Small bobbin mounting structure of bonding machine

Abstract

The utility model relates to the technical field of bonding machines, in particular to a small bobbin mounting structure of a bonding machine, which comprises a mounting shaft, a limiting ring, a rotating assembly, an elastic piece and a locking assembly, the rotating assembly is rotatably mounted on the mounting shaft, the limiting ring is arranged outside the rotating assembly in a sleeving manner, and the limiting ring is used for relatively fixing the positions of the bobbin and the rotating assembly; the locking assembly is arranged on the mounting shaft, the position of the locking assembly on the mounting shaft is adjustable, one end of the elastic piece abuts against the rotating assembly, and the other end of the elastic piece abuts against the locking assembly. The small bobbin mounting structure of the bonding machine has the characteristics that the pay-off tension is adjustable, and the bobbin is simple and convenient to mount.

Description

Technical Field

[0001] The utility model relates to the technical field of bonding machines, in particular to a small wire shaft installation structure of a bonding machine. Background Art

[0002] The bonding equipment is a key equipment for chip packaging. The bonding equipment is used to complete the bonding of the leads between the substrate and the chip. Therefore, the bonding machine is provided with a mechanism for installing the lead spool. In the prior art, the spool is usually fixedly installed on the rotating rod, and the spool is driven to rotate by the installation shaft. For example, the "universal wire releaser for wire bonding equipment" disclosed in Chinese patent CN106505002A records: the wire tube Ⅰ2 is locked on the spool base 1 through the locking pin 1d on the boss 1c, the spool is sleeved on the ring platform 1b, and the spool lock 3 is sleeved on the wire tube Ⅰ2, so that the bottom surface of the spool lock bottom plate 3a covers the upper end of the ring platform 1b, and the spool sleeved on the ring platform is limited, and then the spool lock 3 is fixed on the wire tube Ⅰ2 through the locking screw 3d. When a manual bonding machine or a semi-automatic bonding machine is bonding, the wire spool is passively released as the lead is pulled, so that the lead has tension. The resistance setting of the wire spool rotation is closely related to the smoothness of the wire release. However, the prior art does not limit the resistance of the wire spool rotation, which makes it easy for the wire to break and become tangled. In addition, the wire spool installation steps in the above patent technology are relatively cumbersome. Utility Model Content

[0003] The utility model aims to provide a small wire shaft installation structure for a bonding machine, which has the characteristics of adjustable wire tension and simple wire shaft installation.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A small wire shaft installation structure of a bonding machine, comprising an installation shaft, a limit ring and a rotating assembly, an elastic member and a locking assembly;

[0006] The rotating assembly is rotatably mounted on the mounting shaft, the limiting ring is sleeved outside the rotating assembly, and the limiting ring is used to relatively fix the position of the lead wire shaft and the rotating assembly;

[0007] The locking assembly is arranged on the installation shaft, and the position of the locking assembly on the installation shaft is adjustable. One end of the elastic member abuts against the rotating assembly, and the other end abuts against the locking assembly.

[0008] In some embodiments, the locking assembly includes a core barrel and an outer barrel, the core barrel is sleeved outside the installation shaft, and the outer barrel is sleeved outside the core barrel;

[0009] The core tube is provided with an axially penetrating opening, an outer wall of one end of the core tube close to the elastic member is provided with an outwardly facing inclined platform, an inner peripheral wall of one end of the outer tube is provided with an inclined surface, and the inclined platform is in contact with the inclined surface.

[0010] In some embodiments, the outer wall of the core barrel and the inner wall of the outer barrel are respectively provided with threads, and the core barrel and the outer barrel are threadedly connected.

[0011] In some embodiments, a nut is connected to one end of the core tube away from the elastic member, and the nut abuts against the end surface of the outer tube.

[0012] In some embodiments, the rotating assembly includes a spool drum and a bearing, wherein the bearing is disposed at both ends of the spool drum, and the bearing is fixedly mounted on the mounting shaft;

[0013] The outer wall of the spool drum is provided with a mounting groove for accommodating the limiting ring, and the elastic member abuts against the outer ring of the bearing or the spool drum.

[0014] In some embodiments, the installation shaft is a cylindrical plug gauge rod, and the bearing is arranged on the installation shaft in an interference fit manner.

[0015] In some embodiments, there are at least two limiting rings, each limiting ring is fixedly installed in the installation groove, and a convex ring protrudes from the outer peripheral surface of the limiting ring.

[0016] In some embodiments, the elastic member is a compression spring or a cylindrical spring sheet, and the elastic member is sleeved outside the installation shaft.

[0017] In some embodiments, a buckle and a rubber pad are provided between the elastic member and the rotating assembly, and the buckle is located between the rubber pad and the rotating assembly.

[0018] The technical solution provided by the utility model may have the following beneficial effects:

[0019] The utility model uses an elastic member to press against the rotating component to provide resistance to the rotation of the rotating component, thereby providing resistance to the rotation of the bobbin, realizing the setting of the wire release tension, and the wire release tension can be kept stable to improve the stability of the welding wire. The wire release tension is adjusted by adjusting the position of the locking component on the installation shaft, so that the small bobbin installation structure is suitable for a variety of leads. Moreover, based on the bobbin being installed on the rotating component in a sleeve manner, the rotating component can adapt to bobbins of various specifications and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a small wire shaft installation structure of a bonding machine according to an embodiment of the utility model;

[0021] Figure 2 It is a cross-sectional view of the small spool mounting structure;

[0022] Figure 3 It is an exploded schematic diagram of the limit ring, the rotating assembly, the elastic member and the locking assembly;

[0023] Among them, there are installation shaft 1, limit ring 2, convex ring 21, rotating component 3, spool drum 31, installation groove 311, bearing 32, elastic member 4, buckle 41, rubber pad 42, locking component 5, core tube 51, opening 511, ramp 512, outer tube 52, and lead spool 01. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Combine the following Figures 1 to 3 , describing a small wire shaft installation structure of a bonding machine according to an embodiment of the utility model.

[0028] A small wire shaft installation structure of a bonding machine in this embodiment includes an installation shaft 1, a limit ring 2 and a rotating assembly 3, an elastic member 4 and a locking assembly 5;

[0029] The rotating assembly 3 is rotatably mounted on the mounting shaft 1, and the limiting ring 2 is sleeved outside the rotating assembly 3. The limiting ring 2 is used to relatively fix the positions of the lead wire shaft 01 and the rotating assembly 3;

[0030] The locking assembly 5 is disposed on the mounting shaft 1 , and the position of the locking assembly 5 on the mounting shaft 1 is adjustable. One end of the elastic member 4 abuts against the rotating assembly 3 , and the other end abuts against the locking assembly 5 .

[0031] In the present invention, the elastic member 4 is pressed against the rotating assembly 3 to provide resistance to the rotation of the rotating assembly 3. Based on the fact that the lead spool 01 is relatively fixed to the rotating assembly 3 through the limiting ring 2, the elastic member 4 provides resistance to the rotation of the lead spool 01, so that the wire between the lead spool 01 and the splitter of the bonding machine has a certain tension, that is, the wire release tension. The wire release tension is provided by the elastic member 4, so that the wire release tension remains stable, thereby improving the stability of the welding wire. The present invention can adjust the rotation resistance of the rotating assembly 3 by adjusting the position of the locking assembly 5 on the mounting shaft 1, thereby achieving the adjustment of the wire release tension, so that the small spool installation structure is suitable for a variety of leads. Moreover, the lead spool 01 is installed on the rotating assembly 3 in a sleeve manner, and there is no mechanism for limiting the lead spool 01 at both ends of the rotating assembly 3, so that the length of the lead spool 01 can be greater than or less than the length of the rotating assembly 3, and the rotating assembly 3 can be suitable for lead spools 01 of various specifications and sizes.

[0032] Specifically, during bonding, the splitter of the bonding machine pulls the lead wire to move between the substrate and the chip, and the lead spool 01 rotates as the lead wire is pulled by the splitter. Based on the pressure of the elastic member 4 on the rotating assembly 3, the lead wire between the lead spool 01 and the splitter is straightened. Based on the stable pressure of the elastic member 4 on the rotating assembly 3, the tension of the wire release is stable. The locking assembly 5 is used to position the elastic member 4. By adjusting the position of the locking assembly 5 on the mounting shaft 1, the compression length of the elastic member 4 can be adjusted, thereby adjusting the pressure of the elastic member 4 on the rotating assembly 3.

[0033] Preferably, the elastic member 4 is a compression spring or a cylindrical spring sheet, and the elastic member 4 is sleeved outside the mounting shaft 1. The compression spring and the cylindrical spring sheet are both compressible elastic members 4. In one embodiment, a buckle 41 and a rubber pad 42 are provided between the elastic member 4 and the rotating assembly 3, and the buckle 41 is located between the rubber pad 42 and the rotating assembly 3. When the lead spool 01 is unwinding, the lead spool 01 carries the rotating assembly 3 to rotate, while the elastic member 4 is in a stationary state, and the buckle 41 and the rubber pad 42 isolate the rotating assembly 3 and the elastic member 4, while maintaining the elastic member 4's pressing effect on the rotating assembly 3, preventing the elastic member 4 from rotating. Exemplarily, the buckle 41 is an E-type buckle.

[0034] In one embodiment of the utility model, the locking assembly 5 includes a core barrel 51 and an outer barrel 52, the core barrel 51 is sleeved outside the installation shaft 1, and the outer barrel 52 is sleeved outside the core barrel 51; the core barrel 51 is provided with an axially penetrating opening 511, and the outer wall of the end of the core barrel 51 close to the elastic member 4 is provided with an outwardly facing inclined platform 512, and the inner peripheral wall of one end of the outer barrel 52 is provided with an inclined surface, and the inclined platform 512 is in contact with the inclined surface. When the inclined surface 521 of the outer barrel abuts against the inclined platform 512 of the core barrel 51, as the contact area between the two increases, the width of the opening 511 of the core barrel 51 gradually decreases, so that the core barrel 51 hugs the installation shaft 1, and the elastic member 4 is locked. The locking assembly 5 has a simple structure and a reliable locking effect. It can be understood that the inclined surface of the outer barrel 52 is located at the end of the outer barrel 52 close to the elastic member 4.

[0035] In one embodiment of the utility model, the outer wall of the core barrel 51 and the inner wall of the outer barrel 52 are respectively provided with threads, and the core barrel 51 and the outer barrel 52 are threadedly connected. The outer barrel 52 and the core barrel 51 are matched in a threaded connection manner, so that the locking operation is simple. In another embodiment of the utility model, a nut is connected to the end of the core barrel 51 away from the compression spring, and the nut is abutted against the end surface of the outer barrel 52. Accordingly, only the thread is provided at the rear end of the core barrel 51 to achieve the match with the nut, so that the core barrel 51 and the outer barrel 52 are easy to process and shape, and the production cost of the locking assembly 5 is reduced.

[0036] In one embodiment of the utility model, the rotating assembly 3 includes a bobbin drum 31 and a bearing 32, wherein the bearing 32 is disposed at both ends of the bobbin drum 31, and the bearing 32 is fixedly mounted on the mounting shaft 1; the outer wall of the bobbin drum 31 is provided with a mounting groove 311 for accommodating the limit ring 2, and the elastic member 4 abuts against the outer ring of the bearing 32 or the bobbin drum 31. The bobbin drum 31 is rotatably mounted on the mounting shaft 1 through the bearing 32, so that the rotation of the lead spool 01 is smoother, and the elastic member 4 abuts against the outer ring of the bearing 32 or the bobbin drum 31 to provide the lead spool 01 with a rotation resistance. Preferably, the elastic member 4 is pressed against the outer ring of the bearing 32 through the buckle 41 and the rubber pad 42.

[0037] In one embodiment of the utility model, the installation shaft 1 is a cylindrical plug gauge rod, and the bearing 32 is arranged on the installation shaft 1 in an interference fit manner. The chip and the substrate are connected by a large number of leads, and the distance between adjacent leads is very small. The wire laying effect of the lead spool 01 is closely related to the stability of the bonding wire. If the wire laying of the lead spool 01 is unstable, causing the wire laying tension to change significantly, the force of the chopper pulling the wire is different, so that the arcs of several leads of the completed wire bonding are inconsistent, and short circuits caused by lead overlap are prone to occur. The installation shaft 1 of this embodiment adopts a cylindrical plug gauge rod, and the precision of the cylindrical plug gauge rod is very high, so that the two bearings 32 of the rotating component 3 have good parallelism, thereby ensuring that the lead spool 01 rotates stably and does not swing when laying out the wire, ensuring the stability of the wire laying, and then improving the bonding precision. In addition, the bearing 32 is arranged on the installation shaft 1 in an interference fit manner, which is easy to assemble.

[0038] In one embodiment of the utility model, there are at least two limiting rings 2, which are fixedly installed in the mounting groove, and a convex ring 21 is protruded from the outer peripheral surface of the limiting ring 2. The lead spool 01 can be directly sleeved on the rotating component 3, and the installation of the lead spool 01 is very simple. When the lead spool 01 is sleeved outside the rotating component 3, the convex ring 21 abuts against the inner wall of the lead spool 01 and a certain amount of deformation occurs, thereby fixing the lead spool 01 in the rotating component 3. Exemplarily, the limiting ring 2 and the convex ring 21 are integrally formed rubber parts, and the limiting ring 2 is interference fit with the mounting groove.

[0039] Other structures and operations of the small wire shaft installation structure of a bonding machine according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0040] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A small wire shaft installation structure for a bonding machine, characterized in that: It includes a mounting shaft, a limiting ring and a rotating assembly, an elastic member and a locking assembly; The rotating assembly is rotatably mounted on the mounting shaft, the limiting ring is sleeved outside the rotating assembly, and the limiting ring is used to relatively fix the position of the lead wire shaft and the rotating assembly; The locking assembly is arranged on the installation shaft, and the position of the locking assembly on the installation shaft is adjustable, one end of the elastic member abuts against the rotating assembly, and the other end abuts against the locking assembly; The rotating assembly includes a spool drum and bearings, wherein the bearings are arranged at both ends of the spool drum, and the bearings are fixedly mounted on the mounting shaft; The outer wall of the spool drum is provided with a mounting groove for accommodating the limiting ring, and the elastic member abuts against the outer ring of the bearing or the spool drum.

2. The small wire shaft installation structure of the bonding machine according to claim 1, characterized in that: The locking assembly comprises a core barrel and an outer barrel, wherein the core barrel is sleeved outside the mounting shaft, and the outer barrel is sleeved outside the core barrel; The core tube is provided with an axially penetrating opening, an outer wall of one end of the core tube close to the elastic member is provided with an outwardly facing inclined platform, an inner peripheral wall of one end of the outer tube is provided with an inclined surface, and the inclined platform is in contact with the inclined surface.

3. The small wire shaft installation structure of the bonding machine according to claim 2, characterized in that: The outer wall of the core barrel and the inner wall of the outer barrel are respectively provided with threads, and the core barrel and the outer barrel are threadedly connected.

4. The small wire shaft installation structure of the bonding machine according to claim 2, characterized in that: One end of the core tube away from the elastic member is connected with a nut, and the nut abuts against the end surface of the outer tube.

5. The small wire shaft installation structure of the bonding machine according to claim 1, characterized in that: The installation shaft is a cylindrical plug gauge rod, and the bearing is arranged on the installation shaft in an interference fit manner.

6. The small wire shaft installation structure of the bonding machine according to claim 1, characterized in that: There are at least two limiting rings, which are fixedly installed in the installation grooves, and the outer peripheral surfaces of the limiting rings are protruding with convex rings.

7. The small wire shaft installation structure of the bonding machine according to claim 1, characterized in that: The elastic member is a compression spring or a cylindrical spring sheet, and the elastic member is sleeved outside the installation shaft.

8. The small wire shaft installation structure of the bonding machine according to claim 7, characterized in that: A buckle and a rubber pad are provided between the elastic member and the rotating assembly, and the buckle is located between the rubber pad and the rotating assembly.

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