Guide needle recycling mechanism

Abstract

The utility model discloses a guide needle recycling mechanism, which is characterized in that a first guide groove structure is vertically arranged at the top end of a boss mounting part of a guide needle sleeve, and a first ball is arranged in the first guide groove structure; meanwhile, the outer side of the boss mounting part is sleeved with a ball head plunger sleeve, and an assembly hole structure is formed in the top end of the ball head plunger sleeve; the ball plunger and the ball plunger sleeve are fixedly connected through the assembly hole structure, the second guide groove structure and the first guide groove structure are oppositely arranged, and the second ball abuts against the top end of the first ball; when the guide needle is driven to reciprocate in the guide needle sleeve, the top end face of the guide needle drives the first ball body to vertically move along the first guide groove structure, the first ball body vertically moves to drive the second ball body to vertically move along the second guide groove structure, and then the stress direction in the ball plunger is changed, so that the ball plunger is only stressed in the vertical direction; the impact force of the ball structure in the horizontal direction is avoided, damage to the ball plunger is reduced, and the service life of the ball plunger is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning fin pipe-threading guide, in particular to a guide needle recovery circulation mechanism. Background Art

[0002] During the process of threading the air conditioner fin, the copper tube needs to pass through one end of the fin through a guide needle, thereby realizing the guiding process of the copper tube threading, and when passing through the other end of the fin, it is put back into the ball head plunger that locks and stores the guide needle.

[0003] like Figure 3 to Figure 4 As shown, the current conventional guide needle use or recovery device realizes the limit locking of the guide needle by opening a ball plunger installation hole at the top of the guide needle sleeve and setting a steel ball in the guide groove at the bottom of the ball plunger. However, during use, due to the up and down stroke movement of the ball head under the influence of the pre-pressure of the guide needle, the ball head will repeatedly wear the inside of the plunger body in the horizontal direction, especially the port of the ball plunger. Over time, cracks will occur at the port or the ball head will fall off, resulting in the scrapping of the ball plunger workpiece. Utility Model Content

[0004] The utility model provides a guide needle recovery circulation mechanism to overcome the above technical problems.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A guide needle recovery and circulation mechanism comprises a ball plunger, a guide needle, and a guide needle sleeve with a boss mounting portion provided circumferentially and used for the guide needle to reciprocate, a first guide groove structure is vertically provided at the top end of the boss mounting portion of the guide needle sleeve, and a first ball is provided in the first guide groove structure;

[0007] A ball plunger sleeve is sleeved on the outer side of the boss mounting portion and fixedly connected to form an integrated structure, and an assembly hole structure is provided at the top end of the ball plunger sleeve;

[0008] The ball plunger is fixedly connected to the ball plunger sleeve via an assembly hole structure, and a second guide groove structure for guiding the second ball is provided at the bottom end of the ball plunger;

[0009] The second guide groove structure is arranged opposite to the first guide groove structure, and the second sphere abuts against the top end of the first sphere.

[0010] Furthermore, a first connecting hole structure connected to the inside of the guide needle sleeve is formed at the bottom end of the first guide groove structure; the bottom end of the first sphere passes through the first connecting hole structure and is located inside the guide needle sleeve;

[0011] A second connecting hole structure connected to the first guiding groove structure is formed at the bottom end of the second guiding groove structure, and the bottom end of the second sphere passes through the second connecting hole structure and abuts against the top end of the first sphere.

[0012] Furthermore, a spherical clamping groove is provided in the circumference of the guide needle, and a copper tube sleeve section and a fin tube guide section are respectively provided at two ends of the guide needle.

[0013] Further, the diameter of the first guide groove structure / the second guide groove structure is respectively the same as the diameter of the first sphere / the second sphere;

[0014] The diameter of the first connecting hole structure / the second connecting hole structure is smaller than the diameter of the first sphere / the second sphere, respectively.

[0015] Furthermore, the ball clamping groove is specifically an arc-shaped groove structure;

[0016] The arc-shaped groove structure is matched with the bottom end of the first sphere, and the depth of the arc-shaped groove structure is smaller than the radius of the first sphere.

[0017] Furthermore, the straight lines where the central axes of the first guide groove structure, the second guide groove structure, the first connecting hole structure and the second connecting hole structure are located coincide with each other.

[0018] Beneficial effect: The utility model provides a guide needle recovery circulation mechanism, which vertically opens a first guide groove structure at the top end of the boss mounting portion of the guide needle sleeve, and arranges a first sphere in the first guide groove structure; at the same time, a ball head plunger sleeve is sleeved on the outer side of the boss mounting portion, and an assembly hole structure is opened at the top end of the ball head plunger sleeve; the ball head plunger is fixedly connected to the ball head plunger sleeve through the assembly hole structure, and the second guide groove structure and the first guide groove structure are arranged relative to each other, and the second sphere abuts against the top end of the first sphere; when the guide needle is driven to reciprocate in the guide needle sleeve, the top end surface of the guide needle drives the first sphere to move vertically along the first guide groove structure, and the vertical movement of the first sphere drives the second sphere to move vertically along the second guide groove structure, thereby changing the force direction inside the ball head plunger, so that the ball head plunger is only subjected to the force in the vertical direction, and is not subjected to the impact force in the horizontal direction of the spherical structure, thereby reducing the damage to the ball head plunger and greatly improving the service life of the ball head plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic cross-sectional view of the device structure of a guide needle recovery and circulation mechanism of the utility model;

[0021] Figure 2 This is a structural schematic diagram of a guide needle recovery and circulation mechanism of the utility model;

[0022] Figure 3 It is a schematic diagram of the structural section of an existing guide needle recovery and circulation device;

[0023] Figure 4 It is a structural schematic diagram of an existing guide needle recovery and circulation device.

[0024] In the figure: 1, ball plunger; 11, second guide groove structure; 110, second connecting hole structure; 111, second sphere; 2, ball plunger sleeve; 3, guide needle sleeve; 31, boss mounting portion; 310, first guide groove structure; 311, first sphere; 312, first connecting hole structure; 4, guide needle; 40, copper tube limiting end face; 41, ball clamping groove; 42, copper tube sleeve section; 43, fin tube guide section. DETAILED DESCRIPTION

[0025] 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.

[0026] This embodiment provides a guide needle recovery and circulation mechanism, such as Figure 1 to Figure 2 As shown, it includes a ball plunger 1, a ball plunger sleeve 2 and a guide needle sleeve 3 for the reciprocating movement of the guide needle 4, and the guide needle 4 is provided with a ball clamping groove 41 in the circumference; specifically, the two ends of the guide needle 4 are respectively provided with a copper tube sleeve section 42 and a fin tube insertion guide section 43, the fin tube insertion guide section 43 and the copper tube sleeve section 42 are specifically cone structures, and a copper tube limiting end face 40 is provided between one end of the copper tube sleeve section 42 and the guide needle 4, the fin tube insertion guide section 43 is used to adapt and flexibly connect with one end of the copper tube hole to be penetrated by the fin, and the copper tube sleeve section 42 is used to sleeve one end of the copper tube on the copper tube sleeve section 42 after the fin tube insertion guide section 43 is flexibly connected with one end of the copper tube hole to be penetrated by the fin, and push the other end of the copper tube to realize the tube insertion operation of the air conditioner fin;

[0027] The guide needle sleeve 3 is provided with a boss mounting portion 31 on its periphery, and a first guide groove structure 310 is provided at the top of the boss mounting portion 31, a first sphere 311 is provided in the first guide groove structure 310, and a first connecting hole structure 312 connected to the inside of the guide needle sleeve 3 is provided at the bottom of the first guide groove structure 310, the ball plunger sleeve 2 is fixedly connected to the boss mounting portion 31, and an assembly hole structure 21 is provided at the top of the ball plunger sleeve 2, and the ball plunger 1 is fixedly connected to the ball plunger sleeve 2 through an external thread provided on the periphery and an internal thread provided in the assembly hole structure 21, and is fixed by a hexagonal nut;

[0028] The ball plunger 1 is provided with a second guide groove structure 11, and a second connecting hole structure 110 connected to the first guide groove structure 310 is provided at the bottom end of the second guide groove structure 11, and the bottom end of the second guide groove structure 11 is arranged opposite to the top end of the first guide groove structure 310, and a second sphere 111 is arranged in the second guide groove structure 11; the bottom end of the second sphere 111 abuts against the top end of the first sphere 311 through the second connecting hole structure 110, specifically, the diameter of the first guide groove structure 310 / the second guide groove structure 11 is the same as the diameter of the first sphere 311 / the second sphere 111, and the first sphere 311 / the second sphere 111 is specifically a steel ball with a diameter of 2.5 mm, which ensures that the first sphere 311 / the second sphere 111 can move vertically in the first guide groove structure 310 / the second guide groove structure 11;

[0029] The diameter of the first connecting hole structure 312 / the second connecting hole structure 110 is smaller than the diameter of the first sphere 311 / the second sphere 111. The bottom end of the first sphere 311 passes through the first connecting hole structure 312 and is located inside the guide needle sleeve 3 to prevent the first sphere 311 from detaching from the first guide groove structure 310 when there is no guide needle moving inside the guide needle sleeve 3. The sphere engaging groove 41 is specifically an arc groove structure; and the arc groove structure is adapted to the bottom end of the first sphere 311, and the depth of the arc groove structure is smaller than the radius of the first sphere 311; the first guide groove structure 310, the second guide groove structure 11, and the first connecting hole structure 31 2 and the straight line where the central axis of the second connecting hole structure 110 is located coincident; it ensures that the plane where the horizontal tangent of the bottom end of the first sphere 311 / the second sphere 111 is located is respectively below the top of the first connecting hole structure 312 / the second connecting hole structure 110, so as to ensure that when the guide needle 4 reciprocates in the guide needle sleeve 3, the top surface of the guide needle 4 can contact and drive the first sphere 311 to move vertically along the first guide groove structure 310, and then the vertical movement of the first sphere 311 drives the second sphere 111 to move vertically along the second guide groove structure 11 until the first sphere 311 is engaged with the sphere engaging groove 41, so as to realize the limit locking of the guide needle 4. In this embodiment, by changing the force direction inside the ball plunger, the ball plunger is only subjected to the vertical force and is not subjected to the horizontal impact force due to the spherical structure, which reduces the damage to the ball plunger and greatly improves the service life of the ball plunger.

[0030] The working principle of the present embodiment is as follows: when the guide needle 4 is not used for the air-conditioning fin threading operation, the guide needle 4 is placed in the guide needle sleeve 3, and the bottom end of the first sphere 311 passes through the first connecting hole structure 312 and abuts against the sphere clamping groove 41 to achieve a limit lock on the guide needle 4, thereby preventing the guide needle 4 and the guide needle sleeve 3 from accidentally falling off or separating. When the guide needle 4 is needed to be used for the air-conditioning fin threading operation, the sphere clamping groove 41 drives the first sphere 311 to move vertically along the first guide groove structure 310 by driving one end of the guide needle 4, so that the guide needle 4 is separated from the guide needle sleeve 3, and the fin threading guide section 43 of the guide needle 4 is inserted into one end of the copper tube hole to be threaded through the fin, and then one end of the copper tube is sleeved on the copper tube sleeve section 42 of the guide needle 4, and then the other end of the copper tube is driven to complete the fin threading operation. When the threading is completed, the copper tube drives the fin threading guide section 43 of the guide needle 4 to extend from the other end of the fin. The guide needle sleeve 3 of the pre-placed guide needle recovery circulation mechanism is arranged opposite to the tube-piercing hole at the other end of the fin, and the guide needle 3 is slid in the guide needle sleeve 3. When the top surface of the guide needle 3 contacts the first sphere 311, the guide needle 3 continues to be moved to drive the first sphere 311 to move vertically along the first guide groove structure 310. As the first sphere 311 moves, the second sphere 111 abutting against it is driven to move vertically along the second guide groove structure 11 until the sphere engaging groove 41 is located at the bottom end of the first connecting hole structure 312. The first sphere 311 falls and its bottom end is engaged with the sphere engaging groove 41. At this time, the second sphere 111 moves vertically downward along the second guide groove structure 11 and abuts against the top end of the first sphere 311 again. Finally, the copper tube of the fin after the tube-piercing is completed is separated from the fin tube-piercing guide section 43 of the guide needle 4 to achieve the limit locking of the guide needle 4, thereby completing the recovery of the guide needle.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A guide needle recovery circulation mechanism, comprising a ball plunger (1), a guide needle (4), and a guide needle sleeve (3) provided with a boss mounting portion (31) in the circumferential direction and used for the guide needle (4) to reciprocate, characterized in that: A first guide groove structure (310) is vertically provided at the top end of the boss mounting portion (31) of the guide needle sleeve (3), and a first sphere (311) is provided in the first guide groove structure (310); A ball plunger sleeve (2) is sleeved on the outer side of the boss mounting portion (31) and fixedly connected to form an integrated structure, and an assembly hole structure (21) is provided at the top end of the ball plunger sleeve (2); The ball plunger (1) is fixedly connected to the ball plunger sleeve (2) via an assembly hole structure (21), and a second guide groove structure (11) for guiding the second ball (111) is provided at the bottom end of the ball plunger (1); The second guide groove structure (11) is arranged opposite to the first guide groove structure (310), and the second sphere (111) abuts against the top end of the first sphere (311).

2. A guide needle recovery and circulation mechanism according to claim 1, characterized in that: A first connecting hole structure (312) connected to the interior of the guide needle sleeve (3) is formed at the bottom end of the first guide groove structure (310); the bottom end of the first sphere (311) passes through the first connecting hole structure (312) and is located inside the guide needle sleeve (3); A second connecting hole structure (110) connected to the first guiding groove structure (310) is provided at the bottom end of the second guiding groove structure (11), and the bottom end of the second sphere (111) passes through the second connecting hole structure (110) and abuts against the top end of the first sphere (311).

3. A guide needle recovery and circulation mechanism according to claim 2, characterized in that: A spherical clamping groove (41) is provided in the circumference of the guide needle (4), and a copper tube sleeve section (42) and a fin tube guide section (43) are respectively provided at two ends of the guide needle (4).

4. A guide needle recovery and circulation mechanism according to claim 3, characterized in that: The diameter of the first guide groove structure (310) / the second guide groove structure (11) is respectively the same as the diameter of the first sphere (311) / the second sphere (111); The diameter of the first connecting hole structure (312) / the second connecting hole structure (110) is smaller than the diameter of the first sphere (311) / the second sphere (111), respectively.

5. A guide needle recovery and circulation mechanism according to claim 3, characterized in that: The ball clamping groove (41) is specifically an arc-shaped groove structure; Furthermore, the arc-shaped groove structure is matched with the bottom end of the first sphere (311), and the depth of the arc-shaped groove structure is smaller than the radius of the first sphere (311).

6. A guide needle recovery and circulation mechanism according to claim 4, characterized in that: The straight lines on which the central axes of the first guide groove structure (310), the second guide groove structure (11), the first connecting hole structure (312) and the second connecting hole structure (110) coincide with each other.

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