second part. The second part is inserted into the first part, and the outer circular surface of the first part is sealed to the inner circular surface of the second part. A step is provided on the lower outer circular surface of the first part. The second part includes a body, a concave screw, a locking screw, a connector, and several steel balls. The connector is connected to the lower end of the body. The inner circular surface of the body and the connector has an annular groove with a hemispherical cross-section. An annular groove with a hemispherical cross-section is provided on the outer circular surface of the connector at a position corresponding to the annular groove. A threaded hole is provided on the outer circular surface of the body at a position corresponding to the annular groove. Several steel balls are injected into the circular groove formed by the annular groove and the annular groove through the threaded hole. A concave screw is used to seal the threaded hole. The body and the connector are connected by the steel balls rotating around an axis. The lower part of the connector is integrated with the step of the first part by the locking screw.

[0004] Users have discovered the following problems with the above solution during long-term use: (1) Since the sealing ring is an O-ring, when part one and part two are installed together, the sealing ring will rotate around the center of the cross section and be damaged, resulting in poor sealing or even failure.

[0005] (2) If the step on part one is integrated with part one, and the size or positional accuracy of the positioning hole that mates with the locking screw on the step is poor, the inner end of the locking screw will not be able to be smoothly inserted into the positioning hole when part one and part two are installed together, and the entire part one needs to be replaced, which is costly.

[0006] Therefore, it is necessary to make improvements to address the aforementioned issues. Utility Model Content

[0007] The purpose of this utility model is to provide a quick connection device. The sealing ring of this utility model is installed stably and reliably and will not be damaged by flipping around the center of the cross section, thus ensuring good sealing between part one and part two. At the same time, the stepped structure and the separate structure design of part one facilitate production and assembly and reduce production costs.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a quick connection device, comprising a first part and a second part, wherein the first part is inserted into the second part, and the second part includes a main body and a connector rotatably connected to the lower end of the main body. The outer circular surface of the first part is sealed to the inner circular surface of the main body, and the connector is locked to the first part by at least one fastener. The outer circular surface of the first part is provided with an annular groove with a cross-section that is larger on the inside and smaller on the outside. A sealing ring is embedded in the annular groove for forming a sealing fit with the inner circular surface of the main body, and the cross-sectional shape of the sealing ring is equivalent to the cross-sectional shape of the annular groove.

[0009] By adopting the above technical solution, a sealing ring with a cross-section that is larger on the inside and smaller on the outside is used, and an annular groove that matches the shape of the sealing ring is set on the outer circular surface of part one to fix the sealing ring. This achieves a seal between part one and the main body. Due to the non-circular cross-section design of the sealing ring and the annular groove, the sealing ring will not be damaged by rotating around the center of the cross-section when part one and part two are installed. The installation is more stable and reliable, ensuring good sealing between part one and part two.

[0010] The present invention is further configured such that the cross-sections of the sealing ring and the annular groove are both isosceles trapezoidal.

[0011] By adopting the above technical solution, which is the specific structure of the sealing ring and the annular groove, the limiting structure is subjected to uniform force, thus achieving the effect of preventing overturning.

[0012] The present invention is further configured such that an annular groove is provided at the part where the outer circular surface of the upper end of the part mates with the inner circular surface of the main body, and a copper sleeve is welded on the annular groove. The outer diameter of the copper sleeve is equivalent to the outer diameter of the part 1, and the annular groove is provided on the outer circular surface of the copper sleeve.

[0013] By adopting the above technical solutions, the copper sleeve can reduce friction and extend its service life. At the same time, it can be processed according to the specifications and shape of the sealing ring in the early stage, which can reduce waste and lower production costs.

[0014] The present invention is further configured such that at least one connecting protrusion is detachably provided on the outer circular surface of the first part, the connecting protrusion is provided with a positioning hole, and the inner circular surface of the connector is provided with an equal number of L-shaped grooves as the connecting blocks. The L-shaped groove includes an arc-shaped slot provided along the circumference of the connector and an inlet and outlet for the corresponding connecting protrusion to enter and exit the arc-shaped slot. When the connecting protrusion is screwed into the inner end of the arc-shaped slot, the fastener is locked in place with the positioning hole.

[0015] By adopting the above technical solution, the connecting protrusion on part one is inserted into the L-shaped groove on the connector head and then locked by fasteners, which facilitates quick positioning of the locking position, makes the connection operation more convenient, and reduces labor intensity. At the same time, the separate structure design of the connecting protrusion (step structure) and part one facilitates production assembly and reduces production costs.

[0016] The present invention is further configured such that the outer circular surface of the first part is provided with a number of mounting grooves corresponding to the number of connecting protrusions, and the connecting protrusions are partially interference-fitted into the mounting grooves.

[0017] By adopting the above technical solution, the connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0018] The present invention is further configured such that a limiting groove extends downward from the inner end of the arc-shaped card slot.

[0019] By adopting the above technical solution, the connecting protrusion can be further positioned, which not only facilitates the locking of fasteners, but also makes the subsequent connection structure more robust.

[0020] The present invention is further configured such that the fastener includes a locking screw, the inner end of the locking screw is provided with a positioning protrusion, and the side of the connector is provided with a threaded hole for the locking screw to be screwed into at the position corresponding to the annular groove, and the positioning protrusion is inserted into the positioning hole.

[0021] By adopting the above technical solution, which is the first type of fastener structure, tightening the locking screw can achieve a locking connection between the connector and part one, making the operation very convenient.

[0022] The present invention is further configured such that the fastener includes a pull rod, a preload spring, and a positioning head. A guide hole is provided through the side of the connector corresponding to the position of the annular groove. The pull rod is provided through the guide hole. The positioning head is threaded to the inner end of the pull rod, and the end of the positioning head away from the pull rod is inserted into the positioning hole. A spring groove is provided at the inner end of the guide hole. A limiting flange is provided on the outer periphery of the positioning head. The outer circular surface of the limiting flange is in contact with the inner circular surface of the spring groove. The preload spring is disposed in the spring groove, and both ends of the preload spring abut against the inner end of the spring groove and the limiting flange, respectively.

[0023] By adopting the above technical solution, a second type of fastener structure is achieved. When the pull rod is pulled out, the preload spring is compressed and stores energy. At this time, the positioning head separates from the positioning hole, and part one can be separated from the connector. When connecting part one and the connector are aligned, the pull rod is released, and the preload spring releases energy, which acts on the positioning head, causing it to insert into the positioning hole, thereby locking part one and the connector. The operation is very convenient and does not require the use of other tools.

[0024] The present invention is further configured such that the outer circular surface of the connector is provided with a first guide groove with a semi-circular cross-section, and the inner circular surface of the main body is provided with a second guide groove with a semi-circular cross-section. The first guide groove and the second guide groove are combined to form an annular cavity with a circular cross-section. Multiple steel balls are rolled in the annular cavity. The main body is also provided with at least one through hole for the steel balls to roll into the annular cavity. A concave screw is threaded to the outer end of the through hole.

[0025] By adopting the above technical solution, the connection between the body and the connector can be realized, and it can rotate smoothly around the axis at will. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a structural schematic diagram of part one in Example 1; Figure 3 This is a schematic diagram of the sealing ring structure in Example 1; Figure 4 This is a schematic diagram of the connector structure in Example 1; Figure 5 This is a schematic diagram of the overall structure of Example 2; Figure 6 for Figure 5 A magnified structural diagram of part A in the middle.

[0027] In the diagram: 1. Part 1; 2. Part 2; 3. Main body; 4. Connector; 5. Fastener; 6. Annular groove; 7. Sealing ring; 8. Annular groove; 9. Copper sleeve; 10. Connecting protrusion; 11. Positioning hole; 12. L-shaped groove; 13. Arc-shaped slot; 14. Inlet / outlet; 16. Mounting groove; 17. Limiting groove; 18. Locking screw; 19. Positioning protrusion; 20. Screw hole; 21. Pull rod; 22. Preload spring; 23. Positioning head; 24. Guide hole; 25. Spring groove; 26. Limiting flange; 27. First guide groove; 28. Second guide groove; 29. ​​Annular chamber; 30. Steel ball; 31. Through hole; 32. Concave head screw. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: As shown in the attached document Figures 1-4 The quick-connect device shown includes a component 1 and a component 2. Component 1 is inserted into component 2. Component 2 includes a main body 3 and a connector 4 rotatably connected to the lower end of the main body 3. The outer circular surface of component 1 is sealed to the inner circular surface of the main body 3, and the connector 4 is locked to component 1 by at least one fastener 5. The outer circular surface of component 1 is provided with an annular groove 6 with a cross-section that is larger on the inside and smaller on the outside. A sealing ring 7 is embedded in the annular groove 6 to form a sealing fit with the inner circular surface of the main body 3. The cross-sectional shape of the sealing ring 7 is similar to that of the annular groove 6. A sealing ring 7 with a cross-section that is larger on the inside and smaller on the outside, and an annular groove 6 that matches the shape of the sealing ring 7 are used to fix the sealing ring 7 on the outer circular surface of part 1. This achieves a seal between part 1 and the main body 3. Due to the non-circular cross-section design of the sealing ring 7 and the annular groove 6, the sealing ring 7 will not be damaged by rotating around the center of the cross-section when part 1 and part 2 are installed. The installation is more stable and reliable, ensuring good sealing between part 1 and part 2.

[0030] As attached Figure 2 and attached Figure 3 As shown, both the sealing ring 7 and the annular groove 6 have isosceles trapezoidal cross-sections. This is the specific structure of the sealing ring 7 and the annular groove 6; the limiting structure distributes force evenly, thus preventing overturning.

[0031] As attached Figure 1 As shown, an annular groove 8 is provided at the part where the outer circular surface of the upper end of the part 1 mates with the inner circular surface of the main body 3. A copper sleeve 9 is welded onto the annular groove 8. The outer diameter of the copper sleeve 9 is approximately the same as the outer diameter of the part 1, that is, the shape of the annular groove 8 is approximately the same as the shape of the copper sleeve 9. The annular groove 6 is provided on the outer circular surface of the copper sleeve 9. The copper sleeve 9 can reduce friction and improve service life. At the same time, it can be processed according to the specifications and shape of the sealing ring 7 in the early stage, which can reduce waste and reduce production costs.

[0032] As attached Figures 1-4As shown, at least one connecting protrusion 10 is detachably provided on the outer circular surface of part 1. The connecting protrusion 10 is provided with a positioning hole 11. The inner circular surface of the connector 4 is provided with an equal number of L-shaped grooves 12 as the connecting protrusions. The L-shaped grooves 12 include arc-shaped slots 13 arranged circumferentially along the connector 4 and inlet / outlet 14 for the corresponding connecting protrusions 10 to enter and exit the arc-shaped slots 13. When the connecting protrusions 10 are screwed into the inner end of the arc-shaped slots 13, the fasteners 5 are locked in place with the positioning holes 11. By inserting the connecting protrusions 10 on part 1 into the L-shaped grooves 12 on the connector 4 and then locking them with the fasteners 5, the locking position can be quickly positioned, making the connection operation more convenient and reducing labor intensity. At the same time, the separate structure design of the connecting protrusions 10 (step structure) and part 1 facilitates production assembly and reduces production costs.

[0033] As attached Figure 2 As shown, the outer circumference of the part 1 has a number of mounting grooves 16 corresponding to the number of connecting protrusions 10, and the connecting protrusions 10 are partially interference-fitted into the mounting grooves 16. Its connection structure is simple and reliable, and disassembly and assembly are very convenient.

[0034] As attached Figure 4 As shown, the inner end of the arc-shaped slot 13 extends downward into a limiting groove 17, the width of which is approximately equal to the width of the connecting protrusion 10. The limiting groove 17 further positions the connecting protrusion 10, facilitating the tightening of the fastener 5 and resulting in a more robust connection structure later on.

[0035] As attached Figure 1 As shown, the fastener 5 includes a locking screw 18, the inner end of which has a positioning protrusion 19. The side of the connector 4, corresponding to the position of the annular groove 8, has a threaded hole 20 for the locking screw 18 to be screwed into. The positioning protrusion 19 engages with the positioning hole 11. This is the first structure of the fastener 5. Tightening the locking screw 18 achieves a locking connection between the connector 4 and part 1, making the operation very convenient.

[0036] As attached Figure 1 As shown, the outer circular surface of the connector 4 is provided with a first guide groove 27 with a semi-circular cross-section, and the inner circular surface of the main body 3 is provided with a second guide groove 28 with a semi-circular cross-section. The first guide groove 27 and the second guide groove 28 combine to form an annular chamber 29 with a circular cross-section. The width of the annular chamber 29 is approximately equal to the diameter of the steel ball 30. Multiple steel balls 30 are rolled inside the annular chamber 29. The main body 3 is also provided with at least one through hole 31 for the steel ball 30 to roll into the annular chamber 29. A concave screw 32 is threaded to the outer end of the through hole 31, that is, the outer end of the through hole 31 has an internal thread. This design can realize the connection between the main body and the connector 4, and can rotate smoothly around the axis at will.

[0037] Example 2: As shown in the attached document Figure 5 and attached Figure 6 As shown, in this embodiment, the structure of the fastener 5 is different from that in embodiment 1. The fastener 5 in this embodiment includes a pull rod 21, a pre-tightening spring 22, and a positioning head 23. A guide hole 24 is provided through the side of the connector 4 corresponding to the position of the annular groove 8. The pull rod 21 is partially disposed in the guide hole 24. The positioning head 23 is threaded to the inner end of the pull rod 21, that is, the inner end of the pull rod 21 has a threaded groove, and the outer end of the positioning head 23 has an external thread that mates with the threaded groove. The end of the positioning head 23 away from the pull rod 21 is inserted into the positioning hole 11. A spring groove 25 is provided in the inner end of the guide hole 24. A limiting flange 26 is provided on the outer periphery of the positioning head 23. The outer circular surface of the limiting flange 26 is in contact with the inner circular surface of the spring groove 25. The pre-tightening spring 22 is disposed in the spring groove 25, and the two ends of the pre-tightening spring 22 abut against the inner end of the spring groove 25 and the limiting flange 26, respectively. This is the second structure of fastener 5. When the pull rod 21 is pulled out, the pre-tension spring 22 is compressed and stores energy. At this time, the positioning head 23 separates from the positioning hole 11. At this time, part 1 can be separated from connector 4. When connector 1 and connector 4 are properly aligned, the pull rod 21 is released. At this time, the pre-tension spring 22 releases energy and acts on the positioning head 23, causing it to be inserted into the positioning hole 11, thereby locking part 1 and connector 4. The operation is very convenient and does not require the use of other tools.

Claims

1. A quick-connect device, comprising a first part (1) and a second part (2), wherein the first part (1) is inserted into the second part (2), the second part (2) comprising a main body (3) and a connector (4) rotatably connected to the lower end of the main body (3), the outer circular surface of the first part (1) is sealed to the inner circular surface of the main body (3), and the connector (4) is locked to the first part (1) by at least one fastener (5); characterized in that: The outer circular surface of the part (1) is provided with an annular groove (6) with a cross-section that is larger on the inside and smaller on the outside. A sealing ring (7) is embedded in the annular groove (6) to form a sealing fit with the inner circular surface of the main body (3). The cross-sectional shape of the sealing ring (7) is similar to that of the annular groove (6).

2. A quick connect device according to claim 1, characterised in that: Both the sealing ring (7) and the annular groove (6) have isosceles trapezoidal cross sections.

3. A quick connect device according to claim 1, wherein: The outer circular surface of the upper end of the part (1) is provided with an annular groove (8) where it mates with the inner circular surface of the main body (3). A copper sleeve (9) is welded onto the annular groove (8). The outer diameter of the copper sleeve (9) is equivalent to the outer diameter of the part (1). The annular groove (6) is provided on the outer circular surface of the copper sleeve (9).

4. A quick connect device according to claim 1, wherein: At least one connecting protrusion (10) is detachably provided on the outer circular surface of the part (1). The connecting protrusion (10) is provided with a positioning hole (11). The inner circular surface of the connector (4) is provided with an L-shaped groove (12) in a number equivalent to the connecting block. The L-shaped groove (12) includes an arc-shaped slot (13) arranged circumferentially along the connector (4) and an inlet (14) for the corresponding connecting protrusion (10) to enter and exit the arc-shaped slot (13). When the connecting protrusion (10) is screwed into the inner end of the arc-shaped slot (13), the fastener (5) locks into the positioning hole (11).

5. A quick connect device according to claim 4, characterised in that: The outer circular surface of the part (1) has a number of mounting grooves (16) equal to the number of connecting protrusions (10), and the connecting protrusions (10) are partially interference-fitted into the mounting grooves (16).

6. A quick connect device according to claim 4, wherein: The inner end of the arc-shaped slot (13) extends downward into a limiting groove (17).

7. A quick connect device according to claim 4, wherein: The fastener (5) includes a locking screw (18), the inner end of which is provided with a positioning protrusion (19). The side of the connector (4) is provided with a screw hole (20) through which the locking screw (18) is screwed in, corresponding to the position of the annular groove (8). The positioning protrusion (19) is inserted into the positioning hole (11).

8. A quick connection device according to claim 4, characterized in that: The fastener (5) includes a pull rod (21), a preload spring (22), and a positioning head (23). A guide hole (24) is provided through the side of the connector (4) corresponding to the position of the annular groove (8). The pull rod (21) is partially disposed in the guide hole (24). The positioning head (23) is threaded to the inner end of the pull rod (21), and the end of the positioning head (23) away from the pull rod (21) is inserted into the positioning hole (11). A spring groove (25) is provided at the inner end of the guide hole (24). A limiting flange (26) is provided on the outer periphery of the positioning head (23). The outer circular surface of the limiting flange (26) is in contact with the inner circular surface of the spring groove (25). The preload spring (22) is disposed in the spring groove (25), and the two ends of the preload spring (22) are respectively abutted against the inner end of the spring groove (25) and the limiting flange (26).

9. A quick connect device according to claim 1, wherein: The outer circular surface of the connector (4) is provided with a first guide groove (27) with a semi-circular cross-section, and the inner circular surface of the main body (3) is provided with a second guide groove (28) with a semi-circular cross-section. The first guide groove (27) and the second guide groove (28) are combined to form an annular cavity (29) with a circular cross-section. Multiple steel balls (30) are rolled inside the annular cavity (29). The main body (3) is also provided with at least one through hole (31) for the steel balls (30) to roll into the annular cavity (29). A concave screw (32) is threaded to the outer end of the through hole (31).

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